machine pumps, automotive lubrication system for increasing oil pressure, other means to help lubricating oil from the sump member reach. No oil pump, the oil is difficult to reach the oil pan from the friction member, effective lubrication effect can not be played, in addition, the oil pump may further store a oil.
1 Classification and Features
Gear oil pump
Gear oil pump high pressure oil, simple structure, easy processing, stable , long life, is widely applied;
working principle: when the engine is operating, drive gear driven oil pump driving gear is located on a camshaft drive gear causes the drive gear fixed to the rotary shaft, from gear drive gear role mainly as a rotational movement in the opposite direction, then it is supplied to the oil chamber of the oil pump along the backlash from the wall into the oil chamber. In this case, it is formed into the oil chamber at low pressure, is relatively low, that is, high pressure, high and low pressure according to the motion, the high pressure oil in the oil pan will be sucked into the low-pressure oil chamber within the oil pan. Since the main, the driven gear continuously rotates, reciprocates, so that oil will continue to be pressure-fedTo the corresponding part, so that the friction parts to be adequately lubricated, reduce component wear, improve performance, extended service life.
rotor-type oil pump
Multi-rotor pump by a powder metallurgical pressing, small size, compact structure complicated, but it also has some advantages gear pump.
Gerotor pump
Characteristics
1, small size, light weight, simple structure, and large oil. Structure gerotor pump rotor used inside and outside engagement, few teeth, compact size, simple structure sealed chamber, a small number of parts used, without isolation with other elements.
2, good high speed characteristics. For gerotor pump oil suction large angular range, at high-speed rotation, take advantage of the centrifugal force, so that the oil is filled in the tooth valley, to avoid ldquo; hole rdquo; phenomenon caused adverse consequences. Thus, Gerotor pump speed range may be several hundred to ten thousand rpm. And general involute gear pump, which is less than the rotational speed of 3000 rpm for at most, not more than the peripheral speed of 5 ~ 6m / s, it is because if the speed is too high, the centrifugal force will produce less than oil-filled tooth trough, forming ldquo; hole rdquo; phenomenon, thereby reducing the efficiency of the pump.
3, smooth operation, low noise. Gerotor pump inside and outside the rotor teeth are unequal, they differ a tooth. When relative movement thereof, each tooth surface wear small rotors, because the tooth surface of the small sliding speed, constantly meshing point is moved along the inner and outer rotor tooth profile. Further, its oil flow and movements are relatively stable, oil, and the oil discharge time is relatively full, and noise than the gear pump is much lower, due to the envelope the suction chamber and the discharge chamber large angle (approaching 145deg;) sake.
2. Related Applications
With the development of various types of technology, not only the oil pump is widely used in internal combustion engines, and more and more involved in other areas, such as semiconductor, solar, LCD and other engineering fields, in addition, automotive oil pump gerotor pump further It is applied to the sewing machine.