CN105485069B - Electric-control hydraulic energy-saving device for load-sensitive ratio control system and working method - Google Patents
Electric-control hydraulic energy-saving device for load-sensitive ratio control system and working method Download PDFInfo
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- CN105485069B CN105485069B CN201610086687.4A CN201610086687A CN105485069B CN 105485069 B CN105485069 B CN 105485069B CN 201610086687 A CN201610086687 A CN 201610086687A CN 105485069 B CN105485069 B CN 105485069B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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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
- F15B21/14—Energy-recuperation means
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- General Engineering & Computer Science (AREA)
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- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an electric-control hydraulic energy-saving device for a load-sensitive ratio control system. The electric-control hydraulic energy-saving device is mainly used for the multi-load hydraulic system. According to the multi-load load-sensitive ratio control energy-saving device, maximum pressure required by loads is output through a load-sensitive pump; low-pressure load loops are judged through pressure sensors, then liquid-energy feedback devices are connected to the portions in front of throttling elements of low-pressure loops in series to achieve depressurization instead of the throttling elements, and feedback power is automatically adjusted. Pressure energy throttled by the low-pressure loops is fed back to an outlet of the load-sensitive pump through the liquid-energy feedback devices to be supplied to high-pressure loops for use. By means of the electric-control hydraulic energy-saving device, the problems that an existing multi-load hydraulic system device is large in hydraulic loss, low in efficiency, large in generated heat and the like are mainly solved.
Description
Technical field
The present invention relates to the energy-conservation neck in hydraulic drive and control field, particularly load-sensitive proportional hydraulic control system
Domain.
Background technology
Load-sensitive proportional hydraulic control system used in engineering machinery is usually with a load-reacting now
Hydraulic pump gives multiple load fuel feeding simultaneously, is selected the maximum pressure in multiple load pressures to become as load-sensitive by several shuttle valves
The Ioad-sensing control signal of amount hydraulic pump, the discharge capacity for controlling load-reacting hydraulic pump make the output pressure of pump higher than load
Maximum pressure certain numerical value.If load pressure difference is very big, and high-voltage load speed is low, low-voltage load speed high, system
The fluid Jing speed control valves in supply low-voltage load loop just throttle very big pressure, produce very big power loss, system
Efficiency it is very low, and oil liquid temperature is raised, it is necessary to which the heat dissipation equipment for being equipped with relatively high power is reduced to oil liquid temperature and is
The scope that system is required, so increased the consumption of power again.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention to provide a kind of for load-sensitive ratio
The electric-controlled hydraulic energy saver of control system and method for work, system control electromagnetism by the pressure transducer on load circuit and change
To valve, before automatically liquid energy feedback device being sealed in the restricting element of low tension loop, restricting element is replaced to realize blood pressure lowering, and automatically
Adjust the size of feedback power；Liquid energy feedback device feeds back to going out for load sensitive pump the pressure energy that low tension loop throttling is fallen
Mouthful, hydraulic slip is substantially reduced, system effectiveness is improve, system heat generation and fluid temperature rise is reduced, system outfit is reduced
Heat dissipation equipment specification.
Technical scheme：For achieving the above object, technical scheme is as follows：
A kind of electric-controlled hydraulic energy saver for load-sensitive ratio control system, including load sensitive pump, a liquid
Can feedback device, No. two liquid energy feedback devices, 2/2-way solenoid directional control valve, No. two 2/2-way solenoid directional control valves, three
Number 2/2-way solenoid directional control valve, shuttle valve, No. two shuttle valves, pressure transducer, No. two pressure transducers, No. three pressure
Sensor, proportional reversing valve, No. two proportional reversing valves, No. three proportional reversing valves, motor load device, an oil cylinder loads
Device, No. two oil cylinder load devices, relief valve and fuel tanks；The load sensitive pump oil-out be divided into all the way, two tunnels, three tunnels, four
Road, five roads and six tunnels, all the way number 2/2-way solenoid directional control valve of Jing be connected with an oil-in of a proportional reversing valve, two tunnels
No. bis- 2/2-way solenoid directional control valves of Jing are connected with an oil-in of No. two proportional reversing valves, the three 2/2-way electromagnetism of tunnel three
Reversal valve is connected with an oil-in of No. three proportional reversing valves, and four tunnels are connected with the oil-in of a liquid energy feedback device, five tunnels
It is connected with the oil-in of No. two liquid energy feedback devices, six tunnels are connected with the oil-in of relief valve；The oil-out of the relief valve with
Fuel tank connects；The oil-in of the load sensitive pump is connected with fuel tank.The oil-out of a number liquid energy feedback device is divided into one
Road and two tunnels, the oil-out of all the way with number 2/2-way solenoid directional control valve are connected with one oil-in of proportional reversing valve together
Connect, the oil-out of two roads and No. two 2/2-way solenoid directional control valves is connected with the oil-in of No. two proportional reversing valves together.It is described
The oil-out of No. two liquid energy feedback devices is divided into all the way with two tunnels, the oil-out one of all the way with No. two 2/2-way solenoid directional control valves
Rise and be connected with the oil-in of No. two proportional reversing valves, the oil-out of two roads and No. three 2/2-way solenoid directional control valves together with No. three
The oil-in connection of proportional reversing valve.Two oil-outs of a number proportional reversing valve are connected with motor load device；Described one
The load pressure port of number proportional reversing valve be divided into all the way, two roads and three tunnels, be connected with a power termination device all the way, two tunnels one
The one oil-in connection of number shuttle valve, three tunnels are connected with a pressure transducer；Two oil-outs of No. two proportional reversing valves with
The connection of number oil cylinder load device, the load pressure port of No. two proportional reversing valves be divided into all the way, two tunnels, three-way and four-way,
It is connected with No. two liquid energy feedback devices all the way, two tunnels are connected with another oil-in of a shuttle valve, three tunnels and a liquid energy feedback
Device connects, and four tunnels are connected with No. two pressure transducers；Two oil-outs of No. three proportional reversing valves and No. two oil cylinder loads
Device connects, No. three proportional reversing valve load pressure ports be divided into all the way, two roads and three tunnels, all the way with No. two liquid energy feedbacks dresses
Connection is put, two tunnels are connected with an oil-in of No. two shuttle valves, and three tunnels are connected with No. three pressure transducers.Number shuttle valve goes out
Hydraulic fluid port is connected with another oil-in of No. two shuttle valves, the oil-out of No. two shuttle valves and the Ioad-sensing control of load sensitive pump
Mouth LS connections.
