A bevel gear multi-source signal fault test bench capable of implanting installation errors

Abstract

The present invention discloses a bevel gear multi-source signal fault test bench capable of implanting installation errors, comprising a vibration isolation base plate and a variable speed drive motor module, an input end torque speed sensor module, an input end encoder, a bevel gear box module, an output end encoder, an output end torque sensor module and an eddy current brake module arranged on the vibration isolation base plate; the variable speed drive motor module is connected to the input end torque speed sensor module through a first coupling, the input end torque speed sensor module is connected to the bevel gear box module through a second coupling, the bevel gear box module is connected to the output end torque sensor module through a third coupling, and the output end torque sensor module is connected to the eddy current brake module through a fourth coupling. The present invention can realize the bevel gear transmission signal collection of multiple fault types on a test bench, and can adjust the relative position of each component according to demand, and quickly replace the test piece.

Description

Technical Field

[0001] The invention belongs to the field of fault testing, relates to bevel gear fault testing, and specifically relates to a bevel gear multi-source signal fault testing platform capable of implanting installation errors. Background Art

[0002] Gear transmission is one of the common transmission methods in mechanical engineering. Bevel gears are widely used in aerospace, automobile manufacturing, engineering machinery and other industries due to their high efficiency, excellent overlap, strong load-bearing capacity and low vibration and noise. However, the tooth surface structure of bevel gears is complex and difficult to manufacture, and its transmission performance and vibration and noise control are still difficult problems in the industry. In order to ensure the reliability of the bevel gear structure, its operating conditions must be accurately tested. Such highly complex tests need to be completed on a special gear test bench. This test bench can be operated under a variety of torque and load conditions and different lubrication conditions, and can test gears, bearings or couplings with various specifications and types of faults. By implanting errors on the test bench, test signals such as vibration acceleration, angular velocity, temperature, metal abrasive particles, and input and output speeds and torques are systematically collected, thereby providing a scientific basis for the optimal design of the gear transmission system.

[0003] The test benches for high-speed gearboxes with bevel gears are mostly general testing machines, and the measurement targets are mostly general vibration characteristics, lacking the collection of multi-signals such as relative transmission error, transmission efficiency, and temperature. Therefore, a multi-signal collection bevel gear test bench that can be applied to bevel gear test pieces with different fault types, is easy to replace, and has a variety of test conditions is needed. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, a bevel gear multi-source signal fault test bench capable of implanting installation errors is provided, which can realize the collection of bevel gear transmission signals of various fault types on one test bench, and can adjust the relative positions of various components as needed, and quickly replace the test pieces.

[0005] Technical solution: To achieve the above-mentioned purpose, the present invention provides a bevel gear multi-source signal fault test bench capable of implanting installation errors, comprising a vibration isolation base plate and a variable speed drive motor module, an input end torque speed sensor module, an input end encoder, a bevel gear box module, an output end encoder, an output end torque sensor module and an eddy current brake module arranged on the vibration isolation base plate; the variable speed drive motor module is connected to the input end torque speed sensor module through a first coupling, the input end torque speed sensor module is connected to the bevel gear box module through a second coupling, the bevel gear box module is connected to the output end torque sensor module through a third coupling, the output end torque sensor module is connected to the eddy current brake module through a fourth coupling, and the input end encoder and the output end encoder are respectively arranged at the input end and the output end of the bevel gear box module;

[0006] The input end torque speed sensor module and the output end torque sensor module are used to monitor the transmission efficiency of the system; the input end encoder and the output end encoder are used to measure the relative transmission error of the system.

