CN202176565U - Flow amplifying valve - Google Patents
Flow amplifying valve Download PDFInfo
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- CN202176565U CN202176565U CN2011202822445U CN201120282244U CN202176565U CN 202176565 U CN202176565 U CN 202176565U CN 2011202822445 U CN2011202822445 U CN 2011202822445U CN 201120282244 U CN201120282244 U CN 201120282244U CN 202176565 U CN202176565 U CN 202176565U
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- oil
- valve
- spool
- passage
- valve body
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Abstract
The utility model provides a flow amplifying valve, belonging to the technical field of engineering machinery. The flow amplifying valve solves the technical problems that the oil supply mode of pilot oil of the current flow amplifying valve has high cost, low integration and the like. The flow amplifying valve comprises a valve body, and an oil inlet cavity and an oil return cavity are arranged in the valve body. An amplifying valve core and a pressure-compensated valve core are arranged in the valve body, and a pressure-reducing mechanism provided with an oil inlet passage, an oil outlet passage and an oil return passage is arranged in the valve body. The oil inlet passage is communicated with the oil inlet cavity, the oil outlet passage is communicated with the outside, and the oil return passage is communicated with the oil return cavity. The flow amplifying valve has the advantages of low cost, high integration, convenience for use and the like.
Description
Technical field
The utility model belongs to technical field of engineering machinery, relates to the hydraulic transmission of engineering machinery, particularly a kind of flux amplification valve.
Background technique
Loader is to use one of engineering machinery the most widely, and it has two big hydraulic system, i.e. steering hydraulic system and hydraulic system of working.The general mode that directly drives steering cylinder than the all-hydraulic steering gear of big discharge capacity that adopts of the steering hydraulic system of middle-size and small-size loader.Large-duty loader generally adopts all-hydraulic steering gear and flux amplification valve two-stage hydraulic pressure to amplify mode, and this mode has that steering force is little, efficient is than advantages such as height.
Flux amplification valve is that the spool through the guide oil control flow rate amplifying valve of small flow moves; Flux amplification valve is got into bigger flow turn to oil cylinder; And the big traffic steering working oil of the guide oil of small flow and flux amplification valve output is proportional, realizes the flow enlarging function.
At present, known flux amplification valve guide oil fuel system mainly contains two kinds, and a kind of is the pioneer pump fuel system, and a kind of is the reduction valve fuel system.A kind of preference type flux amplification valve [Chinese patent number: 201020571105X is disclosed like Chinese patent; Notice of authorization number: CN201818577U]; Comprise valve body, be equipped with amplification spool, flow divider valve core, shuttle valve in valve body; Described amplification spool is connected with valve body through guide bracket; The joint of described flow divider valve core and cone valve is equipped with guide's valve seat; Be equipped with the diverter valve spring chamber in the flow divider valve core, the oil duct that is provided with on the described amplification spool from left to right comprises the logical hydraulic fluid port L in a left side, actuator port A, actuator port B and right logical hydraulic fluid port R successively, is equipped with pressure relief means thereon on described guide's valve seat.This flux amplification valve is not owing to itself have pressure-reducing function; Its guide oil fuel feeding be through an external pioneer pump directly from fuel tank get oil or an external reduction valve is to obtain the guide oil of small flow; Guide oil gets into the logical hydraulic fluid port L in a left side or the right logical hydraulic fluid port R of flux amplification valve through all-hydraulic steering gear; Amplification spool in the promotion flux amplification valve moves and makes the bigger fluid entering of flow turn to oil cylinder then, realizes the flow enlarging function." hydraulic pressure and pneumatic " article " guide's fuel system is to the loading machine steering hydraulic system Effect on Performance " that 09 phase was put down in writing in 2008 has disclosed the characteristics of two kinds of guide oil fuel system; The pioneer pump fuel system need dispose independently oil hydraulic pump and relief valve composition [constant; And have bigger spill losses, the whole system cost is also corresponding higher.The reduction valve fuel system is directly got oil from steering pump through reduction valve, and the reduction valve outlet pressure has good permanent character, operates lightly, and cost reduces than guide's fuel system, and energy consumption is lower.But present reduction valve generally all is external, and external reduction valve needs pipe joint and oil pipe, and oil circuit is loaded down with trivial details, and is integrated low, and cost is also high.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind of flux amplification valve that supplies the guide oil function that has.
The purpose of the utility model can realize through following technical proposal: a kind of flux amplification valve, comprise valve body, and have oil suction chamber and oil back chamber in the valve body; Be provided with in the described valve body and amplify spool and pressure compensation spool; It is characterized in that, be provided with in the described valve body have oil inlet passage, the mechanism of decompressor of oil discharge passage and drainback passage, described oil inlet passage is connected with oil suction chamber; Described oil discharge passage can be connected with the external world, and described drainback passage is connected with oil back chamber.
In this flux amplification valve, the mechanism of decompressor is a Fixed pressure reducing valve, and its effect is to make its oil discharge passage fluid maximum pressure equal setting value, and can remain unchanged.This mechanism of decompressor oil inlet passage is connected with oil suction chamber; Part fluid in the oil suction chamber flows out from oil discharge passage from the oil inlet passage guide oil that the mechanism of decompressor forms small flow of flowing through; The spool of guide oil control flow rate amplifying valve moves, and makes the fluid in the flux amplification valve turn to oil cylinder with bigger flow entering.
The mechanism of decompressor is directly installed on the flux amplification valve, has not only realized the guide oil fuel feeding of flux amplification valve, parts such as needed pipe joint, oil pipe when also having saved the external mechanism of decompressor, integrated height, cost is reduced simultaneously.
In above-mentioned flux amplification valve, the described mechanism of decompressor comprises sliding chamber and the spring that is positioned at valve body; Be provided with in the described sliding chamber and can have the communication passage of filler opening, oil outlet and connection filler opening and oil outlet in the described spool along sliding the axially movable spool in chamber; Described filler opening can be connected with oil inlet passage; Oil outlet is connected with oil discharge passage; One end of described spring is resisted against on the end face of spool, and the other end of spring is resisted against on the valve body, and described spring makes filler opening and oil inlet passage keep the trend of largest connected area all the time.
Generally; The oil liquid pressure of oil discharge passage can remain unchanged basically in the mechanism of decompressor; But for some reason; When the oil liquid pressure of oil discharge passage was changed, this mechanism of decompressor can be done corresponding adjustment to the flux that flows into mechanism of decompressor fluid according to the variation of the oil liquid pressure of oil discharge passage, and the oil discharge passage oil liquid pressure is remained unchanged.Owing to this mechanism of decompressor compact structure, take up room for a short time, it can be installed in the valve body of flux amplification valve easily.
In above-mentioned flux amplification valve, described spring is arranged in the sliding chamber, and the spring place portion in sliding chamber is connected with drainback passage.Through such design, make the oil return smoothly of sliding chamber, can not cause sliding chamber pocketed oil and cause relief pressure valve cartridge can't move phenomenon.
In above-mentioned flux amplification valve, the quantity of described filler opening is that 2～4 and described filler opening circumferentially evenly distribute along spool.
In above-mentioned flux amplification valve, the quantity of described oil outlet is that 2～4 and described oil outlet circumferentially evenly distribute along spool.Filler opening and oil outlet all adopt such design, and it is more even to make that fluid flows in spool, are not easy to occur card valve phenomenon.
In above-mentioned flux amplification valve, the total flux of described filler opening is less than the total flux of oil outlet.The filler opening total flux makes that less than the oil outlet total flux fluid that gets into the mechanism of decompressor is easier to discharge from oil outlet, reduces the impact of fluid to mechanism of decompressor part, prolongs the working life of the mechanism of decompressor.
In above-mentioned flux amplification valve, described communication passage is a counterbore from the spool other end along extension of central axis.
In above-mentioned flux amplification valve, described sliding chamber is a counterbore, and place, the aperture of counterbore is provided with the plug in the described aperture of shutoff, and described plug and valve body are through being threaded.Plug and valve body are through being threaded, and plug can unload from valve body easily, help maintenance and maintenance to each parts in the sliding chamber.
In above-mentioned flux amplification valve, the other end of described spring is resisted against on the bottom surface of counterbore through pad.
Compared with prior art, this flux amplification valve has the following advantages:
1, the mechanism of decompressor is directly installed on the flux amplification valve, has not only realized the guide oil fuel feeding of flux amplification valve, low, the integrated height of cost in use, owing to saved externally connected pipe joint, oil pipe supervisor, uses also convenient simultaneously.
2, this flux amplification valve mechanism of decompressor compact structure, take up room for a short time, help the integral layout of flux amplification valve.
3, this flux amplification valve has low, the integrated height of cost, advantage such as easy to use.
