CN108716492A - Multifunctional vehicle accessory control system and multifunctional vehicle - Google Patents
Multifunctional vehicle accessory control system and multifunctional vehicle Download PDFInfo
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- CN108716492A CN108716492A CN201810835054.8A CN201810835054A CN108716492A CN 108716492 A CN108716492 A CN 108716492A CN 201810835054 A CN201810835054 A CN 201810835054A CN 108716492 A CN108716492 A CN 108716492A
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- 239000012530 fluid Substances 0.000 claims abstract description 149
- 238000006073 displacement reaction Methods 0.000 claims description 46
- 238000005259 measurement Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 124
- 239000002828 fuel tank Substances 0.000 description 14
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000013024 troubleshooting Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot 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
- 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
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/65—Methods of control of the load sensing pressure
Landscapes
- 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 present invention relates to a kind of multifunctional vehicle accessory control system and multifunctional vehicle, wherein multifunctional vehicle accessory control system, multifunctional vehicle includes a variety of accessory executing agencies with different work function, and accessory control system includes：First control valve is connect with the rodless cavity of accessory executing agency, for controlling flow and pressure into rodless cavity and the fluid for flowing out rodless cavity；It with the second control valve, is connect with the rod chamber of accessory executing agency, for controlling flow and pressure into rod chamber and the fluid for flowing out rod chamber.The present invention both can be adjusted and control to the flow and pressure of the fluid of the rodless cavity into and out of accessory executing agency, the flow and pressure of the fluid of the rod chamber into and out of accessory executing agency can be adjusted and controlled again, it allows it to adapt to different operation accessories, meet different demands of the different operation accessories to flow and pressure, simplify the operating process after replacement operation accessory, improves accessory and replace efficiency.
Description
Technical field
The present invention relates to technical field of engineering machinery more particularly to a kind of multifunctional vehicle accessory control systems and multi-functional
Vehicle.
Background technology
When Multifunctional rescue vehicle is mainly used in the generation of the natural calamities such as earthquake, flood, landslide, landslide, mud-rock flow
It carries out road to rob logical, stone cleaning, bury people and object rescue, bar cutting, ruins cleaning etc., job requirements should
It realizes digging operation, while to be also equipped with several work accessory, realize that various engineering operation (for example cutting, snatch, shearing, is broken
It is broken etc.).
Currently, the function of the existing operation accessory for Multifunctional rescue vehicle is relatively simple, various operation accessories
Between interchangeability it is poor, cause to need constantly to replace different operation accessories in rescue and work by turns, easily cause
The crowded confusion of rescue site；And operating pressure and the flow parameter requirement of several work accessory are all different, need operator
Member adjusts time-consuming and laborious by adjusting manually, and is easy error.
Currently, the hydraulic valve versatility of existing control operation accessory is poor, a variety of different work accessories cannot be met
Different pressures demand, therefore, there is an urgent need for design a kind of to realize the control system quickly, efficiently switched between several work accessory
System.
It should be noted that the information for being disclosed in background of invention part is merely intended to increase the totality to the present invention
The understanding of background, and be not construed as recognizing or imply in any form the information constitute by those skilled in the art public affairs
The prior art known.
Invention content
The purpose of the present invention is to propose to a kind of multifunctional vehicle accessory control system and multifunctional vehicles, so that multi-function vehicle
Accessory control system can adjust the flow and pressure of accessory executing agency, to adapt to the different demands of different work accessory.
To achieve the above object, the present invention provides a kind of multifunctional vehicle accessory control system, multifunctional vehicle includes
A variety of accessory executing agencies with different work function, multifunctional vehicle accessory control system include：
First control valve is connect with the rodless cavity of accessory executing agency, enters rodless cavity and outflow rodless cavity for controlling
Fluid flow and pressure；With
Second control valve is connect with the rod chamber of accessory executing agency, enters rod chamber and outflow rod chamber for controlling
Fluid flow and pressure.
Optionally, the first control valve is proportional control valve, and the first hydraulic fluid port of the first control valve is connect with rodless cavity, the first control
Second hydraulic fluid port of valve processed is connect with oil sources, and the third hydraulic fluid port of the first control valve is connect with oil return line, and the first control valve is in first
When working position, the first hydraulic fluid port is connected to the second hydraulic fluid port, and third hydraulic fluid port blocks；When first control valve is in the second working position,
First hydraulic fluid port is connected to third hydraulic fluid port, and the second hydraulic fluid port blocks；And/or
Second control valve is proportional control valve, and the first hydraulic fluid port of the second control valve is connect with rod chamber, the second control valve
Second hydraulic fluid port is connect with oil sources, and the third hydraulic fluid port of the second control valve is connect with oil return line, and the second control valve is in the first working position
When, the first hydraulic fluid port is connected to the second hydraulic fluid port, and third hydraulic fluid port blocks；When second control valve is in the second working position, the first oil
Mouth is connected to third hydraulic fluid port, and the second hydraulic fluid port blocks.
Optionally, multifunctional vehicle accessory control system further includes：
First pilot control valve, the valve core movement for controlling the first control valve；With
Second pilot control valve, the valve core movement for controlling the second control valve.
