CN216975316U

CN216975316U - Turbocharger shell structure, turbocharger and engine assembly

Info

Publication number: CN216975316U
Application number: CN202123242476.0U
Authority: CN
Inventors: 赵培吉; 周仁杰
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-07-15
Anticipated expiration: 2031-12-22

Abstract

The utility model relates to the technical field of vehicles, and particularly discloses a turbocharger shell structure, a turbocharger and an engine assembly. The intermediate body shell is connected between the turbine shell and the compressor shell, a turbine cavity is enclosed between the intermediate body shell and the turbine shell, and a pressurization cavity is enclosed between the intermediate body shell and the compressor shell; the intermediate body housing and the turbine housing are connected by a connecting piece, a pressing force is provided by the connecting piece, and a sealing ring is arranged between the intermediate body housing and the turbine housing, the sealing ring has elasticity and is always in an elastic pressing state, so that when the pressing force between the turbine housing and the intermediate body housing changes, the sealing ring can adapt by elastic deformation, and the sealing performance between the intermediate body housing and the turbine housing can be maintained because the sealing ring is always in the elastic pressing state.

Description

Turbocharger shell structure, turbocharger and engine assembly

Technical Field

The utility model relates to the technical field of vehicles, in particular to a turbocharger shell structure, a turbocharger and an engine assembly.

Background

Turbochargers are a component that is currently widely used on engines. The turbocharger utilizes the inertia impulsive force of the exhaust gas exhausted by the engine to push a turbine in a turbine chamber, the turbine drives a coaxial pressure impeller, and the pressure impeller pumps the air sent by an air filter pipeline, so that the air is pressurized and then enters the cylinder of the engine.

Since the turbocharger is operated in a high temperature environment, the seal between the turbine housing and the intermediate housing is usually formed by clamping the turbine housing and the intermediate housing with a pressure plate and pressing the pressure plate with bolts. However, the bolts are easy to attenuate the axial force in a high-temperature environment, which causes the synchronous attenuation of the pressing force of the pressing plate on the turbine volute and the intermediate shell, reduces the sealing effect of the turbine shell and the intermediate shell, and increases the leakage of the engine exhaust gas.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the utility model provides a turbo charger shell structure, turbo charger and engine assembly to solve the problem that turbine casing and midbody casing's sealed effect is poor among the relevant art.

In one aspect, the present invention provides a turbocharger comprising:

a turbine housing;

a compressor housing;

the intermediate body shell is connected between the turbine shell and the compressor shell, a turbine cavity is enclosed between the intermediate body shell and the turbine shell, and a pressurization cavity is enclosed between the intermediate body shell and the compressor shell;

a coupling for coupling said intermediate body housing and said turbine housing;

the sealing ring has elasticity and is arranged between the intermediate body shell and the turbine shell, and the sealing ring is always in an elastic compression state.

As a preferable technical scheme of the turbocharger shell structure, the sealing ring is made of a metal material.

As a preferred technical solution of the turbocharger housing structure, the seal ring includes a first contact end and a second contact end that are arranged at an interval along an axial direction thereof, and an arc-shaped section that connects the first contact end and the second contact end, and the first contact end and the second contact end are respectively abutted against the intermediate body housing and the turbine housing.

As a preferable technical solution of the turbocharger housing structure, one of the intermediate body housing and the turbine housing is provided with a mounting groove, and the seal ring is located in the mounting groove.

As the preferred technical scheme of the turbocharger shell structure, the turbocharger shell structure further comprises a positioning pin, the turbine shell is provided with a first pin hole, the intermediate shell is provided with a second pin hole, and the positioning pin is inserted into the first pin hole and the second pin hole.

As a preferred technical scheme of the turbocharger housing structure, the number of the positioning pins is multiple, and the plurality of positioning pins are uniformly distributed along the circumferential direction of the intermediate body housing.

As a preferred technical scheme of the turbocharger shell structure, one of the turbine shell and the intermediate shell is provided with a plurality of slots, the other is provided with a plurality of convex columns, and the convex columns are correspondingly spliced with the slots one by one.

As the preferred technical scheme of turbo charger shell structure, the connecting piece includes the clamp, the protruding first flange that is equipped with of turbine casing, the protruding second flange that is equipped with of midbody casing, the clamp cover is located first flange with the second flange just will first flange with the second flange presss from both sides tightly.

In another aspect, the present invention provides a turbocharger including the turbocharger housing structure described in any one of the above aspects, the turbocharger further including:

the intermediate shaft is rotatably arranged on the intermediate body shell;

the compressor impeller is arranged on the intermediate shaft and is positioned in the pressurizing cavity;

and the turbine wheel is arranged on the intermediate shaft and is positioned in the turbine cavity.

In yet another aspect, the present disclosure provides an engine assembly including a turbocharger as in any one of the above aspects.

The utility model has the beneficial effects that:

the utility model provides a turbocharger shell structure, a turbocharger and an engine assembly. The intermediate body shell is connected between the turbine shell and the compressor shell, a turbine cavity is enclosed between the intermediate body shell and the turbine shell, and a pressurization cavity is enclosed between the intermediate body shell and the compressor shell; the intermediate body shell and the turbine shell are connected through a connecting piece, pressing force is provided through the connecting piece, and a sealing ring is arranged between the intermediate body shell and the turbine shell, is elastic and is always in an elastic pressing state, so that when the pressing force between the turbine shell and the intermediate body shell changes, the sealing ring can adapt to the intermediate body shell through elastic deformation, and the sealing performance between the intermediate body shell and the turbine shell can be kept because the sealing ring is always in the elastic pressing state.

Drawings

FIG. 1 is a first schematic structural view of a turbocharger housing according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a second schematic structural view of a turbocharger housing according to an embodiment of the present invention;

fig. 4 is a partially enlarged view of B in fig. 3.

In the figure:

1. a turbine housing; 2. a compressor housing; 3. an intermediate housing; 4. clamping a hoop; 5. a seal ring; 6. positioning pins; 7. an intermediate shaft; 8. an air compressor impeller; 9. a turbine wheel;

11. a first flange; 12. a convex column; 31. a second flange; 32. and (4) a slot.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the prior art, the seal between the turbine casing and the intermediate casing is usually performed by clamping the turbine casing and the intermediate casing with a pressure plate, and pressing the pressure plate with bolts. However, the bolts are easy to attenuate the axial force in a high-temperature environment, which causes the synchronous attenuation of the pressing force of the pressing plate on the turbine volute and the intermediate shell, reduces the sealing effect of the turbine shell and the intermediate shell, and increases the leakage of the engine exhaust gas. In this regard, the present embodiment provides a turbocharger housing structure to enhance the sealing effect between the turbine housing and the intermediate body housing.

Specifically, as shown in fig. 1 to 4, the present embodiment provides a turbocharger housing structure including a turbine housing 1, a compressor housing 2, an intermediate housing 3, a connecting member, and a seal ring 5. The intermediate body shell 3 is connected between the turbine shell 1 and the compressor shell 2, a turbine cavity is defined between the intermediate body shell 3 and the turbine shell 1, and a pressurizing cavity is defined between the intermediate body shell 3 and the compressor shell 2; the intermediate housing 3 and the turbine housing 1 are connected by a connecting piece, which provides the pressing force, and a sealing ring 5 is arranged between the intermediate housing 3 and the turbine housing 1, which sealing ring 5 is elastic and always in an elastic pressing state, so that the sealing ring 5 can adapt by elastic deformation when the pressing force between the turbine housing 1 and the intermediate housing 3 changes, and the sealing performance between the intermediate housing 3 and the turbine housing 1 can be maintained because the sealing ring 5 is always in the elastic pressing state.

Wherein the sealing ring 5 is made of a metallic material. Of course, in other embodiments, the sealing ring 5 may be made of other high temperature resistant non-metallic materials. Preferably, the seal ring 5 comprises first and second contact ends spaced axially therealong and an arcuate segment connecting the first and second contact ends, the first and second contact ends abutting the intermediate body housing 3 and the turbine housing 1, respectively. A line seal is formed between the first contact end and the middle shell 3, a line seal is formed between the second contact end and the turbine shell 1, the arc-shaped section is in an elastic deformation state and can provide elastic force, so that the first contact end is tightly abutted against the middle shell 3, the second contact end is tightly abutted against the turbine shell 1, and the sealing effect is guaranteed. In this embodiment, the arc-shaped segment is C-shaped, and in other embodiments, the arc-shaped segment may also be S-shaped, U-shaped, W-shaped, or the like.

In order to ensure that the installation position of the sealing ring 5 is stable, in this embodiment, the intermediate housing 3 is provided with an installation groove, and the sealing ring 5 is located in the installation groove. In other embodiments, the mounting groove may be disposed on the turbine housing 1.

Optionally, in order to ensure that the relative position between the intermediate housing 3 and the turbine housing 1 is stable without rotation, the turbocharger further comprises a positioning pin 6, the turbine housing 1 is provided with a first pin hole, the intermediate housing 3 is provided with a second pin hole, and the positioning pin 6 is inserted into the first pin hole and the second pin hole. Relative rotation between the intermediate body housing 3 and the turbine housing 1 is avoided by the provision of the locating pin 6. Preferably, the number of the positioning pins 6 is plural, and the plural positioning pins 6 are uniformly distributed in the circumferential direction of the intermediate body housing 3.

As an alternative, as shown in fig. 3 and 4, one of the turbine housing 1 and the intermediate housing 3 is provided with a slot 32, the other is provided with a convex column 12, the convex columns 12 are correspondingly inserted into the slots 32, and the turbine housing 1 and the intermediate housing 3 can be prevented from rotating relatively by inserting the convex columns 12 into the slots 32. In the present embodiment, the protruding columns 12 are disposed on the turbine housing 1 and the inserting slots 32 are disposed on the intermediate housing 3, specifically, the inserting slots 32 are disposed at intervals along the circumferential direction of the intermediate housing 3, and correspondingly, the protruding columns 12 are disposed at intervals along the circumferential direction of the turbine housing 1.

Optionally, the connecting member includes a clamp 4, the turbine housing 1 is provided with a first flange 11 in a protruding manner, the intermediate body housing 3 is provided with a second flange 31 in a protruding manner, and the clamp 4 is sleeved on the first flange 11 and the second flange 31 and clamps the first flange 11 and the second flange 31. By arranging the hoop 4, the hoop 4 can be exposed in the air, and the hoop 4 has a larger outer surface, so that the heat dissipation performance is faster, the heating creep amount is smaller, and the attenuation of the generated pressing force is smaller. The clamp 4 is preferably made of a high-temperature-resistant alloy material. The clamp 4 may comprise a first clamp and a second clamp that are snapped together, and the connector further comprises a bolt and a nut for connecting the first clamp and the second clamp. In other embodiments, the connection elements can also be replaced by screws, by means of which the turbine housing 1 and the intermediate housing 3 are connected.

As shown in fig. 1 and 3, the present embodiment also provides a turbocharger including the turbocharger housing structure in the above aspect. The turbocharger also comprises an intermediate shaft 7, a compressor wheel 8 and a turbine wheel 9. Wherein, the intermediate shaft 7 is rotatably arranged on the intermediate body shell 3; the compressor impeller 8 is arranged on the intermediate shaft 7 and is positioned in the pressurizing cavity; the turbine wheel 9 is mounted on the intermediate shaft 7 and is located in the turbine chamber.

The embodiment also provides an engine assembly comprising the turbocharger in the scheme.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A turbocharger housing structure, comprising:

a turbine housing (1);

a compressor housing (2);

the intermediate body shell (3) is connected between the turbine shell (1) and the compressor shell (2), a turbine cavity is enclosed between the intermediate body shell (3) and the turbine shell (1), and a pressurization cavity is enclosed between the intermediate body shell (3) and the compressor shell (2);

-a connection piece for connecting the intermediate body housing (3) and the turbine housing (1);

the sealing ring (5) is elastic and is arranged between the intermediate body shell (3) and the turbine shell (1), and the sealing ring (5) is always in an elastic compression state.

2. A turbocharger housing structure according to claim 1, characterized in that the sealing ring (5) is made of a metallic material.

3. A turbocharger housing structure according to claim 1, wherein the seal ring (5) comprises first and second contact ends axially spaced apart along the seal ring, and an arcuate section connecting the first and second contact ends, the first and second contact ends abutting the intermediate housing (3) and the turbine housing (1), respectively.

4. A turbocharger housing structure according to claim 1, wherein one of the intermediate body housing (3) and the turbine housing (1) is provided with a mounting groove in which the sealing ring (5) is located.

5. The turbocharger housing structure according to claim 1, further comprising a locating pin (6), wherein the turbine housing (1) is provided with a first pin hole, the intermediate housing (3) is provided with a second pin hole, and the locating pin (6) is plugged into the first pin hole and the second pin hole.

6. The turbocharger housing structure according to claim 5, wherein the number of the positioning pins (6) is plural, and the plural positioning pins (6) are evenly distributed in a circumferential direction of the intermediate body housing (3).

7. The turbocharger housing structure according to claim 1, wherein one of the turbine housing (1) and the intermediate body housing (3) is provided with a plurality of insertion slots (32), and the other is provided with a plurality of bosses (12), and the plurality of bosses (12) are inserted into the plurality of insertion slots (32) in a one-to-one correspondence.

8. The turbocharger housing structure according to claim 1, characterized in that the connecting piece comprises a clamping band (4), the turbine housing (1) is provided with a first flange (11) in a protruding manner, the intermediate body housing (3) is provided with a second flange (31) in a protruding manner, and the clamping band (4) is fitted over the first flange (11) and the second flange (31) and clamps the first flange (11) and the second flange (31) together.

9. A turbocharger comprising the turbocharger housing structure of any one of claims 1 to 8, the turbocharger further comprising:

an intermediate shaft (7) rotatably provided to the intermediate housing (3);

the compressor impeller (8) is arranged on the intermediate shaft (7) and is positioned in the pressurizing cavity;

a turbine wheel (9) mounted to the intermediate shaft (7) and located in the turbine chamber.

10. An engine assembly comprising the turbocharger of claim 9.