DEVICE TO TRANSFER LUBRICANT IN A LUBRICATING ASSEMBLY AND IMPLEMENTATION THEREOF
A slinger member that is part of a lubricating system that flings, or slings, fluid lubricant about the interior of rotating machinery. The slinger member can include a plate body having a central axis and an outer peripheral edge circumscribing the central axis. The plate body can comprise a lubricant collection member, generally a rolled edge member with one or more openings disposed therethrough. The plate body can further comprise a plurality of rib members that are disposed circumferentially about the central axis. These rib members are configured to prevent deflection of the plate body. In one example, the slinger member can incorporate a hub member with a central bore that has an internal surface with a coupling member disposed thereon. The coupling member can be part of a coupling mechanism that can prevent rotation of the slinger member about a shaft member found on the lubricating system.
This application claims the benefit of priority to U.S. Provisional Application Ser. No. 61/985,171, filed Apr. 28, 2014, entitled “LUBRICATING MEMBERS, LUBRICATING ASSEMBLY, AND LUBRICANT DISPERSAL SYSTEM COMPRISED THEREOF.” This application relates to commonly-owned applications identified as U.S. patent application Ser. No. ______, filed on Nov. 30, 2014 and entitled “DEVICE TO DIRECT LUBRICANT IN A LUBRICATING ASSEMBLY AND IMPLEMENTATION THEREOF” and U.S. patent application Ser. No. ______, filed Nov. 30, 2014 and entitled “DEVICE TO RETAIN LUBRICANT IN A LUBRICATING ASSEMBLY AND LUBRICATING SYSTEM COMPRISED THEREOF.”
BACKGROUNDThis disclosure relates generally to lubricating systems found on compressors and machinery that can pressurize a working fluid and, more specifically, to an improved plate member that is configured to better disperse lubricant among components in the compressor.
Most industrial machinery incorporates a myriad of moving parts that are necessary for the machinery to perform its intended functions. Compressors, for example, include many parts that are in contact and move (e.g., rotate, translate, etc.) relative to other parts, often at high speeds and/or under heavy loads. Parts that operate under these conditions for long periods of time can wear, which can eventually cause failures that interrupt operation of the machinery. To avoid such problems, compressors will utilize lubricants such as oils, greases, and like substances that can reduce friction between moving parts. The lubricants can help to avoid breakdown of the moving parts. Nominally, an effective lubricating fluid management design is required to disperse the lubricant to the rotating components and collect it for further use.
One particular lubricating fluid management design is a splash lubricating oil system. Examples of these systems have a shaft and a flat plate body (or “slinger”) having a circular or disc shape and a rolled peripheral edge. In operation, the shaft member rotates the slinger to pass the rolled peripheral edge through the reservoir of lubricant. Rotation of the slinger generates centrifugal action that effectively transfers, or slings, the lubricant from the rolled peripheral edge. This action splashes the lubricant randomly on the interior surfaces of the compressor.
BRIEF DESCRIPTION OF THE INVENTIONThis disclosure describes improvements to the members found in splash lubricating oil systems. These improvements provide features that can enhance performance, extend useful life, simplify manufacture, and make the members more amenable to consistent fabrication constraints (e.g., tolerances). As noted more below, at least one improvement provides a slinger member that includes a reinforcement member. Examples of the reinforcement member effectively reduce, and often prevent, deflection of the slinger member during manufacture and operation as part of the lubricating system. Another improvement provides a slinger member with a hub member that is configured to prevent rotation of the slinger member about the shaft.
Reference is now made briefly to the accompanying drawings, in which:
Where applicable like reference characters designate identical or corresponding components and units throughout the several views, which are not to scale unless otherwise indicated. Moreover, the embodiments disclosed herein may include elements that appear in one or more of the several views or in combinations of the several views.
