CN107327426B - A kind of force control hydraulic pressure energy saving of system method and its energy saver - Google Patents

A kind of force control hydraulic pressure energy saving of system method and its energy saver Download PDF

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Publication number
CN107327426B
CN107327426B CN201710742313.8A CN201710742313A CN107327426B CN 107327426 B CN107327426 B CN 107327426B CN 201710742313 A CN201710742313 A CN 201710742313A CN 107327426 B CN107327426 B CN 107327426B
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CN
China
Prior art keywords
pressure
values
variable pump
valve
control valve
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Expired - Fee Related
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CN201710742313.8A
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Chinese (zh)
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CN107327426A (en
Inventor
邓贲
杨贝贝
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Foshan City Rui Buddha Electromechanical Technology Co Ltd
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Foshan City Rui Buddha Electromechanical Technology Co Ltd
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Publication of CN107327426A publication Critical patent/CN107327426A/en
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Publication of CN107327426B publication Critical patent/CN107327426B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/0275—Installations or systems with accumulators having accumulator charging devices with two or more pilot valves, e.g. for independent setting of the cut-in and cut-out pressures
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • F15B21/087—Control strategy, e.g. with block diagram
    • 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
    • F15B9/03—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 with electrical control 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
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Abstract

The present invention provides a kind of force control hydraulic pressure energy saving of system device, including variable pump, fuel tank, the accumulator communicated with the variable pump oil outlet and the check valve being set between the accumulator and variable pump, the variable pump controls its discharge capacity by a variable oil cylinder, the rodless cavity of the variable oil cylinder is connected to fuel tank by the first damping hole, it is characterised in that：Further include an Energy Saving Control valve group, the Energy Saving Control valve group passes through the oil communication between pressure signal oil pipe and accumulator and check valve；Accumulator inlet pressure signals are passed to Energy Saving Control valve group by this programme by pressure signal oil pipe so that when upper limit value of the inlet pressure of accumulator higher than the setting of Energy Saving Control valve group, variable pump is in low pressure small displacement standby mode；When lower limiting value of the inlet pressure of accumulator less than the setting of Energy Saving Control valve group, variable pump restores huge discharge and supplements fluid to system again, and whole process can reduce energy consumption, keep system work more stable.

Description

A kind of force control hydraulic pressure energy saving of system method and its energy saver
Technical field
The present invention relates to technical field of hydraulic more particularly to a kind of force control hydraulic pressure energy saving of system method and its Energy saver.
Background technology
Shown in attached drawing 1, existing common force control hydraulic pressure system its it is general include variable pump 1e, variable oil cylinder 2e, check valve 3e, accumulator 4e, the first damping hole 5e, fuel tank 6e, the second damping hole 7e, pressure valve 8e and overflow valve 9e, variable It pumps when 1e starts to accumulator 4e feed flows, when the outlet pressure of variable pump 1e reaches pressure valve 8e spring pressures setting value and overflow When the sum of the setup pressure value of valve 9e, the left station work of pressure valve 8e, the outlets variable pump 1e fluid is connected by pressure valve 8e Passing to variable oil cylinder 2e rodless cavities makes variable pump 1e discharge capacities reduce, and variable pump 1e is in high-pressure small-displacement standby mode at this time, Its problem of being primarily present of above-mentioned force control hydraulic pressure system：Its outlet is constantly in high pressure conditions when variable pump standby mode, Waste energy.In view of this, for how to search out the pressure control skill that a kind of low pressure is standby and makes system work more stable Art means are just particularly important.
