Static seal liquid cooling pump

Abstract

The utility model relates to a static seal liquid cooling pump which comprises a pump shell and an impeller. The pump shell comprises a tube shell and a control shell, a driving motor is connected between the tube shell and the control shell, the driving motor comprises a brushless direct current motor, and the impeller is installed on an output shaft of the brushless direct current motor; the brushless direct current motor comprises a permanent magnet rotor, the output shaft and the permanent magnet rotor are integrally formed, and bearings are installed in the axial direction of the permanent magnet rotor at intervals. The brushless direct current motor comprises a machine shell, and a plurality of sealing rings are arranged between the machine shell and the pump shell. According to the liquid cooling pump, the sealing performance and reliability of the liquid cooling pump can be guaranteed in a highly integrated installation mode, the installation size is reduced, and the stable and reliable degree of operation is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of liquid cooling systems, and more particularly, to a static-sealed liquid cooling pump. Background Art

[0002] For the new generation of data center anhydrous liquid cooling system technology, fluorinated liquid is used to replace the traditional water cooling form for cooling. Due to the volatile characteristics of fluorinated liquid, combined with the characteristics of long service life, high system efficiency, and small cabinet space of the liquid cooling system, higher requirements are imposed on the sealing performance, reliability, space size, and energy saving of the pump in the anhydrous coolant cooling unit.

[0003] How to ensure zero leakage of fluorinated liquid, improve system reliability, reduce installation space size, and lower system power consumption are urgent problems to be solved. Utility Model Content

[0004] The purpose of the present application is to provide a static-sealed liquid cooling pump, which can ensure the sealing performance and reliability of the liquid cooling pump in the form of highly integrated installation, reduce the installation size, and enhance the stable and reliable operation degree.

[0005] To achieve the above purpose, the present utility model provides a static-sealed liquid cooling pump, including: a pump housing, and an impeller;

[0006] The pump housing includes a pipe housing and a control housing, a driving motor is connected between the pipe housing and the control housing, the driving motor includes a brushless DC motor, and the impeller is installed on the output shaft of the brushless DC motor;

[0007] The brushless DC motor includes a permanent magnet rotor, the output shaft is integrally formed with the permanent magnet rotor, and bearings are installed at intervals in the axial direction of the permanent magnet rotor;

[0008] The brushless DC motor includes a motor housing, and multiple sealing rings are arranged between the motor housing and the pump housing.

[0009] In an alternative embodiment, the pump housing includes a liquid cooling pump inlet located at the center, and an outlet pump pipe arranged on the side of the liquid cooling pump inlet, and a liquid cooling pump outlet is connected to the outlet pump pipe.

[0010] In an alternative embodiment, the outlet pump pipe is arranged in the tangential direction of the pump housing, and the axis of the liquid cooling pump outlet coincides with the axis of the outlet pump pipe.

[0011] In an alternative embodiment, the bearings include a first bearing located in front of the permanent magnet rotor and a second bearing located behind the permanent magnet rotor. Both the first bearing and the second bearing are ceramic bearings, and the size of the first bearing is larger than the size of the second bearing.

[0012] In an alternative embodiment, the brushless DC motor includes a stator, and the interior of the housing is filled with a front thermal pad, which is filled in the gap between the first bearing, the stator, and the pump housing;

[0013] A rear thermal pad is filled between the second bearing, the stator, and the control housing. The rear thermal pad includes an integrally structured thermal conductive ring wall and a thermal conductive flat wall. The thermal conductive ring wall is disposed between the second bearing and the stator, and the thermal conductive flat wall is attached to the control housing.

[0014] In an alternative embodiment, an elastic wave spring is disposed between the thermal conductive flat wall and the second bearing, and the elastic wave spring is attached to the outer ring side wall of the second bearing.

[0015] In an alternative embodiment, a bearing end cover is provided at the front end of the first bearing. The bearing end cover is disposed between the tube housing and the first bearing. An adjusting pad is disposed between the first bearing and the impeller. The bearing end cover is press-fitted on the outer ring side wall of the first bearing, and the adjusting pad is press-fitted on the inner ring side wall of the first bearing.

[0016] In an alternative embodiment, the sealing ring includes a first sealing ring and a second sealing ring. The first sealing ring is disposed at the joint between the tube housing and the housing, and the second sealing ring is disposed at the joint between the housing and the control housing.

[0017] In an alternative embodiment, a circuit board is installed inside the control housing, and a connector is installed on the outer side wall of the control housing. The connector is electrically connected to the circuit board.

