CN108131345A - A kind of high-damping direct-acting overflow valve - Google Patents
A kind of high-damping direct-acting overflow valve Download PDFInfo
- Publication number
- CN108131345A CN108131345A CN201711391941.2A CN201711391941A CN108131345A CN 108131345 A CN108131345 A CN 108131345A CN 201711391941 A CN201711391941 A CN 201711391941A CN 108131345 A CN108131345 A CN 108131345A
- Authority
- CN
- China
- Prior art keywords
- damping
- spool
- valve
- valve body
- mouthfuls
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
Abstract
The invention discloses a kind of high-damping direct-acting overflow valves, include valve body, the lower end of valve body vertically offers P mouthfuls, T mouthfuls are offered on the lower sides of valve body, valve port is formed between P mouthfuls and T mouthfuls, it is vertically provided in valve body and the matched spool of valve port, the spool is provided centrally with through flow hole, the top of spool is arranged with damping sleeve, the damping sleeve is provided centrally with damping plunger, plunger is damped to be inserted into through flow hole, there are damping clearances between the outer wall of damping plunger and the inner wall of through flow hole, damping cavity is formed between the upper surface of spool and damping sleeve, the damping cavity is connected through through flow hole with P mouthfuls, it is provided with and the matched spring of spool outside damping sleeve.It the advantage is that：It is compact-sized, using pressure caused by damping cavity, while ensureing the conveyance capacity of valve, the required rigidity of spring is greatly reduced, so as to greatly reduce the overall volume of valve, and oil pressure adjusting is carried out using damping cavity, stationarity when can ensure to open and close.
Description
Technical field
The present invention relates to overflow valve manufacturing technology field, a kind of especially high-damping direct-acting overflow valve.
Background technology
Overflow valve is common pressure control valve in hydraulic system, can be used as level pressure overflow valve or safety valve.Overflow valve
Be generally used for pressure control aspect, and existing overflow valve is different by structure and operation principle, can be divided into direct-acting overflow valve and
Pilot operated compound relief valve.Although direct-acting overflow valve has many advantages, such as simple in structure, high sensitivity, because unlike pilot-operated type overflows
Stream valve sets multiple dampings like that, therefore usually when inlet pressure fluctuates big application, spool can generate vibration, thus causes
It utters long and high-pitched sounds, larger damage is caused to valve seat and spring；In addition in big flow in application, the flow in order to ensure overflow is pressed adjusting
Power will not cause too much influence, and the aperture of valve seat will be made big, therefore the pressure spring rigidity usually to be designed is very big, makes
Integral direct-acting overflow valve volume is excessive.
Such as application No. is 201310162724.1, the patent of invention of entitled " a kind of direct-acting overflow valve " discloses one kind
Direct-acting overflow valve mainly includes valve pocket, valve seat, poppet valve core, compression spring, regulator and first seal, the invention
Although simple in structure directly control inlet pressure by poppet valve core and compression spring, it lacks damping element, in inlet flow
In the case of amount and pressure oscillation, the state in up-down vibration is caused system pressure fluctuation, noise and reduces it by poppet valve core
The service life of operation element.
Invention content
The technical problem to be solved by the invention for the present situation of prior art is to provide compact-sized, small, operations
A kind of stable high-damping direct-acting overflow valve.
Technical solution is used by the present invention solves above-mentioned technical problem：
A kind of high-damping direct-acting overflow valve includes valve body, and the lower end of valve body vertically offers P mouthfuls, the lower part of valve body
T mouthfuls are offered on side wall, valve port is formed between P mouthfuls and T mouthfuls, be vertically provided in valve body with the matched spool of valve port, should
Spool is provided centrally with through flow hole, and the top of spool is arranged with damping sleeve, which is provided centrally with damping plunger, resistance
Buddhist nun's plunger is inserted into through flow hole, is damped between the outer wall of plunger and the inner wall of the through flow hole there are damping clearance, spool it is upper
Be formed with damping cavity between end face and the damping sleeve, which is connected through through flow hole with P mouthfuls, be provided with outside damping sleeve with
The matched spring of spool.
The technical measures of optimization further include：
Regulator bolts are provided in the top of above-mentioned valve body, the upper end of spring offsets with the regulator bolts.
Convex body is provided in the middle part of above-mentioned spool, the lower end of spring and the upper surface of the convex body offset.
