A guide blade structure of a diagonal flow fan

Abstract

The invention discloses a guide vane structure for a diagonal flow fan, wherein the guide vane structure includes an inlet guide vane structure and a return guide vane structure; the inlet guide vane structure includes an arc-shaped outer guide wall and an annular inner guide wall, and the arc-shaped outer guide wall is connected to the annular inner guide wall through an intermediate guide vane; the return guide vane structure includes a fixed guide vane and a movable guide vane, and the inlet guide vane structure also includes an inner ejection channel and an outer boost flow stabilization channel, the inner ejection channel is arranged along the inner wall of the annular inner guide wall, and the outer boost flow stabilization channel is arranged along the inner wall of the arc-shaped outer guide wall, and includes an outer boost flow stabilization channel inlet section, an outer boost flow stabilization channel first outlet section, and an outer boost flow stabilization channel second outlet section. Due to the improvement of the guide vane structure for the diagonal flow fan, the flow characteristics are improved, the noise is reduced, and the conveying efficiency is improved.

Description

Technical Field

[0001] The invention relates to a guide blade structure of an oblique flow fan, and in particular to a guide blade structure capable of improving flow guiding efficiency and reducing wind resistance and noise. Background Art

[0002] A diagonal flow fan is a fluid machine that has multiple rotating blades arranged radially with the hub as the center, and blows air in multiple directions to the rotating blades while rotating them through a motor, thereby promoting heat dissipation in air-cooled heat exchangers such as electric fans or ventilation fans, or radiators or condensers in cars. As products such as life production develop towards intensification and high power, the demand for ventilation and heat dissipation is increasing, and the ventilation performance of diagonal flow fans is attracting more and more attention. Therefore, it is particularly important to design and study diagonal flow fans to improve their characteristics.

[0003] Prior art CN104074805A discloses a centrifugal fan with a double-guide vane axial guide, which adjusts the fan wind pressure and flow rate by fixing the angle of the second-stage guide and changing the angle of the first-stage guide vane. While changing the angle of the first-stage guide vane to change the fan wind pressure and flow rate, the airflow is caused to have a certain pre-rotation before entering the second-stage guide vane, and the guide vane angle of the second-stage guide vane is fixed at the optimal angle required by the fan impeller, that is, to ensure that the airflow always enters and passes through the fan impeller blade channel smoothly at the optimal pre-rotation angle, so as to keep the fan running efficiently. The optimal angle of the guide vane of the secondary guide vane can be determined according to the impeller installation angle designed for the fan, or according to experiments.

[0004] However, the above-mentioned fans all have design limitations, poor adaptability, high power consumption, unstable air output, low heat dissipation efficiency, high noise and strong vibration. Therefore, in response to these problems, the applicant proposes a diagonal flow fan guide vane structure to solve the above-mentioned problems so as to improve the flow characteristics, reduce the impeller wind resistance and noise, and thus improve the air output effect and efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a diagonal flow fan guide vane structure.

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

[0007] A guide vane structure of a diagonal flow fan, comprising a motor 1, the motor 1 is connected to a hub 2 and drives it to rotate, a blade 3 is mounted on the hub 2, and the outer edge of the blade 3 is fixed to the inner side of an impeller cover ring 11; the characteristics are as follows: the guide vane structure comprises an inlet guide vane structure and a return guide vane structure; the inlet guide vane structure is fixed to a housing, and comprises an arc-shaped outer guide wall 4 and an annular inner guide wall 5, and the arc-shaped outer guide wall 4 and the annular inner guide wall 5 are connected through an intermediate guide vane 6; the return guide vane structure comprises a fixed guide vane 9 and a movable guide vane 10, and the fixed guide vane 9 is mounted on the arc-shaped outer guide wall 4, the movable guide vane 10 is installed on the inner side of the inlet of the impeller cover ring 11, and the fixed guide vane 9 and the movable guide vane 10 are closely matched to guide and pressurize the gas; the inlet guide vane structure also includes an inner injection channel 7 and an outer pressurization stabilizing flow channel 8, wherein the inner injection channel 7 is arranged along the inner wall of the annular inner guide wall 5, the inner injection channel 7 is an arc-shaped flow channel, the inner injection channel inlet 71 is located in front of the leading edge side of the intermediate guide vane 6, the distance between the inner injection channel inlet 71 and the leading edge of the intermediate guide vane 6 is L1, and in the direction of the airflow inlet, the inner injection channel inlet The angle between the inner ejection channel outlet 72 and the horizontal axis is A, the inner ejection channel outlet 72 is located behind the trailing edge of the intermediate guide vane 6, the distance between the inner ejection channel outlet 72 and the trailing edge of the intermediate guide vane 6 is L2, and in the airflow outlet direction, the angle between the inner ejection channel outlet 72 and the horizontal axis is B; the outer boost flow stabilizing channel 8 is arranged along the inner wall of the arc-shaped outer guide wall 4, and includes an outer boost flow stabilizing channel inlet section 80, an outer boost flow stabilizing channel first outlet section 81, and an outer boost flow stabilizing channel second outlet section 82, and the outer boost flow stabilizing channel inlet section 80 is aligned with the horizontal axis. The axis is parallel, the inlet is located on the inner wall of the arc-shaped outer guide wall 4, the first outlet section 81 of the external boost steady flow channel is parallel to the horizontal axis, the first outlet is located on the outer wall of the arc-shaped outer guide wall 4 and the airflow outlet direction of the first outlet is directly opposite to the fixed guide vane 9, the angle between the second outlet section 82 of the external boost steady flow channel and the horizontal axis is C, and the outlet of the second outlet section 82 of the external boost steady flow channel is located on the outlet side end wall of the arc-shaped outer guide wall 4; wherein L1:L2=0.2-0.8, A+B=30°-60°, B=(1.1-1.5)C.

