Silencing assembly and gas delivery device

Abstract

The application discloses a silencing assembly and a gas conveying device. The silencing assembly comprises a mounting disc, a pipe and an exhaust pipe. The pipe and the exhaust pipe are connected to the mounting disc. The pipe comprises an outlet-side pipe located on the outlet side of the mounting disc. The outlet-side pipe is located in the exhaust pipe and is spaced from the exhaust pipe to form a space. The outlet-side pipe comprises an elbow. Since the outlet-side pipe comprises the elbow, the elbow has a flow guiding effect, can eliminate vortex loss caused by a right-angle elbow, make flow field distribution uniform and low flow resistance, and finally, is beneficial to reducing pressure loss (also referred to as pressure drop) and system disturbance.

Description

Technical Field

[0001] This application relates to gas delivery systems, and more particularly to silencing components and gas delivery devices. Background Technology

[0002] In order to meet the wide range of industrial needs, air compressors and blowers have been launched in recent years, but their noise problems have seriously affected the industrial application experience.

[0003] In related technologies, the pressure loss of noise reduction components is usually relatively large. Summary of the Invention

[0004] The purpose of this application is to disclose a noise reduction assembly and a gas delivery device. The noise reduction assembly is beneficial for reducing pressure loss.

[0005] In a first aspect, this application discloses a muffler assembly. The muffler assembly includes a mounting plate, a connector, and an exhaust pipe. Both the connector and the exhaust pipe are connected to the mounting plate. The connector includes an exhaust-side connector located on the exhaust side of the mounting plate, which is situated within the exhaust pipe and spaced apart from it to form a space. The exhaust-side connector includes a bend. Because the exhaust-side connector includes a bend...

[0006] In some embodiments, the bend includes at least one of the following features:

[0007] a) The curvature of the bend is equal to the curvature of the exhaust pipe;

[0008] b) The bending angle of the bend is a, where 45 degrees ≤ a ≤ 120 degrees;

[0009] c) The outlet-side insertion tube further includes a connecting tube, which extends in a direction perpendicular to the mounting plate, and its two ends are respectively connected to the bend and the mounting plate; or, the bend is directly connected to the outlet side of the mounting plate.

[0010] d) The bend and the exhaust pipe are both only one section and are arc-shaped.

[0011] In some embodiments, in the outlet-side insertion tube, at least the flow area of ​​the bend is not equal along the airflow direction.

[0012] In some implementations, the flow area increases linearly to achieve the inequality, or the flow area decreases linearly to achieve the inequality.

[0013] In some implementations, the flow area varies non-linearly.

[0014] In some embodiments, in the outlet-side insertion tube, at least the wall of the bend is arc-shaped, so that the at least the bend is trumpet-shaped to achieve the nonlinear change.

[0015] In some embodiments, the inlet flow area of ​​the outlet tube is s, and the outlet flow area of ​​the outlet tube is S, where 0.5≤s / S≤2.

[0016] In some embodiments, the flow area of ​​the exhaust pipe is equal along the airflow direction.

[0017] In some embodiments, the flow area of ​​the bend is equal along the airflow direction.

[0018] In some embodiments, the cannula further includes an intake-side cannula connected to the intake side of the mounting plate, the intake-side cannula extending out of the mounting plate in a direction perpendicular to the mounting plate for a length L2, where 0≤L2≤200mm.

[0019] In some embodiments, the cannula further includes an intake-side cannula connected to the intake side of the mounting plate, wherein the flow area of ​​the intake-side cannula is equal along the airflow direction.

[0020] In some embodiments, the cannula further includes an intake-side cannula connected to the intake side of the mounting plate, and the change trend of the flow area of ​​the intake-side cannula is the same as the change trend of the flow area of ​​the exhaust-side cannula.

[0021] In some embodiments, the flow area of ​​the outlet side insertion tube is a, and the flow area of ​​the exhaust pipe is A, where 0.1 ≤ a / A ≤ 0.6.

[0022] In some embodiments, the insertion tube is perpendicular to the center line of the mounting plate, which deviates from the exhaust pipe being perpendicular to the center line of the mounting plate.

[0023] In some embodiments, the centerline of the insertion tube is offset from the centerline of the exhaust pipe by a distance d, and the radius of the exhaust pipe is R, where d / R ≤ 50%.

[0024] In some embodiments, the wall of the outlet-side insertion tube is evenly distributed with sound-absorbing holes.

[0025] In some embodiments, at least a portion of the silencing holes have a diameter of f, where 0.5 mm ≤ f ≤ 5 mm.

[0026] In some embodiments, one of the insertion tubes is inserted into only one of the exhaust pipes.

[0027] Secondly, this application discloses a gas delivery device. The gas delivery device includes a main unit, the main unit includes a main unit exhaust port, and the gas delivery device further includes any of the aforementioned silencer components. A mounting plate is installed at the main unit exhaust port, and a connecting tube communicates with the main unit exhaust port. Alternatively, the gas delivery device further includes a rear-end pipeline connected to the main unit exhaust port and at least one of the aforementioned silencer components, with all silencer components connected to the rear-end pipeline. Alternatively, the gas delivery device further includes a rear-end pipeline and at least two of the aforementioned silencer components, the main unit exhaust port is connected to a mounting plate containing one of the silencer components, and the exhaust pipe is connected to a section of the rear-end pipeline; at least one of the aforementioned silencer components is connected to the rear-end pipeline.

[0028] For any of the above-mentioned noise reduction components and gas delivery devices, since the insertion tube includes a bend, the bend has a flow guiding effect, which can eliminate the eddy current loss caused by the right-angle bend, and make the flow field distribution uniform and the flow resistance low. Ultimately, it is beneficial to reduce pressure loss (also known as pressure drop) and also beneficial to reduce system disturbance. Attached Figure Description

[0029] Figure 1 This is a perspective view of a first type of noise reduction assembly shown according to an embodiment of this application;

[0030] Figure 2 yes Figure 1 A top view of the noise reduction assembly shown;

[0031] Figure 3 It is along Figure 2 A cross-sectional view along line AA;

[0032] Figure 4 yes Figure 1 A schematic diagram of the assembly consisting of the insertion tube and the mounting plate of the noise reduction component shown;

[0033] Figure 5 yes Figure 4 The front view of the assembly shown;

[0034] Figure 6 This is a cross-sectional view of a second type of noise reduction assembly shown according to an embodiment of this application;

[0035] Figure 7 yes Figure 6 A schematic diagram of the assembly consisting of the cannula and the mounting plate;

[0036] Figure 8 yes Figure 7 The front view of the assembly shown;

[0037] Figure 9This is a cross-sectional view of a third noise reduction assembly shown according to an embodiment of this application;

[0038] Figure 10 yes Figure 9 A schematic diagram of the assembly consisting of the cannula and the mounting plate;

[0039] Figure 11 yes Figure 10 The front view of the assembly shown;

[0040] Figure 12 This is a cross-sectional view of a fourth noise reduction assembly shown according to an embodiment of this application;

[0041] Figure 13 yes Figure 12 A schematic diagram of the assembly consisting of the cannula and the mounting plate;

[0042] Figure 14 yes Figure 13 The front view of the assembly shown;

[0043] Figure 15 This is a cross-sectional view of a fifth type of noise reduction assembly shown according to an embodiment of this application;

[0044] Figure 16 yes Figure 15 A schematic diagram of the assembly consisting of the cannula and the mounting plate;

[0045] Figure 17 yes Figure 16 The front view of the assembly shown;

[0046] Figure 18 This is a schematic diagram of the assembly consisting of the sixth type of cannula and the mounting plate;

[0047] Figure 19 This is a schematic diagram of the assembly consisting of the seventh type of cannula and mounting plate. Detailed Implementation

[0048] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0049] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0050] See Figures 1 to 5 This application discloses a muffler assembly 1. The muffler assembly 1 includes a mounting plate 10, a pipe 11, and an exhaust pipe 12. The mounting plate 10 is used to mount the muffler assembly 1 to a host unit 2, and its structure is not limited to a disc shape. In this way, the airflow discharged from the host unit 2's exhaust port 20 can flow into the muffler assembly 1. Furthermore, the mounting plate 10 includes an air inlet side and an air outlet side. The pipe 11 and the exhaust pipe 12 are both connected to the mounting plate 10. The installation method is not limited. For example, the pipe 11, the exhaust pipe 12, and the mounting plate 10 are connected by welding, or at least two of the pipe 11, the exhaust pipe 12, and the mounting plate 10 are connected by a connecting structure (such as a combination of bolts and flanges 120). By welding the mounting plate 10, the pipe 11, and the exhaust pipe 12, the muffler assembly 1 has fewer parts and a simpler manufacturing process. In other embodiments, a combination of welding and connecting structures can also be used to achieve the connection between the mounting plate 10, the pipe 11, and the exhaust pipe 12. The insertion tube 11 is vertically connected to the mounting plate 10. "Vertical" can be understood as the section of the insertion tube corresponding to the mounting plate 10 being perpendicular to the mounting plate 10; it is not limited to the insertion tube 11 being a straight tube. The insertion tube 11 includes an outlet-side insertion tube 111 located on the outlet side of the mounting plate 10, which is situated within the exhaust pipe 12. The outlet-side insertion tube 111 may only be connected to the outlet-side surface of the mounting plate 10, or it may be inserted into the interior of the mounting plate 10 and connected to it. Regardless of the connection method, the outlet-side insertion tube 111 and the exhaust pipe 12 are spaced apart to form a space 121. In this embodiment, the flow area of ​​the exhaust pipe 12 is uniform along the airflow direction and is a curved pipe. Of course, the structure of the exhaust pipe 12 is not limited to this. The outlet-side insertion tube 111 includes a curved pipe 1111. The bend 1111 can be a single section; when the bend 1111 has multiple sections, these bends are connected end-to-end in a wavy shape. Although Figure 9The illustration shows that when the flow area of ​​the outlet-side intubation 111 is equal everywhere, it includes a bend 1111. However, when the flow area of ​​the outlet-side intubation 111 is not equal, the outlet-side intubation 111 may include a bend 1111, that is, the bend 1111 is used to... Figure 3 The outlet side intubation tube 111 is bent into the shape of Figure 9 The state shown indicates that the flow area of ​​the bend 1111 can be equal along the airflow direction, or it can vary linearly or non-linearly as described later. Furthermore, it should be noted that although... Figure 3 , Figure 6 , Figure 12 and Figure 15 As shown in the diagram, the outlet-side inlet tube 111 is a straight tube; it only needs to be bent.

[0051] As described above, since the outlet side pipe 111 includes a bend 1111, the bend 1111 has a flow guiding function, which can eliminate the eddy current loss caused by the right-angle bend, and make the flow field distribution uniform and the flow resistance low. Ultimately, it is beneficial to reduce pressure loss (also known as pressure drop) and also beneficial to reduce system disturbance.

[0052] In some embodiments, the bend 1111 includes at least one of the following features:

[0053] a) See Figures 9 to 11 The curvature of the bend 1111 is equal to the curvature of the exhaust pipe 12. As described above, because the curvatures are equal, firstly, it facilitates the formation of a uniform annular flow channel, allowing airflow to pass smoothly; secondly, it reduces pressure loss and system energy consumption, thereby minimizing pressure loss; thirdly, the equal curvature allows a uniform annular space to be formed between the bend 1111 and the exhaust pipe 12, making the noise reduction frequency characteristics more stable. When the bend 1111 has multiple segments, the equal curvature can be understood as the curvature of the exhaust pipe 12 and the bend 1111 at the same length relative to the mounting plate 10. As an alternative to the above embodiment, when the bend 1111 has multiple segments, the curvatures of these bends 1111 can be equal or unequal.

[0054] b) See Figure 9 and Figure 11The bending angle of the bend 1111 is α, where 45 degrees ≤ a ≤ 120 degrees, for example, 45 degrees, 48 ​​degrees, 50 degrees, 53 degrees, 55 degrees, 58 degrees, 60 degrees, 62 degrees, 65 degrees, 68 degrees, 70 degrees, 73 degrees, 75 degrees, 78 degrees, 80 degrees, 83 degrees, 85 degrees, 88 degrees, 90 degrees, 92 degrees, 95 degrees, 98 degrees, 100 degrees, 103 degrees, 105 degrees, 108 degrees, 110 degrees, 113 degrees, 115 degrees, 118 degrees, or 120 degrees. In this embodiment, the curvature of the bend 1111 and the curvature of the exhaust pipe 12 may be equal or unequal. When the bend 1111 has multiple segments, the bending angles between each segment of the bend 1111 may be equal or unequal. As described above, since 45 degrees ≤ a ≤ 120 degrees, the flow field distribution is more uniform and the flow resistance is lower, which ultimately leads to less pressure loss.

[0055] c) The outlet-side insertion tube 111 further includes a connecting tube 1112, which extends in a direction perpendicular to the mounting plate 10, and its two ends are respectively connected to the bend tube 1111 and the mounting plate 10; or, the bend tube 1111 is directly connected to the outlet side of the mounting plate; in this case, the above connection method can be used regardless of the number of segments of the bend tube 1111.

[0056] d) The bend 1111 and the exhaust pipe 12 are both of a single section and are arc-shaped. As described above, since the bend 1111 and the exhaust pipe 12 are only one section, the pressure loss is small and the structure of the muffler assembly is simple.

[0057] In some embodiments of this application, the length of the exhaust-side insertion tube 111 extending beyond the mounting plate 10 is L1, where 0 < L1 ≤ 200 mm, for example, 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, or 200 mm. When the exhaust-side insertion tube 111 is a straight tube, the length L1 can be considered as the length of the exhaust-side insertion tube perpendicular to the mounting plate, for example, Figures 3 to 5 The straight pipe shown; in the case that the outlet side insertion pipe 111 is a bend, the length L1 is the overall length of the bend, for example... Figure 12 The bend shown. The structure of the outlet-side insertion tube 111 includes at least the following: 1) as shown Figures 3 to 5 As shown, the outlet-side insertion tube 111 extends from the mounting plate 10 in a direction perpendicular to the mounting plate 10, but the flow area gradually changes along the airflow direction; 2) the outlet-side insertion tube 111 is as follows Figures 6 to 8 , the air outlet side intubation 111 extends out of the mounting plate 10 in a direction perpendicular to the mounting plate 10, and the flow area is equal along the airflow direction; 3) the air outlet side intubation 111 is as Figure 12 the elbow pipe as shown, however, the flow area is equal along the airflow direction; 4) the air outlet side intubation 111 is an elbow pipe, however, the flow area is not equal along the airflow direction. When 0 < L1 ≤ 200mm, the air outlet side intubation 111 may be an intubation with a fixed length, and the length thereof cannot be adjusted. At this time, the value of the length L1 is a certain value less than or equal to 200. In other embodiments, the air outlet side intubation 111 may be an intubation with an adjustable length, and there is no limitation on the structure that achieves adjustable length. Certainly, in the case where the air outlet side intubation 111 includes an elbow pipe 1111, the length of the elbow pipe 1111 extending out of the mounting plate 10 is not within the above range.

[0058] With the above arrangement, 0 < L1 ≤ 200mm ensures that the noise elimination assembly can cover low-frequency noise and medium-high frequency noise, so that the noise elimination frequency band of the noise elimination assembly is wider and the noise elimination effect is good. In addition, the air outlet side intubation within this range enables the noise elimination assembly to further have the following advantages: 1) the structure of the noise elimination assembly can be compact, the cost is controllable, the manufacturing cost is controllable, and the structural strength is good, for example, sufficient strength under the action of airflow pulsation can be ensured; 2) the airflow resistance is relatively low; 3) the adaptability is high, and it can be matched with exhaust systems of various specifications and compressor products of different series; 4) the resonance problem of the intubation caused by the excitation frequency of the main engine can be avoided.

[0059] See Figure 3 , Figure 6 , Figure 8 , Figure 9 , Figure 11 , Figure 12 , Figure 14 , Figure 15 and Figure 17 , in some embodiments, with the airflow direction as a reference, the diameter of the cross-section of the air outlet side intubation 111 is D, 0mm < D ≤ 300mm. With respect to the change of the cross-sectional area (i.e., the flow area) of the air outlet side intubation 111 along the airflow direction, the diameter D is the minimum diameter. When the cross-sectional area of the air outlet side intubation 111 is equal everywhere along the airflow direction, the diameter D may be the diameter at any position.

[0060] With the above arrangement, under the condition of 0 < L1 ≤ 200mm, 0mm < D ≤ 300mm ensures that the flow area is relatively large, and a large flow area is beneficial to lower pressure loss. For example, in some embodiments of the present application, the pressure loss is about 0.02 bar.

[0061] In some embodiments, the flow area of ​​the outlet-side insertion tube 111 is not equal along the airflow direction. Although only in Figure 3 The illustration shows that the flow areas of the outlet-side insertion tubes 111 are not equal; however, those skilled in the art will understand that... Figure 6 , Figure 9 , Figure 12 and Figure 15 In the silencing assembly shown, the flow area of ​​the exhaust-side inlet tube 111 can also be unequal. With respect to the centerline W1 of the exhaust-side inlet tube 111 being perpendicular to the mounting plate 10, the airflow direction is perpendicular to the plane of the mounting plate 10. (See [reference]). Figure 3 , Figure 6 , Figure 12 and Figure 15 The airflow direction can be considered to be horizontal to the right; when the outlet-side insertion tube 111 includes a bend 1111, the airflow direction is the extension direction of the outlet-side insertion tube 111. Figures 9 to 11 The airflow direction is shown to be initially horizontal to the right, then downward in an arc. The inequality is not limited to the manner described below and can be achieved through a step-like abrupt change. Of course, when the outlet-side insertion tube 111 includes a bend 1111, the inequality of the flow area of ​​the outlet-side insertion tube 111 is at least reflected in the inequality of the flow area of ​​the bend 1111; that is, the features of the outlet-side insertion tube 111 described below can be directly the features of the bend 1111. Of course, the inequality of the flow area of ​​the outlet-side insertion tube 111 here can be limited to the inequality of the flow area of ​​the bend 1111, or it can be that the flow area of ​​the outlet-side insertion tube 111 as a whole is inequality along the airflow direction. In other embodiments, when the outlet-side insertion tube 111 includes a bend 1111, the flow area of ​​the bend 1111 is equal along the airflow direction, such as... Figure 9 As shown.

[0062] As described above, since the flow areas of the outlet-side intubation tubes 111 are not equal, when the airflow (or sound wave) propagates within the outlet-side intubation tubes 111, part of the sound wave will continue to propagate, while the other part of the sound wave will form acoustic impedance due to the unequal flow areas. As a result, the sound wave will be reflected towards the sound source. The reflected sound wave will oscillate and interfere with each other within the intubation tubes 11, and will either be consumed or confined within the intubation tubes 11 and unable to radiate further. Therefore, the noise reduction effect of the noise reduction component 1 is good. Furthermore, in some related technologies, the flow area of ​​the exhaust-side inlet 111 is equal along the airflow direction. This type of exhaust-side inlet 111 is also called a constant cross-section inlet. The constant cross-section inlet has limited noise reduction effect over a wide frequency band. However, compared with the constant cross-section inlet, the exhaust-side inlet 111 of this application, with its unequal flow area, has a certain reflection effect on sound waves of different frequencies at each point of cross-sectional change because the unequal flow area changes. By changing the resonant frequency of the exhaust-side inlet 111, the noise reduction band can be widened. In addition, the space 121 between the exhaust-side inlet 111 and the exhaust pipe 12 (especially when the exhaust pipe 12 is a bend with an equal flow area everywhere) is also a changing flow field, which is also conducive to good noise reduction effect and low pressure loss, and will not cause a significant reduction in the specific power of the system. The noise reduction component can be applied to occasions where pressure loss is a requirement.

[0063] See Figures 1 to 5 The flow area of ​​the outlet-side intubation tube 111 increases linearly (gradually expands) to achieve the inequality; alternatively, the flow area decreases linearly (gradually shrinks) to achieve the inequality. The linear increase or decrease can be understood as a linear change. Achieving the uniform change could be achieved, for example, by having a circular cross-section for the outlet-side intubation tube 111. However, the cross-section of the outlet-side intubation tube 111 is not limited to a circle; for example, the shape of the cross-section could be square, elliptical, etc.

[0064] As described above, since the flow area of ​​the exhaust-side pipe 111 increases linearly or decreases linearly, the acoustic impedance changes gradually, further improving the silencing effect. Furthermore, the uniform change in flow area allows for continuous sound wave reflection, facilitating wider-band silencing with a relatively short exhaust-side pipe 111. Because the flow area of ​​the exhaust-side pipe 111 increases or decreases linearly, the changes in airflow velocity and pressure are smoother, reducing eddies, acceleration, or impact losses caused by sudden changes in flow velocity. In some cases, the pressure loss of the silencing component 1 is small. Of course, when the exhaust pipe 12 is a curved pipe with a uniform flow area, the space 121 also decreases linearly or increases uniformly, resulting in low flow resistance of the silencing component and consequently, low pressure loss. This prevents a significant reduction in the system's specific power, allowing the silencing component to be used in applications where pressure loss is a concern.

[0065] In some embodiments, the flow area of ​​at least the bend 1111 in the outlet-side intubation 111 varies non-linearly, which can also be understood as the flow area of ​​the outlet-side intubation 111 not varying uniformly. There are various ways to achieve this non-linear variation. For example, the wall of the intubation 11 may vary exponentially, or the wall of at least the bend 1111 in the outlet-side intubation 111 may be arc-shaped, making the bend 1111 flared (the flared shape can be understood using the shape of a hyperbola; more specifically, the outlet-side intubation 111 may be part of the boundary line of the hyperbola's X-axis or Y-axis).

[0066] As described above, since the flow area of ​​the exhaust-side inlet pipe 111 changes non-linearly, the flow area of ​​the inlet pipe 11 can be increased or decreased according to the frequency when designing the inlet pipe 11, which helps to avoid frequency blind spots that cannot be silenced. In addition, the non-linear change in the flow area of ​​the exhaust-side inlet pipe 111 also causes the space 121 between the exhaust-side inlet pipe 111 and the exhaust pipe 12 to change non-linearly, which also helps to reduce pressure loss and prevents a significant reduction in the system's specific power. The silencing component can be applied to occasions where pressure loss is a requirement.

