CN103573735B - Guide's heavy traffic load control valve of application displacement-force feedback principle - Google Patents
Guide's heavy traffic load control valve of application displacement-force feedback principle Download PDFInfo
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- CN103573735B CN103573735B CN201310564977.1A CN201310564977A CN103573735B CN 103573735 B CN103573735 B CN 103573735B CN 201310564977 A CN201310564977 A CN 201310564977A CN 103573735 B CN103573735 B CN 103573735B
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- 238000013016 damping Methods 0.000 claims abstract description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of guide's heavy traffic load control valve applying displacement-force feedback principle.Comprise main valve body, main valve housing, main valve plug, feedback spring, load pressure compensation damping, pilot valve, guide's valve pocket, control spring, control piston, guide valve blocks and end cap.This load control valve inside defines oil back chamber, load cavity, control sensitive cavity, hyperbaric chamber, pilot valve inner volume, draining chamber, and links up the passage of load cavity and hyperbaric chamber.For the hydraulic system that there is Exceed load, this load control valve can control load lowering velocity and effectively suppress the loading speed jitter problem of conventional load control valve.The impact of hydraulic power suffered by main valve plug is offset at the vibration damping tail of main valve plug head.The non-return valve function that the speed controlling function of load being transferred and load are risen is integrated on main valve plug and completes, and makes load control valve compact overall structure.The matching design of pilot valve and guide's valve pocket, makes load control valve have quick closedown function.
Description
Technical field
The present invention relates to hydraulic control component, especially relate to a kind of guide's heavy traffic load control valve applying displacement-force feedback principle.
Background technique
In the hydraulic system applications such as the machinery that such as hoists, hydraulic wireline winch and engineering machinery, often can occur the situation that load force direction is consistent with load movement direction, this kind of load is called as Exceed load (negative load).Bear the hydraulic system of Exceed load, need special control valve to control the flow of the hydraulic oil from load flow oil return source, when load flow is larger, this kind of control valve is commonly referred to as load control valve or equilibrium valve.
But because induced pressure is higher, loading condition is complicated, and the metering characteristics of load control valve directly determine speed control characteristic and the speed stability of hydraulic system.Conventional load control valve has that pilot pressure is high, the shortcoming of poor stability usually, load control valve becomes the bottleneck that restriction exists the hydraulic system performance of Exceed load, especially in heavy traffic load control valve field, the performance of load control valve directly affects a whole set of hydraulic system and then affects overall performance.
In view of this, application new principle, new method, the novel load control valve that development is applicable to the hydraulic system that there is large discharge Exceed load has important practical meaning in engineering.
Summary of the invention
In order to overcome in background technique there is Exceed load hydraulic system in load control valve or equilibrium valve loading speed control effects is poor, the deficiency of loading speed shake easily occurs, the object of the present invention is to provide a kind of guide's heavy traffic load control valve applying displacement-force feedback principle, this valve not only has good speed control characteristic, and main valve plug stability margin is large, effectively inhibit the shake of loading speed, be applicable to the hydraulic system that there is Exceed load.
The technical solution used in the present invention is:
The present invention includes main valve body, main valve housing, main valve plug, feedback spring, load pressure compensation damping, pilot valve, guide's valve pocket, control spring, control piston and guide valve blocks and end cap.
Main valve housing is installed in the cylindrical hole of main valve body, oil back chamber is formed bottom main valve housing and between main valve body opening, main valve plug small end passes main valve housing and is positioned at oil back chamber, the large end of main valve plug and main valve housing endoporus are for being slidably matched, one end of guide's valve pocket is installed in main valve body cylindrical hole, the other end of guide's valve pocket is installed in guide valve blocks cylindrical hole, the large end of pilot valve is placed in guide's valve pocket to be formed and is slidably matched, load pressure compensation damping is installed in the hole of the pilot valve of the large end in main valve plug side, one end of feedback spring is placed in bottom the hole of main valve plug, the other end of feedback spring is set on the large end stand shoulder of pilot valve, be bolted between guide valve blocks and main valve body, formed with guide valve blocks and be slidably matched in the cylindrical hole that control piston is placed in guide valve blocks, the small end of control piston withstands on the small end of the pilot valve through first guide pin bushing, one end of control spring withstands on bottom the cylindrical hole of guide valve blocks, and the other end of control spring withstands on control piston shoulder, and end cap is arranged on guide valve blocks by bolt, and pushes down the large end of control piston, control piston, guide valve blocks and end cap coordinate formation control chamber jointly, and the center of end cap is provided with control port X, and control port X is communicated with control chamber.
