Variable-section nozzle ring for hydrogen energy vehicle

Abstract

The variable-section nozzle ring for the hydrogen energy vehicle comprises a mounting disc and a driving disc which are coaxially arranged, a roller assembly is arranged between the driving disc and the mounting disc, and the driving disc and the mounting disc are rotationally connected through the roller assembly; a wedge-shaped part is arranged at the end, close to the mounting disc, of the driving disc; the roller assembly comprises a roller and a fixing shaft, the fixing shaft is fixedly connected with the mounting disc, a mounting hole is formed in the roller, the fixing shaft is located in the mounting hole, and the central axis of the fixing shaft and the central axis of the mounting hole are located on the same straight line; a gap L is formed between the outer wall of the fixing shaft and the inner wall of the mounting hole, and L is larger than or equal to 0.1 mm. According to the device, the rolling wheels, the driving disc and the mounting disc do not need to be tightly attached, and it can also be guaranteed that the driving disc is rotationally connected with the mounting disc; the gap between the outer wall of the fixing shaft and the inner wall of the mounting hole is larger than 0.1 mm, when foreign matter falls between the fixing shaft and the rolling wheel, clamping stagnation of the rolling wheel cannot be caused, enough space is provided for the foreign matter to flow out, clamping stagnation is avoided, and the failure probability of the variable-section nozzle ring is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of nozzle rings, and in particular to a variable-section nozzle ring for hydrogen-powered vehicles. Background Art

[0002] The variable cross-section nozzle ring assembly currently used for exhaust gas turbocharging generally includes a rear cover, a mounting plate and a driving plate arranged in parallel in sequence. Among them, the rear cover, the mounting plate and the driving plate are mostly annular, and there is a set of spacing elements between the mounting plate and the rear cover to keep the mounting plate and the rear cover at a certain distance. A group of blades are arranged circumferentially between the mounting plate and the rear cover. A blade rod is provided on one side of the blade, and the blade rod is rotatably connected to the mounting plate. A shift fork arranged circumferentially is provided on the driving plate, and the shift fork is connected to the blade rod, so that when the driving plate rotates, the shift fork will drive the blade rod to rotate, further causing the blade to rotate a certain angle, and the size of the fluid channel between adjacent blades is changed, thereby realizing the regulation of the flow rate and pressure of the engine exhaust gas.

[0003] Since the blades need to be driven by the shift fork to rotate, the driving force of the shift fork comes from the rotation of the drive disk. In the prior art, the drive disk rotates around the mounting disk, and the drive disk and the mounting disk are directly connected or connected through rollers. Therefore, it is necessary to ensure that the rollers, the drive disk, and the mounting disk are relatively tightly fitted so that the drive disk can rotate relative to the mounting disk, that is, there is sliding friction or rolling friction with a small gap between the drive disk and the mounting disk. Therefore, the gap between the rollers and the drive disk and the mounting disk is small and relatively precise. Therefore, residues dropped during work or powder after wear and tear will cause the drive disk and the mounting disk to wear or even get stuck, which can easily lead to failure of the variable cross-section nozzle ring assembly. Some foreign matter will accumulate and precipitate between the drive disk and the mounting disk, which will cause jamming over time and reduce the service life.

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

[0005] In view of this, in order to address the technical problem that the gap between the driving disk and the mounting disk in the nozzle ring assembly in the above-mentioned prior art is small, so that fallen residues or powder after wear and tear, etc. fall into the gap and easily cause the driving disk and the mounting disk to get stuck, the present application provides a variable-section nozzle ring for hydrogen energy vehicles, which has a reasonably arranged roller structure. While ensuring that the driving disk and the mounting disk can rotate relative to each other, there is sufficient space in the roller structure for foreign matter to flow out to avoid jamming, thereby reducing the probability of failure of the variable-section nozzle ring for hydrogen energy vehicles.

[0006] The present application provides a variable cross-section nozzle ring for a hydrogen vehicle, comprising a coaxially arranged mounting plate and a driving plate, a roller assembly being arranged between the driving plate and the mounting plate, the driving plate and the mounting plate being rotatably connected via the roller assembly; a wedge-shaped portion is arranged at the end of the driving plate close to the mounting plate;

[0007] Wherein, the roller assembly comprises a roller and a fixed shaft, the fixed shaft is fixedly connected to the mounting plate, a mounting hole is provided on the roller, the fixed shaft is located in the mounting hole, and the fixed shaft and the central axis of the mounting hole are in the same straight line;

[0008] There is a gap L between the outer wall of the fixed shaft and the inner wall of the mounting hole, wherein L≥0.1 mm.