[0007] Further, the bevel gear box module includes a box body and internal components, the box body includes a box body top cover, an upper box body, a lower box body, a box body bottom plate and a box body base, the box body top cover is connected to the top of the upper box body by bolts, the upper box body and the lower box body are fixedly connected by a first flange, a second flange and a third flange, the flanges are all fixed to the upper box body and the lower box body by bolts, a bearing temperature sensor mounting hole is provided on the surface of the upper box body, a copper oil mirror, an oil drain valve, an oil temperature sensor mounting hole and a metal abrasive particle sensor mounting hole are provided on the surface of the lower box body, a bearing temperature sensor is installed on the bearing temperature sensor mounting hole, an oil temperature sensor is installed on the oil temperature sensor mounting hole, and a metal abrasive particle sensor is installed on the metal abrasive particle sensor mounting hole;

[0008] The internal components include an input end arc bevel gear, an output end arc bevel gear, a first bearing, a second bearing, a third bearing, a fourth bearing, an input end transmission shaft, and an output end transmission shaft. The input end arc bevel gear, the first bearing, and the second bearing are matched on the input end transmission shaft, and the output end arc bevel gear, the third bearing, and the fourth bearing are matched on the output end transmission shaft. The input end arc bevel gear and the output end arc bevel gear are meshed with each other.

[0009] Furthermore, a micro vibration acceleration sensor and a gear temperature sensor are arranged on the output end spiral bevel gear, a conductive slip ring is arranged on the output end transmission shaft, the conductive slip ring includes a conductive slip ring rotor and a conductive slip ring stator, the output end transmission shaft is fixedly connected to the conductive slip ring rotor, the conductive slip ring stator remains in a fixed state, the output end transmission shaft is a hollow shaft, and the transmission lines of the micro vibration acceleration sensor and the gear temperature sensor pass through the axial radial hole of the output end transmission shaft, and are connected to the conductive slip ring rotor through the hollow output shaft inner hole of the output end transmission shaft.

[0010] Furthermore, the test bench realizes dynamic eccentricity error implantation and static eccentricity error implantation by installing an inner ring eccentric sleeve and an outer ring eccentric sleeve on the input end transmission shaft, as follows:

[0011] Dynamic eccentricity error implantation: Replace the bearing spacer washer between the inner ring of the second bearing and the input end transmission shaft with an inner ring eccentric sleeve with uneven wall thickness, so that the bearing rotation center is offset from the geometric center of the shaft, and the eccentric sleeve rotates with the shaft to achieve dynamic eccentricity error implantation;

[0012] Static eccentricity error implantation: an outer ring eccentric sleeve with uneven wall thickness is added between the outer ring of the second bearing and the bearing seat, so that the bearing rotation center is offset from the geometric center of the shaft. The outer ring eccentric sleeve, the bearing outer ring and the bearing seat remain stationary and the eccentric position does not change with the rotation of the shaft, thereby realizing the implantation of static eccentricity error.

[0013] As another eccentric error implantation scheme, the eccentric error implantation is achieved by using the eccentric shaft as a replacement shaft for the input-end transmission shaft. Specifically, the eccentric shaft is used as a replacement shaft for the input-end transmission shaft, and the geometric center of the middle section of the eccentric shaft, that is, the installation shaft section of the first bearing and the second bearing, is not colinear with the geometric center of the adjacent shaft section, so that the rotation axis of the input-end transmission shaft 6.1 is offset, causing the rotation center of the input-end arc bevel gear to be offset, and the meshing point changes, thereby realizing the collection of periodic load change vibration signals.

[0014] Furthermore, the vibration isolation base plate is provided with corresponding X-axis grooves and Y-axis grooves, the variable speed drive motor module and the input end torque speed sensor module are matched on the X-axis groove, and the output end torque sensor module and the eddy current brake module are matched on the Y-axis groove.

[0015] Further, the variable speed drive motor module includes a three-phase asynchronous motor body and a motor base, the motor base is matched on the X-axis groove, and a T-shaped protrusion is provided on the lower surface of the motor base to fit with the X-axis groove to achieve forward and backward sliding; the input end torque and speed sensor module includes an input end torque and speed sensor body and an input end torque and speed sensor base, the input end torque and speed sensor base is matched on the X-axis groove, and a T-shaped protrusion is provided on the lower surface of the input end torque and speed sensor base to fit with the X-axis groove to achieve forward and backward sliding; the output end torque sensor module includes an output end torque sensor body and an output end torque sensor base, the output end torque sensor base is matched on the Y-axis groove, and a T-shaped protrusion is provided on the lower surface of the output end torque sensor base to fit with the Y-axis groove to achieve forward and backward sliding; the eddy current brake module includes a brake body and a brake base, the brake base is matched on the Y-axis groove, and a T-shaped protrusion is provided on the lower surface of the brake base to fit with the Y-axis groove to achieve forward and backward sliding. The brake body is used as a load-applying device to simulate the load conditions under actual working conditions, provide an adjustable load, and test the performance of the power transmission system.

