CN101255880B - Meso position unloading type flux amplification valve - Google Patents
Meso position unloading type flux amplification valve Download PDFInfo
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- CN101255880B CN101255880B CN2007103059609A CN200710305960A CN101255880B CN 101255880 B CN101255880 B CN 101255880B CN 2007103059609 A CN2007103059609 A CN 2007103059609A CN 200710305960 A CN200710305960 A CN 200710305960A CN 101255880 B CN101255880 B CN 101255880B
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Abstract
The present invention provides a median offloading type amplificative valve, on which are oil port P and T, oil port A and B, oil port L and R connected with a hydraulic motive proportion reversing valve (5), the oil input ports of the shuttle valve (2) are connected with oil port A and B respectively, the oil output port of the shuttle valve (2) are connected with oil port PAB of the hydraulic motive proportion reversing valve (9), the inlet port of a constant difference overflow valve (3) is connected with oil port P of the hydraulic motive proportion reversing valve (5), the output port of the constant difference overflow valve (3) is connected with oil port T, the spring of the constant difference overflow valve (3) is connected with oil port PC of the hydraulic motive proportion reversing valve (5), the inlet of the safety valve (4) is connected with oil port PC of hydraulic motive proportion reversing valve, the output port of the safety valve (4) are connected with oil port T. The median offloading type amplificative valve has merits of energy-saving, small turning vibration, perfect comfort of operation, simple structure, credible work, and can used widely in hydraulic system of project machine.
Description
Technical field
The present invention relates to the hydraulic flow amplifying valve, relate in particular to a kind of meta unloading type flux amplification valve.
Background technique
The hydraulic flow amplifying valve is widely used in the big-and-middle-sized engineering machinery steering hydraulic system, and its effect is that guide's control flow rate of commutator output is carried out flow and hydraulic power amplification according to certain magnification factor, the motion of control steering hydraulic executive component.At present, steering hydraulic system exist starting constantly vibrate, creep vibration, stop problem such as moment vibration, cause the work machine operation travelling comfort relatively poor; Simultaneously, under non-steering situation, there is effectively off-load of steering hydraulic pump, shortcoming such as cause that system energy consumption is big, temperature rise, steering pump life-span are low, the main cause that causes the problems referred to above is exactly the poor-performing of flux amplification valve.Abroad developed the flux amplification valve of some better performances, but its structure more complicated, cost an arm and a leg as Kawasaki Heavy Industries, DANFOSS, card top grade company.
Summary of the invention
The purpose of this invention is to provide a kind of meta unloading type flux amplification valve.
The technical solution adopted for the present invention to solve the technical problems is: described meta unloading type flux amplification valve, its characteristics are: described meta unloading type flux amplification valve 1 is provided with hydraulic fluid port P and the T that links to each other with the proportional reversing valve 5 that surges, hydraulic fluid port A and B, hydraulic fluid port L and R, the input hydraulic fluid port of its shuttle valve 2 links to each other with B with hydraulic fluid port A respectively, the output oil port of shuttle valve 2 links to each other with the hydraulic fluid port PAB of the proportional reversing valve 9 that surges, its constant difference overflow valve 3 imports link to each other with the hydraulic fluid port P of the proportional reversing valve 5 that surges, the outlet of constant difference overflow valve 3 links to each other with hydraulic fluid port T, the spring chamber of constant difference overflow valve 3 links to each other with the hydraulic fluid port PC of the proportional reversing valve 5 that surges, the import of safety valve 4 links to each other with the hydraulic fluid port PC of the proportional reversing valve 5 that surges, and the outlet of safety valve 4 links to each other with hydraulic fluid port T.
