HOB hydraulic cylinder concept and application

HOB hydraulic cylinders are now widely used in more and more fields. And for its working principle, few people know about it. Here, let us make a preliminary understanding of its working principles and structures. HOB hydraulic cylinders are usually composed of a cylinder block, a cylinder rod (piston rod) and a seal. The inside of the cylinder block is divided into two parts by a piston, and one oil hole is respectively opened. Because the liquid compression ratio is very small, when one of the oil holes enters the oil, the piston will be pushed to make the other oil hole out of the oil, and the piston will drive the piston rod to extend (retract) the movement, and vice versa.

First of all, its most basic five components: 1- cylinder and cylinder head 2-piston and piston rod 3- sealing device 4- cushion device 5- exhaust device. The working principle of each cylinder is almost the same. For a manual jack, the jack is actually the simplest cylinder. Manually pressurized stalk (hydraulic manual pump) allows the hydraulic oil to enter the cylinder through a check valve. At this time, the hydraulic oil that enters the cylinder cannot be reversed because of the single-valve valve, forcing the cylinder rod upward, and then continuing to make the hydraulic oil. Continuously enter the hydraulic cylinder, so that it constantly rises. When it is lowering, it will open the hydraulic valve to make the hydraulic oil return to the tank. This is the simplest working principle. Others are improved on this basis, the cylinder and the cylinder The principle is basically the same.

According to Hydraulics Ligong Hydraulics, Li Gong understands the structure of commonly used hydraulic cylinders and can be divided into four types: 1 piston type 2 piston type 3 telescopic type 4 swing type cylinders and cylinders

Advantage 1 Because the pneumatic system uses pressure generally in the range of 0.2-1.0Mpa, the cylinder can not be a power component of high power. Hydraulic cylinders can be used for relatively large power components and use hydraulic systems.

Advantage 2 From the media, air can be inexhaustible, there is no cost and supply difficulties, used gas is directly discharged into the atmosphere, easy to handle, no pollution, hydraulic oil is the opposite.

Advantage 3 Air viscosity is small, the resistance is less than hydraulic oil.

Advantage 4 But the compression ratio of air is much larger than that of hydraulic oil, so its work stability and response are far away.

The hydraulic cylinder is the most important actuator in the hydraulic system. It converts hydraulic energy into mechanical energy and cooperates with various transmission mechanisms to complete various mechanical movements.