CN103148036B - Hydrovalve - Google Patents
Hydrovalve Download PDFInfo
- Publication number
- CN103148036B CN103148036B CN201310087729.2A CN201310087729A CN103148036B CN 103148036 B CN103148036 B CN 103148036B CN 201310087729 A CN201310087729 A CN 201310087729A CN 103148036 B CN103148036 B CN 103148036B
- Authority
- CN
- China
- Prior art keywords
- valve
- control
- oil
- flow direction
- pressure reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses a kind of hydrovalve, control unloading valve (21) by pressure reduction, two or more flow direction control valves (22) formed, described pressure reduction controls unloading valve (21) and is made up of control valve body (1), fluid-control one-way spool (2), pressure difference control valve core (3), pressure reduction control spring (4), relief valve (5), series flow control valve (6); Described flow direction control valve (22) keeps one-way valve (13) to form by valve body (7), control valve rod (8), valve rod control spring (9), pressure compensation spool (10), Pilot operated check valve oil circuit control (11), load, oil hydraulic pump to current each equipment the hydraulic fluid flow rate of confession and the flow area direct proportionality of corresponding discharge position control valve (22) valve port opening, and with load have nothing to do.
Description
Technical field
The present invention relates to a kind of hydrovalve, particularly the hydrovalve of a kind of supplied flow and valve rod opening flow area direct proportionality.
Background technique
At present, known main-control valve of excavating machine mainly contains: 1, be applied to the inverted flux control valve of variable system, positive flow control valve, LS control valve, LUDV control valve, inverted flux control valve, positive flow control valve are when multiple actuator works simultaneously, to each actuator supply flow relevant to load, handling difference, various main control valve can only be applied to variable delivery hydraulic system above, if for fixed dilivery hydraulic system, because meta can not directly off-load oil return, the problems such as hydraulic system energy consumption is too high, heating value is excessive will be brought.2, the switching mode multiple directional control valve of fixed dilivery hydraulic system is applied to, when single or multiple actuator works simultaneously, to each actuator supply that flow is relevant to load, hydraulic shock is large, handling difference, joint operation is not carried out, at the bottom of working efficiency under most cases.
Summary of the invention
In order to overcome existing excavator fixed dilivery hydraulic system main control valve to actuator supply flow relevant to load, handling difference, hydraulic shock is large, joint operation is difficult, the problem such as at the bottom of working efficiency, the invention provides. a kind of hydrovalve, control unloading valve by pressure reduction, two or more flow direction control valves formed, described pressure reduction controls unloading valve and is made up of control valve body, fluid-control one-way spool, pressure difference control valve core, pressure reduction control spring, relief valve, series flow control valve; Described flow direction control valve keeps one-way valve to form by valve body, control valve rod, valve rod control spring, pressure compensation spool, Pilot operated check valve oil circuit control, load, oil hydraulic pump to current each equipment the hydraulic fluid flow rate of confession and the flow area direct proportionality of corresponding discharge position control valve valve port opening, and with load have nothing to do.
Further, described flow direction control valve also comprises secondary relief, determines whether configuration as required.
Further, when hydraulic system does not work, described in each, flow direction control valve is all in neutral position, and the hydraulic oil that described oil hydraulic pump provides is through the oil return of Pilot operated check valve oil circuit.
Further, when one or more described flow direction control valve commutation work, described Pilot operated check valve oil circuit control is closed.
Further, when single flow direction control valve work, the forward and backward pressure reduction of flow direction control valve valve port opening of work at present controls described pressure reduction control unloading valve and whether opens off-load, unnecessary hydraulic oil controls unloading valve off-load through pressure reduction, makes the forward and backward pressure reduction of flow direction control valve valve port opening of work at present keep constant.
Further, when flow direction control valve described in two and two or more works, oil hydraulic pump through each flow direction control valve of work at present simultaneously to respective execution mechanisms fuel feeding, meanwhile get the highest flow direction control valve valve port opening of working pressure instantly forward and backward pressure reduction control pressure reduction control unloading valve and whether open off-load, unnecessary hydraulic oil controls unloading valve off-load through pressure reduction.
Further, now, the oily flow direction control valve valve port open rearward end the highest from work at present pressure of control of LS oil circuit control, relevant pressure recuperation valve on each flow direction control valve making working pressure lower cuts out towards the oil circuit control of LS, thus the flow direction control valve valve port opening forward and backward pressure of LS oil circuit control to work at present compensates, and makes the forward and backward pressure reduction of each flow direction control valve valve port opening of work at present keep the same.
