Variable-section nozzle ring of timing shifting fork with unequal included angles

Abstract

The variable-section nozzle ring comprises a blade, a shifting fork assembly, a driving disc and a mounting disc, the driving disc and the mounting disc are coaxially arranged, the mounting disc is sleeved with the driving disc, and the shifting fork assembly is connected with the blade; a shifting fork groove is formed in the driving disc, one end of the shifting fork assembly is rotationally connected with the mounting disc, and the other end is arranged in the shifting fork groove; the shifting fork assembly comprises at least three timing shifting forks which are arranged at intervals in the circumferential direction. A connecting line of the blade hole and the end part of the blade is taken as a blade reference line, a first included angle is formed between the center line of the timing shifting fork and the blade reference line, and a second included angle is formed between a radial connecting line of the center of the mounting disc and the blade hole and the center line of the timing shifting fork; the first included angle and the second included angle of each timing shifting fork in each shifting fork assembly are different in size. When the nozzle ring is in the opening degrees of different gears, at least one timing shifting fork in each shifting fork assembly provides radial supporting force for the driving disc, the radial positioning accuracy of the driving disc is improved, and the transmission accuracy is improved.

Description

Technical Field

[0001] The present application relates to the technical field of nozzle rings, and in particular to a nozzle ring with a variable cross-section and an unequal angle timing fork. Background Art

[0002] The variable cross-section nozzle ring of the turbocharger in the prior art includes a driving disk, a mounting disk, a shift fork and blades, etc. The driving disk rotates around the mounting disk, and the shift fork is connected to the blades. When the driving disk rotates, the shift fork drives the blades to rotate. Different rotation angles of the blades correspond to different openings, thereby realizing the adjustment of the opening change of the nozzle ring.

[0003] In order to avoid the jamming of the driving disk when rotating relative to the mounting disk, most existing nozzle rings have a gap between the inner hole of the driving disk and the shoulder of the mounting disk, so as to reduce the fit between the driving disk and the mounting disk, thereby avoiding jamming. However, in such a nozzle ring structure, the mounting disk lacks radial positioning accuracy for the driving disk, which will result in a large offset between the center line of the driving disk and the center line of the mounting disk, resulting in inaccurate radial positioning between the driving disk and the mounting disk, and inaccurate transmission, which affects the working efficiency of the nozzle ring.

[0004] Therefore, the nozzle ring in the prior art has room for further improvement. Summary of the invention

[0005] In view of this, in order to solve the technical problems in the above-mentioned prior art that the radial positioning accuracy between the inner hole of the driving disk and the mounting disk is poor and the transmission accuracy is low, the present application provides a variable-section nozzle ring with unequal angle timing, which includes a timing fork assembly, and the timing fork assembly is used to provide a radial force to the driving disk, thereby improving the radial positioning accuracy of the driving disk and improving the transmission accuracy.

[0006] The present application provides a variable cross-section nozzle ring with unequal angle timing forks, comprising blades, a fork assembly, a coaxially arranged drive disk and a mounting disk, wherein the drive disk is sleeved on the mounting disk, and the fork assembly is connected to the blades;

[0007] The driving disk is provided with a shift fork groove, one end of the shift fork assembly is rotatably connected to the mounting disk, and the other end is arranged in the shift fork groove;

[0008] The shift fork assembly comprises at least three timing shift forks, and the timing shift forks are arranged at intervals along the circumferential direction;

[0009] The connection line between the blade hole and the blade end is taken as the blade reference line, a first angle is formed between the timing fork center line and the blade reference line, and a second angle is formed between the radial connection line between the mounting plate center and the blade hole and the timing fork center line;

[0010] The first included angle and the second included angle of each timing fork in each group of fork assemblies are different in size;

[0011] Wherein, when the variable-section nozzle ring of the unequal-angle timing fork is in different gear openings, at least one timing fork in each group of fork assemblies provides radial support force to the drive disc.

[0012] Compared with the prior art, the variable-section nozzle ring of the unequal-angle timing fork of the present application passes through a timing fork assembly, and the timing fork assembly includes at least three timing forks, wherein the first angle and the second angle of each timing fork in each group of fork assemblies are different, so that when the nozzle ring is in different opening states, at least one timing fork in each group of fork assemblies can provide radial support force to the drive disk, while ensuring the radial clearance between the inner hole of the drive disk and the mounting disk to reduce sticking, it can also provide radial support to the drive disk, thereby ensuring the radial positioning accuracy of the drive disk, reducing the offset and offset probability between the center line of the drive disk and the center of the mounting disk, thereby improving the transmission accuracy; at the same time, setting the angle between the blade and the timing fork to be unequal can also ensure that when the blade follows the timing fork to rotate, the rotation angles of all blades can be coordinated and unified to cooperate to form different openings.

[0013] Preferably, the fork groove opens on the side wall of the driving disk facing the mounting disk, and the fork groove includes a middle restraining wall;

[0014] The timing fork comprises a middle supporting end. When the middle supporting end is in contact with the middle restraining wall, the timing fork is used to provide radial supporting force to the driving disc.

[0015] Preferably, the number of timing forks in each group of fork assemblies is n, and n≥3;

[0016] When n is an odd number, the difference between the first angles of two adjacent timing forks from the middle opening timing fork toward the maximum opening timing fork is │B / (n-1)│;

[0017] From the middle opening timing fork toward the minimum opening timing fork, the difference between the first angles of two adjacent timing forks is │B / (n-1)+Am│;

[0018] Among them, the angle between the intermediate opening timing fork and the blade reference line is β, Am is the correction compensation value of the angle between the mth fork and the blade calculated from the maximum opening timing fork to the minimum opening timing fork, Am = β*(m+1) / 100;

[0019] Among them, with the center of the blade hole as the rotation point, the travel angle of the timing fork from the minimum opening to the maximum opening is B.

[0020] Preferably, the fork assembly comprises a first timing fork, a second timing fork and a third timing fork which are sequentially arranged along the same circumferential direction;

[0021] When the middle supporting end of the first timing fork is in contact with the middle constraint wall, the variable cross-section nozzle ring of the unequal angle timing fork is in the minimum opening gear position;

[0022] When the middle supporting end of the second timing fork is in contact with the middle constraint wall, the variable cross-section nozzle ring of the unequal angle timing fork is in a medium opening gear position;

[0023] When the middle supporting end of the third timing fork is in contact with the middle constraint wall, the variable cross-section nozzle ring of the unequal angle timing fork is in the maximum opening gear position.

[0024] Preferably, the first included angle of the first timing fork is θ11;

[0025] The first included angle of the second timing fork is θ12;

[0026] The first included angle of the third timing fork is θ13;

[0027] Among them, when the variable-section nozzle ring of the unequal-angle timing fork is at different openings, θ11≠θ12≠θ13.

[0028] Preferably, the first angle θ12 of the second timing fork is β, wherein θ11 is β+α, θ13 is β-α-A, and A is 0.04β.

[0029] Preferably, the fork groove further comprises side end restraining walls, and the side end restraining walls are arranged at both ends of the middle restraining arm;

[0030] The middle constraint wall faces the center line direction of the mounting plate, and an angle θ4 is formed between the side constraint wall and the middle constraint wall, and 60°<θ4<100°.

[0031] Preferably, the timing fork further comprises side support ends, the side support ends are arranged at both ends of the middle support end, and the outer side walls of the side support ends are smooth arc surfaces;

[0032] Wherein, the side end constraint wall is used to fit with the side support end.

[0033] Preferably, the timing fork comprises a limiting portion and a connecting portion, the limiting portion is connected to the connecting portion, and the limiting portion is located in the timing groove;

[0034] The connecting portion is rotatably connected to the mounting plate via a blade rod, and the blade hole is coaxially arranged with the blade rod.

[0035] Preferably, the fork assemblies are at least three groups, and the fork assemblies are arranged at intervals along the same circumferential direction;

[0036] The mounting plate is provided with a shaft shoulder, and the driving plate is provided with an inner hole, and the diameter of the inner hole is larger than the outer diameter of the shaft shoulder.

[0037] The present invention provides a nozzle ring with a variable cross-section fork with an unequal angle, which has at least the following technical effects:

[0038] 1. By setting the included angles between the timing fork and the blade to be different, the angles between the timing forks of each fork assembly can be set to be different, that is, when the nozzle ring is at the same opening, the center line of each timing fork in each fork assembly has a different angle with the radial direction, so that when the nozzle ring is at different gear openings, at least one timing fork in each fork assembly can provide radial support force to the drive disk, thereby improving the radial positioning accuracy of the drive disk and thus improving the transmission accuracy;

[0039] 2. By setting exactly three timing forks in each group of fork assemblies to correspond to the minimum, medium and maximum opening gear positions respectively, when the middle supporting end of each timing fork is in contact with the middle constraint wall of the fork groove, it corresponds to one of the opening gear positions. The regularity is high, the structure is relatively simple, but the radial positioning of the drive plate at each opening gear position can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the minimum opening gear of the variable cross-section nozzle ring of the unequal angle timing fork provided in one embodiment of the present application;

[0041] Figure 2 It is a structural schematic diagram of a medium gear position of the opening of a variable-section nozzle ring of an unequal-angle timing fork provided in an embodiment of the present application;

[0042] Figure 3 It is a structural schematic diagram of the maximum opening gear position of the variable cross-section nozzle ring of the unequal angle timing fork provided in one embodiment of the present application;

[0043] Figure 4 It is a partial structural schematic diagram of a medium gear position of the opening of a variable-section nozzle ring of an unequal-angle timing fork provided in an embodiment of the present application;

[0044] Figure 5 yes Figure 1 A schematic diagram of a local A enlargement;

[0045] Figure 6 It is a schematic cross-sectional structure diagram of a variable-section nozzle ring of an unequal-angle timing fork provided in one embodiment of the present application;

[0046] Figure 7 yes Figure 6 A magnified schematic diagram of local B.

[0047] Reference numerals: 1, unequal angle timing fork variable cross-section nozzle ring;

[0048] 11. driving plate; 12. mounting plate; 13. shift fork assembly; 14. blade; 15. blade rod; 16. distance sleeve; 17. rear cover plate; 18. radial positioning pin;

[0049] 111, fork groove; 1111, middle restraining wall; 1112, side restraining wall;

[0050] 121, shaft shoulder;

[0051] 131. First timing fork; 132. Second timing fork; 133. Third timing fork; 134. Middle supporting end; 135. Side supporting end; 136. Limiting portion; 137. Connecting portion. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0053] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0054] Those skilled in the art should understand that, in the disclosure of the present application, the orientation or positional relationship indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0055] The present application is further described in detail below in conjunction with the accompanying drawings. Figures 1 to 7 illustrate.

[0056] The present application provides a variable cross-section nozzle ring 1 with unequal angle timing fork, such as Figure 1 , Figure 6 to Figure 7As shown, the variable cross-section nozzle ring 1 of the unequal angle timing fork (hereinafter referred to as the nozzle ring 1) includes a mounting plate 12, a driving plate 11, blades 14, a blade rod 15 and at least three sets of fork assemblies 13, the driving plate 11 is rotatably connected to the mounting plate 12, the driving plate 11 and the mounting plate 12 are coaxially arranged, the mounting plate 12 is provided with a shoulder 121, the driving plate 11 is provided with an inner hole, the driving plate 11 is correspondingly sleeved on the shoulder 121 of the mounting plate 12, wherein the inner hole diameter of the driving plate 11 is larger than the outer diameter of the shoulder 121, and in the radial direction, there is a gap between the driving plate 11 and the mounting plate 12, thereby reducing the jamming;

[0057] like Figures 4 to 5 , Figure 7 As shown, a fork groove 111 is provided on the driving disk 11, and the fork groove 111 is located at one end of the driving disk 11 close to the center, and the fork groove 111 is open on the side wall of the driving disk 11 facing the mounting disk 12; the fork assemblies 13 are arranged at intervals along the same circumferential direction, one end of the fork assembly 13 is rotatably connected to the mounting disk 12, and the other end is located in the fork groove 111, and the fork assembly 13 acts between the driving disk 11 and the mounting disk 12, and is used to radially support and circumferentially support the driving disk 11, so that the radial gap between the inner hole of the driving disk 11 and the shaft shoulder 121 of the mounting disk 12 can be maintained, thereby reducing the jamming of the nozzle ring 1; as shown in 7, the blade rod 15 is arranged axially, the blade rod 15 passes through the mounting disk 12, and the blade rod 15 is rotatably connected to the mounting disk 12; one end of the blade rod 15 exceeds the surface of the mounting disk 12 and is fixedly connected to the fork assembly 13, and the other end is fixedly connected to the blade 14; as shown in Figure 1 As shown, the driving disc 11 is provided with an active fork groove 111, and the active fork groove 111 and the card groove are distributed on the driving disc 11 at intervals along the circumferential direction. The active fork groove 111 is used to install the active fork. The active fork provides power to drive the driving disc 11 to rotate relative to the mounting disc 12, thereby driving the fork to rotate, and the fork drives the blade rod 15 to rotate, further causing the blade 14 to rotate a certain angle, and the size of the fluid channel between adjacent blades 14 is changed, thereby realizing the regulation of the flow rate and pressure of the exhaust gas (automobile exhaust) of the fuel engine or hydrogen fuel cell.

