| Title of Invention | TURBOCHARGER |
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| Abstract | The invention relates to a turbocharger (1) provided with a turbine housing (2) for turbine wheels, a cartridge (K) for the variable turbine geometry positioned in the turbine housing (2), a bearing housing (3) which is arranged between said turbine housing (2) and a compressor housing of the compressor wheel and in which a bearing arrangement for a shaft (W) carrying the turbine and compressor wheels is mounted and a pane system (4) placed between the cartridge (K) and the bearing housing (3). The inventive turbocharger is characterized in that said pane system (4) consists of at least two material layers (5,6), an air gap (7) is formed between the material layers (5,6), the material layer (5) is embodied in the form of a conical plate and the other material layer (6) is provided with a bend (8). |
| Full Text | WO 2006/133793 PCT/EP2006/004905 Turbocharger Description The invention relates to a turbocharger according to the preamble of claim 1. Such a turbocharger is known from EP 1 398 463 A1 . In this turbocharger, a heat shield is provided around its shaft on the turbine side and serves to protect the bearing housing from damage due to elevated temperatures on account of the exhaust gases of the internal combustion engine which flow through the turbine. The known heat shield consists of a single-layer component, the heat insulation properties of which, however, are in need of improvement. A further arrangement is shown in EP 0 160 460 B1, a disk spring being used here which exerts an axial preloading force on the vane ; ring to be fixed axially. The functioning of the heat insulation is not necessary on account of the remoteness of the turbine wheel at this point. It is therefore the object of the present invention to provide a turbocharger of the type specified in the preamble of claim 1 which firstly ensures axial fixing of the cartridge of the variable turbine geometry in the vicinity of the turbine wheel by means of a disk spring and secondly permits improved heat insulation in the direction of the bearing housing via the heat shield. This object is achieved by the features of claim 1. WO 2006/133793 - 2 - PCT/EP2006/004905 The disk arrangement of the turbocharger according to the invention is formed from at least two material layers, but if need be from a plurality of material layers, and includes both the function of producing the preloading force and the improvement of the screening function by increasing the heat resistance. As a result, it is possible to ensure the functioning, especially at increased exhaust gas temperatures. In addition, liquid cooling of the bearing housing can possibly be advantageously dispensed with. Due to the provision of a plurality of material layers, it becomes possible to provide an air gap between the material layers in order to further improve the preloading force properties and/or the heat insulation properties. To this end, one of the material layers is provided with a bend which provides two regions arranged at a preferably obtuse angle to one another, while the other material layer is designed as a disk in accordance with a Belleville spring. The subclaims concern advantageous developments of the invention. The material layers form two separate parts, preferably shaped plates, which rest one on top of the other in the region of their outside diameter. Furthermore, it is in principle possible for the material layers to be made of the same material or for different materials to be selected. WO 2006/133793 - 3 - PCT/EP2006/004905 In claim 10, a disk arrangement for a turbocharger according to the invention is defined as object which can be sold separately. Further details, advantages and features of the present invention follow from the description below with reference to the drawing, in which: fig. 1 shows part of a turbocharger according to the invention with a disk arrangement according to the invention, and fig. 2 shows an enlarged illustration of the disk arrangement according to the invention. A section of a turbocharger 1 according to the invention is shown in fig. 1, since this illustration is sufficient for the explanation of the principles according to the invention. Of course, the turbocharger 1 has all the constructional elements normally provided, which, however, as stated, are omitted in fig. 1 in order to simplify the illustration. Therefore a turbine housing 2 of a turbine is shown in fig. 1, said turbine housing 2 being arranged adjacent to a bearing housing 3. This bearing housing 3 is arranged between the turbine housing 2 and a compressor housing (not shown) of a compressor wheel (likewise not depicted) . The bearing housing 3 has the bearing for a shaft, which in fig. 1 is symbolized by the dot-dash center line M, since fig. 1 only reproduces the top section of the turbocharger 1 according to the invention. The shaft W carries the turbine and the compressor wheel WO 2006/133793 - 4 - PCT/EP2006/004905 and is mounted in the bearing housing 3 via a suitable bearing arrangement. A disk arrangement 4 of multi-layer design is clamped in place between the bearing housing 3 and a cartridge K which is formed by a VTG disk 12 having an axial stop 14 and a vane ring 15 and is arranged in the turbine housing 2 in an axially displaceable manner. Here, in the example, there are two material layers 5 and 6, which are explained in more detail below with reference to fig. 2. Fig. 1 illustrates the disk arrangement 4 between the turbine housing 2 and the bearing housing 3, two supporting regions 10, 11 being obtained, with which the material layer or disk spring 5, as can be seen in detail from fig. 1, is supported on the corresponding parts of the vane ring of the cartridge of the variable turbine geometry of the bearing housing 3. The material layer or the inner heat shield 6 is clamped in place at the outside diameter by the disk spring 5 relative to the vane ring 15. An embodiment of the disk arrangement 4 according to the invention is shown in fig. 2. In this embodiment, the two material layers 5 and 6 are of two-piece design. Fig. 2 illustrates that the material layer or disk spring 5, which applies the axial preloading force, has a conical configuration. Furthermore, the material layer 5 has a center aperture 16, which is arranged coaxially to a center aperture 17 of the material layer 6, serving as heat shield for the material layer 5, and has an equally large diameter. Provided between the material layers 5 and 6 is an air gap 7, which further improves the heat insulation properties. This air gap 7 is achieved by the WO 2006/133793 - 5 - PCT/EP2006/004905 provision of a bend 8 in the heat shield 6, which divides the latter into two regions 9, 9' , which are preferably arranged at an obtuse angle to one another. WO 2006/133793 - 6 - PCT/EP2006/004905 List of designations 1 Turbocharger/exhaust gas turbocharger 2 Turbine housing 3 Bearing housing 4 Disk arrangement 5, 6 Material layers (5: disk spring for preloading; 6: heat protection layer for layer 5 without abutment/contact at the bearing housing) 7 Air gap at the inside diameter between 5 and 6 8 Bend 9, 9' Regions of the heat shield 6 10, 11 Abutment regions 12 VTG disk 14 Axial stop 15 Vane ring 16, 17 Center apertures of 5 and 6, respectively W Shaft K Cartridge for the variable turbine geometry M Center line WO 2006/133793 - 7 - PCT/EP2006/004905 Claims 1. Turbocharger (1) - having a turbine housing (2) of a turbine wheel; - having a cartridge (K) arranged in the turbine housing (2) for the variable turbine geometry; - having a bearing housing (3) which is arranged between the turbine housing (2) and a compressor housing of a compressor wheel and in which a bearing arrangement for a shaft (W) carrying the turbine wheel and the compressor wheel is arranged; and - having a disk arrangement (4) which is arranged between the cartridge (K) and the bearing housing (3); characterized in that - the disk arrangement (4) is composed of at least two material layers (5, 6), - an air gap (7) is arranged between the material layers (5, 6) , - the one material layer (5) is designed as a conical disk, and - the other material layer (6) is provided with a bend (8) . 2. The turbocharger as claimed in claim 1, characterized in that the material layers (5, 6) have center apertures (16 and 17 resp.) having the same diameter. 3. The turbocharger as claimed in claim 1 or 2, characterized in that the material layers (5, 6) have the same diameter. 4. The turbocharger as claimed in one of claims 1 to 3, characterized in that only the conical material layer (5) WO 2006/133793 - 8 - PCT/EP2006/004905 abuts at its the inside diameter against the bearing housing (3) . 5. The turbocharger as claimed in one of claims 1 to 4, characterized in that the material layers (5, 6) are separate parts. 6. The turbocharger as claimed in one of claims 1 to 5, characterized in that the material layer (6) is axially restrained in the region of its outside diameter by the material layer (5). 7. The turbocharger as claimed in one of claims 1 to 6, characterized in that the material layers (5, 6) are made of the same material. 8. The turbocharger as claimed in one of claims 1 to 6, characterized in that the material layers (5, 6) are made of different materials. 9. The turbocharger as claimed in one of claims 1 to 8, characterized in that the material layer (6) provided with a bend constitutes a thermal insulation or an inner heat shield for the other material layer (5) forming an outer disk spring. 10. A disk arrangement (4) for a turbocharger (1) according to the preamble of claim 1, characterized by at least one of the characterizing features of claims 1 to 3. The invention relates to a turbocharger (1) provided with a turbine housing (2) for turbine wheels, a cartridge (K) for the variable turbine geometry positioned in the turbine housing (2), a bearing housing (3) which is arranged between said turbine housing (2) and a compressor housing of the compressor wheel and in which a bearing arrangement for a shaft (W) carrying the turbine and compressor wheels is mounted and a pane system (4) placed between the cartridge (K) and the bearing housing (3). The inventive turbocharger is characterized in that said pane system (4) consists of at least two material layers (5,6), an air gap (7) is formed between the material layers (5,6), the material layer (5) is embodied in the form of a conical plate and the other material layer (6) is provided with a bend (8). |
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| Patent Number | 279967 | |||||||||
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| Indian Patent Application Number | 4693/KOLNP/2007 | |||||||||
| PG Journal Number | 06/2017 | |||||||||
| Publication Date | 10-Feb-2017 | |||||||||
| Grant Date | 06-Feb-2017 | |||||||||
| Date of Filing | 04-Dec-2007 | |||||||||
| Name of Patentee | BORG WARNER INC. | |||||||||
| Applicant Address | 3850 HAMLIN ROAD AUBURN HILLS, MI | |||||||||
Inventors:
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| PCT International Classification Number | F01D 17/14,F16F 1/32 | |||||||||
| PCT International Application Number | PCT/EP2006/004905 | |||||||||
| PCT International Filing date | 2006-05-23 | |||||||||
PCT Conventions:
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