Agricultural unmanned helicopter engine volute type air cooler

Abstract

The invention discloses a volute type air centralization cooler for an engine of an agricultural unmanned helicopter, and belongs to the technical field of helicopter engine cooling. The cooler comprises a volute, wherein a cylindrical air feeding chamber formed in the front part of the volute is integrally arranged on the volute; a centrifugal fan is mounted in a volute pipe of the volute and is concentric with the cylindrical air feeding chamber; the diameter of the centrifugal fan is larger than the inner diameter of the cylindrical air feeding chamber; two diffusers are symmetrically arranged on the two sides of the volute and communicated with the volute pipe through openings in the volute pipe wall; the openings are formed in the maximum sections of the volute pipe; an engine cylinder body is positioned at the outlets of the diffusers. According to the volute type air centralization cooler, the problem of engine heat dissipation in an operating process of the agricultural unmanned helicopter is well solved, and the volute type air centralization cooler is suitable for being popularized and applied in the technical field of agricultural helicopters.

Description

technical field [0001] The invention relates to an air-collecting cooler, in particular to an agricultural unmanned helicopter engine volute-type air-collecting cooler, which belongs to the technical field of helicopter engine cooling. Background technique [0002] Unmanned helicopters have the advantages of low cost, high efficiency, and convenient take-off and landing. They have been widely used in various fields, and their development prospects are quite promising. The engines currently used by unmanned helicopters in fields such as plant protection are basically air-cooled engines. This cooling method needs to be solved by natural air cooling when the helicopter is moving at high speed or forced air cooling by cooling fans. However, in the actual application of aviation plant protection, because The operation requires that the forward speed of the helicopter is slow, the natural wind generated by the forward movement is very small, and even hovering is required. The air-...

AI Technical Summary

Problems solved by technology

[0002] Unmanned helicopters have the advantages of low cost, high efficiency, and convenient take-off and landing. They have been widely used in various fields, and their development prospects are quite promising. The engines currently used by unmanned helicopters in fields such as plant protection are basically air-cooled engines. This cooling method needs to be solved by natural air cooling when the helicopter is moving at high speed or forced air cooling by cooling fans. However, in the actual application of aviation plant protection, because The operation requires that the forward speed of the helicopter is slow, the natural wind generated by the forward movement is very small, and even hovering is required. The air-cooled engine is limited by the shape of the shell and the internal structure of the body, and the heat dissipation effect is not good. In this case, the heat emitted by the engine cannot pass through. Unmanned helicopters advance at high speeds for natural air cooling or due to high external ambient temperature, causing the temperature inside the engine to rise sharply, often making the temperature of the engine above 230 degrees Celsius, which is difficult to cool down. This situation will affect the life of the helicopter. , the second is that the engine is easy to pull cylinders or hold cylinders, which can easily lead to crashes

In order to overcome the problem of high engine temperature during work, some in the industry use a large cooling fan near the engine. For a horizontally opposed engine, add two cooling fans with a diameter twice the size of the engine. Although the method has a certain effect, for the helicopter, the volume and weight of the installation are relatively large, which affects the working efficiency of the helicopter itself, and this method can only reduce the temperature of the engine to about 150 degrees Celsius. In the process of mechanical agricultural plant protection, in order to prevent the damage and loss caused by the overheating of the helicopter engine, it is often adopted to reduce the drug load. Although this method can ensure the safe operation of the helicopter, it will obviously affect the operation efficiency of agricultural plant protection

Images