Learn How To Prevent Air From Entering The Hydraulic Cylinder System

To prevent air from entering the hydraulic cylinder system, the compressibility of the oil used in the system is very small. Under normal circumstances, it can be considered that the oil is incompressible. However, air is highly compressible, so even if there is a small amount of air in the system, its impact is still significant.

The air dissolved in the oil will escape from the oil at low pressure, generating bubbles and creating a cavitation phenomenon. When in the high-pressure area, under the action of pressure oil, these bubbles are quickly shattered and rapidly compressed, causing noise in the hydraulic cylinder system. At the same time, when the gas is suddenly compressed, it releases a large amount of heat, thereby causing local overheating, accelerating the rise in oil temperature, and damaging components and the oil. The high compressibility of air can also cause faults such as crawling of working devices, disrupting the stability of operation and sometimes resulting in vibration.

The method to prevent air from entering the system is:

1.The oil suction pipe and the oil return pipe should be placed below the oil surface and maintain a certain length.

2. All parts of the system should be kept filled with oil. The solution is to install a check valve at the outlet of the hydraulic pump and a back pressure valve on the return oil line.

3. The oil level in the fuel tank should be as large as possible. The suction side and the return side should be separated by a partition to achieve the purpose of removing air bubbles.