CN103225523A - A sealing assembly of an exhaust valve stem used for an engine in high temperature and high pressure - Google Patents
A sealing assembly of an exhaust valve stem used for an engine in high temperature and high pressure Download PDFInfo
- Publication number
- CN103225523A CN103225523A CN2013100372955A CN201310037295A CN103225523A CN 103225523 A CN103225523 A CN 103225523A CN 2013100372955 A CN2013100372955 A CN 2013100372955A CN 201310037295 A CN201310037295 A CN 201310037295A CN 103225523 A CN103225523 A CN 103225523A
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- China
- Prior art keywords
- ring body
- valve
- axial end
- sealing gland
- shoulder
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
A sealing assembly of an exhaust valve stem is provided. The sealing assembly of the exhaust valve stem comprises a housing and an elastic sealing member connected with the housing. The elastic sealing member comprises a stem sealing portion used for sealing the exhaust valve stem. The stem sealing portion comprises a gas sealing lip extended radially and inwardly. The housing (32) comprises a frustum-shaped shoulder portion which is extended to a distal edge radially and inwardly in a manner facing the valve axis. The frustum-shaped shoulder portion limits the angle of a plane vertical to the valve axis, wherein the angle is between 5 and 45 degree. The distal edge of the frustum-shaped shoulder portion is disposed on the back of the gas sealing lip and is basically aligned to the gas sealing lip along the valve axis.
Description
Technical field
The present invention is broadly directed to a kind of exhasut valve stem black box that is used for explosive motor.
Background technique
In some explosive motors, the valve guide is positioned in the cylinder head of explosive motor, with directing exhaust gas valve in to-and-fro motion.The bar of support of valve guide and directing exhaust gas valve is used for axially moving along the valve shaft line.Between valve guide and exhasut valve stem, provide the gap, so that allow the unrestricted motion between valve guide and the exhasut valve stem.The rod seal assembly is attached to the valve guide, and seals up exhasut valve stem, escapes by the gap between exhasut valve stem and the valve guide to prevent combustion gas.The exhasut valve stem black box further with oily dosage to the valve guide, with lubricated between valve lever and valve guide.
The rod seal assembly generally includes the Steel Sheel of support elastic Sealing.When bearing high temperature and high exhaust pressure, elastomer seal expands.This thermal expansion of elastomer seal has reduced elastomer seal and has kept oil to flow to the ability of valve guide, and this may cause the excessive wear of valve guide.
Summary of the invention
A kind of black box that is used for the exhasut valve stem of motor is provided.Described black box comprises housing, and described housing has the ring body part, and described ring body part is extended between first axial end and second axial end along the valve axis.The ring body part further limits inside.Elastomer seal is attached to housing.Elastomer seal comprises guide hermetic unit, rod seal part and shoulder part.The inside that the guide hermetic unit is arranged on the ring body part is used for the engage valve guide.The rod seal part is extended second axial end that leaves housing and ring body part along the valve axis, is used to engage valve rod.Partly interconnect guide hermetic unit and approach the rod seal part of second axial end of ring body part of shoulder.The stem seal branch comprises the sealing gland lip, and described sealing gland lip radially inwardly extends and extends towards ring body first axial end partly towards the valve axis.Limit cavity between the shoulder part of elastomer seal and the sealing gland lip.Housing comprises the frustoconical shoulder, and described frustoconical shoulder extends to the remote edge of frustoconical shoulder from second axial end of ring body part.The frustoconical shoulder radially inwardly extends and extends first axial end that leaves the ring body part towards the valve axis.
A kind of exhasut valve stem black box that is used for motor is provided.Described exhasut valve stem black box comprises housing, and described housing has the ring body part, and described ring body part is extended between first axial end and second axial end along the valve axis.Ring body partly limits inside.Elastomer seal is attached to housing.Elastomer seal comprises guide hermetic unit, rod seal part and shoulder part.The guide hermetic unit is arranged in the inside of ring body part, is used for the engage valve guide.The rod seal part is extended second axial end that leaves housing and ring body part along the valve axis, is used to engage valve rod.Shoulder partly interconnect guide hermetic unit and rod seal part.The stem seal branch comprises the sealing gland lip, and described sealing gland lip radially inwardly extends towards the valve axis and towards ring body first axial end partly.Limit cavity between the shoulder part of elastomer seal and the sealing gland lip.Housing comprises the frustoconical shoulder, and described frustoconical shoulder extends to remote edge from second axial end of ring body part.The frustoconical shoulder towards the valve axis radially inwardly extend and extend leave ring body part first axial end to remote edge.The remote edge of frustoconical shoulder is along valve axis and sealing gland lip substantial alignment.The frustoconical shoulder defines with respect to the angle perpendicular to the plane of valve axis, and described angle is between the scope of 5 ° and 45 °.
