Hot air cleaning and sorting system for combined harvester and working method

Abstract

The invention provides a hot air cleaning and sorting system for a combined harvester and a working method, and belongs to the field of agricultural machinery. The hot air cleaning and sorting systemfor the combined harvester comprises an engine heat dissipation device, an air distribution system and a cleaning and sorting device; the engine heat dissipation device transfers heat generated by anengine to the air distribution system, and the air distribution system blows the air to the cleaning and sorting device so as to carry out drying on surfaces of grains in the cleaning and sorting device; the engine heat dissipation device comprises a fan and a radiator; and the fan blows the hot air in the radiator into an air distribution chamber, a centrifugal fan in the air distribution chamberblows the hot air into the cleaning and sorting device. The cleaning and sorting device can sufficiently utilize waste heat of a diesel engine in the working process of the combined harvester to carry out cleaning and sorting on moist materials, the adverse effect of a high temperature of the engine on devices and facilities around can be reduced, the working temperature of the engine of the combined harvester can be obviously reduced, working stability and reliability of the engine are ensured, free water on the surfaces of the moist materials is rapidly removed, moisture content in the moist agricultural materials is obviously reduced, and cleaning and sorting blockage generated by moisture is avoided.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and particularly relates to a cleaning fan for mechanized combined harvesting of wet crops (such as rice, rapeseed, etc.), which is a device that can be used to improve the cleaning effect of wet materials in mechanized combined harvesting operations. Background technique [0002] In mechanized combined harvesting operations, the threshed grains often have a high moisture content and a water film on the surface, because the stalks interrupted by the threshing poles will generate free water and adhere to themselves and the surface of the grains. This will bring great difficulties to cleaning, and then affect the overall operating efficiency of the combine harvester. Therefore, the design of the cleaning fan part in mechanized combined harvesting is very critical. [0003] At present, there is no fan used in the market for combine harvester cleaning with a heating function, so that when harves...

AI Technical Summary

Problems solved by technology

[0002] In mechanized combined harvesting operations, the threshed grains often have a high moisture content and a water film on the surface, because the stalks interrupted by the threshing poles will generate free water and adhere to themselves and the surface of the grains. This will bring great difficulties to cleaning, which will affect the overall operating efficiency of the combine harvester. Therefore, the design of the cleaning fan part in mechanized combined harvesting is very critical

[0003] At present, there is no fan used in the market for combine harvester cleaning with a heating function, so that when harvesting wet and high-viscosity crops, due to the high moisture content and high viscosity of crop stalks and grains, it is often in the mechanized combination. Harvest threshing and cleaning links cause different degrees of blockage or grain entrainment loss, which seriously restricts the cleaning efficiency of crops, thus significantly reducing the operating efficiency of the whole machine

In addition, the heat utilization efficiency of the combine harvester engine is only 30% to 40%. Most of the heat is discharged into the atmosphere in the form of exhaust and heat dissipation. The temperature of the exhaust gas can reach up to 400 degrees, far exceeding the ignition point of field weeds, so there is safety Hidden danger

Images