CN204124188U - With the loading machine steering hydraulic system of shuttle valve structure - Google Patents
With the loading machine steering hydraulic system of shuttle valve structure Download PDFInfo
- Publication number
- CN204124188U CN204124188U CN201420510867.7U CN201420510867U CN204124188U CN 204124188 U CN204124188 U CN 204124188U CN 201420510867 U CN201420510867 U CN 201420510867U CN 204124188 U CN204124188 U CN 204124188U
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- CN
- China
- Prior art keywords
- mouth
- shuttle valve
- variable pump
- valve
- plunger variable
- 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.)
- Withdrawn - After Issue
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Abstract
It is a kind of loading machine steering hydraulic system with shuttle valve structure that the utility model is announced.Comprise hydraulic reservoir 1, turn to plunger variable pump 3, facility plunger variable pump 4, stationary singnal deflector 6, flux amplification valve 7, left and right steering cylinder 8,9 and shuttle valve assembly 5; Shuttle valve assembly 5 comprises shuttle valve 52, stationary singnal stablizes damping 51 and load-sensitive signal stabilization damping 53; Being integrated with in shuttle valve assembly turns to stationary singnal to stablize damping, makes deflector prestage cutoff port two ends pressure reduction more stable, thus indirectly makes bearing circle rotating speed and delivery rate linear relationship better, and namely delivery rate is more controlled; When complete machine only turns to, the load-sensitive signal turning to plunger variable pump to get is the pressure signal through overcommutation in similar D type hydraulic half-bridge between two dampings, so just makes the delivery rate of plunger variable pump more steady.
Description
Technical field
The utility model relates to a kind of loading machine steering hydraulic system, specifically a kind of loading machine steering hydraulic system with shuttle valve structure.
Background technology
At present, in the loading machine steering hydraulic system using plunger variable pump and stationary singnal deflector, generally occur that loader complete machine when beating bearing circle soon turns to normally, and complete machine turns to the phenomenon of shake when beating bearing circle slowly, its concrete manifestation to steering cylinder is exactly creeping phenomenon appears in steering cylinder.This seriously reduces the traveling comfort of complete machine operation, and brings very big hidden danger to the safe in operation of complete machine.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of loading machine steering hydraulic system with shuttle valve structure, the utility model does not need to do too large transformation to original hydraulic system, the generation of loader complete machine jitter phenomenon when turning to can be avoided, thus improve traveling comfort and the safety of complete machine operation.
The technical scheme that the utility model is taked is: a kind of loading machine steering hydraulic system with shuttle valve structure, comprises hydraulic reservoir 1, turns to plunger variable pump 3, facility plunger variable pump 4, stationary singnal deflector 6, flux amplification valve 7 and left and right steering cylinder 8,9; The B mouth of described plunger variable pump 3 is connected with the HP mouth of described flux amplification valve 7; CL, CR mouth left and right steering cylinder 8,9 of control linkage respectively of flux amplification valve 7, its R, L mouth connects R, L mouth of described stationary singnal deflector 6 respectively, also be connected the P mouth of stationary singnal deflector 6 while its P mouth is connected with PP mouth, its T mouth connects the T mouth of stationary singnal deflector 6; The B mouth of described facility plunger variable pump 4 is connected with the P1 mouth of described main distributing valve 10; The P2 mouth of distributing valve 10 is connected to the EF mouth of flux amplification valve 7; Also comprise shuttle valve assembly 5; Described shuttle valve assembly 5 comprises shuttle valve 52, stationary singnal stablizes damping 51 and load-sensitive signal stabilization damping 53; The left LSS mouth of described shuttle valve 52 is connected to the LS mouth of stationary singnal deflector 6, and its LSS mouth stablizes by described stationary singnal the LS mouth that damping 51 is connected to flux amplification valve 7 again; LSW mouth in the middle part of shuttle valve 52 is connected to the X mouth of plunger variable pump 3; The right LSV mouth of shuttle valve 52 is connected to the X mouth of facility plunger variable pump 4 and the LS mouth of main distributing valve 10, and its LSV mouth is connected to again the LSW mouth of shuttle valve 52 by described load-sensitive signal stabilization damping 53.
Advantage of the present utility model: have employed a kind of Novel shuttle valve module in the steering hydraulic system that reason plunger variable pump and stationary singnal deflector form, being integrated with in shuttle valve assembly on the one hand turns to stationary singnal to stablize damping, make deflector prestage cutoff port two ends pressure reduction more stable, thus indirectly make bearing circle rotating speed and delivery rate linear relationship better, namely delivery rate is more controlled; On the other hand, when complete machine only turns to, steering load signal does not truly pass to the load-sensitive mouth turning to plunger variable pump, but the load-sensitive signal turning to plunger variable pump to get is the pressure signal through overcommutation in similar D type hydraulic half-bridge between two dampings, so just makes the delivery rate of plunger variable pump more steady.And the utility model simplifies the structure, avoid the sky high cost adopting energy storage as steering stabilizer.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of an embodiment of the present utility model;
Fig. 2 is the enlarged drawing of shuttle valve assembly in Fig. 1.
In figure: 1. hydraulic reservoir, 2. filter, 3. turn to and stablize damping, 52. shuttle valves, 53. load-sensitive signal stabilization dampings, 6. stationary singnal deflector, 7. flux amplification valve, 71. pressure-gradient control valves, 8. left steering oil cylinder, 9. right steering oil cylinder, 10. main distributing valve, 101. median signal unloading valves with plunger variable pump, 4. facility plunger variable pump, 5. shuttle valve assembly, 51. stationary singnals.
Detailed description of the invention
Be below a specific embodiment of the present utility model, first by reference to the accompanying drawings the utility model be further described.
As shown in Figure 1, turn to and be connected with hydraulic reservoir 1 respectively with D1 with the A mouth of plunger variable pump 3, its B mouth is connected with the HP mouth of pressure-gradient control valve 71 in flux amplification valve 7, the CL mouth of flux amplification valve 7 connects the loculus of left steering oil cylinder 8 and the large chamber of right steering oil cylinder 9 simultaneously, its CR mouth connects the large chamber of left steering oil cylinder 8 and the loculus of right steering oil cylinder 9 simultaneously, the R of flux amplification valve 7, L mouth connects the R of stationary singnal deflector 6 respectively, L mouth, the P mouth of stationary singnal deflector 6 is also connected while the P mouth of flux amplification valve 7 itself is connected with PP mouth, the HT mouth of flux amplification valve 7 is connected with hydraulic reservoir 1 by filter 2, the T mouth of flux amplification valve 7 connects the T mouth of stationary singnal deflector 6, namely the EF mouth of flux amplification valve 7 collaborates the P2 mouth of mouth connection main distributing valve 10, the facility A mouth of plunger variable pump 4 is connected with hydraulic reservoir 1 respectively with D1, and its B mouth is connected with the P1 mouth of main distributing valve 10, the T mouth of main distributing valve 10 is connected with hydraulic reservoir 1 respectively with D mouth.
Shuttle valve assembly 5 comprises shuttle valve 52, stationary singnal stablizes damping 51 and load-sensitive signal stabilization damping 53; The left LSS mouth of shuttle valve 52 stablizes by stationary singnal the LS mouth that damping 51 is connected to flux amplification valve 7 again while being connected to stationary singnal deflector 6LS mouth, the namely spring cavity of pressure-gradient control valve 71; LSW mouth in the middle part of shuttle valve 52 is connected to the X mouth of plunger variable pump 3; The right LSV mouth of shuttle valve 52 is connected to shuttle valve 52LSW mouth by load-sensitive signal stabilization damping 53 again while being connected to facility plunger variable pump 4X mouth, and the right LSV mouth of shuttle valve 52 is also connected to the LS mouth of main distributing valve 10, namely the A mouth of median signal unloading valve.
During work.On the one hand, during steering wheel rotation certain speed, the pressure signal of steering load is delivered to the LSS mouth of shuttle valve assembly 5 by the LS oral instructions of stationary singnal deflector 6, this signal stablizes by the inner integrated stationary singnal of shuttle valve assembly 5 the LS mouth that damping 51 and its LSP oral instructions are delivered to flux amplification valve 7, and be finally delivered to the spring cavity of pressure-gradient control valve 71, suitable adjustment stationary singnal stablizes the size of damping 51, make the spool displacement of pressure-gradient control valve 71 more steady, thus make the deflector prestage damping pressure reduction between the P mouth of stationary singnal deflector 6 and LS mouth more stable, thus indirectly make bearing circle rotating speed and delivery rate linear relationship better, so just achieve the object that delivery rate is more controlled, thus stopped one of complete machine hidden danger turning to shake, on the other hand, when complete machine turns to, the load pressure of the LS mouth of stationary singnal deflector 6 does not all pass to the X mouth turned to plunger variable pump 3 really, but after the load pressure signal of the LS mouth of stationary singnal deflector 6 flowed out by the LSS mouth of shuttle valve assembly 5 and load-sensitive signal stabilization damping 53 and its LSV mouth, flow to the A mouth of the median signal unloading valve 101 in main distributing valve 10, and its D mouth leads to low pressure, so just achieve the filter action of turn sign, thus turn to what receive with plunger variable pump 3 to be pulsation-free load-sensitive signal more, thus make its delivery rate more steady, work along both lines like this, thoroughly can stop the shake that complete machine turns to.
Claims (1)
1., with a loading machine steering hydraulic system for shuttle valve structure, comprise hydraulic reservoir (1), turn to plunger variable pump (3), facility plunger variable pump (4), stationary singnal deflector (6), flux amplification valve (7) and left and right steering cylinder (8,9);
The B mouth of described plunger variable pump (3) is connected with the HP mouth of described flux amplification valve (7); CL, CR mouth left and right steering cylinder of control linkage (8,9) respectively of flux amplification valve (7), its R, L mouth connects R, L mouth of described stationary singnal deflector (6) respectively, its P mouth is also connected the P mouth of stationary singnal deflector (6) while being connected with PP mouth, its T mouth connects the T mouth of stationary singnal deflector (6);
The B mouth of described facility plunger variable pump (4) is connected with the P1 mouth of described main distributing valve (10); The P2 mouth of distributing valve (10) is connected to the EF mouth of flux amplification valve (7);
It is characterized in that: also comprise shuttle valve assembly (5);
Described shuttle valve assembly (5) comprises shuttle valve (52), stationary singnal stablizes damping (51) and load-sensitive signal stabilization damping (53);
The described left LSS mouth of shuttle valve (52) is connected to the LS mouth of stationary singnal deflector (6), and its LSS mouth stablizes by described stationary singnal the LS mouth that damping (51) is connected to flux amplification valve (7) again; The LSW mouth at shuttle valve (52) middle part is connected to the X mouth of plunger variable pump (3); The right LSV mouth of shuttle valve (52) is connected to the X mouth of facility plunger variable pump (4) and the LS mouth of main distributing valve (10), and its LSV mouth is connected to again the LSW mouth of shuttle valve (52) by described load-sensitive signal stabilization damping (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510867.7U CN204124188U (en) | 2014-09-05 | 2014-09-05 | With the loading machine steering hydraulic system of shuttle valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510867.7U CN204124188U (en) | 2014-09-05 | 2014-09-05 | With the loading machine steering hydraulic system of shuttle valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204124188U true CN204124188U (en) | 2015-01-28 |
Family
ID=52380571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420510867.7U Withdrawn - After Issue CN204124188U (en) | 2014-09-05 | 2014-09-05 | With the loading machine steering hydraulic system of shuttle valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204124188U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192202A (en) * | 2014-09-05 | 2014-12-10 | 徐工集团工程机械股份有限公司科技分公司 | Loader steering hydraulic system with shuttle valve structure |
| CN104787111A (en) * | 2015-04-23 | 2015-07-22 | 圣邦集团有限公司 | Control valve for steering system |
| CN105201944A (en) * | 2015-09-25 | 2015-12-30 | 广西柳工机械股份有限公司 | Flow enlarging valve and hydraulic steering system |
-
2014
- 2014-09-05 CN CN201420510867.7U patent/CN204124188U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192202A (en) * | 2014-09-05 | 2014-12-10 | 徐工集团工程机械股份有限公司科技分公司 | Loader steering hydraulic system with shuttle valve structure |
| CN104192202B (en) * | 2014-09-05 | 2016-07-06 | 徐工集团工程机械股份有限公司科技分公司 | Loading machine steering hydraulic system with shuttle valve structure |
| CN104787111A (en) * | 2015-04-23 | 2015-07-22 | 圣邦集团有限公司 | Control valve for steering system |
| CN105201944A (en) * | 2015-09-25 | 2015-12-30 | 广西柳工机械股份有限公司 | Flow enlarging valve and hydraulic steering system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150128 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |