CN106149795B - Excavator swing arm hydraulic control system - Google Patents
Excavator swing arm hydraulic control system Download PDFInfo
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- CN106149795B CN106149795B CN201610709512.4A CN201610709512A CN106149795B CN 106149795 B CN106149795 B CN 106149795B CN 201610709512 A CN201610709512 A CN 201610709512A CN 106149795 B CN106149795 B CN 106149795B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of excavator swing arm hydraulic control systems, with oil return opening it is connected including boom cylinder, three six-way transfer valves of pilot-operated type, handrail valve, branch vehicle reversal valve and with combined control valve, an actuator port B of the guiding valve Median Function of three six-way transfer valves of pilot-operated type；Two output oil port b1 of handrail valve are connected with two control ports of three six-way transfer valves of pilot-operated type respectively；Combined control valve includes pilot-operated type hydraulic control lock and pilot proportional reversing valve, and the control port of pilot-operated type hydraulic control lock and pilot proportional reversing valve is connected with the output oil port a1 of handrail valve；The oil inlet of pilot-operated type hydraulic control lock is connected by the rodless cavity of the actuator port B of three six-way transfer valves of respective check valve and pilot-operated type and respective corresponding boom cylinder, the oil outlet of pilot proportional reversing valve is connected by the rod chamber of the actuator port B of three six-way transfer valves of respective check valve and pilot-operated type and respective corresponding boom cylinder, and the actuator port A of three six-way transfer valves of pilot-operated type is connected with the rod chamber of boom cylinder；The present invention not only ensures that swing arm decline does not exceed the speed limit, and reduces energy consumption, elongate member service life, has the advantages that overall cost is low.
Description
Technical field
The present invention relates to a kind of hydraulic control systems for excavator swing arm.
Background technology
The swing arm hydraulic control system of large excavator need to realize three kinds of lifting of swing arm, decline and branch vehicle working conditions,
Wherein branch car state is to contact the scraper bowl of swing arm front end with ground, be passed through hydraulic oil to the rod chamber of boom cylinder again so that
Its piston rod band carries recycling, and excavator front end is propped, and is used for excavator across obstacle；Existing hydraulic control system passes through
Handrail valve control three six-way transfer valves of pilot-operated type drive boom cylinders action, to realize three kinds of lifting, decline and branch vehicle work
State；During swing arm declines, apparatus for work reaches tens tons of weight, usually also in the connection of boom cylinder rodless cavity oil
Road installation one-way throttle valve, by the damping of throttle valve, the very high return oil pressure of foundation carrys out anti-stopper arms decline hypervelocity and brings
Hidden danger, for example pound vehicle, complete machine unstability and swing arm or dipper crackle；But since fixed orifice size is difficult to meet to bear
The pressure change that the variation of lotus, the variation of operating radius are brought, conventional way is that throttling accomplishes as small as possible, to ensure swing arm
Decline does not exceed the speed limit, and in this case in order to obtain decrease speed that is very fast and stablizing, and need to apply in boom cylinder rod chamber and lead
Dynamic pressure or even active pressure reach 300bar, and a large amount of fevers, piston rod seal component thus will necessarily be brought to bear originally should not
The pressure born need to increase the heat radiation power and appearance and size of cooler, not only increase energy consumption, but also reduce component service life, comprehensive
It closes of high cost.
Invention content
The purpose of the present invention is being directed to deficiencies of the prior art, a kind of excavator swing arm hydraulic control system is provided
System, it can realize unpowered decline when declining state, not only ensure that swing arm decline does not exceed the speed limit, and reduce energy consumption, elongate member
Service life has the advantages that overall cost is low.
