Search

CN-224228946-U - Axial-flow wind wheel suction surface optimizing structure

CN224228946UCN 224228946 UCN224228946 UCN 224228946UCN-224228946-U

Abstract

The utility model discloses an optimized structure of a suction surface of an axial flow wind wheel, which belongs to the technical field of fluid machinery, wherein a first diversion trench is stopped at 0.35-0.45 of the outer diameter of the axial flow wind wheel from a hub, a second diversion trench is started at the stopping position of the first diversion trench, the second diversion trench is stopped at 0.6-0.75 of the outer diameter of the axial flow wind wheel, a third diversion trench is started at the stopping position of the second diversion trench, the third diversion trench is stopped at 0.9-0.95 of the outer diameter of the axial flow wind wheel, at least one layer of staggered feather-like aerodynamic profile is arranged on a pressure surface, a feather-like concave part and a scale structure can reduce 1-3dB of aerodynamic noise, the radial flow of the wind wheel is improved, the flow field optimization improves the fan efficiency, the working area of blades is increased, the resonance intensity and the light weight requirement of asymmetric hub design are considered at intervals, and the natural frequency of the feather-like concave part can effectively avoid the running frequency of a motor, so that the performance and the service life of the blades are effectively improved.

Inventors

  • JIANG XUEBIN
  • TAKEUCHI NOBUYUKI
  • XIANG JINBO

Assignees

  • 三菱重工海尔(青岛)空调机有限公司

Dates

Publication Date
20260512
Application Date
20250521

Claims (6)

  1. 1. An optimized structure of an axial flow wind wheel suction surface is characterized in that the axial flow wind wheel (1) consists of an axial flow wind wheel (1) and blades (5), and one side of each blade (5) is a pressure surface (2); The other side of the blade (5) is provided with a first diversion trench (6), a second diversion trench (7) and a third diversion trench (8) which are distributed from inside to outside in a gradient structure; the outside downward inclined surface of the blade (5) is a back pressure surface (3), and the blade (5) is distributed around the outer ring of the hub (4).
  2. 2. An optimized structure for the suction surface of an axial flow wind wheel according to claim 1, characterized in that the first diversion trench (6) is stopped at 0.35-0.45 of the outer diameter of the axial flow wind wheel (1) from the hub (4).
  3. 3. The optimized structure of the suction surface of the axial flow wind wheel according to claim 1, wherein the second diversion trench (7) starts from the stop position of the first diversion trench (6), and the second diversion trench (7) ends at 0.6-0.75 of the outer diameter of the axial flow wind wheel (1).
  4. 4. The optimized structure of the suction surface of the axial flow wind wheel according to claim 2, wherein the third diversion trench (8) starts from the stop position of the second diversion trench (7), and the third diversion trench (8) ends from 0.9 to 0.95 of the outer diameter of the axial flow wind wheel (1).
  5. 5. The optimized structure of the suction surface of the axial flow wind wheel according to claim 3, wherein the pressure surface (2) is provided with at least one layer of staggered feather-like aerodynamic shape.
  6. 6. The optimized structure of the suction surface of the axial flow wind wheel according to claim 2 is characterized in that the blades (5) on the axial flow wind wheel (1) are of an inclined structure.

Description

Axial-flow wind wheel suction surface optimizing structure Technical Field The utility model relates to an optimization structure of an axial flow wind wheel suction surface, and belongs to the technical field of fluid machinery. Background The multi-channel axial flow wind focusing impeller disclosed by the application number 201611237715.4 comprises at least two layers of axial flow channels which are arranged around the axis of the multi-channel axial flow wind focusing impeller in sequence, the spiral blades on the next layer of axial flow channels are N times of those of the previous layer of axial flow channels, any one spiral blade on the previous layer of axial flow channels corresponds to 2 spiral blades on the next layer of axial flow channels, the corresponding 2 spiral blades are distributed in a staggered mode, the front blade edge of one spiral blade and the front blade edge of the previous layer of corresponding spiral blade are positioned on the same arc line, the rear blade edge of the other spiral blade and the rear blade edge of the previous layer of corresponding spiral blade are positioned on the same arc line, the wind outlet surface is effectively increased, the heat dissipation area is large, the area of the blades of the next layer of axial flow channels is gradually reduced, the blade cutting blade lines are gradually increased, the front layer and the rear layer of the axial flow channels share the blade lines, the impeller rotating speed is high, the wind speed and the wind pressure are effectively increased, the wind interference of the adjacent axial flow channels is prevented, and the die stripping difficulty of the impeller is small. Similar to the above-mentioned application, there are currently disadvantages: 1. Broadband noise is formed after vortex shedding, and the broadband noise is remarkable particularly under a high-speed working condition; 2. The actual acting area of the blade is reduced due to air flow separation, and the energy utilization rate is reduced; 3. When the wind wheel and the motor run under the rated working condition, the natural frequencies are similar, so that the same-frequency resonance is easy to generate, and the service life cycle of the wind wheel is influenced. An axial flow wind wheel suction surface optimization structure is designed for the purpose to optimize the problems. Disclosure of utility model The utility model mainly aims to provide an optimized structure of an axial flow wind wheel suction surface. The aim of the utility model can be achieved by adopting the following technical scheme: The axial flow wind wheel is composed of an axial flow wind wheel and blades, and one side of each blade is a pressure surface; The other side of the blade is provided with a first diversion trench, a second diversion trench and a third diversion trench which are distributed in a gradient structure from inside to outside; the outside downward inclined surface of blade is the backpressure face, and the blade encircles the outer lane of distributing at wheel hub. Preferably, the first diversion trench is from 0.35-0.45 of the outer diameter of the axial flow wind wheel from the hub. Preferably, the second diversion trench starts from the stop position of the first diversion trench, and the second diversion trench ends from 0.6 to 0.75 of the outer diameter of the axial flow wind wheel. Preferably, the third diversion trench starts from the stopping position of the second diversion trench, and the third diversion trench ends from 0.9 to 0.95 of the outer diameter of the axial flow wind wheel. Preferably, the pressure surface is provided with at least one layer of staggered feather-like aerodynamic shape. Preferably, the blades on the axial flow wind wheel are of an inclined structure. The beneficial technical effects of the utility model are as follows: The utility model provides an optimized structure of an axial flow wind wheel suction surface, which consists of a hub 4 and two or more blades, wherein the blades are divided into a back pressure surface and a pressure surface from the forward direction, and mainly work is performed on the pressure surface, and the small radial flow is easy to generate due to the high flow speed of the back pressure surface The flow generates noise and reduces flow efficiency, the asymmetric aerodynamic shape of the multi-layer bird-like feather (such as the gap structure between the hooked edge of the main feather and the auxiliary feather) is added on the back pressure surface of the axial flow wind wheel to generate directional vortex, the airflow is guided to form ordered longitudinal vortex pairs (CVPs) through the structure of the edge of the feather, and CFD simulation shows that the vortex intensity is improved by more than 20%. Because the specific structures of three layers of back pressure surfaces and different gradients have different forms of strength, the blades of the existing axial flow wind wheel ar