CN109695265A - Hydraulic system and engineering truck - Google Patents
Hydraulic system and engineering truck Download PDFInfo
- Publication number
- CN109695265A CN109695265A CN201910130850.6A CN201910130850A CN109695265A CN 109695265 A CN109695265 A CN 109695265A CN 201910130850 A CN201910130850 A CN 201910130850A CN 109695265 A CN109695265 A CN 109695265A
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- hydraulic fluid
- control valve
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- 239000012530 fluid Substances 0.000 claims abstract description 201
- 238000000034 method Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 210000003746 feather Anatomy 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000008676 import Effects 0.000 description 9
- 238000010992 reflux Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
Abstract
The present invention relates to a kind of hydraulic system and engineering trucks, hydraulic system includes: hydraulic actuator, including the first hydraulic fluid port and the second hydraulic fluid port, a hydraulic fluid moved for introducing driving hydraulic actuator in first hydraulic fluid port and the second hydraulic fluid port, another is for being discharged hydraulic fluid；Hydraulic pump, for providing hydraulic fluid for hydraulic actuator；Control valve, including the first runner being connected to hydraulic pump, the second flow channel being connected to hydraulic pump, the third flow channel for being connected to hydraulic fluid reservoir, the 4th runner for being connected to hydraulic fluid reservoir, the first working hole being connected to the first hydraulic fluid port of hydraulic actuator and the second working hole being connected to the second hydraulic fluid port of hydraulic actuator, wherein, first working hole may be selected to be connected to one in first runner and third flow channel, and the second working hole may be selected to be connected to one in second flow channel and the 4th runner.Advantageously reduce the energy consumption of hydraulic system.
Description
Technical field
The present invention relates to engineering machinery fields, in particular to a kind of hydraulic system and engineering truck.
Background technique
Hydraulic crawler excavator has powerful multi-functional adaptability as a kind of most typical engineering machinery, no matter
The civilian industries such as communications and transportation, building, mining mineral resource field, or it is military in large-scale hydraulic and electric engineering engineering, earthquake relief work
Equal special dimensions have all played irreplaceable role.Especially domestic in recent years a large amount of infrastructure projects are put into operation, are made
The demand of hydraulic crawler excavator is constantly soaring.
Fig. 1 shows a kind of hydraulic system of the excavator of prior art, as shown in Figure 1, hydraulic system includes for driving
Move the hydraulic motor 5 of the pivoting part of carrying digging arm, for leading to the hydraulic pump 2 of hydraulic fluid for hydraulic motor and for controlling
The reversal valve 3 of hydraulic motor 5, reversal valve 3 include import P is connected to hydraulic pump, the refluxing opening T that is connected to fuel tank 1, with hydraulic horse
Up to 5 the first working hole A for being connected to of the first hydraulic fluid port and the second work for being connected to the second hydraulic fluid port of hydraulic motor 5
Make mouth B.
Hydraulic system further includes brake 6 for preventing hydraulic motor rotation and acts for control brake
Control valve 7.
Hydraulic system further includes shuttle valve 4, shuttle valve 4 include the first import being connected to the first working hole A of reversal valve 3, with
Second import of the second working hole B connection of reversal valve 3 and the outlet being connected to brake 6.The outlet of shuttle valve 4 is for braking
Device 6 conveys the hydraulic fluid for making it release the braking to hydraulic motor 5.Valve 7 is located on the pipeline between brake 6 and shuttle valve 4.
Reversal valve 3 has the first working condition, the second working condition and third working condition, in first state, reversal valve 3
The first working hole A be connected with import P, the second working hole B of reversal valve 3 is connected with refluxing opening T.In the second state, reversal valve 3
The second working hole B be connected with import P, the first working hole A of reversal valve 3 is connected with refluxing opening T.In the second state, reversal valve 3
The first working hole A be not turned on import P and refluxing opening T, the second working hole B and import P and refluxing opening T of reversal valve 3
It is not turned on.
