CN218817214U

CN218817214U - Supercharger air inlet backflow structure with low-cost assembly structure

Info

Publication number: CN218817214U
Application number: CN202222660444.0U
Authority: CN
Inventors: 潘张光; 李英旭; 沃鸣杰; 俞海蛟
Original assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Current assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-04-07
Anticipated expiration: 2032-10-10

Abstract

A supercharger air inlet backflow structure with a low-cost assembly structure comprises a compressor shell, a diffuser plate assembled in the compressor shell, and a pressure end backflow ring assembled in the diffuser plate; a back reflux channel is formed between the inner wall of the pressure expansion plate and the pressure end reflux ring; an interference fit assembly structure is arranged between the compressor shell and the pressure expansion plate; and an interference fit assembly structure is arranged between the pressure expansion plate and the pressure end backflow ring. The supercharger air inlet backflow structure in the application adopts a mode of forming the air inlet backflow structure by adopting split structure assembly, changes the traditional casting type structure, and reduces the process complexity and the cost. The air inlet backflow structure adopts the structure that the pressure expansion plate and the pressure end backflow ring are assembled in the compressor shell in a nested mode, installation parts such as pins are omitted, the assembly process is simple in comparison, the coaxiality is good after assembly, and the product performance is good.

Description

Supercharger air inlet backflow structure with low-cost assembly structure

Technical Field

The utility model belongs to the technical field of turbo charger, concretely relates to booster backflow structure that admits air with low-cost assembly structure.

Background

The turbocharging technology is widely applied to automobiles, wherein the turbocharger utilizes the energy of heat energy, kinetic energy, pressure energy and the like in the exhaust gas discharged by an engine during working to push a turbine in a turbine box, the turbine drives coaxial impellers to form a rotor assembly, and the impellers compress air sent by an air filter pipeline, so that the air enters an engine combustion chamber after being supercharged, and the purpose of turbocharging is achieved.

At present, in a compressor structure of a turbocharger, an air inlet backflow structure is used more and more, because the air inlet backflow structure can improve the surge margin and the compressor efficiency of the turbocharger and can also improve Hiss noise, the practicability is high. However, the production and assembly processes have some defects, such as: the large-scale turbocharger air inlet backflow structure adopts a casting type, so that the universality is poor, the casting process is complex, and the cost is high; the air inlet backflow structure of the small turbocharger adopts a pin fixing type, the coaxiality between the air inlet backflow structure and the compressor shell is poor, the pins are required to be assembled and beaten after assembly, and the assembly process is complex; in addition, the diffuser plate R arc is also extruded eccentrically and the like due to the adoption of liquid nitrogen cold charging, and the assembly cost is high. The above problems limit the wider use and popularization of the intake air backflow structure from the aspects of economic cost and functional practicability.

Therefore, based on some current situations, the application provides further design and improvement on an intake air backflow structure in the turbocharger.

SUMMERY OF THE UTILITY MODEL

To not enough among the above prior art, the utility model provides a supercharger backflow structure that admits air with low-cost assembly structure through the design to the backflow structure that admits air wherein, makes its convenient assembling, and is with low costs, and equipment back structural strength is high, and the concentricity is good, long service life.

The utility model discloses a following technical scheme can solve.

A supercharger air inlet backflow structure with a low-cost assembly structure comprises a compressor shell, a diffuser plate assembled in the compressor shell, and a pressure end backflow ring assembled in the diffuser plate; a back reflux channel is formed between the inner wall of the pressure expansion plate and the pressure end reflux ring; an interference fit assembly structure is arranged between the compressor shell and the pressure expansion plate; and an interference fit assembly structure is arranged between the pressure expansion plate and the pressure end backflow ring.

The supercharger inlet reflux structure in this application has adopted the mode that components of a whole that can function independently structural assembly constitutes inlet reflux structure, has changed traditional casting formula structure, has reduced technology complexity and cost. The air inlet backflow structure has the advantages that the structure that the pressure expansion plate and the pressure end backflow ring are assembled in the compressor shell in a nested mode is adopted, installation parts such as pins are omitted, the assembly process is simple in comparison, the coaxiality is good after assembly, and the product performance is good.

In a preferred embodiment, a pressure expansion plate assembly cavity is arranged in the compressor housing, the inner wall of the assembly cavity on the pressure expansion plate assembly cavity and the outer wall of the pressure expansion plate on the pressure expansion plate are in interference fit assembly structures matched with each other, the assembly is convenient, the stability after assembly is good, and the structural strength is high.

In a preferred embodiment, a positioning step is arranged on the diffuser plate assembling cavity, and in the assembling process, the diffuser plate is pressed against the positioning step to indicate that the diffuser plate is assembled in place.

In a preferred embodiment, the positioning steps include a first positioning step and a second positioning step, the first positioning step abuts against the inner end surface of the pressure expansion plate to perform positioning, and the second positioning step abuts against the convex edge on the pressure expansion plate to perform positioning. The structure ensures high positioning strength and good stability.

In a preferred embodiment, the outer wall of the pressure end backflow ring is provided with an airflow guide sheet for guiding airflow to generate a pre-rotation effect; the periphery of the airflow guide piece and the inner wall of the pressure expansion plate are of interference fit assembly structures matched with each other, and the strength is high after assembly.

In a preferred embodiment, a convex arc-shaped transition structure is arranged on the inner end surface of the pressure end backflow ring, and an arc-shaped retraction structure is arranged at a corresponding position on the compressor housing; an arc-shaped air passage is formed between the arc-shaped transition structure and the arc-shaped retraction structure, the air passage forms a part of the backflow channel, and the air inlet backflow effect of the whole backflow channel is good.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides a supercharger backflow structure that admits air with low-cost assembly structure, through the design to wherein the backflow structure that admits air, make its convenient assembling, with low costs, the post-assembly structural strength is high, and the concentricity is good, long service life.

Drawings

Fig. 1 is a cross-sectional view of an air inlet backflow structure according to the present invention.

Fig. 2 is a sectional view of the compressor housing of the present invention.

Fig. 3 is an enlarged view of the air inlet backflow structure of the present invention.

Fig. 4 is a cross-sectional view of the diffuser plate and the pressure end return ring of the present invention assembled together.

Fig. 5 is a sectional view showing the state where the pressure expansion plate and the pressure end return ring are separated.

Fig. 6 is a schematic view of an assembly state of the air inlet/return structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

In the description of the present invention, it is to be understood that the term: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the figure shows, just for the convenience of description the utility model discloses and the simplified description, consequently can not be understood as the restriction of the utility model. 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 shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1 to 6, a supercharger intake backflow structure with a low-cost assembly structure according to the present invention includes a compressor housing 1, a diffuser plate 2 assembled in the compressor housing 1, and a pressure end backflow ring 3 assembled in the diffuser plate 2; a back reflux channel 6 is formed between the inner wall of the pressure expansion plate 2 and the pressure end reflux ring 3; an interference fit assembly structure is arranged between the compressor shell 1 and the pressure expansion plate 2; and an interference fit assembly structure is arranged between the pressure expansion plate 2 and the pressure end backflow ring 3.

Specifically, can see from fig. 1 to 2 that in this application, be equipped with in the compressor housing 1 and expand the clamp plate assembly chamber, expand assembly intracavity wall 12 on the clamp plate assembly chamber with expand clamp plate outer wall 22 on the clamp plate 2 for the interference fit assembly structure that matches each other, convenient assembling, the post-assembly stability is good, and structural strength is high. And a positioning step is arranged on the pressure expansion plate assembly cavity, and in the assembly process, the pressure expansion plate 2 is abutted to the positioning step to indicate that the assembly is in place. Specifically, the positioning steps include a first positioning step 11 and a second positioning step 13, the first positioning step 11 abuts against an inner end face 21 of the pressure expansion plate 2 for positioning, and the second positioning step 13 abuts against a convex edge 25 on the pressure expansion plate 2 for positioning. The structure ensures high positioning strength and good stability.

In addition, as can be seen from fig. 4 and 5, in the present application, the outer wall of the pressure end backflow ring 3 is provided with an airflow guide plate 31 for guiding the airflow to generate a pre-swirl effect; the periphery of the airflow guide piece 31 and the inner wall 23 of the diffuser plate 2 are in an interference fit assembly structure matched with each other, and the strength is high after assembly. In addition, in the present application, a convex arc-shaped transition structure 32 is arranged on the inner end surface of the pressure end backflow ring 3, and an arc-shaped retraction structure 18 is arranged at a corresponding position on the compressor housing 1; an arc-shaped air passage is formed between the arc-shaped transition structure 32 and the arc-shaped retraction structure 18, and the air passage forms a part of the backflow channel 6, so that the air inlet backflow effect of the whole backflow channel 6 is good.

The supercharger inlet reflux structure in this application has adopted the mode that components of a whole that can function independently structural assembly constitutes inlet reflux structure, has changed traditional casting formula structure, has reduced technology complexity and cost. The air inlet backflow structure has the advantages that the diffuser plate 2 and the pressure end backflow ring 3 are embedded and assembled in the compressor shell 1, mounting parts such as pins are omitted, the assembling process is simple, the coaxiality is good after assembly, and the product performance is good.

