An electric wire rope hoist is a special kind of lifting equipment, which can be installed on I-beams alone or electric or manual single-beam, double-beam, cantilever, gantry, and other cranes. The motor generally uses a cone-type motor, which automatically locks the brake after stopping, and the supporting wire ropes include phosphating coated wire ropes, galvanized wire ropes, and smooth wire ropes.
It has the characteristics of small size, lightweight, simple operation, and convenient use. It is used in industrial and mining enterprises, storage, docks, and other places. With a little modification, it can also be used as a hoist. Therefore, it is an essential machine to improve labor efficiency and improve labor conditions.
一．The composition of the electric wire rope
二．Components
The parts of a wire rope electric hoist can be roughly divided into:
The functions of each part are as follows:
Reducer: It is a three-stage fixed-axis helical gear transmission mechanism. The gears and gear shafts are made of heat-treated alloy steel. The box body and box cover are made of high-quality cast iron, with tight assembly and good sealing.
Control box: It is a device that can cut off the main circuit in an emergency, and has an upper and lower stroke protection section fire limiter.
Wire rope: It is a heavy-duty wire rope, which ensures durability. Conical motor: The hoisting motor adopts a large dynamic torque conical rotor to brake the asynchronous motor, and no external brake is required.
Button switch: Hand-operated, light and flexible, divided into pendent control and remote control.
三．Application field
Electric wire rope hoists are mainly used for lifting, pulling, loading and unloading heavy objects, and welding oil tanks upside down, such as the installation and movement of various large and medium-sized concrete, steel structures and mechanical equipment. Machinery and equipment for infrastructure projects such as bridge construction, electric power, shipbuilding, automobile manufacturing, construction, highways, bridges, metallurgy, mining, slope tunnels, shaft management and protection.
四．Troubleshooting
1. After starting, the motor does not rotate and heavy objects cannot be lifted
(1) Excessive overloading, overloading is not allowed
(2) The voltage is more than 10% lower than the rated voltage, wait for the voltage to return to normal
(3) The electrical appliance is faulty, the wire is disconnected or the contact is poor, repair the electrical appliance and the circuit
(4) The brake wheel and the rear end cover are corroded and seized, and the brake wheel cannot be disengaged. Remove the brake wheel and clean the rusted surface
(5) Motor sweep, deal with fault number 9
(6) The wire is too thin, replace the wire
2. The braking is unreliable, and the sliding distance exceeds the specified requirements
(1) Due to the large wear of the brake ring or other reasons, the spring pressure is reduced and the spring pressure is adjusted
(2) The brake ring is in poor contact with the tapered surface of the rear end cover, remove it for grinding
(3) There is oil on the braking surface, remove it for cleaning
(4) The brake ring is loose, replace the brake ring
(5) The pressure spring is fatigued, replace the spring
(6) If the coupling fails to move or is stuck, check its connection part
(7) The conical rotor’s turbulence is too large, adjust it according to the regulations
3. The temperature of the motor is too high
(1) overload use, load reduction use
(2) The operation is too frequent, and the number of operations is reduced
(3) The brake clearance is too small, and the brake ring is not completely disengaged during operation, which is equivalent to an additional load. readjust
4. The noise of the reducer is too loud
(1) Poor lubrication, disassembly, and maintenance
5. The motor makes a humming sound when starting
(1) There are a few phases of power supply and motor, repair or replace the contactor
6. The heavy object rises to mid-air and cannot be restarted after parking
(1) The voltage is too low and the fluctuation is large, wait for the voltage to recover before restarting
(2) Overload lifting, load reduction use
7. After starting, it cannot stop, or when it reaches the limit position, it still does not stop
(1) The contacts of the AC contactor are welded, and the main power supply is quickly cut off, disassembled, and repaired.
(2) If the limiter fails, replace the AC contactor
(3) The inner wire head of the limiter is wrongly connected, and the circuit of the limiter is repaired.
8. reducer oil leakage
(1) Between the box body and the box cover, the sealing ring is poorly assembled or damaged, remove it for inspection or replace the sealing ring
(2) The connecting screw is not tightened, tighten the screw
(3) Excessive refueling, refuel according to regulations
DEJUN Crane has 34 years of experience in the field of hoists. It is a manufacturer specializing in customized products according to customer needs. If you are interested in our products, please come to consult.
