Method for producing a yankee cylinder

A kind of Yankee, steel manufacturing technology, applied in the direction of manufacturing tools, papermaking, papermaking machines, etc., can solve problems such as expensive equipment, large-scale and so on

Inactive Publication Date: 2014-01-01
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Because the cylinder shell has a diameter of 6500 mm and a length of 8500 mm, machining the cylinder shell requires very large and expensive equipment

Method used

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  • Method for producing a yankee cylinder
  • Method for producing a yankee cylinder
  • Method for producing a yankee cylinder

Examples

Experimental program
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Effect test

Embodiment Construction

[0054] figure 1 A Yankee cylinder 1 is shown. The Yankee cylinder 1 comprises a cylindrical steel shell 2 which is welded or bolted to two end covers 3 and 4 .

[0055] Inside the Yankee cylinder 1 there is a central shaft 7 with a central part 21 and two bearing shafts 20 which rotate in bearings 17 .

[0056] During operation, steam is supplied to the Yankee cylinder 1 via a steam feed 18 . Waste steam and condensate exit the Yankee via condensate lines 22 and 19, respectively. On the cylinder inner side 15 there are a large number of grooves 11 which extend in the circumferential direction of the Yankee cylinder 1 . Through the groove 11 , the transfer of heat to the outside 16 of the cylinder is enhanced and the removal of condensate through the condensate pipe 22 is facilitated.

[0057] In the manufacturing methods used so far in the prior art, individual shell plates are cut, crimped and welded together to form the cylinder sections. Afterwards, the entire cylinder...

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PUM

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Abstract

The method involves cutting and rolling of coated plates. The welding of shell plates to several cylinder sections (8,9) is performed. The mechanical preprocessing of individual cylinder sections on the inner and outer sides, and at the end faces is performed. The welding of individual cylinder sections to a finished cylindrical surface (2) of Yankee cylinder is performed.

Description

technical field [0001] The subject of the invention is a method of manufacturing a steel Yankee cylinder. The invention also relates to a Yankee cylinder manufactured according to the manufacturing method of the invention. Background technique [0002] So-called Yankee cylinders are often used for drying in the production of web or tissue paper. [0003] Yankee cylinders generally have a very large diameter. They are heated from the inside using steam and are difficult to manufacture because of the stringent requirements to be met concerning the inside pressure the cylinder barrel must withstand, the degree of leak-tightness of the cylinder and its large diameter. [0004] Standard Yankee cylinders have the following dimensions: [0005] Cylinder diameter: 2000 mm to 6500 mm [0006] Hollow shaft diameter: 1000 mm to 2500 mm [0007] Cylinder length: 3000 mm to 8500 mm [0008] Cylinder mass: 35 tons to 140 tons [0009] Most cylinder barrels are made of cast iron, ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/02D21F5/18
CPCB23K37/08D21F5/181D21F5/021Y10T29/49393B23K37/02
Inventor 约瑟夫·克拉塞尔马库斯·迈尔路德维希·卡瑟夫斯基
Owner ANDRITZ AG
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