CN104929992B - Energy-saving design method for variable-load servo control system - Google Patents
Energy-saving design method for variable-load servo control system Download PDFInfo
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- CN104929992B CN104929992B CN201510183696.0A CN201510183696A CN104929992B CN 104929992 B CN104929992 B CN 104929992B CN 201510183696 A CN201510183696 A CN 201510183696A CN 104929992 B CN104929992 B CN 104929992B
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- 238000013461 design Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000004146 energy storage Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 26
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 8
- 239000002828 fuel tank Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 abstract description 5
- 238000011069 regeneration method Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 100
- 239000013589 supplement Substances 0.000 description 11
- 238000001802 infusion Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/04—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by varying the output of a pump with 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
-
- 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
Abstract
The invention relates to an energy-saving design method for a variable-load servo control system. According to a hydraulic system designed through the design method, fitting of matched load force is achieved through arbitrary combination of different pressure grades, and throttling losses of a valve port are reduced. Overall management of energy is achieved by means of an energy transmission unit and an energy storage unit. Control is conducted according to the working condition, so that regeneration and recycling of energy are achieved. The transmission efficiency of the system is improved on the premise that the control characteristic is guaranteed.
Description
Technical field
The invention belongs to hydraulic technique application, is related to a kind of energy-saving design method of varying load servo-control system.
Background technology
Hydraulic servocontrol as develop after the 20th century 50, sixties and formation emerging science and technology, with
The advantages of by means of its control accuracy height, fast response, stable drive, strong antijamming capability and high power density, in national defense industry, aviation
The fields such as space flight, nonferrous smelting, power engineering, Vehicle Engineering, petrochemical industry obtain important application.But due in conventional hydraulic
In transmission, mismatch due to there is substantial amounts of pressure unmatched, flow, cause substantial amounts of restriction loss and spill losses.Band
Carry out the problems such as Hydrauservo System transmission efficiency is low, caloric value is big, cause serious energy waste and environmental pollution, more very shadow
Ring the competitiveness and range of application to Hydraulic servo technology.Therefore seek a kind of new energy match servo-control system, it is maximum
Limit matched load power, reduces system spill losses and restriction loss, very urgent.
At present, the patent for Energy-saving Design of Hydraulic has a kind of engineering machinery load port disclosed in CN101413522A
Independent electrohydraulic load-sensitive energy regeneration hydraulic system, divided working status select control strategy, reduce the energy-conservation loss of system, realize
Surmount the energy regeneration of load；Pump control and valve control combine and realize speed and Energy Saving Control, but use range is limited, versatility
It is not strong.Disclosed in patent CN201575006U, a kind of start and stop of utilization Frequency Converter Control pump, discontinuous operation, reach the section of system
Energy.But the characteristics of being limited to the low-response of frequency conversion motor, should not use in the higher occasion of control accuracy requirement.Patent
A kind of positive flow hydraulic energy-saving control system disclosed in CN202215255U, by ratio of the logical groups to all pilot control signals
Compared with, maximum pilot pressure output control variable pump is adapted therewith, so as to reduce pump by-pass throttle lose.But logic valve group
Presence, not only increased the complexity of system, and also affect the response speed of system.Patent CN103174688A is disclosed
One kind reclaim rod chamber fluid when hydraulic cylinder piston rod stretches out using accumulator, during backhaul and pumping source is collectively as power source,
The hydraulic oil loss of return line and overflow passage is solved, energy-conservation purpose is reached, but without matching, valve port restriction loss is still tight
Weight.For the defect in the studies above, the technical problem to be solved is to provide a kind of varying load servo-control system
Energy-saving design method, the method, at the same consider energy regenerating and reduce restriction loss problem, full working scope cover.
The content of the invention
The purpose of the present invention is for the low problem of capacity usage ratio present in varying load Hydrauservo System, there is provided one
Plant the energy-saving design method of the varying load servo-control system matched based on carrying.
