Liquid pump

Abstract

The utility model discloses a liquid pump which comprises a stator, a rotor assembly located in the center of the stator and a pump liquid cavity used for containing an impeller on the axial end side of the rotor assembly to work, a heat dissipation cavity used for conducting heat dissipation on the stator is formed in the radial outer side of the stator, and a plurality of liquid holes distributed along the Archimedes spiral line are formed in the cavity wall of the pump liquid cavity. And the liquid pumping cavity is communicated with the heat dissipation cavity through the liquid hole. According to the liquid pump, under the action of pressure difference, liquid in the liquid pumping cavity can flow into the heat dissipation cavity from the liquid hole for heat exchange, the liquid subjected to heat exchange flows back to the liquid pumping cavity from the heat dissipation cavity through the liquid hole, the liquid is made to circulate from high pressure to low pressure so as to take away heat of the heat dissipation cavity, liquid flow self-circulation is achieved, a pipeline structure does not need to be additionally arranged, and the cost is reduced. According to the liquid pump, the size of the liquid pump is reduced, the manufacturing cost is reduced, fluid is accelerated and pressurized through the multiple liquid holes distributed along the Archimedes spiral line, the heat dissipation efficiency of the liquid pump is improved, and therefore the overall performance of a system applying the liquid pump is improved.

Description

Technical Field

[0001] This application relates to the field of liquid pump technology, and specifically to a liquid pump. Background Technology

[0002] Liquid pumps can be used in industrial server liquid cooling systems, refrigeration systems, etc. However, during the operation of liquid pumps, iron losses and copper losses are inevitable. These energy losses mainly manifest as heat. Copper losses are caused by the resistance of the copper coil in the motor part of the liquid pump. The resistance causes energy to be dissipated in the form of heat. Iron losses are caused by the hysteresis phenomenon and eddy current effect generated during the magnetization process of the iron core structure, which also causes electrical energy to be converted into heat energy. If this heat is not effectively dissipated, it will adversely affect the performance and service life of the liquid pump.

[0003] Liquid cooling technology effectively absorbs and transfers the heat generated during the operation of the liquid pump by circulating and cooling the liquid, ensuring that the liquid pump operates stably within the optimal temperature range.

[0004] In the process of developing this application, the inventors discovered at least the following technical problems in the prior art:

[0005] The existing heat dissipation structure of liquid pumps has several limitations and urgently needs to be improved to further enhance heat dissipation efficiency and system performance. Utility Model Content

[0006] In order to effectively overcome the problems existing in the prior art, the main objective of this application is to provide a liquid pump that can improve heat dissipation efficiency.

[0007] To achieve the above objectives, this application specifically adopts the following technical solution:

[0008] A liquid pump includes a stator, a rotor assembly located at the center of the stator, and a pumping chamber for accommodating the operation of an impeller on the axial end side of the rotor assembly. A heat dissipation chamber for dissipating heat from the stator is formed on the radially outer side of the stator. The pumping chamber has a plurality of liquid holes distributed along an Archimedean spiral in its cavity wall. The pumping chamber communicates with the heat dissipation chamber through the liquid holes.

[0009] In some embodiments, the cross-section of the liquid orifice is fan-shaped.

[0010] In some embodiments, the liquid hole is an arc-shaped elongated hole.

[0011] In some embodiments, along the axial direction of the liquid hole, the cross-sectional area of ​​the liquid hole first gradually decreases and then gradually increases.

[0012] In some embodiments, the radial dimensions of the plurality of liquid holes increase sequentially along the rotation direction of the rotor assembly in the cavity wall of the pump liquid chamber.

[0013] In some embodiments, the liquid pump further includes a pump body and a shielding sleeve. The pump body has a stator cavity for accommodating the stator. The shielding sleeve is disposed at the center of the stator, and the shielding sleeve and the inner wall of the stator cavity enclose a rotor cavity. The rotor assembly is disposed within the rotor cavity.

[0014] In some embodiments, the liquid pump further includes a cylindrical shell, and a heat dissipation annular groove is formed on the radially outer side of the pump body. The cylindrical shell is fitted onto the pump body and seals the heat dissipation annular groove, and the groove cavity of the heat dissipation annular groove is the heat dissipation cavity.

[0015] In some embodiments, the liquid pump further includes a first pump cover disposed at one end of the pump body and a second pump cover disposed at the other end of the pump body. The first pump cover and the pump body enclose the pump liquid chamber, and the second pump cover encloses the stator chamber and the rotor chamber respectively with the pump body and the shielding sleeve.

[0016] In some embodiments, the rotor assembly includes a rotor and a shaft. The rotor is disposed within the rotor cavity, and the shaft is rotatably connected to the pump body. One end of the shaft passes through the rotor, and the other end of the shaft passes through the pump liquid cavity and is drivenly connected to an impeller within the pump liquid cavity. The shaft has a protrusion. The liquid pump also includes a limiter, which is sleeved on the shaft. One end of the rotor abuts against the protrusion, and the other end of the rotor abuts against the limiter.

[0017] In some embodiments, the pump body is provided with an oil injection nozzle and a cable connector, the oil injection nozzle and the cable connector being respectively connected to the stator cavity.

[0018] Compared with the prior art, the liquid pump provided in this application has at least the following beneficial effects:

[0019] The pump liquid chamber of this application has multiple liquid holes distributed along the Archimedean spiral on its cavity wall. The pump liquid chamber is connected to the heat dissipation cavity through the liquid holes, and the pump liquid chamber can form a high-pressure zone and a low-pressure zone. The liquid pressure in the high-pressure zone is greater than the liquid pressure in the low-pressure zone. Since the heat dissipation cavity can connect the high-pressure zone and the low-pressure zone of the pump liquid chamber through the liquid holes, when the liquid pump is working, under the action of pressure difference, the liquid in the pump liquid chamber can flow from the liquid holes into the heat dissipation cavity for heat exchange. After heat exchange, the liquid flows back from the heat dissipation cavity to the pump liquid chamber through the liquid holes, so that the liquid circulates repeatedly in the form of high pressure to low pressure to remove the heat from the heat dissipation cavity. This realizes the self-circulation of liquid flow, reduces the demand for external power source, and eliminates the need to increase the pipeline structure, which is conducive to reducing the size of the liquid pump and reducing manufacturing costs. Furthermore, by guiding, accelerating, and pressurizing the fluid through multiple liquid holes distributed along the Archimedean spiral, the heat dissipation efficiency of the liquid pump is improved, thereby improving the overall performance of the system using the liquid pump. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a liquid pump provided in an embodiment of this application;

[0021] Figure 2 A cross-sectional view of a liquid pump provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the pump body of the liquid pump provided in the embodiments of this application;

[0023] Figure 4 A schematic diagram of the pump body of the liquid pump provided in an embodiment of this application from another perspective;

[0024] Figure 5 This is a schematic diagram of the liquid orifice structure of a liquid pump provided in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the structure of the first embodiment of the liquid pump's liquid orifice provided in this application.

[0026] Figure 7 This is a schematic diagram of the structure of the second embodiment of the liquid pump's liquid orifice provided in this application.

[0027] Figure label:

[0028] 1. Stator; 2. Impeller; 3. Rotor assembly; 31. Rotor; 32. Shaft; 320. Protrusion; 4. Pump liquid chamber; 41. Liquid hole; 42. Flow channel; 5. Heat dissipation chamber; 6. Guide vane; 7. Pump body; 71. Liquid outlet; 72. Heat dissipation annular groove; 8. Shell; 9. First pump cover; 91. Liquid inlet; 10. Second pump cover; 11. Stator cavity; 110. Annular protrusion; 12. Rotor cavity; 13. Oil injector; 14. Cable connector; 15. First fin; 16. Second fin; 17. Limiter; 18. Mechanical shaft seal; 19. Sealing ring; 20. Shielding sleeve; 21. Stud; 22. Bearing; 100. Liquid pump. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more, and the term "various types" refers to two or more; the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0032] Liquid pumps typically employ liquid cooling for heat dissipation. Some liquid pumps feature a heat dissipation chamber on the radially outer side of the stator, allowing heat exchange with the stator. The inlet of this chamber is connected to the high-pressure zone of the pump's liquid chamber, while the outlet is connected via piping to the low-pressure zone. Heat dissipation is achieved through liquid circulation between the heat dissipation chamber and the pump's liquid chamber. However, this piping connection method is more expensive to manufacture and increases liquid flow resistance, thus reducing the pump's heat dissipation efficiency and resulting in relatively poor heat dissipation performance.