Main valve body is provided with return opening A and is communicated with oil back chamber, and main valve body is provided with load hydraulic fluid port B and is communicated with load cavity; In the middle part of main valve body cylindrical hole outside end large with main valve plug and main valve housing coordinate and form load cavity, oil back chamber is communicated with load cavity by valve port in the middle part of main valve plug; Guide's valve pocket central groove coordinates with main valve body cylindrical hole and forms hyperbaric chamber; Main valve plug cylindrical hole, main valve housing, formation control sensitive cavity between guide's valve pocket and the large end of pilot valve, control sensitive cavity to be communicated with load cavity by the large end rectangle groove of main valve plug, control sensitive cavity to be communicated with hyperbaric chamber by the large end valve mouth of pilot valve, control sensitive cavity and be communicated with pilot valve inner volume by load pressure compensation damping internal holes; Pilot valve cylindrical hole, load pressure compensation damping and guide's valve pocket coordinate formation pilot valve inner volume, and pilot valve inner volume is communicated with draining chamber by pilot valve small end valve port; Guide valve blocks coordinates with control piston and forms draining chamber, and the radial drain tap L of guide valve blocks is communicated with draining chamber.
Described pilot valve, main valve plug and control piston are coaxial, and pilot valve small end and main valve plug small end are for arrange in opposite directions.
Described main valve plug small end end is the boss structure of band fillet.
The beneficial effect that the present invention has is:
For existing in the hydraulic system of Exceed load, this load control valve can carry out the control of efficiently and accurately to load lowering velocity; Owing to applying displacement-force feedback principle, this load control valve has higher stability margin, stable loading speed can be provided to control, effectively inhibit the loading speed jitter problem of conventional load control valve.At main valve plug head design vibration damping stern construction, thus effectively offset the impact of hydraulic power suffered by main valve plug, further increase the stability of main valve plug.The non-return valve function that the speed controlling function of load being transferred and load are risen is integrated on main valve plug and completes, and makes load control valve compact overall structure.The matching design of pilot valve and guide's valve pocket, when pilot valve is closed, hyperbaric chamber is directly linked up with control sensitive cavity, thus control sensitive cavity pressure is raised rapidly, thus promotes main valve plug quick closedown, makes load control valve have quick closedown function.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is the sectional drawing of A-A in Fig. 1.
Fig. 3 is the structural drawing of main valve plug and vibration damping tail thereof in Fig. 1.
Fig. 4 is the partial enlarged view at B place in Fig. 1.
The phase diagram of Fig. 5 when to be that load rising load control valve is unidirectional open.
Fig. 6 is the phase diagram of load decline load control valve guide when opening.
In figure: 1, main valve body, 2, main valve housing, 3, main valve plug, 4, feedback spring, 5, load pressure compensation damping, 6, pilot valve, 7, guide's valve pocket, 8, control spring, 9, control piston, 10, guide valve blocks, 11, end cap, 12, oil back chamber, 13, load cavity, 14, control sensitive cavity, 15, passage, 16, hyperbaric chamber, 17, pilot valve inner volume, 18, draining chamber, 19, control chamber, 20, vibration damping tail.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes main valve body 1, main valve housing 2, main valve plug 3, feedback spring 4, load pressure compensation damping 5, pilot valve 6, guide's valve pocket 7, control spring 8, control piston 9 and guide valve blocks 10 and end cap 11.