Optionally, multifunctional vehicle accessory control system further includes controller, the first pilot control valve and/or the second guide
Control valve is solenoid electric valve, and the valve core movement of the first pilot control valve and/or the second pilot control valve is carried out by controller
Control.
Optionally, the oil inlet of the first pilot control valve is connected to oil sources, and is set between the first pilot control valve and oil sources
There is pressure reducing valve；And/or second the oil inlet of pilot control valve be connected to oil sources, and set between the second pilot control valve and oil sources
There is pressure reducing valve.
Optionally, multifunctional vehicle accessory control system further includes：
First displacement sensor, the spool displacement amount for measuring the first control valve；
Second displacement sensor, the spool displacement amount for measuring the second control valve；With
Controller, for according to the first control valve of measurement result pair of the first displacement sensor and second displacement sensor and
The spool displacement amount of second control valve is adjusted.
Optionally, multifunctional vehicle accessory control system further includes：
First pressure sensor, for measuring the pressure on the first connection oil circuit between the first control valve and rodless cavity；
Second pressure sensor, for measuring the pressure on the second connection oil circuit between the second control valve and rod chamber；
With
Controller, for connecting oil circuit according to first pressure sensor and the measurement result pair of second pressure sensor first
It is adjusted with the pressure on the second connection oil circuit.
Optionally, multifunctional vehicle accessory control system further includes：
First overflow valve, the connection oil circuit connection between oil inlet and the first control valve and rodless cavity, oil outlet with
Oil return line connects；With
Second overflow valve, the connection oil circuit connection between oil inlet and the second control valve and rod chamber, oil outlet with
Oil return line connects.
Optionally, multifunctional vehicle accessory control system further includes：
Variable pump；With
Load pressure feedback valve, the pressure feedback on oil feeding line for being used to the oil outlet with variable pump being connected to variable
The control terminal of pump, to realize the adjusting to the discharge capacity of variable pump according to the pressure fed back.
Optionally, load pressure feedback valve is proportional control valve, and the first hydraulic fluid port of load pressure feedback valve is connected to and becomes
On the oil feeding line of the oil outlet connection of amount pump, the second hydraulic fluid port of load pressure feedback valve and the control terminal of variable pump connect, and bear
The third hydraulic fluid port for carrying pressure feedback valve is connect with oil return line, and the first hydraulic fluid port of load pressure feedback valve and load pressure feedback valve
The connection of the second hydraulic fluid port, when load pressure feedback valve is in the first working position, third hydraulic fluid port and the first hydraulic fluid port and the second hydraulic fluid port
Connection oil communication；When load pressure feedback valve is in the second working position, third hydraulic fluid port blocks.
Optionally, the connection oil between the first hydraulic fluid port of load pressure feedback valve and the second hydraulic fluid port of load pressure feedback valve
Road is equipped with restricting element.
Optionally, multifunctional vehicle accessory control system further includes：
Third pilot control valve, the valve core movement for controlling load pressure feedback valve.
Optionally, multifunctional vehicle accessory control system further includes：
First pilot control valve, the valve core movement for controlling the first control valve；With
Second pilot control valve, the valve core movement for controlling the second control valve；
Wherein, the oil inlet of the first pilot control valve, the oil inlet of the second pilot control valve and third pilot control valve
Oil inlet is interconnected.
Optionally, multifunctional vehicle accessory control system further includes：
Controller；With
Alarm system, for detecting that the actual flow of accessory executing agency and actual pressure are unsatisfactory for presetting in controller
Alarm signal is sent out when condition.
Optionally, controller detects that the actual flow of accessory executing agency is Q, and accessory executing agency is required when working
Set flow as Q0, controller detects that the actual pressure P of accessory executing agency, accessory executing agency are required when working
Pressure P0 is set, preset condition includes：
Q=Q0, P>P0；Or
Q<Q0, P<P0；Or
Q>Q0。
To achieve the above object, the present invention also provides a kind of multifunctional vehicles, which is characterized in that including above-mentioned more work(
It can vehicle accessory control system.
Based on the above-mentioned technical proposal, the embodiment of the present invention be equipped with the first control valve and the second control valve, both can into and out of
The flow and pressure of the fluid of the rodless cavity of accessory executing agency are adjusted and control, and can be to executing machine into and out of accessory
The flow and pressure of the fluid of the rod chamber of structure are adjusted and control, and allow it to adapt to different operation accessories, meet
Different operation accessories simplifies the operating process after replacement operation accessory to the different demands of flow and pressure, improves accessory
Replace efficiency.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the hydraulic schematic diagram of multifunctional vehicle accessory control system one embodiment of the present invention.
Fig. 2 is the schematic diagram of multifunctional vehicle accessory control system one embodiment of the present invention.
Fig. 3 is the flow chart of multifunctional vehicle accessory control system one embodiment of the present invention.
In figure：
1, fuel tank；2, variable pump；3, third pressure sensor；4, pressure reducing valve；5, the 4th pressure sensor；6, third overflow
Valve；7, the 5th pressure sensor；8, load pressure feedback valve；9, third displacement sensor；10, third pilot control valve；11,
One pilot control valve；12, the second pilot control valve；13, the first control valve；14, the second control valve；15, the first displacement sensor；
16, second displacement sensor；17, the first overflow valve；18, the second overflow valve；19, first pressure sensor；20, second pressure passes
Sensor；21, accessory executing agency.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states.Obviously, described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term "center", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the scope of the present invention.
As shown in Figure 1, in an illustrative examples of multifunctional vehicle accessory control system provided by the invention, it is more
Function vehicle includes a variety of accessory executing agencies 21 with different work function, and multifunctional vehicle accessory control system includes the
One control valve 13 and the second control valve 14, the first control valve 13 are connect with the rodless cavity of accessory executing agency 21, for control into
Enter rodless cavity and flows out the flow and pressure of the fluid of rodless cavity；Second control valve 14 and the rod chamber of accessory executing agency 21 connect
It connects, for controlling flow and pressure into rod chamber and the fluid for flowing out rod chamber.
In above-mentioned illustrative examples, by the way that the first control valve 13 and the second control valve 14 is arranged, both can into and out of
The flow and pressure of the fluid of the rodless cavity of accessory executing agency 21 are adjusted and control, and can be to being executed into and out of accessory
The flow and pressure of the fluid of the rod chamber of mechanism 21 are adjusted and control, and allow it to adapt to different operation accessories,
Meet different demands of the different operation accessories to flow and pressure, simplify the operating process after replacement operation accessory, improves
Accessory replaces efficiency.
Further, the first control valve 13 is proportional control valve, and the first hydraulic fluid port of the first control valve 13 is connect with rodless cavity,
Second hydraulic fluid port of the first control valve 13 is connect with oil sources, and the third hydraulic fluid port of the first control valve 13 is connect with oil return line, the first control
When valve 13 is in the first working position, the first hydraulic fluid port of the first control valve 13 is connected to the second hydraulic fluid port of the first control valve 13, and first
The third hydraulic fluid port of control valve 13 blocks；When first control valve 13 is in the second working position, the first hydraulic fluid port of the first control valve 13 with
The third hydraulic fluid port of first control valve 13 is connected to, and the second hydraulic fluid port of the first control valve 13 blocks.
By adjusting the valve core movement of the first control valve 13, can adjust into and out of the rodless cavity of accessory executing agency 21
Flow and pressure.When spool is moved from the second working position to the first working position, the flow into rodless cavity gradually increases, when
When the opening of two hydraulic fluid ports reaches maximum, the flow into rodless cavity reaches maximum.It, can be with if necessary to carry out release to rodless cavity
By gradually increasing the opening of third hydraulic fluid port, so that the hydraulic oil of rodless cavity is passed through oil return line and flow back to fuel tank.
Second control valve 14 is proportional control valve, and the first hydraulic fluid port of the second control valve 14 is connect with rod chamber, the second control
Second hydraulic fluid port of valve 14 is connect with oil sources, and the third hydraulic fluid port of the second control valve 14 is connect with oil return line, and the second control valve 14 is in
When the first working position, the first hydraulic fluid port of the second control valve 14 is connected to the second hydraulic fluid port of the second control valve 14, the second control valve 14
Third hydraulic fluid port block；When second control valve 14 is in the second working position, the first hydraulic fluid port of the second control valve 14 and the second control
The third hydraulic fluid port of valve 14 is connected to, and the second hydraulic fluid port of the second control valve 14 blocks.
By adjusting the valve core movement of the second control valve 14, can adjust into and out of the rod chamber of accessory executing agency 21
Flow and pressure.When spool is moved from the second working position to the first working position, the flow into rod chamber gradually increases, when
When the opening of two hydraulic fluid ports reaches maximum, the flow into rod chamber reaches maximum.It, can be with if necessary to carry out release to rod chamber
By gradually increasing the opening of third hydraulic fluid port, so that the hydraulic oil of rod chamber is passed through oil return line and flow back to fuel tank.
Optionally, multifunctional vehicle accessory control system further includes the first pilot control valve 11 and the second pilot control valve
12, the first pilot control valve 11 is used to control the valve core movement of the first control valve 13, and the second pilot control valve 12 is for control the
The valve core movement of two control valves 14.
Further, multifunctional vehicle accessory control system further includes controller, the first pilot control valve 11 and/or second
Pilot control valve 12 is solenoid electric valve, and the valve core movement of the first pilot control valve 11 and/or the second pilot control valve 12 passes through
Controller is controlled.
Optionally, the oil inlet of the first pilot control valve 11 is connected to oil sources, and the first pilot control valve 11 and oil sources it
Between be equipped with pressure reducing valve 4；And/or second the oil inlet of pilot control valve 12 be connected to oil sources, and the second pilot control valve 12 and oil
Pressure reducing valve 4 is equipped between source.
By the way that pressure reducing valve 4 is arranged, the guide for being supplied to the first pilot control valve 11 and the second pilot control valve 12 can be made
The oil pressure of oil is more stablized, and control accuracy and stability to the first control valve 13 and the second control valve 14 are improved.
Optionally, multifunctional vehicle accessory control system further includes the first displacement sensor 15, second displacement sensor 16
And controller, the first displacement sensor 15 are used to measure the spool displacement amount of the first control valve 13, second displacement sensor 16 is used
In the spool displacement amount for measuring the second control valve 14, controller is used for according to the first displacement sensor 15 and second displacement sensor
16 measurement result pair the first control valve 13 and the spool displacement amount of the second control valve 14 are adjusted.
Specifically, controller can be to the actual displacement measured by the first displacement sensor 15 and second displacement sensor 16
Amount setting displacement required when working with accessory executing agency 21 is compared, the actual displacement amount obtained by measurement with set
Determine displacement it is inconsistent when, controller can pass through the valve core movement to the first pilot control valve 11 and the second pilot control valve 12
Control adjust the spool displacement amount of the first control valve 13 and the second control valve 14.
Optionally, multifunctional vehicle accessory control system further includes first pressure sensor 19 and second pressure sensor
20, first pressure sensor 19 is used to measure the pressure on the first connection oil circuit between the first control valve 13 and rodless cavity, the
Two pressure sensors 20 are used to measure the pressure on the second connection oil circuit between the second control valve 14 and rod chamber.Controller is also
It can be used for connecting oil circuit and second according to first pressure sensor 19 and the measurement result pair of second pressure sensor 20 first
Pressure on connection oil circuit is adjusted.
Specifically, controller can be to the actual pressure measured by first pressure sensor 19 and second pressure sensor 20
Required setting pressure is compared when working with accessory executing agency 21, the actual pressure obtained by measurement and setting pressure
When inconsistent, controller can by the control of the valve core movement to the first pilot control valve 11 and the second pilot control valve 12 come
The spool displacement amount of the first control valve 13 and the second control valve 14 is adjusted, and then adjusts the first connection oil circuit and the second connection oil circuit
On pressure.
Optionally, multifunctional vehicle accessory control system further includes the first overflow valve 17 and the second overflow valve 18, and first overflows
Flow valve 17 oil inlet and the first control valve 13 and rodless cavity between connection oil circuit connection, the oil outlet of the first overflow valve 17 with
Oil return line connects；Connection oil circuit connection between the oil inlet of second overflow valve 18 and the second control valve 14 and rod chamber, second
The oil outlet of overflow valve 18 is connect with oil return line.
Optionally, multifunctional vehicle accessory control system further includes variable pump 2 and load pressure feedback valve 8, load pressure
Feedback valve 8 for by the control terminal of the pressure feedback on the oil feeding line that be connected to the oil outlet of variable pump 2 to variable pump 2, with
The adjusting to the discharge capacity of variable pump 2 is realized according to the pressure fed back.
Optionally, load pressure feedback valve 8 is proportional control valve, the first hydraulic fluid port of load pressure feedback valve 8 be connected to
On the oil feeding line of the oil outlet connection of variable pump 2, the second hydraulic fluid port of load pressure feedback valve 8 connects with the control terminal of variable pump 2
It connects, the third hydraulic fluid port of load pressure feedback valve 8 is connect with oil return line, and the first hydraulic fluid port of load pressure feedback valve 8 is pressed with load
Second hydraulic fluid port of force feedback valve 8 is connected to, when load pressure feedback valve 8 is in the first working position, the third of load pressure feedback valve 8
The connection oil communication of hydraulic fluid port and the first hydraulic fluid port of load pressure feedback valve 8 and the second hydraulic fluid port of load pressure feedback valve 8；Load
When pressure feedback valve 8 is in the second working position, the third hydraulic fluid port of load pressure feedback valve 8 blocks.
Further, the company between the first hydraulic fluid port of load pressure feedback valve 8 and the second hydraulic fluid port of load pressure feedback valve 8
It connects oil circuit and is equipped with restricting element.By the way that restricting element is arranged, the pressure of the hydraulic oil of the control terminal of supply variable pump 2 can be made
More stablize, improves the precision and stability of control.
Optionally, multifunctional vehicle accessory control system further includes third pilot control valve 10, third pilot control valve 10
Valve core movement for controlling load pressure feedback valve 8.
Optionally, the oil inlet of the first pilot control valve 11, the oil inlet of the second pilot control valve 12 and third guide control
The oil inlet of valve 10 processed is interconnected.That is, the first pilot control valve 11, the second pilot control valve 12 and third pilot control valve 10
Pilot control source it is identical, be conducive to improve the consistency and stability to pilot control.
Optionally, multifunctional vehicle accessory control system further includes alarm system, and alarm system is used to detect in controller
Alarm signal is sent out when being unsatisfactory for preset condition to the actual flow and actual pressure of accessory executing agency 21.
Further, controller detects that the actual flow of accessory executing agency 21 is Q, when accessory executing agency 21 works
Required sets flow as Q0, and controller detects that the actual pressure P of accessory executing agency 21, accessory executing agency 21 work
When required setting pressure P0, preset condition includes：
Q=Q0, P>P0；Or
Q<Q0, P<P0；Or
Q>Q0。
When actual flow Q is equal to setting flow Q0, if actual pressure P is less than or equal to setting pressure P0, then it is assumed that be
Nominal situation；And if actual pressure P is more than setting pressure P0, for unusual service condition, control system breaks down, alarm system hair
Go out alarm signal, until trouble shooting.
When actual flow Q is less than setting flow Q0, it may be possible to cause because oil circuit pressure is excessively high, therefore practical at this time
It is all nominal situation that pressure P, which is greater than or equal to setting pressure P0,；And if actual pressure P is less than setting pressure P0, belongs to abnormal
Operating mode, control system break down, and alarm system sends out alarm signal, until trouble shooting.
And when actual flow Q is more than setting flow Q0, the size regardless of actual pressure P with setting pressure P0, all
Will be considered that it is that control system breaks down, alarm system sends out alarm signal, until trouble shooting, to ensure accessory executing agency
Flow do not exceed setting value.
Wherein, the actual flow Q for flowing through the first control valve 13 and the second control valve 14 can be according to the first displacement sensor
15 and the measured value of second displacement sensor 16 calculated by formula, specific calculation formula isWherein, C
For constant；A is the opening area of spool.
Based on above-mentioned multifunctional vehicle accessory control system, the present invention also proposes a kind of multifunctional vehicle, this is multi-functional
Vehicle includes above-mentioned multifunctional vehicle accessory control system.
Multifunctional vehicle includes a variety of operation accessories that can realize different work function, when multifunctional vehicle accessory controls
When the accessory executing agency of hydraulic fluid port A and hydraulic fluid port B access different work accessories in system, system is controlled by multifunctional vehicle accessory
The flow and pressure for adjusting to being adapted to property of system accessory executing agency, meet the different demands of operation accessory, simplify to replace and make
Operating process after industry accessory improves and replaces efficiency.
Multifunctional vehicle can be the mechanical equipments such as Multifunctional rescue vehicle.
Positive technique effect possessed by multifunctional vehicle accessory control system is equally applicable in above-mentioned each embodiment
Multifunctional vehicle, which is not described herein again.
An implementation of 1~3 pair of multifunctional vehicle accessory control system of the present invention and multifunctional vehicle below in conjunction with the accompanying drawings
The hydraulic principle and the course of work of example are described in detail：
As shown in Figure 1, in this embodiment, multifunctional vehicle accessory control system includes fuel tank 1, variable pump 2, third pressure
Force snesor 3, pressure reducing valve 4, the 4th pressure sensor 5, third overflow valve 6, the 5th pressure sensor 7, load pressure feedback valve
8, third displacement sensor 9, third pilot control valve 10, the first pilot control valve 11, the control of the second pilot control valve 12, first
Valve 13, the second control valve 14, the first displacement sensor 15, second displacement sensor 16, the first overflow valve 17, the second overflow valve
18, first pressure sensor 19, second pressure sensor 20, accessory executing agency 21.
Wherein, fuel tank 1 not only supplies hydraulic oil as the oil sources of system, but also is connected to the oil return line of system, so that each hydraulic pressure
Fuel tank 1 is flowed back in the oil return of element.The oil outlet of variable pump 2 respectively with pressure reducing valve 4, the 5th pressure sensor 7, load pressure feedback
Valve 8, the first control valve 13, the connection of the second control valve 14.
Load pressure feedback valve 8 is two-position three-way proportional valve, and the first hydraulic fluid port of load pressure feedback valve 8 is connected to and variable
On the oil feeding line of the oil outlet connection of pump 2, the second hydraulic fluid port of load pressure feedback valve 8 is connect with the control terminal of variable pump 2, is born
It carries and is connected with third pressure sensor 3 on the second hydraulic fluid port of pressure feedback valve 8 and the connection oil circuit of the control terminal of variable pump 2, bear
The third hydraulic fluid port for carrying pressure feedback valve 8 is connect with fuel tank 1, and the first hydraulic fluid port and load pressure feedback of load pressure feedback valve 8
Second hydraulic fluid port of valve 8 is connected to.When load pressure feedback valve 8 is in the first working position, third hydraulic fluid port and the first hydraulic fluid port and the second oil
Connection oil communication between mouthful, i.e. third hydraulic fluid port are connected to the first hydraulic fluid port, are also connected to the second hydraulic fluid port；Load pressure feedback valve
8 be in the second working position when, third hydraulic fluid port blocks.Third displacement sensor 9 is integrated in load pressure feedback valve 8.Load pressure
It is additionally provided with third overflow valve 6 between second hydraulic fluid port of force feedback valve 8 and the connection oil circuit and fuel tank 1 of the control terminal of variable pump 2.
The oil inlet of pressure reducing valve 4 is connected to the oil outlet of variable pump 2, and the oil outlet of pressure reducing valve 4 is controlled with third guide respectively
Valve 10 processed, the first pilot control valve 11 are connected to the second pilot control valve 12, and the spring cavity of pressure reducing valve 4 is connected to fuel tank 1.Oil return
Road is equipped with the 4th pressure sensor 5.
