CN102032233A - Multifunctional proportional multi-way valve - Google Patents
Multifunctional proportional multi-way valve Download PDFInfo
- Publication number
- CN102032233A CN102032233A CN2011100030179A CN201110003017A CN102032233A CN 102032233 A CN102032233 A CN 102032233A CN 2011100030179 A CN2011100030179 A CN 2011100030179A CN 201110003017 A CN201110003017 A CN 201110003017A CN 102032233 A CN102032233 A CN 102032233A
- Authority
- CN
- China
- Prior art keywords
- valve
- way valve
- controller
- control
- proportional
- 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
Landscapes
- Servomotors (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a multifunctional proportional multi-way valve. Multiple six-way valves controlled by proportional pilot valves are connected in parallel, and the parallel six-way valves, shuttle valves, a controller, a transport oil pipe and a connecting circuit form a system; a maximum load is selected for load sensitive control through the multi-stage shuttle valves; and the operations of the six-way valves are controlled by controlling the proportional pilot valves to form a closed loop for pressure compensation. The invention provides two proportional control methods. The multifunctional proportional multi-way valve simplifies the oil passage of a hydraulic system, reduces the number of hydraulic elements, is simple and convenient for operation of a main machine, improves the efficiency and work precision, and has significance for realizing automatic and intelligent operation of the hydraulic system.
Description
Technical field
The invention belongs to machinery valve and manufacture and design the field, relate in particular to a kind of multifunction multipath valve and manufacture and design the field.
Background technique
Maximize, intelligent, energy-efficient be the important directions of industry main frames development such as engineering machinery and hoist, mainframe has proposed requirements at the higher level to the hydraulic element of its supporting high-pressure high-flow, multi-way valve is as the core parts of host hydraulic system, and its performance and control mode directly influence machine performance.But, the hydraulic element of these main frame key component-hydraulic systems, as development such as multi-way valve, oil hydraulic pump and the main frame development is serious disconnects, especially high pressure, big flow, the contour performance hydraulic element of comprehensive function, its technology also needs further raising.
At present, the developing direction of big machinery hydraulic element and system is: (1) is developed to high pressure, big flow: the specific power height makes complete machine compacter; (2) adopt and represent that the advanced person is handling, the technology of energy saving: as (3) such as load pressure compensation, load-sensitive, positive and negative flow control techniques in conjunction with microelectronic and Computer Control Technology, as electric-hydraulic proportion, electric liquid load compensation and electric liquid load-sensitive technology and the double spool control technique independently controlled based on load port.
For control accuracy and the energy saving that has further improved multi-way valve, and make the automation of main frame and intellectuality higher, each main frame and hydraulic element research and production field drop into strength one after another to multi-way valve, especially high performance multi-way valve product is developed, how to improve multi-way valve performance, particularly electric-hydraulic proportion, electric liquid load compensation and electric liquid load-sensitive technology and be to be badly in need of the problem that to solve based on the double spool control technique that load port is independently controlled.
Summary of the invention
The invention discloses a kind of multifunction multipath valve, the problem to be solved in the present invention provides a kind of multi-way valve system, cooperates control system to realize load-sensitive control, pressure compensation control function and proportional control manual, electronic, that surge.
The present invention is achieved through the following technical solutions:
A kind of multifunction ratio multi-way valve comprises six logical multi-way valve, pilot valve, shuttle valve, controller, transmission oil pipe and connecting circuit, it is characterized in that: described system has at least two 6 logical multi-way valve to compose in parallel; The per six logical proportional pilot valves of multi-way valve carry out guide's control; Between actuator port of each connection shuttle valve is installed respectively, is connected with multistage shuttle valve with each connection actuator port shuttle valve and selects maximum load and carry out load-sensitive to the Ls mouth and control.
Further described per six logical multi-way valve are equipped with a displacement transducer, and displacement transducer is passed to displacement signal on the controller of proportional pilot valve; At each connection pressure hydraulic fluid port a pressure transducer is installed, pressure transducer is passed to the pressure signal of pressure hydraulic fluid port on the controller of proportional pilot valve; After the controller of proportional pilot valve receives displacement transducer and pressure sensor signal, respectively join six logical multi-way valve action formation closed loops by the control of control ratio pilot valve and carry out pressure compensation.
Further described proportional pilot valve comprises guide's electric-hydraulic proportion directional flow valve and manual ratio-voltage control valve; Proportion electro-magnet is adorned at guide's electric-hydraulic proportion directional flow valve two ends respectively, the proportion electro-magnet proportional control of surging that links to each other with controller; Manually the ratio-voltage control valve has comprised handle, spring and potentiometer, and potentiometer is connected with controller and carries out manual proportional control.
Another proportional control controlling schemes is that proportional pilot valve comprises guide proportion reduction valve and manual ratio-voltage control valve; The guide proportion reduction valve is adorned proportion electro-magnet respectively, the proportion electro-magnet proportional control of surging that links to each other with controller; Manually the ratio-voltage control valve has comprised handle, spring and potentiometer, and potentiometer is connected with controller and carries out manual proportional control.
Described system also has a meta drainback passage, and drainback passage is connected with the pump fuel tank with per six logical multi-way valve.
Described controller can be shared one of independent respectively that use or each proportional pilot valve of each proportional pilot valve.
The realization of described load-sensitive function is that LS is transferred to variable displacement pump with this signal by the load sensing controlled mouth, is used for controlled variable pump delivery pressure or flow by multistage shuttle valve group acquisition system maximum load, realizes load-sensitive control.
Because main frames such as engineering machinery or hoist have a plurality of actuators usually, these mechanisms need coordination, and these movement speedes promptly should have pressure compensation in case setting is not influenced by load should, and be independent of each other.This multi-way valve has been realized pressure compensation by the closed loop control of employing ratio.Because electro-hydraulic proportional valve has lot of superiority, it can simple automatically controlled realization continuously, the power and the speed of ratio ground controlled hydraulic system.And can simplify the oil circuit of hydraulic system greatly and reduce the quantity of hydraulic element.To simplifying host service function, raise the efficiency and realizing that automation, intelligent operation all have extremely important meaning with homework precision.Along with the performance of electro-hydraulic proportional valve and PLC controller further improves and uses increasingly extensive, technical merit, the market competitiveness of main computer boxes are improved more, make main frame developing faster to high efficiency, energy-conservationization, automation, informationization, intelligentized direction.This multi-way valve is just by adopting pilot-actuated valve to realize manually, surged and proportional control.
Helpfulness of the present invention: the invention provides a kind of novel multi-way valve structure, Proportional valve combination by multi-joint guide control, adopt closed loop control, not only have load-sensitive control, a pressure compensation control function, and realized manual, surge, proportional control.The present invention simplifies the oil circuit of hydraulic system, reduces the quantity of hydraulic element, easy host service function, has improved efficient and homework precision, to realizing hydraulic system automation, intelligent operation extremely important meaning is arranged all.
Description of drawings
The present invention is further described below in conjunction with embodiment and description of drawings.
Fig. 1 is a multi-way valve principle schematic of the present invention;
Fig. 2 is the proportional pilot valve schematic representation that is made of guide's electric-hydraulic proportion directional flow valve;
Fig. 3 is the proportional pilot valve schematic representation that is made of the guide proportion reduction valve;
Fig. 4 is the shuttle valve group connection diagram of three multi-way valve.
Among the figure, 1,9 and 21 be the multi-way valve system respectively join multi-way valve, 2,5,6,19 and 20 is shuttle valves, 3 and 8 is actuators, and 4 and 7 is pressure transducers, the 10th, and variable displacement pump, the 11st, guide's electric-hydraulic proportion directional flow valve, the 12nd, proportion electro-magnet, the 13rd, handle, the 14th, spring, the 15th, potentiometer, the 16th, controller, 17 and 18 is guide proportion reduction valve, A1, A2, A3, B1, B2 and B3 respectively join actuator port, P1, P2 and P3 are the load hydraulic fluid ports of each connection, P is the multi-way valve filler opening, a1, b1, a2, b2, a3 and b3 are secondary guide hydraulic fluid ports, and T is the multi-way valve return opening, Ps is guide's oil feeding line, P1e be P1 through pressure transducer 4 signals converted, P2e be P2 through pressure transducer 7 signals converted, Ls is that the load-sensitive signal (is P1, the maximum value of P2 etc.).
Embodiment
The present invention is further described below in conjunction with embodiment.Embodiment is used to illustrate the present invention, does not limit the present invention in any way.
In conjunction with Fig. 1 to Fig. 3.
Fig. 1 is the multi-way valve principle schematic, and Fig. 2 is the proportional pilot valve schematic representation that guide's electric-hydraulic proportion directional flow valve constitutes, and Fig. 3 is the proportional pilot valve schematic representation that is made of the guide proportion reduction valve, and Fig. 4 is the shuttle valve group connection diagram of three multi-way valve.The element that comprises in two chain line constitutes multi-way valve of the present invention.
This multi-way valve is by six logical multi-way valve (main valve) formation in parallel more than two, and every multi-way valve (main valve) comprises a proportional pilot valve again, and it is carried out guide's control.This valve has increased a meta drainback passage than traditional selector valve, make that the flow of pump output can pass through the direct oil sump tank of this oil circuit and off-load when each connection guiding valve all is in meta, after any commutation, the capital cuts off this oil circuit, makes fluid enter corresponding executive component.One shuttle valve 2 and shuttle valve 6 all are installed respectively between actuator port A1, the B1 of each executive component and A2, B2, load p 1 and P2 that can each executive component of perception, P1 and P2 select maximum load to the Ls mouth by shuttle valve 5 again, and each main valve plug is equipped with a bit shift displacement sensor.Displacement transducer converts displacement signal on the amplifier that electrical signal is passed to proportional pilot valve to.At P1, the P2 mouth is installed a pressure transducer 4, pressure transducer 7 respectively, and pressure transducer is P1, and the pressure of P2 mouth converts on the controller that electrical signal P1e, P2e be passed to proportional pilot valve.
Proportional pilot valve has comprised guide's electric-hydraulic proportion directional flow valve, manual ratio-voltage control valve, controller etc.Proportion electro-magnet 12 is adorned at guide's electric-hydraulic proportion directional flow valve two ends respectively, and this guide's electric-hydraulic proportion directional flow valve also can be made up of the independently proportional pressure-reducing valve of two identical functions, as shown in Figure 3.Proportion electro-magnet 12 links to each other with controller.Manually the ratio-voltage control valve has comprised handle 13, spring 14 and potentiometer 15 etc.Potentiometer is connected with controller, and potentiometer becomes the signal of Joystick into electrical signal and is defeated by controller.
The multifunction multipath valve that this is routine comprises that the element in the two chain line of Fig. 1 constitutes.Comprised six logical multi-way valve 1,9 more than two, and be connected in parallel, every multi-way valve 1 or 9 comprises a proportional pilot valve again, and six logical multi-way valve are carried out guide's control.Proportional pilot valve has comprised guide's electric-hydraulic proportion directional flow valve 11, this valve also can be made up of the independently proportional pressure-reducing valve 17 and 18 of two identical functions, between the actuator port of relevant each connection one shuttle valve 2,6 is installed respectively all, select maximum load by shuttle valve 5 and be used for load-sensitive control to the Ls mouth, Ls is the abbreviation of load sense, expression load-sensitive effect can adopt more shuttle valve quantity when multi-joint.
Per six logical multi-way valve 1 or 9 cores are equipped with a displacement transducer, and displacement transducer converts displacement signal on the controller 16 that electrical signal is passed to proportional pilot valve separately to.At six logical multi-way valve 1 pressure hydraulic fluid port P1 a pressure transducer 4 is installed, at six logical multi-way valve 9 pressure hydraulic fluid port P2 a pressure transducer 7 is installed, pressure transducer 4 and pressure transducer 7 convert the pressure of pressure hydraulic fluid port P1 and P2 to electrical signal P
1e, P
2eBe passed to separately respectively on the controller 16 of proportional pilot valve.After displacement transducer and pressure transducer are defeated by controller 16 with electrical signal, controller 16 will be exported corresponding SC sigmal control six logical multi-way valve 1 or 9 actions, form closed loop, realize pressure compensation.
