The nominal size of various leather belt wheels
If use steel for the material of the pulley, asking the linear velocity is not higher than 40 m/s, such as the use of cast iron material, require linear velocity is not higher than 35 m/s, motor speed and pulley diameter conversion ratio, speed ratio = output rotational speed, input speed = load pulley pitch diameter, pitch circle diameter of the motor pulley. Pitch diameter and benchmark is the same diameter, diameter - 2 h = pitch diameter, h is on the line groove depth, different models of V belt h is not the same, A B C D E, Y, Z line groove depth respectively in 2 h = 1.6 1.6 3.5 4.8 8.1 2.75. Pulley pitch diameter is pulley diameter section line theory, a bit like gear pitch circle diameter. Generally expressed in PD, cylindrical generally expressed in OD. Different type slot pitch circle and cylindrical conversion formula is different, generally we tend to measure to the pulley cylindrical, in according to the formula to calculate the pitch circle. SPZ: OD = PD + 4; SPA: OD = PD + 5.5; .spb: OD = PD + 7; SPC: OD = PD + 9.6. The minimum diameter of A or SPA is 80mm, if less than that
The type of the triangle is: the common type O A, B, C, D, E, 3V, 8V, the ordinary plus strong type AX BX CX DX EX 3VX 5VX 8VX, narrow V SPZ SPA SPB SPC, and the narrow V band XPA XPB XPC. Each model of the triangle has the section size of the triangle belt, the section size of A type A triangle is: the top width is 13mm, the thickness is 8mm. The section size of type B triangle is: the top width is 17MM, the thickness is 10.5 MM. The section size of C type triangle is: the top width is 22MM, the thickness is 13.5 MM. The section size of the D type triangle is: the top width is 21.5 MM, the thickness is 19MM. The section size of E type triangle is: the top width 38MM, the thickness is 25.5 MM. Dimensions (width * height) : O (10 * 6), A (12.5 * 9), B (16.5 * 11), C (22 * 14), D (21.5 * 19), E (38 * 25.5).
The best answer Belt drive mainly include: flat belts, v-belts, synchronous toothed belt three, three belts have national standards, but the pulley due to the change of the transmission ratio, power is larger, not corresponding national standards or national standards cannot cover all the content, but the national standard to determine the selection scope, conditions of use, design method, etc.
