A slewing bearing loading test apparatus

Abstract

The application discloses a rotary bearing loading test equipment, which comprises two annular loading frames, a first loading device arranged between the two annular loading frames, a second loading device, a third loading device, a fourth loading device, a driving system and a temperature simulation device mounted on each annular loading frame, two bearings respectively installed in the annular loading frames, the driving system for driving the inner ring of the bearing to rotate relative to the outer ring, and the temperature simulation device for heating the bearing, and further comprises a control system connected with each device, which is used for controlling the operation of each device and measuring the data parameters of the bearing. The same working conditions or different working conditions of two sets of bearings of the same specification can be simultaneously studied, evaluation and analysis can be carried out during the test process, early identification and early diagnosis of the bearing to be tested are realized, and the test period and cost are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bearing detection, in particular to a rotary bearing loading test equipment. BACKGROUND

[0002] The main bearing of a full-face tunnel boring machine is a key component of the cutterhead driving system, and bears the main load during the operation of the tunnel boring machine. The working conditions are very harsh, and the performance of the main bearing has a very important influence on tunnel construction. If the main bearing fails during tunneling, it will be extremely difficult to repair or replace it on site, and even impossible, which will bring huge safety risks and unpredictable economic losses.

[0003] Before the bearing is applied to engineering, industrial tests need to be carried out on a test platform to ensure that its performance meets the requirements of installation and engineering application, and to verify its reliability. At present, there are relatively few test devices for the main bearing of a full-face tunnel boring machine, and they are still in the exploratory stage. It is not possible to independently load two sets of the same specification main drive bearings with the same load, it is not easy to quickly judge the performance of the test bearing by comparing and analyzing the monitored state quantities during the test process, and it is not possible to simulate the performance of the main drive bearing in a high surrounding pressure and long-distance tunneling environment with strong temperature rise. It is difficult to verify the reliability of the performance of the main bearing of the tunnel boring machine in the future deep and long tunnel construction environment.

[0004] Therefore, how to provide a rotary bearing loading test equipment capable of simultaneously carrying out comparative tests of two sets of bearings is a technical problem that needs to be solved by those skilled in the art at present. SUMMARY

[0005] The purpose of the present application is to provide a rotary bearing loading test equipment, which can simultaneously carry out comparative tests of two sets of bearings by setting two annular loading frames and a plurality of loading devices, and simulate the actual working conditions of tunneling.

[0006] To solve the above technical problems, the application provides a rotary bearing loading test equipment, which comprises two annular loading frames arranged coaxially and horizontally, a first loading device arranged between the two annular loading frames, a second loading device, a third loading device, a fourth loading device, a driving system and a temperature simulation device mounted on each annular loading frame, two bearings respectively mounted in the annular loading frames, the first loading device used for applying axial load to the inner side end surface of the bearing outer ring, the second loading device used for applying axial load to the outer side end surface of the bearing outer ring, the third loading device used for applying radial load to the outer peripheral surface of the bearing outer ring, the fourth loading device used for applying overturning moment to the lower side of the bearing, the driving system used for driving the bearing inner ring to rotate relative to the outer ring, and the temperature simulation device used for heating the bearing, and further comprising a control system connected with each device, which is used for controlling the operation of each device and measuring the data parameters of the bearing.

[0007] Preferably, the first loading device comprises a plurality of axially extending first oil cylinders, both ends of the first oil cylinders are respectively hinged to the inner side end surfaces of the two annular loading frames, and the plurality of first oil cylinders are uniformly arranged in sequence along the circumference.

[0008] Preferably, the second loading device comprises a plurality of axially extending second oil cylinders, one end of the second oil cylinders is connected with the annular loading frame, the other end of the second oil cylinders abuts against the outer side end surface of the bearing outer ring, and the plurality of second oil cylinders are uniformly arranged in sequence along the circumference.

[0009] Preferably, the third loading device comprises a plurality of radially extending third oil cylinders, one end of the third oil cylinders is hinged to the annular loading frame, the other end of the third oil cylinders abuts against the outer peripheral surface of the bearing outer ring, and the plurality of third oil cylinders are uniformly arranged in sequence along the circumference.

