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Common product parameters of drive chain

2017-06-26
        Number of sprocket teeth
        In order to improve the chain drive movement stability and reduce the dynamic load, small number of teeth more for good. But a small number of teeth should not be too much, otherwise i will be great, so that the chain drive early jump tooth failure.
        After a period of time, the wear of the chain reduces the pin length, makes the sleeve and the roller thinner, and extends the pitch of the chain under the action of the tensile load F. When the chain pitch becomes longer, the chain moves around the sprocket, and the circle D moves toward the addendum.
        General chain section number is even, in order to avoid the use of transition joints. In order to wear uniform, improve the life, the number of teeth with the best link numbers coprime, if it can not guarantee that the public should also be coprime, factor as small as possible.
        Pitch of chain
        The greater the pitch of the chain, the higher the carrying capacity in theory. But as mentioned in the preceding section: the greater the pitch, the greater the dynamic load caused by the change of the chain speed and the impact of the chain link on the sprocket, but the chain carrying capacity and the life of the chain decrease. Therefore, we should design the selection of pitch chain as far as possible, the actual effect is better when the selected heavy pitch multiple chain often from single row chain than the one selected.
        Center distance and chain length
        The center distance of the chain drive is too small, and the angle of the small chain wheel is small, and the sprocket teeth engaged at the same time are less; if the center distance is too large, the chain is easy to shake. A  from the general Center (30 ~ 50) P, less than 80p away from the center of the largest.
        The length of a chain is expressed by the number of nodes of a chain. According to the formula of belt drive to get the length, the number of links to be calculated should be rounded to integer, preferably the even number. The formula for finding the center distance a can be obtained by using the upper formula:
         In order to facilitate the tension of the chain and the adjusting chain, the center distance should be designed as adjustable or should be tensioned.
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