CN206607620U - Land leveller variable delivery hydraulic system - Google Patents
Land leveller variable delivery hydraulic system Download PDFInfo
- Publication number
- CN206607620U CN206607620U CN201720326865.6U CN201720326865U CN206607620U CN 206607620 U CN206607620 U CN 206607620U CN 201720326865 U CN201720326865 U CN 201720326865U CN 206607620 U CN206607620 U CN 206607620U
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Abstract
The utility model discloses a kind of land leveller variable delivery hydraulic system, including load-sensitive plunger pump, pressure-gradient control valve, shuttle valve I, load sensing multi-way valve I, load sensing multi-way valve II, steering gear, steering cylinder, shuttle valve II, replenishing valve, accumulator, brake valve, brake, the right lift cylinder of perching knife and fuel tank, equipment device hydraulic circuit, steering hydraulic loop and braking hydraulic circuit are separately constituted.The utility model realizes that a variable pump provides pressure oil-source for three loops, when three loops work simultaneously, variable pump passes through the higher steering hydraulic loop of pressure-gradient control valve importance rank and braking hydraulic circuit fuel feeding, load-reacting pump has the function of perceiving load, in operation, whichever executive component action, two shuttle valves all can be by the control port of larger pressure feedback to load-reacting pump, so as to play Flow-rate adjustment, flow and pressure of the present utility model are persistently matched with power demand, produce heat less, power consumption is lower.
Description
Technical field
The utility model is related to a kind of level land machine hydraulic system, specifically a kind of land leveller variable delivery hydraulic system.
Background technology
Land leveller is a kind of earthmoving equipment, is mainly used in Land leveling and the digging of the large area such as highway, airport, farmland
Ditch, the operation such as scratch, bulldoze, loosening the soil, removing the snow；All equipment actions of land leveller, driving is turned to and service brake is all by liquid
Pressure system realizes, therefore level land machine hydraulic system can be divided into equipment device hydraulic circuit, steering hydraulic loop, brake fluid and push back
Road, in addition, some level land machine hydraulic systems also addition of front-wheel drive loop, rear wheel drive loop etc..
In known technology, level land machine hydraulic system, generally using constant displacement pump as power source, is that equipment device hydraulic pressure is returned
Road, steering hydraulic loop and control element and executive component in braking hydraulic circuit provide pressure oil-source；A small number of land levellers are adopted
It is the control in equipment device hydraulic circuit, steering hydraulic loop and braking hydraulic circuit with constant displacement pump+variable pump as power source
Element and executive component processed provide pressure oil-source.All there are the following problems for above two form hydraulic system：Due to constant displacement pump row
Measure as steady state value, its output flow and engine speed direct proportionality are unrelated with load；In start and without hydraulic operation
When, constant displacement pump produces certain power loss with the small pressure output of big flow, and a large amount of fluid are circulated in system circuit, significantly
Reduce fluid service life, in normal operating conditions, constant displacement pump with the big pressure output of big flow, have often flow more than needed with
Overflow type loses, and causes power dissipation.
The content of the invention
In view of the above-mentioned problems of the prior art, the utility model provides a kind of land leveller variable delivery hydraulic system, this is
System flow and pressure are persistently matched with power demand, produce heat less, power consumption is lower, and work is improved in actual applications
Efficiency.
To achieve these goals, the technical solution adopted in the utility model is：A kind of land leveller variable delivery hydraulic system, bag
Include load-sensitive plunger pump, pressure-gradient control valve, shuttle valve I, load sensing multi-way valve I, load sensing multi-way valve II, steering gear, steering oil
Cylinder, shuttle valve II, replenishing valve, accumulator, brake valve, brake, the right lift cylinder of perching knife and fuel tank；The oil-out of the fuel tank with
Load-sensitive plunger pump oiler is connected, and load-sensitive plunger pump oil-out is connected with pressure-gradient control valve oiler, described preferential
One oil-out of valve enters oil with first valve in the oiler and load sensing multi-way valve II of first valve in load sensing multi-way valve I
Mouth is connected, and another oil-out is connected with steering gear oiler and replenishing valve oiler, in the load sensing multi-way valve I
The oil-out of first valve is connected with fuel tank in the oil-out and load sensing multi-way valve II of first valve；The load-sensitive multichannel
Other 5-linked valves are connected with 5 executive components respectively in valve I；Other 5-linked valves are respectively with 5 in the load sensing multi-way valve II
Individual executive component is connected；The steering gear oil-out is connected with steering cylinder, and steering gear drain tap is connected with fuel tank, described
Replenishing valve oil-out is connected with brake valve oiler and accumulator respectively, and the brake valve oil-out is connected with brake,
Brake valve drain tap is connected with fuel tank；Described two oilers of shuttle valve I respectively with pressure-gradient control valve load-sensitive mouthful and load-sensitive
Banked direction control valves I load-sensitives mouthful are connected, and shuttle valve I oil-outs are connected with load-sensitive plunger pump control port；The shuttle valve II
Two oilers are connected with replenishing valve load-sensitive mouthful and steering gear load-sensitive mouthful respectively, shuttle valve II oil-outs and pressure-gradient control valve
Load-sensitive mouthful is connected；The load sensing multi-way valve II load-sensitives mouthful and the load sensing multi-way valve I load-sensitives
Mouth is connected.
