Variable-section nozzle ring with multi-row serial blades

Abstract

The multi-row serial 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 arranged, and the driving disc freely rotates around the central axis of the mounting disc through a connecting mechanism; a plurality of blade assemblies are arranged on the end face of the mounting disc at intervals and are arranged into at least two rows around the central axis of the mounting disc; wherein the multiple blade assemblies in the same row are located on the same reference circle of the mounting disc, and the blade assemblies in different rows are located on different reference circles of the mounting disc. The multi-row blade assembly has the beneficial effects that the effect of jointly controlling the nozzle ring air flow channel by the multi-row blade assembly is the same as that of a single-row blade, but the resistance section in unit length is smaller; therefore, the purposes of reducing air resistance and reducing waste gas acting loss are achieved; in addition, the multiple rows of blade assemblies are alternately arranged, and when the nozzle ring reaches the minimum opening degree, the multiple blade shapes are connected end to end so as to achieve the zero-clearance effect; and the application scene of the nozzle ring is further widened.

Description

Technical Field

[0001] The present application relates to the technical field of nozzle rings, and in particular to a nozzle ring with multiple rows of tandem blades and variable cross-sections. Background Art

[0002] With the advancement of science and technology, people are increasingly committed to environmental protection. Currently, international regulations on automobile emissions have been upgraded. To further reduce exhaust emissions, gasoline-powered vehicles require turbocharging technology to increase engine power per unit, achieve energy conservation and emission reduction, and meet emission standards. Hydrogen-powered internal combustion engine vehicles also require turbocharging technology to achieve increased engine power per unit, smooth combustion reactions, and reduce energy consumption and emissions. The core component for implementing turbocharging technology is the variable-section nozzle ring. However, the current nozzle ring blades are large, resulting in high air resistance and significant exhaust gas work losses.

[0003] Currently, to further reduce air resistance, blades are typically designed as single tandem blades to reduce air resistance and minimize exhaust gas work losses. However, because the gap between the two blade sections is not zero, single tandem blades cannot meet the requirements for zero blade gap at minimum opening. Therefore, there is room for further improvement in existing variable-section nozzle rings, particularly in reducing air resistance, minimizing exhaust gas work losses, and achieving zero blade gap at minimum opening. Summary of the Invention

[0004] One of the objectives of the present application is to provide a multi-row tandem blade variable cross-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 multi-row tandem blade variable cross-section nozzle ring, comprising a mounting plate, a driving plate and a blade assembly, wherein the mounting plate and the driving plate are coaxially arranged, a connecting mechanism is provided between the mounting plate and the driving plate, and the driving plate is freely rotated around the central axis of the mounting plate through the connecting mechanism; a plurality of blade assemblies are arranged at intervals on the end surface of the mounting plate, and the plurality of blade assemblies are arranged in at least two rows around the central axis of the mounting plate; wherein the plurality of blade assemblies in the same row are located on the same side of the mounting plate On the pitch circle, different rows of blade assemblies are located on different pitch circles of the mounting disk; the blade assembly includes a blade rod and a leaf shape, the blade rod is rotatably mounted on the mounting disk, and both ends of the blade rod extend out of the end surface of the mounting disk; one end of the blade rod is fixedly connected to the leaf shape, and the other end is fixedly connected to a driven fork, a slot is provided on the driving disk, and a connector is provided on the end of the driven fork away from the blade rod, and the connector is rotatably mounted in the slot; when the driving disk rotates, the connector rotates in the slot to drive the driven fork to drive the leaf shape to rotate a certain angle.

[0006] Through the above arrangement, the larger blades are split into two or more rows of blade assemblies. The effect of the multiple rows of blade assemblies jointly controlling the air flow channel of the nozzle ring is the same as that of a single row of blades, but the resistance cross-section per unit length is smaller, thereby achieving the purpose of reducing air resistance and reducing exhaust gas work loss; in addition, by rotating the drive disk, the driven fork can drive the blade assembly to rotate synchronously, thereby changing the flow direction of the gas.

[0007] Preferably, the driving disc is further provided with a driving mechanism for driving the driving disc to rotate relative to the mounting disc, thereby causing the driven shift fork to rotate synchronously with the driving disc. With this arrangement, the driving mechanism can provide power to the driving disc, causing the driving disc to actively rotate about the central axis of the mounting disc. Subsequently, the driven shift fork rotates under the force of the slot, thereby adjusting the angle of the blade assembly.

[0008] Preferably, the driving mechanism is an active shift fork, which is rotatably mounted on a mounting plate, and a shift fork slot is provided on the driving plate. The active shift fork partially extends into the shift fork slot and, through its own rotation, pushes against the shift fork slot, thereby causing the driving plate to rotate relative to the mounting plate. With this arrangement, the active shift fork can be driven to rotate, causing the end of the active shift fork to press against the shift fork slot, thereby driving the driving plate and the mounting plate to rotate relative to each other, making rotation of the driving plate more convenient.

[0009] Preferably, the plurality of blade assemblies are arranged in two rows, with blade assemblies in different rows arranged alternately around the circumference of the mounting plate. This arrangement allows the blade assemblies in different rows to cooperate with each other, thereby reducing the size of the blades to achieve the effect of reducing air resistance and weight.

[0010] Preferably, the blades rotate at an angle ranging from 0° to 42°, with a maximum opening and a minimum opening between two adjacent blades. This arrangement allows for a greater rotational range to control the openings between multiple blades, further improving the nozzle ring's control accuracy in regulating airflow.

[0011] Preferably, the length of the blade is greater than the distance between adjacent blade rods. When the nozzle ring is at its minimum opening, the multiple blades are connected end to end to achieve a zero gap effect. This arrangement allows zero gap to be achieved by rotating the blade assembly, further broadening the application scenarios of the nozzle ring.

[0012] Preferably, the blade itself is curved into an arc shape. Such an arrangement can ensure that the gas can flow tangentially to the blade, making the gas flow smoother.

[0013] Preferably, when the axis of the driven fork coincides with the outer circle normal of the driving disc, the center distance between the connector and the leaf rod is defined as r, the center distance from the central axis of the driving disc or the mounting disc to the connector is defined as R, and r1 / R1=r2 / R2=……=r n / R n Where n is the order in which the blade assemblies are arranged on the mounting plate from the outside to the inside. This arrangement ensures that the rotational arcs of the blade assemblies in multiple rows are the same, and prevents jamming between connectors in different rows when the drive plate and the mounting plate rotate relative to each other.

[0014] 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.

[0015] 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.

[0016] Compared with the prior art, the present invention has the following advantages: Larger blades will be split into two or more rows of tandem blades. These multiple rows of tandem blades collectively control the nozzle ring airflow, achieving the same effect as a single row of blades, but with a smaller cross-section per unit length. This reduces air resistance and exhaust gas work losses. Blade assemblies in different rows can be coordinated to achieve a smaller blade size, further reducing air resistance and weight.

[0017] Multiple rows of tandem blades also allow for a wider range of blade rotation angles. The blades in this application can rotate from 0° to 42°, allowing for greater control over the opening of multiple blades through a wider range of rotation, further improving the nozzle ring's airflow control accuracy. By alternating rows of blade assemblies, when the nozzle ring reaches its minimum opening, the blades connect end-to-end to achieve a zero-gap effect, further broadening the nozzle ring's applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure of the variable cross-section nozzle ring in this application is shown as follows Figure 1 .

[0019] Figure 2 This is a schematic top view of the drive disk in this application.

[0020] Figure 3 The overall structure of the variable cross-section nozzle ring in this application is shown as follows Figure 2 .

[0021] Figure 4 The overall structure of the variable cross-section nozzle ring in this application is shown as follows Figure 3 .

[0022] Figure 5 This is a schematic diagram of the structure of the variable-section nozzle ring in this application when it is at its maximum opening.

[0023] Figure 6 This is a schematic diagram of the structure of the variable-section nozzle ring in this application when it is at an intermediate opening.

[0024] Figure 7 This is a schematic diagram of the structure of the variable cross-section nozzle ring in this application when it is at its minimum opening.

[0025] Figure 8 It is a side cross-sectional view of the variable cross-section nozzle ring in this application.

[0026] In the figure: 1. Mounting plate; 100. Roller; 2. Driving plate; 21. Slot; 22. Fork slot; 3. Blade assembly; 31. Blade rod; 32. Blade shape; 4. Driven fork; 41. Connector; 5. Active fork. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] One aspect of the present application provides a multi-row tandem blade variable cross-section nozzle ring, such as Figure 1 、 Figure 2 and Figure 3 As shown, one preferred embodiment includes a mounting disk 1, a drive disk 2, and a blade assembly 3. The mounting disk 1 and the drive disk 2 are coaxially arranged, and a connecting mechanism is provided between the mounting disk 1 and the drive disk 2 so that the mounting disk 1 can freely rotate around the central axis of the mounting disk 1 through the connecting mechanism. A plurality of blade assemblies 3 are spaced apart on the end surface of the mounting disk 1, and the plurality of blade assemblies 3 are arranged in at least two rows in a ring around the central axis of the mounting disk 1; wherein, the plurality of blade assemblies 3 in the same row are located on the same pitch circle of the mounting disk 1, and the blades in different rows are located on different pitch circles of the mounting disk 1. The present application splits the larger single-row blades in the prior art into two or more rows of blade assemblies 3. The effect of the multiple rows of blade assemblies 3 jointly controlling the nozzle ring air flow channel is the same as that of the single-row blades, but the resistance cross-section per unit length is smaller; thereby achieving the purpose of reducing air resistance and reducing exhaust gas work loss.

[0032] Further, such as Figure 1 and Figure 3 As shown, the blade assembly 3 includes a blade 32 and a blade rod 31. The blade rod 31 is rotatably mounted on the mounting plate 1, with both ends of the blade rod 31 extending from the end surface of the mounting plate 1. One end of the blade rod 31 is fixedly connected to the blade 32, and the other end is fixedly connected to a driven fork 4. Rotation of the driven fork 4 drives the blade 32 to rotate synchronously. To ensure synchronous rotation of the driven fork 4 when the mounting plate 1 and the driving plate 2 rotate relative to each other, the driving plate 2 is provided with a slot 21. The driven fork 4 is provided with a connector 41 on the end away from the blade rod 31, and the connector 41 is rotatably mounted within the slot 21. When the driving plate 2 rotates, the connector 41 rotates within the slot 21, driving the driven fork 4 to rotate the blade 32 by a certain angle. The size of the fluid channel between adjacent blades 32 (also known as the nozzle ring opening) is changed, thereby adjusting the flow rate and pressure of the exhaust gas from a hydrogen internal combustion engine vehicle or plug-in hybrid electric vehicle.

[0033] It should be noted that in this application, the blade assemblies 3, driven shift fork 4, and retaining slots 21 are all multiple and identical in number; as the blade assemblies 3 rotate, the nozzle ring has a maximum opening and a minimum opening. Furthermore, the multiple blade assemblies 3 on the same pitch circle are equidistantly spaced along the circumference of the mounting plate 1; however, in actual applications, the multiple blade assemblies 3 on the same pitch circle can also be spaced unequally depending on the operating conditions.

[0034] In this embodiment, if Figure 3 As shown, in order to enable the driving disk 2 to rotate relative to the mounting disk 1, a driving mechanism for cooperating with the driving disk 2 is installed on the mounting disk 1. The driving mechanism can provide power to the driving disk 2, so that the driving disk 2 can actively rotate around the central axis of the mounting disk 1, and then the driven fork 4 rotates under the push of the slot 21, thereby completing the adjustment of the opening size of the blade assembly 3.

[0035] Specifically, such as Figure 3 As shown, the driving mechanism is an active shift fork 5, which is rotatably mounted on the mounting plate 1. The driving plate 2 is provided with a shift fork slot 22, and the active shift fork 5 partially extends into the shift fork slot 22. When the nozzle ring opening needs to be adjusted, the active shift fork 5 can be rotated. At this time, the end of the active shift fork 5 extending into the shift fork slot 22 can generate thrust on the side wall of the shift fork slot 22, thereby driving the driving plate 2 and the mounting plate 1 to rotate relative to each other.

[0036] In this embodiment, if Figure 4 As shown, the plurality of blade assemblies 3 are arranged in two rows on the mounting plate 1, and the blade assemblies 3 of different rows are alternately arranged along the circumference of the mounting plate 1 so that the leaf shapes 32 of different rows can fit together; in addition, after the blades of different rows are alternately arranged, the size of the leaf shape 32 can also be designed to be smaller, thereby achieving the effect of reducing air resistance and lightweighting.

[0037] Furthermore, the rotation angle range of each blade 32 is 0° to 42°, and the angles of rotation of multiple blades 32 are consistent each time; through the synchronous rotation of multiple blade assemblies 3, the maximum opening and minimum opening are achieved between two adjacent blades 32. Compared with traditional single-row blades, the blades 32 in this application are smaller in size, and combined with the multi-row design, the blades 32 have a larger rotation angle. While the blades 32 in this application and the blades in the prior art have the same maximum opening, the blades 32 in this application need to rotate a larger angle. In other words, when rotating at the same angle, the nozzle ring in this application adjusts the opening stroke to a smaller extent, thereby further improving the control accuracy of the nozzle ring in regulating the airflow.

[0038] It is understandable that the rotation angle range of the blade shape 32 is related to the number of arrangements of the blade components 3. When the number of arrangements of the blade components 3 changes, the rotation angle range of the blade shape 32 should be appropriately changed.

[0039] In this embodiment, if Figure 5 、 Figure 6 and Figure 7 As shown, the length of the blade 32 is greater than the distance between adjacent blade rods 31. When the nozzle ring is at the minimum opening, multiple blade shapes 32 are connected end to end to achieve the effect of zero gap. The multi-row blade assembly 3 in this application overcomes the disadvantage that the single-piece serial blade cannot meet the application scenario of zero blade gap at the minimum opening because the gap between the two parts of the blade shape 32 is not zero.

