CN104196800A - Combination valve with load sensitive function and capable of controlling inlet and outlet oil ways independently - Google Patents
Combination valve with load sensitive function and capable of controlling inlet and outlet oil ways independently Download PDFInfo
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- CN104196800A CN104196800A CN201410448401.3A CN201410448401A CN104196800A CN 104196800 A CN104196800 A CN 104196800A CN 201410448401 A CN201410448401 A CN 201410448401A CN 104196800 A CN104196800 A CN 104196800A
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Abstract
The invention discloses a combination valve with a load sensitive function and capable of controlling inlet and outlet oil ways independently. The combination valve comprises multiple unions of valve banks, a supply oil way P, a return oil way T and a load sensitive oil way LS. The multiple unions of valve banks comprise a plurality of valve bank bodies, the number of the valve bank bodies is not limited, and all the multiple unions of valve banks are the same in structural composition. Each union of valve bank in the multiple unions of valve banks comprises five two-position two-way electro-hydraulic proportional valves, two shuttle valves and a pressure compensation valve; after a controller receives active input signals of some union of valve bank, corresponding electronic control signals are sent to the corresponding five two-position two-way electro-hydraulic proportional valves according to corresponding control logic, therefore, flow of liquid entering a hydraulic cylinder and flow of the liquid flowing out of the hydraulic cylinder are controlled, and control over bidirectional movement of a hydraulic actuator is achieved. According to the combination valve, the load sensitive function and independent control over inlet and outlet oil ways are organically combined together, and the energy-saving characteristic of the load sensitive function is guaranteed; in addition, independent control over the inlet and outlet oil ways is achieved, a median function can be adjusted at will, and the combination valve has high efficiency and high response performance.
Description
Technical field
The present invention relates to a kind of combination brake switch and proporting with load-sensitive function, relate in particular to a kind of hydraulic circuit of importing and exporting and can carry out independent control, and there is the combination brake switch and proporting of multiple variable Median Function.
Background technique
Load sensitive system is that one is experienced system pressure-traffic demand, and the oil hydraulic circuit of required flow and pressure is only provided.The intact device that realizes load-sensitive control is made up of following element: first need a Variable plunger pump, this pump has a pressure compensator, and when system is not worked, compensator can be at the lower maintenance holding state of depressing.In the time that system proceeds to working state, the traffic demand of compensator impression system also provides adjustable flow according to traffic demand in the time that system condition changes.Meanwhile, the pressure demand of hydraulic system also will be experienced and respond to oil hydraulic pump.Then need a control valve with special induction oil circuit and valve port, to realize the complete control characteristic of load sensitive system, the required flow of system is that the traffic demand of system feeds back to oil hydraulic pump by signal road, control valve by the aperture control of guiding valve.The combination of this load-sensing formula plunger pump and load-sensitive control valve has according to load condition whole hydraulic system the characteristic that needs pressure-flow is provided.
In load-sensitive hydraulic system, a hydraulic actuator action in the control of load-sensitive control valve or one group of hydraulic actuator moves simultaneously.Because the spool of load-sensitive control valve is mechanically fixed together, this has just caused the single-way moving of spool controlling the flow that enters, flows out hydraulic actuator simultaneously, and the intrinsic repetition restriction loss of its control mechanism has caused that valve control system energy consumption is large, efficiency is low.For definite hydraulic actuator, need to process the spool with specific Median Function, therefore, its interchangeability and Economy have been subject to strict restriction.
Summary of the invention
In order to overcome prior art above shortcomings, the invention provides a kind of inlet/outlet hydraulic circuit with load-sensitive function and can carry out the independent combination brake switch and proporting of controlling, this invention not only has the energy conservation characteristic of load-sensitive function, and simple in structure, interchangeability good, and has higher efficiency and economic benefit.
