Rihmaratas ajam eelised

The advantages of pulley drive are: pulley drive can ease the load impact; Pulley drive running smoothly, low noise, low vibration; Pulley drive structure is simple, easy to adjust; Pulley drive The manufacturing and installation accuracy of the pulley is not as strict as the mesh drive; The pulley drive has the function of overload protection; The adjustment range of the center distance between the two axes of the pulley drive is large. The disadvantages of belt drive are: the pulley drive has elastic sliding and slipping, the transmission efficiency is low and the accurate transmission ratio cannot be maintained; When the belt drive transmits the same large circumferential force, the contour size and the pressure on the shaft are larger than that of the meshing drive. The life of the pulley drive belt is short. The diameter and size of the belt pulley of all kinds of mechanical equipment are their own according to the deceleration ratio, and they are designed according to the working speed and the motor speed. Working speed/motor speed {{0}} driving wheel diameter/driven wheel diameter *0.98(sliding coefficient), such as the use of steel pulley, the line speed is required to be no higher than 40m/s, such as the use of cast iron materials, the line speed is required to be no higher than 35m/s, the motor speed and pulley diameter conversion ratio, Speed ratio=output speed: Input speed=load pulley pitch circle diameter: motor pulley pitch circle diameter. The pitch circle diameter and the base diameter are the same, diameter -2h= pitch circle diameter, h is the groove depth on the base line, different types of V-belt h is different, Y, Z, A, B, C, D E, the groove depth on the base line is h=1.6 2 2.75 3.5 4.8 8.1 9.6. The pitch circle diameter of the pulley is the theoretical diameter of the pitch line position of the pulley, which is a bit like the indexing circle diameter of the gear. It is generally represented by PD, and the outer circle is generally represented by OD. The conversion formula of different groove pitch circles and outer circles is not the same, generally we are easier to measure the outer circle of the pulley, and calculate the pitch circle according to the formula. SPZ:OD=PD plus 4; SPA: OD=PD plus 5.5; SPB:OD=PD plus 7; SPC:OD=PD plus 9.6. The minimum outer diameter of A or SPA pulley is 80mm, such as less than this size, especially in the case of high speed, the belt is prone to delamination and cracks at the bottom. SPZ belt, small wheel is not less than 63mm. At the same time, pay attention to the belt installation and tension, too small easy to slip, too large easy to damage the belt and bearing.