JPS58156185U

JPS58156185U - fluid control device

Info

Publication number: JPS58156185U
Application number: JP5364782U
Authority: JP
Inventors: 森井　隆夫; 相川　徹男
Original assignee: 油研工業株式会社
Priority date: 1982-04-15
Filing date: 1982-04-15
Publication date: 1983-10-18
Also published as: JPH0124389Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の制御装置を示す断面図、第２図は従来の
近似定馬力制御方式で得られた特性線図、第３図はこの
考案の実施例を示す油圧回路図、第４図は同じく一実施
例の模式構造図、第５図および第６図は圧力−流量特性
線図、第７図は別の実施例の模式構造図、第８図は設定
可変時の圧力−流量特性線図である。２２・・・可変容量形油圧ポンプ、２７・・・吐出量制
御要素、２６・・・オリフィス、２８・・・差圧感応形
絞り弁、３４・・・コンペンセータ弁。Fig. 1 is a sectional view showing a conventional control device, Fig. 2 is a characteristic diagram obtained by the conventional approximate constant horsepower control method, Fig. 3 is a hydraulic circuit diagram showing an embodiment of this invention, and Fig. 4 5 and 6 are pressure-flow characteristic diagrams, FIG. 7 is a schematic structural diagram of another embodiment, and FIG. 8 is the pressure-flow characteristic when the settings are variable. It is a line diagram. 22... Variable displacement hydraulic pump, 27... Discharge rate control element, 26... Orifice, 28... Differential pressure sensitive throttle valve, 34... Compensator valve.

Claims

[Scope of utility model registration request]

Selectively guide the discharge pressure of a variable displacement hydraulic pump to the discharge amount control element of the pump! Accordingly, in a fluid control device that controls the pressure vs. flow rate characteristic of the pump so as to approach a constant horsepower characteristic in which the discharge amount decreases as the pressure increases, a fluid control device that controls the pressure vs. flow rate characteristic of the pump so as to approach the constant horsepower characteristic in which the discharge amount decreases as the pressure increases A differential pressure sensitive throttle valve that changes the opening degree according to the orifice disposed in and the differential pressure before and after the orifice, receives the orifice inlet pressure on one end face with a large pressure receiving area, and adjusts the orifice outlet pressure. It operates in response to the differential pressure generated before and after the orifice and the throttle valve parallel to the orifice, which is received by the other end face together with the spring force of a possible spring, and guides the discharge pressure to the discharge amount control element of the pump (a compensator valve). A fluid control device comprising: