A diagonal flow fan

Abstract

The invention discloses a diagonal flow fan, comprising an outer guide ring structure, an inner guide ring structure, an outer ring groove of a blade, and an inner ring groove of a blade; the outer guide ring structure is composed of an outer guide ring 1 and an outer guide ring 2, and the adjacent edges of the outer guide ring 1 and the outer guide ring 2 intersect at point A; the inner guide ring structure is composed of an inner guide ring 1 and an inner guide ring 2, and the adjacent edges of the inner guide ring 1 and the inner guide ring 2 intersect at point B; wherein the outer guide ring structure is located in the outer ring groove of the blade, and the inner guide ring structure is located in the inner ring groove of the blade; wherein the tangent angle of the adjacent edges of the outer guide ring 1 and the outer guide ring 2 at the intersection point A is 5°-8°, and the tangent angle of the adjacent edges of the inner guide ring 1 and the inner guide ring 2 at the intersection point B is 9°-12°. The fan structure improves the flow characteristics, reduces the vibration of the impeller, thereby improving the air outlet effect and efficiency, and prolongs the service life.

Description

Technical Field

[0001] The invention relates to a diagonal flow fan, in particular to a diagonal flow fan with improved flow characteristics and reduced impeller vibration. Background Art

[0002] With the development of high-tech, diagonal flow fans are currently common induced draft or ventilation equipment. As life and production products develop towards intensive and high-power directions, 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 carry out design and research on the characteristics of diagonal flow fans.

[0003] Prior art CN211623814U discloses a fan impeller provided with a scale transition layer, wherein the scale transition layer can effectively reduce the force on the blade root near the air inlet side. On the one hand, the scale transition layer can provide support for the connection position between the blade and the base plate, and the scale-shaped protrusion can cut off the transmission of internal stress and reduce the internal stress concentrated at the stress concentration point. At the same time, the scale transition layer can also increase the thickness of the connection position between the blade and the base plate in a certain sense, and enhance the structural strength of the blade. Moreover, the scale transition layer can also play a role in guiding the flow. When the airflow flows through the scale transition layer, a very small vortex can be formed at the end of the scale-shaped protrusion, which helps to keep the airflow attached to the scale transition layer and avoid the chaotic airflow from diffusing to the mainstream area to form turbulence, so as to reduce the pressure loss of the airflow when it flows.

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

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

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

[0007] A diagonal flow fan 1 includes a motor 2, an impeller inner ring 3, an impeller outer ring 4, an impeller inner ring bracket 5, and blades 6; wherein the blades 6 include a blade leading edge 61 and a blade trailing edge 62; and further includes an outer guide ring structure 7, an inner guide ring structure 8, a blade outer ring groove 9, and a blade inner ring groove 10; wherein the outer guide ring structure 7 is formed on the inner wall of the blade leading edge 61 side of the impeller outer ring 4, and the inner guide ring structure 8 is formed on the outer wall of the blade trailing edge 62 side of the impeller inner ring 3, the outer guide ring structure 7 is composed of an outer guide ring 1 71 and an outer guide ring 2 72, and the adjacent edges of the outer guide ring 1 71 and the outer guide ring 2 72 intersect at point A, the inner guide ring structure 8 is composed of an inner guide ring 1 81 and an inner guide ring 2 82, and the inner guide ring The adjacent edges of the blade 81 and the inner guide ring 82 meet at point B; the blade outer ring groove 9 is located on the blade leading edge 61 side, and the blade inner ring groove 10 is located on the blade trailing edge 62 side, and the blade outer ring groove 9 and the blade inner ring groove 10 are both rectangular structures, wherein the outer guide ring structure 7 is located in the blade outer ring groove 9, and the inner guide ring structure 8 is located in the blade inner ring groove 10; the outer guide ring 1 71, the outer guide ring 2 72, the inner guide ring 1 81, and the inner guide ring 2 82 all extend along the flow direction; wherein the tangent angle of the adjacent edges of the outer guide ring 1 71 and the outer guide ring 2 72 at the intersection point A is 5°-8°, and the tangent angle of the adjacent edges of the inner guide ring 1 81 and the inner guide ring 2 82 at the intersection point B is 9°-12°.

[0008] Furthermore, the blade outer ring groove 9 has an axial length of L1 and a radial height of H1, wherein L1:H1=2-5.

[0009] Furthermore, the inner ring groove 10 of the blade has an axial length of L2 and a radial height of H2, wherein L2:H2=0.5-0.8.

[0010] Further, L1+L2=1.5(H1+H2).

[0011] Furthermore, the ratio of the radial height H1 to the impeller inlet radius is 0.1-0.3.

[0012] Furthermore, the ratio of the radial height H2 to the impeller outlet radius is 0.2-0.5.

[0013] Furthermore, the outer guide ring 1 71 , the outer guide ring 2 72 , the inner guide ring 1 81 , and the inner guide ring 2 82 all have an airfoil structure.