The purpose of the present invention is achieved through the following technical solutions：
Varying load SERVO CONTROL energy conserving system involved by the energy-saving design method of the present invention is by switch valve, motor, quantitative
Pump, check valve, relief valve, quantitative pump/motor, clutch, pump/motor, pressure transducer, accumulator, controller, servo
Valve, reversal valve, hydraulic cylinder, low-pressure reservoir and fuel tank composition, is characterized in that：Varying load SERVO CONTROL energy conserving system include 4 it is oily
Road, the different high-pressure oil passage H of respectively energy stores oil circuit R and three pressure ratings, middle force feed road M, low pressure oil way T；System
Middle dosing pump is driven by motor, and oil circuit is divided into three oil circuits in parallel in pumping hole：One connecting valve valve, plays pumping source Unloading Effect；
One connection safety valve, plays safety effect；One is connected to system high pressure oil circuit H Jing after pumping hole check valve, as working oil path,
High-pressure oil passage H connects four points of oil circuits again respectively, wherein a connection high pressure accumulator H, plays constant pressure source effect, and be connected to pressure
Sensor, collection pressure signal feed back to controller；One link variable pump/motor Jing after switch valve, leads to oil sump tank, as energy
A part for amount transfer unit；Remaining two oil circuits are connected in two switch valves of left and right, used as leading to hydraulic pressure
The high-pressure oil passage of cylinder；Middle force feed road M connects four points of oil circuits respectively, wherein a connection intermediate-pressure accumulator M, plays constant pressure source and make
With, and pressure transducer is connected to, collection pressure signal feeds back to controller；One connects quantitative pump/motor Jing after switch valve, leads to
Oil sump tank, as a part for energy transmission unit；Remaining two oil circuits are connected in two switch valves of left and right,
As the middle force feed road for leading to hydraulic cylinder；Low pressure oil way T connects three points of oil circuits, and two are connected to two switch valves of left and right
In one, as the low pressure oil way for leading to hydraulic cylinder, oil sump tank after remaining connection low-pressure reservoir；Energy stores oil circuit R
Three points of oil circuits of connection, wherein a connection energy storage accumulator R, plays energy storage effect, and is connected to pressure transducer, collection pressure letter
Number feed back to controller；One Jing after switch valve link variable pump/motor and fuel tank connect, and by clutch respectively with high pressure
The pump/motor of oil circuit, the quantitative pump/motor connection on middle force feed road, as a part for energy transmission unit；It is remaining one
Oil circuit connection safety valve, plays safeguard protection effect；Oil circuit Jing or so after two switch valves, Left-wing Federation's switch valve connects Jing after servo valve
One hydraulic fluid port of two position and four-way reversing valves, right switch valve are then directly connected to another hydraulic fluid port of two position and four-way reversing valves, two four-ways
Reversal valve oil-out difference connection liquid cylinder pressure into and out of hydraulic fluid port, two chamber of hydraulic cylinder is connected to pressure transducer respectively, collection pressure letter
Number feed back to controller；Hydraulic cylinder piston rod is connected to displacement transducer, and collection displacement signal feeds back to controller, controller it is defeated
Enter the displacement signal that the pressure signal and displacement transducer that signal is each pressure transducer collection is gathered, output signal is each for control
The signal of telecommunication of the make-and-break signal of switch valve, the commutation signal of reversal valve, control servo valve valve port opening and pump/motor.
The controller is PC industrial computers or Programmable Logic Controller.
The energy-saving design method of described varying load servo-control system, its energy-saving principle are specially：
The constant pressure oil circuit and energy stores oil circuit R of tri- pressure ratings of H, M, T are set in system, without spill losses, are only deposited
Lose in the off-load of dosing pump；By hydraulic cylinder into and out of the high, medium and low different pressures grade of oil circuit any combination of two, at most
9 kinds of power outputs of different sizes are drawn, controller flexibly controls the transfer sequence of different pressures grade combination, exports hydraulic cylinder
Power is matched with carrying fitting to greatest extent, reduces the restriction loss of servo valve valve port；Each pressure rating oil circuit (except T) Jing energy
Amount transfer unit is connected with energy stores oil circuit R, and controller efficiently, rationally controls each switch valve, variable according to feedback signal
The constant pressure oil circuit and energy stores oil circuit R of pump/motor, effectively three pressure ratings of management, (standard is differential to realize the transmission of energy
Loop and equivalent differential circuit) and energy storage (recovery of energy), improve the energy saving of system.
