To provide a novel positive displacement decompression pump which can raise a limit value of pressurization without enlarging a size of a device, and can compress and decompress liquid pressure control object.SOLUTION: A novel positive displacement decompression pump comprises: fluid send-out parts 21-27 each having a variable volume mechanism 5, a first port 61 and a second port 62, and a valve mechanism 7; and a pump flow passage 3 in which three or more of the fluid send-out parts 21-27 are connected to one another in series. A volume maximum position P1, a volume minimum position P3 and a switching position P3 are included within a moving range of each piston 51, and the pump flow passage 3 is formed so that a closing movement process (movement between P2 and P3) in which the piston 51 moves between the switching position P2 and the volume minimum position P3 by the drive of a drive unit 4 is sequentially transited between the fluid send-out parts 21-27 toward a second inlet/outlet port 32 from a first inlet/outlet port 31, or toward the first inlet/outlet port 31 from the second inlet/outlet ports 32.SELECTED DRAWING: Figure 2
【課題】装置を大型化することなく加圧の限界値を高くすることができ、且つ液圧制御対象を加減圧可能な新たな容積式加減圧ポンプを提供する。【解決手段】本発明は、容積可変機構5と、第1ポート61及び第2ポート62と、弁機構7と、を有するフルード送出部21〜27と、3つ以上のフルード送出部21〜27が直列接続されて形成されたポンプ流路3と、を備え、各ピストン51の移動範囲には、容積最大位置P1と、容積最小位置P3と、切替位置P3と、が含まれ、ポンプ流路3は、駆動装置4の駆動により、ピストン51が切替位置P2と容積最小位置P3との間を移動する閉鎖移動工程(P2−P3間移動)が、第1出入口31から第2出入口32に向けて又は第2出入口32から第1出入口31に向けて、フルード送出部21〜27間を順番に移っていくように構成されている。【選択図】図2
POSITIVE DISPLACEMENT DECOMPRESSION PUMP
容積式加減圧ポンプ
2021-10-11
Patent
Electronic Resource
Japanese
10,000 psi positive displacement pump
Online Contents | 2009
Rotary positive displacement pump companies
Online Contents | 2003
Impulsive marine thruster and positive displacement pump
European Patent Office | 2020
|Positive displacement pump intended for washer systems
Online Contents | 2004