Barrel shock absorber is widely used in automobile suspension system. It can damp the compression and tension stroke. It is called two-way interactive electric butterfly valve. New types of shock absorber are adopted, including gas filled shock absorber and resistance adjustable shock absorber. The working principle of the bidirectional cylinder shock absorber is expounded. When the stroke is compressed, the wheel is close to the body, the electric butterfly valve is compressed, and the piston moves downward on the electric butterfly valve.
The volume of the lower chamber of the piston decreases, the oil pressure rises, and the fluid flows through the chamber above the piston. The upper chamber is a part of the space occupied by the piston rod, so the volume of the upper chamber is smaller than that of the lower chamber. Some of the oil pushes the compression valve back onto the oil tank. These valves save oil and create the damping force of the suspension under compression.
The structure of the electric butterfly valve is a piston rod inserted into the cylinder, which is filled with oil. The throttle valve has a throttle valve on the piston, so that the oil in the two parts of the space separated by the piston can supplement each other. Damping force is generated when viscous fluid passes through the orifice. The smaller the orifice, the greater the damping force, the greater the oil viscosity, and the greater the damping force. If the size of the throttle valve is constant, the damping will affect the absorption of the electric butterfly valve when it works very fast. Therefore, establish a disc valve butterfly valve at the outlet hole. When the pressure changes, the valve opens, the orifice opening becomes larger, and the damping is smaller. Since the piston is bidirectional, there are butterfly valves on both sides of the piston, called compression valves and extension valves.