CN104358285B - The energy-saving turntable drive system of excavator based on double motor and hydraulic accumulator - Google Patents
The energy-saving turntable drive system of excavator based on double motor and hydraulic accumulator Download PDFInfo
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- CN104358285B CN104358285B CN201410596374.4A CN201410596374A CN104358285B CN 104358285 B CN104358285 B CN 104358285B CN 201410596374 A CN201410596374 A CN 201410596374A CN 104358285 B CN104358285 B CN 104358285B
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- 239000012530 fluid Substances 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims description 25
- 238000013016 damping Methods 0.000 claims description 24
- 239000002828 fuel tank Substances 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 13
- 230000008859 change Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 230000000979 retarding effect Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses the energy-saving turntable drive system of a kind of excavator based on double motor and hydraulic accumulator, when turntable retarding braking, auxiliary hydraulic pump/motor operations is in pump pattern, hydraulic accumulator is carried out oil-filled, rotary braking kinetic energy is converted into hydraulic energy and is stored in hydraulic accumulator, it is to avoid the spill losses in turntable braking procedure；Additionally, can not suddenly change at the pressure due to hydraulic accumulator, reduce the impact in turntable braking procedure.When hydraulic excavating machine turn table accelerates to rotate, auxiliary hydraulic pump/motor operations, at motoring mode, hydraulic accumulator release hydraulic oil, drives auxiliary hydraulic pressure pump/motor auxiliary hydraulic motor to drive turntable to accelerate, reduces the energy loss of engine；The pressure change of hydraulic accumulator is converted into change in torque and passes through torque couple with hydraulic motor again by auxiliary hydraulic pressure pump/motor, when solving single fluid motor-driven turntable, the impact on turntable operating characteristics of the hydraulic accumulator pressure change when when turntable retarding braking.
Description
Technical field
The present invention relates to the energy-saving turntable drive system of a kind of excavator based on double motor and hydraulic accumulator.
Background technology
Hydraulic crawler excavator is the engineering machinery that a kind of power is bigger, but the overall utilization of its energy is relatively low.Liquid
Pressure excavator realizes the target that energy-saving and emission-reduction always industry lays siege to.
The inertia of hydraulic excavating machine turn table is relatively big, swings relatively more frequent, and when turntable is braked, hydraulic motor is braked
Time, fuel feeding and oil return circuit are the most cut-off, and return line pressure raises because of motor inertia, and slew gear is braked
Time mainly set up braking moment by overflow valve and make rotary system gradually slow down, due to rotating mechanism of dredger inertia
Relatively big, gyration frequent, causes substantial amounts of braking energy to change into spill losses.
When turning round pilot operated handle and returning to middle position from rotation of rotary table, due to the inertia force effect of top turntable,
The biggest inertia impact can be produced.At present, although hydraulic crawler excavator uses the overflow valve with two-stage Pressure Step
Control the oil pressure rate of climb, make oil pressure realize two-stage Stress control, reduce compression shock.But still exist relatively
Big compression shock.
Summary of the invention
The invention provides the energy-saving turntable drivetrain of a kind of excavator based on double motor and hydraulic accumulator
System, which overcomes spill losses in background technology intermediate station braking procedure, that turntable returns to inertia impact during middle position is big
Shortcoming, meanwhile, also have make turntable reduce in accelerator engine power loss advantage.
The present invention solves being the technical scheme is that of its technical problem
The energy-saving turntable drive system of excavator based on double motor and hydraulic accumulator, including pilot operated hand
Handle, pioneer pump, variable pump, engine, banked direction control valves, Y type three-dimensional four-way pilot operated directional control valve, the first damping hole,
Second damping hole, the first 2/2-way pilot operated directional control valve, the second 2/2-way pilot operated directional control valve, the first hydraulic control list
To valve, the second hydraulic control one-way valve, the 3rd two-bit triplet pilot operated directional control valve, the 4th two-bit triplet pilot operated directional control valve,
First shuttle valve, the second shuttle valve, hydraulic motor, auxiliary hydraulic pressure pump/motor, decelerator, turntable, three, M type
Four-way pilot operated directional control valve, hydraulic accumulator, inverted flux control pressure sensing cell, the 5th two-bit triplet hydraulic control are changed
To valve and the 6th two-bit triplet pilot operated directional control valve；
Wherein:
Engine, pioneer pump and variable pump are coaxially mechanically coupled, the oil-in connected tank of variable pump；Banked direction control valves
P mouth and P1 mouth are all connected with the oil-out of variable pump, the T mouth connected tank of banked direction control valves；The D mouth of banked direction control valves is with negative
Flow-control pressure sensing cell is connected；The A mouth of banked direction control valves at least divides four tunnels: the first via and the A of hydraulic motor
Chamber is connected, and the second tunnel is connected with the oil-in A2 of the first shuttle valve, the 3rd road and the 5th two-bit triplet liquid controlled reversing
The control port of valve is connected, and the first 2/2-way pilot operated directional control valve connected tank is passed through on the 4th tunnel；The B mouth of banked direction control valves
At least divide four tunnels: the first via is connected with the B chamber of hydraulic motor, the oil-in A2 phase of the second road and the second shuttle valve
Even, the 3rd tunnel is connected with the control port of the 6th two-bit triplet pilot operated directional control valve, and the 4th tunnel passes through the second two two
Logical pilot operated directional control valve connected tank；
