JB cylinder operation process

Modern industrial development, the corresponding industrial technology has been rapid development. JB cylinder is rapidly applied to various fields of automation process, however, due to the medium air is compressed pneumatic system, the dynamic stiffness and damping of the gas system is very poor, so in the operation of pneumatic actuator movement is not stable, but the price is low pressure system always makes it have strong competitiveness, JB cylinder necessary operation process. JB cylinder in the crawling phenomenon is due to the friction force and static friction resistance and the thrust of cylinder, when the thrust to overcome the static friction force of cylinder to move forward, cylinder volume expansion and pressure drop, the thrust is less than the resistance, cylinder to stop movement; When the cylinder pressure recovery, he repeated thrust is greater than the static friction. Each crawl cycle can be divided into two stages: one is to store energy, one is to immediately release energy to the critical value. No matter to mm/s above the speed of the cylinder, or below the speed of mm/s, the piston and piston rod and cylinder frictional contact position, fixed piston. Gradually increase the left cavity, the pressure difference on both sides of the piston, when with the size of the force generated by the pressure difference increased, to overcome the static friction, in the process of piston began to move. After piston movement, the friction coefficient is less than the static friction coefficient and static friction decreases for dynamic friction. Due to the growth rate of left ventricular volume, and gas is in short supply, resulting in a decline in left ventricular pressure and the right side of the combustion chamber pressure increase gradually, when the combustion chamber pressure and the piston and piston rod position on both sides of the friction force is equal to the size of the oil cylinder piston stop accelerating. Due to inertia effect, the piston is still walking distance, with falling pressure in the left side of the cavity, when the chamber of piston and piston rod position on either side of the friction force on the pressure difference between the size of the piston begins to slow down, when the speed exceeds the mm/s, speed to a certain amount of time, and then repeat the next cycle, cylinder piston movement speed will only produce uneven results. When the speed is less than the mm/s, the speed will be reduced to zero, because of the initial value, and the piston stop moving. When the cycle is repeated, the piston is moving again. In the process of cylinder crawling phenomenon will appear. Therefore, prone to low-speed cylinder 'crawl' phenomenon.