Guide vanes and flow guiding components

Abstract

This application discloses a guide vane and a flow guiding assembly. The guide vane includes a first guide vane portion and a second guide vane portion, which are connected to the first guide vane portion along the rotation axis of the guide vane. The end of the second guide vane portion facing away from the first guide vane portion is defined as the blade root of the guide vane, which is used to connect with a first housing. At least a portion of the second guide vane portion protrudes from the first guide vane portion along a first direction, which is perpendicular to the rotation axis. By having at least a portion of the second guide vane portion protrude from the first guide vane portion along the first direction, this application expands the contact area between the blade root of the guide vane and the first housing, facilitating the sealing or reduction of the blade root gap, reducing sealing gaps, suppressing the flow velocity and kinetic energy of the leakage flow from the blade root, reducing flow separation and aerodynamic losses, and thus improving working efficiency.

Description

Technical Field

[0001] This application relates to the field of fluid machinery structure technology, and in particular to a guide vane and a flow guiding assembly. Background Technology

[0002] Some fluid machinery structures (such as compressors) are widely used in the HVAC industry. However, the adjustable guide vanes in existing fluid machinery structures have high flow losses, which reduces the working efficiency of the fluid machinery structures. Summary of the Invention

[0003] This application provides a guide vane and a flow guiding assembly to solve the technical problem that the adjustable guide vane in the existing fluid machinery structure has high flow loss and reduces the working efficiency of the fluid machinery structure.

[0004] To solve the above-mentioned technical problems, this application proposes a guide vane, which includes: a first guide vane portion; a second guide vane portion connected to the first guide vane portion along the rotation axis of the guide vane; the end of the second guide vane portion facing away from the first guide vane portion is defined as the root of the guide vane, and the root is used to connect with a first housing; wherein, at least a portion of the second guide vane portion protrudes from the first guide vane portion along a first direction, and the first direction is perpendicular to the rotation axis.

[0005] To solve the above-mentioned technical problems, this application proposes a flow guiding component, including: a first housing, the first housing having a main channel and a first inlet communicating with the main channel; and the aforementioned guide vane, the guide vane being connected to the first housing, the first guide vane portion of the guide vane being located inside the main channel and used to control the opening degree of the main channel.

[0006] This application's guide vane includes a first guide vane portion and a second guide vane portion. The second guide vane portion is connected to the first guide vane portion along the rotation axis of the guide vane. The end of the second guide vane portion facing away from the first guide vane portion is defined as the blade root of the guide vane. The blade root is used to connect with a first housing. At least a portion of the second guide vane portion protrudes from the first guide vane portion along a first direction. The first direction is perpendicular to the arrangement direction of the blade root and blade tip.

[0007] This application expands the contact range between the blade root and the first housing by having at least a portion of the second guide vane protrude from the first guide vane along the first direction, which facilitates sealing or reducing the blade root gap, reducing the sealing gap, suppressing the flow velocity and kinetic energy of the blade root leakage flow, reducing flow separation and aerodynamic losses, and thus improving working efficiency. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a first structural schematic diagram of an embodiment of the guide vane of this application; Figure 2 This is a second structural schematic diagram of an embodiment of the guide vane of this application; Figure 3 This is a schematic diagram of a first partial cross-section of the guide vane installed in the first housing of this application; Figure 4 This is a schematic diagram of a second partial cross-section of the guide vane installed in the first housing according to this application; Figure 5 This is a schematic diagram of a third partial cross-section of the guide vane installed in the first housing of this application; Figure 6 This is a schematic diagram of the leaf shape of this application; Figure 7 This is a partial structural schematic diagram of an embodiment of the flow guiding component of this application; Figure 8 yes Figure 7 An enlarged schematic diagram of A shown; Figure 9 This is a schematic diagram of the impeller structure in the flow guide assembly of this application; Figure 10 This is a schematic diagram of the leaf shape closing counterclockwise according to this application; Figure 11 yes Figure 10 The diagram shows the velocity triangles of the airfoil in different states.

[0009] Reference numerals: 10, guide vane; 11, blade shape; 111, leading edge; 112, trailing edge; 113, mid-arc line; 114, chord line; 115, pressure surface; 116, suction surface; 12, mounting part; 131, first guide vane part; 132, second guide vane part; 1321, annular arc surface; 13211, outer ring end; 13212, inner ring end; 100, flow guiding assembly; 20, first housing; 201, main flow channel; 202, first inlet; 203, first outlet; 204, mounting groove; 2041, preset spherical surface; 30, impeller; 301, second inlet; 40, clearance; 51, adjustable mechanism; 52, drive ring. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0011] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0012] The guide vane and guide vane assembly provided by the present invention will be described in detail below with reference to embodiments.