[0010] Preferably, the third loading device comprises a plurality of radially extending third oil cylinders, one end of the third oil cylinders is hinged to the annular loading frame, the other end of the third oil cylinders abuts against the outer peripheral surface of the bearing outer ring, and the plurality of third oil cylinders are uniformly arranged in sequence along the circumference.

[0011] Preferably, the fourth loading device comprises a plurality of vertical fourth oil cylinders, the lower end of the fourth oil cylinders is fixed, the upper end of the fourth oil cylinders is hinged to the lower end surface of the annular loading frame, and the plurality of fourth oil cylinders are respectively arranged at the four corners of the lower end surface of the annular loading frame.

[0012] Preferably, a downwardly open groove is arranged in the middle of the lower end surface of the annular loading frame, a support seat is mounted in the groove, and an elastic pad is arranged between the support seat and the groove.

[0013] Preferably, the drive system includes a variable frequency motor and a reduction mechanism connected to each other. The conveying shaft of the reduction mechanism meshes with the internal teeth of the bearing inner ring through a gear. The variable frequency motor is connected to a torque and speed measuring instrument. Multiple drive systems are arranged evenly along the circumference on the outer end face of the annular loading frame.

[0014] Preferably, the temperature simulation device includes a heating device installed in the heating groove on the inner circumferential surface of the annular loading frame.

[0015] Preferably, a flange is provided between the two annular loading frames, and the two ends of the flange are respectively connected to the inner rings of two bearings.

[0016] This invention provides a slewing bearing loading test device, comprising two annular loading frames arranged coaxially with horizontal axes, a first loading device disposed between the two annular loading frames, and a second loading device, a third loading device, a fourth loading device, a drive system, and a temperature simulation device mounted on each annular loading frame. Two bearings are respectively installed within the annular loading frames. The first loading device is used to apply an axial load to the inner end face of the bearing outer ring, the second loading device is used to apply an axial load to the outer end face of the bearing outer ring, the third loading device is used to apply a radial load to the outer circumferential surface of the bearing outer ring, and the fourth loading device is used to apply an overturning moment to the underside of the bearing. The drive system is used to drive the bearing inner ring to rotate relative to the outer ring, and the temperature simulation device is used to heat the bearing. The device also includes a control system connecting the various devices for controlling the operation of each device and measuring the bearing's data parameters.

[0017] During operation, two bearings, the bearing under test and the benchmark bearing, are installed in two annular loading frames. Loads in different directions are applied by multiple loading devices, the bearings are heated by a temperature simulation device, and parameter data are acquired through the control system. This realistically simulates the comprehensive load, high confining pressure, and strong temperature rise environment that a tunnel boring machine bears when excavating in adverse geological conditions, deep burial, and long tunnels. The test results can accurately reflect the performance of the bearings in actual use. It can simultaneously conduct comparative studies of two sets of bearings of the same specification under the same or different working conditions. Evaluation and analysis can be carried out during the test, enabling early identification and diagnosis of faults in the bearing under test, saving test cycle and cost. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of a specific embodiment of the slewing bearing loading test equipment provided by the present invention;

[0019] Figure 2 This is a side cross-sectional view of a specific embodiment of the slewing bearing loading test equipment provided by the present invention.

[0020] Among them, the first oil cylinder 1, the second oil cylinder 2, the third oil cylinder 3, the fourth oil cylinder 4, the ring loading frame 5, the support seat 6, the elastic pad 7, the variable frequency motor 8, the reduction mechanism 9, the torque and speed measuring instrument 10, the heating device 11, the flange 12, the bearing to be tested 13, and the benchmark bearing 14. Detailed Implementation

[0021] The core of this invention is to provide a slewing bearing loading test device, which, by setting up two annular loading frames and multiple supporting loading devices, can simultaneously conduct comparative studies of two sets of bearings and simulate the actual working conditions of tunnel excavation.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to Figure 1 and Figure 2 , Figure 1 This is a front view schematic diagram of a specific embodiment of the slewing bearing loading test equipment provided by the present invention; Figure 2 This is a side cross-sectional view of a specific embodiment of the slewing bearing loading test equipment provided by the present invention.

[0024] This invention provides a slewing bearing loading test device, comprising two opposing annular loading frames 5. The axes of the two annular loading frames 5 are horizontal and coaxial, meaning the plane containing the two annular loading frames 5 is vertical. Specifically, the upper part of the outer edge of each annular loading frame 5 is semi-circular, and the lower part of the outer edge is rectangular. A circular hole is provided inside each annular loading frame 5, into which the bearing is placed during operation. The two opposite end faces of the two annular loading frames 5 are the inner sides, and the two opposing end faces are the outer sides. Similarly, after two bearings are placed in the annular loading frames 5, the two opposite end faces of the two bearings are the inner sides, and the two opposing end faces are the outer sides.

[0025] Furthermore, a first loading device is provided between the two annular loading frames 5. Each annular loading frame 5 is equipped with a second loading device, a third loading device, a fourth loading device, a drive system, and a temperature simulation device. Two bearings are respectively installed in the annular loading frames 5. The first loading device is used to apply an axial load to the inner end face of the bearing outer ring, the second loading device is used to apply an axial load to the outer end face of the bearing outer ring, the third loading device is used to apply a radial load to the outer circumferential surface of the bearing outer ring, and the fourth loading device is used to apply an overturning moment to the underside of the bearing. The drive system is used to drive the bearing inner ring to rotate relative to the outer ring, and the temperature simulation device is used to heat the bearing. The system also includes a control system that connects the various devices to control the operation of each device and measure the bearing's data parameters.

[0026] During operation, the two bearings, namely the bearing under test 13 and the benchmark bearing 14, are installed in two annular loading frames 5. Loads in different directions are applied by multiple loading devices, the bearings are heated by a temperature simulation device, and parameter data are acquired through the control system. This realistically simulates the comprehensive load, high confining pressure, and strong temperature rise environment that the bearings of the tunnel boring machine bear in excavating poor geological conditions, deep burial, and long tunnels. The test results can accurately reflect the performance of the bearings in actual use. It can simultaneously conduct comparative studies of two sets of bearings of the same specification under the same or different working conditions. Evaluation and analysis can be carried out during the test, enabling early identification and diagnosis of faults in the bearing under test, saving test cycle and cost.

[0027] In the slewing bearing loading test equipment provided in the specific embodiments of the present invention, each loading device can be hydraulically driven, or pneumatically driven, or driven by a motor in conjunction with a corresponding transmission mechanism, all of which are within the protection scope of the present invention. When hydraulically driven, the first loading device includes multiple axially extending first cylinders 1, and multiple hinge seats are correspondingly arranged on the inner end faces of the two annular loading frames 5, so that the two ends of each first cylinder 1 are respectively hinged to the inner end faces of the two annular loading frames 5. At the same time, by setting the position of each hinge seat, the multiple first cylinders 1 are arranged evenly in sequence along the circumference. Meanwhile, an annular baffle is provided on the inner end of the annular loading frame 5, and the annular baffle abuts against the inner end of the outer ring of the bearing. During the test, the first cylinder 1 extends to generate axial thrust, which is transmitted to the bearing under test 13 and the benchmark bearing 14 through the annular baffle, applying an outward axial thrust to the outer rings of the two bearings.

[0028] Furthermore, the second loading device includes multiple axially extending second cylinders 2, which are disposed on the outside of the bearing. One end of the second cylinder 2 is connected to the annular loading frame 5, and the other end of the second cylinder 2 abuts against the outer end face of the bearing outer ring. The multiple second cylinders 2 are arranged evenly in sequence along the circumference. During the test, the second cylinder 2 extends to generate axial force, which acts directly on the outer end face of the bearing outer ring, thereby applying an inward axial thrust to the bearing outer ring.

