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1. (WO2018042746) NON-PULSATION PUMP

Pub. No.:    WO/2018/042746    International Application No.:    PCT/JP2017/014933
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu Apr 13 01:59:59 CEST 2017
IPC: F04B 11/00
F04B 9/04
F04B 13/00
Applicants: NIKKISO CO., LTD.
Inventors: MURAKOSHI Fusao
村越 富三雄
SATO Hideaki
佐藤 秀明
A non-pulsation pump (100) is provided with: a cam mechanism (16) that converts the rotational motion of a shared motor (11) into reciprocal motion having a prescribed phase difference; a plurality of cross heads (28, 48) that make reciprocal motion with a prescribed phase difference through the cam mechanism (16); and a plurality of reciprocating pumps (20, 40) that are driven with a prescribed phase difference and that include plungers (26, 46) connected to the cross heads (28, 48), wherein the total discharge flowrate toward a shared discharge pipe 36 is kept constant. This non-pulsation pump includes a preliminary compression step for moving the plungers (26, 46) of the reciprocating pumps (20, 40) to a discharge side by very small amounts before a discharging step but after a suction step, and has a stroke adjustment mechanism (80) for adjusting the effective stroke length of the plunger (26) in the preliminary compression step. Thus, generation of pulsation can be suppressed even when the set pressure changes.