Mixed cooling system for unmanned helicopter engine

Abstract

The invention relates to an cooling system for an engine, in particular to a mixed cooling system for an unmanned helicopter engine. The mixed cooling system comprises a water cooling cylinder sleeve,a water cooling cylinder sleeve water outlet pipe, a water cooling cylinder sleeve water inlet pipe, a water pump, a cooling radiator and a temperature control system; the water cooling cylinder sleeve is arranged on an engine cylinder head in a sleeving mode, and the water cooling cylinder sleeve and the cooling radiator are connected into a circulation loop through the water cooling cylinder sleeve water outlet pipe and the water cooling cylinder sleeve water inlet pipe; and the water pump is arranged on the water cooling cylinder sleeve water outlet pipe, and the temperature control systemis used for monitoring the temperature in the water cooling cylinder sleeve and controlling starting of the water pump according to the monitoring value; a first cooling fan is arranged above the water cooling cylinder sleeve, a second cooling fan is arranged on one side of the cooling radiator, and the first cooling fan and the second cooling fan are connected with a temperature controller. Themixed cooling system has the advantages of being high in cooling efficiency, wide in adjustable temperature range, automatic in height control and the like; and in addition, the temperature controllercan automatically select a corresponding cooling mode according to the water temperature range so that resource waste can be avoided.

Description

technical field [0001] The invention relates to an engine cooling system, in particular to an unmanned helicopter engine hybrid cooling system. Background technique [0002] Oil-powered large-load long-endurance unmanned helicopters often use aviation piston engines as power devices. This type of engine can provide maximum power output while ensuring optimal weight. Most of the existing aviation piston engines are air-cooled or water-cooled. Cool the engine. The best use state of the air-cooled heat dissipation method is the high-speed forward flight state of the unmanned helicopter. However, in actual aviation applications, due to mission requirements, the unmanned helicopter usually works at a low forward flight speed or hovering state. At this time, the air-cooled engine The heat dissipation effect is very unsatisfactory; the water-cooling heat dissipation method usually controls the start and stop of the water-cooling cycle according to a preset single temperature thres...

AI Technical Summary

Problems solved by technology

The best use state of the air-cooled heat dissipation method is the high-speed forward flight state of the unmanned helicopter. However, in actual aviation applications, due to mission requirements, the unmanned helicopter usually works at a low forward flight speed or hovering state. At this time, the air-cooled engine The heat dissipation effect is very unsatisfactory; the water-cooling heat dissipation method usually controls the start and stop of the water-cooling cycle according to a preset single temperature threshold, which cannot be automatically adjusted according to the temperature, resulting in waste of resources and shortening the battery life of unmanned helicopters

Especially for long-endurance unmanned helicopters with oil-driven large loads, a single air-cooled or water-cooled method cannot give full play to the technical characteristics of large loads and long-endurance unmanned helicopters

Images