Hydraulic cylinder maintenance (common faults and solutions)

Hydraulic cylinder is an important part of hydraulic system, which is often used in various mechanical equipment, such as excavators, cranes, metallurgical machinery and so on. The working principle of hydraulic cylinder is to use the pressure of hydraulic oil to push the piston, thus generating force and movement. However, due to long-term use and improper operation, the hydraulic cylinder will also have some faults, which will affect the normal work of the equipment. This paper will introduce the common faults and solutions of hydraulic cylinders to help readers better understand the maintenance methods of hydraulic cylinders.

First, the hydraulic cylinder leaks oil.

Oil leakage of hydraulic cylinder is one of the common faults of hydraulic cylinder, which is mainly caused by aging, wear and damage of seal. The oil leakage of hydraulic cylinder will lead to the pressure drop of hydraulic system and affect the normal work of equipment. The following is the solution to the oil leakage of hydraulic cylinder:

1. Replace seal.

Replacing seals is the most commonly used method to solve oil leakage of hydraulic cylinders. First of all, check whether the seal of the hydraulic cylinder is aging, worn or damaged. If so, the corresponding seal must be replaced. When replacing the seal, pay attention to the model and specification of the seal to ensure that the replaced seal can work normally.

Step 2 clean the hydraulic cylinder

Before replacing the seal, the inside of the hydraulic cylinder must be cleaned to ensure that the oil will not leak again after replacing the seal. When cleaning the hydraulic cylinder, cleaning agents and cleaning tools must be used to remove the oil and impurities in the hydraulic cylinder.

Second, the hydraulic cylinder cannot be restored.

The failure of hydraulic cylinder to retract is one of the common faults of hydraulic cylinder, which is mainly caused by the blockage or damage of the valve inside the hydraulic cylinder. The hydraulic cylinder can not be retracted, which will lead to the equipment not working normally and needs to be solved in time. The following is the solution to the problem that the hydraulic cylinder cannot be retracted:

1. Check the valve in the hydraulic cylinder.

The reason why the hydraulic cylinder cannot be retracted may be that the valve inside the hydraulic cylinder is blocked or damaged, so it is necessary to check whether the valve inside the hydraulic cylinder is normal. If the valve is found to be blocked or damaged, it needs to be replaced in time.

2. Check the oil circuit of the hydraulic system.

The reason why the hydraulic cylinder can't retract may also be that the oil circuit of the hydraulic system is blocked or damaged, so it is necessary to check whether the oil circuit of the hydraulic system is normal. If the oil circuit is blocked or damaged, it needs to be cleaned or replaced in time.

Third, the hydraulic cylinder moves slowly.

The slow motion of hydraulic cylinder is one of the common faults of hydraulic cylinder, which is mainly caused by the blockage of internal oil circuit or the high viscosity of hydraulic oil. The slow action of hydraulic cylinder will affect the normal work of equipment and need to be solved in time. The following is the solution to the slow movement of the hydraulic cylinder:

1. Check the viscosity of hydraulic oil.

The slow action of hydraulic cylinder may be caused by the high viscosity of hydraulic oil, so it is necessary to check whether the viscosity of hydraulic oil meets the requirements. If the viscosity of hydraulic oil is too high, it is necessary to replace the hydraulic oil that meets the requirements.

2. Check the oil circuit in the hydraulic cylinder.

The reason why the hydraulic cylinder moves slowly may also be that the internal oil circuit of the hydraulic cylinder is blocked, so it is necessary to check whether the internal oil circuit of the hydraulic cylinder is normal. If the oil circuit is blocked, it needs to be cleaned or replaced in time.