Variable-section nozzle ring with single serial blades

Abstract

The single tandem blade variable-section nozzle ring comprises a mounting disc, a driving disc and a blade assembly, the mounting disc and the driving disc are coaxially mounted, and a connecting mechanism is arranged between the mounting disc and the driving disc so that the driving disc can freely rotate around the central axis of the mounting disc; one end of the blade rod is connected with the blade assembly, and the other end of the blade rod is provided with a driven shifting fork. A clamping groove matched with the driven shifting fork is formed in the driving disc, the driven shifting fork is used for driving the blade rod to rotate synchronously, and then the rotating angle of the blade assembly is changed; each blade assembly comprises a first blade shape and a second blade shape, and a gap exists between the first blade shape and the second blade shape on the same blade rod. The nozzle ring has the beneficial effects that the blade assembly is divided into the first blade shape and the second blade shape with the gap, the windward area of the blade assembly is reduced, air resistance, waste gas acting loss and the overall weight of the blade assembly can be effectively reduced, and the working efficiency of the nozzle ring is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of nozzle rings, and in particular to a single-body tandem blade variable-section nozzle ring. Background Art

[0002] With rising international standards for vehicle emissions, gasoline-powered vehicles are increasingly using turbocharging technology to boost engine power to achieve energy conservation, emission reduction, and compliance with emission standards. Hydrogen-powered internal combustion engine vehicles are also leveraging turbocharging technology to achieve higher engine power, smoother combustion reactions, and energy conservation and emission reduction. The core component for turbocharging is the variable-section nozzle ring. Existing technologies for this technology suffer from high air resistance and significant exhaust gas work loss due to the blades in the nozzle ring.

[0003] Currently, common nozzle ring blades have a relatively large windward surface area. Furthermore, longer blades, due to the need to control airflow direction, have a certain curvature, resulting in a generally larger height-chord ratio and, consequently, a larger equivalent drag area. Conventional designs employ streamlined or aerodynamic blade designs. However, due to their larger size, the overall equivalent drag area is also large. Consequently, variable-section nozzle rings with large blades typically suffer from high air resistance and significant exhaust gas work losses. The existing art has not yet effectively addressed these issues by reducing windward drag. Therefore, improvements to existing variable-section nozzle rings are necessary. Summary of the Invention

[0004] One of the objectives of the present application is to provide a single-body tandem blade variable-section nozzle ring that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a single-body tandem blade variable-section nozzle ring, comprising a mounting plate, a driving plate and a blade assembly, the central axis of the mounting plate and the central axis of the driving plate are in the same straight line; a connecting mechanism is provided between the mounting plate and the driving plate, and the driving plate rotates freely around the central axis of the mounting plate through the connecting mechanism; a through-hole is provided on the mounting plate, and a blade rod is rotatably installed in the through-hole, one end of the blade rod is fixedly connected to the blade assembly, and the other end is fixedly installed with a driven fork; a card slot is provided on the driving plate to cooperate with the driven fork, and the driven fork is used to drive the blade rod to rotate synchronously, thereby rotating the blade assembly by a certain angle; the blade assembly includes a first leaf shape and a second leaf shape, and there is a gap between the first leaf shape and the second leaf shape on the same leaf rod.

[0006] Through the above arrangement, when the driving disk rotates around the mounting disk, the driven fork can rotate synchronously, and then the driven fork drives the blade assembly to rotate to different angles to change the gas flow direction; in addition, the larger-sized blade assembly is split into two first leaf shapes and second leaf shapes with a gap, which can effectively reduce air resistance and reduce exhaust gas work loss on the one hand; on the other hand, it can also effectively reduce the weight of the blade assembly to achieve a lightweight effect.

[0007] Preferably, the end of the driven fork distal from the blade rod extends into the slot, and the slot is provided with a first abutting surface for pushing the driven fork. With this arrangement, when the drive disc rotates, the relative position between the slot and the driven fork changes, and the first abutting surface pushes the driven fork to rotate, thereby changing the rotation angle of the blade assembly, thereby adjusting the flow rate and pressure of exhaust gas from a hydrogen fuel cell internal combustion engine vehicle or plug-in hybrid electric vehicle.

[0008] Preferably, a linkage mechanism is provided between the mounting plate and the driving plate, the linkage mechanism being configured to drive the driving plate to rotate relative to the mounting plate, such that the first abutting surface can push the driven fork to rotate synchronously with the driving plate. With this arrangement, the driving assembly can actively control the rotation direction and angle of the driving plate based on actual conditions. Subsequently, the first abutting surface compresses the driven fork and drives the blade stem to rotate synchronously, thereby changing the rotation angle of the blade assembly.

[0009] Preferably, the linkage mechanism includes an active shift fork and a shift fork slot. The active shift fork is rotatably mounted on the mounting plate, and the shift fork slot is provided in the driving plate. The active shift fork partially extends into the shift fork slot. A second contact surface is provided in the shift fork slot. The active shift fork rotates to push against the second contact surface, thereby causing the driving plate to rotate relative to the mounting plate. With this arrangement, the driving plate and the mounting plate can be caused to rotate relative to each other simply by controlling the rotation of the active shift fork.

[0010] Preferably, the connecting mechanism is a roller rotatably mounted on an end surface of the mounting plate. A groove is provided on the rolling surface of the roller, and the inner contour of the driving plate extends into the groove, allowing the driving plate to freely rotate about the central axis of the mounting plate. With this arrangement, the driving plate can be rotatably mounted to the mounting plate by inserting it into the groove. The rolling of the roller not only effectively reduces wear on the inner contour of the driving plate, but also enhances the stability of the connection between the driving plate and the mounting plate.

[0011] Preferably, the connecting mechanism is a shoulder disposed on the mounting plate, and the driving plate is provided with an inner hole that mates with the shoulder, wherein the diameter of the inner hole of the driving plate is larger than the diameter of the shoulder of the mounting plate. This arrangement provides a radial gap between the driving plate and the mounting plate, thereby reducing sticking.

[0012] Preferably, the number of the blade rods is multiple, and the multiple blade rods are spaced apart on the same circumference of the mounting plate, and the overall length of the blade assembly is greater than the distance between adjacent blade rods. In this arrangement, the multiple blade assemblies can be connected to each other by controlling the rotation angle of the blade rods, thereby minimizing the gap between adjacent blade assemblies.

[0013] Preferably, the plurality of blade rods are arranged at equal intervals on the same circumference of the mounting plate. This arrangement ensures that the specifications and sizes of the blade components are consistent, which is conducive to standardized manufacturing processes to improve production efficiency.

[0014] Preferably, the first leaf shape and the second leaf shape are both arc-shaped. Such an arrangement can ensure that the gas flows along the tangent of the first leaf shape and the second leaf shape, making the gas flow smoother.

[0015] Preferably, the first blade shape and the second blade shape are staggered on the blade rod, so as to ensure that the gas between the first blade shape and the second blade shape can flow along the tangent direction of the nozzle ring, thereby reducing the exhaust gas work loss.

[0016] Compared with the prior art, the present invention has the following advantages: (1) The present invention splits a larger blade assembly into two first blade shapes and second blade shapes with a gap. By reducing the windward area of ​​the blade assembly, the air resistance and exhaust gas work loss can be effectively reduced, thereby further improving the working efficiency of the nozzle ring. In addition, the overall weight of the blade assembly can be effectively reduced to achieve a lightweight effect.

[0017] (2) The blade assembly in the present invention has a maximum opening and a minimum opening. When the blade assembly is at the minimum opening, multiple blade assemblies can be connected to each other, reducing the gap between adjacent blade assemblies as much as possible.

[0018] (3) The active shift fork in the present invention rotates itself to drive the drive disc to rotate relative to the mounting disc, and then the slot squeezes and drives the driven shift fork to rotate synchronously, thereby changing the direction of the gas by changing the rotation angle of the blade assembly. The performance of the first and second blade shapes in controlling the direction of the airflow is the same as the control effect of a single integral blade shape. The blade assembly of the present application has the advantages of low resistance, light weight, and high exhaust efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a top view of the variable-section nozzle ring with single tandem blades in this application.

[0020] Figure 2 This is a bottom view of the single-body tandem blade variable cross-section nozzle ring in this application.

[0021] Figure 3 This is a side cross-sectional schematic diagram of the single-body tandem blade variable-section nozzle ring in this application.

[0022] Figure 4 This is a schematic diagram of the structure of the blade assembly in this application Figure 1 .

[0023] Figure 5 This is a schematic diagram of the structure of the blade assembly in this application Figure 2 .

[0024] Figure 6 This is a schematic diagram of the structure of the blade assembly in this application Figure 3 .

[0025] Figure 7 This is a top view of the variable-section nozzle ring with single tandem blades in this application when it is in the minimum opening state.

[0026] Figure 8 This is a three-dimensional schematic diagram of a single tandem blade variable cross-section nozzle ring in this application.

[0027] In the figure: 1. Mounting plate; 100. Leaf rod; 2. Driving plate; 21. Slot; 22. Fork slot; 200. Driven fork; 3. Blade assembly; 31. First leaf shape; 32. Second leaf shape; 300. Active fork; 400. Roller. DETAILED DESCRIPTION

[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0031] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0032] One aspect of the present application provides a single tandem blade variable cross-section nozzle ring, which is used in hydrogen fuel internal combustion engine vehicles or plug-in hybrid vehicles, and can also be used in hydrogen fuel cell air compressors or fuel engine turbochargers. Figure 1-Figure 3 As shown, one preferred embodiment includes a mounting plate 1, a drive plate 2, and a blade assembly 3. The central axis of the mounting plate 1 is collinear with the central axis of the drive plate 2. The mounting plate 1 and the drive plate 2 are connected by a connecting mechanism, allowing the drive plate 2 to freely rotate about the central axis of the mounting plate 1. A through-hole is provided on the end surface of the mounting plate 1, within which a blade rod 100 is rotatably mounted. One end of the blade rod 100 is fixedly connected to the blade assembly 3, and the other end is fixedly mounted with a driven fork 200. When the driven fork 200 rotates, it drives the blade rod 100 and the blade assembly 3 to rotate synchronously, thereby allowing the blade assembly 3 to rotate a certain angle on the drive plate 2. In addition, in order to enable the driven fork 200 to rotate along with the driving disc 2, a slot 21 cooperating with the driven fork 200 is provided on the driving disc 2. When the driving disc 2 rotates, the slot 21 rotates synchronously, and the driven fork 200 rotates along with the driving disc 2 in cooperation with the slot 21; that is, the angle of the blade assembly 3 can be changed by controlling the rotation angle of the driving disc 2, so that the nozzle ring can change the flow direction of the gas according to actual conditions.

[0033] In addition, in some embodiments of the present application, there are multiple blade rods 100, and corresponding blade assemblies 3, driven shift forks 200, and slots 21 are all multiple, and the number is consistent with the blade rods 100. As the blade assembly 3 rotates, the nozzle ring has a maximum opening and a minimum opening.

[0034] It is understandable that after the nozzle ring is mounted on the air compressor or turbocharger, the corresponding components of the air compressor or turbocharger, the mounting plate 1 and the blade assembly 3 can form an exhaust gas passage of the automobile.

[0035] Further, such as Figure 4 、 Figure 5 and Figure 6As shown, the blade assembly 3 includes a first blade shape 31 and a second blade shape 32, with a gap provided between the first blade shape 31 and the second blade shape 32 on the same blade rod 100. Separating the blade assembly 3 and arranging them in series can effectively reduce air resistance and exhaust gas work loss, while also effectively reducing the weight of the blade assembly 3, achieving a lightweight effect.

[0036] It should be noted that the term "single tandem blade" in this application is defined as a blade assembly 3 comprising two or more blades arranged in series and connected to a single blade stem 100 to form a single unit. Therefore, in other embodiments of this application, the blade assembly 3 may include other blades in addition to the first blade 31 and the second blade 32. The specific number of blades can be selected by those skilled in the art based on actual needs.

[0037] It is understood that the tandem blade structure provided by this application, compared to the previous single-row blade structure, breaks the larger blade into two or more smaller tandem blades. The tandem blades provide the same control effect as single-row blades in the nozzle ring air flow passage, but with a smaller resistance cross-section per unit length, thereby reducing air resistance and exhaust gas work losses, representing a significant improvement over the prior art.

[0038] In this embodiment, if Figure 2 As shown, one end of the driven fork 200 away from the blade rod 100 extends into the slot 21. A first fitting surface for squeezing the driven fork 200 is provided in the slot 21. When the driving disc 2 rotates, the relative position between the slot 21 and the driven fork 200 changes, and at this time, the first fitting surface fits with the driven fork 200; as the rotation angle of the driving disc 2 increases, the first fitting surface will further push the driven fork 200 to rotate, thereby driving the blade assembly 3 to rotate a certain angle. At this time, the size of the fluid channel between adjacent blade assemblies 3 (i.e., the opening of the nozzle ring) will also change, thereby realizing the adjustment of the flow rate and pressure of the exhaust gas of the hydrogen fuel internal combustion engine vehicle or the plug-in hybrid electric vehicle.

[0039] In order to enable the driving disk 2 to rotate relative to the mounting disk 1, in some embodiments of the present application, such as Figure 2 As shown, a linkage mechanism is provided between the mounting disk 1 and the driving disk 2, and the linkage mechanism is used to drive the driving disk 2 to rotate relative to the mounting disk 1 to ensure that the first fitting surface can squeeze the driven fork 200 to rotate synchronously with the driving disk 2, thereby causing the blade assembly 3 to rotate a certain angle.

[0040] Specifically, such as Figure 2As shown, the linkage mechanism includes an active shift fork 300 and a shift fork slot 22. The active shift fork 300 is rotatably mounted on the end surface of the mounting plate 1. The shift fork slot 22 is provided in the driving plate 2, and the active shift fork 300 partially extends into the shift fork slot 22 so that the active shift fork 300 can cooperate with the shift fork slot 22 for linkage. A second contact surface is provided in the shift fork slot 22. When the opening between the blade assemblies 3 needs to be adjusted, the active shift fork 300 pushes the second contact surface through its own rotation, causing the driving plate 2 to rotate relative to the mounting plate 1. Subsequently, the blade assemblies 3 rotate synchronously under the action of the driven shift fork 200.

[0041] In addition, the first fitting surface and the second fitting surface in the present application are both arched smooth surfaces, and the shape of the end of the active fork 300 extending into the fork groove 22 and the end of the driven fork 200 extending into the slot 21 are both nearly circular; to avoid jamming of the active fork 300 and the driven fork 200 when rotating.

[0042] In some embodiments of the present application, there are various specific structures of the connecting mechanism, including but not limited to the following two.

[0043] The first one: Figure 3 As shown, the connection mechanism is a roller 400, which is rotatably mounted on the end surface of the mounting plate 1. The inner contour of the driving plate 2 extends into the groove, ensuring that the driving plate 2 can be stably mounted on the mounting plate 1 and can also rotate freely around the central axis of the mounting plate 1. Of course, considering the stability of the connection, the number of rollers 400 is at least three.

[0044] The second type: the connection mechanism is a shoulder, the shoulder is arranged on the mounting plate 1, and the driving plate 2 is provided with an inner hole matching the shoulder, and the diameter of the inner hole of the driving plate 2 is larger than the diameter of the shoulder of the mounting plate 1.

[0045] It will be appreciated that the rolling connection of the roller 400 in the first connection mechanism described above not only enables smoother rotation between the drive disc 2 and the mounting disc 1, but also effectively reduces wear on the inner contour of the drive disc 2. Regarding the second connection mechanism described above, a gap is provided between the drive disc 2 and the mounting disc 1 in the radial direction of the mounting disc 1. This prevents the mounting disc 1 and the drive disc 2 from becoming stuck during operation of the nozzle ring, thereby improving the operational stability of the nozzle ring. Those skilled in the art can select between the two connection mechanisms described above based on practical needs. Of course, other connection mechanisms may also be selected as long as they ensure stable operation of the mounting disc 1 and the drive disc 2.

[0046] In this embodiment, if Figure 7 and Figure 8As shown, there are multiple leaf rods 100, and the multiple leaf rods 100 are arranged at intervals on the same circumference of the mounting plate 1, and the overall length of the blade assembly 3 is greater than the distance between adjacent leaf rods 100, to ensure that when the blade assembly 3 is rotated to the minimum opening and closing angle, the multiple blade assemblies 3 can be connected to each other, thereby reducing the gap between adjacent blade assemblies 3 as much as possible.

[0047] Furthermore, the multiple blade rods 100 are arranged at equal intervals on the same circumference of the mounting plate 1 to ensure that the specifications and sizes of the multiple blade assemblies 3 are consistent. During production, standardized manufacturing processes can be used to improve production efficiency. Of course, in other cases, the multiple blade rods 100 can also be arranged at unequal intervals.

[0048] In this embodiment, if Figure 6 As shown, the surfaces of the first and second lobes 31, 32 that are away from the central axis of the mounting plate 1 are both curved, ensuring that the gas flows along the tangent of the first and second lobes 31, 32, making the gas flow smoother. Furthermore, the first and second lobes 31, 32 are staggered on the vane rod 100, allowing the gas in the gap between the first and second lobes 31, 32 to flow along the tangent of the nozzle ring, reducing exhaust gas work loss.

[0049] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A single-body tandem blade variable cross-section nozzle ring, comprising a mounting plate (1), a drive plate (2) and a blade assembly (3), characterized in that: The central axis of the mounting disk (1) and the central axis of the driving disk (2) are in the same straight line, a connecting mechanism is provided between the mounting disk (1) and the driving disk (2), and the driving disk (2) is freely rotatable around the central axis of the mounting disk (1) via the connecting mechanism; The mounting plate (1) is provided with a through hole, in which a blade rod (100) is rotatably mounted, one end of the blade rod (100) is fixedly connected to the blade assembly (3), and the other end is fixedly mounted with a driven fork (200); the driving plate (2) is provided with a slot (21) that cooperates with the driven fork (200), and the driven fork (200) is used to drive the blade rod (100) to rotate synchronously, thereby rotating the blade assembly (3) by a certain angle; the blade assembly (3) includes a first leaf shape (31) and a second leaf shape (32), and a gap exists between the first leaf shape (31) and the second leaf shape (32) on the same blade rod (100).

2. The single-body tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: One end of the driven fork (200) away from the leaf rod (100) extends into the clamping groove (21), and a first fitting surface for pushing the driven fork (200) is provided in the clamping groove (21).

3. The single-body tandem blade variable cross-section nozzle ring according to claim 2, characterized in that: A linkage mechanism is provided between the mounting disk (1) and the driving disk (2), and the linkage mechanism is used to drive the driving disk (2) to rotate relative to the mounting disk (1), so that the first contact surface pushes the driven fork (200) to follow the driving disk (2) for synchronous rotation.

4. The single-body tandem blade variable cross-section nozzle ring according to claim 3, characterized in that: The linkage mechanism comprises an active shift fork (300) and a shift fork slot (22), wherein the active shift fork (300) is rotatably mounted on the mounting plate (1), the shift fork slot (22) is provided on the drive plate (2), and a portion of the active shift fork (300) extends into the shift fork slot (22); a second abutting surface is provided in the shift fork slot (22), and the active shift fork (300) pushes the second abutting portion by rotating itself, so that the drive plate (2) rotates relative to the mounting plate (1).

5. The single-body tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: The connecting mechanism is a roller (400), which is rotatably mounted on the end surface of the mounting plate (1). The rolling surface of the roller (400) is provided with a groove, and the inner contour of the driving plate (2) extends into the groove, so that the driving plate (2) can rotate freely around the central axis of the mounting plate (1).

6. The single-body tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: The connecting mechanism is a shaft shoulder, which is arranged on the mounting plate (1); an inner hole matching the shaft shoulder is provided on the driving plate (2); and the inner hole diameter of the driving plate (2) is larger than the shaft shoulder diameter of the mounting plate (1).

7. The single-body tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: There are multiple leaf rods (100), and the multiple leaf rods (100) are spaced apart on the same circumference of the mounting plate (1), and the overall length of the blade assembly (3) is greater than the distance between adjacent leaf rods (100).

8. The single-body tandem blade variable cross-section nozzle ring according to claim 7, characterized in that: A plurality of leaf rods (100) are arranged at equal intervals on the same circumference of the mounting plate (1).

9. The single-body tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: The first leaf shape (31) and the second leaf shape (32) are both arc-shaped.

10. The single-body tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: The first leaf shape (31) and the second leaf shape (32) are staggered on the leaf rod (100).

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