DETAILED DESCRIPTIONThe embodiments herein incorporate improvements that address certain problems found in conventional lubricating systems for use with compressors. As used herein, the term “compressor” describes machinery (including compressors and blowers) that acts on a working fluid, for example, to pressurize the working fluid to distribute on a process line. Examples of the process lines may be found in various applications including chemical, petro-chemical, resource recovery and delivery, refinery, and like sectors and industries. However, this disclosure does not foreclose use of the improvements, in whole or in part, in applications that can benefit from the distribution of lubricant that arises from the embodiments contemplated herein.
Notably, after multiple blowers failed in the field, resulting in expensive warranty claims, an engineering analysis was undertaken of several conventional lubricating systems, including 3-D element modeling, to determine root causes for the failures and to identify design modifications that would address the problems. Evidence from this analysis suggested that the rotating components (e.g., the shaft member and the slinger member) in the conventional lubricating system may be moving relative to each other due to vibrations and dynamic forces during operation. In particular, it was found that the coupling of the conventional slinger member to the conventional shaft member may loosen, which allowed the conventional slinger member to move relative to the conventional shaft member. It was also found that the conventional slinger member may distort beyond its flatness requirement, typically a tolerance of ±1 mm (˜0.030 inches).
This disclosure provides embodiments of a slinger member that address the findings of this analysis. These embodiments can have a generally flat, or planar, plate body that incorporates a reinforcement member in the form of for example, one or more radial ribs disposed circumferentially about the center axis of the flat plate body. This reinforcement member increases the stiffness of the flat plate body. During manufacturing, the stiffer flat plate body can result in higher part yield (e.g., less scrap and dimensional deviations). The improvements in stiffness are also beneficial during operation of the lubricating system because the slinger member, with the reinforcement member, deflects much less than conventional parts without any reinforcement. As a further improvement, the lubricating system may incorporate a new coupling mechanism (e.g., a keyed joint) that prevents relative rotation between the slinger member and the shaft.
Examples of the lubricating system 102 are also known as “oil slinger” systems and/or “splash lubrication oil systems.” As noted herein, these names are synonymous of systems that operate rotating components to move, or “sling,” lubricant (or other fluids) from a lower part of the chamber 114 to an upper part of the chamber 114. This action disperses the lubricant onto components (e.g., gears, bearings, etc.) that require lubricant to reduce friction and avoid wear and premature breakdown. The lubricating assembly 100 is configured to capture and retain some of the lubricant that falls back down toward the bottom of the chamber 114 (
Referring to
In one implementation, the shaft member 124 has a first end, a second end, and an axis that aligns with the longitudinal axis 138. The shaft member 124 can insert into one or more components. This feature positions each of the slinger member 118, the bearing clamp member 120, and the components of the bearing assembly 126 on the shaft member 124 in alignment with the axis. On the front side 134, the first end of the shaft member 124 is typically exposed to accept the locking member 132, which engages the first end of the shaft member 124 to secure the parts of the lubricating system 102 together. The second end of the shaft member 124 can receive a belt and/or other drive mechanism. During operation of the lubricating system 102, the drive mechanism can rotate the shaft member 124 about the longitudinal axis 138. The shaft member 124, in turn, rotates the slinger member 118, which picks up lubricant from the bottom of the chamber 114 (
The central bore 248 has an internal surface 250 that circumscribes the central axis 242. This internal surface 250 may be smooth, or otherwise featureless, to compliment the surface finish of the shaft member 224. This smooth surface can allow the shaft member 224 to easily insert into the central bore 248. In one embodiment, the plate body 240 may be coupled to the hub member 246 with a fastener member 252. Examples of the fastener member 252 can include one or more rivets, threaded fasteners (e.g., screws) and like elements, although this disclosure contemplates use of welds and, in some cases, unitary and/or monolithic construction of the plate body 240 and hub member 246. In another example, the hub member 246 is formed integrally with the plate body 240.
It may be desirable that the hub member 246 couple securely with the shaft member 224 in a manner that will not loosen due to the vibration and dynamic loading that occurs during operation of the lubricating system 202. To this end, the system 202 may utilize a coupling mechanism to facilitate the connection between the shaft member 224 and the hub member 246. This coupling mechanism may be configured to engage each of the slinger member 218 and the shaft member 224 to prevent rotation of the slinger member 218 about the shaft member 224 and/or about the central axis 242.