Hydraulic motor, auxiliary hydraulic pressure pump/motor, decelerator and turntable are mechanically coupled；Auxiliary hydraulic pressure pump/motor
A chamber is connected with P mouth, the oil-in A1 of the first shuttle valve of M type three-dimensional four-way pilot operated directional control valve；Auxiliary hydraulic pressure
The B chamber of pump/motor is connected with the T mouth of M type 3-position 4-way pilot operated directional control valve, the oil-in A1 of the second shuttle valve；
The B mouth connected tank of M type 3-position 4-way pilot operated directional control valve, the A mouth of M type 3-position 4-way pilot operated directional control valve and liquid
Pressure accumulator is connected；
The oil-in of pioneer pump is connected with fuel tank, and the oil-out of pioneer pump at least divides four tunnels: the first via meets guide behaviour
Make the hydraulic fluid port P of handle；Second tunnel connects the B mouth of the first hydraulic control one-way valve, and the A mouth of the first hydraulic control one-way valve connects
The P mouth of five two-bit triplet pilot operated directional control valves, the T mouth connected tank of the 5th two-bit triplet pilot operated directional control valve, the 5th liang
The control port of position threeway pilot operated directional control valve meets the A chamber of hydraulic motor, the A of the 5th two-bit triplet pilot operated directional control valve
Mouthful it is connected with the P mouth of the 3rd two-bit triplet pilot operated directional control valve, the T mouth of the 3rd two-bit triplet pilot operated directional control valve and the
The A mouth of two two-bit triplet pilot operated directional control valves is connected, a hydraulic fluid port of the second damping hole is connected, the second damping hole
The control port of another hydraulic fluid port and the second 2/2-way pilot operated directional control valve is connected, the 3rd two-bit triplet liquid controlled reversing
The A mouth of valve is connected with the control port K1 of M type 3-position 4-way pilot operated directional control valve；3rd tunnel connects three four, Y type
The P mouth of logical pilot operated directional control valve, the T mouth connected tank of Y type 3-position 4-way pilot operated directional control valve, Y type 3-position 4-way liquid
The A mouth of control reversal valve and the P mouth of the first two-bit triplet pilot operated directional control valve are connected, the first two-bit triplet liquid controlled reversing
The T mouth connected tank of valve, the B mouth of Y type 3-position 4-way pilot operated directional control valve and the second two-bit triplet pilot operated directional control valve
P mouth is connected, the T mouth connected tank of the second two-bit triplet pilot operated directional control valve, Y type three-dimensional four-way pilot operated directional control valve
Two control port K1 with K2 respectively with the first shuttle valves, the oil-outs of the second shuttle valve are connected；4th tunnel connects second
The B mouth of hydraulic control one-way valve, the A mouth of the second hydraulic control one-way valve connects the P mouth of the 6th two-bit triplet pilot operated directional control valve,
The T mouth connected tank of the 6th two-bit triplet pilot operated directional control valve, the control port of the 6th two-bit triplet pilot operated directional control valve connects
The B chamber of hydraulic motor, the A mouth of the 6th two-bit triplet pilot operated directional control valve and the 4th two-bit triplet pilot operated directional control valve
T mouth is connected, the P mouth of the 4th two-bit triplet pilot operated directional control valve and the A mouth of the first two-bit triplet pilot operated directional control valve,
One hydraulic fluid port of the first damping hole is connected, another hydraulic fluid port of the first damping hole and the first 2/2-way liquid controlled reversing
The control port of valve is connected, the A mouth of the 4th two-bit triplet pilot operated directional control valve and M type 3-position 4-way liquid controlled reversing
The control port K2 of valve is connected；
The output pilot pressure signal b1 of pilot operated handle divides four tunnels to control: the first via connects the control of banked direction control valves
Hydraulic fluid port K2, the second tunnel connects the control port of the first two-bit triplet pilot operated directional control valve, and the 3rd tunnel connects the first fluid-control one-way
The control port of valve, the 4th tunnel connects the control port of the 3rd two-bit triplet pilot operated directional control valve；Pilot operated handle
Output pilot pressure signal b2 divides four tunnels to control: the first via meets the control port K1 of banked direction control valves, and the second tunnel connects the
The control port of two two-bit triplet pilot operated directional control valves, the 3rd tunnel connects the control port of the second hydraulic control one-way valve, and the 4th
Road connects the control port of the 4th two-bit triplet pilot operated directional control valve.
Among one embodiment: also include other actuator driven systems, the oil-out phase of its oil-in and variable pump
Even.
Among one embodiment: also include tradition turntable fluid motor-driven adjunct unit, the 5th of banked direction control valves A mouth
Road connects tradition turntable fluid motor-driven adjunct unit, and the 5th tunnel of banked direction control valves B mouth connects tradition turntable hydraulic motor
Drive adjunct unit.
Among one embodiment: also include the first overflow valve, the 5th tunnel of the oil-out of described pioneer pump connects first and overflows
The oil-in of stream valve, the oil-out connected tank of the first overflow valve.
Among one embodiment: also include the second overflow valve, the oil-out of its oil-in link variable pump, it is fuel-displaced
Mouth connected tank.
Among one embodiment: also include the 3rd overflow valve, its oil-in connects M type 3-position 4-way pilot operated directional control valve
A mouth, its oil-out connected tank.
Among one embodiment: described inverted flux control pressure sensing cell includes the 3rd damping hole and the 4th overflow valve,
One hydraulic fluid port of the 3rd damping hole is connected with the D mouth of banked direction control valves, another hydraulic fluid port connected tank, the 4th overflow valve
Oil-in is connected with the D mouth of banked direction control valves, oil-out connected tank.