[0033] Therefore, this application provides a liquid pump to improve the above-mentioned problems.

[0034] Reference Figures 1-3 As shown, Figure 1 This is a schematic diagram of the structure of a liquid pump provided in an embodiment of this application. Figure 2 This is a cross-sectional view of a liquid pump provided in an embodiment of this application. Figure 3 This is a schematic diagram of the pump body of the liquid pump provided in this embodiment. This embodiment discloses a liquid pump 100, which includes a stator 1, a rotor assembly 3 located at the center of the stator 1, and a pump liquid chamber 4 for accommodating the impeller 2 on the axial end side of the rotor assembly 3. A heat dissipation chamber 5 is formed on the radially outer side of the stator 1 for dissipating heat from the outside of the stator 1, that is, the heat of the stator 1 can be transferred from the stator 1 to the cavity wall of the heat dissipation chamber 5 and then to the heat dissipation chamber 5. Since there is liquid in the heat dissipation chamber 5, the heat transferred to the heat dissipation chamber 5 will be absorbed by the liquid.

[0035] Multiple liquid holes 41, spaced along an Archimedean spiral, are provided on the edge of the pump fluid chamber 4. This allows for the formation of a high-pressure zone and a low-pressure zone within the pump fluid chamber 4. The liquid pressure in the high-pressure zone is greater than that in the low-pressure zone. The pump fluid chamber 4 is connected to the heat dissipation chamber 5 through these multiple liquid holes 41; that is, the heat dissipation chamber 5 connects the high-pressure zone and the low-pressure zone of the pump fluid chamber 4 through the liquid holes 41. The axial direction is... Figure 2 The X direction and the radial direction are... Figure 2 The Y direction in the middle. It can be understood that the pump liquid chamber 4 has a liquid inlet (or inlet) and a liquid outlet (or outlet) to allow external liquid to flow into the pump liquid chamber 4 and to allow liquid to flow out of the pump liquid chamber 4, so as to realize liquid transportation.

[0036] It should be noted that the pressure difference between the high-pressure zone and the low-pressure zone is formed by the centrifugal force generated by the rotation of impeller 2. The principle of pressure difference refers to the difference in water pressure along the flow direction. When impeller 2 rotates, the rotational motion causes water flow. The area near the center line of impeller 2 is subject to low water pressure, while the area near the outer diameter of impeller 2 is affected by the water pressure of the high-pressure turbulent area, resulting in a pressure difference. Furthermore, the interaction between impeller 2 and the inner wall of pump liquid chamber 4 generates a vortex effect, making the liquid flow in the entire pump liquid chamber 4 consistent with the characteristics of the centrifugal force of impeller 2 rotation. This allows the liquid to flow from the high-pressure zone to the low-pressure zone and flow into and out of the heat dissipation chamber 5, achieving reciprocating flow, and finally being discharged from the outlet. The specific positional relationship between the high-pressure zone and the low-pressure zone can be selected based on the actual structure of the impeller 2 and the pump liquid chamber 4. For example, in the pumping form of axial liquid inlet and radial liquid outlet, the area near the axis is the low-pressure zone, while the area away from the axis is the high-pressure zone. In the pumping form of radial liquid inlet and axial liquid outlet, the low-pressure zone and the high-pressure zone are opposite to the above. Generally speaking, the area near the liquid inlet is the low-pressure zone, while the area near the liquid outlet is the high-pressure zone.

[0037] It should be noted that the number of impellers 2 can be set according to the required flow rate of liquid cooling. It can be one layer of impellers 2 or multiple layers of impellers 2, which is not limited here.

[0038] In this embodiment, along the axial direction of the liquid hole 41, the cross-sectional area of ​​the liquid hole 41 first gradually decreases and then gradually increases, that is, the liquid hole 41 is hourglass-shaped, so as to accelerate the flow rate of the fluid from the pump liquid chamber 4 to the heat dissipation chamber 5 and the flow rate of the fluid from the heat dissipation chamber 5 to the pump liquid chamber 4, thereby further improving the heat dissipation efficiency. The minimum cross-sectional area of ​​the liquid hole 41 can be set as needed, as long as it does not affect the liquid flow.

