CN201474729U - Compact Disc Drive Variable Area Nozzle Ring Assemblies - Google Patents

Abstract

The utility model discloses a compact disk-shaped driving variable section nozzle ring assembly with more compact transmission, better consistency of blade action and higher high-temperature reliability of the assembly, which includes blades 4, mounting disks 5, driving disks 6, Shift fork 7, collar 9, drive piece 10 and drive column 11, wherein blade 4 is installed in mounting plate 5, and welded together with shift fork 7 to form nozzle ring weldment 13; drive plate 6 is directly set on mounting plate 5 Above, the driving column 11 is inserted into the driving piece 10, and the collar 9 is welded on the driving column 11. During work, the collar 9 and the driving column 11 are moved, thereby driving the driving piece 10 and the driving plate 6, and the driving plate 6 and the shift fork 7 are in a sliding fit, so when the driving plate 6 rotates, it drives the shift fork 7 to rotate, and the shift fork 7 rotates. 7 drives the blades 4 to rotate, thereby changing the angle of the blades and adjusting the cross-section of the airflow, so that the engine can work more efficiently at each power stage with the support of the supercharger.

Description

Compact Disc Drive Variable Area Nozzle Ring Assemblies

technical field

The utility model relates to an automobile part, which is applied to an engine supercharger, in particular to a compact disk-shaped driving variable section nozzle ring assembly.

Background technique

Turbocharging is one of the development directions of internal combustion engine technology in the world. Turbocharging technology can greatly increase engine output power, save energy, and reduce engine exhaust pollution. The variable section nozzle ring assembly is a key component in today's advanced variable geometry turbocharger. Previously, the angle of the blades used in the engine supercharger nozzle ring assembly was fixed and the blades were not adjustable. The supercharger can only make the engine work efficiently in a certain power range. Our company is the first in China to improve the structure of the nozzle ring assembly so that the angle of the blade can be adjusted. All segments can work more efficiently (patent application number: 200610163404.8). However, the structure of the nozzle ring assembly in the early stage of improvement is: the blade is inserted on the mounting plate, the shift fork is welded to the end of the blade, and then the shift fork is set in the driving disc, and an active shift fork is placed on the driving disc, and the active shift fork is driven by external force to achieve Drive the drive plate, and then drive the shift fork through the drive plate, and the shift fork drives the blade to rotate, thereby changing the cross section of the gas channel. The connection between the drive plate and the components is relatively loose, and there are disadvantages such as displacement or blade slipping out under high temperature, and uncoordinated action of the blades.

Contents of the invention

Aiming at the deficiencies of the above-mentioned technologies, the utility model proposes a compact disc-driven variable-section nozzle ring assembly with more compact transmission, better blade action consistency, and higher high-temperature reliability of the assembly.

The technical solution to the technical problem solved by the utility model is: the nozzle ring assembly includes a distance bolt, a nut, a back cover, a blade, a mounting plate, a drive plate, a shift fork, a gasket, a collar, a drive plate, and a drive column. and screws, wherein the blades are installed in the mounting plate, and welded together with the shift fork to form a nozzle ring weldment; the drive plate is directly set on the mounting plate, when the blade and the shift fork are welded, the position of the drive plate is in the weldment fixed; the rear cover is fixed on the mounting plate by distance bolts and nuts, so far, the rear cover, mounting plate and blades form a variable cross-section flow channel; the gasket and the driving plate are fixed on the driving plate by screws; the driving column is inserted into the In the drive piece, the collar is welded to the drive post.

The working principle of the variable geometry turbocharger is to achieve the best match with the engine at each speed by changing the flow section of the turbine. When the engine is running at low speed, the nozzle ring blades are rotated to adjust the cross-sectional area of the turbine inlet, the turbine speed rises, and the boost pressure increases, ensuring the boost pressure and intake air volume at low speed, increasing the air-fuel ratio, and fully burning the fuel. The problem of black smoke is prevented; when the engine is running at high speed, the blades of the nozzle ring are rotated in the opposite direction to increase the cross-sectional area of the nozzle ring, and the speed of the turbine is reduced to prevent the supercharger from overspeeding. When the engine accelerates, the blades of the nozzle ring are rotated to reduce the cross-sectional area of the nozzle ring and rapidly increase the speed of the supercharger, thereby improving the transient response of the supercharger. The nozzle ring blades in the nozzle ring assembly can adjust the rotation angle of the blades according to the requirements of the engine's working conditions, and accept the instructions of the engine electronic control system (or according to the boost pressure), so as to maintain the best gas flow path area and keep the turbine at a high level all the time. Work in the efficiency zone, so as to ensure that the turbocharger responds to the change of the engine's working conditions in a timely manner, improves the transient performance of the engine, and ensures the technical and economic indicators and emission performance of the engine.

Description of drawings

Fig. 1 is the utility model sectional structure schematic diagram

Figure 2 is a top view of Figure 1

In the figure 1, distance bolt 2, nut 3, rear cover 4, blade 5, mounting plate 6, driving plate 7, shift fork 8, gasket 9, collar 10, driving plate 11, driving column 12, screw 13, Nozzle ring weldment

Detailed ways

In Fig. 1 and Fig. 2: the blade 4 is installed in the mounting plate 5, and is welded together with the shift fork 7 to form the nozzle ring weldment 13; the drive plate 6 is directly set on the mounting plate 5, when the blade 4 and the shift fork 7 are After solidification, the position of the drive plate 6 is fixed in the weldment; the back cover 3 is fixed on the mounting plate 5 through the distance bolt 1 and the nut 2, so far, the back cover 3, the mounting plate 5 and the blade 4 form a variable section The flow channel; the gasket 8 and the driving piece 10 are fixed on the driving disk 6 by screws 12; the driving column 11 is inserted into the driving piece 10, and the collar 9 is welded on the driving column 11. During work, the engine control system simultaneously moves the collar 9 and the drive column 11 through an active shift fork, thereby driving the drive plate 10 and the drive disc 6. The drive disc 6 and the shift fork 7 are in a sliding fit, so when the drive disc 6 rotates , it will drive the shift fork 7 to rotate, and the shift fork 7 will drive the blade 4 to rotate, thereby changing the angle of the blade 4 and adjusting the air flow section, so that the engine can work more efficiently at each power stage under the support of the supercharger.

Claims (3)

1. a compact dish type drives the variable-area nozzle ring member, comprise distance bolt (1), nut (2), bonnet (3), blade (4), mounting disc (5), drive plate (6), shift fork (7), pad (8), the collar (9), driving plate (10), drive post (11) and screw (12), it is characterized in that: blade (4) is contained in the mounting disc (5), forms nozzle ring weldment (13) jointly with shift fork (7) solid welding; Drive plate (6) be enclosed within directly that mounting disc (5) is gone up and shift fork (7) between for being slidingly matched, bonnet (3) is fixed in the mounting disc (5), pad (8) and driving plate (10) are fixed on the drive plate (6); Drive post (11) is inserted in the driving plate (10), and the collar (9) is welded on the drive post (11).

2. compact dish type according to claim 1 drives the variable-area nozzle ring member, and it is characterized in that: bonnet (3) is fixed in the mounting disc (5) by distance bolt (1) and nut (2).

3. compact dish type according to claim 1 drives the variable-area nozzle ring member, and it is characterized in that: pad (8) and driving plate (10) are fixed on the drive plate (6) by screw (12).

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