[0013] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 , Figure 1 This is a first structural schematic diagram of an embodiment of the guide vane of this application; Figure 2 This is a second structural schematic diagram of an embodiment of the guide vane of this application; Figure 3 This is a schematic diagram of a first partial cross-section of the guide vane installed in the first housing of this application; Figure 4 This is a schematic diagram of a second partial cross-section of the guide vane installed in the first housing according to this application; Figure 5 This is a partial cross-sectional view of the guide vane installed in the first housing according to this application. This application provides a guide vane. The guide vane 10 includes a first guide vane portion 131 and a second guide vane portion 132. The second guide vane portion 132 is connected to the first guide vane portion 131 along the rotational axis X1 of the guide vane 10. The end of the second guide vane portion 132 facing away from the first guide vane portion 131 is defined as the root of the guide vane 10. The root is used for connection with the first housing 20. At least a portion of the second guide vane portion 132 protrudes from the first guide vane portion 131 along a first direction. The first direction is perpendicular to the rotational axis X1.

[0014] The guide vane 10 is used for installation on a fluid machinery structure (not shown in the figure). The fluid machinery structure can be, but is not limited to, a pump (not shown in the figure), a fan (not shown in the figure), a compressor (axial or centrifugal compressor) (not shown in the figure), and a turbine (not shown in the figure). The guide vane 10 is used to adjust the airflow area within the fluid machinery structure.

[0015] The first guide vane portion 131 and the second guide vane portion 132 are detachably or fixedly connected. In this embodiment, the first guide vane portion 131 and the second guide vane portion 132 are integrally formed and connected. The end of the second guide vane portion 132 facing away from the first guide vane portion 131 is used to connect to the first housing 20. Alternatively, the end of the second guide vane portion 132 facing away from the first guide vane portion 131 may be rotatably connected to the first housing 20.

[0016] The blade root is located at the end of the second guide vane portion 132 opposite to the first guide vane portion 131. The rotation axis of the guide vane 10 is the axis of rotational symmetry of the guide vane 10. The guide vane 10 can rotate about its axis of rotational symmetry. Along the rotation axis X1 of the guide vane 10, part or all of the second guide vane portion 132 protrudes from the first guide vane portion 131 along a first direction. The first direction is perpendicular to the rotation axis X1. Figure 2 As shown, in this embodiment, when the rotation axis X1 of the guide vane 10 is vertical, the first direction is horizontal, and the vertical and horizontal directions are perpendicularly arranged. The aforementioned first guide vane portion 131 can be the main body of the guide vane 10. The first guide vane portion 131 is used to adjust the airflow area in the fluid machinery structure. The second guide vane portion 132 can be an auxiliary part of the guide vane 10.

[0017] Since at least a portion of the second guide vane 132 protrudes from the first guide vane 131 along the first direction, the contact range between the blade root of the guide vane 10 and the first housing 20 is expanded, which facilitates sealing or reducing the blade root gap, reducing the sealing gap, suppressing the flow velocity and kinetic energy of the blade root leakage flow, reducing flow separation and aerodynamic losses, and thus improving working efficiency.

[0018] In some embodiments, the end of the first guide vane portion 131 opposite to the second guide vane portion 132 is defined as the tip of the guide vane 10. The end face of the second guide vane portion 132 opposite to the first guide vane portion 131 is provided with an annular arc surface 1321. The annular arc surface 1321 is located in the outer peripheral region of the end face. The outer ring end 13211 of the annular arc surface 1321 is positioned closer to the tip of the guide vane than the inner ring end 13212 of the annular arc surface 1321.

[0019] The blade tip is located at the end of the first guide vane portion 131 that faces away from the second guide vane portion 132. The annular arc surface 1321 includes an outer ring end 13211 and an inner ring end 13212. The outer ring end 13211 is located at the outer end of the annular arc surface 1321. The inner ring end 13212 is located at the inner end of the annular arc surface 1321.

[0020] The outer ring end 13211 is closer to the blade tip than the inner ring end 13212, so that the outer side of the outer ring end 13211 bends and extends toward the first guide vane portion 131. This not only facilitates the second guide vane portion 132 to be fitted with the first housing 20, but also facilitates increasing the contact area within the same radial space (e.g., the horizontal space mentioned above).

[0021] In other embodiments, the end face of the second guide vane portion 132 opposite to the first guide vane portion 131 is provided with an arc-shaped surface (not shown in the figure). The outer end of the arc-shaped surface is closer to the blade tip than the inner end of the arc-shaped surface. When there are multiple arc-shaped surfaces, the multiple arc-shaped surfaces are distributed circumferentially along the rotation axis X1 and spliced ​​together to form an annular arc surface 1321; or, the multiple arc-shaped surfaces are spaced apart circumferentially along the rotation axis X1.

[0022] In some embodiments, the annular arc surface 1321 is located within a preset spherical surface 2041. When the guide vane 10 is assembled into the mounting groove 204 on the first housing 20, the preset spherical surface 2041 is the spherical surface where the inner wall of the mounting groove 204 is located, so that the annular arc surface 1321 is spaced apart from the inner wall of the mounting groove 204.

[0023] The first housing 20 can be a housing structure in a fluid machinery structure. The first housing 20 is used to accommodate and install the guide vane 10. The first housing 20 is provided with a mounting groove 204. The mounting groove 204 is used to accommodate the second guide vane portion 132. The inner wall of the mounting groove 204 is provided with a preset spherical surface 2041. The cross-sectional line of the preset spherical surface 2041 along the axial direction of the first housing 20 (the axial direction of the main flow channel 201) is an arc. The center of the preset spherical surface 2041 is located on the axis of the first housing 20.

[0024] The annular arc surface 1321 of the second guide vane 132 is located within the preset spherical surface 2041. At this time, the annular arc surface 1321 is spaced apart from the inner wall of the mounting groove 204 to facilitate the rotation of the guide vane 10 in the mounting groove 204. Part of the airflow enters the gap between the blade root and the inner wall of the mounting groove 204, and the annular arc surface 1321 blocks or reduces this gap.

[0025] The annular arc surface 1321 is close to the inner wall of the mounting groove 204, shortening the cross-sectional area of ​​the gap 40 between the blade root of the guide vane 10 and the inner sidewall of the first housing 20, thus reducing the fluid cross-sectional area of ​​the leakage gap. Furthermore, as the airflow flows from the annular arc surface 1321 along the interval, it weakens the velocity and kinetic energy of the leakage flow. The annular arc surface 1321 spans the pressure surface 115 and suction surface 116 of the first guide vane portion 131 along the airflow direction, i.e., the central axis X2 direction of the main flow channel 201. This balances the local pressure difference in the gap 40 on both sides of the pressure surface 115 and suction surface 116. The annular arc surface 1321 cuts and disperses the leakage vortex at the gap 40, preventing the formation of large-scale vortices and reducing secondary flow losses.

[0026] In some embodiments, the end face of the second guide vane portion 132 facing the first guide vane portion 131 is a plane perpendicular to the rotation axis X1.

[0027] The end face of the second guide vane 132 facing the first guide vane 131 is a plane. This plane is perpendicular to the rotation axis X1. The fact that the end face of the second guide vane 132 facing the first guide vane 131 is a plane can effectively block the transverse leakage airflow across the pressure difference at the root of the guide vane 10, thereby suppressing root leakage flow; it can reduce the risk of flow separation and local eddies, reduce aerodynamic losses; and it is easier to process and manufacture.

[0028] When the outer peripheral region of the end face of the second guide vane 132 is an annular arc surface 1321, and the end face of the second guide vane 132 facing the first guide vane 131 is a plane, the second guide vane 132 may be, but is not limited to, a frustum-shaped, a frustum-conical, or a spherical portion. When the outer peripheral region of the end face of the second guide vane 132 is an arc surface, and the end face of the second guide vane 132 facing the first guide vane 131 is a plane, the second guide vane 132 may be, but is not limited to, a fan-shaped block structure, etc.

[0029] In some embodiments, the guide vane 10 further includes a mounting portion 12. The mounting portion 12 is connected to the middle region of the end of the second guide vane portion 132 opposite to the first guide vane portion 131. The mounting portion 12 is movably connected to the first housing 20 so that the guide vane 10 rotates in a vertical plane of the rotation axis X1.

[0030] The mounting part 12 serves as the mounting structure for the guide vane 10. The guide vane 10 is movably connected to the first housing 20 via the mounting part 12. This movable connection can be, but is not limited to, a rotatable connection. The mounting part 12 is rotatably connected to the first housing 20. When the mounting part 12 rotates about the rotation axis X1, the first guide vane part 131 and the second guide vane part 132 also rotate about the plane perpendicular to the rotation axis X1.

[0031] The mounting portion 12 and the second guide vane portion 132 are detachably or fixedly connected in the middle region of the end opposite to the first guide vane portion 131. The second guide vane portion 132 is located between the mounting portion 12 and the first guide vane portion 131. In this embodiment, the mounting portion 12, the second guide vane portion 132, and the first guide vane portion 131 are integrally formed and connected.

[0032] By limiting the mounting part 12 for movable connection to the first housing 20, it can not only provide rotational axial X1 limiting support for the guide vane 10 and limit the positional offset of the guide vane 10, thereby making the annular arc surface 1321 and the inner wall of the mounting groove 204 spaced apart; but also the mounting part 12 constitutes the rotation point of the guide vane 10, satisfying the motion requirements for angle adjustment of the guide vane 10; at the same time, the aerodynamic load of the first guide vane part 131 and the second guide vane part 132 is transmitted to the first housing 20, which can reduce the stress concentration of the first guide vane part 131 and the second guide vane part 132.

[0033] Please see Figure 6 , Figure 6 This is a schematic diagram of the leaf shape of this application. Combined with... Figures 1 to 5 In some embodiments, the first guide vane portion 131 has a blade shape 11. The blade shape 11 is formed with a central arc line 113. The central arc line 113 is curved.

[0034] A reference cylindrical surface (not shown in the figure) is constructed around the rotation axis X1 of the guide vane 10. The cross-section obtained by cutting the guide vane 10 with the reference cylindrical surface is defined as the airfoil 11. The mid-arc line 113 is the line connecting the centers of all inscribed circles between the pressure surface 115 and the suction surface 116. The pressure surface 115 is the side of the guide vane 10 that moves relative to the airflow, i.e., the direction of the airflow facing the guide vane 10. The suction surface 116 is the other side of the guide vane 10 that moves relative to the airflow, i.e., the direction of the airflow away from the guide vane 10.

[0035] By limiting the curvature of the middle arc 113, the guide vane 10 is made curved, which can reduce flow loss and improve the angle of attack adaptability, thereby improving work efficiency.