[0067] Regardless of whether the flow area of ​​the outlet-side intubation tube 111 changes linearly or non-linearly, the flow area at the inlet of the outlet-side intubation tube 111 is s, and the flow area at the outlet of the outlet-side intubation tube 111 is S, where 0.5 ≤ s / S ≤ 2. For example, the ratio can be 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.25, 1.28, 1.3, 1.35, 1.4, 1.43, 1.48, 1.5, 1.52, 1.55, 1.58, 1.6, 1.63, 1.65, 1.69, 1.7, 1.73, 1.75, 1.78, 1.8, 1.82, 1.85, 1.88, 1.9, 1.92, 1.95, 1.98, or 2. Of course, when the bend 1111 is connected to the mounting plate 10 via the connecting pipe 1112, the outlet of the exhaust-side pipe 111 can be considered as the opening at one end of the bend 1111, and the inlet of the exhaust-side pipe 111 is the opening where the connecting pipe 1112 connects to the mounting plate 10. When the bend 1111 is directly connected to the mounting plate 10, the inlet and outlet of the exhaust-side pipe 111 are respectively the inlet and outlet of the bend 1111.

[0068] As described above, the ratio 0.5 ≤ s / S ≤ 2 can control the degree of change in the acoustic impedance of the outlet-side insertion tube 111, and obtain a larger transmission loss peak value, thereby achieving a better noise reduction effect. Furthermore, 0.5 ≤ s / S ≤ 2 allows the pressure loss and transmission loss of the noise reduction component to be balanced. If the ratio is too large, the transmission loss is small; if the ratio is too small, the pressure loss is high. Therefore, a ratio within the above range allows for a larger transmission loss and a lower pressure loss, achieving a balance.

[0069] See Figures 3 to 5 In the first type of noise reduction assembly, the insertion tube 11 further includes an intake-side insertion tube 112 connected to the intake side of the mounting plate 10. The flow area of ​​the intake-side insertion tube 112 is equal along the airflow direction. The cross-sectional shape of the intake-side insertion tube 112 can be circular, square, etc. Of course, in Figure 6 , Figure 9 , Figure 12 , Figure 13 and Figure 15 The insertion tube 11 of each of the second to fifth muffler components shown may also include the air intake side insertion tube 112, and the flow area of ​​the air intake side insertion tube 112 is equal everywhere.

[0070] As described above, since the inlet tube 11 also includes an intake side inlet tube 112, the sound waves are first silenced by the intake side inlet tube 112 and then silenced by the exhaust side inlet tube 111, further improving the silencing effect.

[0071] As a technical solution where the flow area of ​​the intake-side inlet pipe 112 is uniformly varied, in other muffler components (such as the first to fifth muffler components), the flow area of ​​the intake-side inlet pipe 112 is variable. The changing trend of the flow area of ​​the intake-side inlet pipe 112 is the same as the changing trend of the flow area of ​​the exhaust-side inlet pipe 111. That is, if the flow area of ​​the exhaust-side inlet pipe 111 changes linearly (e.g., increases linearly), then the flow area of ​​the intake-side inlet pipe 112 also changes linearly (e.g., increases linearly). This uniform changing trend includes two methods: a) See [link to relevant documentation]. Figure 18 The flow area of ​​the entire cannula 11 is uniformly varied; b) See Figure 19 The change trends of the intake-side intubation tube 112 and the exhaust-side intubation tube 111 are both linearly increasing. However, there is an abrupt change at the intersection, which can also be understood as not being a continuous change (linear increase).

[0072] As described above, since the flow area of ​​the intake-side inlet tube 112 changes in the same direction as that of the outlet-side inlet tube 111, and both flow areas increase linearly, the sound waves continuously decelerate within the entire inlet tube 11, and a series of expansion cavities are formed within the entire inlet tube 11, resulting in good noise reduction of the silencing component. Conversely, if the flow area decreases linearly, the acoustic impedance changes uniformly throughout the entire inlet tube, resulting in good high-frequency noise reduction.

[0073] See Figure 3 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 17 When the intubation tube 11 includes an intake-side intubation tube 112, the length of the intake-side intubation tube 112 extending out of the mounting plate 10 in a direction perpendicular to the mounting plate 10 is L2, where 0 ≤ L2 ≤ 200 mm. When L2 = 0, the intubation tube 11 can also be considered to not include the intake-side intubation tube. The length of the intake-side intubation tube 112 may or may not be equal to the length of the exhaust-side intubation tube 111.

[0074] Since 0≤L2≤200mm, the length of the insertion tube is longer, the noise reduction component has a wider noise reduction bandwidth, and the noise reduction effect is better.

[0075] In some embodiments, the flow area of ​​the exhaust-side inlet pipe 111 is 'a', and the flow area of ​​the exhaust pipe 12 is 'A', where 0.1 ≤ a / A ≤ 0.6. When the cross-sectional area of ​​the exhaust-side inlet pipe 111 varies along the airflow direction, the flow area 'a' is the area of ​​the smallest cross-section. When the cross-sectional area of ​​the exhaust-side inlet pipe 111 is constant along the airflow direction, the flow area is the area of ​​any cross-section. For the intake-side inlet pipe 112, the area ratio of the intake-side inlet pipe 112 to the external flow channel can also satisfy 0.1 ≤ a / A ≤ 0.6. However, in this case, 'a' is the cross-sectional area of ​​the intake-side inlet pipe 112, and 'A' is the cross-sectional area of ​​the part where the muffler assembly is installed, such as the cross-sectional area of ​​the main unit exhaust port 20.

[0076] Since 0.1 ≤ a / A ≤ 0.6, the degree of change in the acoustic impedance of the outlet-side inlet tube 111 can be controlled, and a larger transmission loss peak value can be obtained, resulting in a good noise reduction effect. Furthermore, 0.1 ≤ a / A ≤ 0.6 allows the pressure loss and transmission loss of the noise reduction assembly to be balanced. Therefore, a ratio within the above range allows for a larger transmission loss and a lower pressure loss, achieving a balance. Of course, the noise reduction assembly also has the above-mentioned beneficial effects when the area ratio of the inlet-side inlet tube 112 to the external flow channel also meets the above range.

[0077] See Figures 9 to 11 Both the bend 1111 and the exhaust pipe 12 are arc-shaped. The exhaust side pipe 111 includes two cases: a) as... Figures 9 to 11 As shown, the outlet-side insertion tube 111 includes a connecting tube 1112, which is a straight tube perpendicular to the mounting plate 10. The bent tube 1111 is tangent to the connecting tube 1112; b) the bent tube 1111 is directly connected to the outlet side of the mounting plate. When the bent tube 1111 is arc-shaped, the flow area of ​​the bent tube 1111 can be equal or unequal along the airflow direction.

[0078] As described above, both the bend 1111 and the exhaust pipe 12 are arc-shaped. The shapes of the bend 1111 and the exhaust pipe 12 have a guiding effect, which can eliminate the eddy current loss caused by the right-angle bend, and make the flow field distribution uniform and the flow resistance low. Ultimately, this helps to reduce pressure loss (also known as pressure drop) and system disturbance.

[0079] In various embodiments of this application, when the flow area of ​​the bend 1111 and the outlet side insertion tube 111 is increased, the bend 1111 can extend the sound wave propagation path, and the variable cross-section (unequal flow area) can form local resonant cavities at different positions of the path. This is equivalent to combining "low-frequency long tube silencing" and "mid-frequency local resonance" in the same tube to form a multi-level sound wave trap, thereby achieving a better silencing effect.

[0080] See Figures 6 to 8 The insertion tube 11 is perpendicular to the center line W1 of the mounting plate 10, deviating from the exhaust pipe 12 perpendicular to the center line W2 of the mounting plate 10, except as... Figure 6 In addition to the above, Figure 7 and Figure 8 The fact that the center line of the insertion pipe 11 deviates from the center line of the mounting plate 10 can also indirectly indicate that the center line of the insertion pipe 11 deviates from the center line of the exhaust pipe 12, because the center of the mounting plate 10 is concentric with one end of the exhaust pipe 12.

[0081] As described above, since the centerline W1 deviates from the centerline W2, compared to the case where the centerline W1 does not deviate from the centerline W2, this makes it easier for the outlet side of the insertion tube 11 to be longer (for example, when the exhaust pipe 12 is arc-shaped, it is easier for the outlet side insertion tube to be longer), thereby bringing more possibilities to the acoustic design, further optimizing airflow performance, pressure loss and improving acoustic performance.

[0082] Figure 6 Although the illustration shows that the flow area of ​​the insertion tube 11 is equal everywhere, the insertion tube 11 is perpendicular to the center line of the mounting plate 10, which deviates from the center line of the exhaust pipe 12 perpendicular to the mounting plate 10. When the cross-section of the exhaust-side insertion tube 111 is not equal, the exhaust-side insertion tube 111 perpendicular to the center line of the mounting plate 10 may also deviate from the exhaust pipe 12 perpendicular to the center line of the mounting plate 10. When the exhaust-side insertion tube 111 includes a bend 1111, the exhaust-side insertion tube 111 perpendicular to the center line of the mounting plate 10 may also deviate from the exhaust pipe 12 perpendicular to the center line of the mounting plate 10. This can be addressed by adjusting... Figure 9 To understand the deviation, specifically, Figure 9 The diagram illustrates that the centerline of the exhaust side inlet pipe 111 coincides with the centerline of the exhaust pipe 12, denoted as centerline W. The deviation causes... Figure 9 The center line W in the middle can be divided into two parts.

[0083] See Figure 6 The distance d between the insertion tube 11 perpendicular to the center line W1 of the mounting plate 10 and the exhaust pipe 12 perpendicular to the center line W2 of the mounting plate 10, and the radius R of the exhaust pipe 12, where d / R ≤ 50%. In some embodiments, 5% ≤ d / R ≤ 50%.

[0084] With the above settings, since d / R ≤ 50%, the aforementioned optimization of airflow performance and pressure loss, as well as the improvement of acoustic performance, can be achieved even better.

[0085] In various embodiments of this application, when the eccentric design is combined with the unequal flow area of ​​the outlet side tube 111, the eccentricity improves the aforementioned advantages such as flow distribution, and the variable cross-section allows the airflow at different positions to generate sound waves of different frequencies. In this way, an irregular spectrum silencer can be created to avoid a single resonant frequency and suppress resonant howling.

[0086] See Figures 15 to 17 The exhaust-side insertion tube 111 has uniformly distributed silencing holes 1113 on its wall. The silencing holes 1113 can be evenly distributed on the tube wall; for example, if the exhaust-side insertion tube 111 is a straight tube, the silencing holes 1113 can be evenly distributed along the axial direction of the exhaust-side insertion tube 111, and also evenly distributed along the circumference. The diameter of each silencing hole 1113 is not limited; for example, the diameter of each silencing hole 1113 is m, where 0.5mm ≤ m ≤ 5mm.

[0087] Figures 15 to 17 Although the illustration shows the exhaust-side inlet pipe 111 as a straight pipe with a uniform flow area and the silencing hole 1113 provided thereon, those skilled in the art will understand that the silencing hole 1113 can also be provided on the pipe wall of the exhaust-side inlet pipe 111 if the flow area is not uniform. When the aforementioned inlet pipe 11 includes the bent pipe 1111, the silencing hole 1113 can also be provided on the pipe wall of the exhaust-side inlet pipe 111. When the inlet pipe 11 is perpendicular to the center line W1 of the mounting plate 10 and deviates from the exhaust pipe 12 being perpendicular to the center line W2 of the mounting plate 10, the silencing hole 1113 can also be provided on the pipe wall of the exhaust-side inlet pipe 111.

[0088] By setting the silencing hole 1113, a multi-stage throttling and pressure release mechanism is formed, which reduces the propagation of high-frequency noise and improves the silencing effect.

[0089] In various embodiments of this application, when the flow areas of the outlet side pipe including the silencer hole 1113 and the outlet side pipe 111 are not equal, the unequal flow areas (also known as variable cross-section) will lead to local flow velocity changes. The silencer hole 1113 can more efficiently disturb eddies and pressure waves at the node position of flow velocity change, and finally form a flow adaptive pressure relief / silencing system with more pressure relief in the high-speed section and less pressure relief in the low-speed section, dynamically matching the working conditions.

[0090] In various embodiments of this application, when the outlet side pipe 111 includes a bend 1111 and the bend 1111 includes the silencing hole 1113, the airflow at the bend will have a secondary flow and a separation zone. The small hole placed here can directly consume vortex energy and relieve pressure. Thus, the silencing component becomes a "bend vortex absorber", which not only weakens the noise brought by the bend, but also uses vortex energy for high-frequency absorption.

[0091] In various embodiments of this application, when the silencing assembly includes the following four features: 1) the silencing hole 1113; 2) the bend 1111; 3) the exhaust-side insertion pipe 111 is perpendicular to the center line of the mounting plate 10, deviating from the exhaust pipe 12 perpendicular to the center line of the mounting plate 10; 4) the flow area of ​​the exhaust-side insertion pipe 111 is unequal; these features work together to form an integrated insertion system of "multi-stage acoustic filtration + dynamic flow field optimization + adaptive pressure relief". Therefore, the silencing assembly has targeted silencing and flow regulation capabilities for different frequencies and operating conditions. It has unique application value in scenarios with extremely high requirements for stability and noise reduction.

[0092] See Figure 3 , Figure 6 , Figure 9 , Figure 12 and Figure 15 Each of the aforementioned insertion tubes 11 is inserted into only one of the aforementioned exhaust pipes 12. In some embodiments, the internal flow area of ​​the outlet side insertion tube 111 of the insertion tube 11 is 'a', and the flow area of ​​the exhaust pipe 12 is 'A', where 10% ≤ a / A ≤ 60%. In another embodiment, the flow area of ​​the intake side insertion tube 112 can also be 'a', and the internal flow area of ​​the connecting pipe connected to the intake side of the mounting plate 10 is 'A', where 10% ≤ a / A ≤ 60%. In other embodiments, multiple insertion tubes 11 can be inserted into one exhaust pipe 12. In this case, the 'a / A' condition can still be met, except that 'a' is the sum of the flow areas of the multiple insertion tubes. For example, the mounting plate 10 has one exhaust pipe 12 and three insertion tubes 11 inserted, and the outlet side insertion tube 111 of each insertion tube 11 is located inside the exhaust pipe 12. Regardless of how many cannulas 11 the silencing assembly 1 includes, each cannulas 11 may include any of the aforementioned features, such as the outlet side cannulas 111 of each cannulas 11 being a bend, or the flow area of ​​the outlet side cannulas 111 of each cannulas 11 being linearly increasing or linearly decreasing.

[0093] As described above, since one insertion tube 11 is inserted into only one exhaust pipe 12, compared to multiple insertion tubes 11 being inserted into one exhaust pipe 12, a larger internal flow channel (flow area) can be provided, thereby reducing pressure loss. In some cases, this application uses one insertion tube 11 to be inserted into one exhaust pipe 12, resulting in a smaller pressure loss of approximately 0.02 bar.

[0094] Secondly, this application discloses a gas delivery device. The gas delivery device includes any of the aforementioned silencer components 1 and a main unit 2. The gas delivery device is, for example, a compressor, which can be a low-pressure air compressor or a high-pressure air compressor. In other embodiments, the gas delivery device can also be a blower, a vacuum pump, etc. The main unit 2 includes a main unit exhaust port, and the mounting plate 10 is installed at the main unit exhaust port. The installation method is not limited; for example, the mounting plate 10 is welded to the main unit exhaust port of the main unit 2 for installation, or it is installed through a connecting structure, which includes, for example, bolts, mounting plate screw holes in the mounting plate 10, and main unit screw holes at the edge of the main unit exhaust port. The bolts pass through the mounting plate screw holes and the main unit screw holes to achieve the installation. The insertion tube 11 communicates with the main unit exhaust port.

[0095] The above description indicates that the muffler assembly is connected to the main unit exhaust port 20. In other embodiments, there is at least one muffler assembly, and all of the muffler assemblies are connected to a rear-end pipeline. The rear-end pipeline is a general term for the pipeline between the main unit exhaust port 20 and the customer's equipment (also known in the industry as the client). There may be more than one pipeline. Taking a scheme where one muffler assembly is connected to the rear-end pipeline as an example, the connection scheme between the muffler assembly and the rear-end pipeline is as follows: the mounting plate 10 of one muffler assembly is connected to one section of the rear-end pipeline, and the exhaust pipe of the muffler assembly is connected to another section of the rear-end pipeline. The connections of other muffler assemblies to other sections of the rear-end pipeline are the same as described above.

[0096] In some other embodiments, the muffler assembly is connected to both the main exhaust port 20 and the rear pipeline. That is, the main exhaust port 20 is connected to a mounting plate 10 of the muffler assembly, and the exhaust pipe is connected to a section of the rear pipeline; at least one muffler assembly is connected to the rear pipeline.

