Design of Weight Cart for Elevator Balance Coefficient Test

The rated load capacity, counterweight and no-load car weight of the elevator are the technical basis for calculating the balance coefficient. The balance coefficient of the elevator is obtained by dividing the difference between the total weight of the counterweight device and the no-load car by the rated load capacity of the elevator. According to the requirements of GB7588-2003, the balance coefficient of traction driven elevator shall be in the range of 0.4-0.5. After the installation of the elevator, the balance coefficient will be tested. The current inspection specification TSG T7001-2009 stipulates that the balance coefficient test method is mainly through the current load curve method. This method needs to carry the weight repeatedly, measure the change of motor current, and obtain the specific value of balance coefficient by fitting the current and load curve. However, this method has high labor intensity and long operation time, requires frequent handling of weights and high labor intensity for operators. Therefore, in this paper, a weight cart for elevator balance coefficient test is designed, which can solve the technical problem of moving weights frequently.