The technical solution adopted for the present invention to solve the technical problems is:
The combination brake switch and proporting that a kind of import and export oil circuit with load-sensitive function is independently controlled, comprise Multigang valve group, supply with oil circuit P, oil circuit T, load-sensitive oil circuit LS, Multigang valve group shares unified supply oil circuit P, oil circuit T and load-sensitive oil circuit LS, and each connection valve group has two output oil ports that are connected with hydraulic actuator; Described Multigang valve group comprise the first valve group, the second valve group, the 3rd valve group ..., N connection valve group, N is more than or equal to 2 natural number here; Described the first valve group, the second valve group, the 3rd valve group ..., N connection valve group has identical components and parts and installation composition and identical structure annexation; The first described valve group comprises one first shuttle valve, one first bi-bit bi-pass electro-hydraulic proportional valve, one second bi-bit bi-pass electric-hydraulic proportion, one the 3rd bi-bit bi-pass electric-hydraulic proportion, one the 4th bi-bit bi-pass electro-hydraulic proportional valve, one the 5th bi-bit bi-pass electro-hydraulic proportional valve, a pressure-compensated valve and one second shuttle valve; First of the first connecting passage of one first bi-bit bi-pass electro-hydraulic proportional valve, the first connecting passage of one the 4th bi-bit bi-pass electro-hydraulic proportional valve and one first shuttle valve relatively held and is jointly connected with the first output oil port; Second of the first connecting passage of one second bi-bit bi-pass electro-hydraulic proportional valve, the first connecting passage of one the 5th bi-bit bi-pass electro-hydraulic proportional valve and one first shuttle valve relatively held and is jointly connected with the second output oil port; The first connecting passage of one the 3rd bi-bit bi-pass electro-hydraulic proportional valve is connected with one the 4th the second connecting passage of bi-bit bi-pass electro-hydraulic proportional valve and the first connecting passage of a pressure-compensated valve, and the second connecting passage of a pressure-compensated valve is connected with oil feeding line P; The second connecting passage of the second connecting passage of one first bi-bit bi-pass electro-hydraulic proportional valve, the second connecting passage of one second bi-bit bi-pass electro-hydraulic proportional valve and one the 3rd bi-bit bi-pass electro-hydraulic proportional valve is connected with oil circuit T jointly; The control port of one first shuttle valve output oil port, a pressure-compensated valve is relatively held and is connected with second of one second shuttle valve; First of one second shuttle valve is relatively held with the output oil port of bigeminy second shuttle valve of the second valve group and is connected;
First of bigeminy second shuttle valve of the second valve group is relatively held with the output oil port of 3 first shuttle valves of the 3rd valve group and is connected, by that analogy, the N-1 of N-1 connection valve group joins first of the second shuttle valve and relatively holds the output oil port that joins the second shuttle valve with the N of N connection valve group to be connected, and the N that N joins valve group joins first of the second shuttle valve and relatively holds with load-sensitive oil circuit LS and be connected.
Variable displacement pump provides power for whole hydraulic system, after controller receives a certain active input signal, according to corresponding control logic, five bi-bit bi-pass electro-hydraulic proportional valves to correspondence connection send corresponding automatically controlled signal, and then control enters, the flow of efflux cylinder pressure, the bidirectional-movement of realization control hydraulic actuator and O, H, Y, K, M, P, J, C, N-type Median Function.
The invention has the beneficial effects as follows: this invention not only has load-sensitive function, and have that the oil circuit of import and export is independently controlled, Median Function regulates at random, higher efficiency and response performance.Combination brake switch and proporting simplicity of design, easy to process, interchangeability good, need not, according to definite hydraulic actuator, customize corresponding spool, and small lot customized production is changed into production in enormous quantities, therefore, has comparatively considerable economic benefit.
Brief description of the drawings
Fig. 1 has the combination brake switch and proporting hydraulic schematic diagram that the import and export oil circuit of load-sensitive function is independently controlled;
Fig. 2 has the combination brake switch and proporting hydraulic system applications schematic diagram that the import and export oil circuit of load-sensitive function is independently controlled;
Fig. 3 has the combination brake switch and proporting hydraulic system applications theory diagram that the import and export oil circuit of load-sensitive function is independently controlled.
