A self-explosion-proof axial flow fan with speed self-detection

Abstract

The invention belongs to the technical field of explosion-proof axial flow fans, in particular to an anti-explosion axial flow fan with speed self-detection, which includes a support plate, the surface of the support plate is fixedly connected with the fan casing, and the two support plates are centered on the axis of the fan casing. Symmetrically distributed, the surface of the support plate is L-shaped, the surface of the fan casing is circular, the inner wall of the fan casing is fixedly connected with a fixing frame, and the surface of the fixing frame is fixedly installed with an explosion-proof motor. The speed self-detection anti-self-explosion axial flow fan, by setting the speed detection device, when the explosion-proof axial flow fan is working, when the rotation speed of the rotating shaft is too fast, the pressure inside the second function box becomes larger, pushing the first electrical contact and the second The two electrical contacts are electrically connected, and the first indicator light is on for warning, indicating that the rotation speed of the shaft is too fast, thus solving the problem that the shaft speed of the explosion-proof axial flow fan is too fast, which may easily cause the explosion of the axial flow fan and cause a safety hazard.

Description

technical field [0001] The invention relates to the technical field of explosion-proof axial flow fans, in particular to a rotational speed self-detection anti-self-explosion axial flow fan. Background technique [0002] Axial flow fans are very widely used, that is, the airflow in the same direction as the axis of the fan blades, such as electric fans, air conditioner outdoor fans are axial flow fans. It is called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are usually used in applications with high flow requirements and low pressure requirements. Axial fans fix the position and move the air. The axial flow fan is mainly composed of the fan impeller and the casing. The structure is simple but the data requirements are very high. [0003] Explosion-proof axial flow fan is suitable for conveying flammable, explosive and non-corrosive gases. The ambient temperature should not exceed 60 °C. It is widely used in general factories, warehouses, ...

AI Technical Summary

Problems solved by technology

[0005] Based on the fact that the main shaft speed of the existing explosion-proof axial flow fan is controlled at 1450r / min and 1400r / min, if the main shaft speed is too fast, it is easy to cause the explosion of the axial flow fan, causing technical problems of potential safety hazards. The present invention proposes a speed self-detection Anti-explosion axial flow fan

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