CN207332971U - A kind of modified form nitrogenizes valve - Google Patents
A kind of modified form nitrogenizes valve Download PDFInfo
- Publication number
- CN207332971U CN207332971U CN201721040365.2U CN201721040365U CN207332971U CN 207332971 U CN207332971 U CN 207332971U CN 201721040365 U CN201721040365 U CN 201721040365U CN 207332971 U CN207332971 U CN 207332971U
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- Prior art keywords
- valve stem
- engine valve
- groove location
- locker groove
- nitration case
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Abstract
The utility model discloses a kind of modified form to nitrogenize valve, including head portion that, conical surface transition section and engine valve stem, the outer circumferential surface at the close front end position of the engine valve stem is provided with locker groove location, quarter butt section is formed between the locker groove location and the front end of the engine valve stem, the head portion that, conical surface transition section and the engine valve stem are both provided with nitration case from locker groove location to the position between conical surface transition section, and the end of the locker groove location, the quarter butt section and the engine valve stem is not provided with nitration case.The beneficial effects of the utility model are：Nitration case can improve engine valve stem, the wearability of conical surface transition section and head portion that, corrosion resistance, and locker groove location and quarter butt section are processed after valve nitrogen treatment, nitration case is not provided with, can be avoided the problem that " nitration case slackens locker groove location fatigue strength " and " nitridation reduces the problem of rod end quenching hardness ".
Description
Technical field
Valve field is the utility model is related to, more particularly to a kind of modified form nitridation valve.
Background technology
Valve liter per minute falls thousands of times in engine work, to reduce engine valve stem abrasion, general valve stem and conduit
Between have the friction coefficient of minimum, while engine valve stem is surface-treated, to improve its wear-resisting property, both at home and abroad frequently with
Method be chromium plating and nitridation.
Chromium plating is to improve the conventional method of engine valve stem wear-resisting property, and nitridation is the conduct in the case of stringent Abgasgesetz
The alternative solution of chromium plating.Nitridation is that valve is overall for a long time in more than 500 degrees Celsius of nitriding mediums, as shown in Figure 1, gas
The whole piece surface of door 1 has nitration case 2.The nitridation of domestic valve frequently with bath nitriding mode (i.e. salt-bath nitriding), be
Nitrogen treatment is carried out after the completion of valve finishing.3 nitration case of engine valve stem can meet valve stem as conventional stem chromium plating
Wearability requirement；Valve-face, rod end surface nitration case can improve its wearability；Valve end face, that neck nitration case can improve its is resistance to
Corrosive nature.But it must also be noted that influence of the nitration case to locker groove location 4, it will slacken the fatigue strength at the position, while by
It is by valve in more than 500 degrees Celsius of environment in nitridation, can suitably reduces rod end quenching hardness.
Utility model content
The purpose of this utility model is that above-mentioned deficiency and defect for the prior art, there is provided a kind of modified form nitrogenizes gas
Door, to solve the above problems.
The technical problem that the utility model is solved can be realized using following technical scheme：
A kind of modified form nitridation valve, including head portion that, conical surface transition section and engine valve stem, the engine valve stem are close
The outer circumferential surface at front end position be provided with locker groove location, formed between the locker groove location and the front end of the engine valve stem
Quarter butt section, it is characterised in that the head portion that, conical surface transition section and the engine valve stem are from locker groove location to conical surface transition
Position between section is both provided with nitration case, and the end of the locker groove location, the quarter butt section and the engine valve stem is equal
It is not provided with nitration case.
As a result of technical solution as above, the beneficial effects of the utility model are：Nitration case can improve valve stem
Portion, the wearability of conical surface transition section and head portion that, corrosion resistance, and locker groove location and quarter butt section are nitrogenized in valve
It is processed after processing, is not provided with nitration case, can be avoided the problem that " nitration case slackens locker groove location fatigue strength "
And " nitridation reduces the problem of rod end quenching hardness ".
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram of embodiment of the prior art.
Fig. 2 is a kind of structure diagram of embodiment of the utility model.
Embodiment
In order to make the technical means, creative features, achievable purpose and effectiveness that the utility model is realized easy to understand, under
The utility model is expanded on further in face.
A kind of modified form nitridation valve shown in Figure 2, including head portion that 10, conical surface transition section 20 and engine valve stem
30, the outer circumferential surface at the close front end position of engine valve stem 30 is provided with locker groove location 40, locker groove location 40 and engine valve stem
Quarter butt section 50 is formed between 30 front end 31.Head portion that 10, conical surface transition section 20 and engine valve stem from locker groove location 40 to
Position 30a between conical surface transition section 20 is both provided with nitration case 60, locker groove location 40, quarter butt section 50 and engine valve stem 30
End 31 be not provided with nitration case.
The utility model can be used for common overall austenitic steel nitridation valve, common overall martensite steel nitridation valve and
Common friction welding structure nitridation valve.Nitration case 60 can improve engine valve stem 30, conical surface transition section 20 and head portion that 10
Wearability, corrosion resistance, and locker groove location 40 and quarter butt section 50 are processed after valve nitrogen treatment, are not set
Nitration case is put, " nitration case slackens locker groove location fatigue strength " can be avoided the problem that and " it is hard that nitridation reduces rod end quenching
The problem of spending ".
The advantages of basic principle and main feature and the utility model of the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Simply illustrate the utility model principle, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
Various changes and modifications are had, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed scope is defined by the appending claims and its equivalent thereof.
Claims (1)
1. a kind of modified form nitridation valve, including head portion that, conical surface transition section and engine valve stem, the engine valve stem are close
The outer circumferential surface at front end position is provided with locker groove location, is formed between the locker groove location and the front end of the engine valve stem short
Bar segment, it is characterised in that the head portion that, conical surface transition section and the engine valve stem are from locker groove location to conical surface transition section
Between position be both provided with nitration case, the end of the locker groove location, the quarter butt section and the engine valve stem does not have
There is setting nitration case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721040365.2U CN207332971U (en) | 2017-08-18 | 2017-08-18 | A kind of modified form nitrogenizes valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721040365.2U CN207332971U (en) | 2017-08-18 | 2017-08-18 | A kind of modified form nitrogenizes valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207332971U true CN207332971U (en) | 2018-05-08 |
Family
ID=62373781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721040365.2U Active CN207332971U (en) | 2017-08-18 | 2017-08-18 | A kind of modified form nitrogenizes valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207332971U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980775A (en) * | 2019-05-23 | 2020-11-24 | 马勒国际有限公司 | Gas exchange valve |
-
2017
- 2017-08-18 CN CN201721040365.2U patent/CN207332971U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980775A (en) * | 2019-05-23 | 2020-11-24 | 马勒国际有限公司 | Gas exchange valve |
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