CN211370505U

CN211370505U - Nozzle ring structure with small driving resistance

Info

Publication number: CN211370505U
Application number: CN201922331389.9U
Authority: CN
Inventors: 王利娟; 沃鸣杰
Original assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Current assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-08-28
Anticipated expiration: 2029-12-23

Abstract

A nozzle ring structure with small driving resistance comprises a poking disc, a mounting disc and a rear cover, wherein a plurality of shaft holes are formed in the mounting disc, a rotatable blade shaft is arranged in each shaft hole, a poking fork is fixed at one end of each blade shaft, a blade is fixed at the other end of each blade shaft, and the poking forks and the blades are respectively arranged on two sides of the mounting disc; the poking disc is provided with a plurality of poking holes, the end parts of the poking forks are arranged in the poking holes, the poking discs drive the poking forks to move when rotating, and the rear covers are arranged on the outer sides of the blades; the end part of the shifting fork and the shifting hole are in point contact through a plurality of protruding structures. In the prior art, the end part of the shifting fork is in surface contact with the shifting hole, the indirect area between the end part of the shifting fork and the shifting hole is large, the required driving force is large, the responsiveness is poor, and the phenomena of blocking or incomplete rotation of the blade are easy to occur. In this application, change the face contact originally into the point contact, consequently at blade removal, rotation in-process, frictional force reduces greatly, has reduced drive power and responsiveness and is showing and improves.

Description

Nozzle ring structure with small driving resistance

Technical Field

The utility model belongs to the turbo charger field, concretely relates to a nozzle ring structure that is arranged in turbo charger that driving resistance is little.

Background

In the prior art, in order to reduce the fuel consumption of an automobile and improve the dynamic property of the automobile, a turbocharger is generally adopted to improve the power of an engine. In the design process of the turbocharger for the vehicle, in order to fully exert the efficiency and safety principle of the engine, the designed maximum rotating speed of the turbocharger is necessarily set in the full-load state of the engine, so that in the low-speed working condition of the engine, the rotating speed of the turbocharger is directly caused by low-displacement exhaust gas and is also in the low-speed state, the normal work of the turbocharger is directly influenced, and the working efficiency of the turbocharger in the low-speed state of the engine is reduced. In view of this situation, the current professional manufacturers have specifically designed nozzle ring structures of variable cross-section. The principle of the structure is as follows: when the engine works in a low-speed state, the area of the air outlet of the nozzle ring of the supercharger is reduced, so that the area of the nozzle is reduced and the air pressure is increased at the turbine end in a low-flow state, the working speed of a turbine rotor is improved, the air pressure of the air outlet at the gas compressor end is increased, and the working efficiency of the turbocharger in the low-speed state of the engine is improved.

The variable nozzle ring is used for being installed on the variable nozzle turbocharger, and the opening degree of nozzle blades of the variable nozzle ring is adjusted and controlled through an external control mechanism, so that the flow and the efficiency of the variable nozzle turbocharger are changed. In the present structure, the one end of blade axle is provided with the blade, and the other end of blade axle is provided with the shift fork, and the tip of this shift fork is arranged in the hole of dialling on the dial to rotate along with the rotation of dialling the dish, realize the rotation of blade. In the prior art, the end part of the shifting fork is in surface contact with the shifting hole, and the friction force is large in the rotating process during working, so that the driving force of the driving blade needs to be large, and the controllability of the blade is poor. Moreover, when the nozzle ring blade of the turbocharger needs to reach the calibrated opening, the problem that the specified opening cannot be reached or the calibrated opening cannot be reached in time due to large friction force exists, and the working condition is affected. In the above-described structure, if a gap is left between the end of the shift lever and the shift hole in order to reduce the frictional force, the accuracy during the rotation is lowered, and the work efficiency is also lowered.

Accordingly, the present application provides further design and improvements to nozzle rings in turbochargers that address some of the problems identified above.

SUMMERY OF THE UTILITY MODEL

To not enough among the above prior art, the utility model provides a nozzle ring structure that driving resistance is little for among turbo charger, with original shift fork tip and dial the face contact friction between the hole and become the point contact friction, more preferred becomes point contact rolling friction, reduced frictional force greatly, reduced driving resistance, reduced wearing and tearing, increased product life.

In order to solve the above technical problem, the present invention solves the above technical problems.

A nozzle ring structure with small driving resistance comprises a poking disc, a mounting disc and a rear cover, wherein a plurality of shaft holes are formed in the mounting disc, a rotatable blade shaft is arranged in each shaft hole, a poking fork is fixed at one end of each blade shaft, a blade is fixed at the other end of each blade shaft, and the poking forks and the blades are respectively arranged on two sides of the mounting disc; the poking disc is provided with a plurality of poking holes, the end parts of the poking forks are arranged in the poking holes, the poking discs drive the poking forks to move when rotating, and the rear covers are arranged on the outer sides of the blades; the end part of the shifting fork and the shifting hole are in point contact through a plurality of protruding structures.

In the prior art, the end part of the shifting fork is in surface contact with the shifting hole, the indirect area between the end part of the shifting fork and the shifting hole is large, and the friction force in the rotating process of the blade is large, so that the required driving force is large, the responsiveness is poor, and the phenomenon of blocking or incomplete rotation of the blade is easy to occur. In this application, change the face contact originally into the point contact, consequently at blade removal, rotation in-process, frictional force reduces greatly, has reduced drive power and responsiveness and is showing and improves.

In a preferred embodiment, at least three end projections are arranged on the outer wall of the end of the shifting fork, the end projections are of a cambered surface protruding structure, and the end projections are in point contact with the inner wall of the shifting hole. In this structure, the stability of contact can be guaranteed to three tip lug, and cambered surface bulge structure is the point contact, and frictional force is little.

In a preferred embodiment, the end lug is formed by a ball which is arranged in the end of the shifting fork and protrudes outwards, so that the original sliding friction is changed into rolling friction, and the friction force is smaller.

In a preferred embodiment, at least three shifting hole protruding blocks are arranged on the inner wall of the shifting hole, each shifting hole protruding block is of a cambered surface protruding structure, and each shifting hole protruding block is in point contact with the outer wall of the end part of each shifting fork. In this structure, the stability of contact can be guaranteed to three group hole lug, and cambered surface bulge structure is the point contact, and frictional force is little.

In a preferred embodiment, the poke hole lug is formed by outwards protruding balls arranged in the poke disc, so that the original sliding friction is changed into rolling friction, and the friction force is smaller.

In a preferred embodiment, a distance pin is arranged between the mounting plate and the rear cover for distance assembly.

Compared with the prior art, the utility model discloses following beneficial effect has: the nozzle ring structure for the turbocharger with small driving resistance is provided, the surface contact friction between the end part of the original shifting fork and the shifting hole is changed into point contact friction, and more preferably, the point contact rolling friction is changed, so that the friction force is greatly reduced, the driving resistance is reduced, the abrasion is reduced, and the service life of a product is prolonged.

Drawings

Fig. 1 is a perspective view of a nozzle ring according to the present invention.

Fig. 2 is a second perspective view of the nozzle ring of the present invention.

Fig. 3 is a side view of the nozzle ring of the present invention.

Fig. 4 is an enlarged view of the area a in fig. 3.

Fig. 5 is a perspective view of the rear cover of the present invention.

Fig. 6 is a perspective view of the nozzle ring without the rear cover in the present invention.

Fig. 7 is a perspective view of the nozzle ring without the rear cover and the mounting plate in the present invention.

Fig. 8 is a schematic view of the dial plate of the present invention.

Fig. 9 is a perspective view of the assembled blade, blade shaft and shift fork of the present invention.

FIG. 10 is a perspective view of an embodiment of a blade, blade shaft, and yoke assembly.

FIG. 11 is an enlarged view of one embodiment of a fork disposed in a draw hole.

FIG. 12 is an enlarged view of another embodiment of a fork disposed in a draw hole.

Fig. 13 is a partial sectional structural view in fig. 12.

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 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 13, the nozzle ring structure with small driving resistance in the present invention includes a toggle plate 1, a mounting plate 2, and a rear cover 3, wherein a distance pin 5 is provided between the mounting plate 2 and the rear cover 3 for distance assembly, the mounting plate 2 is provided with a plurality of shaft holes, a rotatable blade shaft 61 is provided in the shaft hole, one end of the blade shaft is fixed with a shift fork 4, the other end of the blade shaft is fixed with a blade 6, and the shift fork 4 and the blade 6 are respectively disposed at two sides of the mounting plate 2; the poking disc 1 is provided with a plurality of poking holes 11, the end part of the poking fork 4 is arranged in the poking holes 11, the poking disc 1 drives the poking fork 4 to move when rotating, and the rear cover 3 is arranged on the outer side of the blade 6; the end part of the shifting fork 4 is in point contact with the shifting hole 11 through a plurality of protruding structures.

