Electric hoists are combined with various running trolleys to form various types of hoist cranes. The common ones are electric single girder cranes, electric suspension cranes, hoist gantry cranes, hoist fixed column suspension cranes, hoist wall-mounted cranes, light-duty Hoist double girder crane, wire rope electric hoist, electric chain hoist, etc. There are also suspended rail electric motor used alone with electric hoists, and most hoist cranes are ground-operated.
Wire rope electric hoist has the following characteristics:
1, The design benchmark level is M4, and the design life is 10 years.
2, Compact structure and good grouping. The hoisting and running mechanism adopts the “three-in-one” drive device, that is, the motor, the brake and the reducer are three in one.
3, Installation, adjustment and use, easy maintenance, can be connected with different types of running trolleys to form various types of electric hoists.
4, Safe and reliable, a variety of safety protection devices and measures are adopted. The motor adopts thermoelectric protection to limit the temperature of the motor, and the winding is equipped with a bismuth metal temperature control protection device, which can prevent the motor from overheating due to overloading or starting several times too frequently; the motor shaft head is directly milled with helical teeth as the first drive main spur gear, The braking torque changes with the load, which improves the braking performance; the second brake can be installed as required; the rope guide is installed on the drum to prevent the rope from being disordered; 2.4.5 The upper and lower two-way limit devices are installed. Phase sequence protection function; equipped with power-off limiter; emergency stop device; equipped with lifting weight limiter or with lifting weight digital display device; operating mechanisms are bilaterally driven and have protection devices.
5, The pick-up device is composed of a hook with a protective hook, a limit core wire rope and a reel. The reel shell is a square bracket, which is easy to connect with various running trolleys. The rope guide on the reel is a split type, which is convenient for Disassembly and adjustment.
6, There are two types of hoisting speeds, one is using a constant-speed two-stage squirrel-cage motor, and the other is using a two-speed winding 2/12-stage (speed ratio 1:4) squirrel-cage motor.
7, The driving modes of the running mechanism (also known as the running trolley) are manual (S-type), chain-driven (H-type) and electric (E-type). The driving device used for the single-machine running trolley is the GW type, and the double-girder trolley is the GO type. The running motor is divided into single-speed and double-speed. The single-speed is a cone-type squirrel-cage two-stage (or four-stage) motor, the two-speed is a cone-type double-winding 2/8 (speed ratio 1:4) motor, and the brake is a plane brake .
8, The electrical control part of the AS type electric hoist is installed in the electrical switch box on the non-motor side of the reel. The box is equipped with a magnetic starting machine that controls the forward and reverse rotation of the hoisting and running motor, and a frequency converter for low-voltage operation. The operating button switch (manual door) is divided into single and double speed, and has an electric key, and the operating voltage is 380V.
Post time: Mar-04-2022