[0014] Furthermore, the windward surface of the outer guide ring 71 is a regular arc structure, and the leeward surface is an irregular arc structure; the windward surface of the inner guide ring 81 is a regular arc structure, and the leeward surface is an irregular arc structure.

[0015] Furthermore, the windward surfaces of the outer guide ring 71 and the inner guide ring 81 are spherical structures.

[0016] Furthermore, the spherical structure is a part of a sphere, and the ratio of the sphere radius to the impeller inlet radius is 0.08-0.2.

[0017] A diagonal flow fan of the present invention comprises an outer guide ring structure 7, an inner guide ring structure 8, a blade outer ring groove 9, and a blade inner ring groove 10; the outer guide ring structure 7 is composed of an outer guide ring 1 71 and an outer guide ring 2 72, and the adjacent edges of the outer guide ring 1 71 and the outer guide ring 2 72 intersect at point A; the inner guide ring structure 8 is composed of an inner guide ring 1 81 and an inner guide ring 2 82, and the adjacent edges of the inner guide ring 1 81 and the inner guide ring 2 82 intersect at point B; wherein the outer guide ring structure 7 is located in the blade outer ring groove 9, and the inner guide ring structure 8 is located in the blade inner ring groove 10; wherein the tangent angle of the adjacent edges of the outer guide ring 1 71 and the outer guide ring 2 72 at the intersection point A is 5°-8°, and the tangent angle of the adjacent edges of the inner guide ring 1 81 and the inner guide ring 2 82 at the intersection point B is 9°-12°. Due to the improvement of the structure of the diagonal flow fan, an outer guide ring structure, an inner guide ring structure, a blade outer ring groove, and a blade inner ring groove are set. At the same time, the above structure is optimized to improve the flow characteristics, reduce the impeller vibration, thereby improving the air outlet effect and efficiency, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a rear view of the diagonal flow fan 1;

[0019] Figure 2 It is a front view of the diagonal flow fan 1;

[0020] Figure 3 It is a cross-sectional view of the impeller of a diagonal flow fan;

[0021] Figure 4 This is a partial structural cross-sectional view of the impeller of a diagonal flow fan.

[0022] In the figure: diagonal flow fan 1, motor 2, impeller inner ring 3, impeller outer ring 4, impeller inner ring bracket 5, blade 6, blade leading edge 61, blade trailing edge 62, outer guide ring structure 7, outer guide ring 1 71, outer guide ring 2 72, inner guide ring structure 8, inner guide ring 1 81, inner guide ring 2 82, blade outer ring groove 9, blade inner ring groove 10, intersection A of adjacent edges of outer guide ring 1 71 and outer guide ring 2 72, intersection B of adjacent edges of inner guide ring 1 81 and inner guide ring 2 82. 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 1-4 As shown, a diagonal flow fan 1 includes a motor 2, an impeller inner ring 3, an impeller outer ring 4, an impeller inner ring bracket 5, and blades 6; wherein the blades 6 include a blade leading edge 61 and a blade trailing edge 62; and further include an outer guide ring structure 7, an inner guide ring structure 8, a blade outer ring groove 9, and a blade inner ring groove 10; wherein the outer guide ring structure 7 is formed on the inner wall of the blade leading edge 61 side of the impeller outer ring 4, and the inner guide ring structure 8 is formed on the outer wall of the blade trailing edge 62 side of the impeller inner ring 3, the outer guide ring structure 7 is composed of an outer guide ring 1 71 and an outer guide ring 2 72, and the adjacent edges of the outer guide ring 1 71 and the outer guide ring 2 72 intersect at point A, the inner guide ring structure 8 is composed of an inner guide ring 1 81 and an inner guide ring 2 82, and the inner guide ring The adjacent edges of the flow ring 1 81 and the inner guide ring 2 82 meet at point B; the blade outer ring groove 9 is located on the blade leading edge 61 side, and the blade inner ring groove 10 is located on the blade trailing edge 62 side, and the blade outer ring groove 9 and the blade inner ring groove 10 are both rectangular structures, wherein the outer guide ring structure 7 is located in the blade outer ring groove 9, and the inner guide ring structure 8 is located in the blade inner ring groove 10; the outer guide ring 1 71, the outer guide ring 2 72, the inner guide ring 1 81, and the inner guide ring 2 82 all extend along the flow direction; wherein the tangent angle of the adjacent edges of the outer guide ring 1 71 and the outer guide ring 2 72 at the intersection point A is 5°-8°, and the tangent angle of the adjacent edges of the inner guide ring 1 81 and the inner guide ring 2 82 at the intersection point B is 9°-12°.

[0026] Furthermore, the blade outer ring groove 9 has an axial length of L1 and a radial height of H1, wherein L1:H1=2-5.

[0027] Furthermore, the axial length of the blade inner ring groove 10 is L2, and the radial height is H2, wherein L2:H2=0.5-0.8.

[0028] Further, L1+L2=1.5(H1+H2).

[0029] Furthermore, the ratio of the radial height H1 to the impeller inlet radius is 0.1-0.3.

[0030] Furthermore, the ratio of the radial height H2 to the impeller outlet radius is 0.2-0.5.

[0031] Furthermore, the outer guide ring 1 71 , the outer guide ring 2 72 , the inner guide ring 1 81 , and the inner guide ring 2 82 all have an airfoil structure.

[0032] Furthermore, the windward surface of the outer guide ring 71 is a regular arc structure, and the leeward surface is an irregular arc structure; the windward surface of the inner guide ring 81 is a regular arc structure, and the leeward surface is an irregular arc structure.

[0033] Furthermore, the windward surfaces of the outer guide ring 71 and the inner guide ring 81 are spherical structures.

[0034] Furthermore, the spherical structure is a part of a sphere, and the ratio of the sphere radius to the impeller inlet radius is 0.08-0.2.

[0035] To sum up, due to the improvement of the structure of the diagonal flow fan, an outer guide ring structure, an inner guide ring structure, a blade outer ring groove, and a blade inner ring groove are set, and the above structure is optimized at the same time, which improves the flow characteristics, reduces the impeller vibration, and thus improves the air outlet effect and efficiency, and extends the service life.

Claims

1. A diagonal flow fan, comprising a motor (2), an impeller inner ring (3), an impeller outer ring (4), an impeller inner ring bracket (5), and blades (6); wherein the blades (6) comprise a blade leading edge (61) and a blade trailing edge (62); characterized in that: The invention also comprises an outer guide ring structure (7), an inner guide ring structure (8), a blade outer ring groove (9), and a blade inner ring groove (10); wherein the outer guide ring structure (7) is formed on the inner wall of the blade leading edge (61) side of the impeller outer ring (4), and the inner guide ring structure (8) is formed on the outer wall of the blade trailing edge (62) side of the impeller inner ring (3); the outer guide ring structure (7) is composed of an outer guide ring 1 (71) and an outer guide ring 2 (72), and the adjacent edges of the outer guide ring 1 (71) and the outer guide ring 2 (72) intersect at point A; the inner guide ring structure (8) is composed of an inner guide ring 1 (81) and an inner guide ring 2 (82), and the adjacent edges of the inner guide ring 1 (81) and the inner guide ring 2 (82) intersect at point B; the blade outer ring groove ( 9) is located on the leading edge (61) side of the blade, the inner ring groove (10) of the blade is located on the trailing edge (62) side of the blade, the outer ring groove (9) and the inner ring groove (10) of the blade are both rectangular structures, wherein the outer guide ring structure (7) is located in the outer ring groove (9) of the blade, and the inner guide ring structure (8) is located in the inner ring groove (10) of the blade; the outer guide ring 1 (71), the outer guide ring 2 (72), the inner guide ring 1 (81), and the inner guide ring 2 (82) all extend along the flow direction; wherein the tangent angle of the adjacent edges of the outer guide ring 1 (71) and the outer guide ring 2 (72) at the intersection point A is 5°-8°, and the tangent angle of the adjacent edges of the inner guide ring 1 (81) and the inner guide ring 2 (82) at the intersection point B is 9°-12°.

2. A diagonal flow fan as claimed in claim 1, characterized in that: The blade outer ring groove (9) has an axial length of L1 and a radial height of H1, wherein L1:H1=2-5.

3. A diagonal flow fan as claimed in claim 2, characterized in that: The inner ring groove (10) of the blade has an axial length of L2 and a radial height of H2, wherein L2:H2=0.5-0.

8.

4. A diagonal flow fan as claimed in claim 3, characterized in that: Where L1+L2=1.5(H1+H2).

5. A diagonal flow fan as claimed in claim 4, characterized in that: The ratio of radial height H1 to impeller inlet radius is 0.1-0.

3.

6. A diagonal flow fan as claimed in claim 5, characterized in that: The ratio of radial height H2 to impeller outlet radius is 0.2-0.

5.

7. The diagonal flow fan according to claim 1, characterized in that: The outer guide ring 1 (71), the outer guide ring 2 (72), the inner guide ring 1 (81), and the inner guide ring 2 (82) all have an airfoil structure.

8. The diagonal flow fan according to claim 7, characterized in that: The windward surface of the outer guide ring 1 (71) is a regular arc structure, and the leeward surface is an irregular arc structure. The windward surface of the inner guide ring 1 (81) is a regular arc structure, and the leeward surface is an irregular arc structure.

9. The diagonal flow fan according to claim 8, characterized in that: The windward surfaces of the outer guide ring 1 (71) and the inner guide ring 1 (81) are spherical structures.

10. The diagonal flow fan according to claim 9, characterized in that: The spherical structure is a part of the sphere, and the ratio of the sphere radius to the impeller inlet radius is 0.08-0.2.

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