Centrifugal pressurizing propeller structure

Abstract

A centrifugal pressurizing blade wheel structure with low noise is composed of a main body with conic-arc shape and a central axle hole, and multiple groups of multiple blades with regularly periodicvariation of unequal gaps between adjacent blades. All the blades in a group have different angles.

Description

technical field [0001] The present invention relates to a centrifugal pressurized impeller structure, in particular to a low-noise centrifugal pressurized impeller structure used in a centrifugal rotary pressurized mechanical device. Background technique [0002] For existing centrifugal rotary pressurized mechanical devices such as centrifugal compressors or centrifugal fans, it uses the high-speed rotation of the centrifugal impeller structure of the mechanical device to absorb the fluid (such as refrigerant, air, water, etc.) ) work to achieve the function of pressurizing and transporting fluid, and then obtain the required pressure and discharge flow, and exert the designed effect. [0003] figure 1 It is the usual structure of the existing centrifugal rotary pressurized mechanical device. The pressurized mechanical device 1 includes a fluid suction port 11, a centrifugal impeller 12, a diffuser assembly 13 (Diffuser), a volute 14 (Volute Casing) and an impeller shaft ...

AI Technical Summary

Problems solved by technology

For example, by changing the flow force design of the flow force components, better flow field design and unit efficiency can be obtained, and the generation of broadband noise can be reduced; this method has many difficulties in actual design, because it requires a wide range of operation and regulation. For mechanical devices, it is not easy to obtain a combination of parameters for wide-area and high-efficiency operation, which forms a design bottleneck

[0007] There are also other methods to reduce discrete monotonic noise, such as Figure 4 The U.S. Patent No. 3,635,579 shown in the case is to add a soundproof casing 20 outside the turbine casing to reduce the noise of the impeller of the centrifugal rotary pressurization mechanism. This method has complex structure and high cost. disadvantages, it is difficult to promote on a large scale

[0008] like Figure 5 Shown U.S. Patent No. 4,411,592 case, it is to additionally arrange a porous sound-absorbing material 25 (Absorber Materiel) on the straight wall flow channel of impeller outlet and diffuser, reach the effect of reducing noise, or as U.S. Patent No. Case No. 4,504,188 and Case No. 5,249,919 also have similar designs; although this type of design can reduce fluid noise, it increases flow channel impedance and reduces operating efficiency, and it is difficult to solve practical problems

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