Coolant pump for x-ray device

Abstract

This disclosure generally concerns x-ray device cooling systems and related components. One example of such a component is a coolant pump that includes an casing with a pair of fluid interfaces and an electrical interface. The casing includes a body with first and second ends. A motor is disposed within the casing and includes a shaft to which an impeller is attached. A first end cover is attached to the first end of the casing body, and a second end cover includes an electrical interface and is attached to the second end of the casing. Each of the end covers cooperates with a corresponding sealing element to aid in sealing the casing. One or both of the end covers is removably attached to the body of the casing to permit removal and repair/replacement of components disposed within the casing.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to x-ray systems, devices, and related components. More particularly, exemplary embodiments of the invention concern cooling systems and components for x-ray imaging systems.

2. Related Technology

The ability to consistently develop high quality radiographic images is an important element in the usefulness and effectiveness of x-ray devices as diagnostic tools. However, various factors relating to the construction and/or operation of the x-ray device often serve to materially compromise the quality of radiographic images generated by the device. Such factors include, among others, various thermally induced effects such as the occurrence of physical changes in the x-ray device components as a result of high operating temperatures and/or thermal gradients. These factors are cause for concern in therapeutic x-ray devices as well.

The physical changes that occur in the x-ray device components as a result of the relatively high operating temperatures typically experienced by the x-ray device are of particular concern. Not only do the high operating temperatures impose significant mechanical stress and strain on the x-ray device components, but the heat transfer effected as a result of those operating temperatures can cause the components to deform, either plastically or elastically.

While plastic deformation of an x-ray device component is a concern because it may be symptomatic of an impending failure of the component, elastic deformation of the x-ray device components under high heat conditions is problematic as well. For example, as the various components and mechanical joints are subjected to repeated elastic deformation under the influence of thermal cycles, the connections between the components can loosen and the components may become misaligned or separated. In addition, the elastic deformation of x-ray device components has significant implications as well with respect to the performance of the x-ray device.

Accordingly, various cooling systems, components and devices have been considered in an effort to confront the problems implicated by the high operating temperatures and thermal cycles typically experienced in x-ray devices and imaging system environments. As discussed below however, many cooling systems and devices, particularly coolant pumps, have proven to be problematic.

One problem that is of particular concern relates to the nature of the construction of coolant pumps used in x-ray device cooling systems. For example, many of such coolant pumps include multiple parts that are separately manufactured and then attached together to form the coolant pump. Such parts may include the pump body, electrical feedthru, impeller housing, inlet fitting, and outlet fitting. These component parts are manufactured using a variety of different processes, such as fabrication, stamping, and drawing. The large number of coolant pump parts, as well as the wide variety of different manufacturing processes that must be employed to construct those parts, contribute significantly to the relatively high cost of such coolant pumps.

A related problem with many coolant pumps concerns the methods used to assemble the various component parts together. One process commonly used in the assembly of coolant pumps is welding. Welding processes are often used because such processes allow a fair amount of flexibility in terms of the design and construction of the coolant pump. However, the cost of welding is often significant because it is a labor-intensive process. Thus, the use of welding processes contributes further to the expense associated with the construction of coolant pumps that employ a relatively large number of parts.

Welding processes impose other constraints as well on the design and construction of coolant pumps. For example, x-ray device coolant pumps are often employed in harsh environments and so must be constructed of materials that are resistant to corrosion. The cost of the coolant pump can be reduced somewhat by selection of a corrosion resistant material that is relatively easier to weld than other materials, since a simpler welding process may translate to some reduction in cost. This type of approach is problematic however, because materials that are both corrosion-resistant and easy to weld, such as stainless steel, are relatively expensive. Thus, any cost savings that might be obtained by using materials that can be easily welded are often offset by the expense of the material that is used.

The welded construction of some coolant pumps also causes problems later in the life cycle of the pump. In particular, it is sometimes necessary to remove and repair/replace certain pump components, such as the impeller for example, after those components have reached the end of their service life. A welded pump construction complicates the removal process since the welds that join the coolant pump components together must be machined or ground away so that the parts can be separated and the worn out component removed.

Such machining and grinding processes inevitably result in the removal of not only the weld, but a portion of the base material of the component(s) as well. As a result of the removal of the base metal material, there is a practical limit to the number of times that a particular component can be separated from, and then rejoined to, another component before the component(s) must be completely replaced, or the pump scrapped. These machining and welding processes also add to the overall cost of maintaining the pump throughout its life cycle.

The problems with many coolant pumps are not limited just to the construction of the pump itself. For example, another concern with typical coolant pumps is that they are sometimes integrated together with the x-ray tube housing. As a result of this configuration, the position and orientation of the coolant pump and pump connections cannot be readily modified, if at all. In addition, the repair of such coolant pumps can be complicated by the fact that the coolant pump is integral with the housing. Further, the design and construction of the housing are made more difficult if accommodation has to be made for integration of the coolant pump with the housing.

BRIEF SUMMARY OF AN EXEMPLARY EMBODIMENT OF THE INVENTION

In view of the problems in the field that have been identified herein, and other problems not specifically addressed here, it would be useful to provide a coolant pump that has a relatively low part count and that contributes to the ease with which repair, maintenance, and reconfiguration can be performed. Accordingly, exemplary embodiments of the invention are generally concerned with a coolant pump suitable for use as an element of a fluid cooling system.

In one exemplary embodiment of a coolant pump, the coolant pump includes a casing having a body with first and second ends. The casing includes a first fluid interface. A motor is disposed within the body and includes a shaft to which an impeller is attached. The casing also includes a first end cover having a second fluid interface and removably attached to the first end of the body, as well as a second end cover that includes an electrical interface and is removably attached to the second end of the body. Each of the end covers cooperates with a corresponding sealing element to aid in sealing the casing.

In this way, pump components such as the impeller and motor can be readily removed and repaired/replaced without necessitating labor intensive disassembly and reassembly processes. These and other, aspects of exemplary embodiments of the invention will become more fully apparent from the following description and appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order that the manner in which the above-recited and other aspects of the invention are obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Understanding that these drawings depict only exemplary embodiments of the invention and are not therefore to be considered limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

FIG. 1 is a simplified diagram indicating the arrangement of various components of an exemplary x-ray system that includes an x-ray tube and associated cooling system;

FIG. 2A is an exploded view of a coolant pump with a casing that includes a body;

FIG. 2B is a section view, showing the coolant pump illustrated in FIG. 2A, as assembled;

FIG. 3A is an exploded view of an alternative embodiment of a coolant pump with a casing that includes a body; and

FIG. 3B is a section view, showing the coolant pump illustrated in FIG. 3A, as assembled.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE INVENTION

Reference will now be made to the drawings to describe various aspects of exemplary embodiments of the invention. It should be understood that the drawings are diagrammatic and schematic representations of such exemplary embodiments and, accordingly, are not limiting of the scope of the present invention, nor are the drawings necessarily drawn to scale.

Generally, embodiments of the invention are concerned with x-ray imaging systems and associated cooling systems and components. As discussed more particularly below, exemplary implementations provide for a coolant pump that is constructed so as to allow ready removal and replacement of components such as the impeller and motor without necessitating labor intensive disassembly and reassembly processes.

I. X-Ray System

Details will now be provided concerning an exemplary implementation of an x-ray system, denoted generally at 100, in connection with which embodiments of the invention may be employed. While various aspects of exemplary embodiments of the invention are discussed in the context of x-ray systems, devices and related components, the scope of the invention is not limited to any particular type of, or application for, such x-ray systems, devices and related components. For example, aspects of the disclosure are applicable to systems where the radiation source is stationary, relative to the subject, as well as to systems where the radiation source moves relative to the subjects, such as computed tomography (“CT”) systems for example. Similarly, some embodiments of the invention are employed in treatment systems, while other embodiments of the invention find application in diagnostic systems. Accordingly, the scope of the invention should not be construed to be limited solely to the exemplary embodiments and applications disclosed herein.

It should further be noted that while at least some embodiments of the coolant pump disclosed herein are particularly well suited for use in x-ray device cooling systems, the scope of the invention is not limited to such uses. Rather, the coolant pumps disclosed herein can be effectively used in any of a wide variety of fluid systems, one example of which is a fluid coolant system. As the foregoing suggests, the pumps disclosed herein may be referred to as “coolant” pumps for the sake of convenience in describing particular exemplary embodiments, but such pumps can, more generally, be employed in any other suitable application and are not limited to use in cooling systems or in any other particular fluid system.

