Double barrel shock absorber

The double barrel shock absorber means that the shock absorber has two inner and outer cylinders. The piston moves in the inner cylinder. Due to the entry and withdrawal of the piston rod, the volume of oil in the inner cylinder increases and shrinks, so it must be exchanged with the outer cylinder. To maintain the balance of oil in the inner cylinder. Therefore, there are four valves in the double-cylinder shock absorber, that is, in addition to the two throttle valves on the piston mentioned above, there are also a flow valve and a compensation valve installed between the inner and outer cylinders to complete the exchange function.