Silencer with adjustable exhaust resistance

Abstract

The utility model relates to the technical field of silencers, and discloses an exhaust resistance adjustable silencer which comprises a shell, two partition plates are arranged in the shell, the interior of the shell is divided into two resonant cavities and a resistive cavity by the two partition plates, the resistive cavity is arranged between the two resonant cavities, and the two partition plates are arranged in the shell. The two partition plates are jointly connected with an air inlet pipe, a connecting pipe and an exhaust pipe, the air inlet pipe, the connecting pipe and the exhaust pipe are each provided with a plurality of resistive holes, adjusting mechanisms are installed in the two resonant cavities, and the output ends of the adjusting mechanisms are connected with sleeves. The two sleeves can adjust the opening degree of the resistive holes in the air inlet pipe and the opening degree of the resistive holes in the connecting pipe respectively, the end, deviating from the corresponding sleeve, of the air inlet pipe is an inlet, the inlet extends out of the shell, and the end, deviating from the inlet, of the exhaust pipe extends out of the shell. And the exhaust resistance can be flexibly adjusted according to actual use requirements, and the applicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, and more specifically, to a muffler with adjustable exhaust resistance. Background Art

[0002] The muffler is a common device used for noise reduction. Its main function is to achieve the effect of noise reduction by preventing the spread of noise. The exhaust resistance of the muffler refers to the degree of its obstruction to the flow of fluid. In fact, it can also be understood as the muffler's ability to block noise. It is an important indicator that affects its noise reduction effect and service life.

[0003] At present, the silencers on the market usually cannot adjust the exhaust resistance. Too small resistance will lead to unsatisfactory noise reduction effect, or even fail to achieve the expected noise reduction effect; too large resistance will increase the air loss, increase the energy consumption of the machine, and affect the noise reduction effect. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a muffler capable of adjusting the exhaust resistance according to actual conditions.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A muffler with adjustable exhaust resistance comprises a shell, wherein two partitions are arranged inside the shell, the two partitions divide the interior of the shell into two resonant cavities and a resistive cavity, the resistive cavity is between the two resonant cavities, an intake pipe, a connecting pipe and an exhaust pipe are commonly connected to the two partitions, a plurality of resistive holes are provided on the intake pipe, the connecting pipe and the exhaust pipe, an adjustment mechanism is installed in the two resonant cavities, a sleeve is connected to the output end of the adjustment mechanism, the two sleeves can respectively adjust the opening of the resistive holes on the intake pipe and the connecting pipe, the end of the intake pipe away from the corresponding sleeve is an inlet, the inlet extends out of the shell, and the end of the exhaust pipe away from the inlet extends out of the shell.

[0007] The utility model is further configured as follows: a plurality of through holes are evenly opened in the radial direction on the sleeve, the diameter of the through holes is equal to that of the resistive holes, a plurality of the through holes are arranged in a one-to-one correspondence with the resistive holes, a plurality of slide grooves are symmetrically opened at both ends of the sleeve, a plurality of sliders are arranged on the corresponding intake pipe or connecting pipe, and a plurality of the sliders are slidably connected with the slide grooves.

[0008] The utility model is further configured as follows: the adjusting mechanism comprises a plurality of connecting rods 1, the plurality of connecting rods 1 are evenly arranged along the circumference of the sleeve, one end of the connecting rod 1 is rotatably mounted on the shell, a flange is provided at one end of the sleeve facing the adjusting mechanism, a plurality of connecting rods 2 are rotatably connected to the flange, an adjusting rod is threadedly connected to the shell, one end of the adjusting rod extending into the shell is rotatably connected to a plug, a plurality of push rods are evenly rotatably mounted on the plug, and the connecting rod 1, the connecting rod 2 and the other end of the push rod are rotatably connected together.

[0009] The utility model is further configured as follows: the length of the connecting rod 1 is greater than the length of the connecting rod 2, and the difference between the length of the sliding groove and the length of the sliding block is not greater than the aperture of the resistive hole.

[0010] The utility model is further configured as follows: the plug is configured as a cone, the cone tip of the plug faces the corresponding air intake pipe or connecting pipe, and the taper diameter of the plug is equal to the inner diameter of the corresponding air intake pipe or connecting pipe.

