CN103398038A - Multifunctional three-way flow control valve and hydraulic system of construction machinery - Google Patents
Multifunctional three-way flow control valve and hydraulic system of construction machinery Download PDFInfo
- Publication number
- CN103398038A CN103398038A CN2013103536711A CN201310353671A CN103398038A CN 103398038 A CN103398038 A CN 103398038A CN 2013103536711 A CN2013103536711 A CN 2013103536711A CN 201310353671 A CN201310353671 A CN 201310353671A CN 103398038 A CN103398038 A CN 103398038A
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- way
- control valve
- feedback
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a multifunctional three-way flow control valve and a hydraulic system of construction machinery. The control valve comprises a three-way flow rate compensation valve (1), a feedback pressure stabilizing valve (2) and a pressure control valve (3), wherein the three-way flow rate compensation valve (1) is provided with an oil inlet, an oil outlet and a pressure feedback oil port; the feedback pressure stabilizing valve (2) is arranged on the pressure feedback oil circuit of the three-way flow rate compensation valve (1); the oil inlet of the pressure control valve (3) is communicated with the pressure feedback oil port of the three-way flow rate compensation valve (1), and the oil outlet of the pressure control valve (3) is communicated with the oil outlet of the three-way flow rate compensation valve (1). The control valve can eliminate influence on the three-way flow rate compensation valve from the feedback pressure fluctuation to eliminate shaking and climbing in the starting process of an actuating mechanism, as well as impact generated in the stop process of the actuating mechanism, thereby enhancing tender moving in the starting process of the construction machinery hydraulic actuating mechanism and stability in the stop process and improving the safety performance of construction machinery.
Description
Technical field
The present invention relates to the hydrovalve technical field, particularly be applied to the three way flow control valve of load-sensitive multiple directional control valve.The invention still further relates to the construction machinery hydraulic system that is provided with described control valve.
Background technique
In construction machinery hydraulic system, the One's name is legion of executive component, sometimes need the coordination simultaneously of many actuators or the action of single actuator, no matter be the action of many actuators or the action of single actuator, under the effect of metering pump, all need the regulating system flow, to meet actuator's action or the coordination requirement to flow, under this background, the three-way flowrate compensation technique is arisen at the historic moment.
At present, the three-way flowrate compensation technique has obtained general application on engineering machinery, and its three-way flowrate recuperation valve is under the effect of system load feedback pressure, spring force, hydraulic power and oil supply pressure, and regulating system enters the flow of actuator.
When the system inflow-rate of water turbine, the pressure compensator of three-way flowrate recuperation valve and each actuator guarantees that each actuator load flow does not change with the variation of outer load; When system undercurrent amount, the pressure compensator acting in conjunction of three-way flowrate recuperation valve and each actuator guarantees that each mechanism loading of operation simultaneously can be according to the Program Coordination action that sets in advance, to meet each actuator's action request.
There is the defect of fine motion and poor stability in three-way flowrate recuperation valve of the prior art, when fluctuation appears in feedback pressure, can cause the three-way flowrate recuperation valve unstable, and then cause the fluctuation of flow system flow, pressure, actuator can not get stable flow and will produce shake, creeps and impact this moment, even cause the vibration of structural member, have potential safety hazard, also make the operator feel uncomfortable simultaneously.
Trace it to its cause, mainly be three-way flowrate recuperation valve response lag and spring chamber pressure transient, cause three-way flowrate compensator low-response and opening unstable, external expressive form is crack mouthful of shake of actuator and actuator's slow movement, is subjected to the impact of the factors such as dynamic excitation signal serious in actuator's course of action.
Therefore, how effectively improving the stability of load feedback pressure, improve rapidity, stability and the accuracy of flow system flow, pressure response, is those skilled in the art's technical issues that need to address.
Summary of the invention
The first purpose of the present invention is to provide a kind of Multifunctional three-way valve flow control valve.This control valve can be eliminated the impact of feedback pressure fluctuation on the three-way flowrate recuperation valve, thereby eliminate the shake that produces in actuator's opening process, creep, eliminate simultaneously the impact that produces in actuator's stopped process, fine motion in enhancement engineering mechanical-hydraulic actuator opening process and the stability in stopped process, the Safety performance of raising engineering machinery.
The second purpose of the present invention is to provide a kind of construction machinery hydraulic system that is provided with described Multifunctional three-way valve flow control valve.
In order to realize above-mentioned the first purpose, the invention provides a kind of Multifunctional three-way valve flow control valve, comprising:
The three-way flowrate recuperation valve, it has filler opening, oil outlet and pressure feedback hydraulic fluid port; Also comprise:
The feedback pressure pressure maintaining valve, be located at the pressure feedback oil circuit of described three-way flowrate recuperation valve;
Pressure controlled valve, its filler opening is communicated with the pressure feedback hydraulic fluid port of described three-way flowrate recuperation valve, and oil outlet is communicated with the oil outlet of described three-way flowrate recuperation valve.
Preferably, described feedback pressure pressure maintaining valve is included in the first one-way valve, the second one-way valve and first throttle valve in parallel on oil circuit;
The flow direction that described the first one-way valve and the second one-way valve allow hydraulic oil to pass through is opposite.
Preferably, the filler opening of described pressure controlled valve is in series with the second throttle valve.
Preferably, the filler opening of described three-way flowrate recuperation valve is communicated with filler opening and the oil outlet of valve body;
The oil outlet of described three-way flowrate recuperation valve is communicated with return opening and the pilot pressure hydraulic fluid port of valve body.
For realizing above-mentioned the second purpose, the invention provides a kind of construction machinery hydraulic system, the flow control valve that comprises oil hydraulic pump, selector valve, actuator and be located at described selector valve oil-feed oil circuit, described flow control valve are the described Multifunctional three-way valve flow control valve of above-mentioned any one.
Preferably, described selector valve is the load-sensitive multiple directional control valve.
Preferably, be specially Mobile hoisting machine hydraulic system, excavator hydraulic system or pump truck hydraulic system of pump.
Multifunctional three-way valve flow control valve provided by the present invention, further be provided with feedback pressure pressure maintaining valve and pressure controlled valve on the basis of three-way flowrate recuperation valve, during work, effect by the three-way flowrate recuperation valve, regulate the required total discharge of hydraulic actuator, effect by the load feedback pressure stabilized valve, improve the stability of flow system flow and pressure, improve simultaneously the fine motion characteristic of system, reduce the impact of hydraulic system, prevent the hydraulic system overload by pressure controlled valve, improved the Safety performance of hydraulic system.
In a kind of preferred version, described feedback pressure pressure maintaining valve is composed in parallel by the first one-way valve, the second one-way valve and first throttle valve, and wherein the flow direction of the first one-way valve and the second one-way valve is opposite.The tactic pattern that this one-way valve is in parallel with throttle valve, can improve the response time of three-way flowrate recuperation valve, fine motion characteristic and the stability of a system of raising system, by further at the filler opening of pressure controlled valve series connection the second throttle valve, can form " G type π bridge liquid resistance network ", improve the stability of spring chamber pressure, spring chamber pressure is not changed with the variation of spillway discharge, so just can stablize the displacement amount of three-way flowrate recuperation valve valve rod, make actuator not be subjected to the variation of outer load and change, improving the stability of system.
The above-mentioned Multifunctional three-way valve flow control valve of construction machinery hydraulic system application provided by the invention, can prevent effectively that the execution architecture in crack mouth situation from shaking, creeping, and improves Security, the reliability of hydraulic system.
Description of drawings
Fig. 1 is the hydraulic schematic diagram of a kind of embodiment of Multifunctional three-way valve flow control valve provided by the present invention.
In figure:
1. three-way flowrate recuperation valve 2. feedback pressure pressure maintaining valve 3. pressure controlled valve 2-1. first one-way valve 2-2. the second one-way valve 2-3 first throttle valve 4. second throttle valve
Embodiment
Core of the present invention is to eliminate the impact of feedback pressure fluctuation on the three-way flowrate recuperation valve, eliminate the shake that produces in actuator's opening process, creep, eliminate simultaneously the impact that produces in actuator's stopped process, thereby the fine motion in enhancement engineering mechanical-hydraulic actuator opening process and the stability in stopped process, the Safety performance of raising engineering machinery.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 is the hydraulic schematic diagram of a kind of embodiment of Multifunctional three-way valve flow control valve provided by the present invention.
In a kind of embodiment, Multifunctional three-way valve flow control valve provided by the invention comprises feedback pressure adjusting part, three-way flowrate control section, feedback pressure control section, mainly three-way flowrate recuperation valve 1, feedback pressure pressure maintaining valve 2 and pressure controlled valve 3, consists of.
Three-way flowrate recuperation valve 1 has filler opening, oil outlet and pressure feedback hydraulic fluid port, and its filler opening is communicated with oil inlet P 1 and the oil outlet P2 of valve body, and oil outlet is communicated with oil return inlet T 1 and the pilot pressure hydraulic fluid port K1 of valve body.
Feedback pressure pressure maintaining valve 2 is located at the pressure feedback oil circuit of three-way flowrate recuperation valve 1.Particularly, the first one-way valve 2-1, the second one-way valve 2-2 and first throttle valve 2-3 parallel connection on oil circuit, consist of, wherein, the flow direction that the first one-way valve 2-1 and the second one-way valve 2-2 allow hydraulic oil to pass through is opposite.
The filler opening of pressure controlled valve 3 is communicated with the pressure feedback hydraulic fluid port of three-way flowrate recuperation valve 1, and oil outlet is communicated with the oil outlet of three-way flowrate recuperation valve 1, and at filler opening, is in series with the second throttle valve 4.
The present embodiment adopts three-way flowrate recuperation valve structure, adopt simultaneously two one-way valves and throttle valve to form feedback pressure pressure maintaining valve 2 to control the aperture of three-way flowrate recuperation valve 1, pressure controlled valve 3 is used for the maximum pressure of control load, the Security of raising system, simultaneously, make all the time three-way flowrate recuperation valve 1 be in stable state, thereby eliminate shake in crack mouthful of state of actuator and stopped process, creep and impact, reach the purpose of smooth operation, its working principle is as follows:
When system has pressure feedback, feedback pressure is at first fast by the first one-way valve 2-1 in feedback pressure pressure maintaining valve 2, three-way flowrate recuperation valve 1 is responded fast, then, feedback pressure is by the first throttle valve 2-3 in feedback pressure pressure maintaining valve 2, feedback pressure is fluctuateed in small scope, reduced the pressure surge scope, act on three-way flowrate recuperation valve 1, feedback pressure is through the effect of " G type π bridge liquid resistance network ", and the feedback pressure that acts on three-way flowrate recuperation valve 1 spring chamber is not changed with the variation of the spillway discharge of relief valve; Thereby make three-way flowrate recuperation valve 1 be in stable state under the effect of spring force, hydraulic power, system pressure and feedback pressure, reach the purpose of stable system flow and pressure, prevented actuator shake, creep, improved security of system and reliability.
Work is complete when actuator, three-way flowrate recuperation valve 1 spring chamber pressure is by the second quick release pressure of one-way valve 2-2 in feedback pressure pressure maintaining valve 2, then, 2-3 makes valve core reset by the first throttle valve, increased the stationarity of system, reduce the impact of hydraulic system and actuator, improved the Security of system.
During the maximum pressure that arranges higher than pressure controlled valve 3 when the feedback pressure by feedback pressure pressure maintaining valve 2, pressure controlled valve 3 is opened, and makes system pass through 1 off-load of three-way flowrate recuperation valve, the Security that has improved system.
As seen, the present invention dynamically changes feedback pressure and acts on the active force of three-way flowrate recuperation valve 1 end, avoid on spool travel occurring larger pressure, flowed fluctuation, improved the stability of system feedback pressure, reduced the impact of the fluctuation of pressure on system pressure and flow, stability, the reliability of hydraulic system have been increased, simultaneously, flow system flow modulating valve, system unloaded and pressure controlled high unity have been realized, opened up the use function of hydraulic element, reduce system bulk and cost, improved hydraulic element and space availability ratio.
Certainly, above-described embodiment is only preferred version of the present invention, specifically is not limited to this, can make according to actual needs pointed adjustment on this basis, thereby obtains different mode of executions., because mode in the cards is more, just illustrate no longer one by one here.
Except above-mentioned Multifunctional three-way valve flow control valve, the present invention also provides a kind of construction machinery hydraulic system, comprise oil hydraulic pump, selector valve, actuator and the flow control valve of being located at selector valve oil-feed oil circuit, wherein flow control valve is Multifunctional three-way valve flow control valve mentioned above, all the other structures please refer to prior art, and this paper repeats no more.
Be specifically as follows Mobile hoisting machine hydraulic system, excavator hydraulic system or pump truck hydraulic system of pump preferably, particularly selector valve is the above-mentioned hydraulic system of load-sensitive multiple directional control valve.