[0018] In an alternative embodiment, a rear cover is connected to the tail of the control housing, and a third sealing ring is installed at the annular joint between the rear cover and the control housing.

[0019] By arranging the brushless DC motor between the tube housing and the control housing, the equipment structure can be simplified, the overall volume of the liquid cooling pump can be reduced, and the system power consumption can be reduced through the high efficiency of the brushless DC motor.

[0020] The impeller is installed on a rotating component in which the permanent magnet rotor and the output shaft are integrally formed, which can enhance the integrated compactness of the component structure and ensure the stable and reliable operation of the liquid cooling plate in the form of reducing the transmission connection.

[0021] By arranging bearings axially spaced on the permanent magnet rotor, the reliable operation of the rotating component can be ensured. Combining with the setting form of ceramic bearings, the service life of the bearings can be extended.

[0022] A multi-channel sealing ring is provided between the housing of the brushless DC motor and the pump housing, which can effectively ensure the sealing performance and reliability of the liquid cooling pump and achieve zero leakage of the fluorinated liquid.

[0023] Other features and advantages of the present application will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic internal structure diagram of the static-sealed liquid cooling pump in the present application;

[0026] Figure 2 It is a schematic side view structure diagram of the static-sealed liquid cooling pump in the present application.

[0027] ICON:

[0028] 1 - Pump housing; 2 - Impeller; 3 - Shaft end nut; 4 - Adjusting pad; 5 - First sealing ring; 6 - First bearing; 7 - Second bearing; 8 - Motor; 9 - Bearing end cover; 10 - Elastic wave spring; 11 - Key pin; 12 - Rear heat-conducting pad; 13 - Control housing; 14 - Rear cover; 15 - Third sealing ring; 16 - First connector; 17 - Second connector; 18 - Circuit board; 19 - Countersunk head screw; 20 - Cylindrical head screw; 21 - Pan head screw; 22 - Second sealing ring; 23 - Front heat-conducting pad; 24 - Liquid cooling pump inlet; 25 - Liquid cooling pump outlet; 26 - Outlet pump pipe. SPECIFIC IMPLEMENTATION MANNER

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] The static-sealed liquid-cooled pump in the present application is mainly applied in the anhydrous cooling system of the new generation data center, corresponding to the transportation of the fluorinated liquid refrigerant that replaces the traditional water cooling.

[0033] Specifically, by highly integrating and installing the structural components of the liquid-cooled pump, setting a direct-current powered permanent magnet synchronous motor, and setting a sealing ring between the pump and the motor, the sealing performance and reliability of the liquid-cooled pump are ensured in the form of static sealing, the space volume is reduced, the installation size is decreased, and the stable and reliable operation is enhanced.

[0034] See Figure 1 and in combination with Figure 2 , the static-sealed liquid-cooled pump in the present utility model includes: a pump housing 1, and an impeller 2, and the impeller 2 is installed in the pump housing 1.

[0035] The pump housing 1 includes a pipe housing and a control housing 13. The pipe housing and the control housing 13 are respectively arranged on the front and rear sides in the axial direction of the liquid-cooled pump, and are respectively used for boosting and transporting the refrigerant medium and installing the control components of the motor 8.

[0036] A driving motor 8 is connected between the pipe housing and the control housing 13. The driving motor 8 is used to drive the impeller 2 to rotate for boosting operation. The liquid-cooled pump in the present utility model is specifically in the form of a canned motor pump, reducing the risk of refrigerant medium leakage.

[0037] According to the driving characteristics of the canned motor 8, the driving motor 8 is preferably in the form of a brushless DC motor 8. Further, the brushless DC motor 8 is specifically in the form of a DC-powered permanent magnet synchronous motor 8, which can reduce the volume of the driving motor 8 and indirectly reduce the overall external dimensions of the liquid cooling pump. At the same time, since a permanent magnet is used as the rotor magnetic field source, energy loss is reduced and the efficiency of the motor 8 is improved.

[0038] The impeller 2 is installed on the output shaft of the brushless DC motor 8 and is fixedly connected through an end nut 3 and a key pin 11. The brushless DC motor 8 includes a permanent magnet rotor. In order to further achieve highly integrated installation, the output shaft and the permanent magnet rotor are integrally formed. Bearings are installed at intervals in the axial direction of the permanent magnet rotor. Further, by setting the bearings in the form of ceramic bearings, a relatively high service life can be achieved and the failure rate can be reduced.