[0011] The advantages of the utility model are:

[0012] The air inlet pipe and the connecting pipe are both sleeved with a sleeve, and a number of through holes corresponding to the resistive holes are evenly opened on the sleeve. An adjusting mechanism is correspondingly installed on the shell, and a plug is rotatably connected to the adjusting rod of the adjusting mechanism. The output end of the adjusting mechanism is rotatably connected to the sleeve. When the adjusting rod is rotated, the adjusting rod moves along the axial direction of the pipeline, so that the relative position of the plug and the corresponding pipe mouth changes, thereby changing the air resistance of the pipe mouth. When the plug moves, the push rod thereon drives the connecting rod 2 to move, thereby driving the sleeve to slide on the corresponding pipe. When the sleeve slides, the relative position of the through hole and the resistive hole changes, that is, the opening of the resistive hole is changed, and the air resistance at the resistive hole is changed. The exhaust resistance can be flexibly adjusted manually according to the noise reduction and energy-saving needs in actual use, and the applicability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0014] Figure 2 For along Figure 1 The AA line section is shown;

[0015] Figure 3 for Figure 2 An enlarged view of part B is shown;

[0016] In the figure: 1. shell; 11. resonant cavity; 12. resistive cavity; 2. intake pipe; 21. slider; 3. connecting pipe; 4. exhaust pipe; 5. partition; 6. resistive hole; 7. sleeve; 71. through hole; 72. slide groove; 73. flange; 8. plug; 9. adjustment mechanism; 91. connecting rod one; 92. connecting rod two; 93. push rod; 94. adjustment rod. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0019] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0020] See also Figure 1-3 , the utility model provides the following technical solutions:

[0021] A muffler with adjustable exhaust resistance comprises a shell 1. Two partitions 5 are arranged inside the shell 1. The two partitions 5 divide the interior of the shell 1 into two resonant cavities 11 and a resistive cavity 12. The resistive cavity 12 is between the two resonant cavities 11. An intake pipe 2, a connecting pipe 3 and an exhaust pipe 4 are commonly connected to the two partitions 5. A plurality of resistive holes 6 are opened on the intake pipe 2, the connecting pipe 3 and the exhaust pipe 4. The resistive holes 6 are all arranged in the resistive cavity 12. An adjusting mechanism 9 is installed in each of the two resonant cavities 11. A sleeve 7 is connected to the output end of the adjusting mechanism 9. The adjusting mechanism 9 can adjust the opening of the resistive holes 6 on the intake pipe 2 and the connecting pipe 3 respectively through the two sleeves 7, so as to change the exhaust resistance of the muffler in the resistive cavity 12. The end of the intake pipe 2 away from the corresponding sleeve 7 is an inlet, and the inlet extends out of the shell 1. The end of the exhaust pipe 4 away from the inlet extends out of the shell 1.

[0022] A plurality of through holes 71 are evenly opened in the radial direction on the sleeve 7. The diameters of the through holes 71 and the resistive holes 6 are equal. The through holes 71 and the resistive holes 6 are arranged one-to-one. In the initial state, the through holes 71 and the resistive holes 6 correspond one-to-one. At this time, the opening of the resistive holes 6 is the largest. When the sleeve 7 slides on the corresponding pipe, the relative positions of the through holes 71 and the resistive holes 6 change, that is, the masking area of ​​the sleeve 7 on the resistive holes 6 changes, and the opening of the resistive holes 6 changes, thereby realizing the adjustment of the exhaust resistance of the resistive section;

[0023] A number of slide grooves 72 are symmetrically provided at both ends of the sleeve 7, and a number of sliders 21 are provided on the corresponding intake pipe 2 or the connecting pipe 3. The sliders 21 are slidably connected with the slide grooves 72. The difference between the length of the slide groove 72 and the length of the slider 21 is not greater than the aperture of the resistive hole 6. The slider 21 can only slide in the slide groove 72. The slide groove 72 plays a limiting role, so that the sliding distance of the sleeve 7 will not exceed the length of the diameter of the resistive hole 6, which is convenient for the user to adjust.

[0024] The adjusting mechanism 9 comprises a plurality of connecting rods 91, which are evenly arranged along the circumference of the sleeve 7, one end of which is rotatably mounted on the housing 1, a flange 73 is arranged on the end of the sleeve 7 facing the adjusting mechanism 9, and a plurality of connecting rods 92 are rotatably connected to the flange 73, an adjusting rod 94 is threadedly connected to the housing 1, one end of the adjusting rod 94 extending into the housing 1 is rotatably connected to the plug 8, a plurality of push rods 93 are evenly rotatably mounted on the plug 8, and the other ends of the connecting rods 91, the connecting rods 92 and the push rods 93 are rotatably connected together;

[0025] When the adjusting rod 94 is rotated, the adjusting rod 94 drives the plug 8 to move axially along the pipeline, and the plug 8 pulls the push rod 93 to move. The other end of the push rod 93 can only be on the rotation path of the connecting rod 1 91, thereby driving the connecting rod 2 92 and the sleeve 7 thereon to move. The length of the connecting rod 1 91 is greater than the length of the connecting rod 2 92, that is, the rotation radius of the connecting rod 1 91 is larger. When the plug 8 moves a longer distance, one end of the connecting rod 2 92 on the sleeve 7 moves a smaller distance. The adjusting mechanism 9 achieves the reduction of displacement through the connecting rod device, which is convenient for the user to make slight adjustments to the position of the sleeve 7.

[0026] The plug 8 is configured to be conical, with the tip of the plug 8 facing the corresponding intake pipe 2 or connecting pipe 3, which can reduce the impact of the airflow with the plug 8 and reduce the noise generated by the muffler itself. The taper diameter of the plug 8 is equal to the inner diameter of the corresponding intake pipe 2 or connecting pipe 3. When the adjusting rod 94 is rotated, the relative position of the plug 8 and the pipe mouth changes, thereby changing the opening of the pipe mouth, that is, changing the exhaust resistance at the pipe mouth.

[0027] Specifically, the air inlet pipe 2 and the connecting pipe 3 are both sleeved with a sleeve 7, and a number of through holes 71 corresponding to the resistive holes 6 are evenly opened on the sleeve 7. An adjusting mechanism 9 is correspondingly installed on the shell 1, and a plug 8 is rotatably connected to the adjusting rod 94 of the adjusting mechanism 9. The output end of the adjusting mechanism 9 is rotatably connected to the sleeve 7. When the adjusting rod 94 is rotated, the adjusting rod 94 moves along the axial direction of the pipeline, so that the relative position of the plug 8 and the corresponding pipe mouth changes, thereby changing the air resistance of the pipe mouth. When the plug 8 moves, the push rod 93 thereon drives the connecting rod 2 92 to move, thereby driving the sleeve 7 to slide on the corresponding pipeline. When the sleeve 7 slides, the relative position of the through hole 71 and the resistive hole 6 changes, that is, the opening of the resistive hole 6 is changed, and the air resistance at the resistive hole 6 is changed. The exhaust resistance can be flexibly adjusted manually according to the noise reduction and energy-saving requirements during actual use, and the applicability is higher.

[0028] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar opposites, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0031] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An exhaust resistance adjustable muffler, comprising a housing (1), characterized in that: Two partitions (5) are arranged inside the shell (1), and the two partitions (5) divide the inside of the shell (1) into two resonant cavities (11) and a resistive cavity (12). The resistive cavity (12) is between the two resonant cavities (11). The two partitions (5) are commonly connected to an intake pipe (2), a connecting pipe (3) and an exhaust pipe (4). The intake pipe (2), the connecting pipe (3) and the exhaust pipe (4) are each provided with a plurality of resistive holes (6). An adjustment mechanism (9) is installed inside the two resonant cavities (11). The output end of the adjustment mechanism (9) is connected to a sleeve (7). The two sleeves (7) can respectively adjust the opening of the resistive holes (6) on the intake pipe (2) and the connecting pipe (3). The end of the intake pipe (2) away from the corresponding sleeve (7) is an inlet, and the inlet extends out of the shell (1). The end of the exhaust pipe (4) away from the inlet extends out of the shell (1).

2. The exhaust resistance adjustable muffler according to claim 1, characterized in that: The sleeve (7) is evenly provided with a plurality of through holes (71) along the radial direction, the diameter of the through holes (71) is equal to that of the resistive holes (6), and the plurality of through holes (71) and the resistive holes (6) are arranged in a one-to-one correspondence, and the two ends of the sleeve (7) are symmetrically provided with a plurality of sliding grooves (72), corresponding to which a plurality of sliding blocks (21) are arranged on the intake pipe (2) or the connecting pipe (3), and the plurality of sliding blocks (21) are correspondingly slidably connected with the sliding grooves (72).

3. The exhaust resistance adjustable muffler according to claim 2, characterized in that: The adjusting mechanism (9) comprises a plurality of connecting rods (91), the plurality of connecting rods (91) being evenly arranged along the circumference of the sleeve (7), one end of the connecting rod (91) being rotatably mounted on the housing (1), the end of the sleeve (7) facing the adjusting mechanism (9) being provided with a flange (73), the flange (73) being rotatably connected to a plurality of connecting rods (92), an adjusting rod (94) being threadedly connected to the housing (1), one end of the adjusting rod (94) extending into the housing (1) being rotatably connected to a plug (8), a plurality of push rods (93) being evenly rotatably mounted on the plug (8), the other ends of the connecting rod (91), the connecting rod (92) and the push rod (93) being rotatably connected together.

4. The exhaust resistance adjustable muffler according to claim 3, characterized in that: The length of the connecting rod 1 (91) is greater than the length of the connecting rod 2 (92), and the difference between the length of the sliding groove (72) and the length of the sliding block (21) is not greater than the aperture of the resistive hole (6).

5. The exhaust resistance adjustable muffler according to claim 4, characterized in that: The plug (8) is configured to be conical, with the tip of the plug (8) facing the corresponding air intake pipe (2) or the connecting pipe (3), and the taper diameter of the plug (8) being equal to the inner diameter of the corresponding air intake pipe (2) or the connecting pipe (3).

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