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1. (WO2017177936) AXIAL PLUNGER PUMP

Pub. No.:    WO/2017/177936    International Application No.:    PCT/CN2017/080380
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Fri Apr 14 01:59:59 CEST 2017
IPC: F04B 1/16
F04B 1/12
Applicants: WUHAN MAJOR DAY DIGITAL MACHINERY MANUFACTURING CO., LTD.
武汉钜威天数字化机械制造有限公司
Inventors: ZHU, Yanwei
朱焱炜
Title: AXIAL PLUNGER PUMP
Abstract:
Disclosed is an axial plunger pump. The axial plunger pump comprises a casing (1), an input main shaft (2) rotatably mounted inside the casing (1) and comprising an intermediate oblique bent section (22), a swash plate (5) rotatably mounted on the intermediate oblique bent section (22), a plurality of connecting rods (7), each connecting rod having one end hinged to the swash plate (5) via a ball head (71) and the other end provided with a plunger (4), and a cylinder block (10) having a cylinder hole (101) where the plunger (4) can be inserted in a reciprocating manner. The cylinder block (10) is fixed relative to the casing (1) and performs a spatial spherical oscillation along with the rotary swash plate (5) of the input main shaft (2), wherein the input main shaft (2) further comprises a first linear section (21). The first linear section (21) is rotatably supported on the casing (1) via a bearing (31), and a balance ring (25) is further provided on the first linear section (21), the balance ring (25) being of an eccentric structure and rotating together with the input main shaft (2). By providing the balance ring (25) of an eccentric structure, the unbalanced moment of the swash plate (5) can be further offset, thereby lowering the vibration and noise of the whole axial plunger pump.