The present invention compares with background technique, the useful effect that has is: the main valve heart left part of the proportional reversing valve that surges of described meta unloading type flux amplification valve is provided with first annular groove, second annular groove, off-load annular groove and convex shoulder, left opening slot and right opening slot are arranged on the convex shoulder, and the valve body corresponding with main valve heart right part is provided with first and draws oily limit, second and draw oily limit, the first off-load limit, the second off-load limit; When steering hydraulic system does not turn to, the main valve heart of proportional reversing valve of surging makes the spring chamber off-load of shuttle valve output oil port PAB sealing, constant difference overflow valve, thereby make steering pump output fluid all by the constant difference overflow valve oil sump tank, steering pump is in unloading condition; When turning to, the main valve heart moves to left or moves to right, and the shuttle valve delivery pressure is communicated with the spring chamber of constant difference overflow valve, and the effect by constant difference overflow valve makes the pressure reduction substantially constant of oil-feed primary valve, guarantee the steering system traffic demand, unnecessary flow is by the constant difference overflow valve oil sump tank.Primary valve has adopted level Four to quicken or the throttling groove that slows down arranges that the meter out groove area makes the oil cylinder oil back chamber have certain back pressure all the time less than the meter in groove area, thereby makes that to turn to starting, operation, stopped process steady; The primary valve throttling groove has adopted shallow U-groove bevel type, utilizes the two-step throttle drag effect of throttling groove itself to make mobile stable, inhibition air pocket in the valve port take place, thereby has reduced the noise of valve; First oil-feed tank is a K shape, and first oil-return groove is a V-arrangement, and the former length is shorter than the latter, makes main valve close into and out of hydraulic fluid port is asynchronous, has avoided the hydraulic shock phenomenon.This meta unloading type flux amplification valve has energy-conservation (off-load of non-steering situation steering pump), turn to advantages such as vibration is little, operation comfort good, simple in structure, reliable operation, can be widely used in the construction machinery hydraulic system.
Description of drawings
Fig. 1 is a hydraulic principle schematic representation of the present invention, Fig. 2 is the structural representation of the proportional reversing valve 9 that surges among Fig. 1, Fig. 3 is the partial enlarged drawing of Fig. 2, Fig. 4 a is the circumferentially deploying schematic representation of the main valve heart among Fig. 2, Fig. 4 b be the A-A of the main valve heart among Fig. 4 a to sectional view, Fig. 4 c is that the B-B of the main valve heart among Fig. 4 a is to sectional view.Reference character and corresponding name are called: meta unloading type flux amplification valve 1, shuttle valve 2, constant difference overflow valve 3, safety valve 4, the proportional reversing valve 5 that surges, valve gap 6, spring seat 7, spring 8, back-up ring 9, valve body 10, the first pilot valve throttling limit 10a, first draws oily limit 10b, second draws oily limit 10c, the first off-load limit 10d, the second off-load limit 10e, the second meter out limit 10f, the first meter in limit 10g, the second meter in limit 10h, the first meter out limit 10i, the second pilot valve throttling limit 10j, the main valve heart 11, pilot valve throttling groove 11a, the first annular groove 11b, convex shoulder 11c, left side opening slot 11d, right opening slot 11e, the second annular groove 11f, off-load annular groove 11g, the first oil-feed tank 11h, the second inlet channel 11i, the 3rd oil-feed tank 11j, the 4th oil-feed tank 11k, the first oil-return groove 11l, the second oil-return groove 11m, the 3rd oil-return groove 11n, the 4th oil-return groove 11o.
Embodiment
As Fig. 1,2,3, shown in 4, described meta unloading type flux amplification valve 1 is provided with hydraulic fluid port P and the T that links to each other with the proportional reversing valve 5 that surges, hydraulic fluid port A and B, hydraulic fluid port L and R, the input hydraulic fluid port of its shuttle valve 2 links to each other with B with hydraulic fluid port A respectively, the output oil port of shuttle valve 2 links to each other with the hydraulic fluid port PAB of the proportional reversing valve 9 that surges, its constant difference overflow valve 3 imports link to each other with the hydraulic fluid port P of the proportional reversing valve 5 that surges, the outlet of constant difference overflow valve 3 links to each other with hydraulic fluid port T, the spring chamber of constant difference overflow valve 3 links to each other with the hydraulic fluid port PC of the proportional reversing valve 5 that surges, the import of safety valve 4 links to each other with the hydraulic fluid port PC of the proportional reversing valve 5 that surges, and the outlet of safety valve 4 links to each other with hydraulic fluid port T.
