CN107448440B - Back pressure and the electric-hydraulic combined regulation multi executors system of power oil - Google Patents
Back pressure and the electric-hydraulic combined regulation multi executors system of power oil Download PDFInfo
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- CN107448440B CN107448440B CN201710830443.7A CN201710830443A CN107448440B CN 107448440 B CN107448440 B CN 107448440B CN 201710830443 A CN201710830443 A CN 201710830443A CN 107448440 B CN107448440 B CN 107448440B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of back pressure and the electric-hydraulic combined regulation multi executors system of power oil, have additional hydrodynamic regulation unit, back pressure regulates and controls unit, controller, switchover control valve, hydraulic control one-way valve and pressure sensor, and pass through hydraulic energy electrical regeneration mode, the pressure of actuator oil back chamber is regulated and controled, realize that the pressure difference of multi executors system each actuator control valves under big load difference operating condition is equal, make to match needed for the output pressure and flow and each actuator of hydraulic pump, eliminate the inconsistent generated restriction loss of load, it solves the problems, such as that construction machinery hydraulic oil tank is small and causes hydraulic oil fever and aging, reduce discharge, improve efficiency.
Description
Technical field
The present invention relates to a kind of control systems of multi executors in hydraulic control technology, especially a kind of to be used for engineer equipment
Power matching and the electrohydraulic control technology for reducing the loss of multi executors system pressure difference.
Background technique
Currently, the non-rice habitats such as various types engineering machinery, road building machine, mining machinery, forestry machinery and agricultural machinery move
Dynamic equipment, generallys use the hydraulic pump as power source of internal combustion engine drives, through multi-way valve and pipeline distribution and transmitting power, control
The hydraulic system of multiple actuator composite moves, this is also that hydraulic technique is most widely used, most important field, and feature is power
High, compact-sized, the handling good and environmental suitability of density is strong, but fatal deficiency is that capacity usage ratio is low, and complete machine efficiency only has
20% or so.Studies have shown that the loss of control valve port significant energy, engine work long hours in inefficient area and action potential
The energy dissipation of conversion process is to cause that engineer equipment installed power is big, fuel consumption is big, discharge difference and serious of fever
Source, the energy dissipation that wherein control valve generates are the most serious.In published patent of invention " using the energy conservation of load-sensitive technology
Type shield segment assembling positions electrohydraulic control system, and CN103032396A " for multi executors system often there is load to change
The wide feature of range makes the output pressure of hydraulic pump that load be followed to change and change always by using Ioad-sensing control principle
Become, avoids original system always with energy dissipation caused by maximum working pressure fuel feeding, reduce restriction loss and overflow
Loss, but match since the output pressure of pump can only be loaded with highest, and for multi executors system, larger load variations institute
Causing the restriction loss of low-load actuator control valves can not eliminate always, and exactly multi executors system is most for this partial loss
Main energy consumption source, accounts for the 35% ~ 39% of engine output.
In addition, engineering machinery load wide variation in actual operation, power source is caused to often operate in inefficient
Working region increases the discharge and energy consumption of power source, and therefore, it is necessary to the situations of change according to load, using torque couple side
Formula adds the power source of other forms, to match to original power source, such as electronic/power generation of oil electric mixed dynamic mode
The hydraulic pump/motor of machine or hydraulic hybrid mode absorbs main power source in low load working condition auxiliary power source as loading
Power, to promote the efficiency of main power source, and under big load operating condition, it is simultaneously auxiliary that auxiliary power source discharges absorbed energy
Help main power source that load is driven to do work together, but existing hybrid power mode, the energy that auxiliary power source provides will be by control
The second throttle of valve generates loss, and function is only to match the operating point of engine, after adding this unit, complete machine at
Originally it will increase many, and the cost recovery period is longer, influence to promote and apply.
Summary of the invention
For deficiency existing for above-mentioned existing load-sensitive multi executors system, the present invention provides a kind of back pressure and power oil
Electric-hydraulic combined regulation multi executors system utilizes structure using energy regeneration, controls each actuator other than highest load
Back oil cavity pressure, make each actuator oil suction chamber pressure and it is all control valve port pressure difference it is identical, make the pressure of hydraulic pump
It is matched with flow with each hydraulic actuator, eliminates multi executors system throttles caused by load variations and lose, held by control
The back oil cavity pressure of row device realizes regulation power source operating point, and regulation unit nonrigid can be connected with power source, will
Hybrid power function further expands to action potential recycling, reduces throttling loss, promotes energy-saving effect and shortens hardware and throws
Return period is provided, is conducive to promote and apply.
To achieve the goals above, the technical scheme is that a kind of back pressure and the electric-hydraulic combined regulation of power oil are held more
Row device system, includes power source, Main Hydraulic Pump, transfer case, safety valve, the first hydraulic actuator, the second hydraulic actuator, and
Three hydraulic actuators, the first control valve, the second control valve, third control valve.It is characterized in that further having additional hydrodynamic regulation list
Member, the first back pressure regulation unit, the second back pressure regulation unit, controller, the first switchover control valve, the second switchover control valve, the
Three switchover control valves, the first hydraulic control one-way valve, the second hydraulic control one-way valve, third hydraulic control one-way valve, first pressure sensor, second
Pressure sensor, third pressure sensor, the 4th pressure sensor, the 5th pressure sensor, the 6th pressure sensor.
The actuator port of first control valve is connected to the actuator port of the first hydraulic actuator respectively, the work of the second control valve
Make hydraulic fluid port to be connected to the actuator port of the second hydraulic actuator respectively, the actuator port of third control valve respectively with third is hydraulic holds
The actuator port of row device is connected to；The oil outlet of Main Hydraulic Pump respectively with the first control valve, the second control valve and third control valve
Oil inlet connection, the oil return opening of the first control valve are connected to the oil outlet of the first hydraulic control one-way valve, the oil outlet of the second control valve
It is connected to the oil outlet of the second hydraulic control one-way valve, the oil outlet of third control valve is connected to the oil outlet of third hydraulic control one-way valve；
The output shaft of power source is connect with transfer case, and the input shaft of Main Hydraulic Pump is connect with transfer case；The hydraulic fluid port of first switchover control valve
A1 and hydraulic fluid port B1 are connected to the actuator port of the first hydraulic actuator respectively, and hydraulic fluid port A2 and hydraulic fluid port B2 points of the second switchover control valve
It is not connected to the actuator port of the second hydraulic actuator, the hydraulic fluid port A3 and hydraulic fluid port B3 of third switchover control valve are hydraulic with third respectively
The actuator port of actuator is connected to；The work with the first hydraulic actuator respectively of first pressure sensor, second pressure sensor
Hydraulic fluid port connection, third pressure sensor, the 4th pressure sensor are connected to the actuator port of the second hydraulic actuator respectively, and the 5th
Pressure sensor, the 6th pressure sensor are connected to the actuator port of third hydraulic actuator respectively；All pressure sensors, position
Displacement sensor, speed probe output signal be all connected to controller, these signals provide control after controller operation
First control valve, the second control valve, third control valve, the first switchover control valve, the second switchover control valve, third switchover control valve
With the signal of rotational speed governor movement.
The first back pressure regulation unit includes back pressure regulation dynamoelectric machine, and back pressure regulates and controls hydraulic pump/motor,
Back pressure regulates and controls hydraulic accumulator, repairing check valve, speed probe, the 7th pressure sensor, the first displacement sensor, revolving speed control
Device processed, bidirectional DC-DC converter, supercapacitor, power switch.Back pressure regulate and control hydraulic pump/motor hydraulic fluid port P1 and first turn
The hydraulic fluid port R2 connection of the hydraulic fluid port R1 and the second switchover control valve of control valve are changed, back pressure regulates and controls the hydraulic fluid port P2 and back of hydraulic pump/motor
The oil inlet of pressure regulation hydraulic accumulator, the 7th pressure sensor, the connection of repairing check valve oil outlet, the output of rotational speed governor
End is connect with back pressure regulation dynamoelectric machine, and one end of bidirectional DC-DC converter is connected to the DC bus of rotational speed governor
On, the other end of bidirectional DC-DC converter is connect with supercapacitor, the input of the output end and rotational speed governor of power switch
End connection, speed probe detect the revolving speed of back pressure regulation dynamoelectric machine, and it is hydraulic that the first displacement sensor detects back pressure regulation
The pivot angle of pump/motor.
First back pressure regulates and controls unit, and back pressure regulates and controls dynamoelectric machine and coaxially connects with back pressure regulation hydraulic pump/motor
It connects, they can connect with transfer case, can also be not connected to transfer case.
Second back pressure regulates and controls unit, and composition and internal connection relationship are identical as the first back pressure regulation unit, area
It is not back pressure regulation dynamoelectric machine, back pressure regulation hydraulic pump/motor is not connected to transfer case；Back pressure regulates and controls hydraulic pump/motor
Hydraulic fluid port P1 be connected to the hydraulic fluid port R3 of third switchover control valve.
The hydrodynamic regulation unit be include hydrodynamic regulation dynamoelectric machine electrically, the second inverter moves
Power regulation dynamoelectric machine drive shaft be connected on transfer case, the output end of the second inverter be connected to hydrodynamic regulation it is electronic/
Generator, the input terminal of the second inverter and the DC bus of rotational speed governor connect.
The hydrodynamic regulation unit is hydraulic way, includes hydrodynamic regulation hydraulic pump/motor, hydrodynamic regulation liquid
Press accumulator, the 8th pressure sensor, second displacement sensor；The drive shaft of hydrodynamic regulation hydraulic pump/motor is connected to transfer
On case, the oil inlet P 5 of hydrodynamic regulation hydraulic pump/motor and actuator port, the 8th pressure sensing of hydrodynamic regulation hydraulic accumulator
The connection of device actuator port, the hydraulic fluid port P6 of hydrodynamic regulation hydraulic pump/motor are connected to fuel tank, and second displacement sensor is mounted on power
Regulate and control on hydraulic pump/motor, detects its discharge capacity.
The Main Hydraulic Pump is that the volume adjustable hydraulic pump of load-sensitive type, constant-pressure variable hydraulic pump, variable displacement with constant power are hydraulic
Pump, inverted flux control type hydraulic pump, ratio become the hydraulic pump that displacement hydraulic pump and these modes combine.
First control valve, the second control valve and the third control valve can be the multiple directional control valve of four sides linkage,
It can be the hydraulic valve bank of oil inlet and outlet independent control, control mode can be Hydraulic guide control, manually control and electric ratio
Control.
First hydraulic actuator, the second hydraulic actuator, third hydraulic actuator can be hydraulic cylinder, can also be with
It is hydraulic motor.
First switchover control valve, the second switchover control valve, third switchover control valve can be hydraulic control, can also
To be electric signal control.
Hydraulic fluid port A1, hydraulic fluid port B1, the hydraulic fluid port A2 of the second switchover control valve, hydraulic fluid port B2 of first switchover control valve, third
Hydraulic fluid port A3, the hydraulic fluid port B3 of switchover control valve be respectively with the first control valve oil inlet and outlet, the second control valve oil inlet and outlet, third control
Valve oil inlet and outlet connection processed, the hydraulic fluid port R1 of the first switchover control valve, the hydraulic fluid port R2 of the second switchover control valve and the first back pressure regulate and control
The hydraulic fluid port P1 connection of back pressure regulation hydraulic pump/motor in unit；The hydraulic fluid port R3 of third switchover control valve and the regulation of the second back pressure are single
The hydraulic fluid port P1 connection of back pressure regulation hydraulic pump/motor in member.
A kind of realization of back pressure and the electric-hydraulic combined regulation multi executors systems technology technical solution of power oil, with the prior art
It compares, achieves following advantage and good effect.
The present invention in existing system by adding hydrodynamic regulation unit, the first back pressure regulation unit, second by pressure regulation
Unit, controller, the first switchover control valve, the second switchover control valve, third switchover control valve, the first hydraulic control one-way valve, second
Hydraulic control one-way valve, third hydraulic control one-way valve, first pressure sensor, second pressure sensor, third pressure sensor, the 4th pressure
Force snesor, the 5th pressure sensor and the 6th pressure sensor；And by hydraulic energy electrical regeneration mode, to actuator oil return
The pressure of chamber is regulated and controled, so that multi executors system is under big load difference operating condition, the pressure difference of each actuator control valves
It is all equal, it is matched needed for the output pressure and flow and each actuator of hydraulic pump, thus it is inconsistent produced to eliminate load
Restriction loss.
This system is not necessarily to pressure difference compensation valve, is not also influenced by load difference, is accurately controlled and distributes flow, further drops
The restriction loss of low control valve control flow.
This system is controlled using new structure setting, includes the recycling function of action potential, i.e., using same set of hard
Part system, realizes the recycling of movable arm potential energy and rotary braking kinetic energy, and energy regenerating and elimination load variations throttling are lost
Overall-in-one control schema.
This system, by control actuator back oil cavity pressure, is adjusted engine working point, makes to send out using new structure setting
Motivation works in efficient operation region, meets the matched requirement of engine power.
This system complete machine control structure reduces the installed power of machine, reduces the fever of system, and increasing machine can
Continuous working period simultaneously reduces cooling power, solves that construction machinery hydraulic oil tank is small to cause hydraulic oil fever and aging to be asked
Topic.
This system complete machine structure scheme is removed with effectively disappearing on the basis of retaining existing multi executors steer mode advantage
The deficiency of original scheme, has that high energy efficiency, low emission, action potential recycle and power matching integration etc. is various excellent
Point.
Detailed description of the invention
Fig. 1 is that the back pressure regulation unit that this system contains electric driving force regulation unit and connect with transfer case controls three liquid
Press the circuit theory structure chart of actuator.
Fig. 2 is that the present invention regulates and controls unit containing hydraulic power and the back pressure connecting with transfer case regulation unit controls three liquid
Press the circuit theory structure chart of actuator.
Fig. 3 is that the circuit that the present invention controls three hydraulic actuators only with the back pressure regulation unit connecting with transfer case is former
Manage structure chart.
Fig. 4 be the present invention containing electric driving force regulation unit and separated with transfer case back pressure regulation unit control three it is hydraulic
The circuit theory structure chart of actuator.
Fig. 5 be the present invention containing hydraulic power regulation unit and separated with transfer case back pressure regulation unit control three it is hydraulic
The circuit theory structure chart of actuator.
Fig. 6 is the present invention only with the circuit theory for separating back pressure regulation unit three hydraulic actuators of control with transfer case
Structure chart.
In figure: 1, power source, 2, Main Hydraulic Pump, 3, transfer case, 4, safety valve, 5, hydrodynamic regulation dynamoelectric machine,
6, the first hydraulic actuator, the 7, second hydraulic actuator, 8, third hydraulic actuator, the 9, first control valve, the 10, second control
Valve, 11, third control valve, the 12, first switchover control valve, the 13, second switchover control valve, 14, third switchover control valve, 15,
One back pressure regulates and controls unit, 16, controller, 17, first pressure sensor, 18, second pressure sensor, 19, third pressure sensing
Device, the 20, the 4th pressure sensor, the 21, the 5th pressure sensor, the 22, the 6th pressure sensor, 23, back pressure regulation hydraulic energy-accumulating
Device, 25, back pressure regulation hydraulic pump/motor, 27, the electronic/engine of back pressure regulation, 28, repairing check valve, the 29, second back pressure tune
Control unit, 30, rotational speed governor, 31, bidirectional DC-DC converter, 32, supercapacitor, the 33, the 7th pressure sensor, 35, the
One displacement sensor, 37, speed probe, 38, power switch.39, hydrodynamic regulation hydraulic pump/motor, 40, hydrodynamic regulation liquid
Press accumulator, the 41, second inverter, the 42, the 8th pressure sensor, 43, second displacement sensor, 44, hydrodynamic regulation unit.
G1, the first hydraulic control one-way valve, G2, the second hydraulic control one-way valve, G3, third hydraulic control one-way valve, P1, back pressure regulation are hydraulic
Pump/motor oil inlet, P2, back pressure regulation hydraulic pump/motor oil outlet, P5, hydrodynamic regulation hydraulic pump/motor oil inlet, P6,
Hydrodynamic regulation hydraulic pump/motor oil outlet, A1, the first switchover control valve hydraulic fluid port I, the first switchover control valve of B1 hydraulic fluid port II, R1
One switchover control valve hydraulic fluid port III, the second switchover control valve of A2 hydraulic fluid port I, the second switchover control valve of B2 hydraulic fluid port II, the conversion control of R2 second
Valve oil mouth III processed, A3 third switchover control valve hydraulic fluid port I, B3 third switchover control valve hydraulic fluid port II, R3 third switchover control valve hydraulic fluid port
Ⅲ。
Specific embodiment
The explanation of a step is made to a specific embodiment of the invention with reference to the accompanying drawing.
Embodiment 1
As shown in Fig. 1, it is back pressure of the present invention and the electric-hydraulic combined regulation multi executors system embodiment 1 of power oil, contains
There are electric driving force regulation unit and the back pressure connecting with transfer case to regulate and control the circuit theory that unit controls three hydraulic actuators.It should
Power source 1 selects motor in system, and Main Hydraulic Pump 2 is using the volume adjustable hydraulic pump of inverted flux control, and transfer case 3 mainly turn round by transmitting
Square, each axle speed ratio are 1:1, and safety valve 4 sets pressure as 32 MPa, and the first hydraulic actuator 6 selects hydraulic cylinder, the second liquid
Actuator 7 is pressed equally to select hydraulic cylinder, third hydraulic actuator 8 selects hydraulic motor；First control valve 9, the second control valve 10
The proportional multi-way valve of inverted flux control is all made of with third control valve 11.Its constituent relation is further to have additional hydrodynamic regulation list
Member 44, the first back pressure regulate and control unit 15, and the second back pressure regulates and controls unit 29 and controller 16, and controller 16 uses 32 industry controls
Computer processed, the first switchover control valve 12 added, the second switchover control valve 13 and third switchover control valve 14 are all made of electrically
Control mode；First hydraulic control one-way valve G1, the second hydraulic control one-way valve G2 and third hydraulic control one-way valve G3 promoting menstruation are 32 mm；The
One pressure sensor 17, second pressure sensor 18, third pressure sensor 19, the 4th pressure sensor 20, the 5th pressure pass
Sensor 21, the 6th pressure sensor 22 pressure limit be 0-40 MPa.
Constituent relation is that the actuator port of the first control valve 9 is connected to the actuator port of the first hydraulic actuator 6 respectively, the
The actuator port of two control valves 10 is connected to the actuator port of the second hydraulic actuator 7 respectively, the working oil of third control valve 11
Mouth is connected to the actuator port of third hydraulic actuator 8 respectively；The oil outlet of Main Hydraulic Pump 2 respectively with the first control valve 9, second
Control valve 10 is connected to the oil inlet of third control valve 11, and the oil return opening of the first control valve 9 and the first hydraulic control one-way valve G1's goes out
Hydraulic fluid port connection, the oil outlet of the second control valve 10 are connected to the oil outlet of the second hydraulic control one-way valve G2, and third control valve 11 goes out
Hydraulic fluid port is connected to the oil outlet of third hydraulic control one-way valve G3；The output shaft of power source 1 is connect with transfer case 3, Main Hydraulic Pump 2 it is defeated
Enter axis to connect with transfer case 3；First switchover control valve hydraulic fluid port, I A1 and II B1 of the first switchover control valve hydraulic fluid port hydraulic fluid port is respectively with
The actuator port of one hydraulic actuator 6 is connected to, I A2 of the second switchover control valve hydraulic fluid port and II B2 of the second switchover control valve hydraulic fluid port difference
It is connected to the actuator port of the second hydraulic actuator 7, II B3 of I A3 of third switchover control valve hydraulic fluid port and third switchover control valve hydraulic fluid port
It is connected to respectively with the actuator port of third hydraulic actuator 8；First pressure sensor 17, second pressure sensor 18 are respectively with
The actuator port of one hydraulic actuator 6 is connected to, and third pressure sensor 19, the 4th pressure sensor 20 hydraulic are held with second respectively
The actuator port of row device 7 is connected to, the 5th pressure sensor 21, the 6th pressure sensor 22 respectively with third hydraulic actuator 8
Actuator port connection；All pressure sensors, displacement sensor, speed probe output signal be all connected to controller 16,
These signals provide control the first control valve 9, the second control valve 10, third control valve 11, first after 16 operation of controller
The signal that switchover control valve 12, the second switchover control valve 13, third switchover control valve 14 and rotational speed governor 37 act.
In specific implementation, the first back pressure regulates and controls unit 15 and the second back pressure regulation unit 29 uses identical composition and inside
Connection relationship, back pressure regulate and control dynamoelectric machine 27 and select synchronous permanent-magnet motor/generator, and back pressure regulates and controls hydraulic pump/motor 25 and selects
With axial plunger structure, back pressure regulates and controls hydraulic accumulator 23 and uses piston cylinder operator, and 32 mm are selected in oily check valve promoting menstruation；Revolving speed
The pressure limit of the high-precision encoder of the use of sensor 37, the 7th pressure sensor 33 and the 8th pressure sensor 42 is 40
MPa；First displacement sensor 35 and second displacement sensor 43 select differential transformer form, and rotational speed governor 37 uses frequency conversion
Control mode；Bidirectional DC-DC converter designed, designed, 32 capacity of supercapacitor are 30 farads, the specified function of power switch 38
Rate is 60 kW.Single 15 yuan of the regulation of first back pressure are with external and its internal connection relationship, back pressure regulation hydraulic pump/motor into
Hydraulic fluid port P1 is connected to the first switchover control valve hydraulic fluid port R1 and the second switchover control valve hydraulic fluid port R2, which regulates and controls hydraulic pump/motor
The oil outlet company of the oil inlet of hydraulic fluid port P2 and back pressure regulation hydraulic accumulator 23, the 7th pressure sensor 33, repairing check valve 28
It is logical；Pass through torque with transfer case 3 again after back pressure regulation dynamoelectric machine 27 and back pressure regulation hydraulic pump/motor 25 are coaxially connected
Coupled modes connection；The output end of rotational speed governor 37 is connect with back pressure regulation dynamoelectric machine 27, bidirectional DC-DC converter
31 one end is connected on the DC bus of rotational speed governor 37, the other end and supercapacitor of bidirectional DC-DC converter 31
32 connections, the output end of power switch 38 are connect with the input terminal of rotational speed governor 37, and speed probe 37 detects back pressure regulation
The revolving speed of dynamoelectric machine 27, the first displacement sensor 35 detect the pivot angle of back pressure regulation hydraulic pump/motor 25.
Connection relationship inside second back pressure regulation unit 29 is identical as the first back pressure regulation unit 15, and difference is and outside
Connection relationship, back pressure regulation hydraulic pump/motor oil inlet P 1 be connected to third switchover control valve hydraulic fluid port R3；Back pressure regulation electricity
Dynamic/generator 27 and back pressure regulation hydraulic pump/motor 39 are coaxially connected, but do not connect with transfer case 3.
