KR910008294A - 부하압력보상펌프 토출유량제어회로 - Google Patents
부하압력보상펌프 토출유량제어회로 Download PDFInfo
- Publication number
- KR910008294A KR910008294A KR1019900015843A KR900015843A KR910008294A KR 910008294 A KR910008294 A KR 910008294A KR 1019900015843 A KR1019900015843 A KR 1019900015843A KR 900015843 A KR900015843 A KR 900015843A KR 910008294 A KR910008294 A KR 910008294A
- Authority
- KR
- South Korea
- Prior art keywords
- flow rate
- center bypass
- discharge flow
- valve
- control circuit
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/06—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by means using a fluid jet
- F15B9/07—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by means using a fluid jet with electrical control means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
Claims (8)
- 가변용량펌프와, 이 가변용량펌프의 토출유에 의해 액튜에이터의 구동방향을 절환하는 센터바이패스형방향절환밸브와, 이 센터바이패스형 방향절환밸브의 센터바이패스통로의 하류측에 설치되고 센터바이패스유량을 제어하는 유량조정밸브와, 이 유량조정밸브의 하류측에 설치되고 상기 가변용량펌프의 토출유량을 제어하는 파이럿신호발생수단으로 이루어지고, 상기 유량저정밸브를, 상기 센터바이패스형방향절환밸브의 센터바이패스 통로의 개폐부개면적에 대응해서 제어되도록 설정함과 동시에, 상기 파이럿신호발생수단으로부터 끌어내지는 파이럿신호를, 상기 가변용량펌프의 토출유량이 상기 센터바이패스형방향절환밸브가 스플중립시에 있어서 최소로 되도록 설정하는 것을 특징으로 하는 부하압력보상펌프토출유량제어회로.
- 제1항에 있어서, 유량조정밸브는 개폐밸브로 이루어지고, 이 개폐밸브의 개도를 센터바이패스형방향절환밸브의 센터바이패스통로의 상류측압력과 하류측압력과의 차압 및 압축스프링의 스프링힘에 의해 제어하는 부하압력보상펌프토출유량제어회로.
- 제1항에 있어서, 유량보정밸브는 차압발생용의 가변초크를 갖는 압력보상수단이 붙은 유량조정밸브로 이루어지고, 상기 가변초크의 개도를 외부신호에 의해 제어하는 부하압력보상펌프토출유량제어회로.
- 제3항에 있어서, 가변초크의 개도를 제어하는 외부신호는, 센터바이패스형방향절환밸브의 절환밸브조작신호인 부하압력보상펌프토출유량제어회로.
- 제1항에 있어서, 유량조절밸브는 차압발생용의 가변스프링하중수단을 갖는 압력보상수단이 붙은 유량조정밸브로 이루어지고, 상기 가변스프링하중수단의 스프링하중을 외부신호에 의해 제어하는 부하압력보상펌프토출유량제어회로.
- 제5항에 있어서, 가변스프링하중수단의 스프링하중을 조절하는 외부신호는, 센터 바이패스형 방향절환밸브의 절환밸브조작신호인 부하압력보상펌프토출유량제어회로.
- 제1항에 있어서, 파이럿신호발생수단은 압력발생장치로 이루어지고, 이 압력발생장치의 상류측으로부터 파이럿신호를 끌어내어 가변용량펌프를 네거티브유량제어하는 부하압력보상펌프토출유량제어회로.
- 제1항에 있어서, 파이럿신호발생수단은 파이럿신호압력용펌프장치로 이루어지고, 이 펌프장치로부터 끌어내어진 파이럿신호에 의해 센터바이패스형방향절환밸브를 조작함과 동시에, 파이럿신호의 최대첨프토출유량제어용파이럿신호를 끌어내어 가변용량펌프를 포지티브 유량제어하는 부하압력보상펌프토출 유량제어회로.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1-269146 | 1989-10-18 | ||
JP26914689 | 1989-10-18 | ||
JP2-33879 | 1990-02-16 | ||
JP2033879A JP2848900B2 (ja) | 1989-10-18 | 1990-02-16 | 負荷圧補償ポンプ吐出流量制御回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR910008294A true KR910008294A (ko) | 1991-05-31 |
KR960016819B1 KR960016819B1 (ko) | 1996-12-21 |
Family
ID=26372660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019900015843A KR960016819B1 (ko) | 1989-10-18 | 1990-10-05 | 부하압력보상펌프토출유량제어회로 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2848900B2 (ko) |
KR (1) | KR960016819B1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100631063B1 (ko) * | 2001-12-20 | 2006-10-02 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 건설중장비용 유량제어장치 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5873245A (en) * | 1995-07-10 | 1999-02-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
JP3691197B2 (ja) * | 1997-02-27 | 2005-08-31 | 日立建機株式会社 | 油圧機械の油圧駆動装置及び方向切換弁装置 |
WO2014115407A1 (ja) * | 2013-01-25 | 2014-07-31 | 日立建機株式会社 | 建設機械の油圧駆動装置 |
JP7221101B2 (ja) * | 2019-03-20 | 2023-02-13 | 日立建機株式会社 | 油圧ショベル |
-
1990
- 1990-02-16 JP JP2033879A patent/JP2848900B2/ja not_active Expired - Fee Related
- 1990-10-05 KR KR1019900015843A patent/KR960016819B1/ko not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100631063B1 (ko) * | 2001-12-20 | 2006-10-02 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 건설중장비용 유량제어장치 |
Also Published As
Publication number | Publication date |
---|---|
JPH03213703A (ja) | 1991-09-19 |
JP2848900B2 (ja) | 1999-01-20 |
KR960016819B1 (ko) | 1996-12-21 |
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