CN212535802U - Valve retainer reaches gasoline engine including it - Google Patents
Valve retainer reaches gasoline engine including it Download PDFInfo
- Publication number
- CN212535802U CN212535802U CN202021356010.6U CN202021356010U CN212535802U CN 212535802 U CN212535802 U CN 212535802U CN 202021356010 U CN202021356010 U CN 202021356010U CN 212535802 U CN212535802 U CN 212535802U
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- China
- Prior art keywords
- wall
- valve seat
- seat insert
- seat ring
- air outlet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
A valve seat ring and a gasoline engine comprising the same are provided, wherein the valve seat ring comprises an inner wall; the inner wall comprises an air passage opening part, a sealing band part and an air outlet guide part in sequence; the wall surfaces of the air passage opening part, the sealing strip part and the air outlet guide part are respectively conical surfaces with gradually increased inner diameters along the airflow direction. The valve seat ring provided by the utility model not only effectively increases the area of the air outlet of the air inlet channel, but also increases the flow coefficient to the maximum extent under the condition of ensuring the tumble ratio of the air inlet channel; meanwhile, the valve seat ring adopts a section with an irregular shape, so that the stability of the valve seat ring in the working process is ensured.
Description
Technical Field
The utility model relates to the technical field of engines, especially, relate to a valve seat insert reaches gasoline engine including it.
Background
The valve seat ring is the part of the cylinder cover which is attached to the valve conical surface, and the part bears the high-temperature action in the cylinder and simultaneously bears the valve impact load with extremely high frequency, so the valve seat ring is extremely easy to wear. The aluminum cylinder cover and most cast iron cylinder covers adopt valve seat rings which are provided with alloy cast iron or made of materials such as powder metallurgy and the like, so that the service life of the cylinder cover is prolonged. The valve seat ring is located at the last position where the air passage enters the cylinder, and has great influence on the flow coefficient of the air passage and the tumble ratio formed in the cylinder, so the structure and the size of the valve seat ring are very important.
With the increase of the compression ratio of the gasoline engine, the tumble ratio of the air passage is required to be higher and higher. In a traditional straight seat ring, as shown in fig. 1, a generatrix of a part of a cylinder of a valve seat ring connected with the inner wall of an air passage is perpendicular to the end surface of the seat ring. The straight-mouth seat ring has the disadvantages that the straight-mouth structure can cause airflow to directly enter the cylinder, the flow coefficient is increased, and the tumble ratio is reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a valve seat insert and a gasoline engine including the same, so as to at least partially solve at least one of the above-mentioned technical problems.
In order to achieve the above purpose, the technical scheme of the utility model is that:
as one aspect of the present invention, there is provided a valve seat insert comprising an inner wall;
the inner wall comprises an air passage opening part, a sealing band part and an air outlet guide part in sequence; the wall surfaces of the air passage opening part, the sealing strip part and the air outlet guide part are respectively conical surfaces with gradually increased inner diameters along the airflow direction.
As another aspect of the utility model, still provide a gasoline engine, include the valve seat circle as above-mentioned.
Based on above-mentioned technical scheme, the utility model discloses compare in prior art and have one of them or one of them part of following beneficial effect at least:
(1) the area of an air outlet of the air inlet is effectively increased, and the flow coefficient is increased to the maximum extent under the condition of ensuring the tumble ratio of the air inlet;
(2) the valve seat ring adopts a special-shaped section, so that the stability of the valve seat ring in the working process is ensured.
Drawings
FIG. 1 is a cross-sectional schematic view of a prior art valve seat insert with a straight port configuration;
fig. 2 is a schematic view of a valve seat ring installation state of embodiment 1 of the present invention;
FIG. 3 is an enlarged schematic view of portion A of FIG. 2;
FIG. 4 is an enlarged schematic view of angle α of FIG. 2;
fig. 5 is a schematic structural view when the valve seat ring alpha is 0 degrees;
fig. 6 is a schematic axial cross-sectional dimension view of a valve seat ring according to embodiment 1 of the present invention;
fig. 7 is a schematic view of a valve seat ring according to embodiment 2 of the present invention;
fig. 8 is a partial structural schematic view of a valve seat ring according to embodiment 2 of the present invention.
In the above figures, the reference numerals have the following meanings:
1-an air inlet channel; 2-valve seat ring; 3-a combustion chamber; 4-the raceway main top plane; 5-seat ring auxiliary top plane; 6-seat ring top inclined plane; 7-an air outlet guide part; 8-sealing band portion; 9-airway orifice.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
As one aspect of the present invention, there is provided a valve seat insert comprising an inner wall;
the inner wall comprises an air passage opening part, a sealing strip part and an air outlet guide part in sequence; the wall surfaces of the air passage opening part, the sealing strip part and the air outlet guide part are respectively conical surfaces with gradually increased inner diameters along the airflow direction.
It is worth mentioning that the air flow direction is the air flow direction of the air inlet channel, and the air flow direction firstly passes through the mouth part of the air channel, then passes through the sealing belt part, and finally passes through the trend of the air outlet guide part.
In the embodiment of the present invention, the included angle of the conical generatrix of the mouth of the air passage on the same axial center plane is 60-70 °.
In an embodiment of the utility model, the utility model provides an all be the awl mouth valve seat circle, the generating line of the cone of the air flue oral area of valve seat circle and cylinder cap combination processing promptly is the acute angle on the same axial plane. The more preferable included angle is 60-70 degrees, so that the cone valve seat ring can effectively increase the air passage tumble ratio.
In the embodiment of the present invention, the included angle between the conical generatrix of the seal strip portion and the same axial center plane is 80 to 100 °.
In the embodiment of the present invention, the sealing band portion is a portion of the valve that contacts the valve seat ring after the valve is closed. Wherein, the included angle of the conical surface generatrix of the seal belt part on the same axial center surface is suitably 80-100 degrees. This is because an excessively large angle blocks the flow of the air flow, and an excessively small angle lowers the tumble ratio of the air passage.
In an embodiment of the present invention, the air outlet guiding portion includes two wall surfaces, the two wall surfaces are tapered surfaces with gradually increasing inner diameters along the air flow direction, and the included angles of the two conical surface bus lines on the same axial plane are different.
In an embodiment of the present invention, the valve seat ring further includes an outer wall top portion and an outer wall side portion;
the top of the outer wall, the side of the outer wall and the inner wall form a structure with a special-shaped section;
wherein, the outer wall top includes multistage ladder wall.
The utility model discloses an in the embodiment, adopt outer wall top, outer wall lateral part and inner wall to be special-shaped structure around forming the cross-section, mainly be the cross-sectional area that the at utmost increases the valve seat circle, guarantee under the prerequisite of export shape, ensure the stability of valve seat circle.
In the embodiment of the utility model, the top of the outer wall comprises three sections of stepped wall surfaces, namely two flat wall surfaces and an inclined wall surface connected with the two flat wall surfaces; the two flat wall surfaces have different heights relative to the joint of the outer wall side and the inner wall.
The embodiment of the utility model provides an in, the maximum height and the maximum width ratio of the axial cross-section of valve seat circle are 1.3 ~ 1.5.
In the embodiment of the utility model, the valve seat circle is installed in a seat circle mounting hole, and one of them flat wall is in order to fix a position with seat circle mounting hole interference fit, and another flat wall and skew wall respectively with seat circle mounting hole clearance fit.
In the embodiment of the present invention, the included angle between the extension plane of the inclined wall surface at the top of the outer wall and the extension plane of the side part of the outer wall is 50 to 60 °.
In the embodiment of the present invention, the included angle between the extension plane of the inclined wall surface at the top of the outer wall and the extension plane of the side portion of the outer wall is preferably 50 ° to 60 °. The reason is that in the working process of an engine, the valve seat ring and the cylinder cover are subjected to thermal load, the cylinder cover and the valve seat ring expand under the condition of heating, and a larger interference amount must be designed for ensuring that the valve seat ring does not fall off due to different materials, different linear expansion coefficients and different expansion amounts of the cylinder cover and the valve seat ring. However, if the length of the interference contact surface (i.e., the side portion of the outer wall of the valve seat) of the valve seat is small, the valve seat may be crushed when the interference is large, and therefore, the length of the interference contact surface needs to be increased as much as possible to reduce the pressure of the contact surface.
In another embodiment of the present invention, the valve seat insert further comprises an outer wall top portion and an outer wall side portion;
the top of the outer wall, the side of the outer wall and the inner wall form a structure with a triangle-like cross section.
The embodiment of the utility model provides an in, the maximum height and the maximum width ratio of the axial cross-section of valve seat circle are 1.0 ~ 1.2.
As another aspect of the utility model, still provide a gasoline engine, include the valve seat circle as above-mentioned.
The technical solution of the present invention is further described below with reference to specific examples, but it should be noted that the following examples are only for illustrating the technical solution of the present invention, but the present invention is not limited thereto.
Example 1
As shown in fig. 2, the valve seat ring 2 of embodiment 1 has an irregular shape in axial cross section, wherein the valve seat ring 2 has an irregular shape structure formed by the top of the outer wall, the side of the outer wall, and the inner wall in axial cross section;
as shown in figure 3, the top of the outer wall of the valve seat ring 2 is provided with two flat wall surfaces with different heights, which are defined as a seat ring main top plane 4 and a seat ring auxiliary top plane 5, and the two flat wall surfaces are connected through an inclined wall surface, namely a seat ring top inclined surface 6.
Valve seat circle 2 is fixed a position through seat circle owner top plane 4, and seat circle vice top plane 5 and seat circle top inclined plane 6 are clearance fit, or through seat circle vice top plane 5 location, and seat circle owner top plane 4 and seat circle top inclined plane 6 are clearance fit, and 2 at utmost increase valve seat circle 2 cross-sectional areas of valve seat circle, guarantee under the prerequisite of export shape, ensure 2 stability of valve seat circle.
An included angle alpha between a seat ring top inclined plane 6 on the valve seat ring 2 and a conical surface generatrix of the side part of the outer wall is 50-60 degrees, as shown in figure 4.
When alpha is 0 degree, the top inclined plane 6 of the seat ring is parallel to the side part of the outer wall, a circle of small bulge appears on the valve seat ring 2, the processing rejection rate of the valve seat ring 2 is increased, and meanwhile, the situation that the bulge is broken easily appears in the installation process of the valve seat ring 2 is shown in figure 5.
When the alpha is 90 degrees, if the ratio of the section height L1 to the width L2 is still kept to be 1.3-1.5, an air passage opening with a large influence on the air passage tumble ratio is processed during processing, and the air passage performance is influenced.
Therefore, alpha is selected to be 50-60 degrees, which not only can ensure the strength of the valve seat ring 2, but also can not interfere the air inlet channel 1.
As shown in fig. 2 to 4, the included angle of the generatrix of the tapered surfaces of the seal strip portions 8 on the same axial center plane is 80 ° to 100 °.
As shown in fig. 2, after the valve seat ring 2 is mounted on the seat ring mounting hole of the cylinder cover, the valve seat ring is combined with the cylinder cover to process the shape of the air passage opening, and the angle β of the combined processing position of the cylinder cover and the air passage (i.e. the included angle of the conical surface generatrix of the air passage opening 9 on the same axial plane) is 60-70 °.
The function is as follows: effectively increase 1 gas outlet area in intake duct, under the condition of guaranteeing 1 tumble ratio in the intake duct, furthest increases the flow coefficient.
When the angle beta is too small, which is equivalent to a cylindrical shape after being processed (similar to the situation of fig. 1), the air flow is guided to directly enter the cylinder vertically from the side surface of the valve, and the tumble flow cannot be formed. When the angle β is too large, the valve seat ring 2 or the intake duct 1 is machined during machining.
Further, as shown in fig. 6, the ratio of the axial sectional height L1 to the width L2 of the valve seat 2 of embodiment 1 is 1.3 to 1.5.
Example 2
As shown in fig. 7 and 8, the present embodiment 2 is the same as the valve seat 2 of embodiment 1, except that the valve seat 2 of embodiment 2 is surrounded by the top portion of the outer wall, the side portion of the outer wall, and the inner wall to form a structure having a triangular cross section.
The valve seat ring 2 of the embodiment 2 is positioned through the top of the outer wall, and the side part of the outer wall is in interference fit, so that the stability of the valve seat ring 2 is ensured.
Further, as shown in fig. 8, the ratio of the axial sectional height L1 to the width L2 of the valve seat 2 of embodiment 2 is 1.0 to 1.2.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A valve seat insert comprising an inner wall;
the inner wall comprises an air passage opening part, a sealing band part and an air outlet guide part in sequence; the wall surfaces of the air passage opening part, the sealing strip part and the air outlet guide part are respectively conical surfaces with gradually increased inner diameters along the airflow direction.
2. The valve seat ring of claim 1, wherein the included angle of the generatrices of the conical surfaces of the mouth parts of the gas passages on the same axial center plane is 60-70 degrees;
the included angle of the conical surface generatrix of the sealing belt part on the same axial center surface is 80-100 degrees;
the air outlet guide part comprises two sections of wall surfaces, the two sections of wall surfaces are conical surfaces with gradually increased inner diameters along the airflow direction, and included angles of conical surface buses of the two sections of wall surfaces in the same axis surface are different.
3. The valve seat insert of claim 1, further comprising an outer wall top and an outer wall side;
the top of the outer wall, the side part of the outer wall and the inner wall form a structure with a special-shaped section;
wherein, the outer wall top includes multistage ladder wall face.
4. The valve seat insert of claim 3, wherein the outer wall top includes three stepped wall surfaces, respectively two flat wall surfaces and a slanted wall surface connecting the two flat wall surfaces; the two flat wall surfaces have different heights relative to the joint of the outer wall side part and the inner wall.
5. The valve seat insert as claimed in claim 3, wherein a ratio of a maximum height to a maximum width of an axial cross section of the valve seat insert is 1.3 to 1.5.
6. The valve seat insert of claim 4, wherein the valve seat insert is mounted in a seat insert mounting hole, wherein one of the flat and angled walls is interference fit with the seat insert mounting hole for positioning, and the other of the flat and angled walls is clearance fit with the seat insert mounting hole, respectively.
7. The valve seat insert as claimed in claim 3, wherein the extension plane of the inclined wall surface of the top portion of the outer wall and the extension plane of the side portion of the outer wall form an angle of 50 ° to 60 °.
8. The valve seat insert of claim 1, further comprising an outer wall top and an outer wall side;
the top of the outer wall, the side part of the outer wall and the inner wall surround to form a structure with a triangular-like section.
9. The valve seat insert as claimed in claim 8, wherein a ratio of a maximum height to a maximum width of an axial cross section of the valve seat insert is 1.0 to 1.2.
10. A gasoline engine comprising a valve seat insert as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021356010.6U CN212535802U (en) | 2020-07-10 | 2020-07-10 | Valve retainer reaches gasoline engine including it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021356010.6U CN212535802U (en) | 2020-07-10 | 2020-07-10 | Valve retainer reaches gasoline engine including it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212535802U true CN212535802U (en) | 2021-02-12 |
Family
ID=74521840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021356010.6U Active CN212535802U (en) | 2020-07-10 | 2020-07-10 | Valve retainer reaches gasoline engine including it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212535802U (en) |
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2020
- 2020-07-10 CN CN202021356010.6U patent/CN212535802U/en active Active
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