CN202370599U - Section variable nozzle ring assembly for bidirectional positioning of shifting disc and double support of blade - Google Patents

Abstract

The utility model discloses a two-way positioning vane double-supporting variable cross-section of the toggle plate, which can reliably position the toggle plate in the axial and radial directions, prevent the deformation and displacement of the toggle plate under high temperature, and prevent the shift fork from falling off. Nozzle ring assembly. It is composed of rear cover 1, spring leaf 2, blade 3, distance sleeve 4, mounting plate 5, heat insulation support plate 6, dial plate 7, limit plate 8, shift fork 9, limit pin 10, of which the dial The moving plate 7 is placed in the limited space formed by the heat-insulating support plate 6 and the limit plate 8; the heat-insulation support plate 6 and the limit plate 8 are fixed on the mounting plate 5; the blade 3 is inserted into the back cover 1, and the back cover 1, The mounting disc 5 and the vane 3 form a variable cross-section flow channel. When working, when the dial 7 is driven by external force to rotate, it will drive the shift fork 9 to rotate, and the shift fork 9 will drive the blade 3 to rotate, thereby changing the angle of the blade and adjusting the air flow section, so that the engine can operate at various power levels under the support of the supercharger. sections can work more efficiently.

Description

Two-way positioning of the toggle plate Double support variable section nozzle ring assembly of the vane

technical field

The utility model relates to an automobile part, which is applied to an engine supercharger, in particular to a double-supported variable-section nozzle ring assembly of a two-way positioning vane of a dial. the

Background technique

Turbocharging is one of the development directions of internal combustion engine technology in the world, and it is the most important way to strengthen internal combustion engines today. Turbocharging technology can greatly increase engine output power, save energy, and reduce engine exhaust pollution. The variable cross-section nozzle ring assembly is the key component of today's advanced variable geometry turbocharger. The vane angle used for the nozzle ring assembly of the engine supercharger is fixed and the vane is not adjustable. The supercharger can only make the engine To 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. With the support of the device, it can work more efficiently at each power stage (nozzle ring assembly patent number: ZL 2006 1 0163404.8). The improved nozzle ring assembly is a double disc support variable section nozzle ring assembly (nozzle ring assembly patent number: ZL 2010 20144255.2), which can quickly and efficiently adjust the air flow so that the supercharger can work efficiently, and the blade part is in a stable working state. High temperature reliability. However, the toggle disc supporting the variable cross-section nozzle ring assembly is not positioned reliably in the axial and radial directions, and is prone to deformation and displacement when the load is high at high temperature. The shift fork that matches it will be deformed by the toggle disc Or the position falls out of it, causing the nozzle ring assembly to fail to drive and get stuck. the

Contents of the invention

Aiming at the deficiencies of the above-mentioned technologies, the utility model proposes a method that can reliably position the dial in the axial and radial directions, prevent the deformation and displacement of the dial when the load is large at high temperature, and prevent the shifting fork from being moved due to the shifting. Deformation or movement of the disk The toggle disk from which it falls out Bi-directionally positioned vanes Double-supported variable-section nozzle ring assembly. the

The technical solution to the technical problem solved by the utility model is as follows: it is composed of a back cover, a spring leaf, a blade, a distance sleeve, a mounting plate, a heat-insulating support plate, a dial, a limit plate, a shift fork, and a limit pin. , wherein: the toggle plate is placed in the limited space formed by the heat-insulating support plate and the limit plate, and the heat-insulation support plate and the limit plate are fixed on the installation plate through a distance sleeve, thus the toggle plate obtains an axial and radial two-way positioning; the dial is provided with a slot corresponding to the shift fork, and the shift fork is directly placed in the slot corresponding to the dial, and can rotate and slide freely in the slot; the blade is installed and The back cover is double-supported, the number of blades is 9-19, the head of the blade is inserted into the back cover and can rotate freely, the tail of the blade is installed in the installation plate and connected with the shift fork, the shape of the blade can be selected from our company's appearance design Patents: streamline symmetrical type (ZL200930185904.6), linear symmetrical type (ZL200930185915.4), pneumatic type (ZL200930090768.2, ZL200930090764.4), etc., the limit pin is directly inserted into the mounting plate and fixed to prevent the forward travel of the shift fork If it is too large, the opening of the blade will be too large, and at the same time, it will prevent the tip of the blade from touching the turbine and cause damage to the turbine or nozzle ring assembly; The cover is axially positioned by the leaf spring when inserted into the housing of the turbocharger, securing the entire nozzle ring assembly to the turbocharger. the

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 increases, and the boost pressure increases, which ensures the boost pressure and intake air volume at low speed, improves the air-fuel ratio, and fully burns the fuel , to prevent the occurrence of black smoke; when the engine is running at high speed, the nozzle ring blades are rotated in the opposite direction to increase the cross-sectional area of the nozzle ring, the turbine speed is reduced, and the supercharger is prevented 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. the

