CN201090277Y - Swinging vent pipe construction of double-expansion space - Google Patents

Abstract

The utility model provides a structure of a rotary exhaust tube with double-expansion space, comprising a clapboard, at least one rotary gas inlet tube, at least one exhaust tube fixed on the clapboard and a muffle tube; the rotary gas inlet tube is fixed on the clapboard; the gas inlet end and the outlet end of the rotary gas inlet tube are at the same end of the clapboard; the opening direction of the gas-inlet end of the exhaust tube is same as that of the gas inlet end and the outlet end of the rotary gas inlet tube; the clapboard is fixed inside the muffle tube to separate the internal space of the muffle tube into a first expansion space and a second expansion space; the capacity of the first expansion space is less than that of the second expansion space; the outlet end of the rotary gas inlet tube and the gas inlet end of the exhaust tube are arranged inside the first expansion space. The design of the utility model enables muffle and back-pressure control functions of the exhaust tube.

Description

The rotary type outlet pipe structure of two expansion spaces

Technical field

The utility model relates to the exhaust pipe structure of vapour, locomotive.

Background technique

A kind of existing exhaust pipe structure as shown in Figure 1, is to cook up first, second, third expansion chamber 13,14,15 in the inside of a urceolus 10 with two dividing plates 11, is provided with acoustical cotton 16 in second expansion chamber 14; One suction tude 17 is located in first, second expansion chamber 13,14, and its outlet end 172 is positioned at the 3rd expansion chamber 15; One discharge pipe 18 is located in second, third expansion chamber 14,15, and its inlet end 182 is positioned at described first expansion chamber 13, and outlet end 183 passes urceolus 10 via the 3rd expansion chamber 15.Other has makes first to communicate with the 3rd expansion chamber 13,15 connecting tube 19 that is located at second expansion chamber 14.

The flow direction of engine exhaust is represented with the arrow in scheming.Waste gas is entered by suction tude 17, and is disposed in the 3rd expansion chamber 15 by its outlet end 172.Waste gas in the 3rd expansion chamber 15 entered in first expansion chamber 13 via described connecting tube 19.Waste gas in first expansion chamber 13 drains into urceolus 10 outsides via described discharge pipe 18 again.

When the outlet pipe of this pattern is made because dividing plate more than 11, so need through multiple welding process, the manufacture cost height, and originally be to wish to rely on the design of many expansion chambers to reach preferable erasure effect, but in fact the bad noise that produces on the contrary of waste gas route also has the unsettled situation of back pressure simultaneously.When for example the waste gas waste gas of rushing in the 3rd expansion chamber 15 and the 3rd expansion chamber 15 from the outlet end 172 of suction tude 17 is rushed in first expansion chamber 13 by connecting tube 19, can directly impact the inwall of urceolus 10, so that the noise that metalloid rubs takes place in urceolus 10.And because the cause of back blast barrel, so the air-flow confusion of the first and the 3rd expansion chamber 13,15 causes exhaust to have some setbacks, back pressure is also unstable.

Summary of the invention

The main purpose of this case is at the exhaust pipe structure that proposes a kind of may command exhaust back pressure and gain erasure effect.

For achieving the above object, the technical solution adopted in the utility model is:

The rotary type outlet pipe structure of a kind of pair of expansion space is characterized in that, comprising:

One dividing plate (31); At least one revolution suction tude (32) is fixed on the described dividing plate (31), and its inlet end (321) and outlet end (322) are positioned at the same side of described dividing plate (31); At least one discharge pipe (33) is fixed on the described dividing plate (31), and its inlet end (331) is equidirectional with the inlet end (321) of above-mentioned revolution suction tude (32) with outlet end (322); One hush pipe (20), aforementioned barriers (31) is fixed in the described hush pipe (20), described hush pipe (20) inner space is separated into one first expansion space (21) and second expansion space (22), and the volume of first expansion space (21) is less than described second expansion space (22), the outlet end (322) of described revolution suction tude (32), and the inlet end (331) of described discharge pipe (33) is positioned at described first expansion space (21).

Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be:

1. the above-mentioned design of this case makes the outlet pipe structure have the effect of noise reduction and back pressure control.

2. about the silencing function of this case, its be revolution suction tude with single rotary path the flow path of waste gas in hush pipe prolonged and flow guide smooth and easy, and rely on the effect of noise reduction cotton, make waste gas obtain sound deadening in second expansion space.Waste gas is released into described first expansion space via the outlet end of described revolution suction tude again, again by described discharged to external environment condition.Because described discharge pipe is in second expansion space, so waste gas is subjected to the sound deadening of described noise reduction cotton equally when discharge pipe flows.

3. the volume waste gas that runs up of engine is disengaged to described first expansion space by described revolution suction tude, and when its pressure is increased, the waste gas of the first expansion space some can be by described dividing plate bloop and flow to second expansion space, avoid first expansion space to produce too high air pressure with this and cause high noisy or back pressure excessive.

4. this case reaches the purpose of control exhaust back pressure by means of the crow flight distance of the inlet end bore of setting described discharge pipe and the described relatively hush pipe tube of inlet end inwall.

5. but this case is flowed in hush pipe smoothly because of the revolution suction tude exhaust gas routing of single rotary path, and the smooth and easy exhaust back pressure that makes of exhaust is stable.

Description of drawings

Fig. 1 is the generalized section of existing many expansion chambers outlet pipe.

Fig. 2 is the stereo appearance figure of this case outlet pipe.

Fig. 3 is the planimetric map that straight formula is implemented for this case outlet pipe.

Fig. 4 is the schematic representation that waste gas flows in this case outlet pipe.

Fig. 5 adds the enforcement illustration of a comb again for this case outlet pipe.

Fig. 6 is the schematic representation that horizontal type is implemented for this case outlet pipe.

Fig. 7 is another embodiment's planimetric map of this case outlet pipe.

Fig. 8 is this case outlet pipe embodiment's planimetric map again.

Embodiment

This case outlet pipe structure comprises a hush pipe 20 and an outlet pipe unit 30.The main mode of execution of described outlet pipe unit 30 such as Fig. 2, shown in Figure 3, be on a dividing plate 31, to weld fixedly single-revolution suction tude 32, the pipe shaft of described revolution suction tude 32 is single revolution kenels, and its inlet end 321 is positioned at described dividing plate 31 the same sides with outlet end 322.One discharge pipe 33 is weldingly fixed on the described dividing plate 31 with pipe end, and described discharge pipe 33 is to be straight pipe type, and two ends are respectively inlet end 331 and outlet end 332.The inlet end 331 of described discharge pipe 33 is that the inlet end 321 with above-mentioned revolution suction tude 32 is same direction with outlet end 322.Described dividing plate 31 and revolution suction tude 32 are provided with bloop 311,323.

Described outlet pipe unit 30 is to be weldingly fixed in the described hush pipe 20 with described dividing plate 31, described dividing plate 31 separates into first expansion space 21 and second expansion space 22 with described hush pipe 20 inner spaces, and the volume of first expansion space 21 is less than second expansion space 22.Be provided with noise reduction cotton 23 in described second expansion space 22.The inlet end 321 of above-mentioned revolution suction tude 32 relies on an air inlet tube 40 that extends and receives the waste gas that the engine running is produced outside hush pipe 20.332 of the outlet end of above-mentioned discharge pipe 33 connect a tailpipe 50, so that exhaust gases into hush pipe 20 outsides.

The flow direction of engine exhaust is represented with arrow in Fig. 4.Waste gas enters in the described revolution suction tude 32 via air inlet tube 40, behind the single rotary path of passing through, is disengaged to first expansion space 21 by the outlet end 322 of described revolution suction tude 32; Waste gas in described first expansion space 21 is then entered by the inlet end 331 of described discharge pipe 33, is disengaged to tailpipe 50 by the outlet end 332 of described discharge pipe 33 to be disposed to external environment condition.

The above-mentioned design of this case makes outlet pipe structure have the may command exhaust back pressure, exhaust-gas flow is smooth and easy and the effect of gain noise reduction.

About the silencing function of this case, it is that revolution suction tude 32 with single rotary path prolongs the flow path of waste gas in hush pipe 20, and relies on the effect of bloop 323 and noise reduction cotton 23, makes waste gas carry out preliminary noise reduction in second expansion space 22.Waste gas is released into described first expansion space 21 via the outlet end 322 of described revolution suction tude 32.Waste gas in described first expansion space 21 is then entered by the inlet end 331 of described discharge pipe 33, is disengaged to tailpipe 50 by the outlet end 332 of described discharge pipe 33 to be disposed to external environment condition.Because described discharge pipe 33 is in second expansion space 22, so waste gas is subjected to the sound deadening of described noise reduction cotton 23 equally when discharge pipe 33 flows, and just outwards disengages via described tailpipe 50 afterwards.So waste gas enters in this case outlet pipe, no matter be the sound absorption that all can obtain noise reduction cotton 23 in revolution suction tude 32 or discharge pipe 33, so exhaust noise is very little.

If the volume waste gas that engine runs up is disengaged to described first expansion space 21 by described revolution suction tude 32, and when its pressure is increased, the waste gas of first expansion space, 21 somes can flow to second expansion space 22 by the bloop 311 of described dividing plate 31, the pressure that utilizes the effect of described noise reduction cotton 23 to carry out noise reduction and subdue first expansion space 21, and the waste gas of second expansion space 22 can be entered in the described revolution suction tude 32 by bloop 323, disengage again to first expansion space 21, therefore first expansion space 21 is to have one to dredge the pressure pipe road, avoids first expansion space 21 to produce too high air pressure with this and causes high noisy or back pressure excessive.