Above Multifunctional three-way valve flow control valve provided by the present invention and construction machinery hydraulic system are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand core concept of the present invention.Should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (7)
1. Multifunctional three-way valve flow control valve comprises:
Three-way flowrate recuperation valve (1), it has filler opening, oil outlet and pressure feedback hydraulic fluid port; It is characterized in that, also comprise:
Feedback pressure pressure maintaining valve (2), be located at the pressure feedback oil circuit of described three-way flowrate recuperation valve (1);
Pressure controlled valve (3), its filler opening is communicated with the pressure feedback hydraulic fluid port of described three-way flowrate recuperation valve (1), and oil outlet is communicated with the oil outlet of described three-way flowrate recuperation valve (1).
2. Multifunctional three-way valve flow control valve according to claim 1, is characterized in that, described feedback pressure pressure maintaining valve (2) is included in the first one-way valve (2-1), the second one-way valve (2-2) and first throttle valve (2-3) in parallel on oil circuit;
The flow direction that described the first one-way valve (2-1) and the second one-way valve (2-2) allow hydraulic oil to pass through is opposite.
3. Multifunctional three-way valve flow control valve according to claim 2, is characterized in that, the filler opening of described pressure controlled valve (3) is in series with the second throttle valve (4).
4. the described Multifunctional three-way valve flow control valve of according to claim 1 to 3 any one, is characterized in that, the filler opening of described three-way flowrate recuperation valve (1) is communicated with filler opening and the oil outlet of valve body;
The oil outlet of described three-way flowrate recuperation valve (1) is communicated with return opening and the pilot pressure hydraulic fluid port of valve body.
5. construction machinery hydraulic system, the flow control valve that comprises oil hydraulic pump, selector valve, actuator and be located at described selector valve oil-feed oil circuit, it is characterized in that, described flow control valve is the claims 1 to the 4 described Multifunctional three-way valve flow control valves of any one.
6. construction machinery hydraulic system according to claim 5, is characterized in that, described selector valve is the load-sensitive multiple directional control valve.
7. construction machinery hydraulic system according to claim 6, is characterized in that, is specially Mobile hoisting machine hydraulic system, excavator hydraulic system or pump truck hydraulic system of pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310353671.1A CN103398038B (en) | 2013-08-14 | 2013-08-14 | Multifunctional three-way flow control valve and construction machinery hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310353671.1A CN103398038B (en) | 2013-08-14 | 2013-08-14 | Multifunctional three-way flow control valve and construction machinery hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103398038A true CN103398038A (en) | 2013-11-20 |
| CN103398038B CN103398038B (en) | 2016-04-27 |
Family
ID=49561729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310353671.1A Active CN103398038B (en) | 2013-08-14 | 2013-08-14 | Multifunctional three-way flow control valve and construction machinery hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103398038B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105751848A (en) * | 2016-03-24 | 2016-07-13 | 中国北方车辆研究所 | Energy accumulator vibration attenuation valve group with locking function |
| CN105840574A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Load-sensitive multi-way valve and hydraulic system of engineering machine |
| CN105840570A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | First link of load-sensitive multi-way valve and multi-way valve |
| CN105840573A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Valve body of first link of load-sensitive multi-way valve and first link of load-sensitive multi-way valve |
| CN105882346A (en) * | 2016-03-24 | 2016-08-24 | 中国北方车辆研究所 | Principal pressure control valve unit for metering pump |
| CN109139626A (en) * | 2018-11-05 | 2019-01-04 | 长沙中联恒通机械有限公司 | A kind of meet an urgent need removes receipts hydraulic system and its engineering machinery |
| CN111059087A (en) * | 2019-12-23 | 2020-04-24 | 中联重科股份有限公司 | Power distribution hydraulic system and crane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4244276A (en) * | 1979-07-16 | 1981-01-13 | Teijin Seiki Company Limited | Hydraulic circuit |
| CN202732521U (en) * | 2012-07-24 | 2013-02-13 | 徐工集团工程机械股份有限公司 | Flow control valve, flow control device and hydraulic oil cooling system |
