DOCTOR CONTROL SYSTEMS FOR PAPERMAKING MACHINES AND RELATED METHODS

摘要

A papermaking machine includes a Yankee dryer, a doctor, and a doctor blade loading control system. The doctor blade loading control system includes a first doctor loading cylinder coupled to the doctor and configured to selectively apply a loading force to the doctor, a second doctor loading cylinder coupled to the doctor and configured to selectively apply a loading force to the doctor, a first air line in communication with the first doctor loading cylinder, a second air line in communication with the second doctor loading cylinder, a first electronic pressure controller configured to control a loading pressure of the first doctor loading cylinder on the doctor based on a first loading pressure setpoint, and a second electronic pressure controller configured to control a loading pressure of the second doctor loading cylinder on the doctor based on a second loading pressure setpoint.

主权项

1. A papermaking machine for manufacturing a paper product, the papermaking machine comprising:
a Yankee dryer configured to rotate about an axis thereof; a doctor positioned about the Yankee dryer, the doctor comprising a doctor blade supported by a doctor blade holder; and a doctor blade loading control system in communication with the doctor, the doctor blade loading control system comprising:
a first doctor loading cylinder coupled to a tend side of the doctor and configured to selectively apply a loading force to the doctor;a second doctor loading cylinder coupled to a drive side of the doctor and configured to selectively apply a loading force to the doctor;a first air line in communication with a load side of the first doctor loading cylinder and configured to deliver air thereto;a second air line in communication with a load side of the second doctor loading cylinder and configured to deliver air thereto;a first electronic pressure controller disposed along the first air line and configured to control a loading pressure of the first doctor loading cylinder on the doctor based on a first loading pressure setpoint; anda second electronic pressure controller disposed along the second air line and configured to control a loading pressure of the second doctor loading cylinder on the doctor based on a second loading pressure setpoint.