CN214403728U - Engine silencer and engine - Google Patents

Abstract

The utility model belongs to the technical field of the engine spare part, a engine silencer and engine is provided, wherein, engine silencer includes casing and intake pipe, the inner wall of intake pipe covers there is the bush, the material melting point of bush is higher than the material melting point of intake pipe. The utility model provides an engine silencer and engine can protect the intake pipe through the bush, avoids being connected between the intake pipe of silencer and the casing and became invalid, but also simplified the manufacturing process of silencer, reduced manufacturing cost.

Description

Engine silencer and engine

Technical Field

The utility model relates to an engine parts technical field, concretely relates to engine silencer and engine.

Background

The engine muffler is an important component of an engine, and is used for reducing noise generated by the engine, reducing vibration and further improving the use comfort of equipment.

The engine silencer mainly comprises a shell, an air inlet pipe and an air outlet pipe. In some scenes, the melting point that has the intake pipe is less than the condition of the temperature of waste gas, for example in the unmanned aerial vehicle engine field, the engine silencer chooses for use the aluminum alloy material to make usually, the melting point of aluminum alloy material is lower, and the exhaust temperature of unmanned aerial vehicle engine is higher again usually, therefore the intake pipe is easy to be cracked to cause to be connected between intake pipe and the casing and become invalid.

The invention patent with the publication number of CN111550299A provides a two-stroke four-cylinder piston engine silencer for small and medium-sized unmanned aerial vehicles, wherein a reinforcing plate is welded between an air inlet pipe and a silencing assembly of the silencer, so that the thickness of a joint is increased, the welding strength and reliability of the joint of the air inlet pipe and the silencing assembly are improved, and fatigue fracture caused by long-time work is avoided. Although the scheme can avoid the connection failure of the air inlet pipe and the shell, the defects of relatively complex process and relatively high cost exist.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing an engine silencer and engine to be connected inefficacy between the intake pipe of avoiding the silencer and the casing, and can simplify the manufacturing process and the reduction in manufacturing cost of silencer.

In a first aspect, the utility model provides an engine silencer, including casing and intake pipe, the inner wall of intake pipe covers there is the bush, the material melting point of bush is higher than the material melting point of intake pipe.

Further, a heat insulation layer is arranged between the outer wall of the lining and the inner wall of the air inlet pipe.

Further, the thermal insulation layer is made of a thermal insulation material.

Further, the heat insulation layer is an air layer.

Further, the outer diameters of the two ends of the bushing are respectively adapted to the inner diameters of the two ends of the air inlet pipe, and the outer diameter of the bushing and/or the inner diameter of the air inlet pipe are/is changed from the air inlet end to the air outlet end, so that the air layer is formed.

Further, the bushing comprises a straight tubular body part and a positioning boss which is arranged at the air inlet end of the body part and protrudes along the radial direction, the air inlet end of the air inlet pipe is provided with a positioning groove matched with the positioning boss, and the inner diameter of the air inlet pipe is gradually increased from the air outlet end to the positioning groove.

Further, the length of the bushing is greater than the length of the intake pipe.

Further, the material of intake pipe is the aluminum alloy, the material of bush is stainless steel.

Further, a reinforcing rib is arranged between the shell and the air inlet pipe.

In a second aspect, the present invention further provides an engine, which includes the muffler of any one of the above aspects.

The utility model has the advantages that:

1. the utility model provides a pair of engine silencer and engine through set up the bush in the intake pipe, and the material melting point of bush is higher than the material melting point of intake pipe to utilize the bush to absorb the heat in the waste gas, and then reduce the temperature of intake pipe, avoid being connected between the intake pipe of silencer and the casing and become invalid. The bush is easy to process and manufacture, so that the manufacturing process of the silencer is simplified and the manufacturing cost is reduced.

2. The utility model provides a pair of engine silencer and engine, the air bed that hollow structure formed through between bush and intake pipe can further reduce the temperature of intake pipe, and the structure of this air bed has processing simple manufacture's advantage equally.

3. The utility model provides a pair of engine silencer and engine, through the casing with be provided with the strengthening rib between the intake pipe, the strengthening rib can prevent equally to be connected between intake pipe and the casing and become invalid, and the preparation simple process of strengthening rib, the cost of manufacture is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of an engine muffler according to an embodiment of the present invention;

fig. 2 is a perspective view of an engine muffler according to an embodiment of the present invention;

fig. 3 is an enlarged schematic view of a portion a in fig. 1.

Reference numerals:

10. an air inlet pipe; 11. positioning a groove; 12. reinforcing ribs; 13. an air layer; 20. a housing; 30. an oxygen sensor; 40. an air outlet pipe; 50. a bushing; 51. a body portion; 52. and (5) positioning the boss.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 3, the present embodiment provides an engine muffler including a housing 20, an intake pipe 10, and an outlet pipe 40.

The air inlet end of the air inlet pipe 10 is integrally formed with a bolt disc, and is connected with an engine exhaust pipe through the bolt disc in a bolt mode, and the air outlet end of the air inlet pipe 10 is integrally formed with the shell 20 and is communicated with the interior of the shell 20. The inner wall of the air inlet pipe 10 is covered with the lining 50, the material melting point of the lining 50 is higher than that of the air inlet pipe 10, and heat in waste gas is absorbed through the lining 50, so that the temperature of the air inlet pipe 10 is reduced, and connection failure between the air inlet pipe 10 of the silencer and the shell 20 is avoided.

The liner 50 does not necessarily cover the entire inner wall of the air intake pipe 10, for example, a portion of the inner wall of the air intake pipe 10 near the outlet end may not be covered by the liner 50, and it is preferable that the liner 50 covers the entire inner wall of the air intake pipe 10, in which case the length of the liner 50 is at least equal to the length of the air intake pipe 10, and when the length of the liner 50 is appropriately larger than the length of the air intake pipe 10, the liner 50 can absorb more heat, thereby providing a better protection effect to the air intake pipe 10.