When this hydrovalve is in neutral position from the hydraulic oil of oil hydraulic pump through Pilot operated check valve oil return, can solve well hydrovalve to each actuator supply that flow is relevant to load, hydraulic shock is large, do not carry out joint operation, inefficiency under handling difference, most cases, the problem such as energy consumption is high, heating value is large.
This valve has nothing to do to each working hole fuel supply flow rate and load, is determined by corresponding valve rod opening flow area, supply flow and valve rod opening flow area direct proportionality; This valve can control multiple actuator simultaneously, to each actuator supply flow and load to have nothing to do, and with corresponding valve rod opening flow area direct proportionality, possess anti-saturation ability.This valve supply working flow and load irrelevant and the joint work of multiple actuators can be controlled simultaneously, handling good, working efficiency is high.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of hydrovalve of the present invention;
Fig. 2 is that the pressure reduction of hydrovalve of the present invention controls unloading valve structural drawing;
Fig. 3 is the flow direction control valve structural drawing of hydrovalve of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As Figure 1-3, hydrovalve of the present invention formed primarily of pressure reduction control unloading valve 21, two or more flow direction control valves 22.Described pressure reduction controls unloading valve 21 primarily of compositions such as control valve body 1, fluid-control one-way spool 2, pressure difference control valve core 3, pressure reduction control spring 4, relief valve 5, series flow control valves 6; Flow direction control valve 22 keeps the compositions such as one-way valve 13 primarily of valve body 7, control valve rod 8, valve rod control spring 9, pressure compensation spool 10, Pilot operated check valve oil circuit control 11, secondary relief 12, load, and secondary relief 12 determines whether configuration as required.
As shown in Figure 1, hydrovalve working principle of the present invention is: 1, when hydraulic system does not work, each flow direction control valve 22 is all in neutral position Pilot operated check valve oil circuit control 11 and communicates with oil return, and the hydraulic oil that oil hydraulic pump provides is through Pilot operated check valve 2 oil return, 2, when hydraulic system is in running order, one or more flow direction control valve 22 commutation work, Pilot operated check valve oil circuit control 11 is closed, Pilot operated check valve 2 is closed, hydraulic oil from oil hydraulic pump is closed to the oil circuit of oil return, oil hydraulic pump through flow direction control valve 22 to equipment fuel feeding: 1) when single flow direction control valve 22 works, oil hydraulic pump through the flow direction control valve 22 of work at present to the equipment of work at present and LS oil circuit control fuel feeding, before the flow direction control valve 22 valve port opening of work at present, rear pressure reduction controls pressure reduction control unloading valve 21 and whether opens off-load, unnecessary hydraulic oil controls unloading valve 21 off-load through pressure reduction, before making the flow direction control valve valve port opening of work at present, rear pressure reduction keeps constant, thus oil hydraulic pump to work at present device the hydraulic fluid flow rate of confession and the flow area direct proportionality of flow direction control valve valve port opening, and have nothing to do in load, 2) as two and the work of two or more flow direction control valve, oil hydraulic pump through each flow direction control valve 22 of work at present simultaneously to respective execution mechanisms fuel feeding, before simultaneously getting the highest flow direction control valve valve port opening of working pressure instantly, rear pressure reduction controls pressure reduction control unloading valve and whether opens off-load, unnecessary hydraulic oil controls unloading valve 21 off-load through pressure reduction, the now oily flow direction control valve 22 valve port open rearward end the highest from working pressure instantly of the control of LS oil circuit control, relevant pressure recuperation valve on each flow direction control valve 22 making working pressure lower cuts out towards the oil circuit control of LS, thus LS oil circuit control is to before the flow direction control valve 22 valve port opening of work at present, rear pressure compensates, before making each flow direction control valve valve port opening of work at present, rear pressure reduction keeps the same, thus oil hydraulic pump to current each equipment the hydraulic fluid flow rate of confession and the flow area direct proportionality of corresponding discharge position control valve valve port opening, pro rate is carried out by the flow area of corresponding discharge position control valve 22 valve port opening, and have nothing to do with load.
