CN106762927A - Electromechanical organisation of working with backhaul decompression function - Google Patents
Electromechanical organisation of working with backhaul decompression function Download PDFInfo
- Publication number
- CN106762927A CN106762927A CN201611139341.2A CN201611139341A CN106762927A CN 106762927 A CN106762927 A CN 106762927A CN 201611139341 A CN201611139341 A CN 201611139341A CN 106762927 A CN106762927 A CN 106762927A
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- Prior art keywords
- control unit
- upper cylinder
- state
- backhaul
- cylinder
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- 230000006837 decompression Effects 0.000 title claims abstract description 18
- 239000003921 oil Substances 0.000 claims abstract description 56
- 239000002828 fuel tank Substances 0.000 claims abstract description 29
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 abstract description 20
- 238000012856 packing Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 10
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
-
- 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
-
- 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
- F15B13/024—Pressure relief valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of electromechanical organisation of working with backhaul decompression function, including：Upper cylinder and lower oil cylinder；Hydraulic pump；Fuel tank；First control unit；Second control unit；3rd control unit；Backhaul pressure relief mechanism.Upper cylinder can be controlled to realize by the first control unit, the second control unit, the 3rd control unit and the 4th control unit：Idle stroke action, feed motion, packing state and backhaul action；Lower oil cylinder can be controlled to realize：Stretch out and backhaul action.Opening and closing of the backhaul pressure relief mechanism in the rodless cavity of upper cylinder and the fuel tank according to the Stress control of the hydraulic oil in rod chamber in the upper cylinder, and the hydraulic pump draining according to the Stress control of the hydraulic oil in rodless cavity.
Description
Technical field
The present invention relates to electromechanical integration technology area, more particularly to a kind of electromechanical processing machine with backhaul decompression function
Structure.
Background technology
Stamped workpieces are a kind of processing modes of workpiece, and the form of stamped workpieces has two kinds in the prior art, and one is to use
Machine driving as power form, two is form of the hydraulic drive as power；Using hydraulic drive rushing as power
In bed, punch rod is the piston rod of hydraulic jack, generally comprises upper and lower two oil cylinders, and upper cylinder is the major oil of stamped workpieces
Cylinder, lower oil cylinder is the secondary oil cylinder of stamped workpieces, and upper cylinder has following mechanism action：Close to workpiece idle stroke action, enter
To action, pressurize action and backhaul action, lower oil cylinder has the action for moving up and down.
However, the hydraulic system for controlling upper cylinder of the prior art can not make upper cylinder idle stroke act with
Feed motion is separated, that is to say, that in idle stroke action and feed motion, the pressure that piston rod is provided is that identical (is
Process velocity is provided, the movement velocity of idle stroke action request piston rod is fast, and pressure is small, and feed motion requirement piston rod
Movement velocity is slow, and pressure is big).Therefore, the processing efficiency of punch press is have impact on, and accelerates the loss of control element simultaneously.
