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
Referring to shown in accompanying drawing 1, existing common force control hydraulic pressure system its typically 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
To accumulator 4e feed flows during pump 1e startups, when variable pump 1e outlet pressure reaches pressure valve 8e spring pressures setting value and overflow
During valve 9e setup pressure value sum, the left station work of pressure valve 8e, variable pump 1e outlets fluid is connected by pressure valve 8e
Variable oil cylinder 2e rodless cavities are passed to so that variable pump 1e discharge capacities are reduced, now variable pump 1e is in high-pressure small-displacement holding state,
Above-mentioned force control hydraulic pressure system its problem of be primarily present:Its outlet is constantly in high pressure conditions during variable pump holding state,
Waste energy.In view of this, for how to search out the Stress control skill that a kind of low pressure is standby and allows system work more to stablize
Art means are just particularly important.
The content of the invention
In view of the shortcomings of the prior art, the present invention is intended to provide a kind of pressure for reducing energy consumption and allowing system work more to stablize
Power controls hydraulic system power-economizing method.
To achieve the above object, the present invention is adopted the following technical scheme that:A kind of force control hydraulic pressure energy saving of system method, its
It is characterised by: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 make it that variable pump reduces discharge capacity and outlet pressure is down to P3 values, and now variable pump is in low pressure small displacement holding state, together
When closed check valve, variable pump discharge and accumulator entrance are in cut-off state;When the inlet pressure of accumulator is less than P2 values,
The Energy Saving Control valve group, which works, causes the discharge capacity increase of variable pump, and variable pump recovers to system feed flow, whole process so circulates,
Adjust automatically, this method causes variable pump to 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 method 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 connected with the variable pump
The mouth accumulator communicated and the check valve being arranged 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-out is connected with variable cylinder rod chamber and Energy Saving Control valve group respectively,
The Energy Saving Control valve group is also connected with 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 variable pump outlet pressure signal collected is passed to the control by force snesor and controller, the pressure sensor
Device, the controller sends instruction and can adjust it to the proportional pressure valve and set pressure as P5 values or P6 values, the hydraulic control
The pressure P5 value sums that the spring pressure P4 values of reversal valve setting are set with the proportional pressure valve are set to P1 values, and the hydraulic control is changed
The pressure P6 value sums that the spring pressure P4 values set to valve are set with the proportional pressure valve are set to P2 values, and the pressure valve is set
Fixed spring pressure is P3 values, during the variable pump startup, and 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 with the variable oil cylinder rodless cavity and the variable pumpage is reduced, and the check valve is closed
Close, the variable pump discharge pressure, which is reduced, to be caused the controller to send instructions to the proportional pressure valve to make its pressure value be
P6, the variable pump discharge pressure continues to drop to P3 values, and now the variable pump is in low pressure small displacement holding state;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 connects institute
Fuel tank is stated, the variable pumpage increases, 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 circulates 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, the 3rd damping hole, the 4th damping hole, first pilot operated directional control valve
The pressure P5 value sums that the spring pressure P4 values of setting are set with first precursor overflow valve are set to P1 values, first hydraulic control
The pressure P6 value sums that the spring pressure P4 values of reversal valve setting are set with the second precursor overflow valve are set to 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 the pressure valve core two ends
Pressure is equal, under the promotion of its right-hand member 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 connects with the variable oil cylinder rodless cavity and the variable pumpage is reduced, the closed check valve, the variable
The outlet pressure of pump, which declines, causes station on second pilot operated directional control valve to work, and the variable pump discharge pressure continues to drop to
P3 values, now the variable pump is in low pressure small displacement holding state;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 is worked under two pilot operated directional control valves, and when the accumulator inlet pressure is more than P1 values again, whole process is circulated, 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, the
Two damping holes, the 3rd 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 valve element keep left work when produce pressure differential P6 values, its left station works when institute
State the 3rd damping hole to be short-circuited, P4 values, P5 values and P6 value sums are set as the P1 values, P4 values are set as described with P5 value sums
P2 values, the spring pressure that the pressure valve is set is P3 value, when just starting the variable pump, the pressure valve right working position work,
The throttled directional valve valve element is kept 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 work of pilot operated directional control valve, the variable pump discharge high-voltage oil liquid is by described
Pressure valve, pilot operated directional control valve are communicated to the variable oil cylinder rodless cavity and the variable pumpage are reduced, the check valve
Close, the outlet pressure of the variable pump, which declines, causes the left station work of the throttled directional valve, the variable pump discharge pressure
Continue to drop to P3 values, now the variable pump is in low pressure small displacement holding state;When the accumulator inlet pressure is less than
During P2 values, the pilot operated directional control valve right working position work, the variable oil cylinder rodless cavity connects the fuel tank, the variable pumpage
Increase and energized to accumulator, the throttled directional valve valve element keeps left, it is whole when the accumulator inlet pressure is more than P1 values again
Individual process is circulated 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, the 3rd damping hole, the spring of the first pilot operated directional control valve setting
The pressure P5 value sums that pressure P4 values are set with first precursor overflow valve are set to P1 values, the first pilot operated directional control valve setting
The pressure P6 value sums that set of spring pressure P4 values and second precursor overflow valve be set to P2 values, what the pressure valve was set
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 is pumped 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 connects with the variable oil cylinder rodless cavity and causes institute
The reduction of variable pumpage is stated, the closed check valve, the outlet pressure decline of the variable pump causes second liquid controlled reversing
Station works on valve, and the variable pump discharge pressure continues to drop to P3 values, and now the variable pump is treated in low pressure small displacement
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
During value, whole process is circulated 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
During the higher limit of setting, variable pump is in low pressure small displacement holding state;When lower limit 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 worked
It is more stable.
