Bearing box of centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and discloses a centrifugal pump bearing box which is provided with a containing space for containing lubricating oil, the containing space is provided with a bottom opening, and radiating fins are arranged on the peripheral wall of the bearing box. The lower cover is detachably mounted at the bottom opening and is used for sealing the accommodating space; the coil pipe is arranged in the containing space, and the water inlet end and the water outlet end of the coil pipe are welded to the lower cover and communicated with the outside. The bearing box has the beneficial effects that the lower cover and the coil pipe serve as a whole to be more convenient to disassemble, assemble and maintain, and meanwhile the problem that sundries at the bottom of a lubricating oil cavity of the bearing box are deposited and difficult to remove is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a bearing box of a centrifugal pump. Background Art

[0002] The centrifugal pump is the most widely used type of pump. It has various structures and is widely used in various fields such as urban water supply, petrochemical industry, shipbuilding industry, aerospace, farmland irrigation, etc. When the centrifugal pump is running, the internal friction of its bearing generates temperature, and when the external temperature is too high, the bearing operating temperature will also increase, which is not conducive to the service life of the centrifugal pump. Therefore, it is very important to cool the centrifugal pump bearing box.

[0003] In the existing water-cooled centrifugal pump bearing box, when the cooling water is connected externally, the cooling coil is directly connected to the side wall of the bearing box through threads and sealed by rubber rings. This side-in and side-out arrangement in which the cooling coil is directly connected to the side wall of the bearing box through threads is not easy to disassemble and assemble as a whole, which brings inconvenience to maintenance. Utility Model Content

[0004] The utility model aims to provide a centrifugal pump bearing box to solve the problems of internal leakage of cooling water and difficulty in overall disassembly and assembly of the coil water-cooled centrifugal pump bearing box in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A centrifugal pump bearing box, comprising:

[0007] A bearing box, wherein the bearing box has a containing space for containing lubricating oil, the containing space has a bottom opening, and the outer peripheral wall of the bearing box is provided with heat dissipation fins;

[0008] A lower cover, which is detachably mounted on the bottom opening and is used to close the accommodating space;

[0009] The coil is arranged in the accommodating space, and the water inlet end and the water discharge end of the coil are welded to the lower cover and communicated with the outside.

[0010] Furthermore, it also includes an air cooling component, which is located outside the bearing box and connected to the pump shaft of the bearing box to generate airflow for heat exchange with the heat dissipation fins on the outer wall of the bearing box.

[0011] Furthermore, the air cooling component includes a fan, which is arranged on one side of the bearing box, and a driving shaft of the fan is connected to a pump shaft of the bearing box.

[0012] Furthermore, the air cooling assembly also includes a deflector, which is buckled on the outer periphery of the fan and is used to guide the airflow generated by the fan to pass over the heat dissipation fins on the outer wall of the bearing box.

[0013] Furthermore, the lower cover is provided with a threaded joint which is in communication with the water inlet end and the water discharge end of the coil and is used for connecting with an external water pipe.

[0014] Furthermore, it also includes an oil drain plug, which is installed on the lower cover.

[0015] Furthermore, it also includes a sealing ring, which is arranged between the water inlet end of the coil and the lower cover and between the water discharge end of the coil and the lower cover.

[0016] Furthermore, a sealing gasket is included, and the sealing gasket is arranged between the lower cover and the bottom opening.

[0017] The utility model has the following advantages over the prior art:

[0018] 1. The centrifugal pump bearing box of the utility model has a bottom opening, and the lower cover is closed at the bottom opening. The water cooling structure of the cooling coil adopts a bottom-in and bottom-out method and is welded to the lower cover. In the utility model, the lower cover and the coil are regarded as a whole, which is more convenient for disassembly and maintenance, and at the same time solves the problem of debris deposition at the bottom of the lubricating oil chamber of the bearing box, which is difficult to remove.

[0019] 2. The centrifugal pump bearing box of the utility model is equipped with an external fan and a guide cover. The fan is connected to the pump shaft and rotated by the pump shaft. During the operation of the centrifugal pump, the airflow generated by the fan passes over the fins on the outer wall of the bearing box, thereby forming heat exchange, that is, air cooling. Even if there is no external cooling water source or the supply of external cooling water is temporarily cut off, the cooling of the bearing lubricating oil can be ensured.

