How to adjust the comfort of an elevator?

In terms of mechanical structure

① The gap at the main rail joint and the size of the steps exceed the tolerance. According to GB7588 and GB10060, the gap at the rail joint with safety clamps shall not exceed 0.5mm, and the gap at the steps shall not exceed 0.05mm. When the gap at the rail joint of the car and the steps increase, the elevator operation will experience intermittent vibration in the horizontal direction, affecting the comfort of the ride. The solution is to minimize the gap between the car guide rail joints and the size of the steps as much as possible, the smaller the better.

② The gap between the shoe lining and the guide rail is too large. The solution is to minimize the gap between the sliding guide shoe lining and the guide rail as much as possible or increase the pressure of the rolling guide shoe spring within a certain range, thereby reducing the horizontal vibration. And regularly check the wear of the boot lining and rollers, and replace them if necessary.

③ The verticality of the working surface of the guide rail exceeds the tolerance

According to the requirements stipulated in GB7588 and GB10060, for the guide rails equipped with safety clamps, the sag every 5 meters shall not exceed 1.2mm, and the sag on the entire set of guide rails shall not exceed 1mm. This can ensure that the vibration of the guide shoes along the guide rails is reduced to the minimum without affecting operation.

④ The guide rail support and guide shoe frame are loose.

When the fixing bolts of the guide rail support or the guide shoe frame of the elevator compensation chain are partially loose, it will cause the gap between the shoe lining and the guide rail to increase, thereby increasing the vibration of the elevator. In severe cases, it may cause the guide shoe to run off the guide rail, posing a danger to the elevator. The solution is to regularly check the tightness of the bolts in each part, ensuring that the bolts have a certain preload and take relaxation measures.

⑤ The tension of the steel wire rope is severely uneven

The solution is to adjust the tension of the steel wire rope on the one hand to make it tend to balance, so as to meet the requirement stipulated in GB7588 that the deviation between the tension of the steel wire rope and the average value is less than 5%.

⑥ The wear of the turbine and worm in the reducer is too large, and the meshing clearance of the turbine and worm is too large, causing impact. The solution is to replace the turbine and worm.

⑦ When installing the traction machine, there were no shock-absorbing rubber pads for the base feet, or the rubber pads were aged

The solution is to inspect and replace the aged and damaged vibration damping rubber pads.

⑧ Compensation chain (rope

The twisting of some links generates impact vibrations, which are transmitted to the car.

The solution is to reset the compensation chain (rope) so that it is in a free state, without any twisting of the chain links and freely drooping, and then re-fix both ends.

⑨ Incorrect balance coefficient and weighing system failure

When the balance coefficient is too large or too small, the elevator will shake up and down at the moment of starting or stopping (improper adjustment of the brake can also cause shaking). The principle of the elevator weighing system is that the control system provides an appropriate preset torque to the elevator at the moment of startup based on the actual load of the car, ensuring a smooth start of the elevator. However, if the weighing system cannot accurately reflect the load of the car, obvious shaking will occur during startup.

The solution is to adjust the balance coefficient and regularly calibrate the weighing system to ensure it accurately reflects the weight of the car.

2. Electrical control aspect

The speed and acceleration curves of the elevator were measured using the EVA625 elevator comprehensive performance analyzer, and the acceleration and deceleration slopes at the speed change inflection points were adjusted.