[0058] In particular, in this application, if Figure 4 , Figure 5As shown, the fork assembly 13 includes at least three timing forks, which are arranged at intervals along the circumferential direction, and each timing fork is connected to a corresponding blade rod 15 and a corresponding fork groove 111; wherein the blade 14 is provided with a blade 14 hole connected to the blade rod 15, and the center lines of the blade 14 hole, the blade rod 15 and the connection hole of the timing fork are on the same straight line; with the line connecting the blade 14 hole and the end of the blade 14 as the reference line, there is a first angle between the center line of the timing fork and the reference line of the blade 14, wherein the first angle between the center line of each timing fork in each group of fork assemblies 13 and the corresponding blade 14 reference line is different; as shown Figure 4 As shown, there is a second angle between the radial line connecting the center of the mounting disk 12 and the hole of the blade 14 and the center line of the timing fork. When the nozzle ring 1 is in the same gear opening, the second angle of each timing fork of the same group of fork assemblies 13 is different; the first angle cooperates with the second angle to ensure that when the blade 14 is driven to rotate by the timing fork, all the blades 14 cooperate together to form the opening required by the nozzle ring 1, so that when the nozzle ring 1 is in different gear openings, at least one timing fork in each group of fork assemblies 13 provides radial support force to the drive disk 11, thereby maintaining the radial gap between the drive disk 11 and the mounting disk 12, reducing the jamming of the drive disk 11 and the mounting disk 12, and improving the radial positioning accuracy of the drive disk 11, reducing the offset and offset probability between the center line of the drive disk 11 and the center of the mounting disk 12, thereby improving the transmission accuracy.

[0059] Furthermore, the fork assembly 13 is further described; in the present application, the number of timing forks in each fork assembly 13 is n, and n≥3; in the present embodiment, with the center of the blade 14 hole as the rotation point, when the opening of the nozzle ring 1 changes from minimum to maximum, the angle of the rotation stroke of each timing fork is B, and the rotation stroke of each timing fork is the same. It should be noted that in the present application, the opening gear of the nozzle ring 1 is set to n gears according to the number of timing forks in each group of fork assemblies 13. Specifically, when each timing fork in each group of fork assemblies 13 provides radial support force to the drive disk 11, it corresponds to an opening gear in the nozzle ring 1, thereby ensuring that when the nozzle ring 1 is in each gear, its drive disk 11 can be radially supported to ensure the stability of the drive disk 11 and the working stability of the nozzle ring 1; however, it should be noted that in each group of fork assemblies 13, the timing forks at the two ends correspond to the minimum opening and the maximum opening respectively, and the middle one is in principle evenly distributed according to the stroke. When the number of forks is not an integer multiple of a group, it can be appropriately adjusted to make a selection and combination.

[0060] In this embodiment, when n is an odd number, the difference between the first angles of two adjacent timing forks from the middle opening timing fork toward the maximum opening timing fork is |B / (n-1)|;

[0061] From the middle opening timing fork toward the minimum opening timing fork, the difference between the first angles of two adjacent timing forks is │B / (n-1)+Am│;

[0062] Among them, the angle between the intermediate opening timing fork and the reference line of the blade 14 is β, Am is the correction compensation value of the angle between the mth fork and the blade 14 calculated from the maximum opening timing fork to the minimum opening timing fork, Am = β*(m+1) / 100, β is the angle between the intermediate opening timing fork and the blade 14.

[0063] like Figure 5 As shown, in the present application, the fork groove 111 is open on the side wall of the driving disk 11 facing the mounting disk 12, and the fork groove 111 includes a middle constraint wall 1111 and a side constraint wall 1112, the middle constraint wall 1111 faces the center line direction of the mounting disk 12, and the side constraint walls 1112 are arranged at both ends of the middle constraint arm, so that the fork groove 111 is roughly a rectangular n-shaped structure, and the fork groove 111 is a symmetrical structure; the number of fork grooves 111 corresponds to the number of timing forks; the timing fork includes a middle support end 134 and a side support portion, the middle support end 134 is opposite to the middle constraint wall 1111 of the fork groove 111, the middle constraint wall 1111 is used to limit the middle support end 134, and when the middle support end 134 is in contact with the middle constraint wall 1111, as shown Figure 4 As shown, the middle support end 134 provides radial (normal) support force through the blade 14 hole to the driving disk 11 through the middle constraint wall 1111;

[0064] The side support ends 135 are arranged at both ends of the middle support end 134, and the side support ends 135 are opposite to the side end restraining walls 1112. The outer side walls of the side support ends 135 have an inward trend, and the outer side walls of the side support ends 135 are smooth arc surfaces, which can reduce the resistance of the timing fork relative to the fork groove 111 when the timing fork rotates relative to the fork groove 111, thereby improving the smoothness of rotation. In this embodiment, there is an angle θ4 between the middle restraining wall 1111 and the side end restraining wall 1112, 60°<θ4<1 00°, that is, the angle between the middle constraint wall 1111 and the side constraint wall 1112 is moderate, the middle constraint wall 1111 is opposite to the center line of the mounting plate 12, so that the side constraint wall 1112 is roughly parallel to the radial direction; wherein, the middle constraint wall 1111 is basically a planar structure, and the end face of the middle support end 134 facing the middle constraint wall 1111 is also basically a planar structure, and the contact area between the two is large, so that the timing fork can provide the drive plate 11 with a relatively stable supporting force.

[0065] Furthermore, the angle of θ4 is preferably one of 86°, 88°, and 90°. In this embodiment, θ4 is 90°.

[0066] like Figure 5 , Figure 7 As shown, in the present application, the timing fork includes a limiting portion 136 and a connecting portion 137, the connecting portion 137 is a cylindrical structure as a whole, the limiting portion 136 is a fan-shaped structure as a whole, the connecting portion 137 is rotatably connected to the mounting disk 12 through the vane rod 15, the limiting portion 136 is located in the fork groove 111, and the end of the limiting portion 136 away from the driving disk 11 is connected to the connecting portion 137; the middle support end 134 and the side support end 135 are both arranged on the limiting portion 136, the width of the portion of the limiting portion 136 close to the connecting portion 137 is smaller than the opening width of the fork groove 111, and its two sides are inward-retracted arc structures to prevent the timing fork from abutting against the open end surface of the fork groove 111 when rotating.

[0067] Further, based on any of the above embodiments, the fork assembly 13 is further described; Figures 1 to 4 As shown, in this embodiment, the fork assembly 13 includes a first timing fork 131, a second timing fork 132 and a third timing fork 133 which are sequentially arranged along the same circumferential direction;

[0068] The first included angle of the first timing fork 131 is θ11, and the second included angle of the first timing fork 131 is θ21;

[0069] The first included angle of the second timing fork 132 is θ12, and the second included angle of the second timing fork 132 is θ22;

[0070] The first included angle of the third timing fork 133 is θ13, and the second included angle of the third timing fork 133 is θ23;

[0071] Among them, θ11≠θ12≠θ13; when the nozzle ring 1 is at different openings, θ11+θ12+θ13=K, that is, when the nozzle ring 1 is at any gear opening, the absolute values ​​of the first angles of the three timing forks are all equal. Among them, the specific K value is determined by the number of fork assemblies 13 on the nozzle ring 1 and the number of timing forks contained in each group of fork assemblies 13, so as to ensure that the fork assembly 13 can provide radial force to the drive disk 11 at each gear opening, and can also ensure that the blade 14 of the nozzle ring 1 meets the opening requirement , to ensure the working performance of the nozzle ring 1; in the present embodiment, the first angle θ12 of the second timing fork 132 is β, wherein θ11 is β+α, θ13 is β-α-A, A is 0.04β, α is 0.5B, wherein B is the rotation angle of the fork around the center line of the blade stem 15 of the blade 14 from the minimum opening to the maximum opening, and A is the fine-tuning value for adjusting the size of θ13, so that the first timing fork 131131, the second timing fork 132132, and the third timing fork 133133 can form a circulation unit.

[0072] In this embodiment, the fork assembly 13 is arranged in three groups, and each group of the fork assembly 13 includes three timing forks. Therefore, the nozzle ring 1 has precise opening adjustment with three gears, namely, the minimum opening gear, the medium opening gear and the maximum opening gear; the minimum opening gear and the medium opening gear can be adjusted steplessly; the medium opening gear and the maximum opening gear can also be adjusted steplessly; the overall movement of the nozzle ring is more coordinated and smooth, and the transmission of a specific opening is more precise, thereby improving the efficiency and performance of the nozzle ring.

[0073] Specifically, Figure 1 As shown, when the middle supporting end 134 of the first timing fork 131 is in contact with the middle restraining wall 1111, the first timing fork 131 provides radial supporting force to the driving disk 11, and the nozzle ring 1 is in the minimum opening gear position, θ21 = 0°, θ22 = α°, θ23 = α°;

[0074] like Figure 2 As shown, when the middle supporting end 134 of the second timing fork 132 is in contact with the middle restraining wall 1111, the second timing fork 132 provides radial supporting force to the driving disk 11, and the nozzle ring 1 is in a medium opening gear position, θ21 = α°, θ22 = 0°, θ23 = α°;

[0075] like Figure 3 As shown, when the middle supporting end 134 of the third timing fork 133 is in contact with the middle restraining wall 1111, the third timing fork 133 provides radial supporting force to the driving disk 11, and the nozzle ring 1 is in the maximum opening gear position, θ21 = α°, θ22 = α°, θ23 = 0°;

[0076] Wherein, based on the number of fork assemblies 13 in the present application and the number of timing forks in each group of fork assemblies 13, θ11 is approximately 78°, θ12 is approximately 55°, θ13 is approximately 30°, B=46°, α=23°, and A=0.92°.

[0077] It should be noted that, in actual use, each of the above-mentioned angles or fine-tuning values, and the size of the rotation angle can be changed according to the actual product design structure and requirements to meet usage requirements.

[0078] In this embodiment, the shift fork, blades 14, and blade rods 15 are all arranged in multiple groups, wherein the number of shift forks, blades 14, and blade rods 15 is the same, and the multiple groups of blade rods 15 are arranged at equal intervals along the circumference of the mounting plate 12; in actual application, the blade rods 15 can also be arranged at unequal intervals according to the working conditions.

[0079] In this embodiment, radial positioning pins 18 are provided for radial positioning and installation of the mounting plate 12 on the air compressor; travel limit pins are provided for limiting the rotation angle of the drive plate 11, thereby limiting the size of the opening of the nozzle ring 1, which meets the needs of the hydrogen fuel cell air compressor of a hydrogen energy vehicle or the fuel engine turbocharger of a fuel vehicle; a distance sleeve 16 and a rear cover plate 17 are provided, which together with the mounting plate 12 and the blades 14 form a fluid channel for the exhaust gas of the air compressor. In practical applications, the distance sleeve 16 and the rear cover plate 17 can also be omitted, and the corresponding parts of the air compressor or turbocharger, the mounting plate 12 and the blades 14 directly form the exhaust gas channel of the automobile.

[0080] It should be noted that the various embodiments of the present application can be arbitrarily combined into a new embodiment if the solutions do not conflict and the technical solutions can coexist.

[0081] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A variable cross-section nozzle ring with unequal angle timing fork, characterized in that: It comprises a blade (14), a shift fork assembly (13), a coaxially arranged drive disk (11) and a mounting disk (12), wherein the drive disk (11) is sleeved on the mounting disk (12), and the shift fork assembly (13) is connected to the blade (14); The driving disk (11) is provided with a shift fork groove (111); one end of the shift fork assembly (13) is rotatably connected to the mounting disk (12), and the other end is arranged in the shift fork groove (111); The shift fork assembly (13) comprises at least three timing shift forks, and the timing shift forks are arranged at intervals along the circumferential direction; A line connecting the blade (14) hole and the blade (14) end is used as a blade (14) reference line, a first angle is formed between a timing fork center line and the blade (14) reference line, and a second angle is formed between a radial line connecting the center of the mounting plate (12) and the blade (14) hole and the timing fork center line; The first included angle and the second included angle of each timing fork in each group of fork assemblies (13) are different in size; Wherein, when the unequal-angle timing fork variable-section nozzle ring (1) is in different gear openings, at least one timing fork in each group of fork assemblies (13) provides radial support force to the drive disc (11).

2. The unequal angle timing fork variable cross-section nozzle ring according to claim 1, characterized in that: The shift fork groove (111) opens on a side wall of the driving disk (11) facing the mounting disk (12), and the shift fork groove (111) comprises a middle restraining wall (1111); The timing fork comprises a middle supporting end (134); when the middle supporting end (134) is in contact with the middle restraining wall (1111), the timing fork is used to provide radial supporting force to the driving disc (11).

3. The unequal angle timing fork variable cross-section nozzle ring according to claim 2, characterized in that: The number of timing shift forks in each shift fork assembly (13) is n, and n≥3; When n is an odd number, the difference between the first angles of two adjacent timing forks from the middle opening timing fork toward the maximum opening timing fork is │B / (n-1)│; From the middle opening timing fork toward the minimum opening timing fork, the difference between the first angles of two adjacent timing forks is │B / (n-1)+Am│; The angle between the intermediate opening timing fork and the reference line of the blade (14) is β, Am is the correction compensation value of the angle between the mth fork and the blade (14) calculated from the maximum opening timing fork to the minimum opening timing fork, Am = β*(m+1) / 100; The center of the hole of the blade (14) is taken as the rotation point, and the travel angle of the timing fork from the minimum opening to the maximum opening is B.

4. The unequal angle timing fork variable cross-section nozzle ring according to claim 3, characterized in that: The shift fork assembly (13) comprises a first timing shift fork (131), a second timing shift fork (132) and a third timing shift fork (133) which are arranged in sequence along the same circumferential direction; When the middle support end (134) of the first timing fork (131) is in contact with the middle constraint wall (1111), the unequal angle timing fork variable cross-section nozzle ring (1) is in the minimum opening gear position; When the middle support end (134) of the second timing fork (132) is in contact with the middle constraint wall (1111), the unequal angle timing fork variable cross-section nozzle ring (1) is in a medium opening gear position; When the middle supporting end (134) of the third timing fork (133) is in contact with the middle restraining wall (1111), the unequal angle timing fork variable cross-section nozzle ring (1) is in a maximum opening gear position.

5. The variable cross-section nozzle ring of unequal angle timing fork according to claim 4, characterized in that: The first included angle of the first timing fork (131) is θ11; The first included angle of the second timing fork (132) is θ12; The first included angle of the third timing fork (133) is θ13; Wherein, when the unequal angle timing fork variable cross-section nozzle ring (1) is at different openings, θ11≠θ12≠θ13.

6. The unequal angle timing fork variable cross-section nozzle ring according to claim 5, characterized in that: The first included angle θ12 of the second timing fork (132) is β, wherein θ11 is β+α, θ13 is β-α-A, and A is 0.04β.

7. The unequal angle timing fork variable cross-section nozzle ring according to claim 2, characterized in that: The fork groove (111) further comprises a side end restraining wall (1112), and the side end restraining wall (1112) is arranged at two ends of the middle restraining arm; The middle restraining wall (1111) faces the center line direction of the mounting plate (12), and an angle θ4 is formed between the side restraining wall (1112) and the middle restraining wall (1111), and 60°<θ4<100°.

8. The unequal angle timing fork variable cross-section nozzle ring according to claim 7, characterized in that: The timing fork further comprises a side support end (135), wherein the side support end (135) is arranged at two ends of the middle support end (134), and an outer side wall of the side support end (135) is a smooth arc surface; Wherein, the side end restraining wall (1112) is used to fit with the side supporting end (135).

9. The unequal angle timing fork variable cross-section nozzle ring according to claim 1, characterized in that: The timing fork comprises a limiting portion (136) and a connecting portion (137), the limiting portion (136) being connected to the connecting portion (137), and the limiting portion (136) being located in the timing groove; The connecting portion (137) is rotatably connected to the mounting plate (12) via a blade rod (15), and the blade (14) hole is coaxially arranged with the blade rod (15).

10. The unequal angle timing fork variable cross-section nozzle ring according to claim 1, characterized in that: The fork assemblies (13) are at least three groups, and the fork assemblies (13) are arranged at intervals along the same circumferential direction; The mounting plate (12) is provided with a shaft shoulder (121), and the driving plate (11) is provided with an inner hole, wherein the diameter of the inner hole is larger than the outer diameter of the shaft shoulder (121).

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