[0040] Furthermore, the blade 32 itself is bent into an arc shape. When the gas flows in the nozzle ring, the gas can flow along the tangent of the blade 32, making the gas flow smoother and further reducing the exhaust gas work loss.

[0041] In this embodiment, if Figure 3 As shown, when the axis of the driven fork 4 coincides with the outer circle normal of the driving disc 2, the center distance between the connector 41 and the blade 31 is defined as r, and the center distance from the center axis of the driving disc 2 or the mounting disc 1 to the connector 41 is R, r1 / R1=r2 / R2=……=r n / R n , where n is the order of arrangement of the blade assemblies 3 from the outside to the inside. By setting the ratio of the center distance between the connector 41 and the blade rod 31 and the center distance between the central axis of the drive disc 2 or the mounting disc 1 and the connector 41 to be consistent, the rotation arc of the blade assemblies 3 arranged in multiple rows can be guaranteed to be the same. When the drive disc 2 and the mounting disc 1 rotate relative to each other, it can prevent the connectors 41 in different rows from getting stuck.

[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 8 As shown, the connection mechanism is a roller 100, 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 is stably mounted on the mounting plate 1 and can also rotate freely about the central axis of the mounting plate 1. In addition, considering the stability of the connection, the number of rollers 100 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 100 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] 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 multi-row 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 mounting disk (1) and the driving disk (2) are coaxially arranged, 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; A plurality of blade assemblies (3) are arranged at intervals on the end surface of the mounting plate (1), and the plurality of blade assemblies (3) are arranged in at least two rows around the central axis of the mounting plate (1); wherein the plurality of blade assemblies (3) in the same row are located on the same pitch circle of the mounting plate (1), and the blade assemblies (3) in different rows are located on different pitch circles of the mounting plate (1); The blade assembly (3) comprises a blade rod (31) and a blade shape (32), wherein the blade rod (31) is rotatably mounted on the mounting plate (1), and both ends of the blade rod (31) extend out of the end surface of the mounting plate (1); one end of the blade rod (31) is fixedly connected to the blade shape (32), and the other end is fixedly connected to a driven fork (4); a slot (21) is provided on the driving plate (2), and a connector (41) is provided on the end of the driven fork (4) away from the blade rod (31), and the connector (41) is rotatably mounted in the slot (21); when the driving plate (2) rotates, the connector (41) rotates in the slot (21), so as to drive the driven fork (4) to drive the blade shape (32) to rotate a certain angle.

2. The multi-row tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: A driving mechanism is also provided on the driving disc (2), and the driving mechanism is used to drive the driving disc (2) to rotate relative to the mounting disc (1), so that the driven shift fork (4) rotates synchronously with the driving disc (2).

3. The multi-row tandem blade variable cross-section nozzle ring according to claim 2, characterized in that: The driving mechanism is an active shift fork (5), which is rotatably mounted on the mounting plate (1), and a shift fork groove (22) is provided on the driving plate (2); the active shift fork (5) partially extends into the shift fork groove (22) and pushes the shift fork groove (22) by rotating itself, so that the driving plate (2) rotates relative to the mounting plate (1).

4. The multi-row tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: The number of rows formed by the plurality of blade assemblies (3) is two, and blade assemblies (3) in different rows are alternately arranged on the circumference of the mounting plate (1).

5. The multi-row tandem blade variable cross-section nozzle ring according to claim 4, characterized in that: The rotation angle range of the leaf shapes (32) is 0° to 42°, and there is a maximum opening and a minimum opening between two adjacent leaf shapes (32).

6. The multi-row tandem blade variable cross-section nozzle ring according to claim 5, characterized in that: The length of the blade shape (32) is greater than the distance between adjacent blade rods (31), and when the nozzle ring is at the minimum opening, the multiple blade shapes (32) are connected end to end to achieve a zero gap effect.

7. The multi-row tandem blade variable cross-section nozzle ring according to claim 6, characterized in that: The leaf shape (32) itself is bent into an arc shape.

8. The multi-row tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: When the axis of the driven fork (4) coincides with the outer circle normal of the driving disc (2), the center distance between the connector (41) and the leaf rod (31) is defined as r, the center distance between the center axis of the driving disc (2) or the mounting disc (1) and the connector (41) is defined as R, and r1 / R1=r2 / R2=……=r n / R n ; wherein n is the arrangement order of the blade assemblies (3) on the mounting plate (1) from the outside to the inside.

9. The multi-row tandem blade variable cross-section nozzle ring according to claim 1, characterized in that: The connecting mechanism is a roller (100), which is rotatably mounted on the end surface of the mounting plate (1). The rolling surface of the roller (100) 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).

10. The multi-row 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).

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