CN220771348U - Muffler assembly - Google Patents

Abstract

The utility model discloses a silencer assembly, which comprises a silencer and a bushing, wherein the silencer comprises a silencer body, the silencer body comprises a port part, at least part of the bushing is connected with the port part in a matched mode, the bushing is provided with an opening part, the opening part comprises an opening, the opening penetrates through the end faces of two ends of the bushing along the axial direction of the bushing, and the opening penetrates through the side wall part of the bushing along the radial direction of the bushing.

Description

Muffler assembly

[ field of technology ]

The utility model relates to the field of air conditioning systems, in particular to a silencer assembly.

[ background Art ]

In order to improve the connection strength, the muffler in the air conditioning system needs to be connected with a system connecting pipe, a bushing is generally arranged for switching, in the related art, a seamless bushing is adopted for the bushing, interference fit is generally adopted when the bushing is matched with the muffler, interference is required to be limited, when the interference is large, the press fitting is difficult, a solder runner is easy to break, the solder flows difficultly, and the welding strength is influenced.

[ utility model ]

The application provides a silencer assembly easy to press fit, and the specific technical scheme is as follows:

the muffler assembly comprises a muffler body and a bushing, wherein the muffler body comprises a port part, at least part of the bushing is connected with the port part in a matched mode, the bushing comprises an opening part, the opening part comprises an opening, the opening penetrates through two end faces of the bushing along the axial direction of the bushing, the opening penetrates through the side wall part of the bushing along the radial direction of the bushing.

The muffler assembly that this application provided, beneficial effect lies in: when the bushing is pressed to the end part of the silencer, the opening provides a certain deformation space for the bushing when the bushing is radially contracted, so that the pressing resistance of the bushing can be reduced, and the pressing is easier.

[ description of the drawings ]

FIG. 1 shows a perspective view of a bushing;

FIG. 2 illustrates a front view of a bushing;

FIG. 3 shows a top view of the bushing;

FIG. 4 shows a second embodiment of a bushing;

FIG. 5 illustrates a perspective view of a muffler assembly;

FIG. 6 shows a cross-sectional view of a muffler assembly;

fig. 7 shows an enlarged view of fig. 6;

100. a muffler assembly; 10. a muffler; 1. a body; 2. a bushing; 11. an end opening part; 27. an opening portion; 271. an opening; 21. a first end face; 22. a second end face; 23. an inner wall surface; 24. an outer wall surface; 272. a first opening surface; 273. a second opening surface; 28. a body; 25. a first burring part; 26. a second burring part; 34. a guide surface; 280. a first groove; 281. a second groove; 111. a step portion;

[ detailed description ] of the utility model

The utility model is further described with reference to the drawings and the specific embodiments below:

in order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and the detailed description. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. The terms upper, lower, etc. used herein are defined with respect to the positions of the components shown in the drawings, and are for clarity and convenience in describing the embodiments only, and it should be understood that the terms upper, lower, etc. should not be construed as limiting the scope of the present application.

As shown in fig. 1 to 7, the present application provides a muffler assembly 100, which includes a muffler 10, the muffler 10 includes a muffler body 1, the muffler 10 may be made of iron, copper, aluminum, steel, etc., and hereinafter, the muffler 10 is mainly described as a steel muffler 10, the muffler 10 is made by processing a steel pipe material into a forming body 1 by a spinning method, port portions 11 for fluid inflow and fluid outflow are formed at both ends of the forming body 1 by necking processing, and step portions 111 are provided on inner wall surfaces of the port portions 11. The muffler assembly 100 further includes a bushing 2, the material of the bushing 2 may be copper, and in the process of processing the muffler assembly 100, the bushing 2 and the port 11 may be fixed by interference fit, and for connection, the connection may be further performed by welding, and the welding manner may be brazing, furnace welding, argon arc welding, laser welding, etc.

In the related art, the lining is a seamless lining, the lining and the silencer are generally in interference fit when being matched, when the excessive amount is large, the pressing is difficult, and a solder runner is easy to damage to make solder flow difficult, so that a welding seam is not full enough, the strength of the welding seam part is influenced, and the leakage rate of the welding seam is improved. In order to solve the above-described problem, the bush 2 in the present application is provided with the opening 27, the opening 27 includes the opening 271, the opening 271 penetrates both end surfaces of the bush 2 in the axial direction of the bush 2, and the opening 271 penetrates the side wall portion of the bush 2 in the radial direction of the bush 2. The opening 271 provides a certain deformation space for the liner 2 when radially contracted, and the liner 2 can be radially contracted during the process of mounting the liner 2 to the port portion 11 of the muffler 10, and after the liner 2 is mounted, the size of the opening 271 in the circumferential direction of the liner 2 is smaller than the size of the opening before the liner 2 is mounted; thus, the bushing 2 is less resistant to press-fitting during press-fitting, the press-fitting is easier, the risk of damaging the solder flow path is reduced, and the solder flow is relatively easier.

The bush 2 includes an opening 27, and the opening 27 includes a first opening surface 272 and a second opening surface 273, and a distance between the first opening surface 272 and the second opening surface 273 may be set to 0.1mm to 1mm in a circumferential direction of the bush 2. The distance between the first opening surface 272 and the second opening surface 273 is defined as the dimension of the opening 271 in the circumferential direction of the bushing 2, the dimension of the opening 271 in the circumferential direction of the bushing 2 is defined as L, the value of L is a variable, the value of L is different before and after the bushing 2 and the port portion 11 are mounted, if the value of L after the mounting is too large, molten solder flows out of the opening 271 in large amounts due to capillary phenomenon during soldering, solder leakage is easily generated, and if the value of L after the mounting is too small, solder is easily blocked, resulting in poor solder circulation.

To further illustrate the effect of the slit 271 on the press-fit resistance of the bush 2, an example will now be described: defining the dimension of the opening 271 in the circumferential direction of the bush 2 before the bush 2 is mounted as L1, the dimension of the opening 271 in the circumferential direction of the bush 2 after the bush 2 is mounted as L2 satisfies: l2 is less than L1. In the prior art, when a seamless copper bushing is adopted, the bushing 2 and the port part 11 are in interference fit, if the interference is calculated according to a fit size chain, the interference is generally 0.01-0.08 mm, the tolerance of the wire drawing outer diameter of the bushing is generally 0.04mm, the tolerance of the inner diameter of the bushing matched with the port part 11 is 0.03mm, and the minimum interference of 0.01mm is ensured; if the tolerance is reduced, the processing precision and the processing cost of the parts are greatly improved, if the fit interference is larger during welding after press fitting, the welding flux is difficult to flow, the welding seam is not full enough, the strength of the welding seam part is affected, and the leakage rate of the welding seam is improved. To solve the above problems, it is preferable that the L1 value is controlled to be in the range of 0.1 to 0.13mm before the bushing 2 is mounted, and the interference between the bushing 2 and the port portion 11 after the bushing 2 is manufactured is controlled to be in the range of 0.01 to 0.08mm, but the actual interference between the bushing 2 and the port portion 11 after the bushing 2 is manufactured is controlled to be in the range of 0 to 0.05mm due to the elasticity of the bushing 2. By setting the size of the opening 271 in this way, the welding seam is more full due to the fact that the welding seam is more favorable to the flowing of the welding flux, and the welding strength is further improved on the premise that the machining difficulty and the cost of parts are greatly improved without reducing the tolerance.

Specifically, the bushing 2 may be made of a pipe or a plate, and the material of the bushing 2 may be copper, steel, aluminum, etc., which is specifically determined according to the system connection pipe and the use environment, and at present, the material of the system connection pipe mostly adopts copper, and the corresponding material of the bushing 2 is preferably copper. The bushing 2 is a cylinder body with a cross section being approximately C-shaped and surrounding a central axis, the opening part 27 also comprises a first opening surface 272 and a second opening surface 273, two end surfaces of the bushing 2 are respectively a first end surface 21 and a second end surface 22, the first end surface 21 and the second end surface 22 are arranged at two ends of the bushing 2 and surround the central axis of the bushing 2, the first opening surface 272 is connected with the first end surface 21 and the second end surface 22, the second opening surface 273 is connected with the first end surface 21 and the second end surface 22, and the opening 271 penetrates through the first end surface 21 and the second end surface 22 along the axial direction of the bushing 2; the side wall portion of the bush 2 includes an inner wall surface 23 and an outer wall surface 24; the first opening surface 272 connects the inner wall surface 23 and the outer wall surface 24, the second opening surface 273 connects the inner wall surface 23 and the outer wall surface 24, and the opening 271 penetrates the inner wall surface 23 and the outer wall surface 24 in the radial direction of the liner 2. The opening 271 is arranged, and in the process of press fitting the bushing 2 to the port part 11 of the muffler 10, the opening 271 provides a certain deformation space for radial shrinkage of the bushing 2, and the bushing 3 can be radially shrunk, so that the press fitting resistance is smaller, and the press fitting is more convenient.

In this embodiment, it is preferable that the first opening surface 272 and the second opening surface 273 are straight surfaces extending in the axial direction of the bush 2, respectively, and the first opening surface 272 and the second opening surface 273 are disposed parallel to each other. In this way, the arrangement is convenient to process, the first opening surface 272 and the second opening surface 273 are parallel to each other, when the bush 2 is installed in the device body 1, the distance between the first opening surface 272 and the second opening surface 273 can be uniformly changed when the bush 2 is radially contracted, after the bush 2 is completely installed, the distance from any point on the first opening surface 272 to the second opening surface 273 in the circumferential direction of the bush 2 is nearly equal, thus, during welding, the solder can uniformly flow along the compressed opening 271, the possibility that the solder is blocked due to too small opening 271 or too large opening leakage is reduced, so that the welding seam is full, the strength of the welding seam part is improved, and the leakage rate of the welding seam is reduced.

Of course, the opening surfaces may also be non-straight, that is to say the first opening surface 272 and the second opening surface 273 are each a non-straight surface which does not extend straight along the axial direction of the bushing 2. The opening surface can be in various shapes such as U-shaped, wavy lines, curved arcs and the like, and only needs to satisfy: the first opening surface 272 and the second opening surface 273 are provided adjacently in the circumferential direction of the liner 2, and a deformation space for radial contraction of the liner 2 may be provided, and other shapes of opening surfaces will not be described in detail here.

The bush 2 still includes the body 28 that is the tube-shape roughly and first turn-ups portion 25, and the outer wall of at least part body 28 and the inner wall cooperation welding of port portion 11, and first turn-ups portion 25 are located port portion 11 axial outside relatively, and first turn-ups portion 25 and the terminal surface direct fit of port portion 11 carry out axial positioning to bush 2, and the scheme of setting like this, the area reduction in the outside that the welding seam exposes can slow down the speed that the welding seam is corroded relatively, further improves the welding strength of bush 2 and ware body 1. Of course, the end surfaces of the first flanging part 25 and the port part 11 can be indirectly matched through welding flux to axially position the bushing 2; specifically, the first flange portion 25 has an axial gap with the end face of the port portion 11, and can be used for placing solder, and in the welding process, the solder is melted by heating, and fills the gap, so as to fixedly connect the liner 2 with the device body 1. The engagement here refers to a relationship between the end face of the port portion 11 and the flange of the first flange portion 25, and may be a pressed state, a gap between the two, a gap in a part of the contact portion, a melted solder between the two, or the like.

The bushing 2 further comprises a second flanging part 26, the second flanging part 26 is connected with one end of the body 28 far away from the first flanging part 25, the second flanging part 26 is relatively positioned on the inner side of the body 28, the second flanging part 26 is used for axially positioning a system connecting pipe connected with the bushing 2, and the installation precision between the system connecting pipe and the bushing 2 is improved. Since the body 28 of the bush 2 of copper material is provided inside the port portion 11 of stainless steel material, if defects such as large grain size of the bobbin material occur during furnace welding, the defects may occur stress variation during operation of the muffler assembly, but the strength of the region is ensured by the bush 2, the overall strength of the muffler assembly 100 is not affected, and the system is made to operate reliably.

The end of the body 28 far away from the first flanging part 25 is provided with a guide surface 34 with a diameter gradually reduced towards the axis through necking, the outer wall of the body 28 is provided with a first groove 280 which extends along the axial direction of the body 28 through machining, the machining is preferably a wire drawing machining process, the first groove 280 is circumferentially distributed along the outer wall surface of the body 28, the arrangement is such that after the solder is melted, the solder permeates into the first groove 280 through capillary effect and completely fills into a fit gap between the body 28 and the port part 11, and the arrangement of the first groove 280 can effectively enlarge the contact area between the solder and the outer peripheral wall of the body 28 when the bushing 2 and the port part 11 are matched and welded, so that the welding strength between the bushing 2 and the silencer 10 is further improved, and preferably, the first groove 280 is uniformly circumferentially distributed on the outer peripheral wall of the body 28, so that the processing is convenient and the flow of the solder is more favorable. In order to make the solder flow smoother, the first groove 280 and the opening 271 are not communicated, preferably, the extending direction of the first groove 280 is the same as the extending direction of the opening 271, and both extend along the axial direction of the bushing 2, so that when the body 28 and the port 11 are matched and welded, the solder is melted and completely filled into the matching gap between the bushing 2 and the port 11 through the first groove 280 and the opening 271 by capillary effect, and in the scheme, the flowing direction of the solder is consistent, so that the risk of unsmooth solder flow can be relatively reduced, and the welding seam is further plump.

Still further, a second groove 281 may be disposed on a side of the first flange portion 25 near the body 28, and the first groove 280 and the second groove 281 are communicated with each other, so as to facilitate the flow of solder during soldering. The second groove 281 is formed, the solder flows into the second groove 281 through the first groove 280 after melting and flows into the second groove 281 through the capillary effect, the solder is completely filled into the fit clearance between the first flanging part 25 and the end face of the port part 11, the corrosion speed of the external environment to the welding seam of the silencer assembly is slowed down, the service life of the silencer assembly is prolonged, in addition, the arrangement can conveniently observe the circulation condition of the solder between the lining 2 and the port part 11 to judge whether the welding quality is qualified or not, relatively more space can be provided for accommodating the solder, and the risk that the solder overflows the clearance between the lining 2 and the port part 11 is further reduced. In order to make the solder flow smoother, the second groove 281 extends in the radial direction of the bush 2, the second groove 281 and the opening 271 do not communicate, and it is preferable that the second groove 281 and the opening 271 extend in the same direction; in this way, when the first flanging part 25 is welded with the end face of the port part 11 in a matched manner, the welding flux is melted and passes through the second groove 281 and the opening 271 through the capillary effect, so that the welding flux is completely filled into the fit gap between the first flanging part 25 and the end face of the port part 11, the flowing direction of the welding flux in the scheme is consistent, the risk of unsmooth welding flux can be relatively reduced, and the welding flux is further enabled to be full.

In the assembly process of the muffler assembly 100, the bush 2 is inserted into the port 11 of the muffler 10, the outer wall of the partial body 28 is matched with the inner wall of the port 11, the step 111 is provided in the port 11, the annular solder (such as a solder ring) can be preset in the port 11 of the bush 2, the solder ring is retained on the step 111, then the bush 2 is pressed into the connection bush, and a containing portion for containing the preset solder is formed between the guide surface 34 and the step 111. The assembly is placed in a furnace soldering apparatus and heated to an appropriate process temperature, the solder melts and fills the interstitial space between the body 28 and the inner wall of the port 11 by capillary effect, completing the consolidation of the liner 2 and the body 1, forming the muffler assembly 100.

After the muffler assembly and the system are welded, the end faces of the first flanging part 25 and the end opening part 11 can be in direct compression fit, the possibility that welding seams are corroded when the welding seams are exposed in the air is reduced, the integral strength of the muffler assembly cannot be affected, and the system is enabled to work more reliably.

In the above embodiment, instead of the first groove 280 and the second groove 281, a protrusion, a rib, or the like may be used, and the protrusion and the rib extend through both end surfaces of the bushing, preferably extend along the axial direction of the bushing, and the same technical effect as the extending direction of the opening may be produced.

In the above embodiment, the bushings 2 are disposed at the inlet end and the outlet end of the flow path, respectively, and it should be understood that they may be disposed only at the inlet end or the outlet end of the flow path according to actual needs, which is also within the technical scope of the present application.

It should be noted that: the above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present utility model may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present utility model are intended to be included in the scope of the claims of the present utility model.

Claims (10)

1. A muffler assembly, includes muffler (10) and bush (2), muffler (10) include ware body (1), ware body (1) include port portion (11), at least part bush (2) with port portion (11) cooperation is connected, its characterized in that: the bushing (2) comprises an opening (27), the opening (27) comprises an opening (271), the opening (271) penetrates through two end faces of the bushing (2) along the axial direction of the bushing (2), and the opening (271) penetrates through the side wall of the bushing (2) along the radial direction of the bushing (2).

2. The muffler assembly as recited in claim 1, wherein: the opening part (27) comprises a first opening surface (272) and a second opening surface (273), the first opening surface (272) and the second opening surface (273) are adjacently arranged along the circumferential direction of the bushing (2), and a space is reserved between the first opening surface (272) and the second opening surface (273).

3. The muffler assembly as recited in claim 2, wherein: the two end surfaces of the bushing (2) are respectively a first end surface (21) and a second end surface (22); the first opening surface (272) is connected with the first end surface (21) and the second end surface (22), the second opening surface (273) is connected with the first end surface (21) and the second end surface (22), and the opening (271) penetrates through the first end surface (21) and the second end surface (22) along the axial direction of the bushing (2).

4. A muffler assembly as claimed in claim 2 or 3, wherein: the bushing (2) comprises an inner wall surface (23) and an outer wall surface (24), the first opening surface (272) is connected with the inner wall surface (23) and the outer wall surface (24), the second opening surface (273) is connected with the inner wall surface (23) and the outer wall surface (24), and the opening (271) penetrates through the inner wall surface (23) and the outer wall surface (24) along the radial direction of the bushing (2).

5. The muffler assembly as recited in claim 4, wherein:

the first opening surface (272) and the second opening surface (273) are arranged in parallel; the first opening surface (272) and the second opening surface (273) are straight surfaces extending in the axial direction of the bush (2), respectively.

6. The muffler assembly as recited in claim 5, wherein: the bushing (2) comprises a body (28) and a first flanging part (25), wherein the first flanging part (25) is directly matched with the end face of the port part (11) or indirectly matched with the end face through solder;

the outer wall surface of the body (28) is provided with a plurality of first grooves (280), the first grooves (280) are circumferentially distributed along the outer wall surface of the body (28), and the first grooves (280) are not communicated with the opening (271).

7. The muffler assembly as recited in claim 6, wherein: a plurality of second grooves (281) are formed in one side, close to the body (28), of the first flanging part (25), and the second grooves (281) are not communicated with the opening (271).

8. The muffler assembly as recited in claim 7, wherein: the first groove (280) extends along the axial direction of the bushing (2); the second groove (281) extends along the radial direction of the bushing, and the second groove (281) is communicated with the first groove (280).

9. The muffler assembly as recited in any one of claims 6-8, wherein: the bushing (2) further comprises a second flanging part (26), the second flanging part (26) is connected with one end, far away from the first flanging part (25), of the body (28), and the second flanging part (26) is relatively positioned on the inner side of the body (28).

10. The muffler assembly as recited in claim 9, wherein: the inner wall of the port part (11) is provided with a step part (111), one end of the body (28) far away from the first flanging part (25) is provided with a guide surface (34), and a containing part for containing preset solder is formed between the guide surface (34) and the step part (111).