The utility model is further, and five connected load sensing multi-way valve I executive components, respectively perching knife are put
Dynamic oil cylinder, articulation steering oil cylinder, front wheel lean oil cylinder, ejector dozer elevating ram and the right lift cylinder of perching knife.
The utility model is further, five connected load sensing multi-way valve II executive components, respectively perching knife
Left lift cylinder, ridge buster elevating ram, perching knife draw oil cylinder, the native angular transformation oil cylinder of perching knife shovel and perching knife rotary motor.
The utility model land leveller variable delivery hydraulic system includes equipment device hydraulic circuit, steering hydraulic loop and brake fluid
Push back road.Wherein in equipment device hydraulic circuit, the left lift cylinder of executive component perching knife, ridge buster elevating ram, perching knife are drawn
The native angular transformation oil cylinder of oil cylinder, perching knife shovel, perching knife rotary motor, perching knife oscillating oil cylinder, articulation steering oil cylinder, front wheel lean oil cylinder,
The right lift cylinder of ejector dozer elevating ram, perching knife passes through two load sensing multi-way valves and pressure-gradient control valve and load-reacting pump phase
In connection, steering hydraulic loop, executive component steering cylinder is connected by steering gear and pressure-gradient control valve with load-reacting pump,
In braking hydraulic circuit, executive component brake is connected by brake valve, accumulator and replenishing valve with load-reacting pump；
Realize that a variable pump provides pressure oil-source for three loops, when three loops work simultaneously, variable pump can pass through pressure-gradient control valve
The higher steering hydraulic loop of importance rank and braking hydraulic circuit fuel feeding.Loaded because load-reacting pump has to perceive
Function, in operation, the action of whichever executive component, two shuttle valves in system all can be by larger pressure feedback
To the control port of load-reacting pump, so as to play Flow-rate adjustment, in the process, load-reacting pump is only exported
Flow and pressure needed for executive component, i.e., flow and pressure of the present utility model are persistently matched with power demand, produce heat
Less, power consumption is lower, and operating efficiency is improved in actual applications.
Brief description of the drawings
Fig. 1 is hydraulic principle block diagram of the present utility model；
In figure：1. load-sensitive plunger pump, 2. pressure-gradient control valves, 3. shuttle valve I, 4. load sensing multi-way valve I, 5. load-sensitives are more
Road valve II, 6. steering gears, 7. steering cylinders, 8. shuttle valve II, 9. replenishing valves, 10. accumulators, 11. brake valves, 12. brakes,
13. the left lift cylinder of perching knife, 14. ridge buster elevating rams, 15. perching knives draw oil cylinder, the native angular transformation oil cylinder of 16. perching knives shovel, 17.
Perching knife rotary motor, 18. perching knife oscillating oil cylinders, 19. articulation steering oil cylinders, 20. front wheel lean oil cylinders, 21. ejector dozers lifting oil
Cylinder, the right lift cylinder of 22. perching knives, 23. fuel tanks.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in figure 1, a kind of land leveller variable delivery hydraulic system of the utility model, including load-sensitive plunger pump 1, pressure-gradient control valve
2nd, shuttle valve I3, load sensing multi-way valve I4, load sensing multi-way valve II5, steering gear 6, steering cylinder 7, shuttle valve II8, replenishing valve
9th, the right lift cylinder 22 of accumulator 10, brake valve 11, brake 12, perching knife and fuel tank 23；The oil-out of fuel tank 23 is quick with loading
The sense oiler of plunger pump 1 is connected, and the oil-out of load-sensitive plunger pump 1 is connected with the oiler of pressure-gradient control valve 2, and the one of pressure-gradient control valve 2
Individual oil-out and first valve oiler phase in the oiler of first valve in load sensing multi-way valve I4 and load sensing multi-way valve II5
Connection, another oil-out is connected with the oiler of steering gear 6 and the oiler of replenishing valve 9, first in load sensing multi-way valve I4
The oil-out of first valve is connected with fuel tank 23 in the oil-out and load sensing multi-way valve II5 of valve；Load sensing multi-way valve I4
In other 5-linked valves be connected respectively with 5 executive components；Other 5-linked valves are performed with 5 respectively in load sensing multi-way valve II5
Element is connected；The oil-out of steering gear 6 is connected with steering cylinder 7, and the drain tap of steering gear 6 is connected with fuel tank 23, and replenishing valve 9 goes out
Hydraulic fluid port is connected with the oiler of brake valve 11 and accumulator 10 respectively, and the oil-out of brake valve 11 is connected with brake 12, braking
The drain tap of valve 11 is connected with fuel tank 23；Two oilers of shuttle valve I3 are more with the load-sensitive mouthful of pressure-gradient control valve 2 and load-sensitive respectively
Road valve I4 load-sensitives mouthful are connected, and shuttle valve I3 oil-outs are connected with the control port of load-sensitive plunger pump 1；Shuttle valve II8 two
Individual oiler is connected with replenishing valve 9 load-sensitive mouthful and the load-sensitive mouthful of steering gear 6 respectively, shuttle valve II8 oil-outs with preferentially
The load-sensitive mouthful of valve 2 is connected；Load sensing multi-way valve II5 load-sensitives mouthful and load sensing multi-way valve I4 load-sensitive mouthful phases
Connection.
