Series bearing test device

Abstract

A string bearing test device disclosed by the present invention comprises a test bench and an oil cylinder, the test bench is provided with a driving motor and a fixed support, the oil cylinder is fixedly connected to the fixed support, the interior of a concentric positioning bushing is rotatably connected with a test main shaft, and the test main shaft is sequentially provided with a first positioning support bearing, a string bearing and a second positioning support bearing. A temperature sensor and a vibration sensor are mounted in the concentric positioning bushing; an oil inlet is formed in the concentric positioning bushing, an oil return opening is formed in the bottom of the fixed support, and a torque sensor is installed between the driving motor and the test main shaft; a pressure sensor is arranged at the piston end of the oil cylinder, and a loading piston is arranged on the outer side of the pressure sensor; according to the invention, complicated actual use conditions such as mounting structure characteristics, inner ring rotation speed, axial load and impact load, high-temperature lubrication and the like of the string bearing can be simulated simultaneously, and further, the performance and service life of the string bearing in a petroleum drilling power drilling tool can be researched.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing test equipment, and particularly to a series bearing test device. Background Art

[0002] The series bearing is a key component of the power drill for oil drilling. Its performance and service life directly affect the service life and quality of the power drill for oil drilling. Due to the relatively special installation structure of the series bearing in the oil drilling drill tool, it cannot be adapted to the existing test devices. Moreover, the current relevant test devices can only simulate the mechanical fatigue parameters such as the rotation speed and load of conventional bearings, and cannot simulate the working conditions during the use of the special multi-row thrust roller bearings in the power drill for oil drilling, such as: structural characteristics (installation and positioning requirements), inner ring rotation, axial load, high-temperature lubrication, etc., resulting in unsatisfactory test results. Summary of the Invention

[0003] The purpose of the present invention is to provide a series bearing test device, which can simultaneously simulate the installation structural characteristics, inner ring rotation speed, axial load and impact load, high-temperature lubrication and other complex actual use conditions of the series bearing, and then conduct research on the performance and service life of the series bearing in the power drill for oil drilling.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A series bearing test device includes a test bench and an oil cylinder. A driving motor and a fixed support are installed on the test bench. A concentric positioning bushing is provided at one end of the fixed support close to the driving motor, and an oil cylinder fixed bushing is provided at the other end of the fixed support away from the driving motor. The oil cylinder is fixedly connected in the oil cylinder fixed bushing; at both ends inside the concentric positioning bushing, a first inner bushing and a second inner bushing are respectively provided. A test main shaft is rotatably connected between the first inner bushing and the second inner bushing. A first positioning support bearing, a series bearing and a second positioning support bearing are sequentially arranged on the test main shaft. A temperature sensor and a vibration sensor are installed at the position of the concentric positioning bushing where the series bearing is located. The first positioning support bearing matches the first inner bushing, and the second positioning support bearing matches the second inner bushing; gland covers and axial loading end covers are respectively provided at both ends of the concentric positioning bushing. An oil inlet is opened on the concentric positioning bushing, and an oil return port is opened at the bottom of the fixed support. A torque sensor is installed between the driving motor and the test main shaft; a pressure sensor is provided at the piston end of the oil cylinder, and a loading piston is provided outside the pressure sensor. The loading piston is in contact with the axial loading end cover.

[0005] Optionally, a sealing ring is provided between the gland cover and the test main shaft.

[0006] Optionally, the first positioning support bearing adopts a spherical roller thrust bearing.

[0007] Optionally, the second positioning support bearing adopts a cylindrical roller bearing.

[0008] Optionally, a number of mounting holes corresponding to the series bearings are provided on the concentric positioning bushing, and the temperature sensor and the vibration sensor are arranged in the mounting holes, and the temperature sensor and the vibration sensor are attached to the outer ring of the series bearings.

[0009] The series bearing test device of the present invention has the following advantages: (1) The concentric positioning bushing, the first inner bushing and the second inner bushing can position the series bearings. The driving motor cooperates with the torque sensor to realize speed simulation, and the oil cylinder cooperates with the pressure sensor to realize axial loading function. The high-temperature lubricating oil enters the shafting through the oil inlet to simulate the high-temperature oil bath lubrication environment for the series bearings; under the simulation conditions of the rotating speed (variable speed and variable direction) of the inner ring of the test bearing, axial load (the load waveform can be set as alternating loads such as rectangular wave and square wave), high-temperature lubrication environment, etc., the temperature, vibration, load, torque, etc. of the test bearing are monitored and recorded in real time, which is convenient for analyzing the performance of the test bearing.

[0010] (2) The gland and the sealing ring cooperate to realize the axial locking and sealing of the first positioning support bearing.

[0011] (3) The thrust self-aligning roller bearing plays the role of axial positioning and radial positioning, and can perform self-aligning and self-centering at the same time; the cylindrical roller bearing, while playing the role of radial positioning, does not affect the transmission of the axial load to the test series bearing. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present invention. Detailed Embodiments

[0013] The following further describes the present invention with reference to the drawings. The following description is based on the directions in the attached Figure 1 drawings.

[0014] As Figure 1 shown, a test device for a series bearing 11 includes a test bench 21. A driving motor 1 is installed on the left side of the test bench 21, a fixed support 18 is installed on the right side of the test bench 21, a torque sensor 2 is arranged between the driving motor 1 and the fixed support 18, a concentric positioning bushing 8 is arranged at the left end of the fixed support 18, and an oil cylinder 16 fixing bushing 17 is arranged at the right end of the fixed support 18. The oil cylinder 16 is fixedly connected to the fixed support 18 through the oil cylinder 16 fixing bushing 17.

