A method for fault detection of a braking device

Abstract

The invention discloses a fault detection method for a braking device, which comprehensively detects and diagnoses the reliability of the action cooperation between a brake shoe and each sector on a brake drum. Plum Blossom Bamboo performs static and dynamic detection on the braking device. In the static detection, a torque current in a specific direction is applied to the traction machine when the brake is closed to observe the slippage of the traction sheave; in the dynamic detection, Set the switching sequence between sectors through the sector management unit, release the brake and drive the hoisting machine to rotate. When the hoisting machine rotates a certain mechanical angle, close the brake and cut off the power supply of the hoisting machine, and observe the rotation of the hoisting machine. Stopping distance to stop. By judging the static and dynamic detection results of each sector, the fault condition of the braking device is diagnosed. The invention has a high diagnostic coverage rate, can check out the subtle abnormality of the braking device, and can prevent the minor and gradual progress, and effectively prevent the occurrence of safety accidents caused by the failure of the braking device.

Description

technical field [0001] The invention relates to a fault detection method of a braking device. Background technique [0002] At present, there are many technologies about braking force detection in the domestic industry, but there are certain defects. [0003] For example, in patents 200810094853.0 and 02829758.X, the test can only be carried out on a specific floor, and the resistance test of the elevator is required before the test to determine the test torque of the elevator, which makes the testing process complicated and has many restrictions and low flexibility; [0004] Another example is patent 200810037218.9. This technology applies diagnostic and pre-diagnostic torque to the motor under the braking state, and judges the braking force by detecting the slippage of the car. However, it can only detect the braking force of the braking surface where the brake shoe is located. However, the braking condition of the entire braking device cannot be fully detected. For motor...

AI Technical Summary

Problems solved by technology

However, since the braking force of the brake is far beyond the output torque capacity of the elevator inverter in normal times, in order to realize this technology, it is necessary to use a larger-capacity inverter, so the economic benefit is low

[0006] At the same time, the above technologies still have the following deficiencies: insufficient consideration of the effective mode of braking, such as the oil leakage of the main engine, the oil throwing of the wire rope, and the rusting of the brake drum, so that the local surface of the brake drum is covered with oil, affecting the brake drum. Partial braking force, and in the early stage of the accident, the probability of insufficient braking force is relatively low through the above-mentioned technology, so it cannot be prevented, and it is easy to leave safety hazards and cause safety accidents

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