Electric hoists are made of steel vanadium and combined with various traveling trolleys to form various types of hoist cranes. Common ones are electric single beam crane, electric suspension crane, hoist gantry crane, hoist fixed column suspension crane, hoist wall crane, light hoist double beam crane, which electric hoist is the steel wire, ring chain electric hoist, etc., as well as hanging rail electric hoist used separately by electric hoist, And most hoist cranes use the form of ground control.
Electric wire rope hoist has the following characteristics:
1. The design basis level is M4 and the design life is 10 years.
2. Compact structure and good grouping. "Three in one" driving device is adopted for lifting and operating mechanism, that is, motor, brake and reducer are integrated.
3. It is easy to install, adjust, use and maintain. It can be connected with different forms of running trolley to form various forms of electric hoist.
4. Safe and reliable, using a variety of safety protection devices and measures. The motor adopts thermoelectric protection to limit the temperature rise of the motor, and bismuth metal temperature control protection device is installed in the winding, which can prevent the motor from overheating due to overload or too frequent startup for several times; The motor shaft head directly Milles helical teeth as the first transmission main spur gear, which changes the braking torque with the change of load and improves the braking performance; The second brake can be installed as required; The drum is equipped with a rope guide to prevent rope disorder; It is equipped with upper and lower two-way limit devices and has phase sequence protection function; Equipped with power-off limiter; Emergency stop device; Equipped with lifting capacity limiter or with lifting capacity digital display device; The operating mechanisms are bilateral driven and equipped with protective devices.
5. The picking device is composed of a hook with a protective hook, a limit core steel wire rope and a drum. The drum shell is a square support, which is convenient for connection with various running trolleys. The rope guide on the drum is split, which is convenient for disassembly and adjustment.
6. There are two kinds of lifting speeds, one is the constant speed two-stage squirrel cage motor, and the other is the two-speed winding 2 / 12 stage (speed ratio 1:4) squirrel cage motor.
7. The driving mode of running mechanism (also known as running trolley) includes manual (S-type), chain (H-type) and electric (E-type). The driving device for single machine running trolley is GW type, and the driving device for double beam trolley is go type. The operating motor can be divided into single speed and double speed. The single speed is conical squirrel cage type two-stage (or four-stage) motor, the double speed is conical squirrel cage type double winding 2 / 8 (speed ratio 1:4) motor, and the brake is plane brake.
8. The electrical control part of the electric hoist is installed in the electrical switch box on the non motor side of the drum. The box is equipped with the magnetic starting machine for controlling the forward and reverse rotation of the lifting and running motor and the frequency converter for low-voltage operation. The operation button switch (manual door) can be divided into single speed and double speed, and is equipped with an electric key. The operation voltage is 42V.