叶片泵故障与问题（Failure and problem of vane pump）.docVIP

叶片泵故障与问题（Failure and problem of vane pump） First, improper use of several manifestations: 1 、 wrong installation method: The A. connector is too tight because of the coupling and axial clearance is too small or no gap, in the hard hit, the bearing will be injured, cause early damage to the bearing and affect the whole life of the pump core. B. shaft axial force due to the coupling of axial clearance not certain at the time of installation, installation of rigid bearing and bearing ring will be damaged, which will hurt the entire pump core. C. coaxial tolerance: if the installation of coaxial degree exceeds the specified value, will make the eccentric bearing and pump core and early damage, general control in 0.1 mm or so. 2, the system environment is bad A. oil is too dirty: because the fuel tank is not sealed, the dust and iron filings are mixed into the oil, which can damage the oil pump in the early stage. B. temperature is too high: due to the absence of cooling equipment, the oil temperature will continue to rise in continuous use of the machine. If the oil temperature is longer than 70 degrees, the pump life will be greatly shortened, usually in six months to a year will be damaged (sometimes shorter). The influent C. oil: in the water cooling device, because the water seal is not good, cause water to enter the oil in the pump core parts have rust, locking, leaves behind phenomena such as. 3 、 the error in the direction of the rotor: A, pump core son not to Xiaokongli (or rotating out, then cause) the pump suction port space narrowing, oil resistance oil poor performance: big noise, pressure swing, long time will make the oil temperature rise too fast, the stator curve of impact wave shape after shortening the life. B, the rotation of the sealing ring cutting edge or screw fastening uneven, resulting in oil leakage. Two, common fault judgment: 1. research pump (Pan): Reason: oil is too dirty, improper installation, oil into the water, there is iron in the oil