DD207121A3 - DEVICE FOR COMBINING TWO EXHAUST GASES OF INTERNAL COMBUSTION ENGINES - Google Patents

Abstract

The invention relates to an advantageous Zusammenfuehrung the exhaust pipes of two or more similar internal combustion engines, preferably in a ship's chimney. It is the object of the invention to reduce a large chimney in its cross section, which is caused by many leading up exhaust pipes. It is an object of the invention that the corresponding device with relatively low production costs possibly occurring different operating conditions of the individual motors is fair. The solution is that in a double nozzle tube 6 with centrally arranged partition wall 7 arranged symmetrically to each other, duesen, provided with halbkreisfoermigen Oeffnugen exhaust pipes einmuenden at a certain angle and the Doppelduesenrohr 6 a diffuser 12 is connected downstream of the common exhaust pipe 13 is connected , Applicable the invention is everywhere where multiple exhaust pipes are passed through a chimney and the chimney thus claimed a large base area, for example, the free Decksflaeche on a fishing vessel.

Description

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a) Title of the invention

Sinrichtung zuia merging two exhaust streams of Terorsnnungskraftmaschinen

b) Field of application of the invention

On ships, the exhaust pipes of several similar diesel engines are led up the chimneys. These chimneys are arranged, for example, on fishing vessels on port and starboard side. When placing the exhaust pipes in these chimneys, the invention is applicable.

c) Characteristic of the known technical solutions

The direct merging of two exhaust gas streams in chimneys is not yet known on ships. In the case of several identical diesel engines, the exhaust pipes for each diesel engine are led separately through the chimney to the outside. As a result, the chimney has relatively large dimensions and therefore takes - especially with double arrangement on fishing vessels -. a large proportion of the free working deck in fog. This is of course detrimental to the execution of the numerous fisherman simulations. Although there are already mergers of exhaust pipes, but they give as for example in the injector different operating conditions for the one-diesel engines. So arise in this jet apparatus with dog and Hundringstrahlstrahl different Saügwirkungen. Therefore, this kind of merging with engines is not

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used. Only in HE 2328692 a jet apparatus' for generating a negative pressure for controlling the charging device is used in the form that nozzle-shaped 3ohrstücke in'einem mixing tube ends «When applying all the benefits, however, here enters a high pressure loss. Zusankerführungen the exhaust gas flows of the individual cylinders are known according to the firing order, such as in SU ₄ 59 ^ 590 and 3U 754093, wherein in the latter also baffles are arranged for gradual mixing of the partial streams. However, here too high pressure losses occur in addition to the high production costs. When merging exhaust pipes in a known manner - ie without additional equipment arises in only one diesel engine in operation no suction in the other exhaust pipes and so with the exhaust pipe open exhaust gases from the operating diesel engine undesirably penetrate into the engine room. Thus, all known Zusammenfuhrungea of exhaust gas streams of diesel engines in practice is not widely used and the chimney is therefore very space consuming ·

d) Object of the invention

It is the object of the invention to reduce a large chimney, in particular on ships, in its cross-section by many upwardly leading exhaust pipes, thus gaining more space on the open deck.

e) Explanation of the nature of the invention

Based on the known Abgasrohrleit longitudinal guides or -zusammenführungen with their disadvantages, it is the object of Srfindung to present a device for merging two exhaust streams of 7erbrennungskraftmaschinen, which is gere'wird at relatively low production cost possibly occurring different operating conditions of the individual engines.

The reading of the task according to the invention consists in opening zv / ei symmetrically, mutually arranged, nozzle-shaped exhaust gas conduits provided with semicircular openings at a specific V. angle into a Dopce nozzle tube with a centrally arranged partition wall and a diffuser is пасhgsseaaltet the double nozzle tube,

237 3 96

is connected to the dia common exhaust pipe.

The Sinmündung the two Abgasrohrleitiungan happens to be symmetrical under a Torzugswinkei of 30 ° to Trennwand.im double nozzle tube.

According to another feature, the diameter of the two exhaust pipes is equal to 0.8 to 0.9 times the diameter of the double nozzle tube.

Sfach another feature is the diameter of the common exhaust pipe 1.25 times the diameter of the double nozzle tube.

According to yet another feature, the diffuser is removable and is about half its opening angle about 8.

According to yet another feature exchangeable Paßbleche are arranged on both sides of the partition wall of the double nozzle tube.

When the device according to the invention is put into operation, a suction effect is exerted on the exhaust pipes of diesel engines which are not in operation. This allows exhaust pipes from diesel engines of different operating conditions to be combined to form a common exhaust pipe in a chimney.

f) embodiment

The invention will be explained in more detail below using an exemplary embodiment. The accompanying drawings show schematically in Jig. 1 shows the overall system of merging two exhaust pipes, and FIG. 2 shows the double nozzle pipe with the semicircular nozzles arranged symmetrically.