In above-mentioned accompanying drawing, 1. an oil hydraulic cylinder, 2. there are combination brake switch and proporting group that the import and export oil circuit of load-sensitive function independently controls the 3. one the first shuttle valves, 4. one first bi-bit bi-pass electro-hydraulic proportional valve, 5. one second bi-bit bi-pass electro-hydraulic proportional valve, 6. one the 3rd bi-bit bi-pass electro-hydraulic proportional valve, 7. one the 4th bi-bit bi-pass electro-hydraulic proportional valve IV, 8. one the 5th bi-bit bi-pass electro-hydraulic proportional valve, 9. a pressure-compensated valve, 10. one second shuttle valve, 11. variable displacement pumps, 12. hydraulic oil containers, 13. bigeminy the second shuttle valves, 14. bigeminy pressure-compensated valves, 15. bigeminy the 3rd bi-bit bi-pass electro-hydraulic proportional valve, 16. bigeminy the 5th bi-bit bi-pass electro-hydraulic proportional valve, 17. bigeminy the 4th bi-bit bi-pass electro-hydraulic proportional valve, 18. bigeminy the second bi-bit bi-pass electro-hydraulic proportional valves, 19. bigeminy the first bi-bit bi-pass electro-hydraulic proportional valves, 20. bigeminy the first shuttle valve I, 21. bigeminy oil hydraulic cylinders.
Embodiment
Embodiment
Fig. 1, 2 is respectively the combination brake switch and proporting hydraulic system applications schematic diagram that the combination brake switch and proporting hydraulic schematic diagram independently controlled of the import and export oil circuit with load-sensitive function of one embodiment of the invention and the import and export oil circuit with load-sensitive function are independently controlled, the combination brake switch and proporting that the import and export oil circuit with load-sensitive function of the present invention is independently controlled, comprise two valve groups, supply with oil circuit P, oil circuit T, load-sensitive oil circuit LS, two valve groups share unified supply oil circuit P, oil circuit T and load-sensitive oil circuit LS, each connection valve group has two output oil ports that are connected with hydraulic actuator, described two valve groups comprise the first valve group and the second valve group, and the first valve group and the second valve group have identical components and parts and installation composition and same structure annexation,
The first described valve group comprise first connecting passage of the first connecting passage, one the 4th bi-bit bi-pass electro-hydraulic proportional valve 7 of one first shuttle valve 3, one first bi-bit bi-pass electro-hydraulic proportional valve 4, one second bi-bit bi-pass electric-hydraulic proportion 5, one the 3rd bi-bit bi-pass electric-hydraulic proportion 6, one the 4th bi-bit bi-pass electro-hydraulic proportional valve 7, one the 5th bi-bit bi-pass electro-hydraulic proportional valve 8, a pressure-compensated valve 9 and one second shuttle valve 10, one first bi-bit bi-pass electro-hydraulic proportional valves 4 and one first shuttle valve 3 first relatively end be jointly connected with the first output oil port A1; Second of the first connecting passage of one second bi-bit bi-pass electro-hydraulic proportional valve 5, the first connecting passage of one the 5th bi-bit bi-pass electro-hydraulic proportional valve 8 and one first shuttle valve 3 relatively held and is jointly connected with the second output oil port B1; The second connecting passage of the first connecting passage of one the 3rd bi-bit bi-pass electro-hydraulic proportional valve 6 and one the 4th bi-bit bi-pass electro-hydraulic proportional valve 7 is connected with the first connecting passage of a pressure-compensated valve 9, and the second connecting passage of a pressure-compensated valve 9 is connected with oil feeding line P; The second connecting passage of the second connecting passage of one first bi-bit bi-pass electro-hydraulic proportional valve 4, the second connecting passage of one second bi-bit bi-pass electro-hydraulic proportional valve 5 and one the 3rd bi-bit bi-pass electro-hydraulic proportional valve 6 is connected with oil circuit T jointly; The control port of one first shuttle valve 3 output oil ports, a pressure-compensated valve 9 is relatively held and is connected with second of one second shuttle valve 10;