[0015] At the left end inside the concentric positioning bushing 8, a first inner bushing 6 is provided. At the right end inside the concentric positioning bushing 8, a second inner bushing 9 is provided. A test main shaft 3 is rotatably connected between the first inner bushing 6 and the second inner bushing 9. The test main shaft 3 is fixedly connected to the output end of the drive motor 1 through a torque sensor 2. On the test main shaft 3, a first positioning support bearing 7, a string bearing 11, and a second positioning support bearing 12 are sequentially arranged. The first positioning support bearing 7 matches the first inner bushing 6, and the second positioning support bearing 12 matches the second inner bushing 9. The first positioning support bearing 7 adopts a thrust self-aligning roller bearing, and the second positioning support bearing 12 adopts a cylindrical roller bearing. The thrust self-aligning roller bearing plays the roles of axial positioning and radial positioning, and can simultaneously perform self-aligning. The cylindrical roller bearing, while playing the role of radial positioning, does not affect the transfer of axial load to the test string bearing 11. The two positioning support bearings are installed in the concentric positioning bushing 8 through two inner bushings, which can not only ensure the positioning and installation accuracy of the overall shafting system, but also ensure that the axial force can be evenly distributed to each row of bearings of the string bearing 11, avoiding premature fatigue damage of the bearings.

[0016] On the concentric positioning bushing 8, a number of mounting holes corresponding to the string bearing 11 are opened. A temperature sensor 10 and a vibration sensor (mounted together with the temperature sensor 10, not labeled in the figure) are installed in the mounting holes. The temperature sensor 10 and the vibration sensor are attached to the outer ring of the string bearing 11 to realize the detection of temperature and vibration. At the left end of the concentric positioning bushing 8, a gland 4 is provided. A sealing ring 5 is provided between the gland 4 and the test main shaft 3. The gland 4 and the sealing ring 5 cooperate to realize the axial locking and sealing of the first positioning support bearing 7. At the right end of the concentric positioning bushing 8, an axial loading end cover 13 is provided. A pressure sensor 15 is provided at the piston end of the oil cylinder 16. An axial loading piston 14 is provided outside the pressure sensor 15. The axial loading piston 14 is attached to the axial loading end cover 13. The oil cylinder 16 cooperates with the pressure sensor 15 to apply pressure to the axial loading end cover 13 by using the axial loading piston 14, thereby realizing the axial loading function. An oil inlet 19 is opened on the concentric positioning bushing 8, and an oil return port 20 is opened at the bottom of the fixed support 18. High-temperature lubricating oil enters the inside of the shafting system through the oil inlet 19 to realize the lubrication of the internal positioning support bearings and the simulation of the high-temperature oil bath lubrication environment of the string bearing 11, and then flows out to the external lubrication system through the oil return port 20 to realize the circulation of the lubricating oil.

[0017] Through the electric control and software system, the rotation direction and speed of the drive motor 1 can be controlled. By changing the speed and rotation direction, the rotation condition of the inner ring of the test bearing can be simulated. By driving the axial loading piston 14 with the oil cylinder 16 to apply pressure to the axial loading end cover 13, the axial load of the test bearing can be simulated. By adding high-temperature lubricating oil to the inside of the shafting system, the high-temperature environment of the test bearing can be simulated. Under the above working conditions, parameters such as the temperature, vibration, load, and torque of the test bearing are monitored and recorded in real time, which is convenient for analyzing the performance of the test bearing.

[0018] The embodiments described above are only partial embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A string bearing test device, characterized in that: It includes a test bench and an oil cylinder. A driving motor and a fixed support are installed on the test bench. A concentric positioning bushing is provided at one end of the fixed support close to the driving motor, and an oil cylinder fixing bushing is provided at the other end of the fixed support away from the driving motor. The oil cylinder is fixedly connected in the oil cylinder fixing bushing; at both ends inside the concentric positioning bushing, a first inner bushing and a second inner bushing are respectively provided. A test main shaft is rotatably connected between the first inner bushing and the second inner bushing. A first positioning support bearing, a series bearing, and a second positioning support bearing are sequentially arranged on the test main shaft. A temperature sensor and a vibration sensor are installed at the position of the series bearing on the concentric positioning bushing. The first positioning support bearing matches the first inner bushing, and the second positioning support bearing matches the second inner bushing; gland covers and axial loading end covers are respectively provided at both ends of the concentric positioning bushing. An oil inlet is provided on the concentric positioning bushing, and an oil return port is provided at the bottom of the fixed support. A torque sensor is installed between the driving motor and the test main shaft; a pressure sensor is provided at the piston end of the oil cylinder, and a loading piston is provided outside the pressure sensor. The loading piston is in contact with the axial loading end cover.

2. The string bearing test device according to claim 1, characterized in that: A sealing ring is provided between the gland cover and the test main shaft.

3. The string bearing test device according to claim 1, characterized in that: The first positioning support bearing adopts a spherical roller thrust bearing.

4. The string bearing test device according to claim 1, characterized in that: The second positioning support bearing adopts a cylindrical roller bearing.

5. The series bearing test device according to claim 1, wherein: A number of installation holes corresponding to the series bearing are provided on the concentric positioning bushing. The temperature sensor and the vibration sensor are arranged in the installation holes, and the temperature sensor and the vibration sensor are in contact with the outer ring of the series bearing.

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