[0008] Further, L1:L2=0.5, and L1+L2=(0.1-0.3)R, where R is the inlet radius of the impeller.

[0009] Further, A+B=50°.

[0010] Further, B=1.2C.

[0011] Further, A+C=20°-50°.

[0012] Furthermore, a rectangular groove 62 is provided at one end of the intermediate guide vane 6 connected to the annular inner guide wall 5 .

[0013] Furthermore, an arc-shaped groove 61 is provided at one end of the intermediate guide vane 6 connected to the arc-shaped outer guide wall 4 .

[0014] Furthermore, a spherical protrusion 101 is provided on the leading edge of the movable guide vane 10 , and an arc-shaped groove matching with the spherical protrusion 101 is provided on the fixed guide vane 9 .

[0015] Furthermore, a rectangular protrusion 102 is provided on the leading edge of the movable guide vane 10 , and a rectangular groove matching with the rectangular protrusion 102 is provided on the fixed guide vane 9 .

[0016] Furthermore, the spherical protrusions 101 and the rectangular protrusions 102 are alternately distributed on the leading edge of the movable guide vane 10 .

[0017] The invention discloses a diagonal flow fan guide vane structure, wherein the guide vane structure includes an inlet guide vane structure and a return guide vane structure; the inlet guide vane structure includes an arc-shaped outer guide wall 4 and an annular inner guide wall 5, and the arc-shaped outer guide wall 4 is connected to the annular inner guide wall 5 through an intermediate guide vane 6; the return guide vane structure includes a fixed guide vane 9 and a movable guide vane 10, and the inlet guide vane structure also includes an inner ejection channel 7 and an outer boost flow stabilization channel 8, the inner ejection channel 7 is arranged along the inner wall of the annular inner guide wall 5, and the outer boost flow stabilization channel 8 is arranged along the inner wall of the arc-shaped outer guide wall 4, and includes an outer boost flow stabilization channel inlet section 80, an outer boost flow stabilization channel first outlet section 81, and an outer boost flow stabilization channel second outlet section 82. Due to the improvement of the diagonal flow fan guide vane structure, the flow characteristics are improved, the noise is reduced, and the conveying efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a diagonal flow fan;

[0019] Figure 2 It is a cross-sectional view of a diagonal flow fan;

[0020] Figure 3 is a schematic structural diagram of the intermediate guide vane 6;

[0021] Figure 4 It is a schematic diagram of the structure of the fixed guide vane 9 and the movable guide vane 10.

