CN106284479A - A kind of flow control system, method and excavator - Google Patents
A kind of flow control system, method and excavator Download PDFInfo
- Publication number
- CN106284479A CN106284479A CN201610677066.3A CN201610677066A CN106284479A CN 106284479 A CN106284479 A CN 106284479A CN 201610677066 A CN201610677066 A CN 201610677066A CN 106284479 A CN106284479 A CN 106284479A
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- oil
- pressure
- valve
- actuator
- pump
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Classifications
-
- 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
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Abstract
The embodiment of the invention discloses a kind of flow control system, method and excavator, this system includes: control crank, main valve, actuator, selection shuttle valve, actuator, main pump and pump variable oil cylinder；The oil-in selecting shuttle valve connects the oil-out of control crank, and the oil-in of oil-out connection adjustor, for transmitting pilot pressure according to the output pressure of control crank to actuator；The oil-in of main valve connects the oil-out of control crank, oil-out connects actuator and the oil-in of actuator, control actuator for the output pressure according to control crank and perform corresponding actions, and during performing corresponding actions, to actuator traffic load pressure；The oil-out of actuator connects pump variable oil cylinder, for regulating the oil-out pressure of pump variable oil cylinder according to pilot pressure and load pressure, and then regulates main pump delivery.The present invention regulates main pump delivery based on pilot pressure and load pressure, has and meets the advantage that response is quick, energy-conservation simultaneously.
Description
Technical field
The present invention relates to plant equipment control field, be specifically related to a kind of flow control system, method and excavator.
Background technology
The flow control methods of existing excavator hydraulic system includes that inverted flux control, positive flow control and load-sensitive
Control three kinds.Positive flow control system is directly controlled hydraulic pressure pump delivery by handle signal, have that response is fast, good operability excellent
Point, but under complex job operating mode, oil consumption is higher.Load sensitive control system can regulate pump in real time according to surface state
Discharge capacity, reduces system overflow, has a preferable fuel economy, but the shortcoming that there is low-response.How to realize excavator liquid
Pressure system has quickly response and to improve the fuel economy under complex job operating mode be the problem that this area needs solution badly.
Summary of the invention
For defect of the prior art, the invention provides a kind of flow control system, method and excavator, in order to solve
Certainly prior art is difficult to meet quickly response, energy-conservation problem simultaneously.
The embodiment of the present invention proposes a kind of flow control system, including: control crank, main valve, actuator, selection shuttle
Valve, actuator, main pump and pump variable oil cylinder；
The oil-in of described selection shuttle valve connects the oil-out of described control crank, and oil-out connects entering of described actuator
Hydraulic fluid port, transmits pilot pressure for the output pressure according to described control crank to described actuator；
The oil-in of described main valve connects the oil-out of described control crank, and oil-out connects described actuator and described
The oil-in of actuator, controls described actuator for the output pressure according to described control crank and performs corresponding actions, and
During performing corresponding actions, to described actuator traffic load pressure；
The oil-out of described actuator connects described pump variable oil cylinder, for according to described pilot pressure and described load pressure
Power regulates the oil-out pressure of described pump variable oil cylinder, and then regulates described main pump delivery.
Preferably, described actuator includes pressure maintaining valve, the first regulation valve and the second regulation valve；
The oil-in of described pressure maintaining valve connects the oil-out of described selection shuttle valve, and oil-out connects described first regulation valve
Oil-in；
The oil-out of described first regulation valve connects the oil-in of described second regulation valve；
The oil-in of described second regulation valve connects the oil-out of described main valve, and oil-out connects described pump variable oil cylinder.
Preferably, described actuator also includes: power control valve, power control piston and Power control component；
Described power control valve is connected between described second regulation valve and described pump variable oil cylinder；
One end of described power control valve controls piston with described power and is connected, and the other end is with described Power control component even
Connect；
Described Power control component connects described first regulation valve and described pump variable oil cylinder respectively, at described main pump
Discharge capacity when reaching peak power output, control the output pressure of piston outfan according to described power, maintain described main pump
Discharge capacity.
Preferably, described power controls piston, is additionally operable to control the output pressure of described outfan according to external control system
Power, to adjust the peak power output of described main pump.
Preferably, described actuator also includes: pressure limiting valve；
Described pressure limiting valve is connected between described power control valve and described pump variable oil cylinder, the oil-in of described pressure limiting valve
Connect the oil-out of described main pump, for limiting the maximum pressure of described main pump oil-out.
Preferably, also include: slippage pump；
Described slippage pump is connected between the loop between main pump and fuel tank and control crank, for by control crank to
Described main valve transmits described output pressure.
Preferably, during described control crank at least includes rotary handle, swing arm handle and scraper bowl/dipper handle；
Described main valve at least include turn round main valve, swing arm main valve and and scraper bowl/dipper main valve in one；
Correspondingly, described selection shuttle valve, it is additionally operable to the output pressure according to each handle and obtains maximum pilot pressure, and by institute
State maximum pilot pressure transmission to described actuator.
The embodiment of the present invention additionally provides a kind of flow control methods, including flow control system above, specifically includes
Following steps:
When described control crank transmits described output pressure to described main valve, described actuator receives described selection shuttle valve
The pilot pressure of transmission；
During main valve controls described actuator execution corresponding actions according to described output pressure, described actuator
Receive the load pressure of described main valve transmission；
Described actuator regulates the oil-out pressure of described pump variable oil cylinder according to described pilot pressure and described load pressure
Power, to regulate described main pump delivery.
Preferably, described actuator regulates going out of described pump variable oil cylinder according to described pilot pressure and described load pressure
The step of hydraulic fluid port pressure specifically includes:
First regulation valve of described actuator is adjusted according to described pilot pressure, the oil pressure that goes out in conjunction with described main pump outfan
Save the oil-out pressure of described pump variable oil cylinder；
Second regulation valve of described actuator is adjusted according to described load pressure, the oil pressure that goes out in conjunction with described main pump outfan
Save the oil-out pressure of described pump variable oil cylinder.
The embodiment of the present invention also proposed a kind of excavator, including flow control system described above
As shown from the above technical solution, the present invention proposes flow control system, method and excavator are based on pilot pressure
Regulate main pump delivery with load pressure, use merely with prior art compared with arriving first pressure or load pressure, have simultaneously
Meet the advantage that response is quick, energy-conservation.
Accompanying drawing explanation
By being more clearly understood from the features and advantages of the present invention with reference to accompanying drawing, accompanying drawing is schematic and should not manage
Solve as the present invention is carried out any restriction, in the accompanying drawings:
Fig. 1 shows the structural representation of a kind of flow control system that one embodiment of the invention provides；
Fig. 2 shows the structural representation of a kind of flow control system that another embodiment of the present invention provides；
Fig. 3 shows the structural representation of a kind of flow control system that further embodiment of this invention provides；
Fig. 4 shows that in a kind of flow control system that one embodiment of the invention provides, the hyperbola of Power Limitation function shows
It is intended to；
Fig. 5 shows the schematic flow sheet of a kind of flow control methods that one embodiment of the invention provides.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.
Fig. 1 shows the structural representation of a kind of flow control system that one embodiment of the invention provides, with reference to Fig. 1, and should
Flow control system includes: fuel tank 1, power unit 2, actuator 3, actuator 4, main valve 5, selection shuttle valve 6, control crank 7,
Wherein, power unit 2 includes: main pump 202 and pump variable oil cylinder 201；
The oil-in of described selection shuttle valve 6 connects the oil-out of described control crank 7, and oil-out connects described actuator 3
Oil-in, for transmitting pilot pressure according to the output pressure of described control crank 7 to described actuator 3；
The oil-in of described main valve 5 connects the oil-out of described control crank 7, and oil-out connects described actuator 4 He
The oil-in of described actuator 3, controls described actuator 4 for the output pressure according to described control crank 7 and performs accordingly
Action, and during performing corresponding actions, to described actuator 3 traffic load pressure；
The oil-out of described actuator 3 connects described pump variable oil cylinder 201, for according to described pilot pressure and described negative
Carry pressure and regulate the oil-out pressure of described pump variable oil cylinder 201, and then regulate the discharge capacity of described main pump 202.