[0016] Furthermore, the vibration isolation bottom plate is provided with mounting positioning holes, and the box base of the bevel gear box module is mounted and fixed on the vibration isolation bottom plate through the mounting positioning holes.

[0017] Furthermore, the motor base, the input end torque sensor base, the output end torque sensor base and the brake base are all fixed to the vibration isolation base plate by T-bolts.

[0018] Furthermore, the test bench includes a speed control cabinet, which includes a start button, a stop button, an emergency stop button, a speed control knob and a touch screen. The speed control cabinet is used to control the variable speed drive motor module and the eddy current brake module, which continuously runs for a long time during the test and controls the applied power and load. At the beginning and end of the test, the overall change of the load regulation is smooth to avoid impact on the tested object, and evaluate the efficiency and performance of the tested gear pair under long-term operation under different working conditions.

[0019] The present invention can simulate the operating conditions of bevel gears, adopt a modular design, realize rapid disassembly and replacement of faulty parts, implant various faults of gears, bearings or couplings, and collect multivariate signals such as vibration acceleration, torque speed, angular velocity, temperature, and metal abrasive accumulation corresponding to different fault types, so as to provide data support for fault diagnosis of gear transmission.

[0020] The power of the test bench of the present invention is transmitted to the first coupling after being regulated by the variable frequency drive speed control module through the variable speed drive motor. The first coupling is connected to the input end torque speed sensor, and then connected to the second coupling and the input end transmission shaft. The power is transmitted to the measured bevel gear pair through the input shaft. The arc bevel gear on the input shaft transmits the power to another arc bevel gear on the output shaft, so as to realize the meshing of the measured bevel gear pair and the steering transmission of the power. The power is transmitted through the output shaft to complete the whole power transmission process. The output shaft is connected to the eddy current brake for loading the load, and passes through the output end encoder, the third coupling, the output end torque sensor, the fourth coupling and the transmission shaft in the middle.

[0021] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0022] 1. Multiple fault implantation

[0023] The test bench of the present invention can simulate different speed and load working conditions, and replace test pieces of different fault types, including cracks, broken teeth, peeling, pitting, wear of gears, composite cracks of inner ring, outer ring, cage, rolling element, inner and outer ring of bearings, static eccentricity error, dynamic eccentricity error of bearings, eccentricity error of shafts and deformation of couplings. Multivariate signals corresponding to working conditions of various fault types are collected to provide data support for fault diagnosis of gear transmission systems.

[0024] 2. Modular design

[0025] The test bench of the present invention is composed of transmission components such as a variable frequency drive speed control module, a test gear box module and a multi-signal acquisition module. The test bench base is designed with a T-shaped slide rail and a mounting positioning hole. When replacing a faulty part, the test bench is allowed to quickly adjust the relative positions of each component according to the test requirements, avoid the disassembly of multiple components, simplify the operation process of gear disassembly and assembly and component position change, improve the replacement rate and the accuracy of component alignment, improve the efficiency of different types of fault tests on gears, bearings or couplings, ensure the high repeatability of the test process, ensure the consistency and reliability of data acquisition, and improve the scope of application and flexibility of the test bench.

[0026] 3. Integrated sensor design

[0027] The present invention realizes efficient acquisition of multi-signals by designing an integrated sensor on the spiral bevel gear and solving the power supply and data transmission with the aid of a conductive slip ring. The sensor is tightly connected to the gear and data acquisition is performed closer to the gear transmission meshing point, which reduces the interference of mechanical vibration on the signal during solid transmission and improves the accuracy of data acquisition. The integrated sensor does not require additional mounting brackets and protective devices, simplifies the system structure, saves space, and reduces maintenance costs. It has obvious advantages in terms of signal acquisition accuracy, anti-interference ability, and ease of maintenance.

[0028] 4. Multi-signal acquisition network

[0029] The present invention designs an integrated sensor network to collect test bench working condition information in multiple dimensions. On the one hand, vibration acceleration sensors are arranged at multiple key positions such as the gear meshing area, bearing support points, input end, and output end of the gear transmission system; on the other hand, the oil temperature, bearing temperature, and metal chip accumulation trend are monitored; in addition, an encoder is used to measure the relative transmission error of the system, a torque speed sensor is used to monitor the system transmission efficiency, and a metal abrasive particle sensor integrated in the gear box is used to quantitatively monitor the wear state of the bevel gear. The working state information of the gear transmission system is collected in multiple dimensions and in all directions, providing signal data support for analyzing the dynamic characteristics and working state of the gear system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a test diagram of the test bench of the present invention;

[0031] Figure 2 It is a three-dimensional structural diagram of the test bench of the present invention;

[0032] Figure 3 It is a three-dimensional structural diagram of the bevel gearbox module of the present invention;

[0033] Figure 4 The three-dimensional structure diagram of the bevel gear box housing, i.e. the internal design of the present invention;

[0034] Figure 5 It is a three-dimensional structural diagram of the transmission shaft and supporting structure of the present invention;

[0035] Figure 6 It is a three-dimensional diagram of the eccentric sleeve and the eccentric shaft of the present invention;

[0036] Figure 7 It is a three-dimensional structural diagram of the vibration isolation base plate of the present invention;

[0037] Figure 8 A three-dimensional structural diagram of a torque and speed sensor module of the present invention;

[0038] Fig. 9 It is a three-dimensional structural diagram of the variable frequency drive speed control module of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0040] like Figure 1 and Figure 2 As shown, the present invention provides a bevel gear multi-source signal fault test bench capable of implanting installation errors, comprising an isolation base plate 12 and a variable speed drive motor module 1, an input end torque speed sensor module 3, an input end encoder 5, a bevel gear box module 6, an output end encoder 7, an output end torque sensor module 9 and an eddy current brake module 11 arranged on the isolation base plate 12; the variable speed drive motor module 1 is connected to the input end torque speed sensor module 3 through a first coupling 2, the input end torque speed sensor module 3 is connected to the bevel gear box module 6 through a second coupling 4, the bevel gear box module 6 is connected to the output end torque sensor module 9 through a third coupling 8, the output end torque sensor module 9 is connected to the eddy current brake module 11 through a fourth coupling 10, and the input end encoder 5 and the output end encoder 7 are respectively arranged at the input end and the output end of the bevel gear box module 6.

[0041] like Figure 3 and Figure 4 As shown, the bevel gear box module 6 includes a box body and internal components. The box body includes a box body top cover 6.3, an upper box body 6.4, a lower box body 6.6, a box body bottom plate 6.7 and a box body base 6.8. The box body top cover 6.3 is connected to the top of the upper box body 6.4 through 8 bolts 6.2. The upper box body 6.4 and the lower box body 6.6 are fixedly connected through a first flange 6.9, a second flange 6.10 and a third flange 6.11. The three flanges are all fixed to the upper box body 6.4 and the lower box body 6.6 through 4 bolts. The surface of the upper box body 6.4 is provided with a bearing temperature sensor mounting hole 6.12. The surface of the lower box body 6.6 is provided with a copper oil mirror 6.13, an oil drain valve 6.14, an oil temperature sensor mounting hole 6.15, and a metal abrasive sensor mounting hole 6.16. The bearing temperature sensor mounting hole 6.12 is provided with a bearing temperature sensor The oil temperature sensor mounting hole 6.15 is provided with an oil temperature sensor, and the metal abrasive particle sensor mounting hole 6.16 is provided with a metal abrasive particle sensor; the output end arc bevel gear 6.18 is provided with a micro vibration acceleration sensor 6.26 and a gear temperature sensor 6.25; the output end transmission shaft 6.5 is provided with a conductive slip ring, the conductive slip ring comprises a conductive slip ring rotor 6.23 and a conductive slip ring stator 6.24; the output end transmission shaft 6.5 is fixedly connected with the conductive slip ring rotor 6.23, the conductive slip ring stator 6.24 remains in a fixed state, the output end transmission shaft 6.5 is a hollow shaft, the transmission lines of the micro vibration acceleration sensor 6.26 and the gear temperature sensor 6.25 pass through the axial radial hole of the output end transmission shaft 6.5, and are connected with the conductive slip ring rotor 6.23 through the hollow output shaft inner hole of the output end transmission shaft 6.5.