[0020] 3. The centrifugal pump bearing box of the utility model has a threaded joint on the lower cover, and the water inlet and outlet ends of the coil are connected to water pipes through threaded joints. The water cooling structure of the cooling coil adopts a bottom-in and bottom-out method. This solves the problem of cooling water leakage and lubricating oil contamination caused by the connection between the coil and the bearing box directly through threads and gaskets in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of a centrifugal pump bearing box in an embodiment of the utility model along a first viewing angle;

[0022] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 3 It is a cross-sectional view of the bearing box of the centrifugal pump in the embodiment of the utility model along the second viewing angle;

[0024] In the figure: 1. bearing box; 2. accommodation space; 3. lower cover; 4. coil; 5. water inlet end; 6. discharge end; 7. pump shaft; 8. cooling fins; 9. fan; 10. air guide cover; 11. sealing gasket; 12. threaded joint; 13. oil drain plug. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] In addition, it should be understood that for the convenience of description, the sizes of various components shown in the drawings are not drawn according to the actual proportional relationship.

[0028] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not need to be further discussed and described in detail in the description of the subsequent drawings.

[0029] Example:

[0030] When the bearing box is cooled by external cooling water, the connection between the coil and the bearing box is threaded and sealed by a rubber ring. When the connection between the coil and the bearing box is located inside the bearing box, this connection method has the problem of cooling water leakage, causing the lubricating oil emulsification, and the side-in and side-out arrangement of the external cooling coil is not easy to disassemble and assemble the coil as a whole, which brings inconvenience to maintenance; because the bottom of the lubricating oil chamber of the bearing box is a closed structure, it is difficult to remove the deposition of iron filings and other debris in the lubricating oil during long-term operation, and the bearing will inevitably be damaged during the lubrication process; due to the restrictions of the on-site environment, when there is no external cooling water supply, the bearing box can only passively form heat exchange with the outside air through the outer wall heat dissipation fins. At this time, the large amount of heat generated cannot be taken away in time, resulting in insufficient heat exchange efficiency of the bearing box.

[0031] like Figure 1 , Figure 2 As shown, the utility model provides a centrifugal pump bearing box, comprising:

[0032] A bearing box 1, wherein the bearing box 1 has a storage space 2 for containing lubricating oil, and the storage space 2 has a bottom opening, and the outer peripheral wall of the bearing box 1 is provided with heat dissipation fins 8; in order to close the storage space, a lower cover 3 is provided, and the lower cover 3 is detachably connected to the bottom opening, and a coil 4 is also provided in the storage space 2, and the water inlet end 5 and the drainage end 6 of the coil are welded to the lower cover 3 and connected to the outside. The coil 4 in the utility model adopts a bottom-in and bottom-out method, and the water inlet end 4 and the drainage end 5 of the coil are welded to the lower cover 3, so that the coil and the lower cover are connected as a whole, which is more convenient for disassembly and maintenance. At the same time, the detachable lower cover 3 solves the problem of debris deposition at the bottom of the storage space for containing lubricating oil, which is difficult to remove.

[0033] like Figure 3 As shown, it also includes an air cooling component, which is located on the outside of the bearing box 1 and connected to the pump shaft 7 of the bearing box 1. When the bearing box is working, the air cooling component can generate airflow to exchange heat with the heat dissipation fins 8 on the outer wall of the bearing box, thereby cooling the bearing lubricating oil.

[0034] In this embodiment, the air cooling component can be a fan 9, which is installed on one side of the bearing box 1, and is driven to rotate by the pump shaft 7 of the bearing box 1. When the bearing box 1 is working, the pump shaft 7 and the fan 9 rotate simultaneously, and the airflow generated by the rotation of the fan exchanges heat with the heat dissipation fins, thereby cooling the bearing lubricating oil.

[0035] In another embodiment, the air cooling component may be a fan 9 and an air deflector 10, wherein the air deflector 10 is buckled on the outer periphery of the fan 9. By setting the air deflector 10 to guide the direction of the airflow, the airflow passes over the heat dissipating fins 8 on the outer wall of the bearing box and fully contacts the heat dissipating fins 8, thereby improving the heat exchange efficiency of the heat dissipating fins 8.

