1. Concept and working principle of synchronous wheel
Synchronous wheel is generally made of 45# steel, aluminum alloy, copper, nylon and other materials. It is widely used in new mechanical belt transmission in various industries such as automation equipment, machine tools, textiles, printing, food packaging, wires and cables, instruments and meters, petrochemicals, tobacco, and communications. The synchronous wheel transmission consists of an annular belt with equally spaced teeth on the inner surface and a pulley with corresponding teeth. When running, the belt teeth and the tooth grooves of the pulley mesh to transmit motion and power. It is a new belt transmission that combines the advantages of belt drive, chain drive, and gear drive.
2. Calculation formula of synchronous wheel
1. Calculation: Dp=p×Z/∏ Dp: Pitch diameter Z: Number of teeth ∏: Pi
2. Calculation of actual outer diameter of synchronous pulley: De= Dp-2δDp: Pitch diameter δ: Pitch top distance
3. Calculation of synchronous pulley center distance and synchronous belt pitch line length: L: Approximate belt pitch line length C: Center distance between two axes Dp: Pitch diameter of large pulley dp: Pitch diameter of small pulley
4. Determination of center distance B= L– 1.57 (Dp + dp) L: Belt pitch line length
3. Specifications of synchronous wheel
① Imperial trapezoidal teeth MXL XL L H XH XXH② Metric trapezoidal teeth T2.5 T5 T10 T20 AT5 AT10 AT20③ Arc teeth: HTD (3M 5M 8M 14M 20M) STD/STS (S2M S3M S4.5M S5M S8M S14M)RPP3M RPP5M RPP8M RPP14M3GT 5GT 8GT 14GT
IV. Transmission characteristics of synchronous wheels
(1) Accurate transmission, no slip during operation, and constant transmission ratio;
(2) Smooth transmission, with buffering and vibration reduction capabilities, and low noise;
(3) High transmission efficiency, up to 0.98, with obvious energy-saving effect;
(4) Convenient maintenance, no lubrication required, and low maintenance cost;
(5) Large speed ratio range, generally up to 10, linear speed up to 50m/s, with a large power transmission range, from a few watts to hundreds of kilowatts;
(6) Can be used for long-distance transmission, with a center distance of more than 10m.
(7) No pollution, can work normally in places where pollution is not allowed and the working environment is relatively harsh
