CN213870202U - Compressor exhaust pipe with necking - Google Patents

Abstract

The utility model discloses a compressor blast pipe with throat, including setting up the blast pipe on the compressor, the compressor includes frame, piston, cylinder, amortization bubble and amortization bubble end cover, the cylinder is fixed in the frame, the amortization bubble sets up in the frame, and gas gets into the amortization bubble after the compression, amortization bubble end cover is connected with the amortization bubble, is equipped with the connecting hole on the amortization bubble end cover, and during the blast pipe inserted the connecting hole, one section blast pipe diameter that inserts in the amortization bubble end cover was less than all the other partial diameters of blast pipe. The exhaust port provided with the silencing holes is connected with the silencing bubble end cover and the exhaust pipe, so that sound waves can be reflected through the sudden change cross section of the silencing holes when entering the exhaust port along with air flow, and then the sound waves are reflected back and forth in the silencing bubble end cover to consume energy, and the aim of silencing is achieved.

Description

Compressor exhaust pipe with necking

Technical Field

The utility model belongs to the technical field of the compressor technique and specifically relates to a compressor blast pipe with throat is related to.

Background

Noise has been considered one of the serious pollutions. The noise problem of the refrigeration compressor, which is used as a power source and a heart of household refrigeration equipment, is an important index for measuring the comprehensive performance of the refrigeration compressor. In fact, for a compressor, most of the noise is due to the casing being excited by some noise source (e.g. by springs, refrigerant pressure pulsations, exhaust pipes, amount of lubricating oil, etc.). However, the noise sources and transmission paths of the compressor are complex and various, which brings great difficulty to the noise elimination and noise reduction of the compressor. The main noise sources of the refrigeration compressor are composed of aerodynamic noise radiated by intake air and exhaust air, mechanical noise generated by mechanical moving parts and noise of a driving motor. The discharge noise of the compressor is caused by the pressure pulsation of the gas flow in the discharge pipe. The muffler in the hermetic compressor is generally a reactive muffler, which reflects or consumes sound energy by using a change in the cross section of a pipe and a change in acoustic impedance caused by a resonance cavity, or cancels noise in the muffler by making the phase of sound waves 180 degrees different by using a difference in acoustic path.

Because of the limited space within the compressor shell, it is common in the prior art to use a single form of reactive muffler, which is classified into two types: the muffler has one expanding chamber comprising exhaust port and inner cavity, and the other one is resonant cavity muffler with one inner cavity around the exhaust pipe. The single-form silencer is selected from the two types, and has the advantages of simple structure, high reliability, easy manufacture and undesirable silencing effect. For example, the publication "an inner exhaust pipe for a refrigeration compressor" disclosed in chinese patent document includes a cover plate, a first pipe, a first muffling bag upper cover, an air hole partition plate, a second muffling bag lower cover and a second pipe, the cover plate is connected to one end of the first pipe, the other end of the first pipe is connected to the first muffling bag upper cover, the air hole partition plate is disposed between the first muffling bag upper cover and the second muffling bag lower cover, the first muffling bag upper cover, the air hole partition plate and the second muffling bag lower cover are fixedly connected, the second muffling bag lower cover is connected to the second pipe, and the air hole partition plate is provided with an air hole to form a perforated structure for separating the first muffling bag upper cover and the second muffling bag lower cover, so that an air flow entering the muffling bag. Although the device enables the air flow to be buffered through the structure with the holes between the upper cover and the lower cover of the silencing bag, and then reduces the noise, the structure for reducing the noise through guiding the air flow has a very limited noise reduction effect. For improving the structure of making an uproar singleness of falling in the present compressor blast pipe, the unsatisfactory shortcoming of noise reduction effect, the utility model provides a compressor blast pipe with throat.

Disclosure of Invention

To the prior art who mentions among the background art in the compressor blast pipe fall make an uproar single structure of making an uproar, the unsatisfactory problem of noise reduction effect, the utility model provides a compressor blast pipe with throat links up amortization bubble end cover and blast pipe through the gas vent that the internal diameter is less than the blast pipe for the sound wave can reflect through the sudden change cross-section of bloop when following the air current and getting into gas vent and bloop, and then makes the sound wave make a round trip to reflect the energy consumption in the end cover of bloop, has reached the purpose of eliminating the noise. The utility model provides a compressor exhaust pipe subassembly compact structure, the noise reduction effect is obvious, and overall stability is good, durable.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a compressor blast pipe with throat, is including setting up the blast pipe on the compressor, the compressor includes frame, piston, cylinder, amortization bubble and amortization bubble end cover, the cylinder is fixed in the frame, the amortization bubble sets up in the frame, and gaseous gets into the amortization bubble after the compression, amortization bubble end cover is connected with the amortization bubble, is equipped with the connecting hole on the amortization bubble end cover, and the blast pipe inserts in the connecting hole, and one section blast pipe diameter that inserts in the amortization bubble end cover is less than the all the other partial diameters of blast pipe. The inner diameter of the exhaust port is smaller than that of the exhaust pipe, when sound waves enter the exhaust port along with airflow, reflection is enhanced when the section is suddenly changed, and then the sound waves are reflected back and forth in the end cover of the silencing bubble to consume energy, so that the aim of silencing is achieved.

Preferably, the exhaust pipe inserted into the silencing bubble end cover is an exhaust port which is of a cylindrical structure, and a plurality of silencing holes are formed in the side wall of the exhaust port. Because the inner diameter of the exhaust port, particularly the inner diameter of the silencing hole is obviously smaller than the air inlet of the silencing bubble end cover, when the sound wave enters the exhaust port along with the air flow, the sound wave has the characteristic of reflecting when the section suddenly changes, and then the sound wave reflects back and forth in the silencing bubble end cover to consume energy, so that the aim of silencing is achieved.

Preferably, the exhaust port is provided with a closed cavity structure and comprises an inner cylinder and an outer cylinder, and the silencing hole is a through hole structure arranged on the side wall of the outer cylinder. The cavity type exhaust port can enable the self-muffling hole to be reflected for multiple times after entering, energy consumption is achieved, and therefore the purpose of muffling is achieved. The muffling hole utilizes the reflection formed by the sound wave through the abrupt change section to reduce the sound wave energy entering the exhaust port, thereby achieving the purpose of muffling.

Preferably, the wall thickness of the outer cylinder is smaller than 1mm, and the aperture of the silencing hole is smaller than 1 mm; the h is more than 5cm, and the h is less than 20 cm. The outer cylinder with the thickness of less than 1.0mm is perforated with micropores with the pore diameter of less than or equal to 1.0mm, the perforation rate is 1-5%, an air layer with the thickness of 5-20cm is reserved at the rear part, and the air layer between the outer cylinder and the inner cylinder is not filled with any sound absorption material, so that the sound absorption structure of the micropunch plate is formed. This is a low acoustic mass, high acoustic resistance resonant sound absorbing structure. The air column at the hole neck of the silencing hole on the outer cylinder and the air in the air layer form a clamping plate sound absorption structure, when the external noise frequency and the elastic system are the same due to the frequency, the air at the hole neck of the silencing hole is caused to be strongly resonated to generate severe friction, so that sound energy is consumed, and the microporous plate sound absorption structure is particularly suitable for attenuating low-frequency noise.

Preferably, the exhaust pipe penetrates through the silencing cylinder, a silencing part is arranged on the inner wall of the silencing cylinder along the length direction of the silencing cylinder, the silencing part comprises silencing grooves and silencing channels arranged between the silencing grooves, and the silencing channels are communicated with adjacent silencing grooves. The silencing bubble end cover is used for being connected with a compressor shell, the exhaust pipe is arranged at the tail of the silencing bubble end cover, and the exhaust pipe and the silencing bubble end cover are of an integrated structure. The silencing barrel is used as a main silencing part, sound waves sequentially pass through the silencing groove and the silencing channel which are arranged along the length direction of the silencing barrel by utilizing the silencing part and are reflected for multiple times at the abrupt change position of the section, so that the sound energy radiated outwards by the silencing barrel is reduced, the aim of silencing is fulfilled, and the noise reduction effect is obvious.

Preferably, the silencing groove is of a conical structure, the small end of the silencing groove is arranged on the inner wall of the silencing barrel, and the large end of the silencing groove is arranged inside the barrel wall of the silencing barrel. When sound waves are transmitted in the silencing barrel, the sound waves enter the silencing groove from the small end of the first silencing groove with the conical structure, the sudden change of the section between the small end and the inner wall of the silencing barrel can be fully utilized, the reflectivity of the sound waves when entering the silencing groove is improved as much as possible, after the sound waves enter the silencing groove, the sound waves are reflected for many times on the side wall and the large end of the conical groove to further consume energy, then enter the sound blocking channel with the small caliber, and are reflected again by the sudden change of the section to consume the energy. When the sound wave enters the adjacent silencing groove from the sound-blocking channel and is reflected for many times in the silencing groove, the energy is obviously consumed when the sound wave returns to the silencing barrel from the small end of the silencing groove.