The described proportional reversing valve 5 that surges mainly includes valve gap 6, the valve body 10 and the main valve heart 11, the main valve heart 11 is arranged in the valve body 10, the two ends of the main valve heart 11 are provided with by spring seat 7 and back-up ring 9 and are installed in spring 8 in the valve gap 6, valve gap 6 is provided with hydraulic fluid port L and R, valve body 10 is provided with hydraulic fluid port T, hydraulic fluid port A and B, hydraulic fluid port PC, hydraulic fluid port P and hydraulic fluid port PAB, the left part of the main valve heart 11 is provided with the first annular groove 11b, the second annular groove 11f, off-load annular groove 11g and convex shoulder 11c, convex shoulder 11c is provided with paired left opening slot 11d and right opening slot 11e, the position that valve body 10 is corresponding with convex shoulder 11c is provided with first and draws oily limit 10b, second draws oily limit 10c, the position that valve body 10 is corresponding with off-load annular groove 11g is provided with the first off-load limit 10d, the second off-load limit 10e, there are four throttling groove groups at the main valve heart 11 middle parts, four throttling groove groups are about the center line SS symmetry on the main valve heart 11, the throttling groove group of center line SS both sides is respectively by the first paired oil-feed tank 11h, the second oil-feed tank 11i, the 3rd oil-feed tank 11j, the 4th oil-feed tank 11k forms, two other throttling groove group is respectively by the first paired oil-return groove 11l, the second oil-return groove 11m, the 3rd oil-return groove 11n, the 4th oil-return groove 11o forms, four throttling groove groups respectively with valve body 10 on the first meter in limit 10g, the second meter in limit 10h, the first meter out limit 10i, the second meter out limit 10f has constituted four primary valves, the pilot valve throttling groove 11a at the main valve heart 11 two ends respectively with the first pilot valve throttling limit 10a at valve body 10 two ends, the second pilot valve throttling limit 10j has constituted two pilot valve mouths.
The described main valve heart 11 is a guiding valve, the off-load annular groove 11g of its left part and the first off-load limit 10d, the second off-load limit 10e have positive opening amount, left side opening slot 11d, right opening slot 11e draw oily limit 10c, first and draw oily limit 10b and the plus lap amount is arranged, the equal and opposite in direction of positive opening amount and plus lap amount with second respectively.
The second oil-feed tank 11i on the described main valve heart 11, the 3rd oil-feed tank 11j, the 4th oil-feed tank 11k, the second oil-return groove 11m, the 3rd oil-return groove 11n, the 4th oil-return groove 11o are the shallow trench U-groove bevel of the degree of depth less than width dimensions, the first oil-feed tank 11h is a K shape groove, and the first oil-return groove 11l is a V-shaped groove.
The length of the described second oil-return groove 11m, the 3rd oil-return groove 11n, the 4th oil-return groove 11o and width equate with the second oil-feed tank 11i, the 3rd oil-feed tank 11j, the 4th oil-feed tank 11k respectively, but the degree of depth of the second oil-return groove 11m, the 3rd oil-return groove 11n, the 4th oil-return groove 11o degree of depth than the second oil-feed tank 11i, the 3rd oil-feed tank 11j, the 4th oil-feed tank 11k respectively is little, and the axial length of the second oil-feed tank 11i, the 3rd oil-feed tank 11j, the 4th oil-feed tank 11k reduces one by one.
The described first oil-feed tank 11h is shorter than the first oil-return groove 11l in the length of the main valve heart 11 axial directions; Oil sealing length between the first oil-feed tank 11h and the first meter in limit 10g is greater than the oil sealing length between the first meter out limit 10i on the first oil-return groove 11l and the valve body 10.