The illustrated embodiment in
In one implementation, these configurations may embody a key-and-slot formation that comprises elements including a recess and a protrusion, also noted herein as a “slot” and a “boss.” These elements may extend in a direction (generally, longitudinally) along the central axis 242. This type of formation uses the slot to form a longitudinal recess that penetrates a surface of one of the shaft member 224 and the slinger member 218 (for example, the internal surface 250). The boss, on the other hand, forms a longitudinal protrusion that extends radially away from the surface of one of the shaft member 224 and the slinger member 218 (for example, the internal surface 250). The longitudinal slot can be configured to receive the longitudinal protrusion with the shaft member 224 inserted into the central bore 248 on the slinger member 218. In one embodiment, the first coupling member 254 can comprise the longitudinal protrusion on the internal surface 250. The longitudinal protrusion extends radially away from the internal surface 250 and extends longitudinally along the central axis 242. The first coupling member 254 may, alternatively, comprise the longitudinal recess. In one example, the longitudinal recess penetrates the internal surface 250 (i.e., extends radially away from the central axis 242) into the hub member 246 and extends longitudinally on the internal surface 250 along the central axis 242. This disclosure does contemplate other configuration for the coupling mechanism, using one or both of the coupling members 254, 256 as well as or in addition to other combinations of elements that can minimize, if not prevent, relative movement between the hub member 246 and the shaft member 224.
Turning next to
As also shown in
The construction of the rib members 264, 265 in
In
The lubricant collection member 262 can be formed by the rolled and/or curved edge of the plate body 240. Broadly, the configuration of lubricant collection member 262 provides particular utility as relates to the implementation of the slinger member 218 and the lubricating system 200 in the blower 104 of
Referring to
With reference again to
In view of the foregoing discussion, embodiments of the slinger member address problems found during engineering analysis and study of the operation of conventional oil slinger systems and/or splash lubrication oil systems. One of the improvements introduces the hub member and coupling mechanism to prevent rotation of the hub member relative to the shaft. Another improvement introduces the reinforcement member (e.g., the rib members) to stiffen the plate body. This reinforcement member can prevent the slinger member from shifting during the manufacturing process (e.g., stamping). For example, use of the rib members on the plate body can meet a flatness requirement of plus or minus 1 mm (˜0.030 inches) during manufacture. This feature of the improved slinger member can increase the production yield during manufacture and overall operation of the lubricant systems disclosed herein. In one embodiment, the rolled edge member can also operate, in whole or in part, to provide increased torsional stiffness to decrease deflections in the plate body.
As used herein, an element or function recited in the singular and proceeded with the word “a” or “an” should be understood as not excluding plural said elements or functions, unless such exclusion is explicitly recited. Furthermore, references to “one embodiment” of the claimed invention should not be interpreted as excluding the existence of additional embodiments that also incorporate the recited features.
This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims
1. A slinger member for a splash lubrication oil system, said slinger member comprising:
- a plate body having a central axis and an outer peripheral edge circumscribing the central axis, the plate body comprising a lubricant collection member disposed about the outer peripheral edge, the plate body further comprising a one or more rib members disposed radially inside of the lubricant collection member, the one or more rib member configured to prevent deflection of the plate body during manufacture.
2. The slinger member of claim 1, wherein the one or more rib members include a first rib member with a rib body formed as a boss protrusion that extends longitudinally away from a surface of the plate body in a direction along the central axis and that extends radially in a direction away from the central axis towards the outer peripheral edge.
3. The slinger member of claim 2, wherein the rib body has an oval shape with a first end and a second end, wherein the rib body is symmetrical about a second axis that extends between the first end and the second end and is symmetrical about a centerline that bisects the oval shape between the first end and the second end.
4. The slinger member of claim 3, wherein the oval shape has a length as measured radially away from the central axis that is 30% of the radius of the plate body.
