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How To Ensure The Comfort Of High-speed Passenger Elevators And Reduce Noise?
- Apr 24, 2018 -

The comfort and riding experience of passenger elevators in operation is very important. The first is the rationality of structural design, such as the degree of rigidity and strength of the safety part, which ensures the reliability of the use of safety components; the weight of the car's own weight design guarantees the stability of the elevator; the gantry beam meets the conditions of tensile strength, it must have certain elasticity. In short, there must be rigidity and elasticity between the guide rail bracket and the gantry beam of the car. The purpose is to reduce the curvature of the contact surface caused by the straightness of the guide rail during installation, rely on the guide shoe, rubber cushion, straight beam, Guide rails, control systems and other reasonable structural measures ensure the comfort of the elevator during operation and reduce noise.

       The noise generated by the traction machine is related to the size of the optional power. Current, bearing, and rope geometry of the traction sheave are all causes of noise, ie, noise sources, because the object will have friction during movement, friction will reduce the practical power, and motor noise will increase when the power is reduced. However, the friction between the wire rope and the traction sheave groove is a contradiction between the advantages and disadvantages. The following is a comparison of a 1:1 traction sheave groove and a 2:1 traction sheave groove.

The 1:1 rope groove adopts a V-shaped groove, and the wire rope is subjected to heavy pressure in the V-shaped groove and the friction force increases. At the same time, the deformation of the steel wire rope also increases. When the rope is out of the groove, there will be jitter, and at the same time the jitter will be transmitted to the car through the wire rope. Even if the rubber block solves it, it can only solve the sound problem and cannot solve the problem of jitter. The idea to solve this problem is to change the geometry of the traction sheave groove R semi-circular arc and guide wheel rope groove, through the rewind between the two wheels to increase the friction to lift the car and the counterweight, but the slot and groove spacing Not too large, R groove surface roughness to be 0.8, because the traction wheel and the guide wheel misaligned by a slot distance, the steel rope in the slot when entering and exiting a little, which requires a high degree of R groove finish, the wire rope in and out of the slot When smooth in and out, so that the rope no jitter, but this time the tension between the traction wheel and the guide wheel is 10 times the weight of the car from the weight of the two rounds of the wrap angle and friction force at the same time, R rope groove geometry It has minimal impact on the deformation of the steel wire rope and plays a good role in protection. The noise and jitter problems have greatly improved.

In the era of worm and worm hoist used in elevators, the car noise is several times that of the permanent magnet synchronous frequency conversion traction machine. This is because of machining accuracy and assembly error, which causes the worm and the worm to generate friction when they rotate. Pass to the car. The car walls are made of thin steel plates, so it is easy to conduct and amplify the noise. In addition, nowadays car mountings are often attached to the car walls with adhesive, and the adhesive between the new mounting material and the steel plate is both an adhesive layer and a noise reduction layer. The car decoration also added the weight of the car. Some companies put marble on the car bottom. The weight of the car floor in the up and down operation will increase, swinging will naturally decrease, comfort will be greatly improved, and noise will be greatly reduced.

Each elevator product is the same after it is manufactured and delivered, but it is different after installation by different installation teams. Among them, the installation of guide rails is closely related to the swing of the car when an elevator is in operation. The elevator guide rail has three contact surfaces matched with the shoe lining surface. During the running, it slides. At the same time, there are two guide shoes on the car top and two guide shoes on the car bottom. If the contact surface passes through the curved guide rail, the straightness of the gantry straight beam is too hard to eliminate. With elastic deformation, the car swings as the guide rail bends. If the car is self-gravity, the swing will be reduced when it is twisted. This is the dynamic point of view of the object in operation.

The high-speed elevator car is also a main cause of car noise due to air pressure resistance and car body friction during well operation. The author's research and design is to design the appearance of the car, including the car top and the car bottom, into a tapered structure. The external design is very smooth and streamlined. The car with steps is not used to reduce air resistance. In addition, there must be a certain area of the ventilation window on the top of the hoistway to reduce the wind pressure resistance of the hoistway during high-speed operation. This design has obvious effects on reducing noise and improving ride comfort.

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