The principle and characteristic of cylinder, hydraulic cylinder

First flying Wolf pneumatic to introduce the most basic part of the hydraulic cylinder, cylinder and the cylinder piston and piston rod sealing device buffer device exhaust system, the working principle of each cylinder are almost similar, there is a manual jacks, for example, it works. Jack also is actually a simple cylinder. By manual pressurization stem ( Hydraulic manual pump) Make hydraulic oil through a one-way valve into the cylinder, then into the cylinder of the hydraulic oil, because of the single valve can't back, forcing cylinder rod up, and then work continue to make the hydraulic oil into the hydraulic cylinder, thus constantly on the rise, will send when they open the hydraulic valve, hydraulic oil back to tank. This is the most simple working principle, the other is based on the improved. Principle is the same as the cylinder with the cylinder, and the advantages and disadvantages of the oil cylinder and the cylinder contrast will discuss the following: the pneumatic system is used in pressure. 。 Mpa range, so the cylinder is cannot make the high-power power element. It is possible to make a bigger of the power of the hydraulic cylinder components, using hydraulic pressure system, from medium air can be unlimited, no cost and supply difficulties, will be used directly into the atmosphere, easy to handle, not pollution. The hydraulic oil, by contrast, ha-ha. The resistance is less than the hydraulic oil viscosity is small, but the air compression ratio is greater than the hydraulic oil so its work stability and response there is a certain gap