FLUID END OF A HIGH PRESSURE PUMP HAVING A GROOVE ADAPTED TO RECEIVE A SPRING RETAINER OF A SUCTION VALVE
A fluid end of a high-pressure pump having a bore, a discharge bore, a suction bore, a valve cover bore, and a cross-bore intersection formed in portions of the fluid end. The bore, discharge bore, valve cover bore, and suction bore each having an opening which opens into the cross-bore intersection with the suction and discharge bores substantially orthogonal to the bore. A groove is formed in a wall of the fluid end within in the cross-bore intersection. The groove traverses a curvilinear path around an open space. The groove has a first section and a second section, each section having a first end and a second end. The first and second sections are separated by a gap proximate the bore and valve cover bore. A spring retainer is received into the groove and secured therein for pump operation.
Latest GARDNER DENVER, INC. Patents:
This application claims the benefit of U.S. patent application Ser. No. 13/646,170 filed Oct. 5, 2012.
FIELDThe present disclosure concerns a tapered groove in a high pressure plunger pump; the groove receives a spring retainer; the spring retainer at a first portion and a second portion is carried in the groove; the groove is configured to prevent the retainer from moving out of the groove along the long axis of the suction bore.
BACKGROUNDSpring retainers for suction valves in high pressure plunger pumps are known. U.S. Pat. No. 7,186,097, Blume, discloses suction valve spring retainers. The retainers are for use in plunger pump housings incorporating structural features for stress relief. These pump housing structural features accommodate access bore plugs that secure suction valve spring retainers that are internally located substantially centrally over the suction bore transition area of the plunger pump housing. Access bore plugs are secured in place on the pump housing one or more threaded retainers. Plunger pumps so constructed are relatively resistant to fatigue failure because of stress reducing structural features, and they may incorporate a variety of valve styles, including top and lower stem-guided valves and crow-foot-guided valves in easily-maintained configuration. Suction valve spring retainers mounted in plunger pump housings may also incorporate a suction valve top stem-guide. Further, certain structural features of access bore plugs may be dimensioned to aid in improving volumetric efficiency of the pumps in which they are used.
U.S. Pat. No. 6,910,871, Blume, discloses valve guide and spring retainer assemblies for use in plunger pump housings that incorporate features for stress relief. These pump housings have structural features to accommodate correspondingly shaped valve guides and/or spring retainers that are internally fixed in place using one or more non-threaded spacers.
U.S. Pat. No. 6,544,012, Blume, discloses a Y-block fluid section plunger pump housing having a cylinder bore which is transversely elongated at its intersection with suction and discharge bores to provide stress relief and reduction in housing weight. A spoked, ring valve spring retainer further reduces stress near the bore intersection and allows use of a top stem guided suction valve. Tapered cartridge packing assemblies facilitate use of a one-piece plunger in Y-block housings and also allow packing in such housings to be changed without removing the plunger.
SUMMARYOne aspect of the invention is embodied by a fluid end of a plunger pump that has a plunger bore, discharge bore, suction bore, valve cover bore, and cross-bore intersection formed in portions of the fluid end. Each of the above named bores has an axis. A plunger bore transition area is at an opening of the plunger bore and also adjacent the cross-bore intersection. A valve cover bore transition area is at an opening of the valve cover bore and also adjacent the cross-bore intersection. The plunger bore and valve cover bore openings open into the cross-bore intersection. The discharge bore and suction bore each have an opening which opens into said cross-bore intersection. The suction bore axis extends through the opening of the discharge bore which opens into said cross-bore intersection. The discharge bore axis extends through the opening of the suction bore which opens into said cross-bore intersection. The valve cover bore axis extends into the opening of the plunger bore which opens into the cross-bore intersection.
