A thrust bearing durability test device

Abstract

The invention discloses a thrust bearing durability test device, comprising a driving motor, a support frame, a water tank, a shaft, a thrust plate and a bearing assembly, wherein the driving motor is mounted on the top of the support frame; the water tank is arranged in the support frame through a water tank mounting bracket; the output shaft of the driving motor is connected to the shaft through a coupling; the thrust plate is sleeved on the shaft; the bearing assembly is located in the water tank, and the bearing assembly comprises an upper thrust bearing, a lower thrust bearing, an upper thrust bearing seat and a lower thrust bearing seat; the upper thrust bearing and the lower thrust bearing are arranged in correspondence with each other at the upper and lower ends of the thrust plate; the upper thrust bearing seat is sleeved on the shaft, and a plurality of supporting springs are evenly distributed between the upper thrust bearing seat and the upper thrust bearing; the lower thrust bearing seat is hollow inside. T The thrust bearing durability test device of the present invention has a simple structure, is easy to install and use, has a stable load, is convenient to apply the load, is simple to operate and maintain, has strong versatility, and has a wide adjustable measurement range of the axial force.

Description

Technical Field

[0001] The invention relates to a thrust bearing durability testing device. Background Art

[0002] The thrust bearing is a key component for the operation of the shielded pump unit, used to withstand the axial force generated by the rotor during operation. When the thrust bearing is damaged, the equipment is difficult to operate normally and it is complicated to replace. For some special use environments, it is even more difficult to repair and replace. Therefore, strict requirements are placed on the service life of the bearing. The thrust bearing durability (life) test must be carried out to verify that the bearing has a long service life and operates reliably and stably under the corresponding axial load.

[0003] Most of the existing thrust bearing test devices have complex structures, and some even use 1:1 model pumps for bearing tests. The test cost is extremely high and maintenance is inconvenient. Therefore, it is necessary to design a simple-to-use thrust bearing durability test device to meet the life test of the bearing. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a thrust bearing durability test device with simple structure, easy installation and use, stable load, convenient load application, simple operation and maintenance, strong versatility, and a wide adjustable axial force measurement range.

[0005] The technical solution to achieve the above purpose is: a thrust bearing durability test device, including a drive motor, a support frame, a water tank, a shaft, a thrust plate and a bearing assembly, wherein:

[0006] The driving motor is installed at the top of the supporting frame, and the output shaft of the driving motor is arranged downward;

[0007] The water tank is a T-shaped structure with a hollow interior, and the water tank is arranged in the support frame through a water tank mounting bracket;

[0008] The shaft is vertically arranged in the support frame, the output shaft of the drive motor is connected to the shaft through a coupling, and the lower end of the shaft extends into the vertical part of the water tank;

[0009] The thrust plate is sleeved on the shaft;

[0010] The bearing assembly is located in the water tank, and the bearing assembly includes an upper thrust bearing, a lower thrust bearing, an upper thrust bearing seat and a lower thrust bearing seat;

[0011] The upper thrust bearing and the lower thrust bearing are arranged at the upper and lower ends of the thrust plate in a one-to-one correspondence;

[0012] The upper thrust bearing seat is sleeved on the shaft, an upper thrust bearing mounting hole is opened at the lower end of the upper thrust bearing seat, the upper thrust bearing is mounted in the upper thrust bearing mounting hole, and a plurality of support springs are evenly distributed between the upper thrust bearing seat and the upper thrust bearing;

[0013] The lower thrust bearing seat is a T-shaped structure with a hollow interior. The lower thrust bearing seat is sleeved on the shaft, and the lower thrust bearing is installed in the transverse portion of the lower thrust bearing seat; the vertical portion of the lower thrust bearing seat is located in the vertical portion of the water tank, and a water-guided bearing is provided between the vertical portion of the lower thrust bearing seat and the shaft;

[0014] The upper thrust bearing seat and the lower thrust bearing seat are connected to the water tank via clamping bolts.

[0015] In the above-mentioned thrust bearing durability test device, a temperature sensor is arranged on the water tank; and drainage holes and water injection holes are arranged in a one-to-one correspondence at the upper and lower parts of the water tank.

[0016] The above-mentioned thrust bearing durability test device, wherein the upper thrust bearing and the lower thrust bearing both include thrust bearing pads, and a pressure plate is provided on the working surface of the thrust bearing pads;

[0017] The working surfaces of the thrust bearing pads of the upper thrust bearing and the lower thrust bearing are arranged opposite to each other.