[0036] The lower cover 3 is provided with a threaded joint 12 connected with the water inlet end 5 and the water outlet end 6 of the coil, and is used to connect with the external water pipe. In this embodiment, the water inlet end 5 and the water outlet end 6 are both arranged downward, and the threaded joint 12 is arranged inside the lower cover along the thickness of the lower cover or outside the lower cover, that is, the water inlet end and the water outlet end extend into the lower cover or outside the lower cover to connect with the threaded joint. Through this arrangement, even if cooling water leaks at the connection, the cooling water will flow out along the threaded joint 12 and will not pollute the lubricating oil in the accommodation space 2. The lower cover 3 is also provided with an oil drain hole, through which the lubricating oil in the accommodation space 2 can be drained; an oil drain plug 13 is inserted into the oil drain hole to prevent the lubricating oil from leaking out.

[0037] It also includes a sealing ring, which is arranged between the coil water inlet end 5 and the lower cover 3 and between the coil water outlet end 6 and the lower cover 3. It also includes a sealing gasket 11, which is arranged between the lower cover 3 and the bottom opening. By arranging the sealing ring and the sealing gasket 11, the sealing effect in the accommodating space 2 is improved to prevent the lubricating oil from leaking out.

[0038] The cooling method of the centrifugal pump bearing box of the utility model can be switched according to the needs of the site. When the site cannot be connected to external cold water or the temperature of the lubricating oil is not high, the conditions can be met by using fans or fin air cooling; when cooling water can be introduced on site, water cooling and air cooling can work at the same time. Its significance lies in that the corresponding cooling method can be matched according to the operating temperature of a single bearing or the temperature rise of the lubricating oil.

[0039] The cooling coil of the centrifugal pump bearing box of the utility model adopts the bottom-in and bottom-out method. The water inlet and water outlet ends of the cooling coil are welded to the lower cover and connected to the threaded joints inside or outside the lower cover. The cooling coil and the lower cover are connected as one body, which solves the problem of internal leakage risk and cumbersome disassembly and assembly at the connection between the coil and the bearing box when the bearing box is cooled by external cooling water; the detachable setting of the lower cover also solves the problem of debris accumulation at the bottom of the bearing box storage space, which is difficult to remove. Through the external fan, the fan is driven to rotate by the pump shaft, so that the bearing box takes into account both coil water cooling and fin air cooling, solving the problem of fixed cooling method and inability to switch cooling method in the prior art; at the same time, when the bearing box is in a state without external cooling water, the active cooling method of the fan and the air guide cover can be used as a cooling alternative.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump bearing box, characterized in that: include: A bearing box, wherein the bearing box has a containing space for containing lubricating oil, the containing space has a bottom opening, and the outer peripheral wall of the bearing box is provided with heat dissipation fins; A lower cover, which is detachably mounted on the bottom opening and is used to close the accommodating space; The coil is arranged in the accommodating space, and the water inlet end and the water discharge end of the coil are welded to the lower cover and communicated with the outside.

2. The centrifugal pump bearing box according to claim 1, characterized in that: It also includes an air cooling component, which is located outside the bearing box and connected to the pump shaft of the bearing box to generate airflow for heat exchange with the heat dissipation fins on the outer wall of the bearing box.

3. The centrifugal pump bearing box according to claim 2, characterized in that: The air cooling component comprises a fan, which is arranged on one side of the bearing box, and a driving shaft of the fan is connected to a pump shaft of the bearing box.

4. The centrifugal pump bearing box according to claim 3, characterized in that: The air cooling assembly also includes a guide cover, which is buckled on the outer periphery of the fan and is used to guide the airflow generated by the fan to pass over the heat dissipation fins on the outer wall of the bearing box.

5. The centrifugal pump bearing box according to claim 1, characterized in that: The lower cover is provided with a threaded joint which is in communication with the water inlet end and the water discharge end of the coil and is used for connecting with an external water pipe.

6. The centrifugal pump bearing box according to claim 1, characterized in that: Also included is an oil drain plug, which is mounted on the lower cover.

7. The centrifugal pump bearing box according to claim 1, characterized in that: It also includes a sealing ring, which is arranged between the water inlet end of the coil and the lower cover and between the water discharge end of the coil and the lower cover.

8. The centrifugal pump bearing box according to claim 1, characterized in that: A sealing gasket is also included, and the sealing gasket is arranged between the lower cover and the bottom opening.

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