Referring to fig. 6, the structure and assembly steps of the intake air recirculation structure in the present application will be described in detail. In the present application: the air inlet backflow structure is of a split structure and comprises a pressure end backflow ring, a pressure expansion plate and a compressor shell, wherein the pressure end backflow ring 3 and the pressure expansion plate 2 are assembled in an interference fit mode, and the pressure expansion plate 2 and the compressor shell 1 are assembled in an interference fit mode.

The specific method comprises the following steps: (1) assembling method of the pressure end backflow ring 3 and the diffuser plate 2: through heating diffuser plate 2, enlarge diffuser plate 2 hole, then pack into diffuser plate 2 with pressure end return ring 3, through the axial positioning pressure end return ring 3's of little step in the diffuser plate hole axial position (diffuser plate 2 simple structure, heat transfer is very fast in the hole). (2) A press end return ring assembly and a compressor housing 1 assembly method (due to the compressor housing structure, heat for heating the compressor housing is slowly transferred into an inner hole, so a press fitting process is adopted): the inlet of the compressor shell 1 is placed downwards on the centering tool 52, the centering tool 52 and the pressing plate tool 53 need to be concentric, the pressing end backflow ring assembly (the pressing end backflow ring 3 and the diffusion plate 2 are called as the pressing end backflow ring assembly after hot loading) is placed in an inner hole of the compressor shell 1, the upper end of the pressing plate tool 53 is connected to a press through bolts, the pressing end backflow ring assembly is assembled into the compressor shell 1 through controlling the stroke and the pressing force of the press, and the level of the diffusion surface of the compressor shell 1 and the upper surface of the diffusion plate 2 is guaranteed.

In the assembling method, the working principle of the hot charging process is that the hot expansion and cold contraction (the compressor casing, the pressure expansion plate and the pressure end return ring are made of the same material, such as cast aluminum ZA 101A), the inner hole of the pressure expansion plate is expanded by heating and then is installed into the pressure end return ring, and the pressure end return ring is cooled to ensure that the pressure end return ring does not move or rotate axially and radially through interference magnitude. The press mounting process has the working principle that: cast aluminium ZA101A material is softer, as long as lead positive rational in infrastructure, presses the end return ring subassembly and can be in the same place with compressor shell meshing in-process of impressing, guarantees to press end return ring subassembly can not axial displacement or radial rotation in the in-service use.

More than, the utility model provides a booster backflow structure that admits air with low-cost assembly structure through the design to the backflow structure that admits air wherein, makes its convenient assembling, and is with low costs, and the post assembling structural strength is high, and the concentricity is good, long service life.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any substitutions, modifications, and improvements that can be easily conceived by those skilled in the art are all within the protection scope of the present invention.

Claims

1. The supercharger air inlet backflow structure with the low-cost assembly structure is characterized by comprising a compressor shell (1), a diffuser plate (2) assembled in the compressor shell (1), and a pressure end backflow ring (3) assembled in the diffuser plate (2);

a back reflux channel (6) is formed between the inner wall of the pressure expansion plate (2) and the pressure end reflux ring (3);

the compressor shell (1) and the pressure expansion plate (2) are in an interference fit assembly structure;

and an interference fit assembly structure is arranged between the pressure expansion plate (2) and the pressure end backflow ring (3).

2. The supercharger intake air backflow structure with the low-cost assembly structure according to claim 1, wherein a diffuser plate assembly cavity is arranged in the compressor housing (1), and an assembly cavity inner wall (12) on the diffuser plate assembly cavity and a diffuser plate outer wall (22) on the diffuser plate (2) are in an interference fit assembly structure matched with each other.

3. The intake air recirculation structure of a supercharger having a low-cost assembly structure as claimed in claim 2, wherein said diffuser plate assembly chamber is provided with a positioning step.

4. The supercharger intake air backflow structure with the low-cost assembly structure according to claim 3, wherein the positioning steps comprise a first positioning step (11) and a second positioning step (13), the first positioning step (11) is positioned against the inner end surface (21) of the diffuser plate (2), and the second positioning step (13) is positioned against a convex edge (25) on the diffuser plate (2).

5. The supercharger intake air backflow structure with the low-cost assembly structure according to claim 1, wherein an airflow guide sheet (31) is arranged on the outer wall of the pressure end backflow ring (3), and the periphery of the airflow guide sheet (31) and the diffuser inner wall (23) of the diffuser plate (2) are in an interference fit assembly structure matched with each other.

6. The supercharger intake air backflow structure with the low-cost assembly structure according to claim 1, characterized in that the inner end face of the compression end backflow ring (3) is provided with a convex arc-shaped transition structure (32), and an arc-shaped retraction structure (18) is arranged at a corresponding position on the compressor housing (1); the arc transition structure (32) and the arc retraction structure (18) form an arc air channel which forms a part of the backflow channel (6).