CN104776077A - Load-sensitive multiway valve with micromotion valve element - Google Patents
Load-sensitive multiway valve with micromotion valve element Download PDFInfo
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- CN104776077A CN104776077A CN201510062761.4A CN201510062761A CN104776077A CN 104776077 A CN104776077 A CN 104776077A CN 201510062761 A CN201510062761 A CN 201510062761A CN 104776077 A CN104776077 A CN 104776077A
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- valve
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- fine motion
- spool
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention provides a load-sensitive multiway valve with a micromotion valve element. The load-sensitive multiway valve with the micromotion valve element comprises at least one valve body, wherein the valve body is provided with one group or multiple groups of valve blocks and an oil inlet hole; two ends of the valve body are respectively provided with a control end cover and a control piston end cover; each valve block comprises a main valve element hole, a micromotion valve element hole, a compensation valve element hole, an oil inlet path, a multiway valve oil inlet cavity, a plurality of oil outlet holes and oil leakage holes; a main valve element, a micromotion valve element and a compensation valve element are respectively installed in each main valve element hole, each micromotion valve element hole and each compensation valve element hole; each he oil inlet path is communicated with the corresponding oil inlet hole of the valve body and is communicated with a multiway valve oil inlet cavity via the corresponding compensation valve element hole; each multiway valve oil inlet cavities are communicated with the oil outlet holes and the oil leakage holes via the main valve element holes and the micromotion valve element holes. The load-sensitive multiway valve is provided with the micromotion valve elements, so that the load-sensitive multiway valve has the advantages of better multiway valve micromotion performance and convenience in the small-flow regulation of a system, system pressure loss is reduced, and an energy use ratio is improved. According to the load-sensitive multiway valve, the processing of a valve element throttling groove is reduced, and the difficulty of a processing technology is lowered.
Description
Technical field
The present invention relates to a kind of multi-way valve, especially relate to a kind of load sensing multi-way valve with fine motion spool.
Background technique
Along with the development of modern hydraulic technology and the more harsh of field requirement, make engineering machinery field just towards the future development of precision, tranquilization.Adopt the hydraulic system of load-sensitive technology to decrease series flow control valve class component, level of integration is high, and the step-less adjustment of feasible system executive component speed, widen flow system flow regulation range, and regulating accurately, process is steady, and it is widely used in engineering machinery field.
In hydraulic system, often require the flow rate fine-tuning stage, to realize accurately steadily locating of system executive component.The hydraulic system multi-way valve with load-sensitive characteristic carrys out accuracy-control system uninterrupted by spool amount of movement, and the quality of its fretting performance directly affects accuracy and the stationarity of flow system flow adjustment.Existing multi-way valve is usually through the mode control system Flow characteristics driving combination throttling groove at spool, and this method exists significantly not enough: combination throttling groove adds the difficulty of spool processing technology, high expensive; Throttling groove makes system pressure loss large, and energy consume is high.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the load sensing multi-way valve that a kind of structure simply has fine motion spool, the present invention have fretting performance good, control accurately and the advantage such as difficulty of processing is little.
The technical solution used in the present invention is: comprise at least one valve body; Valve body is provided with one or more groups valve block and oil inlet hole; The two ends of described valve body are provided with and control end cap and control piston end cap;
Described valve block comprises main valve core bore, inching valve core bore, recuperation valve core bore, oil inlet passage, multi-way valve oil suction chamber, multiple oil outlet and oil leak hole; Described main valve core bore, inching valve core bore and recuperation valve core bore are set in parallel on valve body; Main valve plug, fine motion spool and compensating spool is separately installed with in main valve core bore, inching valve core bore and recuperation valve core bore; Corresponding to the main valve plug on valve body and fine motion spool, main valve plug piston hole and fine motion spool piston hole on control piston end cap, main valve plug piston hole and fine motion spool piston hole tail end are by pipeline communication, and pipeline is provided with the first control port; The main valve plug control piston of main valve plug is positioned at main valve plug piston hole, and the fine motion spool control piston of fine motion spool is positioned at fine motion spool piston hole; Corresponding to the main valve plug on valve body and fine motion spool, control end covers and is provided with main valve plug control hole and fine motion spool control hole, and the tail end of main valve plug control hole and fine motion spool control hole is by pipeline communication, and pipeline is provided with the second control port; The end of main valve plug is positioned at main valve plug control hole, and the end of fine motion spool is positioned at fine motion spool control hole; Oil inlet passage is communicated with the oil inlet hole of valve body, and oil inlet passage is communicated with multi-way valve oil suction chamber by compensating valve opening, and multi-way valve oil suction chamber is communicated with oil leak hole with multiple oil outlet with inching valve core bore by main valve core bore.
Above-mentioned has in the load sensing multi-way valve of fine motion spool, comprise multiple valve body and base plate, the oil inlet hole of described valve body is through hole, described multiple valve body and base plate are connected by screw, seal between adjacent valve body and between valve body and base plate, base plate is arranged on the face at filler opening place of oil inlet hole on valve body.
Above-mentioned has in the load sensing multi-way valve of fine motion spool, and corresponding to compensating spool, control end covers and is provided with adjusting screw, and the end of adjusting screw contacts with the spring terminal of compensating spool; Recuperation valve core bore is provided with screw plug towards control piston end cap end.
Above-mentioned has in the load sensing multi-way valve of fine motion spool, described valve block, and the spring place corresponding to compensating spool is provided with overflow hole, and overflow hole is communicated with recuperation valve core bore; Be provided with relief valve in overflow hole, corresponding to relief valve, valve body is provided with relief valve adjusting screw.
Above-mentioned has in the load sensing multi-way valve of fine motion spool, described often group valve block is provided with two oil outlets and two oil leak hole, two oil leak hole are arranged near the two ends of valve body respectively, two oil outlets between two oil leak hole, the both sides of multi-way valve oil suction chamber.
Compared with prior art, the invention has the beneficial effects as follows:
Fine motion spool of the present invention and main valve plug adopt parallel-connection structure, and the working oil path of fine motion spool and main valve plug, in-line and oil circuit share, and structure is simple; The diameter of fine motion spool of the present invention is about 1/3rd of main valve plug diameter, in the system micro-positioning regulators stage, by moving axially of fine motion spool, to realize the fine adjustment of flow system flow; In the system large discharge stage, by the acting in conjunction of fine motion spool and main valve plug, meet flow system flow requirement, therefore the present invention is applicable to large discharge occasion, meets the scope that flow system flow regulates; The present invention is provided with fine motion spool, makes multi-way valve fretting performance better, is convenient to system small flow and regulates; And reduce system pressure loss, improve energy utilization rate; Compared with existing multi-way valve, The present invention reduces the processing of throttling spool groove, reduce processing technology difficulty of the present invention.
Accompanying drawing explanation
Fig. 1 is top view of the present invention.
Fig. 2 is the D-D sectional drawing in Fig. 1.
Wherein: 1. valve body, 2. main valve core bore, 3. main valve plug, 4. main valve plug piston, 5. fine motion valve core piston, 6. control piston end cap, 7. fine motion spool, 8. screw plug, 9. oil inlet passage, 10. compensating spool, 11. multi-way valve oil suction chambers, 12. relief valves, 13. relief valve adjusting screw, 14. recuperation valve control pistons, 15. recuperation valve adjusting screw, 16. inching valve core bore, 17. control end cap.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, 2, the present invention includes two valve bodies 1, base plate and top board, described valve body 1 is provided with oil inlet hole and two groups of valve blocks, oil inlet hole is through hole, described two valve bodies 1, base plate and top board are connected by screw, and two valve bodies 1 are between base plate and top board, and the oil inlet hole of two valve bodies 1 is communicated with; Base plate and sealing between top board and valve body 1, seals between two valve bodies 1.Described base plate and mounting of roof plate are on the face at the filler opening place of the oil inlet hole 1-7 of two valve bodies 1.The oil inlet hole described top board corresponding to valve body 1 is provided with oil inlet hole.The two ends of valve body 1 are respectively equipped with and control end cap 17 and control piston end cap 6.
As shown in Figure 2, described often group valve block comprises main valve core bore 2, inching valve core bore 16, recuperation valve core bore 1-4, oil inlet passage 9, multi-way valve oil suction chamber 11, two oil outlet 1-2 and two oil leak hole 1-3; Described main valve core bore 2, inching valve core bore 16 and recuperation valve core bore 1-4 are set in parallel on valve body 1; Be separately installed with main valve plug 3, fine motion spool 7 and compensating spool 10 in main valve core bore 2, inching valve core bore 16 and recuperation valve core bore 1-4, the diameter of main valve plug 3 is 22mm, and the diameter of fine motion spool 7 is 7mm.The stroke of main valve plug 3 and fine motion spool 7 is all 8mm.Main valve plug 3 cracking pressure is 0.5MPa, and the cracking pressure of fine motion spool 7 is 0.2MPa.
Corresponding to the main valve plug 3 on valve body 1 and fine motion spool 7, main valve plug piston hole 6-1 and fine motion spool piston hole 6-2 on control piston end cap 6, main valve plug piston hole 6-1 and fine motion spool piston hole 6-2 tail end are by pipeline communication, and pipeline is provided with the first control port 6-3; The main valve plug piston 4 of main valve plug 3 is positioned at main valve plug piston hole 6-1, and the fine motion spool control piston 5 of fine motion spool 7 is positioned at fine motion spool piston hole 6-2.
Corresponding to the main valve plug 3 on valve body 1 and fine motion spool 7, control end cap 17 and be provided with main valve plug control hole 17-1 and fine motion spool control hole 17-2, the tail end of main valve plug control hole 17-1 and fine motion spool control hole 17-2 is by pipeline communication, and pipeline is provided with the second control port 17-3; The end of main valve plug 3 is positioned at main valve plug control hole 17-1, and the end of fine motion spool 7 is positioned at fine motion spool control hole 17-2.
Described oil inlet passage 9 is communicated with the oil inlet hole of valve body 1, and oil inlet passage 9 is communicated with multi-way valve oil suction chamber 11 by compensating valve opening, and multi-way valve oil suction chamber 11 is communicated with two oil leak hole 1-3 with two oil outlet 1-2 with inching valve core bore 16 by main valve core bore 2.Two oil leak hole 1-3 are arranged near the two ends of valve body 1 respectively, two oil outlet 1-2 between two oil leak hole 1-3, the both sides of multi-way valve oil suction chamber 11.
Corresponding to compensating spool 10, control end cap 17 and be provided with adjusting screw 15, the end of adjusting screw 15 contacts with the recuperation valve control piston 14 of compensating spool 10; Recuperation valve core bore 1-4 is provided with screw plug 8 towards one end of control piston end cap 6.Spring place corresponding to compensating spool 10 is provided with overflow hole, and overflow hole is communicated with recuperation valve core bore 1-4; Be provided with relief valve 12 in overflow hole, corresponding to relief valve 12, valve body is provided with relief valve adjusting screw 13.
Specific works principle of the present invention is as follows:
Fluid enters oil inlet passage 9 through oil inlet hole, then after pressure compensation spool 10 reduces pressure, enters multi-way valve oil suction chamber 11, and when the two ends of main valve plug 3 and fine motion spool 7 are all without when controlling fluid, main valve plug 3 and fine motion spool 7 are placed in meta, the obstructed oil of two oil outlet 1-2.
When the first control port 6-3 of left end of the present invention leads to pressure oil, fluid enters the left chamber of main valve plug 3 and fine motion spool 7 through the first control port 6-3, now has two kinds of situations:
If when the present invention needs micro-positioning regulators, pilot pressure is greater than 0.2MPa, is less than 0.5MPa, and namely it is enough to overcome fine motion spool 7 spring force and be less than main valve plug 3 spring force.Now, fine motion spool 7 overcomes its spring force and moves to right, and fluid is connected from multi-way valve oil suction chamber 11 through the oil outlet of fine motion spool 7 with the right, and the oil outlet on the left side is connected by the oil leak hole on inching valve core bore and the right.Because fine motion spool 7 diameter only has 7mm, make to flow through spool and enter the fluid flow of the right oil outlet seldom, and then realize the fine setting of flow system flow.
If when system needs high flow rate oil supply, when namely pilot pressure is greater than 0.5MPa.Now, main valve plug 3 overcomes its spring force and moving to right separately together with fine motion spool 7, and fluid is connected with the oil outlet on the right from multi-way valve oil suction chamber 11 through fine motion spool 7 and main valve plug 3, and the oil outlet on the left side and the oil leak hole on the left side are connected.Because main valve plug 3 diameter is comparatively large, and its action together with fine motion spool 7, system large discharge demand can be met.
Because two kinds of situations are at feedback load pressure, principle when realizing pressure compensation is consistent, now only by the action specification of fine motion spool 7: when fine motion spool 7 moves to right, a fluid part for multi-way valve oil suction chamber 11 enters the oil outlet on the right through fine motion spool 7, a part feeds back to compensating spool 10 spool left end through compensating spool 10 spool bore.Now, induced pressure oil flows into load feedback oil duct by the spool bore of oil outlet on the right side of fine motion spool 7 on the right, then through external oil pipe and feedback pressure oil external oil pipe joint, flows into compensating spool 10 spring chamber.Compensating spool 10 is in state of equilibrium under oil suction chamber pressure, induced pressure and itself spring force acting in conjunction, and from equilibrium relation, the difference of oil suction chamber pressure and induced pressure is definite value, and namely before and after fine motion spool 7, pressure reduction is definite value.From flow formula, when pressure reduction is certain, the flow flowing through fine motion spool 7 is directly proportional to spool travel.Now, just by the size of regulable control oil pressure to realize the fine adjustment of flow system flow.The adjustment to pressure reduction before and after spool is realized by the adjusting screw 15 of adjustment compensating spool 10.On the load feedback oil circuit of spring chamber entering compensating spool 10, devise relief valve 12, to control to feed back oil liquid pressure, its oil pressure relief regulates by relief valve adjusting screw 13.
