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The elevator balance coefficient is one of the important characteristic parameters of the elevator. It is related to the running performance of the elevator and the output power (energy consumption) of the traction motor. It is also a mandatory item for the elevator acceptance inspection (supervision inspection). Article 8.3.1 of the Elevator Supervision and Inspection Regulations clearly stipulates that the elevator balance factor should be between 0.4 and 0.5.

However, in the actual use of the elevator, the balance coefficient of the elevator is often reduced for various reasons, and may even be lower than the allowable range of 0.4. Does this have any harm to the safe operation of the elevator, and how big is the damage? This paper analyzes the typical elevator accident cases that have occurred recently in this city, in order to inspire the importance of the elevator balance factor.

The elevator is driven by the friction between the traction wire and the drive wheel. The motor, the reduction gearbox and the brakes installed in the machine room form a tractor, and the traction machine drives the traction wheel to rotate, generating traction drive power. One end of the traction wire rope is connected to the car, and one end is connected with the counterweight device. The gravity of the car and the counterweight causes the traction wire rope to be pressed in the traction wheel groove. When the motor is driven, friction between the wire rope and the traction wheel groove is generated, and the wire rope is driven to make the wire rope The car and the counterweight move relative to each other.

In recent years, some hotels, hotels and other buildings have been increasingly developed in the direction of high-end multi-functionality. Some building facilities are also decorated with guest elevators during indoor decoration. Because the car change design affects the car weight, changing the car weight affects the change of the traction condition and the balance factor, and affects whether the safety clamp and the buffer capacity match. Therefore, after the elevator has passed the acceptance inspection by the special equipment inspection agency approved by the State Administration of Quality Supervision, the user must not decorate the car at will to change the weight of the car. Before the decoration of the car, the original manufacturing unit and quality technology must be used. The supervisory department reviews and agrees, and re-inspection after the transformation. At the same time, it should also verify whether the safety clamps, buffers, safety interlocks, etc. of the elevator are reliable and effective. The important detection parameters such as the balance coefficient must be re-measured, otherwise it will leave a safety hazard, which will cause an accident and give life to the people. Property caused significant damage.

In order to effectively prevent the occurrence of elevator accidents, it is necessary to strengthen the safety awareness of the equipment use unit and the maintenance unit, and implement the principle of “safety-based, pre-inspection and pre-repair, planned maintenance”, and sound and perfect elevator use. Management system, management should be in place, responsibility should be clear; strengthen the education and training of the use of personnel, strengthen security awareness behavior, to achieve certification, usually carry out maintenance and repair of the elevator, abnormal situation must be timely to the superior or quality supervision department Report in time to make early detection of hidden dangers and early elimination to avoid recurrence of similar accidents.