PROBLEM TO BE SOLVED: To suppress abrupt variation of a supply pressure in a spool valve type pressure governor.SOLUTION: In a spool valve type pressure governor 22 in which a spool valve mechanism 80 having a spool 84, which is moved according to a balance between a pressure of a pilot pressure chamber R4, into which a working fluid is introduced, as a pilot pressure, and a pressure of a pressure adjustment chamber R6 into which the supplied working liquid is introduced, is adopted, and which regulates the working liquid from a high pressure source to a pressure according to the pilot pressure and supplies the liquid, orifices 200, 202 are provided on any one of a liquid passage 100 which connects a pressure regulation port P3 to which the pressure-regulated working liquid is supplied and the spool valve mechanism to each other, and a liquid passage 98 which connects a low pressure port P2 for opening the working liquid to an atmospheric pressure and the spool valve mechanism to each other, for the purpose of restricting a flow of the working liquid.SELECTED DRAWING: Figure 2
【課題】 スプール弁式調圧器において、供給圧の急激な変動を抑制する【解決手段】 パイロット圧となる作動液が導入されるパイロット圧室R4の圧力と、供給される作動液が導入される調圧室R6の圧力とのバランスによって移動するスプール84を有するスプール弁機構80が採用されて、高圧源からの作動液をパイロット圧に応じた圧力に調圧して供給するスプール弁式の調圧器22において、調圧された作動液が供給される調圧ポートP3とスプール弁機構とを繋ぐ液通路100と、作動液を大気圧に開放する低圧ポートP2とスプール弁機構とを繋ぐ液通路98との少なくとも一方に、作動液の流れを制限するためにオリフィス200,202を設ける。【選択図】 図2
PRESSURE GOVERNOR
調圧器
2017-06-01
Patent
Electronic Resource
Japanese