CN104329500A - Gas valve conical surface sealing method with cold state angle difference - Google Patents
Gas valve conical surface sealing method with cold state angle difference Download PDFInfo
- Publication number
- CN104329500A CN104329500A CN201410549421.XA CN201410549421A CN104329500A CN 104329500 A CN104329500 A CN 104329500A CN 201410549421 A CN201410549421 A CN 201410549421A CN 104329500 A CN104329500 A CN 104329500A
- Authority
- CN
- China
- Prior art keywords
- air valve
- gas valve
- conical surface
- cold conditions
- valve seat
- 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.)
- Pending
Links
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
- F16K25/00—Details relating to contact between valve members and seat
Abstract
The invention discloses a gas valve conical surface sealing method with cold state angle difference. The gas valve conical surface sealing method with cold state angle difference adopts a gas valve seat and a gas valve which are matched mutually; the inner surface of the matched position of the gas valve seat and the gas valve is a conical surface; the outer surface of the matched position of the gas valve seat and the gas valve is a conical surface; the outer conical surface of the gas valve has a cone angle alpha; a deformation cone angle beta is reserved on the inner conical surface of the gas valve seat; in a cold state, alpha is greater than beta; moreover, in a hot state, alpha is equal to beta. Direct erosion and corrosion of gas for the conical surfaces of the gas valve and the valve seat when a diesel engine is broken out are prevented by the gas valve conical surface sealing method; meanwhile, accommodated carbon is also avoided being formed in a slit between the gas valve and the gas valve seat, so that failure of the conical surfaces of the gas valve and the gas valve seat can be effectively prevented and service lives of the gas valve and the valve seat are prolonged; when the gas valve conical surface sealing method is applied to a heavy oil engine or a gas machine, the gas valve has an outstanding sealing effect.
Description
Technical field
The present invention relates to a kind of air valve conical surface seal method with cold conditions differential seat angle, belong to air valve conical surface seal technical field.
Background technique
At present, most domestic diesel engine, when air valve assembles, only considers the sealing of air valve during cold conditions, but when diesel engine normally works, diesel engine cylinder temperature can reach 1800 DEG C, at these high temperatures, air valve valve disc can produce some distortion, if Fig. 1 is the schematic diagram of cold conditions air valve and valve seat assembling condition, as can be seen from Figure 1, due to when making assembling with air valve seat 1 of air valve 2, during in order to ensure cold conditions, air valve 2 good sealing effect, therefore air valve 2 does not have slit.But, when this air valve is in normal working, as shown in Figure 2, air valve 2 is out of shape under the working state of high temperature, and the air valve 2 after distortion forms slit 3 on the cooperation conical surface, and this slit will cause combustion gas directly to wash away air valve 2 and air valve seat 1 conical surface, particularly when fuel is heavy oil, combustion gas has comparatively severe corrosive, causes air valve and the valve seat conical surface by erosion, burn into and easily form carbon distribution in slit, causes air valve sealing to lose efficacy.
Summary of the invention
The object of the invention is to: a kind of air valve conical surface seal method with cold conditions differential seat angle is provided, solve existing air valve conical surface seal poor effect, especially when normal working, the conical surface of existing air valve forms slit, cause the technical problem that air valve sealing lost efficacy, thus can effectively solve above-mentioned problems of the prior art.
The object of the invention is realized by following technical proposals: a kind of air valve conical surface seal method with cold conditions differential seat angle, comprise the air valve seat and air valve that cooperatively interact, the internal surface of air valve seat and air valve cooperation place is the conical surface, the outer surface of air valve and air valve seat cooperation place is the conical surface, the male cone (strobilus masculinus) cone angle of air valve is α, the inner conical surface prearrangement of deformation amount cone angle beta of air valve seat, when cold conditions: α > β; Further, when hot: α=β.
As a kind of optimal way, be applied to the air valve seat on railway locomotive 240 serial diesel engine and air valve, the cold conditions differential seat angle when cold conditions is: alpha-beta=10 ' ~ 30 ', and when hot: α ≈ β.
As another kind of optimal way, be applied to the medium speed diesel valve sealing of 600kW ~ 9000kW, the cold conditions differential seat angle when cold conditions is: alpha-beta=12 ' ~ 25 ', and when hot: α ≈ β.
As another kind of optimal way, be applied to the elevated-temperature seal that diesel engine is operated in 1200 DEG C ~ 1800 DEG C, the cold conditions differential seat angle when cold conditions is: alpha-beta=10 ' ~ 25 ', and when hot: α ≈ β.
The principle that realizes of the present invention is:
The present invention when cold conditions cone match, is designed to the mode of the large end in contact of the conical surface, that is: air valve cone angle > valve seat distortion cone angle beta by air valve and valve seat consciously.When diesel engine normally runs, namely time hot, under air valve is subject to the acting in conjunction that high temperature, the effect of spring for valve power and the air valve conical surface constantly knock the air valve seat conical surface, the valve disc of air valve can deform, namely α angle reduces, but because when cold conditions, air-supply valve frustoconical bevel angle has reserved certain deformation angle, therefore the whole conical surface of diesel engine air valve and valve seat when normal working can just be fitted completely, forms effective conical surface seal.Time thus to prevent diesel engine from breaking out, combustion gas is to air valve, the direct erosion of the valve seat conical surface, corrosion, also avoids forming carbon distribution in the slit between air valve and valve seat simultaneously, improves the working life of air valve and valve seat.
Compared with prior art, beneficial effect of the present invention:
1, structure is simple, and easily realize, can on the basis of existing air valve, carry out little improvement and realize, improving cost be low;
2, can the inefficacy of effectively anti-air-stopping valve and the air valve seat conical surface, improve working life;
3, the accumulation of carbon distribution can effectively be reduced;
4, be applied on heavy oil engine or gas machine, air valve sealing is remarkably productive.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing air valve and valve seat cold conditions state;
Fig. 2 is the schematic diagram of existing air valve and valve seat assembling condition when working.
Air valve time Fig. 3 is cold conditions of the present invention and valve seat mated condition schematic diagram;
Fig. 4 is the air valve of the present invention when working and valve seat mated condition schematic diagram.
Wherein: the direction of arrow is the direction that combustion gas enters.
1-air valve seat, 2-air valve, 3-slit, α: air valve cone angle; β: valve seat cone angle.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
All features disclosed in this specification, or the step in disclosed all methods or process, except the speciality mutually repelled and/or step, all can combine by any way, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object, namely, unless specifically stated otherwise, an embodiment in a series of equivalence of each feature or similar characteristics.
As shown in Figure 3,4, a kind of air valve conical surface seal method with cold conditions differential seat angle, it comprises the air valve seat 1 and air valve 2 that cooperatively interact, air valve seat 1 is the conical surface with the internal surface of air valve 2 cooperation place, air valve 2 is the conical surface with the outer surface of air valve seat 1 cooperation place, it is characterized in that: the male cone (strobilus masculinus) cone angle of air valve is α, the inner conical surface prearrangement of deformation amount cone angle beta of air valve seat, when cold conditions: α > β; Further, when hot: α=β.
embodiment 1
Be applied to the air valve seat on railway locomotive 240 serial diesel engine and air valve, cold conditions differential seat angle when cold conditions is: alpha-beta=10 ' ~ 30 ', and when hot: α ≈ β, the error of the male cone (strobilus masculinus) cone angle of air valve now and the inner conical surface prearrangement of deformation amount cone angle beta of air valve seat is less, therefore, two angles are about equal, due to the continuous change of temperature, therefore, the male cone (strobilus masculinus) cone angle of air valve and the inner conical surface prearrangement of deformation amount cone angle beta of air valve seat can not reach absolute equal, Gu herein, the applicant adopts the saying approximated.
The present invention is by air valve and valve seat when cold conditions cone match, and be designed to the mode of the large end in contact of the conical surface consciously, that is: air valve cone angle > valve seat distortion cone angle beta, the cold conditions differential seat angle when cold conditions is 10 ' ~ 30 '.When diesel engine normally runs, namely time hot, air valve is subject to high temperature, under the acting in conjunction that the effect of spring for valve power and the air valve conical surface constantly knock the air valve seat conical surface, the valve disc of air valve can deform, namely α angle reduces, but because when cold conditions, air-supply valve frustoconical bevel angle has reserved certain deformation angle, therefore the whole conical surface of diesel engine air valve and valve seat when normal working can just be fitted completely, form effective conical surface seal, when preventing diesel engine from breaking out, combustion gas is to air valve, the direct erosion of the valve seat conical surface, corrosion, also avoid forming carbon distribution in the slit between air valve and valve seat simultaneously, improve the working life of air valve and valve seat.
embodiment 2:
Be applied to the medium speed diesel valve sealing of 600kW ~ 9000kW, the cold conditions differential seat angle when cold conditions is: alpha-beta=12 ' ~ 25 ', and when hot: α ≈ β.
embodiment 3:
Be applied to the elevated-temperature seal being operated in 1200 DEG C ~ 1800 DEG C, the cold conditions differential seat angle when cold conditions is: alpha-beta=10 ' ~ 25 ', and when hot: α ≈ β.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the air valve conical surface seal method with cold conditions differential seat angle, comprise the air valve seat (1) and air valve (2) that cooperatively interact, air valve seat (1) is the conical surface with the internal surface of air valve (2) cooperation place, air valve (2) is the conical surface with the outer surface of air valve seat (1) cooperation place, it is characterized in that: the male cone (strobilus masculinus) cone angle of air valve is α, the inner conical surface prearrangement of deformation amount cone angle beta of air valve seat, when cold conditions: α > β; Further, when hot: α=β.
2. the air valve conical surface seal method of band cold conditions differential seat angle as claimed in claim 1, it is characterized in that: be applied to the air valve seat on railway locomotive 240 serial diesel engine and air valve, the cold conditions differential seat angle when cold conditions is: alpha-beta=10 ' ~ 30 '.
3. the air valve conical surface seal method of band cold conditions differential seat angle as claimed in claim 1, it is characterized in that: the medium speed diesel valve sealing being applied to 600kW ~ 9000kW, the cold conditions differential seat angle when cold conditions is: alpha-beta=12 ' ~ 25 '.
4. the air valve conical surface seal method of band cold conditions differential seat angle as claimed in claim 1, is characterized in that: be applied to the elevated-temperature seal that diesel engine is operated in 1200 DEG C ~ 1800 DEG C, the cold conditions differential seat angle when cold conditions is: alpha-beta=10 ' ~ 25 '.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549421.XA CN104329500A (en) | 2014-10-17 | 2014-10-17 | Gas valve conical surface sealing method with cold state angle difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549421.XA CN104329500A (en) | 2014-10-17 | 2014-10-17 | Gas valve conical surface sealing method with cold state angle difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104329500A true CN104329500A (en) | 2015-02-04 |
Family
ID=52404273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410549421.XA Pending CN104329500A (en) | 2014-10-17 | 2014-10-17 | Gas valve conical surface sealing method with cold state angle difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104329500A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343699A (en) * | 1989-06-12 | 1994-09-06 | Mcalister Roy E | Method and apparatus for improved operation of internal combustion engines |
| CN2380764Y (en) * | 1999-06-18 | 2000-05-31 | 王怀林 | Sealing device of fluid non-return valve |
| CN101243305A (en) * | 2005-01-28 | 2008-08-13 | 蒂森克虏伯克劳泽有限公司 | Method for determining at least the position of a movable part of a drive unit such as an internal combustion engine or the similar |
| CN202483662U (en) * | 2011-12-31 | 2012-10-10 | 大连迪施船机有限公司 | Large diameter transition streamline-shaped exhaust valve stem applied to marine diesel engine |
| CN202483664U (en) * | 2011-12-31 | 2012-10-10 | 大连迪施船机有限公司 | Marine diesel engine vent valve seat with air buffer groove |
| CN203879567U (en) * | 2014-02-26 | 2014-10-15 | 南车玉柴四川发动机股份有限公司 | Structure with underlying air valve rotary mechanism for 240 diesel engine |
-
2014
- 2014-10-17 CN CN201410549421.XA patent/CN104329500A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343699A (en) * | 1989-06-12 | 1994-09-06 | Mcalister Roy E | Method and apparatus for improved operation of internal combustion engines |
| CN2380764Y (en) * | 1999-06-18 | 2000-05-31 | 王怀林 | Sealing device of fluid non-return valve |
| CN101243305A (en) * | 2005-01-28 | 2008-08-13 | 蒂森克虏伯克劳泽有限公司 | Method for determining at least the position of a movable part of a drive unit such as an internal combustion engine or the similar |
| CN202483662U (en) * | 2011-12-31 | 2012-10-10 | 大连迪施船机有限公司 | Large diameter transition streamline-shaped exhaust valve stem applied to marine diesel engine |
| CN202483664U (en) * | 2011-12-31 | 2012-10-10 | 大连迪施船机有限公司 | Marine diesel engine vent valve seat with air buffer groove |
| CN203879567U (en) * | 2014-02-26 | 2014-10-15 | 南车玉柴四川发动机股份有限公司 | Structure with underlying air valve rotary mechanism for 240 diesel engine |
Non-Patent Citations (1)
| Title |
|---|
| 华小峰: "发动机气门干涉角在气门维修中的应用", 《矿业快报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205001559U (en) | Novel detachable top mounted ball valve seating structure | |
| CN104329500A (en) | Gas valve conical surface sealing method with cold state angle difference | |
| CN204239852U (en) | A kind of air valve conical surface seal device with cold conditions differential seat angle | |
| CN204899986U (en) | Can reduce turbo charger turbine end structure of gas leakage | |
| CN104500559A (en) | Thrust bearing shell | |
| CN104791103A (en) | Sealing structure for static-static chambers of gas turbine | |
| CN202493299U (en) | Gas leak-proof heat-insulation structure at turbine terminal of miniature turbocharger | |
| CN211550816U (en) | Annular multi-group sealing structure | |
| CN203114607U (en) | High-temperature and fluid end pump head structure | |
| CN204627679U (en) | A kind of turbine cylinder horizontal flange sealing configuration | |
| WO2016050164A1 (en) | Piston ring with variable radial thickness | |
| CN202215310U (en) | Volute assembling type embedded sleeve | |
| CN102588139A (en) | Fully closed piston or gas tightness piston ring component | |
| CN202468050U (en) | Totally-closed piston/airtightness piston ring component | |
| CN202202977U (en) | Piston ring of gasoline engine | |
| CN202252620U (en) | Jacket pipe for automobile part | |
| CN202673471U (en) | Novel cylinder cover water outlet pipe | |
| CN205025520U (en) | Take engine valve that second grade is sealed | |
| CN204921052U (en) | Use sealing component between turbo charger turbine case and bearing body | |
| CN206957799U (en) | One kind segmentation exhaust pipe connection structure | |
| CN206917754U (en) | A kind of car combustion engine piston ring | |
| CN107559099A (en) | A kind of car combustion engine piston ring | |
| CN203374825U (en) | Butterfly valve floating valve seat | |
| CN201835919U (en) | Automobile component-used protecting pipe | |
| CN206608237U (en) | Vacuum line with easy assembly and disassembly type protective case |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150204 |
|
| RJ01 | Rejection of invention patent application after publication |