As shown in Figure 2, pressure reduction controls unloading valve 21 primarily of compositions such as control valve body 1, fluid-control one-way spool 2, pressure difference control valve core 3, pressure reduction control spring 4, relief valve 5, series flow control valves 6, the oil circuit control of fluid-control one-way spool 2 is when each flow direction control valve 22 communicates with oil return circuit, the oil return of fluid-control one-way spool 2 oil circuit control, fluid-control one-way spool 2 is opened under the pressure effect of the hydraulic oil from oil hydraulic pump, from the hydraulic oil oil return of squeeze pump, when one or more flow direction control valve 22 works, fluid-control one-way spool oil circuit control is closed, now the hydraulic fluid pressure of fluid-control one-way spool oil circuit control is equal with the hydraulic fluid pressure from oil hydraulic pump, fluid-control one-way spool 2 is closed, oil hydraulic pump through flow direction control valve 22 to equipment fuel feeding, unnecessary hydraulic oil controls the off-load of off-load spool 3 through pressure reduction, pressure reduction controls off-load spool 3 with pressure reduction control spring 4 for before guaranteed flow position control valve valve port opening, rear pressure reduction keeps constant, unnecessary hydraulic oil off-load, and when working pressure reaches setting pressure, relief valve 5 is opened, the overflow of LS oil circuit, pressure reduction controls the spring force that off-load spool 3 overcomes pressure reduction control spring 4 under from the hydraulic fluid pressure effect of oil hydraulic pump and opens, hydraulic oil from oil hydraulic pump controls the overflow of off-load spool 3 through pressure reduction, ensure hydraulic system trouble free service, series flow control valve 6 is for ensureing that the pilot pressure of LS oil circuit control disappears and less flow loss in time.
As shown in Figure 3, flow direction control valve 22 keeps the compositions such as one-way valve 13 primarily of valve body 7, control valve rod 8, valve rod control spring 9, pressure compensation spool 10, Pilot operated check valve oil circuit control 11, secondary relief 12, load, and secondary relief 12 determines whether configuration as required.Control the Main Function of valve rod 8 and valve rod control spring 9: 1, control hydraulic oil from oil hydraulic pump to the fuel feeding direction of actuator; 2, controlling the flow area of the valve port opening relevant to fuel supply flow rate, for controlling the execution speed of actuator, ensureing controllability, mechanism's traveling comfort of the execution speed of actuator; 3, control Pilot operated check valve oil circuit control 11 and ensure that the oil circuit control of Pilot operated check valve can directly oil return when each flow direction control valve is all in neutral position, make Pilot operated check valve be in enable possition, from the hydraulic oil of oil hydraulic pump through Pilot operated check valve oil return; When ensureing that one or more flow direction control valves are in running order, the oil circuit control of Pilot operated check valve is in closed condition, close with oil return circuit, the oil circuit control pressure of Pilot operated check valve is equal with the hydraulic fluid pressure from oil hydraulic pump, Pilot operated check valve is closed under pilot pressure effect, now oil hydraulic pump through flow direction control valve to equipment fuel feeding.When pressure compensation spool 10 works for two or more flow direction control valves simultaneously, before getting the highest flow direction control valve valve port opening of work at present pressure, rear pressure reduction controls pressure reduction control unloading valve 21 and whether opens off-load, unnecessary hydraulic oil controls unloading valve 21 off-load through pressure reduction, the now oily flow direction control valve valve port open rearward end the highest from work at present pressure of the control of LS oil circuit control, relevant pressure recuperation valve on each flow direction control valve making working pressure lower cuts out towards the oil circuit control of LS, thus LS oil circuit control is to before the flow direction control valve valve port opening of work at present, rear pressure compensates, before making each flow direction control valve valve port opening of work at present, rear pressure reduction keeps the same, thus oil hydraulic pump to current each equipment the hydraulic fluid flow rate of confession and the flow area direct proportionality of corresponding discharge position control valve valve port opening, pro rate flow is carried out by the flow area of corresponding discharge position control valve valve port opening, and have nothing to do with load, secondary relief 21 determines whether configuration according to the need of work of each flow direction control valve, is mainly used in buffering and prevents the effects such as system overcharge, load keeps one-way valve 13 to prevent hydraulic oil from refluxing, the first-class phenomenon of equipment appearance point.
