Title:
【発明の名称】紙用カレンダにおけるニップ通過面の汚染および/または損傷の検出方法
Document Type and Number:
Japanese Patent JP2001523774
Kind Code:
A
Abstract:
The invention concerns a method for detecting a contamination and damaging of a face (10) that runs through a nip or nips (N1 . . . N10) in a calendar for paper. In the method vibrations occurring in connection with the constructions (18, 100) of a calendar are detected and processed. The vibrations are detected by at least one vibration detector (40; 41 . . . 46; 41a. . . 46a, 41b. . . 46b) fitted in connection with the bearing supports of calendar rolls (11 . . . 16) or in connection with constructions (18, 100) related to said bearing supports. By the way of these vibration detectors the calendar roll(s) (11 . . . 16) is/are identified from which the vibration derives. In the method , it is possible to observe the rotation of all of the rolls to be monitored and to measure vibration from any suitable point whatsoever, for example from the frame (100) of the machine, by employing at least one vibration detector (40), the time (Tr) of the cycle of the vibration signal obtained from said detector(s) being compared with the numbers of revolutions of the rolls to be monitored. In this way, the source of the disturbance is determined, and action is taken in order to eliminate the disturbance.
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Inventors:
Suomi, Eero
Maenpaa, Tapio
Karjaleinen, Alto
Maenpaa, Tapio
Karjaleinen, Alto
Application Number:
JP2000521276A
Publication Date:
November 27, 2001
Filing Date:
November 03, 1998
Export Citation:
Assignee:
Valmet Corporation
International Classes:
D21G1/00; G01H1/00; D06H3/10; (IPC1-7): D21G1/00; D06H3/10
Attorney, Agent or Firm:
Takao Katori