Principle analysis of industrial belt transmission method 1

We will encounter the use of some industrial belts at work. Sometimes various problems will occur during use, such as: belt breakage, belt slack, the machine is not running, etc. Today I will explain to you the principle analysis of friction in the belt transmission process.
In industrial belt transmission, if the friction between the conveyor belt and the wheels is reduced, the conveyor belt will easily slip on the wheels, causing the machine to be unable to operate normally. In this case, the conveyor belt has been used for a long time and has become loose. We The belt can be tightened, which increases the pressure of the belt on the wheels, which then increases the friction between the belt and the wheels. Next we discuss the belt's drive pulley's counterclockwise rotation transmission method. Let's start by analyzing the friction and see what the effect is.
The drive pulley rotates counterclockwise. Since the conveyor belt does not slip during the transmission process, the friction between the conveyor belt and the pulley is static friction, and the direction of static friction is opposite to the movement trend of the conveyor belt relative to the pulley. The "relative movement trend direction" at this time refers to the movement direction of the belt relative to the pulley when there is no friction between the belt and the pulley. It is now known that the drive pulley rotates counterclockwise, so the relative motion of the belt relative to the pulley tends to be clockwise. Therefore, it can be concluded that the direction of the static friction force acting on the belt from the drive pulley is counterclockwise. Under the action of static friction, the belt rotates counterclockwise. For the driven pulley on the right, the direction of static friction acting on the belt is clockwise. Under the action of static friction between the two pulleys, the belt above the pulley is tightened and the belt below the pulley is relaxed, so the winding angle of the belt around each pulley is less than π.