Proportional pilot valve has comprised guide's electric-hydraulic proportion directional flow valve 11 or guide proportion reduction valve 17 and 18, manually ratio-voltage control valve, controller 16 etc.Proportion electro-magnet 12 is adorned at guide's electric-hydraulic proportion directional flow valve 11 two ends respectively, and this valve also can be made up of the independently proportional pressure-reducing valve 17 and 18 of two identical functions, and each proportional pressure-reducing valve also is equipped with a proportion electro-magnet 12 respectively.Proportion electro-magnet 12 links to each other with controller 16.Manually the ratio-voltage control valve has comprised handle 13, spring 14 and potentiometer 15 etc.Potentiometer 15 is connected with controller 16, and potentiometer 15 becomes the signal of Joystick 13 into electrical signal and is defeated by controller 16.Manual, the electronic proportional control or the proportional control of surging have been realized.
This routine multifunction multipath valve has a meta drainback passage, make that the flow of pump output can pass through the direct oil sump tank of this oil circuit and off-load when each connection guiding valve all is in meta, after any commutation, the capital cuts off this oil circuit, makes fluid enter corresponding executive component.
Each proportional pilot valve is all supporting by corresponding controller 16.Also can a shared controller 16.
Be not only limited to two six logical parallel connection types based on this multi-way valve control principle system.As three when in parallel, the function of shuttle valve 5 just needs to adopt the shuttle valve group that is made of a plurality of shuttle valves to select the pressure of maximum load in twos after relatively.With three is example: the Placement of multistage shuttle valve group such as Fig. 4, first and second working pressure through shuttle valve 5 select after relatively maximum value MAX (P1, P2), the 3rd multi-way valve 21 is selected the 3rd load p 3 by shuttle valve 20; MAX (P1, P2) with P3 by shuttle valve 19 select again after relatively MAX (P1, P2, P3)---this signal is by the output of LS mouth, and six more multi-joint logical parallel systems by that analogy.
Engineering machinery or hoist usually by one or more oil hydraulic pumps respectively to a plurality of actuator element motor or oil hydraulic cylinder fuel feeding, need to adopt by multi-joint multi-way valve.Multi-way valve is made up of the directional flow valve of a plurality of proportional control, this example is that example describes with two, this routine multi-way valve is that six logical multi-way valve are connected in parallel, this valve has increased a meta drainback passage than traditional selector valve, make that the flow of pump output can pass through the direct oil sump tank of this oil circuit and off-load when each connection guiding valve all is in meta, after any commutation, the capital cuts off this oil circuit, makes fluid enter corresponding executive component.This class valve has flow and pressure fine setting characteristic, and can combine with minus flow, positive flow control etc., can be in the engineering extensive use.Multi-way valve is by the moving direction and the speed of per six logical multi-way valve difference control actuating component.The guide that the action of six logical multi-way valve is exported by proportional pilot valve controls fluid and controls.In order to improve control accuracy, six logical multi-way valve have the displacement transducer and the proportional pilot valve that reflect valve core opening degree and constitute closed loop control.In addition, each joins the work (as A1 or B1 mouth) of six logical multi-way valve by the shared pressure sensing mouth of shuttle valve, this pressure sensing mouth has been installed pressure transducer, the pressure signal that pressure transducer will react load converts electrical signal to, give the controller of proportional pilot valve by closed loop feedback, after relatively, controller will be exported corresponding electrical signal control ratio pilot valve, proportional pilot valve (a1, b1) the corresponding hydraulic oil control of output main valve plug opening, load variations is used for multistage inter-stage feedback, even also can not cause the variation by the main valve flow, be whenever all can realize pressure compensation, and each executive component is independent mutually, be independent of each other, several actuators of independent manipulation simultaneously are based on this principle, as long as the precision of this valve is enough, just can be easy to realize high-precise synchronization control.Because this multi-way valve respectively joins the actuator pressure that valve is controlled by the perception of shuttle valve group, and select maximum pressure after relatively in twos,, be used for the pressure or the flow of control pump output fluid, realize the load-sensitive Energy Saving Control by load-sensitive mouth Ls through shuttle valve.
