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< >Brake is mostly achieved by the friction of friction, which is a kinetic energy that converts heat energy. The process, the friction material used as the friction pair, is first of all a guarantee for the safety and reliability of the brake. The brake shoe is the main part of the mine hoist brake. If the friction coefficient and other properties of the brake shoe fail to meet the design requirements, equipment and personal accidents may occur.
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< >It turns out that most of the brake shoes used in our country are made of asbestos material. Its characteristics are: high melting point, large friction coefficient, good mechanical strength, and strong adsorption with adhesives. force. However, asbestos brake shoes also have shortcomings that are difficult to overcome:
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< > Due to the poor thermal conductivity of asbestos, friction heat is difficult to disappear quickly, resulting in a thickened thermal decay layer and increased wear, and pollutes the environment, especially asbestos Fiber dust can cause cancer in the human body
< >. In order to improve the friction coefficient and heat dissipation performance, high-hardness friction agents and steel wool are mostly used
< >. Asbestos is in:>
℃:>< br/>After complete dehydration and decomposition at ℃, its strength decreases
< >, and asbestos is prone to thermal degradation of friction properties.
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< >The hoisting system is the throat of mine production. The braking device is the last and most critical safety system of the hoist. Its main implementation form is a disc brake. . Braking is mostly achieved by the friction of the friction pair. It is a process in which kinetic energy is converted into heat energy. The friction material used as the friction pair is first of all a guarantee for the safety and reliability of the brake. The brake shoe is the main part of the mine hoist brake. If the friction coefficient and other properties of the brake shoe fail to meet the design requirements, equipment and personal accidents may occur. During the mine production process, the disc brake shoe frequently rubs against the brake disc to control the normal operation of the elevator. Once the brake shoe fails, it will cause a major accident in the elevator. Therefore, it is particularly important to choose disc brake shoes with high friction coefficient and long service life.
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