[0042] like Figure 5As shown, the internal components of the bevel gear box module 6 include an input end arc bevel gear 6.17, an output end arc bevel gear 6.18, a first bearing 6.19, a second bearing 6.20, a third bearing 6.21, a fourth bearing 6.22, an input end transmission shaft 6.1, and an output end transmission shaft 6.5. The input end arc bevel gear 6.17, the first bearing 6.19, and the second bearing 6.20 are matched on the input end transmission shaft 6.1, the output end arc bevel gear 6.18, the third bearing 6.21, and the fourth bearing 6.22 are matched on the output end transmission shaft 6.5, and the input end arc bevel gear 6.17 and the output end arc bevel gear 6.18 are meshed with each other.

[0043] like Figure 6 As shown, in the present invention, the eccentricity error can be implanted into the test. The eccentricity error has two implantation methods: installing an eccentric sleeve and an eccentric shaft. The inner ring eccentric sleeve 6.27 and the outer ring eccentric sleeve 6.28 are respectively adapted to the inner ring and the outer ring of the second bearing 6.20. The eccentric shaft 6.29 is a replacement shaft for the input end transmission shaft 6.1. The dynamic eccentricity error and the static eccentricity error can be implanted by the inner ring eccentric sleeve 6.27, the outer ring eccentric sleeve 6.28 and the eccentric shaft 6.29. The specific implantation method is as follows:

[0044] Dynamic eccentricity error implantation: The bearing spacer washer between the inner ring of the second bearing 6.20 and the input end transmission shaft 6.1 is replaced with an inner ring eccentric sleeve 6.27 with uneven wall thickness, so that the bearing rotation center is offset from the geometric center of the shaft, and the eccentric sleeve rotates with the shaft to realize the implantation of dynamic eccentricity error.

[0045] Static eccentricity error implantation: an outer ring eccentric sleeve 6.28 with uneven wall thickness is added between the outer ring of the second bearing 6.20 and the bearing seat, so that the bearing rotation center is offset from the geometric center of the shaft. The outer ring eccentric sleeve 6.28, the bearing outer ring and the bearing seat remain stationary and the eccentric position does not change with the rotation of the shaft, thereby realizing the implantation of static eccentricity error.

[0046] The replaceable eccentric shaft is the second solution for eccentric error implantation, which focuses on the eccentric error of the shaft system of the transmission shaft itself, such as Figure 5 and Figure 6 As shown, the eccentric shaft 6.29 is used as a replacement shaft for the input-end transmission shaft 6.1. The geometric center of the middle section of the eccentric shaft 6.29 (the mounting shaft section of the first bearing 6.19 and the second bearing 6.20) is not colinear with the geometric center of the adjacent shaft section, so that the rotation axis of the input-end transmission shaft 6.1 is offset, causing the rotation center of the input-end arc bevel gear 6.17 (driving wheel) to be offset, and the meshing point changes, thereby realizing the collection of periodic load change vibration signals.

[0047] like Figure 7As shown, the vibration isolation base plate 12 is provided with corresponding X-axis grooves 12.1 and Y-axis grooves 12.2, and the vibration isolation base plate 12 is provided with four mounting positioning holes 12.3. The box base 6.8 of the bevel gear box module 6 is mounted and fixed on the vibration isolation base plate 12 through the mounting positioning holes 12.3.

