CN203834556U - Single variable pump loading machine hydraulic system with steering priority function - Google Patents
Single variable pump loading machine hydraulic system with steering priority function Download PDFInfo
- Publication number
- CN203834556U CN203834556U CN201420236371.5U CN201420236371U CN203834556U CN 203834556 U CN203834556 U CN 203834556U CN 201420236371 U CN201420236371 U CN 201420236371U CN 203834556 U CN203834556 U CN 203834556U
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- mouth
- pump
- oil
- hydraulic
- opening
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- Expired - Fee Related
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- 239000003921 oil Substances 0.000 claims abstract description 37
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a single variable pump loading machine hydraulic system with a steering priority function, and belongs to the technical field of loading machines. The hydraulic system comprises a hydraulic oil tank, a variable hydraulic pump, a multi-way valve, a priority valve, a steering gear, a rotating bucket oil cylinder, a boom cylinder and a steering oil cylinder. The rotating bucket oil cylinder and the boom cylinder are connected with the multi-way valve, the steering oil cylinder is connected with the steering gear, an oil outlet of the variable hydraulic pump is connected with the P opening of the multi-way valve and the P opening of the priority valve, the LS opening of the multi-way valve is connected with the X opening of the variable pump, oil returns to the hydraulic oil tank from the T opening of the multi-way valve, the LS opening of the priority valve is connected with the LS opening of the steering gear, the EF opening of the priority valve is connected with the X opening of the variable pump, and oil returns to the hydraulic oil tank from the T opening of the priority valve. Compared with an original double-pump flow-combination hydraulic system and a single constant displacement pump hydraulic system, more energy is saved, a whole vehicle is sensitive in reaction, and pipelines the whole vehicle are more attractive.
Description
Technical field
The utility model relates to loader technical field, specifically a kind of single argument pump loader hydraulic system with the priority function of turning to.
Background technology
Current domestic loader hydraulic system mostly is hydraulic system of working and steering hydraulic system is respectively equipped with a hydraulic pump, by pressure-gradient control valve, realized Dual-pump flow-converging and turned to priority function, when loader does not turn to, the hydraulic oil of steering pump output does not all collaborate in hydraulic system of working forcibly by hydraulic valve.This hydraulic system cost is higher, and spill losses is large, is unfavorable for element and line arrangement.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of single argument pump loader hydraulic system with the priority function of turning to.
The technical solution of the utility model is: a kind of single argument pump loader hydraulic system with the priority function of turning to, comprises hydraulic oil container, volume adjustable hydraulic pump, banked direction control valves, pressure-gradient control valve, steering gear, rotary ink tank, boom cylinder, steering cylinder; Described rotary ink tank is connected with banked direction control valves with boom cylinder; Described steering cylinder is connected with steering gear;
Described volume adjustable hydraulic pump oil-out is connected with banked direction control valves P mouth, pressure-gradient control valve P mouth respectively;
Described banked direction control valves LS mouth is connected with variable pump X mouth, and the oil return of banked direction control valves T mouth is to hydraulic oil container;
Described pressure-gradient control valve LS mouth is connected with steering gear LS mouth, and pressure-gradient control valve EF mouth is connected with variable pump X mouth, and the oil return of pressure-gradient control valve T mouth is to hydraulic oil container.
It is further: at described volume adjustable hydraulic pump oil-out, to the oil circuit of banked direction control valves P mouth, be provided with one way valve.
Described pressure-gradient control valve EF mouth with to the oil circuit of variable pump X mouth, be provided with one way valve.
In described hydraulic oil container oil return opening oil circuit, be provided with oil return cleaner.
In the utility model system, oil circuit is shunted from volume adjustable hydraulic pump oil-out, and a road and banked direction control valves P mouth are connected to work system provides fluid, and a road and pressure-gradient control valve P mouth are connected to steering provides fluid.The LS mouth of banked direction control valves is that load-sensitive is controlled.
When hydraulic system of working pressure is greater than steering pressure, the pressure signal that volume adjustable hydraulic pump provides by banked direction control valves LS mouth changes discharge capacity and is preferably hydraulic system of working fluid is provided.
When hydraulic system of working pressure is less than steering hydraulic system pressure, steering gear LS mouth pressure signal is to pressure-gradient control valve LS mouth, make its spool I move to upper, by pressure-gradient control valve CF mouth to steering fuel feeding, and from EF mouth out pressure oil flow to banked direction control valves LS mouth, pressure oil flow to banked direction control valves spool II spool is pushed into left bit stream to banked direction control valves spool III, reduce banked direction control valves main valve plug openings of sizes, to improve work system pressure, make more oil flow to steering, realize and preferentially turning to.
The utility model has the advantages that: than former dual-pump combining hydraulic system and single hydraulic system with constant displacement pump, the utility model is more energy-conservation, and car load is quick on the draw, and car load pipeline is more attractive in appearance.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
In figure: 1, hydraulic oil container; 2, volume adjustable hydraulic pump; 3, banked direction control valves; 4, pressure-gradient control valve; 5, steering gear; 6, rotary ink tank; 7, boom cylinder; 8, steering cylinder.
