CN102678649A - Half integral load-sensing multiway valve - Google Patents
Half integral load-sensing multiway valve Download PDFInfo
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- CN102678649A CN102678649A CN2012101876220A CN201210187622A CN102678649A CN 102678649 A CN102678649 A CN 102678649A CN 2012101876220 A CN2012101876220 A CN 2012101876220A CN 201210187622 A CN201210187622 A CN 201210187622A CN 102678649 A CN102678649 A CN 102678649A
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- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- 210000000481 breast Anatomy 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 160
- 239000000446 fuel Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The invention discloses a half integral load-sensing multiway valve comprising an oil inlet linkage valve body assembly. The oil inlet linkage valve body assembly is sequentially connected with a front valve body assembly, a rear valve body assembly and a tailstock, and an oil inlet cavity, an oil return cavity and a pressure feedback cavity of the oil inlet linkage valve body assembly are communicated with the oil inlet cavities, the oil return cavities and the pressure feedback cavities of the front valve body assembly and the rear valve body assembly. The half integral load-sensing multiway valve has the characteristics of compact structure, high reliability, energy conservation and antisaturation performance.
Description
Technical field
The present invention relates to a kind of semi-monolithic formula load sensing multi-way valve, belong to the multi-way valve field.
Background technique
Multi-way valve is the vitals of excavator hydraulic system; It forms the major component of excavator hydraulic system, has confirmed fuel feeding route and the fuel system of oil hydraulic pump to each hydraulic pressure element, the assignment of traffic during hydraulic pressure element composite move; Kinology and dynamic (dynamical) characteristic when having determined excavator operation; Action is preferential and cooperate, interflow fuel feeding and straight line moving etc., and can its design considerations be satisfy better that excavator operation requires and working condition requirement.Traditional mini-excavator load sensing multi-way valve adopts the structural type of multi-disc stack and upstream pressure compensation more, and the valve block combine and assemble that is about to the multi-disc difference in functionality is arranged on the changeover valve core front end together and with the pressure compensation spool, and shortcoming is to produce bigger coupling mechanism force at each junction plane place; Cause the main valve hole distortion bigger; Cause the spool clamping stagnation, simultaneously oil leakage fault takes place in each valve block junction plane place easily, and is that the traffic demand of executive component no longer has the assignment of traffic function during greater than the oil hydraulic pump fuel delivery when system's generation is saturated; The oil of oil hydraulic pump is according to the negative size of cutting; Flow to the minimum executive component of pressure, the executive component with high capacity pressure will reduce operating rate, until stop motion; Do not possess the anti-saturation function, this obviously can not satisfy the job requirement of hydraulic shovel.
Summary of the invention
The actuator of respectively working when the objective of the invention is to solve flow that work actuator requires greater than the limit flow of pump realizes the problem of composite move, and the semi-monolithic formula load sensing multi-way valve that a kind of compact structure, reliability are high, energy-conservation, have the anti-saturation function is provided.
In order to achieve the above object; The invention provides a kind of semi-monolithic formula load sensing multi-way valve; It is characterized in that; Comprise that oil-feed joins valve body assembly, oil-feed joins valve body assembly and links to each other successively with front valve shell assembly, rear valve body assembly, tailstock, and oil-feed joins oil suction chamber, oil back chamber, the pressure feedback chamber of valve body assembly and all connects with oil suction chamber, oil back chamber, the pressure feedback chamber of front valve shell assembly, rear valve body assembly.
Preferably, described oil-feed joins valve body assembly and comprises that oil-feed joins valve body, is provided with meta off-load spool in the oil-feed couplet valve body; Described oil suction chamber is connected with oil back chamber through meta off-load spool, and meta off-load spool separates oil suction chamber, oil back chamber and pressure control cavity simultaneously, and an end of meta off-load spool is provided with screw plug; The other end of meta off-load spool is provided with the spring bracing ring; The spring bracing ring leans against on the control spring, and control spring is arranged on the bottom and is provided with in the spring seat of spacer, is provided with main relief valve in the pressure control cavity; Pressure control cavity and pressure feedback chamber are provided with the pressure compensation unloading valve through pressure control adapter cavity UNICOM in the pressure control adapter cavity.
