Chain performance parameters of the measuring device

Chain blocks the development of the performance parameters of the measuring device when the mechanical lifting transportation machinery research institute, Beijing chainb lock sound Gu Yuan Yuan Fang hand chain hoist is a kind of enormous quantity wide manual lifting equipment. When chain ascension rated load, hand in hand on the zipper to exert certain pulling force, the force will show that the size of the chain of the machine efficiency. We developed measuring device is used to measure the hand pull in the chain, the machine efficiency and continuous motion test and development. 1. The measurement problems in the past, before hand to pull the heavy lead method is used to measure, namely to hang up the chain to be tested in the product test rig, equal to the rated lifting weight of load test on the hoist hook, and increase the height of 300 mm. Measurement will hand chain blocks a chain of fixed down side chain, on the hand chain of hoisting side plus the first measured rated hand gourd tension value of Jordan farmar (farmar location close to the measured gourd) as far as possible, at the same time combined with equal to the rated hand pull of 50% of the value of the additional weight. When you disengage the down side of the hand chain, observe side hand lifting chain on weight reduction, such as Jordan farmar in the midway stop or accelerated decline, should be appropriate to increase or decrease the rated hand pulling force value of Jordan hoist equipment, at a uniform rate until farmar can drop 200 mm effective stroke, is the weight of the weight is the hand to pull the measured value.