Flow control system, method and the excavator that the present invention proposes regulates main pump based on pilot pressure and load pressure
Discharge capacity, uses merely with prior art compared with arriving first pressure or load pressure, has that to meet response quick, energy-conservation excellent simultaneously
Point.
Fig. 2 shows the structural representation of a kind of flow control system that another embodiment of the present invention provides, and sees Fig. 2,
This actuator 3 includes that pressure maintaining valve 309, first regulates valve 310 and the second regulation valve 308；
The oil-in of described pressure maintaining valve 309 connects the oil-out of described selection shuttle valve 7, and oil-out connects described first regulation
The oil-in of valve 310；
The oil-out of described first regulation valve 310 connects the oil-in of described second regulation valve 308；
The oil-in of described second regulation valve 308 connects the oil-out of described main valve 5, and oil-out connects described pump variable oil
Cylinder 204.
In the present embodiment, described actuator 3 also includes: power control valve 307, power control piston 306 and power controls
Assembly；
Described power control valve 307 is connected between described second regulation valve 308 and described pump variable oil cylinder 204；
One end of described power control valve 307 controls piston 306 with described power and is connected, and the other end controls with described power
Assembly connects；
Described Power control component connects described first regulation valve 310 and described pump variable oil cylinder 204 respectively, in institute
State the discharge capacity of main pump 5 when reaching peak power output, control the output pressure of piston 306 outfan according to described power, maintain
The discharge capacity of described main pump 5.
In the present embodiment, described power controls piston 306 and is additionally operable to control described outfan according to external control system
Output pressure, to adjust the peak power output of described main pump 5.
In the present embodiment, described actuator 3 also includes: pressure limiting valve 305；
Described pressure limiting valve 305 is connected between described power control valve 307 and described pump variable oil cylinder 204, described pressure limiting
The oil-in of valve 305 connects the oil-out of described main pump 5, for limiting the maximum pressure of described main pump 5 oil-out.
In a possible embodiments, this system also includes: slippage pump 201；
Described slippage pump 201 is connected between the loop between main pump 5 and fuel tank 1 and control crank, for by handling
Handle transmits described output pressure to described main valve 5.
Fig. 3 shows the structural representation of a kind of flow control system that further embodiment of this invention provides, described manipulation
Handle 7 at least includes in rotary handle 701, swing arm handle 702 and scraper bowl/dipper handle 703；Described main valve at least wraps
Include revolution main valve 501, swing arm main valve 502 and and scraper bowl/dipper main valve 503 in one；Correspondingly, described selection shuttle valve 6, also
Maximum pilot pressure is obtained for the output pressure according to each handle, and by described maximum pilot pressure transmission to described actuator
3。
Referring to Fig. 3, the operation principle of this programme is described in detail:
3.1 as it is shown on figure 3, the discharge capacity of main pump 202 is controlled by pump variable oil cylinder 204.In the state of the equilibrium, when L lateral pressure
Raising, discharge of main pump increases.When R lateral pressure raises, and discharge of main pump reduces.The L side of pump variable oil cylinder 204 and main pump outlet phase
Even, its pressure is identical with main pump outlet pressure.
3.2, the pressure of the R side of pump variable oil cylinder 204 the first regulation valve 310 that to be pump discharge pressure connect through pipeline,
Second regulates the force value after valve 308, power control valve 307 and pressure limiting valve 305 regulate jointly, and above-mentioned valve is both preferably two three
Logical valve.Wherein, the first regulation valve 310 produces different opening degrees according to the pressure size of r port, and then produces different pipes
The pressure of road c.Second regulation valve 308 produces different opening degrees according to n port and the pressure size of m port, and then produces
The pressure of different pipeline d.Power control valve 307 produces not according to the dynamic balance of power and slide block 304 that power controls piston 306
Same opening degree, and then produce the pressure of different pipeline e.Pressure limiting valve 305 produces according to the dynamic balance of i mouth pressure and spring
Different opening degrees, and then produce the pressure of different pipeline f.Pipeline f is connected to the R side of pump variable oil cylinder 204.
3.3, the port r pressure of the first regulation valve 310 is produced according to the pressure of hydraulic control port q by pressure maintaining valve 309.Work as port
The pressure of q is big, and the pressure of port r also increases.When the pressure of port q is little, and the pressure of port r also reduces.The q port of the present invention,
It is connected to the maximum pilot pipe selecting shuttle valve 621-623 and the second level to select shuttle valve 611-612 to choose through the first order
Road Pi.Therefore the opening degree of corresponding main valve 501-503 is controlled by control crank 701-703, further as driver
Controlling the motion of corresponding actuator 401-403, while completing the action intentionally got, pipeline Pi is also provided with and grasps
The maximum pilot pressure that vertical handle operation amplitude is proportional.Because the pressure of pipeline Pi is Tong Bu with the operation of driver, therefore
As long as pilot control handle, the port r of the first regulation valve 310 just has proportional pressure.First regulation valve 310 is transported to the right
Dynamic, the pressure of loop c-d-e-f-R reduces, and the discharge capacity of main pump 202 increases, and produces the flow proportional to control crank.
3.4, the control port n of the second regulation valve 308 is connected to load-sensitive pipeline LS.When LS increases, namely work
Load increases, and the circulation area of pipeline c and pipeline d increases, and the pressure of pipeline d reduces, and pump variable oil cylinder 204R lateral pressure reduces,
Main pump delivery increases.When LS pressure reduces, load-sensitive two position three-way valve 308 upwards moves under the effect of pipeline m pressure
Dynamic, the circulation area of pipeline j and pipeline d increases, and the pressure of pipeline d raises, and pump variable oil cylinder 204R lateral pressure raises, main pump
Discharge capacity reduces.It is achieved in main pump delivery to increase along with the rising of load-sensitive signal LS, reduces along with the reduction of LS.
3.5, the power that power control valve 307 controls piston 306 according to power produces different opening with the dynamic balance of slide block 304
Degree of leaving.Slide block 302 and slide block 304 can slide along the surface of lever 303.Lever 303 rotates around center of rotation O, slide block
302 and the relation of equalising torque of slide block 304 be: pp*Ap*L302=F306*L304.Wherein, L302 is that slide block 302 is to lever 303
The distance of centre of gyration O, L306 is the slide block 306 distance to lever 303 centre of gyration O.F306 is that power controls piston 306 institute
The power applied, mainly spring force and Z1 mouth and the hydraulic pressure of Z2.The output of pump 202 can be calculated by following formula, by
Proportional to L302 in pump delivery, therefore when F306 is certain certain value, the output of hydraulic pump is steady state value.
When the pressure of P point, the namely outlet pressure of pump master 202, after exceeding a certain numerical value with the product of discharge of main pump, main
The discharge capacity of pump 202 reduces automatically, and pressure is inverse relation (i.e. hyperbola) with discharge capacity, is achieved in the invariable power limit of main pump
Function processed.
3.6, the effect of pressure limiting valve 305 is the maximum pressure of restriction system.Pressure at pipeline i arrives greatly a certain numerical value
After, pressure limiting valve 305 will move up, and pipeline h communicates with pipeline f.Because pump variable oil cylinder 204 now left and right sides pressure phase
Deng, and the area of R side is relatively big, the discharge capacity of main pump 202 diminishes, and the output flow of main pump 202 reduces.Therefore when the pressure of main pump 202
After power exceedes certain value, the discharge capacity of main pump 202 reduces automatically, it is to avoid system overflow, it is achieved energy-conservation.
3.7, it is as noted previously, as the first regulation valve 310, second and regulates valve 308, power control 307 and pressure limiting valve 305
Co-controlling the discharge capacity of main pump 202, and the first regulation valve 310 is directly controlled by pilot pressure signal Pi, the second regulation valve
308 are directly controlled by load-sensitive LS pressure signal, and therefore the present invention possesses quickly response and is automatically adjusted according to load
Pumpage avoids overflow to realize energy-conservation purpose.
3.8, the first regulation valve 310, second regulates valve 308, power controls logical valve 307 and pressure limiting valve 305, pressure maintaining valve 309
All it is integrated on pump control mechanism 3.Pump control mechanism 3 is connected and position by fluid pressure line with main pump 202 and pump variable oil cylinder 204 thereof
Feedback rod 301 connects.
3.9, this excavator hydraulic system is provided power by electromotor 203, drives main pump 202 and slippage pump 201 to rotate.Mend
Oil pump 201 provides low pressure for handle 801-803.Main pump 202 provides main actions power for actuator 401-403.
In sum, present invention have the advantage that
1, the maximum pump discharge of main pump 202 is directly controlled by pilot pressure, has the quick advantage of response.When driver needs
Quick acting, main pump 202 produces big flow immediately.When driver needs the most affected, main pump 202 reduces main pump row immediately
Amount.The action of main pump 202 is Tong Bu with the action of driver, and driving experience is greatly improved.
2, the actual displacement of main pump 202 is regulated by load-sensitive signal LS, when actual loading is little, and main pump 202 row
Amount also can reduce.When actual loading is big, main pump 202 discharge capacity also can increase.It is actually needed how many main pumps 202 supply how many, keeps away
Exempt from overflow, it is achieved energy-conservation.
3, the logical valve 307 of power control can realize hyperbola Power Limitation function.Pressure limiting valve 305 limits the maximum pressure of system
Power.They are by adjusting the discharge capacity of main pump 202 rather than being realized by overflow valve.The system overflow avoided, it is achieved joint
Energy.
Fig. 4 shows that in a kind of flow control system that one embodiment of the invention provides, the hyperbola of Power Limitation function shows
It is intended to, sees Fig. 4 and understand, the system overflow that above-mentioned steps 3.7 can be effectively prevented from, it is achieved energy-conservation.
Fig. 5 shows the schematic flow sheet of a kind of flow control methods that one embodiment of the invention provides, and sees Fig. 5, should
Flow control methods, it is characterised in that include above-mentioned flow control system, specifically includes following steps:
501, when described control crank transmits described output pressure to described main valve, described actuator receives described selection
The pilot pressure of shuttle valve transmission；
502, during main valve controls described actuator execution corresponding actions according to described output pressure, described tune
Joint device receives the load pressure of described main valve transmission；
503, described actuator regulates the fuel-displaced of described pump variable oil cylinder according to described pilot pressure and described load pressure
Mouth pressure, to regulate described main pump delivery.
The flow control methods that the present invention proposes regulates main pump delivery, with existing skill based on pilot pressure and load pressure
Art uses merely and arrives first pressure or load pressure is compared, and has and meets the advantage that response is quick, energy-conservation simultaneously.
Step 503 specifically includes:
First regulation valve of described actuator is adjusted according to described pilot pressure, the oil pressure that goes out in conjunction with described main pump outfan
Save the oil-out pressure of described pump variable oil cylinder；
Second regulation valve of described actuator is adjusted according to described load pressure, the oil pressure that goes out in conjunction with described main pump outfan
Save the oil-out pressure of described pump variable oil cylinder.
For method embodiment, in order to be briefly described, therefore it is all expressed as a series of combination of actions, but ability
Field technique personnel should know, embodiment of the present invention is not limited by described sequence of movement, because according to the present invention
Embodiment, some step can use other orders or carry out simultaneously.Secondly, those skilled in the art also should know,
Embodiment described in this description belongs to preferred implementation, involved action embodiment party the most of the present invention
Necessary to formula.
