What is the difference between synchronous belt drive and chain drive? In the eyes of many people, it seems that there is not much difference, which is a wrong view. As long as we observe carefully, we can see the difference. Synchronous belt drive has more advantages than chain drive. The synchronous pulley has the characteristics of stable transmission, high transmission efficiency and good heat resistance. Now let’s take a detailed look.
Characteristics and application of synchronous belt drive
Synchronous belt drive is generally composed of driving wheel, driven wheel and belt tightly covered on two wheels.
Working principle: the use of intermediate flexible parts (belt), relying on friction (or mesh) in the main, driven shaft between the transmission of rotary motion and power.
Composition: synchronous belt (synchronous toothed belt) is made of steel wire as tensile body, wrapped with polyurethane or rubber.
Structural features: the cross section is rectangular, the belt surface has equidistant transverse teeth, and the synchronous belt wheel surface is also made into corresponding tooth shape.
Transmission characteristics: the transmission is realized by the meshing between the synchronous belt teeth and the synchronous belt teeth, and there is no relative sliding between them, so the circular speed is synchronized, so it is called synchronous belt transmission.
Advantages: 1. Constant transmission ratio; 2. Compact structure; 3. Because the belt is thin and light, high tensile strength, so the belt speed can reach 40 MGS, transmission ratio can reach 10, and transmission power can reach 200 kW; 4. High efficiency, up to 0.98.
Characteristics and application of chain drive
Composition: chain wheel, ring chain
Function: the meshing between chain and sprocket teeth depends on the same direction transmission between parallel shafts.
Features: compared with belt drive
1. The sprocket drive has no elastic sliding and slipping, and can keep accurate average transmission ratio;
2. The required tension is small and the pressure acting on the shaft is small, which can reduce the friction loss of the bearing;
3. Compact structure;
4. Can work in high temperature, oil pollution and other harsh environment; compared with the transmission gear
5. The manufacturing and installation accuracy is low, and the transmission structure is simple when the center distance is large;
Disadvantages: the instantaneous speed and the instantaneous transmission ratio are not constant, the transmission stability is poor, there is a certain impact and noise.
Application: widely used in mining machinery, agricultural machinery, petroleum machinery, machine tools and motorcycles.
Working range: transmission ratio: I ≤ 8; center distance: a ≤ 5 ~ 6 m; transmission power: P ≤ 100 kW; circular speed: V ≤ 15 m / S; transmission efficiency: η≈ 0.95 ~ 0.98
Post time: Jul-06-2021