[0048] like Figure 7 to Figure 9 As shown, the test bench includes a speed control cabinet 13, and the variable speed drive motor module 1, the eddy current brake module 11 and the speed control cabinet 13 are combined to form a variable frequency drive speed control module. The variable speed drive motor module 1 includes a three-phase asynchronous motor body 1.1 and a motor base 1.2. The motor base 1.2 is matched on the X-axis groove 12.1, and the lower surface of the motor base 1.2 is provided with a T-shaped protrusion (not shown in the figure) to fit with the X-axis groove 12.1 to achieve forward and backward sliding; the input end torque speed sensor module 3 includes an input end torque speed sensor body 3.2 and an input end torque speed sensor base 3.1. The input end torque speed sensor base 3.1 is matched on the X-axis groove 12.1, and the lower surface of the input end torque speed sensor base 3.1 is provided with a T-shaped protrusion that fits with the X-axis groove 12.1 fits together to achieve forward and backward sliding; the output end torque sensor module 9 includes an output end torque sensor body and an output end torque sensor base, the output end torque sensor base fits on the Y-axis groove 12.2, and the lower surface of the output end torque sensor base is provided with a T-shaped protrusion that fits with the Y-axis groove 12.2 to achieve forward and backward sliding; the eddy current brake module 11 includes a brake body 11.1 and a brake base 11.2, the brake base 11.2 fits on the Y-axis groove 12.2, and the lower surface of the brake base 11.2 is provided with a T-shaped protrusion that fits with the Y-axis groove 12.2 to achieve forward and backward sliding. The brake body 11.1 is used as a load loading device to simulate the load conditions under actual working conditions, provide an adjustable load, and test the performance of the power transmission system.

[0049] The motor base 1.2, the input torque speed sensor base 3.1, the output torque sensor base and the brake base 11.2 are all fixed to the vibration isolation base plate 12 by T-bolts (not shown in the figure). The speed control cabinet 13 includes a start button 13.1, a stop button 13.2, an emergency stop button 13.3, a speed control knob 13.4 and a touch screen 13.5. The speed control cabinet 13 is used to control the variable speed drive motor module 1 and the eddy current brake module 11. During the test, it runs continuously for a long time and controls the applied power and load. At the beginning and end of the test, the overall change of the load regulation is smooth to avoid impact on the tested object, and the efficiency and performance of the tested gear pair under long-term operation under different working conditions are evaluated.

[0050] The test pieces of the bevel gear multi-source signal fault test bench include spiral bevel gears, bearings, and couplings. The specific test method and process are as follows:

[0051] Installation of the test piece:

[0052] Installation of spiral bevel gear and bearing: Loosen the bolts on the first flange 6.9, the second flange 6.10 and the third flange 6.11, remove the upper housing 6.4 and the housing top cover 6.3, remove the input end transmission shaft 6.1, replace the input end spiral bevel gear 6.17, the first bearing 6.19 and the second bearing 6.20 on the input end transmission shaft 6.1 with the specified test piece, and install the eccentric sleeve 6.27, the outer ring eccentric sleeve 6.28 and the eccentric replacement shaft 6.29 on the input end transmission shaft 6.1, install the input end transmission shaft 6.1 on the bevel gear box module 6, and finally install the upper housing 6.4 and the housing top cover 6.3.

[0053] Installation of the coupling: by sliding the motor base 1.2 and the input end torque speed sensor base 3.1 on the X-axis groove 12.1, adjust the relative distance between the three-phase asynchronous motor body 1.1 and the input end torque speed sensor body 3.2 and the input end torque speed sensor body 3.2 and the bevel gear box module 6, and install the coupling to be tested (the first coupling 2 and the second coupling 4), the two ends of the first coupling 2 are respectively connected to the output end of the three-phase asynchronous motor body 1.1 and the input end of the input end torque speed sensor body 3.2, and the two ends of the second coupling 4 are respectively connected to the output end of the input end torque speed sensor body 3.2 and the input end transmission shaft 6.1. Similarly, the installation of the third coupling 8 and the fourth coupling 10 can also be realized, the two ends of the third coupling 8 are respectively connected to the output end transmission shaft 6.5 and the input end of the output end torque sensor module 9, and the fourth coupling 10 is respectively connected to the output end of the output end torque sensor module 9 and the brake body 11.1.

