CN117823259A - Valve distribution structure, design method and engine - Google Patents
Valve distribution structure, design method and engine Download PDFInfo
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- CN117823259A CN117823259A CN202410236500.9A CN202410236500A CN117823259A CN 117823259 A CN117823259 A CN 117823259A CN 202410236500 A CN202410236500 A CN 202410236500A CN 117823259 A CN117823259 A CN 117823259A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 244000144730 Amygdalus persica Species 0.000 claims description 16
- 235000006040 Prunus persica var persica Nutrition 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 13
- 238000005086 pumping Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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Abstract
The application discloses a valve distribution structure, a design method and an engine. The air distribution structure comprises a cam, an air valve limiting groove and an air valve comprising a limiting groove connecting structure; the cam is connected with the valve limiting groove, and the limiting groove connecting structure is used for fixedly connecting the valve limiting groove with a valve comprising the limiting groove connecting structure; the valve limiting groove is used for being in a rotary motion state when the cam is in the rotary motion state; the valve is used for being in an up-and-down motion state when the valve limiting groove is in a rotary motion state. Therefore, the valve limiting groove is designed on the cam, and the limiting groove connecting structure is designed on the valve, so that the valve comprising the limiting groove connecting structure can be directly connected with the valve limiting groove. Therefore, the cam drives the valve limiting groove and the valve to move during movement to realize the opening and closing of the valve, and under the condition that the valve is connected with the valve limiting groove, the condition that the valve flies off due to too high movement acceleration of the cam is avoided.
Description
Technical Field
The application relates to the technical field of engines, in particular to a valve distribution structure and a design method of a valve and an engine.
Background
The air distribution structure of the air valve is used for realizing the opening and closing of the air valve. In the related art, the valve distribution structure mainly depends on a cam, a tappet, a push rod, a rocker arm and a valve spring seat to realize opening and closing of a valve, however, when the cam drives the tappet and the rocker arm to move so as to drive the valve to open and close, if the movement acceleration of the cam is too fast, the tappet can be possibly caused to bounce instantly, and at the moment, the tappet is not contacted with the cam any more, so that the valve flies off, and the engine system is caused to be failed. Therefore, how to prevent valve fly-off is a major concern for those skilled in the art.
Disclosure of Invention
Based on the problems, the application provides a valve distribution structure, a design method and an engine for a valve, so as to prevent the valve from flying off. The embodiment of the application discloses the following technical scheme:
in a first aspect, the present application discloses a valve arrangement for a valve, the valve arrangement comprising a cam, a valve limiting groove and a valve comprising a limiting groove connection structure;
the cam is connected with the valve limiting groove, and the limiting groove connecting structure is used for fixedly connecting the valve limiting groove with the valve comprising the limiting groove connecting structure;
the valve limiting groove is used for being in a rotary motion state when the cam is in the rotary motion state;
the air valve is used for being in an up-and-down motion state when the air valve limiting groove is in a rotary motion state.
Optionally, the spacing groove connection structure is including being cylindric throughout structure, will the valve spacing groove with contain spacing groove connection structure's valve fixed connection, include:
and the valve limiting groove is connected with the cylindrical penetrating structure by utilizing a metal wire, so that the valve limiting groove is fixedly connected with a valve comprising the cylindrical penetrating structure.
Optionally, the spacing groove connection structure is including being gear-shaped recess, the valve spacing groove is including being gear-shaped valve spacing groove, will the valve spacing groove with contain spacing groove connection structure's valve fixed connection, include:
the gear-shaped valve limiting groove is clamped with the gear-shaped groove, so that the gear-shaped valve limiting groove is fixedly connected with a valve comprising the gear-shaped groove.
Optionally, the spacing groove connection structure is including being the ball that rolls the form, contain spacing groove connection structure's valve include with spacing groove connection structure connects and be the valve of concave arc formula, will the valve spacing groove with contain spacing groove connection structure's valve fixed connection includes:
and the valve limiting groove is connected with the valve which is connected with the limiting groove connecting structure and is in a concave arc shape by utilizing the ball which is in a rolling shape.
Optionally, the valve comprising the limiting groove connecting structure comprises a valve stem part comprising the limiting groove connecting structure and a valve head part connected with the valve stem part, wherein the valve head part is in a horn shape.