[0029] The third loading device includes multiple radially extending third cylinders 3. One end of each third cylinder 3 is hinged to an annular loading frame 5, and the other end of each third cylinder 3 abuts against the outer circumferential surface of the bearing outer ring. Multiple hinge seats are correspondingly arranged on the inner circumferential surfaces of the two annular loading frames 5, so that one end of each third cylinder 3 is hinged to the two annular loading frames 5. Simultaneously, by setting the positions of each hinge seat, the multiple third cylinders 3 are arranged evenly and sequentially along the circumference. During the test, the extended third cylinders 3 generate radial force, which acts directly on the outer circumferential surface of the bearing outer ring, thereby applying radial load to the bearing and simulating the high confining pressure of a deeply buried tunnel.

[0030] Specifically, according to the needs of the simulation, there are two rows of third oil cylinders 3 arranged side by side inside and outside, that is, multiple rows of third oil cylinders 3 can be set in the axial direction to adapt to bearings of different thicknesses. In order to ensure the stable connection of the third oil cylinders 3, an installation groove is provided on the inner circumference of the annular loading frame 5, and the third oil cylinders 3 are set in the installation groove.

[0031] The fourth loading device includes multiple vertical fourth hydraulic cylinders 4. The lower ends of the fourth hydraulic cylinders 4 are fixed to the ground, and the upper ends of the fourth hydraulic cylinders 4 are hinged to the lower end face of the annular loading frame 5. Circumvention grooves can be provided at the four corners of the lower end face of the annular loading frame 5, and hinge seats are provided at the top of the circulation grooves. Multiple fourth hydraulic cylinders 4 are respectively located at the four corners of the lower end face of the annular loading frame 5 and connected to the hinge seats. During the test, by adjusting the extension and retraction of the fourth hydraulic cylinders 4, the bearing under test 13 and the benchmark bearing 14 are lifted, thereby applying the overturning torque to the bearings. The number and arrangement of each hydraulic cylinder can also be adjusted according to the situation, all of which are within the protection scope of this invention.

[0032] Preferably, a downward-opening groove is provided in the middle of the lower end face of the annular loading frame 5, and a support seat 6 is installed in the groove. An elastic pad 7 is provided between the support seat 6 and the groove, which is wedge-shaped and fits with the support seat 6 to provide a limiting support for the annular loading frame 5. The lower end of the support seat 6 is fixed to the bottom surface.

[0033] In the slewing bearing loading test equipment provided in this specific embodiment of the invention, the drive system includes a variable frequency motor 8 and a reduction mechanism 9 connected to each other. The variable frequency motor 8 is fixed in position and connected to the reduction mechanism 9. The conveying shaft of the reduction mechanism 9 meshes with the internal teeth of the bearing inner ring through gears. Simultaneously, the variable frequency motor 8 is connected to a torque and speed measuring instrument 10 for real-time monitoring of the torque and speed of the variable frequency motor 8. Multiple drive systems are arranged evenly along the circumferential direction on the outer end face of the annular loading frame 5. These multiple drive systems can be connected via a drive box, which is connected to the annular loading frame 5.

[0034] Furthermore, the temperature simulation device includes a heating device 11. A heating groove is set on the inner circumferential surface of the annular loading frame 5, and the heating device 11 is installed in the heating groove. The heating groove can be the same groove as the mounting groove to simplify the structure, or they can be set separately to separate the oil cylinder and the heating device to ensure system safety. Specifically, the heating device 11 can be a heating resistance wire or a heating furnace, etc. By adjusting the heating device 11, the temperature environment of the bearing in a deep and long tunnel environment is simulated to study the impact of changes in bearing temperature conditions on bearing performance.

[0035] The control system controls the torque, speed and steering of the drive system, and simultaneously controls the load force of the first loading device, the second loading device, the third loading device and the fourth loading device, as well as the temperature of the temperature simulation device. This enables comprehensive environmental simulation of the bearing under test 13 and the benchmark bearing 14 under the same or different working conditions. Experimental data is directly measured and recorded in real time by various sensors.

