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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 2. Отображено 2.
14-07-2023 дата публикации

Frequency conversion control method and device for hoisting equipment

Номер: CN116425042A
Автор: QIN CHUAN, MA YUNHUA, LI ZHENG, LI HELIANG, CUI WEIFENG, WU XIAOHU, FU HAILONG, ZHANG LICHAO, YANG KANG, YANG ZHEN, FENG AIJUN, LI JUNHENG, ZHU TINGHONG, ZHANG WEI, BI HANWEN, YUAN ZHIZHI, DENG SHUANG, YUAN JIE, YANG MINGGUANG, SUN GUIXUN, SHU YUMING, ZHU HONGZHENG, LYU TONG, ZHAO LONG, WANG YUANQIAO, YANG TONG, DONG YUBO, JIANG JIAJUN
Принадлежит:

The invention provides a frequency conversion control method and device for hoisting equipment, and relates to the technical field of hydraulic engineering hoisting equipment. The method comprises the following steps: acquiring a lifting hook direction control signal, bus voltage of a frequency converter at the current moment and the mass of a target object lifted by a lifting hook; acquiring a light-load acceleration instruction according to the mass of the target object, and acquiring a potentiometer analog signal instruction according to the bus voltage; acquiring lifting hook speed control signals with different frequencies according to the light-load speed increasing instruction and the potentiometer analog signal instruction; the lifting hook direction control signal and the lifting hook speed control signal are sent to a variable frequency motor through a frequency converter, and variable frequency control is conducted on the rotating direction and the rotating speed of a motor machine ...

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Номер записи: 1
04-07-2023 дата публикации

Rapid plugging device and plugging method for long crack seepage point at pipeline elbow

Номер: CN116379251A
Автор: DONG YUBO, SHU YUMING, ZHA RONGRUI, YAN XIANG, MA YUNHUA, LI ZHENG, LI HELIANG, YUAN JIE, YANG MINGGUANG, WU XIAOHU, QIN CHUAN, BI HANWEN, SUN GUIXUN, WANG JIANG, ZHU HONGZHENG, YUAN ZHIZHI, YANG TONG, LUO GUANGHUI, ZHANG LICHAO, DENG SHUANG, LYU TONG, ZHAO LONG, ZHANG WEIMING
Принадлежит:

The invention provides a quick plugging device and method for a long crack seepage point at a pipeline elbow. The method comprises the following steps: temporarily plugging a crack on a pipeline by adopting a waterproof adhesive tape; a rubber ring is wound around the lower end of the waterproof adhesive tape, the lower end of the rubber ring is tightly hooped through a hose clamp, the upper end of the rubber ring is in an open shape, and a lower transition plate is welded to the lower portion of the rubber ring; a straight pipe fitting, a bent pipe fitting and an upper transition plate are sequentially welded on the lower transition plate, and a drain valve is mounted on the straight pipe fitting. The plugging device and the plugging method are suitable for the situation that a long crack water leakage point at a large-pipe-diameter stainless steel pipe elbow cannot isolate water drainage or is located at the water adjacent position of a draft tube, the long crack can be reliably and permanently ...

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Номер записи: 2