An air flow regulating assembly for a nozzle ring, a nozzle ring

Abstract

The utility model relates to nozzle ring technical field especially a kind of air flow adjusting assembly for nozzle ring, a kind of nozzle ring, the air flow adjusting assembly includes blade, riveting piece and fork;The blade includes connecting rod, and blade body and connecting head are respectively fixed in the both ends of connecting rod;The shaft hole is opened in the shaft center of the end of connecting head away from connecting rod;The one end of the fork is opened and has the mounting hole of through, and the inner side wall upper portion of mounting hole is opened and has the tooth slot;The riveting piece includes upper cover and riveting column;The riveting column coaxially passes through upper cover and its outer diameter is less than the outer diameter of upper cover;Connecting head is worn in mounting hole, and the upper end of connecting rod is resisted with the lower end of fork;The riveting column is embedded in shaft hole;The lower end of upper cover is inverted conical structure and its lower end is engaged with the tooth slot of mounting hole after riveting deformation, reliable fixed connection of blade and fork is realized by introducing split riveting piece, welding defect is avoided, and rotation resistance and service life are improved.

Description

Technical Field

[0001] This utility model relates to the field of nozzle ring technology, specifically to an airflow regulating component for a nozzle ring and a nozzle ring. Background Technology

[0002] In the nozzle ring of a turbocharger, the reliability of the connection between the blades and the shift fork directly affects the airflow regulation performance. Existing technologies typically use welding processes (such as TIG welding or laser welding) to connect the blades and shift fork. However, welding requires high precision in component fitting; excessive clearance can lead to poor welding, causing loosening or displacement, reducing reliability and service life. Furthermore, welding processes easily generate weld spatter, causing nozzle ring jamming and failure. Machining the shaft hole also increases manufacturing costs. Although riveting connection solutions exist (such as in prior art CN119686821A), they rely on limiting posts on the shift fork body and the riveting section to directly limit the blade connector. Riveting deformation concentrates in the shift fork material, easily leading to stress concentration or deformation failure under high temperature and high load conditions. Therefore, there is an urgent need for an improved solution that is easy to assemble, has high connection strength, and good fatigue resistance. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this application aims to solve the above-mentioned technical problems and provide an airflow regulating component. By introducing a split riveting component, the blade and the shift fork are reliably fixed together, avoiding welding defects and improving anti-rotation capability and service life.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an airflow regulating assembly for a nozzle ring, comprising blades, riveting components, and a shift fork; the blades include a connecting rod, and blade bodies and connecting heads respectively fixed at both ends of the connecting rod; a shaft hole is provided at the axial center of the end of the connecting head away from the connecting rod; a through mounting hole is provided at one end of the shift fork, and a toothed groove is provided on the upper part of the inner sidewall of the mounting hole; the riveting component includes a top cover and a riveting post; the riveting post coaxially penetrates the top cover and its outer diameter is smaller than the outer diameter of the top cover; the connecting head passes through the mounting hole, and the lower end of the shift fork abuts against the upper end of the connecting rod; the riveting post is embedded in the shaft hole; the lower end of the top cover has an inverted conical structure, and its lower end engages with the toothed groove of the mounting hole after being deformed by riveting.

[0005] Preferably, the lower end of the upper cover has a downward-opening cavity, and the outer diameter of the rivet post is smaller than the inner diameter of the cavity, forming an annular groove; the upper end of the connector head is embedded in the annular groove to form a tight fit.

[0006] Preferably, the mounting hole consists of a coaxially connected conical groove and a through hole, the conical groove being located above the through hole, and the toothed groove being formed on the inner sidewall of the conical groove; the conical groove has an inverted conical structure that matches the lower end of the upper cover.

[0007] Preferably, the connector passes through the through hole and extends into the tapered groove; the cross-sections of the connector and the through hole are matching polygonal structures.

[0008] Preferably, the riveting component is integrally formed.

[0009] Preferably, the blade body is an arc-shaped plate structure, the lower end of the connecting rod is fixedly connected to the middle of one end of the blade body in the width direction, and the outer diameter of the connecting head is smaller than the outer diameter of the connecting rod.

[0010] Preferably, the polygonal structure is hexagonal.

[0011] Preferably, the lower end of the rivet post has a tapered structure with its outer diameter gradually decreasing from top to bottom.

[0012] Preferably, the shaft hole is a blind hole.

[0013] The nozzle ring according to a second aspect embodiment of this application includes the airflow regulating assembly described above.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] As an independent component, the riveted parts share the load, avoiding stress concentration on the shift fork or blade, and improving fatigue resistance under high temperature conditions.

[0016] The top cover engages with the toothed groove to provide mechanical locking, and the tight fit with the annular groove effectively prevents circumferential rotation;

[0017] No precision welding or additional machining is required, reducing production costs and defect rates. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the airflow regulating component of this utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of the shift fork and blade of this utility model.

[0020] Figure 3 This is a schematic diagram of the blade structure of this utility model;

[0021] Figure 4 This is a structural schematic diagram of the riveting component of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the shift fork of this utility model;

[0023] Figure 6 This is a schematic diagram of the nozzle ring of this utility model.

[0024] In the diagram: 1 Blade, 2 Rivet, 3 Shift fork, 4 Shift disc, 5 Mounting disc, 6 Rear cover, 7 Spacer sleeve, 8 Limit pin, 9 Annular air inlet, 11 Blade body, 12 Connecting rod, 13 Connecting head, 14 Shoulder, 131 Shaft hole, 21 Top cover, 22 Rivet post, 23 Annular groove, 31 Conical groove, 32 Through hole. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.

[0026] See Figure 1-5 In one embodiment of this utility model, an airflow regulating component for a nozzle ring is provided. The airflow regulating component is used for the nozzle ring and its core function is to regulate the airflow. It is mainly composed of a blade 1, a riveting member 2, and a shift fork 3. The blade 1 and the shift fork 3 are fixedly connected by the riveting member 2 to form an integral structure.

[0027] The blade 1 is composed of a blade body 11, a connecting rod 12, and a connector 13. The blade body 11 is an arc-shaped plate structure. The lower end of the connecting rod 12 is fixed to the middle of one end of the blade body 11 in the width direction. The connector 13 is coaxially disposed at the upper end of the connecting rod 12. The outer diameter of the connector 13 is smaller than the outer diameter of the connecting rod 12, so that the upper end of the connecting rod 12 and the outer side of the connector 13 form a shoulder 14. The connecting rod 12 can be connected to the shift fork 3 through the riveting piece 2 and the connector 13. A blind hole is provided at the center of the upper end of the connector 13. The blind hole is a shaft hole 131.

[0028] The riveting component 2 is an integrally formed structure, including an upper cover 12 and a riveting post 22. The lower end of the upper cover 12 has a downward-opening cavity. The riveting post 22 coaxially penetrates the upper cover 12 and forms an integral structure with the upper cover 12. The outer diameter of the riveting post 22 is smaller than the inner diameter of the cavity, so that an annular groove 23 is formed between the riveting post 22 and the upper cover 12. In practice, in order to facilitate assembly, the outer diameter of the lower end of the riveting post 22 gradually decreases from top to bottom. The lower end of the upper cover 12 is also tapered.

[0029] One end of the fork 3 has a through mounting hole, which consists of a conical groove 31 and a through hole 32. The conical groove 31 is located on the upper side of the through hole 32. The conical groove 31 is an inverted conical structure that can fit with the lower end of the upper cover 12. The side wall of the conical groove 31 has a toothed groove. The conical groove 31 is coaxial with the through hole 32. The inner diameter of the through hole 32 is adapted to the outer diameter of the connector 13.

[0030] When the blade 1 and the shift fork 3 are assembled into an airflow regulating assembly by means of the riveting component 2, the connector 13 passes through the through hole 32 from bottom to top and extends into the conical groove 31. The lower end of the shift fork 3 abuts against the shoulder 14 to form a preliminary limit. The riveting component 2 is placed on the upper side of the connector 13, and the blade 1, the riveting component 2 and the shift fork 3 are fixedly connected together by the riveting process. During the riveting process, the riveting post 22 is embedded and tightly fixed in the shaft hole 131 of the connector 13 to form a tight fit. During the riveting process, the upper end of the connector 13 is partially embedded and fixed in the annular groove 23 of the riveting component 2 to form a tight fit. It can be understood that the riveting component 2 and the connector 13 are fixed together by an interference fit. At the same time, the lower end of the upper cover 21 undergoes plastic deformation during the riveting process, and its conical structure is embedded and engaged in the tooth groove of the conical groove 31 of the shift fork 3.

[0031] According to the airflow regulating assembly of this application embodiment, the tight fit between the riveting post 22 and the shaft hole 131, and the tight fit between the connector 13 and the annular groove 23, realize the firm connection between the blade 1 and the riveting part 2. After the upper cover 21 is deformed, it meshes with the tooth groove of the conical groove 31, which applies circumferential limit to the connector 13 and effectively prevents the connector 13 from rotating in the through hole 32. This dual (axial and circumferential) fixing mechanism significantly improves the connection strength and stability of the shift fork 3 and the blade 1, greatly reduces the risk of the blade 1 shaking or connection failure relative to the shift fork 3, and the overall assembly process is relatively simple and convenient. The final assembly has high reliability and long service life.

[0032] In one embodiment, to improve assembly efficiency, the connector 13 and the through hole 32 are matched polygons (such as hexagons), which can not only prevent the blade 1 from rotating circumferentially during initial positioning, but also improve the positional accuracy between the fork 3 and the blade 1, thereby enhancing the consistency of the airflow regulating assembly.

[0033] See Figure 6According to a second aspect embodiment of this application, the nozzle ring includes the airflow regulating components described above. The number of airflow regulating components can be multiple, and these multiple airflow regulating components can adjust parameters such as flow velocity, pressure, and direction at the nozzle ring inlet. The nozzle ring further includes: a mounting plate 5, a rear cover 6, a spacer sleeve 7, a limiting pin 8, and a deflector plate 4. The mounting plate 5 and the deflector plate 4 are both annular structures, and the rear cover 6 is a cylindrical structure. The mounting plate 5 and the rear cover 6 are coaxially connected via the spacer sleeve 7. The deflector plate 4 is rotatably connected to the mounting plate 5 away from the axial end face of the rear cover 6 via the limiting pin 8. An annular air inlet 9 is formed between the mounting plate 5 and the rear cover 6. Multiple airflow regulating components are arranged at intervals along the circumferential direction of the mounting plate 5. For each airflow regulating component, the blade body 11 of its blade 1 is located at the annular air inlet 9 to regulate the incoming airflow (flow velocity). (Pressure, direction, etc.); the connecting post 12 of the blade 1 is rotatably inserted through the corresponding shaft hole of the mounting plate 5. One end of the shift fork 3 is fixedly connected to the blade 1, and the other end of the shift fork 3 can be embedded in the corresponding groove of the shift plate 4 to realize the rotatable connection between the shift fork 3 and the shift plate 4. When the shift plate 4 rotates at an angle in the circumferential direction, the shift plate 4 drives all the shift forks 3 connected to it to move synchronously through its groove. Each shift fork 3 drives the blade 1 fixed to it to rotate synchronously around the axis of its respective connecting rod 12. The synchronous change of the angle of all blades 1 realizes the overall adjustment of the airflow through the annular air inlet 9.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An airflow regulating assembly for a nozzle ring, characterized in that: Includes blades (1), rivets (2), and forks (3); the blades (1) include a connecting rod (12), and blade bodies (11) and connectors (13) respectively fixed at both ends of the connecting rod (12); the connector (13) has a shaft hole (131) at the axial center of one end away from the connecting rod (12); one end of the fork (3) has a through mounting hole, and the upper part of the inner sidewall of the mounting hole has a toothed groove; the rivets ( 2) Includes an upper cover (21) and a riveting post (22); the riveting post (22) coaxially passes through the upper cover (21) and its outer diameter is smaller than that of the upper cover (21); the connector (13) is inserted into the mounting hole, and the lower end of the fork (3) abuts against the upper end of the connecting rod (12); the riveting post (22) is embedded in the shaft hole (131); the lower end of the upper cover (21) has an inverted conical structure and its lower end is deformed by riveting and meshes with the tooth groove of the mounting hole.

2. The airflow regulating assembly for a nozzle ring according to claim 1, characterized in that: The lower end of the upper cover (21) is provided with a cavity with an opening facing downwards. The outer diameter of the rivet post (22) is smaller than the inner diameter of the cavity, forming an annular groove (23). The upper end of the connector (13) is embedded in the annular groove (23) to form a tight fit.

3. The airflow regulating assembly for a nozzle ring according to claim 1, characterized in that: The mounting hole consists of a coaxially connected conical groove (31) and a through hole (32). The conical groove (31) is located on the upper side of the through hole (32), and the toothed groove is opened on the inner side wall of the conical groove (31). The conical groove (31) has an inverted conical structure that matches the lower end of the upper cover (21).

4. The airflow regulating assembly for a nozzle ring according to claim 3, characterized in that: The connector (13) passes through the through hole (32) and extends into the tapered groove (31); the cross-sections of the connector (13) and the through hole (32) are matching polygonal structures.

5. The airflow regulating assembly for a nozzle ring according to claim 1, characterized in that: The rivet (2) is integrally formed.

6. The airflow regulating assembly for a nozzle ring according to claim 1, characterized in that: The blade body (11) is an arc-shaped plate structure. The lower end of the connecting rod (12) is fixedly connected to the middle of one end of the blade body (11) in the width direction. The outer diameter of the connector (13) is smaller than the outer diameter of the connecting rod (12).

7. An airflow regulating assembly for a nozzle ring according to claim 4, characterized in that: The polygonal structure is hexagonal.

8. An airflow regulating assembly for a nozzle ring according to claim 1, characterized in that: The lower end of the rivet post (22) has a tapered structure with its outer diameter gradually decreasing from top to bottom.

9. An airflow regulating assembly for a nozzle ring according to claim 1, characterized in that: The shaft hole (131) is a blind hole.

10. A nozzle ring, characterized in that, Includes the airflow regulating component according to any one of claims 1-9.

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