With attention now to FIG. 1, the exemplary x-ray system 100 includes an x-ray tube housing 102 within which an x-ray tube (not shown) is disposed. Examples of such x-ray tubes include rotating anode and stationary anode x-ray tubes. The x-ray tube housing 102 is configured to contain a volume of coolant, such as a dielectric coolant for example, that serves to remove heat from the x-ray tube as the coolant flows through the x-ray tube housing 102. Additionally, the x-ray tube housing includes a fluid inlet connection 102A and fluid outlet connection 102B, both of which are in fluid communication with a cooling system 200 by way of respective coolant hoses 104A and 104B. In some alternative arrangements, one or both of the coolant hoses are omitted in favor of hard pipe or tubing.

In the exemplary illustrated embodiment, the cooling system 200 includes a coolant pump 202 powered by a motor (not shown). As discussed in further detail below in connection with FIGS. 2A through 3B, the coolant pump 202 may be any of a variety of different types. In at least some implementations, the coolant pump 202 is a centrifugal pump.

In the illustrated embodiment, the coolant pump 202 includes an inlet connection 202A arranged to receive the coolant leaving the x-ray tube housing 102. An outlet connection 202B of the coolant pump 202 directs the flow of coolant into a heat exchanger 204. In general, the heat exchanger 204 serves to remove heat from the coolant received from the x-ray tube housing 102 by way of the coolant pump 202. The heat exchanger 204 can be implemented in various forms, examples of which include a liquid-to-liquid heat exchange configuration, and a liquid-to-air heat exchange configuration. In one example of the latter configuration, one or more fans are used to direct a flow of air across liquid carrying tubes of the heat exchanger.

Although not illustrated in FIG. 1, various instruments, controls, and other devices may be employed in connection with the cooling system 200. Examples of such instruments, controls and devices include, but are not limited to, pump controllers, pressure gages, temperature gages, flow and temperature alarms, and flow control devices.

II. Exemplary Embodiments of a Coolant Pump

Directing attention now to FIGS. 2A and 2B, details are provided concerning an exemplary embodiment of a coolant pump, denoted generally at 300. In the illustrated embodiment, the coolant pump 300 is implemented as a centrifugal pump, but various other types of pumps are employed in other embodiments of the invention and, accordingly, the scope of the invention is not limited to centrifugal pumps.

In general, the coolant pump 300 includes a casing 400 within which is disposed a motor 304 having a shaft 304A to which an impeller 306 is attached. The size and configuration of the impeller 306, as well as the output of the motor 304, may be varied as necessary to suit a particular set of requirements. In addition to the shaft 304A, the motor 304 further includes an electrical connection 304B, exemplarily implemented as a group of wires or cables, by way of which power is supplied. At least some implementations of the invention employ a submerged type motor that includes a wetted stator and rotor. In those embodiments, the motor 304 and the impeller 306 are hermetically sealed within the casing 400, as discussed in further detail below. In some alternative embodiments, dry stator motors are employed.

Turning now to the casing 400, the illustrated embodiment of the casing 400 generally includes a body 402 to which a first end cover 404 and a second end cover are removably attached. The body 402 cooperates with the first and second end covers 404 and 406 to define a cavity 408 within which the motor 304 and impeller 306 are at least partly disposed. Further details concerning the specific configuration and arrangement of the first end cover 404 and second end cover 406 are provided below, and an alternative embodiment of the first end cover is discussed below in connection with FIGS. 3A and 3B.

In at least some implementations, the body 402 is of single piece construction, and is formed by an extrusion process. A body formed by an extrusion process may generally be referred to herein as an “extrusion body.” However, the body 402 may be formed by other processes as well, such as casting or molding. Various types of materials can be used to construct the body 402. Metals, including aluminum for example, are particularly well suited for some applications. Plastics are useful in some applications as well. In at least some cases, the body 402 has a substantially cylindrical geometry, but the body can take other forms as well, depending upon the particular application.

At least some implementations of the body 402 include an integral mounting base 402A which takes the form of a generally flat surface that is drilled and tapped, or otherwise adapted, to facilitate mounting of the coolant pump 300 on a foundation or other structure. The mounting base of the body may, more generally, be arranged and/or configured in other ways as well, depending upon the manner in which the coolant pump 300 is to be mounted.

