Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An axial-flow windwheel

An axial-flow wind and hub technology, which is applied to the components of pumping devices for elastic fluids, non-variable-capacity pumps, machines/engines, etc. Take away the heat of the outdoor unit, without considering the reduction of boundary layer separation, etc., to achieve the effects of low rotor weight and rotor manufacturing cost, reduced wake strength, low noise and motor load

Inactive Publication Date: 2009-03-04
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the air volume is sensitive to the change of load, the air volume of the conventional 2-blade axial-flow wind wheel is about 30% lower than that of the conventional 3-blade or 4-blade wind wheel, which is not conducive to quickly taking away the heat of the outdoor unit; if the ordinary 3-blade or 4-blade is used Although the axial flow fan can well solve the problem of insufficient flow rate and static pressure rise of the two-bladed axial flow wind wheel, the increase in the number of blades will lead to an increase in its own weight, an increase in the motor load, and the cost of the wind wheel will also increase. The increase of weight increases by more than 30% to 50%
[0004] In addition, in a conventional axial-flow wind turbine, on two or more blades integrally formed around the hub (hub), the corner formed by the rear edge of the blade and the outer edge end of the blade forms a flat surface in the downstream direction of the airflow. No consideration is given to suppressing noise and improving flow by reducing boundary layer separation and reducing rotor wake, nor is it considered to reduce noise, nor is it considered by improving the blade trailing edge, blade middle and top regions. Treatment to reduce rotor weight and motor load

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An axial-flow windwheel
  • An axial-flow windwheel
  • An axial-flow windwheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

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

[0025] In the figure, 1 is the axial flow rotor, 2 is the hub, 3 is the blade, 3a is the downstream side edge of the airflow, 3b is the concave part, D1 is the hub diameter, D2 is the outer diameter of the axial flow rotor, D3 is the blade The diameter of the circumference where the starting position A of the trailing edge depression is located, D4 is the circumference diameter of the position B where the blade trailing edge depression ends, Rm is the height of the blade, H1 is the maximum height of the depression part calculated from the lowest position C of the trailing edge of the blade 3, H2 is the height of the rotor blade calculated from the lowest position C of the trailing edge of the blade 3, δ is the depth of the depression, L is the length of the chord line of the blade, f is the point of the trailing edge of the blade top, k is the connecting...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An axial-flow wind wheel comprises three blades set on a hub, wherein, the end area of the blades is dishing toward to the costal air-in direction; the three blades use the rotary central axis of the wind wheel as center each other and they allocate equal-spaced or unequal-spaced in the 120degree+-15degree. The external diameter of the axial-flow is defined as D2, the hub diameter is defined as D1, the height of the blade Rm is defined as (D2-D1) / 2, the circumference diameter in which there is the beginning dishing place A is defined as D3, (D3-D1) / 2=(0.10-0.47)Rm. Since the high-middle part of the trailing edge change the distribution of pressure of the blades before the blade root part, the high pressure draught compartment of the blades flow direction low pressure surface advanced to make local pressure ascending, to reduce boundary layer separating, to make the boundary layer turn into turbulent flow before getting the front of the blade end, to reduce convolution noise and rotor wake, thereby having low noise and big air quantity.

Description

technical field [0001] The invention relates to an axial-flow wind wheel, in particular to a three-leaf axial-flow wind wheel suitable for an outdoor unit of an air conditioner. Background technique [0002] Axial flow fans are mostly used in outdoor units of air conditioners. In the previous axial flow fan, the rear edge in contact with the downstream side of the airflow (hereinafter, the rear edge of the blade in contact with the downstream side of the airflow is referred to as "blade trailing edge") protruded or flattened toward the downstream direction of the airflow outlet. Align to form 2 to 4 leaves. [0003] In the conventional axial flow wind wheel with two blades, the single blade load is heavy, and each blade works under high load, the flow rate and static pressure are relatively low, the wind noise is high, and the motor is required to have a higher speed. The requirements for the strength and the load characteristics of the motor of the 2-blade axial flow wind...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/38
Inventor 游斌伍光辉程志明向运明
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products