Gear oil pump oil seal channeling fault solution

Gear oil pump can reveal important performance in the use of the loader, in which can fully demonstrate certain contribution, but often occurs in the use of a certain fault, in use to deal with it in time, ensure that in use is of great efficiency and working power, can meet the needs of different users and requirements. In the use of the loader, frequently, a certain amount of oil pump oil phenomenon, in use should be strictly attention, prevent the Now the next first, once appear to stop in time, prevent influence normal work. Gear oil pump channeling, that is, the hydraulic oil will break through the skeleton oil seal and overflow. This phenomenon is widespread, the main engine factory has a strong response, gear pump oil channeling seriously affects the normal operation of the loader and the reliability and environmental pollution of the gear pump.

 

Gear oil pump in use of loader are going for the following reasons may cause abnormal phenomenon, check the different parts of the gear oil pump, ensure the normal use of each component and safety, to show the important in the use of the loader's performance and value. The following part introduces the failure of gear oil pump and its solutions, etc. :

 

If the geometric shape of oil seal lip is not qualified, the tightening spring is too loose, which causes air leakage in the air tightness test. At this point, the oil seal should be replaced and the material and geometric shape should be tested (the quality difference between domestic oil seal and foreign advanced oil seal is large).

 

If there is a problem in gear pump processing and assembly, the center of gear shaft rotation is different from the center of front cover, which will cause oil seal partial grinding. At this point, the symmetry and displacement of front cover bearing hole to pin hole should be checked.

 

In case of this problem, cracks and scratches occur in the sealing ring, causing the secondary seal to be lax or even invalid. The pressure oil enters the oil seal of the framework (low pressure channel), so the oil seal is channeled. At this point, the sealing ring material and processing quality should be checked.

 

According to the feedback from customers, the gear pump oil seal oil channeling problem of gear pump assembled with variable speed pump is serious, so the processing quality of variable speed pump also has a great influence on oil channeling. The front cover oil passage between the oil seal of the frame of gear oil pump and the sealing ring is not smooth, which causes the pressure to increase here and breaks the oil seal of the frame. After the improvement, the pump oil channeling phenomenon has been improved obviously. Usually the working pump is installed in the variable speed pump, and the variable speed pump is also installed in the variable speed box. If the end of the gearbox or variable speed pump is excessively poor in the face of the center of gyration of spline shaft, accumulated error will be formed, which will cause the gear pump to bear the radial force at high speed rotating state, resulting in oil seal oil channeling. Variable speed pump is installed on the gearbox output shaft, and gear pump through a variable speed pump check mouth positioning and installed on the gearbox output shaft, if the variable speed pump check end face gear rotary center beat out-of-tolerance (vertical), also can make gear shaft rotary center and sealing oil seal center does not overlap and influence. During the processing and trial production of variable speed pump, the center of rotation should be checked to check the coaxial degree of the stop and the end face of the stop.

 

Gear pump outside check mouth and variable speed pump inside stop mouth and gear pump outside spline and gear box spline shaft inner spline, whether the gap is reasonable, both have influence on gear pump oil channeling. Because the internal and external stops belong to the positioning part, the fit gap should not be too large; The internal and external spline belongs to the drive part, and the clearance should not be too small to eliminate interference. Due to the gear oil pump shaft overhang of the gearbox output shaft spline and flower in the healthy effective contact length is short, and gear oil pump work transfer torque is bigger, the spline bear large torque roll extrusion and wear even key, generate huge heat, as a result causes skeleton oil seal rubber lip burns, aging, resulting in oil. It is recommended that the spindle spline strength of gear pump shaft should be calibrated to ensure sufficient effective contact length when gear pump is used in the main plant.

 

The problems in the use of the loader hit gear pump to carry on the full analysis and solve in time, ensure the normal use of loader and work, do not delay the normal use, improve the work efficiency and value.

The above:Accumulator description