Third pilot control valve 10 be 3-position 4-way proportion magnetic valve, the first actuator port of third pilot control valve 10 with
First control terminal of load pressure feedback valve 8 is connected to, the second actuator port and load pressure feedback of third pilot control valve 10
Second control terminal of valve 8 is connected to, and the oil inlet of third pilot control valve 10 is connected to the oil outlet of pressure reducing valve 4, third guide control
The oil return opening of valve 10 processed is connected to fuel tank 1.When third pilot control valve 10 is in the first working position, the first actuator port with into
Hydraulic fluid port is connected to, and the second actuator port is connected to oil return opening；When third pilot control valve 10 is in the second working position, the first work
Hydraulic fluid port is connected to oil return opening, and the second actuator port is connected to oil inlet；When third pilot control valve 10 is in middle position, the first work
Make hydraulic fluid port and the second actuator port is connected to oil return opening, oil inlet blocks.The control terminal of third pilot control valve 10 can be by electricity
Control system is controlled.
First pilot control valve 11 be 3-position 4-way proportion magnetic valve, the first actuator port of the first pilot control valve 11 with
First control terminal of the first control valve 13 is connected to, and the of the second actuator port of the first pilot control valve 11 and the first control valve 13
Two control terminals are connected to, and the oil inlet of the first pilot control valve 11 is connected to the oil outlet of pressure reducing valve 4, the first pilot control valve 11
Oil return opening is connected to fuel tank 1.When the first pilot control valve 11 is in the first working position, the first actuator port connects with oil inlet
Logical, the second actuator port is connected to oil return opening；When the first pilot control valve 11 is in the second working position, the first actuator port with
Oil return opening is connected to, and the second actuator port is connected to oil inlet；When the first pilot control valve 11 is in middle position, the first actuator port
It is connected to oil return opening with the second actuator port, oil inlet blocks.The control terminal of first pilot control valve 11 can be by electric-control system
It is controlled.
Second pilot control valve 12 be 3-position 4-way proportion magnetic valve, the first actuator port of the second pilot control valve 12 with
First control terminal of the second control valve 14 is connected to, and the of the second actuator port of the second pilot control valve 12 and the second control valve 14
Two control terminals are connected to, and the oil inlet of the second pilot control valve 12 is connected to the oil outlet of pressure reducing valve 4, the second pilot control valve 12
Oil return opening is connected to fuel tank 1.When the second pilot control valve 12 is in the first working position, the first actuator port connects with oil inlet
Logical, the second actuator port is connected to oil return opening；When the second pilot control valve 12 is in the second working position, the first actuator port with
Oil return opening is connected to, and the second actuator port is connected to oil inlet；When the second pilot control valve 12 is in middle position, the first actuator port
It is connected to oil return opening with the second actuator port, oil inlet blocks.The control terminal of second pilot control valve 12 can be by electric-control system
It is controlled.
First control valve 13 is 3-position-3-way proportional control valve, the first hydraulic fluid port and the accessory executing agency of the first control valve 13
21 rodless cavity connection, the second hydraulic fluid port of the first control valve 13 are connect with oil sources, the third hydraulic fluid port of the first control valve 13 and oil return
Road connects.When first control valve 13 is in the first working position, the of the first hydraulic fluid port of the first control valve 13 and the first control valve 13
Two hydraulic fluid ports are connected to, and the third hydraulic fluid port of the first control valve 13 blocks；When first control valve 13 is in the second working position, the first control valve
13 the first hydraulic fluid port is connected to the third hydraulic fluid port of the first control valve 13, and the second hydraulic fluid port of the first control valve 13 blocks；First control
When valve 13 is in middle position, the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port block.First displacement sensor 15 is integrated in first
In control valve 13.
Second control valve 14 is 3-position-3-way proportional control valve, the first hydraulic fluid port and the accessory executing agency of the second control valve 14
21 rod chamber connection, the second hydraulic fluid port of the second control valve 14 are connect with oil sources, the third hydraulic fluid port of the second control valve 14 and oil return
Road connects.When second control valve 14 is in the first working position, the of the first hydraulic fluid port of the second control valve 14 and the second control valve 14
Two hydraulic fluid ports are connected to, and the third hydraulic fluid port of the second control valve 14 blocks；When second control valve 14 is in the second working position, the second control valve
14 the first hydraulic fluid port is connected to the third hydraulic fluid port of the second control valve 14, and the second hydraulic fluid port of the second control valve 14 blocks；Second control
When valve 14 is in middle position, the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port block.Second displacement sensor 16 is integrated in second
In control valve 14.
Connection oil circuit between the first hydraulic fluid port and the rodless cavity of accessory executing agency 21 of first control valve 13 is equipped with the
One pressure sensor 19, on the connection oil circuit between the first hydraulic fluid port and the rod chamber of accessory executing agency 21 of the second control valve 14
Equipped with second pressure sensor 20.
Connection oil circuit between the first hydraulic fluid port and the rodless cavity of accessory executing agency 21 of first control valve 13 and fuel tank 1 it
Between be equipped with the first overflow valve 17, between the first hydraulic fluid port and the rod chamber of accessory executing agency 21 of the second control valve 14 connection oil
The second overflow valve 18 is equipped between road and fuel tank 1.
Operating process：As shown in Fig. 2, according to operational requirements (such as cast-cutting saw, log grapple, hydraulic shear, quartering hammer), operation
After panel receives operational order input by user, control signal is sent out, is integrated in multifunctional vehicle accessory control system
Controller receives control signal, and each Hydraulic Elements is driven to act, and output hydraulic pressure oil to accessory executing agency 21 is completed relatively
The action answered.Different accessories (such as cast-cutting saw, log grapple, hydraulic shear, quartering hammer) are under the pressure of setting and flow parameter
The numeric feedback detected to controller is formed closed loop control by work, the pressure sensor and displacement sensor being integrated in system
System, while can also judge whether system breaks down according to the numerical value detected.
