JPS57134006A - Control valve - Google Patents
Control valveInfo
- Publication number
- JPS57134006A JPS57134006A JP56019953A JP1995381A JPS57134006A JP S57134006 A JPS57134006 A JP S57134006A JP 56019953 A JP56019953 A JP 56019953A JP 1995381 A JP1995381 A JP 1995381A JP S57134006 A JPS57134006 A JP S57134006A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- chamber
- load pressure
- valve
- moved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To smoothly raise a cylinder even if load pressure varies around a set pressure of a sequence valve by providing a sequence valve which is not reset if a spool is not returned to a neutral position, once the sequence valve is operated. CONSTITUTION:When the spool 2 is moved to the right in the drawing, a cylinder 28 is raised. If load pressure is below a set pressure of a spring 32, oil in a chamber 31 is put in a chamber 29, resulting in an increase in speed. If load pressure is above the set pressure, pressure oil of a pump 7 forces a poppet 18 to open, so that a main valve 17 is moved and oil in the chamber 31 is put back to a tank 38 so as to raise the cylinder only by discharged fluid of the pump 7. Once the main valve 17 is moved, a hole 23 and a hole 24 are communicated to each other, and a chamber 33 is cmmunicated by the tank 38, whereby even if load pressure is below the above set pressure to shut the poppet 18, differential pressure before and behind an orifice 19 is maintained, so that the valve 17 does not move in spite of fluctuations in load pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56019953A JPS57134006A (en) | 1981-02-13 | 1981-02-13 | Control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56019953A JPS57134006A (en) | 1981-02-13 | 1981-02-13 | Control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57134006A true JPS57134006A (en) | 1982-08-19 |
| JPH0112961B2 JPH0112961B2 (en) | 1989-03-02 |
Family
ID=12013559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56019953A Granted JPS57134006A (en) | 1981-02-13 | 1981-02-13 | Control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57134006A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5065664A (en) * | 1989-04-03 | 1991-11-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Control circuit for a cylinder allowing flow between an upper and a lower chamber |
| JPH05215103A (en) * | 1992-02-03 | 1993-08-24 | Takami Seiki Kk | Speed-increasing hydraulic circuit |
-
1981
- 1981-02-13 JP JP56019953A patent/JPS57134006A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5065664A (en) * | 1989-04-03 | 1991-11-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Control circuit for a cylinder allowing flow between an upper and a lower chamber |
| JPH05215103A (en) * | 1992-02-03 | 1993-08-24 | Takami Seiki Kk | Speed-increasing hydraulic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0112961B2 (en) | 1989-03-02 |
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