[0009] The present application provides a variable-section nozzle ring for a hydrogen-powered vehicle, which is provided with a roller assembly, and the roller assembly is used to enable a driving disc and a mounting disc to rotate relative to each other, wherein the roller assembly includes a fixed shaft and a roller, and the fixed shaft is fixedly connected to the mounting disc, and a mounting hole is provided on the roller for inserting the fixed shaft, thereby realizing the installation of the roller and the fixed shaft, and then the roller, the driving disc and the mounting disc do not need to be tightly fitted, and the rotational connection between the driving disc and the mounting disc can be ensured; and there is a gap between the outer wall of the fixed shaft and the inner wall of the mounting hole, and the gap is greater than 0.1 mm, while most foreign matter in a turbocharger is generally less than 0.1 mm, therefore, even if foreign matter falls between the fixed shaft and the roller, it will not cause the roller to get stuck, that is, there is enough space in the roller structure for foreign matter to flow out and avoid getting stuck, which greatly reduces the probability of failure of the variable-section nozzle ring for a hydrogen-powered vehicle. At the same time, a wedge-shaped portion is provided at the end of the driving disk close to the mounting disk. Under the action of fluid pressure, the wedge-shaped portion will obtain an axial buoyancy, thereby generating an axial gap between the driving disk and the mounting disk. Foreign matter accumulated between the driving disk and the mounting disk is discharged from this gap, preventing the precipitation of foreign matter, reducing the probability of failure of the variable-section nozzle ring for hydrogen vehicles, and extending its service life.

[0010] Preferably, the mounting plate is provided with a mounting groove, and the mounting groove is used for the roller;

[0011] The central axis of the mounting groove is in the same straight line as the central axis of the fixed shaft, wherein the diameter of the mounting groove is larger than the diameter of the roller.

[0012] Preferably, the roller comprises a first rotating part and a second rotating part, the first rotating part and the second rotating part are coaxially arranged, one side of the second rotating part is in contact with the mounting plate, and the other side is connected to the first rotating part;

[0013] Wherein, the diameter of the first rotating part is smaller than the diameter of the second rotating part.

[0014] Preferably, the driving disk comprises a first driving part and a second driving part, the first driving part and the second driving part are coaxially arranged, and the inner diameter of the first driving part is smaller than the inner diameter of the second driving part;

[0015] Wherein, at least a portion of the inner wall of the first driving part is opposite to the outer wall of the first rotating part, and at least a portion of the inner wall of the second driving part is opposite to the outer wall of the second rotating part.

[0016] Preferably, a gap between an inner wall of the first driving part and an outer wall of the first rotating part is L1, and a gap between an inner wall of the second driving part and an outer wall of the second rotating part is L2, wherein L2>L1.

[0017] Preferably, a radial side wall of the first driving part facing the mounting disk is at least partially opposite to a radial side wall of the second rotating part facing the first rotating part, and a gap is L3, wherein L3>0.

[0018] Preferably, the mounting plate is provided with a clearance ring groove, the clearance ring groove is located on a side of the mounting groove away from the central axis, and the clearance ring groove is recessed in a direction away from the driving plate;

[0019] Wherein, the side end of the second rotating part away from the center of the mounting plate at least partially protrudes out of the mounting groove and is located above the clearance ring groove;

[0020] A gap L4 is provided between the radial side wall of the second rotating portion facing the clearance ring groove and the clearance ring groove, wherein L4>0.

[0021] Preferably, the distance between the radial side wall of the second driving portion facing the clearance ring groove and the radial side wall of the clearance ring groove is L5, wherein L5 <L4。

[0022] Preferably, the gap L between the outer wall of the fixed shaft and the inner wall of the mounting hole is set in the range of 0.2mm-0.4mm.

[0023] Preferably, the fixed shaft and the mounting plate are an integral structure.