Further selection hydrodynamic regulation unit 44 selects dynamoelectric machine, and drive shaft is directly connected to transfer case 3, and
It is provided with the second inverter 41, the output end of the second inverter 41 is connected to hydrodynamic regulation dynamoelectric machine 27 and controls its revolving speed,
The input terminal of second inverter 41 is connect with the DC bus of rotational speed governor 37.
Further the selection Main Hydraulic Pump 2 selects ratio to become displacement hydraulic pump.
First control valve 9, the second control valve 10 and third control valve 11 is further selected to select the more of four sides linkage
Way reversing valve, control mode select electric proportion pilot control.
Further selection first switchover control valve 12, the second switchover control valve 13 and third switchover control valve 14 select
With electrical control mode signal.
Embodiment 2
It as shown in Fig. 2, is back pressure of the present invention and the electric-hydraulic combined regulation multi executors system embodiment 2 of power oil, ---
Regulate and control unit containing hydraulic power and the back pressure connecting with transfer case 3 regulation unit controls the circuit original of three hydraulic actuators
Reason.
The composition and connection relationship of the present embodiment 2 are similar to Example 1, and difference is only that hydrodynamic regulation unit 44 uses liquid
Control mode is pressed, the hydrodynamic regulation hydraulic pump/motor 25 selects axial plunger structure, and drive shaft is directly connected to transfer case
On 3, actuator port, the 8th pressure sensing of hydrodynamic regulation hydraulic pump/motor oil inlet P 5 and hydrodynamic regulation hydraulic accumulator 40
The connection of 42 actuator port of device, hydrodynamic regulation hydraulic pump/motor oil outlet P6 are connected to fuel tank, and second displacement sensor 43 is mounted on
On hydrodynamic regulation hydraulic pump/motor 25, for detecting its swash plate pivot angle.
Embodiment 3
It as shown in Fig. 3, is back pressure of the present invention and the electric-hydraulic combined regulation multi executors system embodiment 3 of power oil, ---
The circuit theory of three hydraulic actuators is controlled only with the back pressure regulation unit connecting with transfer case 3.The present embodiment and implementation
The difference of example 1 and embodiment 2 is not include hydrodynamic regulation unit 44 in system.
Embodiment 4
It as shown in Fig. 4, is back pressure of the present invention and the electric-hydraulic combined regulation multi executors system embodiment 4 of power oil, ---
Regulate and control unit containing electric driving force and the back pressure regulation unit isolated with transfer case 3 controls the circuit original of three hydraulic actuators
Reason.The composition of the system is identical with the composition of embodiment 1, and difference is only the back pressure regulation in the first back pressure regulation unit
Hydraulic pump/motor 25 and back pressure regulation dynamoelectric machine 27 are not connect with transfer case 3.
Embodiment 5
It as shown in Fig. 5, is back pressure of the present invention and the electric-hydraulic combined regulation multi executors system embodiment 5 of power oil, ---
Regulate and control unit containing hydraulic power and separates the circuit theory that back pressure regulation unit controls three hydraulic actuators with transfer case 3.
The system composition of the present embodiment 5 is same as Example 2, and difference is only that the back pressure regulation in the first back pressure regulation unit 15 is hydraulic
Pump/motor 25 and back pressure regulation dynamoelectric machine 27 are not connect with transfer case 3.
Embodiment 6
It as shown in Fig. 6, is back pressure of the present invention and the electric-hydraulic combined regulation multi executors system embodiment 6 of power oil, ---
Only with the circuit theory for separating back pressure regulation unit three hydraulic actuators of control with transfer case 3.
The system composition of the present embodiment 6 is same as Example 3, and difference is only the back pressure in the first back pressure regulation unit 15
Regulation hydraulic pump/motor 25 and back pressure regulation dynamoelectric machine 27 are not connect with transfer case 3.
