Air inlet pipe and engine
By setting grooves on the inner wall of the intake pipe and using a drag-reducing coating, the energy loss caused by the collision and friction between the intake gas and the inner wall is solved, thereby achieving the effect of increasing the intake volume and vortex ratio.
Patent Information
- Application Number
- CN202520142158.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In the prior art, the intake gas in the engine's intake manifold impacts or rubs against the inner wall, resulting in energy loss, turbulent kinetic energy loss, reduced intake swirl ratio, and reduced intake volume.
Multiple grooves are provided on the inner wall of the intake pipe, with the sidewalls of the grooves gradually increasing in size. A drag-reducing coating can be used to reduce friction, increase the fluid boundary layer thickness, and reduce the velocity gradient, thereby reducing the collision and friction loss between the gas and the inner wall.
By reducing turbulent kinetic energy loss, the intake vortex ratio is increased, thereby increasing the intake volume.
Smart Images
Figure CN223562947U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of engine, especially an air inlet pipe and engine. BACKGROUND
[0002] In prior art, the intake gas at the air inlet pipe of engine will impact or rub against the inner wall of air inlet pipe, which will cause energy loss of intake gas, result in turbulent kinetic energy loss of intake gas, reduce intake swirl ratio and decrease the air intake of air inlet pipe. SUMMARY
[0003] The utility model provides an air inlet pipe, the air inlet pipe can make that the turbulent kinetic energy loss of intake gas is little, has increased the intake swirl ratio, reached the effect of increasing air intake.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0005] An air inlet pipe, comprising a pipeline body;
[0006] The pipeline body extends along a first direction, the inner wall of the pipeline body has a plurality of grooves extending along the first direction, and the plurality of grooves are arranged along the circumference of the inner wall of the pipeline body.
[0007] In the direction of the groove bottom of the groove pointing to the groove opening of the groove, the distance between the two side walls of the groove gradually increases.
[0008] Optionally, the side wall of the groove is inclined, or the side wall of the groove is arc-shaped.
[0009] Optionally, the cross-sectional shape of the groove is V-shaped, circular arc-shaped or trapezoidal.
[0010] Optionally, along the circumference of the inner wall of the pipeline body, the sum of the groove opening widths of the plurality of grooves is greater than or equal to one-third of the inner wall circumference of the pipeline body.
[0011] Optionally, the plurality of grooves are uniformly arranged along the circumference of the inner wall of the pipeline body.
[0012] Optionally, the distance between two adjacent grooves is zero.
[0013] Optionally, it further comprises a drag-reducing coating, which covers the inner wall of the pipeline body and the inner wall of the groove, and the surface roughness of the drag-reducing coating is lower than the surface roughness of the inner wall of the pipeline body.
[0014] Optionally, the thickness of the drag-reducing coating is less than 0.1mm.
[0015] Optionally, at the groove, the drag-reducing coating forms a groove with the groove;
[0016] The depth of the groove is less than or equal to 1mm, and the width of the opening of the groove is less than or equal to 2mm.
[0017] The utility model provides a kind of engine, including any kind of air inlet pipe provided in the above technical scheme.
[0018] The utility model embodiment provides a kind of air inlet pipe and engine, in the air inlet pipe, including pipeline body, the inner wall of pipeline body is provided with groove, along the direction of the groove bottom of groove 11 to the opening of groove 11, the distance between the two side walls of groove 11 gradually increases, the groove on the inner wall of pipeline body can produce positive disturbance to fluid boundary layer, increase fluid boundary layer thickness and reduce boundary layer velocity gradient, can reduce the surface friction of air inlet pipe, so that the energy loss generated by the impact or friction of inlet gas and air inlet pipe inner wall also reduces, so that inlet gas turbulent energy loss is less, increases inlet swirl ratio, reaches the effect of increasing air intake. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 For the structure schematic diagram of the air inlet pipe provided in the utility model embodiment.
[0020] Icon:
[0021] 1-pipeline body;11-groove. DETAILED DESCRIPTION
[0022] The technical scheme in the utility model embodiment will be described clearly and completely in conjunction with the drawings in the utility model embodiment, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0023] Please refer to Figure 1 The utility model provides an air inlet pipe, including pipeline body 1;
[0024] Pipeline body 1 extends along first direction, and the inner wall of pipeline body 1 has multiple grooves 11 extending along first direction, and the multiple grooves 11 are arranged along the circumference of the inner wall of pipeline body 1;
[0025] Along the direction of the groove bottom of groove 11 to the opening of groove 11, the distance between the two side walls of groove 11 gradually increases.
[0026] The utility model discloses an air inlet pipe, including pipeline body 1, the inner wall of pipeline body 1 is provided with groove 11, along the direction of the slot bottom of groove 11 to the slot of groove 11, the distance between the two side walls of groove 11 gradually increases, and the groove 11 on the inner wall of pipeline body 1 can produce positive disturbance to fluid boundary layer, increase fluid boundary layer thickness and reduce boundary layer velocity gradient, which can reduce the surface friction of air inlet pipe, so that the energy loss caused by the impact or friction of inlet gas and air inlet pipe inner wall is also reduced, the turbulent kinetic energy loss of inlet gas is smaller, the inlet swirl ratio is increased, and the effect of increasing air intake is achieved.