The bushing 50 and the air inlet pipe 10 can be connected or assembled by clamping, screwing, bonding or other connection methods, as long as the bushing 50 and the air inlet pipe 10 are kept relatively still in the working process.

The air inlet end of the air outlet pipe 40 extends into the shell 20, a plurality of noise reduction holes are formed in the air inlet end, and the air outlet end of the air outlet pipe 40 extends out of the shell 20. An oxygen sensor 30 is also mounted on the housing 20, the oxygen sensor 30 being in communication with the interior of the housing 20.

In one embodiment, a thermal insulation layer is provided between the outer wall of the liner 50 and the inner wall of the air inlet tube 10. The thermal insulation layer may further reduce the temperature of the inlet tube 10, thereby further improving the protection effect of the inlet tube 10.

The insulation layer may be a solid structure, such as made of insulation material, such as fiberglass, asbestos, rock wool, silicates, aerogel blankets, and vacuum panels. The melting point of the insulating material is higher than the melting point of the lining 50, so that the air inlet tube 10 is better protected by the insulating material. The heat insulating material is fixed between the outer wall of the liner 50 and the inner wall of the intake pipe 10 by means of bonding, clamping, or the like.

The insulation layer may also be a dummy structure, such as an air layer 13. Specifically, the outer diameters of both ends of the liner 50 are respectively adapted to the inner diameters of both ends of the intake pipe 10, and the outer diameter of the liner 50 and/or the inner diameter of the intake pipe 10 are varied from the intake end to the exhaust end, thereby forming the air layer 13. The outer diameters of both ends of the liner 50 are respectively adapted to the inner diameters of both ends of the intake pipe 10 so that the air layer 13 is kept in a relatively sealed state and the air of the air layer 13 is kept in a substantially stationary (i.e., non-flowable) state. The outer diameter of the liner 50 and/or the inner diameter of the air inlet pipe 10 change from the air inlet end to the air outlet end, the change may be that the outer diameter of the liner 50 gradually increases from the air inlet end to the air outlet end, or the inner diameter of the air inlet pipe 10 gradually decreases from the air inlet end to the air outlet end, or a combination of the two changes, of course, other more complicated changes may also form the air layer 13, but this may increase the manufacturing cost of the air inlet pipe 10 or the liner 50.

In one embodiment, the bushing 50 includes a straight tubular body 51 and a radially protruding positioning boss 52 disposed at an air inlet end of the body 51, the outer diameter of the body 51 is maintained constant, and the outer diameter of the positioning boss 52 is also maintained constant and larger than the outer diameter of the body 51. The inlet end of the inlet pipe 10 has a positioning groove 11 corresponding to the positioning boss 52, and the inner diameter of the inlet pipe 10 gradually increases from the outlet end to the positioning groove 11, thereby forming the air layer 13. This arrangement both reduces the cost of manufacturing the air inlet tube 10 and/or the liner 50 and facilitates assembly of the liner 50 into the air inlet tube 10.

In one embodiment, the material of the air inlet tube 10 is aluminum alloy and the material of the liner 50 is stainless steel. The aluminum alloy is the commonly used material of unmanned aerial vehicle engine, and stainless steel has corrosion-resistant advantage, and the melting point is higher than the aluminum alloy again, consequently is fit for being used for making bush 50.

In one embodiment, a reinforcing rib 12 is disposed between the housing 20 and the air inlet pipe 10, the reinforcing rib 12 connects the housing 20 and the air inlet pipe 10, the reinforcing rib 12 may be integrally connected with the housing 20 and the air inlet pipe 10, or may be fixedly connected by welding, and the manufacturing process of the reinforcing rib 12 is simple regardless of the connection mode. The number of the reinforcing ribs 12 is usually plural, preferably four, and four reinforcing ribs 12 are distributed around the circumferential direction of the intake pipe 10. The reinforcing ribs 12 are arranged to further increase the connection strength between the air inlet pipe 10 and the shell 20, and further avoid connection failure between the air inlet pipe 10 and the shell 20.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (9)

1. An engine muffler, includes casing and intake pipe, its characterized in that: the inner wall of intake pipe covers there is the bush, the material melting point of bush is higher than the material melting point of intake pipe, the outer wall of bush with be provided with the insulating layer between the inner wall of intake pipe.

2. The engine muffler of claim 1, wherein: the heat insulation layer is made of heat insulation materials.

3. The engine muffler of claim 1, wherein: the heat insulation layer is an air layer.

4. The engine muffler of claim 3, wherein: the outer diameter at both ends of bush respectively with the internal diameter at both ends of intake pipe suits, the external diameter of bush and/or the internal diameter of intake pipe changes from the inlet end to the end of giving vent to anger, thereby forms the air bed.

5. The engine muffler of claim 4, wherein: the bushing comprises a straight tubular body part and a positioning boss which is arranged at the air inlet end of the body part and protrudes along the radial direction, the air inlet end of the air inlet pipe is provided with a positioning groove matched with the positioning boss, and the inner diameter of the air inlet pipe is gradually increased from the air outlet end to the positioning groove.

6. The engine muffler of claim 1, wherein: the length of the bushing is greater than the length of the intake pipe.

7. The engine muffler according to any one of claims 1 to 6, characterized in that: the material of intake pipe is the aluminum alloy, the material of bush is stainless steel.

8. The engine muffler of claim 1, wherein: and a reinforcing rib is arranged between the shell and the air inlet pipe.

9. An engine, characterized in that: comprising an engine muffler according to any of claims 1-8.

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