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combine harvester

A technology of combine harvesters and fans, which is applied in agricultural machinery and implements, threshing equipment, applications, etc., can solve the problems that the separation device cannot be used for maximum effect and complexity.

Inactive Publication Date: 2014-10-15
爱科股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is complicated by the recent development of separating devices arranged upstream capable of supplying very high crop flows
Insufficient performance in the cleaning unit becomes a bottleneck for the entire harvester, where the improved separation unit cannot be used for maximum effect

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] When reading the following description, it should be understood that the terms longitudinal and transverse are relative to the normal direction of travel of the combine harvester. In other words, the term portrait is equivalent to the front-rear direction, and the term landscape is equivalent to the landscape or left-right direction. Also, the terms axial and radial are relative to a rotating body such as a shaft, wherein axial is equivalent to a direction along the axis of rotation and radial is equivalent to a direction perpendicular to the axis of rotation.

[0024] refer to figure 1 , combine harvester 10 includes a header (not shown) that cuts crops as harvester 10 drives across a field. The crop is conveyed by elevators (also not shown) to the threshing drum (generally indicated at 12). The threshing drum 12 rotates on a transverse axis 13 within a drum shell 14 . Breakaway bars 15 cause the grain to be threshed from the heads of each plant and a portion of the...

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PUM

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Abstract

The invention discloses a combine harvester (10), which includes a fan device (26) for generating an air flow through a cleaning device (24) to separate chaff from grains. The fan assembly includes a plurality of fan assemblies (35) for generating spaced apart air sub-flows. The cleaning device includes an auxiliary air inlet between two adjacent air sub-flows and means (52) for narrowing the passage of each air sub-flow in the vicinity of the auxiliary air inlet (50). The narrowed device creates a lower pressure area (L) due to the venturi effect. This lower pressure area draws air into the air flow directly from the external environment through the auxiliary air inlet, thereby reducing the lateral component of the sub-air flow and providing a more uniform air flow through the cleaning device.

Description

technical field [0001] The present invention relates to a combine harvester and in particular to its grain cleaning section downstream of the threshing device. Background technique [0002] For decades, farmers have used self-propelled combines to harvest a wide range of crops, including grains, corn and canola. Typically, a combine harvester cuts the crop, threshes the grain from the crop, separates the grain from the straw, and cleans the grain before storage in an on-board storage tank. Straw and crop residues are ejected from the rear of the machine. Well setting means for cleaning grain consists of causing the grain to fall on a reciprocating screen in combination with directing air flow across the top surface of the screen. The grain passes through the sieve, while the lighter crop residues or chaff are carried away and discharged by the generally horizontal air flow. Typically, the speed of the air flow is controlled to enable the operator to expel the chaff withou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01F12/44
CPCA01F12/444
Inventor J·B·索伦森
Owner 爱科股份公司
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