The second described valve group comprises bigeminy the first shuttle valve 20, bigeminy the first bi-bit bi-pass electro-hydraulic proportional valve 19, bigeminy the second bi-bit bi-pass electric-hydraulic proportion 18, bigeminy the 3rd bi-bit bi-pass electric-hydraulic proportion 15, bigeminy the 4th bi-bit bi-pass electro-hydraulic proportional valve 17, bigeminy the 5th bi-bit bi-pass electro-hydraulic proportional valve 16, bigeminy pressure-compensated valve 14 and bigeminy the second shuttle valve 13, the first connecting passage of bigeminy the first bi-bit bi-pass electro-hydraulic proportional valve 19, first of the first connecting passage of bigeminy the 4th bi-bit bi-pass electro-hydraulic proportional valve 17 and bigeminy the first shuttle valve 15 relatively held and is jointly connected with the first output oil port A2, second of the first connecting passage of bigeminy the second bi-bit bi-pass electro-hydraulic proportional valve 18, the first connecting passage of bigeminy the 5th bi-bit bi-pass electro-hydraulic proportional valve 16 and bigeminy the first shuttle valve 20 relatively held and is jointly connected with the second output oil port B2, the second connecting passage of the first connecting passage of bigeminy the 3rd bi-bit bi-pass electro-hydraulic proportional valve 15 and bigeminy the 4th bi-bit bi-pass electro-hydraulic proportional valve 17 is connected with the first connecting passage of bigeminy pressure-compensated valve 14, and the second connecting passage of bigeminy pressure-compensated valve 14 is connected with oil feeding line P, the second connecting passage of bigeminy the first bi-bit bi-pass electro-hydraulic proportional valve 19, the second connecting passage of bigeminy the second bi-bit bi-pass electro-hydraulic proportional valve 18 are connected with oil circuit T jointly with the second connecting passage of bigeminy the 3rd bi-bit bi-pass electro-hydraulic proportional valve 15, the control port of bigeminy the first shuttle valve 20 output oil ports, bigeminy pressure-compensated valve 14 and bigeminy the second shuttle valve 13 second relatively end be connected, first of the second shuttle valve 13 is relatively held with the output oil port of the second shuttle valve 20 of the second valve group and is connected,
First of one second shuttle valve 10 is relatively held with the output oil port of bigeminy second shuttle valve 13 of the second valve group and is connected; First of bigeminy second shuttle valve 13 of the second valve group is relatively held with load-sensitive oil circuit LS and is connected.There is the workflow of the hydraulic system of the combination brake switch and proporting that the import and export oil circuit of load-sensitive function independently controls in conjunction with Fig. 2,3 applications: variable displacement pump 11 provides power for whole hydraulic system, one oil hydraulic cylinder 1 and bigeminy oil hydraulic cylinder 21 are hydraulic actuator, and the first valve group and the second valve group control respectively an oil hydraulic cylinder 1 and bigeminy oil hydraulic cylinder 21 moves; After operating mode is determined, according to hydraulic actuator action demand, artificially initiatively input a certain control signal, after controller receives signal, according to corresponding control logic, send corresponding automatically controlled signal to five Proportional valves of correspondence connection, and then control enters, the flow of efflux cylinder pressure, realize the object of controlling oil hydraulic cylinder action, initiatively input 1 and initiatively input 2 not interference, mutually independently.
