DE7627763U1 - EXHAUST TURBOCHARGER - Google Patents

Description

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MOTOR »· AND TURBINE UNION ······· FRIEDRICHSHAFEN GMBH

Friedrichshafen

Exhaust gas turbocharger

The invention relates to an exhaust gas turbocharger for internal combustion engines with a turbine wheel through which the exhaust gases flow radially from the outside to the inside and a water-cooled one Casing.

.Exhaust gas turbochargers are used in internal combustion engines, to increase the amount of air for a cylinder charge with the help of the energy contained in the exhaust gases and thus with the same dimensions of the internal combustion engine to achieve a higher performance.

It is necessary to design the exhaust gas turbocharger according to the intended use of the associated Internal combustion engine and make according to the internal combustion engine type.

The ti £? Bin-side coordination requires an associated turbine housing size for each application point when running ot ^ ie the turbine guide ring. With the demand for a cooled housing design, this leads to costs for the various turbine housing sizes that are hardly justifiable from an economic point of view.

09/01/1976 7620

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7627763 29.1177

It is the object of the invention to design a cooled exhaust gas turbocharger in such a way that it can be operated in the best possible way with little effort can be adapted to different application points.

This object is achieved in that between the turbine wheel and the housing there is an annular ring centered in the housing Insert made of heat-resistant steel radially around the Turbine wheel is arranged, which forms the outer fixed turbine wheel cover and the guide of the discharge takes over when entering and exiting the turbine wheel.

Depending on the intended use of the exhaust gas turbocharger, the insert piece can be designed as a single- or double-flow spiral for various turbine output configurations are, while the housing and the remaining parts of the exhaust gas turbocharger unchanged for a variety of applications can be taken over.

In addition, there is a gap between the housing and the insert, which acts as insulation the possibility of intensive cooling of the housing without a undesirably strong cooling of the exhaust gases and the associated heat load on the cooling system are increasing have to.

Thanks to the insert made of heat-resistant steel, the housing even if bursting safety is required from light metal cast getting produced.

In claims 2 to £ are further advantageous embodiments of the inventive idea included.

OI.O9.i97o 7620

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7627763 12/29/77

Two embodiments of the invention are in the drawing and are described in more detail in the following. Show it:

1 shows a longitudinal section through an exhaust gas turbocharger a single-flow spiral,

2 shows a longitudinal section through the turbine of an exhaust gas turbocharger with double-flow spiral,

Fig. 3 shows a cross section through the Zugasanschluss for a Spiral according to FIG. 2.

In Fig. 1, the exhaust gas turbocharger shown consists essentially from a turbine wheel 11 and a compressor wheel 12. 3both impellers are connected to a shaft 1p, the is mounted in a housing 14. The housing 14 is in the Height of the turbine wheel 11 transversely to the axial direction of the exhaust gas turbocharger divided. An annular insert 15 is made between the turbine wheel *? 1 and the housing 14 Heat-resistant steel arranged radially around the turbine wheel 11; In the exemplary embodiment, the insert is a single-flow Spiral 16 shown, forms the exhaust gas inlet, the outer one fixed turbine wheel cover and takes over the guidance of the exhaust gases as they exit the turbine wheel 11. The centering of the insert takes place on the first housing half via a collar 17 on the housing and a corresponding one Bore in the insert and on the second housing half via a collar 18 on the insert and a corresponding one

OI.O9.1976 7620

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7627763 2S.12.77

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Bore in the housing - The axial fixing of the insert is made via the between the two housing parts arranged tubular exhaust gas inlet I9. This is ensures that the insert piece by different Expansion coefficients or different expansions caused by different heating housing and insert are firmly clamped or properly centered.

In Fig. 2, the housing 14 is transverse to the axial direction of the exhaust gas turbocharger divided at the level of the turbine wheel outlet. The insert I5 is designed as a double spiral and is fixed in the axial direction by a bolt. Centering is done in the same way as in Fig. 1. One housing half is designed as an exhaust manifold 21, during assembly, optionally in different ways according to the requirements of the internal combustion engine Pivoting positions is connected to the other housing part.

In Fig. 3 one of two pipe bends 22 is shown, which the connection: between the exhaust pipe 23 and the

Produce insert I5 and assemble the Ani
'closing flange 2A sealingly clamped.

09/01/1976 7620

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7627763 29.1177

Claims (1)

■ j discussions 1. Exhaust gas turbocharger for internal combustion engines irit a radial The exhaust gases flow through the turbine wheel from the outside in and a water-cooled housing, characterized in that there is between the turbine wheel (11) and the housing (14) an annular ring centered in the housing Insert (15) made of heat-resistant steel is arranged radially around the turbine wheel, which covers the outer stationary turbine wheel forms and takes over the management of the exhaust gases as they enter and exit the turbine wheel. 2 »exhaust gas turbocharger according to claim 1 with a transverse to the axial direction of the exhaust gas turbocharger at the level of the turbine wheel divided housing, characterized in that the Insert (15) on the first housing half over a collar (17) on the housing (14) and a corresponding ßohrung in the insert and on the second housing half via a collar (18) on the insert and a corresponding one Bore is centered in the housing, and that an axial fixation of the insert over the between the two Housing parts arranged tubular exhaust gas inlet nozzle (19) of the insert takes place. 5. exhaust gas turbocharger according to claim 1 with a transverse to the axial direction of the exhaust gas turbo-charger at the level of the turbine oil. 09.1976 7620 gm-se 7627763 12/29/77 wheel outlet split housing, characterized in that that arranged in one on the circumference of the first housing half Connection flange surface depending on the version of the Insert (15) for single- or double-channel exhaust gas feed one or two pipe bends (22) are used, which establish the connection between the exhaust pipe (23) and the insert and clamped tightly or directly through the assembly of the connecting flange (24) are attached to the housing (14). 4. Exhaust gas turbocharger according to claim 3, characterized in that one housing half is designed as an exhaust manifold (21) which is optionally connected to the other housing part during assembly according to the requirements of the internal combustion engine in different Schvfenkstellung. Oi.09.i976 7620 gm-se 7627763 12/29/77