Treatment element for treating material in a multi-shaft worm machine and multi-shaft worm machine
AssigneeCoperion GmbH
InventorUlrich Burkhardt
Life of this patent
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Abstract
A treatment element to treat material in a multi-shaft worm machine has an outer contour with at least one outer contour portion, the associated evolute of which is a quantity of at least three points, each of the points lying outside the longitudinal axis and within the outer radius of the treatment element and two respective adjacent points having a spacing from one another, which is less than half the core radius. The treatment element ensures high flexibility during the adjustment of shear and/or extensional flows on the material to be treated.
Claims25
A treatment element for treating material in a multi-shaft worm machine, comprising
- a longitudinal axis M,
- a respective core radius Ri having the longitudinal axis M as the centre point and an outer radius Ra,
- an outer contour A(φ) running about the longitudinal axis M, wherein
- φ is the angle about the longitudinal axis M and
- Ri≦DA(φ)≦Ra applies to a spacing DA(φ) of the outer contour A(φ) from the longitudinal axis M,
- wherein
- the outer contour A(φ) has at least one outer contour portion A(Δφ), which runs along an angle portion Δφ,
- which has a continuously changing spacing DA(Δφ) from the longitudinal axis M, wherein Ri<DA(Δφ)<Ra, and
- which has an associated evolute E,
- which is a quantity of n points P(i) where i=1 to n and n≧3,
- wherein each of the points P(i) lies outside the longitudinal axis M and within the outer radius Ra, and
- wherein two respective adjacent points P(i) and P(i+1) have the spacing Δr(i) from one another, which is less than Ri/2.
A multi-shaft worm machine with
- a housing,
- at least two housing bores, which penetrate one another and are parallel to one another,
- at least two shafts arranged concentrically in the housing bores,
- which are rotatably drivable about associated rotational axes, and
- which have an axial spacing a of the rotational axes,
- a plurality of treatment elements for treating material,
- which are non-rotatably arranged one behind the other in an axial direction on the at least two shafts, and
- which are configured to tightly mesh with one another,
- wherein
- at least two treatment elements arranged directly next to one another are configured such that each treatment element comprises
- a longitudinal axis M,
- a respective core radius Ri having the longitudinal axis M as the centre point and an outer radius Ra,
- an outer contour A(φ) running about the longitudinal axis M, wherein
- φ is the angle about the longitudinal axis M and
- Ri≦DA(φ)≦Ra applies to a spacing DA(φ) of the outer contour A(φ) from the longitudinal axis M,
- wherein
- the outer contour A(φ) has at least one outer contour portion A(Aφ), which runs along an angle portion Δφ,
- which has a continuously changing spacing DA(φ) from the longitudinal axis M, wherein Ri<DA(Δφ)<Ra, and
- which has an associated evolute E,
- which is a quantity of n points P(i) where i=1 to n and n≧3,
- wherein each of the points P(i) lies outside the longitudinal axis M and
- within the outer radius Ra, and
- wherein two respective adjacent points P(i) and P(i+1) have the spacing, and
- the sum of the core radius Ri and the outer radius Ra substantially equals the axial spacing a.
Dependencies are inferred from the claim text.