It was noted above that the first end cover 404 and second end cover 406 are configured to be removably attached to the body 402. To that end, a first end 402B and a second end 402C of the body 402 each define a plurality of tapped holes 402D distributed about the circumference of the body 402. As discussed in further detail below, each of the tapped holes 402D is configured to engage a corresponding fastener passing through the first end cover 404 or second end cover 406.

The first end 402B and a second end 402C of the body 402 each further define a corresponding gland 402E and 402F, respectively. In at least some cases, the glands 404A and 404B are formed by a machining process. In one alternative embodiment, the glands are formed in the first and second end covers 404 and 406, respectively, rather than in the body 402. As indicated in FIGS. 2A and 2B, each of the glands 402E and 402F is configured to receive a corresponding sealing element 410 and 412, such as O-rings for example. This is an exemplary arrangement however, and various other types and configurations of sealing elements can be employed in connection with the body 402 to provide functionality comparable to that of the sealing elements 410 and 412.

Thus, when the first end cover 404 and second end cover 406 are attached to the body 402, the sealing elements 410 and 412 are compressed and the cavity 408 is substantially hermetically sealed. Among other things, this hermetic sealing functionality substantially prevents coolant from leaking out of the casing 400.

With continuing reference to the illustrated embodiment, the casing 400 defines or otherwise includes a pair of fluid interfaces, particularly, a first fluid interface 402G and a second fluid interface 404B, discussed below, both of which are in fluid communication with the cavity 408. In general, the first fluid interface 402G is represented schematically at 202A in FIG. 1 and permits coolant leaving the impeller to exit the casing 400. More generally still, the fluid interfaces disclosed herein serve to facilitate fluid communication between the casing 400 and one or more other components.

In at least some embodiments, the first fluid interface 402G is integral with the body 402. Additionally, the first fluid interface 402G can be configured and positioned as necessary to interface with other elements of the cooling system 200, such as hoses, fittings, pipe, or tubing.

Examples of such configurations of the first fluid interface 402G include, but are not limited to, a quick-disconnect configuration, a threaded configuration, and a straight pipe configuration suitable for use with a hose and hose clamps. Further, the first fluid interface 402G may be implemented in various geometries, examples of which include a 45 degree bend, a 90 degree bend, or a straight configuration. The foregoing discussion of the first fluid interface 402G is germane as well to the second fluid interface 404B.

Finally, the exemplary body 402 is configured to aid in the prevention of axial motion of the motor 304 and impeller 306, as well as prevention of rotation of the motor 304 relative to the casing 400. In particular, the body 402 includes grooves 402H and 402I, implemented in FIGS. 2A and 2B as substantially annular grooves. As indicated in those figures, the groove 402H receives a snap ring 414, while the groove 402I receives a wave spring 416. The relative positions of the snap ring 414 and wave spring 416 may be reversed however, so that the snap ring 414 resides in groove 402I while the wave spring 416 resides in groove 402H. In the illustrated embodiment, the snap ring 414 is positioned so that an axial force exerted by the wave spring 416 acts on the motor so as to maintain the motor 304 in contact with the snap ring 414. In this way, axial motion of the motor 304 within the body 402 is substantially prevented. It should be noted that structures with functionality comparable to that implemented by the snap ring 414 and wave spring 416 may alternatively be employed.

It was noted earlier herein that the body 402 cooperates with the first end cover 404 and second end cover 406 to facilitate the hermetic sealing of the motor 304 and impeller 306 within the cavity 408. Directing renewed attention now to FIGS. 2A and 2B, further details are provided concerning the configuration of the exemplary first end cover 404 and second end cover 406.

In the illustrated embodiment, the first end cover 404 is generally in the form of a plate that defines a plurality of bolt holes 404A distributed about the circumference of the first end cover 404. Each of the bolt holes 404A is positioned to align with a corresponding tapped hole 402D of the first end 402B of the body 402, and is configured to receive a corresponding bolt 418, or other suitable fastener. As a result, the first end cover 404 can be readily attached to, and removed from, the body 402.

