CN106286481A - A kind of hydraulic commutating circuit without channelling and commutation method thereof - Google Patents
A kind of hydraulic commutating circuit without channelling and commutation method thereof Download PDFInfo
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- CN106286481A CN106286481A CN201610696130.2A CN201610696130A CN106286481A CN 106286481 A CN106286481 A CN 106286481A CN 201610696130 A CN201610696130 A CN 201610696130A CN 106286481 A CN106286481 A CN 106286481A
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- Prior art keywords
- mouth
- shuttle valve
- valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/028—Shuttle valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3052—Shuttle valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
- F15B2211/31558—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having a single output member
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of hydraulic commutating circuit without channelling and commutation method thereof.Described hydraulic commutating circuit includes the solenoid directional control valve connected with hydraulic system oil inlet P, the cooler connected with fuel tank hydraulic system oil-out T, hydraulic cylinder, and the first shuttle valve and the second shuttle valve；Described first shuttle valve and the second shuttle valve are arranged between hydraulic cylinder and fuel tank hydraulic system oil-out T and between hydraulic cylinder and solenoid directional control valve, the oil-feed of described hydraulic cylinder left end is connected with the oil-out of described solenoid directional control valve by the first shuttle valve and the second shuttle valve respectively with the oil-feed of right-hand member, and the oil return of described hydraulic cylinder left end and the oil return of right-hand member flow into fuel tank hydraulic system oil-out T by direct cooled device after the first shuttle valve and the second shuttle valve respectively.The working solution that the present invention makes circulation commutate can directly lead to oil sump tank, it is to avoid commutate forward and backward working solution by way of element and pipeline there is channelling repeatedly.
Description
Technical field
The present invention relates to a kind of hydraulic commutating circuit without channelling and commutation method thereof, belong to the technology of design of Hydraulic System
Field.
Background technology
Hydraulic commutating circuit is for changing the direction of motion of executive component, and mostly this loop is to use various commutations
Valve realizes, and is generally used to control the round commutation of hydraulic cylinder, or the rotating of hydraulic motor.This loop is at hydraulic test
In of many uses, it may be said that most hydraulic tests are required for using hydraulic commutating circuit, such as: entering of lathe cutter saddle
Move back, the liter degradation of fork truck bracket.
It is described further as a example by conventional hydraulic cylinder commutation loop.
Hydraulic commutating circuit shown in Fig. 1 is made up of solenoid directional control valve 1, hydraulic cylinder 2, when the left position work of solenoid directional control valve 1
When making (DT1 energising), the oil-feed of P mouth is through the left position of reversal valve 1, and (fluid flows to see filled arrows institute in the left chamber of entrance hydraulic cylinder 2
Show), promote piston rod to move right；The fluid in the right chamber of hydraulic cylinder 2 is through the right position oil return of reversal valve 1；In order to control oil liquid temperature
In rated range, it is mounted with water cooler 3 at oil return line, for lowering the temperature to fluid.So, return to after the cooled device of oil return 3
Fuel tank T mouth (fluid flows to as shown in hollow arrow).When reversal valve 1 right position work (DT2 energising), contrary with aforementioned.This is
Conventional reversal valve is as the operation principle of the hydraulic commutating circuit of executive component.
The Disadvantages analysis of typical hydraulic commutation loop:
1, oil liquid temperature cannot be control effectively by this loop
Being not difficult to find out from the work process of above-mentioned typical hydraulic commutation loop, this loop also exists certain drawback, it may be assumed that commutation
Valve in circulation work, the A mouth of reversal valve 1 and the fluid in the left chamber of hydraulic cylinder 2, the oil in B mouth and the right chamber of hydraulic cylinder 2 of reversal valve 1
Liquid, this two parts working solution is not through the direct oil sump tank of T mouth of reversal valve 1, but in the channelling repeatedly of two chambeies, only part is oily
Liquid (difference of two cavity oil liquid volume) cooled device 3 oil sump tank.When the difference of two cavity oil liquid volume is the least, the flow of oil sump tank T mouth is more
Few.So, the cooler 3 on oil return line in fact cannot carry out effective temperature-reducing to the temperature of working solution, causes driving hydraulic pressure
The temperature of the working solution of cylinder 2 back and forth movement is difficult to effectively control, and often causes that temperature is too high, oil viscosity reduces, sealing member
Aging, then there is leakage of oil, the fault such as creep, affect the properly functioning of equipment.This is that the hydraulic commutating circuit of room temperature fluid is general
Store-through drawback.
Not only the hydraulic commutating circuit of room temperature fluid is such, when operating condition of test requires that working solution temperature is high temperature or low temperature
And when requiring that temperature is carried out continuous control, working solution channelling repeatedly that typical hydraulic commutation loop shown in Fig. 1 exists, can not
Directly the drawback of oil sump tank is the most notable.When equipment to the span of control of oil liquid temperature more hour, the drawback in this loop is the most notable,
Often lead to equipment dependability poor, it is impossible to work continuously.This often occurs in engineering practice, and situation is even worse more than room temperature
Cake.
2, contamination level of oil liquid cannot be control effectively by this loop
When equipment requirements carries out continuous control to the dustiness of working solution, or require that the fifth wheel producing hydraulic cylinder is carried out
During inspection, equally, because the hydraulic commutating circuit shown in Fig. 1 exists above-mentioned drawback, cause can not the dustiness of working solution being entered
Row continuous control, also cannot check the fifth wheel that hydraulic cylinder produces.When dustiness requires the highest, the drawback in this loop is more
Significantly.
It is reported, at present, either in theory or practice, above-mentioned hydraulic commutating circuit is existed by domestic Hydraulic Industry
The drawback of fluid channelling repeatedly, there is no in the industry the solution generally admitted.
Inventor has delivered paper " design of a kind of novel shuttle valve ", this shuttle in 2009 on " hydraulic pressure is with pneumatic " magazine
Valve efficiently solves and cleans the problem that forward and backward working solution is mutually isolated, and designs a kind of novel shuttle valve, is not required to electromagnetism or manual
Commutation, force feed mouth, oil return opening can be changed according to the difference in oil-feed direction, become the technological highlights in this Test-bed Design.
But, 7 years are in the past, and industry field still nobody considered to be applied to shuttle valve in hydraulic pressure commutation solve channelling
Problem.
Summary of the invention
It is desirable to provide a kind of hydraulic commutating circuit without channelling and commutation method thereof, this commutation loop can make to follow
Ring commutation working solution can directly lead to oil sump tank, it is to avoid commutate forward and backward working solution by way of element and pipeline there is channelling repeatedly.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of hydraulic commutating circuit without channelling, including the solenoid directional control valve connected with hydraulic system oil inlet P, with fuel tank hydraulic pressure
The cooler of system oil-out T connection, and hydraulic cylinder, it is structurally characterized in that: also include the first shuttle valve and the second shuttle valve；Described
First shuttle valve and the second shuttle valve are arranged between hydraulic cylinder and fuel tank hydraulic system oil-out T and hydraulic cylinder and electromagnetic switch
Between valve, the oil-feed of described hydraulic cylinder left end and the oil-feed of right-hand member are changed with described electromagnetism by the first shuttle valve and the second shuttle valve respectively
Connect to the oil-out of valve, after the oil return of described hydraulic cylinder left end and the oil return of right-hand member are respectively by the first shuttle valve and the second shuttle valve
Direct cooled device flows into fuel tank hydraulic system oil-out T.
Thus, traditional hydraulic commutating circuit is innovated by the commutation loop of the present invention, utilizes shuttle valve pair dexterously
The fluid of commutation loop carries out water conservancy diversion so that fluid can replaced oil sump tank, formed total system circulation.This is to hydraulic test oil
Liquid temp, pollutional equivalent amount greatly benifit, is effectively increased the functional reliability of hydraulic test, reduces equipment failure rate.
According to embodiments of the invention, it is also possible to the present invention is further optimized, below for the skill formed after optimizing
Art scheme:
According to embodiments of the invention, it is preferred to use described first shuttle valve and the second shuttle valve be respectively provided with A mouth, T mouth and P mouth；Institute
The left end of the A mouth and described hydraulic cylinder of stating the first shuttle valve connects, and the A mouth of described second shuttle valve connects with the right-hand member of described hydraulic cylinder
Logical；The P mouth of described first shuttle valve connects with the oil outlet end of solenoid directional control valve respectively with the P mouth of described second shuttle valve；Described first
The T mouth of shuttle valve and the T mouth of the second shuttle valve connect with described cooler respectively.
In order to prevent liquid from refluxing, between described first shuttle valve and cooler, it is provided with the first check valve, described second shuttle valve
And it is provided with the second check valve between cooler.
According to embodiments of the invention, the structure of described first shuttle valve and the second shuttle valve is identical, all includes valve body, is contained in valve
The left end cap at body two ends and right end cap, the spool being contained in valve body, and the valve ball being contained in spool；Open on described body wall
There is T mouth, described left end cap has P mouth, described right end cap has A mouth；Equipped with spring base on described spool, it is contained in spring base
On spring press described valve ball.The shuttle that preferably concrete structure relates in being referred to paper " design of a kind of novel shuttle valve "
Valve.
Based on same inventive concept, present invention also offers the commutation of a kind of described hydraulic commutating circuit without channelling
Method, described first shuttle valve and the second shuttle valve be respectively provided with A mouth, T mouth and P mouth, and described commutation method comprises the steps:
When the left position of solenoid directional control valve works, i.e. the DT1 energising of solenoid directional control valve, hydraulic oil sequentially passes through hydraulic system oil-feed
Mouth P, the left position of solenoid directional control valve and oil-out A thereof, the first shuttle valve enter P mouth and go out A mouth, enter the left chamber of hydraulic cylinder, promote piston
Bar moves right；Through the second shuttle valve, the fluid in the right chamber of hydraulic cylinder enters that A mouth goes out T mouth, the second check valve, cooler return to oil successively
Case hydraulic system oil-out T；
When the right position of solenoid directional control valve works, i.e. the DT2 energising of solenoid directional control valve, hydraulic oil sequentially passes through hydraulic system oil-feed
Mouth P, the right position of solenoid directional control valve and oil-out B thereof, the second shuttle valve enter P mouth and go out A mouth, enter the right chamber of hydraulic cylinder, promote piston
Bar is to left movement；The fluid in the left chamber of hydraulic cylinder enters that A mouth goes out T mouth, the first check valve, cooler return to fuel tank successively through the first shuttle valve
Hydraulic system oil-out T.
Thus, utilize this hydraulic circuit, and Oil-temperature control element, pollutional equivalent amount element adapted, can be to commutation loop
Oil temperature, dustiness control effectively, can be reduce hydraulic test fault rate, improve reliability contribute.
Preferably, when the P mouth oil-feed of the first shuttle valve or the second shuttle valve, P mouth is connected with A mouth, and T mouth is with P mouth, A mouth the most not
Connect.
Preferably, when the A mouth oil-feed of the first shuttle valve or the second shuttle valve, A mouth is connected with T mouth, and P mouth is with A mouth, T mouth the most not
Connect.
Compared with prior art, the invention has the beneficial effects as follows: the present invention, with shuttle valve for commutation diversion member, is commutating back
Two ends, road are provided with shuttle valve, make oil return all flow back to fuel tank through shuttle valve, form systemic circulation, extend oil circulation path, elongate
Cycle period, it is to avoid the channelling repeatedly between reversal valve and commutation executive component of the fluid in reversing pipeline, for oil liquid temperature
And pollutional equivalent amount creates condition, hydraulic commutating circuit is made generally to implement.
Commutation loop of the present invention is particularly suited for the use needing the oil liquid temperature to commutation loop, dustiness to be controlled
Environment.
The present invention is of many uses, may be used for the industrial fields such as machinery, metallurgy, aviation, wind-powered electricity generation, mining industry, is hydraulic test
Indispensable ingredient.