Further, a liquid energy feedback device includes a constant displacement hydraulic motor, variable pump, a control
Hydraulic cylinder, two-bit triplet pressure reduction control reversal valve, check valve, No. two check valves, a two-bit triplet electromagnetic switch
Valve, No. four 2/2-way solenoid directional control valves；The oil-in of a number constant displacement hydraulic motor is used as a liquid energy feedback device
Oil-in is connected with the oil-out of load sensitive pump, the axle shaft coupling and a variable pump of a constant displacement hydraulic motor
Axle connects, the oil-out of a constant displacement hydraulic motor be divided into all the way, two roads and three tunnels, number check valve of Jing is used as one all the way
One oil-out of number liquid energy feedback system and 2/2-way solenoid directional control valve oil-in together with a proportional reversing valve
Connection, the two 2/2-way solenoid directional control valves of tunnel four as a liquid energy feedback system another oil-out and No. two two two
Electric change valve is connected with the oil-in of No. two proportional reversing valves together, and three tunnels control reversal valve with a two-bit triplet pressure reduction
Connect without spring control mouth；The oil-in of a number variable pump and fuel tank connection；The control-rod and one of a number variable pump
The piston rod connection of number control hydraulic cylinder, the oil-out of a variable pump is connected with the oil-in of No. two check valves；It is described
The oil-out of No. two check valves be divided into all the way, two roads and three tunnels, be connected with the oil-in of a liquid energy feedback device all the way, two tunnels
It is connected with the spring cavity that has of a control hydraulic cylinder, three tunnels are connected with an oil-in of a two-bit triplet pressure reduction control reversal valve
Connect；Described No. one controls being connected without spring cavity and a two-bit triplet pressure reduction control reversal valve oil-out for hydraulic cylinder；Described one
Another oil-in of number two-bit triplet pressure reduction control reversal valve is connected with fuel tank, and a two-bit triplet pressure reduction controls having for reversal valve
Spring control mouth is connected with the oil-out of a two-bit triplet solenoid directional control valve；Two oil-feeds of a number two-bit triplet solenoid directional control valve
Mouth is connected with two oil-ins of a shuttle valve respectively.
Further, No. two liquid energy feedback devices include No. two constant displacement hydraulic motors, No. two variable pumps, No. two controls
Hydraulic cylinder, No. two two-bit triplet pressure reduction control reversal valves, No. three check valves, No. four check valves, No. two two-bit triplet electromagnetic switch
Valve, No. five 2/2-way solenoid directional control valves；The oil-in of No. two constant displacement hydraulic motors is used as No. two liquid energy feedback devices
Oil-in is connected with the oil-out of load sensitive pump, the axle shaft coupling and No. two variable pumps of No. two constant displacement hydraulic motors
Axle connects；The oil-out of No. two constant displacement hydraulic motors be divided into all the way, two roads and three tunnels, No. five check valves of Jing are used as two all the way
One oil-out of number liquid energy feedback system and No. three 2/2-way solenoid directional control valves oil-in together with No. three proportional reversing valves
Connection, the two 2/2-way solenoid directional control valves of tunnel five as No. two liquid energy feedback systems another oil-out and No. two two two
Electric change valve is connected with the oil-in of No. two proportional reversing valves together, and three tunnels control reversal valve with No. two two-bit triplet pressure reduction
Connect without spring control mouth；The piston rod connection of the control-rod of No. two variable pumps and No. two control hydraulic cylinders, described No. two
The oil-in of variable pump and fuel tank connection, the oil-out of No. two variable pumps are connected with the oil-in of No. three check valves；It is described
The oil-out of No. three check valves be divided into all the way, two roads and three tunnels, be connected with the oil-in of No. two liquid energy feedback devices all the way, two tunnels
It is connected with the spring cavity that has of No. two control hydraulic cylinders, three tunnels are connected with an oil-in of No. two two-bit triplet pressure reduction control reversal valves
Connect；Described No. two control being connected without spring cavity and No. two two-bit triplet pressure reduction control reversal valve oil-outs for hydraulic cylinder；Described two
Another oil-in of number two-bit triplet pressure reduction control reversal valve is connected with fuel tank, and No. two two-bit triplet pressure reduction control having for reversal valves
Spring control mouth is connected with the oil-out of No. two two-bit triplet solenoid directional control valves；The one of No. two two-bit triplet solenoid directional control valves
Oil-in is connected with an oil-in of No. two shuttle valves, the oil-in connection of another oil-in and a shuttle valve.
Further, a shuttle valve and No. two shuttle valves, in choosing load, the maximum oil circuit of pressure accesses load-sensitive
The Ioad-sensing control mouth LS of pump, controls the maximum output pressure of load sensitive pump.
A kind of method of work of the electric-controlled hydraulic energy saver for load-sensitive ratio control system, a liquid energy
After the pressure that feedback device and No. two liquid energy feedback devices are reduced to the hydraulic oil that load sensitive pump is exported needed for low-voltage load
Export to low-voltage load, the exit that the pressure that drop is fallen returns to load sensitive pump is used for high-voltage load.
A kind of method of work of the electric-controlled hydraulic energy saver for load-sensitive ratio control system, a liquid energy feedback
The method of work of device, the pressure of the fixed displacement motor output are quick with load by the discharge capacity of a coaxially connected variable pump
The Stress control of sense pump output；The output pressure of load pressure and a fixed displacement motor controls a two-bit triplet pressure reduction control and changes
To the commutation of valve, further control number two-bit triplet pressure reduction control reversal valve of a variable pump Jing and flow into a control hydraulic cylinder
The pressure of the hydraulic oil without spring cavity, the position of a number control piston in hydraulic cylinder of further control, further controls No. one
The size of variable pumpage；When i.e. No. one two-bit triplet electromagnetic switch valve outlet pressure of load pressure is plus the set pressure of spring
Less than a fixed displacement motor output pressure when, the control reversal valve commutation of two-bit triplet pressure reduction, the hydraulic pressure of a variable pump
Oil flows into a control hydraulic cylinder without spring cavity, further moves to right the piston of a control hydraulic cylinder, further to promote
The variable swash plate of a number variable pump increases the discharge capacity of a variable pump, so as to reduce the output pressure of a fixed displacement motor, directly
Output pressure to load pressure plus spring pressure and a fixed displacement motor is equal.The method of work of No. two liquid energy feedback devices,
It is similar to the method for work of a liquid energy feedback device.
Beneficial effect：Advantage of the present invention is as follows：
1st, hydraulic system does not have flow loss, improves efficiency.
2nd, Hydraulic System Fever is little, without the need for cooling system.
3rd, hydraulic system can provide the pressure for matching according to the size of load pressure, improve efficiency.
Description of the drawings
Load-sensitive ratio control energy saver structural representations of the Fig. 1 for multi load；
Load-sensitive ratio control energy saver hydraulic system structure schematic diagrams of the Fig. 2 for multi load.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
The load-sensitive ratio control energy saver of multi load of the present invention is mainly used in the hydraulic system of engineering machinery.Bear more
The load-sensitive ratio control energy saver of load is to judge pressure highest pressure load oil circuit by pressure transducer, control
Solenoid directional control valve commutates, and before liquid energy feedback device is sealed in the restricting element of low tension loop, replaces restricting element to realize blood pressure lowering,
And the exit that the pressure energy that former low tension loop throttling is fallen feeds back to load-sensitive hydraulic pump 1 is used for high-voltage load.
As shown in Figure 1, including 1, liquid energy feedback device 2a of load sensitive pump, No. two liquid energy feedback device 2b, one
Number 2/2-way solenoid directional control valve 10a, No. two 2/2-way solenoid directional control valve 10b, No. three 2/2-way solenoid directional control valve 10c,
Number shuttle valve 9a, No. two shuttle valve 9b, pressure transducer 12a, No. two pressure transducer 12b, No. three pressure transducer 12c,
Number proportional reversing valve 13a, No. two proportional reversing valve 13b, No. three proportional reversing valve 13c, motor load device 3a, an oil cylinders
Load device 3b, No. two oil cylinder load device 3c, relief valve 14 and fuel tanks 15.A number shuttle valve 9a and No. two shuttle valve 9b select load
The maximum oil circuit of pressure, and the Ioad-sensing control mouth LS of load sensitive pump 1 is enabled its flow into, realize that responsive to load pump 1 is exported
The control of pressure.Number pressure transducer 12a, No. two pressure transducer 12b, a No. three pressure transducer 12c judge pressure most
High load oil circuit, then controls 2/2-way solenoid directional control valve 10a, a No. two 2/2-way solenoid directional control valve 10b or three
Number 2/2-way solenoid directional control valve 10c actions, are sealed in a liquid energy feedback device 2a, No. two liquid energy feedback device 2b low respectively
Pressure load place loop, is conveyed to low-voltage load use, and former low pressure is returned after the hydraulic oil blood pressure lowering exported by load sensitive pump 1
The pressure energy that road drop is fallen feeds back to the exit of load-sensitive hydraulic pump 1 and uses for high-voltage load.
As shown in Figure 2, the liquid energy feedback device 2a includes a constant displacement hydraulic motor 4a, a variable pump
5a, a control hydraulic cylinder 6a, two-bit triplet pressure reduction control reversal valve 7a, check valve 8a, No. two check valve 8b, one
Number two-bit triplet solenoid directional control valve 11a, No. four 2/2-way solenoid directional control valve 10d；A number constant displacement hydraulic motor 4a's enters
Hydraulic fluid port is connected with the oil-out of load sensitive pump 1 as the oil-in of a liquid energy feedback device 2a, a quantitative hydraulic
The axle shaft coupling of motor 4a is connected with the axle of a variable pump 5a, and the oil-out of a constant displacement hydraulic motor 4a is divided into one
Road, two roads and three tunnels, all the way number check valve 8a of Jing as a liquid energy feedback system 2a an oil-out and No. one two two
Electric change valve 10a is connected with the oil-in of a proportional reversing valve 13a together, the two 2/2-way electromagnetic switch of tunnel four
Valve 10d as a liquid energy feedback system 2a another oil-out and No. two 2/2-way solenoid directional control valve 10b together with No. two
The oil-in connection of proportional reversing valve 13b, three tunnels are connected without spring control mouth with a two-bit triplet pressure reduction control reversal valve 7a；
The oil-in of a number variable pump 5a is connected with fuel tank 17；The control-rod of a number variable pump 5a and a control hydraulic cylinder
The piston rod connection of 6a, the oil-out of a variable pump 5a are connected with the oil-in of No. two check valve 8b；No. two lists
To the oil-out of valve 8b be divided into all the way, two roads and three tunnels, be connected with the oil-in of a liquid energy feedback device 2a all the way, two tunnels with
The spring cavity that has of a number control hydraulic cylinder 6a connects, and three tunnels are connected with an oil-in of a two-bit triplet pressure reduction control reversal valve 7a
Connect；Number control hydraulic cylinder 6a's is connected with a two-bit triplet pressure reduction control reversal valve 7a oil-out without spring cavity；Institute
Another oil-in for stating a two-bit triplet pressure reduction control reversal valve 7a is connected with fuel tank 17, and a two-bit triplet pressure reduction control is changed
It is connected to have spring control mouth and the oil-out of a two-bit triplet solenoid directional control valve 11a of valve 7a；A number two-bit triplet electromagnetism
Two oil-ins of reversal valve 11a are connected with two oil-ins of a shuttle valve 9a respectively.No. two liquid energies feedback device 2b includes
No. two constant displacement hydraulic motor 4b, No. two variable pump 5b, No. two control hydraulic cylinder 6b, No. two two-bit triplet pressure reduction control reversal valve
7b, No. three check valve 8c, No. four check valve 8d, No. two two-bit triplet solenoid directional control valve 11b, No. five 2/2-way solenoid directional control valves
10e；Oil-in and load sensitive pump 1 of the oil-in of No. two constant displacement hydraulic motor 4b as No. two liquid energy feedback device 2b
Oil-out connection, the axle shaft coupling of No. two constant displacement hydraulic motor 4b is connected with the axle of No. two variable pump 5b；Described two
The oil-out of number constant displacement hydraulic motor 4b be divided into all the way, two roads and three tunnels, all the way No. five check valve 8e of Jing return as No. two liquid energies
One oil-out of feedback system 2b and No. three 2/2-way solenoid directional control valve 10c oil-in together with No. three proportional reversing valve 13c
Connection, the two 2/2-way solenoid directional control valve 10e of tunnel five as No. two liquid energy feedback system 2b another oil-out and No. two
2/2-way solenoid directional control valve 10b is connected with the oil-in of No. two proportional reversing valve 13b together, three tunnels and No. two two-bit triplet pressures
Difference control reversal valve 7b connects without spring control mouth；The work of the control-rod of No. two variable pump 5b and No. two control hydraulic cylinder 6b
Stopper rod connects, and the oil-in of No. two variable pump 5b is connected with fuel tank 17, the oil-out of No. two variable pump 5b and No. three
The oil-in connection of check valve 8c；The oil-out of No. three check valve 8c be divided into all the way, two roads and three tunnels, all the way with No. two liquid
Can feedback device 2b oil-in connection, two tunnels are connected with the spring cavitys that have of No. two control hydraulic cylinder 6b, three tunnels and No. two two
The one oil-in connection of threeway pressure reduction control reversal valve 7b；No. two control hydraulic cylinder 6b without spring cavity and No. two two three
Logical pressure reduction control reversal valve 7b oil-out connections；Another oil-in and oil of No. two two-bit triplet pressure reduction control reversal valve 7b
Case 17 connects, and No. two two-bit triplet pressure reduction control reversal valve 7b's has spring control mouth and No. two two-bit triplet solenoid directional control valves
The oil-out connection of 11b；One oil-in of one oil-in and No. two shuttle valve 9b of No. two two-bit triplets solenoid directional control valve 11b
The one oil-in connection of connection, another oil-in and a shuttle valve 9a.
Method of work of the present invention, comprises the following steps that：
The load pressure port place oil circuit of a number shuttle valve 9a and No. two shuttle valve 9b selection pressures maximums simultaneously enables its flow into load
The Ioad-sensing control mouth LS of sensitive pump 1, realizes the control of 1 output pressure of responsive to load pump.Number pressure transducer 12a,
No. two pressure transducer 12b, No. three pressure transducer 12c judge each load oil circuit pressure, then control solenoid directional control valve commutation,
Two load circuits for making load pressure relatively low seal in a liquid energy feedback device 2a and No. two liquid energy feedback device 2b respectively.
1) motor load device 3a needs pressure highest.
A number 2/2-way solenoid directional control valve 10a does not commutate；The commutation control motor load dress of a number proportional reversing valve 13a
Put the rotating of 3a.Number 2/2-way solenoid directional control valve 10a of hydraulic oil Jing and a ratio commutation that load sensitive pump 1 flows out
Valve 13a flows into motor load device 3a.
A number two-bit triplet solenoid directional control valve 11a does not commutate；No. two 2/2-way electromagnetic switch 10b and No. four 2/2-ways
Solenoid directional control valve 10d commutates；Piston rod in number oil cylinder load device 3b of commutation control of No. two proportional reversing valve 13b stretches out
And withdrawal.The hydraulic oil that load sensitive pump 1 flows out is flowed in a constant displacement hydraulic motor 4a of a liquid energy feedback device 2a, and one
Number constant displacement hydraulic motor 4a drives a variable pump 5a to rotate and realizes blood pressure lowering, the hydraulic pressure Jing after a constant displacement hydraulic motor 4a blood pressure lowering
No. tetra- 2/2-way solenoid directional control valve 10d of oily Jing and No. two proportional reversing valve 13b flow into an oil cylinder load device 3b.No. two ratios
Number two-bit triplet solenoid directional control valve 11a of hydraulic oil Jing at example reversal valve 13b load pressure ports flows into a two-bit triplet pressure
Difference control reversal valve 7a's has spring control, the section hydraulic oil number two-bit triplet pressure reduction of inflow that a fixed displacement motor 4a flows out
The control commutated to a two-bit triplet pressure reduction control reversal valve 7a without spring control mouth, realization of control reversal valve 7a, enters one
Step is realized flowing into a variable pump 5a a number control controls of the hydraulic cylinder 6a without spring cavity fluid, further realizes controlling No. one
The control of hydraulic cylinder 6a piston positions processed, further realizes the control to a variable pump 5a discharge capacity, fixed to No. one so as to realize
The control of amount motor 4a output pressures.No. bis- check valve 8b of hydraulic oil Jing of a number variable pump 5a outflow flow back to load-reacting
The exit of pump 1 is practical for high-voltage load.
No. five 2/2-way solenoid directional control valve 10e and No. two two-bit triplet solenoid directional control valve 11b do not commutate；No. three two two
Electric change valve 10c commutates；Piston rod in No. two oil cylinder load device 3c of commutation control of No. three proportional reversing valve 13c is stretched
Go out and withdraw.The hydraulic oil that load sensitive pump 1 flows out is flowed in No. two constant displacement hydraulic motor 4b of No. two liquid energy feedback device 2b,
No. two constant displacement hydraulic motor 4b drive No. two variable pump 5b to rotate and realize blood pressure lowering, the liquid Jing after No. two constant displacement hydraulic motor 4b blood pressure lowerings
Force feed No. tetra- check valve 8d of Jing and No. three proportional reversing valve 13c flow into No. two oil cylinder load device 3c.No. three proportional reversing valve 13c
No. bis- two-bit triplet solenoid directional control valve 11b of hydraulic oil Jing at load pressure port flow into No. two two-bit triplet pressure reduction and control reversal valve
7b's has spring control, and No. two fixed displacement motor 4b flow out part hydraulic oil and flow into No. two two-bit triplet pressure reduction control reversal valve 7b's
Without spring control mouth, the control to No. two two-bit triplet pressure reduction control reversal valve 7b commutations is realized, further realizes becoming No. two
Amount pump 5b flows into No. two control controls of the hydraulic cylinder 6b without spring cavity fluid, further realizes to No. two control hydraulic cylinder 6b pistons
The control of position, further realizes the control to No. two variable pump 5b discharge capacities, so as to realize to No. two dosing pump 4b output pressures
Control.No. tri- check valve 8c of hydraulic oil Jing of No. two variable pump 5b outflows flow back to the exit of load-reacting pump 1 for high
Pressure load is practical.
2) an oil cylinder load device needs pressure highest.
No. four 2/2-way solenoid directional control valve 10d do not commutate；No. one 2/2-way solenoid directional control valve 10a and No. one two three
Electric change valve 11a commutates；The rotating of the commutation control motor load device 3a of a number proportional reversing valve 13a.Load is quick
The hydraulic oil that sense pump 1 flows out is flowed in a constant displacement hydraulic motor 4a of a liquid energy feedback device 2a, a quantitative hydraulic horse
Drive a variable pump 5a to rotate up to 4a and realize blood pressure lowering, the hydraulic oil Jing Jing after a constant displacement hydraulic motor 4a blood pressure lowering mono- is unidirectional
Valve 8a and a proportional reversing valve 13a flow into motor load device 3a.Hydraulic pressure at a number proportional reversing valve 13a load pressure port
What number two-bit triplet solenoid directional control valve 11a of oily Jing flowed into a two-bit triplet pressure reduction control reversal valve 7a has spring control, and one
Number fixed displacement motor 4a flow out part hydraulic oil flow into a two-bit triplet pressure reduction control reversal valve 7a without spring control mouth, realize
Control to a two-bit triplet pressure reduction control reversal valve 7a commutation, further realizes flowing into a variable pump 5a a number control
Controls of the hydraulic cylinder 6a without spring cavity fluid, further realizes the control to a control hydraulic cylinder 6a piston position, further
The control to a variable pump 5a discharge capacity is realized, so as to realize the control to a constant displacement hydraulic motor 4a output pressure.No. one
The exit that No. bis- check valve 8b of hydraulic oil Jing that variable pump 5a flows out flow back to load-reacting pump 1 is practical for high-voltage load.
No. two 2/2-way reversal valve 10b do not commutate；Number oil cylinder load dress of commutation control of No. two proportional reversing valve 13b
Put the piston rod in 3b to stretch out and withdraw.Load sensitive pump 1 flow out No. bis- 2/2-way solenoid directional control valve 10b of hydraulic oil Jing and
No. two proportional reversing valve 13b flow into a cylinder apparatus 3b.
No. five 2/2-way solenoid directional control valve 10e and No. two two-bit triplet solenoid directional control valve 11b do not commutate；No. three two two
Electric change valve 10c commutates；Piston rod in No. two oil cylinder load device 3c of commutation control of No. three proportional reversing valve 13c is stretched
Go out and withdraw.The hydraulic oil that load sensitive pump 1 flows out is flowed in No. two constant displacement hydraulic motor 4b of No. two liquid energy feedback device 2b,
No. two constant displacement hydraulic motor 4b drive No. two variable pump 5b to rotate and realize blood pressure lowering, the liquid Jing after No. two constant displacement hydraulic motor 4b blood pressure lowerings
Force feed No. tetra- check valve 8d of Jing and No. three proportional reversing valve 13c flow into No. two oil cylinder load device 3c.No. three proportional reversing valve 13c
No. bis- two-bit triplet solenoid directional control valve 11b of hydraulic oil Jing at load pressure port flow into No. two two-bit triplet pressure reduction and control reversal valve
7b's has spring control, and No. two fixed displacement motor 4b flow out part hydraulic oil and flow into No. two two-bit triplet pressure reduction control reversal valve 7b's
Without spring control mouth, the control to No. two two-bit triplet pressure reduction control reversal valve 7b commutations is realized, further realizes becoming No. two
Amount pump 5b flows into No. two control controls of the hydraulic cylinder 6b without spring cavity fluid, further realizes to No. two control hydraulic cylinder 6b pistons
The control of position, further realizes the control to No. two variable pump 5b discharge capacities, defeated to No. two constant displacement hydraulic motor 4b so as to realize
Go out the control of pressure.No. tri- check valve 8c of hydraulic oil Jing of No. two variable pump 5b outflows flow back to the outlet of load-reacting pump 1
Place is practical for high-voltage load.
3) No. two oil cylinder load devices need pressure highest.
No. four 2/2-way solenoid directional control valve 10d do not commutate；No. one 2/2-way solenoid directional control valve 10a and No. one two three
Electric change valve 11a commutates；The rotating of a number proportional reversing valve 13a commutation control motor load device 3a.Load-sensitive
The hydraulic oil that pump 1 flows out is flowed in a constant displacement hydraulic motor 4a of a liquid energy feedback device 2a, a constant displacement hydraulic motor
4a drives a variable pump 5a to rotate and realizes blood pressure lowering, number check valve of the hydraulic oil Jing Jing after a constant displacement hydraulic motor 4a blood pressure lowering
8a and proportional reversing valve 13a flows into motor load device 3a.Hydraulic oil at a number proportional reversing valve 13a load pressure port
What number two-bit triplet solenoid directional control valve 11a of Jing flowed into a two-bit triplet pressure reduction control reversal valve 7a has spring control, No. one
Fixed displacement motor 4a flow out part hydraulic oil flow into two-bit triplet pressure reduction control reversal valve 7a without spring control mouth, it is right to realize
The control of a number two-bit triplet pressure reduction control reversal valve 7a commutation, further realizes flowing into a variable pump 5a a number control liquid
Controls of the cylinder pressure 6a without spring cavity fluid, further realizes the control to a control hydraulic cylinder 6a piston position, further real
The now control to a variable pump 5a discharge capacity, so as to realize the control to a dosing pump 4a output pressure.A number variable pump 5a
The exit that No. bis- check valve 8b of hydraulic oil Jing of outflow flow back to load-reacting pump 1 is practical for high-voltage load.
No. two 2/2-way solenoid directional control valve 10b, No. five 2/2-way solenoid directional control valve 10e and No. two two-bit triplet electromagnetism
Reversal valve 11b commutates；Piston rod in number oil cylinder load device 3b of commutation control of No. two proportional reversing valve 13b stretches out and receives
Return.The hydraulic oil that load sensitive pump 1 flows out is flowed in No. two constant displacement hydraulic motor 4b of No. two liquid energy feedback device 2b, and No. two fixed
Amount hydraulic motor 4b drives No. two variable pump 5b to rotate and realizes blood pressure lowering, the hydraulic oil Jing Jing after No. two constant displacement hydraulic motor 4b blood pressure lowerings
No. five 2/2-way solenoid directional control valve 10e and No. two proportional reversing valve 13b flow into an oil cylinder load device 3b.No. two ratios are changed
No. two two-bit triplet pressure reduction controls are flowed into No. bis- two-bit triplet solenoid directional control valve 11b of hydraulic oil Jing at valve 13b load pressure ports
Reversal valve 7b's processed has spring control, and No. two constant displacement hydraulic motor 4b flow out part hydraulic oil and flow into No. two two-bit triplet pressure reduction controls
The control No. two two-bit triplet pressure reduction control reversal valve 7b commutated without spring control mouth, realization of reversal valve 7b processed, further
Realize flowing into No. two variable pump 5b No. two control controls of the hydraulic cylinder 6b without spring cavity fluid, further realize controlling No. two
The control of hydraulic cylinder 6b piston positions, further realizes the control to No. two variable pump 5b discharge capacities, quantitative to No. two so as to realize
The control of pump 4b output pressures.No. tri- check valve 8c of hydraulic oil Jing of No. two variable pump 5b outflows flow back to load-reacting pump 1
Exit it is practical for high-voltage load.
No. three 2/2-way reversal valve 10c do not commutate；No. two oil cylinder load dresses of commutation control of No. three proportional reversing valve 13c
Put the piston rod in 3c to stretch out and withdraw.Load sensitive pump 1 flow out No. tri- 2/2-way solenoid directional control valve 10c of hydraulic oil Jing and
No. three proportional reversing valve 13c flow into No. two cylinder apparatus 3c.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1. a kind of electric-controlled hydraulic energy saver for load-sensitive ratio control system, it is characterised in that：Including load-sensitive
Pump (1), liquid energy feedback device (2a), No. two liquid energy feedback devices (2b), 2/2-way solenoid directional control valve (10a),
No. two 2/2-way solenoid directional control valves (10b), No. three 2/2-way solenoid directional control valves (10c), shuttle valve (9a), No. two shuttle valves
(9b), pressure transducer (12a), No. two pressure transducers (12b), No. three pressure transducers (12c), a ratio commutations
Valve (13a), No. two proportional reversing valves (13b), No. three proportional reversing valves (13c), motor load device (3a), an oil cylinder loads
Device (3b), No. two oil cylinder load devices (3c), relief valve (14) and fuel tanks (15)；Load sensitive pump (1) oil-out point
For the first via, the second tunnel, the 3rd tunnel, the 4th tunnel, the 5th road and the 6th tunnel, number 2/2-way solenoid directional control valve of first via Jing
(10a) it is connected with an oil-in of a proportional reversing valve (13a), the second 2/2-way solenoid directional control valve of tunnel two (10b)
Be connected with an oil-in of No. two proportional reversing valves (13b), the 3rd 2/2-way solenoid directional control valve of tunnel three (10c) with No. three
The one oil-in connection of proportional reversing valve (13c), the 4th tunnel are connected with the oil-in of a liquid energy feedback device (2a), the 5th tunnel
It is connected with the oil-in of No. two liquid energy feedback devices (2b), the 6th tunnel is connected with the oil-in of relief valve (16)；The relief valve
(16) oil-out is connected with fuel tank (17)；The oil-in of the load sensitive pump (1) is connected with fuel tank (17)；
The oil-out of a number liquid energy feedback device (2a) is divided into the first via and the second tunnel, the first via and a 2/2-way electricity
The oil-out of magnetic reversal valve (10a) is connected with proportional reversing valve (13a) oil-in together, the second road and No. two two two
The oil-out of electric change valve (10b) is connected with an oil-in of No. two proportional reversing valves (13b) together；
The oil-out of No. two liquid energy feedback devices (2b) is divided into the first via and the second tunnel, the first via and No. two 2/2-way electricity
The oil-out of magnetic reversal valve (10b) is connected with an oil-in of No. two proportional reversing valves (13b) together, the second road and No. three two
The oil-out of two electric change valves (10c) is connected with an oil-in of No. three proportional reversing valves (13c) together；
Two oil-outs of a number proportional reversing valve (13a) are connected with motor load device (3a)；Number ratio commutation
The load pressure port of valve (13a) is divided into the first via, the second road and the 3rd tunnel, and the first via is with a liquid energy feedback device (2a) even
Connect, the second tunnel is connected with an oil-in of a shuttle valve (9a), the 3rd tunnel is connected with a pressure transducer (12a)；Described two
Two oil-outs of number proportional reversing valve (13b) are connected with an oil cylinder load device (3b), No. two proportional reversing valves (13b)
Load pressure port be divided into the first via, the second tunnel, the 3rd road and the 4th tunnel, the first via is with No. two liquid energy feedback devices (2b) even
Connect, the second tunnel is connected with another oil-in of a shuttle valve (9a), the 3rd tunnel is connected with a liquid energy feedback device (2a), the 4th
Road is connected with No. two pressure transducers (12b)；Two oil-outs of No. three proportional reversing valves (13c) and No. two oil cylinder load dresses
(3c) connection is put, No. three proportional reversing valves (13c) load pressure port is divided into the first via, the second road and the 3rd tunnel, the first via
It is connected with No. two liquid energy feedback devices (2b), the second tunnel is connected with an oil-in of No. two shuttle valves (9b), the 3rd tunnel is pressed with No. three
Force transducer (12c) connects；
The oil-out of a number shuttle valve (9a) is connected with another oil-in of No. two shuttle valves (9b), No. two shuttle valves (9b)
Oil-out is connected with the Ioad-sensing control mouth LS of load sensitive pump (1)；
A number liquid energy feedback device (2a) includes a constant displacement hydraulic motor (4a), variable pump (5a), a control
Hydraulic cylinder (6a), two-bit triplet pressure reduction control reversal valve (7a), check valve (8a), No. two check valves (8b), No. one
Two-bit triplet solenoid directional control valve (11a), No. four 2/2-way solenoid directional control valves (10d)；A number constant displacement hydraulic motor (4a)
Oil-in be connected with the oil-out of load sensitive pump (1) as the oil-in of a liquid energy feedback device (2a), described No. one
The axle shaft coupling of constant displacement hydraulic motor (4a) is connected with the axle of a variable pump (5a), a constant displacement hydraulic motor (4a)
Oil-out be divided into the first via, the second road and the 3rd tunnel, number check valve (8a) of first via Jing is used as a liquid energy feedback system
(2a) a oil-out and 2/2-way solenoid directional control valve (10a) oil-in together with a proportional reversing valve (13a)
Connection, another oil-out of the second 2/2-way solenoid directional control valve of the tunnel four (10d) as a liquid energy feedback system (2a)
It is connected with the oil-in of No. two proportional reversing valves (13b) with No. two 2/2-way solenoid directional control valves (10b) together, the 3rd tunnel and
Number two-bit triplet pressure reduction control reversal valve (7a) connects without spring control mouth；The oil-in and fuel tank of a number variable pump (5a)
(17) connect；The piston rod connection of the control-rod of a number variable pump (5a) and control hydraulic cylinder (6a), described No. one
The oil-out of variable pump (5a) is connected with the oil-in of No. two check valves (8b)；The oil-out of No. two check valves (8b) is divided into
The first via, the second road and the 3rd tunnel, the first via are connected with the oil-in of a liquid energy feedback device (2a), and the second tunnel is controlled with No. one
The spring cavity that has of hydraulic cylinder (6a) processed connects, and the 3rd tunnel is connected with an oil-in of two-bit triplet pressure reduction control reversal valve (7a)
Connect；Described No. one controls connecting without spring cavity and two-bit triplet pressure reduction control reversal valve (7a) oil-out for hydraulic cylinder (6a)
Connect；Another oil-in of number two-bit triplet pressure reduction control reversal valve (7a) is connected with fuel tank (17), a two-bit triplet
Have spring control mouth and the oil-out of a two-bit triplet solenoid directional control valve (11a) of pressure reduction control reversal valve (7a) is connected；One
Two oil-ins of number two-bit triplet solenoid directional control valve (11a) are connected with two oil-ins of a shuttle valve (9a) respectively；
No. two liquid energy feedback devices (2b) include No. two constant displacement hydraulic motors (4b), No. two variable pumps (5b), No. two controls
Hydraulic cylinder (6b), No. two two-bit triplet pressure reduction control reversal valve (7b), No. three check valves (8c), No. four check valves (8d), No. two
Two-bit triplet solenoid directional control valve (11b), No. five 2/2-way solenoid directional control valves (10e)；No. two constant displacement hydraulic motors (4b)
Oil-in be connected with the oil-out of load sensitive pump (1) as the oil-in of No. two liquid energy feedback devices (2b), described No. two
The axle shaft coupling of constant displacement hydraulic motor (4b) is connected with the axle of No. two variable pumps (5b)；No. two constant displacement hydraulic motors (4b)
Oil-out be divided into the first via, the second road and the 3rd tunnel, No. tetra- check valves (8d) of first via Jing are used as No. two liquid energy feedback systems
(2b) a oil-out and No. three 2/2-way solenoid directional control valves (10c) oil-in together with No. three proportional reversing valves (13c)
Connection, another oil-out of the second 2/2-way solenoid directional control valve of the tunnel five (10e) as No. two liquid energy feedback systems (2b)
It is connected with the oil-in of No. two proportional reversing valves (13b) with No. two 2/2-way solenoid directional control valves (10b) together, the 3rd tunnel and two
Number two-bit triplet pressure reduction control reversal valve (7b) connects without spring control mouth；The control-rod of No. two variable pumps (5b) and No. two
The piston rod connection of control hydraulic cylinder (6b), the oil-in of No. two variable pumps (5b) and fuel tank (17) connection, described No. two
The oil-out of variable pump (5b) is connected with the oil-in of No. three check valves (8c)；The oil-out of No. three check valves (8c) is divided into
The first via, the second road and the 3rd tunnel, the first via are connected with the oil-in of No. two liquid energy feedback devices (2a), and the second tunnel is controlled with No. two
The spring cavity that has of hydraulic cylinder (6b) processed connects, and the 3rd tunnel is connected with an oil-in of No. two two-bit triplet pressure reduction control reversal valve (7b)
Connect；Described No. two control connecting without spring cavity and No. two two-bit triplet pressure reduction control reversal valve (7b) oil-outs for hydraulic cylinder (6b)
Connect；Another oil-in of No. two two-bit triplet pressure reduction control reversal valve (7b) is connected with fuel tank (17), No. two two-bit triplets
Have spring control mouth and the oil-out of No. two two-bit triplet solenoid directional control valves (11b) of pressure reduction control reversal valve (7b) is connected；Institute
The oil-in for stating No. two two-bit triplet solenoid directional control valves (11b) is connected with an oil-in of No. two shuttle valves (9b), another oil-feed
One oil-in of mouth and a shuttle valve (9a) connects.
2. a kind of work side of the electric-controlled hydraulic energy saver for load-sensitive ratio control system according to claim 1
Method, it is characterised in that：A number shuttle valve (9a) and No. two shuttle valves (9b), in choosing load, the maximum oil circuit of pressure accesses load
The Ioad-sensing control mouth LS of sensitive pump (1), controls the maximum output pressure of load sensitive pump (1)；
The hydraulic oil that a number liquid energy feedback device (2a) and No. two liquid energy feedback devices (2b) export load sensitive pump (1)
Export after being reduced to the pressure needed for low-voltage load to low-voltage load, the pressure that drop is fallen is returned to going out for load sensitive pump (1)
Use for high-voltage load at mouthful；
Discharge capacity and load-sensitive of the pressure that a number fixed displacement motor (4a) exports by a coaxially connected variable pump (5a)
The Stress control that pump (1) is exported；The output pressure of load pressure and a fixed displacement motor (4a) controls a two-bit triplet pressure reduction
The commutation of control reversal valve (7a), further controls number two-bit triplet pressure reduction control reversal valve (7a) of variable pump (5a) Jing
The pressure of the control hydraulic oil of (6a) without spring cavity hydraulic cylinder is flowed into, in number control hydraulic cylinder (6a) of further control
The position of piston, further controls the discharge capacity of a variable pump (5a)；When load pressure is a two-bit triplet solenoid directional control valve
(11a) outlet pressure plus spring set pressure less than a fixed displacement motor output pressure when, a two-bit triplet pressure reduction
Control reversal valve (7a) commutation, the hydraulic oil of a variable pump (5a) flow into control hydraulic cylinder (6a) without spring cavity, enter one
The piston for making control hydraulic cylinder (6a) of step is moved to right, and further promotes the variable swash plate of a variable pump (5a) to make No. one
The discharge capacity increase of variable pump (5a), so as to reduce the output pressure of a fixed displacement motor (4a), until load pressure adds spring pressure
The output pressure of power and a fixed displacement motor (4a) is equal；
The method of work of No. two liquid energy feedback devices (2b), the method for work phase with a liquid energy feedback device (2a)
Together.
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| JP2006336844A (en) * | 2005-06-06 | 2006-12-14 | Shin Caterpillar Mitsubishi Ltd | Working machine |
| DE102013101107A1 (en) * | 2013-02-05 | 2014-08-07 | Karlsruher Institut für Technologie | Hydraulic multi-user system with energy-efficient hydraulic circuit |
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| CN101408213A (en) * | 2008-11-11 | 2009-04-15 | 浙江大学 | Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor |
| CN101576107A (en) * | 2009-06-01 | 2009-11-11 | 浙江大学 | Energy recovery device in shield duct piece assembling driving system |
| CN102619818A (en) * | 2011-01-31 | 2012-08-01 | 波克兰液压工业设备公司 | Hydraulic transmission device allowing the recovery of energy |
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