Leak-proof bearing seat

Abstract

The application belongs to the technical field of machinery and relates to a leakage-proof bearing seat. The bearing seat comprises a bearing seat body and a rotating shaft. The bearing seat body is provided with a bearing chamber. A bearing is arranged in the bearing chamber. The upper end of the rotating shaft is connected with the output end of a motor. The lower end of the rotating shaft sequentially passes through the upper end of the bearing seat body, the bearing and the lower end of the bearing seat body and is connected with the bearing. A sealing assembly is arranged between the lower end of the bearing seat body and the rotating shaft. The leakage-proof device further comprises a liquid collecting cavity arranged on the bearing seat body. The liquid collecting cavity is communicated with the bearing chamber through a pipeline. The liquid inlet end of the pipeline is located below the bearing. The motor and the bearing seat body are installed in a water pump. When the water pump operates, liquid can be transported. When the sealing assembly between the lower end of the bearing seat body and the rotating shaft leaks, the liquid can first flow to the liquid collecting cavity through the pipeline, so that the liquid does not directly enter the bearing or the motor, the bearing does not abnormally operate, the motor is not damp and the like, and the operating stability of the bearing and the motor is ensured.

Description

Technical Field

[0001] This application belongs to the field of mechanical technology and relates to a leak-proof bearing housing. Background Technology

[0002] The core function of a bearing housing is to provide support and positioning. In a water pump, the bearing housing is a key structural component that connects rotating and stationary parts.

[0003] Patent CN222276970U discloses an integrated vertical sewage pump, including a heat dissipation assembly, a motor, a rotating shaft, an upper bearing housing, a lower bearing housing, a mechanical seal assembly, and an impeller; the heat dissipation assembly is located at the upper end of the rotating shaft; the upper bearing housing is located at the upper part of the rotating shaft, and the lower bearing housing is located at the lower part of the rotating shaft; the motor is located on the outer side of the middle part of the rotating shaft; the motor is located below the upper bearing housing; the mechanical seal assembly is located below the lower bearing housing, and the impeller is located at the bottom end of the rotating shaft and is fixedly connected to the rotating shaft.

[0004] As can be seen from the working principle of mechanical seals, when a mechanical seal is in operation, liquid enters the friction surfaces of the dynamic and static rings for lubrication and cooling. When a mechanical seal leaks, if the liquid enters the side near the bearing housing and does not evaporate in time, it will directly enter the bearing and motor, causing abnormal bearing operation and poor insulation of the motor due to moisture, thus affecting the stability of the water pump operation. Summary of the Invention

[0005] To ensure the stability of water pump operation, this application provides a leak-proof bearing housing.

[0006] The leak-proof bearing housing provided in this application adopts the following technical solution: A leak-proof bearing housing includes a bearing housing body and a rotating shaft. The bearing housing body has a bearing chamber, in which a bearing is disposed. The upper end of the rotating shaft is connected to the output end of a motor. The lower end of the rotating shaft passes sequentially through the upper end of the bearing housing body, the bearing, and the lower end of the bearing housing body, and the rotating shaft is fixedly connected to the bearing. A sealing assembly is disposed between the lower end of the bearing housing body and the rotating shaft. The leak-proof device also includes a liquid collection chamber disposed on the bearing housing body. The liquid collection chamber is connected to the bearing chamber through a pipeline, and the inlet end of the pipeline is located below the bearing.

[0007] By adopting the above technical solution, the motor and bearing housing are installed in the water pump. When the water pump is running, it can transport liquid. When the sealing component between the lower end of the bearing housing and the rotating shaft leaks, the liquid can first flow through the pipeline to the liquid collection chamber, avoiding the liquid from directly entering the bearing or motor and causing abnormal bearing operation or motor dampness. This ensures the operational stability of the bearing and motor and improves the service life of the motor and bearing housing.

[0008] Preferably, the pipeline includes a liquid collection tank and a liquid collection hole. The liquid collection tank is located at the bottom of the bearing housing body and in the bearing chamber. The liquid collection tank is located below the bearing and is spaced apart from the bearing. The liquid collection hole is located at the bottom of the bearing housing body. The inlet end of the liquid collection hole is connected to the liquid collection tank, and the outlet end of the liquid collection hole is connected to the liquid collection chamber.

[0009] By adopting the above technical solution, when the sealing component leaks, the liquid flows through the sealing component into the bearing chamber, where it first flows into the liquid collection tank, and then flows through the liquid collection hole into the liquid collection cavity. The liquid collection tank is spaced apart from the bearing, leaving a certain distance, which reduces the risk of liquid entering the bearing.

[0010] Preferably, the liquid collection chamber is located on the lower end face of the bearing housing body, and the lower end of the bearing housing body is detachably provided with a cover plate for sealing the liquid collection chamber.

[0011] By adopting the above technical solution, when a large amount of liquid is stored in the liquid collection chamber and maintenance is required, the cover plate can be opened to drain the liquid from the liquid collection chamber without turning on the entire motor.

[0012] Preferably, the bearing housing further includes a liquid inlet tube, the inlet end of which is connected to the liquid collection chamber, and the outlet end of which extends outside the bearing housing body. The outlet end of the liquid inlet tube is also provided with a plug for controlling opening and closing.

[0013] By adopting the above technical solution, a liquid inlet pipe is designed to discharge the liquid in the liquid collection chamber. Compared with the method of removing the cover plate, only the plug needs to be opened, which is quick and avoids the liquid from entering the bearing due to excessive liquid storage in the liquid collection chamber.

[0014] Preferably, the height of the inlet end of the liquid inlet tube is higher than the height of the cover plate.

[0015] By adopting the above technical solution, the height of the liquid inlet end of the liquid inlet tube is higher than the height of the cover plate, which makes the bearing housing body easier to design as a whole and leaves enough processing space.

[0016] Preferably, the height of the inlet end of the liquid guide tube is not higher than the height of the outlet end of the liquid collection hole.

[0017] By adopting the above technical solution, when the plug at the liquid outlet end of the liquid inlet tube is opened, more liquid in the liquid collection chamber can be discharged, preventing the liquid from flowing back into the bearing chamber along the liquid collection hole.

[0018] Preferably, the liquid collection chamber is equipped with a sensor for detecting the water level, and the sensor is connected to a display module or a control module.

[0019] By adopting the above technical solution, the sensor can transmit the water level data in the liquid collection chamber to the display module or control module for prompting the operator, or for the control module to make a judgment and issue a command.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. When the sealing assembly between the bearing housing and the rotating shaft leaks, the liquid can first flow through the pipeline to the liquid collection chamber, avoiding the liquid from directly entering the bearing or motor and causing abnormal bearing operation or motor moisture, thus ensuring the operational stability of the bearing and motor. 2. When a large amount of liquid is stored in the collection chamber and maintenance is required, the cover can be opened to drain the liquid from the collection chamber without turning on the entire motor. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0022] Figure 2 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0023] Figure 3 yes Figure 2 Enlarged view of part A.

[0024] Figure 4 This is a schematic diagram of the bearing housing body in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Bearing housing body; 11. Bearing chamber; 12. Liquid collection chamber; 13. Liquid collection groove; 14. Liquid collection hole; 2. Rotating shaft; 3. Motor; 31. Cylinder; 32. Shell; 33. Stator; 34. Rotor; 4. Bearing; 41. Angular contact ball bearing; 42. Deep groove ball bearing; 5. Sealing assembly; 51. Stationary ring; 6. Liquid inlet tube; 7. Plug; 8. Cover plate; 9. Sensor. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] like Figure 1 , Figure 2 As shown, the bearing housing includes a bearing housing body 1 and a rotating shaft 2, with the upper end of the rotating shaft 2 connected to the output end of the motor 3.

[0028] In this embodiment, the bearing housing is used in a pump, especially a vertical submersible sewage pump. The pump includes a cylinder 31, and the bearing housing body 1 is fixed on the cylinder 31. The motor 3 includes a housing 32, a stator 33 and a rotor 34. The housing 32 is located in the cylinder 31, and the lower end of the cylinder 31 is fixed on the bearing housing body 1. The stator 33 is fixed inside the housing 32, and the rotor 34 is rotatably disposed inside the stator 33. The upper end of the rotating shaft 2 is connected to the rotor 34.

