Traction system for goods elevator

Abstract

The invention discloses a traction system for a goods elevator. The traction system comprises a tractor, a traction steel wire rope and a counterweight, and is characterized in that the counterweight includes a support block and multiple counterweight blocks stacked on the support block in the vertical direction in sequence; the diameters of all the counterweight blocks are reduced in sequence from top to bottom; multiple support plates are arranged in a hoistway in the vertical direction at intervals; through holes are respectively formed in all the support plates opposite to the axis of the counterweight; an annular groove is formed in the outer peripheral wall of a guide wheel; at least three clamping grooves internally tangent in the radial direction of the guide wheel are formed in the groove bottom of the annular groove; clamping blocks are arranged in the clamping grooves; and the traction steel wire rope is butted against or deviated from the upper end surfaces of the clamping blocks along with rotation of the guide wheel. According to the traction system for the goods elevator, in the car lifting process, the weight difference between a car and the counterweight is small, so that the traction power output by the tractor is low, the energy consumption is low, and the lifting time consumption is low.

Description

Technical field [0001] The invention relates to the technical field of elevators, in particular to a traction system for freight elevators. Background technique [0002] The lifting process of the elevator is to wind the driving wheel of the traction machine, the guide wheel of the car, and the counterweight wheel of the counterweight by the traction wire rope in order, so as to drive the car by the friction between the driving wheel and the traction wire rope. Lift. For elevators that are only used to carry goods, they are called freight elevators hereinafter, which often adopt a uniform speed lifting method, that is, the freight elevator maintains a uniform speed during the traveling process. Although this kind of freight elevator has good stability, its load is heavy during the ascent of the freight elevator, which leads to a large weight difference between the freight elevator and the counterweight. The traction machine needs to provide greater traction power. At the same ti...

AI Technical Summary

Problems solved by technology

Although this type of freight elevator has good stability, it has a heavy load during the ascending process of the freight elevator, resulting in a large weight difference between the freight elevator and the counterweight, which requires the traction machine to provide greater traction power. At the same time, during the descending process, The weight of the empty car is light, and the counterweight used in the freight elevator is to meet the larger load capacity, so there is also a large weight difference between the empty car and the heavier counterweight, which will also cause dragging. The traction load of the traction machine becomes larger. Therefore, the traction machine of the existing freight elevator generates high energy consumption regardless of the lifting and lowering, and the lifting takes a long time. It is not suitable for freight elevators that require fast handling or heavy loads.

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