The fluid end further has a groove. The groove traverses a curvilinear path around an open space. The discharge bore and suction bore axes each extend into said open space. The groove has a first section and a second section. The first section has a first end with a first opening and a second end. The second section has a first end. The second section has a second end with an opening. The first and second sections each have a closed base opposite and an open side of each section. The first and second sections each have a first angled surface and a second angled surface. The first angled surface and second angled surface of the first section converge towards each other towards the base of the first section. The angle formed between the first angled surface and second angled surface of the first section is greater than 90° and less than 180°. The first angled surface and second angled surface of the second section converge towards each other towards the base of the second section. The angle formed between the first angled surface and second angled surface of the second section is greater than 90° and less than 180°. A gap is between said first ends of said first and second sections of the groove. A gap is between the second ends of said first and second sections of the groove.
A further aspect of the invention is characterized in that the plunger bore transition area is between and coplanar with the first end of the first section of the groove and the first end of the second section of the groove. The valve cover bore transition area is between and coplanar with the second end of the first section of the groove and the second end of the second section of the groove.
Yet in another aspect of the invention a first portion of a spring retainer is in the first section of the groove and a second portion of the spring retainer is in the second section of said groove.
Another aspect of the invention is embodied in a spring retainer. The retainer has a first portion having a first side with a first surface and a second surface. The first portion has a second side with a third surface. The first surface is angled relative to the second surface. The exterior angle formed by the surfaces is greater than 180° and less than 270°. The retainer has a second portion. The second portion has a first side with a first surface and a second surface. The second portion has a second side with a third surface. The first surface of the second portion is angled relative to the second surface of the second portion. The exterior angle formed by the surfaces is greater than 180° and less than 270°.
The retainer further has a base portion from which the first portion extends and the second portion extends. The base portion has a first surface on a first side of the base portion. The base portion has a second surface on a second side of the base. The second side is opposite the first side. The third surface of the retainer first portion is angled relative to the base second surface. The angle is greater than 90° and less than 180°. The first surface of the retainer first portion is angled relative to the base first surface. The exterior angle formed by the surfaces is between 180° and 270°. The third surface of the retainer second portion is angled relative to the base second surface. The angle is greater than 90° and less than 180°. The first surface of the retainer second portion is angled relative to the base first surface. The exterior angle formed by the surfaces is greater than 180° and less than 270°.
In a further aspect of the invention the base of the spring retainer has a third surface. The third surface has a central portion and a first end portion angled relative to the central portion. The third surface also has a second end portion angled relative to the central portion. The angle between the first end portion and the central portion is greater than 90° and less than 180°. The angle between the central portion and the second end portion is greater than 90° and less than 180°.
The base also has a fourth surface opposite the third surface. The fourth surface has a central portion and a first end portion angled relative to the central portion. The fourth surface also has a second end portion angled relative to the central portion. The angle between the first end portion and the central portion is greater than 90° and less than 180°. The angle between the central portion and the second end portion is greater than 90° and less than 180°. The third surface is between the base first and second surfaces. The fourth surface is between the base first and second surfaces.
Another embodiment of a retainer includes a base and a first and an opposite second portion extending outwardly from the base. The retainer includes a first portion having a first surface and a second surface. The first surface is angled relative to the second surface such that, in a preferred embodiment, the exterior angle formed by the first and second surfaces may be greater than 180° and less than 270°. In one embodiment, the sum of the exterior angle of the first portion and the angle formed between a first angled surface and a second angled surface of a groove in the fluid end is about three-hundred sixty (360) degrees. Similarly, the retainer second portion has a first surface and a second surface. The first surface is angled relative to the second surface such that, in a preferred embodiment, the exterior angle formed by the first and second surfaces may be greater than 180° and less than 270°. In one embodiment, the sum of the exterior angle of the second portion and the angle formed between the first angled surface and the second angled surface of said groove is about three-hundred sixty (360) degrees. The retainer may include the first and second portions each being angled outwardly relative to the base. The base may include a valve guide aperture therethrough having a size sufficient to receive a valve stem of a suction valve.
While embodiments of this invention can take many different forms, specific embodiments thereof are shown in the drawings and will be described herein in detail with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention, and is not intended to limit the invention to the specific embodiment illustrated.