The movement when direction of motion of hydraulic motor 5 and reversal valve 3 are in the second state when reversal valve 3 is in first state
Contrary, reversal valve 3 is in the third state, and hydraulic motor 5 stops operating.When reversal valve 3 is in the third state, hydraulic motor
The hydraulic fluid of 5 discharge is ended by reversal valve 3, hydraulic motor stop operating during since the effect of inertia force is to other
Component causes biggish impact, this can not only cause other components to damage the waste that will also result in energy.
In addition, the more narrow complexity of flow path in reversal valve in hydraulic system, therefore reversal valve 3 is to 5 row of hydraulic motor
The resistance of hydraulic fluid out is larger, therefore the back pressure of hydraulic motor 5 is larger, this also make accordingly hydraulic motor 5 need compared with
Big driving force is unfavorable for saving energy.
As global industryization rapidly develops, energy shortage and environmental problem are on the rise, and the whole society is to energy-saving and emission-reduction
It is required that being also increasingly stringenter.Conventional hydraulic excavator ownership is big, fuel utilization ratio is low, exhaust emission is serious, to energy demand
Stern challenge is constituted with environmental protection, energy-saving and emission-reduction have become future developing trend.
Summary of the invention
The present invention is intended to provide a kind of hydraulic system and engineering truck, are unfavorable for solving to improve hydraulic system in the prior art
Certainly the problem of the energy.
According to an aspect of an embodiment of the present invention, the present invention provides a kind of hydraulic system, hydraulic system includes:
Hydraulic actuator, including the first hydraulic fluid port and the second hydraulic fluid port, the first hydraulic fluid port and second
A hydraulic fluid moved for introducing driving hydraulic actuator in hydraulic fluid port, another is for being discharged flow of pressurized
Body；
Hydraulic pump, for providing hydraulic fluid for hydraulic actuator；
Control valve, including the first runner being connected to the hydraulic pump, second flow channel being connected to hydraulic pump, hydraulic for being connected to
The third flow channel of fluid tank, the 4th runner for being connected to hydraulic fluid reservoir, the first hydraulic fluid port with hydraulic actuator
First working hole of connection and the second working hole being connected to the second hydraulic fluid port of hydraulic actuator,
Wherein, the first working hole may be selected to be connected to one in first runner and third flow channel, and the second working hole is optional
It selects and is connected to one in second flow channel and the 4th runner.
Optionally, control valve further include the first valve being located in first runner, be located at the second valve of second flow channel, be located at
Third valve in third flow channel and the 4th valve being located in the 4th runner.
Optionally,
First valve is flow control valve；And/or
Second valve is flow control valve；And/or
Third valve is flow control valve；And/or
4th valve is flow control valve.
Optionally, control valve includes:
First control valve, for first runner, third flow channel and the first working hole to be arranged on it；And
First control valve, and the first control valve split settings, and for second flow channel, the 4th runner and the to be arranged on it
Two working holes.
Optionally, hydraulic system further includes the accumulator that can be connected to hydraulic actuator, and accumulator hydraulic for holding
Units absorb the hydraulic fluid of hydraulic actuator discharge and/or for starting in hydraulic actuator during braking
Hydraulic fluid is provided to hydraulic actuator in the process.
Optionally,
Accumulator may be selected to be connected to one in the first working hole and the second working hole of control valve, to introduce hydraulic pump
The hydraulic fluid of offer,
A company in the first hydraulic fluid port and the second hydraulic fluid port with hydraulic actuator may be selected in accumulator
It is logical, to provide hydraulic fluid to hydraulic actuator during hydraulic actuator starts.
Optionally, hydraulic system further includes reversal valve, and reversal valve includes first be connected to the first working hole of control valve
Fluid flow port, the second fluid mouth being connected to the second working hole of control valve and the third fluid flow port being connected to accumulator, reversal valve
Second shape of the first state and second fluid mouth and the conducting of third fluid flow port that are connected with first fluid mouth and third fluid flow port
State.
Optionally, reversal valve includes:
First control fluid flow port, connects with the first working hole of control valve and the first hydraulic fluid port of hydraulic actuator
It is logical, for introducing the hydraulic fluid for making reversal valve switch to first state；
Second control fluid flow port, connects with the second working hole of control valve and the second hydraulic fluid port of hydraulic actuator
It is logical, for introducing the hydraulic fluid for making reversal valve switch to the second state.
Optionally, hydraulic system further include:
First pipeline, including the first end that is connected to the first fluid mouth of the first working hole of control valve and reversal valve and
With the second end of the second hydraulic fluid port of hydraulic actuator；And
Second pipeline, including the first end that is connected to the second fluid mouth of the second working hole of control valve and reversal valve and
With the second end of the second hydraulic fluid port of hydraulic actuator.
Optionally, hydraulic system further include:
The first branch, for conveying the hydraulic fluid of the third fluid flow port output of reversal valve to accumulator；
Second branch, for by the hydraulic fluid in accumulator to hydraulic actuator convey, and
Valve, for controlling one in the first branch and second branch conducting.
Optionally, valve includes the 5th valve being located in the first branch and the 6th valve being located in second branch.
Optionally, hydraulic system further includes controller, for controlling first during hydraulic actuator is in braking
Branch conducting, or for control second branch conducting during hydraulic actuator braking.
Optionally, hydraulic system further include:
First overflow valve is connected to the third fluid flow port of reversal valve；
Controller is electrically connected with the first overflow valve, for closing first when accumulator absorbs and/or hydraulic fluid is discharged
Overflow valve.
Optionally, hydraulic system further includes for the pressure in accumulator to be limited to predetermined value the second overflow below
Valve.
Optionally, hydraulic system further includes the unloading flow path of the hydraulic fluid for being discharged in accumulator, is unloaded in flow path
It is provided with feather valve.
Optionally, hydraulic actuator includes one in hydraulic motor and hydraulic cylinder.
According to another aspect of the present invention, a kind of engineering truck is additionally provided, engineering truck includes above-mentioned hydraulic system.
Optionally, engineering truck includes:
Vehicle frame,
Pivoting part is mounted on vehicle frame, and can rotate relative to vehicle frame by center of rotation of vertical pivot center；
Work department is mounted on pivoting part.
Optionally, work department includes the one of the working arm connecting with pivoting part and the separate rotating part for being connected to working arm
The Excavating bucket at end.
Using the technical solution of the application, control valve has the only of the hydraulic fluid for conveying hydraulic actuator discharge
The runner of vertical runner, control valve is small to the resistance of hydraulic fluid, and correspondingly the resistance of motion of hydraulic actuator is smaller, hydraulic
The back pressure of the hydraulic fluid of executive component output is smaller, advantageously reduces the energy consumption of hydraulic system.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 shows the schematic illustration of the hydraulic system of the prior art；
Fig. 2 shows the schematic diagrames of a part of the hydraulic system of the embodiment of the present invention；And
Fig. 3 shows the explosive view of another part of the hydraulic system of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 2 shows the structural schematic diagram of a part of the hydraulic system of the present embodiment, Fig. 3 shows the liquid of the present embodiment
The structural schematic diagram of another part of pressure system.
In conjunction with shown in Fig. 2 and Fig. 3, the hydraulic system of the present embodiment includes hydraulic actuator 24, for being hydraulic execution
Element 24 provides the hydraulic pump of hydraulic fluid and the control valve 1 for controlling hydraulic actuator 24.Hydraulic actuator 24 wraps
Include one of hydraulic motor and hydraulic cylinder.
Hydraulic actuator 24 includes the first hydraulic fluid port and the second hydraulic fluid port, the first hydraulic fluid port and second
A hydraulic fluid moved for introducing driving hydraulic actuator 24 in hydraulic fluid port, another hydraulic for holding
Hydraulic fluid is discharged during moving in units 24.
Wherein, when hydraulic actuator 24 is moved along first direction, the first hydraulic fluid port of hydraulic actuator 24 draws
Flow of pressurized is discharged in second hydraulic fluid port of the hydraulic fluid for entering to drive hydraulic actuator 24 to move, hydraulic actuator 24
Body.
