CN202300697U - Sheet molding compound (SMC) air cylinder head cover for diesel engine - Google Patents
Sheet molding compound (SMC) air cylinder head cover for diesel engine Download PDFInfo
- Publication number
- CN202300697U CN202300697U CN2011203752505U CN201120375250U CN202300697U CN 202300697 U CN202300697 U CN 202300697U CN 2011203752505 U CN2011203752505 U CN 2011203752505U CN 201120375250 U CN201120375250 U CN 201120375250U CN 202300697 U CN202300697 U CN 202300697U
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- Prior art keywords
- valve mechanism
- mechanism cover
- cylinder head
- air cylinder
- head cover
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- Expired - Fee Related
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a Sheet molding compound (SMC) air cylinder head cover for a diesel engine. The bottom edge of the air cylinder head cover is provided with a flange; more than 20 outer reinforcing ribs are arranged between the flange and the outer wall of the air cylinder head cover; the main body of the air cylinder head cover is provided with three mutually parallel inner reinforcing ribs; and the inner reinforcing ribs extend from one side of the air cylinder head cover to the other side of the air cylinder head cover. According to a noise reduction method and the air cylinder head cover of the utility model, the noise can be reduced by about 1 decibel, SMC is used as the material of the air cylinder head cover, the machining process is simple, the material cost is low, and the comprehensive cost of products is greatly reduced.
Description
Technical field
The utility model relates to the engine mechanical technical field, relates to a kind of diesel engine SMC valve mechanism cover in particular.
Background technique
Existing diesel engine oil valve mechanism cover; Because of height such as pressurized machine and valve mechanism cover are arranged; And outlet pipe and cylinder head distance is near, thus the operating temperature of valve mechanism cover up to 150 ℃～200 ℃, so the valve mechanism cover material choose normally steel plate, aluminum alloy or Clad Steel Plate.Engineering plastics do not satisfy high temperature requirement because of heat resistance, and application is restricted.When selection is steel plate, generally be to select mild-steel sheet, adopt the impact briquetting of individual layer steel plate; And its surface carried out anti-corrosion treatment, cost is lower, but punching press is prone to buckling deformation; Planeness is poor, and the fault of leakage of oil is many, and noise reduction is the poorest; Do not satisfy the noise reduction requirement of the above type of state's three dischargings, generally be applied to the less demanding type of noise reduction.When selection is aluminum alloy, generally be to select ZL104, ZL106, ZL108, ZL401, ADC12 etc. for use, adopt sand casting process or extrusion process moulding; Form through machining, noise reduction is better again, is widely used at present; But selection aluminum alloy; Its technical disadvantages is: (1) blank adopts the casting technique moulding, particularly adopts traditional sand casting process, and pollution is big, energy consumption is high, efficient is low, reject rate is high; (2) blank also needs machining, and overall cost is higher; (4) cost, the noise reduction incompatibility public's demand day by day.When selection is Clad Steel Plate,, adopt impact briquetting because of Clad Steel Plate is the damping rubber that folder one deck has decrease of noise functions between the two layers of thin steel plate; Surface anticorrosive is handled; So noise reduction is best, but because of cost Tai Gao domestic manufacturers, user temporarily are difficult to accept, so use few.
Cost, the noise reduction of this different materials compared can know that cost is from high to low: Clad Steel Plate＞aluminum alloy＞engineering plastics＞steel plate, noise reduction (or damping constant) from high to low: Clad Steel Plate＞engineering plastics＞aluminum alloy＞steel plate.Along with the development of technology, the requirement of engine noise, cost valve mechanism cover more and more stricter, low-cost, excellent noise reduction effect is become the focus of new material, new technology development.
The model utility content
The utility model provides a kind of diesel engine to fall the SMC valve mechanism cover, can noise reduction about 1 decibel, and not only processing technology is simple, and the cost of material is low, greatly reduces the overall cost of product.
The utility model is to adopt following technological scheme to realize above-mentioned purpose: a kind of diesel engine SMC valve mechanism cover; It is characterized in that; Root edge in this valve mechanism cover is provided with flange; Be provided with the outer stiffening rib more than 20 between the outer wall of this flange and valve mechanism cover, on the main body of this valve mechanism cover, be provided with three interior stiffening ribs that are parallel to each other, stiffening rib extends to opposite side by a side of valve mechanism cover in this.
As further specifying of such scheme:
Preferably, main performance index such as the following table of said SMC (sheet molding compound): fibre content 35 ± 3%, density 1.8 ± 0.05g/cm
3, tensile strength>=90MPa, stretch modulus>=11GPa, flexural strength>=200MPa, flexural modulus>=11GPa, heat distortion temperature>=230 ℃, damping constant>=0.05; Under 175 ℃ of conditions, carry out air oven aging test, require tensile strength>=90MPa behind the 1008h, stretch modulus>=10GPa, flexural strength>=200MPa, flexural modulus>=10GPa; Under 150 ℃ of conditions, carry out the test of the machine oil of anti-CF-4 property, require tensile strength>=90MPa behind the 1008h, stretch modulus>=10GPa, flexural strength>=200MPa, flexural modulus>=10GPa.
Preferably, said valve mechanism cover is provided with the breathing pipe jack, is provided with self-locking device in this breathing pipe jack, and this self-locking device is the circular groove that cooperates with the breathing pipe end, and this ring slot outside is provided with wedge-shaped bead.
Preferably, said outer stiffening rib is provided with 28.
The beneficial effect that the utility model adopts above technological scheme to reach is:
1. the described valve mechanism cover of the utility model, because of adopting the SMC material, density is 1.8g/cm
3About, and aluminum alloy density is 2.7g/cm
3About, all on year-on-year basis aluminum alloy material loss of weight amplitude reach 30%, and can adopt hot pressing single forming technology, technology is simple, product overall cost aluminum alloy on year-on-year basis descends 25～35%, remarkable in economical benefits.
2. the described valve mechanism cover of the utility model, good heat resistance, dimensionally stable are good, and heat distortion temperature is up to 230 ℃, and the long-term work temperature reaches 175 ℃, and dimensional stability is good, and using process is not easy distortion, reaches 10 years working life.
Description of drawings
Fig. 1 is the structural representation of the described valve mechanism cover of the utility model;
Fig. 2 is the vertical profile schematic representation of the said valve mechanism cover of the utility model;
Fig. 3 is the cross-sectional schematic representation of the said valve mechanism cover of the utility model.
Description of reference numerals:
Stiffening rib in the 1-, the outer stiffening rib of 2-, 3-breathing pipe jack, 4-breathing pipe, 5-circular groove.
Embodiment
For further setting forth the 26S Proteasome Structure and Function of the utility model, below in conjunction with accompanying drawing and preferred embodiment the utility model is elaborated, but the protection domain that is to be understood that the utility model does not receive the restriction of embodiment.
Fig. 1 is the structural representation of the described SMC valve mechanism cover of the utility model; Fig. 2 and Fig. 3 are respectively the vertical profile schematic representation and the cross-sectional schematic representation of this valve mechanism cover; Shown in figure, the material of this SMC valve mechanism cover is SMC (sheet molding compound), is provided with flange at the root edge of this valve mechanism cover; Be provided with 28 outer stiffening rib 2 between the outer wall of this flange and valve mechanism cover; On the main body of this valve mechanism cover, be provided with three interior stiffening ribs 1 that are parallel to each other, stiffening rib 1 extends to the opposite side transverse distribution on this valve mechanism cover by a side of valve mechanism cover in this, and width and thickness size are all bigger; Strengthening the rigidity of this valve mechanism cover, and then improve the natural frequency of this valve mechanism cover.On valve mechanism cover, be provided with breathing pipe jack 3; Be provided with self-locking device in this breathing pipe jack 3; This self-locking device is the circular groove 5 that cooperates with breathing pipe 4 ends, and these circular groove 5 outsides are provided with wedge-shaped bead, and breathing pipe 4 ends are provided with cone structure; Behind the breathing pipe jack 3 that breathing pipe 4 injects on the cylinder head, this cone structure sticks into the purpose that circular groove 5 reaches self-locking.The SMC material of the said valve mechanism cover of the utility model must reach the described performance of table one.
Aspect the Diesel Engine Complete Machine topology layout, take underlying pressurized machine and outlet pipe to make its measure, with below the operating temperature to 150 that reduces valve mechanism cover ℃ away from valve mechanism cover.Adopt the diesel engine of the said valve mechanism cover of the utility model, the diesel engine of existing on year-on-year basis installation aluminium alloy cylinder housing, about 1 decibel of noise reduction is equivalent to acoustic energy and has descended 30%, and it is nearly 1/3rd that noise level has reduced, and noise reduction is very obvious.
Table one SMC engineering plastics main performance index
Be merely one of the utility model preferred embodiment shown in the utility model the foregoing description and the accompanying drawing; Can not limit to the utility model with this; Under the condition that does not break away from the utility model marrow, any change that those skilled in the art did all belongs to the protection domain of the utility model.
Claims (3)
1. diesel engine SMC valve mechanism cover; It is characterized in that; Root edge in this valve mechanism cover is provided with flange; Be provided with the outer stiffening rib more than 20 between the outer wall of this flange and valve mechanism cover, on the main body of this valve mechanism cover, be provided with three interior stiffening ribs that are parallel to each other, stiffening rib extends to opposite side by a side of valve mechanism cover in this.
2. diesel engine SMC valve mechanism cover according to claim 1; It is characterized in that said valve mechanism cover is provided with the breathing pipe jack, be provided with self-locking device in this breathing pipe jack; This self-locking device is the circular groove that cooperates with the breathing pipe end, and this ring slot outside is provided with wedge-shaped bead.
3. diesel engine SMC valve mechanism cover according to claim 1 and 2 is characterized in that said outer stiffening rib is provided with 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203752505U CN202300697U (en) | 2011-09-30 | 2011-09-30 | Sheet molding compound (SMC) air cylinder head cover for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203752505U CN202300697U (en) | 2011-09-30 | 2011-09-30 | Sheet molding compound (SMC) air cylinder head cover for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300697U true CN202300697U (en) | 2012-07-04 |
Family
ID=46369614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203752505U Expired - Fee Related CN202300697U (en) | 2011-09-30 | 2011-09-30 | Sheet molding compound (SMC) air cylinder head cover for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300697U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032168A (en) * | 2011-09-30 | 2013-04-10 | 广西玉柴机器股份有限公司 | Diesel engine noise reduction method and sheet molding compound (SMC) cylinder head cover |
| CN110374757A (en) * | 2019-07-20 | 2019-10-25 | 徐海燕 | A kind of connection structure of valve mechanism cover and breather adapter |
-
2011
- 2011-09-30 CN CN2011203752505U patent/CN202300697U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032168A (en) * | 2011-09-30 | 2013-04-10 | 广西玉柴机器股份有限公司 | Diesel engine noise reduction method and sheet molding compound (SMC) cylinder head cover |
| CN110374757A (en) * | 2019-07-20 | 2019-10-25 | 徐海燕 | A kind of connection structure of valve mechanism cover and breather adapter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20160930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |