CN206034529U - Excavator swing arm hydraulic control system - Google Patents
Excavator swing arm hydraulic control system Download PDFInfo
- Publication number
- CN206034529U CN206034529U CN201620926027.8U CN201620926027U CN206034529U CN 206034529 U CN206034529 U CN 206034529U CN 201620926027 U CN201620926027 U CN 201620926027U CN 206034529 U CN206034529 U CN 206034529U
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Abstract
The utility model discloses an excavator swing arm hydraulic control system, including boom cylinder, six logical switching -over valves of guide's formula tribit, holding up hand valve, a car switching -over valve to reach and the combination control valve, the actuator port B that guide's formula tribit six leads to the guiding valve meso -position function of switching -over valves links to each other with the oil return opening, hold up hand valve's two output hydraulic fluid port b1 continuous with two control ports of six logical switching -over valves of guide's formula tribit respectively, the combination control valve all includes guide's formula liquid accuse lock and guide's formula proportion switching -over valve, and the control port of guide's formula liquid accuse lock and guide's formula proportion switching -over valve all links to each other with the output hydraulic fluid port a1 who holds up hand valve, the oil inlet of guide's formula liquid accuse lock all leads to the actuator port B of switching -over valves through respective check valve and guide's formula tribit six and each selfcorresponding boom cylinder's no pole chamber links to each other, and the oil -out of guide's formula proportion switching -over valve all leads to the actuator port B of switching -over valves through respective check valve and guide's formula tribit six and each selfcorresponding boom cylinder's the pole chamber that has links to each other, and the actuator port A that guide's formula tribit six leads to the switching -over valves links with boom cylinder's the pole chamber homogeneous phase that has, the utility model discloses guarantee not only that swing arm decline does not exceed the speed limit to reduce energy consumption, extension parts life.
Description
Technical field
This utility model is related to a kind of hydraulic control system for excavator swing arm.
Background technology
The swing arm hydraulic control system of large excavator need to realize lifting, decline and three kinds of working conditions of car of swing arm,
It 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 wherein to prop up car state so that
Its piston rod band is carried and is reclaimed, and excavator front end is propped, for excavator across obstacle；Existing hydraulic control system passes through
Handrail valve control three six-way transfer valves of pilot-operated type drive boom cylinder action, to realize lifting, decline and propping up three kinds of work of car
State；During swing arm declines, apparatus for work reaches tens tons of weight, generally also in the connection oil of boom cylinder rodless cavity
One-way throttle valve is installed on road, by the damping of choke valve, the very high return oil pressure of foundation carrys out anti-stopper arms decline hypervelocity and brings
Hidden danger, for example pound car, whole machine unstability and swing arm or dipper crackle；But as fixed orifice size is difficult to meet negative
The pressure change that the change of lotus, the change of operating radius bring, conventional way are that throttling accomplishes as little as possible, to ensure swing arm
Decline does not exceed the speed limit, and in this case in order to obtain very fast and stable decrease speed, need to apply to lead in boom cylinder rod chamber again
Dynamic pressure, or even active pressure reaches 300bar, thus will necessarily bring a large amount of heatings, piston rod seal component bears this should not
The pressure for bearing, need to increase the heat radiation power and overall dimensions of cooler, both increase energy consumption, reduce part service life again, comprehensive
Close high cost.
The content of the invention
The purpose of this utility model is for deficiencies of the prior art, there is provided a kind of excavator swing arm hydraulic pressure control
System processed, it can realize unpowered decline when state is declined, and not only ensure that swing arm declines and do not exceed the speed limit, and reducing energy consumption, prolongation
Part service life, has the advantages that integrated cost is low.
