CN114910267A

CN114910267A - Four-pivot bearing test device under down-hole random impact load

Info

Publication number: CN114910267A
Application number: CN202210629834.3A
Authority: CN
Inventors: 苟如意; 陈菁菁; 罗训; 康晨晨; 张金发; 龙顺军; 张高权
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2022-06-03
Filing date: 2022-06-03
Publication date: 2022-08-16

Abstract

The invention relates to the field of underground drilling tools, in particular to a testing device for a four-fulcrum bearing under an underground random impact load. The device comprises a servo motor, an elastic coupling, a speed increaser, a test chamber, a transmission shaft, a universal coupling, a loading device, a vibration exciter, a test bench and the like. The loading device is mainly composed of a loading disc, a vibration exciter, an alternating current motor and the like, an inner ring of the loading disc is fixed with the transmission shaft, the alternating current motor provides power for the loading disc to enable the loading disc to rotate, and the vibration exciter applies loads in any direction and magnitude to a loaded ring on the rotating loading disc and finally transmits the loads to the test bearing. The testing device for the four-pivot bearing under the downhole random impact load can realize loading in any direction and in any size, can adjust the temperature, humidity and lubricating working condition environment, and is favorable for comprehensively judging the failure form and the service life of the bearing during downhole drilling.

Description

Four-pivot bearing test device under down-hole random impact load

Technical Field

The invention relates to the field of underground drilling tools, in particular to a testing device for a four-fulcrum bearing under an underground random impact load.

Background

The bearing is an important part for supporting a mechanical part rotating body, and the main function of the bearing is to reduce the friction coefficient in the motion process and ensure the rotation precision. The four-fulcrum bearing is widely applied to underground drilling tools, is a key part of an underground power drilling tool, and the normal operation and the service life of the four-fulcrum bearing determine the performance and the service life of the underground power drilling tool. When the device is applied to severe environments such as high temperature, humidity, high speed, heavy load, impact, poor lubrication and the like during drilling work, the device can greatly influence the service life and the performance of an underground drilling tool, when the four-fulcrum bearing works underground, the four-fulcrum bearing can bear random radial force Fr, axial force Fa and the two forces and simultaneously act, the traditional bearing test device has a single radial loading or axial loading mode, the working condition of the underground bearing random load cannot be really simulated, and in order to ensure the safety during use, a special test device for the four-fulcrum bearing under the underground random impact load is necessary to be designed to evaluate the dynamic service behavior of the bearing during underground drilling and predict the service life of the bearing.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the underground random impact load four-fulcrum bearing test device, which can load the load of the test bearing in any direction and any size, comprehensively simulate the working condition during underground drilling, can predict the failure form and the service life of the bearing, and can improve the safety performance of a drilling tool during underground use.

In order to achieve the purpose, the invention adopts the technical scheme that the four-fulcrum bearing test device for the underground random impact load mainly comprises a main transmission device, a speed increasing device, a test cabin, a loading device, a test bench, a transmission shaft, an elastic coupling, a universal coupling, a vibration exciter and the like.

The main transmission device is mainly a servo motor, and the whole testing device is powered by the servo motor. The servo motor is arranged on a fixed motor support of the test bed, and the output end of the servo motor is connected with the transmission shaft through an elastic coupling. The speed increaser device is arranged on a speed increaser support of the test bed, and the base is installed in a matched mode through bolts and nuts. The test chamber is mainly formed by sealing parts in the chamber by a shell, and mainly comprises two pairs of test bearings, a part of controller and the like. The simulation of the underground working condition is mainly realized by adjusting a speed increaser device, a temperature controller, a humidity controller, a lubricating oil controller and a loading device in a test cabin. The temperature and humidity controller and the lubricating oil controller are arranged at the outer end part of the test bearing to realize the control of the temperature, humidity and lubricating state of the test bearing.

The loading device is arranged at the tail end of the transmission shaft and is connected with the transmission shaft through a universal coupling, and the loading device mainly comprises a loading disc, a vibration exciter, an alternating current motor and the like. The inner ring of the loading disc is fixed with the shaft, the alternating current motor provides power for the loading disc to rotate, and the vibration exciter applies load in any direction and magnitude to the loaded ring on the rotating loading disc and finally transmits the load to the test bearing.

The invention has the following beneficial effects: 1. the invention can realize loading in any direction and size, can adjust the temperature, humidity and lubricating working condition environment, and is beneficial to comprehensively judging the failure form and the service life of the bearing during underground drilling; 2. the two pairs of test bearings are arranged, so that the test bearings are protected from being damaged by overlarge impact force; 3. the invention can test any bearing which bears radial and axial loads and simultaneously bears the radial and axial loads, and has wide application range.

Drawings

FIG. 1 is a schematic structural view of a test apparatus according to the present invention;

FIG. 2 is a schematic view in partial cross-section of the interior of a test chamber of the present invention;

FIG. 3 is a schematic left side view of the loading device of the present invention;

FIG. 4 is a schematic view of a test bearing of the apparatus of the present invention;

in the drawing, 1, a servo motor, 2, an elastic coupling, 3, a speed increaser, 4, the elastic coupling, 5, a test chamber, 6, a transmission shaft, 7, a universal coupling, 8, a loading device, 9, a vibration exciter, 10, a servo motor support, 11, a speed increaser support, 12, a test chamber support, 13, a test bench, 14, an alternating current motor support, 15, a vibration exciter support, 16, a bolt, 17, a shaft sleeve, 18, a temperature sensor, 19, a humidity sensor, 20, a test bearing, 21, a test bearing, 22, a bearing support, 23, a test bearing, 24, a test bearing, 25, a lubricating oil controller, 26, a retaining ring, 27, an alternating current motor, 28, a loading disc and 29 are arranged.

