CN110821889A

CN110821889A - Split type centrifugal compressor volute structure

Info

Publication number: CN110821889A
Application number: CN201910974199.0A
Authority: CN
Inventors: 刘欣源; 邢卫东; 何海龙; 佟鼎; 侯琳琳; 张子磊; 肖维
Original assignee: China North Engine Research Institute Tianjin
Current assignee: China North Engine Research Institute Tianjin
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-02-21

Abstract

The invention provides a volute structure of a split centrifugal compressor, belonging to the technical field of waste gas turbine increase. Compared with the traditional integrated compressor volute, the compressor volute with a new size can be formed by replacing the shell part or the diffusion part of the volute channel.

Description

Split type centrifugal compressor volute structure

Technical Field

The invention belongs to the technical field of exhaust gas turbocharging, and relates to a volute structure of a split centrifugal compressor.

Background

The performance of the supercharger compressor required for high power density and plateau power recovery of the internal combustion engine is continuously improved and optimized, so that the turbocharger can be well matched with the engine. In the design and optimization process of the compressor, the size parameters of the volute of the compressor are important factors influencing the performance of the compressor. The traditional integrated compressor volute can only be matched with one compressor impeller and one set of compressor interface size. Therefore, in the design and optimization process of the compressor, the performance verification by changing a certain parameter usually needs to be carried out on the whole compressor volute, which wastes time and labor. Therefore, a compressor volute structure is needed, so that the size of the compressor volute can be changed more conveniently.

Disclosure of Invention

The invention aims to solve the problem of providing a split type centrifugal compressor volute structure, so that the split type compressor volute which is convenient to assemble and change replaces the traditional integrated compressor volute, the whole volute can be assembled by volute channel shell parts and diffusion parts with different sizes, and the purpose of conveniently and flexibly controlling the size parameters of the compressor volute is achieved.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a split type centrifugal compressor spiral case structure, includes spiral case passageway shell part and diffusion part, spiral case passageway shell part and diffusion part pass through the fix with screw, and the two junction is provided with the sealing washer, spiral case passageway shell part and diffusion part are the spiral case structure after connecting.

Further, the volute passage housing part comprises a volute passage part and a compressor volute outlet part which are integrally formed, and the diffuser part comprises a compressor volute inlet part and a diffuser part which are integrally formed.

Furthermore, the volute channel part is embedded in the outer side groove of the diffuser part, the upper end of the volute channel part is fixed on a boss of the outer ring of the inlet part of the compressor volute through screws, and the screws are arranged in a plurality and are uniformly distributed around the circumference.

Further, the boss is arranged above the outer side groove, the sealing ring is arranged between the volute channel part and the outer side groove connection part, and the volute channel part is provided with a groove for placing the sealing ring.

Further, the outlet part of the compressor volute is perpendicular to the axis of the inlet part of the compressor volute.

Further, the inlet part of the compressor volute is of a double-layer structure, the volute inlet of the double-layer structure is arranged on one side of the inlet part of the compressor volute, and a gap is formed between the double-layer structures.

Furthermore, the outlet part of the compressor volute is in a conical structure, a volute outlet is formed in one side of the outlet part of the compressor volute, and the outlet side of the volute is the position with the largest inner diameter.

Compared with the prior art, the invention has the following advantages and positive effects.

1. Compared with the traditional integrated compressor volute, the split compressor volute structure can replace the volute channel shell part and the diffusion part, and is convenient for realizing the serialized compressor volute with the same volute channel shell part and different diffusion parts or different volute channel shell parts and the same diffusion part.

2. The volute casing part and the diffusion part are spliced to form a complete casing shape, and the connecting contact surface of the two parts is provided with sealing rubber for preventing air leakage.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram according to an embodiment of the present invention;

FIG. 2 is a schematic view of a volute channel housing portion configuration according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of a diffuser according to an embodiment of the present invention.

Description of reference numerals:

1. a volute channel housing portion; 2. a diffuser section; 3. a screw; 4. a seal ring; 11. a volute channel portion; 12. a gas outlet part of a volute of the gas compressor; 21. an inlet part of a compressor volute; 22. a diffuser section; 221. an outer slot; 211. a boss; 111. and (4) a groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The noun explains:

the diffuser is divided into a volute inlet-diffuser part.

As shown in fig. 1 to 3, a volute structure of a split centrifugal compressor comprises a volute channel casing part 1 and a diffusion part 2, the volute channel casing part 1 and the diffusion part 2 are fixed by a screw 3, a sealing ring 4 is arranged at the joint of the volute channel casing part 1 and the diffusion part 2, the volute channel casing part 1 and the diffusion part 2 are connected to form a volute structure, the volute channel casing part 1 and the diffusion part 2 are replaced, so that the same volute channel casing part 1 and different diffusion parts 2 or the serialized compressor volutes of the different volute channel casing parts 1 and the same diffusion part 2 are conveniently realized, and the sealing rings arranged on the contact surfaces of the volute and the diffusion parts ensure the sealing performance of the volute.

As shown in fig. 2 and 3, the volute passage housing portion 1 includes an integral volute passage portion 11 and compressor volute outlet portion 12, and the diffuser portion 2 includes an integral compressor volute inlet portion 21 and diffuser portion 22.

As shown in fig. 1 and 2, the volute passage portion 11 is embedded in the outer groove 221 of the diffuser portion 22, the upper end of the volute passage portion 11 is fixed on the boss 211 of the outer ring of the compressor volute inlet portion 21 through the screws 3, the screws 3 are arranged in a plurality and are uniformly distributed around the circumference, the volute passage portion 11 is embedded in the diffuser portion 22 first, the connection and the positioning of the volute passage portion and the diffuser portion are realized, and the volute passage portion and the diffuser portion are connected and fixed through the screws.

As shown in fig. 2 and 3, the boss 211 is disposed above the outer groove 221, the sealing ring 4 is disposed between the volute passage portion 11 and the outer groove 221, and the volute passage portion 11 has a groove 111 for placing the sealing ring 4, so as to ensure the sealing performance of the contact surface between the volute passage portion 11 and the outer groove 221.

As shown in fig. 1, the compressor volute outlet portion 12 is disposed perpendicular to the compressor volute inlet portion 21 axis.

As shown in fig. 1 and 2, the compressor volute inlet part 21 is of a double-layer structure, a volute inlet of the double-layer structure is arranged on one side of the compressor volute inlet part 21, and a gap is arranged between the double-layer structure, so that the heat insulation and pressure maintaining effects are achieved.

As shown in fig. 1 and 3, the compressor volute outlet portion 12 is in a conical structure, a volute outlet is arranged on one side of the compressor volute outlet portion 12, and the volute outlet side is the position with the largest inner diameter.

The specific implementation mode is as follows: the split type compressor volute structure mainly comprises a volute channel shell part 1 and a diffusion part 2, wherein the volute channel shell part 1 mainly comprises a volute channel 11 and a compressor volute outlet part 12, the diffusion part 2 mainly comprises a compressor volute inlet part 21 and a diffuser part 22, the two parts are spliced to form a complete volute shape, the two parts are connected through screws 3, and meanwhile, the contact surfaces of the two parts are sealed by sealing rings 4 to prevent air leakage.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a split type centrifugal compressor spiral case structure which characterized in that: the volute passage sealing device comprises a volute passage housing part (1) and a diffusion part (2), wherein the volute passage housing part (1) and the diffusion part (2) are fixed through screws (3), a sealing ring (4) is arranged at the joint of the volute passage housing part and the diffusion part, and the volute passage housing part (1) and the diffusion part (2) are connected and then are in a volute structure.

2. The split centrifugal compressor volute structure of claim 1, wherein: the volute passage shell part (1) comprises a volute passage part (11) and a compressor volute outlet part (12) which are integrally formed, and the diffuser part (2) comprises a compressor volute inlet part (21) and a diffuser part (22) which are integrally formed.

3. The split centrifugal compressor volute structure of claim 2, wherein: the volute channel part (11) is embedded in an outer side groove (221) of the diffuser part (22), the upper end of the volute channel part (11) is fixed on a boss (211) of the outer ring of the compressor volute inlet part (21) through screws (3), and the screws (3) are arranged in a plurality and are uniformly distributed around the circumference.

4. The split centrifugal compressor volute structure of claim 3, wherein: the boss (211) is arranged above the outer side groove (221), the sealing ring (4) is arranged between the volute channel part (11) and the outer side groove (221) in a connecting mode, and the volute channel part (11) is provided with a groove (111) for placing the sealing ring (4).

5. The split centrifugal compressor volute structure of claim 2, wherein: the compressor volute outlet part (12) is perpendicular to the axis of the compressor volute inlet part (21).

6. The split centrifugal compressor volute structure of claim 2, wherein: the compressor volute inlet part (21) is of a double-layer structure, a volute inlet of the double-layer structure is arranged on one side of the compressor volute inlet part (21), and a gap is formed between the double-layer structure.

7. The split centrifugal compressor volute structure of claim 2, wherein: the compressor volute outlet part (12) is of a conical structure, a volute outlet is formed in one side of the compressor volute outlet part (12), and the outlet side of the volute is the position with the largest inner diameter.