[0024] Preferably, the wedge-shaped portion includes a first surface and a second surface, the first surface faces the roller assembly, and the second surface faces the mounting plate;

[0025] There is an angle θ between the first surface and the second surface, 90°<θ<180°.

[0026] The variable cross-section nozzle ring for hydrogen energy vehicles of the present application has at least the following technical effects:

[0027] 1. By setting a fixed shaft and roller, the driving disc, roller and mounting disc can rotate without close contact. At the same time, the gap between the fixed shaft and the roller is greater than 0.1mm, which can provide enough space for foreign matter to flow out and reduce the probability of jamming;

[0028] 2. By providing the mounting groove, the connection area between the roller and the mounting plate is increased, so that the connection between the roller and the mounting plate is more stable, and the relative rotation between the driving plate and the mounting plate is more stable;

[0029] 3. By providing the first rotating part and the second rotating part, and cooperating with the first driving part and the second driving part, a first limiting connection is provided between the driving disk and the roller to ensure a more stable connection between the driving disk and the roller;

[0030] 4. By setting a clearance ring groove, the outer side of the roller can protrude from the driving disk, thereby increasing the rotation effect of the driving disk and the roller;

[0031] 5. By setting a wedge-shaped portion at the end of the driving disc, the wedge-shaped portion will obtain an axial buoyancy under the action of fluid pressure, thereby generating an axial gap between the driving disc and the mounting disc. Foreign matter accumulated between the driving disc and the mounting disc will be discharged from this gap, preventing the precipitation of foreign matter, reducing the probability of failure of the variable-section nozzle ring for hydrogen-powered vehicles, and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a side view of a variable cross-section nozzle ring for a hydrogen vehicle provided in an embodiment of the present application. Figure 1 ;

[0033] Figure 2 This is a side view of a variable cross-section nozzle ring for a hydrogen vehicle provided in an embodiment of the present application. Figure 2 ;

[0034] Figure 3 It is a schematic cross-sectional structure diagram of a variable cross-section nozzle ring for a hydrogen energy vehicle provided in one embodiment of the present application;

[0035] Figure 4 It is a partial structural schematic diagram of a mounting disk provided in an embodiment of the present application;

[0036] Figure 5 yes Figure 3 A magnified schematic diagram of local A.

[0037] Reference numerals: 1. Variable cross-section nozzle ring for hydrogen vehicle;

[0038] 11. Mounting plate; 12. Driving plate; 13. Roller assembly; 14. Blades; 15. Blade rod; 16. Fork;

[0039] 111, mounting groove; 112, clearance ring groove;

[0040] 121, first driving part; 122, second driving part; 123, wedge-shaped part; 1231, first surface; 1232, second surface;

[0041] 131, roller; 132, fixed shaft;

[0042] 1311. Mounting hole; 1312. First rotating part; 1313. Second rotating part. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The present application is further described in detail below in conjunction with the accompanying drawings. Figures 1 to 5 illustrate.

[0047] The present application provides a variable cross-section nozzle ring for a hydrogen-powered vehicle, which is applied to a turbocharger of a hydrogen-powered vehicle engine, such as Figures 1 to 3As shown, it includes a coaxially arranged mounting disk 11 and a driving disk 12, wherein the driving disk 12 is located at the outer edge of the mounting disk 11, a roller assembly 13 is arranged between the driving disk 12 and the mounting disk 11, and the driving disk 12 and the mounting disk 11 are rotatably connected through the roller assembly 13; the variable cross-section nozzle ring 1 for hydrogen energy vehicles also includes blades 14, a blade rod 15 and a fork 16, the blade rod 15 is arranged axially, the blade rod 15 passes through the mounting disk 11, and the blade rod 15 is rotatably connected to the mounting disk 11; one end of the blade rod 15 exceeds the surface of the mounting disk 11 and is fixedly connected to the fork 16, and the other end is fixedly connected to the blade 14, wherein the roller assembly 13 is provided between the driving disk 12 and the mounting disk 11, and the driving disk 12 is rotatably connected to the mounting disk 11. The assembly 13 is arranged on the same side of the fork 16; the end of the fork 16 away from the vane rod 15 is engaged with the driving disk 12, and a slot is provided on the driving disk 12, and the fork 16 is located in the slot; when the driving disk 12 rotates relative to the mounting disk 11, the roller assembly 13 rotates relative to the driving disk 12 and the mounting disk 11 at the same time, reducing the wear of the driving disk 12 and the rotating disk. At the same time, the driving disk 12 drives the fork 16 to rotate, and the fork 16 drives the vane 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 from the engine.

[0048] In this embodiment, the roller assembly 13, the fork 16, the blade 14, and the blade rod 15 are all arranged in multiple groups, wherein the number of the fork 16, the blade 14, and the blade rod 15 is the same, and the multiple groups of blade rods 15 are arranged at equal intervals along the circumference of the mounting plate 11; and the spacing between the multiple groups of roller assemblies 13 can be the same or different, and the roller assembly 13 is preferably arranged in three or five groups; Figure 1 As shown, in the present application, the roller assemblies 13 are preferably arranged in five groups, and the spacings between the five groups of roller assemblies 13 are different.

[0049] Specifically, the roller assembly 13 is further described; Figures 1 to 5 As shown, the roller assembly 13 includes a roller 131 and a fixed shaft 132. Figure 5 As shown, the fixed shaft 132 is fixedly connected to the mounting disk 11, a mounting hole 1311 is provided on the roller 131, the fixed shaft 132 is located in the mounting hole 1311, the axis of the fixed shaft 132 is arranged parallel to the axis of the driving disk 12, and the central axis of the fixed shaft 132 and the mounting hole 1311 are on the same straight line, that is, the roller 131 is rotatably connected to the fixed shaft 132 through the mounting hole 1311, so that the roller 131 can be rotatably connected to the mounting disk 11 through the connection with the fixed shaft 132, so that the roller 131, the driving disk 12 and the mounting disk 11 do not need to be tightly fitted, and the rotatable connection between the driving disk 12 and the mounting disk 11 can also be ensured; as shown in FIG. Figure 5As shown, there is a gap L between the outer wall of the fixed shaft 132 and the inner wall of the mounting hole 1311, wherein L≥0.1mm, i.e., the gap between the fixed shaft 132 and the mounting hole 1311 is greater than 0.1mm, while most foreign objects in the turbocharger are generally smaller than 0.1mm. Therefore, even if foreign objects fall between the fixed shaft 132 and the roller 131, the roller 131 will not be stuck, i.e., the roller 131 has enough space for foreign objects to flow out and avoid sticking, which greatly reduces the probability of failure of the variable cross-section nozzle ring 1 for hydrogen energy vehicles, effectively improves the reliability and adaptability of the variable cross-section nozzle ring 1 for hydrogen energy vehicles, and has good practicality.

[0050] Preferably, in this embodiment, the gap L between the outer wall of the fixed shaft 132 and the inner wall of the mounting hole 1311 is set in the range of 0.2mm-0.4mm, that is, 0.4mm≤L≤0.4mm, so that the roller assembly 13 has sufficient space for foreign matter to flow out; of course, L can be set to any one of 0.20mm, 0.25mm, 0.30mm, 0.35mm, and 0.40mm, and the size of L can be selected according to actual needs.

[0051] In this embodiment, the fixed shaft 132 can be a separate structure from the mounting disk 11, that is, the fixed shaft 132 and the mounting disk 11 are manufactured separately and fixedly connected later; or the fixed shaft 132 and the mounting disk 11 are an integral structure, that is, the fixed shaft 132 is directly manufactured when the mounting disk 11 is manufactured.

[0052] Meanwhile, in this embodiment, if Figure 3 , Figure 5 As shown, a wedge-shaped portion 123 is provided at the end of the driving disk 12 close to the mounting disk 11. Due to the structural characteristics of the wedge-shaped portion 123 itself, under the action of fluid pressure, the wedge-shaped portion 123 is subjected to a large buoyancy, thereby causing an axial gap between the driving disk 12 and the mounting disk 11. Foreign matter accumulated between the driving disk 12 and the mounting disk 11 is discharged from the gap, preventing foreign matter from being deposited between the driving disk 12 and the mounting disk 11, reducing the probability of failure of the variable cross-section nozzle ring 1 for hydrogen vehicles, and extending the service life.