With reference to
The forces of the fluid may cause the spring retainer 20 to rotate about the retainer central axis 56. The central axis can also be called a third axis of the spring retainer. The retainer, however, is prevented by the valve cover 34 from rotating in a manner which enables the first end portion 58a of the first retainer portion 58 or the first end portion 60a of the second retainer portion 60 to be in a position such that the plunger will contact these end portions or any other portions of the retainer. The valve cover 34 extends through the valve cover bore 34a and overlaps a valve cover bore transition area 78. The valve cover transition area 78 is between a second end of first groove section 86 and a second end of a second section 90. The valve cover bore transition area 78 is coplanar with the second ends of the first and second groove sections 86, 90. The valve cover bore transition area 78 is also coplanar with groove 22. The valve cover is thus in the path of rotation of the retainer 20. The cover provides an abutment to prevent 360° rotation of the spring retainer in either the clockwise or counter clockwise direction.
The configuration of the groove 22 and the retainer 20 further prevent the retainer 20 from moving in a first direction 62 along the long axis 64 of the suction bore 36 towards the discharge bore 46. The configuration of the groove 22 and the retainer 20 further prevent the retainer 20 from moving in a second direction 66 along the long axis 68 of the discharge bore 46 towards the suction valve 40. This further ensures that the end portions 58a, 60a of the retainer 20 and all other portions of the retainer 20 remain outside of the pathway of the plunger 24 so that the plunger 24 does not contact the retainer 20 during its reciprocation. Therefore, the configuration of the groove 22 and the configuration of the portions of the retainer 20 in the groove 22 cooperate such that the retainer 20 will not slip out of the groove 22. The retainer will not slip out of the groove 22 in the direction 62 of the discharge valve 48 along the long axis 64 of the suction bore. It will also not slip out of the groove in the direction 66 along discharge bore long axis 68 towards the suction bore valve 40. The discharge bore long axis extends along the length of the discharge bore. The suction bore long axis extends along the length of the suction bore.
The valve cover bore, suction bore, discharge bore, and plunger bore each have an opening, 34b, 36a, 46a and 32a which opens into the cross-bore intersection 44. The valve cover bore transition area 78 is at the valve cover bore opening 34b. The plunger bore transition area 70 is at the plunger bore opening 32a. The suction bore axis 64 extends through the opening of the discharge bore opening 46a. The discharge bore axis 68 extends though the opening 36a of the suction bore. The valve cover bore central axis 34c extends through opening 32a in the plunger bore. The plunger bore axis 30 extends through opening 34b of the valve cover bore.
Referring to
From the alignment position the spring retainer is rotated to its installed position. It is rotated so that the retainer's long axis is perpendicular to the plunger bore axis. In the installed position, a portion of the first side surface 76a of the retainer first portion 58 overlaps said groove first surface 23a and at least partially contacts said surface. The second side surface 76b of the first retainer portion 58 overlaps and at least partially contacts said second surface 23b of the groove. Further, a rounded transition area 76c between the first side surface 76a and the second side surface 76b of the retainer first portion 58 overlaps a rounded transition area 23c between the groove first surface 23a and groove second surface 23b. The transition areas may contact each other. The first and second side surfaces 76a and 76b of the first portion 58 of the retainer are at the first side 76 of the first portion 58. The first and second side surfaces can also be called first and second surfaces. The first groove section 86 forms a portion of the groove 22 overlapped by the first side surface 76a, second side surface 76b, and rounded transition area 76c of the first retainer portion 58.
Also in the installed position, a portion of the retainer first side surface 80a of the retainer second portion 60 overlaps said groove first surface 23a and at least partially contacts said surface. The second side surface 80b of the retainer second portion 60 overlaps and at least partially contacts said second surface 23b of the groove. Further, a rounded transition 80c area between the first side surface 80a and the second side surface 80b of the retainer second portion overlaps 60 the rounded transition area 23c between the groove first surface 23a and groove second surface 23b. The transition areas may contact each other. The second groove section 90 forms a portion of the groove overlapped by the first side surface 80a, second side surface 80b, and rounded transition area 80c of the second retainer portion 60. The first and second side surfaces 80a and 80b of the second portion 60 of the retainer are at the first side 80 of the second portion 60. The first and second side surfaces can also be called first and second surfaces. Once the retainer is in the installed position the valve cover 34 is installed. The plunger 24 may also be allowed to reciprocate freely in the plunger bore.\
In more detail, the retainer groove 20, as stated has a first section 86 and a second section 90. The first section has a first end with opening 22a that opens into the plunger bore transition area 70. The first section 86 has second end with a second opening 22c which opens into the valve cover bore transition area 78. The valve cover bore transition area 78 can also be called the valve bore transition edge. The groove first section 86 has first surface 23a which can be called a first angled surface. The groove first section 86 has second surface 23b which can be called the second angled surface. The second angled surface and the first angled surface converge towards each other towards the base of the groove. The angle 200 formed between the groove first surface 23a and second surface 23b is greater than 90° and less than 180°. More usually the angle is greater than 100° and less than 150°. The angle is preferably 120° for plunger sizes from 3.75 up to 6.75 inches in diameter. The base of the groove is closed. At the base of the groove is the transition area 23c which joins an end of the first surface 23a to an end of the second surface 23b. As known in the art the fluid end changes in size and dimension as the plunger size changes. The transition area 23c is a rounded surface and has a valley.
The second groove section 90 is of the same construction as the first groove section 86. The second groove section has a first end that has a first opening 22d that opens into the plunger bore transition area 70. The second section 90 has a second end with second opening 22b which opens into the valve cover bore transition area 78. The groove second section 90 has first surface 23a which can be called first angled surface. The groove second section 90 has second surface 23b which can be called the second angled surface. The second surface 23b and the first surface 23a converge towards each other towards the base of the groove. The angle 200 formed between the groove first surface 23a and second surface 23b is between 90° and 180°. The base of the groove is closed. At the base of the groove is the transition surface 23c which joins an end of the first angled surface 23a to an end of the second angled surface 23b. The transition area is rounded and has a valley. Although the first angled surface, second angled surface and rounded transition area of the first and second groove sections 86 and 90 are the same in terms of construction and dimension it is possible they could be different.
Notably the plunger bore transition area is between and coplanar with the first end of the first section 86 of the groove 22 and the first end of the second section 90 of the groove. The plunger bore transition area provides a groove-less gap formed as a rounded surface between the first ends. Also the valve cover bore transition area 78 is between and coplanar with the second end of the first section 86 of the groove 22 and the second end of the second section 90 of the groove 22. The valve cover bore transition area 78 provides a groove-less gap formed as a rounded surface between the second ends.
As can be seen in
The first portion 58 second surface 76b is angled towards the first portion third surface 106. At the closest point between the third and second surface, end edge 114 is formed. The end edge extends from the leading edge 84 to the trailing edge 85. It has a peak between the trailing and leading edges.
A fourth surface 116 of the retainer first portion 58 extends from the trailing edge to the base. The fourth surface 116 is bounded on one side by the third surface 106 and the opposite side by first surface 76a, second surface 76b and the transition area 76c between the first and second surfaces.
A fifth surface 118 of the retainer first portion 58 extends from the leading edge 84 to the base 100. The fifth surface is bounded on one side by the third surface 106 and the opposite side by first surface 76a, second surface 76b and the transition area 76c between the first and second surfaces.
The second portion 60 of the retainer extending from the base 100 is angled relative to the base. The exterior angle 216 is greater than 180° and less than 270°. More usually the angle is greater than 200° and less than 250°. The angle is preferably 240° for plunger sizes from 3.75 up to 6.75 inches in diameter. The second retainer portion 60 has a second side 126 with a third surface 124 which is angled relative to the base second side surface 104a. The angle 218 is greater than 90° and less than 180°. More usually the angle is greater than 100° and less than 150°. The angle is preferably 123° for plunger sizes from 4.5 up to 6.75 inches in diameter wherein the retainer is cast and 130° wherein the retainer is machined. The angle is preferably 125° for plunger sizes 3.75 & 4 inches in_diameters wherein the retainer is cast. The angle is such that a direction going from the base along the third surface towards the first end portion 60a of the retainer second portion 60 is angled away from the retainer's central axis 56. The retainer second portion's first surface 80a is also angled relative to the base first surface 102a. The exterior angle 216 is greater than 180° and less than 270°. More usually the angle is greater than 200° and less than 250°. The angle is preferably 240° for plunger sizes from 3.75 up to 6.75 inches in diameter. The surface is angled such that a direction from the base along the first surface 80a towards the first end portion 60a of the retainer second portion 60 is away from the retainer central axis 56. The retainer second portion's second surface 80b is angled relative to the first surface 80a. The exterior angle 220 is greater than 180° and less than 270°. More usually the angle is greater than 200° and less than 250°. The angle is preferably 240° for plunger sizes from 3.75 up to 6.75 inches in diameter. The second surface is angled such that going in a direction from the first surface along the second surface towards an end edge 132 of the first end portion 60a, the direction is towards the central axis 56. The first 80a and second 80b surfaces of the retainer second portion 60 are not flat. They are rather rounded. The rounded surfaces can be considered convex or arcuate. They have a peak. The transition area 80c which joins the first surface to the second surface is rounded. It has a peak. Further, a rounded transition area 128 which has a peak joins the base first surface 102a to the first surface 80a. Also, a rounded transition area 130 with a valley joins the base second side surface 104a to the third surface 124 of the retainer second portion. As stated, the retainer second portion has a leading edge 88. It also has a trailing edge 89.
The second surface 80b of the retainer second portion is angled towards the third surface 124 of the retainer second portion. At the closest point between the third surface and second surface end edge 132 is formed. The end edge extends from the leading edge 88 to the trailing edge 89. It has a peak between the trailing 89 and leading 88 edges.
A fourth side surface 134 of the retainer second portion 60 extends from the trailing edge 89 to the base 100. The fourth side surface 134 is bounded on one side by the third surface 124 and the opposite side by first surface 80a, second surface 80b and the transition area 80c between the first and second surfaces.
A fifth side surface 136 of the retainer second portion 60 extends from the leading edge 88 to the base 100. The fifth side surface 136 is bounded on one side by the third surface 124 and on an opposite side by first surface 80a, second surface 80b and the transition area 80c between the first and second surfaces.
The base has a third surface 120 and an opposite fourth surface 122. The fourth surface is between the base first 102a and second 104a surface. The third surface, opposite the fourth surface, is between the base first and second surface. The fourth surface has a central portion 122a and a first end portion 122b angled relative to the central portion and a second end portion 122c angled relative to the central portion. The angle 208 between the first end portion and the central portion is between 90° and 180°. The angle 210 between the central portion and the second end portion is between 90° and 180°. The angles between the first portion and central portion and the second portion and central portion are the same and more usually the angles 208, 210 are greater than 100° and less than 150°. The angles 208, 210 are preferably 155° for plunger bore sizes from 3.75 up to 6.75 inches in diameter.
The third surface of the base has a central portion 120a and a first end portion 120b angled relative to the central portion and a second end portion 120c angled relative to the central portion. The angle 212 between the first end portion 120b and the central portion 120a is between 90° and 180°. The angle 214 between the central portion 120a and the second end portion 120c is between 90° and 180°. The angles between the first portion and central portion and the second portion and central portion are the same and more usually the angles 212, 214 are greater than 100° and less than 150°. The angles 212, 214 are preferably 155° for plunger bore sizes from 3.75 up to 6.75 inches in diameter. The angles 208, 210, 212, 214 help ensure the retainer properly abuts up against the valve cover as it tries to turn in either rotational direction.
