CN203783995U - Power priority output system of variable pump adopting negative flow feedback - Google Patents
Power priority output system of variable pump adopting negative flow feedback Download PDFInfo
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- CN203783995U CN203783995U CN201420095880.0U CN201420095880U CN203783995U CN 203783995 U CN203783995 U CN 203783995U CN 201420095880 U CN201420095880 U CN 201420095880U CN 203783995 U CN203783995 U CN 203783995U
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- valve
- output system
- flow feedback
- power
- variable pump
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- 239000007788 liquid Substances 0.000 claims abstract description 42
- 229920001971 elastomer Polymers 0.000 claims abstract description 11
- 239000000806 elastomer Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a power priority output system of a variable pump adopting negative flow feedback. The power priority output system comprises an executing oil cylinder (1), a reversing valve (2), a shuttle valve (3), a constant speed valve (4), a generator (5), an electromagnetic directional valve (6) and main pumps (7), and is characterized in that a priority liquid taking valve is arranged above the main pumps (7) and comprises a valve body (8), a valve deck (9) and a valve core (11), the valve core (11) is embedded into a valve hole in the valve deck (9) through an elastomer (12) to perform relative movement, and the lower surface of the valve core (11) is matched with a plane of the valve body (8). With the adoption of the structure, executive components such as a hydraulic generator, an oil cylinder and the like added on a priority liquid taking oil line can be operated first, and an original hydraulic system can work according to original functions while the components normally work.
Description
Technical field
The utility model relates to the preferential output system of a kind of power, especially relates to a kind of preferential output system of power of minus flow feedback variable pump.
Background technique
Conventionally hydraulic shovel, loader are operated in field, if in the time of need to installing the instruments such as hydraulic generator, hydraulic air compressor, hydraulic pressure electric welding machine, hydraulic electromagnetic generator additional, at the same time otherwise affect under the prerequisite of original engineering machinery action, only have the standby valve block in the original multi-way valve of the engineering machinery utilized to get liquid, if standby valve block is installed additional element and uses, with regard to unrenewable standby, got liquid; And when needing to install the main equipment as excavator drills steel sharpener, need to could meet the situation of flow from two complete full extracts in pump the inside, adopt a slice service valve just not much of that; Meanwhile, even if can adopt standby, standby price is relatively costly.
Meanwhile, if the rated flow of single channel is got liquid technology, it adopts and buys service valve and be installed to multi-way valve and get liquid to be used for driving the equipment such as hydraulic generator, and purchase cost is high, and has movable spool and handle to control, and it is unreliable to use.If adopt two-way to get liquid technology, be used for simultaneously getting separately liquid from double pump and offer and as dug, change brills and wait equipment priority task, can directly get liquid, need employing get liquid from the parallel connection of running motor valve block, cause equipment to work when walking, the work of can only stopping.
Model utility content
Technical problem to be solved in the utility model provides a kind of preferential output system of power of minus flow feedback variable pump, when the main pump employing minus flow feedback control while of the engineering machinery such as hydraulic shovel, while not having unnecessary service valve to use, can install in one end of oil hydraulic pump a slice additional and sandwich the preferential liquid taking valve of formula, the preferential oil circuit taking out can constant speed valve fuel feeding in parallel to hydraulic generator, hydraulic electromagnetic generator, hydraulic pressure electric welding machine etc. needs the load of rated flow, can for fluid, give the oil cylinder that needs proportional control by proportion expression load sensing multi-way valve in parallel, motor even load, the unnecessary fluid fuel feeding of simultaneously preferential liquid taking valve is given original hydraulic system, realize the object of the action that does not affect original system.
In order to realize this object, the technical solution of the utility model is: a kind of preferential output system of power of minus flow feedback variable pump, comprise and carry out oil cylinder, selector valve, shuttle valve, constant speed valve, generator, solenoid directional control valve and main pump, on described main pump, be provided with preferential liquid taking valve, described preferential liquid taking valve comprises valve body, valve gap and spool, described spool is embedded at by elastomer in the valve opening of described valve gap and forms relative movement, and described spool lower surface carries out plane with a plane of described valve body and coordinates.
Further improvement as technique scheme:
According to embodiment of the present utility model, in described valve gap, be provided with guiding element, described guiding element is inserted in described elastomer middle part and described relative connection of valve gap inwall.
According to embodiment of the present utility model, described elastomeric one end is connected with described valve gap, and the other end is connected with described spool.
According to embodiment of the present utility model, described guiding element is guider screw, and described guider screw is fixedly connected with described valve gap, and described elastomer is memory spring, and described memory spring internal diameter is more than or equal to described guiding element external diameter.
According to embodiment of the present utility model, described valve gap is fixedly connected with described valve body, has seal ring sealing in the middle of it.
According to embodiment of the present utility model, described main pump is minus flow feedback variable duplex pump.
According to embodiment of the present utility model, described valve gap and spool form semiclosed chamber, are also provided with at least one passage on described valve gap, and described chamber is communicated with external environment condition by described passage.