Correspondingly, the frustoconical shoulder of housing is angled towards the sealing gland lip from the ring body of housing part, and extends to the remote edge of frustoconical shoulder from second axial end of ring body part, and described remote edge just is positioned at the back of sealing gland lip.So, when the rod seal part of elastomer seal expands in response to high temperature and high pressure, the remote edge of frustoconical shoulder plays the effect of hinge or pivot, partly expand and rotate the bar that leaves outlet valve with the rod seal that allows elastomer seal, thereby keep the suitable shape and the configuration of sealing gland lip, and prevent that the cavity that is positioned at sealing gland lip back from caving in.Suitable shape by keeping the sealing gland lip and configuration and by preventing that cavity from caving in, lubricant oil dosage suitably enter gap between valve guide and the exhasut valve stem through the sealing gland lip, are used for lubricated between the two.
From hereinafter to the detailed description of the drawings attached of realizing optimal mode of the present invention as can be known, above-mentioned feature of the present invention and advantage and other features and advantage are clearly.
Description of drawings
Fig. 1 is the schematic partial section of exhasut valve stem black box, and described exhasut valve stem black box sealing is against the valve rod that is supported by the valve guide.
Fig. 2 is the schematic sectional view of exhasut valve stem black box.
Fig. 3 is the schematic amplification fragment sectional view of exhasut valve stem Sealing.
Embodiment
Those skilled in the art will recognize that, such as " on ", term such as D score, " making progress ", " downwards ", " top ", " end " is to be used to describe accompanying drawing, do not represent the restriction to scope of the present invention, scope of the present invention is limited to the appended claims.
With reference to the accompanying drawings, wherein identical reference character is indicated identical parts in some width of cloth views, and black box roughly shows at 20 places.Black box 20 can be described as exhasut valve stem black box 20.
With reference to figure 1, valve guide 22 is arranged in the hole 23 of cylinder head 24.Valve guide 22 defines center hole 25, and described center hole 25 supports the bar 26 of outlet valve 28 slidably, is used for along the to-and-fro motion of valve axis 30.Valve axis 30 is along the longitudinal center location of bar 26.Black box 20 connects or is attached to valve guide 22.
Also with reference to figure 2 and 3, black box 20 comprises the housing 32 of support elastic Sealing 34.Housing 32 comprises ring body part 36, and described ring body part 36 is extended between first axial end 38 of ring body part 36 and second axial end 40 along valve axis 30.Ring body part 36 comprises the general tube shape shape, and limits inner 42.Housing 32 comprises frustoconical shoulder 44, and described shoulder 44 extends to remote edge 46 from second axial end 40 of ring body part 36.Frustoconical shoulder 44 extends radially inwardly towards valve axis 30, and also extends to remote edge 46 away from first axial end 38 of ring body part 36.Frustoconical shoulder 44 comprises frustoconical shape, and it roughly is restricted to the conical in shape of having removed the vertex of a cone.Comprise flat cross section although frustoconical shoulder 44 is shown as, it should be understood that frustoconical shoulder 44 replacedly comprises the sectional shape of slight curvature, such as, but be not limited to protruding a little sectional shape.Flange 48 extends radially outwardly from first axial end 38 of ring body part 36 and leaves valve axis 30.
With reference to figure 3, roughly 49 settings of the cross section of frustoconical shoulder 44 along the plane.Plane 49 is provided with respect to the plane 50 perpendicular to valve axis 30, with predetermined angle between it 52.The plane 49 of frustoconical shoulder 44 and the angle 52 between the plane 50 are preferably between the scope of 5 ° and 45 °.Housing 32 can comprise metal and by the metal manufacturing, such as, but be not limited to steel.Yet, housing 32 can be by some other suitable made.
Shown in Fig. 3 was preferable, rod seal part 56 comprised sealing gland lip (gas lip) 64.64 sealings of sealing gland lip are passed through the bar 26 and the escape of the interface between the valve guide 22 of outlet valve 28 against the bar 26 of outlet valve 28 to prevent gas.Although sealing gland lip 64 prevents gas and escape along arrow 66 indicated directions, sealing gland lip 64 allows lubricant oil along the direction process opposite with arrow 66, with the bar 26 of lubricated outlet valve 28 and the interface between the valve guide 22.Sealing gland lip 64 extends radially inwardly towards valve axis 30, and extends towards first axial end 38 of ring body part 36.Sealing gland lip 64 is separated with the shoulder part 58 of elastomer seal 34, to limit the cavity 68 between sealing gland lip 64 and the shoulder part 58.
Shown in Fig. 3 was preferable, the remote edge 46 of frustoconical shoulder 44 was positioned as along valve axis 30 and roughly aligns with sealing gland lip 64.In other words, the remote edge 46 of frustoconical shoulder 44 be arranged on sealing gland lip 64 radially to side, and be arranged on along valve axis 30 about identical axial positions with sealing gland lip 64.Preferably, the remote edge 46 of frustoconical shoulder 44 is in the axial distance of the sealing gland lip 64 that records along valve axis 30.Described axial distance equals bottom margin or the top of lower limb 78 and cavity 68 or two times of the distance 76 between the top edge 80 at the sealing gland lip 64 that record along valve axis 30.Preferably, but not necessarily, first axial end 38 of the lower surface 82 of the remote edge 46 of frustoconical shoulder 44 and ring body is spaced apart 70, and described distance 70 is equal to or less than the distance 72 between first axial end 38 of the lower limb 84 of base portion of sealing gland lip 64 and ring body in acceptable manufacturing tolerances.The base portion of sealing gland lip 64 is approximate location that sealing gland lip 64 is attached to rod seal part 56 and extends from rod seal part 56, and it is roughly by dotted line 74 indications.
By sealing gland lip 64 being positioned at along the remote edge 46 about identical axial positions of valve axis 30 with frustoconical shoulder 44, remote edge 46 plays the effect of hinge or pivot, rotates up and leave housing 32 to allow rod seal part 56.More specifically, radially outward leaves first axial end, 38 rotations that valve axis 30 also axially leaves the ring body part 36 of housing 32 to the rod seal part 56 of frustoconical shoulder 44 permission elastomer seals 34 in response to the thermal expansion of elastomer seal 34.Allow rod seal part 56 to rotate in this way and kept the bar 26 of outlet valve 28 and the pressure and the contact width of the substantial constant between the sealing gland lip 64, this has kept the proper function of sealing gland lip 64 in the high temperature and high pressure environment.
Detailed description and drawings or view are to support of the present invention and description, but protection scope of the present invention is only limited by claim.Although carried out detailed description to carrying out better model of the present invention, those skilled in the art can learn that being used in the scope of appended claim implement many replacement designs of the present invention and embodiment.
The cross reference of related application
It is the preference of the U.S. Provisional Patent Application sequence number 61/592,174 on January 30th, 2012 that the application requires the applying date, and its disclosed content is merged in by reference at this.
Claims (8)
1. black box that is used for the exhasut valve stem of motor, the sealing assembly comprises:
Housing has the ring body part, and described ring body part is extended between first axial end and second axial end along the valve axis, and limits inside;
Elastomer seal, be attached to described housing and comprise guide hermetic unit, rod seal part and shoulder part, described guide hermetic unit is arranged in the ring body inside partly with the engage valve guide, described rod seal part is extended second axial end that leaves housing and ring body part engaging valve rod along the valve axis, described shoulder partly interconnect guide hermetic unit and rod seal part;
Wherein the stem seal branch comprises the sealing gland lip, and described sealing gland lip extends radially inwardly and extends towards first axial end of ring body part towards the valve axis, and described rod seal part limits cavity at the shoulder of sealing gland lip and elastomer seal between partly; And
Its middle shell comprises the frustoconical shoulder, and described frustoconical shoulder radially inwardly extends and extends to remote edge away from first axial end of ring body part towards the valve axis from second axial end of ring body part.
2. black box as claimed in claim 1, wherein the remote edge of frustoconical shoulder is along valve axis and sealing gland lip substantial alignment.
3. black box as claimed in claim 2, wherein along in the axial distance of valve axis, and wherein said axial distance equals along two times of the distance between the top edge of the lower limb of sealing gland lip and cavity of valve shaft centerline measurement the remote edge of frustoconical shoulder at the sealing gland lip.
4. black box as claimed in claim 1, wherein the cross section of frustoconical shoulder is provided with along the plane basically, and wherein the plane in the cross section of frustoconical shoulder limits an angle with respect to the plane perpendicular to the valve axis, and described angle is between the scope of 5 ° and 45 °.
5. black box as claimed in claim 1, wherein the frustoconical shoulder is configured to allow the rod seal part of elastomer seal to leave the valve axis radially outwardly in response to the thermal expansion of elastomer seal and axially leaves first axial end rotation of the ring body part of housing, to keep the pressure and the contact width of substantial constant between sealing gland lip and the valve rod.
6. black box as claimed in claim 1, wherein first axial end of the remote edge of frustoconical shoulder and ring body separates a distance, and this distance is equal to or less than the distance between first axial end of the base portion of sealing gland lip and ring body.
7. black box as claimed in claim 1, its middle shell comprises metal and is made of metal.
8. black box as claimed in claim 1, wherein elastomer seal comprises elastomer and is made by elastomer.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261592174P | 2012-01-30 | 2012-01-30 | |
| US61/592,174 | 2012-01-30 | ||
| US13/427,180 | 2012-03-22 | ||
| US13/427,180 US20130192555A1 (en) | 2012-01-30 | 2012-03-22 | Engine exhaust valve stem seal for high temperature and pressure applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103225523A true CN103225523A (en) | 2013-07-31 |
Family
ID=48783905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100372955A Pending CN103225523A (en) | 2012-01-30 | 2013-01-30 | A sealing assembly of an exhaust valve stem used for an engine in high temperature and high pressure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103225523A (en) |
| DE (1) | DE102013201033A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0566059A1 (en) * | 1992-04-14 | 1993-10-20 | RFT S.p.A. | Seal for a rod sliding against the action of elastic means, in particular an internal combustion engine valve stem |
| CN1412463A (en) * | 2001-10-18 | 2003-04-23 | Skf股份公司 | Valve stem seal |
| CN2603209Y (en) * | 2003-02-11 | 2004-02-11 | 青岛基珀密封工业有限公司 | Fuel-saving oil seal for valve stem guide |
| US20070278441A1 (en) * | 2006-06-01 | 2007-12-06 | Leimer Mark A | Articulating guide seal |
| CN202047877U (en) * | 2010-12-30 | 2011-11-23 | 广州汽车集团股份有限公司 | Oil seal structure of engine valve |
| CN202065025U (en) * | 2011-05-04 | 2011-12-07 | 宁国市瑞普密封件有限公司 | Valve oil seal with air sealing lip structure |
-
2013
- 2013-01-23 DE DE201310201033 patent/DE102013201033A1/en not_active Withdrawn
- 2013-01-30 CN CN2013100372955A patent/CN103225523A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0566059A1 (en) * | 1992-04-14 | 1993-10-20 | RFT S.p.A. | Seal for a rod sliding against the action of elastic means, in particular an internal combustion engine valve stem |
| CN1412463A (en) * | 2001-10-18 | 2003-04-23 | Skf股份公司 | Valve stem seal |
| CN2603209Y (en) * | 2003-02-11 | 2004-02-11 | 青岛基珀密封工业有限公司 | Fuel-saving oil seal for valve stem guide |
| US20070278441A1 (en) * | 2006-06-01 | 2007-12-06 | Leimer Mark A | Articulating guide seal |
| CN202047877U (en) * | 2010-12-30 | 2011-11-23 | 广州汽车集团股份有限公司 | Oil seal structure of engine valve |
| CN202065025U (en) * | 2011-05-04 | 2011-12-07 | 宁国市瑞普密封件有限公司 | Valve oil seal with air sealing lip structure |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013201033A1 (en) | 2013-08-01 |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20160601 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |