CN211343046U

CN211343046U - Automobile turbo-charged engine valve guide pipe

Info

Publication number: CN211343046U
Application number: CN201922217931.8U
Authority: CN
Inventors: 陈惠莲
Original assignee: Ningbo Jinxin Powder Metallurgy Co ltd
Current assignee: Ningbo Jinxin Powder Metallurgy Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-08-25
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses an automobile turbocharged engine valve guide, including the body of straight tube type structure, body center system has the air vent, and the upper and lower both ends of body are mirror symmetry structure, and the lower tip cutting of body is formed with first conical surface and second conical surface, and the upper end of first conical surface is connected with the lateral wall of body, and the lower extreme of first conical surface passes through first arc surface transition to second conical surface, and the lower extreme of second conical surface is connected to lower terminal surface through second arc surface; the first taper angle of the first conical surface is smaller than the second taper angle of the second conical surface, the radius of the first arc surface is the same as that of the second arc surface, and the diameter of the vent hole is two fifths to one half of the outer diameter of the pipe body. The advantages are that: simple structure, manufacturing, simple to operate, the compactness and the reliability of being connected between valve guide and the assembly portion can be improved in the setting of first conical surface and second conical surface, adopts the arc surface transition between terminal surface and the conical surface, can avoid the edge conquassation and improve valve guide's life.

Description

Automobile turbo-charged engine valve guide pipe

Technical Field

The utility model relates to an automobile engine's accessories especially indicates an automobile turbo-charged engine valve guide, indicates the valve guide who is used for 1.3T discharge capacity turbo-charged engine very much.

Background

The automobile engine valve guide pipe is an important part of an automobile engine, is a guide device of an automobile engine valve, plays a role in guiding the valve and enables heat on a valve rod to be transmitted to a cylinder cover through the valve guide pipe.

The existing general automobile engine cylinder head is provided with a straight pipe type valve guide pipe, but has the defects of poor sealing performance and short service life, and the poor sealing performance of the valve guide pipe easily causes the working temperature in a cylinder head combustion chamber to be increased, thereby causing the power to be reduced and finally causing the service life of an automobile engine to be shortened.

The main function of turbocharging is to improve the displacement of the engine, thereby improving the power and the torque of the engine and enabling the vehicle to be more powerful. After the turbocharger is installed on one engine, the maximum power of the engine can be increased by 40% or even higher compared with the engine without the turbocharger. The small-displacement turbocharged automobile is more popular with consumers nowadays, but after the turbocharger is installed, the pressure and the temperature of the engine during working are greatly increased, so that the service life of the engine is shorter than that of the engine without supercharging under the same displacement, and the mechanical performance and the lubricating performance are affected, which also puts higher requirements on various parts in the turbocharged engine.

Disclosure of Invention

The utility model aims to solve the technical problem that to prior art's current situation, provide simple structure, simple to operate, the leakproofness is good, long service life's an automobile turbocharged engine valve pipe.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a valve guide pipe of an automobile turbocharged engine comprises a pipe body of a straight pipe type structure, wherein an air hole is formed in the center of the pipe body, the upper end and the lower end of the pipe body are of mirror symmetry structures, a first conical surface and a second conical surface are formed by cutting the lower end part of the pipe body, the upper end of the first conical surface is connected with the side wall of the pipe body, the lower end of the first conical surface is transited to the second conical surface through a first arc surface, and the lower end of the second conical surface is connected to the lower end face through a; the first taper angle of the first conical surface is smaller than the second taper angle of the second conical surface, the radius of the first arc surface is the same as that of the second arc surface, and the diameter of the vent hole is two fifths to one half of the outer diameter of the pipe body.

The optimized technical measures further comprise:

the two ends of the vent hole are respectively provided with chamfers.

The first taper angle α of the first taper surface is 7 ° to 17 °.

The second taper angle β of the second taper surface is 40 ° to 50 °.

The radius of the first arc surface is 0.76mm at most.

The utility model discloses an automobile turbocharged engine valve guide, its simple structure, it is convenient to make, adopts both ends mirror symmetry structure, has made things convenient for valve guide's installation, and the tip cutting of body forms first conical surface and second conical surface, and the first cone angle of first conical surface is less than the second conical angle of second conical surface, and like this end structure can improve the compactness and the reliability of being connected between valve guide and the assembly part to guarantee the gas tightness of connection, also can improve valve guide's life; in addition, the end face and the second conical face are in arc surface transition, the first conical face and the second conical face are in arc surface transition, and the end face is a pressure stress face, so that the arc surface transition between the end face and the second conical face can effectively avoid edge crushing.

Drawings

FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 and 2, the structure of the present invention is schematically illustrated,

wherein the reference numerals are: the tube body 1, the side wall 1a, the lower end surface 1b, the vent hole 11, the chamfer 11a, the first conical surface 21, the second conical surface 22, the first arc surface 23 and the second arc surface 24.