The embodiment that wherein executive component the utility model is provided is, be connected five of load sensing multi-way valve I4 perform member
Part, respectively perching knife oscillating oil cylinder 18, articulation steering oil cylinder 19, front wheel lean oil cylinder 20, ejector dozer elevating ram 21 and perching knife
Right lift cylinder 22.Five connected load sensing multi-way valve II5 executive components, the respectively left lift cylinder 13 of perching knife, loosen the soil
Device elevating ram 14, perching knife draw oil cylinder 15, the native angular transformation oil cylinder 16 of perching knife shovel and perching knife rotary motor 17.Certainly according to reality
Situation, executive component can also be other parts.
Specific work process of the present utility model is based on above-described embodiment：Load-reacting pump 1 is from fuel tank 23
Oil suction, fluid is assigned to steering gear 6, replenishing valve 9, load sensing multi-way valve I4 and load sensing multi-way valve II5 through pressure-gradient control valve 2,
If the left lift cylinder 13 of executive component steering cylinder 7, brake 12, perching knife, ridge buster elevating ram 14, perching knife draw oil cylinder
15th, the native angular transformation oil cylinder 16 of perching knife shovel, perching knife rotary motor 17, perching knife oscillating oil cylinder 18, articulation steering oil cylinder 19, front wheel lean
The right lift cylinder 22 of oil cylinder 20, ejector dozer elevating ram 21, perching knife does not all work, and load-sensitive variable pump 1 only exports very low
1 ~ 2MPa of standby pressure and almost nil discharge capacity；Worked if necessary to steering cylinder 7, then drive steering gear 6, enter fluid
Enter steering cylinder 7, so that go to action is realized, meanwhile, steering gear 6 is anti-by shuttle valve II8 and shuttle valve I3 by loading demand information
Load-sensitive plunger pump 1 is fed to, load-sensitive plunger pump 1 exports the flow and pressure matched；If necessary to the work of brake 12
Make, then drive the pressure oil of deposit in brake valve 11, accumulator 10 to flow through brake valve 11 and enter brake 12 to realize braking
Action, when the inner fluid pressure of accumulator 10 is less than the topping up threshold pression that replenishing valve 9 is set, fluid flows through replenishing valve 9 and entered
Accumulator 10 is to supplement the topping up pressure upper limit that pressure is set to replenishing valve 9, while loading demand information is passed through shuttle by replenishing valve 9
Valve II8 and shuttle valve I3 feed back to load-sensitive plunger pump 1, and load-sensitive plunger pump 1 exports the flow and pressure matched；If
The left lift cylinder 13 of perching knife, ridge buster elevating ram 14, perching knife is needed to draw oil cylinder 15, the native angular transformation oil cylinder 16 of perching knife shovel, shovel
Knife rotary motor 17 works, or perching knife oscillating oil cylinder 18, articulation steering oil cylinder 19, front wheel lean oil cylinder 20, ejector dozer lifting oil
The right lift cylinder 22 of cylinder 21, perching knife works, then driving load sensing multi-way valve II5 or the corresponding connection of load sensing multi-way valve I4
Valve, makes fluid enter corresponding executive component, so that equipment device action is realized, meanwhile, load sensing multi-way valve II5 or load are quick
Loading demand information is fed back to load-sensitive plunger pump 1, load-sensitive plunger by sense banked direction control valves I4 by shuttle valve II8 and shuttle valve I3
Pump 1 exports the flow and pressure matched.