[0097] Based on the above embodiments, those skilled in the art will understand that the silencing component can be connected to the host exhaust port 20, and the host exhaust port can be located at any position between the client and the client, not limited to one.

[0098] As described above, since the silencing component is installed on the main unit exhaust port 20 via the mounting plate 10, and / or at least one of the silencing components is connected to the rear pipeline between the main unit exhaust port 20 and the client, the silencing component has good effect and low pressure loss, and will not cause a significant reduction in the system specific power, and can be applied to scenarios where pressure loss is required.

[0099] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A noise reduction component, characterized in that, The muffler assembly includes a mounting plate (10), an insert (11), and an exhaust pipe (12), wherein: The insertion tube (11) and the exhaust pipe (12) are both connected to the mounting plate (10). The insertion tube (11) includes an exhaust side insertion tube (111) located on the exhaust side of the mounting plate (10). The exhaust side insertion tube (111) is located inside the exhaust pipe (12) and is spaced apart from the exhaust pipe (12) to form a space (121). The exhaust side insertion tube (111) includes a bend (1111).

2. The noise reduction assembly according to claim 1, characterized in that, The bend includes at least one of the following features: a) The curvature of the bend (1111) is equal to the curvature of the exhaust pipe (12); b) The bending angle of the bend (1111) is a, 45 degrees ≤ a ≤ 120 degrees; c) The outlet-side insertion tube (111) further includes a connecting tube (1112), which extends in a direction perpendicular to the mounting plate (10), and the two ends of the connecting tube (1112) are respectively connected to the bend tube (1111) and the mounting plate (10); or, the bend tube (1111) is directly connected to the outlet side of the mounting plate; d) The bend (1111) and the exhaust pipe (12) are both only one section and are arc-shaped.

3. The noise reduction assembly according to claim 1, characterized in that, In the outlet side tube (111), at least the flow area of ​​the bend (1111) is not equal along the airflow direction.

4. The noise reduction assembly according to claim 3, characterized in that, The circulation area increases linearly to achieve the inequality, or the circulation area decreases linearly to achieve the inequality.

5. The noise reduction assembly according to claim 3, characterized in that, The flow area changes nonlinearly.

6. The noise reduction assembly according to claim 5, characterized in that, In the outlet side tube (111), at least the wall of the bend (1111) is arc-shaped, so that at least the bend (1111) is trumpet-shaped, so as to achieve the nonlinear change.

7. The noise reduction assembly according to claim 3, characterized in that, The flow area of ​​the inlet of the gas outlet side intubation tube (111) is s, and the flow area of ​​the outlet of the gas outlet side intubation tube (111) is S, where 0.5≤s / S≤2.

8. The noise reduction assembly according to claim 1, characterized in that, The flow area of ​​the exhaust pipe (12) is equal along the airflow direction, and / or the flow area of ​​the bend (1111) is equal along the airflow direction.

9. The noise reduction assembly according to any one of claims 1 to 8, characterized in that, The insertion tube (11) also includes an air intake side insertion tube (112) connected to the air intake side of the mounting plate (10). The length of the air intake side insertion tube (112) extending out of the mounting plate (10) in a direction perpendicular to the mounting plate (10) is L2, where 0≤L2≤200mm.

10. The noise reduction assembly according to any one of claims 1 to 8, characterized in that, The insertion tube (11) also includes an air intake side insertion tube (112) connected to the air intake side of the mounting plate (10), and the flow area of ​​the air intake side insertion tube (112) is equal along the airflow direction.

11. The noise reduction assembly according to any one of claims 4 to 8, characterized in that, The cannula (11) also includes an air intake side cannula (112) connected to the air intake side of the mounting plate (10), and the change trend of the flow area of ​​the air intake side cannula (112) is the same as the change trend of the flow area of ​​the air outlet side cannula (111).

12. The noise reduction assembly according to claim 1, characterized in that, The flow area of ​​the outlet side insertion tube (111) is a, and the flow area of ​​the exhaust pipe (12) is A, where 0.1≤a / A≤0.

6.

13. The noise reduction assembly according to claim 1, characterized in that, The insertion tube (11) is perpendicular to the center line of the mounting plate, while the exhaust pipe (12) is perpendicular to the center line of the mounting plate.

14. The noise reduction assembly according to claim 13, characterized in that, The distance between the centerline of the insertion tube (11) and the centerline of the exhaust pipe (12) is d, and the radius of the exhaust pipe (12) is R, where d / R ≤ 50%.

15. The noise reduction assembly according to claim 1, characterized in that, The wall of the outlet side insertion tube (111) is evenly distributed with sound-absorbing holes (1113); And / or, one of the tubes (11) is inserted into only one of the exhaust tubes (12).

16. The noise reduction assembly according to claim 15, characterized in that, When the outlet side tube (111) includes a silencer hole (1113), at least a portion of the silencer hole (1113) has a diameter of f, where 0.5 mm ≤ f ≤ 5 mm.

17. A gas conveying device, characterized in that, The gas delivery device includes a main unit (2), the main unit (2) includes a main unit exhaust port (20), the gas delivery device further includes a silencer assembly (1) according to any one of claims 1 to 16, the mounting plate (10) is mounted on the main unit exhaust port (20), and the insertion tube (11) is connected to the main unit exhaust port (20); Alternatively, the gas delivery device may further include a rear-end pipeline connected to the main exhaust port (20) and at least one silencing component (1) as described in any one of claims 1 to 16, all of which are connected to the rear-end pipeline; Alternatively, the gas delivery device may further include a rear-end pipeline and at least two muffler components as described in any one of claims 1 to 16, wherein the main exhaust port (20) is connected to a mounting plate (10) of one of the muffler components, and the exhaust pipe is connected to a section of the rear-end pipeline; at least one of the muffler components is connected to the rear-end pipeline.

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