Preferably; Described front valve shell assembly comprises front valve shell; Front valve shell is walked work couplet oil circuit by swing arm work couplet oil circuit, scraper bowl work couplet oil circuit, dipper work couplet oil circuit and left lateral and is integrated in an integral body; Described rear valve body assembly comprises rear valve body; Rear valve body is walked work couplet oil circuit, subsequent use work couplet oil circuit, dozer work couplet oil circuit and revolution work couplet oil circuit by right lateral and is integrated in an integral body; Swing arm work joins oil circuit, scraper bowl work and joins oil circuit, dipper work and join oil circuit and subsequent use work and join that oil circuit, dozer work join oil circuit, revolution work joins oil circuit and has identical valve A type oil pocket structure, and left lateral is walked work and joined oil circuit and walk work couplet oil circuit with right lateral and have identical valve B type oil pocket structure.
Preferably; Described valve A type oil pocket structure comprises oil suction chamber; Oil suction chamber and pressure compensation spool ante-chamber, adapter cavity, active chamber respectively with first changeover valve core on pairing logical oil groove be connected; Respectively there is a seal arrangement at the two ends of first changeover valve core; Be provided with the pressure compensation spool behind first changeover valve core, pressure compensation spool back cavity and adapter cavity place, valve body both sides respectively are provided with an one-way valve, and the active chamber that swing arm work joins oil circuit, scraper bowl work couplet oil circuit, dipper work couplet oil circuit, subsequent use work couplet oil circuit respectively is parallel with an overload overflow Fill valve.
Preferably; Described valve B type oil pocket structure comprises oil suction chamber; Oil suction chamber and pressure compensation spool ante-chamber, pressure compensation spool back cavity, active chamber respectively with second changeover valve core on pairing logical oil groove be connected, the second changeover valve core two ends respectively are provided with a seal arrangement.
Preferably; Described seal arrangement comprises spring seat, is provided with Returnning spring between spring seat and the end cap, is provided with seal ring between end cap and the spring seat; Described pressure compensation spool peripheral hardware has throttling groove; Its bosom is provided with the recuperation valve inner chamber, and the recuperation valve intracavity bottom is provided with damping hole, and the pressure-compensated valve in-core is provided with the radial bore perpendicular to the recuperation valve inner chamber.
Compact structure of the present invention, reliability is high, can realize the precision control to equipment; Detect the maximum pressure in the load by pressure-compensated valve, and feed back to pump, regulate pump displacement according to the demand of load; Oil hydraulic pump output power and load are adapted, have energy-conservation effect, through pressure-compensated valve being arranged in after the changeover valve core; Each equipment when having solved the flow that requires in work system greater than the limit flow of pump is realized the problem of composite move, and executive component can be synchronized with the movement or with certain speed ratio motion, and does not disturb mutually; Having the anti-saturation function, is a kind of HYDRAULIC CONTROL SYSTEM mode that can be widely used in all kinds of excavators.
Description of drawings
Fig. 1 is a kind of semi-monolithic formula load sensing multi-way valve structural representation provided by the invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 joins the valve body assembly structural representation for oil-feed;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is the B-B sectional view of Fig. 3;
Fig. 6 is a valve A type oil pocket structural representation;
Fig. 7 is a valve B type oil pocket structural representation.
