Method and apparatus for ejecting material
AssigneeClaas KGaA
InventorsNorbert Strieker, Ludger Hugenroth
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Abstract
The invention concerns a method and an apparatus for ejecting a material, in particular a straw material, having a pivot unit comprising an impeller blower, a cooperating fluid cylinder, with a control unit comprising at least one directional control valve for control of the fluid cylinder so that at least one ejection nozzle of the impeller blower can be pivoted reciprocally. The control unit further comprises a pressure control valve. An electrical control device is provided, which acts on the pressure control valve and/or the directional control valve in such a way that a piston of the fluid cylinder essentially performs a harmonic reciprocating movement.
Claims21
A method for ejecting a particulate material comprising the steps of:
- mounting an impeller blower for pivotal movement;
- reciprocating a fluid cylinder and causing the impeller blower to pivot back and forth;
- controlling the flow of fluid to the fluid cylinder during the pivot operation so there is a gradually increasing pressure on the fluid cylinder piston followed by a pressure drop before reversal of the fluid cylinder.
An apparatus for ejecting a material including a pivot unit comprising an impeller blower having at least one ejection nozzle and a cooperating fluid cylinder which has a piston operatively connected to the impeller blower;
- a control unit comprising at least one directional control valve for control of the fluid cylinder, and so constructed and arranged that the ejection nozzle is pivoted reciprocally;
- the control unit comprising a pressure control valve and an electrical control device which acts on the pressure control valve and on the directional control valve in such a way that the piston of the fluid cylinder has a generally harmonic reciprocating movement.
Dependencies are inferred from the claim text.