Roll
AssigneeJ. M. Voith GmbH
InventorChristian Schiel
Life of this patent
Estimating the term…
Abstract
A roll, specifically a paper machine press roll, with a hollow rotatable roll body features a roll shell and on at least one of its two ends a hollow roll journal. A guide body which is stationary or fastened to the roll body extends through the interior of the roll body and forms with the roll shell a channel system through which a tempering medium flows. For purposes of using air as tempering medium, a pressure blower and/or a suction blower are connected to the channel system. The channel system and the blower(s) are so dimensioned that an air flow velocity above 10 m/sec will materialize in the channel system.
Claims20
A roll for forming a press gap with a backing roll, said roll comprising:
- a hollow rotatable roll body having two ends and featuring a roll shell, said roll body including on at least one of said two ends a hollow roll journal;
- a guide body extending through the interior of said roll body, said guide body being one of stationary and fastened to said roll body, said guide body and said roll shell defining a channel system through which operationally flows a tempering medium;
- and
- blowing means operatively connected to said channel system for supplying said tempering medium;
- said channel system and said blowing means being dimensioned so that when air is said tempering medium the air may flow through said channel system at a velocity of more than 10 m/sec.
A roll for forming a press gap with a backing roll, said roll comprising:
- a hollow rotatable roll body having two ends and featuring a roll shell, said roll body including a hollow roll journal at each end thereof, said roll shell and said hollow roll journals defining a one-piece roll body, each of the hollow roll journals and the roll shell being respective inside diameters wherein the inside diameters of the hollow roll journals are smaller than the inside diameter of the roll shell;
- a guide body extending through the interior of said roll body, said guide body being one of stationary and fastened to said roll body, said guide body being formed of a flexible material and (a) comprising a foldable hose and a tubular support body which extends through the interior of the hose and to which the hose is connected by means of flexible end walls, (b) the interior of said tubular support body is connected to a compressed air line, and (c) the hose includes air discharge openings;
- said tubular support body including air passage openings situated interior of the hose, said air discharge openings comprising an entire air discharge flow cross section and air passage openings comprising an entire air passage flow cross section, wherein the entire air passage flow cross section is greater than the entire air discharge flow cross section, said guide body further being sized and configured to be inserted through one of said hollow roll journals and expanded to a cylindrical body inside the roll body, said guide body and said roll shell defining a channel system through which operationally flows a tempering medium;
- and
- blowing means operatively connected to said channel system for supplying said tempering medium;
- said channel system and said blowing means being dimensioned so that when air is the tempering medium the air may flow through said channel system at a velocity of more than 10 m/sec.
A method for tempering a roll shell of a one-piece hollow roll body, wherein said one-piece hollow roll body is defined by said roll shell and a hollow roll journal at each end thereof, each of the hollow roll journals and the roll shell having respective inside diameters wherein the inside diameters of the roll shell, and wherein a guide body extends through the interior of the roll body, said guide body having a diameter, said diameter being larger than the inside diameter of the journals and smaller than the inside diameter of the roll shell, the method comprising:
- introducing a tempering medium into the interior of the hollow roll body, and passing said tempering medium at a velocity greater than 10 m/sec through a channel system in said roll body interior, said channel system defined by said roll shell and said guide body.
A roll for forming a press gap with a backing roll, said roll comprising:
- a hollow rotatable roll body having two ends and featuring a roll shell, said roll body including a hollow roll journal at each end thereof, said roll shell and said hollow roll journals defining a one-piece roll body, each of the hollow roll journals and the roll shell having respective inside diameters wherein the inside diameters of the hollow roll journals are smaller than the inside diameter of the roll shell;
- a guide body extending through the interior of said roll body, said guide body being one of stationary and fastened to said roll body, said guide body and said roll shell defining a channel system through which operationally flows a tempering medium, said guide body including a plurality of disks positioned across the length of the roll and arranged at least approximately coaxial to the roll body, the outside diameter of each disk being smaller than the inside diameter of the roll shell so that said channel system is defined thereby, each of said disks being subdivided into segments, said segments being mountable and assemblable inside the roll;
- and
- blowing means operatively connected to said channel system of supplying said tempering medium;
- said channel system and said blowing means being dimensioned so that when air is the tempering medium the air may flow through said channel system at a velocity of more than 10 m/sec.
Dependencies are inferred from the claim text.