Principle of electric hoist and operation of electric hoist

Description :

　　Electric hoist is a special lifting equipment installed on overhead cranes and gantry cranes. It has the characteristics of small size, light weight, simple operation, and convenient use, and is used in industrial and mining enterprises, storage terminals, and other places.

　　Structure of electric hoist: The lifting capacity is generally 0.1-80 tons, and the lifting height is 3-30 meters. Composed of an electric motor, transmission mechanism, and drum or sprocket, it is divided into two types: wire rope electric hoist and loop chain electric hoist. The electric chain hoist is divided into two types: imported and domestically produced; The wire rope electric hoist is divided into single speed lifting and dual speed lifting; Micro electric hoist, winch, multifunctional hoist.

　　Reducer, lifting motor, running motor, flame arrester, cable sliding wire, drum device, hook device, coupling, flexible cable current inlet, etc. integrate power and braking force.

　　Parameters of electric hoist: lifting capacity: 0.25t-60t

　　Lifting height: 3m-30m

　　Job level: M3

　　Running speed: 20 (30) m/min

　　Lifting speed: 8m/min

　　Installation and use of electric hoists: Electric hoists are generally installed on single beam cranes, bridge cranes, gantry cranes, and suspension cranes. With slight modifications, it can also be used as a winch. Therefore, it is an essential machinery for improving labor efficiency and improving working conditions.

　　Operating conditions for electric hoist: ambient temperature: -20 ℃ to+40 ℃

　　Work system: Intermediate JC25%

　　Heavy level: JC40%

　　Characteristics of electric hoist: The advantage of wire rope electric hoist is its small length and size, and the motor is installed inside the drum of the electric hoist.

　　The electric hoist has a compact structure, and the electric hoist with the motor axis perpendicular to the drum axis adopts a worm gear transmission device. Its disadvantages are: large length, large width, bulky structure, low mechanical efficiency, and difficult processing. The hydraulic system has dual control, and both the overflow regulating valve and the magnetic contact pressure gauge can control the pressure. The electrical control department has adopted low-voltage control to increase the safety of the control system, and there are no manufacturers producing products with this structural type anymore.

　　The use of electric hoists can be said to be very widespread, but there may be very few personnel who can correctly utilize the advantages of electric hoists for operation. I suggest that everyone should learn more about the characteristics of electric hoists and their knowledge, so that they can be better used.

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