CN202203219U - Automatic exhaust valve for hydraulic system - Google Patents

Automatic exhaust valve for hydraulic system Download PDF

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Publication number
CN202203219U
CN202203219U CN2011202794854U CN201120279485U CN202203219U CN 202203219 U CN202203219 U CN 202203219U CN 2011202794854 U CN2011202794854 U CN 2011202794854U CN 201120279485 U CN201120279485 U CN 201120279485U CN 202203219 U CN202203219 U CN 202203219U
Authority
CN
China
Prior art keywords
valve
retainer
hole
filter screen
piston
Prior art date
Application number
CN2011202794854U
Other languages
Chinese (zh)
Inventor
欧阳小平
黄兆东
Original Assignee
浙江大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江大学 filed Critical 浙江大学
Priority to CN2011202794854U priority Critical patent/CN202203219U/en
Application granted granted Critical
Publication of CN202203219U publication Critical patent/CN202203219U/en

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Abstract

The utility model discloses an automatic exhaust valve for a hydraulic system. A stepped hole is formed on a first valve body; a first filter screen is mounted in a small hole; a first retainer, a first rubber ring mounted on the outer cylindrical surface of the first retainer and a piston with one end pressed on the side surfaces of the first rubber ring are orderly mounted on the first filter screen toward a large hole; and a spring is mounted in the hole of the piston. A stepped hole is formed on a second valve body; a second filter screen is mounted in a small hole; throttling porous trays are orderly mounted on the second filter screen toward a large hole; a second O-shaped sealing ring is mounted on the outer groove surface of each porous tray; the porous tray is mounted in the large hole of the second retainer; the second retainer is mounted in the large hole; and the small end of the second retainer is sleeved in the hole of the spring and mounted on a second rubber ring on the outer cylindrical surface of the second retainer. Besides, the two valve bodies are fixedly and integrally connected together. The automatic exhaust valve, without manual operations, is capable of automatically discharging free air or other gases in a booster oil tank or an oil cylinder in the hydraulic system out of the hydraulic system while preventing oil fluid from leaking outwards; therefore, the adverse effects caused by the free air on the hydraulic system are prevented.