[0036] In some embodiments, the blade 11 has a leading edge 111 and a trailing edge 112. A middle arc 113 forms a first intersection with the leading edge 111. A middle arc 113 forms a second intersection with the trailing edge 112. The tangent of the middle arc 113 at the first intersection intersects the tangent of the middle arc 113 at the second intersection.

[0037] The leading edge 111 is the part of the guide vane 10 that first contacts the airflow during its rotation. The leading edge 111 is located at one end of the blade shape 11. The shape of the leading edge 111 can be, but is not limited to, an arc shape or an ellipse. The trailing edge 112 refers to the part where the airflow finally exits from the guide vane 10. That is, the airflow enters from the leading edge 111 of the guide vane 10 and exits from the trailing edge 112. The trailing edge 112 is located at the other end of the blade shape 11. The shape of the trailing edge 112 can be, but is not limited to, a pointed, thin shape, a small rounded corner, or a wedge shape.

[0038] The middle arc 113 forms a first intersection point at the leading edge 111. The middle arc 113 forms a second intersection point at the trailing edge 112. The tangent of the middle arc 113 at the first intersection point and the tangent of the middle arc 113 at the second intersection point intersect, that is, there is an angle between the tangent of the middle arc 113 at the first intersection point and the tangent of the middle arc 113 at the second intersection point.

[0039] By limiting the intersection of the tangent of the middle arc line 113 at the first intersection point and the tangent of the middle arc line 113 at the second intersection point, the guide vane 10 is made curved, which can reduce flow loss and improve the angle of attack adaptability, thereby improving working efficiency.

[0040] In some embodiments, the tangents of the middle arc line 113 at the first intersection point and the tangents of the middle arc line 113 at the second intersection point intersect to form a blade angle. This blade angle α is greater than 0 degrees and less than 180 degrees, giving the guide vane 10 a bend, which reduces flow losses and improves angle-of-attack adaptability, thereby increasing working efficiency. The aforementioned blade angle α can be, but is not limited to, 1 degree, 5 degrees, 10 degrees, 15 degrees, 20 degrees, 26 degrees, 30 degrees, 35 degrees, 40 degrees, 70 degrees, 90 degrees, and 100 degrees, etc.

[0041] In one specific embodiment, the blade angle is greater than or equal to 5 degrees and less than or equal to 30 degrees.

[0042] The blade angle α can be, but is not limited to, 5 degrees, 7 degrees, 9 degrees, 10 degrees, 11 degrees, 15 degrees, 17 degrees, 20 degrees, 22 degrees, 25 degrees, 26 degrees, 28 degrees, and 30 degrees. In other embodiments, the blade angle α can be less than 5 degrees or greater than 30 degrees, etc., and is not limited here.

[0043] By limiting the blade angle to be greater than or equal to 5 degrees and less than or equal to 30 degrees, the curvature of the guide vane 10 is moderate, and the flow path transitions smoothly when the airflow passes through the guide vane 10, reducing the risk of boundary layer separation, thereby reducing flow loss and improving angle of attack adaptability, thus improving work efficiency.

[0044] In some embodiments, a chord 114 is formed between the leading edge 111 and the trailing edge 112. The chord 114 is located between the middle arc 113 and the pressure surface 115. Here, the chord line 114 is defined as a straight reference line connecting the leading edge 111 and the trailing edge 112. The mid-arc line 113 is the line connecting the centers of all inscribed circles between the pressure surface 115 and the suction surface 116. The pressure surface 115 is the direction of airflow facing the guide vane 10. The suction surface 116 is the direction of airflow away from the guide vane 10. When the chord line 114 is located between the mid-arc line 113 and the pressure surface 115, the blade profile 11 protrudes towards the suction surface 116.

[0045] By defining the chord 114 between the mid-arc line 113 and the pressure surface 115, the guide vane 10 is convex and curved toward the suction surface 116, thereby reducing airflow boundary layer separation, thus reducing flow loss and improving angle of attack adaptability.

[0046] In some embodiments, the line connecting the leading edge 111 and the trailing edge 112 is defined as a chord 114. The ratio of the diameter of the largest inscribed circle in the blade 11 to the length of the chord 114 is the relative thickness of the blade 11. The relative thickness is greater than or equal to 0.05 and less than or equal to 0.15.

[0047] The relative thickness of blade profile 11 refers to the ratio between the maximum inscribed diameter of the inscribed circle and the chord length. This relative thickness of blade profile 11 corresponds to its maximum thickness. For example... Figure 6 As shown, the inscribed diameter of the largest inscribed circle is defined as D, the chord length as Lc, and the relative thickness of the blade 11 is defined as D / Lc. 0.05 ≤ D / Lc ≤ 0.15. The relative thickness of the blade 11 can be, but is not limited to, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, and 0.15, etc.

[0048] During operation, the relative thickness of the blade 11 is controlled within the range of 0.05 to 0.15. When the airflow passes through the leading edge 111 and trailing edge 112 of the blade 11, the flow path transitions smoothly, reducing airflow boundary layer separation.

[0049] By limiting the relative thickness of the blade 11 to be greater than or equal to 0.05 and less than or equal to 0.15, airflow separation on the surface of the guide vane 10 can be reduced, thereby reducing flow loss and improving angle of attack adaptability, thus improving work efficiency.