It is located on above-mentioned spool below the convex body and is provided with tapered portion, tapered portion is matched with valve port.
The lower part of above-mentioned through flow hole is provided with undergauge section.
The lower end of above-mentioned through flow hole, which is expanded, is formed with bellmouth.
Bolt seal circle is provided between above-mentioned regulator bolts and the valve interior wall.
In in the valve body, the central upper portion of regulator bolts is provided with Hexagon hole for above-mentioned regulator bolts entirety precession.
The upper end of above-mentioned valve body, which is located above the regulator bolts, is provided with limit stop ring.
It is formed with external screw thread on the outer wall of above-mentioned valve body, the externally threaded top is provided with valve seal on valve body
Circle.
A kind of high-damping direct-acting overflow valve of the present invention, it is compact-sized, it is small；It in spool by being provided centrally with
Through flow hole, and damping sleeve is arranged on spool top, the damping plunger at the center of damping sleeve is inserted into through flow hole, the upper end of spool
Damping cavity is formed between face and damping sleeve, is damped between the outer wall of plunger and the inner wall of through flow hole there are damping clearance, so
Form high-damping structure；Fluid enters from through flow hole and generates downward pressure in damping cavity to spool, and P mouthfuls of oil pressure is to valve
Core generates upward power, spool is pushed to move upwards and open valve under the pressure of the two, is ensureing the same of the conveyance capacity of valve
When, the required rigidity of spring is greatly reduced, the overall volume of valve can be greatly reduced, and oil pressure tune is carried out using damping cavity
Section, stationarity when can ensure to open and close.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is A portions enlarged drawing in Fig. 1；
Fig. 3 is B portions enlarged drawing in Fig. 1.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
Structure diagram for the present invention as shown in Figure 1 to Figure 3,
Reference numeral therein is：P mouthfuls, T mouthfuls, valve body 1, external screw thread 11, valve seals 12, spool 2, through flow hole 21,
Undergauge section 21a, bellmouth 21b, convex body 22, tapered portion 23, damping sleeve 3, damping cavity 3a, damping plunger 4, damping clearance 4a, bullet
Spring 5, regulator bolts 6, bolt seal circle 61, Hexagon hole 62, limit stop ring 7.
As shown in Figure 1 to Figure 3,
A kind of high-damping direct-acting overflow valve, includes valve body 1, and the lower end of valve body 1 vertically offers P mouthfuls, under valve body 1
T mouthfuls are offered on portion's side wall, valve port is formed between P mouthfuls and T mouthfuls, is vertically provided in valve body 1 and the matched spool of valve port
2, which is provided centrally with through flow hole 21, and the top of spool 2 is arranged with damping sleeve 3, which is provided centrally with
Damp plunger 4, damping plunger 4 be inserted into through flow hole 21 in, damp plunger 4 outer wall and the through flow hole 21 inner wall between there are
Damping clearance 4a is formed with damping cavity 3a between the upper surface of spool 2 and the damping sleeve 3, damping cavity 3a is through through flow hole 21
It is connected with P mouthfuls, is provided with and the 2 matched spring 5 of spool outside damping sleeve 3.
In embodiment, regulator bolts 6 are provided in the top of valve body 1, the upper end of spring 5 offsets with the regulator bolts 6.
In embodiment, the middle part of spool 2 is provided with convex body 22, and the lower end of spring 5 and the upper surface of the convex body 22 offset.
In embodiment, the lower section of the convex body 22 is provided with tapered portion 23 on spool 2, tapered portion 23 matches with valve port
It closes.
In embodiment, the lower part of through flow hole 21 is provided with undergauge section 21a.
In embodiment, the lower end of through flow hole 21, which is expanded, is formed with bellmouth 21b.
The setting of undergauge section 21a can further improve damping, and the operation of valve is made more to stablize；And bellmouth 21b then can
Cushioning effect is enough played, avoids the instantaneous variation of oil pressure.
In embodiment, bolt seal circle 61 is provided between 1 inner wall of regulator bolts 6 and the valve body.
In embodiment, for the whole precession of regulator bolts 6 in the valve body 1, the central upper portion of regulator bolts 6 is provided with interior six
Corner apertures 62.
In embodiment, the top that the upper end of valve body 1 is located at the regulator bolts 6 is provided with limit stop ring 7.
By the adjusting of 6 upper-lower position of regulator bolts, it can achieve the purpose that the pretightning force of adjustment spring 5, so as to overflowing
The Opening pressure of stream valve is adjusted；The Hexagon hole 62 set by the central upper portion of regulator bolts 6, can easily twist
Dynamic regulator bolts 6, so as to adjust its position.The limit stop ring 7 of upper end limits the upper limit of 6 position of regulator bolts adjustment.
In embodiment, external screw thread 11 is formed on the outer wall of valve body 1, is provided on valve body 1 in the top of the external screw thread 11
Valve seals 12.
When this overflow valve is installed, installation position is bolted in by external screw thread 11, and the setting of valve seals 12 ensure that
Leakproofness between valve body 1 and installation position.
Operation principle：
This direct-acting overflow valve is provided centrally with through flow hole 21, the upper end of the through flow hole 21 and damping cavity in spool 2
3a is connected, and damping sleeve 3 is arranged on the top of spool 2, and the damping plunger 4 at 3 center of damping sleeve is inserted into through flow hole 21, resistance
There are damping clearance 4a between the outer wall of Buddhist nun's plunger 4 and the inner wall of through flow hole 21；P mouthfuls of fluid enters damping through through flow hole 21
In chamber 3a, in damping cavity 3a formed oil pressure and downward power is generated to spool 2, and P mouthfuls of fluid spool 2 is generated it is upward
Power, it is assumed that P mouthfuls of a diameter of D1, a diameter of D2 on 2 top of spool, the active area that such oil pressure pushes up spool 2 upwards are practical
For the annulus area that D1 and D2 is formed, it can either ensure larger conveyance capacity in this way, bullet is greatly reduced further through annulus area
The required rigidity of spring 5, so as to greatly reduce the overall volume of overflow valve.Between the outer diameter on 2 top of endoporus and spool of damping sleeve 3
It is sealed for interstitial fluid, the lower part of spool 2 is with P mouthfuls of endoporus to be slidably matched, it is ensured that moves not unstability.
When the thrust that P mouthfuls of pressure is applied to above-mentioned annulus area generation is enough to overcome the active force of spring 5, spool 2
The valve port started to open between P mouthfuls and T mouthfuls is moved up, with moving up for spool 2, the space of damping cavity 3a reduces, resistance
The fluid of Buddhist nun's chamber 3a is discharged from damping clearance 4a, so that the unlatching of spool 2 is steadily to open, and will not generate existing market
On direct acting overflow valve before this suddenly open cause overflow valve overflow excessive, the pressure oscillations state then turned down suddenly again.When
Spool 2 is had been switched in an equilibrium state, when P mouthfuls of pressure generate fluctuation, if P mouthfuls of pressure fluctuate, and upper upwards
State that opening process is the same, spool 2 continues up athletic meeting and produces when the fluid of damping cavity 3a is discharged by damping clearance 4a
Raw stronger damping；If P mouthfuls of pressure fluctuate downwards, spool 2 moves downward, then can increase the volume of damping cavity 3a, causes to damp
The pressure of chamber 3a declines, and reduces so as to make to act on active force downward on spool 2, and P mouthfuls of fluid, can be through under differential pressure action
Through flow hole 21 flows into damping cavity 3a, this is also required to by damping clearance 4a in the process, also there is damping action, therefore it is also flat to close
Slow.
Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not
It can depart from the scope of the present invention.
Claims (10)
1. a kind of high-damping direct-acting overflow valve includes valve body (1), the lower end of the valve body (1) vertically offers P mouthfuls,
T mouthfuls are offered on the lower sides of the valve body (1), valve port is formed between P mouths and T mouthfuls, it is characterized in that：It is described
Valve body (1) in be vertically provided with and be provided centrally with through flow hole (21), institute with the matched spool of valve port (2), the spool (2)
The top of spool (2) stated is arranged with damping sleeve (3), which is provided centrally with damping plunger (4), damps plunger
(4) it is inserted into through flow hole (21), there are dampings between the outer wall of damping plunger (4) and the inner wall of the through flow hole (21)
Gap (4a) is formed with damping cavity (3a), the damping cavity between the upper surface of the spool (2) and the damping sleeve (3)
(3a) is connected through through flow hole (21) with P mouthfuls, is provided with and the spool (2) matched spring outside the damping sleeve (3)
(5)。
2. a kind of high-damping direct-acting overflow valve according to claim 1, it is characterized in that：The top of the valve body (1)
Regulator bolts (6) are inside provided with, upper end and the regulator bolts (6) of the spring (5) offset.
