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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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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2. Отображено 2.
04-04-2023 дата публикации

Fluid line system

Номер: CN115898982A
Автор: QI JIANXIONG, LI XIANYI, CHU FEI, WANG BO, ZHANG HONGJUN, ZHAO CHUNHUI, WANG CHUNCHENG, CHEN PENG, FAN KAIMU
Принадлежит:

The invention provides a fluid pipeline system, relates to the technical field of hydraulic pneumatic control, and can realize that a plurality of executing mechanisms can be controlled to complete telescopic actions by only using two pipelines. The fluid pipeline system comprises a first pipeline and a second pipeline, the first reversing unit is used for enabling the fluid inlet end to be switched between the state of being communicated with the first pipeline or the state of being communicated with the second pipeline; the first pipeline comprises a first branch and a second branch, the first branch and the second branch are used for being connected with one ends of different executing mechanisms respectively, and the first flow direction control unit connected into the first pipeline is used for controlling fluid to flow into the first branch and/or the second branch so as to control the corresponding executing mechanisms to act; the second pipeline comprises a third branch and a fourth ...

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Номер записи: 1
11-07-2023 дата публикации

Variable-contact-length cutting tooth and PDC drill bit

Номер: CN116411814A
Автор: MI KAIFU, LI XIANYI, LIU FENG, ZHANG GUOTIAN, GUO CHEN, ZHAO BO, WANG YUPENG, ZHANG HONGLIN, FAN KAIMU, DU YINGJUN, LI TIEJUN
Принадлежит:

The invention provides a variable-contact-length cutting tooth and a PDC drill bit. The cutting tooth with the variable contact length comprises a base body and a diamond composite layer which are connected with each other, the outer surface of the cutting tooth with the variable contact length comprises two sections of variable contact areas which are symmetrically arranged; the variable contact area comprises a first transition section, a variable contact section and a second transition section which are connected in sequence; the appearance curves of the first transition section, the variable contact section and the second transition section are high-order polynomial curves which are determined according to a preset parameter combination and take the same end point as the origin of coordinates; wherein the preset parameter combination comprises a shape curve coefficient combination determined based on the preset curve transverse width, the preset width range of the variable contact area ...

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Номер записи: 2