[0050] In some embodiments, the first guide vane portion 131 is plate-shaped. Along the direction from the blade root to the blade tip, the cross-sectional area of ​​the first guide vane portion 131 gradually decreases along the rotation axis X1.

[0051] The blade has a thin and flat shape. The first guide vane portion 131 extends from the blade root to the blade tip. Along the blade root to the blade tip, the cross-sectional area of ​​the first guide vane portion 131 gradually decreases perpendicular to the rotation axis X1. The change in cross-sectional area can be achieved through arithmetic progressions or non-arithmetic progressions, which is not limited here.

[0052] The first guide vane 131, near the second guide vane 132, has a large cross-sectional area along the rotation axis X1, resulting in low airflow velocity and high pressure. Conversely, the first guide vane 131, away from the second guide vane 132, has a small cross-sectional area along the rotation axis X1, resulting in higher airflow velocity and lower pressure. By gradually decreasing the cross-sectional area of ​​the first guide vane 131 perpendicular to the rotation axis X1 along the blade root towards the blade tip, the pressure gradient along the rotation axis X1 caused by centrifugal force can be counteracted, secondary flow can be suppressed, and losses can be reduced; furthermore, tip leakage losses can be minimized.

[0053] Please see Figure 7 as well as Figure 8 , Figure 7 This is a partial structural schematic diagram of an embodiment of the flow guiding component of this application; Figure 8 yes Figure 7 An enlarged schematic diagram of A is shown below. (Combined with...) Figures 1 to 6This application provides a flow guiding assembly. The flow guiding assembly 100 includes a first housing 20 and a guide vane 10. The first housing 20 is provided with a main flow channel 201 and a first inlet 202 communicating with the main flow channel 201. The guide vane 10 is connected to the first housing 20. The first guide vane portion 131 of the guide vane 10 is located inside the main flow channel 201 and is used to control the opening degree of the main flow channel 201.

[0054] The flow guiding assembly 100 can be a fluid mechanical structure. The first housing 20 provides the mounting position and space for the guide vane 10. The first housing 20 is a hollow cylindrical shape. A main flow channel 201 is formed inside the first housing 20 for airflow. The main flow channel 201 extends along the axial direction of the first housing 20. One end of the first housing 20 has a first inlet 202. The first inlet 202 communicates with the main flow channel 201 to introduce airflow.

[0055] It should be noted that the guide vane 10 in this embodiment is the same as the guide vane 10 described in the above embodiments, and will not be repeated here. The mounting portion 12 of the guide vane 10 passes through and connects to the first housing 20. The first guide vane portion 131 of the guide vane 10 rotates within the main channel 201 and controls the opening size of the main channel 201.

[0056] By installing the aforementioned guide vanes 10, the flow guiding assembly 100 can not only control the opening of the main flow channel 201, but also expand the contact range between the blade root of the guide vane 10 and the first housing 20, seal the blade root gap, reduce the sealing gap, suppress the flow velocity and kinetic energy of the blade root leakage flow, reduce flow separation and aerodynamic losses, and thus improve working efficiency.

[0057] In some embodiments, the inner wall of the main channel 201 is provided with a mounting groove 204. A gap 40 is formed between the end face of the second guide vane portion 132 facing away from the first guide vane portion 131 and the inner wall of the mounting groove 204.

[0058] The mounting groove 204 is recessed relative to the inner wall of the main channel 201. The mounting groove 204 is used to accommodate at least a portion of the structure of the second guide vane 132. When the second guide vane 132 is at least partially located in the mounting groove 204, a gap 40 is formed between the end face of the second guide vane 132 facing away from the first guide vane 131 and the mounting groove 204.

[0059] When the airflow enters the main channel 201 from the first inlet 202, part of the airflow flows along the main channel 201 and passes through the first guide vane 131; another part of the airflow flows into the gap 40 along the main channel 201 and then flows out from the gap 40 back into the main channel 201.

[0060] When the guide vane 10 rotates, a gap 40 is formed between the second guide vane portion 132 and the mounting groove 204 of the first housing 20, which can reduce the leakage amount and leakage vortex intensity, reduce the total pressure loss, and improve working efficiency.

[0061] The aforementioned second guide vane 132 can extend the leakage flow path, balance local pressure differences, break up leakage vortices, and constrain the flow on the inner wall of the first housing 20, thereby reducing airflow loss and improving working efficiency. At the same time, the aforementioned gap 40 allows the second guide vane 132 to rotate freely, thereby reducing the risk of jamming.

[0062] In some embodiments, the flow guiding assembly 100 includes a plurality of guide vanes 10. A mounting groove 204 is disposed circumferentially around the inner wall of the main flow channel 201. The plurality of guide vanes 10 are arranged circumferentially along the main flow channel 201.

[0063] The first housing 20 provides mounting positions and space for multiple guide vanes 10. The number of guide vanes 10 may be, but is not limited to, two, three, or more than four. The mounting groove 204 is arranged around the inner wall of the main flow channel 201 circumferentially. The multiple guide vanes 10 may be evenly distributed circumferentially along the main flow channel 201; or, the multiple guide vanes 10 may be non-uniformly distributed circumferentially along the main flow channel 201, which is not limited here. As in this embodiment, the flow guiding assembly 100 includes eight guide vanes 10, which are evenly arranged circumferentially along the main flow channel 201.

