JPS5761125A - Oil pressure circuit for construction machinery - Google Patents
Oil pressure circuit for construction machineryInfo
- Publication number
- JPS5761125A JPS5761125A JP13530080A JP13530080A JPS5761125A JP S5761125 A JPS5761125 A JP S5761125A JP 13530080 A JP13530080 A JP 13530080A JP 13530080 A JP13530080 A JP 13530080A JP S5761125 A JPS5761125 A JP S5761125A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pressure
- valve
- pressure motor
- neutral position
- 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.)
- Pending
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To prevent the occurrence of cavitation due to the shortage of suction in the oil-pressure circuit of an oil-pressure type rotary excavator, etc., by using a system in which a counter-balance valve is made up of two valves and return oil from an oil-pressure motor is flowed into the suction side of the oil-pressure motor.
CONSTITUTION: Oil pressure from an oil-pressure pump 1 is flowed through an operating valve 2, the second and first valves 4 and 4 of counter-balance valve, and pipelines 5 and 6 into an oil-pressure motor 7, whereby turning a load 8 connected to the oil-pressure motor 7. When restoring the operating valve 2 to neutral position to stop the load 8, the pressure of the pipeline 9 is lowered and the second valve 3 is instantaneously restored to neutral position but the first valve 4 is slowly restored to the neutral position by the action of the throttle 13. Return oil from the oil-pressure motor 7 enters the pipeline 5 and is supplied into the suction side of the oil-pressure motor 7. Thus, cavitation due to the shortage of suction can be avoided.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13530080A JPS5761125A (en) | 1980-09-30 | 1980-09-30 | Oil pressure circuit for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13530080A JPS5761125A (en) | 1980-09-30 | 1980-09-30 | Oil pressure circuit for construction machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5761125A true JPS5761125A (en) | 1982-04-13 |
Family
ID=15148475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13530080A Pending JPS5761125A (en) | 1980-09-30 | 1980-09-30 | Oil pressure circuit for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5761125A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006017263A (en) * | 2004-07-05 | 2006-01-19 | Nabtesco Corp | Cavitation preventing hydraulic circuit |
| KR20210011431A (en) | 2018-05-22 | 2021-02-01 | 미츠비시 파워 가부시키가이샤 | Burner and combustion device |
-
1980
- 1980-09-30 JP JP13530080A patent/JPS5761125A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006017263A (en) * | 2004-07-05 | 2006-01-19 | Nabtesco Corp | Cavitation preventing hydraulic circuit |
| JP4633393B2 (en) * | 2004-07-05 | 2011-02-16 | ナブテスコ株式会社 | Anti-cavitation hydraulic circuit |
| KR20210011431A (en) | 2018-05-22 | 2021-02-01 | 미츠비시 파워 가부시키가이샤 | Burner and combustion device |
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