According to embodiment of the present utility model, described valve body is provided with the cavity matching with described valve gap, and described cavity is communicated with described main pump, is also provided with at least one passage on described valve body, and described passage is communicated with described cavity and external environment condition respectively.
According to embodiment of the present utility model, on described valve gap, be also provided with a runner communicating with described valve body cavity.
Compared with prior art, the beneficial effects of the utility model for adopt can preferentially move after said structure add below preferentially get the executive components such as hydraulic generator on liquid oil circuit, oil cylinder, in the normal work of these elements, original hydraulic system can be according to original function operation.Meanwhile, if the rated flow of single channel is got liquid technology, be used for driving the equipment such as hydraulic generator, it adopts preferential liquid taking valve cost together with excess-flow valve and solenoid valve lower, there is no movable Joystick, uses reliable.If two-way is got liquid technology, be used for simultaneously getting separately liquid from double pump and offer and as dug, change priority task such as equipment such as brills grade, very convenient, as long as just utilize two covers preferentially to get liquid system can complete operation.
Accompanying drawing explanation
Fig. 1 is the utility model hydraulic schematic diagram and preferential liquid taking valve sectional drawing;
Fig. 2 is the utility model mounting structure schematic diagram;
In figure: 1, carry out oil cylinder; 10, guiding element; 11, spool; 12, elastomer; 13, formula of multi-way valve one; 14, flow transducer one; 15, formula of multi-way valve two; 16, flow transducer two; 2, selector valve; 3, shuttle valve; 4, constant speed valve; 5, generator; 6, solenoid directional control valve; 7, main pump; 8, valve body; 9, valve gap.
Embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
Embodiment: referring to Fig. 1, Fig. 2, the preferential output system of power of minus flow feedback variable pump, comprises and carries out oil cylinder 1, selector valve 2, shuttle valve 3, constant speed valve 4, generator 5, solenoid directional control valve 6, main pump 7, preferential liquid taking valve valve body 8, preferential liquid taking valve valve gap 9, guiding element 10, preferential liquid taking valve spool 11, elastomer 12, formula of multi-way valve 1, flow transducer 1, formula of multi-way valve 2 15, flow transducer 2 16 compositions.
Wherein, selector valve 2 is proportion expression load-sensitive multiple directional control valve, and generator 5 is hydraulic generator, and main pump 7 adopts minus flow feedback variable duplex pump, and elastomer 12 is memory spring, and guiding element 10 is guider screw.
Wherein the P2 mouth of the rear pump of minus flow feedback variable duplex pump 7 is directly connected to the original formula of multi-way valve 2 15 of engineering machinery and carries out the action that various original executive components are controlled in work, unnecessary fluid flows into flow transducer 2 16, after the front end of flow transducer 2 16 feeds back to pressure signal, the flow control mouth of pump is controlled the output flow of rear pump, reach the object of Variable Control, be original minus flow feedback controling mode, for not installing additional, preferentially get liquid system mode.
Referring to Fig. 2, between the front pump discharge P1 mouth of minus flow feedback variable duplex pump and original oil outlet tube split flange, sandwich a preferential liquid taking valve, preferential liquid taking valve is by preferential liquid taking valve valve body 8, preferential liquid taking valve valve gap 9, guider screw, preferential liquid taking valve spool 11, the compositions such as spring, wherein spool 11 can move in the valve opening of valve gap 9, the lower end of spool 11 is carried out plane with a plane of valve body 8 and is coordinated, one end of spring contacts with valve gap 9, one end contacts with spool 11, after installation, spring has certain precompression, spool 11 is tightly fitted with valve pocket plane under the effect of spring, guider screw is fixedly connected with valve gap 9, spring 12 endoporus are close with guider screw 10 outside dimensions, can prevent spring 12 bending deflections, valve gap 9 is fixedly connected with valve body 8, and there is seal ring sealing centre, prevents that chamber inner fluid from leaking.Valve gap 9 has a D runner and spring chamber UNICOM above.
At the P1 of front pump mouth, sandwich the preferential liquid taking valve of a slice, in the preferential idle situation of road C, fluid enters from preferential liquid taking valve A mouth, after valve port through to B mouth, enter original hydraulic pressure formula of multi-way valve one again, remove to drive original executive component, unnecessary fluid is got back to fuel tank through a flow transducer 1, from flow transducer one 14 front ends, draw and control the output flow that oil pressure is got back to the swash plate control mouthful control front pump of front pump, reach the object of Variable Control.
After described preferential liquid taking valve C mouth, can be connected in parallel and need the valve of variety of priority driven and executive component, such as connecting solenoid directional control valve, add constant speed valve system, going to drive needs the hydraulic generator of rated flow to generate electricity, can connect proportion expression load sensing multi-way valve system, going to drive needs the oil cylinder of proportionality velocity modulation to carry out change speed linear motion.
The described pressure hydraulic fluid port of preferentially getting all executive components on liquid oil circuit is fed back to the maximum pressure value in all executive components by shuttle valve the D mouth of preferential liquid taking valve, can make front pump in the situation that original system does not have pressure, give preferential oil circuit build-up pressure, be used for adapting to and preferentially get executive component on liquid oil circuit and normally work.