5. The slinger member of claim 2, wherein the one or more rib members form an array, wherein the array has a second rib member spaced annularly apart from the first rib member about the central axis.
6. The slinger member of claim 1, further comprising a hub member configured to couple with the plate body, the hub member comprising an elongated body that extends through the plate body, the elongated body having a central bore forming an internal surface with a first coupling member disposed thereon.
7. The slinger member of claim 6, wherein the first coupling member comprises a longitudinal protrusion that extends radially away from the internal surface and that extends longitudinally along the central axis.
8. The slinger member of claim 6, wherein the first coupling member comprises a longitudinal recess that penetrates the internal surface into the hub member and longitudinally along the central axis.
9. The slinger member of claim 6, wherein the lubricant collection member comprises a rolled edge member with one or more openings disposed circumferentially about the central axis.
10. The slinger member of claim 9, wherein rolled edge member forms an internal reservoir between a first with an opening radially interior to the outer peripheral edge.
11. A splash lubrication system, comprising:
- a shaft member; and
- a slinger member configured to couple with the shaft member, the slinger member comprising a plate body having a central bore with a first axis, the central bore configured to receive the shaft member therein, the plate body having a flat section with one or more rib members that are configured to prevent deflection of the plate body during manufacture, the one or more rib members having a rib body that extends from a first end to a second end along a second axis, wherein the second axis extends through the first end, the second end, and the first axis.
12. The splash lubrication system of claim 11, wherein the one or more rib members comprise a first rib member and a second rib member that is spaced annularly apart from the first rib member about the first axis.
13. The splash lubrication system of claim 11, wherein the rib body forms a recess on a first side of the plate body and a protrusion on a second side of the plate body in the flat section.
14. The splash lubrication system of claim 13, wherein the rib body has an oval shape with a pair of side edges that are parallel and in which the first end and the second end are curved, wherein the oval shape is symmetrical about the second axis and is symmetrical about a centerline that bisects the oval shape between the first end and the second end.
15. The splash lubrication system of claim 11, wherein the slinger member comprises a hub member configured to couple with the plate body, wherein the hub member comprises an elongated body that extends through the plate body and that forms the central bore to receive the shaft member therein, wherein the elongated body includes a first coupling mechanism that is configured to engage a second coupling mechanism on the shaft, and wherein the first coupling mechanism and the second coupling mechanism are configured to prevent rotation of the hub member relative to the shaft member.
16. A compressor, comprising:
- a splash lubricating system with a shaft member and a slinger member that couples with the shaft member in position to at least partially contact a reservoir of lubricant disposed inside of said compressor,
- wherein the slinger member comprises a plate body having a circular shape, wherein the plate body comprises a plurality of rib members that are disposed circumferentially about the shaft member and extend radially away from the shaft member.
17. The compressor of claim 16, wherein the plurality of rib members each have a rib body that forms a recess on a first side of the plate body and a protrusion on a second side of the plate body in the flat section, wherein the rib body has an oval shape with a pair of side edges that are parallel and a first end and a second end that are curved, and wherein the oval shape is symmetrical about a second axis that extends between the first end and the second end and is symmetrical about a centerline that bisects the oval shape between the first end and the second end.
18. The compressor of claim 17, wherein the oval shape a length as measured radially away from the shaft member, and wherein the length has a value of 30% of the radius of the plate body.
19. The compressor of claim 16, wherein the slinger member comprises a hub member configured to couple with the plate body, wherein the hub member comprises an elongated body that extends through the plate body and that forms the central bore to receive the shaft member therein.
20. The compressor of claim 19, wherein the elongated body includes a first coupling mechanism that is configured to engage a second coupling mechanism on the shaft member, and wherein the first coupling mechanism and the second coupling mechanism are configured to prevent rotation of the hub member relative to the shaft member.
Type: Application
Filed: Nov 30, 2014
Publication Date: Oct 29, 2015
Inventor: Cory Alfred Nation (Connersville, IN)
Application Number: 14/556,168