Horizontal centrifugal pump shaft and bearing cooling device

Abstract

The utility model discloses a horizontal centrifugal pump shaft and bearing cooling device which comprises an external cooling water flow channel, an internal cooling water pipe is arranged on the inner surface of a cavity, a first bearing to be cooled is fixedly connected to the side surface of the cavity, and a second bearing to be cooled is fixedly connected to the end, away from the cavity, of the first bearing to be cooled. One end of the external cooling water flow channel is fixedly connected with a cooling water inlet pipe component, the bottom end of the bearing body is fixedly connected with a cooling water outlet pipe component, and the cooling water inlet pipe component is fixed to the lower surface of the bottom end of the bearing body. The double cooling measures of the internal cooling water pipeline and the external cooling water flow channel are adopted, so that the single form of a traditional spiral flow channel is changed, the double flow channel form of the spiral flow channel and the annular flow channel is adopted, the heat exchange effect is enhanced, the operation efficiency of a working machine is not affected, and the cooling effect of a centrifugal pump shaft and a bearing is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing cooling, in particular to a horizontal centrifugal pump shaft and bearing cooling device. Background Art

[0002] With the rapid development of modern industry, more and more working conditions will make the shafts and bearings of horizontal centrifugal pumps work in high temperature, high pressure and high speed environment, such as high-speed centrifugal pumps for transporting boiler hot water in power plants, waste heat removal pumps for nuclear power plants, etc.

[0003] Existing shaft and bearing cooling devices usually adopt a spiral flow channel water cooling structure, usually using a single flow channel form, failing to comprehensively utilize the advantages of different flow channel forms, and having a poor heat exchange effect. For example, a Chinese patent discloses a "pump bearing cooling device" with an application number of "CN201320462956.4", which includes: a spiral tube type within the space formed by the suspension body and the bearing seat, with its inlet and outlet extending from the bearing seat, having a single structure, poor cooling effect, and using a traditional spiral tube cooling device, which has limited applicability. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a horizontal centrifugal pump shaft and bearing cooling device. The device adopts a dual cooling measure of an internal cooling water pipeline and an external cooling water flow channel by setting an external cooling water flow channel, changes the single form of the traditional spiral flow channel, and adopts a dual flow channel form of a spiral flow channel and an annular flow channel, which is beneficial to enhancing the heat exchange effect, does not affect the operating efficiency of the working machine, and enhances the cooling effect of the centrifugal pump shaft and bearings.

[0005] The utility model also provides a horizontal centrifugal pump shaft and bearing cooling device as described above, comprising: a base, the upper surface of the base is fixedly connected to a bearing body bracket, the upper surface of the bearing body bracket is fixedly connected to a bearing cooling device, the bearing cooling device comprises: a shaft to be cooled, the side surface of the shaft to be cooled is fixedly connected to a bearing pressure cover, the outer surface of the shaft to be cooled is sleeved with a bearing body, the side surface of the shaft to be cooled is fixedly connected to a fixed clamping block, the inner surface of the bearing body is fixedly connected to a bearing stopper sleeve, the side wall of the bearing body is fixedly connected to a bearing body outer tube, the side surface of the bearing body is provided with a connecting port, and the inner wall of the outer tube of the bearing body is provided with an external cooling water flow channel; through the mutual cooperation between the above parts, by providing an external cooling water flow channel, adopting the dual cooling measures of the internal cooling water pipeline and the external cooling water flow channel, the cooling effect of the centrifugal pump shaft and the bearing is enhanced.

[0006] The inner surface of the bearing body is provided with a cavity, the inner surface of the cavity is provided with an inner cooling water pipe, the side surface of the cavity is fixedly connected with a first bearing to be cooled, the end of the first bearing to be cooled away from the cavity is fixedly connected with a second bearing to be cooled, one end of the external cooling water flow channel is fixedly connected with a cooling water inlet pipe component, the bottom end of the bearing body is fixedly connected with a cooling water outlet pipe component, and the cooling water inlet pipe component is fixed to the lower surface of the bottom end of the bearing body. Through the mutual cooperation between the above parts, the single form of the traditional spiral flow channel is changed, and the double flow channel form of the spiral flow channel and the annular flow channel is adopted, which is beneficial to enhance the heat exchange effect.

[0007] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, the external cooling water flow channel is an annular flow channel. The heat exchange effect is enhanced through the mutual cooperation between the above parts.

[0008] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, the inner cooling water pipe is a spiral flow channel. Through the mutual cooperation between the above parts, the operating efficiency of the working machine is not affected, and the cooling effect of the centrifugal pump shaft and bearing is enhanced.

[0009] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, the first bearing to be cooled is a cylindrical roller bearing, and the second bearing to be cooled is a deep groove ball bearing. The mutual cooperation between the above parts facilitates cooling.