C mouth is directly and A mouth UNICOM above for described valve body 8, C mouth is out afterwards for preferentially getting liquid oil circuit, after can connect solenoid directional control valve 6 and add constant speed valve 4, form a road flow setting type and preferentially get liquid oil circuit, can to hydraulic generator, hydraulic electromagnetic generator, hydraulic pressure spot welding machine etc., need the executive component of rated flow by fuel feeding.Also can be simultaneously in parallel to proportion expression load-sensitive multiple directional control valve, drive and carry out oil cylinder 1, carry out proportional control oil cylinder or motor action.The high-pressure mouth of these executive components all adopts shuttle valve 3 to connect, and takes out the maximum pressure in all executive components, feeds back to the D mouth of preferential liquid taking valve, makes system can set up required pressure.
If proportion expression load-sensitive multiple directional control valve, containing shuttle valve 3, can directly utilize, if do not contained, need an external shuttle valve, the maximum pressure in the pressure duct of two executive components is drawn and gets back to preferential liquid taking valve.
Although oneself has described the utility model with reference to several exemplary embodiments, should be appreciated that term used is explanation and exemplary and nonrestrictive term.Because the utility model can specifically be implemented in a variety of forms and not depart from spirit or the essence of model utility, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (9)
1. the preferential output system of power of a minus flow feedback variable pump, comprise and carry out oil cylinder (1), selector valve (2), shuttle valve (3), constant speed valve (4), generator (5), solenoid directional control valve (6) and main pump (7), it is characterized in that: described main pump is provided with preferential liquid taking valve on (7), described preferential liquid taking valve comprises valve body (8), valve gap (9) and spool (11), described spool (11) is embedded at the interior formation of the valve opening relative movement of described valve gap (9) by elastomer (12), described spool (11) lower surface carries out plane with a plane of described valve body (8) and coordinates.
2. the preferential output system of power of minus flow feedback variable pump according to claim 1, it is characterized in that: in described valve gap (9), be provided with guiding element (10), described guiding element (10) is inserted in described elastomer (12) middle part and described valve gap (9) relative connection of inwall.
3. the preferential output system of power of minus flow feedback variable pump according to claim 1, is characterized in that: one end of described elastomer (12) is connected with described valve gap (9), and the other end is connected with described spool (11).
4. the preferential output system of power of minus flow feedback variable pump according to claim 2, it is characterized in that: described guiding element (10) is guider screw, described guider screw is fixedly connected with described valve gap (9), described elastomer (12) is memory spring, and described memory spring internal diameter is more than or equal to described guiding element (10) external diameter.
5. the preferential output system of power of minus flow feedback variable pump according to claim 1, is characterized in that: described valve gap (9) is fixedly connected with described valve body (8), has seal ring sealing in the middle of it.
6. the preferential output system of power of minus flow feedback variable pump according to claim 1, is characterized in that: described main pump (7) is minus flow feedback variable duplex pump.
7. the preferential output system of power of minus flow feedback variable pump according to claim 1, it is characterized in that: described valve gap (9) forms semiclosed chamber with spool (11), described valve gap is also provided with at least one passage on (9), and described chamber is communicated with external environment condition by described passage.
8. the preferential output system of power of minus flow feedback variable pump according to claim 1, it is characterized in that: described valve body (8) is provided with the cavity matching with described valve gap (9), described cavity is communicated with described main pump (7), described valve body is also provided with at least one passage on (8), and described passage is communicated with described cavity and external environment condition respectively.
9. the preferential output system of power of minus flow feedback variable pump according to claim 8, is characterized in that: on described valve gap (9), be also provided with a runner communicating with described valve body (8) cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095880.0U CN203783995U (en) | 2014-03-04 | 2014-03-04 | Power priority output system of variable pump adopting negative flow feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095880.0U CN203783995U (en) | 2014-03-04 | 2014-03-04 | Power priority output system of variable pump adopting negative flow feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783995U true CN203783995U (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420095880.0U Expired - Lifetime CN203783995U (en) | 2014-03-04 | 2014-03-04 | Power priority output system of variable pump adopting negative flow feedback |
Country Status (1)
| Country | Link |
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| CN (1) | CN203783995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454741A (en) * | 2014-11-20 | 2015-03-25 | 浙江海聚科技有限公司 | Mass-flow liquid extracting valve |
| CN109210024A (en) * | 2018-09-25 | 2019-01-15 | 柳州柳工挖掘机有限公司 | Minus flow hydraulic control oil circuit and hydraulic system and excavator |
-
2014
- 2014-03-04 CN CN201420095880.0U patent/CN203783995U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454741A (en) * | 2014-11-20 | 2015-03-25 | 浙江海聚科技有限公司 | Mass-flow liquid extracting valve |
| CN104454741B (en) * | 2014-11-20 | 2016-05-11 | 浙江海聚科技有限公司 | A kind of large flow liquid taking valve |
| CN109210024A (en) * | 2018-09-25 | 2019-01-15 | 柳州柳工挖掘机有限公司 | Minus flow hydraulic control oil circuit and hydraulic system and excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140820 |
|
| CX01 | Expiry of patent term |