Ac reducer part of fault and maintenance

Ac speed reducer part of faults and maintenance:

Speed reducer failure are as follows:

(1) motor terminal box screw loose poor contact;

(2) the internal wiring bad welding;

(3) the motor winding wire break.

9. What are the causes of abnormal motor vibration and sound?

Mechanical aspects:

(1) poor lubrication bearing, bearing wear;

(2) bearing chamber is too large.

(3) fastening screw loose;

(4) motor with sundry.

Electromagnetic aspects:

(1) the motor overload operation;

(2) three phase current balance;

(3) lack of phase,

(4) of the stator, rotor winding short-circuit fault;

(5) caused by the welding part of the open welding of cage rotor broken bar.

10. The cause of the motor bearing overheating have?

The motor itself:

(1) the bearing inner and outer ring with tight;

(2) parts shape tolerance has a problem, such as frame, end cover, shaft parts alignment is bad;

(3) bearing improper selection;

(4) bearing or bearing cleaning not net, poor lubrication grease with sundry;

(5) the shaft current.

Use:

(1) improper installation, such as the motor shaft and the drive device of the shaft alignment of undesirable;

(2) pulley pulled too tight;

(3) bearing bad maintenance, insufficient or grease, could more than dry deterioration.

11. What are the cause of low insulation resistance motor?

(1) winding be affected with damp be affected with damp or water invasion;

(2) winding on accumulation of dust or oil;

(3) insulation aging;

(4) motor wire or wiring board insulation damage.