JPS57157802A - Surge pressure absorber circuit - Google Patents
Surge pressure absorber circuitInfo
- Publication number
- JPS57157802A JPS57157802A JP56043462A JP4346281A JPS57157802A JP S57157802 A JPS57157802 A JP S57157802A JP 56043462 A JP56043462 A JP 56043462A JP 4346281 A JP4346281 A JP 4346281A JP S57157802 A JPS57157802 A JP S57157802A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- throttle valve
- valve
- surge pressure
- surge
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE:To reduce surge pressure before a throttle valve in a power machine circuit, by utilizing an excessive difference of pressure caused from the surge pressure before and after the throttle valve, operating load sensing valve and connecting the spring chamber of a surge pressure absorbing valve to after the throttle valve. CONSTITUTION:If opening of a throttle valve 3 is rapidly decresed, surge pressure tends to be generated in a main line 2. In accordace with occurrence of this surge pressure, a difference of pressure before and after the throttle valve is increased, and a load sensing valve 11 is placed in a symbol position S3 to communicate a port (e) to (f), then fluid pressure after the throttle valve 3 is transmitted to a spring chamber 45 in a surge pressure absorbing valve 4. That is, pressure in the spring chamber 45 of the surge pressure absorbing valve 4 is reduced from pressure before the throttle valve 3 to pressure after the throttle valve 3. In consequence, the surge pressure absorbing valve 4 is surely opened, and surge pressure generated before the throttle valve can be reduced as compared with conventional pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56043462A JPS57157802A (en) | 1981-03-24 | 1981-03-24 | Surge pressure absorber circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56043462A JPS57157802A (en) | 1981-03-24 | 1981-03-24 | Surge pressure absorber circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57157802A true JPS57157802A (en) | 1982-09-29 |
| JPS6129401B2 JPS6129401B2 (en) | 1986-07-07 |
Family
ID=12664370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56043462A Granted JPS57157802A (en) | 1981-03-24 | 1981-03-24 | Surge pressure absorber circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57157802A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4665697A (en) * | 1983-08-03 | 1987-05-19 | Mannesmann Rexroth Gmbh | Hydraulic system for charging an accumulator |
| JPS62132275U (en) * | 1986-02-15 | 1987-08-20 | ||
| JPS62253968A (en) * | 1986-04-22 | 1987-11-05 | Daikin Ind Ltd | Capacity controller for variable capacity type pump |
| JP2009002390A (en) * | 2007-06-19 | 2009-01-08 | Komatsu Ltd | Hydraulic circuit |
-
1981
- 1981-03-24 JP JP56043462A patent/JPS57157802A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4665697A (en) * | 1983-08-03 | 1987-05-19 | Mannesmann Rexroth Gmbh | Hydraulic system for charging an accumulator |
| JPS62132275U (en) * | 1986-02-15 | 1987-08-20 | ||
| JPH0429089Y2 (en) * | 1986-02-15 | 1992-07-15 | ||
| JPS62253968A (en) * | 1986-04-22 | 1987-11-05 | Daikin Ind Ltd | Capacity controller for variable capacity type pump |
| JPH0676792B2 (en) * | 1986-04-22 | 1994-09-28 | ダイキン工業株式会社 | Displacement control device for variable displacement pump |
| JP2009002390A (en) * | 2007-06-19 | 2009-01-08 | Komatsu Ltd | Hydraulic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6129401B2 (en) | 1986-07-07 |
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