When hydraulic actuator 24 is moved along the second direction opposite with first direction, the second liquid of hydraulic actuator 24
Fluid flow port is pressed to introduce the hydraulic fluid that driving hydraulic actuator 24 moves, the first hydraulic fluid port row of hydraulic actuator 24
Hydraulic fluid out.
Control valve 1 includes the first runner R1 being connected to hydraulic pump, the second flow channel L1 being connected to hydraulic pump, for being connected to
The third flow channel R2 of hydraulic fluid reservoir 8, the 4th runner L2 for being connected to hydraulic fluid reservoir 8, the with hydraulic actuator 24
First working hole of one hydraulic fluid port connection and the second work being connected to the second hydraulic fluid port of hydraulic actuator 24
Mouthful.
Wherein, the first working hole may be selected to be connected to one in first runner R1 and third flow channel R2, the second working hole
It may be selected to be connected to one in second flow channel L1 and the 4th runner L2.
The third flow channel R2 and the 4th runner L2 of the control valve 1 of the present embodiment are used for the liquid that hydraulic actuator 24 is discharged
Press fluid conveying to hydraulic fluid reservoir 8, it can be seen that, control valve 1 has for conveying hydraulic actuator 24 in the present embodiment
The runner of the independent runner of the hydraulic fluid of discharge, the hydraulic fluid of control valve 1 is small to the resistance of hydraulic fluid, correspondingly liquid
Press the resistance of motion of executive component 24 smaller, the back pressure for the hydraulic fluid that hydraulic actuator 24 exports is smaller, advantageously reduces
The energy consumption of hydraulic system.
Control valve 1 further include the first valve 2 being located in first runner R1, be located at the second valve 4 of second flow channel L1, be located at
Third valve 3 in third flow channel R2 and the 4th valve 5 being located in the 4th runner L2.
When hydraulic actuator being needed to move along first direction, the first valve 2 and the 4th valve 5 are opened, the second valve 3 and third valve
4 close, and the hydraulic fluid of hydraulic pump output is delivered to liquid through first runner R1, the first working hole of control valve 1 and the first pipeline 6
The first hydraulic fluid port of executive component 24 is pressed, to drive hydraulic actuator 24 to move along first direction.Member is executed hydraulic
During part 24 is moved along first direction, the hydraulic fluid of the second hydraulic fluid port discharge is through the second pipeline 7, control valve 1
Second working hole and the 4th runner L2 hydraulic return fluid tank 8.
When hydraulic actuator being needed to move in a second direction, the first valve 2 and the 4th valve 5 are closed, the second valve 3 and third valve
4 open, and the hydraulic fluid of hydraulic pump output is delivered to through second flow channel L1, the second working hole and the second pipeline 7 hydraulic executes member
Second hydraulic fluid port of part 24, to drive hydraulic actuator to move in a second direction.In hydraulic actuator 24 along second
During direction moves, first working hole of the hydraulic fluid through the first pipeline 6, control valve 1 of the first hydraulic fluid port discharge
With third flow channel R2 hydraulic return fluid tank 8.
In the present embodiment, the first valve 2 and the second valve 4 are flow control valve, and control valve 1 can be individually controlled to hydraulic
The pressure for the hydraulic fluid that executive component 24 conveys.
In the present embodiment, third valve 3 and the 4th valve 5 are flow control valve, and control valve 1 can individually adjust hydraulic hold
The back pressure for the hydraulic fluid that units 24 are discharged.
Control valve 1 includes the first control valve 1a and the second control valve 1b with the first control valve 1a split settings.Wherein,
One runner R1, third flow channel R2 and the first working hole are arranged on the first control valve 1a, second flow channel L1, the 4th runner L2 and the
Two working holes are arranged on the second control valve 1b.
Hydraulic system further includes the accumulator 18 that can be connected to hydraulic actuator 24, and accumulator 18 is used in hydraulic execution
Element 24 absorbs the hydraulic fluid that hydraulic actuator 24 is discharged and/or for opening in hydraulic actuator 24 during braking
Hydraulic fluid is provided to hydraulic actuator 24 in dynamic process.
