CN219452187U

CN219452187U - Variable cross-section blade and nozzle ring

Info

Publication number: CN219452187U
Application number: CN202320877567.1U
Authority: CN
Inventors: 王佳永; 汤振绿
Original assignee: Wuxi Kailite Power Technology Co ltd
Current assignee: Wuxi Kailite Power Technology Co ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-08-01
Anticipated expiration: 2033-04-19

Abstract

The utility model relates to the technical field of nozzle rings, in particular to a variable-section blade and a nozzle ring. A variable-section blade includes a first connection shaft, a blade body, and a second connection shaft; the first connecting shaft, the blade main body and the second connecting shaft are sequentially connected from top to bottom, wherein the first connecting shaft and the second connecting shaft are coaxial; each longitudinal section of the blade main body has an included angle with the axis of the first connecting shaft in the length direction, and the size of any included angle is different; the utility model can improve the low-speed characteristic of the engine, reduce the abrupt sense caused by turbo lag when the supercharger is inserted, and further improve the fuel economy and safety performance of the engine.

Description

Variable cross-section blade and nozzle ring

Technical Field

The utility model relates to the technical field of nozzle rings, in particular to a variable cross-section blade and a nozzle ring.

Background

In the prior art, most of automobiles are provided with engines with superchargers, but with the continuous rigor of emission and the continuous improvement of requirements of people on automobile power, the most efficient working state of the power under different working conditions is required, and the application of nozzle ring technology is required.

The nozzle ring adopts movable nozzle ring blades which can rotate around respective axes, and the minimum flow cross section area of the turbine and the angle and speed of exhaust entering the turbine are changed along with the change of the movement angle of the nozzle ring blades, so that the rotating speed of the turbine and the supercharging pressure of the outlet end of the compressor are changed. When the engine runs at a low speed, the sectional area of the nozzle ring is reduced, the turbine speed is increased, the supercharging pressure and the air inflow at the low speed can be ensured, but the air inflow cannot be completely and accurately controlled; when the engine runs at a high speed, the sectional area of the nozzle ring is increased, the rotation speed of the turbine is reduced, and overspeed of the supercharger is prevented. However, when the nozzle ring vanes are moved to be closed, air cannot flow in and out from the side, so that the sudden sense of the intervention of the supercharger caused by turbo lag is caused, and the potential safety hazard is easily caused by the overlarge burst pressure of the supercharger during the intervention.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a variable-section blade and a nozzle ring, which can improve the low-speed characteristic of an engine, reduce the abrupt sense caused by turbo lag when a supercharger is inserted, and further improve the fuel economy and the safety performance of the engine.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a variable-section blade includes a first connection shaft, a blade body, and a second connection shaft; the first connecting shaft, the blade main body and the second connecting shaft are sequentially connected from top to bottom, wherein the first connecting shaft and the second connecting shaft are coaxial; each longitudinal section of the blade main body has an included angle with the axis of the first connecting shaft in the length direction, and the size of any included angle is different.

Preferably, the front end face and the rear end face of the blade body are curved surfaces, and the projection positions of each cross section of the blade body in the longitudinal direction are not coincident.

Preferably, the connection points of the first connection shaft and the second connection shaft with the blade body are located at the right end part of the blade body.

Preferably, each longitudinal section of the blade body has an acute angle with the axis of the first connecting shaft in the length direction.

Preferably, the first connecting shaft, the blade body and the second connecting shaft are integrally formed.

Preferably, the first connecting shaft, the blade body and the second connecting shaft are made of metal.

A nozzle ring comprising variable cross-section vanes and a mounting plate; the plurality of variable-section blades are distributed on the mounting plate in an annular array around the axle center of the mounting plate; when the variable-section blades rotate around the axis of the variable-section blades, adjacent variable-section blades are at least partially abutted.

Preferably, when the variable-section blades rotate around the axis of the variable-section blades, the adjacent variable-section blades are in point contact.

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

1. higher output torque: the angle of the blades is changed on the basis of the original variable-section nozzle ring blades, and the air inlet amount is increased in a wider engine rotating speed range by reducing the flow section. In particular, for light engines with a wide speed range, a variable-section supercharger is more suitable.

2. Good low-speed responsiveness: the angle of the blades of the supercharger is changed on the basis of the original variable-section nozzle ring blades, and the pressure of the exhaust pipe is improved by reducing the flow section, so that the rotating speed of the supercharger is rapidly improved.

3. Lower oil consumption: compared with a common nozzle ring, the angle of the blade of the nozzle ring is changed on the basis of the blade of the original variable-section nozzle ring, and higher efficiency can be achieved in the full rotating speed range.

4. Auxiliary EGR (exhaust gas recirculation): EGR reduces the oxygen content in the cylinder by recirculating exhaust gases into the fresh air, thereby reducing the exhaust gases produced during combustion. Only when the gas pressure in the exhaust pipe is higher than the gas pressure of the intake pipe, recirculation of exhaust gas can be achieved. For some working conditions which do not meet the condition, such as low-speed high-load running of the vehicle, the gas pressure in the exhaust pipe can be increased by reducing the flow cross section, so that EGR is realized.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a right side schematic view of a variable section vane of the present utility model;

FIG. 3 is a schematic view of the assembled structure of the variable section vane and mounting plate of the present utility model.

In the figure: 1 first connecting shaft, 2 blade main body, 3 second connecting shaft, 201 left curved blade, 202 right curved blade, 4 mounting plate.

Description of the embodiments

The following detailed description of the utility model, taken in conjunction with the accompanying drawings, will provide those skilled in the art with a more readily understood understanding of how the utility model may be practiced. While the present utility model has been described in connection with the preferred embodiments thereof, these embodiments are set forth only and are not intended to limit the scope of the utility model.

First embodiment: referring to fig. 1-2, a variable-section vane, comprising: a first connection shaft 1, a blade body 2, and a second connection shaft 3; the first connecting shaft 1, the blade main body 2 and the second connecting shaft 3 are sequentially connected from top to bottom, wherein the first connecting shaft 1 and the second connecting shaft 3 are coaxial, and the connection points of the first connecting shaft 1 and the second connecting shaft 3 and the blade main body 2 are all positioned at the right end part of the blade main body 2; the first connecting shaft 1 and the second connecting shaft 3 are provided for assisting the attachment of the vane body 2 to the nozzle ring.

Because of the connection of the first connecting shaft 1, the blade body 2 and the second connecting shaft 3, for better explanation, the left part of the blade body 2 is named as a left curved blade 201, and the right part of the blade body 2 is named as a right curved blade 202 by taking the axes of the first connecting shaft 1 and the second connecting shaft 3 as boundaries; the left curved blade 201 has a length greater than the length of the right curved blade 202.

In the present embodiment, the front and rear end surfaces of the blade body 2 are curved surfaces, and the projection positions of each cross section of the blade body 2 in the longitudinal direction are not coincident; each longitudinal section of the blade main body 2 has an included angle with the axis of the first connecting shaft 1 in the length direction, the size of any included angle is different, and any included angle is an acute angle.

In this embodiment, the first connecting shaft 1, the blade body 2 and the second connecting shaft 3 are integrally formed and made of metal materials, so as to ensure the rigidity of the variable-section blade structure.

Referring to fig. 3, a nozzle ring includes a plurality of variable-section blades and a mounting plate 4, the plurality of variable-section blades are distributed in an annular array around the axis of the mounting plate 4, and when the variable-section blades rotate around the axis of the variable-section blades, the adjacent variable-section blades are in point contact, that is, the left curved blade 201 and the right curved blade 202 of the adjacent variable-section blades are in point contact, so that when the adjacent variable-section blades are in contact, the nozzle ring is converted into a minimum flow area, and gaps exist between the contact surfaces of the adjacent variable-section blades, so that a minimum air inlet space is reserved, and further, the rotating speed and the supercharging pressure of the supercharger are accurately controlled.

Through this technical scheme, thereby through changing the flow area of the change turbine of the angle of self blade, also reserved minimum air inlet space at the side when the opening is minimum, thereby reach accurate control booster's rotational speed and boost pressure. At low speed, the pressure is increased by reducing the turbine flow sectional area, the low speed characteristic of the engine is improved, the abrupt sense of the turbocharger caused by turbo lag is reduced, and at high speed, the turbine flow sectional area is gradually increased, so that the whole pressure of the turbocharger is smaller than the boost pressure value of a conventional product, the turbocharger is not overspeed, and the explosion pressure is not too large to cause unsafe hidden trouble. Meanwhile, because the air inflow can be accurately controlled, the highest power range of the supercharger can be effectively improved, and the fuel economy of the engine can be greatly improved. When the engine is accelerated, in order to improve the response speed of the supercharger, the sectional area of the nozzle ring can be reduced, and the rotating speed of the supercharger is improved, so that the supercharging pressure and the air inflow are improved, and the air inflow requirement in transient operation is met.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A variable cross-section vane, characterized in that: a first connecting shaft (1), a blade body (2) and a second connecting shaft (3); the first connecting shaft (1), the blade main body (2) and the second connecting shaft (3) are sequentially connected from top to bottom, wherein the first connecting shaft (1) and the second connecting shaft (3) are coaxial; each longitudinal section of the blade main body (2) has an included angle with the axis of the first connecting shaft (1) in the length direction, and the size of any included angle is different.

2. A variable-section vane according to claim 1, characterized in that: the front end face and the rear end face of the blade body (2) are curved surfaces, and the projection positions of each cross section of the blade body (2) in the longitudinal direction are not coincident.

3. A variable-section vane according to claim 1, characterized in that: the connection points of the first connection shaft (1) and the second connection shaft (3) and the blade main body (2) are located at the right end part of the blade main body (2).

4. A variable-section vane according to claim 1, characterized in that: each longitudinal section of the blade body (2) forms an acute angle with the axis of the first connecting shaft (1) in the length direction.

5. A variable-section vane according to claim 1, characterized in that: the first connecting shaft (1), the blade main body (2) and the second connecting shaft (3) are of an integrated structure.

6. A variable-section vane according to claim 1, characterized in that: the first connecting shaft (1), the blade main body (2) and the second connecting shaft (3) are made of metal materials.

7. A nozzle ring, characterized in that: comprising a plurality of variable-section blades according to any one of claims 1 to 6 and a mounting plate (4); the plurality of variable-section blades are distributed on the mounting disc (4) in an annular array around the axle center of the mounting disc (4); when the variable-section blades rotate around the axis of the variable-section blades, adjacent variable-section blades are at least partially abutted.

8. A nozzle ring as defined in claim 7, wherein: when the variable section blades rotate around the axis of the variable section blades, the adjacent variable section blades are in point contact.