A diagonal flow fan with a pressure stabilizing chamber

Abstract

A diagonal flow fan with a pressure stabilizing chamber, the pressure stabilizing chamber includes a positive pressure stabilizing structure and a negative pressure stabilizing structure, the positive pressure stabilizing structure is located on and protrudes from the positive pressure surface of the blade, and the negative pressure stabilizing structure is located on and protrudes from the negative pressure surface of the blade; the positive pressure stabilizing structure is formed on the positive pressure surface of the blade using rigid materials, and the surface of the positive pressure stabilizing structure is a smooth surface, and the negative pressure stabilizing structure is formed on the negative pressure surface of the blade using flexible materials, and the surface of the negative pressure stabilizing structure is a rough surface; both the positive pressure stabilizing structure and the negative pressure stabilizing structure are arc structures, and their radii are R1 and R2 respectively, R1>R2; the pressure stabilizing chamber is located closer to the blade root in the radial direction; the pressure stabilizing chamber is located closer to the trailing edge of the blade in the axial direction. The fan structure improves the flow characteristics, reduces the vibration of the impeller, thereby improving the air outlet effect and efficiency, and extending the service life.

Description

Technical Field

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

[0002] Diagonal flow fans are fluid machines that have multiple rotating blades arranged radially with the hub as the center, and blow air in multiple directions to the rotating blades while being rotated by a motor, etc., in order to promote heat dissipation in air-cooled heat exchangers such as electric fans or ventilation fans, or radiators or condensers of automobiles. 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 the characteristics of diagonal flow fans.

[0003] The prior art CN1981134A discloses a fan, in which a buffer groove is opened on the inner surface of the frame along the rotating circumference of the fan blade. When the fan blade rotates at high speed, the air disturbed by the rotation of the fan blade will form a stable high-speed airflow in the buffer groove. The air flow will reduce the air pressure in the space between the fan blade and the frame, so that when a traditional axial flow fan is running, the air disturbance in this part is sucked into the airflow. At the same time, since the direction of the high-speed airflow is the same as the rotation direction of the fan blade, a lubricating layer is formed between the fan blade and the frame, which effectively reduces the resistance of the fan blade and increases the rotation speed of the fan blade.

[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 with a pressure stabilizing chamber.

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

[0007] A diagonal flow fan with a pressure stabilizing chamber comprises a blade 2, wherein the blade 2 has a blade tip 3, a blade root 4, a blade positive pressure surface 5, a blade negative pressure surface 6, a pressure stabilizing chamber 7, a blade leading edge 8, and a blade trailing edge 9; the pressure stabilizing chamber 7 comprises a positive pressure stabilizing structure 71 and a negative pressure stabilizing structure 72, the positive pressure stabilizing structure 71 is located at and protrudes from the blade positive pressure surface 5, and the negative pressure stabilizing structure 72 is located at and protrudes from the blade negative pressure surface 6; the positive pressure stabilizing structure 71 is formed on the blade positive pressure surface 5 with a rigid material, and the surface of the positive pressure stabilizing structure 71 is a smooth surface, and the negative pressure stabilizing structure 72 is formed on the blade negative pressure surface 6 with a flexible material, and the surface of the negative pressure stabilizing structure 72 is a rough surface; both the positive pressure stabilizing structure 71 and the negative pressure stabilizing structure 72 are arc structures, and their radii are R1 and R2 respectively, R1>R2; the pressure stabilizing chamber 7 is located closer to the blade root 4 in the radial direction; the pressure stabilizing chamber 7 is located closer to the blade trailing edge 9 in the axial direction.

[0008] Furthermore, the positive pressure stabilizing structure 71 is made of high-strength aluminum alloy material, and the negative pressure stabilizing structure 72 is made of polystyrene material.

[0009] Furthermore, the radius of the blade is R, R1 = (0.3-0.5)R, R2 = (0.1-0.2)R.