Detailed Description

As shown in figure 1, the invention relates to a four-fulcrum bearing testing device under a downhole random impact load. The test chamber comprises a servo motor 1, an elastic coupling 2, a speed increaser 3, an elastic coupling 4, a test chamber 5, a transmission shaft 6, a universal coupling 7, a loading device 8, a vibration exciter 9, a servo motor support 10, a speed increaser support 11, a test chamber support 12, a test bench 13, an alternating current motor support 14 and a vibration exciter support 15, wherein the servo motor 1 drives the transmission shaft 6 to rotate, the speed increaser 3 can be adjusted to control the speed according to the speed during drilling, and the loading device 8 controls the direction and the size of a load.

Fig. 2 is a partial cross-sectional view in the test chamber, as shown in the figure, the test chamber 5 is composed of

test bearings

20 and 24, test-accompanying

bearings

21 and 23, a temperature controller 18, a humidity controller 19, a lubricating oil controller 25, a bearing support 22, a baffle ring 26 and a bolt 16, the underground temperature, humidity and lubricating environment is directly controlled by adjusting the temperature controller 18, the humidity controller 19 and the lubricating oil controller 25, the test-accompanying

bearings

21 and 23 are respectively installed at the left end and the right end of the test chamber 5 in pairs, so that the

test bearings

20 and 24 can be prevented from being damaged by excessive impact force in advance, and the

test bearings

20 and 24 are installed at the middle part of the test chamber 5 in pairs.

Fig. 3 is a schematic left side view of the loading device, and as shown in the figure, the loading device is composed of an alternating current motor 27, a loading disc 28, a loading ring 29 and an exciter 9. The loading disc 28 is disc-shaped and is connected with the transmission shaft 6 through the universal coupling 7, the alternating-current motor 27 drives the loading disc to rotate on the transmission shaft 6, three loading rings 29 with the same shape and size are sequentially arranged on the loading disc 28 clockwise at 0 degree, 90 degree and 180 degree, and when the alternating-current motor 27 drives the loading disc 28 to rotate, the vibration exciter 9 can apply loads with random sizes to any loading ring 29.

Fig. 4 is a schematic diagram of a test bearing of the test device of the present invention, which may be subjected to unidirectional radial force, axial force, and both radial and axial forces.

As shown in fig. 1, 2, 3 and 4, when the downhole drilling tool is in high-speed heavy-load operation, the transmission shaft 6 and the speed increaser 3 can supply corresponding rotating speeds by adjusting, and the loading disc 28 in the loading device 8 applies corresponding loads to the loaded ring 29 by the vibration exciter 9 when rotating, so that the

test bearings

20 and 24 can be simultaneously subjected to radial and axial loads.

Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention.

Claims

1. The utility model provides a four fulcrum bearing test device under random impact load in pit, a serial communication port, it is by servo motor (1), elastic coupling (2), speed increaser (3), elastic coupling (4), test chamber (5), transmission shaft (6), universal joint (7), loading device (8), vibration exciter (9), servo motor support (10), speed increaser support (11), test chamber support (12), test bench (13), alternating current motor support (14), vibration exciter support (15) are constituteed, servo motor (1) drive transmission shaft (6) rotate, speed can be controlled the size of speed through adjusting speed increaser (3) according to the speed size when drilling, loading device (8) come the direction and the size of control load.

2. The four-fulcrum bearing test device under the downhole random impact load according to claim 1, it is characterized in that the test chamber (5) is composed of test bearings (20), (24), test-accompanying bearings (21), (23), a temperature controller (18), a humidity controller (19), a lubricating oil controller (25), a bearing support (22), a baffle ring (26) and a bolt (16), the underground temperature, humidity and lubricating environment are directly controlled by adjusting the temperature controller (18), the humidity controller (19) and the lubricating oil controller (25), the test-accompanying bearings (21) and (23) are respectively installed at the left end part and the right end part of the test chamber (5) in pairs, the test bearings (20) and (24) can be prevented from being damaged in advance due to excessive impact force, and the test bearings (20) and (24) are installed in pairs in the middle of the test cabin (5).

3. The device for testing the four-fulcrum bearing under the downhole random impact load according to claim 1, wherein the loading device comprises an alternating current motor (27), a loading disc (28), loading rings (29) and an exciter (9), the loading disc (28) is in a disc shape and is connected with the transmission shaft (6) through a universal coupling (7), the alternating current motor (27) drives the loading disc to rotate on the transmission shaft (6), the loading disc (28) is sequentially provided with three loading rings (29) with the same shape and size in a clockwise direction of 0 degrees, 90 degrees and 180 degrees, and the exciter (9) can apply a load with random size to any loading ring (29) when the alternating current motor (27) drives the loading disc (28) to rotate.

4. The device for testing the four-fulcrum bearing under the random impact load in the well according to claim 1, wherein when the downhole drilling tool is in high-speed and heavy-load operation, the transmission shaft (6) and the speed increaser (3) can be adjusted to corresponding rotating speeds, and when a loading disc (28) in the loading device (8) rotates, corresponding loads are applied to the loading ring (29) through the vibration exciter (9) so that the test bearings (20) and (24) can be subjected to radial and axial loads at the same time, and when the drilling tool is in service in deep wells, high-temperature and damp conditions, poor lubrication and the like exist, and the simulation control of the working environment can be realized by adjusting and controlling the temperature controller (18), the humidity controller (19) and the lubricating oil controller (25).