Certainly, above-described embodiment is only preferred scheme of the present utility model, is specifically not limited thereto, and on this basis may be used
Make according to actual needs with targetedly adjusting, so as to obtain different embodiments.Due to mode in the cards compared with
It is many, just no longer illustrate one by one here.
Claims (3)
1. a kind of land leveller variable delivery hydraulic system, it is characterised in that including load-sensitive plunger pump（1）, pressure-gradient control valve（2）, shuttle valve I
（3）, load sensing multi-way valve I（4）, load sensing multi-way valve II（5）, steering gear（6）, steering cylinder（7）, shuttle valve II（8）, fill
Liquid valve（9）, accumulator（10）, brake valve（11）, brake（12）, the right lift cylinder of perching knife（22）And fuel tank（23）；
The fuel tank（23）Oil-out and load-sensitive plunger pump（1）Oiler is connected, load-sensitive plunger pump（1）It is fuel-displaced
Mouth and pressure-gradient control valve（2）Oiler is connected, the pressure-gradient control valve（2）An oil-out and load sensing multi-way valve I（4）Middle first
The oiler and load sensing multi-way valve II of valve（5）Middle first valve oiler is connected, another oil-out and steering gear（6）Enter
Hydraulic fluid port and replenishing valve（9）Oiler is connected, the load sensing multi-way valve I（4）The oil-out and load-sensitive of middle first valve
Banked direction control valves II（5）The oil-out and fuel tank of middle first valve（23）It is connected；The load sensing multi-way valve I（4）In other 5-linkeds
Valve is connected with 5 executive components respectively；The load sensing multi-way valve II（5）In other 5-linked valves respectively with 5 executive components
It is connected；The steering gear（6）Oil-out and steering cylinder（7）It is connected, steering gear（6）Drain tap and fuel tank（23）It is connected,
The replenishing valve（9）Oil-out respectively with brake valve（11）Oiler and accumulator（10）It is connected, the brake valve（11）Go out
Hydraulic fluid port and brake（12）It is connected, brake valve（11）Drain tap and fuel tank（23）It is connected；The shuttle valve I（3）Two enter oil
Mouth respectively with pressure-gradient control valve（2）Load-sensitive mouthful and load sensing multi-way valve I（4）Load-sensitive mouthful is connected, shuttle valve I（3）It is fuel-displaced
Mouth and load-sensitive plunger pump（1）Control port is connected；The shuttle valve II（8）Two oilers respectively with replenishing valve（9）It is negative
Carry sensitive mouth and steering gear（6）Load-sensitive mouthful is connected, shuttle valve II（8）Oil-out and pressure-gradient control valve（2）Load-sensitive mouthful is connected
Connect；The load sensing multi-way valve II（5）Load-sensitive mouthful and the load sensing multi-way valve I（4）Load-sensitive mouthful is connected.
2. a kind of land leveller variable delivery hydraulic system according to claim 1, it is characterised in that the load sensing multi-way valve
I（4）Five connected executive components, respectively perching knife oscillating oil cylinder（18）, articulation steering oil cylinder（19）, front wheel lean oil cylinder
（20）, ejector dozer elevating ram（21）With the right lift cylinder of perching knife（22）.
3. a kind of land leveller variable delivery hydraulic system according to claim 1 or 2, it is characterised in that the load-sensitive is more
Road valve II（5）Five connected executive components, the respectively left lift cylinder of perching knife（13）, ridge buster elevating ram（14）, perching knife
Draw oil cylinder（15）, the native angular transformation oil cylinder of perching knife shovel（16）With perching knife rotary motor（17）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720326865.6U CN206607620U (en) | 2017-03-30 | 2017-03-30 | Land leveller variable delivery hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720326865.6U CN206607620U (en) | 2017-03-30 | 2017-03-30 | Land leveller variable delivery hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206607620U true CN206607620U (en) | 2017-11-03 |
Family
ID=60174592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720326865.6U Withdrawn - After Issue CN206607620U (en) | 2017-03-30 | 2017-03-30 | Land leveller variable delivery hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206607620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836337A (en) * | 2017-03-30 | 2017-06-13 | 徐州徐工筑路机械有限公司 | A kind of land leveller variable delivery hydraulic system |
| US11118611B2 (en) | 2019-10-25 | 2021-09-14 | Tonand Inc. | Cylinder on demand hydraulic device |
-
2017
- 2017-03-30 CN CN201720326865.6U patent/CN206607620U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836337A (en) * | 2017-03-30 | 2017-06-13 | 徐州徐工筑路机械有限公司 | A kind of land leveller variable delivery hydraulic system |
| US11118611B2 (en) | 2019-10-25 | 2021-09-14 | Tonand Inc. | Cylinder on demand hydraulic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171103 Effective date of abandoning: 20220920 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20171103 Effective date of abandoning: 20220920 |