Among one embodiment: other actuator driven systems described be swing arm drive system or dipper drive system or
Travel driving system.
The technical program is compared with background technology, and it has the advantage that
1, when turntable retarding braking, hydraulic accumulator, in pump pattern, is carried out by auxiliary hydraulic pump/motor operations
Oil-filled, rotary braking kinetic energy is converted into hydraulic energy and is stored in hydraulic accumulator, takes full advantage of hydraulic accumulator
Can the advantage of fast storage energy, it is to avoid the spill losses in turntable braking procedure.Simultaneously by hydraulic pressure horse
Reach the pressure off-load of brake chamber to achieve turntable braking kinetic energy and distribute to the braking of auxiliary hydraulic pressure pump/motor as far as possible
Chamber, it is ensured that energy recovery efficiency.Additionally, can not suddenly change at the pressure due to hydraulic accumulator, reduce and turn
Impact in platform braking procedure.
2, when hydraulic excavating machine turn table accelerates to rotate, auxiliary hydraulic pump/motor operations is at motoring mode, hydraulic pressure
Accumulator release hydraulic oil, drives auxiliary hydraulic pressure pump/motor auxiliary hydraulic motor to drive turntable to accelerate, reduces and send out
The energy loss of motivation；
3, this whole turntable drive system is by detecting the pressure signal of pilot operated handle output and each hydraulic valve
Between formed oil circuit logical relation can turntable is static, anticlockwise, anticlockwise regenerative braking, anticlockwise
The multiple-working modes such as throttling is braked, right rotation, right rotation regenerative braking, right rotation throttling braking are automatic
Identify；
4, the pressure of hydraulic accumulator is changed and is converted into change in torque again and hydraulic motor by auxiliary hydraulic pressure pump/motor
By torque couple, when solving single fluid motor-driven turntable, the hydraulic pressure when when turntable retarding braking stores
Can the device pressure change impact on turntable operating characteristics.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 depicts the concrete system construction drawing of the preferred embodiments of the invention.
Detailed description of the invention
Refer to Fig. 1, it illustrates the concrete decorum structure chart of the preferred embodiments of the invention, based on double motor
With the energy-saving turntable drive system of the excavator of hydraulic accumulator, including pilot operated handle the 1, first overflow
Valve 2, pioneer pump 3, variable pump 4, engine the 5, second overflow valve 6, other actuator driven systems 7,
Banked direction control valves 8, tradition turntable fluid motor-driven adjunct unit 9, Y type 3-position 4-way pilot operated directional control valve 10, the
One two-bit triplet pilot operated directional control valve the 11, second two-bit triplet pilot operated directional control valve the 12, first damping hole 13, second
Damping hole the 14, first 2/2-way pilot operated directional control valve the 15, second 2/2-way pilot operated directional control valve the 16, first liquid
Control check valve the 17, second hydraulic control one-way valve the 18, the 3rd two-bit triplet pilot operated directional control valve the 19, the 4th two-bit triplet
Pilot operated directional control valve the 20, first shuttle valve the 21, second shuttle valve 22, hydraulic motor 23, auxiliary hydraulic pressure pump/motor
24, decelerator 25, turntable 26, M type 3-position 4-way pilot operated directional control valve the 27, the 3rd overflow valve 28, hydraulic pressure
Accumulator 29, the 3rd damping hole 30, the 4th overflow valve 31, the 5th two-bit triplet pilot operated directional control valve 32,
Six two-bit triplet pilot operated directional control valves 33；
Wherein:
Engine 5, pioneer pump 3 and variable pump 4 are coaxially mechanically coupled；The oil-in of variable pump 4 and fuel tank phase
Even；The oil-in of the second overflow valve 6, the oil-in of other actuator driven systems 7 and the P of banked direction control valves 8
Mouth and P1 mouth are all connected with the oil-out of variable pump 4, the oil-out connected tank of the second overflow valve 6, banked direction control valves 8
T mouth connect fuel tank, the D mouth of banked direction control valves 8 and the oil-in of the 4th overflow valve 31 and the 3rd restriction 30
Oil-in be connected, the oil-out of the 3rd restriction 30 and the oil-out of the 4th overflow valve 31 are all connected with fuel tank；
The A mouth of banked direction control valves 8 is divided into five tunnels: the first via is connected with the A chamber of hydraulic motor 23, the second road and the first shuttle
The oil-in A2 of valve 21 is connected, and the 3rd tunnel is connected with the control port of the 5th two-bit triplet pilot operated directional control valve 32,
The first 2/2-way pilot operated directional control valve 15 connected tank is passed through on 4th tunnel, and the 5th tunnel connects tradition turntable hydraulic motor and drives
Dynamic adjunct unit 9；The B mouth of banked direction control valves 8 is divided into five tunnels: the first via is connected with the B chamber of hydraulic motor 23,
Second tunnel is connected with the oil-in A2 of the second shuttle valve 22, the 3rd road and the 6th two-bit triplet pilot operated directional control valve 33
Control port be connected, the 4th tunnel connects fuel tank by the second 2/2-way pilot operated directional control valve 16, and the 5th tunnel connects
Tradition turntable fluid motor-driven adjunct unit 9；
Hydraulic motor 23, auxiliary hydraulic pressure pump/motor 24, decelerator 25 and turntable 26 are mechanically coupled；Auxiliary
The A chamber of hydraulic pump/motor 24 and the P mouth of M type 3-position 4-way pilot operated directional control valve 27, the first shuttle valve 21
Oil-in A1 is connected；The B chamber of auxiliary hydraulic pressure pump/motor 24 and M type 3-position 4-way pilot operated directional control valve 27
T mouth, the oil-in A1 of the second shuttle valve 22 are connected；The B mouth of M type 3-position 4-way pilot operated directional control valve 27 connects oil
Case, the A mouth of M type 3-position 4-way pilot operated directional control valve 27 and entering of hydraulic accumulator the 29, the 3rd overflow valve 28
Hydraulic fluid port is connected, the oil-out connected tank of the 3rd overflow valve 28.