Conventionally, as hydraulic actuator 24 directly cuts off the flow path to hydraulic delivering hydraulic fluid when braking
With the flow path that hydraulic fluid is discharged for output hydraulic pressure executive component 24, therefore the impact of hydraulic actuator 24 is larger.
In the prior art, the movement velocity in 24 start-up course of hydraulic actuator is smaller, and hydraulic actuator 24 is transported
The flow for moving required hydraulic fluid is smaller, and a part in hydraulic fluid that hydraulic pump provides is overflowed back hydraulic fluid reservoir 8,
Therefore energy waste is also resulted in, is unfavorable for reducing energy consumption.
In the present embodiment, during hydraulic actuator 24 is braked, accumulator 18 absorbs 24 row of hydraulic actuator
Hydraulic fluid out puts aside energy while slowing down the impact in 24 braking process of hydraulic actuator.
During hydraulic actuator 24 starts, accumulator 18 is to the hydraulic execution of 24 feed drive of hydraulic actuator
The hydraulic fluid that element 24 moves is reduced so that hydraulic actuator reaches predetermined running speed as early as possible because exporting hydraulic pump
Section hydraulic fluid overflow back hydraulic fluid reservoir 8 and caused by waste.
Hydraulic system further includes reversal valve 10, reversal valve 10 include be connected to the first working hole of control valve 1 it is first-class
Body mouth, the second fluid mouth being connected to the second working hole of control valve 1 and the third fluid flow port being connected to accumulator 18, reversal valve
The second of 10 first states and second fluid mouth and the conducting of third fluid flow port with first fluid mouth and the conducting of third fluid flow port
State.
Reversal valve 10 includes the first control fluid flow port and the second control fluid flow port.First control fluid flow port and control valve 1
First working hole is connected to the first hydraulic fluid port of hydraulic actuator 24, so that reversal valve 10 is switched to first for introducing
The hydraulic fluid of state；
Second control fluid flow port and the second working hole of control valve 1 and the second hydraulic fluid port of hydraulic actuator 24 are equal
Connection, for introducing the hydraulic fluid for making reversal valve 10 switch to the second state.
Hydraulic system further includes the first pipeline 6 and the second pipeline 7.First pipeline 6 includes the first working hole with control valve 1
The first end being connected to the first fluid mouth of reversal valve 10 and second with the second hydraulic fluid port of hydraulic actuator 24
End.
Second pipeline 7 includes first be connected to the second fluid mouth of the second working hole of control valve 1 and reversal valve 10
End and the second end with the second hydraulic fluid port of hydraulic actuator 24.
Hydraulic system further includes that the first branch, second branch and one for controlling in the first branch and second branch lead
Logical valve.The first branch is used to convey the hydraulic fluid that the third fluid flow port of reversal valve 10 exports to accumulator 18.
It is provided with the first check valve 12 in the first branch, is provided with second one-way valve 15 in second branch.
Second branch is in parallel with the first branch, and second branch is used to the hydraulic fluid in accumulator 18 executing member to hydraulic
Part 24 conveys.
Valve includes the 6th valve 14 that the 5th be located in the first branch valve 11 He be located in second branch.
5th valve 11 and the 6th valve 14 are solenoid valve, and hydraulic system further includes being electrically connected with the 5th valve 11 and the 6th valve 14
The controller 13 connect.Controller 13 controls the first branch and second by the switch state of the 5th valve 11 of control and the 6th valve 14
The on off operating mode on road.
Controller 13 is used to control the first branch conducting during hydraulic actuator is in braking, or for hydraulic
Executive component 24 controls second branch conducting during starting.
When braking to the hydraulic actuator 24 moved along first direction, it is hydraulic to first to cut off to close the first valve 2
The flow path of first hydraulic fluid port delivering hydraulic fluid of executive component 24, hydraulic actuator 24 continue due to inertia along first
The hydraulic fluid of direction movement, the second hydraulic fluid port discharge of hydraulic actuator 24 acts on the second control of reversal valve 10
Fluid flow port, so that reversal valve 10 switches to the second state.Controller 13 controls the 5th valve 11 and opens, and the of hydraulic actuator 24
The hydraulic fluid of two hydraulic fluid ports discharge is through the second pipeline 7, the second fluid mouth of reversal valve 10, third fluid flow port and first
Road direction accumulator 18 conveys.Accumulator 18 can also slow down liquid while storing the hydraulic fluid that hydraulic actuator 24 is discharged
Press the impact of executive component braking process.