The exhaust pipes 1 and 2 of the diesel engines 3 and 4 are connected to the splitter 5 to the double nozzle tube 6. The double nozzle tube 6 is formed so that by the division of the nozzle tube 6 in the middle by the partition 7 two symmetrically arranged and housed in a Hohrstück with the diameter d _D semicircular Düssn 8 and 9 Torliegen, via which the two exhaust gas streams merged vjerden. The two

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Connecting pipes 10 and 11 of the two exhaust pipes are suitably connected at an angle of 30 to the partition wall 7 to the Doppeldüsenroar so that a gradual change in cross section is achieved to the semi-circular nozzle cross-section. The advantageous ratio of the diameter of the connecting pipes 10,11 d, T to the double nozzle tube б d ^ is «G, S to 0.9 · The double nozzle tube б is followed by a diffuser 12 whose half-opening angle is 8 °. The diameter ratio diameter common exhaust pipe 18 aд / й-п diameter of the double nozzle lobe it б should be about 1,25. At a distance of about 3.5 times d. from the double nozzle tube 6, the exhaust muffler 15 is installed in the common exhaust pipe 13. At the common partition wall 7 fitting plates 16 and 17 are mounted on both sides, the size of which can be varied.

7 ^»r uring the operation of both diesel engines 3 and 4 of the same power are combined both exhaust gas volume flow rates through the two semi-circular nozzles 8 and 9. The common exhaust stream is then delayed in the diffuser 12 to the required speed of the subsequent exhaust pipe 13. The mixing zone 14 of both semicircular gas jets is in the middle of the exhaust pipe 13th

If only one diesel engine 3 or 4 is in operation, then the semicircular gas stream exiting from the nozzle 8 or 9 is guided by half the circumference of the circumference. · In the middle, an open jet surface acting with the double nozzle tube dia meter results, which increases due to the beam extension. an effective elliptical mixing layer 14 is formed between the jet and the surrounding air. At this mixing surface 14, the sintering exchange takes place between the gas jet and the air, whereby the Luftteilcaen accelerated and entrained by the gas jet. As a result, a negative pressure and thus a suction effect is generated in the exhaust pipe 1 or 2 of the non-operating diesel engine 3 or 4. Exhaust gases of the diesel engine 3 or 4 in operation can thus not flow via the open exhaust gas line 1 or 2 of the stationary diesel engine into the engine room. The length 1_ of the mixing surface 14 of the gas jet is l_s * 3 »5 d ... Since the exhaust muffler 15 has large Hohrleitungsdruckveriuste, it is not z-.

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moderately arranging it so that the mixture sf iac reaches into the exhaust silencer 15. Therefore, the distance of the exhaust silencer 15 from the double-nozzle tube must be б 1> (0.8 to 1).

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his. The semicircular cross-section of the nozzles 3 and 9 must be such that the speed c ^ and thus the kinetic energy of a semicircular jet of a diesel engine 3 or 4 is greater than that of the nozzle 8 or 9 subsequent pressure and discharge losses ^ Δρ + Δ The change in the nozzle cross section can be made by exchangeable fitting plates 16 and 17, which are mounted on the dividing wall 7 in the double nozzle tube 6. As in an open exhaust pipe 1 or 2 air is sucked out of the engine room through the gas jet emerging from the nozzle 8 or 9, the pressure losses Δ Py and outlet concurrency Δρ occurring subsequently to the double jet pipe 6 must occur. a gas velocity based on an approximately 8-10% higher exhaust gas volume flow V _{Q of} a diesel engine 3 or 4 corresponds to Väs (1,08 - 1,1) · V ^. Thus, a reduction of the chimney is possible without adverse Febenwirkungen when operating only a diesel engine 3 or 4.

Claims (3)

r ϊ ι η α α η ^ S η S or u u c rl 1. 3inj? Ich.timg for merging two exhaust streams from 7erbrennungskraftmaschinen, consisting of two Hohrleitungen, which are continued as a common! characterized in that in a double nozzle tube (6) with centrally arranged partition wall (7) two correspondingly shaped nozzle-shaped with semicircular openings provided Abgasrohrlaituiigen (1; 2) in a certain ein7іпппізі open and the double nozzle tube (6) is followed by a diffuser (12) at the common Abgasroarleitung (13) is connected t. 2. device for merging two exhaust gas streams of combustion machines mac a Рипкт; 1, characterized in that the two exhaust pipes (1; 2) symme orisca the dividing wall (7) open at a 7orzugswinksi of 30 ° in the double nozzle tube (6). J -JJ-JJ-L ^. Κι ίΧ Uü.i ~ и U-Ul iJ uOduLaCl ^. ^ .iJ-i C JL JJiJCj. ¹ : ^ dUg ^ oOJi CiIiC V uiJ. V Gu. - Brennkraftmaschinsn паса dan points 1 and 2, characterized in that the diameter d-- of the two Abgasroarisitungen (1; 2) equal to 0.3 to 0.9 sal the diameter ä. ^ Of the Doppeidüsenrohres (6) amount. -г · ι 'ι. .H 'ι "''"''' ^£ д / Ui j-i ^ j UodiU-ii; U it- - с- ы .ν C-LC j. ^ u ^ aao -j_ v ^ u ^ ts ν ν *. IAEI ~ breimuiLgskraf tmaschinsn паса leu r'umk-en 1 to 3, characterized in that isr through 237396 5 »Sinrichtung for merging two exhaust gas streams of internal combustion engines according to item 1, characterized t sign that the diffuser (12) is removable and its half-opening angle is about 8 °. 6. Device for merging two exhaust streams of 7erbrennungskraftmaschinen according to item 1, characterized in that on both sides of the partition wall (7) of the double nozzle tube (6) replaceable Paßbleche (16; 17) are arranged. For this 2 sheets of drawings