Spring receiving boss 82 extends outward from the base 100 first side surface 102a along the retainer central axis 56.
Notably the base third surface 120 is integral with the fourth surface 116 of the first 58 retainer portion and the fifth surface 136 of the second 60 retainer portions. The base fourth surface 122 is integral with the fifth surface 118 of the first retainer portion and the fourth surface 134 of the second retainer portion.
In addition to a central axis, the retainer has a second, short axis 138, extending through the base third and fourth surfaces. It also has a first, long axis 140, extending through the end at the end edge 114 of the retainer first portion 58 and the end at the end edge 132 of the retainer second portion 60. The first axis is perpendicular to the second axis and central or third axis 56. The third axis is perpendicular to the second axis. The second axis extends along a width of the retainer. The first axis extends along a length of the retainer. The length is at least twice the width.
The distance 230, wherein the distance is taken along the direction of the suction bore axis, between the plunger's long axis and rounded transition portion 23c as shown in
Another embodiment of fluid end 400 for use in a piston pump is illustrated in
As shown in
Now turning to
As shown in
Further, as shown in
Third surface 480 may intersect with a primarily radially extending surface 491 of key 490 at an angle 499 wherein angle 499 may range from one-hundred ten (110) degrees to two-hundred fifty (250) degrees, preferably being in a range between around one-hundred thirty-five (135) degrees and around two-hundred twenty-five (225) degrees. Further fourth surface 482 may intersect with a primarily radially extending surface 493 of key 490 at an angle 501 wherein angle 501 may range from one-hundred ten (110) degrees to two-hundred fifty (250) degrees, preferably being in a range between around one-hundred thirty-five (135) degrees and around two-hundred twenty-five (225) degrees. In one embodiment, angles 499 and 501 are configured to orientate key 490 substantially orthogonal to the wall forming open space 420 that includes groove 430. The primarily radially extending surface 491 intersects a primarily axially extending surface 495 of key 490. The surface 495 is opposite first surface 492. Surface 495 is raised in the axial direction relative to surface 491. The area of intersection of surface 495 with surface 491 is concavely rounded. The primarily radially extending surface 493 intersects a primarily axially extending surface 497 of key 490. The surface 497 is opposite second surface 494. Surface 497 is raised in the axial direction relative to surface 493. The area of intersection of surface 497 with surface 493 is concavely rounded.
Similarly, as shown in
Further, as shown in
Third surface 502 may intersect with a primarily radially extending surface 513 of key 512 at an angle 521 wherein angle 521 may range from one-hundred ten (110) degrees to two-hundred fifty (250) degrees, preferably being in a range between around one-hundred thirty-five (135) degrees and around two-hundred twenty-five (225) degrees. Further fourth surface 504 may intersect with a primarily radially extending surface 515 of key 512 at an angle 523 wherein angle 523 may range from one-hundred ten (110) degrees to two-hundred fifty (250) degrees, preferably being in a range between around one-hundred thirty-five (135) degrees and around two-hundred twenty-five (225) degrees. In one embodiment, angles 521 and 523 are configured to orientate second key 512 substantially orthogonal to the wall forming open space 420 that includes groove 430. The primarily radially extending surface 513 intersects a primarily axially extending surface 517 of key 512. The surface 517 is opposite first surface 514. Surface 517 is raised in the axial direction relative to surface 513. The area of intersection of surface 517 with surface 513 is concavely rounded. The primarily radially extending surface 515 intersects a primarily axially extending surface 519 of key 512. The surface 519 is opposite second surface 516. Surface 519 is raised in the axial direction relative to surface 515. The area of intersection of surface 519 with surface 515 is concavely rounded.
