Briefly describe the characteristics of electric hoist and its working conditions
Electric hoist is an indispensable machine to improve labor efficiency and improve working conditions. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the axis of the drum adopts a worm gear transmission device. Its disadvantages are: large length dimension, large width dimension, rough structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the pressure can be precisely controlled by the overflow regulating valve and the magnetic contact pressure gauge. The electrical control department adopts low-voltage control, which increases the safety of the control system. Electric hoists are mainly divided into: electric chain hoist, electric hoist (explosion-proof hoist), anti-corrosion electric hoist, double drum electric hoist, hoist, miniature electric hoist, group hoist electric hoist, and multi-function hoist. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the axis of the drum adopts a worm gear transmission device. Its disadvantages are: large length dimension, large width dimension, rough structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the pressure can be precisely controlled by the overflow regulating valve and the magnetic contact pressure gauge. The electrical control department adopts low-voltage control, which increases the safety of the control system.
Application areas: lifting, dragging, loading and unloading heavy objects, oil tank upside-down welding, such as the installation and movement of various large and medium-sized concrete, steel structures and mechanical equipment, suitable for civil engineering and bridge construction of construction and installation companies, factories and mines, Power, shipbuilding, automobile manufacturing, construction, highways, bridges, metallurgy, mines, slope tunnels, shaft treatment and protection, and other infrastructure construction machinery and equipment.
The characteristics of the working conditions of the electric hoist: It is a short-time intermittent work system. The transmission device is hung on the I-beam through a walking trolley and is in a suspended state. It is impossible for the electric hoist to be equipped with a hydraulic coupling. The rated speed of the high-speed shaft of the electric hoist is generally 1400r/min. The electric hoist adopts a conical rotor brake motor, and axial force occurs when it starts and stops; axial force occurs when the wire rope moves up and down, and the reducer is also required to have a structure to resist the axial force.