Brief description of the drawings
Fig. 1 is existing force control hydraulic pressure system principle structural representation.
Fig. 2 is force control hydraulic pressure energy saving of system principle of device structure chart of the invention.
Fig. 3 is the principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment 1 in the present invention.
Fig. 4 is the principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment 2 in the present invention.
Fig. 5 is the principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment 3 in the present invention.
Fig. 6 is the principle schematic diagram of force control hydraulic pressure energy saving of system device embodiment 4 in the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the invention will be further described, and this is understood in order to clearer
The claimed technological thought of invention.
The present embodiment provides a kind of force control hydraulic pressure energy saving of system method, and pressure signal oil pipe is by accumulator inlet pressure
Signal passes to setting pressure P1, P2, P3 value, P1 >=P2 in Energy Saving Control valve group, Energy Saving Control valve group>P3 >=0, works as accumulator
Inlet pressure when being higher than P1 values, the Energy Saving Control valve group, which works, causes variable pump reduction discharge capacity and outlet pressure is down to P3 values,
Now variable pump is in low pressure small displacement holding state, while closed check valve, variable pump discharge and accumulator entrance be in every
Disconnected state;When the inlet pressure of accumulator is less than P2 values, the Energy Saving Control valve group, which works, causes the discharge capacity increase of variable pump, becomes
Amount pump recovers to system feed flow, and whole process is so circulated, adjust automatically.
Reference picture 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 connected with the variable pump 1, and the oil-out of variable pump 1
The accumulator 4 communicated and the check valve 3 being arranged between the accumulator 4 and variable pump 1, the rodless cavity of variable oil cylinder 2
Fuel tank 6 is connected to by the first damping hole 5, the oil-out of variable pump 1 respectively with the rod chamber of variable oil cylinder 2 and energy-saving control valve
Group 7 is connected, and the Energy Saving Control valve group 7 is also connected with fuel tank 6, the rodless cavity of variable oil cylinder 2 and the entrance of accumulator 4 respectively, its
It is characterised by:Include the pressure signal of an Energy Saving Control valve group 7, and the connection Energy Saving Control valve group 7 and the entrance of accumulator 4
Oil pipe v.
Embodiment 1:
Reference picture 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 variable pump 1 collected
Pressure signal transmission gives the controller 13a, the controller 13a to send 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
Pressure P5 value sums be set to P1 values, the spring pressure P4 values and the proportional pressure valve 11a of the pilot operated directional control valve 9a settings
The pressure P6 value sums of setting are set to P2 values, and the spring pressure that the pressure valve 8a is set is P3 value, and the variable pump 1 starts
When, the pressure valve 8a and the pilot operated directional control valve 9a are right working position work, and the huge discharge of variable pump 1 is exported to be stored to described
Energy device 4 is energized, when the outlet pressure of variable pump 1 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 variable pump 1 export high-voltage oil liquid with it is described
The rodless cavity of variable oil cylinder 2 is connected and the discharge capacity of variable pump 1 is reduced, and the check valve 3 is closed, and the variable pump 1 is exported
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
The amount outlet pressure of pump 1 continues to drop to P3 values, and now the variable pump 1 is in low pressure small displacement holding state;When the accumulation of energy
When the inlet pressure of device 4 is less than P2 values, the pilot operated directional control valve 9a right working positions work, the rodless cavity of variable oil cylinder 2 connection is described
Fuel tank 6, the discharge capacity of variable pump 1 increase, the outlet pressure of variable pump 1 increase causes the controller 13a to send instructions to
The proportional pressure valve 11a makes its setup pressure value be P5, when the inlet pressure of accumulator 4 is more than P1 values again, entirely
Process is circulated successively, adjust automatically.
Embodiment 2:
Reference picture 4, above-mentioned 7 groups of 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, the 3rd damping hole 14b, the 4th damping
Hole 15b, the spring pressure P4 values and the pressure of the first precursor overflow valve 11b settings of the first pilot operated directional control valve 9b settings
P5 value sums are set to 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
Fixed pressure P6 value sums are set to 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 energized to the accumulator 4, and station works under the second pilot operated directional control valve 10b, and first hydraulic control is changed
Worked to valve 9b right working positions so that the hydraulic coupling at the pressure valve 8b valve elements two ends is equal, under the promotion of its right-hand member spring force,
The pressure valve 8b right working positions work, until the inlet pressure of accumulator 4 is more than P1 values, the first pilot operated directional control valve 9b is left
Station works, the left station work of pressure valve 8b, the outlet high-voltage oil liquid of variable pump 1 and the rodless cavity of variable oil cylinder 2
Connect and the discharge capacity of variable pump 1 is reduced, the check valve 3 is closed, the outlet pressure of the variable pump 1, which declines, causes institute
State station on the second pilot operated directional control valve 10b to work, the outlet pressure of variable pump 1 continues to drop to P3 values, now the variable
Pump 1 is in low pressure small displacement holding state;When the inlet pressure of accumulator 4 is less than P2 values, first pilot operated directional control valve
9b and the pressure valve 8b are in right working position work, and the discharge capacity of variable pump 1 increases to be energized to accumulator 4, and the second hydraulic control is changed
Station is worked under to valve 10b, and when the inlet pressure of accumulator 4 is more than P1 values again, whole process is circulated, adjusted automatically successively
It is whole.
Embodiment 3:
Reference picture 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, the 3rd 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 sets pressure P5 values, the throttled directional valve 10c valve elements keep left work when produce and press
Power difference P6 values, the 3rd damping hole 13c described in during its left station work is short-circuited, and P4 values, P5 values and P6 value sums are set as described
P1 values, P4 values are set as the P2 values with P5 value sums, and the pressure valve 8c sets spring pressure as P3 values, just started the change
When measuring pump 1, pressure valve 8c right working positions work, the throttled directional valve 10c valve elements keep left work, the pilot operated directional control valve 9c
Right working position is worked, and the huge discharge of variable pump 1 is exported to be energized to the accumulator 4, when the outlet pressure of variable pump 1 is more than P3
During value, the left station work of pressure valve 8c, when the inlet pressure of accumulator 4 is more than P1 values, the pilot operated directional control valve
The left station work of 9c, the outlet of variable pump 1 high-voltage oil liquid is communicated to the change by the pressure valve 8c, pilot operated directional control valve 9c
The rodless cavity of gauging cylinder 2 simultaneously causes the discharge capacity of variable pump 1 to reduce, and 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, and the outlet pressure of variable pump 1 continues to drop to P3 values, now institute
State variable pump 1 and be in low pressure small displacement holding state;When the inlet pressure of accumulator 4 is less than P2 values, the liquid controlled reversing
Valve 9c right working positions work, and the rodless cavity of variable oil cylinder 2 connects the fuel tank 6, and the discharge capacity of variable pump 1 increases to accumulator 4
Energy supply, the throttled directional valve 10c valve elements keep left, when the inlet pressure of accumulator 4 is more than P1 values again, whole process according to
Secondary circulation, adjust automatically.
Embodiment 4:
Reference picture 6, above-mentioned 7 groups of 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, the 3rd damping hole 14d, described first
The spring pressure P4 values of pilot operated directional control valve 9d settings are set to P1 with the first precursor overflow valve 11d pressure P5 value sums set
Value, the spring pressure P4 values and the pressure P6 of the second precursor overflow valve 12d settings of the first pilot operated directional control valve 9d settings
Value sum is set to P2 values, and the spring pressure that the pressure valve 8d is set is P3 value, the huge discharge of variable pump 1 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
State pressure valve 8d and be in right working position work, when the outlet pressure of variable pump 1 is more than P3 values, the left stations of pressure valve 8d
Work, when the inlet pressure of accumulator 4 is more than P1 values, the left station work of the first pilot operated directional control valve 9d is described to become
Amount pump 1 outlet high-voltage oil liquid connects with the rodless cavity of variable oil cylinder 2 and the discharge capacity of variable pump 1 is reduced, described unidirectional
Valve 3 is closed, and the outlet pressure of the variable pump 1, which declines, causes station on the second pilot operated directional control valve 10d to work, the variable
The outlet pressure of pump 1 continues to drop to P3 values, and now the variable pump 1 is in low pressure small displacement holding state;When the accumulator 4
When inlet pressure is less than P2 values, the first pilot operated directional control valve 9d right working positions work, the discharge capacity of variable pump 1 increases to accumulator
Station works under 4 energy supplies, the second pilot operated directional control valve 10d, when the inlet pressure of accumulator 4 is more than P1 values again, whole mistake
Cheng Yici circulations, adjust automatically.
It should be further stated that:Pressure signal oil pipe in energy saver, which is played, 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 electric signal is converted into after proper treatment passes to Energy Saving Control valve group, it is possible to achieve equivalent Stress control work(
Energy;Simultaneously as special circumstances, the P1 values of Energy Saving Control valve group setting can be equal to P2 values;And can have in hydraulic system many
Group accumulator, they are respectively arranged with check valve between variable pump discharge, can draw pressure respectively from every group of accumulator entrance
Force signal oil pipe can equally realize pressure control function to Energy Saving Control valve group, all should be within protection domain.
The present invention can overcome the problem of 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 more stablized.
Examples of implementation described above are only the preferred embodiments of the invention, and the implementation model of the present invention is not limited with this
Enclose, therefore the change that all shape, principles according to the present invention are made, it all should cover within the scope of the present invention.