Optionally, the cam includes camshaft and protruding peach, the cam with the valve spacing groove is connected, includes:
the cam shaft and the convex peach are connected with the valve limiting groove;
or,
the convex peach is connected with the valve limiting groove.
Optionally, the cam shaft is circular, and the convex peach is semi-elliptical.
In a second aspect, the present application discloses a method for designing a gas distribution structure, including:
acquiring the center of a cam shaft in a cam and parameters of a valve rod part;
determining the radius of the cam center shaft and the radius of the cam center peach according to the circle center of the cam center shaft;
determining the side radius of the cam shaft and the valve limiting groove according to the radius of the cam shaft and the parameters of the valve rod part;
determining the side radius of the cam middle lobe and the valve gate slot according to the radius of the cam middle lobe and the parameters of the valve stem part;
and designing based on the radius of the cam center cam shaft, the radius of the cam center cam lobe, the side radii of the cam center cam shaft and the valve limiting groove and the side radii of the cam center cam lobe and the valve limiting groove to obtain a gas distribution structure, wherein the gas distribution structure is the gas distribution structure of the first aspect.
Optionally, before determining the radius of the cam shaft and the radius of the cam lobe according to the center of the cam shaft, the method further includes:
acquiring a preset maximum lift;
the determining the radius of the cam center shaft and the radius of the cam center peach according to the circle center of the cam center shaft comprises the following steps:
determining the radius of the cam shaft in the cam according to the circle center of the cam shaft in the cam;
and obtaining the radius of the cam center lobe according to the radius of the cam center lobe shaft and the preset maximum lift.
In a third aspect, the present application provides an engine, which is characterized by comprising a gas distribution structure of a valve, where the gas distribution structure is the gas distribution structure in the first aspect.
Compared with the prior art, the application has the following beneficial effects:
the air distribution structure in this application includes cam, valve spacing groove and contains spacing groove connection structure's valve. The cam is connected with the valve limiting groove, the limiting groove connecting structure is used for fixedly connecting the valve limiting groove with the valve comprising the limiting groove connecting structure, wherein the valve limiting groove is used for being in a rotary motion state when the cam is in the rotary motion state, and the valve is used for being in an up-and-down motion state when the valve limiting groove is in the rotary motion state. Therefore, the valve limiting groove is designed on the cam, and the limiting groove connecting structure is designed on the valve, so that the valve comprising the limiting groove connecting structure can be directly connected with the valve limiting groove. Therefore, the cam drives the valve limiting groove and the valve to move during movement to realize the opening and closing of the valve, and under the condition that the valve is connected with the valve limiting groove, the condition that the valve flies off due to too high movement acceleration of the cam is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural view of a distribution structure of a valve provided in the related art;
fig. 2 is a schematic structural diagram of a gas distribution structure of a valve according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a valve in a valve distribution structure of the valve according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a cam in a distribution structure of a valve according to an embodiment of the present disclosure;
fig. 5 is a flowchart of a design method of a gas distribution structure according to an embodiment of the present application;
fig. 6 is a design structure diagram of a design method of a gas distribution structure according to an embodiment of the present application;
FIG. 7 is a schematic diagram of another embodiment of a method for designing a gas distribution structure;
fig. 8 is a schematic diagram of an air intake and exhaust profile in a method for designing an air distribution structure according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.
It should be noted that, the air distribution structure, the design method and the engine of the air valve provided by the application relate to the technical field of engines, and the above is only an example and does not limit the application field of the method name provided by the application.
As described above, the distribution structure of the valve is used to realize opening and closing of the valve. In the related art, the valve distribution structure mainly depends on a cam, a tappet, a push rod, a rocker arm and a valve spring seat to realize opening and closing of a valve, however, when the cam drives the tappet and the rocker arm to move so as to drive the valve to open and close, if the movement acceleration of the cam is too fast, the tappet can be possibly caused to bounce instantly, and at the moment, the tappet is not contacted with the cam any more, so that the valve flies off, and the engine system is caused to be failed. Therefore, how to prevent valve fly-off is a major concern for those skilled in the art.
As shown in fig. 1, fig. 1 is a schematic structural view of a distribution structure of a valve provided in the related art. In fig. 1, when the cam 1 rotates counterclockwise, the cam 1 pushes up the tappet 2, at this time, the tappet 2 and the push rod 3 push up the left end of the rocker arm 4, the right end of the rocker arm 4 descends, and under the action of the valve spring seat 5, the valve spring 6 moves downward to press the valve 7 to move downward, so that the valve 7 is opened, and a complete air intake process is completed. However, during the opening and closing process of the valve, the cam 1 is required to move up and down against the tappet 2 and the push rod 3, when the movement acceleration of the cam 1 is too fast, the tappet 2 and the push rod 3 may bounce instantaneously, and at this time, the rocker arm 4 may rapidly lower the air valve 7, thereby causing the valve to fly off.
In addition to this, in another related art, in order to solve the problem of the valve fly-off, it is proposed to control the movement acceleration of the cam 1, but when the movement acceleration of the cam 1 is in a small state, there is a possibility that pumping loss increases and gas consumption increases.
The inventor proposes a new air distribution structure of the air valve, the air distribution structure includes cam, air valve spacing groove and air valve comprising spacing groove connection structure, the cam is connected with air valve spacing groove, spacing groove connection structure is used for fixedly connecting air valve spacing groove with air valve comprising spacing groove connection structure; the valve limiting groove is used for being in a rotary motion state when the cam is in the rotary motion state; the valve is used for being in an up-and-down motion state when the valve limiting groove is in a rotary motion state. Therefore, the valve limiting groove is designed on the cam, and the limiting groove connecting structure is designed on the valve, so that the valve comprising the limiting groove connecting structure can be directly connected with the valve limiting groove. Therefore, the cam drives the valve limiting groove and the valve to move during movement to realize opening and closing of the valve, and under the condition that the valve is connected with the valve limiting groove, the condition that the valve flies off due to too high movement acceleration of the cam is avoided, and the cam can also move under high movement acceleration, so that the increase of pumping loss and the increase of gas consumption are avoided.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a gas distribution structure of a valve according to an embodiment of the present application, and as shown in fig. 2:
the air distribution structure in the application comprises a cam 1, an air valve limiting groove 2 and an air valve 4 comprising a limiting groove connecting structure 3. In fig. 2, the outer side of the cam 1 is connected with a valve limit groove 2, and a limit groove connecting structure 3 is used for fixedly connecting the valve limit groove 2 with a valve 4 comprising the limit groove connecting structure 3. Wherein the valve limiting groove 2 is used for being in a rotary motion state when the cam 1 is in the rotary motion state; the valve 4 is used for being in an up-and-down motion state when the valve limiting groove 2 is in a rotation motion state. The limiting groove connecting structure 3 in the present application is hollow.
It can be understood that, because the limit groove connecting structure 3 has fixedly connected the valve limit groove 2 with the valve 4 including the limit groove connecting structure 4, the cam 1 drives the valve limit groove 2 to rotate together when rotating, and the cam 1 and the valve limit groove 2 drive the valve 4 to move up and down when rotating, so as to realize opening and closing of the valve. Therefore, the valve 4 is firmly locked in the valve limiting groove 2 under the action of the limiting groove connecting structure 3, and the valve is ensured not to fly off.
In one implementation, the limiting groove connecting structure 3 includes a cylindrical penetrating structure, and the valve limiting groove 2 can be connected with the cylindrical penetrating structure by using a metal wire, so that the valve limiting groove 2 is fixedly connected with the valve 4 including the cylindrical penetrating structure. It can be understood that the cylindrical penetrating structure is to punch holes on the air valve 4, and then the metal wire is used to connect the hole position on the air valve 4 with the air valve limiting groove 2, so as to realize the fixed connection of the air valve limiting groove 2 and the limiting groove connecting structure 3. The metal wire can be an iron wire or a copper wire, is not particularly limited, and can be adopted according to specific requirements in practical application.
In another implementation manner, the limiting groove connecting structure 3 comprises a gear-shaped groove, the valve limiting groove 2 comprises a gear-shaped valve limiting groove, and the gear-shaped valve limiting groove and the gear-shaped groove can be clamped, so that the gear-shaped valve limiting groove is fixedly connected with the valve 4 comprising the gear-shaped groove. It can be understood that the gear-shaped structure is designed on the inner side of the valve limiting groove to obtain the gear-shaped valve limiting groove, and the limiting groove connecting structure 3 is a groove for cutting the top end of the valve 4 into the gear shape so that the gear-shaped valve limiting groove and the gear-shaped groove can be clamped, thereby realizing the fixed connection of the valve limiting groove 2 and the limiting groove connecting structure 3.
In another implementation manner, the limiting groove connecting structure 3 comprises a rolling ball, the valve 4 comprising the limiting groove connecting structure comprises a valve 4 connected with the limiting groove connecting structure and in a concave arc shape, and the valve limiting groove 2 can be connected with the valve 4 connected with the limiting groove connecting structure and in a concave arc shape by utilizing the rolling ball. It will be appreciated that the tip of the valve 4 may be cut to obtain a valve tip in the form of a concave arc, and then a ball in the form of a roll may be fixed between the valve tip in the form of a concave arc and the valve limiting groove 2. Therefore, when the cam 1 drives the valve limiting groove 2 to rotate together, the rolling ball is in a rolling state, so that the valve 4 which is connected with the limiting groove connecting structure and is in a concave arc shape is driven to move up and down.
As shown in fig. 3, fig. 3 is a schematic structural diagram of a valve in a valve distribution structure of the present application. In the present application, the valve 4 including the limit groove connecting structure includes a valve stem portion including the limit groove connecting structure and a valve head portion connected with the valve stem portion, the valve head portion being horn-shaped. In fig. 3, the structure in the dashed box 5 is a valve stem portion including a limiting groove connection structure, and the structure in the dashed box 6 is a valve head portion connected to the valve stem portion.
As shown in fig. 4, fig. 4 is a schematic structural diagram of a cam in a distribution structure of a valve according to an embodiment of the present application. In fig. 4, the cam 1 includes a cam shaft 7 and a lobe 8, wherein the cam shaft 7 has a circular shape, the lobe 8 has a semi-elliptical shape, and it is understood that the lobe 8 has a structure constituted by a hatched portion. The cam shaft 7 and the convex peach 8 are connected with the valve limiting groove 2. It should be noted that only the protruding peach 8 may be connected to the valve limiting groove 2. In this way, the lower end part of the cam 1 is ensured to be fixedly connected with the valve 4 comprising the limit groove connecting structure.
Therefore, in the alternative scheme, the valve comprising the limit groove connecting structure can be directly connected with the valve limit groove, so that under the condition that the valve is connected with the valve limit groove, the situation that the valve flies off and the engine system breaks down due to the fact that the movement acceleration of the cam is too fast can not exist any more, and the cam can move under the condition of larger movement acceleration, and further pumping loss increase and gas consumption increase are avoided.
The following describes a method for designing a gas distribution structure according to another embodiment.
Referring to fig. 5, the flowchart of a method for designing a gas distribution structure according to an embodiment of the present application, as shown in fig. 5, the method may include:
s501: and acquiring the center of a cam shaft in the cam and parameters of a valve rod part.
As shown in fig. 6 and fig. 7, fig. 6 is a design structure diagram of a design method of a gas distribution structure according to an embodiment of the present application, and fig. 7 is a design structure diagram of a design method of another gas distribution structure according to an embodiment of the present application. In fig. 6, the center O1 of the cam shaft in the cam is first determined, and in fig. 7, the parameter D2 of the valve stem is first determined, it being understood that D2 is the diameter of the connecting structure of the limit groove in the valve.
S502: and determining the radius of the cam center shaft and the radius of the cam center peach according to the circle center of the cam center shaft.
It should be noted that, in the present application, before determining the radius R1 of the cam shaft and the radius R2 of the cam lobe according to the center O1 of the cam shaft, the preset maximum lift Lv may also be obtained. Wherein the preset maximum lift Lv is the maximum lift achievable during valve opening and closing.
Furthermore, after determining the circle center O1 of the cam shaft in the cam, the radius R1 of the cam shaft in the cam can be determined quickly, and then the radius of the cam shaft in the cam and the preset maximum lift can be calculated by utilizing a cam radius formula to obtain the radius of the cam in the cam. Wherein the convex peach radius formula is: r2=r1+lv.
S503: and determining the side radiuses of the cam shaft and the valve limiting groove according to the radius of the cam shaft and the parameters of the valve rod part.
Further, in the present application, the radius R1 of the cam shaft and the parameter D2 of the valve stem portion in the cam may be calculated according to a cam shaft side radius formula, so as to obtain the side radius R4 of the cam shaft and the valve limiting groove in the cam. The formula of the side radius of the cam shaft is as follows: r4=r1+k·d2, k is a proportionality coefficient, and k is 2.ltoreq.k.ltoreq.4.
S504: and determining the side radii of the cam middle lobe and the valve limiting groove according to the radius of the cam middle lobe and the parameters of the valve rod part.
Further, in the present application, the radius R2 of the cam center lobe and the parameter D2 of the valve stem portion may be calculated according to the lobe side radius formula, to obtain the side radius R3 of the cam center lobe and the valve limiting groove. Wherein the convex peach side radius formula is: r3=r2+kd2, k is a proportionality coefficient, and k is equal to or more than 2 and equal to or less than 4.
S505: and designing based on the radius of the cam middle cam shaft, the radius of the cam middle cam lobe, the side radii of the cam middle cam shaft and the valve limiting groove and the side radii of the cam middle cam lobe and the valve limiting groove to obtain a gas distribution structure.
The air distribution structure is the air distribution structure in the process, and after the radius R1 of the cam middle cam shaft, the radius R2 of the cam middle cam lobe, the side radius R4 of the cam middle cam shaft and the valve limiting groove and the side radius R3 of the cam middle cam lobe and the valve limiting groove are determined, the air distribution structure can be obtained according to the multiple parameter designs. The unit of the parameters in this application is mm.
In an implementation manner, after the circle center O1 of the cam center cam shaft, the parameter D1 of the valve stem portion and the radius R1 of the cam center cam shaft are obtained, the transverse distance L and the longitudinal distance H between the excessive arc circle center O2 of the cam center cam and the circle center O1 of the cam center cam shaft can be determined according to the parameter D1 of the valve, wherein the parameter D1 of the valve is the diameter of the valve stem portion, and the transverse distance L and the longitudinal distance H are determined according to 0.7R1L being less than or equal to 1.3R1 and 0.7R1H being less than or equal to 1.3R1. Further, the parameter R5 and the parameter R6 can be determined according to the relative position of the center O2 of the excessive arc of the convex peach in the cam and the center O1 of the convex wheel shaft in the cam, wherein the parameter R6 is obtained by determining R6=R5+k.D2, k is a proportionality coefficient, and k is more than or equal to 2 and less than or equal to 4. Therefore, according to the various parameters, a structure which can enable the valve limiting groove to be fixedly connected with the valve can be designed, and structural stability is improved.
It should be noted that, the parameter D1 of the valve needs to ensure the structural strength of the valve, and maintain sufficient supporting strength, so as to prevent the valve from flying off, and the parameter D1 of the valve may be designed within the following ranges: 0.2D1H is less than or equal to 0.6R1, wherein the top end of the valve rod can be in a circular arc, oval or circular arc chamfer and other structures in order to ensure that the valve runs smoothly in the valve limiting groove.
It should be further noted that the left and right side molded lines of the cam center lobe are obtained according to straight lines and excessive arc designs, and the left and right side molded lines of the cam center lobe adopt symmetrical structures, and the cam center cam shaft adopts a vertical axis symmetrical structure (which may be asymmetrical). The cam shaft in the cam can rotate anticlockwise, the right side is an opening molded line, and the left side is a closing molded line; the cam shaft in the cam can also rotate anticlockwise, the right side is a closing molded line, the left side is an opening molded line, and the rotating direction of the cam shaft in the cam can be changed according to actual conditions.
As shown in fig. 8, fig. 8 is a schematic diagram of an air intake and exhaust profile in a method for designing an air distribution structure according to an embodiment of the present application. The intake profile (open segment shown on the left side) and the exhaust profile (open segment shown on the right side) shown in fig. 8 are profile diagrams generated by the lift and the crank angle obtained in actual use of the valve structure designed and obtained according to the scheme of the present application. It should be noted that, in this application, the profile of admitting air and exhausting is close to and at the ideal profile of admitting air and exhausting of valve opening and closing in-process, can realize in this application that the valve flies off, also can avoid pumping loss increase and gas consumption increase to promote fuel economy.
In addition, the invention also discloses an engine, which comprises a gas distribution structure of the valve, wherein the gas distribution structure of the valve is the gas distribution structure of the valve disclosed in the embodiment, so that the engine with the gas distribution structure of the valve has all the technical effects and is not repeated herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
It should be noted that, in the embodiments of the present application, the "first" and the "second" in the names of "first" and "second" (where any exists) are only used to make name identifiers, and do not represent the first and second in sequence.