Table 1 is imported and exported the unit valve actuation with load-sensitive function and the middle bit function that oil circuit independently controls and is realized list
There is the hydraulic work system state of the combination brake switch and proporting that the import and export oil circuit of load-sensitive function independently controls according to table 1 application: taking the first valve group as example, the second valve group is identical with the first valve group control logic; When one second bi-bit bi-pass electro-hydraulic proportional valve 5 and one the 4th bi-bit bi-pass electro-hydraulic proportional valve 7 are opened simultaneously, (be designated hereinafter simply as for simplicity Proportional valve 5 and Proportional valve 7, other is also herewith called for short.), when Proportional valve 4, Proportional valve 6 and Proportional valve 8 are closed simultaneously, the piston rod of oil hydraulic cylinder is protruding; Open when Proportional valve 4 and Proportional valve 8, when Proportional valve 5, Proportional valve 6 and Proportional valve 7 are closed simultaneously, the piston rod of oil hydraulic cylinder is to retraction simultaneously; In the time of five Proportional valves 4, Proportional valve 5, Proportional valve 6, Proportional valve 7 and Proportional valve 8 Close All, realize O type Median Function; When Proportional valve 4, Proportional valve 5, Proportional valve 7 and Proportional valve 8 are opened simultaneously, when Proportional valve 6 cuts out, realize H type Median Function; Open when Proportional valve 4 and Proportional valve 5 simultaneously, when Proportional valve 6, Proportional valve 7 and Proportional valve 8 are closed, realize Y type Median Function simultaneously; Open when Proportional valve 4 and Proportional valve 7 simultaneously, when Proportional valve 5, Proportional valve 6 and Proportional valve 8 are closed, realize K type Median Function simultaneously; When Proportional valve 6 is opened, when Proportional valve 4, Proportional valve 5, Proportional valve 7 and Proportional valve 8 are closed simultaneously, realize M type Median Function; Open when Proportional valve 7 and Proportional valve 8 simultaneously, when Proportional valve 4, Proportional valve 5 and Proportional valve 6 are closed, realize P type Median Function simultaneously; When Proportional valve 5 is opened, when Proportional valve 4, Proportional valve 6, Proportional valve 7 and Proportional valve 8 are closed simultaneously, realize J type Median Function; When Proportional valve 6 is opened, when Proportional valve 4, Proportional valve 5, Proportional valve 7 and Proportional valve 8 are closed simultaneously, realize C type Median Function; When Proportional valve 4 is opened, when Proportional valve 5, Proportional valve 6, Proportional valve 7 and Proportional valve 8 are closed simultaneously, realize N-type Median Function.
Claims (1)
1. the combination brake switch and proporting that the import and export oil circuit with load-sensitive function is independently controlled, it is characterized in that: comprise Multigang valve group, supply with oil circuit P, oil circuit T, load-sensitive oil circuit LS, Multigang valve group shares unified supply oil circuit P, oil circuit T and load-sensitive oil circuit LS, and each connection valve group has two output oil ports that are connected with hydraulic actuator; Described Multigang valve group comprise the first valve group, the second valve group, the 3rd valve group ..., N connection valve group, N is more than or equal to 2 natural number here; Described the first valve group, the second valve group, the 3rd valve group ..., N connection valve group has identical components and parts and installation composition and identical structure annexation; The first described valve group comprises one first shuttle valve, one first bi-bit bi-pass electro-hydraulic proportional valve, one second bi-bit bi-pass electric-hydraulic proportion, one the 3rd bi-bit bi-pass electric-hydraulic proportion, one the 4th bi-bit bi-pass electro-hydraulic proportional valve, one the 5th bi-bit bi-pass electro-hydraulic proportional valve, a pressure-compensated valve and one second shuttle valve; First of the first connecting passage of one first bi-bit bi-pass