[0029] like Figure 2 , Figure 3 As shown, the bearing housing body 1 has a bearing chamber 11, and a bearing 4 is disposed in the bearing chamber 11. In this embodiment, the bearing 4 is preferably three and coaxially distributed in the vertical direction. The two bearings 4 located at the top are angular contact ball bearings 41, which are used to bear the axial load of the rotating shaft 2, and the bearing 4 located at the bottom is a deep groove ball bearing 42, which is used to bear the radial load of the rotating shaft 2.

[0030] like Figure 2 , Figure 3 As shown, the lower end of the rotating shaft 2 passes through the upper end of the bearing housing body 1, the bearing 4, and the lower end of the bearing housing body 1 in sequence, and is fixedly connected to the inner ring of the bearing 4. A sealing assembly 5 is provided between the lower end of the bearing housing body 1 and the rotating shaft 2.

[0031] In this embodiment, the sealing component 5 is preferably a mechanical seal, the stationary ring 51 of the mechanical seal is fixed to the lower end of the bearing housing body 1, and the rotating ring of the mechanical seal is connected to the rotating shaft 2.

[0032] like Figure 3 , Figure 4 As shown, the anti-leakage device also includes a liquid collection chamber 12 disposed on the bearing housing body 1. The liquid collection chamber 12 is connected to the bearing chamber 11 through a pipeline, and the inlet end of the pipeline is located below the bearing.

[0033] In this embodiment, the pipeline includes a liquid collection tank 13 and a liquid collection hole 14. The liquid collection tank 13 is located at the bottom of the bearing housing body 1 and in the bearing chamber 11. The liquid collection tank 13 is located below the bearing and is spaced apart from the bearing. The liquid collection hole 14 is located at the bottom of the bearing housing body 1. The liquid inlet end of the liquid collection hole 14 is connected to the liquid collection tank 13, and the liquid outlet end of the liquid collection hole 14 is connected to the liquid collection cavity 12.

[0034] Preferably, the liquid collection hole 14 is arranged in a horizontal direction; as another option, the liquid collection hole 14 can also be arranged at an angle, as long as the liquid inlet end of the liquid collection hole 14 is higher than the liquid outlet end.

[0035] When the sealing assembly 5 leaks, the liquid flows through the sealing assembly 5 into the bearing chamber 11, and will first flow into the liquid collection tank 13, and then flow through the liquid collection hole 14 into the liquid collection cavity 12.

[0036] In this embodiment, the bearing housing also includes a liquid inlet pipe 6, the inlet end of which is connected to the liquid collection chamber 12, and the outlet end of which extends to the outside of the bearing housing body 1. The outlet end of the liquid inlet pipe 6 is also provided with a plug 7 for controlling opening and closing.

[0037] In this embodiment, the plug 7 is a screw plug with a thread on the outlet end of the liquid inlet tube 6; as another option, the plug 7 can also be a solenoid valve or the like to control the opening and closing of the liquid inlet tube 6.

[0038] Opening the plug 7 allows the liquid in the liquid collection chamber 12 to be drained, preventing excessive liquid from accumulating in the liquid collection chamber 12 and causing liquid to enter the bearing.

[0039] like Figure 3 , Figure 4 As shown, the liquid collection cavity 12 is located on the lower end face of the bearing housing body 1.

[0040] In this embodiment, the liquid collecting cavity 12 and the bearing housing body 1 are an integral structure. As another option, the liquid collecting cavity 12 can also be designed as a cylindrical structure, which is a separate structure from the bearing housing body 1 and is fixed to the bearing housing body 1 by screws or the like.

[0041] Preferably, the lower end of the bearing housing body 1 is detachably provided with a cover plate 8 for sealing the liquid collection chamber 12. The cover plate 8 can be fixed to the bearing housing body 1 by means of screws or the like, and a sealing ring is provided between the cover plate 8 and the bearing housing body 1.

[0042] When a large amount of liquid is stored in the liquid collection chamber 12, and maintenance is required, the cover plate 8 can be opened to drain the liquid from the liquid collection chamber 12 without having to turn on the entire motor 3.

[0043] like Figure 3 , Figure 4 As shown, the height of the inlet end of the liquid inlet tube 6 is higher than the height of the cover plate 8, and the height of the inlet end of the liquid inlet tube 6 is not higher than the height of the outlet end of the liquid collection hole 14.

[0044] When the plug 7 at the outlet end of the liquid inlet tube 6 is opened, more liquid in the liquid collection chamber 12 can be discharged, preventing the liquid from flowing back into the bearing chamber 11 along the liquid collection hole 14.

[0045] like Figure 3 As shown, a sensor 9 for detecting water level is installed in the liquid collection chamber 12, and the sensor 9 is connected to the display module or control module.

[0046] Sensor 9 can transmit the water level data in the collection chamber 12 to the display module or control module to prompt the operator, or to allow the control module to make a judgment and issue a command.

[0047] The working principle of this embodiment is as follows: When the pump is running, it can transport liquid. When the sealing component 5 between the lower end of the bearing housing body 1 and the rotating shaft 2 leaks, the liquid can first flow through the pipeline to the liquid collection chamber 12, avoiding the liquid from directly entering the bearing or motor 3 and causing abnormal bearing operation or motor 3 getting damp, thus ensuring the operational stability of the bearing and motor 3.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A leak-proof bearing housing, characterized in that, The device includes a bearing housing body (1) and a rotating shaft (2). The bearing housing body (1) has a bearing chamber (11) and a bearing is installed in the bearing chamber (11). The upper end of the rotating shaft (2) is connected to the output end of the motor (3). The lower end of the rotating shaft (2) passes through the upper end of the bearing housing body (1), the bearing (4), and the lower end of the bearing housing body (1) in sequence. The rotating shaft (2) is fixedly connected to the bearing (4). A sealing assembly (5) is provided between the lower end of the bearing housing body (1) and the rotating shaft (2). The anti-leakage device also includes a liquid collection chamber (12) installed on the bearing housing body (1). The liquid collection chamber (12) is connected to the bearing chamber (11) through a pipeline. The liquid inlet end of the pipeline is located below the bearing (4).

2. The leak-proof bearing housing according to claim 1, characterized in that, The pipeline includes a liquid collection tank (13) and a liquid collection hole (14). The liquid collection tank (13) is located at the bottom of the bearing housing body (1) and in the bearing chamber (11). The liquid collection tank (13) is located below the bearing (4) and is spaced apart from the bearing (4). The liquid collection hole (14) is located at the bottom of the bearing housing body (1). The liquid inlet end of the liquid collection hole (14) is connected to the liquid collection tank (13), and the liquid outlet end of the liquid collection hole (14) is connected to the liquid collection cavity (12).

3. The leak-proof bearing housing according to claim 1, characterized in that, The liquid collection chamber (12) is located on the lower end face of the bearing housing body (1), and the lower end of the bearing housing body (1) is detachably provided with a cover plate (8) for sealing the liquid collection chamber (12).

4. The leak-proof bearing housing according to claim 3, characterized in that, The bearing housing also includes a liquid inlet tube (6), the inlet end of which is connected to the liquid collection chamber (12), the outlet end of which extends to the outside of the bearing housing body (1), and the outlet end of which is also provided with a plug (7) for controlling opening and closing.

5. The leak-proof bearing housing according to claim 4, characterized in that, The height of the inlet end of the liquid inlet tube (6) is higher than the height of the cover plate (8).

6. The leak-proof bearing housing according to claim 5, characterized in that, The height of the inlet end of the liquid inlet tube (6) is not higher than the height of the outlet end of the liquid collection hole (14).

7. The leak-proof bearing housing according to any one of claims 1-6, characterized in that, The liquid collection chamber (12) is equipped with a sensor (9) for detecting the water level, and the sensor (9) is connected to the display module or the control module.

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