The valve distribution structure, the design method and the engine of the valve are described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
Claims (10)
1. The valve distribution structure of the valve is characterized by comprising a cam, a valve limiting groove and a valve comprising a limiting groove connecting structure;
the cam is connected with the valve limiting groove, and the limiting groove connecting structure is used for fixedly connecting the valve limiting groove with the valve comprising the limiting groove connecting structure;
the valve limiting groove is used for being in a rotary motion state when the cam is in the rotary motion state;
the air valve is used for being in an up-and-down motion state when the air valve limiting groove is in a rotary motion state.
2. A gas distribution structure according to claim 1, wherein the limiting groove connection structure comprises a cylindrical penetrating structure, and the fixedly connecting the valve limiting groove with the valve comprising the limiting groove connection structure comprises:
and the valve limiting groove is connected with the cylindrical penetrating structure by utilizing a metal wire, so that the valve limiting groove is fixedly connected with a valve comprising the cylindrical penetrating structure.
3. A gas distribution structure according to claim 1, wherein the limit groove connection structure comprises a gear-like groove, the valve limit groove comprises a gear-like valve limit groove, the valve limit groove is fixedly connected with the valve comprising the limit groove connection structure, comprising:
the gear-shaped valve limiting groove is clamped with the gear-shaped groove, so that the gear-shaped valve limiting groove is fixedly connected with a valve comprising the gear-shaped groove.
4. A gas distribution structure according to claim 1, wherein the limit groove connection structure comprises a ball in a rolling shape, the valve comprising the limit groove connection structure comprises a valve connected with the limit groove connection structure and in a concave arc shape, the valve limit groove is fixedly connected with the valve comprising the limit groove connection structure, and the gas distribution structure comprises:
and the valve limiting groove is connected with the valve which is connected with the limiting groove connecting structure and is in a concave arc shape by utilizing the ball which is in a rolling shape.
5. A valve structure according to claim 1, wherein the valve comprising a limiting groove connection structure comprises a valve stem comprising a limiting groove connection structure and a valve head connected to the valve stem, the valve head being flared.
6. A valve train according to claim 1, wherein the cam comprises a cam shaft and a lobe, the cam being connected to the valve limiting groove, comprising:
the cam shaft and the convex peach are connected with the valve limiting groove;
or,
the convex peach is connected with the valve limiting groove.
7. A gas distribution structure according to claim 6, wherein the camshaft is circular and the lobes are semi-elliptical.
8. The design method of the gas distribution structure is characterized by comprising the following steps of:
acquiring the center of a cam shaft in a cam and parameters of a valve rod part;
determining the radius of the cam center shaft and the radius of the cam center peach according to the circle center of the cam center shaft;
determining the side radius of the cam shaft and the valve limiting groove according to the radius of the cam shaft and the parameters of the valve rod part;
determining the side radius of the cam middle lobe and the valve gate slot according to the radius of the cam middle lobe and the parameters of the valve stem part;
a gas distribution structure is obtained by designing based on the radius of the cam center cam shaft, the radius of the cam center cam lobe, the side radii of the cam center cam shaft and the valve limiting groove and the side radii of the cam center cam lobe and the valve limiting groove, wherein the gas distribution structure is as claimed in any one of claims 1 to 7.
9. The method of claim 8, further comprising, prior to said determining the radius of the cam-in-cam shaft and the radius of the cam lobe from the center of the cam-in-cam shaft:
acquiring a preset maximum lift;
the determining the radius of the cam center shaft and the radius of the cam center peach according to the circle center of the cam center shaft comprises the following steps:
determining the radius of the cam shaft in the cam according to the circle center of the cam shaft in the cam;
and obtaining the radius of the cam center lobe according to the radius of the cam center lobe shaft and the preset maximum lift.
10. An engine comprising a valve arrangement according to any one of claims 1 to 7.
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| CN202410236500.9A CN117823259B (en) | 2024-03-01 | 2024-03-01 | Valve distribution structure, design method and engine |
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| CN202410236500.9A CN117823259B (en) | 2024-03-01 | 2024-03-01 | Valve distribution structure, design method and engine |
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| CN117823259B (en) | 2024-06-18 |
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