时间：2014-06-23 20:05　作者：admin　点击： 次

Roller chain coupling is a coupling that uses a common roller chain (single row or double row) to mesh with two parallel sprockets with the same number of teeth at the same time to realize the coupling of the two halves of the coupling. Its characteristics are: The structure is simple, easy to load and unload. i The radial dimension is compact than other couplings, the weight is lighter, the moment of inertia is small, the efficiency is high, and it has a certain displacement compensation capability (radial displacement is 0p for double rows and 02p for single rows ,Angular displacement<0, p——chain pitch), reliable work, long service life (up to 1 1h), can be used in harsh working environments (such as high temperature, humidity, dust, oil, etc.), and low cost.The disadvantages are: excessive centrifugal force will accelerate the wear and heat generation between the components, and it is not suitable for high-speed transmission; the buffering and vibration absorption capacity is not large, and it is not suitable to work under frequent starting and strong impact; it cannot transmit axial force.
The material of semi-coupling is commonly used 45, 20Cr steel, and ZG270-500 cast steel can also be used.The hardness of the chain teeth is preferably 40HRC-45HRC.The coupling should have a cover and be made of aluminum alloy.When a single-row chain is used, the roller and sleeve are stressed, and the pin only serves as a connection, and the structure is reliable; when a double-row chain is used, the pin is subjected to shear force and has poor impact resistance, and the pin and the outer chain plate The interference fit between them is easy to loosen.In high-speed and light-load situations, chains with a smaller chain pitch should be used, which are light in weight and small in centrifugal force; in low-speed and heavy-load situations, chains with a larger chain pitch should be used to increase the load-bearing area.The number of sprocket teeth is generally 12-22.In order to avoid transitional links, an even number should be used.