Troubleshooting measures for gear pump failure
Poor seal of gear pump produces air leak
1) Reduce the internal leakage method: Adjust the movement gap of the pump appropriately. If the pump body and the front and rear end caps are caused by burrs or flatness during assembly, trim the burrs with oil stone; grind the diamond on the flat plate or grind the surface grinder. Grinding, so that the flatness is not greater than 0. 005 mm.
1) Reduce the internal leakage method: Adjust the movement gap of the pump appropriately. If the pump body and the front and rear end caps are caused by burrs or flatness during assembly, trim the burrs with oil stone; grind the diamond on the flat plate or grind the surface grinder. Grinding, so that the flatness is not greater than 0. 005 mm.
The oil port pipe is not tightly sealed, and the pinion (drive shaft) seal is damaged and air is mixed. First tighten the suction port pipe sealing nut, and then check the sealing ring. If it is damaged, it should be replaced. If the time is too long, the spring inside the sealing ring is too loose to seal the shaft. The spring can be removed and the other end (non-conical end) is ground on the grinding wheel for a short period of time.
2) The oil level is close to or lower than the oil inlet and mixed with air. The inlet pipe is required to be immersed in the 2/3 height of the tank. Otherwise, the inlet pipe should be replaced and the tank should be refueled in time.
High noise and large fluctuations in oil pressure
1) External inspection first. Check the tubing, mounting bracket, and rack for looseness. If it is loose, tighten it; otherwise it will resonate.
2) Tooth deformation or poor contact. For new pumps, the accuracy of the tooth profile may not be high. The method is to replace the gears that meet the requirements or to repair and repair. After reassembly, pay attention to cleaning.
3) Air entering the pump (infiltrating air from the inlet pipe, the pump shaft seal or the pump body pump cover). The oil seal or paper pad can also be replaced by the above 1).
4) The axial clearance between the gear and the end cap is too small. Remove the gear and place it on a flat grinding machine to make it a little bit to make the gap moderate.
1) External inspection first. Check the tubing, mounting bracket, and rack for looseness. If it is loose, tighten it; otherwise it will resonate.
2) Tooth deformation or poor contact. For new pumps, the accuracy of the tooth profile may not be high. The method is to replace the gears that meet the requirements or to repair and repair. After reassembly, pay attention to cleaning.
3) Air entering the pump (infiltrating air from the inlet pipe, the pump shaft seal or the pump body pump cover). The oil seal or paper pad can also be replaced by the above 1).
4) The axial clearance between the gear and the end cap is too small. Remove the gear and place it on a flat grinding machine to make it a little bit to make the gap moderate.
评论
发表评论