At present, the hydraulic system of mainframes such as homemade engineering machinery or truck crane adopts hand-operated direction valve mostly, during commutation, moves the selector valve handle and will overcome selector valve interior spring force, the power of surging, friction.In particular for guaranteeing that selector valve resets smoothly, the spring force of selector valve designs very greatly, even the lever ratio of selector valve operating handle is done very greatly, works long hours, and it is uncomfortable that the operator still feels.Particularly all the more so during high-pressure high-flow.So this routine control section adopted proportional pilot valve control, integrated manually, surge, electric proportional control various control function, laborsaving, good operability.As Fig. 2, this proportional pilot valve mainly is made up of guide's electric-hydraulic proportion directional flow valve, manual ratio-voltage control valve and controller.
Manually control basic principle: handle converts manual ringing to electrical signal by the potentiometer of manual ratio-voltage control valve, after the controller amplification, output current signal is to the proportion electro-magnet of guide's electric-hydraulic proportion directional flow valve, proportion electro-magnet ouput force and displacement, control guide electric-hydraulic proportion directional flow valve output control corresponding fluid is to main valve, the action of promotion main valve plug realizes fluid power control multi-way valve main valve events, output corresponding work fluid.
Concrete enforcement thinking is as follows: manual ratio-voltage control valve left and right sides four direction is forwards, backwards moved.The angle difference of moving, manually ratio-voltage control valve lower end potentiometer is issued the strong and weak difference of the voltage signal of proportion electro-magnet, be defeated by the proportion electro-magnet of guide's electric-hydraulic proportion directional flow valve after controller acceptance and the amplification, produce the displacement-force characteristic of respective horizontal.It is proportional that this opening amount that just makes guide's electric-hydraulic proportion directional flow valve and the manual handle of ratio-voltage control valve are moved angle, makes proportional pilot valve export corresponding fluid fluid power and promote main valve, and main valve is exported the work fluid of certain flow in proportion.Because be potentiometer below the ratio-voltage control valve handle manually, moving handle is compression reseting spring, so very light.Because through electricity, the multistage power amplification of liquid, the power of surging that can overcome preferably on the main valve plug is disturbed, and has higher stable nargin when load variations.Because the friction on proportional pilot valve and the main valve directly influences stagnant ring, control accuracy, dead band and the dynamic response performance of control characteristic, thereby hoist performance such as control accuracy, stability, fine motion, net synchronization capability etc. are exerted an influence, this programme intends adopting the height response highi degree of accuracy proportion directional valve that has the inter-stage feedback between pilot stage and main, the sensor of high response etc. to improve precision, and apply the chatter signal by controller and convert static friction power to dyanainic friction power and can address this problem effectively, realize dynamically good and static properties.
In addition, this scheme multi-way valve can be connected with SC system controller by the controller of self, the control program coordination is pressed in each action of assurance engineering machinery and hoist, realize digitizing, at a distance, control even intelligent control automatically, SC system controller is made of existing control system such as the PLC of control system or computers.
The proportional pilot valve of this multi-way valve can also adopt as the guide proportion reduction valve of Fig. 3 to be formed, control thinking and guide's electric-hydraulic proportion directional flow valve are formed all fours, and just structurally guide's electric-hydraulic proportion directional flow 11 is made up of the independently proportional pressure-reducing valve 17,18 of two identical functions.
Claims (6)
1. a multifunction ratio multi-way valve comprises six logical multi-way valve, pilot valve, shuttle valve, controller, transmission oil pipe and connecting circuit, it is characterized in that: described system has at least two 6 logical multi-way valve to compose in parallel; The per six logical proportional pilot valves of multi-way valve carry out guide's control; Between actuator port of each connection shuttle valve is installed respectively, is connected with multistage shuttle valve with each connection actuator port shuttle valve and selects maximum load and carry out load-sensitive to the Ls mouth and control.
