Multi-row type tilting axis axial plunger pump

Abstract

The invention provides a multi-row type tilting axis axial plunger pump and belongs to the technical field of axial plunger pumps. At least two rows of plunger holes are formed in a cylinder body of the multi-row type tilting axis axial plunger pump; the quantities of all rows of plunger holes are different; the at least two rows of plunger holes are uniformly distributed in at least two circumferences which take a center line of the cylinder body as a circle center and are different in radius in an alternated and staggered manner; a plurality of oil passing holes for enabling flow distributing holes of a valve plate to be communicated with the plunger holes of the cylinder body are formed in the bottom of the cylinder body; in addition, the oil passing holes are distributed in the at least two circumferences which take the center line of the cylinder body as the circle center and are different in radius at the bottom of the cylinder body; the head of each flow distribution hole in the valve plate consists of at least two sections of circular arcs and tangent lines of the circular arcs; circle centers of the circular arcs are respectively positioned on at least two distribution circles of the oil passing holes in the bottom of the cylinder body; two transition areas are arranged on the valve plate; a damping groove is formed beside each section of circular arc of the two transition area; conical plungers are inserted into the at least two rows of plunger holes in the cylinder body and are hinged to a main shaft by ball heads arranged at one ends, extending out of the cylinder body, of the conical plungers.

Description

Technical field [0001] The invention relates to a multi-row oblique shaft axial piston pump and belongs to the technical field of axial piston pumps. Background technique [0002] The structure of the existing inclined axis axial piston pump is as follows: figure 1 As shown, it mainly includes bearing group 1, main shaft 2, connecting rod 3, plunger 4, center rod 5, valve plate 6, housing 7, return plate 8 and cylinder 9. Among them, a row of plunger holes 91 are provided on the cylinder 9 along the direction of the center line of the cylinder 9 and are evenly distributed on a circle with a certain radius length with a point on the center line of the cylinder as the center (such as figure 2 and image 3 shown), the number of plunger holes is mostly 7 or 9. An oil passage hole 92 communicating with the valve plate 6 is provided at the bottom of the plunger hole 91 . The connecting rod 3 and the plunger 4 form a connecting rod and plunger pair, which is inserted into the ...

AI Technical Summary

Problems solved by technology

However, for a traditional oblique axial piston pump with only a single row of plunger holes on the cylinder, if other conditions remain the same, if the number of plunger holes is increased, the cylinder will be greatly increased. Diameter, which will lead to an increase in the volume of the whole pump of the inclined axis axial piston pump

[0004] This shows that the above-mentioned existing oblique axis type axial piston pump obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

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