As shown in figures 1 and 2 of the drawings,

a valve guide pipe of an automobile turbocharged engine comprises a pipe body 1 of a straight pipe type structure, wherein a vent hole 11 is formed in the center of the pipe body 1, the upper end and the lower end of the pipe body 1 are of mirror symmetry structures, a first conical surface 21 and a second conical surface 22 are formed by cutting the lower end part of the pipe body 1, the upper end of the first conical surface 21 is connected with a side wall 1a of the pipe body 1, the lower end of the first conical surface 21 is transited to the second conical surface 22 through a first arc surface 23, and the lower end of the second conical surface 22 is connected to a lower end surface 1b through a second arc; the first taper angle α of the first taper surface 21 is smaller than the second taper angle β of the second taper surface 22, the first arc surface 23 and the second arc surface 24 have the same radius, and the diameter of the vent hole 11 is two fifths to one half of the outer diameter of the tube body 1.

In this embodiment, the outer diameter of the tube body 1 is 10mm, the length of the tube body 1 is 37mm, and the diameter of the vent hole 11 is 4.5 mm.

In the embodiment, both ends of the vent hole 11 are respectively formed with chamfers 11 a.

The first taper angle α of the first taper surface 21 is 7 ° to 17 °; in this embodiment, the first taper angle α of the first taper surface 21 is 12 °.

The second taper angle β of the second taper surface 22 is 40 ° to 50 °. In the present embodiment, the second taper angle β of the second taper surface 22 is 45 °.

In the embodiment, the radius of the first circular arc surface 23 is 0.76mm at most. The radius of the arc surface is not too large, the larger the radius is, the more gentle the arc surface is, and the too large radius of the arc surface can influence the transition effect of the arc surface.

The valve guide pipe is specially designed for a 1.3T displacement turbocharged engine and is prepared by adopting a powder metallurgy process, the hardness of the valve guide pipe can reach HRB65-90, and the density of the valve guide pipe is 6.4g/cm³To 6.9g/cm³(ii) a The crushing strength reaches more than 450 MPa. The valve guide pipe has the advantages of simple structure, convenient manufacture, good heat resistance, wear resistance and corrosion resistance, strong reliability and long service life.

The second arc surface 24, the second cone surface 22, the first arc surface 23 and the first cone surface 21 are sequentially arranged between the lower end surface 1b and the side wall 1a of the valve guide pipe, the upper end structure and the lower end structure of the valve guide pipe are in mirror symmetry, the lower end surface 1b and the second cone surface 22 are in smooth transition through the second arc surface 24, and the end surface is a pressure stress surface and adopts arc surface transition, so that the edge crushing can be avoided, and the service life of the valve guide pipe is prolonged; the first taper angle alpha of the first taper surface 21 is smaller than the second taper angle beta of the second taper surface 22, so that the end part forms a tapered structure, the valve guide pipe is more convenient to assemble, the connection between the valve guide pipe and the assembling part is tighter, and the air tightness of the connecting part can be effectively improved.

The valve guide pipe adopts a symmetrical structure, so that the valve guide pipe is convenient to assemble, and the assembly efficiency can be effectively improved.

In order to ensure the product quality, sharp corners and burrs are removed after the product is processed, the surface of the product is smooth, so that the good sealing performance of the product is ensured, and meanwhile, the product is strictly inspected, so that the defects of cracks, sand holes and the like are avoided.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The utility model provides an automobile turbocharged engine valve pipe, includes body (1) of straight tube type structure, body (1) central system have air vent (11), characterized by: the upper end and the lower end of the pipe body (1) are of mirror symmetry structures, a first conical surface (21) and a second conical surface (22) are formed at the lower end part of the pipe body (1) in a cutting mode, the upper end of the first conical surface (21) is connected with the side wall (1a) of the pipe body (1), the lower end of the first conical surface (21) is transited to the second conical surface (22) through a first arc surface (23), and the lower end of the second conical surface (22) is connected to the lower end face (1b) through a second arc surface (24); the first taper angle (alpha) of the first taper surface (21) is smaller than the second taper angle (beta) of the second taper surface (22), the radiuses of the first arc surface (23) and the second arc surface (24) are the same, and the diameter of the vent hole (11) is two fifths to one half of the outer diameter of the pipe body (1); chamfers (11a) are respectively arranged at two ends of the vent hole (11); the radius of the first arc surface (23) is 0.76mm at most.

2. The automotive turbocharged engine valve guide of claim 1, wherein: the first taper angle (alpha) of the first taper surface (21) is 7-17 degrees.

3. The automotive turbocharged engine valve guide of claim 2, wherein: the second taper angle (beta) of the second taper surface (22) is 40-50 degrees.