[0053] Further, such as Figure 4 , Figure 5As shown, a mounting groove 111 is provided on the mounting disk 11, and the mounting groove 111 is recessed toward the side where the blade 14 is located. The mounting groove 111 is used for the roller 131, and the side wall of the mounting groove 111 forms an arc-shaped structure, wherein the central axis of the mounting groove 111 is in the same straight line as the central axis of the fixed shaft 132, and the diameter of the mounting groove 111 is larger than the diameter of the roller 131, which can reduce the collision between the roller 131 and the side wall of the mounting groove 111 and ensure the smoothness of the rotation of the roller 131 in the mounting groove 111; in addition, the mounting groove 111 can increase the connection area between the roller 131 and the mounting disk 11, so that the connection between the roller 131 and the mounting disk 11 is more stable, and the relative rotation between the driving disk 12 and the mounting disk 11 is more stable.

[0054] Furthermore, the roller 131 is further expanded; Figure 5 As shown, the roller 131 includes a first rotating part 1312 and a second rotating part 1313, both of which are disc structures, and the first rotating part 1312 and the second rotating part 1313 are coaxially arranged, one side of the second rotating part 1313 is in contact with the mounting disk 11, and the other side is connected to the first rotating part 1312, that is, the first rotating part 1312 is connected to the upper end of the second rotating part 1313; wherein, the diameter of the first rotating part 1312 is smaller than the diameter of the second rotating part 1313, so that the cross-section of the roller 131 is L-shaped, such a structure reduces the difficulty of manufacturing the roller 131 on the one hand, and reduces the difficulty of installing the roller 131 on the other hand.

[0055] Correspondingly, such as Figure 5 As shown, the driving disk 12 includes a first driving portion 121 and a second driving portion 122, the first driving portion 121 and the second driving portion 122 are coaxially arranged, the first driving portion 121 is connected to the upper end of the second driving portion 122, the inner diameter of the first driving portion 121 is smaller than the inner diameter of the second driving portion 122, wherein at least part of the inner wall of the first driving portion 121 is opposite to the outer wall of the first rotating portion 1312, and at least part of the inner wall of the second driving portion 122 is opposite to the outer wall of the second rotating portion 1313, that is, the L-shaped angle formed by the inner wall of the connecting portion between the first driving portion 121 and the second driving portion 122 and the L-shaped angle formed by the outer wall of the connecting portion between the first rotating portion 1312 and the second rotating portion 1313 are opposite, so that the connecting surface between the inner wall of the driving disk 12 and the outer wall of the roller 131 is not a single straight surface, but a tortuous connecting surface, which can increase the connection stability between the driving disk 12 and the roller 131 on the one hand, and reduce the probability of external foreign matter entering between the roller 131 and the driving disk 12 on the other hand.

[0056] In particular, in this embodiment, if Figure 5As shown, the inner wall of the first driving part 121 is opposite to the outer wall of the first rotating part 1312, and the lower wall of the first driving part 121 is opposite to the upper wall of the second rotating part 1313, so that the first driving part 121 limits the second rotating part 1313, which can effectively prevent the roller 131 from axially escaping from the surface of the driving disk 12, and can increase the connection stability between the driving disk 12 and the roller 131.

[0057] Further, such as Figure 5 As shown, the first driving portion 121 includes an axial side wall and a radial side wall, and the gap between the axial inner wall of the first driving portion 121 and the axial outer wall of the first rotating portion 1312 is L1, so that the roller 131 and the driving disk 12 can be connected to the roller 131; the gap between the axial inner wall of the second driving portion 122 and the axial outer wall of the second rotating portion 1313 is L2, wherein L2>L1, that is, the first driving portion 121 of the driving disk 12 can be effectively positioned with the first rotating portion 1312, while preventing the roller 131 from colliding with the second rotating portion 1313 and the second driving portion 122 after moving outward, thereby reducing the wear and working noise between the second driving portion 122 and the second rotating portion 1313, and effectively improving the service life of the variable cross-section nozzle ring 1 for hydrogen energy vehicles.

[0058] At the same time, if Figure 4 , Figure 5 As shown, the radial side wall of the first driving part 121 facing the mounting disk 11 is at least partially opposite to the radial side wall of the second rotating part 1313 facing the first rotating part 1312, that is, the inner lower end surface of the first driving part 121 is opposite to the outer upper end surface of the second rotating part 1313, and the gap is L3, wherein L3>0, which can reduce the friction between the inner radial surface of the first driving part 121 and the outer radial surface of the second rotating part 1313, thereby reducing wear.

