Chain Drive Compared With Belt Drive
The chain drive has no elastic sliding and slippage, and can maintain an accurate average transmission ratio; the required tension is small, and the pressure acting on the shaft is also small, which can reduce the friction loss of the bearing; the structure is compact; it can work at higher temperatures and oil stains. Work under harsh environmental conditions. Compared with gear transmission, chain transmission requires lower manufacturing and installation accuracy; when the center distance is large, its transmission structure is simple. The instantaneous chain speed and instantaneous transmission ratio are not constant, so the smoothness of the transmission is poor, and there are certain shocks and noises in the work. The average transmission ratio of the chain drive is accurate, the transmission efficiency is high, the distance between the shafts is large, and it can be used in the environment with high temperature and high humidity; but the chain drive can only be used as a transmission between parallel shafts, and its instant transmission Compared with fluctuations, the transmission noise is relatively large. Because the chain links are rigid, there is a polygonal effect (that is, uneven motion). This kind of motion characteristics changes the instantaneous transmission ratio of the chain drive and causes additional dynamic loads and vibrations. This must be considered when selecting chain drive parameters. Chain drives are widely used in transportation, agriculture, light industry, mining, petrochemical and machine tool industries.
Chain drive has many advantages. Compared with belt drive, there is no elastic sliding and slipping phenomenon, the average transmission ratio is accurate, the work is reliable, and the efficiency is high; the transmission power is large, the overload capacity is strong, and the transmission size under the same working condition is small; The tight force is small, and the pressure acting on the shaft is small; it can work in harsh environments such as high temperature, humidity, dust, and pollution.
The main shortcoming of chain transmission are: it can only be used for transmission between two parallel shafts; high cost, easy to wear, easy to extend, poor transmission stability, additional dynamic load, vibration, impact and noise during operation, and it is not suitable for use in rapid speed. Reverse transmission.
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