The utility model has the advantages that: the limit plate and the heat-insulating support plate have positioned the dial in the axial and radial directions, which can prevent the dial from moving and deforming when the load is high at high temperature; The double support of the mounting plate and the back cover improves the stress condition of the blade and prevents the deformation of the blade shaft when the blade is loaded under high temperature. Therefore, it is avoided that the fork of the nozzle ring assembly cannot be driven and is stuck due to the deformation or displacement of the shifting disc under the condition of high temperature and heavy load. In addition, the heat insulation support plate also plays a role of heat insulation, which can make the temperature on the side of the fork and the dial significantly lower than the temperature on the side of the blade, creating a better working condition for the components and effectively preventing the dial from being damaged. High temperature deformation and displacement. the

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described

Fig. 1 is the schematic diagram of the cross-sectional structure of the utility model

Fig. 2 is the left view of embodiment 1

Figure 3 is a schematic diagram of the assembly of the heat insulation support plate 6, the toggle plate 7, and the limit plate 8

Fig. 4 is the left side view of the utility model embodiment 2

Fig. 5 is the left side view of the utility model embodiment 3

In the figure: 1, rear cover 2, spring leaf 3, blade 4, spacer sleeve 5, installation plate 6, heat insulation support plate 7, toggle plate 8, limit plate 9, shift fork 10, limit pin 11, notch

Detailed ways

Fig. 2 is the utility model embodiment 1, in Fig. 1, Fig. 2 and Fig. 3: the dial 7 is placed in the limited space formed by the heat-insulating support plate 6 and the limit plate 8, and the heat-insulation support plate 6 and the limit plate The bit plate 8 is welded on the mounting plate 5 through the spacer sleeve 4, so that the dial 7 can be positioned axially and radially. In addition, the heat insulating support plate 6 also plays a role of heat insulation, allowing the shift fork to 9 and the temperature on the side of the dial 7 are obviously lower than the temperature on the side of the blade 3, which creates a better working condition for the components and effectively prevents the high-temperature deformation and displacement of the dial 7; The notch 11 corresponding to the shift fork 9, the shift fork 9 is directly placed in the notch 11 corresponding to the dial 7, and can freely rotate and slide in the notch 11; the number of blades 3 is 11, and its shape is a flow Line symmetric type, the head of the blade 3 is inserted into the back cover and can rotate freely, the tail of the blade 3 is installed in the mounting plate 5 and welded with the shift fork 9; the limit pin 10 is directly inserted into the mounting plate 5 and fixed to prevent the shift fork 9 The forward stroke is too large and the opening of the blade 3 is too large to prevent the tip of the blade 3 from hitting the turbine and causing damage to the turbine or nozzle ring assembly; the rear cover 1 is fixed on the mounting plate 5 through the distance sleeve 4, and the rear cover 1 is equipped with a spring leaf 2, and when the rear cover 1 is inserted into the casing of the turbocharger, the spring leaf 2 is axially positioned so that the entire nozzle ring assembly is fixed on the turbocharger. So far, the rear cover 1, the mounting plate 5 and the vanes 3 form a variable cross-section flow channel. During operation, the dial 7 is driven by external force. Since the dial 7 and the shift fork 9 are in sliding fit, the dial 7 When rotating, it will drive the shift fork 9 to rotate, and the shift fork 9 will drive the blade 3 to rotate, thereby changing the angle of the blade and adjusting the air flow section, so that the engine can work more efficiently at each power stage with the support of the supercharger. the

Fig. 4 is embodiment 2 of the present utility model, and in Fig. 4: dial 7 is placed in the limited space that heat-insulation support plate 6 and limit plate 8 form, and heat-insulation support plate 6 and limit plate 8 pass fixed The distance sleeve 4 is welded on the mounting plate 5, so that the toggle plate 7 is positioned axially and radially. In addition, the heat-insulating support plate 6 also plays a role of heat insulation, allowing the shift fork 9 and the toggle plate to The temperature on this side of 7 is obviously lower than the temperature on the side of the blade 3, which creates a better working condition for the components and effectively prevents the high-temperature deformation and displacement of the dial 7; The notch 11, the shift fork 9 is directly placed in the notch 11 corresponding to the dial 7, and can freely rotate and slide in the notch 11; the number of blades 3 is 12, and its shape is linear symmetry. The head of the blade is inserted into the back cover and can rotate freely. The tail of the blade 3 is installed in the mounting plate 5 and welded with the shift fork 9; the limit pin 10 is directly inserted into the mounting plate 5 and fixed to prevent the forward stroke of the shift fork 9 from The opening of the driving blade 3 is too large to prevent the tip of the blade 3 from hitting the turbine and causing damage to the turbine or nozzle ring assembly; the rear cover 1 is fixed on the mounting plate 5 through the distance sleeve 4, and the rear cover 1 is equipped with a spring piece 2 , when the rear cover 1 is inserted into the casing of the turbocharger, it is axially positioned by the spring plate 2, so that the entire nozzle ring assembly is fixed on the turbocharger. So far, the rear cover 1, the mounting plate 5 and the vanes 3 form a variable cross-section flow channel. During operation, the dial 7 is driven by external force. Since the dial 7 and the shift fork 9 are in sliding fit, the dial 7 When rotating, it will drive the shift fork 9 to rotate, and the shift fork 9 will drive the blade 3 to rotate, thereby changing the angle of the blade and adjusting the air flow section, so that the engine can work more efficiently at each power stage with the support of the supercharger. the

