External rotor engine and UAV

Abstract

The invention discloses an external rotor engine and an unmanned aerial vehicle. The outer rotor engine includes a fixed eccentric shaft fixed on the engine base and used as an inner support of the outer rotor engine, and an outer rotor mechanism sleeved outside the fixed eccentric shaft and used to rotate and perform work. The fixed eccentric shaft supports the outer rotor mechanism through bearings , the outer rotor mechanism includes a pentagonal inner rotor and an outer casing rotor; the inner ring gear on the inner surface of the pentagonal inner rotor meshes with the outer gear in the middle of the cylinder head of the outer casing rotor, and the position difference between the inner ring gear and the outer gear is the gear center distance, which is guaranteed by the eccentricity of the fixed eccentric shaft; the pentagonal inner rotor is eccentrically arranged in the cavity of the outer casing rotor, and the pentagonal inner rotor performs a generating movement in the cavity of the outer casing rotor; the outer machine The casing rotor rotates to drive the pentagonal inner rotor to rotate, and the pentagonal inner rotor and the outer casing rotor rotate in the same direction and are on the same fixed eccentric shaft. Cooling air flow can be obtained without balancing counterweight, which has the advantage of heat dissipation.

Description

technical field [0001] The present invention relates to the technical field of aircraft engines, in particular, to an external rotor engine. In addition, the present invention also relates to an unmanned aerial vehicle comprising the above-mentioned external rotor engine. Background technique [0002] The earliest practical rotary cylinder engine was the Grom engine, designed by the Seguin brothers, which first flew in 1909. It is relatively reliable and has a high power-to-weight ratio, which greatly promotes aviation. Most of the pre-World War I speed records were held by aircraft with Grom engines. The cylinders of a rotary engine are arranged along the circumference of the casing, just like a radial engine, but the crankshaft is fixed to the fuselage, and instead the crankcase and cylinders rotate. The advantage of this layout is that a satisfactory cooling airflow is obtained, even at low airspeeds. Retaining the weight advantage and the simplicity of the air-cooled...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an external rotor engine and an unmanned aerial vehicle to solve the technical problems of the existing rotor engine with large thermal load, short service life and difficulty in balancing the eccentric shaft

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