In an embodiment of the present application, be equipped with at least three tip lug 41 on the tip outer wall of shift fork 4, tip lug 41 is the convex structure of cambered surface, tip lug 41 and the inner wall point contact of dialling hole 11. In this structure, the stability of contact can be guaranteed to three tip lugs 41, and cambered surface bulge structure is the point contact, and frictional force is little. Further, in this scheme, the end lug 41 is formed by the outward protrusion of the ball placed in the end of the shift fork 4, and the original sliding friction is changed into rolling friction, so that the friction force is smaller.

In another embodiment of the present application, be equipped with at least three group hole lug 14 on dialling the inner wall of hole 11, group hole lug 14 is cambered surface bulge structure, dial hole lug 14 and the tip outer wall point contact of shift fork 4. In this structure, three group's hole lug 14 can guarantee the stability of contact, and cambered surface bulge structure is the point contact, and frictional force is little. Further, in this scheme, the poking hole lug 14 is formed by the outward protrusion of the balls in the poking disc 1, so that the original sliding friction is changed into rolling friction, and the friction force is smaller.

In addition, in the technical scheme of this application, be equipped with a plurality of rolling piece 7 that correspond with the blade on the terminal surface of back lid 3 towards blade 6, rolling piece 7 offsets with blade 6 and makes blade 6 and the surface of back lid 3 contactless. Specifically, as shown in fig. 5, a plurality of slotted holes corresponding to the blades are formed in the end surface of the rear cover 3 facing the blades 6, the rolling members 7 are disposed in the slotted holes, and part of the rolling members 7 protrudes from the surface of the rear cover 3 to abut against the blades 6 (as can be seen from fig. 4, the rolling members 7 slightly protrude from the surface of the rear cover 3), the rolling members 7 correspond to the blades 6 one by one, so that the blades 6 do not contact with the surface of the rear cover 3, and the rolling members 7 are stably disposed and do not fall off; the position where the rolling piece 7 abuts against the blade 6 is coaxial with the blade shaft 61, the blade is stably stressed due to the arrangement mode, the coaxiality of the blade 6 is high in the continuous rotating process when the blade is used, and the blade cannot be inclined and deviated. In the structure, through the arrangement of the rolling parts, the sliding friction between the blades and the rear cover is changed into the rolling friction between the blades and the rolling parts, the friction resistance is greatly reduced, and the advantages of reducing the driving force for driving the nozzle ring and improving the responsiveness are realized

As can be seen from the above description, in the present application, the original surface contact is changed to point contact, so that during the moving and rotating process of the blade, the friction force is greatly reduced, the driving force is reduced, and the responsiveness is significantly improved.

More than, the utility model provides a nozzle ring structure that is arranged in turbocharger that driving resistance is little becomes point contact friction with original shift fork tip and the face contact friction of dialling between the hole, and more preferred becomes point contact rolling friction, has reduced frictional force greatly, has reduced driving resistance, has reduced wearing and tearing, has increased product 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 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. A nozzle ring structure with small driving resistance comprises a dial plate (1), a mounting plate (2) and a rear cover (3), wherein a plurality of shaft holes are formed in the mounting plate (2), a rotatable blade shaft (61) is arranged in each shaft hole, a shifting fork (4) is fixed at one end of each blade shaft (61), a blade (6) is fixed at the other end of each blade shaft (61), and the shifting forks (4) and the blades (6) are respectively arranged on two sides of the mounting plate (2); the poking disc (1) is provided with a plurality of poking holes (11), the end part of the poking fork (4) is arranged in the poking holes (11), the poking disc (1) drives the poking fork (4) to move when rotating, and the rear cover (3) is arranged on the outer side of the blade (6); the automatic shifting fork is characterized in that point contact is achieved between the end portion of the shifting fork (4) and the shifting hole (11) through a plurality of protruding structures.

2. The nozzle ring structure with low driving resistance as claimed in claim 1, wherein the shift fork (4) is provided with at least three end projections (41) on the outer wall of the end, the end projections (41) are of a cambered surface convex structure, and the end projections (41) are in point contact with the inner wall of the shift hole (11).

3. A low driving resistance nozzle ring structure as claimed in claim 2, wherein said end projections (41) are formed by balls placed in the ends of the shift fork (4) protruding outwards.

4. The nozzle ring structure with low driving resistance as claimed in claim 1, wherein the inner wall of the poking hole (11) is provided with at least three poking hole lugs (14), the poking hole lugs (14) are of cambered surface convex structures, and the poking hole lugs (14) are in point contact with the outer wall of the end part of the shifting fork (4).

5. A low driving resistance nozzle ring structure as claimed in claim 4, wherein said hole-shifting projections (14) are formed by balls disposed in the dial plate (1) to protrude outward.

6. A low driving resistance nozzle ring structure according to claim 1, wherein distance pins (5) are provided between the mounting plate (2) and the back cover (3).