Testing device for testing performance of dual-motor system

Abstract

According to the testing device for testing the performance of the dual-motor system, the two motors are installed on the testing stand at the same time, the differential mechanism and the electromagnetic brake are arranged on the testing stand, output performance testing of the single motor and the two motors and fault-tolerant performance testing between the two motors can be achieved, the testing device can be installed on the impact vibration testing stand, and the testing efficiency is improved. The function performance test of the motor under the environment conditions of random vibration test, impact test and the like is realized.

Description

Technical Field

[0001] The invention belongs to the field of aerospace servo motor test equipment, and in particular relates to a test device for testing the performance of a dual-motor system. Background Art

[0002] As the power unit of the electromechanical actuator, the motor needs to be tested before being assembled in the electromechanical actuator. Currently, based on the high reliability requirements of aerospace, dual-motor configuration is a major form of redundant electromechanical actuators. At this time, it is particularly important to test the working performance and fault tolerance of the dual motors.

[0003] At present, most motors are tested individually; there is no test device for dual-motor systems. Chinese patent CN216209709U, entitled "A servo motor speed test system", discloses a servo motor speed test system, which can test the torque, voltage, and current of a servo motor, and can achieve basic performance testing of a single machine, but cannot achieve comprehensive capacity testing of two motors output at the same time. Chinese patent CN109870305, entitled "A servo motor test bench", consists of a test bench hardware module and a test bench monitoring and analysis module. By replacing bearings with different fault categories and fault degrees, it can be used to simulate different fault categories and fault degrees of servo motor bearings, but it cannot achieve fault-tolerant performance testing between dual motors. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a test device for testing the performance of a dual-motor system. Two motors are installed on the test bench at the same time, and a differential and an electromagnetic brake are provided on the test bench. The output performance test of a single motor and two motors can be realized, and the fault tolerance performance test between the two motors can also be realized.

[0005] The invention provides a test device for testing a dual-motor system, comprising: a base, a positioning ruler, an A torque and speed sensor, a differential, an electromagnetic brake internal wiring board, an electromagnetic brake mounting shell, an A motor, a B motor, a B torque and speed sensor, an I shaft coupling, a load device, a load device connecting frame, a base fixed connection component, a C torque and speed sensor, a speed and torque sensor connecting frame, a II shaft coupling, a motor connecting frame, a support component connecting shaft, a support bearing stator locking nut, a support bearing housing, a support bearing I, a support bearing II, a bearing positioning steel sleeve, a support component locking nut component, a differential connecting key, an electromagnetic brake mover magnetic suction cup, and an electromagnetic brake stator.

[0006] The present invention provides a test bench solution for installing two motors on a test bench, and realizes coupling and isolation between the two motors through a differential and an electromagnetic brake, thereby solving the performance test and evaluation problem of a dual-motor system; a bracket is arranged on the test device, two motors are installed on one side, and a differential is installed on the other side, a first input shaft and a second input shaft of the differential are connected to the input shafts of the two motors, and an output shaft of the differential is connected to a load shaft; a first electromagnetic brake and a second electromagnetic brake are installed between the first input shaft and the second input shaft of the differential and the input shafts of the two motors, and are fixedly connected through an electromagnetic brake mounting shell; the first input shaft of the differential The first input shaft and the second input shaft are provided with two torque and speed sensors at the tail of the first input shaft and the second input shaft of the differential, and the third torque and speed sensor is arranged between the differential and the load device; the differential output shaft is provided with a support assembly, the support assembly includes a support assembly connecting shaft, a locking nut, a support bearing housing, a support bearing, etc. and is installed and positioned on the motor connecting frame; the motor connecting frame, the torque and speed sensor connecting frame, and the load device connecting frame are positioned and connected and fixed by a linear positioning ruler and a locking screw nut assembly; the base of the dual-motor system test device can be connected to the vibration and impact test bench through a fixed connection assembly.

[0007] The base of the present invention can be connected to the vibration and impact test bench through a fixed connection component, thereby realizing the functional performance test of the motor under environmental conditions such as random vibration test and impact test.