When the second control port 17-3 of system right-hand member leads to pressure oil, fluid enters the right-hand member of main valve plug 3 and fine motion spool 7 through the second control port 17-3, now also has two kinds of situations:
If when system needs micro-positioning regulators, pilot pressure is greater than 0.2MPa, is less than 0.5MPa, namely it is enough to overcome the spring force of fine motion spool 7 and is less than the spring force of main valve plug 3.Now, fine motion spool 7 overcomes its spring force and moves to left, and fluid is connected from multi-way valve oil suction chamber 11 through the oil inlet hole of fine motion spool 7 with the left side, and the oil inlet hole on the right is connected with the oil leak hole by inching valve core bore and the right.Because fine motion spool 7 only has 7mm, make to flow through spool and enter the fluid flow of left side oil inlet hole seldom, and then realize the fine setting of flow system flow.
If when system needs high flow rate oil supply, when namely pilot pressure is greater than 0.5MPa.Now, main valve plug 3 overcomes its spring force and moving to left separately together with fine motion spool 7, and fluid is connected with the oil inlet hole on the left side from multi-way valve oil suction chamber 11 through fine motion spool 7 and main valve plug 3, and the oil inlet hole on the right and oil leak hole are connected.Because main valve plug 3 diameter is comparatively large, and its action together with fine motion spool 7, system large discharge demand can be met.
Implementation when pressure compensated implementation moves to right with spool is consistent, by feeding back the induced pressure of the oil inlet hole on the left side, before and after keeping main valve plug 3 or fine motion spool 7, pressure reduction is constant, so that realize flow system flow fine adjustment, reduce hydraulic system series flow control valve class component quantity, reduce costs, reduce and leak.
Claims (7)
1. there is a load sensing multi-way valve for fine motion spool, comprise at least one valve body; Valve body is provided with one or more groups valve block and oil inlet hole; The two ends of described valve body are provided with and control end cap and control piston end cap;
Described valve block comprises main valve core bore, inching valve core bore, recuperation valve core bore, oil inlet passage, multi-way valve oil suction chamber, multiple oil outlet and oil leak hole; Described main valve core bore, inching valve core bore and recuperation valve core bore are set in parallel on valve body; Main valve plug, fine motion spool and compensating spool is separately installed with in main valve core bore, inching valve core bore and recuperation valve core bore; Corresponding to the main valve plug on valve body and fine motion spool, main valve plug piston hole and fine motion spool piston hole on control piston end cap, main valve plug piston hole and fine motion spool piston hole tail end are by pipeline communication, and pipeline is provided with the first control port; The main valve plug control piston of main valve plug is positioned at main valve plug piston hole, and the fine motion spool control piston of fine motion spool is positioned at fine motion spool piston hole; Corresponding to the main valve plug on valve body and fine motion spool, control end covers and is provided with main valve plug control hole and fine motion spool control hole, and the tail end of main valve plug control hole and fine motion spool control hole is by pipeline communication, and pipeline is provided with the second control port; The end of main valve plug is positioned at main valve plug control hole, and the end of fine motion spool is positioned at fine motion spool control hole; Oil inlet passage is communicated with the oil inlet hole of valve body, and oil inlet passage is communicated with multi-way valve oil suction chamber by compensating valve opening, and multi-way valve oil suction chamber is communicated with oil leak hole with multiple oil outlet with inching valve core bore by main valve core bore.
2. the load sensing multi-way valve with fine motion spool according to claim 1, it is characterized in that: comprise multiple valve body and base plate, the oil inlet hole of described valve body is through hole, described multiple valve body and base plate are connected by screw, seal between adjacent valve body and between valve body and base plate, base plate is arranged on the face at filler opening place of oil inlet hole on valve body.
3. the load sensing multi-way valve with fine motion spool according to claim 1 and 2, is characterized in that: corresponding to compensating spool, and control end covers and is provided with adjusting screw, and the end of adjusting screw contacts with the spring terminal of compensating spool; Recuperation valve core bore is provided with screw plug towards control piston end cap end.
4. the load sensing multi-way valve with fine motion spool according to claim 1 and 2, is characterized in that: described valve block, the spring place corresponding to compensating spool is provided with overflow hole, and overflow hole is communicated with recuperation valve core bore; Be provided with relief valve in overflow hole, corresponding to relief valve, valve body is provided with relief valve adjusting screw.
5. the load sensing multi-way valve with fine motion spool according to claim 1 and 2, it is characterized in that: described often group valve block is provided with two oil outlets and two oil leak hole, two oil leak hole are arranged near the two ends of valve body respectively, two oil outlets between two oil leak hole, the both sides of multi-way valve oil suction chamber.
6. the load sensing multi-way valve with fine motion spool according to claim 1 and 2, is characterized in that: the diameter of described main valve plug is 22mm, and the diameter of fine motion spool is 7mm, and spool stroke is all 8mm.
7. the load sensing multi-way valve with fine motion spool according to claim 1 and 2, is characterized in that: main valve plug cracking pressure is 0.5MPa, and the cracking pressure of fine motion spool is 0.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510062761.4A CN104776077B (en) | 2015-02-06 | 2015-02-06 | Load-sensitive multiway valve with micromotion valve element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510062761.4A CN104776077B (en) | 2015-02-06 | 2015-02-06 | Load-sensitive multiway valve with micromotion valve element |
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| Publication Number | Publication Date |
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| CN104776077A true CN104776077A (en) | 2015-07-15 |
| CN104776077B CN104776077B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510062761.4A Active CN104776077B (en) | 2015-02-06 | 2015-02-06 | Load-sensitive multiway valve with micromotion valve element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109131550A (en) * | 2018-09-05 | 2019-01-04 | 芜湖中意液压科技股份有限责任公司 | A kind of adjustable Flow amplification hydraulic steering gear of discharge capacity |
| CN111963506A (en) * | 2020-08-07 | 2020-11-20 | 太原理工大学 | Multi-way valve of double-valve-core crane capable of accurately controlling micro flow |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2245017A1 (en) * | 1972-09-14 | 1974-04-11 | Reinhard Kucharzyk | PRE-CONTROLLED AND REMOTE CONTROLLED HYDRAULIC, SELF-CONTROLLING DIRECTIONAL VALVE, ALSO SUITABLE FOR GAS MEDIA |
| US4617854A (en) * | 1983-06-14 | 1986-10-21 | Linde Aktiengesellschaft | Multiple consumer hydraulic mechanisms |
| CN202851491U (en) * | 2012-09-19 | 2013-04-03 | 浙江高宇液压机电有限公司 | Load-sensitive multi-way valve used in loader variable system |
| CN202913450U (en) * | 2012-11-16 | 2013-05-01 | 浙江高宇液压机电有限公司 | Pressure compensator used for loader |
| CN203822733U (en) * | 2014-03-28 | 2014-09-10 | 四川长江液压件有限责任公司 | Full load sensitive multitandem valve used for caterpillar crane |
-
2015
- 2015-02-06 CN CN201510062761.4A patent/CN104776077B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2245017A1 (en) * | 1972-09-14 | 1974-04-11 | Reinhard Kucharzyk | PRE-CONTROLLED AND REMOTE CONTROLLED HYDRAULIC, SELF-CONTROLLING DIRECTIONAL VALVE, ALSO SUITABLE FOR GAS MEDIA |
| US4617854A (en) * | 1983-06-14 | 1986-10-21 | Linde Aktiengesellschaft | Multiple consumer hydraulic mechanisms |
| CN202851491U (en) * | 2012-09-19 | 2013-04-03 | 浙江高宇液压机电有限公司 | Load-sensitive multi-way valve used in loader variable system |
| CN202913450U (en) * | 2012-11-16 | 2013-05-01 | 浙江高宇液压机电有限公司 | Pressure compensator used for loader |
| CN203822733U (en) * | 2014-03-28 | 2014-09-10 | 四川长江液压件有限责任公司 | Full load sensitive multitandem valve used for caterpillar crane |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109131550A (en) * | 2018-09-05 | 2019-01-04 | 芜湖中意液压科技股份有限责任公司 | A kind of adjustable Flow amplification hydraulic steering gear of discharge capacity |
| CN109131550B (en) * | 2018-09-05 | 2021-05-07 | 芜湖中意液压科技股份有限责任公司 | Displacement-adjustable flow amplification hydraulic steering gear |
| CN111963506A (en) * | 2020-08-07 | 2020-11-20 | 太原理工大学 | Multi-way valve of double-valve-core crane capable of accurately controlling micro flow |
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| Publication number | Publication date |
|---|---|
| CN104776077B (en) | 2017-02-22 |
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