Digital flow distribution and speed adjustment type low-speed axial plunger pump

数字配流与调速式低速轴向柱塞泵

Abstract

A digital flow distribution and speed adjustment type low-speed axial plunger pump comprises a shell, an input shaft mechanism arranged in the shell, a return mechanism, five sets of plungers each provided with a high-speed electromagnetic switch valve, and corresponding flow pass structures, wherein the tail end of the input shaft mechanism is provided with an angle encoder connected with an electronic control unit, the five high-speed electromagnetic switch valves are controlled respectively through the electronic control unit, the input end of each high-speed electromagnetic switch valve is connected with a corresponding plunger cavity, and two output ends of each are connected with a low-voltage cavity and a high-voltage cavity respectively. By modifying the whole flow pass structure of the axial plunger pump, all friction pairs are lubricated with cold oil; a pump block is simple and compact in structure, energy conversion efficiency is high, and the service life is extended; in addition, the high-speed electromagnetic switch valves distributed at the plunger cavities are used herein to replace traditional flow distribution plates or flow distribution one-way valves, and easy-to-control digital flow distribution and speed adjustment mode under random low-speed input is formed.
一种数字配流与调速式低速轴向柱塞泵,包括:壳体、设置于壳体内的输入轴机构、回程机构和五组分别配有高速电磁开关阀的柱塞和相应流道结构,其中:输入轴机构尾端上设有与电子控制单元相连的角度编码器,通过电子控制单元分别控制五个高速电磁开关阀;每个高速电磁开关阀输入端与对应柱塞腔相连,两个输出端分别与低压腔相连和高压腔相连。本发明通过改造轴向柱塞泵整体的流道结构,使各摩擦副均处于冷油润滑状态,泵体结构简单紧凑,能量转换效率高,使用寿命长;同时本发明采用分布于各柱塞腔的高速电磁开关阀取代传统配流盘或配流单向阀,形成易于控制的针对随机低转速输入下的数字式配流与调速。

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