How to Handle Faults?

Oil leakage in the hydraulic pump station system of a wire rope socket pressing machine is one of the common faults in hydraulic transmission systems. Based on the location of leakage, it can be divided into two categories: internal leakage and connection point leakage. The causes of internal leakage are highly complex—some new equipment may leak, while some older equipment used for over a decade may not. To thoroughly resolve internal leakage issues, it is essential to understand the factors and pathways of leakage. Below, several typical cases are used to analyze the causes and solutions for internal leakage.

Oil Leakage in the Hydraulic Pump of the Socket Pressing Machine

Hydraulic components are not allowed to leak as finished products. However, due to various reasons, some newly manufactured hydraulic pumps may leak from the shaft neck when the oil temperature reaches just 50°C during pump station debugging. Analysis of the leakage location shows that most leaks occur from the low-pressure chamber, meaning oil that extensively seeps from the pressure chamber to the low-pressure chamber (internal leakage). Due to certain backpressure in the system, part of the low-pressure oil leaks externally. In some hydraulic components, the low-pressure chamber is not designed to return oil, such as the shaft extension area of hydraulic pumps. Oil leakage from the transmission shaft extension is common in various types of hydraulic pumps, particularly with the self-tightening rotary rubber seal in the shaft neck end cover of gear pumps. The causes of internal leakage in such structures include:

(1) The axial clearance of the pump exceeds the specified value, allowing a large amount of pressure oil to enter the low-pressure area, which forces the self-tightening rotary rubber seal open and causes external leakage.

(2) Long-term wear from use in the system increases the axial clearance of the pump, allowing a large amount of pressure oil to enter the low-pressure area and force the rotary seal open, resulting in external leakage.

(3) For newly assembled hydraulic pumps, the geometric dimensional tolerance of a certain component during manufacturing exceeds the specified value, or the cumulative dimensional tolerance of several components exceeds the specified value.

Regardless of the fault encountered, do not attempt repairs on your own. Feel free to contact us, and our engineers will professionally analyze the fault points and guide you through troubleshooting!