Split liquid cooling pump

Abstract

The split liquid cooling pump comprises a motor and a pump body assembly which are arranged in a split mode. The motor comprises a machine shell, a stator and a rotor, the pump body assembly comprises a pump shell and an impeller, the pump shell is in butt joint with the machine shell, the rotor comprises an output shaft stretching into the pump shell, and the impeller is installed on the output shaft; a plurality of bearings are mounted in the axial direction of the rotor, and each bearing is a rolling bearing; a direct current coil is installed in the machine shell, the direct current coil is connected with the stator and arranged on the radial outer side of the rotor, a rear cover is arranged at the tail end of the machine shell, and an inner cavity of the machine shell is sealed and shielded through the rear cover. The leakage risk of the liquid cooling medium can be reduced to the minimum, and zero leakage of the medium is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of machine pumps, and in particular to a split liquid cooling pump. Background Art

[0002] At present, there are two main technical problems with liquid cooling pump products on the market:

[0003] On the one hand, the power of liquid cooling pumps is relatively small, and there is a lack of high-power product models. For the waterless liquid cooling system of the data center, the liquid cooling pumps with a power level of more than 5Kw have a large power, which leads to an increase in product volume and weight, and also leads to a large amount of heat. The traditional integrated design of the pump body and the drive causes the heat to interfere and affect each other, and the heat dissipation problem cannot be well solved. At the same time, due to the size limitation of the drive device and the coordination of the design, the volume of the pump body cannot be further reduced.

[0004] On the other hand, most of the existing mature liquid cooling products use a motor combined shield design combined with a sliding bearing solution, which has low sealing reliability. In view of the volatile nature of the fluorinated liquid, the waterless working medium of data center liquid cooling, existing liquid cooling products cannot achieve zero leakage of the fluorinated liquid and cannot meet the extremely high design requirements for product sealing and reliability.

[0005] At the same time, sliding bearings are prone to instability and shorten their service life when used in data centers where liquid cooling frequently adjusts operating conditions. Utility Model Content

[0006] The purpose of this application is to provide a split liquid cooling pump that can solve the above-mentioned technical problems.

[0007] In order to achieve the above-mentioned object, the utility model provides a split liquid cooling pump, including a motor and a pump body assembly which are separately arranged;

[0008] The motor includes a casing, a stator and a rotor, the pump body assembly includes a pump casing and an impeller, the pump casing is docked with the casing, the rotor includes an output shaft extending into the pump casing, and the impeller is mounted on the output shaft;

[0009] A plurality of bearings are installed in the axial direction of the rotor, and each of the bearings is a rolling bearing;

[0010] A DC coil is installed inside the casing, the DC coil is connected to the stator and is arranged on the radially outer side of the rotor, and a rear cover is arranged at the rear end of the casing, and the rear cover seals and shields the inner cavity of the casing.

[0011] In an optional embodiment, the pump housing is fastened to the casing by screws, the casing includes a boss for mounting the pump housing, and a sealing ring is provided at the connecting portion between the boss and the casing.

[0012] In an alternative embodiment, the impeller is installed in the pump housing, which includes an inlet at the center and an outlet provided in the tangential direction of the pump housing. The outlet includes a flared diffuser.

[0013] In an alternative embodiment, the output shaft and the rotor are of an integral structure. The impeller is fixedly installed on the output shaft through an end nut and a key pin. The bearing includes a pair of front bearings and a single rear bearing.

[0014] In an alternative embodiment, the front bearing includes a ceramic angular contact bearing, the rear bearing includes a deep groove ball bearing, and both the front bearing and the rear bearing are installed in the housing.

[0015] In an alternative embodiment, a bearing end cover is provided between the pump housing and the housing. The bearing end cover is connected to the housing and press-fits and fixes the outer ring of the front bearing.

[0016] In an alternative embodiment, an adjustment pad is provided between the impeller and the front bearing. The adjustment pad is press-fitted between the impeller and the inner ring of the front bearing.

[0017] In an alternative embodiment, a bearing inner pressure ring is connected to the tail end of the rotor. The bearing inner pressure ring includes a mounting ring and a press-fitting ring. The mounting ring is fixed to the tail end face of the rotor by screws, and the press-fitting ring is press-fitted on the inner ring side wall of the rear bearing.

[0018] In an alternative embodiment, the rear cover includes a plate-like structure made of aluminum alloy and is butt-connected to the tail end face of the housing.

[0019] In an alternative embodiment, a heat-conducting pad is provided between the rear cover and the rotor. The heat-conducting pad includes an integral heat-conducting ring wall and a heat-conducting flat wall. The heat-conducting ring wall is clamped around the outer ring of the rear bearing, and the heat-conducting flat wall is attached to the inner side wall of the rear cover.

[0020] Through the separately arranged motor and pump body assembly, the separation of the pump body and the drive can be realized, reducing the mutual interference of heat dissipation between the two.

[0021] Combined with the docking of the pump housing and the housing, and the installation of the impeller on the rotor output shaft, the combination of the drive and the pump body is realized, constituting the basic function of the liquid-cooled pump, and at the same time enhancing the integration performance of the equipment components.

[0022] The setting form of the rolling bearing can ensure the reliability of the overall seal of the liquid-cooled pump and is applicable to application scenarios with extremely high requirements for sealing and reliability.

[0023] By adjusting the relative positions of the DC coil, stator, and rotor inside the housing, the internal space of the housing can be reduced, ensuring a smaller overall size of the liquid-cooled pump in the form of reducing the volume of the drive part.

[0024] The cooperation between the rear cover and the housing forms an integrated sealed shield, minimizing the risk of leakage of the liquid-cooled medium and ensuring zero leakage of the medium.

[0025] Other features and advantages of this application will be described in detail in the following detailed implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this 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.

[0027] Figure 1 Schematic diagram of the internal structure of the split liquid-cooled pump of this application;

[0028] Figure 2 Schematic side view of the split liquid-cooled pump of this application;

[0029] Figure 3 Schematic three-dimensional view of the split liquid-cooled pump of this application.

[0030] ICON:

[0031] 1 - Motor; 11 - Housing; 12 - Stator; 13 - Rotor; 14 - Output shaft; 15 - Rear cover; 16 - Boss;

[0032] 2 - Pump body assembly; 21 - Pump housing; 22 - Impeller; 23 - Inlet; 24 - Outlet;

[0033] 3 - Bearing; 31 - Front bearing; 32 - Rear bearing; 33 - Bearing end cover; 34 - Adjusting pad; 35 - Bearing inner pressure ring;

[0034] 4 - DC coil;

[0035] 5 - Sealing ring;

[0036] 6 - Shaft end nut;

[0037] 7 - Key pin;

[0038] 8 - Thermal pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0040] In the description of this 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 accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element 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 this application. In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0041] In the description of this 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 can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0042] The split liquid-cooled pump in this application is mainly applied to the waterless liquid-cooling system in the data center, specifically a high-power liquid-cooled pump with a power of more than 5 Kw. By adopting a split setting form, it solves the technical problems of poor heat dissipation and difficulty in high integration.

[0043] See Figure 1 and in combination with Figures 2 - 3 The main structure of the split liquid-cooled pump includes a separately arranged motor 1 and a pump body assembly 2. By separately arranging the motor 1 and the pump body assembly 2, it is possible to separately arrange the pump body assembly 2 and the drive assembly, reducing the mutual interference of heat dissipation between the pump body and the drive.

[0044] The motor 1 includes a motor housing 11, a stator 12, and a rotor 13, constituting the basic electrical structure of the drive assembly; the pump body assembly 2 includes a pump housing 21 and an impeller 22, constituting the structure for transporting the refrigerant medium of the pump body assembly 2.

[0045] The pump housing 21 is docked with the machine housing 11, enabling the integrated docking installation of the two structures. The rotor 13 includes an output shaft 14 extending into the pump housing 21, and the impeller 22 is installed on the output shaft 14, which can realize the organic combination of the driving function and the conveying function. When the impeller 22 rotates drivenly, the refrigerant medium is pressurized and conveyed in the pump housing 21.

[0046] A plurality of bearings 3 are axially installed on the rotor 13, and each of the bearings 3 is a rolling bearing 3. Compared with the sliding bearing 3, the rolling bearing 3 has good sealing performance, which can ensure the reliability of the overall seal of the liquid-cooled pump and is suitable for the material conveying scenarios with extremely high requirements for sealing and reliability, especially for the pressurized conveying of the fluorinated liquid of the volatile mechanism in the liquid-cooled system of the data center.

[0047] A DC coil 4 is installed inside the machine housing 11. The DC coil 4 is connected to the stator 12 and is arranged radially outside the rotor 13, which can highly integrate the DC coil 4, the stator 12 and the rotor 13 in the internal space of the machine housing 11, reduce the volume of the driving part. Under the condition that the size of the pump body assembly 2 cannot be reduced, by reducing the external dimensions of the driving part, the overall external dimensions of the liquid-cooled pump can be reduced, ensuring the integration, miniaturization and light weight of the liquid-cooled pump.

[0048] A rear cover 15 is provided at the tail end of the machine housing 11. The rear cover 15 seals and shields the inner cavity of the machine housing 11, which can reduce the leakage risk of the liquid-cooled medium to the minimum and ensure zero leakage of the fluorinated liquid medium.

[0049] The pump housing 21 and the machine housing 11 are fixedly connected by screws. Specifically, after the pump housing 21 and the machine housing 11 are docked and assembled, they are fastened by screws, which can ensure the effective reliability of the connection.

[0050] The machine housing 11 includes a boss 16 for installing the pump housing 21, which can ensure the connection area between the machine housing 11 and the pump housing 21. In order to enhance the sealing performance of the pump housing 21, a sealing ring 5 is provided at the joint between the boss 16 and the machine housing 11. Specifically, a groove is provided on the installation ring surface of the pump housing 21 facing the boss 16, and the sealing ring 5 is flexibly pressed in the groove to reduce the risk of the material in the pump housing 21 leaking into the machine housing 11.

[0051] The impeller 22 is installed in the pump housing 21. The pump housing 21 includes an inlet 23 located in the center and an outlet 24 provided in the tangential direction of the pump housing 21. By this setting method, the output resistance of the refrigerant medium can be reduced. At the same time, the outlet 24 of the pump housing 21 includes a flared gradually expanding port, which can improve the pumping efficiency and reduce the noise generated during the operation of the liquid-cooled pump.

[0052] The output shaft 14 and the rotor 13 are of an integral structure, which is conducive to ensuring the coaxiality and stability of the output shaft 14 and the rotor 13 during rotation. At the same time, it can reduce the vibration and wear caused by the relative movement between different components, and achieve effective power transmission.

[0053] The impeller 22 is fixedly installed on the output shaft 14 through the shaft end nut 6 and the key pin 7, enabling the impeller 22 to keep in sync with the output shaft 14 during rotation.

[0054] In order to ensure the effective rotation of the rotating shaft, bearings 3 installed on the rotor 13 include a front bearing 31 and a rear bearing 32. The front bearing 31 includes two pairs arranged closely, which can ensure the installation stability of the rotor 13 in the front part near the impeller 22.

[0055] The rear bearing 32 is arranged singly at the tail end of the housing 11. On the premise of ensuring the rotatable fixation of the tail of the rotor 13, it can ensure a more concise structure and reduce the floor area of the drive part.

[0056] Based on the fact that the bearings 3 in this application are all in the form of rolling bearings 3, the two front bearings 31 include ceramic angular contact bearings 3, and the rear bearing 32 includes deep groove ball bearings 3. Considering integrated installation, the front bearing 31 and the rear bearing 32 are both installed in the housing 11.

[0057] The setting form of the rolling bearing 3 can ensure the extremely high reliability of the liquid cooling system operation, and can solve the problem that the instability of the bearing 3 is easily caused in various working conditions of the liquid cooling system, affecting the service life.

[0058] A bearing end cover 33 is provided between the pump housing 21 and the housing 11. The bearing end cover 33 is connected to the housing 11 and press-fits and fixes the outer ring of the front bearing 31, which can ensure the installation stability of the front bearing 31.

[0059] An adjustment pad 34 is provided between the impeller 22 and the front bearing 31. The adjustment pad 34 is press-fitted between the impeller 22 and the inner ring of the front bearing 31, which can adjust the gap between the impeller 22 and the front bearing 31, and then adjust the appropriate pre-tightening force to ensure the stable operation of the front bearing 31 and extend its service life.

[0060] From the perspective of the stable and reliable installation of the rear bearing 32, the tail end of the rotor 13 is connected with a bearing inner pressure ring 35, which is used to assist in supporting and fixing the axial position of the rear bearing 32.

[0061] The bearing inner pressure ring 35 includes an installation ring and a press-fitting ring. The installation ring is fixed to the tail end face of the rotor 13 by screws, and the press-fitting ring is press-fitted on the inner ring side wall of the rear bearing 32.

[0062] Through the tight fit between the inner pressure ring 35 of the bearing and the inner ring of the rear bearing 32, axial displacement of the rear bearing 32 can be effectively prevented, vibration and noise of the rear bearing 32 can be reduced, and the reliability and working efficiency of the bearing 3 can be improved.

[0063] The rear cover 15 includes a plate-like structure made of aluminum alloy and is butt-jointed with the tail end face of the housing 11, capable of shielding and sealing the internal space of the housing 11.

[0064] Furthermore, a heat-conducting pad 8 is provided between the rear cover 15 and the rotor 13. The heat-conducting pad 8 includes an integrally structured heat-conducting ring wall and a heat-conducting flat wall. The heat-conducting ring wall is clamped around the outer ring of the rear bearing 32, and the heat-conducting flat wall is attached to the inner side wall of the rear cover 15. Combined with the rear cover 15 made of aluminum alloy, the heat generated by the motor 1 can be conducted to the rear cover 15 through the heat-conducting pad 8 and further dissipated outward, improving the heat dissipation effect of the motor 1.

[0065] It should be emphasized that through the split setting form of the drive and the pump body, the overall external dimensions of the liquid cooling pump can be reduced in the form of reducing the drive volume. At the same time, the drive and the pump body can be interchanged, which is beneficial to the cooperation of different forms of pump bodies and drives, facilitates system layout and improves heat dissipation.

[0066] In the high-power liquid cooling pump of the present utility model, the pump volume and weight can also be greatly reduced by further increasing the rotational speed, so that the high-power liquid cooling pump has an optimal power-to-weight ratio.

[0067] By adopting the integral shielding of the housing 11 and combining with the setting of the rolling bearing 3, integral metal processing of the housing 11 can be realized, absolute zero leakage can be achieved, and the rolling bearing 3 can be suitable for various working conditions to ensure the reliable operation of the shafting.

[0068] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0069] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A split liquid-cooled pump, characterized in that, It includes a motor and a pump body assembly that are separately arranged; The motor includes a housing, a stator, and a rotor. The pump body assembly includes a pump housing and an impeller. The pump housing is docked with the housing. The rotor includes an output shaft extending into the pump housing, and the impeller is installed on the output shaft; A plurality of bearings are axially installed on the rotor, and each of the bearings is a rolling bearing; A DC coil is installed inside the housing. The DC coil is connected to the stator and is arranged radially outside the rotor. A rear cover is provided at the tail end of the housing, and the rear cover seals and shields the inner cavity of the housing.

2. The split liquid-cooled pump according to claim 1, wherein The pump housing and the housing are fixedly connected by screws. The housing includes a boss for installing the pump housing, and a sealing ring is provided at the joint between the boss and the housing.

3. The split liquid-cooled pump according to claim 1, characterized in that The impeller is installed in the pump housing. The pump housing includes an inlet at the center and an outlet provided in the tangential direction of the pump housing. The outlet includes a flared gradually expanding port.

4. The split liquid-cooled pump according to any one of claims 1-3, characterized in that, The output shaft and the rotor are of an integral structure. The impeller is fixedly installed on the output shaft through an axle end nut and a key pin. The bearings include a pair of front side bearings arranged in pairs and a single rear side bearing.

5. The split liquid-cooled pump according to claim 4, characterized in that, The front side bearings include ceramic angular contact bearings, and the rear side bearing includes a deep groove ball bearing. The front side bearings and the rear side bearings are both installed in the housing.

6. The split liquid-cooled pump according to claim 4, characterized in that, A bearing end cover is provided between the pump housing and the housing. The bearing end cover is connected to the housing and press-fits and fixes the outer ring of the front side bearing.

7. The split liquid-cooled pump according to claim 4, characterized in that, An adjusting pad is provided between the impeller and the front side bearing. The adjusting pad is press-fitted between the impeller and the inner ring of the front side bearing.

8. The split liquid-cooled pump according to claim 4, characterized in that, A bearing inner pressure ring is connected to the tail end of the rotor. The bearing inner pressure ring includes an installation ring and a press-fitting ring. The installation ring is fixed to the tail end face of the rotor by screws, and the press-fitting ring is press-fitted on the inner ring side wall of the rear side bearing.

9. The split liquid-cooled pump according to claim 4, characterized in that, The rear cover includes a plate-like structure made of aluminum alloy and is butt-connected to the tail end face of the housing.

10. The split liquid-cooled pump according to claim 9, characterized in that, A heat-conducting pad is provided between the rear cover and the rotor. The heat-conducting pad includes an integral heat-conducting ring wall and a heat-conducting flat wall. The heat-conducting ring wall clamps the outer ring of the rear side bearing, and the heat-conducting flat wall fits against the inner side wall of the rear cover.

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