Preferably, the sound-deadening portion includes a plurality of sound-deadening segments, and the sound-deadening segments are spaced at uniform intervals. The silencing sections are uniformly arranged in the silencing barrel, so that sound waves carried by air flow penetrating into the silencing barrel from the end cover of the silencing bubble fully contact the silencing sections, impedance of the sound in the transmission process is utilized to the maximum extent for reflection, energy is consumed, and the silencing effect is effectively improved.

Preferably, the silencing bubble end cover is of a hemispherical structure, a sound absorption groove is formed in the inner wall of the silencing bubble end cover, and a sound absorption layer material is arranged in the sound absorption groove. The sound absorbing layer material is porous sound absorbing material, relies on inside a large amount of, link up each other, outwards open micropore to absorb the sound wave, and the sound wave rubs in porous material's hole and converts into thermal energy consumption and dispels, makes the sound wave through amortization bubble end cover weaken, and this kind of resistive noise reduction structure can tentatively weaken the sound wave, but resistive noise reduction structure well to the high frequency noise elimination, to the low frequency noise elimination effect relatively poor.

Therefore, the utility model discloses following beneficial effect has: (1) the silencing part is utilized to enable sound waves to sequentially pass through the silencing groove and the silencing channel which are arranged along the length direction of the silencing barrel, and multiple reflections are carried out at the abrupt change position of the section, so that the sound energy radiated outwards by the silencing barrel is reduced, the silencing purpose is achieved, and the noise reduction effect is obvious; (2) the sound absorption layer on the end cover of the silencing foam is made of porous sound absorption material, sound waves are absorbed by virtue of a large number of micropores which are internally communicated and are opened outwards, and the resistive silencing structure can preliminarily weaken the sound waves; (3) a plurality of sound-deadening holes arranged on the side wall of the exhaust port reflect sound waves through abrupt sections, so that the energy of the sound waves entering the exhaust port is reduced; (4) the sound absorption structure of the micro-perforated plate, which is formed by the inner cylinder and the outer cylinder of the exhaust port, fully consumes noise and sound energy, and further improves the integral noise elimination effect of the compressor component; (5) the utility model discloses a compressor exhaust pipe subassembly compact structure, the noise reduction effect is obvious, and overall stability is good, durable.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view taken at a-a in fig. 1.

Fig. 3 is an enlarged view at B in fig. 2.

In the figure: 1. the air-conditioning sound-absorbing structure comprises a sound-absorbing foam end cover 11, a sound-absorbing layer material 2, an exhaust pipe 3, a sound-absorbing cylinder 4, a sound-absorbing part 41, a sound-absorbing groove 42, a sound-absorbing channel 5, an exhaust port 51, an inner cylinder 52, an outer cylinder 6, a sound-absorbing hole 7 and an air layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; 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.

Examples

As shown in fig. 1 and 2, the compressor comprises a frame, a piston, a cylinder, a silencing bubble end cover 1 and an exhaust pipe 2, wherein the cylinder is fixed on the frame, the silencing bubble is arranged on the frame, gas enters the silencing bubble after being compressed, the silencing bubble end cover 1 is connected with the silencing bubble, a connecting hole is formed in the silencing bubble end cover 1, the exhaust pipe 2 is inserted into the connecting hole, and the diameter of one section of the exhaust pipe 2 inserted into the silencing bubble end cover 1 is smaller than the diameter of the rest parts of the exhaust pipe 2. The inner diameter of the exhaust port is smaller than that of the exhaust pipe, when sound waves enter the exhaust port along with airflow, reflection is enhanced when the section is suddenly changed, and then the sound waves are reflected back and forth in the end cover of the silencing bubble to consume energy, so that the aim of silencing is achieved.

One section of exhaust pipe 2 inserted into the silencing bubble end cover 1 is an exhaust port 5, the exhaust port 5 is of a cylindrical structure, and a plurality of silencing holes 6 are formed in the side wall of the exhaust port 5. The sound deadening hole 6 utilizes the reflection formed by the sound wave through the abrupt change section to reduce the sound wave energy entering the exhaust port 5, thereby achieving the purpose of sound deadening.

The exhaust port 5 is provided with a closed cavity structure which comprises an inner cylinder 51 and an outer cylinder 52, and the muffling hole 6 is a through hole structure arranged on the side wall of the outer cylinder 52. The cavity type exhaust port 5 can enable the air to be reflected for multiple times after entering from the silencing hole 6, energy consumption is achieved, and therefore the purpose of silencing is achieved.

The wall thickness of the outer cylinder 52 is less than 1mm, and the aperture of the silencing hole 6 is less than 1 mm; in this embodiment, the exhaust port 5 is made of stainless steel, and has high strength even when the wall thickness is thin. h is more than 5cm, and h is less than 20 cm. In the embodiment, h is selected to be 8cm in consideration of the limited size of the end cover 1 of the sound attenuation bubble. The outer cylinder 52 with the thickness less than 1.0mm is perforated with micropores with the aperture less than or equal to 1.0mm, the perforation rate is 1-5%, the rear part is provided with an air layer 7 with the thickness of 5-20cm, and the air layer 7 between the outer cylinder 52 and the inner cylinder 51 is not filled with any sound absorption material, thus forming the sound absorption structure of the micropunch plate. The micro-perforated plate sound absorption structure is a resonance sound absorption structure with low sound quality and high sound resistance. The air column at the hole neck of the silencing hole 6 on the outer cylinder 52 and the air in the air layer 7 form a microporous clamping plate sound absorption structure, when the external noise frequency is the same as the elastic system frequency, the air at the hole neck of the silencing hole 6 is caused to strongly resonate, and violent friction is generated, so that sound energy is consumed, and the microporous plate sound absorption structure is particularly suitable for attenuating low-frequency noise.

The exhaust pipe 2 is arranged in the silencing pot 3 in a penetrating way, the silencing part 4 is arranged on the inner wall of the silencing pot 3 along the length direction of the silencing pot 3, the silencing part 4 comprises silencing grooves 41 and silencing passages 42 arranged between the silencing grooves 41, and the silencing passages 42 are communicated with the adjacent silencing grooves 41. Amortization bubble end cover 1 is used for connecting compressor housing, and exhaust pipe 2 sets up at amortization bubble end cover 1 afterbody, and exhaust pipe 2 and amortization bubble end cover 1 formula structure as an organic whole. The silencing barrel 3 is used as a main silencing part, sound waves sequentially pass through a silencing groove 41 and a silencing channel 42 which are arranged along the length direction of the silencing barrel 3 by utilizing the silencing part 4, and are reflected for multiple times at the sudden change position of the section, so that the sound energy radiated outwards by the silencing barrel 3 is reduced, the silencing purpose is achieved, and the noise reduction effect is obvious.

As shown in fig. 3, the silencing groove 41 has a tapered structure, the small end of the silencing groove 41 is disposed on the inner wall of the silencing pot 3, and the large end of the silencing groove 41 is disposed inside the wall of the silencing pot 3. When the sound wave propagates in the silencing barrel 3, the sound wave enters the silencing groove 41 from the small end of the first silencing groove 41 with the conical structure, the sudden change of the section between the small end and the inner wall of the silencing barrel 3 can be fully utilized, the reflectivity of the sound wave when the sound wave enters the silencing groove 41 is improved as much as possible, after the sound wave enters the silencing groove 41, the sound wave is reflected for multiple times at the side wall and the large end of the conical groove to further consume energy, then enters the small-caliber sound blocking channel 42, and the sudden change of the section is utilized again to reflect and consume energy. When the sound wave enters the adjacent silencing groove 41 from the sound-blocking passage 42 and is reflected in the silencing groove 41 for a plurality of times, the energy is consumed remarkably when it returns to the silencing pot 3 from the small end of the silencing groove 41.

The muffling portion 4 comprises a plurality of muffling segments, and adjacent muffling segments are uniformly spaced. The silencing sections of the silencing parts 4 are uniformly arranged in the silencing barrel, so that sound waves carried by air flow penetrating into the silencing barrel from the silencing bubble end cover 1 fully contact the silencing sections, impedance of the sound in the transmission process is utilized to the maximum extent for reflection, energy is consumed, and the silencing effect is effectively improved.

The silencing bubble end cover 1 is of a hemispherical structure, a sound absorption groove is formed in the inner wall of the silencing bubble end cover 1, and a sound absorption layer material 11 is arranged in the sound absorption groove. The sound absorption layer material 11 is a porous sound absorption material, and absorbs sound waves by virtue of a large number of internal micropores which are mutually communicated and are opened outwards, the sound waves are rubbed in the pores of the porous material and are converted into heat energy to be dissipated, so that the sound waves passing through the silencing bubble end cover 1 are weakened, the resistive silencing structure can preliminarily weaken the sound waves, but the resistive silencing structure has good middle-high frequency silencing effect and poor low-frequency silencing effect. In this embodiment, the sound absorption layer material 11 is made of fiber material such as glass wool, which is low in cost and ideal in noise reduction effect.

The utility model discloses an operating condition as follows: when the air flow is transmitted into the exhaust pipe 2 component from the compressor, firstly the air flow reaches the silencing bubble end cover 1, the sound wave accompanying the air flow enters the exhaust port 5 and the silencing hole 6 on the side wall of the outer cylinder 52, the sound wave is reflected by the abrupt change section in the process and then enters the sound absorption layer material 11 on the inner wall of the silencing bubble end cover 1 to be fully absorbed and consumed, the sound wave entering the exhaust port 5 enters the silencing cylinder 3 along the exhaust pipe 2 and enters the silencing groove 41 in the silencing part 4, and the reactive silencing is realized by the abrupt change of the section. The sound absorption layer material 11 is used as a resistive noise elimination structure, and has good noise elimination effect on medium and high frequencies and poor noise elimination effect on low frequencies; the sound absorption structure of the micropore clamping plate on the exhaust port 5 and the multistage muffling part in the muffling cylinder are both resistant muffling structures, and are suitable for eliminating middle and low frequency noise. The resistance noise elimination structure and the resistance noise elimination structure are combined to obtain an impedance composite noise elimination structure, so that noise elimination of the compressor exhaust assembly is realized.

In addition to the above embodiments, the technical features of the present invention can be re-selected and combined within the scope of the present invention as disclosed in the claims and the specification to constitute new embodiments, which can be realized by those skilled in the art without any creative work, therefore, the embodiments of the present invention not described in detail should be considered as the specific embodiments of the present invention 52 and be within the protection scope of the present invention.

Claims (8)

1. The utility model provides a compressor blast pipe with throat, is including setting up blast pipe (2) on the compressor, the compressor includes frame, piston, cylinder, amortization bubble and amortization bubble end cover (1), the cylinder is fixed in the frame, its characterized in that, the amortization bubble sets up in the frame, and gas gets into the amortization bubble after the compression, amortization bubble end cover (1) is connected with the amortization bubble, is equipped with the connecting hole on amortization bubble end cover (1), and blast pipe (2) insert in the connecting hole, and one section blast pipe (2) diameter that inserts in amortization bubble end cover (1) is less than blast pipe (2) all the other part diameters.

2. The exhaust pipe with the necking for the compressor as claimed in claim 1, wherein the exhaust pipe section (2) inserted into the end cap (1) of the silencing bulb is an exhaust port (5), the exhaust port (5) is of a cylindrical structure, and a plurality of silencing holes (6) are arranged on the side wall of the exhaust port (5).

3. The exhaust pipe of the compressor with the necking in claim 2, wherein the exhaust port (5) is provided with a closed cavity structure, the exhaust port (5) comprises an inner cylinder (51) and an outer cylinder (52), and the muffling hole (6) is a through hole structure arranged on the side wall of the outer cylinder (52).

4. A compressor discharge pipe having a neck-in according to claim 3 wherein said outer barrel (52) has a wall thickness of less than 1 mm; the distance between the outer wall of the inner barrel (51) and the inner wall of the outer barrel (52) is h, wherein h is larger than 5cm and smaller than 20 cm.

5. The compressor discharge pipe with the necking structure according to any one of claims 1 to 4, wherein the discharge pipe (2) is penetratingly disposed at the silencing pot (3), a silencing part (4) is disposed on an inner wall of the silencing pot (3) along a length direction of the silencing pot (3), the silencing part (4) comprises silencing grooves (41) and silencing passages (42) disposed between the silencing grooves (41), and the silencing passages (42) communicate with adjacent silencing grooves (41).

6. The compressor discharge pipe with the necking according to claim 5, wherein the silencing groove (41) is of a conical structure, the small end of the silencing groove (41) is arranged on the inner wall of the silencing barrel (3), and the large end of the silencing groove (41) is arranged inside the barrel wall of the silencing barrel (3).

7. Compressor discharge pipe with a throat according to claim 5, characterised in that said muffling portion (4) comprises a plurality of muffling segments, adjacent ones of which are uniformly spaced.

8. The exhaust pipe with the necking for the compressor as claimed in claim 5, wherein the end cap (1) of the sound attenuation bubble is of a hemispherical structure, the inner wall of the end cap (1) of the sound attenuation bubble is provided with a sound absorption groove, and the sound absorption groove is internally provided with a sound absorption layer material (11).

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