Elevator Car Decoration Company Explains the Classification of Elevator Common Faults
1. Analysis of common faults in elevator mechanical systems
The failure of the elevator mechanical system accounts for a small proportion of all elevator failures, but in the event of a failure, it may cause long-term shutdown or electrical failure or even serious damage.
Equipment and personal accidents. Further reducing the failure of the elevator mechanical system is a goal that maintenance personnel strive to achieve.
1Because of poor lubrication or failure of the lubrication system, the parts of the transmission part will be burnt and hung, and the parts of the rolling or sliding parts will be damaged and forced to stop and repair.
2Because there is no daily inspection and maintenance, the wear and tear of the parts in the transmission, rolling and sliding parts of the parts are not checked in time, and the wear and tear of the parts are not properly repaired, resulting in damage to the parts. Forced to stop repairs.
3Because the vibration of the elevator during the running process causes the fastening bolts to loosen, the parts are displaced, the original precision is lost, and the repair cannot be repaired in time, causing the grinding, bumping and crashing parts to be stopped.
4 Because the elevator balance coefficient is too far from the standard, the overloaded elevator car is bottomed or topped. When the top is over, the speed limiter and the safety gear act to force the elevator to stop running and wait for repair.
2. Failure analysis of elevator electrical system
The absolute factor of elevator failure is the failure of the electrical control system. There are many reasons for the failure of the electrical control system. The main reason is the quality of the electrical components and the failure of maintenance.
Electrical system faults can be roughly divided into two categories:
1 Open circuit failure occurred in the electrical circuit. In the circuit, it is often found that the crimping screws of the incoming and outgoing wires of the electrical components are loose or the solder joints are weakly welded to cause an electrical circuit to be broken or poorly contacted. When the circuit is broken, it must be inspected and repaired immediately; if the contact is not good for a long time, the lead or lead wire will be pulled to burn the joint and the electrical components.
2 short circuit fault. When a short-circuit fault occurs in the circuit, the fuse is burnt, and the electrical components are burned, which may even cause a fire. Common mechanical and electrical contacts or relays
The interlock of the device may cause a short circuit due to contactor or relay rush. When the main contact of the contactor is turned on or off, the generated arc breaks the surrounding medium and short-circuits. Aging, failure, and moisture of electrical component insulation materials can also cause short circuits.