Abstract
In industrial production, there are strict requirements for the braking effect of heavy transport equipment such as elevator and belt conveyor. The working capacity and reliability of the brake are the basis for ensuring efficient production. Based on the friction and wear test, taking the average friction coefficient and stable wear rate as the key parameters to measure the reliability and stability of the brake, the friction and wear characteristics of the hydraulic disc brake of the hoist under different working conditions are analyzed and studied. The results shows that the average friction coefficient and stable wear rate of the brake fluctuate less with the change of brake pressure in the middle speed range. At this time, the adhesive and matrix fiber in the friction pad have not been decomposed and modified, and the strength and shape of the surface micro convex structure are relatively moderate, so the braking reliability is in good condition.
Highlights
In the contemporary industrial production, the elevator is an indispensable transportation equipment in many industries and fields [1], which undertakes the transportation of personnel, materials and equipment, and is an important hub associated with different processes [2]
The results shows that the average friction coefficient and stable wear rate of the brake fluctuate less with the change of brake pressure in the middle speed range
The friction and wear characteristics of the brake are tested based on the link 3900 NVH test machine, and the worn surface morphology of the friction pad is analyzed by tm3000 SEM
Summary
In the contemporary industrial production, the elevator is an indispensable transportation equipment in many industries and fields [1], which undertakes the transportation of personnel, materials and equipment, and is an important hub associated with different processes [2]. With the development of production technology, domestic industrial production tends to be safe and efficient year by year [3], which puts forward higher and stricter requirements for the working performance of the hoist. As one of the most important parts of the hoist, the hydraulic brake directly determines whether the hoist can decelerate, stop and other tasks can be successfully completed, and affects the safety of the hoisting work. There are mainly two types of hydraulic brake for the hoist: brake shoe type and disc type. Compared with the brake shoe brake, the disc brake appears later, but its application rate is higher because of its large effective contact area of friction pair, good friction stability, stronger adaptability to harsh environment such as humidity and dust [4]. The friction and wear characteristics of the brake are tested based on the link 3900 NVH test machine, and the worn surface morphology of the friction pad is analyzed by tm3000 SEM
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