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CN-122016292-A - Permanent magnet power-off brake test equipment and test method

CN122016292ACN 122016292 ACN122016292 ACN 122016292ACN-122016292-A

Abstract

The invention relates to a testing device and a testing method for a permanent magnet power-off brake, wherein the testing device comprises a reference platform, a motor, a torque sensor, a brake pad switching shaft and a brake disc guide rail, the motor, the torque sensor, the brake pad switching shaft and the brake disc guide rail are sequentially arranged on the reference platform from left to right, and the motor is connected with the brake pad switching shaft through the torque sensor. The brake pad adapter shaft is used for installing a rotor assembly of the permanent magnet power-off brake, and the brake disc guide rail is used for installing a stator assembly of the permanent magnet power-off brake. According to the invention, a motor, a torque sensor, a brake pad switching shaft and a brake disc guide rail are sequentially arranged on a reference platform, a rotor component of a permanent magnet power-off brake is arranged on the brake pad switching shaft, and a stator component of the permanent magnet power-off brake is arranged on the brake disc guide rail, so that the permanent magnet power-off brake test equipment is constructed.

Inventors

  • YUAN YI
  • YI GANG

Assignees

  • 钛虎机器人科技(上海)有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The test equipment of the permanent magnet power-off brake is characterized by comprising a reference platform (1), a motor (2), a torque sensor (3), a brake block adapter shaft (4) and a brake disc guide rail (7), The motor (2), the torque sensor (3), the brake pad adapter shaft (4) and the brake disc guide rail (7) are sequentially arranged on the reference platform (1) from left to right; the motor (2) is connected with the brake pad switching shaft (4) through the torque sensor (3), The brake block adapter shaft (4) is used for installing a rotor assembly of the permanent magnet power-off brake, and the brake disc guide rail (7) is used for installing a stator assembly of the permanent magnet power-off brake.
  2. 2. The permanent magnet power-off brake test equipment according to claim 1, wherein the output end of the motor (2) is connected with the first end of the torque sensor (3) through a first coupling (5), and the second end of the torque sensor (3) is connected with the brake pad switching shaft (4) through a second coupling (6).
  3. 3. Test equipment for a permanent magnet power-off brake according to claim 2, characterized in that the first coupling (5) and the second coupling (6) are rigid couplings.
  4. 4. A permanent magnet power-off brake testing device according to claim 1, characterized in that the reference platform (1) is provided with a first stationary base (8), the first stationary base (8) being used for placing the motor (2).
  5. 5. A permanent magnet power-off brake testing device according to claim 1, characterized in that a second stationary base (9) is provided on the reference platform (1), the second stationary base (9) being used for placing the torque sensor (3).
  6. 6. The permanent magnet power-off brake testing device according to claim 1, characterized in that an adjusting unit is arranged on the brake disc guide rail (7) for adjusting the air gap distance between the stator assembly and the rotor assembly.
  7. 7. The permanent magnet power-off brake testing device according to claim 6, wherein a laser tracker is arranged on the reference platform (1), and the laser tracker is used for acquiring the air gap distance between the stator assembly and the rotor assembly.
  8. 8. A dynamic band-type brake torque testing method based on a permanent magnet power-off brake testing device, characterized in that the permanent magnet power-off brake testing device according to any one of claims 1-7 is used, comprising the following steps: S1, mounting a rotor assembly of a permanent magnet power-off brake on a brake pad adapter shaft (4), mounting a stator assembly of the permanent magnet power-off brake on a brake disc guide rail (7), and adjusting the air gap distance between the stator assembly and the rotor assembly through an adjusting unit; S2, starting the motor (2), and enabling the motor (2) to drive the brake pad switching shaft (4) to rotate at a preset rotating speed, so that the rotor assembly is in a stable running state; s3, triggering a permanent magnet power-off brake to power off when the rotor assembly stably runs, enabling the stator assembly and the rotor assembly to generate braking action, and collecting moment data in the braking process through the moment sensor (3); and S4, extracting an instantaneous maximum moment value in the braking process from the acquired moment data, and determining the instantaneous maximum moment value as the dynamic band-type brake torque.
  9. 9. A method of dynamic band-type brake torque testing as defined in claim 8, further comprising the steps of: s5, recording the outage time of the permanent magnet outage brake as T0; S6, determining the moment corresponding to the moment rising to 90% of the instantaneous maximum moment value as T1 according to the acquired moment data; And S7, calculating a time difference delta T between T1 and T0, wherein delta t=T1-T0, and determining the time difference as the electromechanical comprehensive response time of the permanent magnet power-off brake.
  10. 10. A static band-type brake torque testing method based on a permanent magnet power-off brake testing device, characterized in that the permanent magnet power-off brake testing device according to any one of claims 1-7 is used, comprising the following steps: S1, mounting a rotor assembly of a permanent magnet power-off brake on a brake pad adapter shaft (4), mounting a stator assembly of the permanent magnet power-off brake on a brake disc guide rail (7), and adjusting the air gap distance between the stator assembly and the rotor assembly through an adjusting unit; S2, controlling the motor (2) to output initial driving torque when the permanent magnet power-off brake is in a braking state, and applying torque to the rotor assembly through the brake block adapter shaft (4); S3, gradually increasing the output torque of the motor (2), and monitoring the output torque in real time through the torque sensor (3); And S4, when the rotor assembly starts to rotate, recording a moment value corresponding to the moment, and determining the moment value as the static band-type brake torque.

Description

Permanent magnet power-off brake test equipment and test method Technical Field The invention relates to the technical field of brake testing, in particular to a permanent magnet power-off brake testing device and a testing method. Background The permanent magnet power-off brake is widely applied to a servo driving system, a robot executing mechanism, automatic equipment and a safety protection system, realizes a braking function by means of permanent magnet force in a power-off state, and is an important component for guaranteeing equipment positioning precision and operation safety. The key performance parameters of the permanent magnet power-off brake mainly comprise indexes such as dynamic band-type brake torque, static band-type brake torque, response time and the like, and the parameters directly influence the braking reliability of equipment and the system safety level. In the prior art, the performance test for the permanent magnet power-off brake mainly adopts the following modes: Firstly, the whole machine assembly test mode is that a brake is arranged in a whole machine or a simulated load system to carry out overall performance test. The method has the following problems that the test result is influenced by a plurality of factors such as a motor, a transmission structure, assembly tolerance and the like, the actual performance of a single brake component cannot be accurately reflected, meanwhile, the test working condition is limited, and torque peak value and response time data in the dynamic braking process are difficult to accurately obtain under the controllable condition. And secondly, a special static torque testing device applies a rotating force to the output shaft of the brake through a lever, a weight or a loading mechanism until slipping occurs to measure the torque of the static band-type brake. The device can only perform static test generally, cannot simulate the dynamic braking process of the brake in a rotating state, is mainly mechanically loaded, and has the problems of large impact, low precision, poor repeatability and the like. And thirdly, the brake test is carried out by cutting off the power supply after the brake is driven to rotate by a common motor. However, the device has the defects of insufficient structural rigidity, large vibration interference, high torque signal noise and the like, is difficult to accurately capture the instantaneous dynamic band-type brake torque, and meanwhile, lacks synchronous acquisition capability for the triggering moment and the torque change process, and cannot accurately calculate the response time. In addition, the existing testing device is not provided with a structure capable of accurately adjusting the air gap between the stator assembly and the rotor assembly, the air gap adjustment depends on experience or a simple mechanical adjustment mode, the testing repeatability is insufficient, and the testing data stability is poor. Disclosure of Invention It is an object of the present invention to provide a permanent magnet power-off brake test apparatus and method that solves or at least alleviates one or more of the above-mentioned and other problems of the prior art. In order to achieve the aim, according to a first aspect of the invention, a permanent magnet power-off brake testing device is provided, wherein the device comprises a reference platform, a motor, a torque sensor, a brake pad adapter shaft and a brake disc guide rail, The motor, the torque sensor, the brake pad switching shaft and the brake disc guide rail are sequentially arranged on the reference platform from left to right; the motor is connected with the brake pad adapter shaft through the torque sensor. The brake pad adapter shaft is used for installing a rotor assembly of the permanent magnet power-off brake, and the brake disc guide rail is used for installing a stator assembly of the permanent magnet power-off brake. In the foregoing permanent magnet power-off brake test apparatus, optionally, an output end of the motor is connected to a first end of the torque sensor through a first coupling, and a second end of the torque sensor is connected to the brake pad adapter shaft through a second coupling. In the permanent magnet power-off brake test apparatus as described above, optionally, the first coupling and the second coupling are rigid couplings. In the permanent magnet power-off brake test device as described above, optionally, a first fixing base is disposed on the reference platform, and the first fixing base is used for placing the motor. In the permanent magnet power-off brake test device as described above, optionally, a second fixing base is disposed on the reference platform, and the second fixing base is used for placing the torque sensor. In the permanent magnet power-off brake testing device as described above, optionally, an adjusting unit is disposed on the brake disc guide rail, and the adjusting unit is used for adjusting the air gap distance