For reaching above-mentioned purpose, excavator swing arm hydraulic control system of the present utility model, including more than one swing arm
Oil cylinder, three six-way transfer valves of pilot-operated type, handrail valve；Characterized by further comprising a car reversal valve and each with every boom cylinder
Self-corresponding combined control valve, an actuator port B of the guiding valve Median Function of three six-way transfer valves of the pilot-operated type and oil return
Mouth is connected；One control port of three six-way transfer valves of one output oil port b1 and pilot-operated type of handrail valve is connected, handrail valve it is another
One output oil port a1 is connected by another control port of three six-way transfer valves of car reversal valve and pilot-operated type；Each combination control
Valve processed includes that pilot-operated type hydraulic control lock and the pilot proportional reversing valve being sequentially connected, pilot-operated type hydraulic control lock and pilot proportional are changed
It is connected with the output oil port a1 of handrail valve to the control port of valve；The oil-in of pilot-operated type hydraulic control lock is by respective unidirectional
The actuator port B of three six-way transfer valves of valve and pilot-operated type is connected, the oil-in of pilot-operated type hydraulic control lock also with respective corresponding swing arm
The rodless cavity of oil cylinder is connected, and the oil-out of pilot proportional reversing valve is changed by three clematis stem of respective check valve and pilot-operated type
It is connected to the actuator port B of valve, the oil-out of pilot proportional reversing valve is also moved with each corresponding by respective check valve
The rod chamber of arm oil cylinder is connected, another actuator port A of three six-way transfer valves of pilot-operated type and the rod chamber of all boom cylinders
It is connected；
During work, this utility model is capable of achieving lifting, decline and three kinds of working conditions of car of swing arm；When declining, behaviour
Make handrail valve handle, make its output oil port a1 export pilot pressure oil, now prop up car reversal valve and disconnect, do not control pilot-operated type three
Position six-way transfer 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 without active pressure oil
It is passed through, 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,
The hydraulic oil of boom 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
The actuator port B of three six-way transfer valves of Jing pilot-operated types, oil return opening flow back to fuel tank, and another road flows into the rod chamber of boom cylinder,
Repairing function is realized, is not only avoided emptying phenomenon from occurring, is produced cavitation erosion, damages cylinder interior part, also reduce and flow through pilot-operated type three
The pressure loss of position six-way transfer valve, reduces system heat generation；This utility model is capable of achieving the unpowered of boom cylinder piston rod
Decline, main pump does not provide power oil for declining, and reduces the moment of torsion of electromotor reality output, has saved fuel consumption, also subtracted
The heat producing losses of system are lacked, the heat radiation power and overall dimensions of cooler can have been reduced；Driver can be according to the change of load, operation
The change of radius, speed, by oneself judge operation handrail valve handle amplitude, pilot proportional reversing valve adapt to automatically set up with
The corresponding aperture of operation handle, its orifice size change with pilot pressure and change, and make, in the case of different decrease speeds, to begin
Equal safe pressure is set up in boom cylinder rodless cavity eventually, anti-stopper arms exceed the speed limit, decline state in safety all the time.
Used as further improvement of the utility model, described car reversal valve is solenoid directional control valve；It is easy to a manipulation car to change
To valve；
Used as further improvement of the utility model, the rodless cavity of the every boom cylinder also passes through respective overflow valve
It is connected with the oil-out of corresponding pilot proportional reversing valve；When there is load abnormal, overflow valve is opened, boom cylinder rodless cavity
Interior hydraulic oil Jing overflow valves, three six-way transfer valves of pilot-operated type flow back to fuel tank, and boom cylinder and pilot proportional can be protected to change
To valve；
Used as further improvement of the utility model, the boom cylinder is two, three clematis stem commutations of the pilot-operated type
Another actuator port A of valve is connected with the rod chamber of two boom cylinders by shunting body, three six-way transfer valves of pilot-operated type
Actuator port B is connected by the check valve that shunting body is locked into hydraulic fluid port front end with two pilot-operated type hydraulic controls；It is capable of achieving by two shunting bodies
The harmony of two boom cylinders oil pressure when lifting and prop up car, completing beneficial to action；
In sum, this utility model can realize unpowered decline when state is declined, and not only ensure that swing arm declines and do not surpass
Speed, and reducing energy consumption, elongate member service life, have the advantages that integrated cost is low.
Description of the drawings
Hydraulic schematic diagrams of the Fig. 1 for this utility model embodiment.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described in further detail.
