A high-efficiency guide vane structure and a fan provided with the guide vane structure

Abstract

The application discloses a high-efficiency guide vane structure and a fan provided with the guide vane structure. Distances between two adjacent ring guide vanes are different along a radial direction and are gradually increased. First and second auxiliary guide vanes are arranged on an outlet surface of a radial arc guide vane and cross two sides of a single ring guide vane. The circumferential and radial complementation improves the direction of the inlet airflow and has a significant efficiency improvement effect. The rear guide vane structure comprises an axially arranged first guide vane body and a second guide vane body. The first guide vane blade and the second guide vane blade are not overlapped in the axial projection, so that the airflow more smoothly enters the subsequent pipeline, the airflow turbulence degree is reduced, the pressure loss is reduced, and thus the fan flow stability and uniformity can be ensured, and the fan efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid machinery, in particular to a guide vane structure, and more particularly to a fan equipped with the guide vane structure. BACKGROUND

[0002] Fan guide vanes are important components in fans, usually installed at the inlet or outlet of fan impellers. Structurally, they are usually composed of multiple blades; functionally, inlet guide vanes are mainly used to adjust the direction and flow path of airflow entering the impeller, so that the airflow can enter the impeller at an appropriate angle, reducing impact loss and improving fan efficiency, while outlet guide vanes are mainly used to adjust the direction of airflow leaving the impeller, so that the airflow can more smoothly enter the subsequent pipeline, reducing airflow turbulence and pressure loss.

[0003] The prior art CN214330992U discloses a rear guide vane and an axial flow fan using the same, comprising a plurality of circumferentially arranged blades 11, a blade disc 13 is arranged at the blade root of the blade 11, and two adjacent blades 11 are spliced to form a rear guide vane 1 through the blade disc 13; a dovetail protrusion 16 is arranged on one side of the blade disc 13 in the circumferential direction, a dovetail groove 17 matching the dovetail protrusion 16 is arranged on the other side of the blade disc 13 in the circumferential direction, and the dovetail protrusion 16 of one of the two adjacent blades 11 is inserted into the dovetail groove 17 of the other blade 11; the length direction of the dovetail protrusion 16 is parallel to the axis direction of the rear guide vane 1, the length of the dovetail protrusion 16 is L, the distance of the blade disc 13 along the axis direction of the rear guide vane 1 is the axial width B, and 0.2B≤L≤B. The plurality of blades are spliced to form a rear guide vane through the adjacent blade discs, which has simple structure, convenient assembly, and low production cost. After the axial flow fan uses the rear guide vane, the rear guide vane and the protective net are connected through a sleeve ring, which is convenient to disassemble and assemble, and the sleeve ring can be formed by stamping, which has high production efficiency.

[0004] However, the above structure has design limitations, and has little effect on improving the flow state at the inlet and outlet in the actual application of the fan, resulting in large pressure loss and low efficiency of the fan after operation. Therefore, in view of these problems, the present applicant proposes a high-efficiency guide vane structure and a fan equipped with the guide vane structure. SUMMARY

[0005] The purpose of the present application is to solve the problems existing in the prior art and provide a high-efficiency guide vane structure and a fan equipped with the guide vane structure.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The application discloses a high-efficiency guide vane structure, which comprises a front guide vane structure and a rear guide vane structure, wherein the front guide vane structure adopts a grid structure, and the rear guide vane structure adopts a blade structure; the front guide vane structure comprises a plurality of circle ring guide vanes and a plurality of radial arc guide vanes; the circle ring guide vanes are different in radius and are arranged in a circle ring mode, the distance between two adjacent circle ring guide vanes in the radial direction is different and increases gradually, and the circle ring guide vanes are plate-shaped structures; the radial arc guide vanes are arranged in a radial mode along the circle ring guide vanes, intersect the circle ring guide vanes, are fan-shaped blocks and are arranged in a central symmetry mode along the center of the front guide vane structure, and the radial arc guide vanes are bent and twisted structures, and the radial arc line of the part, which is far away from the center of the front guide vane structure, is a part of an Archimedes spiral.

[0008] Further, the rear guide vane structure comprises a first guide vane body and a second guide vane body which are arranged in an axial sequence, the first guide vane body comprises a plurality of first guide vanes which are uniformly distributed in a circumferential direction, the second guide vane body comprises a plurality of second guide vanes which are uniformly distributed in the circumferential direction, the first guide vanes and the second guide vanes are not overlapped in an axial projection, the outer diameter of the first guide vane body is R1, and the outer diameter of the second guide vane body is R2, wherein R1>R2.

[0009] Further, the flow-through middle section of the first guide vane body forms an angle A with the central axis, and the flow-through middle section of the second guide vane body forms an angle B with the central axis, wherein A

[0010] Further, the first guide vane body and the second guide vane body are arranged in an axial "8" shape.

