Impeller with stability-expanding and noise-reducing structure and fan applying impeller

Abstract

According to the impeller with the stability expansion and noise reduction structure and the fan applying the impeller, the positive pressure face or the negative pressure face of each blade is provided with a first guide rib and a second guide rib, the first guide ribs are located on the radial outer side of the blades, the second guide ribs are located on the radial inner side of the blades, and the first guide ribs and the second guide ribs are both straight plate type guide ribs; on the positive pressure face or the negative pressure face of the blade, a flow channel A formed by the first guide rib and the second guide rib in the airflow flowing direction is a divergent flow channel. One end, far away from the positive pressure surface or the negative pressure surface of the blade, of each of the first guide rib and the second guide rib inclines towards the flow channel A to form a flow channel B from the position close to the positive pressure surface or the negative pressure surface to the position far away from the positive pressure surface or the negative pressure surface as a tapered flow channel; and the tail edge of each blade is provided with a zigzag structure. The impeller and the fan applying the impeller are improved, so that the problems of low adaptability, large flow loss, poor stability, high surge, high noise, low efficiency and the like are solved, and the working condition performance and the operation efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid machinery, and in particular to an impeller with a stabilization and noise reduction structure, and more particularly to a fan using the impeller. Background Art

[0002] Fans are usually used for ventilation, dust removal and cooling. They are small in size, simple in structure, good in ventilation effect and economical in performance, and are closely related to people's living environment. During operation, fans will form uneven pressure pulsations, thereby generating aerodynamic noise and vibration. The structural and layout design of the impeller blades can improve the dynamic characteristics after stalling, delay the occurrence of stalling, and significantly reduce turbulent interference broadband noise and instability. It can be seen that it is very necessary to optimize the design of the impeller.

[0003] Prior art CN2839671Y discloses a booster axial flow fan, including an impeller 1, impeller blades 2, and a motor 3. The impeller 1 is composed of 6 arc-shaped impeller blades 2 and a core-tube hub. The impeller blade root 10 is welded to the outer side of the core tube. Each impeller blade working surface is provided with two arc-shaped booster guide vanes 4. The guide direction of each booster guide vane is from the impeller blade leading edge 8 to the impeller blade trailing edge 9 and spans the impeller blade. The bottom of each booster guide vane 4 is connected to the side wall of the impeller blade working surface, one of the booster guide vanes 4 is arranged in the middle part of the impeller blade working surface, and the other booster guide vane 4 is arranged on the end side wall of the impeller blade top 11 (the end of the impeller blade working surface). Due to the effect of the boost guide vane 4, the airflow entering the working surface of the impeller blade cannot be directly discharged from the impeller blade. Due to the limitation of the arc-shaped boost guide vane 4, more energy transmitted by the impeller blade and the boost guide vane can be absorbed, so higher wind pressure and wind speed can be obtained. Due to the obstruction of the boost guide vane on the top edge of the impeller blade, the airflow entering the working surface of the impeller blade cannot radially overflow the impeller blade. Therefore, the airflow entering the working surface of the impeller blade can absorb energy more fully, thereby ensuring that the impeller has a higher boost efficiency.

[0004] However, the above-mentioned impeller structure has design limitations, and only involves the design of some non-universal impeller structures, and does not fundamentally change the impeller structure. It has weak adaptability, large flow loss, poor stability, high surge, high noise, and low efficiency. Therefore, in response to these problems, the applicant proposes an impeller with a stabilization and noise reduction structure and a fan using the same to solve the above-mentioned problems, reduce surge, noise and instability, and thereby improve operating performance and efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose an impeller with a stabilization and noise reduction structure and a fan using the same.

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

[0007] An impeller with a stabilizing and noise reducing structure comprises a hub, blades, and an impeller outer ring; the blades are evenly distributed along the circumference and installed between the hub and the impeller outer ring to form an impeller; the impeller is characterized in that: a first guide rib and a second guide rib are provided on the positive pressure surface or the negative pressure surface of the blade, the first guide rib is located on the radial outer side of the blade, the second guide rib is located on the radial inner side of the blade, and the first guide rib and the second guide rib are both straight plate-type guide ribs; on the positive pressure surface or the negative pressure surface of the blade, the flow channel A formed by the first guide rib and the second guide rib along the flow direction of the airflow is a gradually expanding flow channel; the first guide rib and the second guide rib are away from the blade One end of the positive pressure surface or negative pressure surface of the blade is inclined toward the flow channel A, forming a gradually contracting flow channel from the flow channel B close to the positive pressure surface or negative pressure surface to the flow channel far away from the positive pressure surface or negative pressure surface; the trailing edge of the blade is provided with a serrated structure; the inlet ends of the first guide rib and the second guide rib correspond to the leading edge of the blade, and the outlet ends of the first guide rib and the second guide rib correspond to the serrated structure of the trailing edge of the blade; the inlet radius of the impeller is R, the distance from the inlet end of the first guide rib to the central axis is R1, and the distance from the inlet end of the second guide rib to the central axis is R2, wherein R1>0.5R, R2<0.5R.

[0008] Further, the first guide rib and the second guide rib have different thicknesses in radial direction.

[0009] Furthermore, the thickness of the first guide rib in the radial direction is greater than the thickness of the second guide rib in the radial direction.

[0010] Furthermore, R1=(0.6-0.8)R.

[0011] Furthermore, R2=(0.35-0.45)R.

[0012] Furthermore, the width of the flow channel A in the inlet direction is L1, and the width in the outlet direction is W1, wherein 1.5L1<W1<3L1.

[0013] Furthermore, the width of the flow channel B away from the positive pressure surface or the negative pressure surface is L2, and the width of the flow channel B close to the positive pressure surface or the negative pressure surface is W2, wherein 1.2L2<W2<2.5L2.

[0014] Furthermore, W1>W2.

[0015] A fan comprises a motor consisting of a stator and a rotor, a collector, a guide cover, and a controller; the guide cover comprises annular ribs and guide ribs, and the annular ribs and guide ribs are arranged alternately to form a guide structure; the fan comprises an impeller with the stabilization and noise reduction structure.

[0016] Furthermore, the air deflector is an integral casting structure.

[0017] Furthermore, the collector outlet end is inserted into the impeller outer ring.

[0018] Furthermore, an auxiliary drainage channel is formed between the outer side wall of the collector and the inner side wall of the impeller outer ring.

[0019] The present invention discloses an impeller with a stabilization and noise reduction structure and a fan using the same, comprising a hub, blades, and an impeller outer ring; the blades are evenly distributed along the circumference and installed between the hub and the impeller outer ring to form an impeller; the characteristics are: a first guide rib and a second guide rib are provided on the positive pressure surface or the negative pressure surface of the blade, the first guide rib is located on the radial outer side of the blade, the second guide rib is located on the radial inner side of the blade, and the first guide rib and the second guide rib are both straight plate-type guide ribs; on the positive pressure surface or the negative pressure surface of the blade, the flow channel A formed by the first guide rib and the second guide rib along the flow direction of the airflow is a gradually expanding flow channel; the first guide rib and the second guide rib are provided on the positive pressure surface or the negative pressure surface of the blade. The ends of the guide ribs away from the positive pressure surface or negative pressure surface of the blade are inclined toward the flow channel A, forming a gradually contracting flow channel from the flow channel B close to the positive pressure surface or negative pressure surface to the flow channel away from the positive pressure surface or negative pressure surface; the trailing edge of the blade is provided with a sawtooth structure; the inlet ends of the first guide rib and the second guide rib correspond to the leading edge of the blade, and the outlet ends of the first guide rib and the second guide rib correspond to the sawtooth structure of the trailing edge of the blade; the inlet radius of the impeller is R, the distance from the inlet end of the first guide rib to the central axis is R1, and the distance from the inlet end of the second guide rib to the central axis is R2, wherein R1>0.5R, R2<0.5R. Due to the improvement of the impeller and the fan using it, the problems of poor adaptability, large flow loss, poor stability, high surge, high noise, low efficiency, etc. are solved, and the working performance and operation efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the axial cross-section structure of the fan;

[0021] Figure 2 It is a top view of the impeller structure;

[0022] Figure 3 Schematic diagram of the cross-sectional structure of flow channel A;

[0023] Figure 4 Schematic diagram of the cross-sectional structure of flow channel B.

[0024] In the figure: hub 1, blades 2, impeller outer ring 3, flow channel A, flow channel B, motor 4, stator 41, rotor 42, collector 5, guide cover 6, annular rib 61, guide rib 62, controller 7, first guide rib 81, second guide rib 82, impeller inlet radius R, distance R1 from the inlet end of the first guide rib 81 to the central axis, distance R2 from the inlet end of the second guide rib 82 to the central axis, width L1 of flow channel A in inlet direction, width W1 of flow channel A in outlet direction, width L2 of flow channel B away from the positive pressure surface or negative pressure surface, width W2 of flow channel B close to the positive pressure surface or negative pressure surface. DETAILED DESCRIPTION

[0025] 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.

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1-4 As shown, an impeller with a stabilization and noise reduction structure comprises a hub 1, blades 2, and an impeller outer ring 3; the blades 2 are evenly distributed along the circumference and installed between the hub 1 and the impeller outer ring 3 to form an impeller; it is characterized in that: the positive pressure surface or the negative pressure surface of the blade 2 is provided with a first guide rib 81 and a second guide rib 82, the first guide rib 81 is located on the radial outer side of the blade 2, and the second guide rib 82 is located on the radial inner side of the blade 2, and the first guide rib 81 and the second guide rib 82 are both straight plate-type guide ribs; on the positive pressure surface or the negative pressure surface of the blade, the flow channel A formed by the first guide rib 81 and the second guide rib 82 along the flow direction of the airflow is a gradually expanding flow channel; the first guide rib 81 and the second guide rib 82 are provided with a first guide rib 81 and a second guide rib 82. The ends of the two guide ribs 82 away from the positive pressure surface or negative pressure surface of the blade are inclined toward the flow channel A, forming a gradually contracting flow channel from the flow channel B close to the positive pressure surface or negative pressure surface to the flow channel away from the positive pressure surface or negative pressure surface; the trailing edge of the blade 2 is provided with a serrated structure; the inlet ends of the first guide rib 81 and the second guide rib 82 correspond to the leading edge of the blade 2, and the outlet ends of the first guide rib 81 and the second guide rib 82 correspond to the serrated structure of the trailing edge of the blade 2; the inlet radius of the impeller is R, the distance from the inlet end of the first guide rib 81 to the central axis is R1, and the distance from the inlet end of the second guide rib 82 to the central axis is R2, wherein R1>0.5R, R2<0.5R.

[0028] The shape and structure of the impeller significantly affect the aerodynamic efficiency of the air. The fluid enters the impeller through the variable diameter flow channel. The geometric characteristics of the impeller blades will cause the distribution of the relative velocity of the fluid, affect the distribution of the flow state, and ultimately affect the loss and efficiency caused by vibration noise. The impeller in this application is different from the conventional impeller in the prior art. After research, the applicant found that the quality of the impeller blade structure design directly affects the intensity of surge noise, etc. In response to the above problems, the applicant optimized the design of the impeller blade structure and adopted the first guide rib 81 and the second guide rib 82 formed by combining the guide rib with the gradually expanding or gradually contracting flow path structure. The above structure of the guide rib accelerates the movement of the fluid, reduces the retention time of the fluid in the blade, and reduces the impact of the occurrence of surge noise, etc. In addition, the structural design of the straight plate guide rib also makes the fluid more stable on the flow path, reduces the possibility of surge noise, etc. occurring in a certain place, and reduces the impact of surge noise, etc. In addition, the serrated structure of the trailing edge is more conducive to reducing vibration and maintaining the stability of the fan.

[0029] Furthermore, the first guide rib 81 and the second guide rib 82 have different thicknesses in the radial direction.

[0030] Furthermore, the thickness of the first guide rib 81 in the radial direction is greater than the thickness of the second guide rib 82 in the radial direction.

[0031] Considering that the surge noise on the radial outer side will be relatively larger, in order to reduce the adverse effects on the outer side, the applicant found that the radial thickness of the guide bar can also reduce the possibility of surge noise at a certain location to a certain extent.

[0032] Furthermore, R1=(0.6-0.8)R.

[0033] Furthermore, R2=(0.35-0.45)R.

[0034] Furthermore, the width of the flow channel A in the inlet direction is L1, and the width in the outlet direction is W1, wherein 1.5L1<W1<3L1.

[0035] Furthermore, the width of the flow channel B away from the positive pressure surface or the negative pressure surface is L2, and the width of the flow channel B close to the positive pressure surface or the negative pressure surface is W2, wherein 1.2L2<W2<2.5L2.

[0036] Furthermore, W1>W2.

[0037] The blade shape and flow channel structure play a vital role in improving the flow pattern. They can help reduce vibration and noise and stabilize the fluid flow pattern.

[0038] A fan, comprising a motor 4 consisting of a stator 41 and a rotor 42, a collector 5, a guide cover 6, and a controller 7; the guide cover 6 comprises an annular rib 61 and a guide rib 62, and the annular rib 61 and the guide rib 62 are arranged alternately to form a guide structure; the fan comprises an impeller with the expansion stabilization and noise reduction structure.

[0039] Furthermore, the air deflector 6 is an integral casting structure.

[0040] Furthermore, the outlet end of the collector 5 is inserted into the impeller outer ring 3 .

[0041] Furthermore, an auxiliary drainage channel is formed between the outer wall of the collector 5 and the inner wall of the impeller outer ring 3 .

[0042] The air guide cover 6 composed of the annular ribs 61 and the air guide ribs 62 plays a significant role in air guide and efficiency enhancement, and also greatly reduces noise and increases stability.

[0043] The present invention discloses an impeller with a stabilization and noise reduction structure and a fan using the same, comprising a hub, blades, and an impeller outer ring; the blades are evenly distributed along the circumference and installed between the hub and the impeller outer ring to form an impeller; the characteristics are: a first guide rib and a second guide rib are provided on the positive pressure surface or the negative pressure surface of the blade, the first guide rib is located on the radial outer side of the blade, the second guide rib is located on the radial inner side of the blade, and the first guide rib and the second guide rib are both straight plate-type guide ribs; on the positive pressure surface or the negative pressure surface of the blade, the flow channel A formed by the first guide rib and the second guide rib along the flow direction of the airflow is a gradually expanding flow channel; the first guide rib and the second guide rib are provided on the positive pressure surface or the negative pressure surface of the blade. The ends of the guide ribs away from the positive pressure surface or negative pressure surface of the blade are inclined toward the flow channel A, forming a gradually contracting flow channel from the flow channel B close to the positive pressure surface or negative pressure surface to the flow channel away from the positive pressure surface or negative pressure surface; the trailing edge of the blade is provided with a sawtooth structure; the inlet ends of the first guide rib and the second guide rib correspond to the leading edge of the blade, and the outlet ends of the first guide rib and the second guide rib correspond to the sawtooth structure of the trailing edge of the blade; the inlet radius of the impeller is R, the distance from the inlet end of the first guide rib to the central axis is R1, and the distance from the inlet end of the second guide rib to the central axis is R2, wherein R1>0.5R, R2<0.5R. Due to the improvement of the impeller and the fan using it, the problems of poor adaptability, large flow loss, poor stability, high surge, high noise, low efficiency, etc. are solved, and the working performance and operation efficiency are improved.

Claims

1. An impeller with a stabilization and noise reduction structure, comprising a hub (1), blades (2), and an impeller outer ring (3); the blades (2) are evenly distributed along the circumference and installed between the hub (1) and the impeller outer ring (3) to form an impeller; characterized in that: The positive pressure surface or negative pressure surface of the blade (2) is provided with a first guide rib (81) and a second guide rib (82), the first guide rib (81) is located on the radial outer side of the blade (2), and the second guide rib (82) is located on the radial inner side of the blade (2), and the first guide rib (81) and the second guide rib (82) are both straight plate-type guide ribs; on the positive pressure surface or negative pressure surface of the blade, the flow channel A formed by the first guide rib (81) and the second guide rib (82) along the flow direction of the airflow is a gradually expanding flow channel; the ends of the first guide rib (81) and the second guide rib (82) away from the positive pressure surface or negative pressure surface of the blade are both inclined toward the flow channel A, forming a channel formed by the first guide rib (81) and the second guide rib (82) close to the positive pressure surface or negative pressure surface of the blade. The flow channel B from the positive pressure surface or the negative pressure surface to the positive pressure surface or the negative pressure surface is a gradually contracting flow channel; the trailing edge of the blade (2) is provided with a sawtooth structure; the inlet ends of the first guide rib (81) and the second guide rib (82) both correspond to the leading edge of the blade (2), and the outlet ends of the first guide rib (81) and the second guide rib (82) both correspond to the sawtooth structure of the trailing edge of the blade (2); the inlet radius of the impeller is R, the distance from the inlet end of the first guide rib (81) to the central axis is R1, and the distance from the inlet end of the second guide rib (82) to the central axis is R2, wherein R1>0.5R, and R2<0.5R.

2. The impeller with a stabilization and noise reduction structure according to claim 1, characterized in that: The first guide rib (81) and the second guide rib (82) have different thicknesses in the radial direction.

3. The impeller with a stabilization and noise reduction structure according to claim 2, characterized in that: The thickness of the first guide rib (81) in the radial direction is greater than the thickness of the second guide rib (82) in the radial direction.

4. The impeller with a stabilization and noise reduction structure according to claim 1, characterized in that: R1=(0.6~0.8)R.

5. The impeller with a stabilization and noise reduction structure according to claim 1, characterized in that: R2=(0.35~0.45)R.

6. The impeller with a stabilization and noise reduction structure according to claim 1, characterized in that: The width of flow channel A in the inlet direction is L1, and the width in the outlet direction is W1, wherein 1.5L1<W1<3L1.

7. The impeller with a stabilization and noise reduction structure according to claim 6, characterized in that: The width of the flow channel B away from the positive pressure surface or the negative pressure surface is L2, and the width close to the positive pressure surface or the negative pressure surface is W2, wherein 1.2L2<W2<2.5L2.

8. The impeller with a stabilization and noise reduction structure according to claim 7, characterized in that: W1>W2.

9. A fan, characterized in that: The fan comprises a motor (4) consisting of a stator (41) and a rotor (42), a collector (5), a guide cover (6), and a controller (7); the guide cover (6) comprises annular ribs (61) and guide ribs (62), and the annular ribs (61) and the guide ribs (62) are arranged alternately to form a guide structure; the fan comprises an impeller with a stabilization and noise reduction structure as described in any one of claims 1 to 8.

10. A fan according to claim 9, characterized in that: The air deflector (6) is an integral casting structure.

11. A fan according to claim 9, characterized in that: The outlet end of the collector (5) is inserted into the impeller outer ring (3).

12. A fan according to claim 11, characterized in that: An auxiliary drainage channel is formed between the outer wall of the collector (5) and the inner wall of the impeller outer ring (3).

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