Electric hoist gantry crane rotary mechanism failure analysis and solutions

        Other than gantry crane and  overhead gantry crane   have in common, there are many differences, such as the rotating mechanism, luffing mechanism, etc., in the metal structure also has its own unique, so there are special fault conditions place, the following is an electric hoist gantry crane rotating mechanism fault phenomena, cause analysis and troubleshooting methods.

An electric  hoist gantry crane  pulled the master controller handle rotation mechanism, institutions no action

(1) Analysis:

a zero contacts being exposed or damaged.

b voltage relay coil circuit or wire disconnected.

c overcurrent relay normally closed contact is closed.

d bolts loose wiring, poor contact, tighten the bolts.

(2) Remedy: Repair or replace the electric hoist gantry crane all related components.

2, the electric hoist  bridge gantry crane  rotation speed is slow, less than the rated speed

(1) Analysis: a control panel in an accelerating contactor pull well, it will lead to the next level and beyond contactor can not pull, so the motor rotor resistance can not be connected to the appropriate people removed, the motor of less than the rated speed.

(2) Remedy: Check the step by step each electric hoist gantry crane acceleration respective contacts normally open contact, making good contact at work, at all levels of circuit flow.