As shown in Figure 1, main valve housing 2 is installed in the cylindrical hole of main valve body 1, oil back chamber 12 is formed bottom main valve housing 2 and between main valve body 1 hole, main valve plug 3 small end passes main valve housing 2 and is positioned at oil back chamber 12, main valve plug 3 is held with main valve housing 2 endoporus as being slidably matched greatly, one end of guide's valve pocket 7 is installed in main valve body 1 cylindrical hole, the other end of guide's valve pocket 7 is installed in guide valve blocks 10 cylindrical hole, serve the effect connecting guiding, pilot valve 6 is held greatly to be placed in guide's valve pocket 7 to be formed and is slidably matched, load pressure compensation damping 5 is installed in the hole of the pilot valve 6 of the large end in main valve plug side, one end of feedback spring 4 is placed in bottom the hole of main valve plug 3, the other end of feedback spring 4 is set on the large end stand shoulder of pilot valve 6, feedback spring 4 has certain initial compression amount, be connected by four interior hexagonal cylindrical hook bolts between guide valve blocks 10 with main valve body 1, to guarantee that guide's valve pocket 7 and main valve housing 2 to be pressed in main valve body 1 with main valve body 1 without relative movement, formed with guide valve blocks 10 and be slidably matched in the cylindrical hole that control piston 9 is placed in guide valve blocks 10, the small end of control piston 9 withstands on the small end of the pilot valve 6 through first guide pin bushing 7, one end of control spring 8 withstands on bottom the cylindrical hole of guide valve blocks 10, and the other end of control spring 8 withstands on control piston 9 shoulder, and control spring 8 has certain initial compression amount, end cap 11 is arranged on guide valve blocks 10 by four interior hexagonal cylindrical hook bolts, and pushes down the large end of control piston 9, control piston 9, guide valve blocks 10 and end cap 11 coordinate formation control chamber 19 jointly, and the center of end cap 11 is provided with control port X, and control port X is communicated with control chamber 19.
Main valve body 1 is provided with return opening A and is communicated with oil back chamber 12, and main valve body 1 is provided with load hydraulic fluid port B and is communicated with load cavity 13; Hold greatly with main valve plug 3 outside and main valve housing 2 to coordinate in the middle part of main valve body 1 cylindrical hole and form load cavity 13, oil back chamber 12 is communicated with load cavity 13 by valve port in the middle part of main valve plug 3; Guide's valve pocket 7 central groove coordinates with main valve body 1 cylindrical hole and forms hyperbaric chamber 16; Main valve plug 3 cylindrical hole, main valve housing 2, guide's valve pocket 7 and pilot valve 6 be formation control sensitive cavity 14 between end greatly, control sensitive cavity 14 to be communicated with load cavity 13 by the large end rectangle groove of main valve plug, control sensitive cavity 14 to be communicated with hyperbaric chamber 16 by the large end valve mouth of pilot valve, control sensitive cavity 14 and be communicated with pilot valve inner volume 17 by load pressure compensation damping 5 internal holes; Pilot valve 6 cylindrical hole, load pressure compensation damping 5 and guide's valve pocket 7 coordinate formation pilot valve inner volume 17, and pilot valve inner volume 17 is communicated with draining chamber 18 by pilot valve 6 small end valve port; Guide valve blocks 10 coordinates with control piston 9 and forms draining chamber 18, and the radial drain tap L of guide valve blocks 10 is communicated with draining chamber 18.
Described pilot valve 6, main valve plug 3 and control piston 9 are coaxial, and pilot valve 6 small end and main valve plug 3 small end are for arrange in opposite directions.
Described main valve plug 3 small end end is the boss structure of band fillet, is called vibration damping tail.Thus effectively offset the impact of hydraulic power suffered by main valve plug, improve the stability of main valve plug.
Connected by feedback spring 4 between main valve plug 3 and pilot valve 6, the aperture displacement of main valve plug 3 is made to feed back in pilot valve 6 with the form of spring force, increase the stability margin of main valve plug 3, obtain good speed control characteristic and effectively suppress loading speed shake.
Pilot valve 6 is equipped with load pressure compensation damping 5, achieves induced pressure when exceeding certain value, along with induced pressure increases, reduced by the hydraulic fluid flow rate of load control valve, the effect of the safety of proof load and hydraulic system.
The vibration damping tail 20 of main valve plug 3 head designs, can the effective hydraulic power of negative function on main valve plug 3, increases the stability of main valve plug 3 further.
By integrated for non-return valve function with on main valve plug 3, change the load of conventional load control valve and transfer non-return valve function that throttling function and load rise by two unaided designs of spool.
The matching design of pilot valve 6 and guide's valve pocket 7, when pilot valve 6 is closed, hyperbaric chamber 16 is directly linked up with control sensitive cavity 14, thus control sensitive cavity 14 pressure is raised rapidly, thus promote main valve plug 3 quick closedown, make load control valve have quick closedown function.
As shown in Figure 1, guide's heavy traffic load control valve of the present invention's application displacement-feedback principle mainly comprises main valve plug assembly, pilot valve assembly, control piston assembly and valve component.Main valve plug assembly comprises main valve plug 3, main valve housing 2 and feedback spring 4, main valve plug is placed in main valve housing, and can move vertically in main valve housing, feedback spring 4 one end withstands on the bottom of main valve plug endoporus, wherein main valve plug left end cavity volume 12 communicates with load control valve return opening A, in the middle part of main valve plug, ring-shaped chamber 13 communicates with load control valve load hydraulic fluid port B, and main valve plug right-hand member cavity volume is for controlling sensitive cavity 14; Pilot valve assembly is made up of pilot valve 6, guide's valve pocket 7, load pressure compensation damping 5 and feedback spring 4, pilot valve is placed in guide's valve pocket, and can move vertically in first guide valve bushing, load pressure compensation damping is installed on pilot valve afterbody by screw thread, feedback spring one end is enclosed within pilot valve afterbody ladder place, and withstand its convex shoulder, wherein load pressure compensation damping left end cavity volume is for controlling sensitive cavity 14, and load pressure compensation damping right-hand member cavity volume is pilot valve inner volume 17; Control piston assembly is made up of control piston 9 and control spring 8, control piston is placed in guide valve blocks cylindrical hole and can moves vertically wherein, control spring one end is withstood bottom guide valve blocks cylindrical hole, the other end to be enclosed within control piston and to withstand control piston, wherein control piston left end cavity volume 18 communicates with load control valve drain tap L, and control piston right-hand member cavity volume communicates with load control valve control port X; Valve component is made up of main valve body 1, guide valve blocks 10 and end cap 11, and main valve body is connected by 4 interior hexagonal cylindrical hook bolts with guide valve blocks, and end cap is connected by 4 interior hexagonal cylindrical hook bolts with guide valve blocks.
What Fig. 2 showed load control valve load hydraulic fluid port B and load cavity 13 is communicated with situation.
Fig. 3 shows the design of main valve plug head vibration damping tail, as shown in Figure 3, vibration damping tail is the band fillet boss structure of main valve plug head, when hydraulic oil flows out from valve port in the middle part of main valve plug, this vibration damping stern construction effectively can offset the hydraulic power suffered by main valve plug, thus adds the stability of main valve plug.
Fig. 4 show hyperbaric chamber 16 with control sensitive cavity 14 be communicated with situation, when pilot valve 6 is moved to the left, hyperbaric chamber 16 is blocked with control being communicated with of sensitive cavity 14, when pilot valve 6 sets back, hyperbaric chamber 16 is communicated with again with control sensitive cavity 14, and the pressure oil now in hyperbaric chamber enters and controls sensitive cavity 14, and the pressure controlling sensitive cavity 14 raises, thus promotion main valve plug 3 moves to the direction away from pilot valve 6, and then load control valve is closed.
