The brake is a deceleration or stopping device used in a mechanism or machine. It is an important part of the equipment. Therefore, when we select the brake, we should select it according to the use requirements and working conditions. The following points should be considered when choosing:
1. The nature and working conditions of the machine or organization to be applied. For example, normally closed brakes must be used for the lifting and luffing mechanisms of the crane. For horizontally running vehicles and hoisting machinery and rotating mechanisms, in order to control the magnitude of the dynamic torque for accurate parking, normally open brakes are often used.
2. Full attention should be paid to the task of the brake. For example, the braking torque supporting the article brake must have sufficient margin, that is, a certain safety factor should be guaranteed. For institutions with high safety requirements, dual brakes must be installed. For example, a lifting mechanism for transporting molten metal or flammable or explosive materials must be equipped with two brakes, each of which can independently and safely support molten iron Carry items such as bags without falling. Another example is the mine hoist. In addition to the blue brake on the high-speed shaft, the brake is also set on the drum or sheave shaft. For the heavy object falling brake (ie sliding brake), heat dissipation should be considered, and there must be enough The heat dissipation area enables it to dissipate the heat generated by the heavy level energy during braking, so as to avoid overheating and braking failure.
3. The place of application should be considered. For example, when there is enough space at the place where the brake is installed, an external brake can be selected, and where the space is limited, an inner shoe, band or disc brake can be used.