[0039] From the perspective of the sealing of the liquid cooling pump, the brushless DC motor 8 includes a housing. A plurality of sealing rings are provided between the housing and the pump housing 1, which can form the overall sealing form of the static seal of the liquid cooling pump and ensure zero leakage of the medium.

[0040] The pump housing 1 includes a liquid cooling pump inlet 24 and a liquid cooling pump outlet 25, which are mainly used for the refrigerant medium to enter the pump housing 1 and to be output from the pump housing 1 after pressurization. The liquid cooling pump inlet 24 is located at the center of the pump housing 1, and the liquid cooling pump outlet 25 is arranged on the side of the liquid cooling pump inlet 24.

[0041] Specifically, an outlet pump pipe 26 is arranged on the side of the liquid cooling pump inlet 24, and the liquid cooling pump outlet 25 is connected to the outlet pump pipe 26. Further, the outlet pump pipe 26 is arranged in the tangential direction of the pump housing 1, and the axis of the liquid cooling pump outlet 25 coincides with the axis of the outlet pump pipe 26.

[0042] Through this setting method, considering the relationship between the above different inlets, outlets and pump pipes, the factors of the integrated installation of the machine pump assembly and the convenience of maintenance and use can be fully considered. Compared with the existing traditional water pump with a coaxial inlet and outlet pipeline design and layout method, the above-mentioned machine pump components of the pump housing 1 in the present invention are integrally manufactured by 3D printing combined with precision molds, ensuring the optimal high and low dimensional space design, so as to meet the specific integration and equipment maintenance and replacement requirements in the liquid cooling system of the data center.

[0043] The bearings on the permanent magnet rotor include a first bearing 6 located on the front side of the permanent magnet rotor and a second bearing 7 located on the rear side of the permanent magnet rotor. In order to extend the service life of the bearings, both the first bearing 6 and the second bearing 7 are ceramic bearings.

[0044] Combined with the internal space layout of the drive motor 8 and the connection with the main rotating component, the impeller 2, the size of the first bearing 6 is larger than that of the second bearing 7, which can ensure the system stability and compact layout.

[0045] The brushless DC motor 8 includes a stator. From the perspective of heat dissipation, the interior of the housing is filled with a front heat-conducting pad 23. The front heat-conducting pad 23 is filled in the gap between the first bearing 6, the stator, and the pump housing 1. On the one hand, it can play a good heat dissipation effect, transferring the heat of the first half part to the housing through heat conduction for external heat dissipation. On the other hand, it can play an auxiliary sealing performance and reduce the leakage risk.

[0046] A rear heat-conducting pad 12 is filled between the second bearing 7, the stator, and the control housing 13. The rear heat-conducting pad 12 includes an integrally structured heat-conducting ring wall and a heat-conducting flat wall. The heat-conducting ring wall is arranged between the second bearing 7 and the stator, and the heat-conducting flat wall is attached to the control housing 13. The heat-conducting ring wall can conduct the heat generated by the stator and the second bearing 7 to the heat-conducting flat wall. Finally, combined with the attachment of the heat-conducting flat wall and the control housing 13, the heat is conducted to the control housing 13 made of aluminum alloy for good heat dissipation.

[0047] To ensure the stability of the installation of the second bearing 7, an elastic wave spring 10 is arranged between the heat-conducting flat wall and the second bearing 7. The elastic wave spring 10 is attached to the outer ring side wall of the second bearing 7, and the elastic force of the elastic wave spring 10 can buffer the fixed non-rotating outer ring side wall of the second bearing 7, thereby ensuring the reliability of the second bearing 7 during operation.

[0048] A bearing end cover 9 is arranged at the front end of the first bearing 6. The bearing end cover 9 is arranged between the tube housing and the first bearing 6, and presses the first bearing 6 into the interior of the housing.

[0049] An adjusting pad 4 is arranged between the first bearing 6 and the impeller 2, which can tightly press the inner ring of the first bearing 6 and the impeller 2 for linkage rotation.

[0050] The bearing end cover 9 is pressed on the outer ring side wall of the first bearing 6, and the adjusting pad 4 is pressed on the inner ring side wall of the first bearing 6, which can ensure the reliable rotation of the inner ring of the first bearing 6 relative to the outer ring.