Specifically, as shown in figure 3, after operation accessory installs, multifunctional vehicle operation panel is equipped with START button,
After user clicks START button, into " type of selection operation accessory " interface.When controller is not received by control signal
When, the spool of the first pilot control valve 11 and the second pilot control valve 12 is in middle position, the control of the first control valve 13 and second
Valve 14 is also at middle position, and accessory executing agency 21 circulates without hydraulic oil, and accessory executing agency 21 does not act, at this time control system
System is in low pressure armed state.When for selecting accessory type, after controller receives control signal, sending out electric signal, the
One pilot control valve 11 and the second pilot control valve 12 export first pilot corresponding with electric signal under the action of electric signal
Power is to the control terminal of the first control valve 13 and the second control valve 14, and the first control valve 13 and the second control valve 14 are in corresponding guide
Under the action of pressure, spool is opened to corresponding size, reaches the requirement of pressure and flow control, while being integrated in the first control
The first displacement sensor 15, second displacement sensor 16,19 and of first pressure sensor in 13 and second control valve 14 of valve processed
The signal detected is fed back to controller by second pressure sensor 20, and controller is according to the pressure and flow signal pair of feedback
One pilot control valve 11 and the second pilot control valve 12 carry out correction control, form close loop control circuit, make accessory executing agency
21 accurately work according to the pressure of setting and flow parameter.
In addition, work as Q=Q0, when P > P0 or Q < Q0, P < P0 or Q > Q0, control system can also carry out automatic alarm,
Fault warning is sent out, until trouble shooting.
It, can be with by the explanation to multifunctional vehicle accessory control system of the present invention and multiple embodiments of multifunctional vehicle
See that multifunctional vehicle accessory control system and multifunctional vehicle embodiment of the present invention at least have the advantages that one or more of：
1, by the way that the first control valve and the second control valve is arranged, control stream can be reached by controlling the opening size of spool
The purpose of amount can also shunt direct oil return box, to reach pressure control if pressure is more than setting value in the intake section of spool
The purpose of system realizes the automatic adjustment of the pressure and flow of different work accessory, improves the suitability to different work accessory, nothing
Hardware facility need to additionally be increased or adjusted manually, accessory switch speed is fast, simple to operate；
2, pressure reducing valve is equipped between pilot control valve and oil sources, it is ensured that the stability of guide's oil pressure；
3, it is integrated with displacement sensor and pressure sensor in control system, flow and pressure can be supervised in real time
It surveys, and flow and pressure is adjusted in real time according to detected value；
4, control system is equipped with alarm system, can alarm unusual service condition.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (16)
1. a kind of multifunctional vehicle accessory control system, multifunctional vehicle includes that a variety of accessories with different work function execute
Mechanism (21), which is characterized in that including：
First control valve (13) is connect with the rodless cavity of the accessory executing agency (21), enters the rodless cavity for controlling
With the flow and pressure of the fluid for flowing out the rodless cavity；With
Second control valve (14) is connect with the rod chamber of the accessory executing agency (21), enters the rod chamber for controlling
With the flow and pressure of the fluid for flowing out the rod chamber.
2. multifunctional vehicle accessory control system according to claim 1, which is characterized in that first control valve (13)
The first hydraulic fluid port for proportional control valve, first control valve (13) is connect with the rodless cavity, first control valve (13)
The second hydraulic fluid port connect with oil sources, the third hydraulic fluid port of first control valve (13) is connect with oil return line, first control valve
(13) when being in the first working position, first hydraulic fluid port is connected to second hydraulic fluid port, and the third hydraulic fluid port blocks；Described
When one control valve (13) is in the second working position, first hydraulic fluid port is connected to the third hydraulic fluid port, and second hydraulic fluid port is cut
It is disconnected；And/or
Second control valve (14) is proportional control valve, and the first hydraulic fluid port and the rod chamber of second control valve (14) connect
It connects, the second hydraulic fluid port of second control valve (14) is connect with oil sources, the third hydraulic fluid port of second control valve (14) and oil return
Road connects, and when second control valve (14) is in the first working position, first hydraulic fluid port is connected to second hydraulic fluid port, institute
Third hydraulic fluid port is stated to block；When second control valve (14) is in the second working position, first hydraulic fluid port and third oil
Mouth connection, second hydraulic fluid port block.
3. multifunctional vehicle accessory control system according to claim 1, which is characterized in that further include：
First pilot control valve (11), the valve core movement for controlling first control valve (13)；With
Second pilot control valve (12), the valve core movement for controlling second control valve (14).
4. multifunctional vehicle accessory control system according to claim 3, which is characterized in that further include controller, it is described
First pilot control valve (11) and/or second pilot control valve (12) are solenoid electric valve, first pilot control valve
(11) and/or the valve core movement of second pilot control valve (12) is controlled by the controller.