Accompanying drawing explanation
Fig. 1 is typical hydraulic commutating circuit schematic diagram；
Fig. 2 is the hydraulic commutating circuit schematic diagram (operating mode 1, spool is in left position) that the present invention is novel；
Fig. 3 is the hydraulic commutating circuit schematic diagram (operating mode 2, spool is in right position) that the present invention is novel；
Fig. 4 is shuttle valve operational diagram in the present invention (operating mode 1, spool is in right position)；
Fig. 5 is shuttle valve operational diagram in the present invention (operating mode 2, spool is in left position).
In the drawings
1. solenoid directional control valve；2. hydraulic cylinder；3. cooler；4. the first shuttle valve；5. the second shuttle valve；6. the first check valve；7. second
Check valve；11. left end caps；12. valve bodies；13. steel balls；14. springs；15. spools；16. spring bases；17. circlips；18. is close
Sealing；19. right end caps.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the present invention and the feature in embodiment can be mutually combined.
A kind of hydraulic commutating circuit without channelling, this commutation loop does not change the original function of commutation loop, with Novel shuttle
Valve carries out creative cooperation, is combined arranging to it, makes hydraulic commutating circuit realize loop and individually lead to the effect of fuel tank.This reality
Execute the shuttle valve that example preferably employs " hydraulic pressure is with pneumatic " 2009 fourth phases disclosed " the structure design of a kind of novel shuttle valve " and relates to.
The principle of this hydraulic commutating circuit is as shown in Fig. 2, Fig. 3, by reversal valve 1, hydraulic cylinder the 2, first shuttle valve the 4, second shuttle
Valve the 5, first check valve the 6, second check valve 7 forms.
Two kinds of operating modes shown in Fig. 2 Fig. 3, by the water conservancy diversion of first shuttle valve the 4, second shuttle valve 5 so that oil return without reversal valve 1,
But individually take back fuel tank, thus avoid the drawback of reversal valve A, B mouth and the fluid channelling repeatedly in hydraulic cylinder two chamber, formed
The working solution circulation from hydraulic cylinder to fuel tank.The effect of first check valve the 6, second check valve 7 is to avoid oil return reverse flow
Enter shuttle valve, thus avoid the oil return interference to shuttle valve function.
Hydraulic circuit shown in Fig. 2 Fig. 3, maintains reversal valve 1 Median Function equally and does not changes.
The feature of this hydraulic commutating circuit is the use of the diversion function of shuttle valve.That is: when the P mouth oil-feed of shuttle valve, P mouth leads to
A mouth, remaining hydraulic fluid port is obstructed；When A mouth oil-feed, A mouth leads to T mouth, and remaining hydraulic fluid port is obstructed.Owing to the commutation of the hydraulic fluid port of two pieces shuttle valve is made
With, it is ensured that entering between reversal valve 1 to two pieces shuttle valve, oil return pipe functional independence, will not enter, oil return pipe share and causes altering
Stream situation occurs.Therefore, the diversion function of this shuttle valve is the key point of this hydraulic commutating circuit.
In hydraulic commutating circuit of the present invention, all have followed and make oil return lead directly to fuel tank, avoid the former of channelling repeatedly
Then.Principle features for this loop of sake of clarity, it is necessary to work process and key element brief introduction to loop are as follows:
The method utilizing the above-mentioned hydraulic commutating circuit without channelling to carry out commutating is as follows:
Fig. 2 is operating mode 1, and when the left position of solenoid directional control valve 1 works (DT1 energising), the oil-feed of P mouth is through the left position of reversal valve 1, A
Mouthful fuel-displaced, then enter P mouth through the first shuttle valve 4 and go out A mouth, enter the left chamber (oil-feed flows to as shown in filled arrows) of hydraulic cylinder 2, promote
Piston rod moves right；The fluid in the right chamber of hydraulic cylinder 2 enters A mouth through the second shuttle valve 5 and returns T mouth, then through the second check valve 7, cooler 3
Return to fuel tank T mouth (oil return flows to as shown in hollow arrow).