When Figure 5 shows that load is risen, load control valve is as state during one-way valve opens, now hydraulic oil enters load control valve from A mouth, promote main valve plug 3 compressed feedback spring 4 to move to pilot valve 6 direction, valve port is opened, and hydraulic oil enters load cavity 13 through valve port, and then flows out from B mouth, when load control valve is as one-way valve opens, pilot valve 6, that control piston 9 is in original position is motionless.
When Figure 6 shows that load declines, state when load control valve guide opens, first, pilot control oil enters control chamber 19 from control port X, promote control piston 9 compression control spring 8 to move to main valve plug 3 direction, under the promotion of control piston 9, pilot valve 6 also moves to main valve plug 3 direction, poppet port between pilot valve 6 and guide's valve pocket 7 is opened, link up pilot valve inner volume 17 and draining chamber 18, pilot valve inner volume 17 pressure reduces, be connected by load pressure compensation damping 5 with pilot valve inner volume 17 owing to controlling sensitive cavity 14, reduce so control sensitive cavity 14 pressure, main valve plug 3 stress balance is broken, main valve plug 3 moves to pilot valve 6 direction, primary valve is opened, the pressure oil of B mouth is by load cavity 13, primary valve enters oil back chamber 12, and then flow out from load control valve A mouth, the movement of main valve plug 3 makes feedback spring 4 decrement increase, spring force increases, the stressed of pilot valve 6 is broken again, pilot valve 6 moves to away from main valve plug 3 direction, poppet port turns down, the pressure of pilot valve inner volume 17 and control sensitive cavity 14 raises, main valve plug 3 stop motion, until main valve plug 3 and pilot valve 6 all reach stress balance, thus the displacement reaching main valve plug 3 feeds back to the effect of pilot valve 6 with the form of spring force.
Claims (3)
1. apply guide's heavy traffic load control valve of displacement-force feedback principle, it is characterized in that: comprise main valve body (1), main valve housing (2), main valve plug (3), feedback spring (4), load pressure compensation damping (5), pilot valve (6), guide's valve pocket (7), control spring (8), control piston (9) and guide valve blocks (10) and end cap (11), main valve housing (2) is installed in the cylindrical hole of main valve body (1), oil back chamber (12) is formed between main valve housing (2) bottom and main valve body (1) hole, main valve plug (3) small end passes main valve housing (2) and is positioned at oil back chamber (12), main valve plug (3) is held with main valve housing (2) endoporus as being slidably matched greatly, one end of guide's valve pocket (7) is installed in main valve body (1) cylindrical hole, the other end of guide's valve pocket (7) is installed in guide valve blocks (10) cylindrical hole, pilot valve (6) is held greatly to be placed in guide's valve pocket (7) to be formed and is slidably matched, load pressure compensation damping (5) is installed in the hole of the pilot valve (6) of the large end in main valve plug (3) side, one end of feedback spring (4) is placed in bottom the hole of main valve plug (3), the other end of feedback spring (4) is set on the large end stand shoulder of pilot valve (6), be bolted between guide valve blocks (10) and main valve body (1), formed with guide valve blocks (10) and be slidably matched in the cylindrical hole that control piston (9) is placed in guide valve blocks (10), the small end of control piston (9) withstands on the small end of the pilot valve (6) through guide's valve pocket (7), one end of control spring (8) withstands on bottom the cylindrical hole of guide valve blocks (10), the other end of control spring (8) withstands on control piston (9) shoulder, end cap (11) is arranged on guide valve blocks (10) by bolt, and pushes down the large end of control piston (9), control piston (9), guide valve blocks (10) and end cap (11) coordinate formation control chamber (19) jointly, and the center of end cap (11) is provided with control port X, and control port X is communicated with control chamber (19),
Main valve body (1) is provided with return opening A and is communicated with oil back chamber (12), and main valve body (1) is provided with load hydraulic fluid port B and is communicated with load cavity (13); Hold greatly with main valve plug (3) outside and main valve housing (2) to coordinate in the middle part of main valve body (1) cylindrical hole and form load cavity (13), oil back chamber (12) is communicated with load cavity (13) by main valve plug (3) middle part valve port; Guide's valve pocket (7) central groove coordinates with main valve body (1) cylindrical hole and forms hyperbaric chamber (16); Main valve plug (3) cylindrical hole, main valve housing (2), guide's valve pocket (7) and pilot valve (6) be formation control sensitive cavity (14) between end greatly, controlling sensitive cavity (14) holds greatly rectangle groove to be communicated with load cavity (13) by main valve plug (3), control sensitive cavity (14) to be communicated with hyperbaric chamber (16) by the large valve port held of pilot valve (6), control sensitive cavity (14) and be communicated with pilot valve inner volume (17) by load pressure compensation damping (5) internal holes; Pilot valve (6) cylindrical hole, load pressure compensation damping (5) and guide's valve pocket (7) coordinate formation pilot valve inner volume (17), and pilot valve inner volume (17) is communicated with draining chamber (18) by pilot valve (6) small end valve port; Guide valve blocks (10) coordinates with control piston (9) and forms draining chamber (18), and the radial drain tap L of guide valve blocks (10) is communicated with draining chamber (18).