Among the figure: 101 for oil-feed joins valve body assembly, and 102 is the front valve shell assembly, and 102-1 joins oil circuit for swing arm work, and 102-2 joins oil circuit for scraper bowl work, and 102-3 joins oil circuit for dipper work, and 102-4 is that left lateral is walked work couplet oil circuit; 103 is the rear valve body assembly, and 103-1 is that right lateral is walked work couplet oil circuit, and 103-2 is that subsequent use work joins oil circuit, and 103-3 joins oil circuit for dozer work, and 103-4 is that revolution work joins oil circuit, and 104 is tailstock; P is an oil suction chamber, and T is an oil back chamber, and Ps is the pressure feedback chamber, and 1 for oil-feed joins valve body, and 1-1 is a pressure control cavity, and 1-2 is the pressure control adapter cavity; 2 is front valve shell, and 3 is rear valve body, and 4 is main relief valve, and 5 is the pressure compensation unloading valve, and 6 is screw plug; 7 is meta off-load spool, and 8 is the spring bracing ring, and 9 is control spring, and 10 is spacer, and 11 is spring seat; 12 are overload overflow Fill valve, and 13 is one-way valve, and 16 is the pressure compensation spool, and 16-1 is a throttling groove, and 16-2 is the recuperation valve inner chamber; 16-3 is a damping hole, and 16-4 is a radial bore, and 17 is end cap, and 18 is spring seat, and 19 is Returnning spring; 20 is seal ring, and 21 is second changeover valve core, and 22 is first changeover valve core, and A-1 is a pressure compensation spool ante-chamber, and A-2 is a pressure compensation spool back cavity; A-3 is an adapter cavity, and A-4 is an active chamber, and B-1 is a pressure compensation spool ante-chamber, and B-2 is a pressure compensation spool back cavity, and B-3 is an active chamber.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.
Like Fig. 1-shown in Figure 2; A kind of semi-monolithic formula load sensing multi-way valve provided by the invention; It mainly joins valve body assembly 101, front valve shell assembly 102, rear valve body assembly 103 and tailstock 104 etc. by oil-feed and is connected in turn, wherein oil-feed join valve body assembly 101 oil suction chamber P, oil back chamber T, pressure feedback chamber Ps all with oil suction chamber P, oil back chamber T, the pressure feedback chamber Ps connection of front valve shell assembly 102, rear valve body assembly 103.
Like Fig. 3-shown in Figure 5; Oil-feed joins valve body assembly 101 has the oil-feed of comprising to join valve body 1, oil suction chamber P, oil back chamber T, pressure control cavity 1-1, and dress meta off-load spool 7 in the valve body is when arbitrary work joins 22 actions of oil circuit changeover valve core; (when being system works); This meta off-load spool 7 is closed, and oil suction chamber P, oil back chamber T and pressure control cavity 1-1 are separated, and system sets up oil pressure.When work joins oil circuit changeover valve core 22 all at meta; This meta off-load spool 7 is opened, and oil suction chamber P and oil back chamber T UNICOM are because hydraulic oil has certain throttling action through 7 oil returns of meta off-load spool; Oil suction chamber P pressure is improved slightly; Oil hydraulic pump is ready, in case the just very fast-response of system works oil hydraulic pump realizes the meta unloading energy saving.
One end of meta off-load spool 7 is provided with screw plug 6; And pass through Sealing with meta off-load spool 7 and screw plug 6 sealings; The other end of meta off-load spool 7 is provided with spring bracing ring 8; Spring bracing ring 8 leans against on the control spring 9, and control spring 9 is arranged on the bottom and is provided with in the spring seat 11 of spacer 10, and wherein pressure control cavity 1-1 and pressure feedback chamber Ps are through pressure control adapter cavity 1-2 UNICOM; Simultaneously main relief valve 4 has been installed in pressure control cavity 1-1, in pressure control adapter cavity 1-2, pressure compensation unloading valve 5 has been installed.
Like Fig. 1-shown in Figure 2, swing arm work joins oil circuit 102-1, scraper bowl work and joins oil circuit 102-2, dipper work and join oil circuit 102-3 and left lateral and walk work and join oil circuit 102-4 and be integrated on the holistic front valve shell 2 in the front valve shell assembly 102; The 103 right-of-center in political views's walking work of rear valve body assembly join oil circuit 103-1, subsequent use work joins oil circuit 103-2, dozer work couplet oil circuit 103-3 and revolution work couplet oil circuit 103-4 and is integrated on the holistic rear valve body 3.
