CN106439142A - Constant pressure control valve - Google Patents
Constant pressure control valve Download PDFInfo
- Publication number
- CN106439142A CN106439142A CN201610931579.2A CN201610931579A CN106439142A CN 106439142 A CN106439142 A CN 106439142A CN 201610931579 A CN201610931579 A CN 201610931579A CN 106439142 A CN106439142 A CN 106439142A
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- Prior art keywords
- valve
- pressure control
- sliding seat
- constant
- control valve
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- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a constant pressure control valve which comprises a valve base and a valve cover, wherein the valve base and the valve cover both have hollow chamber structures; a main through hole which is communicated with an inner chamber of the valve base is formed on the valve base; a first through hole which is communicated with the inner chamber of the valve cover is formed on the valve cover; a valve ball and a movable base are arranged in the inner chamber of the valve cover; a fluid channel which penetrates through the movable base is formed on the movable base; a second through hole which is communicated with the fluid channel is formed on a side wall of the movable base; a fixed sealing structure is formed between the valve cover and the valve base; a second level spring is arranged between the valve ball and the valve cover; a first level spring is arranged between the movable base and the valve base; contact sealing structures are respectively formed between the valve ball and the movable base and between the movable base and the valve cover. According to the invention, the valve ball, the movable base, the first level spring and the second level spring are matched with each other, so that the constant pressure control valve can automatically reduce pressure or increase pressure in time and the fluid pressure difference of the inlet end and outlet end of the constant pressure control valve under the constant state can be conveniently realized.
Description
Technical field
The present invention relates to fluid pressure control valve technical field, especially relate to can adjust pressure balanced one kind in time
Constant-pressure control valve.
Background technology
In the machinery being worked by means of Fluid pressure, it usually needs fluid pressure is adjusted in time, to protect
Normal, the efficient operation of card machinery, and extend its service life.For example, in engine timing chain drive system, need
Will be using to timing chain tensioner, this timing chain tensioner is by internal hydraulic pressure power buffer chain transmission process
Vibratory impulse, with impacting of reducing that each part in drive system is subject to, extends the service life of timing driving system it is ensured that transmission
Accurately with reliable, and reduce drive noise, improve the comfortableness driven.
But, in engine timing chain drive system work process, if during engine operating condition mutation, timing chain
Plunger in stretcher by severe impact, will make the high pressure intracavity of timing chain tensioner produce continuous high-pressure, this high pressure pressure
If power cannot discharge in time, great reversed load will be produced to timing chain, guide rail.Because guide rail of the prior art leads to
It is often to adopt made of plastic, its abrasion resistance and heat-resisting quantity are all far below the timing chain that metal is made, therefore, if started
Machine correct time chain driving system is chronically at and works under this operating mode of big shock loading, will make guide rail rubbed out groove or
Rugged surface, thus leading to the guidance quality of guide rail to be deteriorated, and then making the vibration aggravation in transmission for the timing chain, leading to
The operating mode of engine timing chain drive system is more unstable, and makes the abrasion aggravation of timing chain, guide rail, leads to electromotor
The working life of correct time chain driving system shortens.If timing chain elongates because of abrasion, it is possible that jumping tooth or breaking
Split risk, so that engine stop is worked or damage.
Content of the invention
The technical problem to be solved in the present invention is：The problem existing for prior art, provides a kind of constant-pressure control valve, when
When the difference of the Fluid pressure at its import and export end exceedes setting value, releasing pressure automatically or supercharging can be carried out in time so that its enter,
The difference of the Fluid pressure of the port of export is in steady state.
The technical problem to be solved in the present invention employs the following technical solutions to realize：A kind of constant-pressure control valve, including being
The valve seat of hollow cavity structure and valve gap, form, on valve seat, the main through hole communicating with its inner chamber, in formation and its on valve gap
The first through hole that chamber communicates, installs valve ball and sliding seat in valve gap inner chamber, described sliding seat forms the stream of insertion sliding seat
Body passage, forms the second through hole communicating with described fluid passage on the wall of sliding seat side；Formed between described valve gap and valve seat
Fixing seal structure, installs second level spring between valve ball and valve gap, installs first order spring between sliding seat and valve seat,
And between valve ball and sliding seat, formed respectively between sliding seat and valve gap and contact sealing structure.
Preferably, the rigidity of described second level spring is less than the rigidity of first order spring.
Preferably, the open gap between described valve ball and sliding seat is set to 0.2mm-0.6mm.
Preferably, flanging sealing is formed on described valve gap bottom, forms fixation close between described flanging sealing and valve seat
Seal structure.