electro-hydraulic proportional valve, the first connecting passage of one the 4th bi-bit bi-pass electro-hydraulic proportional valve and one first shuttle valve relatively held and is jointly connected with the first output oil port; Second of the first connecting passage of one second bi-bit bi-pass electro-hydraulic proportional valve, the first connecting passage of one the 5th bi-bit bi-pass electro-hydraulic proportional valve and one first shuttle valve relatively held and is jointly connected with the second output oil port; The first connecting passage of one the 3rd bi-bit bi-pass electro-hydraulic proportional valve is connected with one the 4th the second connecting passage of bi-bit bi-pass electro-hydraulic proportional valve and the first connecting passage of a pressure-compensated valve, and the second connecting passage of a pressure-compensated valve is connected with oil feeding line P; The second connecting passage of the second connecting passage of one first bi-bit bi-pass electro-hydraulic proportional valve, the second connecting passage of one second bi-bit bi-pass electro-hydraulic proportional valve and one the 3rd bi-bit bi-pass electro-hydraulic proportional valve is connected with oil circuit T jointly; The control port of one first shuttle valve output oil port, a pressure-compensated valve is relatively held and is connected with second of one second shuttle valve; First of one second shuttle valve is relatively held with the output oil port of bigeminy second shuttle valve of the second valve group and is connected; First of bigeminy second shuttle valve of the second valve group is relatively held with the output oil port of 3 first shuttle valves of the 3rd valve group and is connected, by that analogy, the N-1 of N-1 connection valve group joins first of the second shuttle valve and relatively holds the output oil port that joins the second shuttle valve with the N of N connection valve group to be connected, and the N that N joins valve group joins first of the second shuttle valve and relatively holds with load-sensitive oil circuit LS and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448401.3A CN104196800B (en) | 2014-09-04 | 2014-09-04 | The combination brake switch and proporting that a kind of import and export oil circuit with load-sensitive function independently controls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448401.3A CN104196800B (en) | 2014-09-04 | 2014-09-04 | The combination brake switch and proporting that a kind of import and export oil circuit with load-sensitive function independently controls |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196800A true CN104196800A (en) | 2014-12-10 |
| CN104196800B CN104196800B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410448401.3A Expired - Fee Related CN104196800B (en) | 2014-09-04 | 2014-09-04 | The combination brake switch and proporting that a kind of import and export oil circuit with load-sensitive function independently controls |
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| CN (1) | CN104196800B (en) |
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| CN105351278A (en) * | 2015-12-10 | 2016-02-24 | 上海新跃仪表厂 | Novel compound electro-hydraulic servo control system |
| CN105485082A (en) * | 2016-01-22 | 2016-04-13 | 郑州宇通重工有限公司 | Steering control 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 |
| CN108412829A (en) * | 2018-04-09 | 2018-08-17 | 徐州燕大传动与控制技术有限公司 | A kind of separately adjustable load-sensitive formula multi-way valve of inlet and outlet throttling side energy |
| CN108443273A (en) * | 2018-03-14 | 2018-08-24 | 燕山大学 | A kind of emergency management and rescue vehicle equipment oil return line pressure compensation throttle control system |
| CN108506259A (en) * | 2018-04-09 | 2018-09-07 | 徐州燕大传动与控制技术有限公司 | A kind of load sensing formula multi-way valve of the inlet and outlet independent control of valve post-compensation |
| CN108661965A (en) * | 2018-05-28 | 2018-10-16 | 徐州燕大传动与控制技术有限公司 | A kind of 3 position-5 way load port independent control multi-way valve with Y type Median Functions |
| CN108716491A (en) * | 2018-05-28 | 2018-10-30 | 徐州燕大传动与控制技术有限公司 | A kind of 3 position-5 way load port independent control multi-way valve with O-shaped Median Function |