Like Fig. 1-shown in Figure 2; Have identical valve A type oil pocket structure and valve B type oil pocket structure in front valve shell 2, the rear valve body 3, wherein the swing arm work of front valve shell 1 couplet oil circuit 102-1, scraper bowl work join oil circuit 102-2, dipper work joins oil circuit 102-3 and has identical valve A type oil pocket structure with subsequent use work couplet oil circuit 103-2, dozer work couplet oil circuit 103-3, the revolution work couplet oil circuit 103-4 of rear valve body 2; Left lateral is walked work and is joined oil circuit 102-4 and right lateral and walk work and join oil circuit 103-1 and have the identical valve B type oil pocket structure of another kind.
Like Fig. 1, Fig. 2, shown in Figure 6; Valve A type oil pocket structure has oil suction chamber P, oil back chamber T, pressure feedback chamber Ps; Pressure compensation spool ante-chamber A-1, pressure compensation spool back cavity A-2, adapter cavity A-3/A-5 and active chamber A-4/A-6; In valve body, adorning on different first changeover valve core, 22, the first changeover valve cores 22 has and oil suction chamber P, pressure compensation spool ante-chamber A-1, adapter cavity A-3/A-5 and the corresponding logical oil groove of active chamber A-4/A-6, and a seal arrangement respectively is equipped with at first changeover valve core, 22 two ends.Simultaneously behind first changeover valve core 22, also be provided with pressure compensation spool 16.In order to prevent that fluid from flowing backwards, and also respectively is provided with an one-way valve 13 at pressure compensation spool back cavity A-2 and valve body both sides adapter cavity A-3/A-5 place.An overload of each parallel connection of the active chamber A-4/A-6 overflow Fill valve 12 that joins oil circuit 102-1, scraper bowl work couplet oil circuit 102-2, dipper work couplet oil circuit 102-3, subsequent use work couplet oil circuit 103-2 simultaneously in swing arm work; The maximum locking pressure of restriction oil hydraulic cylinder under blocking, protection hydraulic element and pipeline are avoided damaging.
As shown in Figure 7; Valve B type oil pocket structure has oil suction chamber P, oil back chamber T, pressure feedback chamber Ps; Pressure compensation spool ante-chamber B-1, pressure compensation spool back cavity B-2 and active chamber B-3/B-4; In valve body, adorn second changeover valve core 21; Have on second changeover valve core 21 and oil suction chamber P, pressure compensation spool ante-chamber B-1, pressure compensation spool back cavity B-2 and the corresponding logical oil groove of active chamber B-3/B-4, a seal arrangement respectively is equipped with at second changeover valve core, 21 two ends, behind second changeover valve core 21, also is provided with pressure compensation spool 16 simultaneously.
Like Fig. 1-shown in Figure 2; A kind of semi-monolithic formula load sensing multi-way valve provided by the invention; It mainly joins valve body assembly 101, front valve shell assembly 102, rear valve body assembly 103 and tailstock 104 etc. by oil-feed and is connected in turn, wherein oil-feed join valve body assembly 101 oil suction chamber P, oil back chamber T, pressure feedback chamber Ps all with oil suction chamber P, oil back chamber T, the pressure feedback chamber Ps connection of front valve shell assembly 102, rear valve body assembly 103.
Like Fig. 3-shown in Figure 5; Oil-feed joins valve body assembly 101 has the oil-feed of comprising to join valve body 1, oil suction chamber P, oil back chamber T, pressure control cavity 1-1, and dress meta off-load spool 7 in the valve body is when arbitrary work joins 22 actions of oil circuit changeover valve core; (when being system works); This meta off-load spool 7 is closed, and oil suction chamber P, oil back chamber T and pressure control cavity 1-1 are separated, and system sets up oil pressure.When work joins oil circuit changeover valve core 22 all at meta; This meta off-load spool 7 is opened, and oil suction chamber P and oil back chamber T UNICOM are because hydraulic oil has certain throttling action through 7 oil returns of meta off-load spool; Oil suction chamber P pressure is improved slightly; Oil hydraulic pump is ready, in case the just very fast-response of system works oil hydraulic pump realizes the meta unloading energy saving.
