CN106678111A - Electrically-controlled multi-way valve - Google Patents
Electrically-controlled multi-way valve Download PDFInfo
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- CN106678111A CN106678111A CN201510750157.0A CN201510750157A CN106678111A CN 106678111 A CN106678111 A CN 106678111A CN 201510750157 A CN201510750157 A CN 201510750157A CN 106678111 A CN106678111 A CN 106678111A
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Abstract
The invention relates to an electrically-controlled multi-way valve which comprises a controller, a plurality of two-stage DDVs and a solenoid valve group. The electrically-controlled multi-way valve is characterized in that the two-stage DDVs comprise DDV1, DDV2, a pressure sensor II, a pressure sensor III, a displacement sensor as well as functional valves such as an unloading valve 1, an unloading valve 2 and a linear travelling valve, wherein the DDV1 is directly connected with the DDV2; the pressure sensors are separately arranged on working pots A and B of the DDV2; the displacement sensor is connected with a valve element of the DDV2; the two-stage DDVs, the unloading valve 1, the unloading valve 2 and the linear travelling valve are separately connected in an oil path in parallel; an output signal of an electrically-controlled handle, the pressure sensors and the displacement sensor is input into a controller through a cable; and the controller emits an instruction to control the DDV1, a pump and the solenoid valve pump. The electrically-controlled multi-way valve adopts an electro-hydraulic servo control technology, replaces a conventional pilot valve through DDVs, performs closed-loop control on the valve element, and realizes rapid dynamic response and precise flow control and distribution according to the needs.
Description
Technical field
The invention belongs to electro-hydraulic servo control technology, and in particular to it is a kind of be mainly used in excavator by
Twin-stage DDV carries out the electric control multi-way valve that servo closed loop is precisely controlled.
Background technology
Banked direction control valves is a critical component in construction machinery hydraulic system, be a kind of collection reversal valve,
Check valve, overflow valve, Fill valve etc. are in the highly integrated multifunction valve of one.Banked direction control valves is main
It is divided into manual multiple-way valve and liquor controlled multipath.Manual multiple-way valve is by being mechanically connected by operation handle
The commutation of valve element is directly controlled, preferably, operation and change replace simple to this kind of control fine motion characteristic,
It is widely used in early stage, but because the labour intensity of manipulator is very big, and flow is by negative
Carrying affects larger, and energy loss is larger, therefore is gradually replaced by liquor controlled multipath.Liquor controlled multipath
Using Hydraulic guide control, mechanical connection is changed into fluid pressure line connection, so not only can be simplified
Topology layout, and hydraulic drive can reduce manipulation strength, also substantially increase operating efficiency,
Therefore obtained commonly used in existing engineering machinery.
At present liquor controlled multipath, the particularly liquor controlled multipath for excavator mainly have minus flow control
System, positive flow control and three kinds of patterns of Ioad-sensing control, wherein inverted flux control and load-sensitive
Control belongs to pure hydraulic feedback control, and positive flow control introduces electric signal control, and it passes through guide
Pressure sensor feedback, electromechanical controller comprehensively remove controlling pump output flow on demand.In configuration aspects,
Positive and negative flow does not need the pressure-compensated valve of load-sensitive, and structure is relatively easy；In energy-saving square
Face, inverted flux control has certain restriction loss with Ioad-sensing control, and positive flow control can
It is very low so that restriction loss to be dropped to, therefore the energy-saving effect of positive flow control is preferable.In operation quality
Aspect, Ioad-sensing control can realize the assignment of traffic unrelated with load pressure, and positive and negative stream
Amount controls its flow and receives load effect, therefore, Ioad-sensing control can preferably coordinate difference
Action, operation quality is substantially better than positive and negative flow control.Because three kinds of controls respectively have its advantage,
Coexist between Ge great main engine plants for the moment.
For further improving performance, banked direction control valves can be reached in terms of energy-conservation and operation quality
Optimum state, and the dynamic response of control is improved, the present invention proposes the electro-hydraulic servo control of banked direction control valves
Technology, i.e., replace traditional hydraulic pilot valve by DDV, and by electric signal the essence to main valve plug is realized
Really closed-loop control, and then precise control and the distribution of flow are realized, reach energy-conservation, action and quickly ring
Should, composite move coordinate purpose, and can realize remote control and wireless remote control etc. automate
Control.
The content of the invention
The purpose of the present invention is：Energy-conservation and operation quality cannot be simultaneous in solve existing multichannel valve technology
The problem of Automated condtrol is turned round and look at, is difficult to, a kind of electric control multi-way valve is proposed.
The technical scheme is that：
Technical scheme proposed by the present invention is：Pilot valve in existing liquor controlled multipath is replaced with DDV,
With reference to positive flow and the advantage of Ioad-sensing control, by the control instruction of controller synthesis electric hand handle
With the displacement signal of valve core displacement sensor feedback, the precise control and flow to valve port opening is realized
Distribution according to need, reach the comfortable coordination for making full use of and operating of energy, at the same pass through controller
Pre-set programs are capable of achieving Automated condtrol.
A kind of electric control multi-way valve, including controller (8), several twin-stages DDV (1), solenoid valve block
(23)；Characterized in that, twin-stage DDV (1) is passed including DDV1 (2), DDV2 (4), pressure
Sensor II (5), pressure sensor III (6), displacement transducer (7) and unloader 1 (9),
The duty valves such as unloader 2 (21), straight travel valve (10), DDV1 (2) and DDV2 (4) is straight
Connect in succession, pressure sensor is loaded on respectively working hole A, B of DDV2 (4), displacement transducer (7)
Be connected with the valve element of DDV2 (4), several twin-stages DDV (1) respectively with unloader 1 (9), unload
During lotus valve 2 (21) and straight travel valve (10) are parallel to oil circuit, electric control handle, pressure sensor
Pass through cable input controller (8) with the output signal of displacement transducer (7), controller sends finger
Order control DDV1 (2), pump and solenoid valve block (23).
DDV1 and DDV2 constitutes twin-stage DDV in the technical program, and wherein each DDV1 is independent
One, and it (can be integral multi-way that DDV2 can be alternatively one or several entirety for independent connection
Valve, alternatively split blade type banked direction control valves).The technical scheme adopts two oil supply systems of positive flow, i.e.,
Need two electrical control hydraulic pumps.General principle of the invention based on positive flow, with straight line moving, unloads
The functions such as lotus, meanwhile, by gathering main valve plug displacement and load pressure and being controlled calculating, make
It has the characteristic of Ioad-sensing control concurrently, you can accomplish the assignment of traffic unrelated with load pressure, tool
There is flow saturation resistance characteristic, so as to have the energy saving of positive flow and the maneuverability of load-sensitive concurrently.
It is an advantage of the invention that：
Electric control multi-way valve of the present invention adopt electro-hydraulic servo control technology, by control, electronics, hydraulic pressure and
The technologies such as computer are integrated in one, and take into account existing positive flow control excellent with load sensing control technique
Gesture, by DDV traditional pilot valve is replaced, and closed-loop control is carried out to valve element, is realized quickly dynamic
State is responded and accurate flow control on demand and distribution, can both have been carried out individually control or had been combined
Control, accurately controls the harmony of multiple actions and reduces the energy ezpenditure of system to greatest extent.Together
When, the different types of valve port, Jin Ershi can be replaced by change of the controller to control instruction gradient
The standardization of existing difference in functionality valve element and modularization.Additionally, the electric control multi-way valve makes engineering machinery
Remote control and automated job become possibility.
Description of the drawings
Fig. 1 is electric control multi-way valve simply connected operation principle schematic diagram of the present invention；
Fig. 2 is the hydraulic schematic diagram of electric control multi-way valve embodiment of the present invention.