The specific embodiment
Be below a specific embodiment of the present utility model, now by reference to the accompanying drawings the utility model be described further.
As shown in Figure 1, a kind of single argument pump loader hydraulic system with the priority function of turning to, rotary ink tank 6 is connected with banked direction control valves 3 with boom cylinder 7, and steering cylinder 8 is connected with steering gear 5; The oil suction from hydraulic oil container 1 of volume adjustable hydraulic pump 2 inlet ports, its oil-out is connected with pressure-gradient control valve 4P mouth with banked direction control valves 3P mouth respectively, at volume adjustable hydraulic pump 2 oil-outs, to being provided with an one way valve in the oil circuit of banked direction control valves 3P mouth, prevent that fluid is back to volume adjustable hydraulic pump 2, protection oil circuit; Banked direction control valves 3LS mouth is connected with variable pump 2X mouth, and the oil return of banked direction control valves 3T mouth is to hydraulic oil container 1; Pressure-gradient control valve 4LS mouth is connected with steering gear 5LS mouth, and pressure-gradient control valve 4EF mouth is connected with variable pump 2X mouth, and the oil return of pressure-gradient control valve 4T mouth is to hydraulic oil container 1, pressure-gradient control valve 4EF mouth with to the oil circuit of variable pump 2X mouth, be provided with an one way valve and prevent that fluid is back to pressure-gradient control valve 4EF mouth; In hydraulic oil container 1 oil return opening oil circuit, be provided with oil return cleaner.
When hydraulic system of working pressure is greater than steering pressure, the pressure signal that volume adjustable hydraulic pump 2 provides by banked direction control valves 3LS mouth changes discharge capacity and is preferably the steering hydraulic system that pressure is lower fluid is provided.
When hydraulic system of working pressure is less than steering hydraulic system pressure, steering gear 5LS mouth pressure signal is to pressure-gradient control valve 4LS mouth, make its spool I move to upper, by pressure-gradient control valve 4CF mouth to steering fuel feeding, and from EF mouth out pressure oil flow to banked direction control valves 3LS mouth, pressure oil flow to banked direction control valves 3 spool II spool is pushed into left bit stream to banked direction control valves 3 spool III, reduce banked direction control valves 3 main valve plug openings of sizes, to improve work system pressure, make more oil flow to steering, realize and preferentially turning to.
Claims (4)
1. a single argument pump loader hydraulic system with the priority function of turning to, comprises hydraulic oil container (1), volume adjustable hydraulic pump (2), banked direction control valves (3), pressure-gradient control valve (4), steering gear (5), rotary ink tank (6), boom cylinder (7), steering cylinder (8); Described rotary ink tank (6) is connected with banked direction control valves (3) with boom cylinder (7); Described steering cylinder (8) is connected with steering gear (5);
It is characterized in that:
Described volume adjustable hydraulic pump (2) oil-out is connected with banked direction control valves (3) P mouth, pressure-gradient control valve (4) P mouth respectively;
Described banked direction control valves (3) LS mouth is connected with variable pump (2) X mouth, and the oil return of banked direction control valves (3) T mouth is to hydraulic oil container (1);
Described pressure-gradient control valve (4) LS mouth is connected with steering gear (5) LS mouth, and pressure-gradient control valve (4) EF mouth is connected with variable pump (2) X mouth, and the oil return of pressure-gradient control valve (4) T mouth is to hydraulic oil container (1).
2. a kind of single argument pump loader hydraulic system with the priority function of turning to according to claim 1, is characterized in that: at described volume adjustable hydraulic pump (2) oil-out, to the oil circuit of banked direction control valves (3) P mouth, be provided with one way valve.
3. a kind of single argument pump loader hydraulic system with the priority function of turning to according to claim 1, is characterized in that: described pressure-gradient control valve (4) EF mouth with to the oil circuit of variable pump (2) X mouth, be provided with one way valve.
4. a kind of single argument pump loader hydraulic system with the priority function of turning to according to claim 1, is characterized in that: in described hydraulic oil container (1) oil return opening oil circuit, be provided with oil return cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420236371.5U CN203834556U (en) | 2014-05-09 | 2014-05-09 | Single variable pump loading machine hydraulic system with steering priority function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420236371.5U CN203834556U (en) | 2014-05-09 | 2014-05-09 | Single variable pump loading machine hydraulic system with steering priority function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203834556U true CN203834556U (en) | 2014-09-17 |
Family
ID=51512416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420236371.5U Expired - Fee Related CN203834556U (en) | 2014-05-09 | 2014-05-09 | Single variable pump loading machine hydraulic system with steering priority function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203834556U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285102A (en) * | 2019-07-01 | 2019-09-27 | 燕山大学 | Multiaxis emergency management and rescue vehicle fluid-link steering control system with Active Suspensions |
-
2014
- 2014-05-09 CN CN201420236371.5U patent/CN203834556U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285102A (en) * | 2019-07-01 | 2019-09-27 | 燕山大学 | Multiaxis emergency management and rescue vehicle fluid-link steering control system with Active Suspensions |
| CN110285102B (en) * | 2019-07-01 | 2020-05-15 | 燕山大学 | Multi-shaft emergency rescue vehicle hydraulic steering control system with active suspension |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 |