One end of meta off-load spool 7 is provided with screw plug 6; And pass through Sealing with meta off-load spool 7 and screw plug 6 sealings; The other end of meta off-load spool 7 is provided with spring bracing ring 8; Spring bracing ring 8 leans against on the control spring 9, and control spring 9 is arranged on the bottom and is provided with in the spring seat 11 of spacer 10, and wherein pressure control cavity 1-1 and pressure feedback chamber Ps are through pressure control adapter cavity 1-2 UNICOM; Simultaneously main relief valve 4 has been installed in pressure control cavity 1-1, in pressure control adapter cavity 1-2, pressure compensation unloading valve 5 has been installed.
Like Fig. 1-shown in Figure 2, swing arm work joins oil circuit 102-1, scraper bowl work and joins oil circuit 102-2, dipper work and join oil circuit 102-3 and left lateral and walk work and join oil circuit 102-4 and be integrated on the holistic front valve shell 2 in the front valve shell assembly 102; The 103 right-of-center in political views's walking work of rear valve body assembly join oil circuit 103-1, subsequent use work joins oil circuit 103-2, dozer work couplet oil circuit 103-3 and revolution work couplet oil circuit 103-4 and is integrated on the holistic rear valve body 3.
Like Fig. 1-shown in Figure 2; Have identical valve A type oil pocket structure and valve B type oil pocket structure in front valve shell 2, the rear valve body 3, wherein the swing arm work of front valve shell 1 couplet oil circuit 102-1, scraper bowl work join oil circuit 102-2, dipper work joins oil circuit 102-3 and has identical valve A type oil pocket structure with subsequent use work couplet oil circuit 103-2, dozer work couplet oil circuit 103-3, the revolution work couplet oil circuit 103-4 of rear valve body 2; Left lateral is walked work and is joined oil circuit 102-4 and right lateral and walk work and join oil circuit 103-1 and have the identical valve B type oil pocket structure of another kind.
Like Fig. 1, Fig. 2, shown in Figure 6; Valve A type oil pocket structure has oil suction chamber P, oil back chamber T, pressure feedback chamber Ps; Pressure compensation spool ante-chamber A-1, pressure compensation spool back cavity A-2, adapter cavity A-3/A-5 and active chamber A-4/A-6; In valve body, adorn the first different changeover valve cores 22; Have on first changeover valve core 22 and oil suction chamber P, pressure compensation spool ante-chamber A-1, adapter cavity A-3/A-5 and the corresponding logical oil groove of active chamber A-4/A-6, a spring seat 18, Returnning spring 19 and end cap 17 respectively are equipped with in first changeover valve core, 22 two ends.Simultaneously behind first changeover valve core 22, also be provided with pressure compensation spool 16.In order to prevent that fluid from flowing backwards, and also respectively is provided with an one-way valve 13 at pressure compensation spool back cavity A-2 and valve body both sides adapter cavity A-3/A-5 place.An overload of each parallel connection of the active chamber A-4/A-6 overflow Fill valve 12 that joins oil circuit 102-1, scraper bowl work couplet oil circuit 102-2, dipper work couplet oil circuit 102-3, subsequent use work couplet oil circuit 103-2 simultaneously in swing arm work; The maximum locking pressure of restriction oil hydraulic cylinder under blocking, protection hydraulic element and pipeline are avoided damaging.
As shown in Figure 7; Valve B type oil pocket structure has oil suction chamber P, oil back chamber T, pressure feedback chamber Ps; Pressure compensation spool ante-chamber B-1, pressure compensation spool back cavity B-2 and active chamber B-3/B-4; In valve body, adorn second changeover valve core 21; Have on second changeover valve core 21 and oil suction chamber P, pressure compensation spool ante-chamber B-1, pressure compensation spool back cavity B-2 and the corresponding logical oil groove of active chamber B-3/B-4, a spring seat 18, Returnning spring 19, end cap 17 and seal ring 20 respectively are equipped with in second changeover valve core, 21 two ends, behind second changeover valve core 21, also are provided with pressure compensation spool 16 simultaneously.
