Reliable disk brake of elevator

Abstract

The invention relates to a disc brake for a hoister, which comprises a brake cylinder, a disc spring and a lining plate. The brake cylinder comprises a brake cylinder body, a braking piston, a piezometric piston matched with the braking piston, and a brake cylinder head sleeved at the tail of the piezometric piston and connected with the brake cylinder body through screw threads; the middle part of the lining plate is provided with a step through hole, one end of the step through hole close to a brake shoe is embedded with a pressure plate, and the pressure plate is provided with a chamfer head screw connected with the braking piston and the lining plate; and the middle part of the tail end of the piezometric piston is provided with a piezometric oil port, the outside diameter ofthe piezometric piston is provided with a piston ring, and one side of the brake cylinder body is provided with a current vortex sensor. The brake can monitor performance parameters causing failure of the hoister brake in real time, improve the reliability of the hoister brake, monitor braking positive pressure of the brake in real time by detecting the oil pressure of the piezometric oil port, can conveniently adjust a clearance between the brake shoe and the brake disc by injecting hydraulic oil into a piezometric oil cavity, and can monitor brake clearance and moving conditions in real time through the current vortex sensor.

Description

technical field [0001] The invention relates to a brake, in particular to a reliable disc brake of a hoist suitable for mine hoisting. Background technique [0002] Mine hoist is one of the large-scale mining equipment and is the throat channel of coal mine production. Whether it can run safely and efficiently during use and brake in time in an emergency will directly affect the smooth operation of production and the life safety of miners. . The brake device is the most critical and the last safety guarantee device of the hoist, and its reliability is directly related to the safe operation of the hoist. Most mine hoist braking devices use disc brakes. During the operation of the hoist, although the braking torque multiple of the brake design is more than three times the static torque of the hoist, it still causes overwinding, Squat cans and other accidents. [0003] Chinese Patent No. CN91213532.8 discloses a mine hoist brake, which mainly uses a lining plate structure to...

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent No. CN91213532.8 discloses a mine hoist brake, which mainly uses a lining plate structure to fix the brake block to control the displacement of the brake shoe during the braking process, which can improve the shear resistance and braking effect. However, this brake cannot perform adaptive compensation and failure caused by internal damage

Patent Nos. 93115120 and 93246341 disclose a self-adaptive compensating booster brake for a hoist. On the basis of the original disc brake, the cavity formed by the sealing back cover, the piston and the oil distribution cover is used as the compensation pressure chamber. There is an oil inlet hole on the back cover to feed oil. When the braking force is insufficient, the compensation pressure station starts to supply pressure oil to the compensation pressure chamber, increasing the positive pressure of the brake on the brake disc, that is, the braking force, and improving the reliability of the brake. It realizes self-adaptive supercharging, reduces the cost, and basically prevents the occurrence of accidents, but its structure is complex, and it cannot monitor the failure caused by the internal damage of the brake in real time

Patent Nos. 200720038626 and 200710025205 disclose a disc brake that monitors the positive pressure of the brake under the braking state, mainly through the tension sleeve and sensor in the brake to directly measure the positive pressure under the braking state, so as to real-time Monitor the size of the braking torque and check whether the total braking torque is greater than 3 times the maximum static torque (coal mine safety regulations) when the hoist brake is fully braked. This type of brake has the advantages of compact structure and high measurement accuracy, but its structure is complex , the cost is high, and the performance failure caused by the internal damage of the brake shoe (brake shoe wear) and fatigue cannot be diagnosed; the patent No. 200720090207 discloses a normally open hydraulic disc brake with automatic compensation and wear display, which has automatic compensation and The wear display function of the friction plate can ensure that the back distance between the friction plate and the brake disc is always constant, and the braking torque is large and stable and reliable, but its structure is complex, and the performance failure caused by fatigue cannot be diagnosed and repaired

[0004] To sum up, most of the existing hoist disc brakes are slightly modified on the original basis to optimize the structure and monitoring functions, but they can only make a limited diagnosis of external damage to the parts, and the overall structure is still relatively small. It is relatively complicated, and the performance failures caused by brake shoe wear, disc spring fatigue fracture and piston seizure cannot be diagnosed, analyzed and repaired in time.

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