[0064] When the guide vane 10 is installed in the first housing 20, the mounting portion 12 of the guide vane 10 passes through and connects to the first housing 20, and the root of the first guide vane portion 131 is connected to the second guide vane portion 132. The free end of the first guide vane portion 131 extends toward the axis of the main channel 201. When multiple guide vanes 10 are arranged circumferentially along the main channel 201, the first guide vane portions 131 of the multiple guide vanes 10 rotate within the main channel 201 and control the opening of the main channel 201.

[0065] By defining the mounting groove 204 and surrounding the inner wall of the main channel 201 in the circumference, multiple guide vanes 10 are arranged in the circumference of the main channel 201, which makes it easier to control the opening of the main channel 201.

[0066] In one specific embodiment, multiple guide vanes 10 can be driven by a drive mechanism (not shown in the figure). The drive mechanism includes an adjustable mechanism 51 and a drive ring 52. The drive ring 52 can be sleeved on the outer periphery of the first housing 20. The drive ring 52 is connected to the mounting portion 12 of the multiple guide vanes 10. The adjustable mechanism 51 drives the drive ring 52 to rotate around the circumference of the first housing 20. During the rotation of the drive ring 52 around the circumference of the first housing 20, the multiple guide vanes 10 rotate synchronously around their own rotation axis X1, thereby adjusting the angle of the first guide vane portion 131, thereby opening, closing, or adjusting the opening degree of the main channel 201. The adjustable mechanism 51 can be a hydraulic drive mechanism (not shown in the figure) or a hydraulic drive mechanism (not shown in the figure), etc., and is not limited here. The drive ring 52 and the guide vanes 10 can be connected by different swing arms (not shown in the figure).

[0067] In the open state, the tangent of the central arc 113 of the first guide vane 131 at the second intersection point can be parallel to the central axis X2 of the main channel 201, so that the area of ​​the first guide vane 131 blocking the main channel 201 is minimized. In the closed state, the tangent of the central arc 113 of the first guide vane 131 at the second intersection point can be perpendicular to the central axis X2 of the main channel 201, so that the area of ​​the first guide vane 131 blocking the main channel 201 is maximized.

[0068] In some embodiments, the inner wall surface of the mounting groove 204 is on a preset spherical surface 2041. The second guide vane portion 132 has an annular arc surface 1321 located within the preset spherical surface 2041 at one end face opposite to the first guide vane portion 131. The annular arc surface 1321 is located in the outer peripheral region of the end face. The outer ring end 13211 of the annular arc surface 1321 is positioned closer to the blade tip than the inner ring end 13212 of the annular arc surface 1321. The guide vane 10 is rotatably connected to the first housing 20. The rotation axis X1 of the guide vane 10 is parallel to the radial direction of the main flow channel 201. The end of the first guide vane portion 131 opposite to the second guide vane portion 132 is defined as the blade tip of the guide vane 10.

[0069] The preset spherical surface 2041 and the annular arc surface 1321 have been described in detail in the above embodiments and will not be repeated here.

[0070] The guide vane 10 rotates about the rotation axis X1. The rotation axis X1 of the guide vane 10 is parallel to and corresponds to the radial direction of the main channel 201. When multiple guide vanes 10 are arranged circumferentially along the main channel 201 of the first housing 20, the opening of the main channel 201 can be adjusted.

[0071] In some embodiments, the distance between the ends of the inner wall surface at both ends in the axial direction of the main channel 201 is a first dimension. The ratio of the second dimension of the second guide vane portion 132 in the axial direction of the main channel 201 to the first dimension is greater than or equal to 0.4 and less than 1.

[0072] In this context, along the axial direction of the main channel 201, the distance between the ends of the inner wall surface at both ends along the axial direction of the main channel 201 is defined as the first dimension L1. The second dimension of the second guide vane portion 132 along the axial direction of the main channel 201 is defined as L2. The ratio between L2 and L1 can be, but is not limited to, 0.4, 0.45, 0.5, 0.58, 0.6, 0.67, 0.7, 0.78, 0.8, 0.82, 0.9, 0.99, etc.

[0073] By limiting the ratio range between the second dimension and the first dimension, the dimension of the second guide vane 132 along the axial direction of the main channel 201 can be limited, avoiding local flow disturbances caused by the second dimension being too small, or additional flow losses caused by the second dimension being too large when entering the main channel 201, thereby improving the working efficiency of the flow guiding assembly 100.

[0074] In some embodiments, the vertical distance between one end of the inner wall surface in the axial direction of the main channel 201 and the central axis X2 of the main channel 201 is the first radial distance. The vertical distance between the other end of the inner wall surface in the axial direction of the main channel 201 and the central axis X2 is the second radial distance. The minimum vertical distance between the second guide vane portion 132 and the central axis X2 is the third radial distance. The third radial distance, the first radial distance, and the second radial distance satisfy: R3 ≥ (R1 + R2) / 2 * H. Wherein, R3 is the third radial distance, R1 is the first radial distance, R2 is the second radial distance, and H is greater than or equal to 0.85 and less than or equal to 0.95.