Fig. 3 is the operating mode after commutation.When the right position of solenoid directional control valve 1 works (DT2 energising), the oil-feed of P mouth is through commutation
The right position of valve 1, B mouth are fuel-displaced, then enter P mouth through the second shuttle valve 5 and go out A mouth, and (oil-feed flows to see solid arrow to enter the right chamber of hydraulic cylinder 2
Shown in head), promote piston rod to left movement；The fluid in the left chamber of hydraulic cylinder 2 enters A mouth through the first shuttle valve 4 and returns T mouth, more single through first
Fuel tank T mouth (oil return flows to as shown in hollow arrow) is returned to valve 6, cooler 3.
In shuttle valve structure shown in Fig. 4, when P mouth oil-feed, spool 15 is pushed into right-hand member by hydraulic coupling, the list being contained in spool
Being opened by forward to the steel ball 13 of valve, fluid is connected with A mouth from P mouth, and now T mouth is blocked by spool 15, does not connects with P, A mouth
Logical.
In shuttle valve structure shown in Fig. 5, when A mouth oil-feed, spool 15 is pushed into left end by hydraulic coupling, the list being contained in spool
Reversely being closed by fluid to the steel ball 13 of valve, fluid is connected with T mouth from A mouth, and now P mouth is blocked by spool 15, with A, T mouth the most not
Connect.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not
For limiting the scope of the present invention, after having read the present invention, the those skilled in the art's various equivalent form of values to the present invention
Amendment each fall within the application claims limited range.
Claims (7)
1. without a hydraulic commutating circuit for channelling, including the solenoid directional control valve (1) connected with hydraulic system oil inlet P, with liquid
The cooler (3) of pressure system oil-out T connection, and hydraulic cylinder (2), it is characterised in that: also include the first shuttle valve (4) and second
Shuttle valve (5)；Described first shuttle valve (4) and the second shuttle valve (5) be arranged between hydraulic cylinder (2) and hydraulic system oil-out T with
And between hydraulic cylinder (2) and solenoid directional control valve (1), the oil-feed of described hydraulic cylinder (2) left end and the oil-feed of right-hand member are respectively by the
One shuttle valve (4) connects with the oil-out of the second shuttle valve (5) with described solenoid directional control valve (1), the oil return of described hydraulic cylinder (2) left end
It is fuel-displaced that oil return with right-hand member flows into hydraulic system by the first shuttle valve (4) and the most direct cooled device of the second shuttle valve (5) (3) respectively
Mouth T.
Hydraulic commutating circuit without channelling the most according to claim 1, it is characterised in that described first shuttle valve (4) and
Two shuttle valves (5) are respectively provided with A mouth, T mouth and P mouth；The A mouth of described first shuttle valve (4) connects with the left end of described hydraulic cylinder (2), institute
The right-hand member of the A mouth and described hydraulic cylinder (2) of stating the second shuttle valve (5) connects；The P mouth of described first shuttle valve (4) and described second shuttle
The P mouth of valve (5) oil outlet end with solenoid directional control valve (1) respectively connects；The T mouth of described first shuttle valve (4) and the second shuttle valve (5)
T mouth connects with described cooler (3) respectively.
Hydraulic commutating circuit without channelling the most according to claim 1 and 2, it is characterised in that described first shuttle valve (4) with
It is provided with the first check valve (6) between cooler (3), between described second shuttle valve (5) and cooler (3), is provided with the second check valve
(7).
Hydraulic commutating circuit without channelling the most according to claim 2, it is characterised in that described first shuttle valve (4) and
The structure of two shuttle valves (5) is identical, all includes valve body (12), is contained in left end cap (11) and the right end cap (19) at valve body (12) two ends,
The spool (15) being contained in valve body (12), and the valve ball (13) being contained in spool (15)；T is had on described valve body (12) sidewall
Mouthful, described left end cap (11) has P mouth, described right end cap has A mouth on (19)；Equipped with spring base on described spool (15)
(16) spring (14), being contained on spring base (16) presses described valve ball (13).