The constant pressure oil circuit combination of two of three described pressure ratings, can arrange more pressure ratings on this basis
With energy transmission unit, often add a pressure rating, that is, increase 2n+1 kind force combinations, the grade of exerting oneself of hydraulic cylinder will more
It is intensive, strengthen the ability of fitting varying load power, obtain more preferable energy-saving effect.
Advantages of the present invention：
1) efficiency high.In traditional hydraulic system, there is larger spill losses and damage with throttling in pumping hole, throttle orifice
Lose, and varying load servo energy-saving control system, the design of partial pressure grade, being matched by carrying, any pressure rating is two-by-two
Combination, realizes substantially the matching of carrying, reduces valve port restriction loss.And system, without overflow, energy is recyclable, therefore the energy
Utilization rate is high, good energy-conserving effect.
2) energy regeneration.Can only produce the differential circuit of standard in traditional hydraulic system, and varying load energy-saving servo control
System processed, due to the presence of energy transmission unit, making different pressures grade constitute equivalent differential circuit becomes possibility, realizes
The regeneration of energy, further enhances the energy-saving effect of system.
3) energy regenerating is utilized.Varying load servo energy-saving control system, increased energy stores oil circuit R, in energy regenerating
Pattern storage energy, so that other mode of operation energy discharge, reduces the input of system.
4) full working scope is covered.Present invention covers load, the various operating modes of direction of motion change, can reach energy-conservation effect
Really, applied range, full working scope are covered.
Description of the drawings
The structural representation of Fig. 1 carrying fitting matchings of the present invention；
The schematic diagram of Fig. 2 varying load servo-control systems of the present invention；
The controller function module map of Fig. 3 varying load servo-control systems of the present invention；
The schematic diagram of Fig. 4 standard differential circuits of the present invention；
The schematic diagram of the equivalent differential circuit of Fig. 5 present invention；
Fig. 6 standard energies of the present invention reclaim the schematic diagram in loop；
Fig. 7 equivalent energies of the present invention reclaim the schematic diagram in loop.
In figure：1st, switch valve, 2, motor, 3, dosing pump, 4, individual event valve, 5, relief valve, 6, pump/motor, 7, clutch
Device, 8, quantitative pump/motor, 9, fuel tank, 10, pressure transducer, 11, accumulator, 12, low-pressure reservoir, 13, controller, 14, servo
Valve, 15, reversal valve, 16, hydraulic cylinder, 17, displacement transducer.
Specific embodiment
Varying load SERVO CONTROL energy conserving system is mainly made up of 4 oil circuits, respectively energy stores oil circuit R and three pressure
The different high-pressure oil passage H of grade, middle force feed road M, low pressure oil way T.In system, dosing pump 3 is driven by motor 2, the outlet of dosing pump
Divide three oil circuits, be connected with the oil-in of check valve 4, relief valve 5.1, switch valve 1 respectively；Relief valve 5.1, switch valve 1 go out
Hydraulic fluid port is directly connected with fuel tank 9；The oil-out of check valve 4 meets high-pressure oil passage H, high-pressure oil passage H respectively with high pressure accumulator 11.2,
Pressure transducer 10.2, two switch valves 1.4 of left and right, 1.7 oil-ins, 1.2 oil-in of energy transmission unit switch valve are connected；In
Force feed road M is passed with intermediate-pressure accumulator 11.3, pressure transducer 10.3, two switch valves 1.5 of left and right, 1.8 oil-ins, energy respectively
Pass 1.4 oil-in of unit switch valve to be connected；Low pressure oil way T respectively with low-pressure reservoir 12, left and right two switch valves 1.6,1.9 oil-feeds
Mouth is connected；The direct connected tank of 12 oil-out of low-pressure reservoir；Energy stores oil circuit R respectively with storage accumulator 11.1, pressure sensing
Device 10.1,5.2 oil-in of relief valve, 1.3 oil-in of energy transmission unit switch valve are connected；Energy transmission unit switch valve 1.2,
1.3rd, 1.4 oil-outs connect pump/motor 6.1, pump/motor 6.2 and quantitative pump/motor 8 respectively；Pump/motor
6.1st, pump/motor 6.2 and quantitative 8 another hydraulic fluid port of pump/motor directly take back fuel tank；Pump/motor 6.1, variable pump/horse
Quantitatively connect up to 6.2 and by clutch 7.1,7.2 between pump/motor 8；1.4,1.5,1.6 oil-out of Left-wing Federation's switch valve collects company
Connect 14 oil-in of servo valve；14 oil-out of servo valve connects two position and four-way reversing valves, 15 oil-in；Right switch valve 1.7,1.8,
1.9 oil-outs collect connection two position and four-way reversing valves, 15 oil-in；Two position and four-way reversing valves, 15 oil-out distinguishes connection liquid cylinder pressure
Rodless cavity and rod chamber, the rodless cavity and rod chamber of hydraulic cylinder connect pressure transducer 10.4,10.5, piston rod connection position respectively
Displacement sensor 17；Controller respectively with pressure transducer 10.1,10.2,10.3,10.4,10.5, displacement transducer 17, switch valve
1.1st, 1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9, servo valve 14, reversal valve 15, pump/motor 6.1,6.2 are electrically connected
Connect.
The operation principle of the present invention is as follows：
As shown in Fig. 2 input displacement signal transmission is to controller, pressure transducer 10.4,10.5 real-time detection hydraulic cylinders
The pressure in two chambers, the displacement of 17 real-time detection piston rod of displacement transducer, direction and load that controller is moved according to piston rod
Power FL=paA1-pbA2Size, direction, select the combination of suitable pressure rating, make exportable power F=p of hydraulic cylinder1A1-p2A2
With FLDifference Δ Fmin=F-FLMinimum, reduces the restriction loss on discharge opeing servo valve 14.For system as shown in Figure 2, according to
The direction of different pressure rating combinations, carrying and motion, can be divided into general mode, differential mode and energy recuperation mode three
Plant mode of operation.In the course of work, hydraulic cylinder oil-out Jing servo valves connect pressure rating T, are defined as general mode；Hydraulic cylinder is transported
Dynamic direction is in opposite direction with carrying, and oil-out Jing servo valves connect non-pressure grade T, are defined as differential mode；Press hydraulic cylinder
Whether the pressure rating that two chambers are connected is equal, is divided into standard differential mode and equivalent differential mode again.Pressure rating is equal, then for
Standard differential mode, is otherwise equivalent differential mode, respectively as shown in Figure 3, Figure 4.Hydraulic cylinder direction and load force direction
Together, it is defined as energy recuperation mode.Whether it is T by two chamber inlet pressure grade of hydraulic cylinder, is divided into standard energy again and reclaims mould
Formula and differential energy take-back model.Inlet pressure grade is T, then be energy recuperation mode, otherwise reclaims mould for differential energy
Formula, respectively as shown in Figure 5, Figure 6.Controller 13 according to residing mode of operation, respectively to energy transmission unit, energy stores oil circuit
R, dosing pump, unloader are adjusted, each pressure rating of rational allocation, make each pressure rating keep constant pressure, are ensureing that control is special
Property on the premise of, reduce system power attenuation.
Concrete operation step is as follows：
When controller 13 is by judging, when identifying system is in normal mode of operation, hydraulic cylinder in-line connection hydraulic oil
Road H or middle force feeds road M, high-pressure oil passage H or middle force feeds road M are system dynamic source.It is when power source oil circuit is high-pressure oil passage H, first
It is that high-pressure oil passage H supplements fluid first to start energy stores oil circuit R, and switch valve 1.3,1.2 is opened, and clutch 7.1 is fitted, 7.2 points
From pump/motor 6.1 immobilizes after setting up discharge capacity.Controller 13 is according to pressure transducer 10.1,10.2 feedback signal realities
When adjust 6.2 discharge capacity of pump/motor, make rotary shaft balance, maintain high-pressure oil passage H constant pressures.When energy stores oil circuit R is pressed
After power is reduced to the setting lowest limit, switch valve 1.2,1.3 disconnects, and clutch 7.1,7.2 is separated, and energy stores oil circuit R quits work,
It is that high-pressure oil passage H supplements fluid to change by dosing pump 3.Controller 13 completes fluid infusion task by the break-make of controlling switch valve 1.1.When
When power source oil circuit is middle force feed road M, it is that middle force feed road M supplements fluid also to take the lead in starting energy stores oil circuit R, switch valve 1.3,
1.4 open, and clutch 7.1 is separated, 7.2 laminatings.Controller 13 is according to pressure transducer 10.1,10.3 feedback signal real-time adjustments
6.2 discharge capacity of pump/motor, makes rotary shaft balance, and road M constant pressures are pressed oil in maintenance.When energy stores oil circuit R reduced pressure
To the setting lowest limit, switch valve 1.3 disconnects, and energy stores oil circuit R quits work, and it is middle force feed road M makeup oils to change by dosing pump 3
Liquid.Switch valve 1.2,1.4 is opened, and is immobilized after the adjustment of 6.1 discharge capacity of pump/motor, the adjustment of 6.2 discharge capacity of pump/motor
It is zero, the monitoring pressure transducer 10.2 of controller 13,10.3 feedback signals complete middle pressure by the break-make of controlling switch valve 1.1
The fluid infusion task of oil circuit M.
When controller 13 by judge, identifying system in standard deviation start building operation mode when, high-pressure oil passage H or middle force feeds road
M devotes oneself to work, and system is its supplement fluid.When the identification high-pressure oil passage H of controller 13 is working oil path, starts energy first and deposit
Oil storage road R is that high-pressure oil passage H supplements fluid, and switch valve 1.2,1.3 is opened, and clutch 7.1 is fitted, 7.2 separate, variable pump/horse
Immobilize up to after 6.1 setting discharge capacities.Controller 13 is according to pressure transducer 10.1,10.2 feedback signal real-time adjustment variables
6.2 discharge capacity of pump/motor, maintains high-pressure oil passage H constant pressures.After energy stores oil circuit R reduced pressure is to the setting lowest limit, switch valve
1.2nd, 1.3 disconnect, and clutch 7.1,7.2 is separated, and energy stores oil circuit R quits work, and change and are mended for high-pressure oil passage H by dosing pump 3
Oil-filling.Controller 13 completes fluid infusion task by the break-make of controlling switch valve 1.1.In controller 13 is recognized pressing oil road M is
During working oil path, it is that middle force feed road M supplements fluid also to take the lead in starting energy stores oil circuit R, and switch valve 1.3,1.4 is opened, clutch
Device 7.2 is fitted.Controller 13 according to pressure transducer 10.1,10.3 feedback signal real-time adjustment pump/motor, 6.2 discharge capacity,
Road M constant pressures are pressed oil in maintenance.After energy stores oil circuit R reduced pressure is to the setting lowest limit, switch valve 1.3 disconnects, energy stores
Oil circuit R quits work, and it is that middle force feed road M supplements fluid to change by dosing pump 3.Switch valve 1.2,1.4 is opened, pump/motor 6.1
Discharge capacity adjustment immobilizes, and 6.2 discharge capacity of pump/motor is adjusted to zero, and the monitoring pressure transducer 10.2,10.3 of controller 13 is anti-
Feedback signal, completes the fluid infusion task of middle force feed road M by the break-make of controlling switch valve 1.1.When controller 13 is by judging, identification
When system is in equivalent differential mode of operation, high-pressure oil passage H and middle force feed road M devotes oneself to work, and system is its supplement fluid.Work as control
When device processed 13 judges high-pressure oil passage H for power oil-duct, it is that high-pressure oil passage H supplements fluid, switch to start energy stores oil circuit R first
Valve 1.2,1.3,1.4 is opened, and clutch 7.1,7.2 is fitted, and pump/motor 6.1 immobilizes after setting up discharge capacity.Controller 13
According to pressure transducer 10.1,10.2 feedback signal real-time adjustment pump/motor, 6.2 discharge capacity, rotary shaft balance is made, tieed up
Hold high-pressure oil passage H constant pressures.After energy stores oil circuit R reduced pressure is to the setting lowest limit, switch valve 1.3 disconnects, pump/motor
6.2 discharge capacities are adjusted to zero, and energy stores oil circuit R quits work, and it is that high-pressure oil passage H supplements fluid to change by dosing pump 3.Controller 13
Fluid infusion task is completed by the break-make of controlling switch valve 1.1.Road M is pressed oil in controller 13 judges as power oil-duct when, also rate
It is that middle force feed road M supplements fluid first to start energy stores oil circuit R, and switch valve 1.2,1.3,1.4 is opened, and clutch 7.1,7.2 is pasted
Close.Controller 13 makes rotary shaft according to pressure transducer 10.1,10.3 feedback signal real-time adjustment pump/motor, 6.2 discharge capacity
Balance, presses oil road M constant pressures in maintenance.After energy stores oil circuit R reduced pressure is to the setting lowest limit, switch valve 1.3 disconnects,
6.2 discharge capacity of pump/motor is adjusted to zero, and energy stores oil circuit R quits work, and it is middle force feed road M makeup oils to change by dosing pump 3
Liquid.Switch valve 1.2,1.4 is opened, and clutch 7.1,7.2 is fitted, and the adjustment of 6.1 discharge capacity of pump/motor immobilizes, controller
13 monitoring pressure transducers 10.2,10.3 feedback signals, complete the fluid infusion of middle force feed road M by the break-make of controlling switch valve 1.1
Task.
When controller 13 is by judging, when identifying system is in standard energy recovery operation pattern, high-pressure oil passage H or middle pressures
Oil circuit M connects oil-discharging cavity, and system reclaims its energy.When controller 13 judges high-pressure oil passage H for oil extraction, start energy stores oil
Road R storage energies, switch valve 1.2,1.3 are opened, and clutch 7.1 is fitted, 7.2 separate, after pump/motor 6.1 sets up discharge capacity
Immobilize.Controller 13 is made according to pressure transducer 10.1,10.2 feedback signal real-time adjustment pump/motor, 6.2 discharge capacity
Rotary shaft balance, absorbs high-pressure oil passage H energy.Road M is pressed oil in controller 13 judges, during oil extraction, to start energy stores
Oil circuit R storage energies, switch valve 1.3,1.4 are opened, and clutch 7.1 is separated, 7.2 laminatings.Controller 13 is according to pressure transducer
10.1st, 10.3 feedback signal real-time adjustment pump/motor, 6.2 discharge capacity, makes rotary shaft balance, and road M energy is pressed oil in absorption
Amount.
When controller 13 is by judging, when identifying system is in differential energy recovery operation pattern, start energy stores oil
Road R storage energies, switch valve 1.2,1.3,1.4 are opened, and clutch 7.1,7.2 is fitted, after pump/motor 6.1 sets up discharge capacity
Immobilize.Controller 13 is according to 10.1,10.2,10.3 feedback signal real-time adjustment pump/motor of pressure transducer, 6.2 row
Amount, makes rotary shaft balance, absorbs the energy from high-pressure oil passage H or middle force feeds road M.
Technical scheme is not limited to the embodiment, if other people design and institute's partial pressure in the present invention
Rate range has a little difference, or pressure rating number difference, is not construed as and difference of the invention.
Claims (3)
1. a kind of energy-saving design method of varying load servo-control system, the varying load SERVO CONTROL involved by energy-saving design method
Energy conserving system is by switch valve, motor, dosing pump, check valve, relief valve, quantitative pump/motor, clutch, pump/motor, pressure
Force transducer, accumulator, controller, servo valve, reversal valve, hydraulic cylinder, low-pressure reservoir and fuel tank composition, is characterized in that：Become negative
Carrying SERVO CONTROL energy conserving system includes 4 oil circuits, the different high-pressure oil passage of respectively energy stores oil circuit R and three pressure ratings
H, middle force feed road M, low pressure oil way T；In system, dosing pump is driven by motor, and oil circuit is divided into three oil circuits in parallel in pumping hole：One
Connecting valve valve, plays pumping source Unloading Effect；One connection safety valve, plays safety effect；One is connected to Jing after pumping hole check valve
System high pressure oil circuit H, used as working oil path, high-pressure oil passage H connects four points of oil circuits again respectively, wherein a connection high-voltage energy-storage
Device H, plays constant pressure source effect, and is connected to pressure transducer, and collection pressure signal feeds back to controller；One connects Jing after switch valve
Pump/motor, leads to oil sump tank, as a part for energy transmission unit；Remaining two oil circuits are connected to left and right two
One in switch valve, as the high-pressure oil passage for leading to hydraulic cylinder；Middle force feed road M connects four points of oil circuits respectively, wherein one
Connection intermediate-pressure accumulator M, plays constant pressure source effect, and is connected to pressure transducer, and collection pressure signal feeds back to controller；One Jing
Connect quantitative pump/motor after switch valve, lead to oil sump tank, as a part for energy transmission unit；Remaining two oil circuits connect respectively
One be connected in two switch valves of left and right, as the middle force feed road for leading to hydraulic cylinder；Low pressure oil way T connects three points of oil circuits,
Two be connected in two switch valves of left and right, used as the low pressure oil way for leading to hydraulic cylinder, a remaining connection is low
Oil sump tank after force feed case；Energy stores oil circuit R connects three points of oil circuits, wherein a connection energy storage accumulator R, plays energy storage and make
With, and pressure transducer is connected to, collection pressure signal feeds back to controller；One Jing after switch valve link variable pump/motor with
Fuel tank is connected, and is connected with the quantitative pump/motor of the pump/motor of high-pressure oil passage, middle force feed road by clutch respectively, is made
For a part for energy transmission unit；A remaining oil circuit connection safety valve, plays safeguard protection effect；Oil circuit Jing or so two is opened
After closing valve, Left-wing Federation's switch valve connects a hydraulic fluid port of two position and four-way reversing valves Jing after servo valve, and right switch valve is then directly connected to two
Another hydraulic fluid port of position and four-way reversing valve, two position and four-way reversing valve oil-outs difference connection liquid cylinder pressure into and out of hydraulic fluid port, hydraulic cylinder two
Chamber is connected to pressure transducer respectively, and collection pressure signal feeds back to controller；Hydraulic cylinder piston rod is connected to displacement transducer, collection
Displacement signal feeds back to controller, and the input signal of controller is the pressure signal and displacement transducer of each pressure transducer collection
The displacement signal of collection, output signal are to control the make-and-break signal of each switch valve, the commutation signal of reversal valve, control servo valve valve
The signal of telecommunication of mouth aperture and pump/motor.
2. the energy-saving design method of varying load servo-control system according to claim 1, is characterized in that：The controller
For PC industrial computers or Programmable Logic Controller.
3. the energy-saving design method of varying load servo-control system according to claim 1, is characterized in that：Arrange in system
The constant pressure oil circuit and energy stores oil circuit R of tri- pressure ratings of H, M, T, without spill losses, only exists the off-load loss of dosing pump；
By hydraulic cylinder into and out of the high, medium and low different pressures grade of oil circuit any combination of two, at most draw 9 kinds it is of different sizes defeated
Exert oneself, controller flexibly control different pressures grade combination transfer sequence, make hydraulic cylinder power output to greatest extent with carrying
Fitting matching, reduces the restriction loss of servo valve valve port；Each pressure rating oil circuit Jing energy transmissions unit and energy in addition to T oil circuits
Amount storage oil circuit R connections, controller efficiently, rationally control each switch valve, pump/motor, effectively manage according to feedback signal
The constant pressure oil circuit and energy stores oil circuit R of three pressure ratings, realizes the transmission and energy storage of energy.
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| CN105697475B (en) * | 2016-03-16 | 2017-08-29 | 太原理工大学 | A kind of potential energy recycling system and method for high-order extractor |
| CN105715597B (en) * | 2016-03-18 | 2018-07-20 | 中冶赛迪工程技术股份有限公司 | Constant backpressure Direct Drive Electro-hydraulic Servo System and its control method |
| CN109654079B (en) * | 2017-10-12 | 2024-02-20 | 华东交通大学 | Full-switch valve combined outlet throttle load port independent control valve |
| CN108953306B (en) * | 2018-08-26 | 2021-01-08 | 燕山大学 | Direct-drive type volume control electro-hydraulic servo control system of duplex pump |
| CN109296597A (en) * | 2018-11-06 | 2019-02-01 | 广州晶品智能压塑科技股份有限公司 | Hydraulic station pressure regulating system |
| CN111828409A (en) * | 2020-07-23 | 2020-10-27 | 中国人民解放军陆军装甲兵学院 | Hydraulic drive unit based on two-stage energy supply and load port independent valve control technology |
| CN111828411B (en) * | 2020-07-24 | 2022-03-01 | 中国人民解放军陆军装甲兵学院 | Hydraulic system based on two-stage energy supply and independent valve control of load port and control method |
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