Fig. 5 is embodiment 3 of the present utility model. In Fig. 5 , the toggle plate 7 is placed in the limited space formed by the heat-insulating support plate 6 and the limit plate 8, and the heat-insulation support plate 6 and the limit plate 8 pass through the fixed space. The sleeve 4 is welded on the mounting plate 5, so that the toggle plate 7 is positioned axially and radially. In addition, the heat-insulating support plate 6 also plays a role of heat insulation, allowing the shift fork 9 and the toggle plate 7 to The temperature on this side is obviously lower than the temperature on the blade 3 side, creating a better working condition for the components, effectively preventing the high-temperature deformation and displacement of the dial 7; The notch 11, the shift fork 9 is directly placed in the notch 11 corresponding to the dial 7, and can freely rotate and slide in the notch 11; the number of blades 3 is 10, and its shape is pneumatic, and the head of the blade 3 part inserted into the rear cover and can rotate freely, the tail of the blade 3 is installed in the mounting plate 5 and welded with the shift fork 9; the limit pin 10 is directly inserted into the mounting plate 5 and fixed to prevent the forward stroke of the shift fork 9 from being too large and driving the blade 3 The opening is too large to prevent the tip of the blade 3 from hitting the turbine and causing damage to the turbine or nozzle ring assembly; the rear cover 1 is fixed on the mounting plate 5 through the distance sleeve 4, and the rear cover 1 is equipped with a spring piece 2. When When the rear cover 1 is inserted into the casing of the turbocharger, it is axially positioned by the spring leaf 2, so that the entire nozzle ring assembly is fixed on the turbocharger. So far, the back cover 1, the mounting plate 5 and the vanes 3 have formed a variable cross-section flow channel. When working, the dial 7 is driven by external force. Since the dial 7 and the shift fork 9 are in sliding fit, the dial 7 When rotating, it will drive the shift fork 9 to rotate, and the shift fork 9 will drive the blade 3 to rotate, thereby changing the angle of the blade and adjusting the airflow section, so that the engine can work more efficiently at each power stage with the support of the supercharger. the

Claims (6)

1. A double-supported variable-section nozzle ring assembly for two-way positioning blades of a dial, including a rear cover (1), a spring leaf (2), blades (3), a distance sleeve (4), a mounting plate (5), Heat insulation support plate (6), toggle plate (7), limit plate (8), shift fork (9) and limit pin (10), it is characterized in that: toggle plate (7) is placed on the heat insulation support In the limited space formed by the plate (6) and the limit plate (8); the heat-insulating support plate (6) and the limit plate (8) are fixed on the mounting plate (5) through the distance sleeve (4); the dial (7) is provided with the notch (11) corresponding to shift fork (9), and shift fork (9) is directly placed in the notch (11) corresponding to dial (7); the quantity of blade (3) is 9-19 pieces, the head of which is inserted into the back cover (1), the tail is installed in the mounting plate (5) and connected with the shift fork (9); the limit pin (10) is directly inserted into the mounting plate (5) to fix; the rear The cover (1) is fixed on the mounting plate (5) by a distance sleeve (4). 2. The double-supported variable-section nozzle ring assembly of the two-way positioning blade of the dial according to claim 1, characterized in that: the heat-insulating support plate (6) and the limit plate (8) are welded by the distance sleeve (4) on the installation disk (5). 3. According to claim 1, the two-way positioning vane double-support variable cross-section nozzle ring assembly of the dial is characterized in that: the vanes (3) are streamline-symmetrical in shape and 11 in number. In the cover (1), the afterbody is contained in the mounting plate (5) and welded with the shift fork (9). 4. The double-supported variable-section nozzle ring assembly with two-way positioning blades of the dial according to claim 1, characterized in that: the shape of the blades (3) is linearly symmetrical, the number is 12, and the heads of the blades are inserted into the rear cover In (1), the tail is contained in the mounting plate (5) and welded with the shift fork (9). 5. The dual-support variable-section nozzle ring assembly with two-way positioning blades of the dial according to claim 1 is characterized in that: the shape of the blades (3) is aerodynamic type, the number is 10, and the heads of the blades are inserted into the rear cover ( 1), the tail is installed in the mounting plate (5) and welded with the shift fork (9). 6. The double-supported variable-section nozzle ring assembly with two-way positioning blades of the dial according to claim 1, characterized in that: a spring leaf (2) is installed on the back cover (1).

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