In figure：1- twin-stage DDV, 2-DDV1,3- pressure sensor I, 4-DDV2,5- pressure sensings
Device II, 6- pressure sensor III, 7- displacement transducer, 8- controllers, 9- unloaders 1,10-
Straight travel valve, 11- right laterals walk DDV2,12- bucket DDV2,13- large arm DDV2,14- keep valve,
15- forearms conjunction flow control valve, 16- forearm regeneration valves, 17- forearm DDV2,18- choose to install DDV2,19-
Rotation DDV2,20- left lateral walks the main overflow valve of DDV2,21- unloader 2,22-, 23- solenoid valve blocks
Specific embodiment
The operation principle and embodiment of electric control multi-way valve of the present invention are carried out with reference to appended schematic diagram
Describe in detail, but operation principle schematic diagram and embodiment are not limited to the present invention, it is all using this
The banked direction control valves of the twin-stage DDV loop control theories of invention, all should belong to protection scope of the present invention.
The key technology of electric control multi-way valve of the present invention is to replace pilot valve using DDV and gather main valve
Core displacement, and then servo closed control is carried out to main valve plug, its operation principle is as shown in Figure 1：Fig. 1
For the operation principle schematic diagram of electric control multi-way valve of the present invention wherein, wherein 1 is twin-stage DDV,
2-DDV1,4-DDV2,5- pressure sensor II, 6- pressure sensor III, 7- displacement transducer
For its element, 3- pressure sensors I is banked direction control valves import (pump discharge) pressure sensor,
8- controllers are the control centre of whole banked direction control valves.Pi for 2-DDV1 oil passage (low pressure), T2
For the oil return line (without back pressure) of 2-DDV1, P is 1- twin-stages DDV in-lines (high-pressure oil passage), T1
For 1- twin-stage DDV oil returns, A, B oil circuit is connected with operating mechanism oil inlet and oil return.
2-DDV1 and 4-DDV2 belongs to close division center, when there is no operational order, 4-DDV2 master
Valve element is in middle position, and working hole A, B and P and T disconnect, and operating mechanism does not have action.Input behaviour
After instructing (handle action), controller is exported gives 2-DDV1 corresponding control signals, controls 4-DDV2
Main valve plug moves through its shift value control valve element arrival of feedback and operational order correspondence position, this
During the discharge capacity of controller simultaneously output signal controlling pump reach the duty valve of relevant position and correlation
Switch over, and by 3- pressure sensor I, 5- pressure sensor II and 6- pressure sensors
III acquisition systems pressure is modified in time to 4-DDV2 primary spool positions and pumpage, so as to press
Action according to command request is operated.
Embodiment
Fig. 2 is for the enforcement of excavator electric control multi-way valve hydraulic schematic diagram of the invention, basic training
The principle of positive flow can be based on, (7, respectively 2-DDV1 and 11- right laterals are walked comprising twin-stage DDV
DDV2,2-DDV1 and 12- bucket DDV2,2-DDV1 and 13- large arm DDV2,2-DDV1 and 17-
Forearm DDV2,2-DDV1 and 18- choose to install DDV2,2-DDV1 and 19- rotation DDV2,2-DDV1
DDV2 is walked with 20- left lateral, comprising LVDT and pressure sensor), unloader (2, respectively
9- unloaders 1 and 21- unloaders 2), 10- straight travel valves, 14- keep valve (2), 15-
Forearm closes flow control valve, 16- forearm regeneration valves, the main overflow valves of 22-, 23- solenoid valve blocks and (contains ratio
Magnetic valve and switch electromagnetic valve) and check valve and load overflow valve etc., wherein 13- large arm DDV2
Integrated rising interflow function and decline regeneration function, 17- forearm DDV2 are integrated to raise interflow function outward,
Forearm declines regeneration function and is controlled by 16- forearm regeneration valves, and the main overflow valves of 22- can pass through electromagnetism
Valve controls its function of increasing pressure.
Wherein, Pi, P1, P2 are exported respectively with low pressure small displacement pump, high-pressure pump 1 and high-pressure pump 2
Connection, T1 connects its corresponding execution machine of the working holes such as fuel tank, AR, BR, AC, BC with T2
Structure imports and exports connection.Other operations are not carried out after engine start, high-pressure pump 1 and 2 is in float
Amount state, and off-load is carried out by 9- unloaders 1 and 21- unloaders 2.After entering the operating instructions,
Controller sends signal and controls corresponding valve element action, while the unloader of the system is closed, performs machine
Structure action, executing agency's action speed depends entirely on operational order size.Straight travel valve is on a left side
Right lateral is walked and switched over during the action simultaneously of other executing agencies, now ensures a system (P2 system
System) only it is left and right walking fuel feeding, another system (P1 systems) gives other executing agency's fuel feeding.