Description

A kind of automatic control pressure vent that is used for hydraulic system
Technical field
The utility model relates to a kind of automatic control pressure vent, particularly relates to a kind of automatic control pressure vent that is used for hydraulic system.
Background technique
The interior gas of the fluid of hydraulic system possibly cause in the hydraulic work system process and seriously influence; And understand entrained air or other gas in the fluid of hydraulic system unavoidably; Therefore, just need an approach of seeking one with these gas released liquor pressing systems.Gas existence form in the hydraulic system mainly contains two types, and first kind is the gas that is dissolved in the fluid, and second kind then is free air free in the system.The outlet valve of present this hydraulic system also has two types to the valve of these two kinds of situations: one type is to be used for eliminating the air that is dissolved in fluid; Another kind of then is the manually operated free air that is used for discharging.The general volume ratio of manual exhaust valve is less, and price is also cheap, but manually-operable causes forgeing of operator easily or ignores.Because the appearance meeting of free air brings serious potential safety hazard to hydraulic system in the hydraulic system, the occasion that especially manpower be difficult to get in those working procedure, so just proposed to can be automatically with the demand of the element of the free air discharge of hydraulic system.
Summary of the invention
The purpose of the utility model is to provide a kind of automatic control pressure vent that is used for hydraulic system, can be automatically with the pressurized fuel tank in the hydraulic system or the air in the oil cylinder or other gas released liquor pressing systems and fluid is leaked outside, do not need manually-operable.
The technological scheme that the utility model adopts is:
The utility model comprises two valve bodies, two O RunddichtringOs, two filter screens, two rubber rings, two retainers, spring, piston and porose disc;
The first valve body center has shoulder hole; First filter screen is installed in the ladder aperture; First filter screen is outwards installed first retainer successively towards the ladder macropore, is installed in the piston that first rubber ring and an end on the first retainer external cylindrical surface are pressed in the first rubber ring side, and spring is housed in the piston hole; The small column of the first valve body entrance point has outside thread, and an O RunddichtringO is equipped with in the screw thread bottom; The second valve body center has shoulder hole; Second filter screen is installed in the ladder aperture; Second filter screen is outwards installed the throttling porose disc successively towards the ladder macropore, and the outer groove surface of porose disc is equipped with the 2nd O RunddichtringO, and porose disc is contained in the macropore of second retainer; Second retainer is contained in the ladder macropore, and the second retainer small end is enclosed within the spring eye and is installed in second rubber ring on the second retainer external cylindrical surface; The small column of the outlet end of second valve body has outside thread; It is whole that first valve body, second valve body use bolt affixed; Gas successively from the inlet flow of first valve body through between first filter screen, the first retainer center hole, piston and the first retainer end face axially behind annular space, the second retainer center hole, porose disc throttle orifice and second filter screen between gap, piston and first valve body, from the outlet outflow of the ladder aperture of second valve body.
Be provided with the groove that can embed the 2nd O RunddichtringO in the middle of its periphery of described porose disc, the big center hole in porose disc two ends is communicated with through the centromere discharge orifice.
The beneficial effect that the utlity model has is:
The utility model can be under the manually operated situation of no staff; Can be automatically with the pressurized fuel tank in the hydraulic system or the free air in the oil cylinder or other gas released liquor pressing systems and fluid is leaked outside, the harmful effect of avoiding free air that hydraulic system is caused.The utility model can be widely used in having the occasion of high security and reliability, is applied to especially in the aviation hydraulic system, has great significance for the Security of aviation hydraulic system.
Description of drawings
Accompanying drawing is the structural representation of this hydraulic system automatic control pressure vent.
Among the figure: 1. first valve body; 2. an O RunddichtringO; 3. first filter screen; 4. first rubber ring; 5. first retainer; 6. spring; 7. piston; 8. second rubber ring; 9. bolt; 10. porose disc; 11. second retainer; 12. second filter screen; 13. the 2nd O RunddichtringO; 14. second valve body.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.
Shown in accompanying drawing, the utility model comprises 4,8, two retainers 5,11 of 3,12, two rubber rings of 2,13, two filter screens of 1,14, two O RunddichtringOs of two valve bodies, spring 6, piston 7, porose disc 10;
First valve body, 1 center has shoulder hole; First filter screen 3 is installed in the ladder aperture; First filter screen 3 is outwards installed first retainer 5 successively towards the ladder macropore, is installed in the piston 7 that first rubber ring 4 and an end on first retainer, 5 external cylindrical surfaces are pressed in first rubber ring, 4 sides, and piston is equipped with spring 6 in 7 holes; The small column of first valve body, 1 entrance point has outside thread, and an O RunddichtringO 2 is equipped with in the screw thread bottom.Second valve body, 14 centers have shoulder hole; Second filter screen 12 is installed in the ladder aperture; Second filter screen 12 is outwards installed throttling porose disc 10 successively towards the ladder macropore, and the outer groove surface of porose disc is equipped with the 2nd O RunddichtringO 13, and porose disc is contained in the macropore of second retainer 11; Second retainer 11 is contained in the ladder macropore, and second retainer, 11 small ends are enclosed within spring 6 holes and are installed in second rubber ring 8 on second retainer, 11 external cylindrical surfaces; The small column of the outlet end of second valve body has outside thread; It is integral body that first valve body 1, second valve body 14 use bolt 9 affixed; Gas successively from the inlet flow of first valve body 1 through between first filter screen 3, first retainer, 5 center holes, piston 7 and first retainer, 5 end faces axially behind annular space, second retainer, 11 center holes, porose disc 10 throttle orifices and second filter screen 12 of gap, piston 7 and 1 of first valve body, from the outlet outflow of the ladder aperture of second valve body 14.
Be provided with the groove that can embed the 2nd O RunddichtringO 13 in the middle of described porose disc 10 its peripheries, the big center hole in porose disc two ends is communicated with through the centromere discharge orifice.
Automatic control pressure vent divides first, second valve body, and the valve inner active chamber divides three parts, is respectively piston ante-chamber A, behind the piston, throttle orifice ante-chamber B, and throttle orifice back cavity C, the piston ante-chamber directly links to each other with hydraulic system, and the throttle orifice back cavity directly links to each other with the external world.Shown in accompanying drawing, first valve body 1 and second valve body 14 are the shell of automatic control pressure vent, and other elements are installed in two valve inners; Hexagon socket head cap screw 9 is fixed up first, second valve body; Piston 7 is installed in first valve body 1, between the piston 7 and first valve body 1 a very trickle annular space is arranged, and piston 7 is pressed on first rubber ring 4 by spring 6; Play the effect of A chamber and the isolation of B chamber; Prevent that air from oppositely getting into hydraulic system, first rubber ring 4 is fixing by first retainer 5, has through hole in the middle of first retainer 5; The bottom compresses first filter screen, 3, the first filter screens 3 and plays the effect of filtering impurity in the hydraulic system oil liquid; Spring 6 tops are enclosed within on second retainer 11; Second rubber ring 8 is equipped with on second retainer, 11 left sides, and the effect of sealing circle 8 is after piston 7 moves to maximum displacement, to be pressed on second seal ring 8, separates B chamber and C chamber; Prevent that pressure from raising, air has been arranged back fluid and has been leaked; Porose disc 10 is installed between second retainer 11 and second valve body 14, and the 2nd O RunddichtringO 13 is installed between the porose disc 10 and second retainer 11, guarantees that gas all passes through from throttle orifice.Porose disc 10 is pressed on second filter screen 12 on second valve body, prevents that introduced contaminants from getting in the valve body, blocks throttle orifice.First valve body 1 is connected through outside thread with hydraulic system, and the outside thread bottom is with an O RunddichtringO 2 sealings.
The principle of above-mentioned hydraulic system automatic control pressure vent is:
The utility model has utilized air different with the fluid viscosity and cause through same damping both sides pressure drop different principle; Specifically: after air gets into automatic control pressure vent A chamber; The precompression that will make piston 7 overcome spring along with the rising of the pressure end distance that moves right leaves, this moment the A chamber with the B chamber through the annulus connection between piston 7 and first valve interior wall, the air entering A chamber of hydraulic system; Get into the B chamber through this annulus, get into the C chamber through the throttle orifice on the throttling porose disc 10 again.Simultaneously, air stream produces pressure drop through the annulus at piston 7 two ends, makes piston 7 remain on some positions, but not exclusively piston 7 is pressed on second annular rubber ring 8, promptly can fully automatic control pressure vent not cut out.Fluid gets into the A chamber after the free air in the system is discharged fully, and flows to the B chamber through the annulus equally, this moment since the viscosity of fluid much larger than air; At this moment can cause very big pressure reduction on the piston both sides, impel piston to be pressed on immediately above second rubber ring 8, this moment is because the A chamber remains high pressure; And B chamber and C chamber are communicated with and do not have fluid to flow; Be that B chamber and C chamber are isobaric, all equal atmospheric pressure, piston can be pressed on second rubber ring always; After the hydraulic system that is communicated with the A chamber reduced, automatic vent valve piston 7 can be resetted by spring 6 once more.If system starts once more, automatic control pressure vent gets into next work cycle thereupon.
Above-mentioned embodiment is used for the utility model of explaining; Rather than the utility model limited; In the protection domain of the spirit of the utility model and claim,, all fall into the protection domain of the utility model to any modification and the change that the utility model is made.

Claims (2)

1. an automatic control pressure vent that is used for hydraulic system is characterized in that: comprise two valve bodies (1,14), two O RunddichtringOs (2,13); Two filter screens (3,12), two rubber rings (4,8), two retainers (5,11); Spring (6), piston (7), porose disc (10);
First valve body (1) center has shoulder hole; First filter screen (3) is installed in the ladder aperture; First filter screen (3) is outwards installed first retainer (5) successively towards the ladder macropore, is installed in the piston (7) that first rubber ring (4) and an end on first retainer (5) external cylindrical surface are pressed in first rubber ring (4) side, and piston (7) is equipped with spring (6) in the hole; The small column of first valve body (1) entrance point has outside thread, and an O RunddichtringO (2) is equipped with in the screw thread bottom; Second valve body (14) center has shoulder hole; Second filter screen (12) is installed in the ladder aperture; Second filter screen (12) is outwards installed throttling porose disc (10) successively towards the ladder macropore; The outer groove surface of porose disc is equipped with the 2nd O RunddichtringO (13); Porose disc is contained in the macropore of second retainer (11), and second retainer (11) is contained in the ladder macropore, and second retainer (11) small end is enclosed within spring (6) hole and is installed in second rubber ring (8) on second retainer (11) external cylindrical surface; The small column of the outlet end of second valve body has outside thread; It is whole that first valve body (1), second valve body (14) use bolt affixed; Gas successively from the inlet flow of first valve body (1) through between first filter screen (3), first retainer (5) center hole, piston (7) and first retainer (5) end face axially behind annular space, second retainer (11) center hole, porose disc (10) throttle orifice and second filter screen (12) between gap, piston (7) and first valve body (1), from the outlet outflow of the ladder aperture of second valve body (14).
2. according to the described a kind of automatic control pressure vent that is used for hydraulic system of claim 1; It is characterized in that: be provided with the groove that can embed the 2nd O RunddichtringO (13) in the middle of its periphery of described porose disc (10), the big center hole in porose disc two ends is communicated with through the centromere discharge orifice.
CN2011202794854U 2011-08-03 2011-08-03 Automatic exhaust valve for hydraulic system CN202203219U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202794854U CN202203219U (en) 2011-08-03 2011-08-03 Automatic exhaust valve for hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202794854U CN202203219U (en) 2011-08-03 2011-08-03 Automatic exhaust valve for hydraulic system

Publications (1)

Publication Number Publication Date
CN202203219U true CN202203219U (en) 2012-04-25

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ID=45967341

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011202794854U CN202203219U (en) 2011-08-03 2011-08-03 Automatic exhaust valve for hydraulic system

Country Status (1)

Country Link
CN (1) CN202203219U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102252008A (en) * 2011-08-03 2011-11-23 浙江大学 Automatic vent valve for hydraulic system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102252008A (en) * 2011-08-03 2011-11-23 浙江大学 Automatic vent valve for hydraulic system
CN102252008B (en) * 2011-08-03 2013-06-26 浙江大学 Automatic vent valve for hydraulic system

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C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20120425

Effective date of abandoning: 20130626

RGAV Abandon patent right to avoid regrant