Efficient guide vane structure and fan provided with guide vane structure

Abstract

According to the efficient guide vane structure and the fan provided with the guide vane structure, the distance between every two adjacent circumferential ring guide vanes is unequal in the radial direction and is distributed in a gradually increasing mode, and the radial arc guide vanes are arranged at the crossed positions of the circumferential ring guide vanes and the radial arc guide vanes; a first auxiliary guide vane and a second auxiliary guide vane which stretch across the two sides of the single circumferential ring guide vane are arranged on the outlet face of the radial arc guide vane. The circumferential direction and the radial direction complement each other to improve the air flow direction of an inlet, so that a remarkable synergistic effect is achieved; the rear guide vane structure comprises the first guide vane body and the second guide vane body which are sequentially arranged in the axial direction, the axial projection of the first guide vane body and the axial projection of the second guide vane body are not overlapped, airflow can enter a subsequent pipeline more smoothly, the airflow turbulence degree is reduced, pressure loss is reduced, and therefore the flow stability and uniformity of the fan can be guaranteed, and the efficiency of the fan is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid machinery, specifically to a guide vane structure, and more specifically to a fan equipped with the guide vane structure. Background Art

[0002] The fan guide vane is an important component in the fan, usually installed at the inlet or outlet of the fan impeller. Structurally, it usually consists of multiple blades; functionally, the inlet guide vane is mainly used to adjust the air flow direction and flow path entering the impeller, enabling the air flow to enter the impeller at an appropriate angle, reducing impact loss, and improving the fan efficiency. The outlet guide vane is mainly used to adjust the air flow direction leaving the impeller, making the air flow enter the subsequent pipeline more smoothly, reducing the degree of air flow disorder, and reducing pressure loss.

[0003] The prior art CN214330992U discloses a rear guide vane and an axial flow fan applying the rear guide vane, including multiple blades 11 arranged circumferentially. A disk 13 is provided at the blade root of the blade 11. Two adjacent blades 11 are spliced to form a rear guide vane 1 through the disk 13. A dovetail protrusion 16 is provided on one side of the disk 13 in the circumferential direction, and a dovetail groove 17 adapted to the dovetail protrusion 16 is provided on the other side of the disk 13 in the circumferential direction. Between two adjacent blades 11, the dovetail protrusion 16 of one blade 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, and the distance of the disk 13 in the axis direction of the rear guide vane 1 is the axial width B, where 0.2·B ≤ L ≤ B. Multiple blades are spliced through adjacent disks to form a rear guide vane, with a simple structure, convenient assembly, and low production cost. After the axial flow fan adopts this rear guide vane, the rear guide vane and the protective net are connected through a ferrule, which is convenient for disassembly and assembly, and the ferrule can be stamped, with high production efficiency.

[0004] However, the above structure has limitations in design, and in the actual application process of the fan, the improvement effect on the inlet and outlet flow states is minimal, resulting in large pressure loss and low efficiency after the fan operates. Therefore, in view of these problems, the applicant proposes a high-efficiency guide vane structure and a fan equipped with the guide vane structure. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a high-efficiency guide vane structure and a fan equipped with the guide vane structure.

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

[0007] A high-efficiency guide vane structure 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 characteristic is that: the front guide vane structure comprises a circumferential ring guide vane and a radial arc guide vane; the centers of the plurality of circumferential ring guide vanes coincide and the radii are different, and in the radial direction, the distances between two adjacent circumferential ring guide vanes are unequal in the radial direction and are distributed in a gradually increasing manner, and the circumferential ring guide vanes are plate-like structures; the radial arc guide vanes are radially arranged in the radial direction of the circumferential ring guide vanes, cross-intersect with the circumferential ring guide vanes, are fan-shaped and block-shaped, and are distributed in a centrally symmetrical manner along the center of the front guide vane structure, and the radial arc guide vanes are bending and twisting structures, and the radial mid-arc line of the part away from the center of the front guide vane structure is a part of the Archimedean spiral.

[0008] Furthermore, the rear guide vane structure includes a first guide vane body and a second guide vane body arranged in sequence axially, the first guide vane includes a plurality of first guide vanes evenly distributed along the circumferential direction, the second guide vane body includes a plurality of second guide vanes evenly distributed along the circumferential direction, and the first guide vane and the second guide vane do not overlap in 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, there is an angle A between the flow-passing middle cross section of the first guide vane body and the central axis, and there is an angle B between the flow-passing middle cross section of the second guide vane body and the central axis, wherein A<B.

[0010] Furthermore, the first guide vane body and the second guide vane body are distributed in an "eight" shape in the axial direction.

[0011] Furthermore, the first guide vane is a twisted blade, and the second guide vane is a straight blade.

[0012] Further, the rotation direction / inclination direction of the first guide vane and the second guide vane are opposite.

[0013] Furthermore, the distance S between two adjacent circumferential ring guide vanes is distributed in an arithmetic progression along the radial direction.

[0014] Furthermore, at the position where the circumferential 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 spanning both sides of the single circumferential ring guide vane, wherein the first auxiliary guide vane and the second auxiliary guide vane have the same structure.

[0015] Furthermore, the trailing edge of the first auxiliary guide vane, the trailing edge of the second auxiliary guide vane, and the radial arc guide vanes between the first auxiliary guide vane and the second auxiliary guide vane form a rectifying structure quasi-equilateral triangle.

[0016] A fan equipped with a guide vane structure, characterized in that the fan includes an air guide tube, 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, the impeller and the support part are both located in the air guide tube, and the guide vane structure adopts a high-efficiency guide vane structure.

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

[0018] Furthermore, the rear guide vane structure is fixedly mounted on the support portion in sequence, and the support portion is a truncated cone structure in the flow direction.

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

[0020] 1. For the inlet, the distance between two adjacent circumferential ring guide vanes is unequal in radial direction and is distributed in a gradually increasing manner. The circumferential ring guide vanes are plate-like structures; the radial arc guide vanes are arranged radially along the radial direction of the circumferential ring guide vanes, and intersect with the circumferential ring guide vanes, and are fan-shaped and block-shaped and distributed symmetrically along the center of the front guide vane structure. The radial arc guide vanes are bent and twisted structures, and the radial mid-arc line of the part away from the center of the front guide vane structure is a part of the Archimedean spiral. At the intersection of the circumferential ring guide vane and 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 spanning both sides of a single circumferential ring guide vane; the circumferential and radial directions complement each other to improve the inlet airflow direction; in particular, the trailing edge of the first auxiliary guide vane, the trailing edge of the second auxiliary guide vane, and the radial arc guide vane between the first auxiliary guide vane and the second auxiliary guide vane form a rectifying structure similar to an equilateral triangle, which plays a more significant synergistic role.

[0021] 2. For the outlet, the rear guide vane structure includes a first guide vane body and a second guide vane body arranged in sequence axially, the first guide vane includes a plurality of first guide vanes evenly distributed along the circumferential direction, the second guide vane body includes a plurality of second guide vanes evenly distributed along the circumferential direction, and the first guide vane and the second guide vane do not overlap in 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, an angle A is formed between the flow-passing middle cross-section of the first guide vane body and the central axis, an angle B is formed between the flow-passing middle cross-section of the second guide vane body and the central axis, wherein A<B, the first guide vane body and the second guide vane body are distributed in an "eight" shape in the axial direction, and the above structure enables the airflow to enter the subsequent pipeline more smoothly, reduces the degree of airflow turbulence, and reduces pressure loss, thereby ensuring the stability and uniformity of the fan flow and improving the fan efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0025] Figure 4 is Figure 3 a partially enlarged view of the front guide vane structure in

[0026] Figure 5 This is the schematic axial projection of the rear guide vane structure;

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

[0028] In the figure: the front guide vane structure 1, the rear guide vane structure 2, the circumferential ring guide vanes 11, the radial arc guide vanes 12, the first guide vane body 21, the second guide vane body 22, the first guide vanes 211, the second guide vanes 222, the first auxiliary guide vanes 121, the second auxiliary guide vanes 122, the air duct 3, the impeller 4, the motor 5, the support part 6, the bearing 7, the shaft 8, the distance between two adjacent circumferential ring 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 included angle between the mid-flow cross-section of the first guide vane body 21 and the central axis is A, and the included angle between the mid-flow cross-section of the second guide vane body 22 and the central axis is B. Detailed Embodiments

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

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

[0031] As Figure 1-6 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 circumferential ring guide vanes 11 and radial arc guide vanes 12; the centers of multiple circumferential ring guide vanes 11 coincide and have different radii. Radially, the distance S between two adjacent circumferential ring guide vanes 11 is unequal along the radial direction and shows an increasing distribution, and the circumferential ring guide vanes 11 are plate-like structures; the radial arc guide vanes 12 are arranged radially in a radial pattern along the circumferential ring guide vanes 11 and intersect with the circumferential ring guide vanes 11, and are fan-shaped blocks and are centrosymmetrically distributed along the center of the front guide vane structure 1. The radial arc guide vanes 12 are bent and twisted structures, and the radial mid-arc line of the part away from the center of the front guide vane structure 1 is a part of an Archimedean spiral.

[0032] Further, the rear guide vane structure 2 includes a first guide vane body 21 and a second guide vane body 22 arranged axially in sequence. The first guide vane body 21 includes a plurality of first guide vanes 211 evenly distributed circumferentially, and the second guide vane body 22 includes a plurality of second guide vanes 222 evenly distributed circumferentially. The axial projections of the first guide vanes 211 and the second guide vanes 222 do not overlap; the outer diameter of the first guide vane body 21 is R1, and the outer diameter of the second guide vane body 22 is R2, where R1 > R2.

[0033] Further, the mid-flow cross-section of the first guide vane body 21 forms an angle A with the central axis, and the mid-flow cross-section of the second guide vane body 22 forms an angle B with the central axis, where A < B.

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

[0035] Further, the first guide vanes 211 are curved and twisted blades, and the second guide vanes 222 are straight plate blades.

[0036] Further, the rotation directions / inclination directions of the first guide vanes 211 and the second guide vanes 222 are opposite.

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

[0038] Further, at the position where the circumferential ring guide vane 11 intersects with the radial arc guide vane 12, a first auxiliary guide vane 121 and a second auxiliary guide vane 122 spanning both sides of a single circumferential ring guide vane 11 are provided on the outlet surface of the radial arc guide vane 12, where the first auxiliary guide vane 121 and the second auxiliary guide vane 122 have the same structure.

[0039] Further, the trailing edge of the first auxiliary guide vane 121, the trailing edge of the second auxiliary guide vane 122, and the radial arc guide vane 12 between the first auxiliary guide vane 121 and the second auxiliary guide vane 122 form a rectifying structure body similar to an equilateral triangle.

[0040] A fan equipped with a guide vane structure, characterized in that the fan includes 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. The impeller 4 and the support part 6 are both located inside the guide cylinder 3, and the guide vane structure adopts an efficient guide vane structure.

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

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

[0043] At the inlet, the distance between two adjacent circumferential ring guide vanes is unequal in radial direction and is distributed in a gradually increasing manner. The circumferential ring guide vanes are plate-like structures; the radial arc guide vanes are arranged radially along the radial direction of the circumferential ring guide vanes, and intersect with the circumferential ring guide vanes, and are fan-shaped and block-shaped and distributed symmetrically along the center of the front guide vane structure. The radial arc guide vanes are bent and twisted structures, and the radial mid-arc line of the part away from the center of the front guide vane structure is a part of the Archimedean spiral. At the intersection of the circumferential ring guide vane and 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 spanning both sides of a single circumferential ring guide vane; the circumferential and radial directions complement each other to improve the inlet airflow direction; in particular, the trailing edge of the first auxiliary guide vane, the trailing edge of the second auxiliary guide vane, and the radial arc guide vane between the first auxiliary guide vane and the second auxiliary guide vane form a rectifying structure similar to an equilateral triangle, which plays a more significant synergistic role.

[0044] At the outlet, the rear guide vane structure includes a first guide vane body and a second guide vane body arranged in sequence axially, the first guide vane includes a plurality of first guide vanes evenly distributed along the circumferential direction, the second guide vane body includes a plurality of second guide vanes evenly distributed along the circumferential direction, and the first guide vane and the second guide vane do not overlap in 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, an angle A is formed between the flow-passing middle cross-section of the first guide vane body and the central axis, an angle B is formed between the flow-passing middle cross-section of the second guide vane body and the central axis, wherein A<B, the first guide vane body and the second guide vane body are distributed in an "eight" shape in the axial direction, and the above structure enables the airflow to enter the subsequent pipeline more smoothly, reduces the degree of airflow turbulence, and reduces pressure loss, thereby ensuring the stability and uniformity of the fan flow and improving the fan efficiency.

[0045] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An efficient 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) includes a circumferential ring guide vane (11) and a radial arc guide vane (12); a plurality of circumferential ring guide vanes (11) have the same center of the circle but different radii. In the radial direction, the distance S between two adjacent circumferential ring guide vanes (11) is unequal along the radial direction and shows an increasing distribution. The circumferential ring guide vane (11) is a plate-like structure; the radial arc guide vane (12) is arranged radially in a radial direction along the circumferential ring guide vane (11), intersects with the circumferential ring guide vane (11) crosswise, and is a fan-shaped block and is centrosymmetrically distributed along the center of the front guide vane structure (1). The radial arc guide vane (12) is a curved and twisted structure, and the radial middle arc line of the part far from the center of the front guide vane structure (1) is a part of an Archimedean spiral.

2. The efficient guide vane structure according to claim 1, characterized in that The rear guide vane structure (2) includes a first guide vane body (21) and a second guide vane body (22) arranged axially in sequence. The first guide vane body (21) includes a plurality of first guide vanes (211) evenly distributed in the circumferential direction. The second guide vane body (22) includes a plurality of second guide vanes (222) evenly distributed in the circumferential direction. The axial projections of the first guide vanes (211) and the second guide vanes (222) do not overlap; the outer diameter of the first guide vane body (21) is R1, and the outer diameter of the second guide vane body (22) is R2, where R1 > R2.

3. The efficient guide vane structure according to claim 2, characterized in that, The cross-sectional area of the flow passage of the first guide vane body (21) forms an angle A with the central axis, and the cross-sectional area of the flow passage of the second guide vane body (22) forms an angle B with the central axis, where A < B.

4. An efficient guide vane structure according to claim 2, characterized in that, The first guide vane body (21) and the second guide vane body (22) are distributed in a shape similar to an "eight" in the axial direction.

5. The efficient guide vane structure according to claim 2, characterized in that, The first guide vane (211) is a curved and twisted vane, and the second guide vane (222) is a straight vane.

6. The efficient guide vane structure according to claim 2, characterized in that, The rotation directions / inclination directions of the first guide vane (211) and the second guide vane (222) are opposite.

7. An efficient guide vane structure according to claim 1, characterized in that, The distance S between two adjacent circumferential ring guide vanes (11) is distributed in an arithmetic progression along the radial direction.

8. An efficient guide vane structure according to claim 1, characterized in that, At the position where the circumferential ring guide vane (11) intersects with the radial arc guide vane (12), a first auxiliary guide vane (121) and a second auxiliary guide vane (122) that span both sides of a single circumferential ring guide vane (11) are arranged on the outlet surface of the radial arc guide vane (12), where the first auxiliary guide vane (121) and the second auxiliary guide vane (122) have the same structure.

9. An efficient guide vane structure according to claim 8, characterized in that, The trailing edge of the first auxiliary guide vane (121), the trailing edge of the second auxiliary guide vane (122), and the radial arc guide vane (12) between the first auxiliary guide vane (121) and the second auxiliary guide vane (122) form a rectifying structure body similar to an equilateral triangle.

10. A fan equipped with a guide vane structure, characterized in that, The blower includes a wind 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). The impeller (4) and the support part (6) are both located inside the wind guide cylinder (3). The guide vane structure adopts the high-efficiency guide vane structure described in any one of claims 1 to 9.

11. The fan with a guide vane structure according to claim 10, characterized in that, The front guide vane structure (1) is fixedly installed at the inlet end of the wind guide cylinder (3).

12. A fan equipped with a guide vane structure as claimed in claim 10, wherein, The rear guide vane structure (2) is fixedly installed on the support part (6) in sequence. The support part (6) is in a frustum structure in the flow direction.

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