Guide vane for EGR pipe

Abstract

The utility model discloses a kind of guide vanes for EGR pipe, it is related to automobile exhaust treatment technical field.The utility model includes mounting sleeve, the first installation ring is fixedly connected in mounting sleeve inside;The first installation ring one side is provided with limiting mechanism.The utility model is meshed with the tooth block of the inner ring of limiting ring and the tooth slot of installation disc outer ring, can effectively limit the axial displacement and unexpected rotation of installation disc under the action of airflow, avoid the unstable problem of guide flow caused by jumping or shaking of turbine blade, the air outlet channel being set between limiting ring and mounting sleeve, high-speed exhaust can be guided to flow to the working area of turbine blade, reduce airflow dispersion loss, the hollow structure of wind deflector and two side slope design, airflow entering mounting sleeve can be primarily rectified, reduce intake turbulence intensity, reduce airflow and pipe wall collision loss, further reduce pressure loss, improve guide efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of automotive exhaust gas treatment technology, and in particular relates to a guide vane for an EGR pipe. Background Technology

[0002] With increasingly stringent vehicle emission regulations, the EGR system, as one of the core technologies for reducing engine nitrogen oxide (NOx) emissions, has received much attention for performance optimization. The EGR pipe is a key channel connecting the engine exhaust manifold and intake manifold, and its internal airflow state directly affects the response speed of the EGR valve, the uniformity of recirculated exhaust gas, and the engine combustion efficiency.

[0003] Existing EGR pipe guide vanes typically employ a fixed turbine blade structure, which has the following drawbacks: First, the turbine blades are directly fixed to the inner wall of the EGR pipe, making them prone to axial runout under the impact of high-speed exhaust gas, leading to collision and wear between the blades and the pipe wall, thus shortening their service life; Second, the guide structure is simple, only achieving simple airflow deflection, and cannot effectively convert high-speed direct jets into uniform swirling flow, resulting in insufficient mixing of exhaust gas and fresh air, thus affecting EGR efficiency.

[0004] To address these issues, we provide a guide vane for EGR pipes. Utility Model Content

[0005] The purpose of this invention is to provide a guide vane for EGR pipes, which solves the problem of poor stability of guide vanes for EGR pipes in the prior art through the cooperation of a limiting mechanism and a guiding mechanism.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a guide vane for EGR pipes, comprising a mounting sleeve, wherein a first mounting ring is fixedly connected to the inner side of the mounting sleeve; a limiting mechanism is provided on one side of the first mounting ring, the limiting mechanism including a limiting ring on one side of the first mounting ring and a second mounting ring on the other side of the limiting ring; a guide mechanism is provided in the inner cavity of the mounting sleeve, the guide mechanism including a mounting plate disposed on the inner side of the mounting sleeve, a guide plate fixedly connected to one side of the mounting plate, and a turbine blade rotatably connected to one side of the mounting plate through a bearing seat.

[0008] The present invention is further configured such that threaded holes are provided on one side of the first mounting ring, the limiting ring, and the second mounting ring, and mounting bolts are threadedly connected to the inner cavity of the threaded holes. The first mounting ring, the first limiting ring, and the second mounting ring are detachably fixed through the threaded holes and the mounting bolts, which facilitates assembly and maintenance, and improves the stability and sealing of the structural connection.

[0009] The present invention is further configured such that an air outlet groove is provided between the limiting ring and the mounting sleeve, and the outer surface of the limiting ring is fixedly connected to the inner surface of the mounting sleeve. Through the air outlet groove formed between the first limiting ring and the second mounting ring, high-speed exhaust gas can flow into the guide mechanism area through the air outlet groove.

[0010] The present invention is further configured such that the inner ring of the limiting ring is provided with a toothed block, and the outer ring of the mounting plate is provided with a toothed groove adapted to the toothed block. Through the meshing of the toothed block and the toothed groove, the circumferential rotation of the mounting plate is restricted, preventing the turbine blades from rotating unexpectedly or moving axially under the action of airflow, thereby improving the working stability.

[0011] The present invention is further provided that a windshield ring is fixedly connected to the inner surface of the mounting sleeve. The windshield ring is a hollow structure design. The windshield ring can perform preliminary rectification of the airflow, reduce the intensity of the intake turbulence, and improve the subsequent guiding effect.

[0012] The present invention is further configured such that a first inclined surface is provided on the side of the wind deflector near the turbine blade, and a second inclined surface is provided on the side of the wind deflector away from the turbine blade. The inclined surface design helps to guide the airflow to transition smoothly, reduce flow resistance, further improve the flow guiding efficiency and reduce pressure loss.

[0013] The present invention is further configured such that mounting flanges are fixedly connected to both ends of the mounting sleeve, and the diameters of the first mounting ring and the second mounting ring are both smaller than the diameter of the mounting plate. The mounting flanges facilitate quick connection with the EGR pipeline, and the small diameter design of the first and second mounting rings ensures that they do not interfere with the airflow channel and guarantee unobstructed flow.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, through the meshing design of the toothed blocks of the inner ring of the limiting ring and the toothed grooves of the outer ring of the mounting plate, can effectively limit the axial displacement and unexpected rotation of the mounting plate under the action of airflow, avoid the problem of unstable airflow due to the jumping or shaking of the turbine blades, and improve the reliability of long-term operation. The air outlet groove set between the limiting ring and the mounting sleeve can guide the high-speed exhaust gas to flow to the working area of ​​the turbine blades, reducing the airflow dispersion loss. The hollow structure of the wind baffle and the design of the two inclined surfaces (the first inclined surface and the second inclined surface) can perform preliminary rectification of the airflow entering the mounting sleeve, reduce the intake turbulence intensity, reduce the collision loss between the airflow and the pipe wall, further reduce pressure loss, and improve the airflow guiding efficiency.

[0016] 2. The first mounting ring, the limiting ring, and the second mounting ring of this utility model are connected by threaded holes and mounting bolts in a detachable manner, which realizes the modular assembly of the flow guiding mechanism. During maintenance, only the bolts need to be removed to quickly separate the components and replace the turbine blades or the flow guide plate individually, which greatly reduces maintenance costs and time.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional view of a guide vane for an EGR pipe.

[0020] Figure 2 This is a right view of a guide vane for an EGR pipe.

[0021] Figure 3 This is a cross-sectional view of an installation sleeve in a guide vane for an EGR pipe.

[0022] Figure 4 This is an exploded view of the first mounting ring, the limiting ring, and the second mounting ring in an EGR pipe guide vane.

[0023] Figure 5 This is a diagram showing the assembly of the mounting plate, guide vane, and turbine blades in an EGR pipe guide vane.

[0024] In the attached diagram: 1. Mounting sleeve; 2. First mounting ring; 3. Limiting ring; 4. Second mounting ring; 5. Mounting disc; 6. Guide plate; 7. Turbine blade; 8. Threaded hole; 9. Mounting bolt; 10. Air outlet groove; 11. Tooth block; 12. Tooth groove; 13. Wind deflector ring; 14. First inclined surface; 15. Second inclined surface; 16. Mounting flange. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0026] Please see Figures 1-5This utility model is a guide vane for EGR pipes, including a mounting sleeve 1, with a first mounting ring 2 fixedly connected to the inner side of the mounting sleeve 1; a limiting mechanism is provided on one side of the first mounting ring 2, the limiting mechanism including a limiting ring 3 on one side of the first mounting ring 2 and a second mounting ring 4 on the other side of the limiting ring 3; a guide mechanism is provided in the inner cavity of the mounting sleeve 1, the guide mechanism including a mounting plate 5 on the inner side of the mounting sleeve 1, a guide plate 6 fixedly connected to one side of the mounting plate 5, and a turbine blade 7 rotatably connected to one side of the mounting plate 5 through a bearing seat.

[0027] Further details: The second mounting ring 4 is a detachable structure. When installing the turbine blade 7, the second mounting ring 4 needs to be separated from the inner cavity of the mounting sleeve 1. The mounting disc 5 is placed in the inner cavity of the mounting sleeve 1, so that the outer ring groove 12 of the mounting disc 5 engages with the tooth block 11 inside the limiting ring 3. This prevents the turbine blade 7 from rotating under the action of airflow and causing axial runout, which would cause the turbine blade 7 to shake. Then, the second mounting ring 4 is placed in the mounting sleeve 1, and the first mounting ring 2, the limiting ring 3 and the second mounting ring 4 are fixed by the mounting bolts 9. Then, the mounting flange is used to install the mounting sleeve 1 and the EGR pipe. This simplifies the disassembly and assembly process of the flow guide mechanism and facilitates quick replacement of the turbine blade 7 or the flow guide plate 6 during maintenance. Example

[0028] Please see Figures 1-5 Based on embodiment 1, threaded holes 8 are provided on one side of the first mounting ring 2, the limiting ring 3, and the second mounting ring 4. The inner cavity of the threaded hole 8 is threaded with a mounting bolt 9. An air outlet groove 10 is provided between the limiting ring 3 and the mounting sleeve 1. The outer surface of the limiting ring 3 is fixedly connected to the inner cavity surface of the mounting sleeve 1. A toothed block 11 is provided on the inner ring of the limiting ring 3. A toothed groove 12 that matches the toothed block 11 is provided on the outer ring of the mounting plate 5. A wind baffle ring 13 is fixedly connected to the inner cavity surface of the mounting sleeve 1. The wind baffle ring 13 is a hollow structure design. A first inclined surface 14 is provided on the side of the wind baffle ring 13 near the turbine blade 7, and a second inclined surface 15 is provided on the side of the wind baffle ring 13 away from the turbine blade 7. Mounting flanges are fixedly connected to both ends of the mounting sleeve 1. The diameters of the first mounting ring 2 and the second mounting ring 4 are both smaller than the diameter of the mounting plate 5.

