Air inlet prerotator

Abstract

The invention discloses an air inlet prerotator. The air inlet prerotator comprises fixed outer rings, fixed inner rings, a plurality of connecting rods, guide vanes, rotating rings and driving mechanisms, wherein the fixed outer rings and the fixed inner rings are arranged coaxially, the connecting rods are used for connecting the fixed outer rings with the fixed inner rings, the two ends of the guide vanes are arranged on the fixed outer rings and the fixed inner rings in a rotating mode respectively, the peripheral parts of the outer sides of the fixed outer rings are sleeved with the rotating rings respectively, and the driving mechanisms are used for driving the guide vanes to rotate. According to the air inlet prerotator, the guide vanes have high stiffness and do not deform when impacted by major air flow, therefore, the opening of vane bodies on the guide vanes is easier to adjust, the vane bodies are higher in adjustment accuracy, and the flow regulation of the air inlet prerotator is more accurate; in this way, the consistency between flow and a design value of the vane bodies on the guide vanes with the practical opening is ensured, accurate data can be provided for a control system, energy loss at the time of flow regulation in the prior art is avoided, and the work efficiency of a fan provided with the air inlet prerotator will be improved greatly.

Description

[0001] technical field [0002] The invention relates to an intake prerotator. [0003] Background technique [0004] With the rapid development of the national economy, the application of blowers and compressors is becoming more and more extensive. In order to make the blower and compressor meet the design concept of high efficiency and energy saving under variable working conditions, they must be adjusted reasonably. At present, the double-suction fan with large flow is usually adjusted by a hydraulic coupling, or by installing an adjustment door in front of the air inlet, which will cause a large energy loss. [0005] In addition, in the prior art, most of the air intake pre-swirl devices used as regulating doors are integrated devices, and the regulating blades are basically single-supported, resulting in poor rigidity and easy deformation when the airflow impacts, resulting in pre-swirling The opening of the regulating blade of the device cannot be zero when it is cl...

AI Technical Summary

Problems solved by technology

At present, the double-suction fan with large flow rate is usually adjusted by a hydraulic coupling, or by installing an adjustment door in front of its air inlet, which will cause a large energy loss

[0005]In addition, in the prior art, most of the air intake pre-rotation devices used as regulating doors are integrated devices, and the regulating blades are basically single-supported, resulting in its The rigidity is poor, and it is easy to deform when the airflow impacts, causing the opening of the pre-rotation device to adjust the vane to be zero when it is closed, and there is also a deviation in the flow rate at a certain opening, which causes certain difficulties in the design of the control system for flow control.

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