The oil-in of pioneer pump 3 is connected with fuel tank, and the oil-out of pioneer pump 3 divides five tunnels: the first via meets guide behaviour
Make the hydraulic fluid port P of handle 1；Second tunnel meets the B mouth of the first hydraulic control one-way valve 17, the A of the first hydraulic control one-way valve 17
Mouth connects the P mouth of the 5th two-bit triplet pilot operated directional control valve 32, and the T mouth of the 5th two-bit triplet pilot operated directional control valve 32 connects
Fuel tank, the control port of the 5th two-bit triplet pilot operated directional control valve 32 connects the A chamber of hydraulic motor 23, the 5th two
The A mouth of threeway pilot operated directional control valve 32 and the P mouth of the 3rd two-bit triplet pilot operated directional control valve 19 are connected, the 3rd liang
The T mouth of position threeway pilot operated directional control valve 19 and the A mouth of the second two-bit triplet pilot operated directional control valve 12, the second damping
One hydraulic fluid port in hole 14 is connected, another hydraulic fluid port of the second damping hole 14 and the second 2/2-way pilot operated directional control valve
The control port of 16 is connected, and the A mouth of the 3rd two-bit triplet pilot operated directional control valve 19 changes with M type 3-position 4-way hydraulic control
It is connected to the control port K1 of valve 27；3rd tunnel meets the P mouth of Y type 3-position 4-way pilot operated directional control valve 10, Y
The T mouth connected tank of type 3-position 4-way pilot operated directional control valve 10, the A mouth of Y type 3-position 4-way pilot operated directional control valve 10 and
The P mouth of the first two-bit triplet pilot operated directional control valve 11 is connected, and the T mouth of the first two-bit triplet pilot operated directional control valve 11 connects
Fuel tank, the B mouth of Y type 3-position 4-way pilot operated directional control valve 10 and the P mouth of the second two-bit triplet pilot operated directional control valve 12
It is connected, the T mouth connected tank of the second two-bit triplet pilot operated directional control valve 12, Y type 3-position 4-way pilot operated directional control valve 10
The oil-out of two control port K1 with K2 respectively with the first shuttle valve the 21, second shuttle valves 22 be connected；4th
Road connects the B mouth of the second hydraulic control one-way valve 18, and the A mouth of the second hydraulic control one-way valve 18 connects the 6th two-bit triplet liquid
The P mouth of control reversal valve 33, the T mouth connected tank of the 6th two-bit triplet pilot operated directional control valve 33, the 6th two-bit triplet
The control port of pilot operated directional control valve 33 connects the B chamber of hydraulic motor 23, the 6th two-bit triplet pilot operated directional control valve 33
A mouth and the 4th two-bit triplet pilot operated directional control valve 20 T mouth be connected, the 4th two-bit triplet pilot operated directional control valve 20
P mouth and the A mouth of the first two-bit triplet pilot operated directional control valve 11, the first damping hole 13 a hydraulic fluid port be connected,
Another hydraulic fluid port of first damping hole 13 and the control port of the first 2/2-way pilot operated directional control valve 15 are connected, the
The A mouth of four two-bit triplet pilot operated directional control valves 20 and the control port K2 of M type 3-position 4-way pilot operated directional control valve 27
It is connected；5th tunnel connects the oil-in of the first overflow valve 2, the oil-out connected tank of the first overflow valve 2；；
The output pilot pressure signal b1 of pilot operated handle 1 divides four tunnels: the first via connects the control of banked direction control valves 8
Hydraulic fluid port K2, the second tunnel connects the control port of the first two-bit triplet pilot operated directional control valve 11, and the 3rd tunnel connects the first hydraulic control
The control port of check valve 17, the 4th tunnel connects the control port of the 3rd two-bit triplet pilot operated directional control valve 19；Guide
The output pilot pressure signal b2 of operation handle 1 divides four tunnels: the first via meets the control port K1 of banked direction control valves 8,
Second tunnel connects the control port of the second two-bit triplet pilot operated directional control valve 12, and the 3rd tunnel connects the second hydraulic control one-way valve 18
Control port, the 4th tunnel connects the control port of the 4th two-bit triplet pilot operated directional control valve 20；
In the present embodiment, these other actuator driven systems 12 be swing arm drive system, dipper drive system,
Travel driving system etc.；Banked direction control valves 8 also includes the control unit (figure for controlling other actuator driven systems
Not shown in)；This pilot operated handle 1 also includes the control unit for controlling other actuator driven systems
(not shown)；
The operation principle of the present embodiment be explained in detail below:
The 4th overflow valve 31 and it is provided with on the middle position drainback passage of the banked direction control valves 8 in hydraulic system
Three restrictions 30 and form inverted flux control pressure sensing cell fluid and produce pressure reduction by the 3rd restriction 30,
And then the discharge capacity of control variables pump 4.Due to the reasons in structure of pilot operated handle 1, any moment, its guide
Output pressure b1, b2Impossible two are both greater than zero simultaneously.
(1) stop mode
Output pressure signal b when guide's manipulator's handle 11And b2It is respectively less than certain pilot pressure threshold value pi(pi
Be one less more than zero on the occasion of, in order to avoid being in noise jamming during middle position by handle) turntable 26 is quiet
Time only, two cavity pressures of hydraulic motor 23 are less, all of two-bit triplet pilot operated directional control valve 11,12,19,
20,32 and 33, being all operated in initial station, M type 3-position 4-way pilot operated directional control valve 27 is operated in middle position, Y
Type 3-position 4-way pilot operated directional control valve 10 is operated in middle position, the first 2/2-way pilot operated directional control valve 15 and the second two
Two lead to pilot operated directional control valve 16 is operated in initial station, the first hydraulic control one-way valve 17 and the second hydraulic control one-way valve 18
Reversely cut-off；Mechanical braking (not shown in figure 1) works, and banked direction control valves 8 is in middle position, variable pump 4 complete
Portion's hydraulic oil passes through oil circuit P1-D and the 3rd restriction 30 oil return box of banked direction control valves 8.
(2) turntable rotary mode
One of them output pressure signal b when guide's manipulator's handle 11And b2More than certain pilot pressure threshold value
piTime, turntable be in anticlockwise pattern or right rotation pattern (here as a example by right rotation, anticlockwise operation principle
With reference to right rotation pattern).
Output pressure signal b when guide's manipulator's handle 12Become larger and be more than certain pilot pressure threshold value pi
Time, control port K1 with b2 of banked direction control valves 8 communicates, and banked direction control valves 8 is operated in left station, hydraulic fluid port P-A and
B-T communicates, and turntable is in right rotation pattern.
Second two-bit triplet pilot operated directional control valve 12 and the control port of the 4th two-bit triplet pilot operated directional control valve 20,
The control port of two hydraulic control one-way valves 18 and pilot pressure signal b2Communicate, the first two-bit triplet pilot operated directional control valve
11 and the 3rd control port of two-bit triplet pilot operated directional control valve 19, the control port of the first hydraulic control one-way valve 17
With pilot pressure signal b1Communicate, now due to the output pressure signal b of pilot operated handle 11Close to null value
And b2More than pilot pressure threshold value pi, the second two-bit triplet pilot operated directional control valve 12 and the 4th two-bit triplet hydraulic control are changed
It is operated in right bit to valve 20, the second hydraulic control one-way valve 18 reverse-conducting, the 6th two-bit triplet pilot operated directional control valve
The control port of 33 is connected with the B chamber of hydraulic motor 23, during due to right rotation, and the B chamber of hydraulic motor 23
Pressure the least, the 6th two-bit triplet pilot operated directional control valve 33 is operated in right working position, therefore the outlet of pioneer pump 3
Pilot control pressure oil through the hydraulic fluid port P-A of the second hydraulic control one-way valve the 18, the 6th two-bit triplet pilot operated directional control valve 33,
The hydraulic fluid port T-A of the 4th two-bit triplet pilot operated directional control valve 20 acts on M type 3-position 4-way pilot operated directional control valve 27
Control port K2, and the control port K1 of M type 3-position 4-way pilot operated directional control valve 27 is through the 3rd two-bit triplet liquid
The hydraulic fluid port A-T of control pilot operated directional control valve 19, the hydraulic fluid port A-T connected tank of the second two-bit triplet pilot operated directional control valve 12,
Therefore M type 3-position 4-way pilot operated directional control valve 27 is operated in right working position, and the A chamber of auxiliary hydraulic pressure pump/motor 24 leads to
The hydraulic fluid port P-A crossing M type 3-position 4-way pilot operated directional control valve 27 is connected with hydraulic accumulator 29, hydraulic accumulator
29 release hydraulic oil, drive auxiliary hydraulic pressure pump/motor 24 to be operated in motoring mode auxiliary hydraulic motor 23 and drive
Turntable 26, hydraulic accumulator 29 produces a pressure reduction, to turntable 26 in two chambeies of auxiliary hydraulic pressure pump/motor 24
Produce a driving moment, it is achieved the accelerator of turntable 26.Due to auxiliary hydraulic pressure pump/motor 24 to turn
The driving moment of platform 26, reduces the A cavity pressure of hydraulic motor 23, and then the outlet pressure of variable pump 4
Less, reduce the energy loss of engine 5.
(3) braking mode
As a example by anticlockwise is braked, right rotation braking is braked with reference to anticlockwise；
1) regenerative braking pattern
When guide's manipulator's handle 1 unclamp return to middle position time, its output pressure signal b1And b2It is respectively less than certain first
Lead pressure threshold piTime, banked direction control valves 8 is in middle position, and hydraulic fluid port A-T or B-T of banked direction control valves 8 blocks completely,
Turntable is in regenerative braking pattern.Due to the inertia of turntable 26, can be formerly in the A chamber of hydraulic motor 23
Leading the moment of position in operation handle 1 time produces high pressure liquid force feed, the high pressure liquid force feed in the A chamber of hydraulic motor 23
By hydraulic fluid port A2 and the oil-out of the first shuttle valve 21, act on the control of Y type 3-position 4-way pilot operated directional control valve 10
The control port K2 of liquefaction mouth K1, Y type 3-position 4-way pilot operated directional control valve 10 passes through the second shuttle valve 22 and hydraulic pressure
The B chamber of motor 23 or the B chamber of auxiliary hydraulic pressure pump/motor 24 are connected, due to the B chamber of hydraulic motor and auxiliary
The pressure helping the B chamber of hydraulic pump/motor 24 is the least, and Y type 3-position 4-way pilot operated directional control valve 10 is operated in a left side
Station, the output pressure signal b of pilot operated handle 11And b2All close to null value, the first two-bit triplet hydraulic control
Reversal valve 11 and the 3rd two-bit triplet pilot operated directional control valve 19 are operated in right working position, the second two-bit triplet liquid controlled reversing
Valve 12 and the 4th two-bit triplet pilot operated directional control valve 20 are operated in left station, the first hydraulic control one-way valve 17 and second
Hydraulic control one-way valve 18 the most reversely ends, and therefore the outlet pilot control pressure oil of pioneer pump 3 is through three four, Y type
Hydraulic fluid port P-A, the hydraulic fluid port P-A of the first two-bit triplet pilot operated directional control valve 11 of logical pilot operated directional control valve 10, the 4th liang
The hydraulic fluid port P-A of position threeway pilot operated directional control valve 20 acts on the control oil of M type 3-position 4-way pilot operated directional control valve 27
Mouth K2, and the control port K1 of M type 3-position 4-way pilot operated directional control valve 27 is through the 3rd two-bit triplet hydraulic control hydraulic control
The hydraulic fluid port A-T of reversal valve 19, hydraulic fluid port P-A, the Y type 3-position 4-way of the second two-bit triplet pilot operated directional control valve 12
The hydraulic fluid port B-T connected tank of pilot operated directional control valve 10, therefore M type 3-position 4-way pilot operated directional control valve 27 is operated in the right side
Station, the A chamber of the auxiliary hydraulic pressure pump/motor 24 hydraulic fluid port P-A by M type 3-position 4-way pilot operated directional control valve 27
Being connected with hydraulic accumulator 29, turntable 26 is operated in pump owing to continuing to rotarily drive auxiliary hydraulic pressure pump/motor 24
Pattern, carries out oil-filled to hydraulic accumulator 29, and hydraulic accumulator 29 is at auxiliary hydraulic pressure pump/motor 24 simultaneously
Two chambeies produce a pressure reduction, turntable 26 produce a plugging moment, it is achieved the braking procedure of turntable 26.
Meanwhile, the time lag produced by the first damping hole 13, M type 3-position 4-way pilot operated directional control valve
After 27 are operated in right working position, the first 2/2-way pilot operated directional control valve 15 is just operated in left station, it is achieved hydraulic pressure horse
Reach the off-load of the A cavity pressure of 23 so that the braking moment of turntable 26 is all by auxiliary hydraulic pressure pump/motor 24
There is provided, it is to avoid the braking kinetic energy consumption of turntable 26 is in the system of tradition turntable fluid motor-driven adjunct unit 9
Dynamic overflow valve (not shown), improves energy recovery efficiency.
2) throttling braking mode
When guide's manipulator's handle 1 gradually returns to middle position, its output pressure signal b1It is gradually reduced but is all higher than certain
Individual pilot pressure threshold value piTime, banked direction control valves 8 is not in middle position, and the hydraulic fluid port A-T of banked direction control valves 8 is not
Completely closing, turntable is in semi-brake pattern.The brake pressure in the A chamber of hydraulic motor 23 is by banked direction control valves 8
The aperture of hydraulic fluid port A-T is set up, and the aperture of the hydraulic fluid port A-T of banked direction control valves 8 is the least, the A chamber of hydraulic motor 23
Brake pressure the biggest, the braking moment of turntable 26 is the biggest, otherwise the aperture of the hydraulic fluid port A-T of banked direction control valves 8 is more
Greatly, the brake pressure in the A chamber of hydraulic motor 23 is the least, and the braking moment of turntable 26 is the least.
Now due to the output pressure signal b of pilot operated handle 12The b close to null value1More than pilot pressure threshold
Value pi, the first two-bit triplet pilot operated directional control valve the 11, the 3rd two-bit triplet pilot operated directional control valve 19 control port,
The control port of the first hydraulic control one-way valve 17 and pilot pressure signal b1Communicate, the first two-bit triplet liquid controlled reversing
The control port of valve 11 and the 3rd two-bit triplet pilot operated directional control valve 19 is operated in left station, the first hydraulic control one-way valve
17 reverse-conductings, the control port of the 5th two-bit triplet pilot operated directional control valve 32 and the A chamber phase of hydraulic motor 23
Even, owing to the A chamber of hydraulic motor 23 is high-pressure side, the 5th two-bit triplet pilot operated directional control valve 32 is operated in right work
Position,
Therefore the control port K1 of M type 3-position 4-way pilot operated directional control valve 27 is changed by the 3rd two-bit triplet hydraulic control
To the hydraulic fluid port P-A of valve 19, the 5th two-bit triplet pilot operated directional control valve 32 hydraulic fluid port A-T after be connected with fuel tank；And
The control port K2 of M type 3-position 4-way pilot operated directional control valve 27 is through the 4th two-bit triplet hydraulic control pilot operated directional control valve 20
Hydraulic fluid port P-A, the hydraulic fluid port A-T connected tank of the first two-bit triplet pilot operated directional control valve 11, therefore three four, M type
Logical pilot operated directional control valve 27 is operated in middle position, and M type 3-position 4-way liquid is passed through in the A chamber of auxiliary hydraulic pressure pump/motor 24
Control reversal valve 27 is directly connected with B chamber.