Like Fig. 6-shown in Figure 7; Be provided with Returnning spring 19 between spring seat 18 and the end cap 17, be provided with seal ring 20 between end cap 17 and the spring seat 18, end cap 17, spring seat 18, Returnning spring 19, seal ring 20 are formed seal arrangement; The pressure compensation spool 16 outer throttling groove 16-1 that are provided with; Its bosom is provided with recuperation valve inner chamber 16-2, and recuperation valve inner chamber 16-2 bottom is provided with damping hole 16-3, is provided with the radial bore 16-4 perpendicular to recuperation valve inner chamber 16-2 in the pressure compensation spool 16.
Claims (6)
1. semi-monolithic formula load sensing multi-way valve; It is characterized in that; Comprise that oil-feed joins valve body assembly (101); Oil-feed joins valve body assembly (101) and links to each other successively with front valve shell assembly (102), rear valve body assembly (103), tailstock (104), the oil suction chamber (P) of oil-feed couplet valve body assembly (101), oil back chamber (T), pressure feedback chamber (Ps) all with oil suction chamber (P), oil back chamber (T), pressure feedback chamber (Ps) connection of front valve shell assembly (102), rear valve body assembly (103).
2. a kind of semi-monolithic formula load sensing multi-way valve as claimed in claim 1; It is characterized in that; Described oil-feed joins valve body assembly (101) and comprises that oil-feed joins valve body (1), is provided with meta off-load spool (7) in the oil-feed couplet valve body (1), and described oil suction chamber (P) is connected with oil back chamber (T) through meta off-load spool (7); Meta off-load spool (7) separates oil suction chamber (P), oil back chamber (T) and pressure control cavity (1-1) simultaneously; One end of meta off-load spool (7) is provided with screw plug (6), and the other end of meta off-load spool (7) is provided with spring bracing ring (8), and spring bracing ring (8) leans against on the control spring (9); Control spring (9) is arranged on the bottom and is provided with in the spring seat (11) of spacer (10); Be provided with main relief valve (4) in the pressure control cavity (1-1), pressure control cavity (1-1) passes through pressure control adapter cavity (1-2) UNICOM with pressure feedback chamber (Ps), is provided with pressure compensation unloading valve (5) in the pressure control adapter cavity (1-2).
3. a kind of semi-monolithic formula load sensing multi-way valve as claimed in claim 1; It is characterized in that; Described front valve shell assembly (102) comprises front valve shell (2); Front valve shell (2) is walked work couplet oil circuit (102-4) by swing arm work couplet oil circuit (102-1), scraper bowl work couplet oil circuit (102-2), dipper work couplet oil circuit (102-3) and left lateral and is integrated in an integral body; Described rear valve body assembly (103) comprises rear valve body (3); Rear valve body (3) is walked work couplet oil circuit (103-1), subsequent use work couplet oil circuit (103-2), dozer work couplet oil circuit (103-3) and revolution work couplet oil circuit (103-4) by right lateral and is integrated in an integral body; Swing arm work joins oil circuit (102-1), scraper bowl work and joins oil circuit (102-2), dipper work and join oil circuit (102-3) and subsequent use work and join that oil circuit (103-2), dozer work join oil circuit (103-3), revolution work joins oil circuit (103-4) and has identical valve A type oil pocket structure, and left lateral is walked work and joined oil circuit (102-4) and walk work couplet oil circuit (103-1) with right lateral and have identical valve B type oil pocket structure.