In order to achieve the above objectives, excavator swing arm hydraulic control system of the invention, including one or more boom cylinder,
Three six-way transfer valves of pilot-operated type, handrail valve；It is respectively right characterized by further comprising branch vehicle reversal valve and with every boom cylinder
The combined control valve answered, the actuator port B and oil return opening phase of the guiding valve Median Function of three six-way transfer valves of the pilot-operated type
Even；One control port of three six-way transfer valves of an output oil port b1 and pilot-operated type of handrail valve is connected, handrail valve it is another defeated
Oil outlet a1 is connected by another control port of three six-way transfer valves of branch vehicle reversal valve and pilot-operated type；Each combined control valve
Include the pilot-operated type hydraulic control lock and pilot proportional reversing valve being sequentially connected, pilot-operated type hydraulic control lock and pilot proportional reversing valve
Control port be connected with the output oil port a1 of handrail valve；Pilot-operated type hydraulic control lock oil inlet by respective check valve with
The actuator port B of three six-way transfer valves of pilot-operated type is connected, the oil inlet of pilot-operated type hydraulic control lock also with respective corresponding boom cylinder
Rodless cavity be connected, the oil outlet of pilot proportional reversing valve passes through respective check valve and three six-way transfer valves of pilot-operated type
Actuator port B be connected, the oil outlet of pilot proportional reversing valve also passes through respective check valve and respectively corresponding swing arm is oily
The rod chamber of cylinder is connected, and the rod chamber of another actuator port A and all boom cylinders of three six-way transfer valves of pilot-operated type are homogeneous
Even；
When work, three kinds of lifting of swing arm, decline and branch vehicle working conditions can be achieved in the present invention；When declining, operation is helped
Hand valve handle makes its output oil port a1 export pilot pressure oil, and branch vehicle reversal valve is disconnected, do not control pilot-operated type three six at this time
Logical reversal valve, the guiding valve of three six-way transfer valves of pilot-operated type are in middle position, and the rod chamber of boom cylinder is passed through without active pressure oil,
Pilot pressure oil controls the pilot-operated type hydraulic control lock opening of each boom cylinder and the guiding valve commutation of pilot proportional reversing valve, swing arm oil
The hydraulic oil of cylinder rodless cavity is divided into two-way after flowing through respective pilot-operated type hydraulic control lock and pilot proportional reversing valve, all the way through guide
The actuator port B, oil return opening of three six-way transfer valves of formula flow back to fuel tank, and another way flows into the rod chamber of boom cylinder, realizes and mends
Oily function not only avoids emptying phenomenon from occurring, generates cavitation erosion, damage cylinder interior part, also reduces that flow through pilot-operated type three six logical
The pressure loss of reversal valve, reduces system heat generation；The unpowered decline of boom cylinder piston rod can be achieved in the present invention, and main pump does not have
Promising decline provides power oil, reduces the torque of engine reality output, has saved fuel consumption, decreases the hair of system
Heat loss can reduce the heat radiation power and appearance and size of cooler；Driver can be according to the variation of load, operating radius, speed
Variation is judged that the amplitude of operation handrail valve handle, pilot proportional reversing valve adapt to establish and operation handle phase automatically by oneself
The aperture answered, orifice size change with pilot pressure and are changed, made in different decrease speeds, always in swing arm oil
Cylinder rodless cavity establishes equal safe pressure, and anti-stopper arms hypervelocity is in safety decline state always.
As a further improvement on the present invention, the branch vehicle reversal valve is solenoid directional control valve；Convenient for manipulating branch vehicle reversal valve；
As a further improvement on the present invention, the rodless cavity of the every boom cylinder also by respective overflow valve with it is right
The oil outlet of pilot proportional reversing valve is answered to be connected；When there is load abnormal, overflow valve is opened, in boom cylinder rodless cavity
Hydraulic oil flows back to fuel tank through three overflow valve, pilot-operated type six-way transfer valves, can protect boom cylinder and pilot proportional reversing valve；
As a further improvement on the present invention, the boom cylinder is two, three six-way transfer valves of the pilot-operated type
Another actuator port A is connected by shunting body with the rod chamber of two boom cylinders, the work of three six-way transfer valves of pilot-operated type
The check valve that hydraulic fluid port B is locked into hydraulic fluid port front end by shunting body with two pilot-operated type hydraulic controls is connected；It can realize that two is dynamic by two shunting bodies
The harmony of arm oil cylinder oil pressure in lifting and branch vehicle is conducive to the completion of action；
In conclusion the present invention can realize unpowered decline when declining state, not only ensure that swing arm decline does not exceed the speed limit, and
Energy consumption, elongate member service life are reduced, has the advantages that overall cost is low.
Description of the drawings
Fig. 1 is the hydraulic schematic diagram of the embodiment of the present invention.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the excavator swing arm hydraulic control system of the embodiment, including two boom cylinders 1, pilot-operated types
Three six-way transfer valves 2, handrail valve 3, branch vehicle reversal valve 4 and two combined control valve 5 corresponding with respective every boom cylinder 1,
One actuator port B of the guiding valve Median Function of three six-way transfer valves 2 of the pilot-operated type is connected with oil return inlet T 1；Branch vehicle reversal valve
4 be solenoid directional control valve, and a control port b2 of three six-way transfer valves 2 of an output oil port b1 and pilot-operated type of handrail valve 3 is connected,
Another control port a2 that another output oil port a1 of handrail valve 3 passes through branch vehicle reversal valve 4 and three six-way transfer valves 2 of pilot-operated type
It is connected；Two combined control valves 5 include that the pilot-operated type hydraulic control lock 6 being sequentially connected and pilot proportional reversing valve 7 and one are overflow
Valve 8 is flowed, the control port of pilot-operated type hydraulic control lock 6 and pilot proportional reversing valve 7 is connected with the output oil port a1 of handrail valve 3；
The oil inlet of two pilot-operated type hydraulic controls lock 6 passes through the three six logical commutations of respective check valve 9 and a shunting body 12 and pilot-operated type
The actuator port B of valve 2 is connected, the oil inlet of each pilot-operated type hydraulic control lock 6 also with the rodless cavity phase of respective corresponding boom cylinder 1
Even, in the oil inlet of each pilot-operated type hydraulic control lock 6 throttling is additionally provided with on the connecting line of respective corresponding boom cylinder rodless cavity
Valve；The oil outlet of two pilot proportional reversing valves 7 is logical by respective check valve 10 and shunting body 12 and pilot-operated type three six
The actuator port B of reversal valve 2 is connected, the oil outlets of two pilot proportional reversing valves 7 also by respective check valve 11 with it is each
Be connected from the rod chamber of corresponding boom cylinder 1, the rodless cavity of every boom cylinder 1 also by the respective overflow valve 8 with it is right
The oil outlet of pilot proportional reversing valve 7 is answered to be connected, another actuator port A of three six-way transfer valves 2 of pilot-operated type passes through shunting
Body 13 is connected with the rod chamber of two boom cylinders 1；
Working principle of the present invention is as follows：
1）Moved arm lifting：The handle of operation handrail valve 3 makes its output oil port b1 export pilot pressure oil, pilot pressure oil
Into three six-way transfer valves 2 of pilot-operated type control port b2, push its guiding valve move, three six-way transfer valves 3 of pilot-operated type
Oil inlet P 1 and actuator port B is connected, the pressure oil that main pump comes through shunting body 12, push two check valves 9 open and enter two boom cylinders 1
Rodless cavity, push piston rod stretch out, realize lifting；
2）Swing arm declines：The handle of operation handrail valve 3 makes its output oil port a1 export pilot pressure oil, and branch vehicle changes at this time
Disconnect to valve 4, do not control three six-way transfer valves 2 of pilot-operated type and act, during the guiding valves of three six-way transfer valves 2 of pilot-operated type is in
Position, the rod chamber of boom cylinder 1 are passed through without active pressure oil, and pilot pressure oil controls the pilot-operated type liquid of two boom cylinders 1 at this time
Control lock 6 is opened and the commutation of the guiding valve of pilot proportional reversing valve 7, and the hydraulic oil in 1 rodless cavity of boom cylinder flows through respective elder generation
It is divided into two-way after conduction hydraulic control lock 6 and pilot proportional reversing valve 7, pushes check valve 10 open all the way, through shunting body 12, pilot-operated type three
The actuator port B of position six-way transfer valve 2, oil return inlet T 1 flow back to fuel tank, and another way pushes check valve 11 open, flows into boom cylinder 1
Rod chamber realizes repairing function, realizes and declines；This process not only avoids the rod chamber emptying phenomenon of boom cylinder 1 from occurring, generate
Cavitation erosion, damage cylinder interior part, also reduce the pressure loss for flowing through three six-way transfer valves 2 of pilot-operated type, reduce system heat generation；
3）Swing arm branch vehicle：3 handle of operation handrail valve makes its output oil port a1 export pilot pressure oil, while manipulating branch vehicle
Reversal valve 4 is connected, and pilot pressure oil pushes the guiding valve reverse movement of three six-way transfer valves 2 of pilot-operated type, pilot-operated type three six logical
The oil inlet P 1 of reversal valve 2 is connected with actuator port A, and the pressure oil that main pump comes enters having for two boom cylinders 1 through shunting body 13
Rod cavity pushes its piston rod to recycle, while pilot pressure oil also controls 6 opening of pilot-operated type hydraulic control lock and the elder generation of two boom cylinders 1
The guiding valve of conduction proportional reversing valve 7 commutates, and the hydraulic oil in 1 rodless cavity of boom cylinder flows through respective pilot-operated type hydraulic control and locks 6 Hes
7 pusher opening one-way valve 10 of pilot proportional reversing valve, through shunting body 12, three six-way transfer valves 2 of pilot-operated type actuator port B,
Oil return inlet T 1 flows back to fuel tank（The pressure oil that check valve 11 is come by main pump at this time is closed）, realize that the band of piston rod carries recycling, carry out
Branch vehicle；
The present invention can be achieved the unpowered decline of boom cylinder piston rod, and main pump does not provide power oil when decline, reduces
The torque of engine reality output, has saved fuel consumption, decreases the heat producing losses of system, can be cooling in reduction system
The heat radiation power and appearance and size of device；Driver can be judged to grasp according to the variation of load, the variation of operating radius, speed by oneself
Make the amplitude of 3 handle of handrail valve, pilot proportional reversing valve 7 adapts to establish aperture corresponding with operation handle, throttling automatically
Area changes with pilot pressure and is changed, and makes in different decrease speeds, establishes phase in boom cylinder rodless cavity always
Deng safe pressure, anti-stopper arms hypervelocity is in safety and declines state always.
When there is load abnormal, overflow valve 8 is opened, and the hydraulic oil in 1 rodless cavity of boom cylinder is through overflow valve 8, unidirectional
Three valve 10, shunting body 12, pilot-operated type six-way transfer valves 2 flow back to fuel tank, can protect boom cylinder 1 and pilot proportional reversing valve
7 are not damaged；
Oil pressure when throttle valve may make two boom cylinders 1 to lift is almost the same, realizes the synchronism of lifting；
The harmony of two boom cylinders 1 oil pressure in lifting and branch vehicle can be realized by two shunting bodies 12,13, be conducive to action
Completion；
The present invention is not limited to the above embodiments, such as quantity of boom cylinder to be varied with, such as without automatic control
Other reversal valves can also be used in the requirement of system, branch vehicle reversal valve.
Claims (4)
1. a kind of excavator swing arm hydraulic control system, including one or more boom cylinder, three six-way transfer valves of pilot-operated type,
Handrail valve；Characterized by further comprising branch vehicle reversal valve and with the corresponding combined control valve of every boom cylinder, the elder generation
One actuator port B of the guiding valve Median Function of three six-way transfer valves of conduction is connected with oil return opening；One output oil port of handrail valve
B1 is connected with a control port of three six-way transfer valves of pilot-operated type, and another output oil port a1 of handrail valve passes through branch vehicle reversal valve
It is connected with another control port of three six-way transfer valves of pilot-operated type；Each combined control valve includes the pilot-operated type being sequentially connected
Hydraulic control lock and pilot proportional reversing valve, the control port of pilot-operated type hydraulic control lock and pilot proportional reversing valve with handrail valve
Output oil port a1 is connected；The oil inlet of pilot-operated type hydraulic control lock passes through respective check valve and three six-way transfer valves of pilot-operated type
Actuator port B is connected, and the oil inlet of pilot-operated type hydraulic control lock is also connected with the rodless cavity of respective corresponding boom cylinder, pilot proportional
The oil outlet of reversal valve is connected by the actuator port B of three six-way transfer valves of respective check valve and pilot-operated type, pilot-operated type
The oil outlet of proportional reversing valve is also connected by respective check valve with the rod chamber of respective corresponding boom cylinder, pilot-operated type three
Another actuator port A of position six-way transfer valve is connected with the rod chamber of all boom cylinders.
2. excavator swing arm hydraulic control system as described in claim 1, it is characterised in that the branch vehicle reversal valve is electromagnetism
Reversal valve.
3. excavator swing arm hydraulic control system as described in claim 1, it is characterised in that the nothing of the every boom cylinder
Rod cavity is also connected by respective overflow valve with the oil outlet of corresponding pilot proportional reversing valve.
4. the excavator swing arm hydraulic control system as described in claims 1 to 3 is any, it is characterised in that the boom cylinder is
Two, another actuator port A of three six-way transfer valves of the pilot-operated type is equal by the rod chamber of shunting body and two boom cylinders
It is connected, the actuator port B of three six-way transfer valves of pilot-operated type is locked into the list of hydraulic fluid port front end by shunting body and two pilot-operated type hydraulic controls
It is connected to valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610709512.4A CN106149795B (en) | 2016-08-24 | 2016-08-24 | Excavator swing arm hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610709512.4A CN106149795B (en) | 2016-08-24 | 2016-08-24 | Excavator swing arm hydraulic control system |
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| Publication Number | Publication Date |
|---|---|
| CN106149795A CN106149795A (en) | 2016-11-23 |
| CN106149795B true CN106149795B (en) | 2018-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610709512.4A Active CN106149795B (en) | 2016-08-24 | 2016-08-24 | Excavator swing arm hydraulic control system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6915042B2 (en) * | 2017-03-10 | 2021-08-04 | 住友建機株式会社 | Excavator |
| CN110566531B (en) * | 2019-10-16 | 2024-03-15 | 湖南鸿辉科技有限公司 | Hydraulic control reversing valve for controlling multiple oil ways |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091065A (en) * | 2005-06-06 | 2007-12-19 | 新履带牵引车三菱有限公司 | Fluid pressure circuit, energy recovery device, and fluid pressure recovery circuit for working machine |
| CN105683451A (en) * | 2013-10-30 | 2016-06-15 | 沃尔沃建造设备有限公司 | Hydraulic system of construction equipment, having float function |
| CN206034529U (en) * | 2016-08-24 | 2017-03-22 | 四川邦立重机有限责任公司 | Excavator swing arm hydraulic control system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4509877B2 (en) * | 2005-06-29 | 2010-07-21 | キャタピラージャパン株式会社 | Hybrid system for work machines |
| US7444809B2 (en) * | 2006-01-30 | 2008-11-04 | Caterpillar Inc. | Hydraulic regeneration system |
-
2016
- 2016-08-24 CN CN201610709512.4A patent/CN106149795B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091065A (en) * | 2005-06-06 | 2007-12-19 | 新履带牵引车三菱有限公司 | Fluid pressure circuit, energy recovery device, and fluid pressure recovery circuit for working machine |
| CN105683451A (en) * | 2013-10-30 | 2016-06-15 | 沃尔沃建造设备有限公司 | Hydraulic system of construction equipment, having float function |
| CN206034529U (en) * | 2016-08-24 | 2017-03-22 | 四川邦立重机有限责任公司 | Excavator swing arm hydraulic control system |
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| Publication number | Publication date |
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| CN106149795A (en) | 2016-11-23 |
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