High pressure oil return hose for excavator

The hydraulic pump and high-pressure oil pipe on the excavator must ensure that the pressure is within a reasonable range during normal operation

The hydraulic pump and high-pressure oil pipe on the excavator must ensure that the pressure is within a reasonable range during normal operation, otherwise there will be many failures. The high-pressure oil return hose is produced under this premise.

Generally, the power of the hydraulic pump of the excavator is relatively large, and the oil return pressure is required to be high, so the material requirements for the oil return hose are also higher.

The high-pressure oil return hose for excavators is mainly used between the hydraulic pump and the high-pressure oil pipe in the hydraulic system to play a protective role. What problems should be paid attention to in use? Let’s take a brief look at it below!

Choose the right hydraulic pump

First, avoid direct contact between the pump shaft and the pump body during use to avoid damage.

1. The connection between the high-pressure oil return hose for the excavator and the pump should be a flexible hose, and do not directly contact the end of the pump to prevent the axial thrust of the pump from directly acting on the high-pressure oil return hose.
2. When installing, do not bypass the high-pressure oil return hose too tightly on the high-pressure pump, otherwise the high-pressure oil return hose will be permanently deformed and damaged.
3. When installing, the high-pressure oil return hose should be in a vertical position and fixed with a suitable pressing force.
4. Frequently check whether there is any leakage at the connection between the high-pressure oil return hose and the hydraulic pump, and repair it in time if any leakage is found. Replace the seal if necessary.

Second, pay attention to the coordination between the pump body and the pipeline during installation, and try to use flange connection.

When connecting with the pipeline, first of all, pay attention to the coordination between the pump body and the pipeline to ensure the concentricity between the pump body and the pipeline, otherwise it will cause the pump to vibrate during operation and reduce the service life; secondly, try to use flange connection during installation, To ensure the concentricity of the pipeline and the pump. In addition, pay attention to the matching degree of the pipe diameter and the pipe when connecting, so as to avoid deflection and cause the pressure of the piping system to be unstable.

Third, before installation, the working performance of the pump should be checked, and its main technical performance indicators should meet the requirements of the selected pump.

4. Connect the hose correctly. When connecting the hose, care should be taken not to create excessive pressure between the two parts inside the metal hose to prevent the metal hose from bursting or breaking.
5. Pay attention to observe the hydraulic oil. When the hydraulic oil temperature exceeds 55°C, the hydraulic pump should be cooled, otherwise it will cause damage to the hydraulic pump.
6. Pay attention to the installation length of the oil return pipeline in the hydraulic system to avoid failures caused by excessive installation.
7. Pay attention to the leakage of the oil return pipeline, if there is leakage, it will affect the working performance of the whole system.
8. Pay attention to whether the pipeline in the oil return pipeline is deformed or twisted.
9. Pay attention to whether there are impurities and dirt in the oil return pipeline, so as not to affect the normal operation of the hydraulic pump.
10. Pay attention to the sealing condition in the oil return pipeline to prevent external debris from entering the hydraulic system.

Fourth, after installation, attention should be paid to the tightness of the relevant sealing points on the pump body, and attention should be paid to avoid grease pollution.

2. Do not bend excessively. After installation, do not forcibly tighten the hose to avoid excessive bending deformation. The hose should be restored to its original shape in its natural state.
3. Try to avoid bending the high-pressure oil return hose for excavators, otherwise it will cause greater stress on the hose and shorten its service life.
4. When installing high-pressure hoses, special tools should be used.
5. After use, the high-pressure oil return hose for excavators should be cleaned, replaced and dried in time. If it is not replaced in time, it will cause damage to the hose and affect its service life.
6. Regularly inspect and maintain the high-pressure oil return hose for excavators to ensure its normal operation.
7. Try to choose high-pressure oil return hoses for excavators with good quality and reasonable price to prolong their service life.
8. When choosing a high-pressure oil return hose for an excavator, you should take your own economic affordability into consideration.

Fifth, the sealing condition of the hydraulic pump and its oil return pipeline should be checked regularly.

Due to the harsh working environment of the excavator, it needs to be started frequently during work, and the hydraulic pump and high-pressure oil pipe may collide. Therefore, the oil return hose is required to have high wear resistance and extrusion resistance. It should be kept clean to avoid oil pollution; before use, it is necessary to check whether there is any leakage in the hydraulic pump and oil return pipeline, and if so, take measures in time.