Knowledge Of Hardware Gear Pump: The Use Of Several Common Fault

Gear Pump through a pair of parameters and structure of the same involute gears meshing

with each other rolling, low-pressure oil within the tank can do work of high-pressure oil rose to an important part. Is the engine Machinery Can be converted into hydraulic energy power plant. Easy in its use during the following failures.

1, oil pump oil pump internal parts wear parts wear causes the internal leakage inside. One sleeve and the gear end float between the leakage area, is the main part of the internal leakage caused. This part of the internal leakage leakage accounted for all of 50% to 70%. Wear within the leak of the gear pump its volume reduced efficiency, output power significantly lower than the input pump power. The loss was transformed to heat, so it will cause pump overheating. If we combine graphic compression, due to work, there will be a floating sleeve wear caused by a small amount of movement, resulting in slow or not to upgrade tools to upgrade, so that the floating bushings must be replaced or repaired.

2, pump casing wear is mainly floating shaft bush wear (gear shaft and sleeve of the normal gap is 0.09 ~ 0.175mm, the maximum shall not exceed 0.20mm). Gear oil pressure on the role of work, gear oil pump housing near the tip, wear low-pressure cavity pump parts. Another is to wear face into the circle within the shell-like wear, such wear is not primarily the net result of adding the oil, so oil must be added without impurities.

3, seal wear and aging of rubber seal rubber seals unloading film aging deterioration, loss of elasticity, high pressure oil chamber and low pressure oil chamber lost its seal isolation effect, will produce high-pressure oil chamber to the low-pressure hydraulic oil cavity, called the "internal leak", which reduces the pump pressure and flow of work. CB46 gear pump its normal working pressure of 100 ~ 110kg / square centimeter, the normal oil level is 46L/min, a standard piece of rubber seals of unloading is 57 43. Since the tight seal is PG25 42 10 of the skeleton-type oil seal, its damage or failure in a long time, the air did give oil seal and the gap between the shaft journal or from the inlet plate and the pump shell access junction has been inhalation of oil pump, through return pipe into the tank, a large number of bubbles generated in the fuel tank. Will cause the oil to reduce fuel tank, engine oil increasing the oil tank bottom, thus making a slow or not to upgrade tools to upgrade. Must be ruled out that this failure to replace seals.

4, oil pump fuel supply shortage or non-hydraulic phenomena: Equipment upgrade slowly, shaking or can not upgrade when upgrading; tank or pipeline bubbles; upgrade issue when the hydraulic system, "ji, ji" sound; tractor just start working device can improve the working oil temperature rise for some time after the upgrade is slow or unable to upgrade; light load can improve, can not enhance the expansion stage, when heavy load. failure reasons: (1) hydraulic tank oil level is too low; (2) do not use hydraulic oil according to season; (3) into the pipeline to be dirt jams; (4) gear oil pump oil seal is damaged, the air into the hydraulic system; (5) into the pump, the oil port Connector Or bend connector "O" ring damaged, bent joint fastening Bolt Or into or out of pipe Nut Not on tight, the air into the hydraulic system; (6) pump internal leakage, seal aging; (7) pump seal or the main, driven gear shaft seal wear or scratches, the two sleeve face roughness tolerance; (8 ) oil pump assembly error caused by the internal components within the leakage; (9) "L" loaded "right hand" pump, resulting in washed out skeleton oil seal;

by: fdgbg

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