The exemplary first end cover 404 further includes a second fluid interface 404B. In general, the second fluid interface 404B is represented schematically at 202B in FIG. 1 and is configured and arranged to permit coolant from the heat exchanger 204 (see FIG. 1) to flow through the first end cover 404 and into the impeller 306 of the coolant pump 300. In the illustrated embodiment, the second fluid interface 404B takes the form of a threaded connection aligned with an opening defined in the first end cover 404. The threaded configuration permits attachment of hoses or other system components. The second fluid interface 404B can alternatively be implemented, for example, as a simple pipe stub for use with a hose and hose clamps, or as a quick-disconnect connection.

Finally, the first end cover 404, as well as the second end cover 406 discussed below, can be constructed of a variety of materials, one example of which is aluminum. However, any other material(s) suitable for the intended use of the coolant pump 300 may alternatively be employed.

With continuing reference to FIGS. 2A and 2B, the second end cover 406 is similar in many regards to the first end cover 404. Accordingly, the following discussion will focus primarily on certain differences between the two end covers. In particular, the second end cover 406 includes an electrical interface 406A that generally serves to facilitate electrical communication between the motor 304 and a power source (not shown).

In the illustrated embodiment, the electrical interface 406A takes the form of a hermetically sealed electric wiring harness configured and arranged to interface with the electrical connection 304B of the motor 304. However, aspects of the electrical interface 406A of the second end cover 406 may be changed as necessary to suit the requirements of a particular application and/or motor. For example, it was noted earlier herein that some embodiments of the invention employ a dry stator motor. In such applications, the electrical interface need not be hermetically sealed. In another embodiment, the electrical interface 406A takes the form of one or more electrical contacts in electrical communication with the electrical connection 304A of the motor 304, and extending through the second end cover 406.

Directing attention now to FIGS. 3A and 3B, details are provided concerning an alternative implementation of a coolant pump, generally designated at 500. The embodiment disclosed in FIGS. 3A and 3B is similar in many regards to the coolant pump disclosed in FIGS. 2A and 2B. Accordingly, the following discussion will focus primarily on selected differences between the two exemplary embodiments.

In the illustrated embodiment, the casing 502 includes a first end cover 504 removably attached to a body 506, where the first end cover 504 takes the form of an impeller housing within which an impeller 508 is substantially disposed. Similar to the exemplary embodiment disclosed in FIGS. 2A and 2B, the casing 502 includes a first fluid interface 504A and a second fluid interface 504B. The coolant pump 500 differs however from that embodiment in that the first fluid interface 504A is an element of the first end cover 504, rather than being, an element of the body 506. Among other things, this alternative arrangement may simplify the construction of the casing 502 in some instances.

In the arrangement disclosed in FIGS. 3A and 3B, coolant is discharged from the coolant pump 500 by way of the first fluid interface 504A, and received into the coolant pump 500 by way of the second fluid interface 504B. As discussed below, the aforementioned exemplary configuration of the first end cover 504 provides various benefits.

For example, if the impeller 508 requires repair or replacement, removal of the impeller 508 can be readily accomplished by simply removing the first end cover 504. No further disassembly of the casing 502 would typically be required. Among other things, this arrangement enables ready modification of the design of the coolant pump 500, since one impeller can be replaced with another impeller having the desired performance characteristics.

As another example, the second fluid interface 504B can be positioned as necessary to suit the placement, configuration and orientation of other components, such as hoses for example, of the cooling system in which the coolant pump 500 is employed. In particular, the first end cover 504 is simply rotated, relative to the casing 502, until the second fluid interface 504B is in a desired radial position. Once the second fluid interface 504B is thus positioned, the first end cover 504 is then attached to the casing 502. Changes to the position of the second fluid interface 504B can be readily achieved by detaching the first end cover 504 and rotating the first end cover 504 until the second fluid interface 504B is in the new position.

