Water-cooled bearing box

Abstract

The utility model discloses a water-cooling bearing box, and relates to the technical field of bearing cooling, the water-cooling bearing box comprises a bearing box body, the bearing box body is provided with a water-cooling ring cavity, a water inlet and a water outlet, the water inlet and the water outlet are communicated with the water-cooling ring cavity, the water-cooling ring cavity is arranged on the outer side of a bearing in the bearing box body in the radial direction of the bearing box body, and the water-cooling ring cavity is isolated from an oil cavity of the bearing box body; the integrated water-cooling gland is provided with a gland body and a heat dissipation structure, the gland body is detachably connected with the bearing box body and used for sealing the water-cooling annular cavity, the heat dissipation structure is arranged on the surface, facing the water-cooling annular cavity, of the gland body, and the heat dissipation structure extends into the water-cooling annular cavity and is used for prolonging the running path of cooling water in the water-cooling annular cavity. According to the water-cooling bearing box, the running path of cooling water in the water-cooling ring cavity is prolonged by arranging the heat dissipation structure in the water-cooling ring cavity, and the heat exchange efficiency is improved; and the heat dissipation structure and the water-cooling gland are integrally designed, so that mounting and dismounting are convenient, the cooling ring cavity is convenient to clean at any time, and an efficient cooling effect is kept.

Description

Technical Field

[0001] This utility model relates to the field of bearing cooling technology, and in particular to a water-cooled bearing housing. Background Technology

[0002] Centrifugal pumps mainly consist of a pump body, pump cover, impeller, shaft, and bearing housing. The bearing housing plays a crucial role in stabilizing the rotating shaft, lubricating the bearings, and ensuring the smooth transmission of torque throughout the rotor. To ensure the long-term reliable operation of the bearings and the entire rotor, the bearing housing must have excellent heat dissipation capabilities.

[0003] Currently, the main heat dissipation methods for bearing housings include: First, increasing the volume and surface area of ​​the bearing housing (e.g., designing heat dissipation fins on the outer surface of the bearing housing) to increase the heat exchange area in contact with air, thereby accelerating heat dissipation. However, as a casting, the bearing housing has a complex shape and is prone to casting defects, resulting in limited heat dissipation performance at high temperatures. Second, using an external fan to allow airflow across the outer surface of the bearing housing to accelerate the heat dissipation process. However, the fan does not run when the pump is idle, resulting in poor heat dissipation performance during pump standby. Third, introducing cooling water to enhance heat exchange efficiency and achieve rapid heat dissipation. However, the flow path of the cooling water within the housing is short, resulting in low heat exchange efficiency and poor heat dissipation function.

[0004] As a technical improvement, adding a split cooling jacket to the outside of the bearing housing can effectively improve the heat dissipation function of the bearing housing. However, due to the limitations of this cooling jacket installation structure, it is impossible to install bearing temperature and vibration measuring instruments on the bearing housing. This technical solution is not suitable for working conditions that require equipment condition monitoring. Utility Model Content

[0005] The purpose of this invention is to provide a water-cooled bearing housing that solves the problem that existing bearing housing cooling technologies cannot simultaneously achieve good heat dissipation and meet the installation requirements of equipment condition monitoring components.

[0006] The above-mentioned objectives of this utility model can be achieved by the following technical solutions:

[0007] This utility model provides a water-cooled bearing housing, comprising: a bearing housing body having a water-cooled annular cavity and an inlet and an outlet communicating with the water-cooled annular cavity; the water-cooled annular cavity being disposed on the outer side of the bearing inside the bearing housing body along the radial direction of the bearing housing body, and the water-cooled annular cavity being isolated from the oil cavity of the bearing housing body; and an integrated water-cooled pressure cap having a pressure cap body and a heat dissipation structure, the pressure cap body being detachably connected to the bearing housing body and used to seal the water-cooled annular cavity; the heat dissipation structure being disposed on the surface of the pressure cap body facing the water-cooled annular cavity, the heat dissipation structure extending into the interior of the water-cooled annular cavity to extend the running path of the cooling water within the water-cooled annular cavity. Preferably, the heat dissipation structure is interference-fitted with the wall surface of the water-cooled annular cavity on the side near the axis of the bearing housing body.

[0008] Preferably, the interference fit between the heat dissipation structure and the water-cooled annular cavity is no greater than 0.02 mm.