[0054] Test process: The output power of the three-phase asynchronous motor body 1.1 is regulated by the speed control cabinet 13, and the power is transmitted to the input end transmission shaft 6.1 through the first coupling 2 and the second coupling 4. The input end transmission shaft 6.1 drives the input end arc bevel gear 6.17 (the measured bevel gear pair) to rotate, and the input end arc bevel gear 6.17 transmits the power to the output end arc bevel gear 6.18 to achieve the meshing of the measured bevel gear pair and the steering transmission of power. The output end arc bevel gear 6.18 transmits the power, and the output end arc bevel gear 6.18 transmits the power to the brake body 11.1 through the output end encoder 7, the third coupling 8, the output end torque sensor module 9, and the fourth coupling 10 in sequence.

[0055] During this test, the oil temperature sensor of the lower housing 6.6 of the bevel gearbox module measures the temperature of the gear lubricating oil, the metal abrasive sensor monitors the amount of metal abrasives generated by gear wear in the lubricating oil, the bearing temperature sensor of the upper housing 6.4 monitors the temperature of the outer ring of the bearing, and the vibration acceleration sensor 6.26 and the gear temperature sensor 6.25 on the driven wheel collect the vibration acceleration signal and temperature signal of the gear respectively. The input encoder 5 is used to measure the angular velocity of the input transmission shaft, and the output encoder 7 is used to measure the angular velocity of the output transmission shaft. The measurement of angular velocity is used for the transmission efficiency analysis of the test bench. The input torque speed sensor 3.2 is used to monitor and display the actual torque entering the gearbox under test in real time to ensure that the equipment operates according to the planned parameters. The output torque speed sensor monitors and displays the torque leaving the gearbox under test in real time, which is used to analyze the output performance and transmission efficiency of the test bench.