5. the commutation method of the hydraulic commutating circuit without channelling as described in one of claim 1-4, it is characterised in that institute
Stating the first shuttle valve (4) and the second shuttle valve (5) is respectively provided with A mouth, T mouth and P mouth, described commutation method comprises the steps:
When the left position of solenoid directional control valve (1) works, i.e. the DT1 energising of solenoid directional control valve (1), hydraulic oil sequentially passes through hydraulic pressure system
System oil inlet P, the left position of solenoid directional control valve (1) and oil-out A thereof, the first shuttle valve (4) enter P mouth and go out A mouth, enter hydraulic cylinder (2)
Left chamber, promote piston rod move right；The fluid in hydraulic cylinder (2) right chamber successively through the second shuttle valve (5) enter A mouth go out T mouth,
Two check valves (7), cooler (3) return to fuel tank hydraulic system oil-out T；
When the right position of solenoid directional control valve (1) works, i.e. the DT2 energising of solenoid directional control valve (1), hydraulic oil sequentially passes through hydraulic pressure system
System oil inlet P, the right position of solenoid directional control valve (1) and oil-out B thereof, the second shuttle valve (5) enter P mouth and go out A mouth, enter hydraulic cylinder (2)
Right chamber, promote piston rod to left movement；The fluid in hydraulic cylinder (2) left chamber successively through the first shuttle valve (4) enter A mouth go out T mouth, first
Check valve (6), cooler (3) return to fuel tank hydraulic system oil-out T.
The commutation method of the hydraulic commutating circuit without channelling the most according to claim 5, it is characterised in that when the first shuttle valve
(4), during the P mouth oil-feed of or the second shuttle valve (5), P mouth is connected with A mouth, and T mouth is all disconnected with P mouth, A mouth.
The commutation method of the hydraulic commutating circuit without channelling the most according to claim 5, it is characterised in that when the first shuttle valve
(4), during the A mouth oil-feed of or the second shuttle valve (5), A mouth is connected with T mouth, and P mouth is all disconnected with A mouth, T mouth.
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| CN101498328A (en) * | 2009-03-13 | 2009-08-05 | 南京高精船用设备有限公司 | Ship hydraulic station for realizing automatic cycle cooling |
| CN103343759A (en) * | 2012-09-18 | 2013-10-09 | 赵江 | Dual-purpose multi-channel hydraulic proportional valve |
| CN202971363U (en) * | 2012-11-30 | 2013-06-05 | 中煤科工集团重庆研究院 | Full-hydraulic underground drill rig hydraulic control system for mine |
| CN203500152U (en) * | 2013-09-27 | 2014-03-26 | 江苏中机矿山设备有限公司 | Hydraulic height adjusting system of coal mining machine |
| CN203627044U (en) * | 2013-12-25 | 2014-06-04 | 中国重汽集团济南动力有限公司 | Multifunctional double-oil-tank independent oil supply system |
| CN104030163A (en) * | 2014-05-23 | 2014-09-10 | 武汉武桥交通装备技术有限公司 | Low-energy consumption and low-heat constant pressure system of full-hydraulic crane for ship |
| CN203920888U (en) * | 2014-06-25 | 2014-11-05 | 徐工集团工程机械股份有限公司 | A kind of construction machinery and equipment skid steer system |
| CN104163385A (en) * | 2014-07-24 | 2014-11-26 | 武汉船用机械有限责任公司 | Hydraulic control system for winch |
| CN204942155U (en) * | 2015-06-15 | 2016-01-06 | 徐州重型机械有限公司 | A kind of mechanical handling formula multiple directional control valve reliability test bench |
| CN105114165A (en) * | 2015-07-27 | 2015-12-02 | 广西柳工机械股份有限公司 | Heat dissipating system of mining dump vehicle |
| CN105485516A (en) * | 2015-12-28 | 2016-04-13 | 重庆耐德节能装备有限公司 | Inner-cooled hydraulic supercharger for natural gas fueling substation |
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