5. multifunctional vehicle accessory control system according to claim 3, which is characterized in that first pilot control valve
(11) oil inlet is connected to oil sources, and pressure reducing valve (4) is equipped between first pilot control valve (11) and the oil sources；
And/or the oil inlet of second pilot control valve (12) is connected to oil sources, and second pilot control valve (12) with it is described
Pressure reducing valve (4) is equipped between oil sources.
6. multifunctional vehicle accessory control system according to claim 1, which is characterized in that further include：
First displacement sensor (15), the spool displacement amount for measuring first control valve (13)；
Second displacement sensor (16), the spool displacement amount for measuring second control valve (14)；With
Controller, for the measurement result pair according to first displacement sensor (15) and the second displacement sensor (16)
The spool displacement amount of first control valve (13) and second control valve (14) is adjusted.
7. multifunctional vehicle accessory control system according to claim 1, which is characterized in that further include：
First pressure sensor (19) connect oil for measuring first between first control valve (13) and the rodless cavity
The pressure of road；
Second pressure sensor (20) connect oil for measuring second between second control valve (14) and the rod chamber
The pressure of road；With
Controller, for the measurement result pair according to the first pressure sensor (19) and the second pressure sensor (20)
Pressure on the first connection oil circuit and the second connection oil circuit is adjusted.
8. multifunctional vehicle accessory control system according to claim 1, which is characterized in that further include：
First overflow valve (17), the connection oil circuit between oil inlet and first control valve (13) and the rodless cavity connect
It connects, oil outlet is connect with oil return line；With
Second overflow valve (18), the connection oil circuit between oil inlet and second control valve (14) and the rod chamber connect
It connects, oil outlet is connect with oil return line.
9. multifunctional vehicle accessory control system according to claim 1, which is characterized in that further include：
Variable pump (2)；With
Load pressure feedback valve (8), the pressure feedback on oil feeding line for being used to be connected to the oil outlet of the variable pump (2)
To the control terminal of the variable pump (2), to realize the adjusting to the discharge capacity of the variable pump (2) according to the pressure fed back.
10. multifunctional vehicle accessory control system according to claim 9, which is characterized in that the load pressure feedback
Valve (8) is proportional control valve, and the first hydraulic fluid port of the load pressure feedback valve (8) is connected to fuel-displaced with the variable pump (2)
On the oil feeding line of mouth connection, the second hydraulic fluid port of the load pressure feedback valve (8) connects with the control terminal of the variable pump (2)
It connects, the third hydraulic fluid port of the load pressure feedback valve (8) is connect with oil return line, and the first of the load pressure feedback valve (8)
Hydraulic fluid port is connected to the second hydraulic fluid port of the load pressure feedback valve (8), and the load pressure feedback valve (8) is in the first working position
When, the connection oil communication of the third hydraulic fluid port and first hydraulic fluid port and second hydraulic fluid port；The load pressure feedback
When valve (8) is in the second working position, the third hydraulic fluid port blocks.
11. multifunctional vehicle accessory control system according to claim 10, which is characterized in that the load pressure feedback
Connection oil circuit between first hydraulic fluid port of valve (8) and the second hydraulic fluid port of the load pressure feedback valve (8) is equipped with restricting element.
12. multifunctional vehicle accessory control system according to claim 9, which is characterized in that further include：
Third pilot control valve (10), the valve core movement for controlling the load pressure feedback valve (8).
13. multifunctional vehicle accessory control system according to claim 12, which is characterized in that further include：
First pilot control valve (11), the valve core movement for controlling first control valve (13)；With
Second pilot control valve (12), the valve core movement for controlling second control valve (14)；
Wherein, the oil inlet of first pilot control valve (11), the oil inlet of second pilot control valve (12) and described
The oil inlet of third pilot control valve (10) is interconnected.
14. multifunctional vehicle accessory control system according to claim 1, which is characterized in that further include：
Controller；With
Alarm system, actual flow and actual pressure for detecting the accessory executing agency (21) in the controller are not
Alarm signal is sent out when meeting preset condition.
15. multifunctional vehicle accessory control system according to claim 14, which is characterized in that the controller detects
The actual flow of the accessory executing agency (21) is Q, the accessory executing agency (21) setting flow required when working
For Q0, the controller detects the actual pressure P of the accessory executing agency (21), accessory executing agency (21) work
When required setting pressure P0, the preset condition includes：
Q=Q0, P>P0；Or
Q<Q0, P<P0；Or
Q>Q0。
16. a kind of multifunctional vehicle, which is characterized in that including such as claim 1~15 any one of them multifunctional vehicle category
Has control system.
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| CN201810835054.8A CN108716492A (en) | 2018-07-26 | 2018-07-26 | Multifunctional vehicle accessory control system and multifunctional vehicle |
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| CN201810835054.8A CN108716492A (en) | 2018-07-26 | 2018-07-26 | Multifunctional vehicle accessory control system and multifunctional vehicle |
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Effective date of registration: 20220729 Address after: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant after: Jiangsu Xugong Construction Machinery Research Institute Co.,Ltd. Address before: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant before: XCMG CONSTRUCTION MACHINERY Co.,Ltd. |
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Application publication date: 20181030 |