Abb Schweiz Ag

Abb Turbo Systems Ag

Turbo Systems Switzerland Ltd.

Asea Brown Boveri Ag

Wartsila Finland Oy

Christoph Mathey

Stephan Senn

Joel Schlienger

Patrick Aberle

Jozef Baets

Heikki Mikonaho

Olaf Baudisch

Alfons Tröndle

Balz Flury

Dominique Bochud

Andreas Strebel

Ennio Codan

Raphael Ryser

Paolo Tremuli

An exhaust turbine includes a turbine wheel having a plurality of rotor blades, an exhaust outlet where the exhaust outlet is arranged downstream of the rotor blades and is delimited radial to the outside by an axial turbine diffusor. An exhaust mass flow can be output in an axial flow direction by the exhaust outlet duct and the axial turbine diffusor opens downstream, radially to the outside at a non-constant diffusor-opening angle, such that at a first diffusor-opening angle deviates from a second diffusor-opening angle by at least 1°. The exhaust turbine further includes a waste gate duct, the outlet region of which opens into the diffusor or directly downstream of the diffusor into the exhaust outlet duct. The waste gate duct is designed to generate a substantially axial flow direction of a waste gate mass flow at the outlet region of the waste gate duct.

Concentric introduction of the waste-gate mass flow into a flow-optimized axial diffusor

A multi-stage turbocharging assembly is described. The multi-stage turbocharging assembly includes a high-pressure stage including a high-pressure turbine coupled with a high-pressure compressor. Additionally, the multi-stage turbocharging assembly includes a low-pressure stage including a low-pressure turbine coupled with a low-pressure compressor: Further, the multi-stage turbocharging assembly includes a casing enclosing the high-pressure stage and the low-pressure stage, wherein the casing is a single unit.

Multi-stage turbocharging assembly

The invention relates to an exhaust gas turbine, comprising a turbine rotor () having a plurality of turbine rotor blades () with a turbine rotor blade height H. The exhaust gas turbine further comprises a diffuser arrangement () having a transverse diffuser () and an exhaust gas collection chamber (). The transverse diffuser () is arranged downstream of the turbine rotor blades (). The transverse diffuser () has a curved diffuser channel () which opens into the exhaust gas collection chamber () at a diffuser channel outlet (). A M/H ratio between an axial extension M of the exhaust gas collection chamber () and the turbine rotor blade height H has a value of 1.0&#x2264;M/H&#x2264;4.6 and a P/H ratio between a radial extension P of the diffuser arrangement () and the turbine rotor blade height H has a value of 2.7&#x2264;P/H&#x2264;4.9. A D/H ratio between a radial expansion D of the diffuser channel section () and the turbine rotor blade height H has a value of 2.5&#x2264;D/H&#x2264;3.0 and a R/H ratio between a turbine hub radius R and the turbine rotor blade height H has a value of 1.1&#x2264;R/H&#x2264;1.5.

Diffusor device for an exhaust gas turbine

The invention relates to an exhaust gas turbine, comprising a turbine wheel () with a multiplicity of moving blades () and an exhaust-gas outlet duct (), which is arranged downstream of the moving blades of the turbine wheel. The exhaust-gas outlet duct () is delimited radially on the outside by an axial turbine diffuser () and radially on the inside, at least partially, by a spinner (). The axial turbine diffuser () is formed by a number N&#x3e;1 of successive conical diffuser segments. An axial diffuser opening angle A between successive diffuser segments is A&#x3e;1.0&#xb0;. A ratio L/H between an axial diffuser segment length L and an entry height H of the exhaust-gas outlet duct () is L/H&#x3e;0.01. A ratio H/S between the entry height H of the exhaust-gas outlet duct and a maximum radius S of the spinner () is H/S&#x3e;1.0. The spinner () is formed by a number P&#x3e;1 of successive conical spinner segments. An axial spinner opening angle B between successive spinner segments is B&#x3e;1.0&#xb0;. A ratio M/H between an axial spinner segment length M and the entry height H of the exhaust-gas outlet duct () is M/H&#x3e;0.01.

Diffuser of an exhaust gas turbine

Exemplary embodiments of the present disclosure are directed to a 2-stage supercharging unit having a housing unit which integrates within it a high-pressure charger and a low-pressure charger. The rotor axes of the two chargers are vertical with respect to the housing unit, which can be screwed directly via the housing base to the side of an internal combustion engine. As a result, increased flexibility is made possible with regard to the connection of the supercharging unit to the cooler and to the internal combustion engine, whereby the structural volume of the supercharging assembly can be additionally reduced.

Housing of a radial compressor

A vibration suppressor and a vibration damper are configured in a system including an internal combustion engine and an exhaust-gas turbo charger. The vibration suppressor and vibration damper are secured to an exposed place on the system which is subjected to strong vibrations. As the vibrations are the strongest in said area, the vibration reducer can be used to a maximum. The system including the internal combustion engine and the exhaust-gas charger is enhanced in such a manner that the internal combustion engine can be operated in all of the rotational speed ranges without reducing the service life of individual components or the entire system.

Vibration suppressor

Depending on the actual operating situation and the composition of the fuels used for driving the internal combustion engine, contamination of the moving blades, of the guide device and of the turbine casing parts occurs sooner or later in the exhaust gas turbine. According to the invention, a small quantity of cleaning fluid is fed continuously or cyclically into the exhaust gas flow of an exhaust gas turbine and is directed onto the components to be cleaned. The small quantity of cleaning fluid can be fed in with unchanged operation of the internal combustion engine, such that the exhaust gas turbine can be cleaned or kept clean within the entire operating range of the internal combustion engine. Fluctuations in the power output of the internal combustion engine on account of requisite cleaning of the exhaust gas turbine therefore do not occur. Furthermore, the formation of thermostress cracks in the critical turbine casing parts is largely avoided.

Turbine cleaning method

A simple exhaust system is disclosed with improved operational reliability and an increased service life for a turbocharged internal combustion engine, in which system both the advantages of shock-wave charging and those of pulse-converter charging are used, depending on the operating state of the internal combustion engine. These advantages are achieved by virtue of the fact that extension pieces (12, 13) are formed for the shock pipes (6, 7) and are arranged upstream of the connection line (8, 9) furthest away from the exhaust turbine (5). Each shock pipe (6, 7) is connected to a corresponding extension piece (12, 13). The interconnection conduit/s (14) is/are formed between the extension pieces (12, 13). Each interconnection conduit (14) has a cross-sectional constriction (15).

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Fislisbach, Switzerland

Christoph Mathey