DK142089B

DK142089B - Turbocharger with double-walled cooling outlet for the exhaust gas.

Info

Publication number: DK142089B
Application number: DK357577A
Authority: DK
Inventors: Georgy Polikarpovich Sivolap; Vyacheslav Alexeevich Potanin; Nikolai Alexandrovich Belinsky; Evgeny Alexandrovich
Original assignee: Sp Kb Turbonagnetatelei
Priority date: 1977-08-11
Filing date: 1977-08-11
Publication date: 1980-08-25
Also published as: DK142089C; DK357577A

Description

142089142089

Opfindelsen angår en turbokompressor med et kompressorhus, der omgiver en kompressorrotor, et indløbshus for varm gas til en turbinerotor, der er monteret på samme aksel som kompressorrotoren, samt et væske-5 kølet udløbshus for den varme udstødsgas fra turbinen, hvilket udløbshus har en af stålkomponenter saramensvejst, dobbeltvægget kappe med indvendigt hulrum for gennemstrømning af kølevæske.The invention relates to a turbo compressor with a compressor housing surrounding a compressor rotor, a hot gas inlet housing for a turbine rotor mounted on the same shaft as the compressor rotor, and a liquid-cooled outlet housing for the hot exhaust gas from the turbine, which has one of the steel components saramen welded, double-walled sheath with internal cavity for flow of coolant.

I kendte turbokompressorer af den omhandlede 10 art er udløbshusets kappe udformet efter samme konstruktionsprincipper og med samme facpn som støbte udløbshuse, og tykkelsen af kappens glatte pladevægge er stort set den samme som i de støbte huse.In known turbo compressors of the present kind, the casing of the outlet casing is designed according to the same design principles and with the same shape as molded outlet casings, and the thickness of the casing smooth plate walls is substantially the same as in the cast casing.

En turbokanpressor ifølge opfindelsen er ejendarme-15 lig ved,at den ddbbeltvaggede kappe består af dels et skelet sammensat af to endeflanger og et antal aksialt langsgående valsede stålprofiler,som er anbragt med indbyrdes mellemrum i omkredsretningen og med sine ender er svejst til endeflangerne, dels langsgående s tålplader, acm strødcker sig over 20 irellanrummet mellem stålprofilerne og er svejst til disse og til endeflangeme,og son sartnen med stålprofilernes udadvendende dele danner kappens ydervæg,dels en glat stålplade,der er valset eller bukket til U-formet tværsnit og sve^st til endeflangerne og til to modstående kanter af husets udløbs-25 flange, og som danner kappens indervæg.A turbocharger according to the invention is peculiar in that the die-cradled sheath consists of partly a skeleton composed of two end flanges and a plurality of axially longitudinally rolled steel profiles which are spaced apart circumferentially and with their ends welded to the end flanges and partly longitudinal steel plates, which extend over the space between the steel profiles and are welded thereto and to the end flanges, and the outer part of the steel profiles forms the outer wall of the jacket, partly a smooth steel plate rolled or bent to U-shaped cross-section and sts to the end flanges and to two opposite edges of the outlet flange of the housing, forming the inner wall of the sheath.

Herved muliggøres en reduktion af udløbshusets vægt, som væsentligt overstiger den, der skyldes stålets højere styrke og stivhed sammenlignet med støbegods . Dette hænger sammen med, at de langsgående, val-30 sede profilers krop- og flangedele indgår henholdsvis i i kappens ydervæg og som tværvægge, <$er på samme tid afgrænser strømningskanaler for kølevæsken og afstiver indervæggen ved at optage udad rettede trykkræfter fra udstødsgasserne og/eller termisk udvidelse af inder-35 væggen. Som følge heraf opnås en høj stivhed af skelettet og dermed også af kappen som helhed, selv med små godstykkelser i den indre pladevæg og i de aksialt langsgående plader, som er indsvejst mellem de styrkegivende stål- 2 142089 profiler. Udformningen af kappen letter også opdagelse og reparationssvejsning af eventuelle fejl, som måtte opstå under fremstillingen eller under kompressorens drift.This makes it possible to reduce the weight of the outlet housing, which substantially exceeds that due to the higher strength and stiffness of the steel compared to castings. This is due to the fact that the body and flange portions of the longitudinal roller profiles are included in the outer wall of the casing and as transverse walls, respectively. <$ Is at the same time delimiting flow channels for the coolant and stiffens the inner wall by absorbing outward pressure forces from the exhaust gases and / or thermal expansion of the inner wall. As a result, a high stiffness of the skeleton and thus also of the sheath as a whole is obtained, even with small thicknesses of wall in the inner sheet wall and in the axially longitudinal sheets which are welded between the reinforcing steel profiles. The design of the jacket also facilitates detection and repair welding of any defects that may occur during manufacture or during operation of the compressor.

5 Den i tværsnit U-formede indervægs egen- stivhed mod indadgående deformation fra den cirkulerende kølevæskes tryk er mindre i de retliniede afsnit af U'et end i væggens krumme midterparti. For at forebygge sådanne deformationer kan kraftoverførende forbin-10 delseselementer, som fortrinsvis er rørformede, være indsvejst mellem den U-formede stålplade og kappens ydervæg på mindst to steder, der ligger symmetrisk i forhold til et aksialt centersnitplan gennem udløbsflangens midte.The intrinsic U-shaped inner wall stiffness against inward deformation from the circulating coolant pressure is smaller in the rectilinear portions of the U than in the curved middle portion of the wall. To prevent such deformations, power-transmitting connecting elements, which are preferably tubular, may be welded between the U-shaped steel plate and the outer wall of the casing in at least two locations symmetrical to an axial center section plane through the center of the outlet flange.

15 I en foretrukket udførelsesform har de aksialt langs gående stålprofiler hovedsagelig U-formet tværsnit og er anbragt med tværsnittets konkave side vendende mod kappens indervæg.In a preferred embodiment, the axially longitudinal steel profiles have substantially U-shaped cross sections and are arranged with the concave side of the cross section facing the inner wall of the sheath.

Opfindelsen forklares nærmere i det føl-20 gende ved hjælp af et udførelseseksempel på en turbokompressor ifølge opfindelsen og under henvisning til tegningen, hvor fig. 1 skematisk viser et længdesnit gennem turbokompressoren, 25 fig. 2 et længdesnit af turbokompressorens kølede udløbshus for udstødsgas fra turbinen, og fig. 3 et snit efter linien III-III i fig.The invention will be explained in more detail below with reference to an embodiment of a turbo compressor according to the invention and with reference to the drawing, in which fig. 1 is a schematic longitudinal section through the turbocharger; FIG. 2 is a longitudinal sectional view of the turbocharger cooled exhaust gas housing of the turbine; and FIG. 3 is a sectional view taken along line III-III of FIG.

2.2nd

På tegningen er vist en turbokompressor, 30 som har et kompressorhus 1, der omgiver en kompressor-rotor 2, og et indløbshus 3 indrettet til at lede varm gas til en turbinerotor 4. Fra rotoren 2 strømmer den komprimerede luft gennem en diffusor 5 ind i en spiralkanal 6 i kompressorhuset og derfra til cylin-35 drene i en ikke vist forbrændingsmotor.The drawing shows a turbo compressor 30 having a compressor housing 1 surrounding a compressor rotor 2, and an inlet housing 3 arranged to direct hot gas to a turbine rotor 4. From the rotor 2, the compressed air flows through a diffuser 5 into the a spiral channel 6 in the compressor housing and thence to the cylinders of an internal combustion engine not shown.

Turbinerotoren 4 er monteret på samme aksel 7 som kompressorrotoren 2. Denne aksel 7 er beskyttet mod påvirkning fra den varme udstødsgas vedThe turbine rotor 4 is mounted on the same shaft 7 as the compressor rotor 2. This shaft 7 is protected against the influence of the hot exhaust gas at

Claims

142089 by means of a heat insulating sheath 8. Furthermore, the turbo compressor has a cooled exhaust housing 9 for exhaust gas from the turbine. Through a nozzle 10 in the opening of the gas inlet housing 3, hot propellant flows to the turbine rotor 4. connecting flanges 11 and 12. In the spaces between the profiles 13 are welded plates 14, which together with the profiles 13 constitute the outer wall of the housing 9. The inner wall of the housing 9 is constituted by a thin smooth U-shaped steel plate 15 welded to the flanges 11 and 12 and which together with the profiles 13 and the plates 14 define passages between the inner and the outer wall of the housing 9 for circulating coolant. The inner wall and plates 14 are connected by force-transmitting connecting elements 16, which are welded in at least two places, which prevent deformation of the plate 15 due to the pressure in the circulating coolant 20. In a cylindrical recess in the housing 9 on the side of the flange 11, there is a maze seal 17 which prevents leakage of air from the compressor rotor 2 to the interior space 18. The maze seal = 25 17 is fitted with the heat insulating sheath 8.

1. A turbo compressor with a compressor housing (1) surrounding a compressor rotor (2), a hot gas inlet housing (3) for a turbine rotor (4) mounted on the same shaft (7) as the compressor rotor, and a fluid cooled outlet housing (9) for the hot exhaust gas from the turbine, said outlet housing having one of the steel components welded, double-walled sheath with internal cavity for flow of coolant, the end being characterized by the double-walled sheath being partly of a skeleton consisting of 35 two end flanges (11,12) and a plurality of axes.1a.long longitudinally rolled steel profiles (13), spaced apart in