Claims (5)
1. a hydrovalve, control unloading valve (21) by pressure reduction, two or more flow direction control valves (22) formed, it is characterized in that: described pressure reduction controls unloading valve (21) and is made up of control valve body (1), fluid-control one-way spool (2), pressure reduction control off-load spool (3), pressure reduction control spring (4), relief valve (5), series flow control valve (6); Described flow direction control valve (22) keeps one-way valve (13) to form by valve body (7), control valve rod (8), valve rod control spring (9), pressure compensation spool (10), Pilot operated check valve oil circuit control (11), load, oil hydraulic pump to current each equipment the hydraulic fluid flow rate of confession and the flow area direct proportionality of corresponding discharge position control valve (22) valve port opening, and with load have nothing to do;
The oil circuit control of described fluid-control one-way spool (2) is when each flow direction control valve (22) communicates with oil return circuit, fluid-control one-way spool (2) oil circuit control oil return, fluid-control one-way spool (2) is opened under the pressure effect of the hydraulic oil from oil hydraulic pump, from the hydraulic oil oil return of squeeze pump, when one or more flow direction control valve (22) works, fluid-control one-way spool oil circuit control is closed, now the hydraulic fluid pressure of fluid-control one-way spool oil circuit control is equal with the hydraulic fluid pressure from oil hydraulic pump, fluid-control one-way spool (2) is closed, oil hydraulic pump through flow direction control valve (22) to equipment fuel feeding, unnecessary hydraulic oil controls off-load spool (3) off-load through pressure reduction, pressure reduction controls off-load spool (3) with pressure reduction control spring (4) for before guaranteed flow position control valve valve port opening, rear pressure reduction keeps constant, unnecessary hydraulic oil off-load, and when working pressure reaches setting pressure, relief valve (5) is opened, the overflow of LS oil circuit, pressure reduction controls the spring force that off-load spool (3) overcomes pressure reduction control spring (4) under from the hydraulic fluid pressure effect of oil hydraulic pump and opens, hydraulic oil from oil hydraulic pump controls off-load spool (3) overflow through pressure reduction, series flow control valve (6) is for ensureing that the pilot pressure of LS oil circuit control disappears and less flow loss in time,
Described control valve rod (8) and valve rod control spring (9) act on and are: 1, control hydraulic oil from oil hydraulic pump to the fuel feeding direction of actuator; 2, the flow area of the valve port opening relevant to fuel supply flow rate is controlled, for controlling the execution speed of actuator; 3, control Pilot operated check valve oil circuit control (11) and ensure that the oil circuit control of Pilot operated check valve can directly oil return when each flow direction control valve is all in neutral position, Pilot operated check valve is made to be in enable possition, from the hydraulic oil of oil hydraulic pump through Pilot operated check valve oil return; When described pressure compensation spool (10) works for two or more flow direction control valves simultaneously, get forward and backward pressure reduction control pressure reduction control unloading valve (21) of the highest flow direction control valve valve port opening of work at present pressure and whether open off-load, unnecessary hydraulic oil controls unloading valve (21) off-load through pressure reduction; Load keeps one-way valve (13) to prevent hydraulic oil from refluxing.
2. hydrovalve as claimed in claim 1, is characterized in that: described flow direction control valve (22) also comprises secondary relief (12), determines whether configuration as required; For cushioning and prevent the effect of system overcharge.
3. hydrovalve as claimed in claim 1, it is characterized in that: when hydraulic system does not work, flow direction control valve described in each (22) is all in neutral position, and the hydraulic oil that described oil hydraulic pump provides is through Pilot operated check valve oil circuit (11) oil return.
4. hydrovalve as claimed in claim 1, it is characterized in that: when single flow direction control valve (22) works, the forward and backward pressure reduction of flow direction control valve (22) valve port opening of work at present controls described pressure reduction control unloading valve (21) and whether opens off-load, unnecessary hydraulic oil controls unloading valve (21) off-load through pressure reduction, makes the forward and backward pressure reduction of the flow direction control valve of work at present (22) valve port opening keep constant.
