Elevator failure refers to the phenomenon that the elevator can't work normally or seriously affect the comfort of riding, or even cause personal injury or equipment accident due to abnormal mechanical parts of the elevator or components in the electrical control system.
Mechanical system failure
First, the mechanical system common failure phenomenon and the reason has the following several kinds
1. Due to poor lubrication or lubrication system failure, the rotating parts of components are seriously heated and worn or the axle is held, resulting in the destruction of parts in the rolling or sliding parts.
2, due to the frequent use of the elevator, some parts will wear out, aging, maintenance is not in place, not timely replacement or repair of worn parts, causing further damage, forcing the elevator to stop.
3, during the operation of the elevator due to vibration caused by some fastening screws loose or loose, so that some parts, especially moving parts work abnormal resulting in elevator damage.
4, due to the imbalance of the elevator balance coefficient, or serious overload caused by car shake or flat accuracy poor, the elevator speed out of control, and even the top or bottom, causing speed limiter-safety clamp linkage, elevator stop.
2. When the mechanical system of the elevator fails, the maintenance workers should understand the situation and phenomenon of the failure to the driver, administrator or passenger. If the elevator is still in operation, the driver/administrator can inching the elevator up and down, and the maintenance worker can analyze and judge the fault points by listening, touching and measuring.
3. After the fault occurs, disassemble, clean, inspect and measure carefully according to the requirements of the relevant technical specifications, determine the cause of the fault through inspection, and repair or replace according to the degree of wear and damage of the parts.
Iv. After repair or replacement, elevator parts shall be carefully checked and debugged before being put into operation before being delivered for use.
Common faults in electrical control system of special elevator for Villas in Hubei province
1. From the scope of elevator electrical faults, * Commonly caused by door crane system faults and poor contact of electrical components. The main reasons for the failure of door crane system and electrical components are the quality of components, the quality of installation and debugging, and the quality of maintenance.
2, from the nature of electrical faults, mainly short circuit and open circuit. Short circuit is for some reason, should not be connected to the circuit connected or connected after the circuit resistance is very small. Common reasons for elevator short circuit fault include mechanical and electronic interlocking failure of directional contactor or relay, which may cause short circuit due to grab action of contactor or relay. When the main contact of the contactor is connected or disconnected, the generated arc causes the dielectric of the surrounding electrical components to be broken down and short-circuit; Electrical components insulation material aging, failure, moisture caused by short circuit; The insulation damage of electrical components and the invasion of external materials cause short circuit. A circuit break is when, for some reason, the circuit that should be connected is disconnected. The main causes of circuit break are loose lead-in and lead-out wires of electrical components. In the loop as the connection point of welding welding or bad contact; The contact of the relay or contactor is arced
Burned; The contact surface is composed of oxide layer; When the reeds of the contact are connected or disconnected, the arc is heated. After cooling, the spring loses its elasticity, resulting in insufficient contact pressure of the contact. Bad contact due to jitter when the relay or contactor pulls or disconnects