讨论造纸传动 点击：2628 | 回复：24
发表于：2003-12-10 10:14:00
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有关于造纸机的传动选型主要还是根据纸机供应商提供的RDC来选择.
你要是想对造纸传动系统有过多的了解，最好能同机械了解纸机各部分的情况，因为有些时候是纸机影响传动。推荐 TAPPI和芬兰造纸协会在2000年出的造纸技术丛书，共19册,其中的DRY 部分有对传动系统的描述和选型原则。以下可能对你有些帮助：
Some general rules are the following:
- The wire is the main section of the entire machine. When the speed of the wire is the same as the machine speed and very constant, keeping the jet to wire ratio at the proper value is easier. In tissue machines, the main section is usually the Yankee drive because of its large inertia.
- Drives with good contact to the paper web (wide angle of wrap on roll) are part of the chain. This means that their draw setting or speed difference setting influences the remainder of the material downstream.
- Drives with poor contact to the paper web follow the section leader. This means their speed difference settings vs. the section master do not influence downstream sections. These sections are called branches of the speed reference chain.
- Press section, dryers, calenders, and reel are usually part of the reference chain.
- Top wires, paper lead rolls, bowed rolls, coating stations and other drives with poor contact to the web are branches of the chain.
- Drives that mechanically connect together use a master and slave mode. No clear rules exist for selecting the master. Sometimes, the drive with the biggest power demand or the drive that touches the web in an open nip mode is the master. In soft calenders, the harder roll is better as a speed controlled master than the soft roll whose dynamic diameter depends on nip pressure. In sections with multiple drives on a common felt, the master drive for the draw chain should be the one that "pulls" the felt rather than "pushes" the felt.
- The draws between the sections in a paper machine relate to speed. The draw settings are in percentages.
- One drive is a leader for the section (press section, first dryer section, etc.). All other drives in the section have their speed set relative to the lead drive.
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