5. hydrovalve as claimed in claim 1, it is characterized in that: now, oily flow direction control valve (22) the valve port open rearward end the highest from work at present pressure of control of LS oil circuit control, relevant pressure recuperation valve on each flow direction control valve (22) making working pressure lower cuts out towards the oil circuit control of LS, thus the flow direction control valve valve port opening forward and backward pressure of LS oil circuit control to work at present compensates, and makes the forward and backward pressure reduction of each flow direction control valve (22) the valve port opening of work at present keep the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087729.2A CN103148036B (en) | 2013-03-19 | 2013-03-19 | Hydrovalve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087729.2A CN103148036B (en) | 2013-03-19 | 2013-03-19 | Hydrovalve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103148036A CN103148036A (en) | 2013-06-12 |
| CN103148036B true CN103148036B (en) | 2015-09-09 |
Family
ID=48546293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310087729.2A Expired - Fee Related CN103148036B (en) | 2013-03-19 | 2013-03-19 | Hydrovalve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103148036B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452935B (en) * | 2013-08-27 | 2015-11-18 | 北京机械设备研究所 | A kind of pump delivery pressure is not by the closed system hydrovalve of load disturbance |
| CN104912857A (en) * | 2014-03-11 | 2015-09-16 | 江苏科迈液压控制系统有限公司 | Multi-way valve |
| CN104500477B (en) * | 2014-12-18 | 2016-08-24 | 宁波市镇海展跃液压件制造有限公司 | Pressure-releasing type fluid-control one-way logical valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2844532Y (en) * | 2005-07-19 | 2006-12-06 | 四川长江液压件有限责任公司 | Multi-path switching valve of hydraulic crane |
| CN101858368A (en) * | 2010-05-13 | 2010-10-13 | 山东泰丰液压设备有限公司 | Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation |
| CN101936316A (en) * | 2010-09-30 | 2011-01-05 | 临海市海克力机械有限公司 | Positive flow control engineering machinery multi-path reversing valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6745564B2 (en) * | 2001-12-21 | 2004-06-08 | Volvo Construction Equipment Holding Sweden Ab | Hydraulic variable control apparatus for heavy construction equipment |
-
2013
- 2013-03-19 CN CN201310087729.2A patent/CN103148036B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2844532Y (en) * | 2005-07-19 | 2006-12-06 | 四川长江液压件有限责任公司 | Multi-path switching valve of hydraulic crane |
| CN101858368A (en) * | 2010-05-13 | 2010-10-13 | 山东泰丰液压设备有限公司 | Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation |
| CN101936316A (en) * | 2010-09-30 | 2011-01-05 | 临海市海克力机械有限公司 | Positive flow control engineering machinery multi-path reversing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103148036A (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104929183B (en) | A kind of loader turned to based on Flow amplification determines variable delivery hydraulic system | |
| US9528531B2 (en) | Hydraulic drive apparatus for work machine | |
| CN202251199U (en) | Electro-hydraulic proportional combined maneuvering valve | |
| CN102345749B (en) | Flow collecting valve and crane hydraulic control system with the same | |
| CN103122648B (en) | Multi-way valve hydraulic control system, rectilinear walking control valve and excavator | |
| CN102251996A (en) | Engineering mechanical load sensing hydraulic system | |
| CN204164074U (en) | Multi-way valve and hydraulic flow shared system | |
| CN103148036B (en) | Hydrovalve | |
| CN103085865A (en) | Load sensitive turning hydraulic system of loading machine | |
| CN201896802U (en) | Unidirectional differential speed-regulation hydraulic control device | |
| CN202851491U (en) | Load-sensitive multi-way valve used in loader variable system | |
| CN202182071U (en) | Engineering mechanical load sensing hydraulic system | |
| CN107676325B (en) | Energy recovery valve group and hydraulic excavator | |
| CN102966132A (en) | Swing arm descending control loop of hydraulic excavator | |
| CN104444893A (en) | Winch control system | |
| US20160017901A1 (en) | Pressure loss reducing circuit for a works machine | |
| CN104179739A (en) | Dual-pump bidirectional confluence control system and fire truck adopting same | |
| CN203201892U (en) | Hydraulic valve | |
| CN103498491A (en) | Bucket rod prior control loop of excavator and bucket rod control method | |
| CN113431127A (en) | Main control valve, fixed variable hydraulic system and loader | |
| JP2010065511A (en) | Hydraulic control device for working machine | |
| US20160017897A1 (en) | Regenerative circuit of hydraulic apparatus | |
| CN202040139U (en) | Multichannel reversing valve | |
| CN204921522U (en) | Excavator decompression throttle system | |
| CN204692224U (en) | A kind of interflow control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |