CN216642571U

CN216642571U - Pressure shell sealing structure of turbocharger

Info

Publication number: CN216642571U
Application number: CN202123429222.XU
Authority: CN
Inventors: 顾伟; 杨帆; 顾润沺
Original assignee: Scm Advanced Material Tech Co ltd
Current assignee: Scm Advanced Material Tech Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-31
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a sealing structure of a pressure shell of a turbocharger, which comprises the pressure shell and a plastic part, wherein the pressure shell is provided with a sealing groove; the pressing shell is provided with a cavity for accommodating the pressing wheel, the pressing shell comprises a sealing end, the sealing end is positioned on one side of the cavity, and a groove is formed in the side wall of the sealing end; the working of plastics injection moulding sets up sealed serving is last, the working of plastics certainly sealed end extends to in the cavity, the working of plastics covers completely sealed end, just the working of plastics with the cooperation of recess joint. According to the utility model, the special plastic layer is injection-molded on the pressure shell, and then the injection-molded plastic piece is mechanically processed, so that the plastic piece is beneficial to reducing the sealing gap between the pressing wheel and the pressure shell, thereby being beneficial to ensuring the matching precision of the pressure shell and the pressing wheel, being beneficial to protecting the pressing wheel from being damaged, further being beneficial to improving the working efficiency of the turbocharger and being beneficial to saving energy consumption.

Description

Pressure shell sealing structure of turbocharger

Technical Field

The utility model relates to the technical field of engines, in particular to a pressure shell sealing structure of a turbocharger.

Background

Because metal parts are arranged between the pressure shell and the pressure wheel of the engine turbocharger, a certain safety clearance must be ensured in order to ensure that the pressure wheel and the pressure shell do not collide; resulting in some loss of turbocharger efficiency; the oil consumption of the engine is increased.

The prior Chinese patent with publication number CN214945217U discloses a turbocharger pressure shell sealing structure and a turbocharger, and the turbocharger comprises a supercharger shell, a pressure wheel and a sealing assembly, wherein the sealing assembly comprises an aluminum insert and a plastic piece; the aluminum insert sets up the pinch roller with between the booster casing, the working of plastics injection moulding sets up on the aluminum insert.

The inventors have recognized that there are improvements in the prior art seal arrangements that require a more rational arrangement.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the utility model aims to provide a pressure shell sealing structure of a turbocharger.

The utility model provides a turbocharger pressure shell sealing structure, which comprises a pressure shell and a plastic part, wherein the pressure shell is provided with a sealing groove; the pressing shell is provided with a cavity for accommodating the pressing wheel, the pressing shell comprises a sealing end, the sealing end is positioned at one side of the cavity, and a groove is formed in the side wall of the sealing end; the working of plastics injection moulding sets up sealed serving is last, the working of plastics certainly sealed end extends to in the cavity, the working of plastics covers completely sealed end, just the working of plastics with the cooperation of recess joint.

Preferably, the sealing end comprises a straight cylinder section and an expansion section, and the cross-sectional dimension of the sealing end gradually enlarges outwards from the inside of the pressure shell.

Preferably, the groove comprises a first groove, a second groove and a third groove, and the first groove, the second groove and the third groove are sequentially arranged from the expansion section of the sealing end to the straight cylinder section.

Preferably, the first groove is provided at an expansion section of the sealing end; the first groove extends inwards from the surface of the sealing end and is gradually increased.

Preferably, the second groove is provided at any position on the sealing end between the first groove and the third groove.

Preferably, the second grooves comprise a plurality of grooves arranged in parallel.

Preferably, the third groove is arranged on one side, far away from the expansion section, of the straight cylinder section of the sealing end; the cross-sectional dimension of the third groove is larger than that of the second groove on the straight cylinder section of the sealing end.

Preferably, a cross section of the second groove and the third groove in a vertical direction includes a rectangle.

Preferably, the plastic part comprises any one of a modified polyetheretherketone PEEK part, a thermoplastic polyimide TPI part, a polyphenylene sulfide PPS part, a polyetherimide PEI part, and a polyethersulfone PES part.

Preferably, a protrusion is arranged inside the groove, and the protrusion does not extend out of the groove.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the special plastic layer is injection-molded on the pressure shell, and then the injection-molded plastic piece is mechanically processed, so that the plastic piece is beneficial to reducing the sealing gap between the pressing wheel and the pressure shell, thereby being beneficial to ensuring the matching precision of the pressure shell and the pressing wheel, being beneficial to protecting the pressing wheel from being damaged, further being beneficial to improving the working efficiency of the turbocharger and being beneficial to saving energy consumption.

2. According to the utility model, the plastic piece is made of special high-performance material, so that the turbocharger is beneficial to the application occasions of high temperature or low temperature, and the applicability of the turbocharger is improved.

3. The utility model is favorable for improving the production efficiency of the turbocharger pressure shell by adopting injection molding of plastic parts.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic view of the overall structure of a pressure shell sealing structure of a turbocharger, which mainly embodies the utility model.

Reference numerals:

pressure shell 1 plastic part 2 sealing end 3

First recess 31, second recess 32 and third recess 33

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

As shown in fig. 1, the turbocharger pressure shell sealing structure provided by the utility model comprises a pressure shell 1 and a plastic part 2; the pressing shell 1 is provided with a cavity for accommodating the pressing wheel, the pressing shell 1 comprises a sealing end 3, the sealing end 3 is positioned at one side of the cavity, and a groove is formed in the side wall of the sealing end 3; 2 injection moulding of working of plastics sets up on sealed end 3, and in the working of plastics 2 extended to the cavity from sealed end 3, the working of plastics 2 covered sealed end 3 completely, and working of plastics 2 and recess joint cooperation.

The plastic part 2 comprises a specially tailored plastic and the press shell 1 comprises an aluminum machined press shell. A special plastic layer is injected on the pressure shell 1, and then the injection-molded plastic part 2 is mechanically processed, so that the matching precision of the pressure shell 1 and the pinch roller is ensured. During installation, the plastic part 2 can protect the press wheel from being damaged even if the press shell 1 is in an extreme condition. The plastic part 2 can greatly reduce the sealing clearance between the pressing wheel and the pressing shell 1, thereby improving the efficiency of the turbocharger, and achieving the functions of saving energy consumption and improving efficiency. Meanwhile, due to the reduction of the installation clearance, the vibration of the pinch roller is smaller and the noise is lower when the pinch roller rotates at a high speed. And, the plastic part 2 adopts injection moulding, can satisfy large batch production.

The sealing end 3 comprises a straight cylinder section and an expansion section, and the section size of the sealing end 3 is gradually enlarged from the inside of the pressure shell 1 to the outside. The grooves comprise a first groove 31, a second groove 32 and a third groove 33, and the first groove 31, the second groove 32 and the third groove 33 are sequentially arranged from the expansion section of the self-sealing end 3 to the straight cylinder section. The groove can increase the binding force between the press shell 1 and the plastic part 2.

Furthermore, the inside of the groove is provided with a bulge which does not extend out of the groove. The protrusions can further stabilize the coupling force between the press case 1 and the plastic member 2. Meanwhile, the protrusion can also prevent the plastic part 2 and the pressing shell 1 from rotating.

The first groove 31 is provided at an expansion section of the sealing end 3, and the first groove 31 extends inward from the surface of the sealing end 3 and gradually increases. The second groove 32 is provided at any position on the sealing end 3 between the first groove 31 and the third groove 33. Preferably, the second groove 32 is provided on a straight section of the sealing end 3. The third groove 33 is arranged on one side of the straight cylinder section of the sealing end 3 far away from the expanding section, and the cross-sectional dimension of the third groove 33 is larger than that of the second groove 32. The cross section in the vertical direction of the second groove 32 and the third groove 33 includes a rectangle.

The plastic part 2 comprises any one of a modified polyetheretherketone PEEK part, a thermoplastic polyimide TPI part, a polyphenylene sulfide PPS part, a polyetherimide PEI part and a polyethersulfone PES part. The plastic part 2 is made of special high-performance materials, so that the application occasions that the turbocharger is at high temperature or low temperature are met, and the applicability of the turbocharger is improved. The strength of the plastic part 2 is far lower than that of the aluminum pinch roller, and under extreme conditions, the pinch roller is protected from being damaged.

By means of injection molding, special high-performance materials are injected into the cavity of the press shell 1 to form the plastic part 2. And then removing the injection molding sprue by means of machining. According to the contour requirement of a pressure wheel blade of a turbocharger, redundant plastic parts are machined, and the gap between a pressure shell 1 and a pressure wheel is ensured to be 0mm to 0.3 mm. The plastic part 2 can reduce the gap between the pressing shell 1 and the pressing wheel, so that the required installation gap is achieved, and the working efficiency of the turbocharger is improved.

The expansion coefficient of the plastic part 2 is consistent with that of aluminum between minus 60 ℃ and 230 ℃, so that the installation clearance between the plastic part 2 and the pinch roller is kept unchanged at different temperatures, and a small clearance between the pinch roller and the plastic part 2 can be kept, thereby improving the efficiency of the turbocharger and reducing the oil consumption of an engine.

In the application, the plastic part 2 made of the TPI special material is taken as an example, and in order to meet the sealing structure of the pressure shell of the turbocharger, the specific implementation mode is as follows:

the first step is as follows: pouring (or machining) aluminum into the press shell 1 with the groove;

the second step is that: preheating the pressure shell 1 to 200-250 ℃ in an oven;

the third step: the pressure shell 1 is placed into a mold for injection molding, and the sealing structure of the pressure shell of the turbocharger is formed by injection molding;

the injection molding process comprises the following steps:

temperature of the die: 200-250 ℃;

injection molding temperature of the injection molding machine:

a first stage: 350-420 ℃;

and a second stage: 350-420 ℃;

a third stage: 350-420 ℃;

a nozzle: 350-420 ℃;

injection molding pressure: 50MPa to 120 MPa;

the fourth step: removing a pouring gate and burrs of injection molding;

the fifth step: and (4) processing the plastic part 2 to meet the precision requirement of matching with the plastic part according to the shape and the precision of the pinch roller impeller.

We can obtain a turbocharger pressure shell with a pressure shell seal.

The pressure shell sealing structure can improve the fuel efficiency of the engine by 2 to 3 percent; the fuel can be widely applied to aircraft engines, automobile engines, hydrogen fuel and other novel engines.

Principle of operation

The pressure shell 1 is provided with a plurality of grooves, the plastic part 2 is arranged on the pressure shell 1 in an injection molding mode, the plastic part 2 extends to the cavity from the grooves, and the plastic part 2 is clamped and matched with the grooves. The plastic part 2 can greatly reduce the sealing clearance between the pressing wheel and the pressing shell 1, thereby improving the efficiency of the turbocharger, and achieving the functions of saving energy consumption and improving efficiency.

Variation example

Based on the basic embodiment, the second groove 32 comprises a plurality of grooves arranged in parallel. The cohesion between shell 1 and the working of plastics 2 is pressed in the increase that multichannel recess can be better, promotes the work efficiency of working of plastics 2.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "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 only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A turbocharger pressure shell sealing structure is characterized by comprising a pressure shell (1) and a plastic piece (2);

the pressing shell (1) is provided with a cavity for accommodating the pressing wheel, the pressing shell (1) comprises a sealing end (3), the sealing end (3) is positioned on one side of the cavity, and a groove is formed in the side wall of the sealing end (3);

working of plastics (2) injection moulding sets up on sealed end (3), working of plastics (2) certainly sealed end (3) extend to in the cavity, working of plastics (2) cover completely sealed end (3), just working of plastics (2) with the cooperation of recess joint.

2. The turbocharger pressure casing sealing structure according to claim 1, wherein the sealing end (3) comprises a straight cylindrical section and an expanding section, and the cross-sectional dimension of the sealing end (3) is gradually enlarged from the inside of the pressure casing (1) to the outside.

3. The turbocharger pressure casing seal structure according to claim 2, wherein the grooves include a first groove (31), a second groove (32), and a third groove (33), and the first groove (31), the second groove (32), and the third groove (33) are provided in this order from an expanded section to a straight section of the seal end (3).

4. A turbocharger gland seal structure according to claim 3, wherein said first groove (31) is provided at an expanding section of said seal end (3);

the first groove (31) extends inwards from the surface of the sealing end (3) and is gradually increased.

5. A turbocharger pressure casing sealing structure according to claim 3, characterised in that the second groove (32) is provided at any position on the sealing end (3) between the first groove (31) and the third groove (33).

6. A turbocharger pressure casing seal arrangement according to claim 3, characterised in that said second groove (32) comprises a plurality of grooves arranged in parallel.

7. A turbocharger pressure casing sealing structure according to claim 3, characterised in that the third groove (33) is provided on the side of the straight cylindrical section of the sealing end (3) remote from the divergent section;

the cross-sectional dimension of the third groove (33) is larger than the cross-sectional dimension of the second groove (32) on the straight cylinder section of the sealing end (3).

8. The turbocharger pressure casing seal structure according to claim 3, wherein the perpendicular-direction cross section of the second groove (32) and the third groove (33) includes a rectangle.

9. The turbocharger gland housing sealing structure according to claim 1, characterized in that said plastic part (2) comprises any one of a modified PEEK part, a TPI part, a PPS part, a PEI part, and a PES part.

10. The turbocharger pressure casing seal structure of claim 1, wherein a protrusion is provided inside the groove, and the protrusion does not extend outside the groove.