VERTICAL CRUSHER

WIPO Patent Application WO/2019/244678

A1

In a vertical crusher in which the rotation speed of a rotating table is variable, occurrence of vibrations at start-up is inhibited. This vertical crusher: comprises a rotating table, a motor for rotating the rotating table, a control device for controlling the rotation speed of the motor via an inverter, and multiple rollers that are driven to rotate by the rotation of the rotating table; and crushes raw material supplied between the rotating table and the multiple rollers. The control device: fixes the rotation speed of the rotating table at a previously established specific rotation speed in an excess supply period, immediately after starting raw material supply, in which a first amount of raw material per unit time is supplied; and in a supply amount-reducing period, after the excess supply period, in which the supply amount per unit time is reduced to a second amount that is less than the first amount and in a supply amount-increasing period, after the supply amount-reducing period, in which the supply amount per unit time increases, varies the rotation speed of the rotating table according to the raw material supply amount per unit time.

TANABE TAKETOSHI (JP)
UNEHARA MASAYA (JP)
TAKENO YUTAKA (JP)

PCT/JP2019/022790

December 26, 2019

June 07, 2019

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MITSUBISHI HITACHI POWER SYS (JP)

B02C25/00; B02C15/04

JPH11147047A	1999-06-02
JP2014137196A	2014-07-28
JPH0938512A	1997-02-10
JPH09192514A	1997-07-29
JPH11319602A	1999-11-24
JPH0429761A	1992-01-31

THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)

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