CN113137399A

CN113137399A - Turbocharger

Info

Publication number: CN113137399A
Application number: CN202010047423.4A
Authority: CN
Inventors: S·门泽尔
Original assignee: Vitesco Technologies Holding China Co Ltd
Current assignee: Vitesco Technologies Holding China Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2021-07-20

Abstract

A turbocharger includes a first housing and a second housing secured together. The first housing is provided with a first surface facing the second housing, and the second housing is provided with a second surface facing the first housing. The first shell is provided with a protruding portion extending from the first surface to the second shell, when the first shell and the second shell are fixed together, the protruding portion contacts with the second surface and presses the second surface so as to enable the second surface to deform, and the protruding portion and the deformed portion of the second surface are abutted together so as to achieve a sealing effect. The turbocharger provided by the invention has the advantages that the bulge of the first shell is abutted against the second surface of the second shell, and the second surface is extruded and deformed, so that the sealing effect is obtained, and the turbocharger is convenient to mount.

Description

Turbocharger

Technical Field

The present invention relates to a turbocharger.

Background

Chinese patent publication No. CN104302891A discloses a turbocharger, which includes a first housing, a second housing, and a seal ring disposed between the first housing and the second housing. Through setting up the sealing washer to sealed effect has been played. The additional sealing ring is required, thereby increasing the manufacturing cost and increasing the manufacturing difficulty.

Disclosure of Invention

The invention aims to provide a turbocharger which is convenient to assemble and has a sealing effect.

According to one aspect of the present invention, there is provided a turbocharger including a first housing and a second housing fixed together, the first housing being provided with a first surface facing the second housing, the second housing being provided with a second surface facing the first housing. The first shell is provided with a protruding portion extending from the first surface to the second shell, when the first shell and the second shell are fixed together, the protruding portion contacts with the second surface and presses the second surface so as to enable the second surface to deform, and the protruding portion and the deformed portion of the second surface are abutted together so as to achieve a sealing effect.

Preferably, the first housing has a hardness greater than that of the second housing.

Preferably, the protrusion is integrated with the first housing.

Preferably, the first housing is a bearing housing and the second housing is a compressor housing.

Preferably, the first housing is cast iron and the second housing is an aluminum alloy.

Preferably, the projection is annular.

Preferably, the end of the projection is pointed, rounded, square or irregularly shaped.

Preferably, the first shell is further provided with a third surface facing the second shell and parallel to and not coplanar with the first surface, the second shell is provided with a fourth surface facing the first shell and parallel to and not coplanar with the second surface, the third surface and the fourth surface are attached together, and the first surface and the second surface are in clearance fit.

Preferably, the protrusion is located at an end of the first surface near the third surface.

Preferably, the turbocharger is provided with a central shaft, and the first surface and the second surface are respectively perpendicular to the central shaft.

The turbocharger provided by the invention has the advantages that the bulge of the first shell is abutted with the second surface of the second shell, and the second surface is extruded and deformed, so that the sealing effect is obtained, and the turbocharger is convenient to mount.

Drawings

Fig. 1 is a cross-sectional view of a turbocharger of the present invention with the second housing undeformed.

Fig. 2 is a cross-sectional view of the second housing of the turbocharger of the present invention after deformation and before assembly.

Fig. 3 is a sectional view of the second housing of the turbocharger of the present invention after deformation and assembly.

Fig. 4 is a sectional view when the projection is square.

Fig. 5 is a cross-sectional view when the projection is circular.

Detailed Description

Referring to fig. 1 to 3, the present invention provides a turbocharger 100 including a first housing 2 and a second housing 1 fixed together. The first housing 2 is provided with a first surface 22 facing the second housing 1 and the second housing 1 is provided with a second surface 12 facing the first housing 2. The first housing 2 is provided with a projection 23 extending from the first surface 22 toward the second housing 1. When the first shell 2 and the second shell 1 are fixed together, the convex portion 23 contacts with the second surface 12 and presses the second surface 12 to deform the second surface 12, and the convex portion 23 abuts against the deformed portion of the second surface 12 to achieve a sealing effect. Because the second surface 12 of the second housing 1 deforms when being matched with the protruding portion 23, the protruding portion 23 abuts against the deformed portion of the second surface 12, and a good sealing effect can be achieved. The deformation occurs during the assembly of the first housing 2 and the second housing 1, after which the first housing 2 and the second housing 1 can no longer be disassembled, otherwise the sealing function will disappear.

The hardness of the first housing 2 is greater than that of the second housing 1. The first housing 2 is a bearing housing and the second housing 1 is a compressor housing. The second housing 1 is provided with a gas passage 13. This arrangement makes it easier for the second surface 12 to deform when the protrusion 23 abuts against the second surface 12. In another embodiment, the first casing 2 may be a bearing casing and the second casing 1 may be a turbine casing.

The projection 23 is integral with the first housing 2. This structure can be produced directly by machining when the housing is manufactured.

The first shell 2 is cast iron and the second shell 1 is aluminum. The projection 23 is annular. In the present embodiment, the end of the protruding portion 23 is pointed. The pointed arrangement of the end of the projection 23 makes it easier for the projection 23 to project into the interior of the second housing 1.

The first casing 2 is also provided with a third surface 21 facing the second casing 1, parallel and not coplanar with the first surface 22, and the second casing 1 is provided with a fourth surface 11 facing the first casing 2, parallel and not coplanar with the second surface 12. The third surface 21 and the fourth surface 11 are attached together, and the first surface 22 and the second surface 12 are in clearance fit. The third surface 21 and the fourth surface 11 are arranged in a fitting manner, and can play a limiting role in the axial direction L.

The projection 23 is located at an end of the first surface 22 near the third surface 21. The turbocharger 100 has a central axis L, and the first surface 11 and the second surface 1 are perpendicular to the central axis L.

The turbocharger 100 further includes a shaft 5 provided in the second housing 1, a compressor wheel 3 located at one end of the shaft 5, and a turbine wheel 4 located at the other end of the shaft 5. The turbocharger 100 in this embodiment is a conventional exhaust gas-driven turbocharger. The invention may also be used in an electric motor driven turbocharger.

Fig. 4 shows a second embodiment of the invention, which differs from the previous embodiment only in the configuration of the projection 23, which is rounded at its ends. Fig. 5 shows a third embodiment of the present invention, which differs from the above embodiments only in the configuration of the projection 23, which has a square end. The round or square arrangement is not convenient to press into the interior of the second housing 1 in comparison to the pointed arrangement, but it achieves a better sealing effect. In other embodiments, the end of the protrusion 23 may be provided with other irregular shapes.

The protrusion 23 in the drawings of the present invention is only for schematically illustrating the structure of the protrusion 23. In a particular application, the configuration of the protrusion 23 may be adjusted in size according to a particular use.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A turbocharger comprising a first housing (2) and a second housing (1) secured together, the first housing (2) being provided with a first surface (22) facing the second housing (1) and the second housing (1) being provided with a second surface (12) facing the first housing (2), characterised in that the first housing (2) is provided with a projection (23) extending from the first surface (22) towards the second housing (1), when the first housing (2) and the second housing (1) are secured together, the projection (23) and the second surface (12) contact and press against the second surface (12) to deform the second surface (12), the projection (23) and the deformed portion of the second surface (12) abutting together to provide a sealing effect.

2. A turbocharger according to claim 1, wherein the hardness of the first housing (2) is greater than the hardness of the second housing (1).

3. A turbocharger according to claim 1, wherein the projection (23) is integral with the first housing (2).

4. A turbocharger according to claim 1, wherein the first housing (2) is a bearing housing and the second housing (1) is a compressor housing.

5. The turbocharger as in claim 4, characterized in that the first housing (2) is cast iron and the second housing (1) is an aluminum alloy.

6. The turbocharger as claimed in claim 4, characterized in that the projection (23) is annular.

7. The turbocharger as claimed in claim 1, characterized in that the end of the projection (23) is pointed, rounded, squared or irregularly shaped.

8. A turbocharger according to claim 1, wherein the first housing (2) is further provided with a third surface (21) parallel to and non-coplanar with the first surface (22) facing the second housing (1), the second housing (1) is provided with a fourth surface (11) parallel to and non-coplanar with the second surface (12) facing the first housing (2), the third surface (21) and the fourth surface (11) are fitted together, and the first surface (22) and the second surface (12) are in clearance fit.

9. The turbocharger according to claim 8, wherein the protrusion (23) is located at an end of the first surface (22) adjacent to the third surface (21).

10. A turbocharger according to claim 1, wherein the turbocharger is provided with a central axis (L), and the first and second surfaces (11, 1) are perpendicular to the central axis (L), respectively.