[0036] Based on the slewing bearing loading test equipment provided in the above specific embodiments, a flange 12 is set between the two annular loading frames 5, and the two ends of the flange 12 are respectively connected to the inner rings of the two bearings to realize synchronous rotation and eliminate frictional rotating pairs.

[0037] The slewing bearing loading test equipment provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A slewing bearing loading test device, characterized in that, The system includes two annular loading frames (5) arranged coaxially with horizontal axes. A first loading device is provided between the two annular loading frames (5). Each annular loading frame (5) is equipped with a second loading device, a third loading device, a fourth loading device, a drive system, and a temperature simulation device. Two bearings are respectively installed in the annular loading frames (5). The first loading device is used to apply an axial load to the inner end face of the outer ring of the bearing. The second loading device is used to apply an axial load to the outer end face of the outer ring of the bearing. The third loading device is used to apply a radial load to the outer circumferential surface of the outer ring of the bearing. The fourth loading device is used to apply an overturning moment to the underside of the bearing. The drive system is used to drive the inner ring of the bearing to rotate relative to the outer ring. The temperature simulation device is used to heat the bearing. The system also includes a control system that connects the various devices and is used to control the operation of each device and measure the data parameters of the bearing. During the operation, the two bearings are the bearing to be tested (13) and the benchmark bearing (14), respectively, and are installed in the two ring loading frames (5), which can simultaneously carry out comparative studies of two sets of bearings of the same specification under the same or different working conditions. The first loading device includes multiple axially extending first cylinders (1), with the two ends of the first cylinders (1) respectively hinged to the inner end faces of the two annular loading frames (5). The multiple first cylinders (1) are arranged evenly in sequence along the circumference. An annular baffle is provided on the inner end of the annular loading frame (5). The annular baffle abuts against the inner end of the outer ring of the bearing. During the test, the first cylinders (1) extend to generate axial thrust, which is transmitted to the bearing under test (13) and the benchmark bearing (14) through the annular baffle, applying an outward axial thrust to the outer rings of the two bearings. The second loading device includes a plurality of axially extending second cylinders (2), one end of the second cylinder (2) is connected to the annular loading frame (5), and the other end of the second cylinder (2) abuts against the outer end face of the outer ring of the bearing. The plurality of second cylinders (2) are arranged evenly in sequence along the circumference. The third loading device includes multiple radially extending third cylinders (3), one end of the third cylinder (3) is hinged to the annular loading frame (5), and the other end of the third cylinder (3) abuts against the outer circumferential surface of the bearing outer ring. The multiple third cylinders (3) are arranged evenly in sequence along the circumferential direction. The third oil cylinder (3) is arranged in two rows side by side, and the inner circumference of the annular loading frame (5) is provided with an installation groove, and the third oil cylinder (3) is disposed in the installation groove; The fourth loading device includes multiple vertical fourth cylinders (4), the lower end of the fourth cylinder (4) is fixed, the upper end of the fourth cylinder (4) is hinged to the lower end face of the annular loading frame (5), and the multiple fourth cylinders (4) are respectively arranged at the four corners of the lower end face of the annular loading frame (5). The lower end face of the ring loading frame (5) is provided with a downward-facing groove, and a support seat (6) is installed in the groove. An elastic pad (7) is provided between the support seat (6) and the groove. The elastic pad (7) and the support seat (6) are in wedge-shaped clearance fit. The drive system includes a variable frequency motor (8) and a reduction mechanism (9) connected to each other. The conveying shaft of the reduction mechanism (9) meshes with the inner teeth of the bearing inner ring through a gear. The variable frequency motor (8) is connected to a torque and speed measuring instrument (10). Multiple drive systems are arranged evenly along the circumferential direction on the outer end face of the annular loading frame (5).

2. The slewing bearing loading test equipment according to claim 1, characterized in that, The temperature simulation device includes a heating device (11) installed in the heating groove on the inner circumferential surface of the annular loading frame (5).

3. The slewing bearing loading test equipment according to any one of claims 1 to 2, characterized in that, A flange (12) is provided between the two annular loading frames (5), and the two ends of the flange (12) are respectively connected to the inner rings of two bearings.

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