As shown in
As shown in
Retainer ring 428 is installed similarly to the embodiment described above. To install retainer ring 428 and retain valve 532 in suction bore 410, a user will insert valve seat 538 and valve 532 through valve cap bore 406 and drop the valve seat 538 and valve 532 into suction bore 410 into an installed position with valve stem 536 extending upward as shown in
As shown in
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims
1. A fluid end of a pump comprising:
- a bore formed in a portion of said fluid end; said bore having a long axis;
- a discharge bore formed in a portion of said fluid end, said discharge bore having a long axis;
- a suction bore formed in a portion of said fluid end, said suction bore having a long axis;
- a valve cover bore formed in a portion of said fluid end, said valve cover bore having a central axis, said central axis extending into said bore;
- a cross-bore intersection formed in a portion of said fluid end, said bore, discharge bore, valve cover bore, and suction bore each having an opening which opens into said cross-bore intersection, said suction bore long axis extends through said opening of said discharge bore which opens into said cross-bore intersection, said discharge bore long axis extends through said opening of said suction bore which opens into said cross-bore intersection, said valve cover bore axis extends through said opening of said bore which opens into said cross-bore intersection;
- a bore transition area at said bore opening into said cross-bore intersection and adjacent cross-bore intersection;
- a valve cover bore transition at said valve cover bore opening into said cross-bore intersection and adjacent said valve cover bore and cross-bore intersection;
- a groove, said groove traverses a curvilinear path around an open space, said discharge bore and suction bore long axes each extend into said open space, said groove has a first section and a second section; said first section has a first end and a second end; said second section has a first end and a second end; said first and second sections each have a closed base opposite and an open side of each section, said first and second sections each have a first angled surface and a second angled surface, the first angled surface and second angled surface of the first section converge towards each other towards the base of the first section, the angle formed between the first angled surface and second angled surface of the first section is between 90° and 180°; the first angled surface and second angled surface of the second section converge towards each other towards the base of the second section, the angle formed between the first angled surface and second angled surface of the second section is greater than 90° and less than 180°;
- a gap is between said first ends of said first and second sections of said groove;
- a gap is between said second ends of said first and second sections of said groove.
2. The fluid end of claim 1 further comprising a spring retainer adapted to support a spring of a suction valve in said pump, said spring retainer comprising:
- a first portion having a first surface and a second surface, the first surface is angled relative to the second surface, the exterior angle formed by the intersection of the first and second surfaces is greater than 180° and less than 270° and wherein the sum of the exterior angle formed by the intersection of the first and second surfaces of the first portion and the angle formed between the first angled surface and the second angled surface of said groove is about three-hundred sixty (360) degrees;
- a second portion having a first surface and a second surface, the first surface is angled relative to the second surface, the exterior angle formed by the intersection of the first and second surfaces is greater than 180° and less than 270° and wherein the sum of the exterior angle of the first and second surfaces of the second portion and the angle formed between the first angled surface and the second angled surface of said groove is about three-hundred sixty (360) degrees;
- a base from which the first portion extends and the second portion extends;
- wherein a third surface of the retainer first portion is angled outwardly relative to the base; and
- wherein a third surface of the retainer second portion is angled outwardly relative to the base.
3. A spring retainer adapted to support a spring of a suction valve in a pump, said spring retainer comprising:
- a first portion having a first surface and a second surface, the first surface is angled relative to the second surface, the exterior angle formed by the surfaces is greater than 180° and less than 270°;
- a second portion having a first surface and a second surface, the first surface is angled relative to the second surface, the exterior angle formed by the surfaces is greater than 180° and less than 270°;
- a base from which the first portion extends and the second portion extends;
- wherein a third surface of the retainer first portion is angled outwardly relative to the base, said third surface intersects an axial extending surface of said base, the axial surface extends away from the point of intersection towards an upper surface of the base; the upper surface and a portion of the axial surface are above the point of intersection; and
- wherein a third surface of the retainer second portion is angled outwardly relative to the base, said third surface intersects an axial extending surface of said base, the axial surface extends away from the point of intersection towards an upper surface of the base; the upper surface and a portion of the axial surface are above the point of intersection.
