Spiral nozzle ring

Abstract

The invention relates to the technical field of nozzle rings, in particular to a spiral nozzle ring which comprises a rear cover, a mounting disc body, a stress assembly and a flow limiting assembly. The rear cover is fixedly arranged on the upper side of the mounting disc body; the stress assembly is movably arranged on the inner side of the rear cover and located on the upper side of the installation disc body. The flow limiting assembly comprises a flow limiting sleeve and a throttling ring. The flow limiting sleeve is movably connected with the stress assembly. The throttling ring is fixedly arranged on the mounting disc body; a through groove is formed in the throttling ring; the flow limiting sleeve is in threaded connection with the throttling ring so as to adjust the opening diameter of the through groove, and the production cost and the later maintenance cost of the nozzle ring can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of nozzle rings, and specifically to a spiral nozzle ring. Background Art

[0002] With the in-depth development of the automotive industry, the requirements for fuel consumption and emissions have received increasing attention from the business community. The advantages of turbochargers in terms of emissions and fuel consumption have gradually been recognized as the scope of use expands, and each vehicle manufacturer is developing its own turbocharged engine.

[0003] The most ideal matching between a turbocharger and an engine is as follows: when the engine is running at low speed, the cross-sectional area of the turbine flow passage of the turbocharger is reduced to increase the boost pressure, thereby improving the low-speed characteristics of the engine; when the engine is running at high speed, the cross-sectional area of the turbine flow passage is gradually increased and the boost pressure is reduced to prevent the turbocharger from overspeed and causing damage to the turbocharger.

[0004] In the prior art, VGT (Variable Geometry Turbocharger) is used, which can change the cross-sectional area of the flow passage between adjacent nozzle ring blades, thereby adjusting the flow capacity at the turbine end, improving the utilization efficiency of the gas, enhancing the low-speed torque and high-speed performance of the engine, and further improving the performance of the whole vehicle.

[0005] Chinese Patent with Publication No. CN209308754U discloses a variable cross-section nozzle ring, which includes a mounting plate, a dial plate, a fork, a rear cover and nozzle ring blades. The mounting plate and the rear cover are connected by a fixed-distance pin. The mounting plate is connected to the dial plate through rollers. One end of the fork is connected to the dial plate, and the other end is connected to a rotating shaft. The rotating shaft passes through the mounting plate and is connected to the nozzle ring blades. Finally, by changing the cross-sectional area of the flow passage between adjacent nozzle ring blades, the flow capacity at the turbine end is adjusted. However, for a nozzle ring with this structure, due to the large number of parts such as forks and blades, the probability of nozzle ring damage increases after frequent use and wear, and both the production cost and the later maintenance cost are relatively high. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a spiral nozzle ring, which can reduce the production cost and later maintenance cost of the nozzle ring.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spiral nozzle ring, comprising a rear cover, a mounting disk body, a force-bearing component and a flow-limiting component; the rear cover is fixedly arranged on the upper side of the mounting disk body; the force-bearing component is movably arranged on the inner side of the rear cover and is located on the upper side of the mounting disk body; the flow-limiting component comprises a flow-limiting sleeve and a throttling ring; the flow-limiting sleeve is movably connected to the force-bearing component; the throttling ring is fixedly arranged on the mounting disk body; a through groove is provided on the throttling ring; the flow-limiting sleeve is threadedly connected to the throttling ring to adjust the opening diameter of the through groove.

[0008] Preferably, the flow limiting sleeve is an annular structure; the outer wall of the throttling ring is threadedly connected to the inner wall of the flow limiting sleeve, and the height of the flow limiting sleeve is not less than the height of the throttling ring.

[0009] Preferably, an annular flow limiting groove is opened at the lower part of the flow limiting sleeve; the flow limiting sleeve cover is arranged on the throttling ring, and the size of the throttling ring is not larger than the size of the flow limiting groove; the inner wall of the flow limiting groove is threadedly connected to the throttling ring.

[0010] Preferably, there are a plurality of through grooves, and the plurality of through grooves are evenly distributed around the axis of the throttling ring.

[0011] Preferably, the limiting sleeve comprises a limiting sleeve body and a shift block; the shift block is arranged on the outside of the limiting sleeve body; the inner wall of the limiting sleeve body is threadedly connected to the outer wall of the throttling ring; the force-bearing component is movably connected to the limiting sleeve body through the shift block.

[0012] Preferably, the force-bearing component includes a toggle plate and a driving pin; the driving pin is arranged at the upper end of the toggle plate; a slide groove is opened at the lower end of the toggle plate; the toggle block is at least partially embedded in the slide groove and the toggle block is slidably connected to the toggle plate; the toggle plate is movably arranged on the inner side of the rear cover; the inner diameter of the toggle plate is larger than the outer diameter of the flow limiting sleeve body.

[0013] Preferably, the shift block is a strip-shaped structure; the length direction of the shift block is parallel to the axis of the limiting sleeve body.

[0014] Preferably, a limiting ring is provided on the inner side of the rear cover; the outer diameter of the toggle plate is smaller than the inner diameter of the rear cover body but larger than the inner diameter of the limiting ring; the lower end of the toggle plate is crimped with the upper end of the limiting ring.

[0015] Preferably, the lower end of the active pin is threadedly connected to the dial.

[0016] Preferably, the rear cover, the mounting plate body and the throttle ring are integrally formed.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: By movably arranging the toggle disk inside the rear cover and sleeving the current-limiting sleeve on the throttle ring of the mounting disk, the current-limiting sleeve is threadedly connected to the throttle ring. The throttle ring is composed of a plurality of throttle blocks. The toggle disk is slidably connected to the current-limiting sleeve through the sliding block of the current-limiting sleeve. By rotating the toggle disk, the current-limiting sleeve can be driven to move up and down on the throttle ring. In this way, the size of the gap between the throttle blocks can be enlarged or reduced to adjust the flow capacity of the vortex end. Compared with the traditional nozzle ring, the nozzle ring of the present invention has fewer parts, lower maintenance costs, and is easy to produce and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention; Figure 2 is a schematic partial cross-sectional structure diagram of the nozzle ring of the present invention; Figure 3 for the present invention Figure 2 schematic structural diagram at A; Figure 4 is a schematic assembly structure diagram of the mounting disk and the rear cover of the present invention; Figure 5 is a schematic structural diagram of the toggle disk of the present invention; Figure 6 is a schematic installation structure diagram of the throttle ring and the current-limiting sleeve of the present invention.

[0019] In the figure: 1 rear cover, 11 limit ring, 2 toggle disk, 21 chute, 3 current-limiting sleeve, 31 current-limiting sleeve body, 32 sliding block, 3101 current-limiting groove, 4 mounting disk, 41 mounting disk body, 42 throttle ring, 4201 through groove, 5 active pin, 6 spacing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further details the specific embodiments of the present invention with reference to the drawings, so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and do not limit the scope of the present invention.

