JPS5756676A - Pressure controller of fluid machine - Google Patents
Pressure controller of fluid machineInfo
- Publication number
- JPS5756676A JPS5756676A JP56122242A JP12224281A JPS5756676A JP S5756676 A JPS5756676 A JP S5756676A JP 56122242 A JP56122242 A JP 56122242A JP 12224281 A JP12224281 A JP 12224281A JP S5756676 A JPS5756676 A JP S5756676A
- Authority
- JP
- Japan
- Prior art keywords
- discharge line
- pressure
- change over
- operation cylinder
- over valve
- 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
Landscapes
- Reciprocating Pumps (AREA)
Abstract
PURPOSE: To develop controlled three kinds of more of pressure in the discharge line of one pump, by alternatively introducing fluid in the discharge line of a variable capacity pressure pump or the like into a swash plate operation cylinder via a control valve, change over valve etc.
CONSTITUTION: Between a discharge line 20 of a variable capacity pressure pump or the like and a rear side of an operation cylinder 14 provided oppositely to a swash plate of said pump, there are provided two three-port type pressure control valves equipped with spools 16, 16' which are capable of freely regulating an opening pressure. Each spool 16, 16' is connected to the discharge line 20 through a four-port type change over valve 21, and a conducting path 22 communicating with the discharge line 20 during a neutral position of the change over valve 21 is communicated with the operation cylinder 14. With this arrangement, by selecting any one of the conducting path 22 and the two pressure control valves with the change over valve 21, the fluid in the discharge line 20 is introduced into the operation cylinder 14 to operate a swash plate, whereby pressures in the discharge line 20 are changed and controlled to three kinds of pressure.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56122242A JPS6046272B2 (en) | 1981-08-03 | 1981-08-03 | Pressure control device for fluid machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56122242A JPS6046272B2 (en) | 1981-08-03 | 1981-08-03 | Pressure control device for fluid machinery |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6130074A Division JPS5547231B2 (en) | 1974-05-28 | 1974-05-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5756676A true JPS5756676A (en) | 1982-04-05 |
| JPS6046272B2 JPS6046272B2 (en) | 1985-10-15 |
Family
ID=14831103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56122242A Expired JPS6046272B2 (en) | 1981-08-03 | 1981-08-03 | Pressure control device for fluid machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046272B2 (en) |
-
1981
- 1981-08-03 JP JP56122242A patent/JPS6046272B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6046272B2 (en) | 1985-10-15 |
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