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Question:

Does the speed limiter of the elevator protect the elevator from speeding up?

Does the speed limiter of the elevator protect the elevator from speeding up?

Answer:

The forward overspeed protection device used on the car is usually a two-way speed limiter, an upstream safety clamp, and a two-way safety clamp which is combined with a down safety clamp.
The car overspeed protection device is to protect the car from speeding up. The most direct way is to let the speed reduction element act directly on the car. Therefore, this kind of upstream overspeed protection using the bidirectional speed limiter uplink safety clamp is considered the most reliable and the most ideal scheme. This type of structure is relatively simple in structure and has little effect on the original structure. It will not occupy the well space and will not affect the layout of the well. Moreover, the structure of the speed limiter safety linkage is mature and reliable. This structure is used more in the high speed elevator. From the product cost point of view, this type needs to increase the upstream safety tongs and use the two-way speed limiter, and accordingly increase the partial cost.
The overspeed protection device for the car on the steel rope is mainly controlled by the speed limiter and rope clamp structure. This is a speed limiter as speed control components, with rope gripper as deceleration protection system components, in the elevator overspeed drives when speeding up the rope gripper, clamping wire rope braking, which requires the rope gripper is fixed and reliable. The utility model has the advantages that the installation is simple, and the layout of the hoistway is not influenced, especially for the old ladder transformation, and the realization of the overspeed up protection of the car is more operable.
The utility model relates to a speed overspeed protection device for a heavy car, and adopts an ordinary speed limiter safety clamp structure, that is, a speed limiter safety clamp system is added to the heavy side.This type is a relatively intuitive way to prevent the car from speeding up to the top of the car by preventing heavy, downlink and overspeed. Due to the addition of a speed limiter safety clamp system to the heavy side, the layout of the hoistway is complicated as the structure of the heavy truck is changed greatly, and the whole elevator system is equipped with two sets of speed limiter safety tongs system. The use of the heavy duty safety tongs makes it impossible to use the hollow rail for the heavy side rails. Therefore, the overspeed protection of the car in this way is of high cost. But this configuration advantage is easy to match parts do not need to develop new products, components, especially for the kind of "on someone can reach under heavy space" and not "will be installed on the counterweight buffer has been extended to solid ground solid pile pier on the elevator, must be installed on the heavy safety clamp, this can put the ascending car overspeed protection device and the safety clamp to be made one reduce the extra cost.

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