1. Balance coefficient is an important performance index of traction-driven elevator. The car and counterweight of traction elevator are suspended on both sides of the traction wheel by wire rope. The counterweight can partially balance the weight of the car and the load inside the car, so that the operating load of the traction motor can be reduced. The ideal operating condition is that the weight of counterweight is exactly equal to the weight of the car plus the weight of the load inside the car. In this way, the operating load of the motor is minimized. However, since the size of the load in the car changes at any time, and each operation is a certain value between no load and full load, and the counterweight is not easy to change at any time after the commissioning of the elevator is completed, so the above ideal balanced operation state can not be satisfied every time. However, we can adjust the counterweight to an appropriate weight, so that the situation of multiple runs on a point day is basically close to the ideal equilibrium state. The calculation formula is: W=P+KQ. where K=balance coefficient, W=weight of counterweight, Q=elevator rated load, P=car self-weight. The national standard stipulates that the balance coefficient of all kinds of elevators should be between 0.4 and 0.5.
2. The actual balance coefficient can be decided according to the specific conditions of the elevator during commissioning. The general measurement method is to draw the upward and downward running current curves of the elevator and determine the balance coefficient by the intersection point of the two curves.
Post time: Jan-03-2023