Additionally, passing through straight line moving valve element, it is also possible to realize the interflow of two systems (such as the interflow of bucket
Function).When having two or more operations, handle signal input controller, controller synthesis
The signal of the corresponding valve element of output control and the signal of control pumpage and magnetic valve are distinguished afterwards, and are gathered
System pressure, using each valve port size of highest load pressure amendment, it is ensured that each action can be assisted
Transfer in row.
Claims (1)
1. a kind of electric control multi-way valve, including controller (8), several twin-stages DDV (1), electromagnetism
Valve group (23)；Characterized in that, twin-stage DDV (1) includes DDV1 (2), DDV2 (4), pressure
Force snesor II (5), pressure sensor III (6), displacement transducer (7) and unloader 1 (9),
The duty valves such as unloader 2 (21), straight travel valve (10), DDV1 (2) and DDV2 (4) is straight
Connect in succession, pressure sensor is loaded on respectively working hole A, B of DDV2 (4), displacement transducer (7)
Be connected with the valve element of DDV2 (4), several twin-stages DDV (1) respectively with unloader 1 (9), unload
During lotus valve 2 (21) and straight travel valve (10) are parallel to oil circuit, electric control handle, pressure sensor
Pass through cable input controller (8) with the output signal of displacement transducer (7), controller sends finger
Order control DDV1 (2), pump and solenoid valve block (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750157.0A CN106678111A (en) | 2015-11-06 | 2015-11-06 | Electrically-controlled multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750157.0A CN106678111A (en) | 2015-11-06 | 2015-11-06 | Electrically-controlled multi-way valve |
Publications (1)
| Publication Number | Publication Date |
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| CN106678111A true CN106678111A (en) | 2017-05-17 |
Family
ID=58858473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510750157.0A Pending CN106678111A (en) | 2015-11-06 | 2015-11-06 | Electrically-controlled multi-way valve |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191441A (en) * | 2017-07-27 | 2017-09-22 | 徐州重型机械有限公司 | Hydraulic system, the control method of hydraulic system and engineering machinery |
| CN107503995A (en) * | 2017-07-18 | 2017-12-22 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of closed-loop control steering flow distributes multichannel valve arrangement |
| CN108589823A (en) * | 2018-05-31 | 2018-09-28 | 山东临工工程机械有限公司 | Automatically controlled positive flow master control valve assembly |
| CN110173015A (en) * | 2019-05-28 | 2019-08-27 | 江苏徐工工程机械研究院有限公司 | Straight travel valve, engineering machinery hydraulic control system and engineering machinery |
| CN113669314A (en) * | 2021-08-05 | 2021-11-19 | 天津工程机械研究院有限公司 | Hydraulic system of pure electric engineering vehicle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503995A (en) * | 2017-07-18 | 2017-12-22 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of closed-loop control steering flow distributes multichannel valve arrangement |
| CN107191441A (en) * | 2017-07-27 | 2017-09-22 | 徐州重型机械有限公司 | Hydraulic system, the control method of hydraulic system and engineering machinery |
| CN108589823A (en) * | 2018-05-31 | 2018-09-28 | 山东临工工程机械有限公司 | Automatically controlled positive flow master control valve assembly |
| CN108589823B (en) * | 2018-05-31 | 2023-11-21 | 山东临工工程机械有限公司 | Main control valve assembly for electric control positive flow |
| CN110173015A (en) * | 2019-05-28 | 2019-08-27 | 江苏徐工工程机械研究院有限公司 | Straight travel valve, engineering machinery hydraulic control system and engineering machinery |
| CN110173015B (en) * | 2019-05-28 | 2021-07-30 | 江苏徐工工程机械研究院有限公司 | Linear traveling valve, engineering machinery hydraulic control system and engineering machinery |
| CN113669314A (en) * | 2021-08-05 | 2021-11-19 | 天津工程机械研究院有限公司 | Hydraulic system of pure electric engineering vehicle |
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Application publication date: 20170517 |