About the back pressure control function of this case, it mainly is to be decided by the crow flight distance of inlet end 331 bores of described discharge pipe 33 and inlet end 331 relative hush pipe 20 barrels.For example, dwindle described inlet end 331 bores, can make the pressure of discharge pipe 33 inlet ends become big, the gas emission of first expansion space 21 in the unit time diminishes, so that the pressure of first expansion space 21 becomes big, therefore outlet end 322 pressure of described revolution suction tude 32 with increase, gas emission in unit time diminishes, effect all linked with one another raises the back pressure of outlet pipe structure, engine torque output when being applicable to the slow-speed of revolution.Anti-, enlarge described discharge pipe 33 inlet ends 331 bores, then can reduce back pressure, accelerating engine waste gas is got rid of when being applicable to high rotating speed, promotes the engine operational paradigm.Again for example, the crow flight distance of inlet end 331 relative hush pipe 20 barrels is shorter, and the pressure of described discharge pipe 33 inlet ends 331 is bigger, and the relative back pressure that makes the outlet pipe structure raises.

But this case is flowed in hush pipe 20 smoothly because of revolution suction tude 32 exhaust gas routings of single rotary path, and the problem of sinuous flow and flow-disturbing reduces, and the smooth and easy exhaust back pressure that makes of exhaust is stable.

As Fig. 5, this case outlet pipe structure can be embodied as two discharge pipes, and also promptly two discharge pipes 33,34 are parallel, and the set-up mode of each discharge pipe 33,34 is ditto described.Principle according to the control of epimere back pressure can be known by inference, and the waste gas that two discharge pipes can be accelerated first expansion space 21 disengages speed, increases air displacement, reduces the pressure of first expansion space 21, and the relative back pressure that makes the outlet pipe structure reduces.

Fig. 3, Fig. 4, Fig. 5 are the schematic representation that this case outlet pipe is embodied as straight formula, are applicable to the vehicle of front-located mode engine.Fig. 6 then is embodied as the schematic representation of horizontal type for this case outlet pipe, be applicable to the vehicle of rear-mounted engine.Main structure is identical with previous embodiment, and the difference part is that hush pipe 20 is horizontal with outlet pipe unit 30, and making waste gas is horizontal flowing.Air inlet tube 40 is the bend pipe kenel with 50 of tailpipes, so that connect the engine exhaust manifold and waste gas is drained into the rear view of vehicle space outward.In Fig. 6, described hush pipe 20 is established another tailpipe 51 and is communicated with described first expansion space 21, and the waste gas of accelerating first expansion space 21 that is provided with of two discharge pipes disengages speed, increases air displacement.

As Fig. 7, be that single discharge pipe 33 is provided with bloop 333.As Fig. 8, be to be equipped with bloop 333,343 on two discharge pipes 33,34.Its objective is to make waste gas outwards also can obtain the sound absorption of noise reduction cotton 23 in the discharging process, and make exhaust noise littler.This embodiment makes the air inlet of outlet pipe unit 30 and exhaust all obtain sound deadening,

More than explanation is just illustrative for the utility model, and it is nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited, can make many modifications, variation or equivalence, but but all will fall within the claim restricted portion of the present utility model.

Claims (8)

1. the rotary type outlet pipe of two expansion spaces structure is characterized in that, comprising:

One dividing plate (31);

At least one revolution suction tude (32) is fixed on the described dividing plate (31), and its inlet end (321) and outlet end (322) are positioned at the same side of described dividing plate (31);

At least one discharge pipe (33) is fixed on the described dividing plate (31), and its inlet end (331) is equidirectional with the inlet end (321) of above-mentioned revolution suction tude (32) with outlet end (322);

One hush pipe (20), aforementioned barriers (31) is fixed in the described hush pipe (20), described hush pipe (20) inner space is separated into one first expansion space (21) and second expansion space (22), and the volume of first expansion space (21) is less than described second expansion space (22), the outlet end (322) of described revolution suction tude (32), and the inlet end (331) of described discharge pipe (33) is positioned at described first expansion space (21).

2. according to the rotary type outlet pipe structure of described pair of expansion space of claim 1, it is characterized in that: the pipe shaft of described revolution suction tude (32) is provided with bloop (323), and described second expansion space (22) is provided with noise reduction cotton (23).

3. according to the rotary type outlet pipe structure of described pair of expansion space of claim 1, it is characterized in that: described dividing plate (31) is provided with a plurality of bloops (311).

4. according to the rotary type outlet pipe structure of described pair of expansion space of claim 1, it is characterized in that: the tube wall of described discharge pipe (33) is established a plurality of bloops (333).

5. according to the rotary type outlet pipe structure of described pair of expansion space of claim 1, it is characterized in that: described discharge pipe (33) is a straight tube.

6. according to the rotary type outlet pipe structure of described pair of expansion space of claim 1, it is characterized in that: what another discharge pipe (34) was parallel with aforementioned discharge pipe (33) is fixed on the described dividing plate (31).

7. according to the rotary type outlet pipe structure of described pair of expansion space of claim 6, it is characterized in that: the tube wall of described two discharge pipes (33), (34) is all established a plurality of bloops (333), (343).

8. according to the rotary type outlet pipe structure of described pair of expansion space of claim 1, it is characterized in that: the tube end of described hush pipe (20) is fixed a tailpipe (51), and the inlet end of described tailpipe (51) is positioned at described first expansion space (21).

Images