Description of drawings
Fig. 1 is the sectional structure schematic representation of this flux amplification valve.
Fig. 2 is the asphalt principle figure of this flux amplification valve.
Among the figure, 1, valve body; 2, amplify spool; 3, pressure compensation spool; 4, oil suction chamber; 5, oil back chamber; 6, oil inlet passage; 7, oil discharge passage; 8, drainback passage; 9, spool; 10, filler opening; 11, oil outlet; 12, slide the chamber; 13, spring; 14, pad; 15, plug.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technological scheme of the utility model is done further to describe, but the utility model is not limited to these embodiments.
As shown in Figure 1, this flux amplification valve comprises valve body 1, has parts and oil suction chamber 4, oil back chamber 5 and the mechanisms of decompressor such as the spool 2 of amplification, pressure compensation spool 3 in the valve body 1.This mechanism of decompressor comprises parts such as sliding chamber 12 in the valve body 1, spring 13, spool 9.
Specifically, the mechanism of decompressor is arranged in the flux amplification valve valve body 1, and this flux amplification valve is a Fixed pressure reducing valve, and its effect is to make its oil discharge passage 7 oil liquid pressures equal setting value, and keeps it constant basically.The mechanism of decompressor has oil inlet passage 6, oil discharge passage 7 and drainback passage 8, and wherein, oil inlet passage 6 is connected with the oil suction chamber 4 of flux amplification valve, and oil discharge passage 7 can be connected with the external world, and drainback passage 8 is connected with the oil back chamber 5 of flux amplification valve.Flow in the oil suction chamber 4 of flux amplification valve gets into the mechanism of decompressor through oil inlet passage 6; The guide oil that forms small flow is discharged from oil discharge passage 7; The spool of guide oil control flow rate amplifying valve moves; Make the fluid in the flux amplification valve turn to oil cylinder, realize the flow enlarging function with bigger flow entering.
The sliding chamber 12 of the mechanism of decompressor is the counterbore on the valve body 1, and place, the aperture of counterbore is provided with the plug 15 in shutoff aperture, adopts between plug 15 and the valve body 1 to be threaded.Be provided with spool 9 in the sliding chamber 12, this spool 9 can move axially along sliding chamber 12, and spool 9 has filler opening 10 that can be connected with oil inlet passage 6 and the oil outlet 11 that is connected with oil discharge passage 7.For fluid is flowed in spool 9 evenly; Usually the quantity of filler opening 10 and oil outlet 11 should be set to 2～4 and circumferentially evenly distribute along spool 9; In addition, the total flux of filler opening 10 should design the total flux less than oil outlet 11, makes the fluid that gets into the mechanism of decompressor can be easier to discharge from liquid outlet; Reduce the impact of high-voltage oil liquid, thereby prolong the working life of the mechanism of decompressor mechanism of decompressor part.In sliding chamber 12, also be provided with spring 13, an end of spring 13 is resisted against on the end face of spool 9, and the other end is resisted against on the valve body 1 through pad 14, and this spring 13 makes filler opening 10 and oil inlet passage 6 keep the trend of largest connected area all the time.The place portion of spring 13 is connected with drainback passage 8; And drainback passage 8 is connected with the oil back chamber 5 of flux amplification valve; Like this, guaranteed that spring 13 place portions have the filling of fluid at any time, prevented because of sliding chamber 12 pocketed oils and make spool 9 irremovable phenomenons.
This flux amplification valve mechanism of decompressor is through be communicated with the oil liquid pressure that area regulate oil discharge passage 7 of change filler opening 10 with oil inlet passage 6.Generally; The pressure of oil discharge passage 7 can remain unchanged basically in the mechanism of decompressor; But for some reason, when the oil liquid pressure of oil discharge passage 7 is changed, when raising like oil liquid pressure when oil discharge passage 7 places; The sliding chamber of the active force promotion 12 interior spools 9 that oil liquid pressure overcomes spring 13 move pressure spring 13; The filler opening 10 of spool 9 is reduced with the area that is communicated with between the oil inlet passage 6, flow into the fluid flow that the mechanism of decompressor arrives oil discharge passage 7 and reduce, arrive setting value until oil discharge passage 7 oil liquid pressures and remain unchanged.When the oil liquid pressure at oil discharge passage 7 places reduces; The active force of spring 13 promote that spools 9 in the sliding chamber 12 move and the filler opening 10 that makes spool 9 and oil inlet passage 6 between be communicated with the area increase; The fluid flow that the mechanism of decompressor of flowing through arrives oil discharge passage 7 increases, and makes the rising of oil discharge passage 7 oil liquid pressures arrive setting value and remains unchanged.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although this paper has used terms such as oil suction chamber 4, oil back chamber 5, valve body 1, sliding chamber 12, spring 13, spool 9 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (9)
1. a flux amplification valve comprises valve body (1), has oil suction chamber (4) and oil back chamber (5) in the valve body (1); Be provided with in the described valve body (1) and amplify spool (2) and pressure compensation spool (3); It is characterized in that be provided with the mechanism of decompressor of have oil inlet passage (6), oil discharge passage (7) and drainback passage (8) in the described valve body (1), described oil inlet passage (6) is connected with oil suction chamber (4); Described oil discharge passage (7) can be connected with the external world, and described drainback passage (8) is connected with oil back chamber (5).
2. flux amplification valve according to claim 1 is characterized in that, the described mechanism of decompressor comprises sliding chamber (12) and the spring (13) that is positioned at valve body (1); Be provided with in the described sliding chamber (12) and can have the communication passage of filler opening (10), oil outlet (11) and connection filler opening (10) and oil outlet (11) in the described spool (9) along the sliding axially movable spool in chamber (12) (9); Described filler opening (10) can be connected with oil inlet passage (6); Oil outlet (11) is connected with oil discharge passage (7); One end of described spring (13) is resisted against on the end face of spool (9); The other end of spring (13) is resisted against on the valve body (1), and described spring (13) makes filler opening (10) and oil inlet passage (6) keep the trend of largest connected area all the time.
3. flux amplification valve according to claim 2 is characterized in that, described spring (13) is arranged in the sliding chamber (12), and spring (13) the place portion in sliding chamber (12) is connected with drainback passage (8).
4. flux amplification valve according to claim 2 is characterized in that, the quantity of described filler opening (10) is that 2～4 and described filler opening (10) circumferentially evenly distribute along spool (9).
5. flux amplification valve according to claim 2 is characterized in that, the quantity of described oil outlet (11) is that 2～4 and described oil outlet (11) circumferentially evenly distribute along spool (9).
6. according to claim 2 or 3 or 4 or 5 described flux amplification valves, it is characterized in that the total flux of described filler opening (10) is less than the total flux of oil outlet (11).
7. according to claim 2 or 3 or 4 or 5 described flux amplification valves, it is characterized in that described communication passage is a counterbore from spool (9) other end along extension of central axis.
8. according to claim 2 or 3 or 4 or 5 described flux amplification valves, it is characterized in that described sliding chamber (12) is a counterbore, place, the aperture of counterbore is provided with the plug (15) in the described aperture of shutoff, and described plug (15) and valve body (1) are through being threaded.
9. flux amplification valve according to claim 8 is characterized in that, the other end of described spring (13) is resisted against on the bottom surface of counterbore through pad (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202822445U CN202176565U (en) | 2011-08-05 | 2011-08-05 | Flow amplifying valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202822445U CN202176565U (en) | 2011-08-05 | 2011-08-05 | Flow amplifying valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176565U true CN202176565U (en) | 2012-03-28 |
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ID=45866446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202822445U Expired - Lifetime CN202176565U (en) | 2011-08-05 | 2011-08-05 | Flow amplifying valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176565U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626615A (en) * | 2016-02-29 | 2016-06-01 | 浙江高宇液压机电有限公司 | Steering feedback type flow amplification valve |
| CN109131550A (en) * | 2018-09-05 | 2019-01-04 | 芜湖中意液压科技股份有限责任公司 | A kind of adjustable Flow amplification hydraulic steering gear of discharge capacity |
-
2011
- 2011-08-05 CN CN2011202822445U patent/CN202176565U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626615A (en) * | 2016-02-29 | 2016-06-01 | 浙江高宇液压机电有限公司 | Steering feedback type flow amplification valve |
| CN109131550A (en) * | 2018-09-05 | 2019-01-04 | 芜湖中意液压科技股份有限责任公司 | A kind of adjustable Flow amplification hydraulic steering gear of discharge capacity |
| CN109131550B (en) * | 2018-09-05 | 2021-05-07 | 芜湖中意液压科技股份有限责任公司 | Displacement-adjustable flow amplification hydraulic steering gear |
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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: 20120328 |
|
| CX01 | Expiry of patent term |