[0008] Furthermore, the test device provided by the present invention can simulate partial failures of two motors, simulate complete failures of a single motor, and simulate progressive failures of two motors.

[0009] The beneficial effects of the present invention are as follows:

[0010] 1. The present invention realizes the fault simulation test of the common output capacity when a single motor completely fails while the other motor works, or when the dual motors partially fail at the same time when the dual-station motors are working. Compared with the prior art, it realizes the test and verification of whether the fault-tolerant design of the dual-fault-tolerant motor meets the requirements of practical applications;

[0011] 2. The present invention simulates two progressive fault tests of dual motors. Compared with the prior art, it realizes the functional performance test that the A motor is braked (locked) after a partial fault, the B motor works alone, and further the B motor partially fails, the A motor is unlocked, and the two fault-tolerant motors work simultaneously;

[0012] 3. The device of the present invention can be installed on an impact vibration test bench due to its miniaturized design and a reserved installation interface. Compared with the prior art, it realizes the functional performance test of the motor under environmental conditions such as random vibration test and impact test. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations of the present invention. In the accompanying drawings:

[0014] Figure 1 is a general assembly diagram of a test device according to an embodiment of the present invention;

[0015] Figure 2 is a schematic diagram of output support of a test device according to an embodiment of the present invention;

[0016] Figure 3 is a schematic diagram of brake installation of a test device according to an embodiment of the present invention;

[0017] Among them: 1-base 2-positioning ruler 3-A torque speed sensor 4-differential 5-electromagnetic brake internal wiring board 6-electromagnetic brake installation shell 7-A motor 7-B motor 8-B torque speed sensor 9-Ⅰ shaft coupling 10-load device 11-load device connecting frame 12-base fixed connection assembly 13-C torque speed sensor 14-first electromagnetic brake 15-second electromagnetic brake 16-speed torque sensor connecting frame 17-Ⅱ shaft coupling 18-motor connecting frame 23-support assembly connecting shaft 24-support bearing stator locking nut 25-support bearing housing 26-support bearing Ⅰ 27-support bearing Ⅱ 28-bearing positioning steel sleeve 29-support assembly locking nut assembly 31-differential connection key 37-electromagnetic brake mover magnetic suction cup 38-electromagnetic brake stator DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] This embodiment provides a test device for testing a dual-motor system, including a schematic diagram of its composition as shown in FIG. Figure 1-3As shown, it includes: a base 1, a positioning ruler 2, a torque and speed sensor A 3, a differential 4, an electromagnetic brake internal wiring board 5, an electromagnetic brake mounting shell 6, an A motor 7, a B motor 7, a B torque and speed sensor 8, an I-axis coupling 9, a load device 10, a load device connecting frame 11, a base fixed connection assembly 12, a C torque and speed sensor 13, a speed and torque sensor connecting frame 16, an II-axis coupling 17, a motor connecting frame 18, a support assembly connecting shaft 23, a support bearing stator locking nut 24, a support bearing housing 25, a support bearing I 26, a support bearing II 27, a bearing positioning steel sleeve 28, a support assembly locking nut assembly 29, a differential connecting key 31, an electromagnetic brake mover magnetic suction cup 37, and an electromagnetic brake stator 38.

[0020] On the test device, the motor connecting frame 18 is installed with the A motor 7 and the B motor 7 on one side, and the differential 4 is installed on the other side. The first input shaft and the second input shaft of the differential are connected with the input shafts of the A motor 7 and the B motor 7, and the output shaft of the differential 4 is connected with the load device 10. The load loading assembly can realize stepless loading of 0-20Nm and 8000 rpm, wherein the torque is 0-150Nm and the speed is 10000 rpm.

[0021] The first electromagnetic brake 14 and the second electromagnetic brake 15 are installed between the first input shaft, the second input shaft and the two motor input shafts of the differential 4, and are fixedly connected through the electromagnetic brake mounting shell. The electromagnetic brake has a braking torque of 0-25Nm and a braking speed of 12000 rpm. The brake can achieve frequent braking of 0.1s / time.