4. The spring retainer of claim 3 wherein the base includes a first end and a second end and the third surface of the retainer first portion is angled relative to said first end at an angle between around forty-five (45) degrees and around one-hundred thirty-five (135) degrees, and the third surface of the retainer second portion is angled relative to said second end at an angle between around forty-five (45) degrees and around one-hundred thirty-five (135) degrees.
5. The spring retainer of claim 3 wherein said first surface and said second surface of said first portion define a first key and said first surface and said second surface of said second portion define a second key wherein said first and second keys are configured to be received into a groove within a cross-bore intersection of a fluid end of said pump.
6. The spring retainer of claim 5 wherein said first and second key are substantially orthogonal to a wall including a groove within a cross-bore intersection of a fluid end of a piston pump when said spring retainer is in an installed position.
7. The spring retainer of claim 3 wherein the base further includes an upper surface and a lower surface which define a thickness and the base includes a valve guide aperture through the thickness of said base, wherein the valve guide aperture is sized to receive a valve stem of a suction valve.
8. The spring retainer of claim 3 wherein the base includes an upper surface and a lower surface that defines a thickness and the base includes a spring receiving boss extending outwardly from said lower surface of said base.
9. The spring retainer of claim 8 wherein the base includes a valve guide aperture through the thickness of said base and through said spring receiving boss wherein the valve guide aperture is sized to receive a valve stem of a suction valve.
10. The spring retainer of claim 9 wherein the valve guide aperture includes a step in thickness defining a first section of a first diameter and a second section of a second diameter wherein the first diameter is smaller than the second diameter and wherein said valve guide aperture includes a valve guide insert disposed within said second section.
11. The spring retainer of claim 3 wherein the base includes a first side and a second side which define a width wherein said width is less than a diameter of a valve cover bore of a piston pump.
12. The spring retainer of claim 3 wherein the base further includes an upper surface and a lower surface which define a thickness;
- the first portion includes a fourth surface opposite said third surface, said third and fourth surfaces define a first portion thickness;
- the second portion includes a fourth surface opposite said third surface, said third and fourth surfaces define a second portion thickness; and
- wherein the first and second portion thicknesses are less than the thickness of the base.
13. A spring retainer adapted to support a spring of a suction valve in a pump, said spring retainer comprising:
- a base having a first end, a second end, an upper surface and a lower surface;
- a first portion extending outwardly from said first end of said base, said first portion including a first end and a second end, said first end proximate said base and said second end including a first key defined by a first surface and a second surface, said first and second surfaces angled outwardly and intersecting to form an exterior angle being greater than 180° and less than 270°, said first portion extending at an angle from said first end of said base, the angle being around forty-five (45) degrees to around one-hundred thirty-five (135) degrees;
- a second portion extending outwardly from said second end of said base, said second portion including a first end and a second end, said first end proximate said base and said second end including a second key defined by a first surface and a second surface, said first and second surfaces angled outwardly and intersecting at an exterior angle being greater than 180° and less than 270°, said second portion extending at an angle from said first end of said base, the angle being around forty-five (45) degrees to around one-hundred thirty-five (135) degrees;
- a spring-retaining boss extending outwardly from said lower surface of said base; and
- a valve guide aperture through said upper surface and lower surface of said base and through said spring-retaining boss, said valve guide aperture being sized to receive a valve stem of a suction valve.
14. The spring retainer according to claim 3 wherein the pump is a piston pump.
15. The spring retainer according to claim 4 wherein the pump is a piston pump.
16. The spring retainer according to claim 5 wherein the pump is a piston pump.
17. The spring retainer according to claim 13 wherein the pump is a piston pump
Type: Application
Filed: Feb 21, 2013
Publication Date: Mar 27, 2014
Applicant: GARDNER DENVER, INC. (Wayne, PA)
Inventors: Arun Nahendra Raj CHANDRASEKARAN (Broken Arrow, OK), Christopher Douglas DEGGINGER (Broken Arrow, OK), Gregory David HASH (Broken Arrow, OK)
Application Number: 13/773,271
International Classification: F04B 53/10 (20060101);