Invention content
In view of the deficiencies of the prior art, the present invention is intended to provide a kind of pressure reducing energy consumption and make system work more stable Power controls hydraulic system power-economizing method.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of force control hydraulic pressure energy saving of system method, It is characterized in that：Accumulator inlet pressure signals are passed to Energy Saving Control valve group, the Energy Saving Control valve group by pressure signal oil pipe Middle setting pressure P1, P2, P3 value, P1 >=P2>P3 >=0, when the inlet pressure of accumulator is higher than P1 values, the Energy Saving Control valve group Work is so that variable pump reduces discharge capacity and outlet pressure is down to P3 values, and variable pump is in low pressure small displacement standby mode at this time, together When closed check valve, variable pump discharge and accumulator entrance are in partition state；When the inlet pressure of accumulator is less than P2 values, The Energy Saving Control valve group works so that the discharge capacity of variable pump increases, and variable pump restores to system feed flow, whole process so recycles, Adjust automatically, this method make variable pump be in low pressure small displacement state when standby, and whole process, which can reduce energy consumption, make, is Work of uniting is more stable.
Further, the present invention also provides a kind of a kind of force control hydraulic pressure energy saving of system methods realized as described in power 1 Force control hydraulic pressure energy saving of system device, including variable pump, the variable oil cylinder, fuel-displaced with the variable pump that is connect with the variable pump The mouth accumulator communicated and the check valve being set between the accumulator and variable pump, the variable oil cylinder rodless cavity pass through First damping hole is connected to fuel tank, and the variable pump oil outlet is connected to variable cylinder rod chamber and Energy Saving Control valve group respectively, The Energy Saving Control valve group is also connected to fuel tank, variable oil cylinder rodless cavity and accumulator entrance respectively, it is characterised in that：Including One Energy Saving Control valve group, and connect the pressure signal oil pipe of the Energy Saving Control valve group and accumulator entrance.
Preferably, the Energy Saving Control valve group includes pressure valve, pilot operated directional control valve, the second damping hole, proportional pressure valve, pressure The collected variable pump outlet pressure signal is passed to the control by force snesor and controller, the pressure sensor Device, the controller send out instruction and can adjust it to the proportional pressure valve and set pressure as P5 values or P6 values, the hydraulic control The spring pressure P4 values of reversal valve setting and the sum of the pressure P5 values of proportional pressure valve setting are set as P1 values, and the hydraulic control is changed The spring pressure P4 values set to valve are set as P2 values with the sum of the pressure P6 values that the proportional pressure valve is set, and the pressure valve is set Fixed spring pressure is P3 values, and when the variable pump startup, the pressure valve and the pilot operated directional control valve are right working position work, The variable pump huge discharge is exported to be energized to the accumulator, when the variable pump discharge pressure is more than P3 values, the pressure The left station work of valve, when the accumulator inlet pressure is more than P1 values, the left station work of pilot operated directional control valve, the variable Pump discharge high-voltage oil liquid is connected to the variable oil cylinder rodless cavity and the variable pumpage is reduced, and the check valve closes It closes, variable pump discharge pressure reduction, which causes the controller to send instructions to the proportional pressure valve, makes its pressure value be P6, the variable pump discharge pressure continue to drop to P3 values, and the variable pump is in low pressure small displacement standby mode at this time；Work as institute When stating accumulator inlet pressure less than P2 values, the pilot operated directional control valve right working position work, the variable oil cylinder rodless cavity is connected to institute Fuel tank is stated, the variable pumpage increases, and it is described that the variable pump discharge pressure increase causes the controller to send instructions to Proportional pressure valve makes its pressure value be P5, when the accumulator inlet pressure is more than P1 values again, whole process recycles successively, Adjust automatically.
