Belt pulley production requirements and belt specifications
Production requirements
Belt pulley material and production requirements
1. The material of the fan used for the wheel is gray cast iron HT200, HT250, etc. (but steel, copper, aluminum, etc. can also be used according to customer needs).
2. The pulley should meet: light weight, uniform mass distribution, eliminate internal stress generated in manufacturing, and the pulley should be corrected for static balance.
Belt specifications
The specifications of the triangle belt are divided by the size of the back width (top width) and height (thickness). According to the different back width (top width) and height (thickness), the national standard specifies the O and A of the triangle belt , B, C, D, E and other models, each type of V-belt has different section width, top width, and height, so the pulley must also produce various grooves according to the shape of the V-belt; these are different The groove type determines the O-type pulley, A-type pulley, B-type pulley, C-type pulley, D-type pulley, E-type pulley and other types of pulleys.
Belt model
The models of V-belt are: ordinary OABCDE 3V 5V 8V, ordinary reinforced AX BX CX DX EX 3VX 5VX 8VX, narrow V-belt SPZ SPA SPB SPC, strong narrow V-belt XPA XPB XPC; each model of V-belt specifies a triangle The cross-sectional size of the belt, the cross-sectional size of the A-type triangle belt is: the top width 13mm, the thickness is 8mm; the cross-sectional size of the B-type triangle belt is: the top width 17MM, the thickness is 10.5MM; The width is 22MM and the thickness is 13.5MM; the cross-sectional size of the D-shaped triangle belt is: the top width is 21.5MM, and the thickness is 19MM; the cross-sectional size of the E-shaped triangle belt is: the top width is 38MM, and the thickness is 25.5MM. Corresponding size (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 national standard stipulates that there are seven types of triangle belt models: O, A, B, C, D, E, and F. The corresponding pulley wheel groove angles are three kinds: 34 °, 36 °, and 38 °, and each type of triangle is specified. The minimum diameter of the small pulley corresponding to each type of groove angle is not specified for the large pulley. The groove angle of the pulley is divided into 32 degrees, 34 degrees, 36 degrees and 38 degrees. The specific choice depends on the groove type and the reference diameter of the pulley; the groove angle of the pulley is related to the diameter of the pulley, and the groove angle of different types of pulleys is different. The recommended number of pulley groove angles in the diameter range is as follows: O-type pulley is 34 degrees when the pulley diameter range is 50mm ~ 71mm; 36 degrees is between 71mm ~ 90mm, and 38 degrees is> 90mm; A-type pulley is on the pulley Diameter range is 34 degrees at 71mm ~ 100mm, 36 degrees at 100mm ~ 125mm; 38 degrees at> 125mm; B-type pulleys at 34 degrees when the pulley diameter range is 125mm ~ 160mm; 36 degrees at 160mm ~ 200mm ,> 200mm is 38 degrees; C-type pulley is 34 degrees when the pulley diameter range is 200mm ~ 250mm, 36 degrees is when 250mm ~ 315mm, 38 degrees is> 315mm; D type pulley is 355mm when the pulley diameter range 36 degrees at ~ 450mm, 38 degrees at> 450mm; 36 degrees at E-type 500mm ~ 630mm, 38 degrees at> 630mm.