Based on same inventive concept, embodiment of the present invention one excavator, it is characterised in that include such as claim 1-
Flow control system described in 7 any one.
In the description of the present invention, illustrate a large amount of detail.It is to be appreciated, however, that embodiments of the invention are permissible
Put into practice in the case of there is no these details.In some instances, it is not shown specifically known method, structure and skill
Art, in order to do not obscure the understanding of this description.
Similarly, it will be appreciated that disclose to simplify the present invention and help understand in each inventive aspect one or many
Individual, above in the description of the exemplary embodiment of the present invention, each feature of the present invention is grouped together into single sometimes
In embodiment, figure or descriptions thereof.But, the method for the disclosure should not explained and i.e. be wanted in reflecting an intention that
Seek the application claims feature more more than the feature being expressly recited in each claim of protection.More precisely, such as
As claims are reflected, inventive aspect is all features less than single embodiment disclosed above.Therefore, abide by
The claims following detailed description of the invention are thus expressly incorporated in this detailed description of the invention, the most each claim itself
Independent embodiment as the present invention.
In describing the invention it should be noted that term " on ", the orientation of the instruction such as D score or position relationship be base
In orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or hint
The device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The restriction of invention.Unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should broadly understood, example
As, can be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be to be electrically connected
Connect；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For this
For the those of ordinary skill in field, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Also, it should be noted in this article, the relational terms of such as first and second or the like is used merely to one
Entity or operation separate with another entity or operating space, and not necessarily require or imply between these entities or operation
There is relation or the order of any this reality.And, term " includes ", " comprising " or its any other variant are intended to contain
Comprising of lid nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
Although being described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art can be without departing from this
Making various modifications and variations in the case of bright spirit and scope, such amendment and modification each fall within by claims
Within limited range.
Claims (10)
1. a flow control system, it is characterised in that including: control crank, main valve, actuator, selection shuttle valve, regulation
Device, main pump and pump variable oil cylinder；
The oil-in of described selection shuttle valve connects the oil-out of described control crank, and oil-out connects the oil-feed of described actuator
Mouthful, transmit pilot pressure for the output pressure according to described control crank to described actuator；
The oil-in of described main valve connects the oil-out of described control crank, and oil-out connects described actuator and described regulation
The oil-in of device, controls described actuator for the output pressure according to described control crank and performs corresponding actions, and holding
During row corresponding actions, to described actuator traffic load pressure；
The oil-out of described actuator connects described pump variable oil cylinder, for adjusting according to described pilot pressure and described load pressure
Save the oil-out pressure of described pump variable oil cylinder, and then regulate described main pump delivery.
System the most according to claim 1, it is characterised in that described actuator includes pressure maintaining valve, the first regulation valve and the
Two regulation valves；
The oil-in of described pressure maintaining valve connects the oil-out of described selection shuttle valve, and oil-out connects the oil-feed of described first regulation valve
Mouthful；
The oil-out of described first regulation valve connects the oil-in of described second regulation valve；
The oil-in of described second regulation valve connects the oil-out of described main valve, and oil-out connects described pump variable oil cylinder.
System the most according to claim 2, it is characterised in that described actuator also includes: power control valve, power control
Piston and Power control component；
Described power control valve is connected between described second regulation valve and described pump variable oil cylinder；
One end of described power control valve controls piston with described power and is connected, and the other end is connected with described Power control component；
Described Power control component connects described first regulation valve and described pump variable oil cylinder respectively, for the row at described main pump
When amount reaches peak power output, control the output pressure of piston outfan according to described power, maintain described main pump delivery.
System the most according to claim 3, it is characterised in that described power controls piston, is additionally operable to according to external control
System controls the output pressure of described outfan, to adjust the peak power output of described main pump.
System the most according to claim 2, it is characterised in that described actuator also includes: pressure limiting valve；
Described pressure limiting valve is connected between described power control valve and described pump variable oil cylinder, and the oil-in of described pressure limiting valve connects
The oil-out of described main pump, for limiting the maximum pressure of described main pump oil-out.
System the most according to claim 1, it is characterised in that also include: slippage pump；
Described slippage pump is connected between the loop between main pump and fuel tank and control crank, is used for by control crank to described
Main valve transmits described output pressure.
System the most according to claim 1, it is characterised in that described control crank at least includes rotary handle, swing arm hands
In handle and scraper bowl/dipper handle one；
Described main valve at least include turn round main valve, swing arm main valve and and scraper bowl/dipper main valve in one；
Correspondingly, described selection shuttle valve, be additionally operable to output pressure according to each handle and obtain maximum pilot pressure, and by described
Big pilot pressure transmission is to described actuator.
8. a flow control methods, it is characterised in that include the flow control system described in any one of claim 1-7, tool
Body comprises the steps:
When described control crank transmits described output pressure to described main valve, described actuator receives the transmission of described selection shuttle valve
Pilot pressure；
During main valve controls described actuator execution corresponding actions according to described output pressure, described actuator receives
The load pressure of described main valve transmission；
Described actuator regulates the oil-out pressure of described pump variable oil cylinder according to described pilot pressure and described load pressure, with
Regulate described main pump delivery.
Method the most according to claim 8, it is characterised in that described actuator is according to described pilot pressure and described load
The step of the oil-out pressure that pressure regulates described pump variable oil cylinder specifically includes:
First regulation valve of described actuator regulates institute according to described pilot pressure, the oil pressure that goes out in conjunction with described main pump outfan
State the oil-out pressure of pump variable oil cylinder；
Second regulation valve of described actuator regulates institute according to described load pressure, the oil pressure that goes out in conjunction with described main pump outfan
State the oil-out pressure of pump variable oil cylinder.
10. an excavator, it is characterised in that include the flow control system as described in any one of claim 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677066.3A CN106284479B (en) | 2016-08-16 | 2016-08-16 | A kind of flow control system, method and excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610677066.3A CN106284479B (en) | 2016-08-16 | 2016-08-16 | A kind of flow control system, method and excavator |
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| CN106284479A true CN106284479A (en) | 2017-01-04 |
| CN106284479B CN106284479B (en) | 2019-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263541A (en) * | 2021-12-29 | 2022-04-01 | 柳州柳工挖掘机有限公司 | Excavator control method and excavator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100663696B1 (en) * | 2006-03-21 | 2007-01-02 | (주)수호산업개발 | Oil pressure circuit system to drive rock drilling device in excavator |
| CN102296665A (en) * | 2011-06-23 | 2011-12-28 | 上海三一重机有限公司 | Excavator hydraulic system carrying load sensing main valve and positive flow pump |
| CN105156391A (en) * | 2015-09-17 | 2015-12-16 | 徐州工业职业技术学院 | Composite variable pump and hydraulic control system using composite variable pump |
| CN105604996A (en) * | 2016-03-18 | 2016-05-25 | 徐州重型机械有限公司 | Load-sensitive control system, control method and hydraulic system |
-
2016
- 2016-08-16 CN CN201610677066.3A patent/CN106284479B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100663696B1 (en) * | 2006-03-21 | 2007-01-02 | (주)수호산업개발 | Oil pressure circuit system to drive rock drilling device in excavator |
| CN102296665A (en) * | 2011-06-23 | 2011-12-28 | 上海三一重机有限公司 | Excavator hydraulic system carrying load sensing main valve and positive flow pump |
| CN105156391A (en) * | 2015-09-17 | 2015-12-16 | 徐州工业职业技术学院 | Composite variable pump and hydraulic control system using composite variable pump |
| CN105604996A (en) * | 2016-03-18 | 2016-05-25 | 徐州重型机械有限公司 | Load-sensitive control system, control method and hydraulic system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263541A (en) * | 2021-12-29 | 2022-04-01 | 柳州柳工挖掘机有限公司 | Excavator control method and excavator |
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| CN106284479B (en) | 2019-02-12 |
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