The content of the invention
For above-mentioned technical problem present in existing technology, of the invention implementing has backhaul pressure release work(there is provided a kind of
The electromechanical organisation of working of energy.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of electromechanical organisation of working with backhaul decompression function, including：
Upper cylinder and lower oil cylinder, the piston rod of the upper cylinder down, the upper cylinder have make its piston rod unloaded to
The first state of lower motion, its piston rod is loaded the second state for moving downward and its piston rod is loaded and is kept quiet
The third state only and make the 4th state of its piston rod backhaul；Upward, the lower oil cylinder has the piston rod of the lower oil cylinder
Having makes its piston rod first state of motion and the second state for moving downward its piston rod upwards；
Hydraulic pump, it is used to be that the upper cylinder and the lower oil cylinder provide hydraulic oil；
Fuel tank, it is used to provide hydraulic oil for the hydraulic pump or reclaims the hydraulic pressure of the upper cylinder and the lower oil cylinder
Oil；
First control unit, it is the oil supply cylinder that oils that it is used to control hydraulic pump, and first control unit has to be made
The hydraulic pump connects with the fuel tank and while makes first position that the rod chamber and rodless cavity of the upper cylinder block, makes
The hydraulic pump is the rodless cavity fuel feeding of the upper cylinder and while the rod chamber of the upper cylinder is connected with the fuel tank
The second place and make rod chamber fuel feeding that the hydraulic pump is the upper cylinder and while make the rodless cavity of the upper cylinder with
3rd position of the fuel tank connection；
Second control unit, it is used to control hydraulic pump for the lower oil cylinder fuel feeding, and second control unit is arranged at
Between first control unit and the rod chamber of the upper cylinder, second control unit includes the first check valve and second
Check valve, the import of first check valve is connected with first control unit, and it exports the rod chamber with the upper cylinder
Connection；The import of second check valve is connected with the rod chamber of the upper cylinder, and its outlet connects with first control unit
It is logical, wherein, second check valve also has a control mouth, and the control mouth has makes the second check valve one-way conduction
Second state of first state and two-way admittance；
3rd control unit, it is arranged between the control mouth of the hydraulic pump and second check valve, and the described 3rd
Control unit has the first position that makes second check valve be in first state and second check valve is in the
The second place of two-state；Wherein：
4th control unit, it is used to control the lower oil cylinder to switch between its first state and second state；
Wherein：
When first control unit switches to the second place, the 3rd control unit switches to the second place, institute
State upper cylinder and be in first state；First control unit switches to the second place, the 3rd control unit and switches to
During one position, the upper cylinder is in the second state；First control unit switches to first position, the 3rd control list
When unit switches to first position, the upper cylinder is in the third state；First control unit switches to the 3rd position, described
When 3rd control unit switches to first position, the upper cylinder is in the 4th state；
Backhaul pressure relief mechanism, its upper cylinder according to the Stress control of the hydraulic oil in rod chamber in the upper cylinder
Opening and closing in rodless cavity and the fuel tank, and the hydraulic pump draining according to the Stress control of the hydraulic oil in rodless cavity.
Preferably, the 4th control unit is arranged between first control unit and the lower oil cylinder, when described
When first control unit switches to first position, the 4th control unit is turned on the hydraulic pump, and the 4th control is single
Unit has rod chamber and the rodless cavity first position blocked for making the lower oil cylinder, the rod chamber and fuel tank that make the lower oil cylinder
Connection and make rodless cavity and the second place that the hydraulic pump is connected simultaneously, the rodless cavity of the lower oil cylinder is connected with fuel tank
And make the 3rd position that rod chamber connects with the hydraulic pump simultaneously.
Preferably, it is connected on the fluid pressure line between first control unit and the rodless cavity of the upper cylinder and sets
The import for having the 3rd check valve, the 3rd check valve is connected with first control unit, the outlet of the 3rd check valve
Rodless cavity with the upper cylinder is connected.
Preferably, pressure-reducing valve and two are provided with the fluid pressure line between the hydraulic pump and the 3rd control unit
Two way selected valve, wherein, when first control unit is in the second place, the bi-bit bi-pass reversal valve conducting.
Preferably, first control unit is three-position four-way electromagnetic directional valve.
Preferably, the 3rd control unit is two-position four-way solenoid directional control valve.
Preferably, the 4th control unit is three-position four-way electromagnetic directional valve.
Preferably, the spring for pushing against its inner spool is provided with first check valve, so that described first is unidirectional
Valve is opened under a certain pressure.
Compared with prior art, the beneficial effect of the electromechanical organisation of working with backhaul decompression function of the invention is：It is logical
Crossing the first control unit, the second control unit, the 3rd control unit and the 4th control unit can control upper cylinder to realize：It is empty
Stroke action, feed motion, packing state and backhaul action；Lower oil cylinder can be controlled to realize：Stretch out and backhaul action.Backhaul
The pressure relief mechanism rodless cavity of upper cylinder and oil according to the Stress control of the hydraulic oil in rod chamber in the upper cylinder
Opening and closing in case, and the hydraulic pump draining according to the Stress control of the hydraulic oil in rodless cavity.
Brief description of the drawings
Fig. 1 is the structural representation of the electromechanical organisation of working with backhaul decompression function of the invention.
In figure：
10- hydraulic pumps；20- upper cylinders；Oil cylinder under 30-；40- fuel tanks；The control units of 50- first；60- second controls list
Unit；The check valves of 61- first；The check valves of 62- second；The control units of 70- the 3rd；The control units of 80- the 4th；90- bi-bit bi-pass is changed
To valve；100- pressure-reducing valves；The check valves of 110- the 3rd；The check valves of 120- the 4th；130- pilot operated directional control valves；140- liquid control pressure releasing valves.
Specific embodiment
To make those skilled in the art be better understood from technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
As shown in Figure 1 The embodiment provides a kind of electromechanical organisation of working with backhaul decompression function, it is used for
Stamped workpieces, the electromechanical organisation of working that should have backhaul decompression function is applied to punch press, and the electromechanics with backhaul decompression function adds
Work mechanism includes：Upper cylinder 20 and lower oil cylinder 30, down, the upper cylinder 20 has makes it live to the piston rod of the upper cylinder 20
First state that stopper rod zero load is moved downward, its piston rod is loaded the second state for moving downward and add its piston rod
Carry and the third state of remains stationary and make the 4th state of its piston rod backhaul；The piston rod of the lower oil cylinder 30 upward,
The lower oil cylinder 30 has makes its piston rod first state of motion and the second state for moving downward its piston rod upwards；
Hydraulic pump 10, it is used to be that the upper cylinder 20 and the lower oil cylinder 30 provide hydraulic oil；Fuel tank 40, it is used to be the hydraulic pressure
Pump 10 provides hydraulic oil or reclaims the hydraulic oil of the upper cylinder 20 and the lower oil cylinder 30；First control unit 50, it is used for
Control hydraulic pump 10 is the fuel feeding of the upper cylinder 20, and first control unit 50 has makes the hydraulic pump 10 with the fuel tank
40 connections simultaneously make first position that the rod chamber and rodless cavity of the upper cylinder 20 block, make the hydraulic pump 10 be institute simultaneously
State upper cylinder 20 rodless cavity fuel feeding and while make the second place that the rod chamber of the upper cylinder 20 connects with the fuel tank 40,
And make the hydraulic pump 10 for the rod chamber fuel feeding of the upper cylinder 20 and while make the rodless cavity of the upper cylinder 20 and institute
State the 3rd position of the connection of fuel tank 40；Second control unit 60, it is used to control hydraulic pump 10 for the fuel feeding of lower oil cylinder 30, institute
State the second control unit 60 to be arranged between first control unit 50 and the rod chamber of the upper cylinder 20, second control
Unit processed 60 includes the first check valve 61 and the second check valve 62, and the import of first check valve 61 is single with the described first control
Unit 50 is connected, and its outlet is connected with the rod chamber of the upper cylinder 20；The import of second check valve 62 and the upper cylinder
20 rod chamber connection, its outlet is connected with first control unit 50, wherein, second check valve 62 also has a control
Donsole, the control mouth has makes the first state of the one-way conduction of the second check valve 62 and the second state of two-way admittance；
3rd control unit 70, it is arranged between the control mouth of the hydraulic pump 10 and second check valve 62, the 3rd control
Unit processed 70 is with the first position for making second check valve 62 in first state and makes at second check valve 62
In the second place of the second state；Wherein：4th control unit 80, its be used to controlling the lower oil cylinder 30 in its first state and
Switch between second state；Wherein：When first control unit 50 switches to the second place, the 3rd control unit
70 when switching to the second place, and the upper cylinder 20 is in first state；First control unit 50 switch to the second place,
When 3rd control unit 70 switches to first position, the upper cylinder 20 is in the second state；First control unit
50 switch to first position, the 3rd control unit 70 when switching to first position, and the upper cylinder 20 is in the third state；
It is described to oil when first control unit 50 switches to the 3rd position, the 3rd control unit 70 and switches to first position
Cylinder 20 is in the 4th state；Backhaul pressure relief mechanism, its Stress control according to the hydraulic oil in rod chamber in the upper cylinder 20
Opening and closing in the rodless cavity of the upper cylinder 20 and the fuel tank 40, and according to the Stress control of the hydraulic oil in rodless cavity
The draining of hydraulic pump 10.
Understood according to above-mentioned, by the first control unit 50, the second control unit 60, the 3rd control unit 70 and the 4th
Control unit 80 can control upper cylinder 20 to realize：Idle stroke action, feed motion, packing state and backhaul action；Can
The lower oil cylinder 30 of control is realized：Stretch out and backhaul action.I.e.：When first control unit 50 switches to the second place, described
When three control units 70 switch to the second place, the upper cylinder 20 carries out idle stroke action；First control unit 50 is cut
When shifting to the second place, the 3rd control unit 70 and switching to first position, the upper cylinder 20 is in feed motion；It is described
When first control unit 50 switches to first position, the 3rd control unit 70 and switches to first position, the upper cylinder 20
In packing state；First control unit 50 switches to the 3rd position, the 3rd control unit 70 and switches to first
When putting, the upper cylinder 20 carries out backhaul action.
In a preferred embodiment of the invention, the 4th control unit 80 is arranged at first control unit 50
And the lower oil cylinder 30 between, when first control unit 50 switches to first position, the 4th control unit 80 with
The hydraulic pump 10 is turned on, and the 4th control unit 80 has makes what the rod chamber and rodless cavity of the lower oil cylinder 30 were blocked
First position, the rod chamber of the lower oil cylinder 30 is connected with fuel tank 40 and while rodless cavity is connected with the hydraulic pump 10
The second place, the rodless cavity of the lower oil cylinder 30 is connected with fuel tank 40 and while rod chamber is connected with the hydraulic pump 10
The 3rd logical position.In this way, stretching out or backhaul for lower oil cylinder 30 can be controlled by controlling the 4th control unit 80.
As further selection, the liquid between first control unit 50 and the rodless cavity of the upper cylinder 20 is connected to
The 3rd check valve 110 is provided with pressure pipe road, the import of the 3rd check valve 110 is connected with first control unit 50,
The outlet of the 3rd check valve 110 is connected with the rodless cavity of the upper cylinder 20.
As further selection, it is provided with the fluid pressure line between the hydraulic pump 10 and the 3rd control unit 70
Pressure-reducing valve 100 and bi-bit bi-pass reversal valve 90, wherein, when first control unit 50 is in the second place, described two
Two way selected valve 90 is turned on.
Used as further selection, first control unit 50 is three-position four-way electromagnetic directional valve.
Used as further selection, the 3rd control unit 70 is two-position four-way solenoid directional control valve.
Used as further selection, the 4th control unit 80 is three-position four-way electromagnetic directional valve.
As further selection, the spring for pushing against its inner spool is provided with first check valve 61, so that institute
The first check valve 61 is stated to open under a certain pressure.