Claims (8)
1. a kind of back pressure and the electric-hydraulic combined regulation multi executors system of power oil, include: power source (1), Main Hydraulic Pump (2),
Transfer case (3), safety valve (4), the first hydraulic actuator (6), the second hydraulic actuator (7), third hydraulic actuator (8),
One control valve (9), the second control valve (10), third control valve (11), displacement sensor and speed probe；It is characterized by:
Further have additional: hydrodynamic regulation unit (44), the first back pressure regulation unit (15), the second back pressure regulation unit (29),
Controller (16), the first switchover control valve (12), the second switchover control valve (13), third switchover control valve (14), the first hydraulic control
Check valve G1, the second hydraulic control one-way valve G2, third hydraulic control one-way valve G3, first pressure sensor (17), second pressure sensor
(18), third pressure sensor (19), the 4th pressure sensor (20), the 5th pressure sensor (21) and the 6th pressure sensing
Device (22)；
The actuator port of first control valve (9) is connected to the actuator port of the first hydraulic actuator (6) respectively；Second control
The actuator port of valve (10) is connected to the actuator port of the second hydraulic actuator (7) respectively；The working oil of third control valve (11)
Mouth is connected to the actuator port of third hydraulic actuator (8) respectively；The oil outlet of Main Hydraulic Pump (2) respectively with the first control valve
(9), the second control valve (10) is connected to the oil inlet of third control valve (11), the oil return opening and the first liquid of the first control valve (9)
The oil outlet connection of check valve G1 is controlled, the oil outlet of the second control valve (10) is connected to the oil outlet of the second hydraulic control one-way valve G2,
The oil outlet of third control valve (11) is connected to the oil outlet of third hydraulic control one-way valve G3；The output shaft and transfer of power source (1)
Case (3) connection, the input shaft of Main Hydraulic Pump (2) are connect with transfer case (3)；The hydraulic fluid port A1 and hydraulic fluid port of first switchover control valve (12)
B1 is connected to the actuator port of the first hydraulic actuator (6) respectively, and hydraulic fluid port A2 and hydraulic fluid port B2 points of the second switchover control valve (13)
Be not connected to the actuator port of the second hydraulic actuator (7), the hydraulic fluid port A3 and hydraulic fluid port B3 of third switchover control valve (14) respectively with
The actuator port of third hydraulic actuator (8) is connected to；First pressure sensor (17), second pressure sensor (18) are respectively with
The actuator port of one hydraulic actuator (6) is connected to, and third pressure sensor (19), the 4th pressure sensor (20) are respectively with second
The actuator port of hydraulic actuator (7) is connected to, the 5th pressure sensor (21), the 6th pressure sensor (22) respectively with third liquid
Press the actuator port connection of actuator (8)；The output signal of all pressure sensors, displacement sensor and speed probe connects
Be connected to controller (16), signal provided after controller (16) operation control the first control valve (9), the second control valve (10),
Third control valve (11), the first switchover control valve (12), the second switchover control valve (13), third switchover control valve (14) and revolving speed
The signal of controller (30) movement；
First back pressure regulation unit (15) and the second back pressure regulation unit (29) include back pressure regulation dynamoelectric machine
(27), back pressure regulation hydraulic pump/motor (25), back pressure regulate and control hydraulic accumulator (23), repairing check valve (28), speed probe
(37), the 7th pressure sensor (33), the first displacement sensor (35), rotational speed governor (30), bidirectional DC-DC converter
(31), supercapacitor (32) and power switch (38), the two to connect and compose relationship identical；
First back pressure regulates and controls in unit (15): back pressure regulates and controls the hydraulic fluid port P1 and the first switchover control valve of hydraulic pump/motor (25)
(12) the hydraulic fluid port R2 connection of hydraulic fluid port R1 and the second switchover control valve (13), back pressure regulate and control the hydraulic fluid port P2 of hydraulic pump/motor (25)
Connect with the oil inlet, the 7th pressure sensor (33) and repairing check valve (28) oil outlet of back pressure regulation hydraulic accumulator (23)
Logical, the output end of rotational speed governor (30) is connect with back pressure regulation dynamoelectric machine (27), bidirectional DC-DC converter (31)
One end is connected on the DC bus of rotational speed governor (30), the other end and supercapacitor of bidirectional DC-DC converter (31)
(32) it connects, the output end of power switch (38) is connect with the input terminal of rotational speed governor (30), speed probe (37) detection
Back pressure regulates and controls the revolving speed of dynamoelectric machine, and the first displacement sensor (35) detects the pendulum of back pressure regulation hydraulic pump/motor (25)
Angle；Back pressure regulates and controls dynamoelectric machine (27) and back pressure regulation hydraulic pump/motor (25) is coaxially connected, they and transfer case (3) are even
It connects；
Second back pressure regulates and controls in unit (29): back pressure regulates and controls the hydraulic fluid port P1 and third switchover control valve of hydraulic pump/motor (25)
(14) hydraulic fluid port R3 connection；Back pressure regulates and controls dynamoelectric machine (27) and back pressure regulation hydraulic pump/motor (25) and transfer case (3)
Separation, other connection relationships are identical as the first back pressure regulation unit (15).
2. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: work as institute
Stating hydrodynamic regulation unit (44) to be includes hydrodynamic regulation dynamoelectric machine (5) and the second inverter (41) electrically；It is dynamic
The drive shaft of power regulation dynamoelectric machine (5) is connected on transfer case (3), and the output end of the second inverter (41) is connected to dynamic
Power regulates and controls on dynamoelectric machine (5), and the input terminal of the second inverter (41) is connect with the DC bus of rotational speed governor (30).
3. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: work as institute
It include that hydrodynamic regulation hydraulic pump/motor (39), hydrodynamic regulation are hydraulic when to state hydrodynamic regulation unit (44) be hydraulic control architectures
Accumulator (40), the 8th pressure sensor (42) and second displacement sensor (43)；The drive of hydrodynamic regulation hydraulic pump/motor (39)
Moving axis is connected on transfer case (3), the oil inlet P 5 and hydrodynamic regulation hydraulic accumulator of hydrodynamic regulation hydraulic pump/motor (39)
(40) actuator port and the connection of the 8th pressure sensor (42) actuator port, the hydraulic fluid port of hydrodynamic regulation hydraulic pump/motor (39)
P6 is connected to fuel tank, and second displacement sensor (43) is mounted on hydrodynamic regulation hydraulic pump/motor (39), detects its discharge capacity.
4. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: described
Main Hydraulic Pump (2) is the volume adjustable hydraulic pump of load-sensitive type.
5. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: described
First control valve (9), the second control valve (10) and third control valve (11) are the multiple directional control valve of four sides linkage, or disengaging
One of the hydraulic valve bank of hydraulic fluid port independent control, control mode are Hydraulic guide controls, manually control with electrical-liquid control.
6. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: first
Hydraulic actuator (6), the second hydraulic actuator (7), third hydraulic actuator (8) are hydraulic cylinder or hydraulic motor.
7. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: first
Switchover control valve (12), the second switchover control valve (13), third switchover control valve (14) are hydraulic control or electric signal control
System.
8. back pressure according to claim 1 and the electric-hydraulic combined regulation multi executors system of power oil, it is characterised in that: described
The hydraulic fluid port A1 and hydraulic fluid port B1 of first switchover control valve (12), the hydraulic fluid port A2 and hydraulic fluid port B2 of the second switchover control valve (13), third turn
The hydraulic fluid port A3 and hydraulic fluid port B3 for changing control valve (14) are to pass in and out respectively with the first control valve (9) oil inlet and outlet, the second control valve (10)
Hydraulic fluid port is connected to the oil inlet and outlet of third control valve (11), the hydraulic fluid port R1 of the first switchover control valve (12), the second switchover control valve
(13) hydraulic fluid port R2 is connected to the hydraulic fluid port P1 of back pressure regulation hydraulic pump/motor (25) in the first back pressure regulation unit (15)；Third
The hydraulic fluid port of back pressure regulation hydraulic pump/motor (25) in the hydraulic fluid port R3 of switchover control valve (14) and the second back pressure regulation unit (29)
P1 connection.
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| CN201710830443.7A CN107448440B (en) | 2017-09-15 | 2017-09-15 | Back pressure and the electric-hydraulic combined regulation multi executors system of power oil |
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| CN201710830443.7A CN107448440B (en) | 2017-09-15 | 2017-09-15 | Back pressure and the electric-hydraulic combined regulation multi executors system of power oil |
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| CN107448440B true CN107448440B (en) | 2019-05-03 |
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| CA3012374A1 (en) * | 2017-03-21 | 2018-09-21 | Jiangsu University | Self-adaptive control system for feeding mouth opening of round bale bundling machine and controlling method thereof |
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|---|---|---|---|---|
| US6912849B2 (en) * | 2002-04-09 | 2005-07-05 | Komatsu Ltd. | Cylinder driving system and energy regenerating method thereof |
| CN102086796A (en) * | 2009-12-03 | 2011-06-08 | 日立建机株式会社 | Hydraulic working rig |
| CN102108948A (en) * | 2010-12-28 | 2011-06-29 | 湖南山河智能机械股份有限公司 | Renewable energy power generating system applicable to electrocar for loading, unloading and transporting |
| CN103066897A (en) * | 2013-01-18 | 2013-04-24 | 太原理工大学 | Electromotor energy storage braking system and control method |
| CN104675773A (en) * | 2015-03-06 | 2015-06-03 | 浙江大学 | Pure water hydraulic system of roller press for precisely controlling rolling speed and method of pure water hydraulic system for precisely controlling rolling speed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006336845A (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd | Working machine |
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2017
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|---|---|---|---|---|
| US6912849B2 (en) * | 2002-04-09 | 2005-07-05 | Komatsu Ltd. | Cylinder driving system and energy regenerating method thereof |
| CN102086796A (en) * | 2009-12-03 | 2011-06-08 | 日立建机株式会社 | Hydraulic working rig |
| CN102108948A (en) * | 2010-12-28 | 2011-06-29 | 湖南山河智能机械股份有限公司 | Renewable energy power generating system applicable to electrocar for loading, unloading and transporting |
| CN103066897A (en) * | 2013-01-18 | 2013-04-24 | 太原理工大学 | Electromotor energy storage braking system and control method |
| CN104675773A (en) * | 2015-03-06 | 2015-06-03 | 浙江大学 | Pure water hydraulic system of roller press for precisely controlling rolling speed and method of pure water hydraulic system for precisely controlling rolling speed |
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