When braking to the hydraulic actuator 24 moved in a second direction, the second valve 4 is closed, it is hydraulic to first to cut off
The flow path of second hydraulic fluid port delivering hydraulic fluid of executive component 24, hydraulic actuator 24 continue due to inertia along second
The hydraulic fluid of direction movement, the first hydraulic fluid port discharge of hydraulic actuator 24 acts on the first control of reversal valve 10
Fluid flow port, so that reversal valve 10 switches to first state.Controller 13 controls the 5th valve 11 and opens, and the of hydraulic actuator 24
The hydraulic fluid of one hydraulic fluid port discharge is through the first pipeline 6, the first fluid mouth of reversal valve 10, third fluid flow port and first
Road direction accumulator 18 conveys.Accumulator 18 can also slow down liquid while storing the hydraulic fluid that hydraulic actuator 24 is discharged
Press the impact of executive component braking process.
When starting hydraulic actuator 24 is moved along first direction, the first valve 2 and the 4th valve 5 are opened, hydraulic pump provides
First runner R1 and first working hole of the hydraulic fluid through control valve 1 act on reversal valve 10 first control fluid flow port, with
Reversal valve is set to switch to first state, controller 13 controls the 6th valve 14 in second branch and opens, hydraulic in accumulator 18
Fluid is through second branch, the third fluid flow port of reversal valve 10, second fluid mouth and the first pipeline 6 to the of hydraulic actuator 24
The conveying of one hydraulic fluid port.The hydraulic fluid that hydraulic pump provides through through control valve 1 first runner R1 and the first pipeline 6 to hydraulic
First hydraulic fluid of executive component 24 conveys.
The process that moves in a second direction of starting hydraulic actuator 24 with when start hydraulic actuator 24 along first party
Process to movement is similar, and details are not described herein.
It can be seen that in the start-up course of hydraulic actuator 24, accumulator 18 can auxiliary hydraulic pump driving it is hydraulic
Executive component 24 advantageously reduces energy consumption so that hydraulic actuator 24 can be started quickly.
Hydraulic system further includes the first overflow valve 9, and the import of the first overflow valve 9 is connected to the input end of the first branch.The
The import of one overflow valve 9 is connected to the outlet end of second branch.
Optionally, the first overflow valve 9 is solenoid valve, and controller 13 is electrically connected with the first overflow valve 9, to control the first overflow
The oil pressure relief of valve 9.
Controller 13 is electrically connected with first overflow valve 9, and hydraulic fluid is absorbed and/or be discharged in the accumulator 18
When close first overflow valve 9.
Hydraulic system further includes the second overflow valve 16 being connected to accumulator 18, and the second overflow valve 16 is used for accumulator 18
Interior pressure is limited to predetermined value or less.Hydraulic system further includes the pressure for detecting the pressure of the hydraulic fluid in accumulator 18
Power detection part 17.
Hydraulic system further includes the unloading flow path of the hydraulic fluid for being discharged in accumulator 18, unloads and is provided in flow path
Feather valve 19.
Hydraulic system further includes brake 25, the first trimmer valve 20, second for preventing hydraulic actuator 24 from moving
Trimmer valve 21, the first Fill valve 22 and the second Fill valve 23.