| CN108975188A (en) * | 2018-08-31 | 2018-12-11 | 武汉船用机械有限责任公司 | A kind of hydraulic system |
| CN109083890A (en) * | 2018-08-23 | 2018-12-25 | 江苏理工学院 | A kind of assignment of traffic double valve-regulated load port separate control valves unrelated with load |
| CN109139598A (en) * | 2018-08-23 | 2019-01-04 | 江苏理工学院 | A kind of double valve-regulated load port separate control valves based on the compensation of machine hydraulic pressure difference |
| CN109630504A (en) * | 2018-12-26 | 2019-04-16 | 太原理工大学 | A kind of pressure compensated oil inlet and outlet autonomous control system of band |
| CN111022408A (en) * | 2020-01-06 | 2020-04-17 | 合肥工业大学 | Combination valve with return oil way compensation load sensing function |
| CN111594069A (en) * | 2020-05-19 | 2020-08-28 | 江苏理工学院 | Turnover type elevator control method based on load port independent control |
| CN113107929A (en) * | 2021-04-15 | 2021-07-13 | 中国铁建重工集团股份有限公司 | Load-sensitive hydraulic circuit |
| CN116164003A (en) * | 2023-03-07 | 2023-05-26 | 浙江大学 | Load port independent control valve for distributed hydraulic system and control method thereof |
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Cited By (21)
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|---|---|---|---|---|
| CN105351278A (en) * | 2015-12-10 | 2016-02-24 | 上海新跃仪表厂 | Novel compound electro-hydraulic servo control system |
| CN105485082A (en) * | 2016-01-22 | 2016-04-13 | 郑州宇通重工有限公司 | Steering control valve |
| CN108443273B (en) * | 2018-03-14 | 2019-08-27 | 燕山大学 | A kind of emergency management and rescue vehicle equipment oil return line pressure compensation throttle control system |
| CN108443273A (en) * | 2018-03-14 | 2018-08-24 | 燕山大学 | A kind of emergency management and rescue vehicle equipment oil return line pressure compensation throttle control system |
| 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 |
| CN108412829A (en) * | 2018-04-09 | 2018-08-17 | 徐州燕大传动与控制技术有限公司 | A kind of separately adjustable load-sensitive formula multi-way valve of inlet and outlet throttling side energy |
| CN108506259A (en) * | 2018-04-09 | 2018-09-07 | 徐州燕大传动与控制技术有限公司 | A kind of load sensing formula multi-way valve of the inlet and outlet independent control of valve post-compensation |
| CN108412829B (en) * | 2018-04-09 | 2022-02-11 | 徐州燕大传动与控制技术有限公司 | Load sensitive type multi-way valve with independently adjustable inlet and outlet throttling edges |
| CN108506259B (en) * | 2018-04-09 | 2022-02-11 | 徐州燕大传动与控制技术有限公司 | Load sensing type multi-way valve with independently controlled inlet and outlet for valve post compensation |
| CN108661965A (en) * | 2018-05-28 | 2018-10-16 | 徐州燕大传动与控制技术有限公司 | A kind of 3 position-5 way load port independent control multi-way valve with Y type Median Functions |
| CN108716491A (en) * | 2018-05-28 | 2018-10-30 | 徐州燕大传动与控制技术有限公司 | A kind of 3 position-5 way load port independent control multi-way valve with O-shaped Median Function |
| CN109139598A (en) * | 2018-08-23 | 2019-01-04 | 江苏理工学院 | A kind of double valve-regulated load port separate control valves based on the compensation of machine hydraulic pressure difference |
| CN109083890A (en) * | 2018-08-23 | 2018-12-25 | 江苏理工学院 | A kind of assignment of traffic double valve-regulated load port separate control valves unrelated with load |
| CN108975188B (en) * | 2018-08-31 | 2020-07-17 | 武汉船用机械有限责任公司 | Hydraulic system |
| CN108975188A (en) * | 2018-08-31 | 2018-12-11 | 武汉船用机械有限责任公司 | A kind of hydraulic system |
| CN109630504A (en) * | 2018-12-26 | 2019-04-16 | 太原理工大学 | A kind of pressure compensated oil inlet and outlet autonomous control system of band |
| CN111022408A (en) * | 2020-01-06 | 2020-04-17 | 合肥工业大学 | Combination valve with return oil way compensation load sensing function |
| CN111594069A (en) * | 2020-05-19 | 2020-08-28 | 江苏理工学院 | Turnover type elevator control method based on load port independent control |
| CN111594069B (en) * | 2020-05-19 | 2021-08-24 | 江苏理工学院 | Turnover type elevator control method based on load port independent control |
| CN113107929A (en) * | 2021-04-15 | 2021-07-13 | 中国铁建重工集团股份有限公司 | Load-sensitive hydraulic circuit |
| CN116164003A (en) * | 2023-03-07 | 2023-05-26 | 浙江大学 | Load port independent control valve for distributed hydraulic system and control method thereof |
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