How to deal with common faults of electric chain hoist
Electric chain hoist is an electric hoist that is widely used in the industry. No matter any product is used for a period of time, there may be problems of one kind or another. Today, electric chain hoist manufacturers will teach you how to be a chain. What to do when the electric hoist fails:
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
⑷ 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
⑸Motor sweep, deal with the fault number 9
⑹The wire is too thin, replace the wire
2. The braking is unreliable, and the sliding distance exceeds the specified requirements
⑴Due 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
⑷ The brake ring is loose, replace the brake ring
⑸ The pressure spring is fatigued, replace the spring
⑹ If the coupling fails to move or is stuck, check its connection part
⑺ The conical rotor's turbulence is too large, adjust it according to the regulations
3. The temperature of the motor is too high
⑴ 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 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 or
(2) 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