The present embodiment hydraulic system has following technical effect that
(1) hydraulic system is moved to the flow path and output hydraulic pressure executive component 24 of 24 delivering hydraulic fluid of hydraulic actuator
The independent control opening and closing of flow path or the flow of hydraulic fluid are discharged in the process；
(2) resistance and back pressure for the hydraulic fluid that adjustable hydraulic actuator 24 is discharged during the motion, thus
Reduce system pressure loss；
(3) the more traditional pilot-controlled multi-way reversing valve of the energy recycle device of Independent fluxes control valve and accumulator and accumulator
Energy recycle device is easily installed, interface flexible, it is easier to be realized on board a dredger；
(4) biggish compression shock can be generated in 24 braking process of hydraulic actuator, the kinetic energy of motor is made to be converted to heat
Lose, the energy regenerating in braking process got up using accumulator, can reduce system radiating, improve system reliability and
Part life；
(5) in hydraulic actuator start-up course, since the rotary inertia of excavator turntable and executing agency is big, inertia resistance
Moment is big, and rotation of rotary table is caused to accelerate slowly, and turntable starting speed can be improved using the energy that accumulator discharges.
According to another aspect of the present invention, a kind of engineering truck is additionally provided, which includes above-mentioned hydraulic pressure system
System.
Engineering truck further includes vehicle frame, the pivoting part being mounted on vehicle frame and the work department being mounted on pivoting part.
Optionally, engineering truck is excavator, and the work department of the engineering truck includes working arm and is mounted on working arm
The Excavating bucket of one end far from pivoting part.
Optionally, engineering truck is crane, and the work department of the engineering truck includes telescopic arm and is connected to telescopic arm
The suspension hook of one end.
The foregoing is merely exemplary embodiment of the present invention, are not intended to limit the invention, all in spirit of the invention
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (19)
1. a kind of hydraulic system characterized by comprising
Hydraulic actuator (24), including the first hydraulic fluid port and the second hydraulic fluid port, first hydraulic fluid port and
A hydraulic fluid moved for introducing the driving hydraulic actuator (24) in second hydraulic fluid port, another use
In discharge hydraulic fluid；
Hydraulic pump, for providing hydraulic fluid for the hydraulic actuator (24)；
The second flow channel that control valve (1) including be connected to the hydraulic pump first runner (R1), is connected to the hydraulic pump
(L1), the third flow channel (R2) for being connected to hydraulic fluid reservoir (8), the 4th runner for being connected to the hydraulic fluid reservoir (8)
(L2), the first working hole for being connected to the first hydraulic fluid port of the hydraulic actuator (24) and hydraulic member is executed with described
Second working hole of the second hydraulic fluid port connection of part (24),
Wherein, first working hole may be selected to be connected to one in the first runner (R1) and third flow channel (R2), institute
Stating the second working hole may be selected to be connected to one in the second flow channel (L1) and the 4th runner (L2).
2. hydraulic system according to claim 1, which is characterized in that the control valve (1) further includes being located at described first
The first valve (2) in runner (R1), be located at the second valve (4) of the second flow channel (L1), be located at the third flow channel (R2)
In third valve (3) and the 4th valve (5) that is located in the 4th runner (L2).
3. hydraulic system according to claim 2, which is characterized in that
First valve (2) is flow control valve；And/or
Second valve (4) is flow control valve；And/or
The third valve (3) is flow control valve；And/or
4th valve (5) is flow control valve.
4. hydraulic system according to claim 1, which is characterized in that the control valve (1) includes:
First control valve (1a), for the first runner (R1), third flow channel (R2) and first work to be arranged on it
Mouthful；And
First control valve (1b), and the first control valve (1a) split settings, and for the second flow channel to be arranged on it
(L1), the 4th runner (L2) and second working hole.
5. hydraulic system according to claim 1, which is characterized in that further including can be with the hydraulic actuator (24) even
Logical accumulator (18), the accumulator (18) are used to absorb the liquid during hydraulic actuator (24) are braked
It presses the hydraulic fluid of executive component discharge and/or is used for during the hydraulic actuator (24) start to described hydraulic
Executive component (24) provides hydraulic fluid.
6. hydraulic system according to claim 5, which is characterized in that
The accumulator (18) may be selected to be connected to one in the first working hole and the second working hole of the control valve (1),
To introduce the hydraulic fluid that the hydraulic pump provides,
The first hydraulic fluid port and the second hydraulic fluid with the hydraulic actuator (24) may be selected in the accumulator (18)
A connection in mouthful, to be provided during the hydraulic actuator (24) start to the hydraulic actuator (24)
Hydraulic fluid.
