What are the reasons for the bending of elevator guide rails?

Analysis of bending of elevator guide rail

There are generally several possibilities when the track is bent like this;

1. The distance between the top guide rail and the floor slab of the machine room is too small (5~10cm spacing is best reserved for general installation), and the guide rail is bent due to continuous thermal expansion due to the high ambient temperature;

2. The distance between the brackets of the fixed guide rail is too large (the national standard is less than or equal to 2.5m, which exceeds the manufacturer’s design and calculation basis). The brackets should be installed according to the manufacturer’s design value (most manufacturers’ bracket spacing is generally 2m, and some installers save labor. Install continuously and evenly into a distance of 2.49~2.5m, which is actually an error of An Chang) The guide rail is easy to bend;

3. When installing guide rails in the case of high floors, one should be installed from the bottom to the top, after one is completed, adjusted and fixed, and one is installed upwards. (For elevators above 15 floors, it is better to pad a thin copper sheet at the joint). After the top is put on the pressure plate and then adjusted, the lower the track is, the more the upper track is subjected to the weight of the upper track, the stress in the track is very large, and the easier it is to cause bending in summer;

4. The bottom pit should have a guide rail seat cushion. The standard guide rail seat cushion installation is in contact with the pit ground. The guide rail and the bottom of the seat cushion should be 3~5cm empty. The guide rail and the seat cushion should be connected by a pressure guide plate. It is forbidden to use the connecting hole on the guide rail head. The bolts are connected to the seat cushion, and it is not allowed to weld the guide rail and the seat cushion;

Brothers in the elevator industry, we are not professional architects. We cannot arbitrarily say that the settlement of the building caused such an arbitrary conclusion. It should be based on facts, because any completed building will settle. A building with reasonable design and construction , The settlement is holistic, not partial. Is it possible that the entire house will experience settlement of the engine room and floors, but the pit will not settle? Or is it that the built building assumes that each floor is 3 meters high, and after a while, each floor will shrink to 2.99 meters? This is nonsense at all.

Analysis 2:

1. The settlement of a building is the settlement of the entire foundation, how can it be only the settlement of the shaft?

2. Generally, for elevators with a lifting height of 60 meters, manufacturers will design the pressure guide plate to be flexible, and there will be copper wrappers at the bracket of the guide rail. This is to prevent the guide rail from expanding and contracting during climate change. phenomenon.

3. In this case, it is likely that the distance between the brackets is too large.

4. The screws at the connection of the guide plate are loose, and the kinetic energy generated when the elevator is running at high speed cannot withstand the connection.

5. There are serious wear and tear of the guide shoes, and the outer side of the lining is wrapped with iron. After the lining is worn, the impact occurs.

6. The possibility of the safety gear brake is unlikely, because the elevator did not stop on the corresponding floor, if it was caused by the brake, it can only be said that fortunately no casualties were caused. It is certain that the safety gear switch is not working properly!

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