[0021] Specific Embodiment 1: Please refer to Figures 1-6 a spiral nozzle ring, including: Rear cover 1, the body of the rear cover 1 is in a ring structure, and a limit ring 11 is provided at the lower part inside the rear cover 1. It can be understood that the inner diameter of the limit ring 11 is smaller than the inner diameter of the body of the rear cover 1; The dial 2 is also in a ring structure. The dial 2 is movably arranged inside the rear cover 1. Among them, the outer diameter of the dial 2 is smaller than the inner diameter of the main body of the rear cover 1 and larger than the inner diameter of the limiting ring 11. The lower end of the dial 2 is in press contact with the upper end of the limiting ring 11. And under the action of an external force, the dial 2 can rotate coaxially relative to the rear cover 1. Further, a chute 21 is opened along the axis at the lower end of the dial 2. The upper end of the chute 21 is closed. In addition, the chute 21 is located inside the main body of the dial 2. In this embodiment, there are two chutes 21, and the two chutes 21 are symmetrically distributed on both sides of the axis of the dial 2. The current-limiting sleeve 3 includes a current-limiting sleeve body 31 and two dial blocks 32. The current-limiting sleeve body 31 is in a ring structure. A ring-shaped current-limiting groove 3101 is opened at the lower part of the current-limiting sleeve body 31. An external thread is provided on the side wall of the current-limiting groove 3101 close to the axis of the current-limiting sleeve body 31, and an internal thread is provided on the side wall of the current-limiting groove 3101 far from the axis of the current-limiting sleeve body 31. The dial block 32 is in a strip structure. Further, the two dial blocks 32 are symmetrically arranged on the outer periphery of the current-limiting sleeve body 31, and the length directions of the two dial blocks 32 are parallel to the axis of the current-limiting sleeve body 31. In this embodiment, the two dial blocks 32 are arranged in one-to-one correspondence with the two chutes 21. Specifically, at least a part of the upper end of the dial block 32 is embedded in the chute 21. The dial block 32 is slidably connected to the dial 2, and the dial 2 is slidably connected to the current-limiting sleeve body 31 through the dial block 32. At the same time, under the action of an external force, rotating the dial 2 can drive the current-limiting sleeve 3 to rotate synchronously. The outer diameter of the current-limiting sleeve body 31 is smaller than the inner diameter of the dial 2. The mounting disc 4, please refer to Figure 4 As shown, the mounting disc 4 includes a mounting disc body 41 and a throttle ring 42. An air inlet passage is opened at the axis of the mounting disc body 41. The throttle ring 42 is in a ring structure. The throttle ring 42 is fixedly arranged at the upper end of the mounting disc body 41, and the air inlet passage is located inside the throttle ring 42. The mounting disc body 41 and the throttle ring 42 are coaxial. Further, an external thread is provided on the outer wall of the throttle ring 42, and an internal thread is provided on the inner wall of the throttle ring 42. In order to achieve the throttling effect, a plurality of through grooves 4201 are also opened on the throttle ring 42. The plurality of through grooves 4201 are evenly distributed around the axis of the throttle ring 42. The opening of the through grooves 4201 divides the throttle ring 42 into several throttle blocks. The size of the throttle ring 42 is adapted to the size of the current-limiting groove 3101. After assembly, the current-limiting sleeve 3 is sleeved on the throttle ring 42. The side wall of the current-limiting groove 3101 is threadedly connected to both the inner and outer walls of the throttle ring 42. In the initial state, the throttle ring 42 is completely immersed in the current-limiting sleeve 3. The lower end surface of the current-limiting sleeve 3 is in seamless contact with the upper end surface of the mounting disc body 41. By rotating the current-limiting sleeve 3, the current-limiting sleeve 3 is displaced up and down on the throttle ring 42 to adjust the opening degree of the through grooves 4201, thereby realizing the adjustment of the flow capacity at the vortex end. In other preferred embodiments, the mounting disc 4 may be an integrally formed structure, which can improve the structural rigidity of the nozzle ring; A driving pin 5, which is detachably arranged on the toggle disc 2. Specifically, the lower end of the driving pin 5 is threadedly connected to the toggle disc 2; A spacing block 6, the rear cover 1 is fixedly arranged on the upper side of the mounting disc 4 through the spacing block 6 so that there is a certain distance between the rear cover 1 and the mounting disc 4; To ensure structural stability, three spacing blocks 6 are provided, and the three spacing blocks 6 are evenly distributed around the axis of the mounting disc 4; The lower end surface of the rear cover 1 is flush with the upper end surface of the throttle ring 42; In other embodiments, the rear cover 1, the mounting disc 4, and the spacing block 6 may be an integrally formed structure, which can further reduce the number of parts of the nozzle ring; Furthermore, the rear cover 1, the toggle disc 2, the flow-limiting sleeve 3, and the mounting disc 4 are coaxial; Through this technical solution, by movably arranging the toggle disc inside the rear cover, sleeving the flow-limiting sleeve on the throttle ring of the mounting disc, the flow-limiting sleeve is threadedly connected to the throttle ring, the throttle ring is composed of multiple throttle blocks, the toggle disc is slidably connected to the flow-limiting sleeve through the sliding blocks of the flow-limiting sleeve, and by rotating the toggle disc, the flow-limiting sleeve can be driven to move up and down on the throttle ring, and in this way, the size of the gap between the throttle blocks is enlarged or reduced to achieve the adjustment of the flow capacity of the vortex end. Compared with the traditional nozzle ring, the nozzle ring of the present invention has fewer parts, lower maintenance costs, and is easy to produce and assemble.

