CN85104467A - Muffler and manufacture method - Google Patents
Muffler and manufacture method Download PDFInfo
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- CN85104467A CN85104467A CN85104467.0A CN85104467A CN85104467A CN 85104467 A CN85104467 A CN 85104467A CN 85104467 A CN85104467 A CN 85104467A CN 85104467 A CN85104467 A CN 85104467A
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Abstract
The objective of the invention is to propose a kind of muffler and manufacture method thereof.Device comprises inlet tube and outer pipe, has some insulation boards to stretch to a housing from inlet tube and outer pipe.Outer pipe has a part of dwindling caliber at the entrance point place near it, is become with convex plug by fold, and in the end horn mouth is arranged.This caliber shrinks and has increased the area ratio of suppressor case to outer pipe, so produced favourable attenuation performance.Because being attached in the one procedure, the formation of outer pipe and the pressure of insulation board on it finish, so the manufacture method of silencing apparatus is comparatively easier than known method.
Description
The present invention is relevant to make the structure of the tubular element that sound suppressor tool parts use, and this sound suppression device is just like silencing apparatus and exhaust nozzle etc.The invention still further relates to the manufacturing of this tubular element.
Use the silencing apparatus of various different sound inhibition or attenuation part or element, have many types well known.Yet slight change on the structural type of element will make same frequency produce different interference forms with sound waves of different frequencies.Therefore,, or use the manufacture method cheaper, can bring preferably or the approaching sound inhibition effect that equates, so this skill also develops in continuation than the past owing to employing and some different assembling form of past.The present invention is exactly in this sense, obtains the status in this skill field.About this point, just review the evolution of development in the discussion hereinafter, so as to meaning of the present invention is described.
No. the 3rd, 672,464, Rowley(U. S. Patent) a kind of in shell, the have straight relative supplying tube of Jing and the silencing apparatus of output tube have been introduced.Between two pipe fittings and shell, there are some insulation boards to stretch.When upstream seeing from the downstream, output tube has one cylindrically to be shrunk to a trunnion gradually, outwards enlarges rapidly then, returns to approximately original cylindrical size.
No. the 4th, 267,899, Wagner(U. S. Patent) introduced the variation that this designing institute is done, it is opposed that supplying tube and output tube have been made inclined to one side side mutually.Wagner is at U. S. Patent the 4th, 368, done further variation again in No. 799, all added the trunnion part on supplying tube and output tube.In addition, above in each that introduce patent, all be with a cylindrical tube on partly at the constriction of output and supplying tube and trunnion.Like this, obviously in manufacture process, need a forming process, and have one a pipe fitting is pressed into the operation of another pipe fitting, and the operation of a compacting insulation board, the per pass operation all will increase a manufacture cost certainly.
The application case the 505th that Schmeichel(1983 applied at June 16, No. 424, identical with aforementioned patent, delegate and same assignee) muffler that discloses, also, the part and a trunnion part of dwindling are arranged on output tube with straight relative supplying tube and the output tube of Jing.But Schmeichel finds, make output tube dwindle part and trunnion part the time, it is favourable increasing some bypass passageways of not dwindling.Suppress effect though this output tube has been obtained the favourable sound, need to make the pipe fitting that special shape is arranged.When on silencing apparatus, using, again the insulation board punching press on pipe fitting.
The sound that the present invention can obtain present skill level suppresses effect, but its to obtain be to utilize to make simple apparatus, thereby reduced cost.
The objective of the invention is to propose a kind of apparatus that suppresses the sound, apparatus has a housing and inlet tube and outer pipe.Yet, there is one in inlet tube and the outer pipe, the constant circumference that passes through, but a fold of stretching is inwards arranged on a pipe end section, be connected with the outer turned welt of tube end.
Say that more specifically the present invention has an embodiment to be, an outer pipe is arranged, and have the expansion of on entrance point, turning up of a fold at least in diameter reduction gradually on the direction of entrance point.Outer pipe also has a porose part, can arrange along the part that fold is arranged of pipe.In addition, at outer pipe with have between the part of fold and can place an insulation board.
A kind of have a silencing apparatus of the pipe fitting of structural type as described, particularly structural type is in the inlet near outer pipe, have the unexpected sound to suppress effect, have with the skill present situation of being narrated in complicated a lot of pipe fitting near identical and even better sound rejection.The entrance point of having noticed flanging has the effect that reduces back pressure.And, there is the part of fold not only to form a trunnion that the venturi tube effect is arranged, and can keeps outer pipe that constant circumference is arranged after having done like this, thereby after forming fold part and larynx neck, the effective volume of the expansion chamber around must enlarging.So these characteristics are compiled the inhibitory action that has just improved the sound.
What identical significance was arranged is, described favourable shape can obtain by one procedure, and this operation combines the process of the one or more insulation boards of assembling on pipe fitting.Therefore, owing to reduce the inevitable corresponding considerable expense of having saved of assembling procedure.Therefore, the many advantages in the skill present situation can obtain by foolproof structural type, and this structural type is easy to make, and just produced cheap but the utensil of equal effective sound rejection is arranged.
Above-mentioned advantage of the present invention and other target will be further explained hereinafter.With reference to accompanying drawing and the briefing material that this specification proposes, can more understand the present invention.Accompanying drawing is represented the desirable embodiment of device and manufacture method, hereinafter will be with regard to the creativeness of accompanying drawing detailed explanation Apparatus and method for.
Fig. 1 represents a kind of muffler assembly of the proposition according to the present invention, and comprises that its device, figure are facing of cut-away section.
Fig. 2 represents along the cross section of 2-2 line among Fig. 1.
Fig. 3 A-3D is the view similar to Fig. 2, and expression is by the different shape of the pipe fitting that fold is arranged of the present invention's proposition.
The elevation cross-sectional view of Fig. 4 silencing apparatus device has an offset between supplying tube and output tube, the structure that the with good grounds the present invention of offset proposes.
Fig. 5 represents along the cross-sectional view of 5-5 line among Fig. 4.
Fig. 6 represents along the cross-sectional view of 6-6 line among Fig. 4.
Fig. 7 represents another embodiment, the partial cross-section that the part silencing apparatus similar to Fig. 1 looked in exhibition.
Fig. 8 is the cross-sectional view along 8-8 line among Fig. 7.
Fig. 9 makes the used one type representative instrument perspective view of silencing apparatus apparatus that the present invention proposes.
Figure 10 illustrates instrument among Fig. 9 and makes apparatus with pressure and combine the side-looking figure before the pipe fitting that compacting the present invention proposes.
Figure 11 is a figure similar to FIG. 10, does not exist together to make apparatus for pressure and be actuated to suppress pipe fitting and suppress insulation board on pipe fitting, and dashed graph represents that pipe fitting and insulation board leave the situation of pressing behind the instrument of making.
Now explain: in all these figure, identical or corresponding parts are used the identical number of marking on a map expression,,, generally represent with label 20 by the reducing pipe device that the present invention proposes specifically in Fig. 1 with regard to accompanying drawing.Silencing apparatus 22 used reducing pipes 20 are outer pipes among Fig. 1.Silencing apparatus 22 has inlet tube 24 and pipe fitting 20 directly right.Inlet tube and outer pipe 24,20 are fixed on the housing 26, have some insulation boards generally to use label 28.
As illustrated in fig. 1 and 2, pipe fitting 20 has a undergauge section or diameter shrinkage part 30, is formed by the fold 32 and 34 that tilts.Pipe 20 has turned welt 36 outside at entrance point, and is consistent with the diameter shrinkage part 30 at larynx neck 38 places.
To the right, pipe 20 has an outlet end 40 from the left side of Fig. 1.Pipe 20 has a cylindrical part 46 between outlet end 40 and diameter shrinkage part 30.A pair of mutual spaced insulation board 42 and 44 are arranged, be fixed on traditional mode on the cylindrical part 46 of pipe 20.Cylindrical part 46 has part with holes 48 between insulation board 42 and 44, form the last expansion chamber 43 that lowers sound equipment.
Inlet tube 24 has the wall 56 of an entity at its outlet end 58 places.Inlet tube 24 has a part with holes 60 at its close wall 56 places.Inlet tube 24 also has a porose part 62 in addition between insulation board 64 and 66. Insulation board 64 and 66 stretches between pipe 24 and housing 26.
In the running, the waste gas of discharge enters silencing apparatus 22 from inlet tube 24 entrance points 68.Waste gas may expand, by meshed portion 62, enter insulation board 64 and 66 and housing 66 between first damping chamber 65 in go.When exhaust when inlet tube 24 moves on, the back of expanding enters main expansion chamber 23 by meshed portion 60.Wall 56 prevents that waste gas from directly entering outer pipe 20 from inlet tube 24.Waste gas advances to outer pipe 20 from main expansion chamber 20, and may enter from outer turned welt end 36 or meshed portion 50.Outer turned welt can be accepted relatively large waste gas than with additive method, thereby helps to reduce back pressure.The larynx neck plays venturi tube and quickens flowing of waste gas, thereby waste gas is passed through meshed portion 50 suction outlet pipes 20.A final damping chamber 43 is arranged between insulation board 42,44 and housing 26, waste gas can entered before the outlet end 40, the back of expanding enters damping chamber 43 from meshed portion 48.