[0011] Further, the first guide vanes are bent and twisted vanes, and the second guide vanes are straight plate vanes.

[0012] Further, the rotation directions of the first guide vanes and the second guide vanes are opposite.

[0013] Further, the distance S between two adjacent circle ring guide vanes is arranged in an arithmetic sequence in the radial direction.

[0014] Further, at the position where the circle ring guide vane intersects the radial arc guide vane, the outlet surface of the radial arc guide vane is provided with a first auxiliary guide vane and a second auxiliary guide vane which span the two sides of a single circle ring guide vane, and the first auxiliary guide vane and the second auxiliary guide vane are of the same structure.

[0015] Further, the first auxiliary guide vane tail edge, the second auxiliary guide vane tail edge and the radial arc guide vane between the first auxiliary guide vane and the second auxiliary guide vane form an equilateral triangle-shaped flow regulation structure.

[0016] The fan with a guide vane structure comprises a guide cylinder, an impeller, a motor, a support part, a bearing and a shaft, the motor is installed in the support part through the shaft and the bearing, the impeller is fixed to the other end of the shaft, and the impeller and the support part are located in the guide cylinder, wherein the guide vane structure adopts a high-efficiency guide vane structure.

[0017] Further, the front guide vane structure is fixedly installed at the inlet end of the guide cylinder.

[0018] Further, the rear guide vane structure is fixedly installed on the support part in sequence, and the support part has a circular truncated cone structure in the flow direction.

[0019] Compared with the prior art, the fan has the following advantages:

[0020] 1. For the inlet, the distance between two adjacent circumferential ring guide vanes is not equal in the radial direction and is gradually increased, the circumferential ring guide vane has a plate structure, the radial arc guide vanes are arranged radially along the circumferential ring guide vanes in a radial direction and intersect the circumferential ring guide vanes, and the radial arc guide vanes have a fan-shaped block structure and are centrally symmetrically distributed along the center of the front guide vane structure, the radial arc guide vanes have a bent and twisted structure, and the radial arc line of the part away from the center of the front guide vane structure is a part of an Archimedes spiral. At the position where the circumferential ring guide vane and the radial arc guide vane intersect, the outlet surface of the radial arc guide vane is provided with a first auxiliary guide vane and a second auxiliary guide vane which span the two sides of a single circumferential ring guide vane; the circumferential and radial directions complement each other to improve the direction of the inlet airflow; in particular, the first auxiliary guide vane tail edge, the second auxiliary guide vane tail edge, and the radial arc guide vanes between the first auxiliary guide vane and the second auxiliary guide vane form a flow regulation structure body in the shape of an approximate equilateral triangle, which further improves the efficiency.

[0021] 2. For the outlet, the rear guide vane structure comprises a first guide vane body and a second guide vane body which are arranged in sequence in the axial direction, the first guide vane body comprises a plurality of first guide vanes which are uniformly distributed in the circumferential direction, the second guide vane body comprises a plurality of second guide vanes which are uniformly distributed in the circumferential direction, the first guide vanes and the second guide vanes do not overlap in the axial projection; the outer diameter of the first guide vane body is R1, the outer diameter of the second guide vane body is R2, wherein R1>R2, the flow cross section of the first guide vane body has an angle A with the central axis, the flow cross section of the second guide vane body has an angle B with the central axis, wherein A BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the inlet guide flow structure in the prior art;

[0023] Figure 2 It is a schematic diagram of the fan structure of the present application;

[0024] Figure 3 These are cross-sectional and front views of the front guide vane structure of the present invention;

[0025] Figure 4 for Figure 3 A partially enlarged view of the structure of the front guide vane;

[0026] Figure 5 This is a schematic diagram of the axial projection of the rear-mounted guide vane structure.

[0027] Figure 6 This is a schematic diagram showing the positional relationship of the rear guide vane structure.

[0028] In the diagram: front guide vane structure 1, rear guide vane structure 2, peripheral guide vane 11, radial arc guide vane 12, first guide vane body 21, second guide vane body 22, first guide vane blade 211, second guide vane blade 222, first auxiliary guide vane 121, second auxiliary guide vane 122, air duct 3, impeller 4, motor 5, support 6, bearing 7, shaft 8, the distance between two adjacent peripheral guide vanes 11 is S, the outer diameter of the first guide vane body 21 is R1, the outer diameter of the second guide vane body 22 is R2, the angle between the flow-through cross section of the first guide vane body 21 and the central axis is A, and the angle between the flow-through cross section of the second guide vane body 22 and the central axis is B. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figures 1-6 As shown, a high-efficiency guide vane structure includes a front guide vane structure 1 and a rear guide vane structure 2, wherein the front guide vane structure 1 adopts a grid structure and the rear guide vane structure 2 adopts a blade structure; characterized in that: the front guide vane structure 1 includes a peripheral ring guide vane 11 and a radial arc guide vane 12; multiple peripheral ring guide vanes 11 have coincident centers and different radii, and in the radial direction, the distance S between two adjacent peripheral ring guide vanes 11 is unequal along the radial direction and gradually increases, and the peripheral ring guide vane 11 has a plate-like structure; the radial arc guide vane 12 is arranged radially along the radial direction of the peripheral ring guide vane 11 and intersects with the peripheral ring guide vane 11, and is fan-shaped and centrally symmetrically distributed along the center of the front guide vane structure 1, and the radial arc guide vane 12 has a twisted structure, and the radial arc line of the part away from the center of the front guide vane structure 1 is part of the Archimedean spiral.

[0032] Further, the rear guide vane structure 2 comprises a first guide vane body 21 and a second guide vane body 22 arranged axially in sequence, the first guide vane body 21 comprises a plurality of first guide vanes 211 uniformly distributed in the circumferential direction, the second guide vane body 22 comprises a plurality of second guide vanes 222 uniformly distributed in the circumferential direction, the first guide vanes 211 and the second guide vanes 222 do not overlap in axial projection; the outer diameter of the first guide vane body 21 is R1, the outer diameter of the second guide vane body 22 is R2, wherein R1>R2.

[0033] Further, the first guide vane body 21 has an included angle A between the flow section and the center axis, and the second guide vane body 22 has an included angle B between the flow section and the center axis, wherein A<B.

[0034] Further, the first guide vane body 21 and the second guide vane body 22 are distributed in the shape of "eight" in the axial direction.

[0035] Further, the first guide vane 211 is a bent and twisted blade, and the second guide vane 222 is a straight plate type blade.

[0036] Further, the first guide vane 211 and the second guide vane 222 have opposite rotation directions / tilt directions.

[0037] Further, the distance S between the two adjacent circumferential ring guide vanes 11 is distributed in an arithmetic sequence in the radial direction.

[0038] Further, at the position where the circumferential ring guide vane 11 and the radial arc guide vane 12 intersect, the outlet surface of the radial arc guide vane 12 is provided with a first auxiliary guide vane 121 and a second auxiliary guide vane 122 which span across both sides of a single circumferential ring guide vane 11, wherein the first auxiliary guide vane 121 and the second auxiliary guide vane 122 are the same structure.

[0039] Further, the first auxiliary guide vane 121 tail edge, the second auxiliary guide vane 122 tail edge, and the radial arc guide vane 12 between the first auxiliary guide vane 121 and the second auxiliary guide vane 122 form an approximately equilateral triangle flow regulation structure.

[0040] A fan installed with a guide vane structure, characterized in that the fan comprises a guide vane 3, an impeller 4, a motor 5, a support part 6, a bearing 7, and a shaft 8, the motor 5 is installed in the support part 6 through the shaft 8 and the bearing 7, the impeller 4 is fixed at the other end of the shaft 8, the impeller 4 and the support part 6 are located in the guide vane 3, and the guide vane structure adopts a high-efficiency guide vane structure.

[0041] Further, the front guide vane structure 1 is fixedly installed at the inlet end of the guide vane 3.

[0042] Further, the rear guide vane structure 2 is fixedly installed on the support part 6 in sequence, and the support part 6 has a circular truncated cone structure in the flow direction.

[0043] The distance between two adjacent circumferential ring guide vanes is not equal in the radial direction and is gradually increased, and the circumferential ring guide vanes are plate-shaped structures; the radial arc guide vanes are arranged radially along the circumferential ring guide vanes in a radial direction and intersect the circumferential ring guide vanes, and are fan-shaped blocks and are distributed in a central symmetry along the center of the front guide vane structure, the radial arc guide vanes are bent and twisted structures, and the radial middle arc line of the part away from the center of the front guide vane structure is a part of an Archimedes spiral. At the position where the circumferential ring guide vanes intersect the radial arc guide vanes, the outlet surface of the radial arc guide vanes is provided with a first secondary guide vane and a second secondary guide vane which span both sides of a single circumferential ring guide vane; the circumferential and radial directions complement each other to improve the direction of the inlet airflow; in particular, the first secondary guide vane trailing edge, the second secondary guide vane trailing edge, and the radial arc guide vane between the first secondary guide vane and the second secondary guide vane form an approximately equilateral triangular flow regulation structure, which has a significant synergistic effect.

[0044] At the outlet, the rear guide vane structure includes a first guide vane body and a second guide vane body arranged in an axial direction, the first guide vane body includes a plurality of first guide vanes uniformly distributed in a circumferential direction, the second guide vane body includes a plurality of second guide vanes uniformly distributed in the circumferential direction, the first guide vanes and the second guide vanes do not overlap in an axial projection; the outer diameter of the first guide vane body is R1, the outer diameter of the second guide vane body is R2, where R1>R2, the flow cross section of the first guide vane body has an angle A with the center axis, the flow cross section of the second guide vane body has an angle B with the center axis, where A<B, the first guide vane body and the second guide vane body are arranged in an approximately "eight" shape in the axial direction, the above structure makes the airflow more smoothly enter the subsequent pipeline, reduces the degree of airflow turbulence, reduces the pressure loss, so as to ensure the stability and uniformity of the flow of the fan, and improve the efficiency of the fan.

[0045] The above embodiments are illustrative of the present application, but are not limiting of the present application. It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency guide vane structure, comprising a front guide vane structure (1) and a rear guide vane structure (2), wherein the front guide vane structure (1) adopts a grid structure, and the rear guide vane structure (2) adopts a blade structure; characterized in that: The front guide vane structure (1) comprises a plurality of circumferential ring guide vanes (11) and radial arc guide vanes (12); the plurality of circumferential ring guide vanes (11) are concentric and have different radii, and in the radial direction, the distance S between adjacent two circumferential ring guide vanes (11) is not equal and increases gradually in the radial direction, and the circumferential ring guide vanes (11) are plate-shaped structures; the radial arc guide vanes (12) are arranged radially along the circumferential ring guide vanes (11) and intersect with the circumferential ring guide vanes (11), and are fan-shaped blocks and are centrally symmetrically distributed along the center of the front guide vane structure (1), and the radial arc guide vanes (12) are bent and twisted structures, and the radial middle arc line of the part away from the center of the front guide vane structure (1) is part of an Archimedes spiral; the rear guide vane structure (2) comprises a first guide vane body (21) and a second guide vane body (22) arranged in the axial direction in sequence, the first guide vane body (21) comprises a plurality of first guide vanes (211) uniformly distributed in the circumferential direction, the second guide vane body (22) comprises a plurality of second guide vanes (222) uniformly distributed in the circumferential direction, the first guide vanes (211) and the second guide vanes (222) do not overlap in the axial projection; the outer diameter of the first guide vane body (21) is R1, the outer diameter of the second guide vane body (22) is R2, and R1>R2; the flow cross section of the first guide vane body (21) has an angle A with the central axis, and the flow cross section of the second guide vane body (22) has an angle B with the central axis, and A 2. A high efficiency guide vane structure as claimed in claim 1, wherein, The first guide vanes (211) are bent and twisted vanes, and the second guide vanes (222) are straight plate vanes.

3. A high efficiency guide vane structure as claimed in claim 1, wherein, The rotation directions of the first guide vanes (211) and the second guide vanes (222) are opposite.

4. A high efficiency guide vane structure as claimed in claim 1, wherein, The distance S between adjacent two circumferential ring guide vanes (11) is distributed in an arithmetic sequence in the radial direction.

5. A high efficiency guide vane structure as claimed in claim 1, wherein, At the position where the circumferential ring guide vane (11) intersects with the radial arc guide vane (12), the outlet surface of the radial arc guide vane (12) is provided with a first auxiliary guide vane (121) and a second auxiliary guide vane (122) which span both sides of a single circumferential ring guide vane (11), wherein the first auxiliary guide vane (121) and the second auxiliary guide vane (122) are the same in structure.

6. A high efficiency guide vane structure as claimed in claim 5, wherein, The first auxiliary guide vane (121) tail edge, the second auxiliary guide vane (122) tail edge, and the radial arc guide vane (12) between the first auxiliary guide vane (121) and the second auxiliary guide vane (122) form an approximately equilateral triangular rectification structure.

7. A fan having a guide vane structure, characterized by comprising: The fan comprises a guide cylinder (3), an impeller (4), a motor (5), a support part (6), a bearing (7), and a shaft (8), the motor (5) is installed in the support part (6) through the shaft (8) and the bearing (7), the impeller (4) is fixed to the other end of the shaft (8), and the impeller (4) and the support part (6) are located in the guide cylinder (3), and the guide vane structure adopts the high-efficiency guide vane structure in any one of claims 1 to 6.

8. A fan having a guide vane structure as set forth in claim 7, characterized by The front guide vane structure (1) is fixedly installed at the inlet end of the guide cylinder (3).

9. A fan having a guide vane structure as set forth in claim 7, characterized by The rear guide vane structure (2) is fixedly installed on the support part (6) in sequence, and the support part (6) has a circular truncated cone structure in the flow direction.

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