Preferably, the Energy Saving Control valve group includes pressure valve, the first pilot operated directional control valve, the second pilot operated directional control valve, first Precursor overflow valve, the second precursor overflow valve, the second damping hole, third damping hole, the 4th damping hole, first pilot operated directional control valve The spring pressure P4 values of setting and the sum of the pressure P5 values of first precursor overflow valve setting are set as P1 values, first hydraulic control The spring pressure P4 values of reversal valve setting and the sum of the pressure P6 values of the second precursor overflow valve setting are set as P2 values, the pressure valve The spring pressure set is P3 value, and the variable pump huge discharge is exported and energized to the accumulator, described second when just starting Station works under pilot operated directional control valve, the first pilot operated directional control valve right working position work so that the liquid at pressure valve core both ends Pressure is equal, under the promotion of its right end spring force, the pressure valve right working position work, until the accumulator inlet pressure is big When P1 values, the left station work of the first pilot operated directional control valve, the left station work of pressure valve, the variable pump discharge high pressure Fluid is connected to the variable oil cylinder rodless cavity and the variable pumpage is reduced, the closed check valve, the variable The outlet pressure decline of pump causes station on second pilot operated directional control valve to work, and the variable pump discharge pressure continues to drop to P3 values, at this time the variable pump be in low pressure small displacement standby mode；It is described when the accumulator inlet pressure is less than P2 values First pilot operated directional control valve and the pressure valve are in right working position work, and the variable pumpage increases to be energized to accumulator, the Station works under two pilot operated directional control valves, and when the accumulator inlet pressure is more than P1 values again, whole process recycles, certainly successively Dynamic adjustment.
Preferably, the Energy Saving Control valve group includes pressure valve, pilot operated directional control valve, throttled directional valve, precursor overflow valve, Two damping holes, third damping hole, the 4th damping hole, the pilot operated directional control valve set spring pressure as P4 values, guide's overflow Valve sets pressure as P5 values, the throttled directional valve spool keep left work when generate pressure difference P6 values, left station work when institute It states third damping hole to be short-circuited, the sum of P4 values, P5 values and P6 values are set as the P1 values, and the sum of P4 values and P5 values are set as described P2 values, the spring pressure that the pressure valve is set is P3 value, when just having started the variable pump, the pressure valve right working position work, The throttled directional valve spool keeps left work, and the pilot operated directional control valve right working position work, the variable pump huge discharge is exported to institute Accumulator energy supply is stated, when the variable pump discharge pressure is more than P3 values, the left station work of pressure valve, until the accumulation of energy When device inlet pressure is more than P1 values, the left station of pilot operated directional control valve works, described in the variable pump discharge high-voltage oil liquid process Pressure valve, pilot operated directional control valve are connected to the variable oil cylinder rodless cavity and the variable pumpage are reduced, the check valve It closes, the outlet pressure decline of the variable pump leads to the left station work of the throttled directional valve, the variable pump discharge pressure Continue to drop to P3 values, the variable pump is in low pressure small displacement standby mode at this time；When the accumulator inlet pressure is less than When P2 values, the pilot operated directional control valve right working position work, the variable oil cylinder rodless cavity is connected to the fuel tank, the variable pumpage Increase and energized to accumulator, the throttled directional valve spool keeps left, whole when the accumulator inlet pressure is more than P1 values again A process recycles successively, adjust automatically.
Preferably, the Energy Saving Control valve group includes pressure valve, the first pilot operated directional control valve, the second pilot operated directional control valve, first Precursor overflow valve, the second precursor overflow valve, the second damping hole, third damping hole, the spring of the first pilot operated directional control valve setting Pressure P4 values and the sum of the pressure P5 values of first precursor overflow valve setting are set as P1 values, the first pilot operated directional control valve setting The sum of the pressure P6 values of spring pressure P4 values and second precursor overflow valve setting be set as P2 values, the pressure valve setting Spring pressure is P3 values, and the variable pump huge discharge is exported and energized to the accumulator when just starting, and second hydraulic control is changed Station works under to valve, and first pilot operated directional control valve and the pressure valve are in right working position work, when the variable pumps out When mouthful pressure is more than P3 values, the left station work of pressure valve, when the accumulator inlet pressure is more than P1 values, described the The left station work of one pilot operated directional control valve, the variable pump discharge high-voltage oil liquid are connected to the variable oil cylinder rodless cavity and make institute The reduction of variable pumpage is stated, the outlet pressure decline of the closed check valve, the variable pump leads to second liquid controlled reversing Station works on valve, and the variable pump discharge pressure continues to drop to P3 values, and the variable pump is in low pressure small displacement and waits at this time Machine state；When the accumulator inlet pressure is less than P2 values, the first pilot operated directional control valve right working position work, the variable pump Discharge capacity increases to be energized to accumulator, and station works under the second pilot operated directional control valve, when the accumulator inlet pressure is more than P1 again When value, whole process recycles successively, adjust automatically.
Control of this programme by Energy Saving Control valve group to accumulator inlet pressure so that when accumulator inlet pressure is higher than When the upper limit value of setting, variable pump is in low pressure small displacement standby mode；When lower limiting value of the accumulator inlet pressure less than setting When, huge discharge supplements fluid to variable pump to system again, and the adjustment of whole process automatic cycle can reduce energy consumption and system is made to work It is more stable.
Description of the drawings
Fig. 1 is existing force control hydraulic pressure system principle structural schematic diagram.
Fig. 2 is the force control hydraulic pressure energy saving of system principle of device structure chart of the present invention.
Fig. 3 is 1 principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment in the present invention.
Fig. 4 is 2 principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment in the present invention.
Fig. 5 is 3 principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment in the present invention.
Fig. 6 is 4 principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment in the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment, the invention will be further described, in order to clearer understanding this The claimed technological thought of invention.
The present embodiment provides a kind of force control hydraulic pressure energy saving of system method, pressure signal oil pipe is by accumulator inlet pressure Signal passes to Energy Saving Control valve group, and pressure P1, P2, P3 value, P1 >=P2 are set in Energy Saving Control valve group>Accumulator is worked as in P3 >=0 Inlet pressure be higher than P1 values when, the Energy Saving Control valve group work so that variable pump reduction discharge capacity and outlet pressure be down to P3 values, Variable pump is in low pressure small displacement standby mode, while closed check valve at this time, variable pump discharge and accumulator entrance be in every Disconnected state；When the inlet pressure of accumulator is less than P2 values, which, which works, makes the discharge capacity of variable pump increase, and becomes Amount pump restores to system feed flow, and whole process so recycles, adjust automatically.
With reference to Fig. 2, the present embodiment also provides a kind of pressure for realizing a kind of above-mentioned force control hydraulic pressure energy saving of system method Control hydraulic system energy-saving device, including variable pump 1, the variable oil cylinder 2 being connect with the variable pump 1, and 1 oil outlet of variable pump The accumulator 4 communicated and the check valve 3 being set between the accumulator 4 and variable pump 1,2 rodless cavity of variable oil cylinder Be connected to fuel tank 6 by the first damping hole 5,1 oil outlet of the variable pump respectively with 2 rod chamber of variable oil cylinder and energy-saving control valve 7 connection of group, the Energy Saving Control valve group 7 are also connected to fuel tank 6,2 rodless cavity of variable oil cylinder and 4 entrance of accumulator respectively, It is characterized in that：Including an Energy Saving Control valve group 7, and the pressure signal of connection the Energy Saving Control valve group 7 and 4 entrance of accumulator Oil pipe v.
Embodiment 1：
With reference to Fig. 3, above-mentioned Energy Saving Control valve group 7 includes pressure valve 8a, pilot operated directional control valve 9a, the second damping hole 10a, ratio Pressure valve 11a, pressure sensor 12a and controller 13a, the pressure sensor 12a export the collected variable pump 1 Pressure signal transmission gives the controller 13a, the controller 13a to send out instruction and adjusts it to the proportional pressure valve 11a and set Constant-pressure is P5 values or P6 values, and the spring pressure P4 values of the pilot operated directional control valve 9a settings are set with the proportional pressure valve 11a The sum of pressure P5 values be set as P1 values, the spring pressure P4 values of the pilot operated directional control valve 9a settings and the proportional pressure valve 11a The sum of pressure P6 values of setting are set as P2 values, and as P3 values, the variable pump 1 starts the spring pressure that the pressure valve 8a is set When, the pressure valve 8a and the pilot operated directional control valve 9a are right working position work, and 1 huge discharge of the variable pump is exported to the storage Energy device 4 energizes, when 1 outlet pressure of the variable pump is more than P3 values, the left station work of pressure valve 8a, when the accumulator When 4 inlet pressures are more than P1 values, the left station work of the pilot operated directional control valve 9a, the outlet high-voltage oil liquid of the variable pump 1 with it is described 2 rodless cavity of variable oil cylinder is connected to and 1 discharge capacity of the variable pump is reduced, and the check valve 3 is closed, and the variable pump 1 exports Pressure reduction, which causes the controller 13a to send instructions to the proportional pressure valve 11a, makes its setup pressure value be P6, the change Amount 1 outlet pressure of pump continues to drop to P3 values, and the variable pump 1 is in low pressure small displacement standby mode at this time；When the accumulation of energy When 4 inlet pressure of device is less than P2 values, the pilot operated directional control valve 9a right working positions work, described in 2 rodless cavity of the variable oil cylinder connection Fuel tank 6,1 discharge capacity of the variable pump increase, and the increase of 1 outlet pressure of the variable pump causes the controller 13a to send instructions to The proportional pressure valve 11a makes its setup pressure value be P5, when 4 inlet pressure of the accumulator is more than P1 values again, entirely Process recycles successively, adjust automatically.
Embodiment 2：
With reference to Fig. 4,7 groups of above-mentioned energy-saving control valve includes pressure valve 8b, the first pilot operated directional control valve 9b, the second pilot operated directional control valve 10b, the first precursor overflow valve 11b, the second precursor overflow valve 12b, the second damping hole 13b, third damping hole 14b, the 4th damping Hole 15b, the pressure of the spring pressure P4 values and the first precursor overflow valve 11b settings of the first pilot operated directional control valve 9b settings The sum of P5 values are set as P1 values, and the spring pressure P4 values of the first pilot operated directional control valve 9b settings are set with the second precursor overflow valve 12b The sum of fixed pressure P6 values are set as P2 values, and the spring pressure that the pressure valve 8b is set is P3 value, the variable pump 1 when just starting Huge discharge is exported and is energized to the accumulator 4, and station works under the second pilot operated directional control valve 10b, and first hydraulic control is changed It working to valve 9b right working positions so that the hydraulic coupling at the pressure valve 8b spools both ends is equal, under the promotion of its right end spring force, The pressure valve 8b right working positions work, until 4 inlet pressure of the accumulator is more than P1 values, the first pilot operated directional control valve 9b is left Station works, and the left station work of pressure valve 8b, the variable pump 1 exports high-voltage oil liquid and 2 rodless cavity of variable oil cylinder It is connected to and 1 discharge capacity of the variable pump is reduced, the check valve 3 is closed, and the outlet pressure decline of the variable pump 1 leads to institute It states station on the second pilot operated directional control valve 10b to work, 1 outlet pressure of the variable pump continues to drop to P3 values, at this time the variable Pump 1 is in low pressure small displacement standby mode；When 4 inlet pressure of the accumulator is less than P2 values, first pilot operated directional control valve The 9b and pressure valve 8b is in right working position work, and 1 discharge capacity of the variable pump increases to be energized to accumulator 4, and the second hydraulic control is changed Station works under to valve 10b, and when 4 inlet pressure of the accumulator is more than P1 values again, whole process is recycled, adjusted automatically successively It is whole.
