CN105003311A - Engine valve with different neck structures - Google Patents
Engine valve with different neck structures Download PDFInfo
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- CN105003311A CN105003311A CN201510504870.7A CN201510504870A CN105003311A CN 105003311 A CN105003311 A CN 105003311A CN 201510504870 A CN201510504870 A CN 201510504870A CN 105003311 A CN105003311 A CN 105003311A
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- valve
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- neck
- cervix
- air valve
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Abstract
An engine valve with different neck structures comprises a valve rod, a valve neck and a valve disc, wherein the valve rod, the valve neck and the valve disc are integrally formed trough forging; the valve neck is horn-shaped, the camber surface height is L, the small end of the valve neck is connected with the valve rod, and the large end is connected with the valve disc; the camber surface height L of the valve neck is divided into an L1 section and an L2 section, the diameter of the large end of the L1 section is D2, the diameter of the small end of the L1 section is D1, and D2 and D1 are in a ratio of (1.3-1.8): 1, the blank forming surface of the L1 section of the valve neck is subjected to cutting machining, and the blank forming surface of the L2 section of the valve neck keeps unchanged. According to analysis for broken valve necks, all broken parts of the valve necks are concentrated at the L1 sections of the valve necks, the ratio of the cross section diameter of the L1 section of each valve neck to D1 is smaller than 1.3, the ratio of the cross section diameter of the L2 section of each valve neck to D1 is larger than 1.3, and accordingly, neck breakage hardly happens. Therefore, all that is needed is to perform cutting machining on the L1 section, and neck breakage of the valve can be avoided.
Description
Technical field
The present invention relates to technical field of engines, particularly engine valve structure.
Background technique
Existing engine valve as shown in Figure 1, engine valve comprises valve stem 1, air valve cervix 2 and Valve Disc 3, valve stem 1, air valve cervix 2 and Valve Disc 3 is one-body molded by forging, air valve cervix 2 is in horn-like, cambered surface height is L, the small end of air valve cervix 2 is connected with valve stem 1, and large end is connected with Valve Disc 3.During engine valve work, the heat that Valve Disc 3 produces is the highest, and heat is delivered to air valve cervix 2 from Valve Disc 3, and be then delivered to valve stem 1, heat progressively reduces in transmittance process.
According to the difference of air valve cervix 2 surface manufacturing condition, the structure of existing air valve cervix 2 has two kinds, and these two kinds of structures are designing requirement according to motor and select different air valve cervix structures.
A kind of structure carries out cutting to the blank forming surface of air valve cervix 2, the valve of this structure is applicable to medium and heavy engine valve and marine engine valve, the object of carrying out cutting to the blank forming surface of air valve cervix 2 carries out machining outside the forging defect produced valve and the nitrogen-pearlite inevitably produced due to heat treatment, to ensure to obtain Security large as far as possible, anti-air-stop gate ruptures at neck.There are the following problems to carry out cutting to the blank forming surface of air valve cervix 2: one is that valve utilization rate of raw materials is lower than not carrying out cutting structural type; Two is that processing cost is relatively high.
Another kind of structure does not carry out cutting to the blank forming surface of air valve cervix 2, the valve of this structure is applicable to petrol engine valve and high performance-price ratio valve, because the blank forming surface of air valve cervix 2 does not carry out cutting after valve blank is shaping, valve work flow can be shortened, save valve raw material, therefore this structure valve cost of production is relatively low simultaneously.Not carrying out cutting Problems existing to the blank forming surface of air valve cervix 2 is: the blank forming surface of air valve cervix 2 functional reliability comparison air valve cervix 2 carries out the low of cutting, and air valve cervix 2 Fracture Failure Risk is corresponding larger.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art and a kind of engine valve of different neck structure is provided.
Technological scheme of the present invention is: a kind of engine valve of different neck structure, comprise valve stem, air valve cervix and Valve Disc, valve stem, air valve cervix and Valve Disc are one-body molded by forging, air valve cervix is horn-like, cambered surface height is L, the small end of air valve cervix is connected with valve stem, and large end is connected with Valve Disc.The cambered surface height L of air valve cervix is divided into L1 section and L2 section, the ratio of L1 section Outside diameter to be D2, L1 section end diameter be D1, D2 and D1 is 1.3 ~ 1.8:1, carry out cutting to the L1 section blank forming surface of air valve cervix, the L2 section blank forming surface of air valve cervix maintains the original state.
According to the air valve cervix analysis to fracture, the fracture location of air valve cervix all concentrates on the L1 section of air valve cervix, the cross-sectional diameter of this section of air valve cervix and the ratio of D1 are all less than 1.3, and the ratio of the L2 section cross-sectional diameter of air valve cervix and D1 is all greater than 1.3, and neck fracture occurs hardly.Therefore, only need carry out cutting to L1 section, just can rupture at neck by anti-air-stop gate.
The present invention compared with prior art has following features:
1, the present invention has taken into account the major advantage of existing two kinds of neck structure patterns, and to easily occurring that the L1 section of fracture failure carries out cutting, can obtain Security large as far as possible, anti-air-stop gate ruptures at neck.
2, cutting is not carried out to the L2 section near valve-face, valve utilization rate of raw materials can be improved, obtain high reliability simultaneously.
Below in conjunction with the drawings and specific embodiments, detailed construction of the present invention is further described.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention.
Embodiment
The engine valve of embodiment one, a kind of different neck structure, comprise valve stem 1, air valve cervix 2 and Valve Disc 3, valve stem 1, air valve cervix 2 and Valve Disc 3 is one-body molded by forging, air valve cervix 2 is in horn-like, cambered surface height is L, the small end of air valve cervix 2 is connected with valve stem 1, and large end is connected with Valve Disc 3.The cambered surface height L of air valve cervix 2 is divided into L1 section and L2 section, the ratio of L1 section Outside diameter to be D2, L1 section end diameter be D1, D2 and D1 is 1.3:1, carry out cutting to the L1 section blank forming surface of air valve cervix 2, the L2 section blank forming surface of air valve cervix 2 maintains the original state.
The engine valve of embodiment two, a kind of different neck structure, comprise valve stem 1, air valve cervix 2 and Valve Disc 3, valve stem 1, air valve cervix 2 and Valve Disc 3 is one-body molded by forging, air valve cervix 2 is in horn-like, cambered surface height is L, the small end of air valve cervix 2 is connected with valve stem 1, and large end is connected with Valve Disc 3.The cambered surface height L of air valve cervix 2 is divided into L1 section and L2 section, the ratio of L1 section Outside diameter to be D2, L1 section end diameter be D1, D2 and D1 is 1.5:1, carry out cutting to the L1 section blank forming surface of air valve cervix 2, the L2 section blank forming surface of air valve cervix 2 maintains the original state.
The engine valve of embodiment three, a kind of different neck structure, comprise valve stem 1, air valve cervix 2 and Valve Disc 3, valve stem 1, air valve cervix 2 and Valve Disc 3 is one-body molded by forging, air valve cervix 2 is in horn-like, cambered surface height is L, the small end of air valve cervix 2 is connected with valve stem 1, and large end is connected with Valve Disc 3.The cambered surface height L of air valve cervix 2 is divided into L1 section and L2 section, the ratio of L1 section Outside diameter to be D2, L1 section end diameter be D1, D2 and D1 is 1.8:1, carry out cutting to the L1 section blank forming surface of air valve cervix 2, the L2 section blank forming surface of air valve cervix 2 maintains the original state.
Claims (1)
1. the engine valve of a different neck structure, comprise valve stem, air valve cervix and Valve Disc, valve stem, it is one-body molded that air valve cervix and Valve Disc pass through forging, air valve cervix is horn-like, cambered surface height is L, the small end of air valve cervix is connected with valve stem, large end is connected with Valve Disc, it is characterized in that: the cambered surface height L of air valve cervix is divided into L1 section and L2 section, L1 section Outside diameter is D2, L1 section end diameter is D1, the ratio of D2 and D1 is 1.3 ~ 1.8:1, cutting is carried out to the L1 section blank forming surface of air valve cervix, the L2 section blank forming surface of air valve cervix maintains the original state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510504870.7A CN105003311B (en) | 2015-08-18 | 2015-08-18 | The engine valve of different neck structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510504870.7A CN105003311B (en) | 2015-08-18 | 2015-08-18 | The engine valve of different neck structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105003311A true CN105003311A (en) | 2015-10-28 |
| CN105003311B CN105003311B (en) | 2018-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510504870.7A Active CN105003311B (en) | 2015-08-18 | 2015-08-18 | The engine valve of different neck structures |
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| Country | Link |
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| CN (1) | CN105003311B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678827A (en) * | 2018-05-11 | 2018-10-19 | 浙江吉利控股集团有限公司 | Air inlet door and valve actuating mechanism |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11309540A (en) * | 1998-04-23 | 1999-11-09 | Fuji Oozx Inc | Forming method of engine valve |
| EP0971097A1 (en) * | 1998-07-08 | 2000-01-12 | Wärtsilä NSD Schweiz AG | Valve for an internal combustion engine |
| CN101749066A (en) * | 2009-12-30 | 2010-06-23 | 马勒三环气门驱动(湖北)有限公司 | Gas inlet valve and gas outlet valve of engine and process for manufacturing same |
| CN201896641U (en) * | 2010-11-09 | 2011-07-13 | 湖南天雁机械有限责任公司 | High-power engine valve |
| CN103422930A (en) * | 2012-05-23 | 2013-12-04 | 爱三工业株式会社 | Intake engine valves |
| CN205025521U (en) * | 2015-08-18 | 2016-02-10 | 湖南天雁机械有限责任公司 | Engine valve of different neck structures |
-
2015
- 2015-08-18 CN CN201510504870.7A patent/CN105003311B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11309540A (en) * | 1998-04-23 | 1999-11-09 | Fuji Oozx Inc | Forming method of engine valve |
| EP0971097A1 (en) * | 1998-07-08 | 2000-01-12 | Wärtsilä NSD Schweiz AG | Valve for an internal combustion engine |
| CN101749066A (en) * | 2009-12-30 | 2010-06-23 | 马勒三环气门驱动(湖北)有限公司 | Gas inlet valve and gas outlet valve of engine and process for manufacturing same |
| CN201896641U (en) * | 2010-11-09 | 2011-07-13 | 湖南天雁机械有限责任公司 | High-power engine valve |
| CN103422930A (en) * | 2012-05-23 | 2013-12-04 | 爱三工业株式会社 | Intake engine valves |
| CN205025521U (en) * | 2015-08-18 | 2016-02-10 | 湖南天雁机械有限责任公司 | Engine valve of different neck structures |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678827A (en) * | 2018-05-11 | 2018-10-19 | 浙江吉利控股集团有限公司 | Air inlet door and valve actuating mechanism |
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|---|---|
| CN105003311B (en) | 2018-02-02 |
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