[0022] In the figure: motor 1, hub 2, blade 3, arc-shaped outer guide wall 4, annular inner guide wall 5, intermediate guide vane 6, arc-shaped groove 61, rectangular groove 62, inner ejection channel 7, inner ejection channel inlet 71, inner ejection channel outlet 72, external boost steady flow channel 8, outer boost steady flow channel inlet section 80, outer boost steady flow channel first outlet section 81, outer boost steady flow channel second outlet section 82, fixed guide vane 9, movable guide vane 10, spherical protrusion 101, rectangular protrusion 102, impeller cover ring 11, distance L1 between inner ejection channel inlet 71 and leading edge of intermediate guide vane 6, distance L2 between inner ejection channel outlet 72 and trailing edge of intermediate guide vane 6, angle A between inner ejection channel inlet 71 and horizontal axis, angle B between inner ejection channel outlet 72 and horizontal axis, angle C between second outlet section 82 of outer boost steady flow channel and horizontal axis, inlet radius R of impeller. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1-4As shown, a guide vane structure of a diagonal flow fan includes a motor 1, which is connected to a hub 2 and drives it to rotate. A blade 3 is installed on the hub 2, and the outer edge of the blade 3 is fixed to the inner side of an impeller cover ring 11; the characteristics are as follows: the guide vane structure includes an inlet guide vane structure and a return guide vane structure; the inlet guide vane structure is fixed to the housing, and includes an arc-shaped outer guide wall 4 and an annular inner guide wall 5, and the arc-shaped outer guide wall 4 and the annular inner guide wall 5 are connected through an intermediate guide vane 6; the return guide vane structure includes a fixed guide vane 9 and a movable guide vane 10, and the fixed guide vane 9 is installed on the arc-shaped outer guide wall 4 and the ... On the outside of the guide wall 4, the movable guide vane 10 is installed on the inner side of the inlet of the impeller cover ring 11, and the fixed guide vane 9 and the movable guide vane 10 are closely matched to guide and pressurize the gas; the inlet guide vane structure also includes an inner injection channel 7 and an outer pressurization stabilizing flow channel 8, wherein the inner injection channel 7 is arranged along the inner wall of the annular inner guide wall 5, the inner injection channel 7 is an arc-shaped flow channel, the inner injection channel inlet 71 is located in front of the leading edge side of the intermediate guide vane 6, and the distance between the inner injection channel inlet 71 and the leading edge of the intermediate guide vane 6 is L1, and in the direction of the airflow inlet, the inner injection channel inlet The angle between the outlet 71 and the horizontal axis is A, the outlet 72 of the inner ejection channel is located behind the trailing edge of the intermediate guide vane 6, the distance between the outlet 72 of the inner ejection channel and the trailing edge of the intermediate guide vane 6 is L2, and in the airflow outlet direction, the angle between the outlet 72 of the inner ejection channel and the horizontal axis is B; the external boost flow stabilizing channel 8 is arranged along the inner wall of the arc-shaped outer guide wall 4, and includes an inlet section 80 of the external boost flow stabilizing channel, a first outlet section 81 of the external boost flow stabilizing channel, and a second outlet section 82 of the external boost flow stabilizing channel. The inlet section 80 of the external boost flow stabilizing channel is aligned with the horizontal axis. The axis is parallel, the inlet is located on the inner wall of the arc-shaped outer guide wall 4, the first outlet section 81 of the external boost steady flow channel is parallel to the horizontal axis, the first outlet is located on the outer wall of the arc-shaped outer guide wall 4 and the airflow outlet direction of the first outlet is directly opposite to the fixed guide vane 9, the angle between the second outlet section 82 of the external boost steady flow channel and the horizontal axis is C, and the outlet of the second outlet section 82 of the external boost steady flow channel is located on the outlet side end wall of the arc-shaped outer guide wall 4; wherein L1:L2=0.2-0.8, A+B=30°-60°, B=(1.1-1.5)C.

[0026] Further, L1:L2=0.5, and L1+L2=(0.1-0.3)R, where R is the inlet radius of the impeller.

[0027] Further, A+B=50°.

[0028] Further, B=1.2C.

[0029] Further, A+C=20°-50°.

[0030] Furthermore, a rectangular groove 62 is provided at one end of the intermediate guide vane 6 connected to the annular inner guide wall 5 .

[0031] Furthermore, an arc-shaped groove 61 is provided at one end of the intermediate guide vane 6 connected to the arc-shaped outer guide wall 4 .

[0032] Furthermore, a spherical protrusion 101 is provided on the leading edge of the movable guide vane 10 , and an arc-shaped groove matching with the spherical protrusion 101 is provided on the fixed guide vane 9 .

[0033] Furthermore, a rectangular protrusion 102 is provided on the leading edge of the movable guide vane 10 , and a rectangular groove matching with the rectangular protrusion 102 is provided on the fixed guide vane 9 .

[0034] Furthermore, the spherical protrusions 101 and the rectangular protrusions 102 are alternately distributed on the leading edge of the movable guide vane 10 .

[0035] The invention discloses a diagonal flow fan guide vane structure, wherein the guide vane structure includes an inlet guide vane structure and a return guide vane structure; the inlet guide vane structure includes an arc-shaped outer guide wall 4 and an annular inner guide wall 5, and the arc-shaped outer guide wall 4 is connected to the annular inner guide wall 5 through an intermediate guide vane 6; the return guide vane structure includes a fixed guide vane 9 and a movable guide vane 10, and the inlet guide vane structure also includes an inner ejection channel 7 and an outer boost flow stabilization channel 8, the inner ejection channel 7 is arranged along the inner wall of the annular inner guide wall 5, and the outer boost flow stabilization channel 8 is arranged along the inner wall of the arc-shaped outer guide wall 4, and includes an outer boost flow stabilization channel inlet section 80, an outer boost flow stabilization channel first outlet section 81, and an outer boost flow stabilization channel second outlet section 82. Due to the improvement of the diagonal flow fan guide vane structure, the flow characteristics are improved, the noise is reduced, and the conveying efficiency is improved.

Claims

1. A guide vane structure of a diagonal flow fan, comprising a motor (1), the motor (1) being connected to a hub (2) and driving the hub to rotate, a blade (3) being mounted on the hub (2), and an outer edge of the blade (3) being fixed to an inner side of an impeller cover ring (11); characterized in that: The guide vane structure comprises an inlet guide vane structure and a return guide vane structure; the inlet guide vane structure is fixed on the housing, and comprises an arc-shaped outer guide wall (4) and an annular inner guide wall (5); the arc-shaped outer guide wall (4) and the annular inner guide wall (5) are connected via an intermediate guide vane (6); the return guide vane structure comprises a fixed guide vane (9) and a movable guide vane (10); the fixed guide vane (9) is installed on the outer side of the arc-shaped outer guide wall (4), and the movable guide vane (10) is installed on the inner side of the inlet of the impeller cover ring (11); the fixed guide vane (9) and the movable guide vane (10) are closely matched to the gas The inlet guide vane structure further comprises an inner ejection channel (7) and an outer pressure-boosting flow-stabilizing channel (8), wherein the inner ejection channel (7) is arranged along the inner wall of the annular inner guide wall (5), the inner ejection channel (7) is an arc-shaped flow channel, the inlet (71) of the inner ejection channel is located in front of the leading edge side of the middle guide vane (6), the distance between the inlet (71) of the inner ejection channel and the leading edge of the middle guide vane (6) is L1, in the direction of the airflow inlet, the angle between the inlet (71) of the inner ejection channel and the horizontal axis is A, the outlet (72) of the inner ejection channel is located in the middle guide vane (6), and the inlet (71) of the inner ejection channel is L2. Behind the trailing edge of the blade (6), the distance between the inner ejector channel outlet (72) and the trailing edge of the intermediate guide vane (6) is L2, and in the direction of the airflow outlet, the angle between the inner ejector channel outlet (72) and the horizontal axis is B; the outer boost flow stabilizing channel (8) is arranged along the inner wall of the arc-shaped outer guide wall (4), and includes an outer boost flow stabilizing channel inlet section (80), an outer boost flow stabilizing channel first outlet section (81), and an outer boost flow stabilizing channel second outlet section (82), the outer boost flow stabilizing channel inlet section (80) is parallel to the horizontal axis, and the inlet is located at the arc-shaped outer guide wall (4). The inner side wall of the outer guide wall (4), the first outlet section (81) of the outer boost flow stabilizing channel is parallel to the horizontal axis, the first outlet is located on the outer side wall of the arc-shaped outer guide wall (4) and the airflow outlet direction of the first outlet is directly opposite to the fixed guide vane (9), the angle between the second outlet section (82) of the outer boost flow stabilizing channel and the horizontal axis is C, and the outlet of the second outlet section (82) of the outer boost flow stabilizing channel is located on the outlet side end wall of the arc-shaped outer guide wall (4); wherein L1:L2=0.2-0.8, A+B=30°-60°, and B=(1.1-1.5)C.

2. A diagonal flow fan guide vane structure as claimed in claim 1, characterized in that: L1:L2=0.5, and L1+L2=(0.1-0.3)R, where R is the inlet radius of the impeller.

3. The guide vane structure of a diagonal flow fan according to claim 1, characterized in that: A+B=50°.

4. The guide vane structure of a diagonal flow fan according to claim 1, characterized in that: B=1.2C.

5. The guide vane structure of a diagonal flow fan according to claim 1, characterized in that: A+C=20°-50°.

6. The guide vane structure of a diagonal flow fan according to claim 1, characterized in that: One end of the intermediate guide vane (6) connected to the annular inner guide wall (5) is provided with a rectangular groove (62).

7. The guide vane structure of a diagonal flow fan according to claim 5, characterized in that: An arc-shaped groove (61) is provided at one end of the intermediate guide vane (6) connected to the arc-shaped outer guide wall (4).

8. The guide vane structure of a diagonal flow fan according to claim 1, characterized in that: The front edge of the movable guide vane (10) is provided with a spherical protrusion (101), and the fixed guide vane (9) is provided with an arc-shaped groove matching the spherical protrusion (101).

9. A diagonal flow fan guide vane structure as claimed in claim 8, characterized in that: The front edge of the movable guide vane (10) is provided with a rectangular protrusion (102), and the fixed guide vane (9) is provided with a rectangular groove matching the rectangular protrusion (102).

10. The guide vane structure of a diagonal flow fan according to claim 9, characterized in that: The spherical protrusions (101) and the rectangular protrusions (102) are distributed alternately on the leading edge of the movable guide vane (10).

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