[0010] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, the lower surface of the outer tube of the bearing body is fixedly connected with a temperature sensor, the inner surface of the outer tube of the bearing body is fixedly connected with a vent valve, and the side surface of the outer tube of the bearing body is fixedly connected with an oil cup. The mutual cooperation between the above parts facilitates the release of the pressure in the cavity.

[0011] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, the upper surface of the base is fixedly connected with a motor, and the output end of the motor is fixedly connected with a rotating shaft. The power source is provided by the mutual cooperation between the above parts.

[0012] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, blades are fixedly connected to the side surface of the rotating shaft. Through the mutual cooperation between the above parts, water is driven to flow into the centrifugal pump.

[0013] According to the horizontal centrifugal pump shaft and bearing cooling device described in the utility model, the side surface of the base is fixedly connected with a mounting plate, and the upper surface of the mounting plate is provided with mounting holes. The mutual cooperation between the above parts facilitates installation and disassembly.

[0014] Beneficial Effects

[0015] Compared with the prior art, the utility model sets an external cooling water flow channel and adopts dual cooling measures of internal cooling water pipeline and external cooling water flow channel, changes the single form of traditional spiral flow channel, and adopts a dual flow channel form of spiral flow channel and annular flow channel, which is beneficial to enhance the heat exchange effect, does not affect the operating efficiency of the working machine, and enhances the cooling effect of the centrifugal pump shaft and bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is the overall structural diagram of the horizontal centrifugal pump shaft and bearing cooling device of the utility model;

[0018] Figure 2 This is an internal cross-sectional view of the horizontal centrifugal pump shaft and bearing cooling device of the utility model;

[0019] Figure 3 It is a partial structural diagram of the horizontal centrifugal pump shaft and bearing cooling device of the utility model;

[0020] Figure 4 This is a blade structure diagram of the utility model horizontal centrifugal pump shaft and bearing cooling device;

[0021] Legend:

[0022] 1. Shaft to be cooled; 2. Bearing body; 3. Bearing sleeve; 4. Bearing cover; 5. Temperature sensor; 6. First bearing to be cooled; 7. Internal cooling water pipe; 8. External bearing body tube; 9. Cooling water inlet pipe component; 10. Second bearing to be cooled; 11. Cooling water outlet pipe component; 12. Oil cup; 13. Fixed block; 14. Connecting port; 15. Bearing body bracket; 16. Air release valve; 17. External cooling water flow channel; 18. Cavity; 19. Base; 20. Motor; 21. Mounting plate; 22. Mounting hole; 23. Blade; 24. Rotating shaft. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Reference Figure 1-4The utility model embodiment is a horizontal centrifugal pump shaft and bearing cooling device, which includes: a base 19, a mounting plate 21 is fixedly connected to the side surface of the base 19, and a mounting hole 22 is arranged on the upper surface of the mounting plate 21 for easy installation and disassembly, a motor 20 is fixedly connected to the upper surface of the base 19, a rotating shaft 24 is fixedly connected to the output end of the motor 20 to provide a power source, a blade 23 is fixedly connected to the side surface of the rotating shaft 24 to drive water flow into the centrifugal pump, a bearing body bracket 15 is fixedly connected to the upper surface of the base 19, and a bearing cooling device is fixedly connected to the upper surface of the bearing body bracket 15. The bearing cooling device includes: a shaft to be cooled 1, a bearing pressure cover 4 is fixedly connected to the side surface of the shaft to be cooled 1, a bearing body 2 is sleeved on the outer surface of the shaft 1 to be cooled, and a bearing body 2 is sleeved on the outer surface of the shaft 1 to be cooled A fixed block 13 is fixedly connected to the side surface of the cooling shaft 1, a bearing stopper sleeve 3 is fixedly connected to the inner surface of the bearing body 2, a bearing body outer tube 8 is fixedly connected to the side wall of the bearing body 2, a temperature sensor 5 is fixedly connected to the lower surface of the bearing body outer tube 8, a vent valve 16 is fixedly connected to the inner surface of the bearing body outer tube 8, an oil cup 12 is fixedly connected to the side surface of the bearing body outer tube 8, so as to release the pressure in the cavity 18, a connection port 14 is provided on the side surface of the bearing body 2, an external cooling water channel 17 is provided on the inner wall of the bearing body outer tube 8, and the external cooling water channel 17 is provided by providing the external cooling water channel 17 and adopting the dual cooling measures of the internal cooling water pipe 8 and the external cooling water channel 17 to enhance the cooling effect of the centrifugal pump shaft and the bearing, and the external cooling water channel 17 is an annular channel to enhance the heat exchange effect.