Claims

1. A bevel gear multi-source signal fault test bench capable of implanting installation errors, characterized in that: It includes a vibration isolation base plate and a variable speed drive motor module, an input end torque speed sensor module, an input end encoder, a bevel gear box module, an output end encoder, an output end torque sensor module and an eddy current brake module arranged on the vibration isolation base plate; the variable speed drive motor module is connected to the input end torque speed sensor module through a first coupling, the input end torque speed sensor module is connected to the bevel gear box module through a second coupling, the bevel gear box module is connected to the output end torque sensor module through a third coupling, the output end torque sensor module is connected to the eddy current brake module through a fourth coupling, and the input end encoder and the output end encoder are respectively arranged at the input end and the output end of the bevel gear box module; The input end torque speed sensor module and the output end torque sensor module are used to monitor the transmission efficiency of the system; the input end encoder and the output end encoder are used to measure the relative transmission error of the system; The bevel gear box module includes a box body and internal components, the box body includes a box body top cover, an upper box body, a lower box body, a box body bottom plate and a box body base, the box body top cover is connected to the top of the upper box body by bolts, the upper box body and the lower box body are fixedly connected by a first flange, a second flange and a third flange, a bearing temperature sensor mounting hole is provided on the surface of the upper box body, a copper oil mirror, an oil drain valve, an oil temperature sensor mounting hole and a metal abrasive particle sensor mounting hole are provided on the surface of the lower box body, a bearing temperature sensor is installed on the bearing temperature sensor mounting hole, an oil temperature sensor is installed on the oil temperature sensor mounting hole, and a metal abrasive particle sensor is installed on the metal abrasive particle sensor mounting hole; The internal components include an input end arc bevel gear, an output end arc bevel gear, a first bearing, a second bearing, a third bearing, a fourth bearing, an input end transmission shaft, and an output end transmission shaft. The input end arc bevel gear, the first bearing, and the second bearing are matched on the input end transmission shaft, and the output end arc bevel gear, the third bearing, and the fourth bearing are matched on the output end transmission shaft. The input end arc bevel gear and the output end arc bevel gear are meshed with each other. The dynamic eccentricity error implantation and the static eccentricity error implantation are respectively realized by installing the inner ring eccentric sleeve and the outer ring eccentric sleeve on the input end transmission shaft, as follows: Dynamic eccentricity error implantation: Replace the bearing spacer washer between the inner ring of the second bearing and the input end transmission shaft with an inner ring eccentric sleeve with uneven wall thickness, so that the bearing rotation center is offset from the geometric center of the shaft, and the eccentric sleeve rotates with the shaft to achieve dynamic eccentricity error implantation; Static eccentricity error implantation: An outer ring eccentric sleeve with uneven wall thickness is added between the outer ring of the second bearing and the bearing seat, so that the bearing rotation center is offset from the geometric center of the shaft. The outer ring eccentric sleeve, the bearing outer ring and the bearing seat remain stationary and the eccentric position does not change with the rotation of the shaft, thus realizing the implantation of static eccentricity error. The eccentric error is implanted by using the eccentric shaft as a replacement shaft for the input-end transmission shaft. Specifically, the eccentric shaft is used as a replacement shaft for the input-end transmission shaft. The geometric center of the middle section of the eccentric shaft, that is, the installation shaft section of the first bearing and the second bearing, is not colinear with the geometric center of the adjacent shaft section, so that the rotation axis of the input-end transmission shaft is offset, causing the rotation center of the input-end spiral bevel gear to be offset, and the meshing point changes, thereby realizing the collection of periodic load change vibration signals. The vibration isolation bottom plate is provided with an X-axis groove and a Y-axis groove corresponding to each other, the variable speed drive motor module and the input end torque speed sensor module are matched on the X-axis groove, and the output end torque sensor module and the eddy current brake module are matched on the Y-axis groove; The variable speed drive motor module includes a three-phase asynchronous motor body and a motor base, and the motor base is matched on the X-axis slot; the input end torque and speed sensor module includes an input end torque and speed sensor body and an input end torque and speed sensor base, and the input end torque and speed sensor base is matched on the X-axis slot; the output end torque sensor module includes an output end torque sensor body and an output end torque sensor base, and the output end torque sensor base is matched on the Y-axis slot; the eddy current brake module includes a brake body and a brake base, and the brake base is matched on the Y-axis slot.

2. A bevel gear multi-source signal fault test bench capable of implanting installation errors according to claim 1, characterized in that: A micro vibration acceleration sensor and a gear temperature sensor are arranged on the output end arc bevel gear, a conductive slip ring is arranged on the output end transmission shaft, the conductive slip ring comprises a conductive slip ring rotor and a conductive slip ring stator, the output end transmission shaft is fixedly connected to the conductive slip ring rotor, the conductive slip ring stator remains in a fixed state, the output end transmission shaft is a hollow shaft, the transmission lines of the micro vibration acceleration sensor and the gear temperature sensor pass through the axial radial hole of the output end transmission shaft, and are connected to the conductive slip ring rotor through the hollow output shaft inner hole of the output end transmission shaft.

3. A bevel gear multi-source signal fault test bench capable of implanting installation errors according to claim 1, characterized in that: The vibration isolation bottom plate is provided with mounting positioning holes, and the box base of the bevel gear box module is mounted and fixed on the vibration isolation bottom plate through the mounting positioning holes.

4. A bevel gear multi-source signal fault test bench capable of implanting installation errors according to claim 1, characterized in that: The motor base, the input end torque speed sensor base, the output end torque sensor base and the brake base are all fixed on the vibration isolation base plate by T-bolts.

5. The bevel gear multi-source signal fault test bench capable of implanting installation errors according to claim 1, characterized in that: The test bench includes a speed control cabinet, which includes a start button, a stop button, an emergency stop button, a speed control knob and a touch screen. The speed control cabinet is used to control the variable speed drive motor module and the eddy current brake module.

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