As shown in figure 1, the excavator swing arm hydraulic control system of the embodiment, including two boom cylinders 1, pilot-operated type
Three six-way transfer valves 2, handrail valve 3, a car reversal valve 4 and with respective every 1 corresponding two combined control valve 5 of boom cylinder,
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；Prop up car reversal valve
4 is 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 output oil port a1 of handrail valve 3 is by a car reversal valve 4 and another control port a2 of three six-way transfer valves 2 of pilot-operated type
It is connected；Two combined control valves 5 overflow including the pilot-operated type hydraulic control lock 6 and pilot proportional reversing valve 7 and being sequentially connected
Stream valve 8, the control port of pilot-operated type hydraulic control lock 6 and pilot proportional reversing valve 7 are connected with the output oil port a1 of handrail valve 3；
The oil-in of two pilot-operated type hydraulic controls lock 6 passes through the three clematis stem 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 rodless cavity phase of the oil-in of each pilot-operated type hydraulic control lock 6 also with respective corresponding boom cylinder 1
Even, the oil-in in each pilot-operated type hydraulic control lock 6 is additionally provided with throttling with the connecting line of respective corresponding boom cylinder rodless cavity
Valve；The oil-out of two pilot proportional reversing valves 7 passes through respective check valve 10 and shunting body 12 and three clematis stem of pilot-operated type
The actuator port B of reversal valve 2 is connected, the oil-out of two pilot proportional reversing valves 7 also by respective check valve 11 with it is each
Be connected from the rod chamber of correspondence boom cylinder 1, the rodless cavity of every boom cylinder 1 also by the respective overflow valve 8 with it is right
The oil-out 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 is by shunting
Body 13 is connected with the rod chamber of two boom cylinders 1；
Operation principle of the present utility model is as follows：
1）Moved arm lifting：Operate the handle of handrail valve 3, make its output oil port b1 export pilot pressure oil, pilot pressure oil
Control port b2 into three six-way transfer valves 2 of pilot-operated type, its guiding valve is promoted to move, three six-way transfer valves 3 of pilot-operated type
Oil inlet P 1 is connected with actuator port B, pressure oil Jing shunting bodies 12 that main pump comes, is pushed two check valves 9 open and is entered two boom cylinders 1
Rodless cavity, promote piston rod stretch out, realize lifting；
2）Swing arm declines：Operate the handle of handrail valve 3, make its output oil port a1 export pilot pressure oil, now prop up car and change
Disconnect to valve 4, do not control three 2 actions of six-way transfer valve of pilot-operated type, during the guiding valve 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 now pilot pressure oil controls the pilot-operated type liquid of two boom cylinders 1
Control lock 6 is opened and the guiding valve of pilot proportional reversing valve 7 commutates, 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, Jing shunting bodies 12, pilot-operated type three all the way open
The actuator port B of position six-way transfer valve 2, oil return inlet T 1 flow back to fuel tank, and another road pushes check valve 11 open, flows into boom cylinder 1
Rod chamber, realizes repairing function, realizes declining；This process not only avoids the rod chamber emptying phenomenon of boom cylinder 1 from occurring, produce
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 car：Operate 3 handle of handrail valve, make its output oil port a1 export pilot pressure oil, while manipulating a car
Reversal valve 4 is connected, and pilot pressure oil promotes the guiding valve reverse movement of three six-way transfer valves 2 of pilot-operated type, three clematis stem of pilot-operated type
The oil inlet P 1 of reversal valve 2 is connected with actuator port A, the having into two boom cylinders 1 of pressure oil Jing shunting bodies 13 that main pump comes
Rod cavity, promotes its piston rod to reclaim, while the pilot-operated type hydraulic control lock 6 that pilot pressure oil also controls two boom cylinders 1 is opened and first
The guiding valve commutation of conduction proportional reversing valve 7, the hydraulic oil in 1 rodless cavity of boom cylinder flow through respective pilot-operated type hydraulic control and lock 6 Hes
7 pusher opening one-way valve 10, Jing shunting bodies 12 of pilot proportional reversing valve, the actuator port B of three six-way transfer valves 2 of pilot-operated type,
Oil return inlet T 1 flows back to fuel tank（The pressure oil that now check valve 11 is come by main pump is closed）, realize that the band of piston rod is carried and reclaim, carry out
Prop up car；
This utility model is capable of achieving the unpowered decline of boom cylinder piston rod, and during decline, main pump does not provide power oil,
The moment of torsion of electromotor reality output is reduced, fuel consumption has been saved, the heat producing losses of system are decreased, can be in reduction system
The heat radiation power and overall dimensions of cooler；Driver can according to the change of load, operating radius, speed change, sentence by oneself
The amplitude of disconnected 3 handle of operation handrail valve, pilot proportional reversing valve 7 adapt to set up aperture corresponding with operation handle automatically, its
Orifice size changes with pilot pressure and changes, and makes in the case of different decrease speeds, builds in boom cylinder rodless cavity all the time
Vertical equal safe pressure, anti-stopper arms exceed the speed limit, decline state in safety all the time.
When there is load abnormal, overflow valve 8 is opened, hydraulic oil Jing overflow valves 8 in 1 rodless cavity of boom cylinder, unidirectional
Valve 10, shunting body 12, three six-way transfer valves 2 of pilot-operated type flow back to fuel tank, can protect boom cylinder 1 and pilot proportional reversing valve
7 are not damaged by；
Oil pressure when choke valve can cause two boom cylinder 1 to lift is basically identical, realizes the synchronicity of lifting；
The harmony of two boom cylinders 1 oil pressure when lifting and prop up car is capable of achieving by two shunting bodies 12,13, beneficial to action
Complete；
This utility model is not limited to above-mentioned embodiment, and the such as quantity of boom cylinder can be varied with, such as without certainly
The requirement of dynamic control, a car reversal valve may also be employed other reversal valves.
Claims (4)
1. a kind of excavator swing arm hydraulic control system, the boom cylinder including more than, three six-way transfer valves of pilot-operated type,
Handrail valve；Characterized by further comprising a car reversal valve and with each self-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
One control port of three six-way transfer valves of b1 and pilot-operated type is connected, and another output oil port a1 of handrail valve is by a car reversal valve
Another control port with three six-way transfer valves of pilot-operated type is connected；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-in of pilot-operated type hydraulic control lock is by respective check valve and three six-way transfer valves of pilot-operated type
Actuator port B is connected, and the oil-in of pilot-operated type hydraulic control lock is also connected with the rodless cavity of respective corresponding boom cylinder, pilot proportional
The oil-out 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-out of proportional reversing valve is also connected with the rod chamber of respective corresponding boom cylinder by respective check valve, 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 claimed in claim 1, it is characterised in that described car reversal valve is electromagnetism
Reversal valve.
3. excavator swing arm hydraulic control system as claimed in claim 1, it is characterised in that the nothing of the every boom cylinder
Rod cavity is also connected with the oil-out of corresponding pilot proportional reversing valve by respective overflow valve.
4. the excavator swing arm hydraulic control system as described in claims 1 to 3 is arbitrary, 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 with the rod chamber of two boom cylinders by shunting body
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 |
|---|---|---|---|
| CN201620926027.8U CN206034529U (en) | 2016-08-24 | 2016-08-24 | Excavator swing arm hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620926027.8U CN206034529U (en) | 2016-08-24 | 2016-08-24 | Excavator swing arm hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206034529U true CN206034529U (en) | 2017-03-22 |
Family
ID=58302884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620926027.8U Withdrawn - After Issue CN206034529U (en) | 2016-08-24 | 2016-08-24 | Excavator swing arm hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206034529U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149795A (en) * | 2016-08-24 | 2016-11-23 | 四川邦立重机有限责任公司 | Excavator swing arm hydraulic control system |
-
2016
- 2016-08-24 CN CN201620926027.8U patent/CN206034529U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149795A (en) * | 2016-08-24 | 2016-11-23 | 四川邦立重机有限责任公司 | Excavator swing arm hydraulic control system |
| CN106149795B (en) * | 2016-08-24 | 2018-07-27 | 四川邦立重机有限责任公司 | Excavator swing arm hydraulic control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170322 Effective date of abandoning: 20180727 |
|
| AV01 | Patent right actively abandoned |