Embodiment 3：
With reference to Fig. 5, above-mentioned Energy Saving Control valve group 7 includes pressure valve 8c, pilot operated directional control valve 9c, throttled directional valve 10c, guide Overflow valve 11c, the second damping hole 12c, third damping hole 13c, the 4th damping hole 14c, the pilot operated directional control valve 9c set spring Pressure P4 values, the precursor overflow valve 11c set pressure P5 values, the throttled directional valve 10c spools keep left work when generate pressure Force difference P6 values, when left station work, the third damping hole 13c was short-circuited, described in the sum of P4 values, P5 values and P6 values are set as P1 values, the sum of P4 values and P5 values are set as the P2 values, and the pressure valve 8c sets spring pressure as P3 values, just started the change When amount pump 1, pressure valve 8c right working positions work, the throttled directional valve 10c spools keep left work, the pilot operated directional control valve 9c Right working position works, and 1 huge discharge of the variable pump is exported to be energized to the accumulator 4, when 1 outlet pressure of the variable pump is more than P3 When value, the left station work of pressure valve 8c, when 4 inlet pressure of the accumulator is more than P1 values, the pilot operated directional control valve The left station work of 9c, the variable pump 1 export high-voltage oil liquid and are connected to the change by the pressure valve 8c, pilot operated directional control valve 9c It measures 2 rodless cavity of oil cylinder and 1 discharge capacity of the variable pump is reduced, the check valve 3 is closed, the outlet pressure of the variable pump 1 Decline causes the left station work of the throttled directional valve 10c, 1 outlet pressure of the variable pump to continue to drop to P3 values, at this time institute It states variable pump 1 and is in low pressure small displacement standby mode；When 4 inlet pressure of the accumulator is less than P2 values, the liquid controlled reversing Valve 9c right working positions work, and 2 rodless cavity of variable oil cylinder is connected to the fuel tank 6, and 1 discharge capacity of the variable pump increases to accumulator 4 Energy supply, the throttled directional valve 10c spools keep left, when 4 inlet pressure of the accumulator is more than P1 values again, whole process according to Secondary cycle, adjust automatically.
Embodiment 4：
With reference to Fig. 6,7 groups of above-mentioned energy-saving control valve includes pressure valve 8d, the first pilot operated directional control valve 9d, the second pilot operated directional control valve 10d, the first precursor overflow valve 11d, the second precursor overflow valve 12d, the second damping hole 13d, third damping hole 14d, described first The spring pressure P4 values and the sum of the pressure P5 values of the first precursor overflow valve 11d settings of pilot operated directional control valve 9d settings are set as P1 Value, the pressure P6 of the spring pressure P4 values and the second precursor overflow valve 12d settings of the first pilot operated directional control valve 9d settings The sum of value is set as P2 values, and the spring pressure that the pressure valve 8d is set is P3 value, 1 huge discharge of variable pump output when just starting And energized to the accumulator 4, station works under the second pilot operated directional control valve 10d, the first pilot operated directional control valve 9d and institute It states pressure valve 8d and is in right working position work, when 1 outlet pressure of the variable pump is more than P3 values, the left stations of pressure valve 8d Work, when 4 inlet pressure of the accumulator is more than P1 values, the left station work of the first pilot operated directional control valve 9d, the change 1 outlet high-voltage oil liquid of amount pump is connected to 2 rodless cavity of variable oil cylinder and 1 discharge capacity of the variable pump is reduced, described unidirectional Valve 3 is closed, and the outlet pressure decline of the variable pump 1 causes station on the second pilot operated directional control valve 10d to work, the variable It pumps 1 outlet pressure to continue to drop to P3 values, the variable pump 1 is in low pressure small displacement standby mode at this time；When the accumulator 4 When inlet pressure is less than P2 values, the first pilot operated directional control valve 9d right working positions work, 1 discharge capacity of the variable pump increases to accumulator 4 energize, and station works under the second pilot operated directional control valve 10d, when 4 inlet pressure of the accumulator is more than P1 values again, entire mistake Cheng Yici cycles, adjust automatically.
It should be further noted that：Pressure signal oil pipe in energy saver, which plays, passes accumulator inlet pressure signals The effect of Energy Saving Control valve group is passed, pressure sensor or relay can also be installed in accumulator entrance, by pressure herein Signal acquisition is simultaneously done and is converted into electric signal after proper treatment and passes to Energy Saving Control valve group, and equivalent pressure control work(may be implemented Energy；It is used as special circumstances, the P1 values of Energy Saving Control valve group setting that can be equal to P2 values simultaneously；And can have in hydraulic system more Group accumulator, they are respectively arranged with check valve between variable pump discharge, can draw pressure respectively from every group of accumulator entrance Pressure control function equally may be implemented to Energy Saving Control valve group in force signal oil pipe, should all be within protection domain.
The present invention can overcome the problems, such as that variable pump is constantly in high-pressure work state in conventional pressure control system so that Variable pump is standby to keep low pressure small displacement state at present, can reduce energy consumption and system work is made more to stablize.
The examples of implementation of the above are only the preferred embodiments of the invention, and the implementation model of the present invention is not limited with this It encloses, therefore changes made by all shapes according to the present invention, principle, should all cover within the scope of the present invention.

Claims (1)

1. a kind of force control hydraulic pressure energy saving of system device, including variable pump, connect with the variable pump variable oil cylinder, with the change Amount pumps out the accumulator and the check valve being set between the accumulator and variable pump that hydraulic fluid port communicates, the variable oil cylinder without Rod cavity is connected to fuel tank by the first damping hole, the variable pump oil outlet respectively with variable cylinder rod chamber and energy-saving control valve Group connection, the Energy Saving Control valve group are also connected to fuel tank, variable oil cylinder rodless cavity and accumulator entrance respectively, and feature exists In：It is described including an Energy Saving Control valve group, and the pressure signal oil pipe of connection the Energy Saving Control valve group and accumulator entrance Energy Saving Control valve group include two-bit triplet pressure valve, pilot operated directional control valve, the second damping hole, proportional pressure valve, pressure sensor and The collected variable pump outlet pressure signal is passed to the controller, the control by controller, the pressure sensor Device processed sends out instruction to the proportional pressure valve, and the proportional pressure valve can adjust it and set pressure as P5 values or P6 values, institute The spring pressure P4 values and the sum of the pressure P5 values of proportional pressure valve setting for stating pilot operated directional control valve setting are set as P1 values, described The sum of the pressure P6 values of spring pressure P4 values and the proportional pressure valve setting of pilot operated directional control valve setting are set as P2 values, and described two The three-way pressure valve spring pressure that sets in position is P3 value, when the variable pump startup, the two-bit triplet pressure valve and the liquid Control reversal valve is right working position work, and the variable pump huge discharge is exported to be energized to the accumulator, when the variable pump discharge When pressure is more than P3 values, the left station work of two-bit triplet pressure valve, when the accumulator inlet pressure is more than P1 values, institute The left station work of pilot operated directional control valve is stated, the variable pump discharge high-voltage oil liquid is connected to the variable oil cylinder rodless cavity and makes institute The reduction of variable pumpage, the closed check valve are stated, the variable pump discharge pressure reduction causes the controller to send instruction Its pressure value is set to be P6 to the proportional pressure valve, the variable pump discharge pressure continues to drop to P3 values, at this time the variable Pump is in low pressure small displacement standby mode；When the accumulator inlet pressure is less than P2 values, the pilot operated directional control valve right working position Work, the variable oil cylinder rodless cavity are connected to the fuel tank, and the variable pumpage increases, and the variable pump discharge pressure increases Cause the controller send instructions to the proportional pressure valve make its pressure value be P5, when the accumulator inlet pressure again When more than P1 values, whole process recycles successively, adjust automatically.
CN201710742313.8A 2016-01-28 2016-01-28 A kind of force control hydraulic pressure energy saving of system method and its energy saver Expired - Fee Related CN107327426B (en)

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CN107859665A (en) * 2017-11-24 2018-03-30 张宏伟 A kind of fluid control pressure valve group
CN108818883B (en) * 2018-07-09 2023-11-14 广东天恒液压机械有限公司 Ceramic press electrohydraulic control method and system
CN111365304B (en) * 2020-04-02 2022-01-21 江苏省机械研究设计院有限责任公司 Transmission hot sprocket link joint tensioning hydraulic device
CN113757225B (en) * 2020-06-03 2022-09-13 广州汽车集团股份有限公司 Pressure control method and device for energy accumulator

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CN105485067B (en) 2017-09-29
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