[0018] The above-mentioned thrust bearing durability test device, wherein the thrust bearing pad of the upper thrust bearing is connected to the pressure plate and the upper thrust bearing seat by screws, there is an axial gap between the thrust bearing pad of the upper thrust bearing and the axial direction of the upper thrust bearing seat, and there is a radial gap between the thrust bearing pad of the upper thrust bearing and the pressure plate in the radial direction.

[0019] In the above-mentioned thrust bearing durability test device, the bottom end of the water tank mounting bracket is fixed to the bottom plate of the support frame, and the transverse part of the water tank is fixed to the top end of the water tank mounting bracket by mounting bolts.

[0020] The above-mentioned thrust bearing durability test device, wherein the upper thrust bearing seat, the lower thrust bearing seat and the water tank are respectively provided with bolt installation holes which pass through from top to bottom, the water tank installation bracket is provided with a bolt installation blind hole, the bottom end of the clamping bolt passes through the bolt installation holes of the upper thrust bearing seat, the lower thrust bearing seat and the water tank in sequence and is then clamped in the bolt installation blind hole on the water tank installation bracket;

[0021] An anti-rotation gasket is provided between the top end of the clamping bolt and the top end of the upper thrust bearing seat;

[0022] An axial gap is provided between the bottom end of the upper thrust bearing seat and the top end of the lower thrust bearing seat.

[0023] The thrust bearing durability test device of the present invention has the following advantages:

[0024] (1) Simple structure, easy to install and use;

[0025] (2) The lower thrust bearing can be tested by adjusting the load acting on the upper thrust bearing;

[0026] (3) The axial force loading is simple, no counterweight device is required, and the axial force load is stable;

[0027] (4) The error during equipment disassembly and reinstallation is small and will not affect the operating accuracy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the thrust bearing durability test device of the present invention;

[0029] Figure 2 It is the installation diagram of the upper thrust bearing assembly;

[0030] Figure 3 for Figure 2 A partial enlarged view of

[0031] Figure 4 The figure is a schematic diagram of the installation of the upper thrust bearing seat and the lower thrust bearing seat;

[0032] Figure 5 This is a schematic diagram of the water tank structure. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the specific implementation methods thereof are described in detail below in conjunction with the accompanying drawings:

[0034] See also Figures 1 to 5 The best embodiment of the present invention is a thrust bearing durability test device, which includes a drive motor 1, a support frame 14, a water tank 9, a shaft 3, a thrust plate 7 and a bearing assembly.

[0035] The drive motor 1 is mounted on the top of the support frame 14, and the output shaft of the drive motor 1 is arranged downward; the water tank 9 is a T-shaped structure with a hollow interior, and the water tank 9 is arranged in the support frame 14 through a water tank mounting bracket 15; the bottom end of the water tank mounting bracket 15 is fixed to the bottom plate of the support frame 14, and the transverse part of the water tank 9 is fixed to the top of the water tank mounting bracket 14 by mounting bolts 94 (see Figure 4 ), a temperature sensor 91 is provided on the water tank 9 to detect the temperature change of the medium in the water tank; the upper and lower parts of the water tank 9 are provided with a drain hole 93 and a water injection hole 92 (see Figure 5 ), used to adjust the medium temperature by adding and removing the medium.

[0036] The shaft 3 is vertically arranged in the support frame 14, and the output shaft of the driving motor 1 is connected to the top of the shaft 3 through the coupling 2. The coupling 2 is only used to transmit torque and can be directly pulled out from the shaft 3. The lower end of the shaft 3 extends into the vertical part of the water tank 9; the shaft 3 is mainly used to fix the thrust plate 7, and the thrust plate 7 is sleeved on the shaft 3.

[0037] The bearing assembly is located in the water tank 9, and the bearing assembly includes an upper thrust bearing 6, a lower thrust bearing 8, an upper thrust bearing seat 4 and a lower thrust bearing seat 10; the upper thrust bearing 6 and the lower thrust bearing 8 are arranged one by one at the upper and lower ends of the thrust plate 7, and are used to withstand the axial force generated when the rotor is working; the upper thrust bearing seat 4 is sleeved on the shaft, and an upper thrust bearing mounting hole is opened at the lower end of the upper thrust bearing seat 4, and the upper thrust bearing 6 is installed in the upper thrust bearing mounting hole. A number of support springs 5 ​​are evenly distributed between the upper thrust bearing seat 4 and the upper thrust bearing 6, which are used to simulate the axial force generated when the rotor is working. The number and stiffness of the support springs 5 ​​are determined according to the number of thrust bearing pads and the axial load required to be applied.

[0038] The lower thrust bearing seat 10 is a T-shaped structure with a hollow interior. The lower thrust bearing seat 10 is sleeved on the shaft 3, and the lower thrust bearing 8 is installed in the lateral part of the lower thrust bearing seat 10; the vertical part of the lower thrust bearing seat 10 is located in the vertical part of the water tank 9, and a water-guided bearing 13 is arranged between the vertical part of the lower thrust bearing seat 10 and the shaft 3 to ensure the stability of the rotor operation and simulate the actual working conditions of the rotor.

[0039] The upper thrust bearing seat 4 and the lower thrust bearing seat 10 are connected to the water tank 9 via the clamping bolts 12 .

[0040] The upper thrust bearing 6 and the lower thrust bearing 8 both include thrust bearing pads, and a pressure plate is arranged on the working surface of the thrust bearing pads; the working surfaces of the thrust bearing pads of the upper thrust bearing 6 and the lower thrust bearing 8 are arranged opposite to each other.

[0041] Please see again Figure 2 and Figure 3 The thrust bearing pad 61 of the upper thrust bearing 6 is connected to the pressure plate 62 and the upper thrust bearing seat 4 by screws 63 to prevent the thrust bearing pad from falling off. After installation, there is an axial gap a between the thrust bearing pad 61 of the upper thrust bearing 6 and the upper thrust bearing seat 4 in the axial direction, and there is a radial gap b between the thrust bearing pad 61 of the upper thrust bearing 6 and the pressure plate 62 in the radial direction. Ensure that the thrust bearing pad 61 of the upper thrust bearing 6 can move freely in the axial gap a without being constrained by the friction of the pressure plate.

[0042] When the support spring 5 is installed, a certain amount of pre-compression can be set according to the axial load requirements. The load F acting on the thrust bearing pad of the upper thrust bearing 弹簧力 It is equal to the product of the total spring compression a' and the total stiffness K, that is:

[0043] F 弹簧力 =ka'

[0044] Please see again Figure 4 The upper thrust bearing seat 4 and the lower thrust bearing seat 10 are positioned radially by the mounting stop, and axially by the clamping bolt 12. Bolt mounting holes that pass through from top to bottom are respectively provided on the upper thrust bearing seat 4, the lower thrust bearing seat 10 and the water tank 9. A bolt mounting blind hole is reserved on the water tank mounting bracket 15 so that the clamping bolt 12 has sufficient installation space. The bottom end of the clamping bolt 12 passes through the bolt mounting holes on the upper thrust bearing seat 4, the lower thrust bearing seat 10 and the water tank 9 in turn and is clamped in the bolt mounting blind hole on the water tank mounting bracket 15; an anti-rotation gasket 11 is provided between the top end of the clamping bolt 12 and the top end of the upper thrust bearing seat 4 to ensure that the clamping bolt will not loosen due to the operation of the entire test device.

[0045] There is an axial gap c between the bottom end of the upper thrust bearing seat 4 and the top end of the lower thrust bearing seat 10. By controlling the axial gap c between the two thrust bearing seats, the total compression amount a' of the spring can be indirectly controlled to adjust the axial force of the applied load.

[0046] Please see again Figure 5 The water tank 9 is provided with a temperature sensor 91, a water injection hole 92 and a drain hole 93. The long-term operation of the equipment will increase the temperature of the medium in the water tank. The temperature sensor 91 is used to detect the temperature of the medium, and cooperates with the water injection hole 92 and the drain hole 93 to control the temperature of the medium within an ideal range.

[0047] The thrust bearing durability test device of the present invention is provided with a plurality of support springs 5 ​​on the back of the thrust bearing pad 61 of the upper thrust bearing 6 and the upper thrust bearing seat 4, and the load acting on the upper thrust bearing 6 can be controlled by controlling the compression amount of the support springs 5.

[0048] A thrust plate 7 is arranged between the upper thrust bearing 6 and the lower thrust bearing 8. The load on the support spring 5 is transmitted to the thrust plate 7 through the upper thrust bearing 6, and then transmitted to the lower thrust bearing 8 through the thrust plate 7. The entire thrust bearing durability test device does not require additional weights and is easy to adjust. The load F acting on the lower thrust bearing 8 is 总载荷 Approximately: The load F acting on the thrust bearing pad of the upper thrust bearing 弹簧力 , the combined force of the weight G of the rotor on the thrust bearing and thrust plate, and the corresponding buoyancy f, is:

[0049] F总载荷 =F 弹簧力 +Gf

[0050] The F 总载荷 It is used to simulate the axial force generated by the canned motor pump rotor during operation, and then conduct durability tests on bearing components.

[0051] The thrust bearing durability test device of the present invention has a simple structure and is easy to install and use. The load F acting on the upper thrust bearing can be adjusted. 总载荷 , and conduct durability tests on the lower thrust bearing. The axial force loading is simple, and there is no need to set a counterweight device. The axial force load is stable. The equipment disassembly and reinstallation error is small, which will not affect the equipment operation accuracy.

[0052] By adjusting the degree of tightening of the clamping bolt 12, the axial gap c between the bottom end of the upper thrust bearing seat 4 and the top end of the lower thrust bearing seat 10 is adjusted, the compression amount of the support spring 5 is controlled, and the clamping bolt 12 is fixed by the anti-rotation gasket 11.

[0053] After the upper thrust bearing and the lower thrust bearing have been running for a long time, slight wear will occur between the joint surface of the bearing and the thrust plate, usually at the micron level. The wear has little effect on the compression of the spring, so the load is stable.

[0054] After the unit has been running for a long time, the drive motor 1 may be damaged. You can just replace the drive motor. The replacement of the drive motor does not affect the accuracy of the equipment, and the test device can operate reliably. The medium in the water tank can be replaced to maintain the medium at an ideal temperature.

[0055] In summary, the thrust bearing durability test device of the present invention has a simple structure, is easy to install and use, has a stable load, is convenient to apply load, is simple to operate and maintain, has strong versatility, and has a wide adjustable measurement range of axial force.

[0056] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A thrust bearing durability test device, characterized in that: It includes a drive motor, a support frame, a water tank, a shaft, a thrust plate and a bearing assembly, wherein: The driving motor is installed at the top of the supporting frame, and the output shaft of the driving motor is arranged downward; The water tank is a T-shaped structure with a hollow interior, and the water tank is arranged in the support frame through a water tank mounting bracket; The shaft is vertically arranged in the support frame, the output shaft of the drive motor is connected to the shaft through a coupling, and the lower end of the shaft extends into the vertical part of the water tank; The thrust plate is sleeved on the shaft; The bearing assembly is located in the water tank, and the bearing assembly includes an upper thrust bearing, a lower thrust bearing, an upper thrust bearing seat and a lower thrust bearing seat; The upper thrust bearing and the lower thrust bearing are arranged at the upper and lower ends of the thrust plate in a one-to-one correspondence; The upper thrust bearing seat is sleeved on the shaft, an upper thrust bearing mounting hole is opened at the lower end of the upper thrust bearing seat, the upper thrust bearing is mounted in the upper thrust bearing mounting hole, and a plurality of support springs are evenly distributed between the upper thrust bearing seat and the upper thrust bearing; The lower thrust bearing seat is a T-shaped structure with a hollow interior. The lower thrust bearing seat is sleeved on the shaft, and the lower thrust bearing is installed in the transverse portion of the lower thrust bearing seat; the vertical portion of the lower thrust bearing seat is located in the vertical portion of the water tank, and a water-guided bearing is provided between the vertical portion of the lower thrust bearing seat and the shaft; The upper thrust bearing seat and the lower thrust bearing seat are connected to the water tank via clamping bolts; The water tank is provided with a temperature sensor; the upper part and the lower part of the water tank are provided with a drainage hole and a water injection hole in a one-to-one correspondence; The upper thrust bearing and the lower thrust bearing both include thrust bearing pads, and a pressure plate is arranged on the working surface of the thrust bearing pads; The working surfaces of the thrust bearing pads of the upper thrust bearing and the lower thrust bearing are arranged opposite to each other.

2. A thrust bearing durability test device according to claim 1, characterized in that: The thrust bearing pad of the upper thrust bearing is connected to the pressure plate and the upper thrust bearing seat through screws. There is an axial gap between the thrust bearing pad of the upper thrust bearing and the upper thrust bearing seat in the axial direction, and there is a radial gap between the thrust bearing pad of the upper thrust bearing and the pressure plate in the radial direction.

3. A thrust bearing durability test device according to claim 1, characterized in that: The bottom end of the water tank mounting bracket is fixed on the bottom plate of the support frame, and the transverse portion of the water tank is fixed to the top end of the water tank mounting bracket by mounting bolts.

4. A thrust bearing durability test device according to claim 1, characterized in that: The upper thrust bearing seat, the lower thrust bearing seat and the water tank are respectively provided with bolt mounting holes which penetrate from top to bottom, and the water tank mounting bracket is provided with a bolt mounting blind hole, and the bottom end of the clamping bolt passes through the bolt mounting holes of the upper thrust bearing seat, the lower thrust bearing seat and the water tank in sequence and is then clamped in the bolt mounting blind hole on the water tank mounting bracket; An anti-rotation gasket is provided between the top end of the clamping bolt and the top end of the upper thrust bearing seat; An axial gap is provided between the bottom end of the upper thrust bearing seat and the top end of the lower thrust bearing seat.

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