III. Operational Considerations

With continuing attention to FIGS. 2A through 3B, details are now provided concerning various operational aspects of a system such as is exemplified in FIG. 1. More particularly, heat generated as a result of x-ray tube operations is transferred to coolant passing through the x-ray tube housing 102. The heated coolant then exits the x-ray tube housing 102 and enters the coolant pump 300/500. The hermetic design of the coolant pump 300/500 casing ensures that little or no coolant leakage occurs. The pressure of the heated coolant is increased by the coolant pump 300/500 and the coolant then exits the coolant pump 300/500 and enters the heat exchanger 204 where heat is removed from the coolant. After this heat removal process, the coolant is then returned from the heat exchanger 204 to the x-ray tube housing 102 to repeat the heat transfer

The described embodiments are to be considered in all respects only as exemplary and not restrictive. The scope of the invention is thus indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A casing for housing a pump, comprising:

a body having first and second ends;

a first end cover including a first fluid interface, the first end cover being removably attachable to the first end of the body, and a second fluid interface being included in one of: the body; or, the first end cover; and

a second end cover including an electrical interface, the second end cover being removably attachable to the second end of the body, and the second end cover cooperating with the first end cover and the body to substantially define a cavity when the first and second end covers are attached to the body, the cavity being in fluid communication with the first and second fluid interfaces.

2. The casing as recited in claim 1, wherein the body substantially comprises a single piece construction.

3. The casing as recited in claim 1, wherein the body is formed by one of: extrusion; casting; or, molding.

4. The casing as recited in claim 1, wherein the casing substantially comprises aluminum.

5. The casing as recited in claim 1, wherein the electrical interface comprises a hermetically sealed wiring harness.

6. The casing as recited in claim 1, wherein the body includes an integral mounting base.

7. The casing as recited in claim 1, wherein the body includes a plurality of glands, each of which is configured to at least partially receive a corresponding sealing element.

8. The casing as recited in claim 1, further comprising:

a first sealing element interposed between the body and the first end cover; and

a second sealing element interposed between the body and the second end cover.

9. The casing as recited in claim 1, further comprising a snap ring and a wave spring, each of which is configured to be positioned within a respective groove defined by the body.

10. A pump, comprising:

a casing that substantially defines a cavity, the casing including a first fluid interface and comprising: an extrusion body with first and second ends; first and second sealing elements; a first end cover including a second fluid interface, the first end cover being removably attachable to the first end of the extrusion body and cooperating with the first sealing element to at least partially seal the casing; and a second end cover including an electrical interface, the second end cover being removably attachable to the second end of the extrusion body and cooperating with the second sealing element to at least partially seal the casing;

an impeller; and

a motor including a shaft to which the impeller is attached, at least the motor being disposed within the casing, and the motor being in electrical communication with the electrical interface and in fluid communication with the cavity and first and second fluid interfaces.

11. The pump as recited in claim 10, wherein the pump comprises a centrifugal pump.

12. The pump as recited in claim 10, wherein the extrusion body substantially comprises a single piece construction.

13. The pump as recited in claim 10, wherein the motor is a submerged stator/rotor type.

14. The pump as recited in claim 10, wherein the first fluid interface comprises an element of the first end cover, the first fluid interface being in fluid communication with the second fluid interface and with the cavity.

15. The pump as recited in claim 10, wherein the first fluid interface comprises an element of the extrusion body, the first fluid interface being in fluid communication with the second fluid interface and with the cavity.

16. The pump as recited in claim 10, wherein the first end cover substantially encloses the impeller.

17. The pump as recited in claim 10, wherein the pump further comprises a snap ring and a wave spring, each of which is configured to be positioned within a respective groove defined by the body so that both the wave spring and the snap ring contact the motor.

18. A cooling system suitable for use in connection with an x-ray device, comprising:

a heat exchanger; and

a pump configured for fluid communication with the heat exchanger, and comprising: a casing that substantially defines a cavity, the casing including a first fluid interface and comprising: an extrusion body with first and second ends; first and second sealing elements; a first end cover including a second fluid interface, the first end cover being removably attachable to the first end of the extrusion body and cooperating with the first sealing element to at least partially seal the casing; and a second end cover including an electrical interface, the second end cover being removably attachable to the second end of the extrusion body and cooperating with the second sealing element to at least partially seal the casing; an impeller; and a motor including a shaft to which the impeller is attached, at least the motor being disposed within the casing, and the motor being in electrical communication with the electrical interface and in fluid communication with the first and second fluid interfaces and the cavity.

19. The cooling system as recited in claim 17, wherein the extrusion body substantially comprises a single piece construction.

20. The cooling system as recited in claim 17, wherein the motor is a submerged stator/rotor type.