Preferably, form the first positioning convex in described valve gap inner chamber, described first positioning convex and second level spring it
Between formed socket join structure.
Preferably, the outer surface of described first positioning convex is formed as convex spherical structure.
Preferably, described valve gap internal chamber wall is formed the first contact sealing, described sliding seat outer surface forms second
Contact sealing, described first contact sealing contacts with second and forms contact sealing structure in face between sealing.
Preferably, the first contact sealing on described valve gap internal chamber wall is cone structure, on described sliding seat outer surface
Second contact sealing be cone structure or spherical structure.
Preferably, the 3rd contact sealing is formed on described sliding seat top, between described 3rd contact sealing and valve ball
Formation face contacts sealing structure.
Preferably, the 3rd contact sealing at described sliding seat top is cone structure or concave spherical surface structure.
Compared with prior art, the invention has the beneficial effects as follows：Difference when the Fluid pressure at constant-pressure control valve import and export end
When exceeding setting value, by valve ball, sliding seat and first order spring, the cooperating of second level spring, both can make valve ball with
Keep sealing state and depressurization state between sliding seat and valve gap between sliding seat, so as constant-pressure control valve carry out in time from
Dynamic pressure release；Depressurization state can also be made between valve ball and sliding seat and between sliding seat and valve gap, keep sealing state, with
Just constant-pressure control valve carries out Automatic-boosting in time, it is therefore convenient to realize the fluid pressure at the import and export end of constant-pressure control valve
The difference of power is in steady state.
Brief description
Fig. 1 is the D structure figure of the timing chain tensioner with constant-pressure control valve.
Fig. 2 is the sectional view of the timing chain tensioner with constant-pressure control valve shown in Fig. 1.
Fig. 3 is a kind of D structure figure of constant-pressure control valve of the present invention.
Fig. 4 is a kind of Structure explosion diagram of constant-pressure control valve of the present invention.
Fig. 5 is a kind of sectional view of constant-pressure control valve of the present invention.
Fig. 6 is the sectional view of the valve gap in the constant-pressure control valve shown in Fig. 5.
Fig. 7 is the fundamental diagram (being in constant voltage working condition) of the timing chain tensioner with constant-pressure control valve.
Fig. 8 is the fundamental diagram (being in pressure release working condition) of the timing chain tensioner with constant-pressure control valve.
Fig. 9 is the fundamental diagram (being in supercharging working condition) of the timing chain tensioner with constant-pressure control valve.
In figure labelling：1- housing, 2- plunger, 3- latch, 4- back-moving spring, 5- stretcher high pressure chest, 6- constant-pressure control valve,
7- stretcher fuel feed hole, 61- valve ball, 62- valve seat, 63- valve gap, 64- first order spring, 65- sliding seat, 66- second level spring,
The main through hole of 621-, 631- first through hole, 632- first positioning convex, 633- first contact sealing, 634- flanging sealing,
651- second contacts sealing, and 652- the 3rd contacts sealing, 653- second through hole, 654- second positioning convex.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with the accompanying drawings and be embodied as
The present invention is described in detail for example.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not
For limiting the present invention.
Constant-pressure control valve as shown in Fig. 3, Fig. 4, Fig. 5, main inclusion is valve seat 62 and the valve gap of hollow cavity structure
63, the main through hole 621 being communicated with its inner chamber is formed on valve seat 62, the first through hole being communicated with its inner chamber is formed on valve gap 63
631；Preferably, described first through hole 631 can arrange several, and this several first through hole 631 is preferably ring valve lid 63
It is uniformly distributed.Valve ball 61 and sliding seat 65 are installed in valve gap 63 inner chamber, described sliding seat 65 forms insertion sliding seat 65
Fluid passage, forms the second through hole 653 communicating with described fluid passage on sliding seat 65 side wall；Preferably, described second
Through hole 653 can arrange several, and this several second through hole 653 is preferably ring sliding seat 65 and is uniformly distributed.Described valve gap 63
And valve seat 62 between, fixing seal structure is formed by interference fit；Preferably, as shown in fig. 6, leading in valve gap 63 bottom
Cross the flanging sealing 634 that flanging forms integral structure, joined by interference again between described flanging sealing 634 and valve seat 62
Conjunction mode forms fixing seal structure.Between valve ball 61 and valve gap 63, second level spring 66 is installed, in sliding seat 65 and valve seat
First order spring 64 is installed between 62.Shape respectively between described valve ball 61 and sliding seat 65, between sliding seat 65 and valve gap 63
Become contact sealing structure, that is, when contacting with each other between valve ball 61 and sliding seat 65, valve ball 61 covers the stream in sliding seat 65
Body passage, now, the position that contacts with each other between valve ball 61 and sliding seat 65 forms sealing state, and works as valve ball 61 and activity
When seat 65 is separated from each other, the sealing state between valve ball 61 and sliding seat 65 releases.Similarly, when sliding seat 65 and valve gap 63 it
Between when contacting with each other, the position that contacts with each other between valve gap 63 and sliding seat 65 forms sealing state, and works as valve gap 63 and live
When dynamic seat 65 is separated from each other, the sealing state between valve gap 63 and sliding seat 65 releases.
Below so that above-mentioned constant-pressure control valve is in the application in timing chain tensioner as a example, to illustrate the present invention's
The pressure Principles of Regulation of constant-pressure control valve.
Timing chain tensioner as shown in Figure 1 and Figure 2, main inclusion housing 1, plunger 2, back-moving spring 4 and Isobarically Control
Valve 6, described plunger 2 and housing 1 inner chamber coordinate and form oil pressure damping clearance, generally, described plunger 2 cylindrical with housing 1 in
The gap of 0.02mm-0.06mm is set between chamber；Form stretcher high pressure chest 5, in housing 1 between described plunger 2 and housing 1
Bottom of chamber portion fixedly mounts constant-pressure control valve 6, passes through interference fit side between the valve seat 62 in described constant-pressure control valve 6 and housing 1
Formula forms fixing seal structure, and the main through hole 621 on described constant-pressure control valve 6 is communicated with the stretcher fuel feed hole 7 on housing 1,
First through hole 631 on described constant-pressure control valve 6 is communicated with stretcher high pressure chest 5.Described back-moving spring 4 is arranged on Isobarically Control
Between valve 6 and plunger 2.
Described timing chain tensioner is applied in engine timing chain drive system, generally, is installing stretcher
Before, to limit plunger 2 and to eject using latch 3 and housing 1 cooperation, as shown in Fig. 2 after stretcher is installed in place, pulling out slotting
Pin 3, plunger 2 ejects with respect to housing 1 under the resilient force of back-moving spring 4, and holds out against engine timing chain transmission
Guide rail in system and reach working condition.In engine timing chain drive system work process, engine motor oil from
Tight device fuel feed hole 7 enters stretcher, and on plunger 2, the motion of described plunger 2 is reciprocal to effect of vibration produced by drive system
Motion.
As shown in figure 9, first setting main through hole 621 place end as the entrance point of constant-pressure control valve 6, set first through hole 631
Place end is the port of export of constant-pressure control valve 6.During engine work, between described valve ball 61 and sliding seat 65,
Formed respectively between sliding seat 65 and valve gap 63 and contact sealing state, now, engine motor oil will not enter from stretcher fuel feed hole 7
Enter stretcher high pressure chest 5, as shown in fig. 7, that is, the difference of the Fluid pressure at import and export end of described constant-pressure control valve 6 does not surpass
When crossing its setting value, the difference of the Fluid pressure at its import and export end is in steady state.
But, when engine operating condition mutation, when plunger 2 is with respect to housing 1 rearward movement, the volume of stretcher high pressure chest 5
Diminish, and produce malleation, so that the pressure in stretcher high pressure chest 5 is suddenly increased, the Fluid pressure of constant-pressure control valve 6 port of export be more than into
The Fluid pressure at mouth end, when the difference of the Fluid pressure at the import and export end of constant-pressure control valve 6 exceedes its setting value, stretcher is high
Hydraulic oil in pressure chamber 5 by first through hole 631 and will promote valve ball 61 to move down with respect to housing 1, then be pushed away by valve ball 61
Dynamic sliding seat 65 simultaneously compresses first order spring 64, and sliding seat 65 moves down with respect to housing 1 and departs from valve gap 63, now, valve
Sealing state between ball 61 and sliding seat 65 remains in that, and the sealing state between sliding seat 65 and valve gap 63 then releases,
Therefore, a pressure release passage, stretcher high pressure chest are defined between stretcher high pressure chest 5, first through hole 631, main through hole 621
Machine oil in 5 flowed through successively gap between first through hole 631, sliding seat 65 and valve gap 63, the second through hole 653 and enter
Fluid passage in sliding seat 65, then released by main through hole 621, as shown in figure 8, so that oil in stretcher high pressure chest 5
Drops, until return to setting value, to ensure that the pressure in stretcher high pressure chest 5 is in pressure constant state, now, Isobarically Control
The difference of the Fluid pressure at import and export end of valve 6 is also at steady state.
When engine operating condition mutation, when plunger 2 travels forward with respect to housing 1, the volume of stretcher high pressure chest 5 becomes big,
Pressure drop, when the pressure in stretcher high pressure chest 5 is less than setting value, the Fluid pressure of constant-pressure control valve 6 port of export is less than
The Fluid pressure of entrance point, when the difference of the Fluid pressure at the import and export end of constant-pressure control valve 6 exceedes its setting value, electromotor
Machine oil enters stretcher from stretcher fuel feed hole 7, and enters valve gap 63 by main through hole 621, promotes sliding seat 65 with respect to shell
Body 1 moves up, until between sliding seat 65 and valve gap 63 recover sealing state, engine motor oil after backing down valve ball 61, valve
Ball 61 compresses second level spring 66 and moves up with respect to housing 1, makes the sealing state solution between valve ball 61 and sliding seat 65
Remove, therefore, engine motor oil is able to through the fluid passage in sliding seat 65 and the gap between valve ball 61 and sliding seat 65
It is flowed in stretcher high pressure chest 5, as shown in figure 9, so that the oil pressure in stretcher high pressure chest 5 persistently raises, until recovering
To setting value, to ensure that the pressure in stretcher high pressure chest 5 is in pressure constant state, now, the import and export end of constant-pressure control valve 6
The difference of Fluid pressure be also at steady state.
In constant-pressure control valve 6 work process, in order to strengthen the kinetic stability of valve ball 61, and make second level spring 66,
The force value change of first order spring 64 is more steady, the first positioning convex 632 can be formed in valve gap 63 inner chamber it is preferable that
The outer surface of the first described positioning convex 632 is formed as convex spherical structure, as shown in fig. 6, described first positioning convex 632 with
Form socket join structure, such that it is able to carry out to second level spring 66 efficiently locating, spacing between second level spring 66.In addition,
The second positioning convex 654 can be formed in sliding seat 65 bottom it is preferable that described second positioning convex 654 adopts hollow circuit cylinder
Body structure, forms socket join structure between described second positioning convex 654 and first order spring 64, as shown in Figure 4, Figure 5, with more preferable
Ground carries out to first order spring 64 efficiently locating, spacing.
In order to strengthen the sealing property of constant-pressure control valve 6, improve the control accuracy of constant-pressure control valve 6, can be in valve gap 63
First contact sealing 633 is formed on internal chamber wall, as shown in fig. 6, the second contact sealing is formed on sliding seat 65 outer surface
651, and the first contact sealing 633 contacts contact sealing structure in formation face between sealing 651 with second, as shown in Figure 5.Excellent
Selection of land, described first contact sealing 633 is designed as cone structure, and described second contact sealing 651 is designed as cone structure
Or spherical structure.Similarly, the 3rd contact sealing 652, described 3rd contact sealing 652 are formed at sliding seat 65 top
Form face and contact sealing structure between valve ball 61.Preferably, described 3rd contact sealing 652 be designed as cone structure or
Concave spherical surface structure.In order to further improve the control accuracy of constant-pressure control valve 6, opening between described valve ball 61 and sliding seat 65
Open gap and it is preferably provided as 0.2mm-0.6mm, the rigidity of described second level spring 66 is preferably less than first order spring 64
Rigidity；In addition, using after such structure design, this timing chain tensioner with constant-pressure control valve can also be prevented well
Shift to an earlier date pressure release in the course of the work, so that it is guaranteed that the pressure in stretcher high pressure chest 5 is in pressure constant state.
It should be noted that the constant-pressure control valve of the present invention is not limited to apply in timing chain tensioner, it can also
It is applied to the workplace that other need fluid pressure to be adjusted in time, for example, in fluid line, by arranging this
Bright constant-pressure control valve, can make the difference of the Fluid pressure at import and export end of this constant-pressure control valve be maintained at steady state, thus
Advantageously ensure that the at the uniform velocity mobility of flow of fluid and the discharge stability in fluid line.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention it is noted that all
Any modification, equivalent and improvement of being made within the spirit and principles in the present invention etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (10)
1. a kind of constant-pressure control valve it is characterised in that：Including the valve seat (62) being hollow cavity structure and valve gap (63), in valve
Seat (62) above forms the main through hole (621) communicating with its inner chamber, above forms, in valve gap (63), the first through hole communicating with its inner chamber
(631), valve gap (63) inner chamber is installed valve ball (61) and sliding seat (65), described sliding seat (65) is upper to form insertion sliding seat
(65) fluid passage, forms the second through hole (653) communicating with described fluid passage on the wall of sliding seat (65) side；Described valve
Form fixing seal structure between lid (63) and valve seat (62), second level spring is installed between valve ball (61) and valve gap (63)
(66), between sliding seat (65) and valve seat (62), first order spring (64) is installed, and between valve ball (61) and sliding seat (65),
Formed respectively between sliding seat (65) and valve gap (63) and contact sealing structure.
2. a kind of constant-pressure control valve according to claim 1 it is characterised in that：The rigidity of described second level spring (66) is little
Rigidity in first order spring (64).
3. a kind of constant-pressure control valve according to claims 1 or 2 it is characterised in that：Described valve ball (61) and sliding seat
(65) open gap between is set to 0.2mm-0.6mm.
4. a kind of constant-pressure control valve according to claims 1 or 2 it is characterised in that：Described valve gap (63) bottom is formed
Flanging sealing (634), forms fixing seal structure between described flanging sealing (634) and valve seat (62).
5. a kind of constant-pressure control valve according to claims 1 or 2 it is characterised in that：Shape in described valve gap (63) inner chamber
Become the first positioning convex (632), between described first positioning convex (632) and second level spring (66), form socket join structure.
6. a kind of constant-pressure control valve according to claim 5 it is characterised in that：Outside described first positioning convex (632)
Surface is formed as convex spherical structure.
7. a kind of constant-pressure control valve according to claims 1 or 2 it is characterised in that：On described valve gap (63) internal chamber wall
Form the first contact sealing (633), described sliding seat (65) outer surface forms the second contact sealing (651), described the
One contact sealing (633) contacts with second and forms contact sealing structure in face between sealing (651).
8. a kind of constant-pressure control valve according to claim 7 it is characterised in that：On described valve gap (63) internal chamber wall first
Contact sealing (633) is cone structure, and the second contact sealing (651) on described sliding seat (65) outer surface is tied for the conical surface
Structure or spherical structure.
9. a kind of constant-pressure control valve according to claims 1 or 2 it is characterised in that：Described sliding seat (65) top shape
Become the 3rd contact sealing (652), form face between described 3rd contact sealing (652) and valve ball (61) and contact sealing knot
Structure.
10. a kind of constant-pressure control valve according to claim 9 it is characterised in that：The 3rd of described sliding seat (65) top
Contact sealing (652) is cone structure or concave spherical surface structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610931579.2A CN106439142A (en) | 2016-10-31 | 2016-10-31 | Constant pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610931579.2A CN106439142A (en) | 2016-10-31 | 2016-10-31 | Constant pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106439142A true CN106439142A (en) | 2017-02-22 |
Family
ID=58177383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610931579.2A Pending CN106439142A (en) | 2016-10-31 | 2016-10-31 | Constant pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106439142A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19632383A1 (en) * | 1995-08-18 | 1997-02-20 | Borg Warner Automotive | Combined hydraulic inlet and pressure relief valve |
| US5707309A (en) * | 1997-01-23 | 1998-01-13 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with modular inlet check valve with pressure relief |
| US20090197722A1 (en) * | 2008-01-31 | 2009-08-06 | Honda Motor Co., Ltd. | Tensioner for endless transmission belt and internal combustion engine having the tensioner |
| CN102128240A (en) * | 2010-01-20 | 2011-07-20 | Ntn株式会社 | Chain tightener |
| CN102252070A (en) * | 2010-05-21 | 2011-11-23 | 株式会社椿本链索 | Chain tensioner |
| CN206130228U (en) * | 2016-10-31 | 2017-04-26 | 绵阳富临精工机械股份有限公司 | Constant voltage control valve |
-
2016
- 2016-10-31 CN CN201610931579.2A patent/CN106439142A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19632383A1 (en) * | 1995-08-18 | 1997-02-20 | Borg Warner Automotive | Combined hydraulic inlet and pressure relief valve |
| US5707309A (en) * | 1997-01-23 | 1998-01-13 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with modular inlet check valve with pressure relief |
| US20090197722A1 (en) * | 2008-01-31 | 2009-08-06 | Honda Motor Co., Ltd. | Tensioner for endless transmission belt and internal combustion engine having the tensioner |
| CN102128240A (en) * | 2010-01-20 | 2011-07-20 | Ntn株式会社 | Chain tightener |
| CN102252070A (en) * | 2010-05-21 | 2011-11-23 | 株式会社椿本链索 | Chain tensioner |
| CN206130228U (en) * | 2016-10-31 | 2017-04-26 | 绵阳富临精工机械股份有限公司 | Constant voltage control valve |
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Application publication date: 20170222 |
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