Swash plate type axial plunger pump

Abstract

The swash plate type axial plunger pump comprises a pump body, a rear cover, a swash plate in a cavity, a cylinder body, a rotating shaft and a plurality of ball head plungers, the ball centers of ball heads are located on the same plane, the cylinder body is provided with an internal spline, the rotating shaft is provided with an external spline, the external spline is provided with a convex part and a concave part which are evenly distributed in the circumferential direction, and the top wall and the side wall of the convex part and the bottom wall of the concave part are all in a convex arc shape. The rear cover is provided with a central axis, the first radial direction is provided with an oil suction channel and an oil outlet channel, the central axis is located between the oil suction channel and the oil outlet channel, the outer end is provided with an oil suction port and an oil outlet, and the inner end is provided with an oil suction crescent groove and an oil outlet crescent groove. The oil absorption channel comprises a first cylindrical channel section and a second horn-shaped channel section, the small end of the second channel section is connected with the oil absorption crescent groove, the hole center of the second channel section is closer to the central axis, and the hole diameter is equal to the radial width of the oil absorption crescent groove. The invention can reduce the overturning moment of the cylinder body, solves the problems of turbulence of the rear cover and the like, and adapts to the requirements of high rotating speed and compactness.

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