Views: 70 Author: Site Editor Publish Time: 2019-12-27 Origin: Site
Brief Analysis of General Working Principle of Electric Hoist
Electric hoists are often used on monorail cranes, jib cranes and moving single-beam cranes. Due to their simple structure, convenient manufacturing and maintenance, good interchangeability, and easy operation, they are widely used in factories. Electric hoists can be divided into general electric hoists and special electric hoists according to their uses. The working principles of the two electric hoists are as follows:
Start the hoisting motor first, lift the heavy object to the proper height, then start the running motor to carry the heavy object to the designated position, and the running trolley will walk on the lower edge of the single I-beam. When traveling, a motor is used to drive the wheels on both sides of the trolley. Because the walking speed is relatively small, the running trolley generally does not have a braking mechanism. When the running trolley is walking, an electromagnetic brake is set on the lifting mechanism to prevent the heavy objects from falling. The brake relies on the pressure of the spring to compress the inner and outer disks. The principle is similar to that of a friction clutch. When the brake is released, the electromagnet is used to attract the outer disk to release the inner and outer disks.