[0039] In this embodiment, the liquid hole 41 is a circular hole. A circular hole can reduce the resistance to fluid flow, making the fluid flow smoother and thus reducing energy loss. It is understood that in other embodiments, the liquid hole 41 can also be a square hole or a polygonal hole.

[0040] In this embodiment, the liquid pump 100 also includes a guide vane 6, which is disposed at the outlet of the impeller 2 and is used to guide the flow of liquid. By combining the dynamic movement of the impeller 2 with the precise guidance of the guide vane 6, the maximum energy efficiency of the liquid pump 100 is effectively ensured, thereby improving the efficiency of the liquid pump 100.

[0041] In this embodiment, the pump fluid chamber 4 has multiple liquid holes 41 distributed along an Archimedean spiral on its cavity wall. The pump fluid chamber 4 is connected to the heat dissipation chamber 5 through these liquid holes 41. The pump fluid chamber 4 can form a high-pressure zone and a low-pressure zone, with the liquid pressure in the high-pressure zone being greater than that in the low-pressure zone. Since the heat dissipation chamber 5 can connect the high-pressure zone and the low-pressure zone of the pump fluid chamber 4 through the liquid holes 41, when the liquid pump is working, under the action of the pressure difference, the liquid in the pump fluid chamber 4 can flow into the heat dissipation chamber 5 through the liquid holes 41 for heat exchange. After heat exchange, the liquid flows through the liquid... The liquid flows from the heat dissipation chamber 5 back to the pump liquid chamber 4 through the hole 41, causing the liquid to circulate repeatedly from high pressure to low pressure to remove the heat from the heat dissipation chamber 5. This achieves self-circulation of the liquid flow, reduces the need for an external power source, and eliminates the need for additional piping structures. This helps to reduce the size of the liquid pump 100 and lower manufacturing costs. Furthermore, the liquid flow is guided, accelerated, and pressurized by multiple liquid holes 41 distributed along the Archimedean spiral, which improves the heat dissipation efficiency of the liquid pump 100 and thus enhances the overall performance of the system using the liquid pump 100.

[0042] Reference Figures 3-5 As shown, Figure 4 This is a structural schematic diagram of the pump body of the liquid pump provided in an embodiment of this application from another perspective. Figure 5 This is a schematic diagram of the liquid orifice structure of the liquid pump provided in this application embodiment. The radial dimensions of the multiple liquid orifices 41 increase sequentially along the rotation direction of the rotor assembly 3 (i.e., the forward rotation direction of the liquid pump 100) on the wall of the pump liquid chamber 4, which promotes the formation of vortices and increases the liquid flow rate. Through multiple liquid orifices 41 distributed along the Archimedean spiral and with gradually increasing radial dimensions, a more uniform liquid circulation and heat distribution are achieved in the heat dissipation chamber 5, thereby making the liquid flow into and out of the heat dissipation chamber 5 more uniform, further improving the heat dissipation efficiency of the liquid pump 100.

[0043] In this embodiment, the inner wall of the pump liquid chamber 4 is formed with a flow channel 42 extending along the Archimedean spiral. In the radial direction, the flow channel 42 is located between the inner wall of the pump liquid chamber 4 and the liquid hole 41. The axial direction of the flow channel 42 is consistent with the axial direction of the impeller 2. By utilizing the characteristics of the Archimedean spiral, the fluid is guided, accelerated, and pressurized, converting the kinetic energy of the liquid at the outlet of the impeller 2 into pressure energy, so that the liquid is accelerated to flow into and out of the heat dissipation chamber 5, further improving the heat dissipation efficiency of the liquid pump 100.

[0044] Reference Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of the first embodiment of the liquid pump's liquid orifice provided in this application. In some embodiments, the cross-section of the liquid orifice 41 is fan-shaped. The fan-shaped orifice allows the fluid to form an arc-shaped flow velocity when passing through. This design can increase the fluid flow area, thereby increasing the fluid flow rate. Moreover, the fan-shaped orifice can effectively reduce the resistance to fluid flow, making the fluid flow more smoothly and thus improving heat dissipation efficiency.

[0045] Reference Figure 7 As shown, Figure 7 This is a schematic diagram of the structure of the liquid orifice of the liquid pump provided in the embodiments of this application. In some embodiments, the liquid orifice 41 is an arc-shaped elongated hole, which is convenient for processing and increases the flow area of ​​the fluid, thereby providing a larger flow rate under the same pressure, improving heat exchange efficiency. Furthermore, the arc-shaped design reduces the resistance of the fluid during the flow process, allowing the fluid to pass through the liquid orifice 41 more smoothly, thereby improving the flow efficiency of the fluid.

[0046] Reference Figure 1 and Figure 2As shown, the liquid pump 100 includes a pump body 7, a cylindrical shell 8, a shielding sleeve 20, a first pump cover 9 covering one end of the pump body 7, and a second pump cover 10 covering the other end of the pump body 7. The pump body 7 has a liquid outlet 71 communicating with the pump liquid chamber 4 and a stator cavity 11 for accommodating the stator 1, and a heat dissipation annular groove 72 is formed on the radially outer side of the pump body 7. The cylindrical shell 8 is fitted onto the pump body 7 and seals the heat dissipation annular groove 72, and the groove cavity of the heat dissipation annular groove 72 is a heat dissipation cavity 5. The stator cavity 11 has an annular protrusion 110 on its cavity wall. A shielding sleeve 20 is fitted onto the annular protrusion 110 and located at the center of the stator 1, so that the shielding sleeve 20 and the inner wall of the stator cavity 11 enclose the rotor cavity 12. The rotor assembly 3 is disposed in the rotor cavity 12. The shielding sleeve 20 ensures the sealing of the rotor assembly 3, thereby reducing the contact between the coolant and the rotor assembly 3 and the resulting corrosion of the rotor assembly 3. This effectively ensures the normal operation of the rotor assembly 3 and extends its service life. The shielding sleeve 20 can also absorb the heat generated by the rotor assembly 3 during operation and transfer the heat to the coolant, thus playing a role in heat dissipation. The first pump cover 9 is connected to the pump body 7 by a stud 21 and encloses the pump body 7 to form a pump fluid cavity 4. The first pump cover 9 has an inlet 91 in the axial center that communicates with the pump fluid cavity 4. The second pump cover 10 is connected to the pump body 7 by a stud 21 and encloses the pump body 7 and the shielding sleeve 20 to form the stator cavity 11 and the rotor cavity 12, respectively.

[0047] In this embodiment, the inlet 91 is located at the radial center of the impeller 2, and the outlet 71 is located at the radial outer end of the impeller 2, so that the fluid is output radially outward. The radial output flow rate is large and can withstand high pressure. It can be understood that in other embodiments, it can also be a pumping form with an axial inlet 91 and an axial outlet 71; or a pumping form with a radial inlet 91 and a radial outlet 71; or a pumping form with a radial inlet 91 and an axial outlet 71.

[0048] In this embodiment, the heat dissipation cavity 5 is an annular cavity surrounding the stator 1, so as to effectively ensure that there is a larger heat exchange area between the heat dissipation cavity 5 and the stator 1, thereby improving the heat dissipation efficiency. It can be understood that in other embodiments, the heat dissipation cavity 5 may also be a strip cavity extending along the axial direction. Specifically, there may be only one strip cavity or multiple strip cavities arranged in parallel circumferentially.

[0049] In this embodiment, the pump body 7 is also provided with an oil inlet 13 and a cable connector 14. The oil inlet 13 and the cable connector 14 are respectively connected to the stator cavity 11. Immersion coolant (insulating coolant) is injected through the oil inlet 13. The coolant absorbs the heat generated during the operation of the stator 1 and rotor assembly 3, and then conducts it to the heat dissipation cavity 5. The liquid in the heat dissipation cavity 5 carries away the heat, thereby maintaining the temperature of the stator 1 and rotor assembly 3 within a safe operating range. The cable connector 14 is used for cable insertion to energize the stator 1 and transmit external control signals to the stator 1 inside the pump body 7. This allows the control components to be located on the outside of the pump body 7 for convenient heat dissipation and maintenance.

[0050] Continue to refer to Figure 2 As shown, the rotor assembly 3 includes a rotor 31 and a shaft 32, with the rotor 31 housed within the rotor cavity 12. The shaft 32 is rotatably connected to the pump body 7 via a bearing 22, which reduces friction between the shaft 32 and the pump body 7 to ensure smooth operation of the shaft 32. One end of the shaft 32 passes through the rotor 31, and the other end passes through the pump liquid cavity 4 and is connected to the impeller 2 within the pump liquid cavity 4. The shaft 32 has a protrusion 320. The liquid pump 100 also includes a limiter 17, which is fitted onto the shaft 32 and located within the rotor cavity 12. One end of the rotor 31 abuts against the protrusion 320, and the other end of the rotor 31 abuts against the limiter 17. The protrusion 320 and the limiter 17 limit the rotor 31 axially, reducing axial displacement of the rotor 31 during rotation and effectively ensuring stable operation of the liquid pump 100. Understandably, the rotor cavity 12 is filled with refrigerant oil, which serves two purposes: firstly, to ensure the lubrication of the rotor assembly 3, and secondly, to transfer heat to the shielding sleeve 20 through the refrigerant oil.

[0051] In this embodiment, the liquid pump 100 also includes a mechanical shaft seal 18, which is sleeved on the rotating shaft 32 and abuts against the pump body 7 to ensure the sealing between the rotating shaft 32 and the pump body 7 when the rotating shaft 32 passes through the pump body 7, thereby ensuring the sealing between the pump liquid chamber 4 and the rotor chamber 12.

[0052] Reference Figure 2As shown, the liquid pump 100 also includes multiple sealing rings 19. The first pump cover 9 has a circumferentially extending groove, and the sealing ring 19 is disposed in the groove and abuts against the inner wall of the pump body 7 to ensure the sealing of the connection between the first pump cover 9 and the pump body 7. The outer wall surface of the annular protrusion 110 has a groove, and the sealing ring 19 is disposed in the groove and abuts against the inner wall of the shielding sleeve 20 to ensure the sealing of the connection between the shielding sleeve 20 and the annular protrusion 110. The second pump cover 10 has a circumferentially extending groove, and the sealing ring 19 is disposed in the groove and abuts against the inner wall of the pump body 7 to ensure the sealing of the connection between the second pump cover 10 and the pump body 7. Furthermore, the second pump cover 10 has a boss corresponding to the annular protrusion 110, and the outer wall surface of the boss has a groove, and the sealing ring 19 is disposed in the groove and abuts against the inner wall of the shielding sleeve 20 to ensure the sealing of the rotor cavity 12.

[0053] Reference Figure 3 As shown, the bottom wall of the heat dissipation annular groove 72 is provided with multiple first fins 15 spaced apart. The bottom wall of the heat dissipation annular groove 72 is the wall surface of the heat dissipation annular groove 72 in the radial direction near the stator 1. The inner wall surface of the stator cavity 11 is provided with multiple second fins 16 spaced apart, so as to increase the heat exchange area by means of the first fins 15 and the second fins 16. In this way, the heat dissipation efficiency is improved by utilizing the synergistic effect of the fin heat dissipation structure and liquid cooling. The fins can also play a role in turbulence, thereby improving the heat exchange capacity and improving the heat dissipation efficiency. The multiple first fins 15 and the multiple second fins 16 can be arranged at equal intervals or at unequal intervals.

[0054] In this embodiment, the heights of the multiple first fins 15 are different. Fins of unequal height can guide fluid flow more effectively, thereby increasing the contact area and time between the fluid and the fin surface and improving heat exchange efficiency. It is understood that in other embodiments, the heights of the multiple first fins 15 may also be the same.

[0055] In this embodiment, each first fin 15 is inclined, that is, the angle between the first fin 15 and the bottom wall of the pump liquid chamber 4 is not equal to 90°, so that the multiple first fins 15 are arranged in a spiral shape. The spiral shape is intended to enhance the vortex motion of the fluid, promote turbulence, thereby further breaking the boundary layer and increasing the heat transfer coefficient. Moreover, the spiral fins can provide more surface area in a limited space and guide the fluid to move along a specific path, thereby achieving more efficient heat exchange in a smaller space and further improving heat dissipation efficiency. It can be understood that in other embodiments, the angle between the first fin 15 and the bottom wall of the pump liquid chamber 4 can also be equal to 90°.

[0056] The liquid pump 100 also includes a fan impeller and a guide shroud. The guide shroud is located on the side of the second pump cover 10 facing away from the pump body 7, and the guide shroud and the second pump cover 10 enclose a space for the fan impeller to work. One end of the rotating shaft 32 passes through the second pump cover 10 and extends into the space. The fan impeller is sleeved on the rotating shaft 32 and located in the space. When the rotating shaft 32 rotates, it can drive the fan impeller to rotate together, thereby dissipating the heat generated by the stator 1 and the rotor 31 during operation, and further improving the heat dissipation efficiency.