[0010] Furthermore, the distance between the tip side of the positive pressure stabilizing structure 71 and the blade tip 3 is L1, and the distance between the root side of the positive pressure stabilizing structure 71 and the blade root 4 is L2, wherein L2: L1 = 0.3-0.6.

[0011] Furthermore, the distance between the tip side of the negative pressure stabilizing structure 72 and the blade tip 3 is L3, and the distance between the root side of the negative pressure stabilizing structure 72 and the blade root 4 is L4, wherein L4:L3=0.2-0.5.

[0012] Furthermore, L1 <L3,L2<L4。

[0013] Further, L1:L3=0.8-0.9, L2:L4=0.6-0.7.

[0014] Furthermore, the axial length of the pressure stabilizing chamber 7 is A, and the axial length of the blade 2 is B, wherein A:B=0.8-0.95.

[0015] Furthermore, the distance between the leading edge side of the blade of the pressure stabilizing chamber 7 and the leading edge 8 of the blade is D, and the distance between the trailing edge side of the blade of the pressure stabilizing chamber 7 and the trailing edge 9 of the blade is C, wherein C:D=0.35-0.65.

[0016] Further, A:B=0.9, C:D=0.5.

[0017] A diagonal flow fan with a pressure stabilizing chamber of the present invention comprises a blade 2, wherein the blade 2 has a blade tip 3, a blade root 4, a blade positive pressure surface 5, a blade negative pressure surface 6, a pressure stabilizing chamber 7, a blade leading edge 8, and a blade trailing edge 9; the pressure stabilizing chamber 7 comprises a positive pressure stabilizing structure 71 and a negative pressure stabilizing structure 72, the positive pressure stabilizing structure 71 is located at and protrudes from the blade positive pressure surface 5, and the negative pressure stabilizing structure 72 is located at and protrudes from the blade negative pressure surface 6; the positive pressure stabilizing structure 71 is formed on the blade positive pressure surface 5 with a rigid material, and the surface of the positive pressure stabilizing structure 71 is a smooth surface, and the negative pressure stabilizing structure 72 is formed on the blade negative pressure surface 6 with a flexible material, and the surface of the negative pressure stabilizing structure 72 is a rough surface; both the positive pressure stabilizing structure 71 and the negative pressure stabilizing structure 72 are arc structures, and their radii are R1 and R2 respectively, R1>R2; the pressure stabilizing chamber 7 is located closer to the blade root 4 in the radial direction; the pressure stabilizing chamber 7 is located closer to the blade trailing edge 9 in the axial direction. Since the structure of the diagonal flow fan is improved and structures such as the pressure stabilizing chamber 7 are provided, the flow characteristics are improved, the vibration of the impeller is reduced, and the air outlet effect and efficiency are improved, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is an oblique view of the diagonal flow fan 1;

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

[0021] Figure 4 This is a schematic diagram of the axial section of the diagonal flow fan blade.

[0022] In the figure: diagonal flow fan 1, blade 2, blade tip 3, blade root 4, blade positive pressure surface 5, blade negative pressure surface 6, pressure stabilizing chamber 7, positive pressure stabilizing structure 71, negative pressure stabilizing structure 72, blade leading edge 8, blade trailing edge 9, blade radius R, radius R1 of positive pressure stabilizing structure 71, radius R2 of negative pressure stabilizing structure 72, distance L1 from the tip side of the positive pressure stabilizing structure 71 to the blade tip 3, distance L2 from the root side of the positive pressure stabilizing structure 71 to the blade root 4, distance L3 from the tip side of the negative pressure stabilizing structure 72 to the blade tip 3, distance L4 from the root side of the negative pressure stabilizing structure 72 to the blade root 4, axial length A of the pressure stabilizing chamber 7, axial length B of the blade 2, distance D from the leading edge side of the pressure stabilizing chamber 7 to the leading edge 8 of the blade, distance C from the trailing edge side of the pressure stabilizing chamber 7 to the trailing edge 9 of the blade. 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 with a pressure stabilizing chamber comprises a blade 2, wherein the blade 2 has a blade tip 3, a blade root 4, a blade positive pressure surface 5, a blade negative pressure surface 6, a pressure stabilizing chamber 7, a blade leading edge 8, and a blade trailing edge 9; the pressure stabilizing chamber 7 comprises a positive pressure stabilizing structure 71 and a negative pressure stabilizing structure 72, the positive pressure stabilizing structure 71 is located at and protrudes from the blade positive pressure surface 5, and the negative pressure stabilizing structure 72 is located at and protrudes from the blade negative pressure surface 6; the positive pressure stabilizing structure 71 is formed on the blade positive pressure surface 5 with a rigid material, and the surface of the positive pressure stabilizing structure 71 is a smooth surface, and the negative pressure stabilizing structure 72 is formed on the blade negative pressure surface 6 with a flexible material, and the surface of the negative pressure stabilizing structure 72 is a rough surface; both the positive pressure stabilizing structure 71 and the negative pressure stabilizing structure 72 are arc structures, and their radii are R1 and R2 respectively, R1>R2; the pressure stabilizing chamber 7 is located closer to the blade root 4 in the radial direction; the pressure stabilizing chamber 7 is located closer to the blade trailing edge 9 in the axial direction.

[0026] Furthermore, the positive pressure stabilizing structure 71 is made of high-strength aluminum alloy material, and the negative pressure stabilizing structure 72 is made of polystyrene material.

[0027] Furthermore, the radius of the blade is R, R1 = (0.3-0.5)R, R2 = (0.1-0.2)R.

[0028] Furthermore, the distance between the tip side of the positive pressure stabilizing structure 71 and the blade tip 3 is L1, and the distance between the root side of the positive pressure stabilizing structure 71 and the blade root 4 is L2, wherein L2: L1 = 0.3-0.6.

[0029] Furthermore, the distance between the tip side of the negative pressure stabilizing structure 72 and the blade tip 3 is L3, and the distance between the root side of the negative pressure stabilizing structure 72 and the blade root 4 is L4, wherein L4:L3=0.2-0.5.

[0030] Furthermore, L1 <L3,L2<L4。

[0031] Further, L1:L3=0.8-0.9, L2:L4=0.6-0.7.

[0032] Furthermore, the axial length of the pressure stabilizing chamber 7 is A, and the axial length of the blade 2 is B, wherein A:B=0.8-0.95.

[0033] Furthermore, the distance between the leading edge side of the blade of the pressure stabilizing chamber 7 and the leading edge 8 of the blade is D, and the distance between the trailing edge side of the blade of the pressure stabilizing chamber 7 and the trailing edge 9 of the blade is C, wherein C:D=0.35-0.65.

[0034] Further, A:B=0.9, C:D=0.5.

[0035] In summary, due to the improvement of the structure of the diagonal flow fan, a blade 2 is provided, wherein the blade 2 has a blade tip 3, a blade root 4, a blade positive pressure surface 5, a blade negative pressure surface 6, a pressure stabilizing chamber 7, a blade leading edge 8, and a blade trailing edge 9; the pressure stabilizing chamber 7 includes a positive pressure stabilizing structure 71 and a negative pressure stabilizing structure 72, the positive pressure stabilizing structure 71 is located on and protrudes from the blade positive pressure surface 5, and the negative pressure stabilizing structure 72 is located on and protrudes from the blade negative pressure surface 6; the positive pressure stabilizing structure 71 is formed on the blade positive pressure surface 5 with a rigid material, and the positive pressure stabilizing structure The surface of the negative pressure stabilizing structure 71 is a smooth surface, the negative pressure stabilizing structure 72 is formed on the negative pressure surface 6 of the blade with a flexible material, and the surface of the negative pressure stabilizing structure 72 is a rough surface; the positive pressure stabilizing structure 71 and the negative pressure stabilizing structure 72 are both arc structures, and their radii are R1 and R2 respectively, R1>R2; the pressure stabilizing cavity 7 is located closer to the blade root 4 in the radial direction; the pressure stabilizing cavity 7 is located closer to the blade trailing edge 9 in the axial direction, which improves the flow characteristics, reduces the impeller vibration, thereby improving the wind output effect and efficiency, and extending the service life.

Claims

1. A diagonal flow fan with a pressure stabilizing chamber, comprising a blade (2), wherein the blade (2) has a blade tip (3), a blade root (4), a blade positive pressure surface (5), a blade negative pressure surface (6), a pressure stabilizing chamber (7), a blade leading edge (8), and a blade trailing edge (9); characterized in that: The pressure stabilizing chamber (7) comprises a positive pressure stabilizing structure (71) and a negative pressure stabilizing structure (72); the positive pressure stabilizing structure (71) is located on and protrudes from the positive pressure surface (5) of the blade, and the negative pressure stabilizing structure (72) is located on and protrudes from the negative pressure surface (6) of the blade; the positive pressure stabilizing structure (71) is formed on the positive pressure surface (5) of the blade using a rigid material, and the surface of the positive pressure stabilizing structure (71) is a smooth surface; the negative pressure stabilizing structure (72) is formed on the negative pressure surface (6) of the blade using a flexible material, and the surface of the negative pressure stabilizing structure (72) is a rough surface; both the positive pressure stabilizing structure (71) and the negative pressure stabilizing structure (72) are arc structures, and their radii are R1 and R2 respectively, and R1>R2; the pressure stabilizing chamber (7) is located closer to the blade root (4) in the radial direction; and the pressure stabilizing chamber (7) is located closer to the trailing edge (9) of the blade in the axial direction.

2. A diagonal flow fan with a pressure stabilizing chamber as claimed in claim 1, characterized in that: The positive pressure stabilizing structure (71) is made of high-strength aluminum alloy material, and the negative pressure stabilizing structure (72) is made of polystyrene material.

3. The diagonal flow fan with a pressure stabilizing chamber according to claim 1, characterized in that: The radius of the blade is R, R1 = (0.3-0.5)R, R2 = (0.1-0.2)R.

4. The diagonal flow fan with a pressure stabilizing chamber according to claim 1, characterized in that: The distance between the blade tip side of the positive pressure stabilizing structure (71) and the blade tip (3) is L1, and the distance between the blade root side of the positive pressure stabilizing structure (71) and the blade root (4) is L2, wherein L2: L1＝0.3-0.6。 5. A diagonal flow fan with a pressure stabilizing chamber as claimed in claim 4, characterized in that: The distance between the tip side of the negative pressure stabilizing structure (72) and the blade tip (3) is L3, and the distance between the root side of the negative pressure stabilizing structure (72) and the blade root (4) is L4, wherein L4:L3=0.2-0.

5.

6. A diagonal flow fan with a pressure stabilizing chamber as claimed in claim 5, characterized in that: Among them L1 <L3,L2<L4。 7. A diagonal flow fan with a pressure stabilizing chamber as claimed in claim 6, characterized in that: Among them, L1:L3=0.8-0.9, L2:L4=0.6-0.

7.

8. The diagonal flow fan with a pressure stabilizing chamber according to claim 1, characterized in that: The axial length of the pressure stabilizing chamber (7) is A, and the axial length of the blade (2) is B, wherein A:B=0.8-0.

95.

9. A diagonal flow fan with a pressure stabilizing chamber as claimed in claim 8, characterized in that: The distance between the leading edge side of the blade of the pressure stabilizing chamber (7) and the leading edge (8) of the blade is D, and the distance between the trailing edge side of the blade of the pressure stabilizing chamber (7) and the trailing edge (9) of the blade is C, wherein C:D=0.35-0.

65.

10. The diagonal flow fan with a pressure stabilizing chamber according to claim 9, characterized in that: Among them, A:B=0.9, C:D=0.5.

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