2. multifunction ratio multi-way valve according to claim 1 is characterized in that: described per six logical multi-way valve are equipped with a displacement transducer, and displacement transducer is passed to displacement signal on the controller of pilot valve; At each connection pressure hydraulic fluid port a pressure transducer is installed, pressure transducer is passed to the pressure signal of pressure hydraulic fluid port on the controller of pilot valve; After the controller of pilot valve receives displacement transducer and pressure sensor signal, form closed loop by control pilot valve control six logical multi-way valve actions and carry out pressure compensation.
3. multifunction ratio multi-way valve according to claim 2 is characterized in that: described pilot valve comprises guide's electric-hydraulic proportion directional flow valve and manual ratio-voltage control valve; Proportion electro-magnet is adorned at guide's electric-hydraulic proportion directional flow valve two ends respectively, the proportion electro-magnet proportional control of surging that links to each other with controller; Manually the ratio-voltage control valve has comprised handle, spring and potentiometer, and potentiometer is connected with controller and carries out manual proportional control.
4. multifunction ratio multi-way valve according to claim 2 is characterized in that: described pilot valve comprises guide proportion reduction valve and manual ratio-voltage control valve; The guide proportion reduction valve is adorned proportion electro-magnet respectively, the proportion electro-magnet proportional control of surging that links to each other with controller; Manually the ratio-voltage control valve has comprised handle, spring and potentiometer, and potentiometer is connected with controller and carries out manual proportional control.
5. according to each described multifunction ratio multi-way valve of claim 1 to 4, it is characterized in that: described system also has a meta drainback passage, and drainback passage is connected with the pump fuel tank with per six logical multi-way valve.
6. according to each described multifunction ratio multi-way valve of claim 1 to 4, it is characterized in that: described controller can be shared one of independent respectively that use or each pilot valve of each pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003017 CN102032233B (en) | 2011-01-08 | 2011-01-08 | Multifunctional proportional multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003017 CN102032233B (en) | 2011-01-08 | 2011-01-08 | Multifunctional proportional multi-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102032233A true CN102032233A (en) | 2011-04-27 |
| CN102032233B CN102032233B (en) | 2013-05-15 |
Family
ID=43885543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110003017 Expired - Fee Related CN102032233B (en) | 2011-01-08 | 2011-01-08 | Multifunctional proportional multi-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102032233B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312806A (en) * | 2011-08-19 | 2012-01-11 | 陈海波 | Pressure cut-off device of load sensing hydraulic pump of concrete pump truck |
| CN103047208A (en) * | 2012-12-27 | 2013-04-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Load-sensitive electro-hydraulic proportional multi-way valve |
| CN104389579A (en) * | 2014-10-31 | 2015-03-04 | 山河智能装备股份有限公司 | Rotating and boosting EHC (Electric Hydraulic Control) method of rock drilling machine and control circuit for realizing rotating and boosting EHC method |
| CN105179383A (en) * | 2015-09-28 | 2015-12-23 | 北汽福田汽车股份有限公司 | Engineering machinery, hydraulic system for constant displacement pump of engineering machinery and controlling method of hydraulic system |
| CN105402180A (en) * | 2014-08-12 | 2016-03-16 | 徐工集团工程机械股份有限公司 | Proportion multi-way valve, cantilever crane hydraulic control system and concrete pump vehicle |
| CN107477160A (en) * | 2017-08-25 | 2017-12-15 | 潍柴动力股份有限公司 | Hydraulic speed regulation system and engineering machinery |
| CN109973453A (en) * | 2019-04-01 | 2019-07-05 | 广西柳工机械股份有限公司 | Knife plate automatically controls valve group, hydraulic system and Work machine |
| CN110194422A (en) * | 2019-06-25 | 2019-09-03 | 浙江诺和机电股份有限公司 | A kind of electrichydraulic control perseverance pulling force capstan winch of band storage rope device |
| CN110502041A (en) * | 2019-07-22 | 2019-11-26 | 北京控制工程研究所 | A micro-flow control system and method based on piezoelectric proportional valve |
| CN110925257A (en) * | 2019-12-24 | 2020-03-27 | 成都阀智宝数字液压设备有限公司 | A high-speed on-off valve pilot-controlled proportional valve with closed-loop position |
| CN111734698A (en) * | 2020-07-03 | 2020-10-02 | 中国矿业大学 | A time-varying large eccentric load-resisting shunt motor variable-speed synchronization system and its working method |
| CN113090603A (en) * | 2021-03-29 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Pilot proportional control valve device, automatic calibration method, and medium |
| CN113550943A (en) * | 2021-08-12 | 2021-10-26 | 中国铁建重工集团股份有限公司 | Chain cutter tensioning control system and method of roof cutting pressure relief trolley |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5896890A (en) * | 1994-11-06 | 1999-04-27 | Hydrolux S.A R.L. | Pilot-operated servo-valve |
| CN1405458A (en) * | 2002-10-29 | 2003-03-26 | 浙江大学 | Load sensing hydraulic system for controlling six-way multiple unit valve |
| DE20307245U1 (en) * | 2003-05-08 | 2003-08-07 | DBT GmbH, 44534 Lünen | Return valve for a hydraulic cylinder has a connector (5-9) which attached to the valve housing (3) in the hydraulic cylinder (2) in a fixed position parallel to the axis (16) of the cylinder |
| CN1556287A (en) * | 2004-01-07 | 2004-12-22 | 集美大学 | Electro-hydraulic proportional control device |
| CN101429959A (en) * | 2008-12-05 | 2009-05-13 | 太原理工大学 | Electric closed-loop control flow control valve |
-
2011
- 2011-01-08 CN CN 201110003017 patent/CN102032233B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5896890A (en) * | 1994-11-06 | 1999-04-27 | Hydrolux S.A R.L. | Pilot-operated servo-valve |
| CN1405458A (en) * | 2002-10-29 | 2003-03-26 | 浙江大学 | Load sensing hydraulic system for controlling six-way multiple unit valve |
| DE20307245U1 (en) * | 2003-05-08 | 2003-08-07 | DBT GmbH, 44534 Lünen | Return valve for a hydraulic cylinder has a connector (5-9) which attached to the valve housing (3) in the hydraulic cylinder (2) in a fixed position parallel to the axis (16) of the cylinder |
| CN1556287A (en) * | 2004-01-07 | 2004-12-22 | 集美大学 | Electro-hydraulic proportional control device |
| CN101429959A (en) * | 2008-12-05 | 2009-05-13 | 太原理工大学 | Electric closed-loop control flow control valve |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312806A (en) * | 2011-08-19 | 2012-01-11 | 陈海波 | Pressure cut-off device of load sensing hydraulic pump of concrete pump truck |
| CN103047208A (en) * | 2012-12-27 | 2013-04-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Load-sensitive electro-hydraulic proportional multi-way valve |
| CN103047208B (en) * | 2012-12-27 | 2015-02-18 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Load-sensitive electro-hydraulic proportional multi-way valve |
| CN105402180A (en) * | 2014-08-12 | 2016-03-16 | 徐工集团工程机械股份有限公司 | Proportion multi-way valve, cantilever crane hydraulic control system and concrete pump vehicle |
| CN104389579A (en) * | 2014-10-31 | 2015-03-04 | 山河智能装备股份有限公司 | Rotating and boosting EHC (Electric Hydraulic Control) method of rock drilling machine and control circuit for realizing rotating and boosting EHC method |
| CN105179383A (en) * | 2015-09-28 | 2015-12-23 | 北汽福田汽车股份有限公司 | Engineering machinery, hydraulic system for constant displacement pump of engineering machinery and controlling method of hydraulic system |
| CN107477160B (en) * | 2017-08-25 | 2019-07-30 | 潍柴动力股份有限公司 | Hydraulic speed regulation system and engineering machinery |
| CN107477160A (en) * | 2017-08-25 | 2017-12-15 | 潍柴动力股份有限公司 | Hydraulic speed regulation system and engineering machinery |