[0022] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral nozzle ring, characterized in that: The invention comprises a rear cover (1), a mounting plate body (41), a force-bearing component and a current-limiting component; the rear cover (1) is fixedly arranged on the upper side of the mounting plate body (41); the force-bearing component is movably arranged on the inner side of the rear cover (1) and located on the upper side of the mounting plate body (41); the current-limiting component comprises a current-limiting sleeve (3) and a throttling ring (42); the current-limiting sleeve (3) is movably connected to the force-bearing component; the throttling ring (42) is fixedly arranged on the mounting plate body (41); a through groove is provided on the throttling ring (42); the current-limiting sleeve (3) is threadedly connected to the throttling ring (42) to adjust the opening diameter of the through groove.

2. The spiral nozzle ring according to claim 1, wherein: The flow limiting sleeve (3) is an annular structure; the outer wall of the throttling ring (42) is threadedly connected to the inner wall of the flow limiting sleeve (3); the height of the flow limiting sleeve (3) is not less than the height of the throttling ring (42).

3. The spiral nozzle ring according to claim 1, characterized in that: An annular flow limiting groove (3101) is provided at the lower part of the flow limiting sleeve (3); the flow limiting sleeve (3) is covered on a throttling ring (42); the size of the throttling ring (42) is not larger than the size of the flow limiting groove (3101); and the inner wall of the flow limiting groove (3101) is threadedly connected to the throttling ring (42).

4. The spiral nozzle ring according to claim 1, characterized in that: A plurality of through grooves are provided; the plurality of through grooves are evenly distributed around the axis of the throttling ring (42).

5. The spiral nozzle ring according to claim 1, characterized in that: The flow limiting sleeve (3) comprises a flow limiting sleeve body (31) and a shifting block (32); the shifting block (32) is arranged on the outside of the flow limiting sleeve body (31); the inner wall of the flow limiting sleeve body (31) is threadedly connected to the outer wall of the throttling ring (42); and the force bearing component is movably connected to the flow limiting sleeve body (31) via the shifting block (32).

6. The spiral nozzle ring according to claim 5, wherein: The force-bearing component comprises a toggle plate (2) and a driving pin (5); the driving pin (5) is arranged at the upper end of the toggle plate (2); a slide groove (21) is provided at the lower end of the toggle plate (2); the toggle block (32) is at least partially embedded in the slide groove (21) and the toggle block (32) is slidably connected to the toggle plate (2); the toggle plate (2) is movably arranged on the inner side of the rear cover (1); the inner diameter of the toggle plate (2) is larger than the outer diameter of the flow limiting sleeve body (31).

7. The spiral nozzle ring according to claim 5, wherein: The shift block (32) is a strip-shaped structure; the length direction of the shift block (32) is parallel to the axis of the flow limiting sleeve body (31).

8. The spiral nozzle ring according to claim 6, wherein: A limiting ring (11) is provided on the inner side of the rear cover (1); the outer diameter of the shifting plate (2) is smaller than the inner diameter of the rear cover (1) body but larger than the inner diameter of the limiting ring (11); the lower end of the shifting plate (2) is crimped to the upper end of the limiting ring (11).

9. The spiral nozzle ring according to claim 6, wherein: The lower end of the active pin (5) is threadedly connected to the dial (2).

10. The spiral nozzle ring according to claim 1, wherein: The rear cover (1), the mounting plate body (41) and the throttle ring (42) are integrally formed.

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