7. hydraulic system according to claim 6, which is characterized in that it further include reversal valve (10), the reversal valve (10)
The second working hole including the first fluid mouth and the control valve (1) that are connected to the first working hole of the control valve (1) connects
Logical second fluid mouth and the third fluid flow port being connected to the accumulator (18), the reversal valve (10) have first fluid mouth
With the second state of the first state of third fluid flow port conducting and the second fluid mouth and the conducting of third fluid flow port.
8. hydraulic system according to claim 7, which is characterized in that the reversal valve (10) includes:
First control fluid flow port, with the first working hole of the control valve (1) and the first liquid of the hydraulic actuator (24)
Pressure fluid flow port is connected to, for introducing the hydraulic fluid for making the reversal valve (10) switch to the first state；
Second control fluid flow port, with the second working hole of the control valve (1) and the second liquid of the hydraulic actuator (24)
Pressure fluid flow port is connected to, for introducing the hydraulic fluid for making the reversal valve (10) switch to second state.
9. hydraulic system according to claim 8, which is characterized in that further include:
First pipeline (6), including being connected to the first fluid mouth of the first working hole of control valve (1) and the reversal valve (10)
First end and second end with the second hydraulic fluid port of the hydraulic actuator (24)；And
Second pipeline (7), including being connected to the second fluid mouth of the second working hole of control valve (1) and the reversal valve (10)
First end and second end with the second hydraulic fluid port of the hydraulic actuator (24).
10. hydraulic system according to claim 7, which is characterized in that further include:
The first branch, the hydraulic fluid for exporting the third fluid flow port of the reversal valve (10) are defeated to the accumulator (18)
It send；
Second branch is used to convey the hydraulic fluid in the accumulator (18) to the hydraulic actuator (24), and
Valve, for controlling one in the first branch and second branch conducting.
11. hydraulic system according to claim 10, which is characterized in that the valve includes being located in the first branch
5th valve (11) and the 6th valve (14) being located in the second branch.
12. hydraulic system according to claim 7, which is characterized in that further include controller (13), for described hydraulic
Executive component controls the first branch conducting during braking, or be used to brake in the hydraulic actuator (24)
The second branch conducting is controlled in the process.
13. hydraulic system according to claim 7, which is characterized in that further include:
First overflow valve (9) is connected to the third fluid flow port of the reversal valve (10)；
Controller (13) is electrically connected with first overflow valve (9), in the accumulator (18) absorption and/or discharge liquor
First overflow valve (9) is closed when pressing fluid.
14. hydraulic system according to claim 5, which is characterized in that further include for will be in the accumulator (18)
Pressure is limited to predetermined value the second overflow valve (16) below.
15. hydraulic system according to claim 5, which is characterized in that further include the liquid for being discharged in accumulator (18)
The unloading flow path of fluid is pressed, unloads in flow path and is provided with feather valve (19).
16. hydraulic system according to claim 1, which is characterized in that the hydraulic actuator include hydraulic motor and
One in the hydraulic cylinder.
17. a kind of engineering truck, which is characterized in that including hydraulic system described in any one of claims 1 to 16.
18. engineering truck according to claim 15, which is characterized in that the engineering truck includes:
Vehicle frame,
Pivoting part is mounted on the vehicle frame, and can rotate relative to vehicle frame by center of rotation of vertical pivot center；
Work department is mounted on the pivoting part.
19. engineering truck according to claim 18, which is characterized in that the work department includes connecting with the pivoting part
The Excavating bucket of the working arm connect and the one end for the separate rotating part for being connected to the working arm.
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| CN201910130850.6A CN109695265B (en) | 2019-02-22 | 2019-02-22 | Hydraulic system and engineering vehicle |
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| CN201910130850.6A CN109695265B (en) | 2019-02-22 | 2019-02-22 | Hydraulic system and engineering vehicle |
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| CN109695265B CN109695265B (en) | 2023-12-15 |
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| CN109695265B (en) | 2023-12-15 |
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