Axial flow type fluid driving device

Abstract

The invention belongs to the field of fluid machines and relates to an axial flow type fluid driving device. The axial flow type fluid driving device comprises a hub, fan blades and a fairing which rotate together, wherein the fan blades are of radial fan blade structures and are arranged between the hub and the fairing. The axial flow type fluid driving device is characterized in that suspension blades are arranged on the axial flow type fluid driving device; the inner end of the suspension blades are of a cantilever structure; and the outer end of the suspension blades are in fastening connection with the fairing or are integrally formed with the fairing. Due to the adoption of the suspension blade structure, at least part of fan blades and the hub are not connected to yield part of axial inlet channel area, further the passing flow of a working medium can be increased and the conveying efficiency of the device is increased. The weight and the rotary inertia are reduced, so that the possibility of fatigue damage of a driving shaft of the device is reduced; the lengths of the blades are inconsistent, so that the action rules of the blades for the working medium or the action rules of the working medium for the blades are inconsistent, the noises can be reduced by suppressing the resonance phenomenon and the work reliability of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, and relates to a fluid drive device, in particular to an axial flow fluid drive device, and more specifically to a vane structure and layout of an axial flow fan and an axial flow vane pump . Background technique [0002] Axial-flow fluid drive devices include axial-flow fans and axial-flow vane pumps, etc., which belong to typical fluid machinery. The function of the axial-flow fluid drive device is to drive the fluid working medium through the rotation of the fan blades, so as to generate a flow mainly along the axial direction of the drive shaft. The working medium conveyed by the axial flow fan is generally a gaseous fluid, while the working medium conveyed by the axial flow vane pump is generally a liquid fluid. Whether it is an axial flow fan or an axial flow vane pump, the working fluid they transport is not only a single type of substance and a single fluid state, but also often...

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Problems solved by technology

However, the above-mentioned integrated axial flow drive device has obvious defects, which are mainly reflected in three aspects: 1) Due to the scheme that the root of each blade is connected to the hub, the cross section of the axial inlet passage near the hub is affected by the blade It is too dense and blocked, which hinders the passage of more fluids, or reduces the delivery efficiency of the device. This shortcoming is particularly prominent in small axial flow fans and axial flow vane pumps; 2) due to The root of each blade is connected to the hub, resulting in a larger overall mass of the device, especially a larger moment of inertia of the entire device, and a larger moment of inertia of the device under the same operating conditions, resulting in an increase in the size of the device. The burden on the drive shaft, which is very easy to cause fatigue fracture of the drive shaft for some fans or pumps that frequently start-run-stop and other intermittent cycles; 3) Since the root of each blade is connected to the hub The scheme makes the structural elements of each blade such as size, shape and layout roughly the same or similar, so that the law of their action on the working fluid or the law of the action of the working fluid on the blade is very similar, resulting in the occurrence of resonance. , will not only produce a large operating noise, but also endanger the working reliability of the device

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