In a preferred embodiment of the invention, the backhaul pressure relief mechanism includes the 4th check valve 120, liquid controlled reversing
Valve 130 and liquid control pressure releasing valve 140, the 4th check valve 120 are arranged at the rodless cavity and the fuel tank of the upper cylinder 20
Between 40, the import of the 4th check valve 120 is connected with the fuel tank 40, and its outlet connects with the rodless cavity of the upper cylinder 20
It is logical, control mouth is additionally provided with the 4th check valve 120, the control mouth is connected with the fluid pressure line on hydraulic pump 10；Institute
Pilot operated directional control valve 130 is stated with a control mouth, the control mouth is connected with the rodless cavity of upper cylinder 20, the pilot operated directional control valve
130 oil inlet is connected with the fluid pressure line of hydraulic pump 10, liquid control pressure releasing valve 140 have a control mouth, the control mouth with change
Connected to the working hole of valve, the oil inlet of liquid control pressure releasing valve 140 connects with the fluid pressure line on hydraulic pump 10, oil-out and fuel tank
40 connections, the initial position of pilot operated directional control valve 130 is to close, and commutation pressure in the control mouth of pilot operated directional control valve 130 is more than
The opening pressure of the 4th check valve 120.In this way, when upper cylinder 20 is in the backhaul action of the 4th state, when on hydraulic pump 10
The pressure of fluid pressure line more than the 4th check valve 120 opening pressure, and less than pilot operated directional control valve 130 commutation pressure when, liquid
The pressure of the hydraulic oil that press pump 10 is provided causes that the 4th check valve 120 is opened, so that the liquid in the rodless cavity of upper cylinder 20
Force feed flows into fuel tank 40, and upper cylinder 20 realizes backhaul, and when the hydraulic pressure on the fluid pressure line of hydraulic pump 10 is unidirectional less than the 4th
During the opening pressure of valve 120, the 4th check valve 120 is closed, and the pressure of the hydraulic oil in the rod chamber of upper cylinder 20 is gradually stepped up,
Until after bringing up to the pressure of the restriction of the 4th check valve 120, upper cylinder 20 continues backhaul；But when the hydraulic pressure that hydraulic pump 10 is provided
Oil pressure not only more than the 4th check valve 120 opening pressure, and more than pilot operated directional control valve 130 commutation pressure when, explanation
The amount of the oil return box 40 of the hydraulic oil in the rodless cavity of upper cylinder 20 is less than the oil inlet quantity of the hydraulic oil in rod chamber, so that easily
Impact is produced, to avoid this impact, the hydraulic oil in the fluid pressure line of hydraulic pump 10 causes that pilot operated directional control valve 130 is opened, liquid
The hydraulic oil that press pump 10 is provided is partly into the rod chamber of upper cylinder 20, a part of from the backflow fuel tank of liquid control pressure releasing valve 140
40, so that the amount of the hydraulic oil of turnover keeps balance in upper cylinder 20, the backhaul from piston rod is more steady.
Above example is only exemplary embodiment of the invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can do in essence of the invention and protection domain to the utility model
Go out various modifications or equivalent, this modification or equivalent also should be regarded as being within the scope of the present invention.
Claims (8)
1. a kind of electromechanical organisation of working with backhaul decompression function, it is characterised in that including：
Upper cylinder and lower oil cylinder, down, the upper cylinder has makes the unloaded fortune downwards of its piston rod to the piston rod of the upper cylinder
Dynamic first state, its piston rod is loaded the second state for moving downward and its piston rod is loaded and remains stationary
The third state and make the 4th state of its piston rod backhaul；Upward, the lower oil cylinder has to be made the piston rod of the lower oil cylinder
The first state of the upward motion of its piston rod and the second state for moving downward its piston rod；
Hydraulic pump, it is used to be that the upper cylinder and the lower oil cylinder provide hydraulic oil；
Fuel tank, it is used to provide hydraulic oil for the hydraulic pump or reclaims the hydraulic oil of the upper cylinder and the lower oil cylinder；
First control unit, it is the oil supply cylinder that oils that it is used to control hydraulic pump, and first control unit is described with making
Hydraulic pump connected with the fuel tank and while make first position that the rod chamber and rodless cavity of the upper cylinder block, make it is described
Hydraulic pump is the rodless cavity fuel feeding of the upper cylinder and while makes second that the rod chamber of the upper cylinder connects with the fuel tank
Position and make rod chamber fuel feeding that the hydraulic pump is the upper cylinder and while make the rodless cavity of the upper cylinder with it is described
3rd position of fuel tank connection；
Second control unit, it is used to control hydraulic pump for the lower oil cylinder fuel feeding, and second control unit is arranged at described
Between the rod chamber of the first control unit and the upper cylinder, second control unit is unidirectional including the first check valve and second
Valve, the import of first check valve is connected with first control unit, and its outlet is connected with the rod chamber of the upper cylinder；
The import of second check valve is connected with the rod chamber of the upper cylinder, and its outlet is connected with first control unit, its
In, second check valve also has a control mouth, and the control mouth has makes the first of the second check valve one-way conduction
Second state of state and two-way admittance；
3rd control unit, it is arranged between the control mouth of the hydraulic pump and second check valve, the 3rd control
Unit is with the first position for making second check valve in first state and second check valve is in the second shape
The second place of state；Wherein：
4th control unit, it is used to control the lower oil cylinder to switch between its first state and second state；Wherein：
When first control unit switches to the second place, the 3rd control unit switches to the second place, it is described on
Oil cylinder is in first state；First control unit switches to the second place, the 3rd control unit and switches to first
When putting, the upper cylinder is in the second state；First control unit switches to first position, the 3rd control unit and cuts
When shifting to first position, the upper cylinder is in the third state；First control unit switches to the 3rd position, the described 3rd
When control unit switches to first position, the upper cylinder is in the 4th state；
Backhaul pressure relief mechanism, its according to the Stress control of the hydraulic oil in rod chamber in the upper cylinder upper cylinder without bar
Opening and closing in chamber and the fuel tank, and the hydraulic pump draining according to the Stress control of the hydraulic oil in rodless cavity.
2. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that the 4th control
Unit processed is arranged between first control unit and the lower oil cylinder, when first control unit switches to first position
When, the 4th control unit is turned on the hydraulic pump, and the 4th control unit has makes the rod chamber of the lower oil cylinder
The first position blocked with rodless cavity, the rod chamber for making the lower oil cylinder connected with fuel tank and while make rodless cavity with it is described
Hydraulic pump connection the second place, the rodless cavity of the lower oil cylinder is connected with fuel tank and while make rod chamber with the hydraulic pressure
3rd position of pump connection.
3. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that be connected to described
The 3rd check valve is provided with fluid pressure line between the rodless cavity of the first control unit and the upper cylinder, the described 3rd is unidirectional
The import of valve is connected with first control unit, and the outlet of the 3rd check valve is connected with the rodless cavity of the upper cylinder.
4. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that the hydraulic pump
Pressure-reducing valve and bi-bit bi-pass reversal valve are provided with the fluid pressure line between the 3rd control unit, wherein, when described
When one control unit is in the second place, the bi-bit bi-pass reversal valve conducting.
5. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that first control
Unit processed is three-position four-way electromagnetic directional valve.
6. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that the 3rd control
Unit processed is two-position four-way solenoid directional control valve.
7. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that the 4th control
Unit processed is three-position four-way electromagnetic directional valve.
8. the electromechanical organisation of working with backhaul decompression function according to claim 1, it is characterised in that described first is single
To the spring being provided with valve for pushing against its inner spool, so that first check valve is opened under a certain pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611139341.2A CN106762927A (en) | 2016-12-12 | 2016-12-12 | Electromechanical organisation of working with backhaul decompression function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611139341.2A CN106762927A (en) | 2016-12-12 | 2016-12-12 | Electromechanical organisation of working with backhaul decompression function |
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| CN106762927A true CN106762927A (en) | 2017-05-31 |
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| CN201611139341.2A Pending CN106762927A (en) | 2016-12-12 | 2016-12-12 | Electromechanical organisation of working with backhaul decompression function |
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Application publication date: 20170531 |