Method for measuring braking glide quantity of electric hoist

Abstract

The invention relates to a method for measuring the brake glide quantity of an electric hoist. The method comprises the steps: S1, under the conditions of rated voltage, rated frequency and rated load, the electric hoist adopts a steel wire rope, the steel wire rope is matched with the electric hoist for installation, a marking pen is manually used for marking on the steel wire rope, and a scale is fixed beside the steel wire rope at a short distance; S2, the electric hoist is started (under the conditions of rated voltage, rated frequency and rated load), eyes look at the scale horizontally,a stop button of the electric hoist is pressed down at the moment when the mark on the steel wire rope passes through the scale, and at the moment, the marking pen is used for marking the position, corresponding to the scale, of the steel wire rope; S3, the distance L' between the two marks is measured by using a measuring tool, and the distance L' is divided by the multiplying power n of the steel wire rope of the electric hoist to obtain a numerical value which is the brake glide quantity L; and S4, repeating the step S1-step S3 for three times, and taking the average value of the three times of measurement data to obtain a measurement result. The method has the beneficial effects that the operation is convenient, and the measurement error is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of factory test of an electric hoist, in particular to a method for measuring the braking sliding amount of an electric hoist. Background technique [0002] Existing measurement method: Under the conditions of rated voltage, rated frequency and rated load, a steel wire rope with a diameter of 1mm is used. Connected to the descending circuit controlled by the contactor, the quality of the mound should be enough to make the switch operate and cut off the descending circuit. When measuring, the small mound is placed on the load. When the load drops to a certain position at the rated speed, the small mound is separated from the load. At this time, the descending circuit is cut off immediately, and the load starts to slide down immediately. The measured distance between the small mound and the load The vertical distance, that is, the sliding amount, is measured three times in a row, and the average value is take...

AI Technical Summary

Problems solved by technology

[0003] Defects of the existing technical solutions: when measuring according to the above method, it is very cumbersome and inefficient to measure the amount of brake slippage in actual operation, and it is not safe to a certain extent

Furthermore, when directly measuring the heavy object, there will be a large deviation between the measured data and the actual data due to the vibration of the heavy object during operation and the shape of the heavy object.

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