Main noise elimination in the muffler design or sound attenuation factor are the ratios of suppressor case cross sectional area and pipe fitting section area.The typical area ratio of load-carrying vehicle silencing apparatus is four to one, from 10 inches and five inches calculating of outer pipe diameter of diameter of the housing.Outer pipe of the present invention shape on a large portion of length has increased the ratio of its periphery to area, but also has strengthened the area ratio of housing to outer pipe through transforming.For reducing the outer pipe effective cross-sectional area and improving the basic shape that described ratio uses is the fold (seeing Fig. 3 A) that one one side is arranged, 8 fonts (seeing Fig. 3 B), cloverleaf (seeing Fig. 3 C) and pintongs shape (seeing Fig. 3 D).
Improved pipe fitting can also make the volume of main expansion chamber enlarge, and this is an advantage from giving birth to, and is significant characteristics to the decay of the sound in the end.Reducing the another one benefit of the useful area of outer pipe, is the boundary frequency that has improved silencing apparatus, is inversely proportional to because boundary frequency is a effective diameter with pipe fitting.Therefore, the effective frequency range of silencing apparatus has obtained powerful.And, because improved pipe fitting has larynx neck and increasing section gradually, just can improve the flow velocity of exhaust, there is the entrance of outer turned welt can offset back pressure.So, through the transformed pipe fitting 20 of the present invention, the advantage on many acoustics is arranged, especially, this pipe fitting can be done simple and easy and cheap transformation as described in hereinafter will having.
The another embodiment of silencing apparatus is shown in Fig. 4-6.With Fig. 1 and Fig. 2 embodiment components identical with identical figure number sign, the different persons of institute are for adding the apostrophe difference on number.Silencing apparatus 22 ' have with an inlet tube 24 ' and outer pipe 20 ' housing 26 '.Transfer tube 70 of silencing apparatus 22 ' also have.Inlet tube 24 '; Transfer tube 70 and outer pipe 20 ' with some insulation boards 28 ' be supported on housing 26 ' in.A porose part 60 of inlet tube 24 ' have ', near an end wall 56 of outlet end 58 ' located '.The part 72 that transfer tube 70 is porose.The part 50 of outer pipe 20 ' porose ' and 48 '.Silencing apparatus 22 ' expansion chamber 74,76 is arranged, 78 and 86, on insulation board 84, there is the opening (not shown) that expansion chamber 74 and 86 is communicated.Waste gas is from inlet tube 24 ' enter, and the back of expanding is by meshed portion 60 ' enter expansion chamber 74, and silencing apparatus 22 ' in pass through.Waste gas enters the inlet that turns up of the transfer tube 70 of 86 li of expansion chambers by the perforate on the insulation board 84 through expansion chamber 86; Perhaps enter the meshed portion 72 of transfer tube 70.The waste gas that transfer tube is 70 li flows through from meshed portion 72, enters expansion chamber 76, also may flow out from outlet end 88.So waste gas in either case all from outer frayed end 36 ' enter outer pipe 20 ', perhaps by meshed portion 50 ' enter.From outlet end 40 ' leave silencing apparatus 22 ' in the past, a part is at the waste gas of outer pipe 20 ' lining at whole waste gas, after passing through meshed portion 48 ' enter expansion chamber, passed through another noise elimination.
Silencing apparatus 22 ' outer pipe 20 ' the entrance point part and the outlet end of transfer tube 70 part on, the part of undergauge is arranged.The part that so just can recognize diameter reduction can be arranged on outer pipe other pipes in addition, also can be arranged on entrance point other pipe ends in addition.The contraction of caliber has cloverleaf shape as shown in Figure 5, and this shape is similar for example to Fig. 3 C's.Diameter shrinkage part can increase silencing apparatus 22 ' area ratio, and increase the actual volume of expansion chamber 76.Outer pipe 20 ' outer frayed end 36 ' as shown in Figure 6; Existing described as mentioned, play a part in silencing apparatus 22 ' middle reduction back pressure.As can be seen larynx neck 38 be outer pipe 20 ' innermost periphery.
Shown in Fig. 7 and 8, also has " the embodiment of expression silencing apparatus another kind of with label 22.At silencing apparatus 22 on the protruding lobe 90 of " in, insulation board 44 " is fixed on outer pipe 20 " diameter shrinkage part 30 ".Insulation board 44 " this allocation method, give between the round internal diameter 96 of outer pipe 20 " periphery that fold is arranged 94 and insulation board 44 ", the space 92 of an opening is provided.Like this, when waste gas feeds expansion chamber 100 from expansion chamber 98, can pass through open space 92; Perhaps enter outer turned welt 36 ", the back of expanding is by passing through the meshed portion 48 " and from outer pipe 20 ".
Propose according to the present invention, be used for one or more pipe fitting that the sound suppresses apparatus, it is novel that the processing method that is suppressed with the diameter shrinkage part of fold also belongs to.Be used to be suppressed with undergauge pipe fitting 20 instrument 102 as shown in Figure 9.Instrument 102 among Fig. 9 can be as mentioned below, is used to make the 8 font undergauges similar to Fig. 3 B, perhaps can make other structural type with similar instrument, for example the structural type among Fig. 3 A-3D.Instrument 102 has a pair of type heart 104, and for example, its shape equates with the protruding lobe of pipe fitting 20 with diameter.The type heart 104 has straight line end 106 and 108 to join at circumference joint-cutting 110 places.End 108 is in its expansion bottom, in order to form the outer frayed end 36 of pipe fitting 20.
Two center lines of the type heart 104 are determined first plane.During two blades 112 were decided on second plane, this plane was vertical with first plane, on the center line between two the type heart 104 center lines on first plane.Blade 112 has blunt sword in order to avoid pipe 20 is isolated, but can form suitable fold groove to pipe 20 when axially being pressed onto between the blade 112.Blade 112 is from the workpiece inlet end 114 of instrument 102, and is adjacent to each other gradually towards far-end 116.Their angle, the mutual distance between, and and the distance of the type heart, the inclination of the undergauge on the decision diameter shrinkage part 30.
The position of center line of the handing-over line decision instrument 102 on above-mentioned first and second planes of instrument 102.When a pipe fitting, for example manage 220(and see Figure 10) when being expressed on the instrument 102, the center heart line of the center line of instrument 102 and pipe 220 overlaps.No matter the type heart is two or more, and all with the equidistant placement of the center line of instrument 102, the plate that forms blade 112 is placed in the radial plane of tool focus line.Blade at most only part reaches in the circumference of pipe fitting 220.Utilize thisly hereinafter with the apparatus that is described in detail, pipe 220 when pushing, is just being formed diameter shrinkage part on instrument 102, its protruding lobe all has equal distance apart from the center line of instrument 102, and fold all faces toward 220 center line.
The pressing process of pipe fitting is by Figure 10 and 11 explanations.Instrument 102 is fixed on the fixed structure 124.Clamping assembly parts 126 is supporting an insulation board, as 244.Second clamping assembly parts 128 is fixed on the press structure 130.Insulation board 242 of second clamping combined support.Pipe 220 is placed between insulation board 244 and 242.Start press (not shown) and pipe 220 then in the contacting point of pipe 220 and insulation board 242, and stretch into pipe contact in 220 o'clock in the type heart 132 parts.Press further acts on then, and first insulation board and second insulation board are pressed on the pipe 220.Meanwhile, when pipe 220 was pushed the instrument 102 of sending to, blade 112 extruded fold on 230 parts, and end 236 outside turnups, as shown in figure 11.When pipe 220 is pulled to the place, end of the type heart 104, press and make the apparatus revolution, the pressure that continues is forward removed.Spring 122 is compacted when pipe 220 is forced into the end of the type heart 104, and overline elongation again shown in the dashed graph among Figure 11 then pushs out pipe 220, so that pipe 220 taking-ups from instrument 102 from the type heart 104.
Need not press shape instrument 104 to carry out similar pressing operation then, third and fourth insulation board is pressed on the inlet tube (as 24), just finished muffler as 22, then inlet tube and outer pipe, promptly 24 and 22, compress into housing, as 26.Last fixing with the silencing apparatus of finishing 22 the insulation board of end at least with welding or additive method.
Manufacture method of the present invention reduces one procedure than existing skill field at least, so its advantageous particularly part is arranged.In existing skill field, require earlier outer pipe to be made, could on pipe, suppress insulation board then.Because process using axial punch compacting outer pipe of the present invention is so pipe fitting axial advance operated pressing tool the time, can be pressed onto insulation board on the pipe simultaneously.Owing to adopt the axial punch operation, and constant circumference pipe manufacturer is simple, thereby can reduces the operation of suppressing pipe fitting and insulation board respectively.
In the narration in above, some embodiments have been discussed and have been pointed out its advantage.The structure of various embodiments and the details of effect comprise that novel manufacture method all is described herein as above.Yet these advantages and details all are the representativeness narrations that belongs to notion, thereby belong to illustrative.Therefore, as do any change, special as about shape, size is arranged and the change of aspects such as the combination of well known elements and assembling, and all expressed scope persons of general sense who belongs to the vocabulary in the accompanying Claim ought to belong to principle of the present invention.
Claims (15)
1, a kind of diameter reducing pipe that is used to have the gas blow-off system of tubular element, this tubular element has two relative ends.Above-mentioned tubular element has a part near above-mentioned end one end, and owing to the fold that inside stretching, extension is arranged dwindles caliber, above-mentioned tubular element has the horn mouth of assigning to an above-mentioned end from above-mentioned pleated portions.
2, a kind of reducing pipe that is used for gas blow-off system, its manufacture method comprises an extruding in the axial direction, insulation board is installed in the operation on the cylindrical tube-shaped element of end in opposite directions, and simultaneously on the part of one of the above-mentioned end of vicinity of above-mentioned tubular element end, add a fold, dwindling caliber, and an above-mentioned end formed horn mouth.
3, a kind of diameter reducing pipe that is used for a silencing apparatus, its manufacture method comprises a cylindrical tube, with cylindrical tube the operation of pushing on the instrument of common center line is arranged to one, the type heart that above-mentioned instrument has some ends to enlarge, the above-mentioned type heart all has identical distance with above-mentioned center line, above-mentioned instrument has a plate shape element, radial plane between cylindrical, columniformly stretch on vertically above-mentioned, above-mentioned plate shape element stretches in the circumference of above-mentioned cylindrical tube, thereby passes through the cylindrical tube that above-mentioned suppression process is made, the part of a contiguous end, the diameter reduction because a fold is arranged, and on this end, have tubaeform mouthful.
4, a kind of sound suppression device wherein has:
Form the housing of a closure member;
An inlet tube that is fixed in the above-mentioned housing enters above-mentioned housing as gas and uses;
An outer pipe that is fixed in the above-mentioned housing is discharged above-mentioned housing as gas and is used;
One of above-mentioned inlet tube and above-mentioned outer pipe, a meshed portion is arranged on it, and entrance point part and outlet end part are arranged, and one of above-mentioned end part has a fold that inwardly stretches and a horn mouth is arranged on this end, and above-mentioned horn mouth has the end portion of fold to be connected with above-mentioned.
5, a kind of silencing apparatus wherein has:
The housing that insulation board is arranged;
There is an inlet tube to be fixed in the above-mentioned housing, above-mentioned inlet tube has entrance point and outlet end, above-mentioned inlet tube and above-mentioned housing and a pair of above-mentioned insulation board form an expansion chamber, above-mentioned inlet tube has a type of tamper evidence at outlet end, with the device of outlet end upstream, make gaseous fluid lead to above-mentioned expansion chamber;
An outer pipe is fixed in the above-mentioned housing, above-mentioned outer pipe has entrance point and outlet end, above-mentioned entrance point has appearance means (Shape means) to enter the sound decay of the gaseous fluid of above-mentioned outer pipe with improvement, and reduce the space that above-mentioned outer pipe occupies, thereby increased the volume of expansion chamber, further improved the sound decay in the expansion chamber.
6, as the silencing apparatus in 5 of the claims the, and the above-mentioned appearance means of above-mentioned outer pipe comprise some interconnective part ellipses, from near the circular cross-section the above-mentioned outlet end, arrive the zone that larynx neck tee section is arranged, this zone links to each other with the horn section of the entrance point that leads to above-mentioned outer pipe.
7, as the silencing apparatus in 6 of the claims the, and the part of above-mentioned diameter reduction has a porose part.
8, as the silencing apparatus in 7 of the claims the, there is an insulation board to extend between the meshed portion of above-mentioned housing and above-mentioned diameter shrinkage part, and between above-mentioned insulation board and the above-mentioned outer pipe, between insulation board in the scope between the oval part and outer pipe, cause the space.
9, a kind of silencing apparatus wherein has:
The housing that expansion chamber is arranged;
The pipe fitting of some flow-through fluids;
The insulation board of an expansion chamber in above-mentioned shell end of some formation and the housing, above-mentioned insulation board is fixing between above-mentioned pipe fitting and above-mentioned housing, above-mentioned insulation board and above-mentioned pipe fitting are connected to each other, and flow out in order to the inlet tube of fluid in the above-mentioned housing, and are beneficial in above-mentioned housing and flow out;
At least there is one to have the device that improves sound decay in the above-mentioned pipe fitting, comprises and to improve the ratio of the periphery of an above-mentioned pipe fitting, and improve the appearance means of above-mentioned housing simultaneously the area ratio of an above-mentioned pipe fitting to area.
10, as the silencing apparatus in 9 of the claims the, and an above-mentioned pipe fitting has the periphery of basic fixed on all positions of its whole length.
11, as the silencing apparatus in 10 of the claims the, and above-mentioned appearance means are included in the inside crushed element in the above-mentioned pipe fitting, and above-mentioned crushed element stretches towards an end of an above-mentioned pipe fitting.
12, as the silencing apparatus in 11 of the claims the, and above-mentioned appearance means comprise the means that reduce back pressure.
13, as the silencing apparatus in 12 of the claims the, and the oriented horn section that turns up in end that above-mentioned back pressure reduction means are included in an above-mentioned pipe fitting.
14, as a kind of silencing apparatus in 13 of the claims the, the above-mentioned crushed element of an above-mentioned pipe fitting is before expanding as above-mentioned horn mouth, reduce cross-section area towards a larynx neck gradually from the sectional shape of a circle, above-mentioned back pressure reduction means comprise along the part that reduces the cross section gradually a porose part.
15, silencing apparatus manufacture method that following operation is arranged:
The insulation board pressure is attached on the inlet tube;
The insulation board pressure is attached on the outer pipe of entrance point, and with a fold part of adjacent entrance end is dwindled caliber simultaneously, and entrance point is made toroidal;
Above-mentioned outer pipe is pressed into a housing;
Above-mentioned inlet tube is pressed into a housing;
At least the several portions of a pair of above-mentioned insulation board and the welding of above-mentioned housing, to form the end of above-mentioned housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104467.0A CN1004644B (en) | 1985-06-11 | 1985-06-11 | Muffler apparatus and method for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104467.0A CN1004644B (en) | 1985-06-11 | 1985-06-11 | Muffler apparatus and method for making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85104467A true CN85104467A (en) | 1986-12-31 |
| CN1004644B CN1004644B (en) | 1989-06-28 |
Family
ID=4793858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85104467.0A Expired CN1004644B (en) | 1985-06-11 | 1985-06-11 | Muffler apparatus and method for making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004644B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080820C (en) * | 1996-11-07 | 2002-03-13 | 日野自动车工业株式会社 | Silencing apparatus with catalyst inside |
| WO2004111520A1 (en) * | 2003-06-19 | 2004-12-23 | Hongze Wang | Noise attenuation apparatus mounted on the liquid conducting conduits and method for using the same |
| CN100412327C (en) * | 2003-02-20 | 2008-08-20 | 吴溢隆 | Method of making silencer |
| CN110486351A (en) * | 2019-09-11 | 2019-11-22 | 襄阳元创汽车零部件实业有限公司 | A kind of 500T feeder muffler and its operating method |
| CN113482756A (en) * | 2021-08-20 | 2021-10-08 | 泰豪电源技术有限公司 | Exhaust muffler modular design method |
-
1985
- 1985-06-11 CN CN85104467.0A patent/CN1004644B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080820C (en) * | 1996-11-07 | 2002-03-13 | 日野自动车工业株式会社 | Silencing apparatus with catalyst inside |
| CN100412327C (en) * | 2003-02-20 | 2008-08-20 | 吴溢隆 | Method of making silencer |
| WO2004111520A1 (en) * | 2003-06-19 | 2004-12-23 | Hongze Wang | Noise attenuation apparatus mounted on the liquid conducting conduits and method for using the same |
| CN110486351A (en) * | 2019-09-11 | 2019-11-22 | 襄阳元创汽车零部件实业有限公司 | A kind of 500T feeder muffler and its operating method |
| CN110486351B (en) * | 2019-09-11 | 2022-04-05 | 襄阳元创汽车零部件实业有限公司 | Exhaust silencer of 500T feeder and operation method thereof |
| CN113482756A (en) * | 2021-08-20 | 2021-10-08 | 泰豪电源技术有限公司 | Exhaust muffler modular design method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1004644B (en) | 1989-06-28 |
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