公开(公告)号：US12091819B2

公开(公告)日：2024-09-17

申请号：US17115303

申请日：2020-12-08

Applicant: Valmet Technologies Oy

Inventor： Juha Aronen

IPC: D21D1/00 ,  B02C7/02 ,  B02C7/14 ,  B02C7/16 ,  D21D1/24 ,  G01H1/00

CPC classification number: D21D1/002 ,  B02C7/02 ,  B02C7/14 ,  B02C7/16 ,  D21D1/24 ,  G01H1/00

Abstract: An arrangement and a method for adjusting a blade gap in a refiner. The arrangement comprises at least one loading device arrangeable to move at least one refining element of the refiner in respect of at least one another refining element of the refiner for adjusting the blade gap between the refining elements, at least one vibration measuring device for measuring a vibration of the refiner in operation, and at least one control unit configurable to adjust the blade gap between the refining elements by controlling the at least one loading device to move the at least one refining element in respect of the at least one another refining element based on the measured vibration of the refiner.

公开(公告)号：US20210180251A1

公开(公告)日：2021-06-17

申请号：US17115303

申请日：2020-12-08

Applicant: Valmet Technologies Oy

Inventor： Juha Aronen

IPC: D21D1/00 ,  D21D1/24

Abstract: An arrangement and a method for adjusting a blade gap in a refiner. The arrangement comprises at least one loading device arrangeable to move at least one refining element of the refiner in respect of at least one another refining element of the refiner for adjusting the blade gap between the refining elements, at least one vibration measuring device for measuring a vibration of the refiner in operation, and at least one control unit configurable to adjust the blade gap between the refining elements by controlling the at least one loading device to move the at least one refining element in respect of the at least one another refining element based on the measured vibration of the refiner.

公开(公告)号：US20250059708A1

公开(公告)日：2025-02-20

申请号：US18719716

申请日：2023-01-05

Applicant: Valmet Technologies Oy

Inventor： Juha Aronen ,  Pekka Saukko

IPC: D21D1/00 ,  D21D1/20

Abstract: A loading device (10) is used to adjust the size of a blade gap (9) in processing equipment for processing fibrous material. The loading device has a gearing (12) coupled in connection with a processing element (5, 6) to move the processing element (5, 6) in respect of another processing element (5, 6) for adjusting the size of the blade gap (9) between the processing elements. A cage induction motor (14) has a shaft (15) coupled to the gearing for operating the gearing, a position sensor (16) for measuring a rotational position (M-RP) of the shaft of the motor for indicating a position of the processing element in respect of the another processing element, and a frequency converter (17) coupled to the position sensor and to the motor for controlling the operation of the motor based on the measured rotational position of the shaft of the motor.