4. a kind of semi-monolithic formula load sensing multi-way valve as claimed in claim 3; It is characterized in that; Described valve A type oil pocket structure comprises oil suction chamber (P); Oil suction chamber (P) is gone up pairing logical oil groove with first changeover valve core (22) respectively with pressure compensation spool ante-chamber (A-1), adapter cavity (A-3), active chamber (A-4) and is connected; Respectively there is a seal arrangement at the two ends of first changeover valve core (22); Be provided with pressure compensation spool (16) behind first changeover valve core (22), pressure compensation spool back cavity (A-2) locates respectively to be provided with an one-way valve (13) with valve body both sides adapter cavity (A-3), and the active chamber (A-4) that swing arm work joins oil circuit (102-1), scraper bowl work couplet oil circuit (102-2), dipper work couplet oil circuit (102-3), subsequent use work couplet oil circuit (103-2) respectively is parallel with an overload overflow Fill valve (12).
5. a kind of semi-monolithic formula load sensing multi-way valve as claimed in claim 3; It is characterized in that; Described valve B type oil pocket structure comprises oil suction chamber (P); Oil suction chamber (P) is gone up pairing logical oil groove with second changeover valve core (21) respectively with pressure compensation spool ante-chamber (B-1), pressure compensation spool back cavity (B-2), active chamber (B-3) and is connected, and second changeover valve core (21) two ends respectively are provided with a seal arrangement.
6. like claim 4 or 5 described a kind of semi-monolithic formula load sensing multi-way valve; It is characterized in that; Described seal arrangement comprises spring seat (18), is provided with Returnning spring (19) between spring seat (18) and the end cap (17), is provided with seal ring (20) between end cap (17) and the spring seat (18); The outer throttling groove (16-1) that is provided with of described pressure compensation spool (16); Its bosom is provided with recuperation valve inner chamber (16-2), and recuperation valve inner chamber (16-2) bottom is provided with damping hole (16-3), is provided with the radial bore (16-4) perpendicular to recuperation valve inner chamber (16-2) in the pressure compensation spool (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210187622.0A CN102678649B (en) | 2012-06-07 | 2012-06-07 | Half integral load-sensing multiway valve |
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| CN201210187622.0A CN102678649B (en) | 2012-06-07 | 2012-06-07 | Half integral load-sensing multiway valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573733A (en) * | 2013-11-05 | 2014-02-12 | 龙工（上海）精工液压有限公司 | Novel buffering pressure-stabilizing valve used for hydraulic motor |
| CN104019071A (en) * | 2014-06-10 | 2014-09-03 | 山东中川液压有限公司 | Energy-saving hydraulic valve used for hydraulic excavator |
| CN104495709A (en) * | 2015-01-20 | 2015-04-08 | 宁波高新协力机电液有限公司 | Loading pressure feedback proportional multi-way valve for electric forklift |
| CN105840572A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Reversing link for load-sensitive multi-way valve, load-sensitive multi-way valve and engineering machinery hydraulic system |
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| CN103573733A (en) * | 2013-11-05 | 2014-02-12 | 龙工（上海）精工液压有限公司 | Novel buffering pressure-stabilizing valve used for hydraulic motor |
| CN103573733B (en) * | 2013-11-05 | 2016-01-27 | 龙工（上海）精工液压有限公司 | A kind of buffering pressure maintaining valve for oil hydraulic motor |
| CN104019071A (en) * | 2014-06-10 | 2014-09-03 | 山东中川液压有限公司 | Energy-saving hydraulic valve used for hydraulic excavator |
| CN104019071B (en) * | 2014-06-10 | 2016-02-24 | 山东中川液压有限公司 | A kind of energy-conserving hydraulic valve for hydraulic shovel |
| CN105840572A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Reversing link for load-sensitive multi-way valve, load-sensitive multi-way valve and engineering machinery hydraulic system |
| CN104495709A (en) * | 2015-01-20 | 2015-04-08 | 宁波高新协力机电液有限公司 | Loading pressure feedback proportional multi-way valve for electric forklift |
| CN104495709B (en) * | 2015-01-20 | 2016-11-30 | 宁波高新协力机电液有限公司 | Load pressure feedback proportional multi-way valve on electri forklift |
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