Servo control device and method for disc gap in disc powder grinding system

Patent metadata

Field	Value
Publication number	US-11020749-B2
Application number	US-201816318594-A
Country	US
Kind code	B2
Filing date	Dec 13, 2018
Priority date	Sep 30, 2018
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Provided is a disc gap servo control device and method for a powder grinding system, which includes a disc powder grinding machine, a rotating speed regulating device of a rotating disc, the disc gap servo control device and a control cabinet. The method includes the following steps of: (1) inputting a control information; (2) an industrial computer obtaining a current disc gap and displaying the disc gap on a touch screen; (3) the disc gap servo control device adjusting the disc gap; (4) the current disc gap reaches a target disc gap; and (5) a frequency converter controlling a motor rotating speed, so that the actual rotating disc rotating speed can reach a target rotating speed of the rotating disc. The operation parameters of the rotating disc are observed by the industrial computer in real time, and finally a high-precision servo control of the disc gap can be realized.

First claim

What is claimed is:

1. A control method for a disc gap servo control device for a disc powder grinding system, the method comprising the following steps:
step 1, inputting a control information to an industrial computer through a touch screen, wherein the control information comprises a target rotating disc rotating speed and a target disc gap;
step 2, transmitting a position information to the industrial computer through a position sensor, so that the industrial computer obtains a current disc gap accordingly and displays the disc gap on the touch screen;
step 3, using the industrial computer to generate a control command according to a difference value between the current disc gap and the target disc gap and control a disc gap servo control device to adjust a disc spacing, which specifically comprises the following steps that:
step 3.1, the industrial computer generates the control command according to the difference value between the current disc gap and the target disc gap, and controls an AC servo motor to rotate accordingly; and
step 3.2, the AC servo motor is decelerated by a decelerator, drives a mechanical linkage, and further drives a rotating shaft and a rotating disc to move horizontally for a certain distance, so as to realize precise control of the disc spacing;

step 4, repeating the steps 2-3 until the current disc gap reaches the target disc gap, then going to the next step; and
step 5, controlling a rotating speed of a driving motor by the industrial computer through a frequency converter according to a target rotating disc rotating speed, and further controlling the rotating disc rotating speed, so that an actual rotating disc rotating speed can reach the target rotating disc rotating speed.

Assignees

• Univ Northeastern

Inventors

• Zhou Ping
• Li Mingjie
• Wang Hong
• Chai Tianyou

Classifications

• B02C7/14 Primary

  Adjusting, applying pressure to, or controlling distance between, discs · CPC title

• D21D1/30

  Disc mills · CPC title

• B02C7/16

  Driving mechanisms · CPC title