| CN103015725A (en) * | 2012-12-05 | 2013-04-03 | 中联重科股份有限公司 | Boom hydraulic system, control method thereof, boom system and concrete pumping equipment |
-
2013
- 2013-08-14 CN CN201310353671.1A patent/CN103398038B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4244276A (en) * | 1979-07-16 | 1981-01-13 | Teijin Seiki Company Limited | Hydraulic circuit |
| CN202732521U (en) * | 2012-07-24 | 2013-02-13 | 徐工集团工程机械股份有限公司 | Flow control valve, flow control device and hydraulic oil cooling system |
| CN103015725A (en) * | 2012-12-05 | 2013-04-03 | 中联重科股份有限公司 | Boom hydraulic system, control method thereof, boom system and concrete pumping equipment |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840574A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Load-sensitive multi-way valve and hydraulic system of engineering machine |
| CN105840570A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | First link of load-sensitive multi-way valve and multi-way valve |
| CN105840573A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Valve body of first link of load-sensitive multi-way valve and first link of load-sensitive multi-way valve |
| CN105840574B (en) * | 2015-01-16 | 2018-04-06 | 徐工集团工程机械股份有限公司 | Load sensing multi-way valve and construction machinery hydraulic system |
| CN105840570B (en) * | 2015-01-16 | 2018-05-29 | 徐工集团工程机械股份有限公司 | A kind of load sensing multi-way valve first and multi-way valve |
| CN105751848A (en) * | 2016-03-24 | 2016-07-13 | 中国北方车辆研究所 | Energy accumulator vibration attenuation valve group with locking function |
| CN105882346A (en) * | 2016-03-24 | 2016-08-24 | 中国北方车辆研究所 | Principal pressure control valve unit for metering pump |
| CN105882346B (en) * | 2016-03-24 | 2018-07-27 | 中国北方车辆研究所 | Constant displacement pump main pressure control valve group |
| CN105751848B (en) * | 2016-03-24 | 2018-08-21 | 中国北方车辆研究所 | Accumulator vibration damping valve group with blocking function |
| CN109139626A (en) * | 2018-11-05 | 2019-01-04 | 长沙中联恒通机械有限公司 | A kind of meet an urgent need removes receipts hydraulic system and its engineering machinery |
| CN111059087A (en) * | 2019-12-23 | 2020-04-24 | 中联重科股份有限公司 | Power distribution hydraulic system and crane |
| CN111059087B (en) * | 2019-12-23 | 2021-07-30 | 中联重科股份有限公司 | Power distribution hydraulic system and crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103398038B (en) | 2016-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103398038B (en) | Multifunctional three-way flow control valve and construction machinery hydraulic system | |
| CN106759621B (en) | Load-sensitive formula loading machine determines variable delivery hydraulic system | |
| CN102030293A (en) | Elevated operation vehicle and platform leveling hydraulic system thereof | |
| CN201843848U (en) | Pressure-compensated valve, load sensitive hydraulic system and crane using pressure-compensated valve | |
| CN102296665B (en) | Excavator hydraulic system carrying load sensing main valve and positive flow pump | |
| CN102628459B (en) | Multi-oil-cylinder synchronous control system and engineering vehicle | |
| CN102996391A (en) | Load-sensitive pump, load-sensitive hydraulic system and concrete pumping device | |
| CN203113416U (en) | High-precision hydraulic control system | |
| CN103085865A (en) | Load sensitive turning hydraulic system of loading machine | |
| CN102588357A (en) | Load sensitive hydraulic system and crane with hydraulic system | |
| CN105134678A (en) | Pilot control valve block, core opening and closing hydraulic system and engineering machine | |
| CN104235102A (en) | Upper hydraulic system and engineering machinery | |
| CN103807236B (en) | Valve control unit loads mouth independently controls multi-cylinder assignment of traffic hydraulic system | |
| CN104176639B (en) | Become constant pressure network hydraulic system, hydraulic control method and crane | |
| CN103912531B (en) | Loader load sensing distributing valve | |
| CN107477160B (en) | Hydraulic speed regulation system and engineering machinery | |
| CN203532374U (en) | Crane and power hydraulic system thereof | |
| CN203770261U (en) | Fire truck and getting-on and getting-off switching system thereof | |
| CN107725504B (en) | Hydraulic system capable of providing proper performance for load and hydraulic control method | |
| CN103132557A (en) | Excavator and priority control loop of excavator | |
| CN103982482A (en) | Crane, telescopic arm control system of crane and balance valve | |
| CN203926197U (en) | A kind of for the anti-hydraulic shock relief valve of load-transducing | |
| CN104653536B (en) | A kind of load-sensitive valve | |
| CN102900716B (en) | Feedback speed regulation device and engineering machinery | |
| CN103256334A (en) | Double-action hydraulic oil cylinder tractor suspension hydraulic system based on electromagnetic digital 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 |