[0009] Preferably, the heat dissipation structure includes a support sleeve and a spiral guide vane. The spiral guide vane is continuously arranged on the outer wall of the support sleeve along the axial direction of the support sleeve, and the two ends of the spiral guide vane are respectively connected to the water inlet and the water outlet.

[0010] Preferably, a preset gap is left between the spiral guide vane and the wall surface of the water-cooled annular cavity on the side away from the axis of the bearing housing.

[0011] Preferably, the preset gap is 0.4mm to 0.6mm.

[0012] Preferably, the spiral guide vane is inclined toward the outer wall of the bearing housing from the end where the water inlet is located to the end where the water outlet is located.

[0013] Preferably, the radial projection of the water-cooled annular cavity to the center can cover the radial projection of the bearing inside the bearing housing to the center.

[0014] Preferably, the water inlet is located at the bottom of the bearing housing, and the water outlet is located at the top of the bearing housing.

[0015] Preferably, the water-cooled bearing housing further includes a first sealing ring gasket and a second sealing ring gasket. The pressure cover body extends radially inward to form a first pressing part, and the pressure cover body extends radially outward to form a second pressing part. The support sleeve is connected to the pressure cover body between the first pressing part and the second pressing part. The first sealing ring gasket is connected between the first pressing part and the bearing housing, and the second sealing ring gasket is connected between the second pressing part and the bearing housing.

[0016] Preferably, the integrated water-cooled pressure cover is detachably connected to the bearing housing by fastening bolts, the second pressing part is provided with a plurality of mounting holes spaced apart along the circumferential direction, and the bearing housing is provided with a plurality of positioning threaded holes that cooperate with the plurality of mounting holes.

[0017] The features and advantages of this utility model are as follows: The water-cooled bearing housing provided by this utility model extends the running path of the cooling water in the water-cooled annular cavity by setting a heat dissipation structure in the water-cooled annular cavity, thereby improving the heat exchange efficiency; by isolating the water-cooled annular cavity from the oil cavity of the bearing housing, it is convenient to configure bearing oil cavity temperature and vibration measuring instruments, making the water-cooled bearing housing suitable for working conditions that require equipment condition monitoring; by designing the heat dissipation structure and the pressure cover body as an integral unit, it is convenient to install and disassemble, and it is easy to clean the dirt in the cooling annular cavity at any time, maintaining a high-efficiency cooling effect; by directly forming the water-cooled annular cavity, water inlet and water outlet on the bearing housing, the sealing of the water-cooled annular cavity is relatively simple, and when the water-cooled annular cavity needs to be cleaned, it is not necessary to remove and restore the cooling water pipeline, saving maintenance time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the water-cooled bearing housing provided in the embodiment of this utility model;

[0020] Figure 2 This is an exploded structural diagram of the water-cooled bearing housing provided in the embodiments of this utility model;

[0021] Figure 3 This is a schematic diagram of the integrated water-cooled pressure cap provided in the embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the first cross-sectional structure of the water-cooled bearing housing provided in the embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the second cross-sectional structure of the water-cooled bearing housing provided in this embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram showing the relative positions of the bearing and the water-cooled annular cavity in the water-cooled bearing housing provided in this embodiment of the present invention.

[0025] Explanation of icon numbers:

[0026] 1. Bearing housing; 11. Water-cooled annular cavity; 111. Inner wall; 112. Outer wall; 12. Water inlet; 13. Water outlet; 14. Exhaust port; 15. Temperature measuring hole; 16. Vibration measuring hole; 17. Oil cup and oil sight glass hole; 18. Bearing; 19. Outer wall surface;

[0027] 2. Gland body; 21. First pressing part; 22. Second pressing part; 23. Mounting hole;

[0028] 3. Heat dissipation structure; 31. Support sleeve; 32. Spiral airflow guide vane;

[0029] 4. First sealing ring gasket;

