Method and apparatus for reel-up of a paper web
AssigneeValmet Paper Machinery Inc.
InventorJuha Ehrola
Life of this patent
Estimating the term…
Abstract
A method and apparatus for reel-up of a paper web, wherein a roll is formed around a reeling drum or in another embodiment of the invention on the support of carrier rolls or carrier belts, and wherein a reeling cylinder is used to form a reeling nip for contacting the roll which is to be produced during passage of the paper web through the reel-up apparatus, includes a center axle and a cylinder mantle mounted for revolution around the axle comprised by the reeling cylinder. A method and apparatus for reel-up of a paper-web includes hydraulic loading elements for adjusting deflection of the cylinder mantle such that distribution of line pressure in the reeling nip, in its axial direction is controlled, e.g. maintained to be substantially uniform.
Claims17
A method of operating a reel-up apparatus for reel-up of a paper web wherein said web is formed as a roll comprising a plurality of layers of said web around a reeling drum and wherein the web passes through a reeling nip formed between a reeling cylinder and said drum, and wherein said reeling cylinder further comprises a cylinder mantle which revolves around a central axle of said cylinder, said method comprising the step of adjusting deflection of the cylinder mantle during its revolution so that distribution of line pressure in the reeling nip is controlled in an axial direction by rotating said central axle a desired amount such that at least one loading member mounted in the circumferential periphery of said central axle and projecting therefrom to impinge on said cylinder mantle is displaced such that it impinges on a desired area of said cylinder mantle to result in a desired deflection of said cylinder mantle and thus control the distribution of line pressure in said at least one reeling nip.
In reel-up apparatus for reel-up of a paper web or the equivalent, said apparatus comprising a frame construction, supporting means, a reeling drum and comprising at least one reeling cylinder which is mounted in connection with said frame construction for the reel-up and on which frame construction said supporting means are fitted to provide support for said reeling drum around which said web is wound to form a roll comprising a plurality of layers of said web, and said apparatus comprising at least one reeling nip formed between the roll and the reeling cylinder, said reeling cylinder comprising a rotatable central axle and a cylinder mantle spaced apart from and surrounding said central axle and said reel-up apparatus further comprising means for rotating said rotatable central axle;
- the improvement comprising means for controlling the distribution of line pressure in said at least one reeling nip during reel-up, said means for controlling comprising at least one loading member mounted in the circumferential periphery of said central axle and projecting therefrom to impinge on said cylinder mantle whereby a selected rotation of said central axle by said means for rotating results in displacement of said at least one loading member such that it impinges on a desired area of said cylinder mantle to result in a desired deflection of said cylinder mantle and thus to control the distribution of line pressure in said at least one reeling nip.
A method of operating a reel-up apparatus for reel-up of a paper web, comprising forming a web as a roll around a support means, passing the web through a reeling nip formed between a reeling cylinder and said support means, providing said reeling cylinder with a cylinder mantle, providing said reeling cylinder with a series of loading members fitted into said mantle, revolving said mantle of said reeling cylinder around a central axle of said cylinder, providing an adjustable pressure medium to said loading members which operates as a lubricant for said loading members and for the inner circumference of said mantle during its revolution, adjusting said pressure medium so that the deflection of the reeling nip is compensated and deflection of the cylinder mantle during its revolution is adjusted so that distribution of line pressure in the reeling nip is controlled in an axial direction.
A method of operating a reel-up apparatus for reel-up of a paper web, comprising forming a web as a roll around a reeling drum or on other support means, passing the web through a reeling nip formed between a reeling cylinder and the roll being wound, providing said reeling cylinder with a cylinder mantle, providing said reeling cylinder with a series of loading members fitted into said mantle, revolving said cylinder mantle of said reeling cylinder around a central axle of said cylinder, providing an adjustable pressure medium to said loading members which operates as a lubricant for said loading members and for the inner circumference of said mantle during its revolution, adjusting said pressure medium so that the deflection of the reeling nip is compensated and deflection of the cylinder mantle during its revolution is adjusted so that distribution of line pressure in the reeling nip is controlled in an axial direction.
Dependencies are inferred from the claim text.