Described pilot valve throttling groove 11a is shaped as V-shaped groove, and the oil sealing length between the pilot valve throttling groove 11a and the first pilot valve throttling limit 10a is negative value, and promptly the pilot valve mouth is positive opening form.
The external connected tank of described hydraulic fluid port T, the external steering pump of hydraulic fluid port P, the external oil cylinder that turns to of hydraulic fluid port A and B, the output oil port of hydraulic fluid port L and the external commutator of R.
Working procedure of the present invention is: when non-steering situation, be that hydraulic fluid port L and R do not have fuel feeding, the pilot valve throttling groove 11a at the main valve heart 11 two ends and the first pilot valve throttling limit 10a, oil sealing length is for negative between the second pilot valve throttling limit 10j, two chambeies at two ends, the main valve heart 11 left and right sides communicate, pressure equates, the main valve heart 11 is at spring 8, be in meta under the effect of back-up ring 9, hydraulic fluid port P, A, B, T all seals, hydraulic fluid port PC is by off-load annular groove 11g, the second off-load limit 10e, the first off-load limit 10d, the second annular groove 11f and oil return T connect, the pressure of hydraulic fluid port PC is reduced to oil return low pressure, the pressure of the spring chamber of the constant difference overflow valve 3 that is connected with hydraulic fluid port PC also is oil return low pressure, constant difference overflow valve 3 is in the low-pressure opening state, steering pump P mouth output flow is all by the constant difference overflow valve oil sump tank, and promptly steering pump is in unloading condition.
When turning to, as the L fuel feeding, the R oil return, when passing through pilot valve throttling groove 11a, this pilot flow produces pressure reduction, the main valve heart 11 moves right under the difference force effect, hydraulic fluid port PC and hydraulic fluid port T disconnect, the hydraulic fluid port PAB of shuttle valve 2 is communicated with hydraulic fluid port PC by left opening slot 11d, thereby make that the pressure of spring chamber of constant difference overflow valve 3 is the outlet pressure of shuttle valve 2, oil-feed tank 11h～11k and oil-return groove 11l～11o connect step by step, hydraulic fluid port P and A connect, hydraulic fluid port B and T connect, the pressure reduction of meter in groove 11h～11k valve port two ends P and A mouth is the pressure reduction of constant difference overflow valve 3, and this pressure reduction keeps substantially constant, and hydraulic fluid port A output flow depends on the opening amount of the main valve heart 11.
Claims (8)
1. meta unloading type flux amplification valve, it is characterized in that: described meta unloading type flux amplification valve (1) is provided with hydraulic fluid port P and the T that links to each other with the proportional reversing valve that surges (5), hydraulic fluid port A and B, hydraulic fluid port L and R, the input hydraulic fluid port of its shuttle valve (2) links to each other with B with hydraulic fluid port A respectively, the output oil port of shuttle valve (2) links to each other with the hydraulic fluid port PAB of the proportional reversing valve that surges (9), its constant difference overflow valve (3) import links to each other with the hydraulic fluid port P of the proportional reversing valve that surges (5), the outlet of constant difference overflow valve (3) links to each other with hydraulic fluid port T, the spring chamber of constant difference overflow valve (3) links to each other with the hydraulic fluid port PC of the proportional reversing valve that surges (5), the import of safety valve (4) links to each other with the hydraulic fluid port PC of the proportional reversing valve that surges (5), and the outlet of safety valve (4) links to each other with hydraulic fluid port T.