[0030] 5. Second sealing ring gasket. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figures 1 to 6 As shown, this utility model provides a water-cooled bearing housing, including a bearing housing body 1 and an integrated water-cooled pressure cover connected to each other. The bearing housing body 1 has a water-cooled annular cavity 11 and a water inlet 12 and an outlet 13 connected to the water-cooled annular cavity 11. Along the radial direction of the bearing housing body 1, the water-cooled annular cavity 11 is disposed outside the bearing 18 inside the bearing housing body 1, and the water-cooled annular cavity 11 is isolated from the oil cavity of the bearing housing body 1 to facilitate the retention of the bearing oil cavity temperature and vibration measuring instrument configuration on the bearing housing body 1. Specifically, it includes a temperature measuring hole 15, a vibration measuring hole 16, and an oil cup and an oil sight glass hole 17 disposed on the bearing housing body 1. The integrated water-cooled cap has a cap body 2 and a heat dissipation structure 3. The cap body 2 is detachably connected to the bearing housing 1 and is used to seal the water-cooled annular cavity 11. The surface of the cap body 2 facing the water-cooled annular cavity 11 is provided with a heat dissipation structure 3 that extends into the interior of the water-cooled annular cavity 11. The heat dissipation structure 3 is used to extend the running path of the cooling water in the water-cooled annular cavity 11, thereby increasing the heat exchange area and improving the heat exchange efficiency. The heat dissipation structure 3 and the cap body 2 can be manufactured by integral molding, or they can be manufactured separately and then fixedly connected by welding or other methods. This application does not impose any restrictions on this.

[0033] The water-cooled bearing housing provided by this utility model extends the running path of cooling water within the water-cooled annular cavity 11 by setting a heat dissipation structure 3 inside the water-cooled annular cavity 11, thereby improving heat exchange efficiency. Furthermore, by isolating the water-cooled annular cavity 11 from the oil cavity of the bearing housing 1, it facilitates the configuration of bearing oil cavity temperature and vibration measuring instruments, making the water-cooled bearing housing suitable for operating conditions requiring equipment condition monitoring. The integrated design of the heat dissipation structure 3 and the pressure cap body 2 facilitates installation and disassembly, allowing for easy cleaning of dirt within the cooling annular cavity and maintaining efficient cooling. By directly forming the water-cooled annular cavity 11, inlet 12, and outlet 13 on the bearing housing 1, the sealing of the water-cooled annular cavity 11 is relatively simple. Moreover, when cleaning the water-cooled annular cavity 11, it is not necessary to dismantle and restore the cooling water pipeline, saving maintenance time.

[0034] According to one embodiment of the present invention, in order to enhance the heat transfer effect, the heat dissipation structure 3 is interference-fitted with the wall surface of the water-cooled annular cavity 11 on the side near the axis of the bearing housing 1.

[0035] According to one embodiment of this utility model, the interference fit between the heat dissipation structure 3 and the water-cooling annular cavity 11 is no greater than 0.02mm. This allows for easy and effortless assembly and disassembly of the pressure cap body 2 and the heat dissipation structure 3 while achieving good heat transfer performance.

[0036] According to one embodiment of the present invention, such as Figure 3 As shown, the heat dissipation structure 3 includes a support sleeve 31 and spiral guide vanes 32. The support sleeve 31 is interference-fitted with the inner wall 111 of the water-cooled annular cavity 11. The spiral guide vanes 32 are continuously arranged on the outer wall of the support sleeve 31 along the axial direction of the support sleeve 31, which facilitates the processing and manufacturing of the heat dissipation structure 3 and the cleaning of dirt on the spiral guide vanes 32. The two ends of the spiral guide vanes 32 are respectively connected to the water inlet 12 and the water outlet 13 to ensure the spiral flow path of the cooling water in the water-cooled annular cavity 11, thereby ensuring the heat dissipation effect.

[0037] According to one embodiment of the present invention, a preset gap is left between the spiral guide vane 32 and the wall surface of the water-cooled annular cavity 11 on the side away from the axis of the bearing housing 1, so that part of the cooling water entering the water-cooled annular cavity 11 flows axially along the preset gap, ensuring uniform axial heat dissipation.

[0038] According to one embodiment of this utility model, the preset gap is 0.4mm to 0.6mm. This ensures that most of the cooling water entering from the inlet 12 flows spirally along the spiral guide vanes, while a small portion flows axially along the preset gap, thus balancing heat exchange efficiency and uniform axial heat dissipation.

[0039] According to one embodiment of the present invention, such as Figures 4 to 6As shown, the spiral guide vanes 32 are inclined toward the outer wall surface 19 of the bearing housing 1 from the end where the inlet 12 is located to the end where the outlet 13 is located. This reduces the resistance of the cooling water flowing in the axial direction and avoids excessive turbulence in the cooling ring cavity, which could affect the operational stability of the bearing 18.

[0040] According to one embodiment of the present invention, such as Figure 6 As shown, the radial projection of the water-cooled annular cavity 11 towards the center covers the radial projection of the bearing 18 inside the bearing housing 1. This can be understood as the projection of the water-cooled annular cavity 11 onto the axis of the bearing housing 1 covering the projection of the bearing 18 inside the bearing housing 1 onto the axis of the bearing housing 1. In other words, along the axial direction of the bearing housing 1, the water-cooled annular cavity 11 has at least one section that coincides with the bearing 18 inside the bearing housing 1. This ensures that the heat generated by the bearing 18 during operation can be effectively dissipated, guaranteeing better heat dissipation for the bearing 18.

[0041] According to one embodiment of the present invention, such as Figure 1 and Figure 4 As shown, the inlet 12 is located at the bottom of the bearing housing 1, and the outlet 13 is located at the top of the housing. This slows down the flow rate of the cooling water in the cooling ring cavity and prolongs the heat exchange time. In this embodiment, two inlets 12 and two outlets 13 are provided to ensure the cooling water flow rate, and an exhaust port 14 for installing an oil-gas separator is provided between the two outlets 13 to remove air from the bearing 18 and prevent oil leakage caused by increased pressure inside the bearing 18.

[0042] According to one embodiment of the present invention, such as Figure 3 As shown, the pressure cap body 2 extends radially inward to form a first pressing part 21, and extends radially outward to form a second pressing part 22. A support sleeve 31 is connected to the pressure cap body 2 between the first pressing part 21 and the second pressing part 22. Figures 4 to 6 As shown, to further improve the sealing effect of the water-cooled annular cavity 11, a first sealing ring gasket 4 is connected between the first press-fit part 21 and the bearing housing 1, and a second sealing ring gasket 5 is connected between the second press-fit part 22 and the bearing housing 1. That is, in the radial direction, the first sealing ring gasket 4 is located inside the inner wall 111 of the water-cooled annular cavity 11, and the second sealing ring gasket 5 is located outside the outer wall 112 of the water-cooled annular cavity 11. The inner wall 111 refers to the wall surface of the water-cooled annular cavity 11 on the side close to the axis of the bearing housing 1; while the outer wall 112 refers to the wall surface of the water-cooled annular cavity 11 on the side away from the axis of the bearing housing 1. As a preferred embodiment, both the first sealing ring gasket 4 and the second sealing ring gasket 5 are made of oil-resistant non-asbestos materials such as composite gaskets to ensure their sealing reliability and reduce the risk of cooling water leakage.

[0043] According to one embodiment of this utility model, the integrated water-cooled pressure cap is detachably connected to the bearing housing 1 by fastening bolts. For example... Figures 1 to 3 As shown, the second pressing part 22 is provided with a plurality of mounting holes 23 spaced apart along the circumferential direction, and the bearing housing 1 is provided with a plurality of positioning threaded holes that mate with the plurality of mounting holes 23. When it is necessary to clean the heat dissipation structure 3 and the water-cooling ring cavity 11, an electric wrench can be used to remove the fastening bolts on both sides of the water-cooling ring cavity 11, and then the pressure cover body 2 and the heat dissipation structure 3 can be removed as a whole.

[0044] It should be noted that the water-cooled bearing housing solution provided in this application embodiment can be used to upgrade existing bearing housings to solve the problem of high bearing temperature in existing bearing housings. In addition to adding the above-mentioned structures related to heat dissipation of the bearing housing, the upgraded bearing housing does not need to change other components. Specifically, the original configuration of components such as bearings, oil cups, oil-gas separators, bearing temperature measuring resistors, and acceleration vibration sensors on the bearing housing is retained.

[0045] Based on the above description, the water-cooled bearing housing provided by this utility model embodiment has the following beneficial effects:

[0046] The water-cooled bearing housing provided in this embodiment of the invention extends the running path of the cooling water within the water-cooled annular cavity 11 by setting a heat dissipation structure 3 inside the water-cooled annular cavity 11, thereby improving heat exchange efficiency. Furthermore, by isolating the water-cooled annular cavity 11 from the oil cavity of the bearing housing 1, it facilitates the configuration of bearing oil cavity temperature and vibration measuring instruments, making the water-cooled bearing housing suitable for operating conditions requiring equipment condition monitoring. The integrated design of the heat dissipation structure 3 and the pressure cap body 2 facilitates installation and disassembly, allowing for easy cleaning of dirt within the cooling annular cavity and maintaining a high-efficiency cooling effect. A water-cooled annular cavity 11, an inlet 12, and an outlet 13 are formed on the bearing housing 1. The sealing of the water-cooled annular cavity 11 is relatively simple, and when the water-cooled annular cavity 11 needs to be cleaned, there is no need to dismantle and restore the cooling water pipeline, saving maintenance time. The heat transfer effect is enhanced by the interference fit between the heat dissipation structure 3 and the wall of the water-cooled annular cavity 11 on the side close to the axis of the bearing housing 1. Furthermore, the relative position of the water-cooled annular cavity 11 and the bearing 18 inside the bearing housing 1 ensures that the heat generated by the bearing 18 during operation can be effectively carried away, ensuring that the bearing 18 obtains a better heat dissipation effect.

[0047] The above descriptions are merely a few embodiments of this utility model. Those skilled in the art can make various modifications or variations to the embodiments of this utility model based on the content disclosed in the application documents without departing from the spirit and scope of this utility model.

Claims

1. A water-cooled bearing housing, characterized in that, include: The bearing housing has a water-cooled annular cavity and an inlet and an outlet connected to the water-cooled annular cavity. Along the radial direction of the bearing housing, the water-cooled annular cavity is located on the outside of the bearing inside the bearing housing, and the water-cooled annular cavity is isolated from the oil cavity of the bearing housing. An integrated water-cooled pressure cap has a pressure cap body and a heat dissipation structure. The pressure cap body is detachably connected to the bearing housing and is used to seal the water-cooled annular cavity. The heat dissipation structure is provided on the surface of the pressure cap body facing the water-cooled annular cavity. The heat dissipation structure extends into the interior of the water-cooled annular cavity to extend the running path of the cooling water within the water-cooled annular cavity.

2. The water-cooled bearing housing according to claim 1, characterized in that, The heat dissipation structure is interference-fitted with the wall surface of the water-cooled annular cavity on the side near the axis of the bearing housing.

3. The water-cooled bearing housing according to claim 2, characterized in that, The heat dissipation structure includes a support sleeve and a spiral guide vane. Along the axial direction of the support sleeve, the spiral guide vane is continuously arranged on the outer wall of the support sleeve, and the two ends of the spiral guide vane are respectively connected to the water inlet and the water outlet.

4. The water-cooled bearing housing according to claim 3, characterized in that, A preset gap is left between the spiral guide vane and the wall surface of the water-cooled annular cavity on the side away from the axis of the bearing housing.

5. The water-cooled bearing housing according to claim 4, characterized in that, The preset gap is 0.4mm to 0.6mm.

6. The water-cooled bearing housing according to claim 4, characterized in that, The spiral guide vane is inclined toward the outer wall of the bearing housing from the end where the water inlet is located to the end where the water outlet is located.

7. The water-cooled bearing housing according to claim 1, characterized in that, The radial projection of the water-cooled annular cavity towards the center can cover the radial projection of the bearing inside the bearing housing towards the center.

8. The water-cooled bearing housing according to claim 1, characterized in that, The water inlet is located at the bottom of the bearing housing, and the water outlet is located at the top of the bearing housing.

9. The water-cooled bearing housing according to claim 3, characterized in that, The water-cooled bearing housing further includes a first sealing ring gasket and a second sealing ring gasket. The pressure cover body extends radially inward to form a first pressing part, and the pressure cover body extends radially outward to form a second pressing part. The support sleeve is connected to the pressure cover body between the first pressing part and the second pressing part. The first sealing ring gasket is connected between the first pressing part and the bearing housing, and the second sealing ring gasket is connected between the second pressing part and the bearing housing.

10. The water-cooled bearing housing according to claim 9, characterized in that, The integrated water-cooled pressure cover is detachably connected to the bearing housing by fastening bolts. The second pressing part is provided with a plurality of mounting holes spaced apart along the circumferential direction. The bearing housing is provided with a plurality of positioning threaded holes that cooperate with the plurality of mounting holes.

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