[0029] Further details: The first mounting ring 2, the first limiting ring 3, and the second mounting ring 4 are detachably fixed through the threaded hole 8 and the mounting bolt 9, facilitating assembly and maintenance while improving the stability and sealing of the structural connection. An air outlet groove 10 is formed between the first limiting ring 3 and the second mounting ring 4, allowing high-speed exhaust gas to flow into the guide mechanism area. The meshing of the toothed block 11 and the toothed groove 12 restricts the circumferential rotation of the mounting plate 5, preventing the turbine blades 7 from rotating unexpectedly or moving axially under the action of airflow, thus improving operational stability. The wind baffle ring 13 can perform preliminary airflow rectification, reducing the intensity of intake turbulence and improving the subsequent guide effect. The inclined surface design helps guide the airflow to a smooth transition, reducing flow resistance, further improving guide efficiency and reducing pressure loss. The mounting flange facilitates quick connection with the EGR pipeline. The small diameter design of the first mounting ring 2 and the second mounting ring 4 ensures that they do not interfere with the airflow channel, guaranteeing unobstructed flow.

[0030] The working principle of this utility model is as follows: During operation, the high-speed exhaust gas discharged from the engine flows into the mounting sleeve 1 through the EGR pipe. The guide plate 6 adjusts the swirl direction, causing the exhaust gas to flow axially along the EGR pipe. The exhaust gas flows into the guide mechanism area through the air outlet groove 10 between the first limiting ring 3 and the second mounting ring 4. The exhaust gas impacts the turbine blades 7, causing them to rotate around the bearing seat. The rotating turbine blades 7 shear, disperse, and transform the high-speed direct jet into a uniform swirling flow, which finally enters the engine intake manifold to participate in recirculation. During this process, the cooperation between the tooth block 11 and the tooth groove 12 restricts the axial displacement of the mounting plate 5, preventing the turbine blades 7 from colliding with the pipe wall due to airflow pulsation, thus ensuring the long-term stable operation of the guide mechanism.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A guide vane for an EGR pipe, comprising a mounting sleeve (1), characterized in that: The first mounting ring (2) is fixedly connected to the inner side of the mounting sleeve (1); A limiting mechanism is provided on one side of the first mounting ring (2). The limiting mechanism includes a limiting ring (3) provided on one side of the first mounting ring (2) and a second mounting ring (4) provided on the other side of the limiting ring (3). The inner cavity of the mounting sleeve (1) is provided with a flow guiding mechanism, which includes a mounting plate (5) disposed inside the mounting sleeve (1), a flow guiding plate (6) fixedly connected to one side of the mounting plate (5), and a turbine blade (7) rotatably connected to one side of the mounting plate (5) through a bearing seat.

2. The guide vane for an EGR pipe according to claim 1, characterized in that: The first mounting ring (2), the limiting ring (3) and the second mounting ring (4) are all provided with threaded holes (8) on one side, and the inner cavity of the threaded hole (8) is threaded with a mounting bolt (9).

3. The guide vane for an EGR pipe according to claim 1, characterized in that: An air outlet groove (10) is provided between the limiting ring (3) and the mounting sleeve (1), and the outer surface of the limiting ring (3) is fixedly connected to the inner surface of the mounting sleeve (1).

4. The guide vane for an EGR pipe according to claim 1, characterized in that: The inner ring of the limiting ring (3) is provided with a toothed block (11), and the outer ring of the mounting plate (5) is provided with a toothed groove (12) that matches the toothed block (11).

5. A guide vane for an EGR pipe according to claim 1, characterized in that: The inner surface of the mounting sleeve (1) is fixedly connected to a windshield ring (13), which is a hollow structure design.

6. A guide vane for an EGR pipe according to claim 5, characterized in that: The wind deflector (13) has a first inclined surface (14) on the side close to the turbine blade (7), and a second inclined surface (15) on the side away from the turbine blade (7).

7. The guide vane for an EGR pipe according to claim 1, characterized in that: The mounting sleeve (1) is fixedly connected to mounting flanges at both ends, and the diameters of the first mounting ring (2) and the second mounting ring (4) are both smaller than the diameter of the mounting plate (5).

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