[0025] A cavity 18 is provided on the inner surface of the bearing body 2, and an inner cooling water pipe 7 is provided on the inner surface of the cavity 18. The inner cooling water pipe 7 is a spiral flow channel, which does not affect the operating efficiency of the working machine and enhances the cooling effect of the centrifugal pump shaft and bearing. A first bearing to be cooled 6 is fixedly connected to the side surface of the cavity 18. The first bearing 6 to be cooled is a cylindrical roller bearing, and the second bearing 10 to be cooled is a deep groove ball bearing for easy cooling. The end of the first bearing 6 to be cooled away from the cavity 18 is fixedly connected to the second bearing 10 to be cooled. One end of the external cooling water flow channel 17 is fixedly connected to a cooling water inlet pipe component 9, and the bottom end of the bearing body 2 is fixedly connected to a cooling water outlet pipe component 11. The cooling water inlet pipe component 9 is fixed on the lower surface of the bottom end of the bearing body 2, changing the single form of the traditional spiral flow channel and adopting a dual flow channel form of a spiral flow channel and annular flow channel, which is beneficial to enhancing the heat exchange effect.

[0026] Working principle: When in use, the shaft to be cooled 1 located thereon rotates at high speed, so that the shaft to be cooled 1, the first bearing to be cooled 6 and the second bearing to be cooled 10 work in a high temperature, high pressure and high speed environment. The lubricating oil is installed in the cavity 18, and the cooling water enters the external cooling water channel 17 and the internal cooling water pipe 7 from the cooling water inlet pipe component 9. The cooling water in the external cooling water channel 17 and the internal cooling water pipe 7 absorbs the heat of the lubricating oil, and the lubricating oil reduces the temperature of the shaft to be cooled 1, the first bearing to be cooled 6 and the second bearing to be cooled 10. Then the cooling water in the external cooling water channel 17 and the internal cooling water pipe 7 absorbs the heat and converges, and flows out from the cooling outlet pipe component 11, thereby realizing the cooling treatment of the shaft to be cooled 1, the first bearing to be cooled 6 and the second bearing to be cooled 10, and achieving the cooling purpose.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A horizontal centrifugal pump shaft and bearing cooling device, characterized in that: include: A base (19), the upper surface of the base (19) is fixedly connected to a bearing body bracket (15), the upper surface of the bearing body bracket (15) is fixedly connected to a bearing cooling device, the bearing cooling device comprising: a shaft to be cooled (1), the side surface of the shaft to be cooled (1) is fixedly connected to a bearing pressure cover (4), the outer surface of the shaft to be cooled (1) is sleeved with a bearing body (2), the side surface of the shaft to be cooled (1) is fixedly connected to a fixed clamping block (13), the inner surface of the bearing body (2) is fixedly connected to a bearing stopper sleeve (3), the side wall of the bearing body (2) is fixedly connected to a bearing body outer tube (8), the side surface of the bearing body (2) is provided with a connecting port (14), and the inner wall of the bearing body outer tube (8) is provided with an external cooling water flow channel (17); The inner surface of the bearing body (2) is provided with a cavity (18), the inner surface of the cavity (18) is provided with an internal cooling water pipe (7), the side surface of the cavity (18) is fixedly connected with a first bearing to be cooled (6), the end of the first bearing to be cooled (6) away from the cavity (18) is fixedly connected with a second bearing to be cooled (10), one end of the external cooling water channel (17) is fixedly connected with a cooling water inlet pipe component (9), the bottom end of the bearing body (2) is fixedly connected with a cooling water outlet pipe component (11), and the cooling water inlet pipe component (9) is fixed on the lower surface of the bottom end of the bearing body (2).

2. A horizontal centrifugal pump shaft and bearing cooling device according to claim 1, characterized in that: The external cooling water flow channel (17) is an annular flow channel.

3. A horizontal centrifugal pump shaft and bearing cooling device according to claim 1, characterized in that: The inner cooling water pipe (7) is a spiral flow channel.

4. A horizontal centrifugal pump shaft and bearing cooling device according to claim 1, characterized in that: The first bearing to be cooled (6) is a cylindrical roller bearing, and the second bearing to be cooled (10) is a deep groove ball bearing.

5. A horizontal centrifugal pump shaft and bearing cooling device according to claim 1, characterized in that: A temperature sensor (5) is fixedly connected to the lower surface of the outer tube (8) of the bearing body, an air release valve (16) is fixedly connected to the inner surface of the outer tube (8) of the bearing body, and an oil cup (12) is fixedly connected to the side surface of the outer tube (8) of the bearing body.

6. A cooling device for a horizontal centrifugal pump shaft and bearing according to claim 1, characterized in that: A motor (20) is fixedly connected to the upper surface of the base (19), and a rotating shaft (24) is fixedly connected to the output end of the motor (20).

7. A cooling device for a horizontal centrifugal pump shaft and bearing according to claim 6, characterized in that: The side surface of the rotating shaft (24) is fixedly connected with a blade (23).

8. A cooling device for a horizontal centrifugal pump shaft and bearing according to claim 1, characterized in that: A mounting plate (21) is fixedly connected to the side surface of the base (19), and a mounting hole (22) is provided on the upper surface of the mounting plate (21).

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