[0022] Two torque speed sensors are arranged at the tail of the first input shaft and the second input shaft of the differential 4, and are arranged at the tail of the first input shaft (A torque speed sensor) and the second input shaft (B torque speed sensor 8) of the differential. The third torque speed sensor (C torque speed sensor 13) is arranged between the differential and the load device. The torque of A torque speed sensor 3, B torque speed sensor 8, and C torque speed sensor 13 are 0-50Nm and the speed is 22000 rpm.

[0023] The differential output shaft is provided with a support assembly, which includes: a support assembly connecting shaft 23, a support bearing stator locking nut 24, a support bearing housing 25, a support bearing I 26, a support bearing II 27, a bearing positioning steel sleeve 28, a support assembly locking nut assembly 29, a coupling connecting key 30, and a differential connecting key 31 and is installed and positioned on the motor connecting frame 18. The support assembly eliminates the problems of different axes and radial forces between the torque speed sensor and the differential caused by gravity and assembly tolerances, thereby extending the service life.

[0024] The base of the present invention can be connected to the vibration and impact test bench through a fixed connection component, thereby realizing the functional performance test of the motor under environmental conditions such as random vibration test and impact test.

[0025] Fault simulation switching: electromagnetic brake internal wiring board 5, the first electromagnetic brake 14, the second electromagnetic brake 15, the electromagnetic brake protective housing 6, A motor 7, B motor 7 installed in the differential 4 and fixed to the motor connecting frame 18 through the switching group fixing bolts, A torque speed sensor 3, B torque speed sensor 8 (torque 0-50Nm, speed 22000 rpm), fixed at the tail of the differential 4 (installed in Figure 1 The position shown in the figure) forms a fault simulation switching group. The torque and speed sensor installed at the tail of the differential can monitor the motor torque and speed and the braking effect and capacity of the electromagnetic brake (monitoring the braking time and whether braking is performed). When simulating a complete failure of a single motor, one of the brakes is braked to achieve a single performance test. The two intact motors are simulated to output a performance test together. The two brakes are opened at the same time to simulate a fault simulation test of the two motors' partial failures and common output performance. The two brakes are opened at the same time to achieve a dual-station fault-tolerant motor performance test, and can also be used to achieve a dual-station fault-tolerant motor fault test.

[0026] Control driver: The control driver is not shown in the figure. Its function is to control the drive motor, simulate partial and complete motor failures, frequently brake and open the electromagnetic brake, load the loading device, and perform dual-fault-tolerant motor performance tests.

[0027] The main functional performance tests are: motor rated voltage load performance (① minimum speed test at maximum torque ② maximum speed test at rated torque ③ maximum speed at no-load), high voltage load performance (① minimum speed test at maximum torque ② maximum speed test at rated torque ③ maximum speed at no-load), low voltage load performance (① minimum speed test at maximum torque ② maximum speed test at rated torque ③ maximum speed at no-load), continuous working load performance, polarity, torque coefficient, no-load back electromotive force coefficient, etc.

[0028] The test simulates partial failure of two motors: A (or B) motor works, B (or A) motor does not work (electromagnetic brake brakes B (or A) fault-tolerant motor). When the test device detects that the torque and speed capacity of A (or B) motor decreases, the electromagnetic brake brakes A (or B) motor, and A (or B) motor is powered off; B (or A) motor starts to work. When the test device detects that the torque and speed capacity of B (or A) motor decreases, the electromagnetic brake cancels the brake of A (or B), and A and B motors work at the same time, outputting torque and speed at the same time, simulating the failure of two motors. Both motors have only partial capacity left, and the motors output power at the same time. The functional performance test is realized, which mainly tests and verifies whether the design of the motor meets the requirements of actual design and application.