| CN109973453A (en) * | 2019-04-01 | 2019-07-05 | 广西柳工机械股份有限公司 | Knife plate automatically controls valve group, hydraulic system and Work machine |
| CN110194422A (en) * | 2019-06-25 | 2019-09-03 | 浙江诺和机电股份有限公司 | A kind of electrichydraulic control perseverance pulling force capstan winch of band storage rope device |
| CN110502041A (en) * | 2019-07-22 | 2019-11-26 | 北京控制工程研究所 | A micro-flow control system and method based on piezoelectric proportional valve |
| CN110925257A (en) * | 2019-12-24 | 2020-03-27 | 成都阀智宝数字液压设备有限公司 | A high-speed on-off valve pilot-controlled proportional valve with closed-loop position |
| CN111734698A (en) * | 2020-07-03 | 2020-10-02 | 中国矿业大学 | A time-varying large eccentric load-resisting shunt motor variable-speed synchronization system and its working method |
| CN111734698B (en) * | 2020-07-03 | 2022-04-08 | 中国矿业大学 | Shunt motor speed change synchronization system capable of resisting time-varying large unbalance load and working method |
| CN113090603A (en) * | 2021-03-29 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Pilot proportional control valve device, automatic calibration method, and medium |
| CN113090603B (en) * | 2021-03-29 | 2022-04-05 | 徐州徐工挖掘机械有限公司 | Pilot proportional control valve device, automatic calibration method, and medium |
| US12228152B2 (en) | 2021-03-29 | 2025-02-18 | Xuzhou Xcmg Excavator Machinery Co., Ltd | Pilot proportional control valve apparatus, automatic calibration method and medium |
| CN113550943A (en) * | 2021-08-12 | 2021-10-26 | 中国铁建重工集团股份有限公司 | Chain cutter tensioning control system and method of roof cutting pressure relief trolley |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102032233B (en) | 2013-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102032233B (en) | Multifunctional proportional multi-way valve | |
| CN102296665B (en) | Excavator hydraulic system carrying load sensing main valve and positive flow pump | |
| CN103671335B (en) | Load-sensitive electric proportional multi-loop valve | |
| CN102094434B (en) | System for differential recovery of potential energy of boom of oil liquid hybrid power excavating machine | |
| CN202081450U (en) | Potential energy differential recovery system for moving arm of oil-liquid hybrid power excavator | |
| CN201843848U (en) | Pressure-compensated valve, load sensitive hydraulic system and crane using pressure-compensated valve | |
| CN203516249U (en) | Load-sensitive feedback control system for top drive drilling machine hydraulic pump station | |
| CN103882897A (en) | Loader hydraulic system | |
| CN109235534B (en) | Multi-path hydraulic system of hydraulic excavator | |
| CN106762909A (en) | The hydraulic multitandem valve and its control method of a kind of high-speed switch valve pilot control | |
| CN204284032U (en) | Single actuator automatic switchover rapid movement oil hydraulic circuit | |
| CN104074825A (en) | Two-way selection type convergence load sensing multi-way valve | |
| CN101839264A (en) | Load sensing electro-hydraulic proportional multi-way reversing oil circuit | |
| CN103807236B (en) | Valve control unit loads mouth independently controls multi-cylinder assignment of traffic hydraulic system | |
| CN104314132B (en) | The motor flow hydraulic control circuit of excavator minus flow system and control method | |
| CN204533014U (en) | Ioad-sensing control hydraulic system | |
| CN203948366U (en) | Two-way choice type interflow load-transducing multi-way valve | |
| CN203670337U (en) | Load-sensitive electric proportional multi-way valve | |
| CN102587445A (en) | Load sensing flow control hydraulic system with energy regeneration and conservation | |
| CN103114624B (en) | The load-sensitive control system of loader | |
| CN104675772A (en) | Load sensitive control hydraulic system | |
| CN107503997B (en) | Back pressure and power matching hydraulic hybrid control dual-actuator system | |
| CN201621134U (en) | Electric control hydraulic automatic deloading device of loading machine | |
| CN104912857A (en) | Multi-way valve | |
| CN202346613U (en) | Double-pump load sensing hydraulic system |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 |