2. meta unloading type flux amplification valve according to claim 1, it is characterized in that the described proportional reversing valve that surges (5) mainly includes valve gap (6), the valve body (10) and the main valve heart (11), the main valve heart (11) is arranged in the valve body (10), the two ends of the main valve heart (11) are provided with by spring seat (7) and back-up ring (9) and are installed in the interior spring (8) of valve gap (6), valve gap (6) is provided with hydraulic fluid port L and R, valve body (10) is provided with hydraulic fluid port T, hydraulic fluid port A and B, hydraulic fluid port PC, hydraulic fluid port P and hydraulic fluid port PAB, the left part of the main valve heart (11) is provided with first annular groove (11b), second annular groove (11f), off-load annular groove (11g) and convex shoulder (11c), convex shoulder (11c) is provided with paired left opening slot (11d) and right opening slot (11e), the position that valve body (10) is corresponding with convex shoulder (11c) is provided with first and draws oily limit (10b), second draws oily limit (10c), the position that valve body (10) is corresponding with off-load annular groove (11g) is provided with the first off-load limit (10d), the second off-load limit (10e), there are four throttling groove groups at the main valve heart (11) middle part, four throttling groove groups are about center line (SS) symmetry on the main valve heart (11), the throttling groove group of center line (SS) both sides is respectively by paired first oil-feed tank (11h), second oil-feed tank (11i), the 3rd oil-feed tank (11j), the 4th oil-feed tank (11k) is formed, two other throttling groove group is respectively by paired first oil-return groove (11l), second oil-return groove (11m), the 3rd oil-return groove (11n), the 4th oil-return groove (11o) is formed, four throttling groove groups respectively with valve body (10) on the first meter in limit (10g), the second meter in limit (10h), the first meter out limit (10i), the second meter out limit (10f) has constituted four primary valves, the pilot valve throttling groove (11a) at the main valve heart (11) two ends respectively with the first pilot valve throttling limit (10a) at valve body (10) two ends, the second pilot valve throttling limit (10j) has constituted two pilot valve mouths.
3. meta unloading type flux amplification valve according to claim 2, it is characterized in that the described main valve heart (11) is a guiding valve, the off-load annular groove (11g) of its left part has positive opening amount with the first off-load limit (10d), the second off-load limit (10e), a left side opening slot (11d), right opening slot (11e) draw oily limit (10c), first and draw oily limit (10b) and the plus lap amount is arranged, the equal and opposite in direction of positive opening amount and plus lap amount with second respectively.
4. meta unloading type flux amplification valve according to claim 2, it is characterized in that second oil-feed tank (11i), the 3rd oil-feed tank (11j), the 4th oil-feed tank (11k), second oil-return groove (11m), the 3rd oil-return groove (11n), the 4th oil-return groove (11o) on the described main valve heart (11) are the shallow trench U-groove bevel of the degree of depth less than width dimensions, first oil-feed tank (11h) is a K shape groove, and first oil-return groove (11l) is a V-shaped groove.
5. meta unloading type flux amplification valve according to claim 4, it is characterized in that described second oil-return groove (11m), the 3rd oil-return groove (11n), the length of the 4th oil-return groove (11o) and width respectively with second oil-feed tank (11i), the 3rd oil-feed tank (11j), the 4th oil-feed tank (11k) equates, but second oil-return groove (11m), the 3rd oil-return groove (11n), the degree of depth of the 4th oil-return groove (11o) is respectively than second oil-feed tank (11i), the 3rd oil-feed tank (11j), the degree of depth of the 4th oil-feed tank (11k) is little, second oil-feed tank (11i), the 3rd oil-feed tank (11j), the axial length of the 4th oil-feed tank (11k) reduces one by one.
6. meta unloading type flux amplification valve according to claim 4 is characterized in that described first oil-feed tank (11h) is shorter than first oil-return groove (11l) in the length of the main valve heart (11) axial direction; Oil sealing length between first oil-feed tank (11h) and the first meter in limit (10g) is greater than the oil sealing length between the first meter out limit (10i) on first oil-return groove (11l) and the valve body (10).
7. meta unloading type flux amplification valve according to claim 2, the V-shaped groove that is shaped as that it is characterized in that described pilot valve throttling groove (11a), oil sealing length between the pilot valve throttling groove (11a) and the first pilot valve throttling limit (10a) is negative value, and promptly the pilot valve mouth is positive opening form.
8. meta unloading type flux amplification valve according to claim 1 is characterized in that the external connected tank of described hydraulic fluid port T, the external steering pump of hydraulic fluid port P, the external oil cylinder that turns to of hydraulic fluid port A and B, the output oil port of hydraulic fluid port L and the external commutator of R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103059609A CN101255880B (en) | 2007-12-10 | 2007-12-10 | Meso position unloading type flux amplification valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103059609A CN101255880B (en) | 2007-12-10 | 2007-12-10 | Meso position unloading type flux amplification valve |
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| Publication Number | Publication Date |
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| CN101255880A CN101255880A (en) | 2008-09-03 |
| CN101255880B true CN101255880B (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007103059609A Active CN101255880B (en) | 2007-12-10 | 2007-12-10 | Meso position unloading type flux amplification valve |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557202B (en) * | 2013-11-04 | 2015-07-29 | 中石化胜利油建工程有限公司 | The meta off-load damping loop of large discharge electro-hydraulic reversing valve |
| CN108317119A (en) * | 2018-04-09 | 2018-07-24 | 徐州燕大传动与控制技术有限公司 | A kind of proportional multi-way valve that hydraulic control inlet and outlet throttling side can be separately adjustable |
| CN114576228B (en) * | 2022-05-06 | 2022-07-22 | 英轩重工有限公司 | Flow amplifying valve and steering hydraulic control system thereof |
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| US4759182A (en) * | 1987-07-24 | 1988-07-26 | Eaton Corporation | Steering control unit with flow amplification |
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| EP0388711A1 (en) * | 1989-03-20 | 1990-09-26 | Eaton Corporation | Open-center steering control unit with flow amplification |
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2007
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| US3902401A (en) * | 1968-03-13 | 1975-09-02 | Caterpillar Tractor Co | Hydraulic flow amplifier valve |
| US4759182A (en) * | 1987-07-24 | 1988-07-26 | Eaton Corporation | Steering control unit with flow amplification |
| US4862690A (en) * | 1988-10-06 | 1989-09-05 | Eaton Corporation | Steering control unit with both flow amplification and manual steering capability |
| EP0388711A1 (en) * | 1989-03-20 | 1990-09-26 | Eaton Corporation | Open-center steering control unit with flow amplification |
| US4914913A (en) * | 1989-05-03 | 1990-04-10 | Caterpillar Inc. | Load responsive flow amplified control system for power steering |
| CN201144912Y (en) * | 2007-12-10 | 2008-11-05 | 兰州理工大学 | Middle position unloading type flow amplifying valve |
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| 刘昕晖 |
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| 王同建;刘昕晖;王祥玉.流量放大阀特性试验研究.工程机械 2006年 11期.2006,(200611),全文. * |
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Owner name: ZHEJIANG GAOYU HYDRAULIC MECHANICAL AND ELECTRICAL Free format text: FORMER OWNER: LANZHOU UNIVERSITY OF TECHNOLOGY Effective date: 20140703 |
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Effective date of registration: 20140703 Address after: 317000 Zhejiang 317000 Ocean Street zhe Xi Road No. 358 Patentee after: Zhejiang Gaoyu Hydraulic Mechanical and Electrical Co., Ltd. Address before: 730050, No. 287 LAN Gong Ping, Qilihe District, Gansu, Lanzhou Patentee before: Lanzhou University Of Technology |
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Inventor after: Jiang Jun Inventor after: Tan Zhengsheng Inventor after: Wei Liejiang Inventor after: Fan Xinjian Inventor after: Cai Zheng Inventor after: Ji Hong Inventor after: Chi Jianwei Inventor after: Liu Xinqiang Inventor after: Pan Cunqian Inventor after: Jiang Jianxing Inventor after: Wang Shaoxiong Inventor after: Yu Haiyang Inventor before: Ji Hong Inventor before: Tan Zhengsheng Inventor before: Wei Liejiang Inventor before: Fan Xinjian |
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