WO2016029622A1

WO2016029622A1 - Exhaust gas turbocharger system with three-level adjustable nozzles

Info

Publication number: WO2016029622A1
Application number: PCT/CN2015/000584
Authority: WO
Inventors: 施永强
Original assignee: 施永强
Priority date: 2014-08-28
Filing date: 2015-08-12
Publication date: 2016-03-03
Also published as: CN104196579A; CN104196579B

Abstract

Disclosed is an exhaust gas turbocharger system with three-level adjustable nozzles, comprising a cap-shaped fixed blade nozzle ring (1) with a central hole, a plurality of adjustable blade nozzles (2), an adjustable cylindrical nozzle (3) and two T-shaped levers (6), wherein fixed nozzles (13) are uniformly distributed on a side end face of the fixed blade nozzle ring (1), and one end of each T-shaped lever (6) is connected to a transmission device for controlling the T-shaped lever (6) to axially move; the adjustable cylindrical nozzle (3) is connected between the two T-shaped levers (6), the adjustable cylindrical nozzle (3) has a cylindrical shape, and the adjustable blade nozzles (2) are fixed to the cylindrical periphery of the adjustable cylindrical nozzle (3); and the T-shaped levers (6) axially move in the direction of the fixed nozzles (13), so as to drive the adjustable blade nozzles (2) to extend out of an end face of the fixed blade nozzle ring (1) and to drive the adjustable cylindrical nozzle (3) to extend out of the hole of the fixed blade nozzle ring. Due to the fact that the outlet section area of the nozzles changes by means of axial movement, and the minimum outlet section area can be achieved, the adjustment range is enlarged.

Description

Exhaust gas turbocharger system with three-stage adjustable nozzle

Technical field

The invention relates to an exhaust gas turbocharger system with a three-stage adjustable nozzle, belonging to the technical field of machinery.

Background technique

At present, exhaust gas turbocharger technology has been widely used in internal combustion engines to improve the output of internal combustion engines, reduce unit power consumption and reduce the emission of harmful gases and harmful particulate matter. However, due to the frequent change of working conditions of the vehicle engine, the supercharger will work in the non-efficient area during the working period, thereby reducing the supercharging effect and failing to achieve the energy saving and emission reduction index.

In order to adapt the supercharger to the actual working condition of the vehicle engine, the current measures are to change the bladeless runner turbine shell 4 in the original structure to a three-stage nozzle with

adjustable blades

1, 2, and 3, so that The nozzle outlet section changes with the need of the engine to change the operating conditions to expand the working range of the booster high-efficiency zone, achieving energy saving, increasing output power, and reducing emissions.

The use of adjustable nozzle structure is an effective method to improve the aerodynamic performance of the turbine. It is also recognized as one of the most energy-saving and major environmental protection solutions for the world's turbocharger manufacturers. It has been gradually promoted and implemented. There are several different technical solutions:

First, the Honeywell International Corporation has applied for patent number 200710152744.5 "Assembling Method of Blade Set and Blade Assembly of Variable Nozzle Turbocharger" is a variable nozzle method using a rotating blade angle. The advantage is that the nozzle cross-sectional area decreases as the blade rotation angle decreases, and the nozzle area reduction rate can reach more than 70%, so that the thermal efficiency of the supercharger decreases when working under low and high working conditions.

There is also a variable cross-section structure patented by French Honeywell Garrett Co., Ltd. Patent No. 00819834.9 "Variable Shape Turbocharger with Sliding Piston", with half of the nozzle fixed by the blade and the other half by the leafless airway composition. The adjustable area is only half of the airway. But its aerodynamic performance is not good. When the vaneless passage is opened, the airflow will flow simultaneously from the vane passage and the vaneless passage, because the airflow angles of the two passages are different, which will cause the airflow behind the nozzle to be disordered, increase the flow loss of the airflow, and reduce the thermal efficiency of the turbine.

The turbocharger of the two-blade nozzle system applied by China Wuxi Kaidi Supercharger Parts Co., Ltd., Patent No. 201110233106.2; International Application No. PCT/CN2012/001087; US Application Acceptance No. 9376.

The turbocharger of the two-blade nozzle system proposed by China Wuxi Kaidi Supercharger Parts Co., Ltd., the new blade placed along the nozzle flow channel can reduce the cross-sectional area of the flow channel and divide the original nozzle into two air passages. Reduce lateral flow loss of airflow. At the same time, the airflow still flows at the optimum airflow angle of the original design, which improves the expansion of the turbine high efficiency zone.

However, the above technical solutions cannot meet the regulation of the flow passage range, and adjusting the flow passage range is very important for improving the working state of the engine at an ultra-high speed and a low speed.

Summary of the invention

The invention provides an exhaust gas turbocharger system with a three-stage adjustable nozzle. On the basis of the original patent, the scope of the regulating flow passage is expanded to meet the achievement of a wider energy saving and environmental protection parameter index.

In order to solve the above technical problem, the present invention provides the following technical solution: the supercharger includes a turbine casing, an intermediate casing provided with a boss in the middle portion, a turbine and a turbine drive shaft, and the exhaust turbine component is installed in the intermediate casing and fixed on the a turbine casing, the turbine is connected to the turbine drive shaft, the convex portion of the intermediate casing is disposed at the bottom of the turbine, the turbine is located in the volute cavity, and the supercharger further comprises a hat-shaped fixed blade nozzle ring with a hole in the middle, and a plurality of adjustable blades a nozzle, an adjustable cylindrical nozzle and two T-shaped levers, wherein the fixed end nozzles are provided with fixed nozzles on the side end faces thereof, and the fixed nozzles are disposed in the exhaust gas flow passage of the volute cavity and have a certain inclination angle with the flow direction of the exhaust gas flow, The fixed vane nozzle ring is pressed by the intermediate casing and the volute; the two T-shaped levers vertically pass through the intermediate casing and are freely axially movable relative to the intermediate casing; one end of the T-shaped lever is connected to control the T-shaped lever as a shaft To the moving transmission; an adjustable cylindrical nozzle is connected between the two T-shaped levers, the adjustable cylindrical nozzle is a cylindrical shape, and the adjustable vane nozzle is fixed around the cylinder of the adjustable cylindrical nozzle; The axial movement along the direction of the fixed nozzle drives the adjustable vane nozzle and the adjustable cylindrical nozzle to protrude from the end surface of the fixed vane nozzle and the hole respectively, and the protruding amount of the adjustable cylindrical nozzle lags behind the protrusion of the adjustable vane nozzle The height of the adjustable cylindrical nozzle is the same as the height of the turbine inlet side, or higher or lower. The height of the cylindrical nozzle will be matched with the turbine inlet height according to the performance requirements and can be highly consistent.

Further, the transmission device comprises two spherical connecting rods, a transmission shaft base, a transmission shaft, a transmission plate and a connecting column, the T-shaped lever is provided with a radial hole, the spherical connecting rod is inserted into the T-shaped lever, and the two spherical shapes are A transmission shaft is connected between the connecting rods, and one end of the transmission shaft is vertically fixed with a transmission plate. The outer side of the transmission plate is provided with a connecting column, and the outer diameter of the transmission shaft is installed in the inner hole of the transmission shaft seat, and the internal threads of the two ends of the transmission shaft are The two spherical links are connected and positioned.

The exhaust turbocharger system with the three-stage adjustable nozzle relates to adjusting the nozzle cross-sectional area in three stages: one set is a fixed nozzle, and the front edge of the turbine inlet is set according to the optimal air flow direction for intake. a set of fixed nozzles for diversion, the other is an axially movable adjustable vane nozzle and a third set of adjustable cylindrical nozzles mounted on the intermediate body, and the axially movable adjustable vane nozzle exits the fixed vane and can When the cylindrical nozzle is adjusted, the nozzle outlet section is the largest. When the adjustable vane nozzle and the adjustable cylindrical nozzle gradually move toward the fixed vane, the cross-sectional area of the scroll flow passage will be gradually reduced until the nozzle area is minimized. Since the change in the cross-sectional area of the nozzle outlet is axially moved, and the minimum exit cross-sectional area can be achieved, especially when the minimum exit cross-sectional area of the outlet is guided, the adjustment is expanded compared to the prior patented technology. The scope of the technical solution is a new three-stage variable nozzle structure.

The transmission device adopts a positive pressure valve execution valve, a negative pressure valve actuator or a solenoid valve to connect the upper connecting column for direct movement, and through the transmission plate, the linear motion is converted into a rotary motion to drive the transmission shaft to rotate, and the rotation shaft rotates to reach the spherical shape. The connecting rod swings, because the spherical connection is connected with the 90° of the T-shaped lever, the T-shaped lever is linearly moved, and finally the adjustable vane nozzle and the adjustable cylindrical nozzle are controlled. In order to fix the rotating shaft, a drive shaft base is added to the shape of the intermediate body for axial movement of the fixed T-shaped lever, and the T-shaped lever is installed in the two bushings of special materials.

DRAWINGS

Figure 1 is a cross-sectional view of an exhaust gas turbocharger system having a three-stage adjustable nozzle of the present invention;

Figure 2 is a structural view showing the connection of the transmission of the T-type lever of the present invention;

Figure 3 is a view showing the working structure of the first stage fixed vane nozzle ring of the present invention;

Figure 4 is a view showing the working structure of the two-stage adjustable vane nozzle of the present invention;

Figure 5 is a state diagram of the working structure of the three-stage cylindrical nozzle of the present invention;

Figure 6 is a front elevational view of the T-shaped lever of the present invention;

Figure 7 is a side view of the T-shaped lever of the present invention;

Figure 8 is a structural view of a spherical link of the present invention;

Figure 9 is a front elevational view of the drive shaft base of the present invention;

Figure 10 is a side view of the drive shaft base of the present invention;

Figure 11 is a front elevational view of the drive shaft of the present invention;

Figure 12 is a side view of the drive shaft of the present invention;

Figure 13 is a structural view of a drive plate of the present invention;

Figure 14 is a structural view of a connecting post of the present invention;

Figure 15 is a front elevational view showing the T-shaped lever of the present invention and two adjustable nozzles;

Figure 16 is a side view showing the connection of the T-shaped lever of the present invention and two adjustable nozzles;

Figure 17 is a schematic view showing the structure of an apparatus for driving an adjustable nozzle of the present invention.

detailed description

As shown in FIG. 1, the supercharger includes a turbine casing 4, an intermediate casing 7 provided with a boss in the middle, a turbine 5 and a turbine drive shaft, and the exhaust turbine component is installed in the intermediate casing and fixed to the turbine casing, the turbine The casing has a built-in turbine drive shaft, the boss of the intermediate casing is disposed at the bottom of the turbine, and the turbine is located in the volute cavity, wherein the supercharger is further The utility model comprises a hat-shaped fixed blade nozzle ring 1 with a hole in the middle, a plurality of adjustable blade nozzles 2, an adjustable cylindrical nozzle 3 and two T-shaped levers 6. The fixed nozzles are arranged on the side end faces of the fixed blade nozzle rings. a fixed nozzle is disposed in the exhaust gas flow path of the volute cavity and has a certain inclination angle with the flow direction of the exhaust gas, and the fixed blade nozzle ring is pressed by the intermediate case and the volute; the two T-shaped levers 6 vertically pass through the intermediate case, and Free axial movement is possible with respect to the intermediate casing; one end of the T-shaped lever is connected to the transmission device for controlling the T-shaped lever 6 for axial movement; the two T-shaped levers 6 are connected with the adjustable cylindrical nozzle 3, and the adjustable cylindrical nozzle 3 In a cylindrical shape, the adjustable vane nozzle 2 is fixed around the cylinder of the adjustable cylindrical nozzle 3; the T-shaped lever is axially moved in the direction of the fixed nozzle, and the adjustable vane nozzle 2 and the adjustable cylindrical nozzle 3 are respectively driven from the fixed vane The end surface of the nozzle ring 1 and the hole protrude, the protruding amount of the adjustable cylindrical nozzle 3 lags behind the protruding amount of the adjustable blade nozzle 2; the height of the cylindrical nozzle will match the height of the turbine inlet according to the performance requirement, and the adjustable cylinder Nozzle 3 height and turbine 5 intake Height can be consistent.

The transmission device comprises two ball connecting rods 8, a transmission shaft base 9, a transmission shaft 10, a transmission plate 11 and a connecting seat 12, the T-shaped lever is provided with a radial hole, and the spherical connecting rod is inserted into the T-shaped lever, two A transmission shaft is connected between the spherical connecting rods, and one end of the transmission shaft is vertically fixed with a transmission plate. The outer side of the transmission plate is provided with a connecting column, and the middle portion of the transmission shaft is screwed to a driving shaft base. The transmission device adopts a positive pressure valve execution valve, a negative pressure valve actuator or a solenoid valve to connect the upper connecting column for direct movement, and through the transmission plate, the linear motion is converted into a rotary motion to drive the transmission shaft to rotate, and the rotation shaft rotates to reach the spherical shape. The connecting rod swings, because the spherical connection is connected with the 90° of the T-shaped lever, the T-shaped lever is linearly moved, and finally the adjustable vane nozzle and the adjustable cylindrical nozzle are controlled. In order to fix the rotating shaft, a drive shaft base is added to the shape of the intermediate body for axial movement of the fixed T-shaped lever, and the T-shaped lever is installed in the two bushings of special materials.

The adjustable cylindrical nozzle 3 is just at the outer circumference of the volute convex portion; the adjustable vane nozzle 2 is disposed at a cross direction with the fixed nozzle 13 in the same direction on the end surface of the fixed vane nozzle ring; the fixed nozzle 13 and the The shape of the blade nozzle 2 is in the shape of a wing; the angle of the inlet between the adjustable blade nozzle 2 and the fixed nozzle 13 and the exhaust gas flow ranges from 15° to 26°; the number of fixed blades 1 is 3-12, and the adjustable blade 2 The number of 3-12 can be set outside the blade, so the number of adjustable cylindrical nozzles 2 is 1-2; when the spherical link 8 is rotated by 25°, the T-shaped lever 6 moves linearly by 0-20 mm.

Three sets of nozzles are arranged in the scroll flow passage, and three sets of different nozzles are arranged in the flow passage of the turbine casing 4, and the two sets of hidden vane nozzles 2 and cylindrical nozzles 3 are used to reduce the cross-sectional area of the passage and reduce the lateral flow loss of the air flow. At the same time, it also adapts to the stable minimum exhaust gas flow conditions. The airflow can flow at the optimal airflow angle of the design at low speed and super high speed. When the torque is high, the working range of the booster high efficiency zone is expanded, and the fault point of the prior art solution is reduced several times, and the turbocharger reliability is improved. .

As shown in Fig. 17, the fixed vane nozzle ring 1 is fixed in the inner cavity of the turbine casing 4, and is stepped by the intermediate body 7; two T-shaped levers 6 are connected to the back surface of the nozzle plate, and the T-shaped lever 6 is inserted into the intermediate casing 7 In the fixed bushing, the other end of the T-shaped lever 6 is connected to the ball link 8, and the ball link 8 is connected to the transmission shaft 10 in the 90° direction. The connecting post 12 is connected to the device that drives the adjustable nozzle by the drive plate 11 on the drive shaft. The device for driving the adjustable nozzle comprises a venting valve 15 or a solenoid valve, the venting valve 15 or the electromagnetic valve is connected to the transmission rod 14, the transmission rod 14 is connected to the connecting column 12, and the venting valve 15 or the electromagnetic valve is connected and vented. The device moves the transmission rod connected to the electromagnetic valve or the deflation valve 15 in a linear motion by the intake air and the suction, and the transmission rod 14 drives the connecting column 12 to also move linearly. Since the transmission plate and the transmission shaft are connected by square holes, The driving plate is linearly moved to drive the transmission shaft 10 and the structure connected thereto to perform linear motion; in addition, the spherical connecting rod 8 connected to both sides of the transmission shaft 10 adopts a plug-in connection, that is, the two ends of the transmission shaft 10 are provided. The hole has a spherical connecting rod 8 inserted into the hole, and the ball-shaped connecting rod 8 has a shape of a vertebral body at the end of the insertion hole, and the end portion adopts a spherical body position larger than the hole diameter of the hole, and because of the shape of the vertebral body, the upper width is narrower, so The ball-shaped connecting rod 8 has a certain buffering margin when it is linearly moved, and has the function of protecting the entire driving device.

The specific embodiments of the present invention are not intended to limit the scope of the present invention, and any modifications, equivalents, and improvements which can be made by those skilled in the art are included in the present disclosure. Within the scope of protection of the invention.

Claims

An exhaust gas turbocharger system having a three-stage adjustable nozzle, the supercharger comprising a turbine casing (4), an intermediate casing (7) having a boss in the middle, a turbine (5) and a turbine drive shaft, The exhaust gas turbine component is mounted in the intermediate casing and fixed to the turbine casing, the turbine is connected to the turbine drive shaft, the convex portion of the intermediate casing is disposed at the bottom of the turbine, and the turbine is located in the volute cavity, wherein the increase The press further includes a hat-shaped fixed vane nozzle ring (1) having a hole in the middle, a plurality of adjustable vane nozzles (2), an adjustable cylindrical nozzle (3) and two T-shaped levers (6), the fixed vane nozzle a fixed nozzle (13) is disposed on the side end surface of the ring, the fixed nozzle is disposed in the exhaust gas flow path of the volute cavity and has a certain inclination angle with the flow direction of the exhaust gas, and the fixed blade nozzle ring is pressed by the intermediate case and the volute; Two T-shaped levers (6) pass vertically through the intermediate casing and are freely axially movable relative to the intermediate casing; one end of the T-shaped lever is connected to a transmission device that controls the T-shaped lever (6) for axial movement; two T An adjustable cylindrical nozzle (3) is connected between the type levers (6), and the adjustable cylindrical nozzle (3) is a cylindrical shape. The vane nozzle (2) is fixed around the cylinder of the adjustable cylindrical nozzle (3); the T-shaped lever moves axially along the fixed nozzle direction, and the adjustable vane nozzle (2) and the adjustable cylindrical nozzle (3) are respectively fixed from the fixed The end surface of the vane nozzle ring (1) and the inside of the hole extend, and the protruding amount of the adjustable cylindrical nozzle (3) lags behind the protrusion of the adjustable vane nozzle (2).
The exhaust gas turbocharger system with a three-stage adjustable nozzle according to claim 1, wherein the transmission comprises two spherical links (8), a transmission shaft base (9), and a transmission shaft (10), a transmission plate (11) and a connecting column (12), the T-shaped lever is provided with a radial hole, the spherical connecting rod is inserted into the T-shaped lever, and a transmission shaft is connected between the two spherical connecting rods, and the transmission One end of the shaft is vertically fixed with a transmission plate, and the outer side of the transmission plate is provided with a connecting column, and the outer diameter of the transmission shaft is installed in the inner hole of the transmission shaft seat, and the internal threads at both ends of the transmission shaft are connected with the two spherical connecting rods.
An exhaust gas turbocharger system with a three-stage adjustable nozzle according to claim 1, characterized in that the adjustable cylindrical nozzle (3) is just at the outer circumference of the volute boss.
An exhaust gas turbocharger system having a three-stage adjustable nozzle according to claim 1, wherein said adjustable vane nozzle (2) is disposed to intersect with a fixed nozzle (13), both of which are fixed vanes The direction on the end face of the nozzle ring is the same.
An exhaust gas turbocharger system having a three-stage adjustable nozzle according to claim 1, wherein the fixed nozzle (13) and the adjustable vane nozzle (2) are in the shape of a wing or a triangle.
An exhaust gas turbocharger system having a three-stage adjustable nozzle according to claim 1 or 4, characterized in that The intake angle between the adjustable vane nozzle (2) and the fixed nozzle (13) and the exhaust gas flow ranges from 15° to 26°.
An exhaust gas turbocharger system with a three-stage adjustable nozzle according to claim 1, wherein the number of fixed blades (1) is 3-12, and the number of adjustable blades (2) is 3-12. The number of adjustable cylindrical nozzles (3) is 1-2 pieces.
An exhaust gas turbocharger system with a three-stage adjustable nozzle according to claim 2, wherein the spherical link (8) is rotated by 25°, and the T-shaped lever (6) is linearly moved. 0 to 20 mm.