[0059] Further, such as Figure 4 , Figure 5 As shown, the mounting plate 11 is provided with a clearance ring groove 112, which is an annular structure. The clearance ring groove 112 is located on the side of the mounting groove 111 away from the central axis, that is, the clearance ring groove 112 is located outside the mounting groove 111, and the clearance ring groove 112 is concave in the direction away from the driving plate 12, wherein, as shown Figure 5As shown, the end face of the relief ring groove 112 is lower than the end face of the mounting groove 111, and at least a part of the side end of the second rotating part 1313 away from the center of the mounting disk 11 protrudes out of the mounting groove 111 and is located above the relief ring groove 112. There is a gap L4 between the radial side wall of the second rotating part 1313 facing the relief ring groove 112 and the relief ring groove 112, that is, there is a spacing between the bottom of the second rotating part 1313 and the radial end face of the relief ring groove 112, so that the roller 131 does not contact the relief ring groove 112. Among them, L4>0, thereby reducing the contact area between the roller 131 and the mounting disk 11, effectively reducing the friction between the roller 131 and the mounting disk 11, and then reducing the working noise and wear;

[0060] At the same time, as Figure 5 shown, the spacing between the radial side wall of the second driving part 122 facing the relief ring groove 112 and the radial side wall of the relief ring groove 112 is L5, where L5<L4, that is, the lower end of the second driving part 122 extends beyond the bottom of the mounting groove 111, and at least part of it is located in the relief groove and does not contact the groove surface of the relief ring groove 112. On the one hand, it can wrap the outside of the roller 131, reducing the probability of foreign objects entering between the roller 131 and the driving disk 12. On the other hand, it can reduce the collision between the driving disk 12 and the mounting disk 11 in the axial direction, reduce wear, which is beneficial to improving the service life and working stability of the variable cross-section nozzle ring 1 for hydrogen energy vehicles, and reduce working noise.

[0061] Furthermore, as Figure 5 shown, the wedge part 123 is arranged inside the second driving part 122. The wedge part 123 includes a first surface 1231 and a second surface 1232. The first surface 1231 is connected to the second surface 1232. The first surface 1231 faces the direction of the roller assembly 13, and the first surface 1231 is arranged axially. The second surface 1232 faces the direction of the mounting disk 11, and the second surface 1232 is inclined to the axial direction; among them, there is an included angle θ between the first surface 1231 and the second surface 1232, 90°<θ<180°, that is, the included angle between the first surface 1231 and the second surface 1232 is an obtuse angle, thus avoiding a 90-degree corner inside the second driving part 122, reducing the resistance of foreign object discharge, and increasing the space between the inside of the second driving part 122 and the mounting disk 11. When there are foreign objects between the driving disk 12 and the mounting disk 11, they can be discharged more smoothly in the direction of the wedge part 123; at the same time, the second surface 1232 is inclined to the axial direction, which has a guiding effect on the discharge of foreign objects outside the driving disk 12 and the mounting disk 11, and can increase the smoothness of foreign object discharge.

[0062] Preferably, θ can be set to any one of the angles 100°, 105°, 110°, 115°, 120°. Such an angle setting makes the wedge part 123 have a better foreign object guiding and discharging effect.

[0063] Further, such as Figure 5 As shown, the connecting surface between the first surface 1231 and the second surface 1232 is a smooth arched surface to avoid the formation of sharp corners, which can reduce the resistance to the discharge of foreign matter and has a better guiding effect, making the discharge of foreign matter between the driving disk 12 and the mounting disk 11 smoother, and the probability of blockage between the driving disk 12 and the mounting disk 11 is further reduced.

[0064] 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.