[0075] In this design, the central axis X2 of the main channel 201 is the central axis of the main channel 201. The vertical distance between one end of the inner wall surface along the axial direction of the main channel 201 and the central axis X2 is defined as the first radial distance R1. The vertical distance between the other end of the inner wall surface along the axial direction of the main channel 201 and the central axis X2 is defined as the second radial distance R2. The minimum vertical distance between the second guide vane 132 and the central axis X2 is defined as the third radial distance R3.

[0076] Where R3 ≥ (R1 + R2) / 2 * H. H is a preset constant. The preset constant H can be, but is not limited to, 0.85, 0.86, 0.87, 0.88, 0.89, 0.90, 0.91, 0.92, 0.93, and 0.95. In this embodiment, H is 0.9.

[0077] By limiting the relationship between the third radial distance, the second radial distance, and the first radial distance, not only is the size of the second guide vane 132 along the rotation axis X1 controlled within a reasonable range, preventing the second guide vane 132 from entering the main flow channel 201 and causing additional flow loss, thus further improving the working efficiency of the flow guiding assembly 100; but also a gap 40 is formed between the end face of the second guide vane 132 away from the first guide vane 131 and the inner wall of the mounting groove 204.

[0078] In some embodiments, the end face of the second guide vane 132 facing away from the first guide vane 131 matches the inner wall of the mounting groove 204, so that the gap 40 between the end face of the second guide vane 132 facing away from the first guide vane 131 and the inner wall of the mounting groove 204 is evenly distributed, so that the flow is uniform within the gap 40, thereby reducing aerodynamic losses, etc.

[0079] Please see Figure 9 , Figure 9 This is a schematic diagram of the impeller structure in the flow guide assembly of this application. (Combined with...) Figures 1 to 8 In some embodiments, the first housing 20 further includes a first outlet 203. The flow guiding assembly 100 also includes a second housing (not shown in the figure) and an impeller 30. Both the impeller 30 and the first housing 20 are disposed within the second housing. The impeller 30 is located at the first outlet 203. The impeller 30 has a second inlet 301. The first outlet 203 and the second inlet 301 communicate. The guide vane 10 rotates about the rotation axis X1 such that the guide vane 10 has at least a first state and at least a second state. The first guide vane portion 131 has a different blocking area on the second inlet 301 in the first state than in the second state, so as to control the opening of the main flow channel 201 by the rotation of the guide vane 10.

[0080] The first outlet 203 at the other end of the first housing 20 is used for airflow discharge. The first outlet 203 and the first inlet 202 are respectively provided. The first outlet 203 and the first inlet 202 are respectively provided at both ends of the first housing 20.

[0081] The second housing is the main structure of the flow guiding assembly 100. The second housing can be hollow cylindrical. The second housing provides an installation position and space for the impeller 30 and the first housing 20. The impeller 30 can be detachably or fixedly connected inside the second housing. The second inlet 301 of the impeller 30 and the first outlet 203 of the first housing 20 are connected. The airflow flows sequentially along the first inlet 202, the main flow channel 201, the first outlet 203, and the second inlet 301.

[0082] When the guide vane 10 rotates around the rotation axis X1, the guide vane 10 has a first state, a second state, a third state, and other states. In different states, the first guide vane portion 131 of the guide vane 10 blocks the second inlet 301 with different areas.

[0083] By limiting the area of ​​the first guide vane 131 that blocks the second inlet 301 in the first state to be different from the area that blocks the second inlet 301 in the second state, the opening of the main channel 201 can be adjusted by rotating the guide vane 10, thereby meeting the needs of different working conditions.

[0084] Please see Figure 10 and Figure 11 , Figure 10 This is a schematic diagram of the leaf shape closing counterclockwise according to this application; Figure 11 yes Figure 10 The diagram shows velocity triangles for different blade types in various states. (Combined with...) Figures 1 to 9 In some embodiments, during the process of the guide vane 10 changing from the open state to the closed state, the guide vane 10 rotates counterclockwise around the rotation axis X1 and sequentially has at least a first motion state and a second motion state, and the impeller 30 inlet angle of the impeller 30 gradually decreases.

[0085] During the process of the guide vane 10 rotating counterclockwise around the rotation axis X1 and gradually closing, the guide vane 10 changes sequentially from the open state, the first motion state, the second motion state, the third motion state, the fourth motion state, other motion states and then transitions to the closed state, so that the impeller 30 inlet angle gradually decreases.

[0086] For example, suppose guide vane 10 has a first motion state and a second motion state. For example... Figure 11 As shown, when the guide vane 10 is in the first motion state, W1 is the inlet velocity of the impeller 30. C1 is the absolute velocity of the guide vane 10. U1 is the circumferential velocity of the impeller 30. When the guide vane 10 is in the second motion state, W2 is the inlet velocity of the impeller 30. C2 is the absolute velocity of the guide vane 10. U2 is the circumferential velocity of the impeller 30. Since the rotational speed of the impeller 30 remains constant, U1 and U2 are the same at this time. There is a β1 between W1 and C1. There is a β2 between W2 and C1.

[0087] By limiting the guide vane 10 to rotate counterclockwise to the closed state, the velocity triangle shows that the impeller 30 inlet angle can be appropriately reduced, thereby reducing the flow loss in the closed state.

[0088] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of those features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. A process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0089] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A guide vane, characterized in that, The guide vane includes: First guide vane section; The second guide vane is connected to the first guide vane along the rotation axis of the guide vane; the end of the second guide vane away from the first guide vane is defined as the root of the guide vane, and the root is used to connect to the first housing. Wherein, at least a portion of the second guide vane protrudes from the first guide vane along a first direction, the first direction being perpendicular to the rotation axis.

2. The guide vane according to claim 1, characterized in that, The end of the first guide vane that is away from the second guide vane is defined as the tip of the guide vane; the end face of the second guide vane that is away from the first guide vane is provided with an annular arc surface, the annular arc surface is located in the outer peripheral region of the end face, and the outer ring end of the annular arc surface is positioned closer to the tip of the guide vane than the inner ring end of the annular arc surface.

3. The guide vane according to claim 2, characterized in that, The annular arc surface is located within a preset spherical surface. When the guide vane is assembled into the mounting groove on the first housing, the preset spherical surface is the spherical surface where the inner wall of the mounting groove is located, so that the annular arc surface is spaced apart from the inner wall of the mounting groove.

4. The guide vane according to claim 1, characterized in that, The end face of the second guide vane facing the first guide vane is a plane perpendicular to the rotation axis.

5. The guide vane according to claim 1, characterized in that, It also includes a mounting part, which is connected to the middle region of the end of the second guide vane part away from the first guide vane part, and the mounting part is used to be movably connected to the first housing so that the guide vane can rotate in the vertical plane of the rotation axis.

6. The guide vane according to claim 1, characterized in that, The first guide vane has a blade shape, the blade shape is formed with a central arc line, and the central arc line is curved.

7. The guide vane according to claim 6, characterized in that, The blade has a leading edge and a trailing edge. The middle arc line forms a first intersection point with the leading edge, and the middle arc line forms a second intersection point with the trailing edge. The tangent line of the middle arc line at the first intersection point intersects the tangent line of the middle arc line at the second intersection point.

8. The guide vane according to claim 7, characterized in that, The line connecting the leading edge and the trailing edge is defined as a chord; the ratio of the diameter of the largest inscribed circle in the blade shape to the length of the chord is the relative thickness of the blade shape, and the relative thickness is greater than or equal to 0.05 and less than or equal to 0.

15.

9. A flow guiding component, characterized in that, include: A first housing, the first housing having a main channel and a first inlet communicating with the main channel; The guide vane according to any one of claims 1 to 8, wherein the guide vane is connected to the first housing, and the first guide vane portion of the guide vane is located within the main channel for controlling the opening of the main channel.

10. The flow guiding component according to claim 9, characterized in that, The inner wall of the main channel is provided with an installation groove, and a gap is formed between the end face of the second guide vane portion away from the first guide vane portion and the inner wall of the installation groove.

11. The flow guiding component according to claim 10, characterized in that, The flow guiding assembly includes a plurality of guide vanes, and the mounting groove is circumferentially arranged around the inner wall of the main flow channel; the plurality of guide vanes are arranged circumferentially along the main flow channel.

12. The flow guiding component according to claim 10, characterized in that, The inner wall of the mounting groove is on a preset spherical surface, and the end face of the second guide vane away from the first guide vane is provided with an annular arc surface located within the preset spherical surface; the annular arc surface is located in the outer peripheral area of ​​the end face, and the outer ring end of the annular arc surface is positioned closer to the blade tip than the inner ring end of the annular arc surface; wherein, the end of the first guide vane away from the second guide vane is defined as the blade tip of the guide vane. The guide vane is rotatably connected to the first housing, and the rotation axis of the guide vane is parallel to the radial direction of the main channel.

13. The flow guiding component according to claim 12, characterized in that, The distance between the ends of the inner wall surface along the axial direction of the main channel is a first dimension; the ratio of the second dimension of the second guide vane along the axial direction of the main channel to the first dimension is greater than or equal to 0.4 and less than 1.

14. The flow guiding component according to claim 13, characterized in that, The vertical distance between one end of the inner wall surface in the axial direction of the main channel and the central axis of the main channel is the first radial distance. The vertical distance between the other end of the inner wall surface in the axial direction of the main channel and the central axis is the second radial distance. The minimum vertical distance between the second guide vane and the central axis is the third radial distance. The third radial distance, the first radial distance, and the second radial distance satisfy: R3 ≥ (R1 + R2) / 2 * H; where R3 is the third radial distance, R1 is the first radial distance, R2 is the second radial distance, and H is greater than or equal to 0.85 and less than or equal to 0.

95.

15. The flow guiding component according to claim 12, characterized in that, The first housing is also provided with a first outlet; the flow guiding assembly further includes a second housing and an impeller, the impeller and the first housing are both disposed in the second housing, the impeller is located at the first outlet, the impeller has a second inlet, and the first outlet and the second inlet are connected; The guide vane rotates about the rotation axis so that the guide vane has at least a first state and a second state; the first guide vane portion has a different blocking area on the second inlet in the first state than it does in the second state, so that the opening of the main channel can be controlled by the rotation of the guide vane.

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