[0027] In the utility model embodiment, the side wall of the groove 11 can be inclined, or the side wall of the groove 11 can be arc-shaped, which is simple in structure and easy to manufacture.
[0028] Specifically, the cross-sectional shape of the groove 11 can be V-shaped, circular arc-shaped, or trapezoidal, or other shapes, which are not limited here and are determined according to actual conditions.
[0029] In the utility model embodiment, the sum of the slot widths of the plurality of grooves 11 is greater than or equal to one-third of the inner wall circumference of the pipeline body 1 along the circumferential direction of the inner wall of the pipeline body 1, which can better reduce the surface friction of the air inlet pipe inner wall.
[0030] Specifically, the plurality of grooves 11 can be uniformly arranged along the circumferential direction of the inner wall of the pipeline body 1, which can reduce the surface friction of the air inlet pipe inner wall.
[0031] Specifically, the distance between the two adjacent grooves 11 is zero. That is, in the case where the plurality of grooves 11 are uniformly distributed along the inner wall of the pipeline body 1, the distance between the two adjacent grooves 11 can be set to zero, which can increase the number of grooves 11 as much as possible and better reduce the surface friction of the air inlet pipe inner wall.
[0032] Alternatively, the plurality of grooves 11 can also be unevenly distributed along the circumferential direction of the inner wall of the pipeline body 1, and the grooves 11 are distributed in a predetermined area of the inner wall of the pipeline body 1. The distribution of the plurality of grooves 11 is not limited here and is determined according to actual conditions.
[0033] In the utility model embodiment, the air inlet pipe further comprises a drag reduction coating, which covers the inner wall of the pipeline body 1 and the inner wall of the groove 11, and the surface roughness of the drag reduction coating is lower than that of the inner wall of the pipeline body 1. The drag reduction coating can reduce the surface roughness of the air inlet pipe inner wall, thereby reducing the flow area and viscous force of the air inlet pipe inner wall surface, and further reducing the surface friction of the air inlet pipe inner wall.
[0034] Specifically, the material of the above-mentioned drag reduction coating can be epoxy resin, which is not limited here and is determined according to actual conditions.
[0035] Specifically, the thickness of the drag-reducing coating can be less than 0.1 mm, and the thin thickness of the drag-reducing coating does not affect the arrangement of the groove 11 on the pipeline body 1.
[0036] Specifically, at the groove 11, the drag-reducing coating can form a groove along with the groove 11; the depth of the groove can be less than or equal to 1 mm, and the width of the opening of the groove can be less than or equal to 2 mm, so that the groove is a microstructure, which is beneficial to reduce the friction of the inner wall surface of the intake pipe.
[0037] The utility model also provides a kind of engine, including any kind of intake pipe provided in the above technical solution.
[0038] In the engine provided by the utility model embodiment, the intake pipe includes the pipeline body 1, the inner wall of the pipeline body 1 is provided with the groove 11, along the direction of the groove bottom of the groove 11 to the opening of the groove 11, the distance between the two side walls of the groove 11 gradually increases, the groove 11 on the inner wall of the pipeline body 1 can produce positive disturbance to fluid boundary layer, increase the thickness of fluid boundary layer and reduce boundary layer velocity gradient, which can reduce the surface friction of the intake pipe, so that the energy loss generated by the impact or friction of intake gas and the inner wall of the intake pipe is also reduced, so that the turbulent energy loss of intake gas is smaller, the intake vortex ratio is increased, and the effect of increasing the intake amount is achieved.
[0039] Obviously, those skilled in the art can make various modifications and variations to the utility model embodiments without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalent technologies, the utility model also intends to include these modifications and variations.
Claims
1. An air intake duct, characterized in that, The pipeline body comprises: The pipeline body extends along a first direction, and an inner wall of the pipeline body has a plurality of grooves extending along the first direction, the plurality of grooves being arranged along a circumference of the inner wall of the pipeline body; In a direction from a groove bottom of the groove to a groove opening of the groove, a distance between two side walls of the groove gradually increases.
2. The air intake tube of claim 1, wherein, The side walls of the groove are bevels, or the side walls of the groove are arcs.
3. The air intake tube of claim 2, wherein, A cross-sectional shape of the groove is a V shape, a circular arc shape, or a trapezoidal shape.
4. The air intake tube of claim 1, wherein, Along the circumference of the inner wall of the pipeline body, a sum of groove opening widths of the plurality of grooves is greater than or equal to one third of a circumference of the inner wall of the pipeline body.
5. The air intake tube of claim 4, wherein, The plurality of grooves are uniformly arranged along the circumference of the inner wall of the pipeline body.
6. The air intake tube of claim 5, wherein, A distance between two adjacent grooves is zero.
7. The air intake tube according to any one of claims 1 to 6, characterized in that A drag-reducing coating is further included, the drag-reducing coating covering the inner wall of the pipeline body and the inner wall of the groove, a surface roughness of the drag-reducing coating being lower than a surface roughness of the inner wall of the pipeline body.
8. The air intake tube of claim 7, wherein, A thickness of the drag-reducing coating is less than 0.1 mm.
9. The air intake tube of claim 7, wherein, At the groove, the drag-reducing coating forms a groove with the groove; A depth of the groove is less than or equal to 1 mm, and a width of a groove opening of the groove is less than or equal to 2 mm.
10. An engine characterized by, The intake pipe comprises the intake pipe according to any one of claims 1-9.