The above, only present pre-ferred embodiments, therefore the scope that the present invention implements can not be limited according to this,
The equivalence change i.e. made according to the scope of the claims of the present invention and description and modification, all should still belong to the present invention and contain
In the range of.
Claims (8)
1. the energy-saving turntable drive system of excavator based on double motor and hydraulic accumulator, it is characterised in that:
Including pilot operated handle, pioneer pump, variable pump, engine, banked direction control valves, Y type three-dimensional four-way liquid controlled reversing
Valve, the first damping hole, the second damping hole, the first 2/2-way pilot operated directional control valve, the second 2/2-way hydraulic control are changed
To valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve, the 3rd two-bit triplet pilot operated directional control valve, the 4th two
Threeway pilot operated directional control valve, the first shuttle valve, the second shuttle valve, hydraulic motor, auxiliary hydraulic pressure pump/motor, decelerator,
Turntable, M type 3-position 4-way pilot operated directional control valve, hydraulic accumulator, inverted flux control pressure sensing cell, the 5th
Two-bit triplet pilot operated directional control valve and the 6th two-bit triplet pilot operated directional control valve；
Wherein:
Engine, pioneer pump and variable pump are coaxially mechanically coupled, the oil-in connected tank of variable pump；Banked direction control valves
P mouth and P1 mouth are all connected with the oil-out of variable pump, the T mouth connected tank of banked direction control valves；The D mouth of banked direction control valves is with negative
Flow-control pressure sensing cell is connected；The A mouth of banked direction control valves at least divides four tunnels: the first via and the A of hydraulic motor
Chamber is connected, and the second tunnel is connected with the oil-in A2 of the first shuttle valve, the 3rd road and the 5th two-bit triplet liquid controlled reversing
The control port of valve is connected, and the first 2/2-way pilot operated directional control valve connected tank is passed through on the 4th tunnel；The B mouth of banked direction control valves
At least divide four tunnels: the first via is connected with the B chamber of hydraulic motor, the oil-in A2 phase of the second road and the second shuttle valve
Even, the 3rd tunnel is connected with the control port of the 6th two-bit triplet pilot operated directional control valve, and the 4th tunnel passes through the second two two
Logical pilot operated directional control valve connected tank；
Hydraulic motor, auxiliary hydraulic pressure pump/motor, decelerator and turntable are mechanically coupled；Auxiliary hydraulic pressure pump/motor
A chamber is connected with P mouth, the oil-in A1 of the first shuttle valve of M type three-dimensional four-way pilot operated directional control valve；Auxiliary hydraulic pressure
The B chamber of pump/motor is connected with the T mouth of M type 3-position 4-way pilot operated directional control valve, the oil-in A1 of the second shuttle valve；
The B mouth connected tank of M type 3-position 4-way pilot operated directional control valve, the A mouth of M type 3-position 4-way pilot operated directional control valve and liquid
Pressure accumulator is connected；
The oil-in of pioneer pump is connected with fuel tank, and the oil-out of pioneer pump at least divides four tunnels: the first via meets guide behaviour
Make the hydraulic fluid port P of handle；Second tunnel connects the B mouth of the first hydraulic control one-way valve, and the A mouth of the first hydraulic control one-way valve connects
The P mouth of five two-bit triplet pilot operated directional control valves, the T mouth connected tank of the 5th two-bit triplet pilot operated directional control valve, the 5th liang
The control port of position threeway pilot operated directional control valve meets the A chamber of hydraulic motor, the A of the 5th two-bit triplet pilot operated directional control valve
Mouthful it is connected with the P mouth of the 3rd two-bit triplet pilot operated directional control valve, the T mouth of the 3rd two-bit triplet pilot operated directional control valve and the
The A mouth of two two-bit triplet pilot operated directional control valves is connected, a hydraulic fluid port of the second damping hole is connected, the second damping hole
The control port of another hydraulic fluid port and the second 2/2-way pilot operated directional control valve is connected, the 3rd two-bit triplet liquid controlled reversing
The A mouth of valve is connected with the control port K1 of M type 3-position 4-way pilot operated directional control valve；3rd tunnel connects three four, Y type
The P mouth of logical pilot operated directional control valve, the T mouth connected tank of Y type 3-position 4-way pilot operated directional control valve, Y type 3-position 4-way liquid
The A mouth of control reversal valve and the P mouth of the first two-bit triplet pilot operated directional control valve are connected, the first two-bit triplet liquid controlled reversing
The T mouth connected tank of valve, the B mouth of Y type 3-position 4-way pilot operated directional control valve and the second two-bit triplet pilot operated directional control valve
P mouth is connected, the T mouth connected tank of the second two-bit triplet pilot operated directional control valve, Y type three-dimensional four-way pilot operated directional control valve
Two control port K1 with K2 respectively with the first shuttle valves, the oil-outs of the second shuttle valve are connected；4th tunnel connects second
The B mouth of hydraulic control one-way valve, the A mouth of the second hydraulic control one-way valve connects the P mouth of the 6th two-bit triplet pilot operated directional control valve,
The T mouth connected tank of the 6th two-bit triplet pilot operated directional control valve, the control port of the 6th two-bit triplet pilot operated directional control valve connects
The B chamber of hydraulic motor, the A mouth of the 6th two-bit triplet pilot operated directional control valve and the 4th two-bit triplet pilot operated directional control valve
T mouth is connected, the P mouth of the 4th two-bit triplet pilot operated directional control valve and the A mouth of the first two-bit triplet pilot operated directional control valve,
One hydraulic fluid port of the first damping hole is connected, another hydraulic fluid port of the first damping hole and the first 2/2-way liquid controlled reversing
The control port of valve is connected, the A mouth of the 4th two-bit triplet pilot operated directional control valve and M type 3-position 4-way liquid controlled reversing
The control port K2 of valve is connected；
The output pilot pressure signal b1 of pilot operated handle divides four tunnels to control: the first via connects the control of banked direction control valves
Hydraulic fluid port K2, the second tunnel connects the control port of the first two-bit triplet pilot operated directional control valve, and the 3rd tunnel connects the first fluid-control one-way
The control port of valve, the 4th tunnel connects the control port of the 3rd two-bit triplet pilot operated directional control valve；Pilot operated handle
Output pilot pressure signal b2 divides four tunnels to control: the first via meets the control port K1 of banked direction control valves, and the second tunnel connects the
The control port of two two-bit triplet pilot operated directional control valves, the 3rd tunnel connects the control port of the second hydraulic control one-way valve, and the 4th
Road connects the control port of the 4th two-bit triplet pilot operated directional control valve.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 1 drives
Dynamic system, it is characterised in that: also include the oil-out of other actuator driven systems, its oil-in and variable pump
It is connected.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 1 drives
Dynamic system, it is characterised in that: also include tradition turntable fluid motor-driven adjunct unit, the of banked direction control valves A mouth
Five tunnels connect tradition turntable fluid motor-driven adjunct unit, and the 5th tunnel of banked direction control valves B mouth connects tradition turntable hydraulic pressure horse
Reach driving adjunct unit.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 1 drives
Dynamic system, it is characterised in that: also including the first overflow valve, the 5th tunnel of the oil-out of described pioneer pump connects first
The oil-in of overflow valve, the oil-out connected tank of the first overflow valve.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 1 drives
Dynamic system, it is characterised in that: also including the second overflow valve, the oil-out of its oil-in link variable pump, it goes out
Hydraulic fluid port connected tank.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 1 drives
Dynamic system, it is characterised in that: also including the 3rd overflow valve, its oil-in connects M type 3-position 4-way liquid controlled reversing
The A mouth of valve, its oil-out connected tank.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 1 drives
Dynamic system, it is characterised in that: described inverted flux control pressure sensing cell includes the 3rd damping hole and the 4th overflow
Valve, a hydraulic fluid port of the 3rd damping hole is connected with the D mouth of banked direction control valves, another hydraulic fluid port connected tank, the 4th overflow
The oil-in of valve is connected with the D mouth of banked direction control valves, oil-out connected tank.
The energy-saving turntable of excavator based on double motor and hydraulic accumulator the most according to claim 2 drives
Dynamic system, it is characterised in that: other actuator driven systems described are swing arm drive system or dipper drive system
Or travel driving system.
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| CN104831774B (en) * | 2015-04-16 | 2017-07-07 | 湖南网大科技有限公司 | A kind of loading machine walking Brake energy recovery auxiliary drive and control method |
| CN105840598B (en) * | 2016-05-25 | 2017-08-25 | 华侨大学 | The drive system that a kind of engineering machinery turntable energy is recycled automatically |
| CN108755823A (en) * | 2018-07-05 | 2018-11-06 | 伊婕 | A kind of excavator with pressure difference liquid energy and potential energy recovery device |
| CN108915005B (en) * | 2018-07-09 | 2020-09-25 | 马鞍山市润启新材料科技有限公司 | Excavator movable arm compensation hydraulic system |
| CN108915009B (en) * | 2018-07-09 | 2021-04-16 | 德润液压科技（常州）有限公司 | Rotary hydraulic system of excavator |
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| EP0410053B1 (en) * | 1989-07-26 | 1993-11-03 | Kabushiki Kaisha Kobe Seiko Sho | Method of controlling the slewing operation of a slewing mechanism and a hydraulic control system for carrying out the same |
| JP2010121726A (en) * | 2008-11-20 | 2010-06-03 | Caterpillar Japan Ltd | Hydraulic control system in work machine |
| CN102828536B (en) * | 2012-09-18 | 2015-01-14 | 三一重机有限公司 | Excavator convergent flow control system and excavator |
| CN102889259B (en) * | 2012-09-20 | 2015-05-13 | 三一重工股份有限公司 | Multipath valve and engineering machinery |
| CN104088832B (en) * | 2013-08-14 | 2016-12-28 | 湖南万容科技股份有限公司 | A kind of disintegrating machine hydraulic system and disintegrating machine |
| CN204266285U (en) * | 2014-10-30 | 2015-04-15 | 华侨大学 | Based on the energy-saving turntable drive system of the excavator of double motor and hydraulic accumulator |
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Application publication date: 20150218 Assignee: Xiamen guoxineng Construction Machinery Co.,Ltd. Assignor: HUAQIAO University Contract record no.: X2024980005399 Denomination of invention: Energy saving turntable drive system for excavators based on dual motors and hydraulic accumulators Granted publication date: 20160817 License type: Exclusive License Record date: 20240520 |