[0029] Simulate a complete failure of a single motor: The two motors work at the same time. When the test device detects that the torque and speed capabilities of motor A (or B) have decreased, the electromagnetic brake is used to brake motor A (or B) to simulate a single motor failure and complete inability to work, and the functional performance test of the other motor output power is realized; without testing the torque and speed of the motor through the test device, directly brake any motor to simulate a single motor failure and complete inability to work, and the functional performance test of the other motor output power is realized.

[0030] Simulation of two progressive faults of dual motors: the test device monitors the fault of A (or B) fault-tolerant motor, partial failure, brakes A (or B) motor, and B (or A) motor starts working functional performance test, and further simulates the fault of B (or A) motor, partial failure, A (or B) motor brake is opened, to achieve the functional performance test of A and B motors working partially at the same time.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test device for testing the performance of a dual-motor system, characterized in that: include: Base (1), positioning ruler (2), torque speed sensor A (3), differential (4), internal wiring board of electromagnetic brake (5), electromagnetic brake mounting shell (6), motor A (7), motor B (7ˋ), torque speed sensor B (8), inter-axis coupling (9), load device (10), load device connecting frame (11), base fixing connecting assembly (12), torque speed sensor C (13), first electromagnetic brake (14), second electromagnetic brake (15), Speed ​​torque sensor connecting frame (16), II shaft coupling (17), motor connecting frame (18), support assembly connecting shaft (23), support bearing stator locking nut (24), support bearing housing (25), support bearing I (26), support bearing II (27), bearing positioning steel sleeve (28), support assembly locking nut assembly (29), coupling connecting key (30), differential connecting key (31), electromagnetic brake mover magnetic chuck (37), electromagnetic brake stator (38).

2. A test device for testing the performance of a dual-motor system according to claim 1, characterized in that: The motor connecting frame (18) has an A motor (7) and a B motor (7') installed on one side and a differential (4) installed on the other side. The first input shaft and the second input shaft of the differential (4) are respectively connected to the input shafts of the A motor (7) and the B motor (7'), and the output shaft of the differential (4) is connected to the shaft of the load device (10).

3. A test device for testing the performance of a dual-motor system according to claim 2, characterized in that: The first electromagnetic brake (14) and the second electromagnetic brake (15) are installed between the first input shaft, the second input shaft and the two motor input shafts of the differential (4), and are fixedly connected via an electromagnetic brake mounting shell.

4. A test device for testing the performance of a dual-motor system according to claim 2, characterized in that: The first input shaft and the second input shaft tail of the differential (4) are respectively provided with an A torque speed sensor (3) and a B torque speed sensor (8), and a C torque speed sensor (13) is provided between the differential (4) and the load device (10).

5. A test device for testing the performance of a dual-motor system according to claim 1, characterized in that: The output shaft of the differential (4) is provided with a support assembly, which includes: a support assembly connecting shaft (23), a support bearing stator locking nut (24), a support bearing housing (25), a support bearing I (26), a support bearing II (27), a bearing positioning steel sleeve (28), a support assembly locking nut assembly (29), a coupling connecting key (30), and a differential connecting key (31); and the support assembly is installed and positioned on the motor connecting frame (18).

6. A test device for testing the performance of a dual-motor system according to claim 4, characterized in that: The torque and speed sensor installed at the tail of the differential (4) can monitor the motor torque and speed and the braking effect and capacity of the electromagnetic brake, thereby realizing a double-station fault-tolerant motor performance test.

7. A test device for testing the performance of a dual-motor system according to any one of claims 1 to 6, characterized in that: The base can be connected to the vibration and impact test bench through a fixed connection component to achieve functional performance testing of the motor under random vibration testing and impact testing.

8. A test device for testing the performance of a dual-motor system according to any one of claims 1 to 7, characterized in that: The functional performance test includes: motor rated voltage load performance, high voltage load performance, low voltage load performance, continuous working load performance, polarity, torque coefficient, and no-load back electromotive force coefficient.

9. A test device for testing the performance of a dual-motor system according to any one of claims 1 to 7, characterized in that: The following simulation tests can be implemented: simulation of partial failure of two motors, simulation of complete failure of a single motor, simulation of progressive failure of two motors.

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