[0065] 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 for a hydrogen vehicle, characterized in that: The invention comprises a coaxially arranged mounting disk (11) and a driving disk (12), wherein a roller assembly (13) is arranged between the driving disk (12) and the mounting disk (11), and the driving disk (12) and the mounting disk (11) are rotatably connected via the roller assembly (13); and a wedge-shaped portion (123) is arranged at an end of the driving disk (12) close to the mounting disk (11); The roller assembly (13) comprises a roller (131) and a fixed shaft (132); the fixed shaft (132) is fixedly connected to the mounting plate (11); a mounting hole (1311) is provided on the roller (131); the fixed shaft (132) is located in the mounting hole (1311); and the central axis of the fixed shaft (132) and the mounting hole (1311) are on the same straight line; There is a gap L between the outer wall of the fixed shaft (132) and the inner wall of the mounting hole (1311), wherein L≥0.1 mm.

2. The variable cross-section nozzle ring for hydrogen vehicles according to claim 1 is characterized in that: The mounting plate (11) is provided with a mounting groove (111), and the mounting groove (111) is used for the roller (131); The central axis of the installation groove (111) and the central axis of the fixed shaft (132) are on the same straight line, wherein the diameter of the installation groove (111) is greater than the diameter of the roller (131).

3. The variable cross-section nozzle ring for hydrogen energy vehicles according to claim 2 is characterized in that: The roller (131) comprises a first rotating part (1312) and a second rotating part (1313), the first rotating part (1312) and the second rotating part (1313) are coaxially arranged, one side of the second rotating part (1313) is in contact with the mounting plate (11), and the other side is connected to the first rotating part (1312); Wherein, the diameter of the first rotating part (1312) is smaller than the diameter of the second rotating part (1313).

4. The variable cross-section nozzle ring for hydrogen vehicles according to claim 3 is characterized in that: The driving disk (12) comprises a first driving portion (121) and a second driving portion (122), the first driving portion (121) and the second driving portion (122) are coaxially arranged, and the inner diameter of the first driving portion (121) is smaller than the inner diameter of the second driving portion (122); Wherein, at least a portion of the inner wall of the first driving part (121) is opposite to the outer wall of the first rotating part (1312), and at least a portion of the inner wall of the second driving part (122) is opposite to the outer wall of the second rotating part (1313).

5. The variable cross-section nozzle ring for hydrogen vehicles according to claim 4, characterized in that: The gap between the inner wall of the first driving part (121) and the outer wall of the first rotating part (1312) is L1, and the gap between the inner wall of the second driving part (122) and the outer wall of the second rotating part (1313) is L2, wherein L2>L1.

6. The variable cross-section nozzle ring for hydrogen vehicles according to claim 4, characterized in that: The radial side wall of the first driving part (121) facing the mounting plate (11) is at least partially opposite to the radial side wall of the second rotating part (1313) facing the first rotating part (1312), and the gap is L3, wherein L3>0.

7. The variable cross-section nozzle ring for hydrogen-powered vehicles according to claim 4, characterized in that: The mounting plate (11) is provided with a clearance ring groove (112), the clearance ring groove (112) is located on a side of the mounting groove (111) away from the central axis, and the clearance ring groove (112) is recessed in a direction away from the driving plate (12); Wherein, the side end of the second rotating portion (1313) away from the center of the mounting plate (11) at least partially protrudes from the mounting groove (111) and is located above the clearance ring groove (112); A gap L4 is provided between the radial side wall of the second rotating portion (1313) facing the clearance ring groove (112) and the clearance ring groove (112), wherein L4>0.

8. The variable cross-section nozzle ring for hydrogen vehicles according to claim 7, characterized in that: The distance between the radial side wall of the second driving portion (122) facing the clearance ring groove (112) and the radial side wall of the clearance ring groove (112) is L5, wherein L5 <L4。 9. The variable cross-section nozzle ring for hydrogen-powered vehicles according to claim 1, characterized in that: The gap L between the outer wall of the fixed shaft (132) and the inner wall of the mounting hole (1311) is set in the range of 0.2 mm to 0.4 mm.

10. The variable cross-section nozzle ring for hydrogen-powered vehicles according to claim 1, characterized in that: The fixed shaft (132) and the mounting plate (11) are an integral structure.

11. The variable cross-section nozzle ring for hydrogen vehicles according to claim 1, characterized in that: The wedge-shaped portion (123) comprises a first surface (1231) and a second surface (1232), wherein the first surface (1231) faces the roller assembly (13), and the second surface (1232) faces the mounting plate (11); There is an included angle θ between the first surface (1231) and the second surface (1232), 90°<θ<180°.

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