[0051] The static sealing rings in the present utility model include a first sealing ring 5 and a second sealing ring 22. Among them, the first sealing ring 5 is arranged at the joint part of the tube housing and the housing, and the second sealing ring 22 is arranged at the joint part of the housing and the control housing 13, which can form a shielding seal between the driving part and the outside to ensure the effect of static sealing.

[0052] Inside the control housing 13, a circuit board 18 is installed. On the outer side wall of the control housing 13, a first connector 16 and a second connector 17 are installed. The connectors are electrically connected to the circuit board 18, thus ensuring effective control of the drive assembly.

[0053] The tail of the control housing 13 is connected to a rear cover 14. At the annular connection part between the rear cover 14 and the control housing 13, a third sealing ring 15 is installed. The third sealing ring 15 can effectively play an electrical sealing effect and enhance the safety and reliability of electrical control.

[0054] In the liquid cooling pump of the present utility model, the front heat conducting pad 23 is connected to the housing of the motor 8 by countersunk head screws 19. The pipe shell and the housing of the motor 8 are connected by socket head cap screws 20. The rear cover 14 and the control housing 13 are connected by pan head screws 21. All materials are made of 300 series stainless steel. At the same time, the traditional dynamic sealing structure is removed, and an integrated static sealing structure is adopted to ensure zero leakage of the medium.

[0055] It should be noted that, without conflict, the features in the embodiments of this application can be combined with each other.

[0056] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A static seal liquid-cooled pump, characterized in that, Including: a pump casing and an impeller; The pump casing includes a pipe casing and a control casing. A driving motor is connected between the pipe casing and the control casing. The driving motor includes a brushless DC motor, and the impeller is installed on the output shaft of the brushless DC motor; The brushless DC motor includes a permanent magnet rotor. The output shaft is integrally formed with the permanent magnet rotor. Bearings are installed at intervals in the axial direction of the permanent magnet rotor; The brushless DC motor includes a motor casing. Multiple sealing rings are provided between the motor casing and the pump casing.

2. The static-sealing liquid-cooled pump according to claim 1, wherein The pump casing includes a liquid cooling pump inlet at the center and an outlet pump pipe provided on the side of the liquid cooling pump inlet. A liquid cooling pump outlet is connected to the outlet pump pipe.

3. The static seal liquid-cooled pump according to claim 2, wherein, The outlet pump pipe is arranged in the tangential direction of the pump casing, and the axis of the liquid cooling pump outlet coincides with the axis of the outlet pump pipe.

4. The static seal liquid-cooled pump according to claim 1, characterized in that, The bearings include a first bearing located on the front side of the permanent magnet rotor and a second bearing located on the rear side of the permanent magnet rotor. Both the first bearing and the second bearing are ceramic bearings, and the size of the first bearing is larger than the size of the second bearing.

5. The static-sealing liquid-cooled pump according to claim 4, wherein, The brushless DC motor includes a stator. The interior of the motor casing is filled with a front thermal pad, and the front thermal pad fills the gap between the first bearing, the stator, and the pump casing; A rear thermal pad is filled between the second bearing, the stator, and the control casing. The rear thermal pad includes an integrally structured thermal conduction ring wall and a thermal conduction flat wall. The thermal conduction ring wall is arranged between the second bearing and the stator, and the thermal conduction flat wall is attached to the control casing.

6. The static seal liquid-cooled pump according to claim 5, characterized in that, An elastic wave spring is provided between the thermal conduction flat wall and the second bearing, and the elastic wave spring is attached to the outer ring side wall of the second bearing.

7. The static seal liquid-cooled pump according to claim 5, wherein, A bearing end cover is provided at the front end of the first bearing. The bearing end cover is arranged between the pipe casing and the first bearing. An adjustment pad is provided between the first bearing and the impeller. The bearing end cover is press-fitted on the outer ring side wall of the first bearing, and the adjustment pad is press-fitted on the inner ring side wall of the first bearing.

8. The static-sealing liquid-cooled pump according to claim 5, wherein, The sealing rings include a first sealing ring and a second sealing ring. The first sealing ring is arranged at the joint between the pipe casing and the motor casing, and the second sealing ring is arranged at the joint between the motor casing and the control casing.

9. The static seal liquid-cooled pump according to claim 5, characterized in that, A circuit board is installed inside the control casing, and a connector is installed on the outer side wall of the control casing. The connector is electrically connected to the circuit board.

10. The static-sealing liquid-cooled pump according to claim 5, characterized in that, A rear cover is connected to the tail of the control casing, and a third sealing ring is installed at the annular joint between the rear cover and the control casing.

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