CN217327442U

CN217327442U - Turbocharger with improved shaft assembly

Info

Publication number: CN217327442U
Application number: CN202123388434.8U
Authority: CN
Inventors: 刘湘; 徐建辉; 王群; 陈浩
Original assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Current assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-30
Anticipated expiration: 2031-12-30

Abstract

A turbocharger with an improved shaft assembly herein, the turbocharger comprising a compressor assembly, a turbine assembly, a center housing assembly; the compressor assembly is internally provided with a compressor impeller, and the turbine assembly is internally provided with a turbine impeller; the turbocharger is provided with a rotating shaft main body, part of the rotating shaft main body extends into the compressor impeller, a first convex ring and a second convex ring are arranged on the rotating shaft main body of the part, and the outer surfaces of the first convex ring and the second convex ring are planes and keep contact with the inner wall of a hole in the compressor impeller; the main body of the rotating shaft is partially disposed in a bearing, and one end of the main body of the rotating shaft is connected to a turbine wheel. The utility model discloses in, through the design to the pivot form in the booster, improved the elastic property of pivot, strengthened the pivot and offset the ability of atress disturbance, oil storage, lubricated effectual simultaneously has improved the stability of booster operation.

Description

Turbocharger with improved shaft assembly

Technical Field

The utility model belongs to the technical field of turbo charger, concretely relates to turbo charger with improved generation axle subassembly.

Background

The turbocharging technology is widely applied to automobiles, wherein the turbocharger utilizes heat energy, kinetic energy and pressure energy in exhaust gas discharged by an engine during working to push a turbine in a turbine box, the turbine drives a coaxial impeller to form a rotor assembly, and the impeller compresses air sent by an air filter pipeline to enable the air to enter a combustion chamber of the engine after being supercharged. A turbocharger generally includes a turbine, a core part, and a compressor, and as an important device applied to an automobile, reliability, operational stability, and the like of the turbocharger need to be focused.

In the turbocharger, the turbine impeller and the compressor impeller are connected through the rotating shaft to ensure synchronous rotation, and the compressor impeller can be driven to rotate through the rotating shaft when the turbine impeller is driven to rotate by waste gas, so that the air input is increased.

Specifically, in the turbocharger working process, the rotating shaft rotates at a high speed, if the center of gravity of a rotating system has deviation with a rotating axis, the stress of the rotating shaft is unbalanced, the trend of stress bending exists, if a concave region and an annular convex region are arranged on the rotating shaft, the elasticity of the rotating shaft can be properly improved, better elastic restoring force is provided, the disturbance caused by the unbalanced stress is offset, and the operation stability is improved.

In addition, the rotating shaft part is arranged in a lubricating oil system and used for providing oil film lubrication and dynamic pressure oil film support during rotation, and the oil storage amount can be increased by properly arranging the concave area on the rotating shaft, so that the lubricating is facilitated.

Therefore, based on the above situations, the present application provides further design and improvement of the turbocharger.

SUMMERY OF THE UTILITY MODEL

To not enough among the above prior art, the utility model provides a turbo charger with improved generation axle subassembly through the design to the pivot form in the booster, has improved the elastic property of pivot, has strengthened the ability that the atress disturbance was offset in the pivot, and oil storage, lubricated effectual simultaneously have improved the stability of booster operation.

The utility model discloses a following technical scheme can solve.

A turbocharger with an improved shaft assembly herein, the turbocharger comprising a compressor assembly, a turbine assembly, a center housing assembly; the compressor assembly is internally provided with a compressor impeller, and the turbine assembly is internally provided with a turbine impeller; the turbocharger is provided with a rotating shaft main body, part of the rotating shaft main body extends into the compressor impeller, a first protruding ring and a second protruding ring are arranged on the rotating shaft main body of the part of the rotating shaft main body, and the outer surfaces of the first protruding ring and the second protruding ring are planes and are kept in contact with the inner wall of a hole in the compressor impeller; a portion of the shaft body is disposed in the bearing, and one end of the shaft body extends into the turbine wheel.

In a preferred embodiment, the portion of the shaft body disposed in the bearing is provided with a fourth projecting ring and a fifth projecting ring, the outer surfaces of which are flat and are held in contact with the inner wall of the bearing.

The utility model provides a turbocharger, among the axle subassembly, the interval has set up a plurality of bulge loop on the pivot main part, supports, assembles through the surface of bulge loop. Meanwhile, through redesigning the form of the main body of the rotating shaft, the elastic performance of the rotating shaft is improved, and the capability of the rotating shaft for counteracting the stress disturbance is enhanced.

In a preferred embodiment, a third protruding ring is disposed at a position between the second protruding ring and the fourth protruding ring on the rotating shaft main body, and an outer surface of the third protruding ring is a plane and is in contact with an inner wall of the shaft seal sleeve, specifically, the third protruding ring can be assembled by interference fit to keep synchronous rotation.

In a preferred embodiment, the fourth projecting ring has a projecting height greater than the height of the third projecting ring, and the fourth projecting ring abuts against the end face of the shaft sleeve toward the side wall of the shaft sleeve, and is positioned during assembly.

In a preferred embodiment, the length of the third projecting ring is less than the length of the bore in the shaft housing, and the third projecting ring is in contact with a substantially middle section of the inner wall of the shaft housing.

In a preferred embodiment, the first projecting ring is located in the bore of the compressor wheel near the outside; the second bulge loop is located in a position, close to the inner side, in a hole of the compressor impeller, so that balance of supporting force is guaranteed. Further, the length of the first projecting ring is smaller than the length of the second projecting ring. The first bulge loop is relatively far away from the gravity center position, so the first bulge loop can be narrower, and the second bulge loop is at the gravity center position, needs to bear more force and load, is wider, and has stronger supporting force.

In a preferred embodiment, be formed with first sunken position between first bulge loop and the second bulge loop, weight reduction makes whole axle subassembly's focus move to inboard, reduces the unbalanced risk that impeller hole and pivot cylindricity are inconsistent brought simultaneously, is favorable to the force balance when rotating. The fourth bulge loop and the fifth bulge loop are respectively used for supporting two ends of the bearing, and a second sunken position is formed between the fourth bulge loop and the fifth bulge loop and used for storing oil and increasing the amount of lubricating oil.

In a preferred embodiment, the first, second and third projecting rings have substantially the same first projecting height; the fourth and fifth projecting rings have a second projection height that exceeds the first projection height. The structure enables the fourth protruding ring and the fifth protruding ring to be larger and heavier, and the gravity center of the whole shaft assembly is favorably arranged at the center of the supercharger as far as possible, so that the force balance is guaranteed.

In a preferred embodiment, an outer side of the fifth protruding ring of the main body of the rotating shaft is a fitting for fitting a turbine wheel.

In a preferred embodiment, the turbocharger is further provided with a control unit, and the control unit drives the plate to rotate through the connecting rod, so as to drive the waste gate to open and close.

Compared with the prior art, the utility model discloses following beneficial effect has: the turbocharger with the improved shaft assembly is provided, the elastic performance of the rotating shaft is improved through the design of the shape of the rotating shaft in the turbocharger, the capability of the rotating shaft for offsetting stress disturbance is enhanced, meanwhile, the oil storage and lubrication effects are good, and the running stability of the turbocharger is improved.

Drawings

Fig. 1 is a schematic view of a turbocharger according to the present invention.

Fig. 2 is a cross-sectional view of a shaft assembly for use in a turbocharger in accordance with the present invention.

Fig. 3 is an enlarged view of the area a in fig. 2.

Fig. 4 is an enlarged view of the region B in fig. 2.

Fig. 5 is a schematic view of a spindle body and a spindle cover thereon.

Fig. 6 is a sectional view of the region C in fig. 5.

Fig. 7 is a schematic view of the main body of the rotating shaft 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 drawing shows, just for the convenience of description the utility model discloses and 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 expressly specified or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and one of ordinary skill in the art will understand the specific meaning of the terms used in this application as appropriate.

Referring to fig. 1 to 7, fig. 1 is a schematic diagram of a turbocharger of the present application, which includes a compressor assembly 3, a turbine assembly 2, and a center housing assembly 1, and meanwhile, the turbocharger is further provided with a control unit 4, and the control unit 4 drives a plate 51 to rotate through a connecting rod 5, so as to drive a wastegate to open and close.

Referring to fig. 2, the shaft assembly in the turbocharger includes a rotating shaft main body 9 disposed in the turbocharger, a portion of the rotating shaft main body 9 extends into the compressor impeller 98, a first protruding ring 901 and a second protruding ring 902 are disposed on the rotating shaft main body 9 of the portion, outer surfaces of the first protruding ring 901 and the second protruding ring 902 are flat, and are in contact with an inner wall of a hole in the compressor impeller 98, so as to perform assembling and supporting functions, and the rotating shaft main body 9 and the compressor impeller 98 rotate synchronously. The part of the rotating shaft main body 9 is arranged in the bearing 6, a fourth bulge ring 904 and a fifth bulge ring 905 are arranged on the rotating shaft main body 9 of the part, and the outer surfaces of the fourth bulge ring 904 and the fifth bulge ring 905 are flat and are in contact with the inner wall of the bearing 6 for positioning and supporting.

In addition, in this application, a third protruding ring 903 is disposed at a position between the second protruding ring 902 and the fourth protruding ring 904 on the rotating shaft main body 9, an outer surface of the third protruding ring 903 is a plane, and the third protruding ring 903 is in contact with an inner wall of the shaft seal sleeve 95, specifically, the third protruding ring is assembled by interference fit, and keeps rotating synchronously.

As can be seen from fig. 3, in the present application, the first projecting ring 901 is located in the hole of the compressor wheel 98 at a position near the outer side; the second protruding ring 902 is located at a position close to the inner side in the hole of the compressor impeller 98, so as to ensure the balance of the supporting force, and preferably, the second protruding ring 902 is located at the center of gravity of the compressor impeller 98, so that the supporting effect is good, and the stability during rotation is high. The outer side of the compressor wheel 98 is positioned by a nut 91.

And, further, the length of the first projecting ring 901 is smaller than the length of the second projecting ring 902. The first protruding ring 901 is relatively far away from the center of gravity and thus can be narrower, and the second protruding ring 902 is at the center of gravity and needs to bear more force and load, thus being wider and stronger in supporting force. In addition, a first concave position 9a is formed between the first convex ring 901 and the second convex ring 902, so that the weight is reduced, the gravity center of the whole shaft assembly moves towards the inner side, the unbalanced risk caused by the incoordination of the cylindricity of the inner hole of the impeller and the cylindricity of the rotating shaft is reduced, and the force balance during rotation is facilitated.

As can be seen from the drawings, in the present application, the first bulge loop 901, the second bulge loop 902 and the third bulge loop 903 have substantially the same first bulge height; the fourth and

fifth projecting rings

904, 905 have a second projecting height that exceeds the first projecting height. This configuration makes fourth bulge loop 904 and fifth bulge loop 905 bigger, and is heavier, is favorable to the focus of whole axle subassembly to be in the position of the best center of booster as far as possible, guarantees force balance.

As shown in fig. 4, in the present application, the fourth protrusion ring 904 and the fifth protrusion ring 905 are respectively used for supporting two ends of the bearing 6, and a second recess 9b is formed between the fourth protrusion ring 904 and the fifth protrusion ring 905, and is used for storing oil and increasing the amount of lubricating oil.

Further, as can be seen from fig. 6, the projecting height of the fourth projecting ring 904 is larger than that of the third projecting ring 903, and the fourth projecting ring 904 abuts on the end face of the shaft housing 95 toward the side wall 904a of the shaft housing 95, and is positioned at the time of assembly. The length of the third projecting ring 903 is less than the length of the bore in the shaft seal sleeve 95 and the third projecting ring 903 is in contact with a substantially middle section of the inner wall of the shaft seal sleeve 95.

In the present application, the outside of the fifth bulge loop 905 of the main shaft body 9 is a fitting 907 for fitting the turbine wheel 99.

As can be seen from the above description, in the supercharger in the present application, in the shaft assembly, the rotating shaft main body 9 is provided with a plurality of protruding rings at intervals, and the protruding rings are supported and assembled by the outer surfaces of the protruding rings. And simultaneously, the utility model discloses in, through the design to the pivot form in the booster, improved the elasticity performance of pivot, strengthened the pivot and offset the ability of atress disturbance, oil storage, lubricated effectual simultaneously has improved the stability of booster operation.

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 replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.

Claims

1. Turbocharger with improved shaft assembly, comprising a compressor assembly (2), a turbine assembly (3), a central housing assembly (1); a compressor impeller (98) is arranged in the compressor assembly (2), and a turbine impeller (99) is arranged in the turbine assembly (3);

the method is characterized in that:

the turbocharger is provided with a rotating shaft main body (9), a part of the rotating shaft main body (9) extends into the compressor impeller (98), a first protruding ring (901) and a second protruding ring (902) are arranged on the rotating shaft main body (9) of the part, the outer surfaces of the first protruding ring (901) and the second protruding ring (902) are planes, and the first protruding ring (901) and the second protruding ring (902) are in contact with the inner wall of a hole in the compressor impeller (98);

the part of the rotating shaft main body (9) is arranged in the bearing (6), and one end of the rotating shaft main body (9) is connected with the turbine impeller (99).

2. Turbocharger with improved shaft assembly according to claim 1, characterized in that the part of the shaft body (9) placed in the bearing (6) is provided with a fourth (904) and a fifth (905) protruding ring, the outer surface of said fourth (904) and fifth (905) protruding ring being plane and kept in contact with the inner wall of the bearing (6).

3. The turbocharger with the improved shaft assembly according to claim 2, characterized in that a third projecting ring (903) is provided on the shaft body (9) at a position between the second projecting ring (902) and the fourth projecting ring (904), and the outer surface of the third projecting ring (903) is flat and is kept in contact with the inner wall of the shaft seal sleeve (95).

4. The turbocharger with improved shaft assembly according to claim 3, wherein the fourth projecting ring (904) has a projecting height greater than the height of the third projecting ring (903), and the side wall (904 a) of the fourth projecting ring (904) facing the shaft envelope (95) abuts on the end face of the shaft envelope (95).

5. The turbocharger with the improved shaft assembly as in claim 3, wherein the length of the third protruding ring (903) is less than the length of the bore in the shaft envelope (95) and the third protruding ring (903) remains in contact with a substantially middle section of the inner wall of the shaft envelope (95).

6. The turbocharger with improved shaft assembly as set forth in claim 1, wherein said first raised ring (901) is located in the bore of the compressor wheel (98) near the outboard location; the second projecting ring (902) is located in a position near the inner side in the bore of the compressor wheel (98); the length of the first projecting ring (901) is smaller than the length of the second projecting ring (902).

7. The turbocharger with the improved shaft assembly of claim 3, wherein the first raised ring (901), the second raised ring (902), and the third raised ring (903) have substantially the same first raised height; the fourth bulge loop (904) and the fifth bulge loop (905) have a second bulge height that exceeds the first bulge height.

8. The turbocharger with the improved shaft assembly as in claim 1, wherein the outside of the fifth raised ring (905) of the spindle body (9) is a fitting (907) for fitting the turbine wheel (99).

9. The turbocharger with the improved shaft assembly as recited in claim 1, further comprising a control unit (4), wherein the control unit (4) drives the plate (51) to rotate through the connecting rod (5), and further drives the opening and closing of the waste gate.