[0057] The outer surface of the shell 8 is provided with multiple third fins that are spaced apart along the circumference of the shell 8, and the second pump cover 10 is provided with multiple fourth fins on the side facing away from the pump body 7, so as to further increase the heat exchange area and thus further improve the heat exchange efficiency.

[0058] In specific application scenarios, during operation, the inlet 91 of the liquid pump 100 is connected to a water source (fluid source), and the cable is connected to the stator 1 through the cable connector 14, converting electrical energy into mechanical energy. The stator 1 drives the rotor 31 and the shaft 32 to rotate, thereby driving the impeller 2 to rotate. The centrifugal force of the rotating impeller 2 generates a vortex effect, drawing water into the pump liquid chamber 4 through the inlet 91. Under the action of pressure difference, a portion of the water in the pump liquid chamber 4 flows into and out of the heat dissipation chamber 5 through multiple liquid holes 41 for circulation and heat dissipation, realizing liquid self-circulation. The heat discharged from the heat dissipation chamber 5 can be discharged from the outlet 71 of the pump liquid chamber 4, thereby achieving continuous heat dissipation, meeting the high heat dissipation rate requirements of the stator 1 and the rotor 31, thereby improving the service life of the liquid pump and effectively ensuring the reliability of the server cooling system.

[0059] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A liquid pump, characterized in that, The device includes a stator, a rotor assembly located at the center of the stator, and a pump fluid chamber for accommodating the impeller working on the axial end side of the rotor assembly. A heat dissipation chamber for dissipating heat from the stator is formed on the radially outer side of the stator. The pump fluid chamber has a plurality of liquid holes distributed along the Archimedean spiral in its cavity wall. The pump fluid chamber communicates with the heat dissipation chamber through the liquid holes.

2. The liquid pump according to claim 1, characterized in that, The cross-section of the liquid hole is fan-shaped.

3. The liquid pump according to claim 1, characterized in that, The liquid hole is an arc-shaped elongated hole.

4. The liquid pump according to claim 1, characterized in that, Along the axial direction of the liquid hole, the cross-sectional area of ​​the liquid hole first gradually decreases and then gradually increases.

5. The liquid pump according to claim 1, characterized in that, The radial dimensions of the plurality of liquid holes increase sequentially along the rotation direction of the rotor assembly in the cavity wall of the pump liquid chamber.

6. The liquid pump according to any one of claims 1 to 5, characterized in that, The liquid pump also includes a pump body and a shielding sleeve. The pump body has a stator cavity for accommodating the stator. The shielding sleeve is disposed at the center of the stator, and the shielding sleeve and the inner wall of the stator cavity enclose a rotor cavity. The rotor assembly is disposed in the rotor cavity.

7. The liquid pump according to claim 6, characterized in that, The liquid pump also includes a cylindrical shell, and a heat dissipation annular groove is provided on the radially outer side of the pump body. The cylindrical shell is fitted onto the pump body and seals the heat dissipation annular groove, and the groove cavity of the heat dissipation annular groove is the heat dissipation cavity.

8. The liquid pump according to claim 6, characterized in that, The liquid pump further includes a first pump cover at one end of the pump body and a second pump cover at the other end of the pump body. The first pump cover and the pump body enclose the pump liquid chamber, and the second pump cover encloses the stator chamber and the rotor chamber respectively with the pump body and the shielding sleeve.

9. The liquid pump according to claim 6, characterized in that, The rotor assembly includes a rotor and a shaft. The rotor is disposed within the rotor cavity. The shaft is rotatably connected to the pump body, with one end of the shaft passing through the rotor and the other end passing through the pump liquid cavity and being drivenly connected to the impeller within the pump liquid cavity. The shaft has a protrusion. The liquid pump also includes a limiter, which is sleeved on the shaft. One end of the rotor abuts against the protrusion, and the other end of the rotor abuts against the limiter.

10. The liquid pump according to claim 6, characterized in that, The pump body is equipped with an oil injection nozzle and a cable connector, and the oil injection nozzle and the cable connector are respectively connected to the stator cavity.

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