High-pressure gear oil pump

Abstract

The invention discloses a high-pressure gear oil pump which comprises a pump body, two end covers, a driving gear shaft and a driven gear shaft. The two end covers are arranged at the two ends of the pump body correspondingly. The driving gear shaft and the driven gear shaft are arranged in the pump body. The driving gear shaft is provided with a driving gear, the driven gear shaft is provided with a driven gear, and the driving gear and the driven gear are in engaged transmission. According to the gear parameters of the driving gear and the driven gear, the pressure angle is 28 degrees, the center distance is 33 mm, the modulus is 3.25, and the number of teeth is 10. The gears of the parameters are adopted, and therefore the overlap coefficient of the gears can be effectively reduced, the radial clearance of the gears and the clearance at the engaging lines of the gears are automatically adjusted, and the oil trap volume is reduced; the sliding coefficient and contact stress of gear faces are reduced, leakage of engaging points is reduced, the axial size of the gear oil pump is reduced, and therefore the service life of the gears is prolonged, and the volume efficiency of the gear oil pump is improved; and the work reliability of the gear oil pump is effectively improved, the service life of the gear oil pump is effectively prolonged, the production cost is reduced, and economic benefits are improved.

Description

technical field [0001] The invention relates to a high-pressure gear oil pump. Background technique [0002] Gear oil pumps are suitable for conveying various lubricating liquids and are widely used in many mechanical systems. A traditional gear oil pump includes a pump body, a front cover and a rear cover respectively arranged at both ends of the pump body, and a driving gear shaft and a driven gear shaft arranged in the pump body. The driving gear shaft is provided with a driving gear and the driven gear shaft When the gear oil pump is running, the driving gear drives the driven gear to rotate, and the oil enters the pump body from the oil inlet hole and is discharged from the oil outlet hole. [0003] There is an existing gear oil pump, the gear parameters are: 3 modules, 10 teeth, center distance 33mm, pressure angle 20° (according to the current GB / T1356-1988 "Involute Cylindrical Gear Reference Tooth Profile" standard gear), For gear oil pumps with this structure, du...

AI Technical Summary

Problems solved by technology

[0003] There is an existing gear oil pump, the gear parameters are: 3 modules, 10 teeth, center distance 33mm, pressure angle 20° (according to the current GB / T1356-1988 "Involute Cylindrical Gear Reference Tooth Profile" standard gear), For gear oil pumps with this structure, due to the large overlap coefficient and backlash when the gears mesh, the pump is likely to heat up the hydraulic oil during operation, resulting in low volumetric efficiency, low power, short service life, and a displacement of only 0.4mL / r ~20mL / r, and can only be used under the rated pressure of 20MPa

Images