2. a kind of guide's heavy traffic load control valve applying displacement-force feedback principle according to claim 1, it is characterized in that: described pilot valve (6), main valve plug (3) and control piston (9) are coaxial, and pilot valve (6) small end and main valve plug (3) small end are for arrange in opposite directions.
3. a kind of guide's heavy traffic load control valve applying displacement-force feedback principle according to claim 1, is characterized in that: described main valve plug (3) small end end is the boss structure of band fillet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310564977.1A CN103573735B (en) | 2013-11-14 | 2013-11-14 | Guide's heavy traffic load control valve of application displacement-force feedback principle |
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| CN201310564977.1A CN103573735B (en) | 2013-11-14 | 2013-11-14 | Guide's heavy traffic load control valve of application displacement-force feedback principle |
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| CN103573735A CN103573735A (en) | 2014-02-12 |
| CN103573735B true CN103573735B (en) | 2015-09-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104358728B (en) * | 2014-11-04 | 2016-05-04 | 浙江大学 | Relief function is integrated in to the secondary loads control valve of guide's spool |
| CN104747523B (en) * | 2015-04-02 | 2017-03-15 | 武汉船用机械有限责任公司 | A kind of lowering velocity limits hydraulic control valve |
| CN106122142B (en) * | 2016-06-24 | 2018-08-17 | 平高集团有限公司 | Integrated form hydraulic control one-way valve |
| CN112253558B (en) * | 2020-10-20 | 2021-09-17 | 浙江大学 | Load control valve integrating large-flow overflow function into main valve core |
| CN112431806B (en) * | 2020-10-20 | 2021-09-17 | 浙江大学 | Pilot high-flow load control valve with back pressure compensation function |
| CN112253570B (en) * | 2020-10-20 | 2021-09-17 | 浙江大学 | Plug-in pilot high-flow load control valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS56107956A (en) * | 1980-01-30 | 1981-08-27 | Hitachi Ltd | Solenoid fuel injection valve |
| JP3712573B2 (en) * | 1999-11-25 | 2005-11-02 | シーケーディ株式会社 | Chemical valve |
| CN1355391A (en) * | 2001-12-13 | 2002-06-26 | 浙江大学 | Low-noise overflow valve with shaped flow channel |
| CN1276189C (en) * | 2004-08-04 | 2006-09-20 | 浙江大学 | Pure water unloading overflow valve |
| CN1271339C (en) * | 2004-08-04 | 2006-08-23 | 浙江大学 | Leakless plane type pure water electrohydraulic change valve |
| CN201155498Y (en) * | 2008-01-21 | 2008-11-26 | 浙江圣邦机械有限公司 | Integrated one-way balance valve |
| CN203548397U (en) * | 2013-11-14 | 2014-04-16 | 浙江大学 | Pilot high-flow load control valve based on displacement-force feedback principle |
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