3. a kind of high-damping direct-acting overflow valve according to claim 2, it is characterized in that：The middle part of the spool (2)
Convex body (22) is provided with, the lower end and the upper surface of the convex body (22) of the spring (5) offset.
4. a kind of high-damping direct-acting overflow valve according to claim 3, it is characterized in that：It is located on the spool (2)
Tapered portion (23) is provided with below the convex body (22), the tapered portion (23) is matched with valve port.
5. a kind of high-damping direct-acting overflow valve according to claim 4, it is characterized in that：Under the through flow hole (21)
Portion is provided with undergauge section (21a).
6. a kind of high-damping direct-acting overflow valve according to claim 5, it is characterized in that：Under the through flow hole (21)
End, which is expanded, is formed with bellmouth (21b).
7. a kind of high-damping direct-acting overflow valve according to claim 6, it is characterized in that：The regulator bolts (6) with
Bolt seal circle (61) is provided between valve body (1) inner wall.
8. a kind of high-damping direct-acting overflow valve according to claim 7, it is characterized in that：The regulator bolts (6) are whole
In the valve body (1), the central upper portion of the regulator bolts (6) is provided with Hexagon hole (62) for body precession.
9. a kind of high-damping direct-acting overflow valve according to claim 8, it is characterized in that：The upper end of the valve body (1)
Limit stop ring (7) is provided with above the regulator bolts (6).
10. a kind of high-damping direct-acting overflow valve according to claim 9, it is characterized in that：The outer wall of the valve body (1)
On be formed with external screw thread (11), valve seals (12) are provided with above the external screw thread (11) on the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391941.2A CN108131345B (en) | 2017-12-21 | 2017-12-21 | A kind of high-damping direct-acting overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391941.2A CN108131345B (en) | 2017-12-21 | 2017-12-21 | A kind of high-damping direct-acting overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108131345A true CN108131345A (en) | 2018-06-08 |
| CN108131345B CN108131345B (en) | 2019-12-03 |
Family
ID=62391161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711391941.2A Active CN108131345B (en) | 2017-12-21 | 2017-12-21 | A kind of high-damping direct-acting overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108131345B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795033A (en) * | 2020-07-16 | 2020-10-20 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN112534168A (en) * | 2019-04-20 | 2021-03-19 | 川崎重工业株式会社 | Pressure relief valve |
| CN114439803A (en) * | 2022-02-14 | 2022-05-06 | 天津市天锻压力机有限公司 | Be applied to novel prefill valve of quick forging hydraulic press |
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| CN103615424A (en) * | 2013-12-09 | 2014-03-05 | 怀特(中国)驱动产品有限公司 | Direct-operated-type hydraulic threaded insertion buffer overflow valve |
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| CN106438549A (en) * | 2016-12-08 | 2017-02-22 | 燕山大学 | Direct-acting overflow valve |
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| CN1563764A (en) * | 2004-04-16 | 2005-01-12 | 华中科技大学 | Middle high pressure directly-acting hydraulic overflow valve |
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| CN104214156A (en) * | 2014-08-20 | 2014-12-17 | 海门市油威力液压工业有限责任公司 | High-flow ultrahigh-pressure directly operated type proportional overflow valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112534168A (en) * | 2019-04-20 | 2021-03-19 | 川崎重工业株式会社 | Pressure relief valve |
| CN111795033A (en) * | 2020-07-16 | 2020-10-20 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN111795033B (en) * | 2020-07-16 | 2022-06-24 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN114439803A (en) * | 2022-02-14 | 2022-05-06 | 天津市天锻压力机有限公司 | Be applied to novel prefill valve of quick forging hydraulic press |
Also Published As
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|---|---|
| CN108131345B (en) | 2019-12-03 |
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Effective date of registration: 20191106 Address after: 100055 Guidu International Center A-1301, 27 Nanbinhe Road, Xicheng District, Beijing Applicant after: Jieruite Elastic Damping Body Technology Research Center, Beijing Address before: 100072 room 602, door 1, floor 3, No. 44, dujiakan, Changxindian, Fengtai District, Beijing Applicant before: Wu Yibing |
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