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西門子6RA7085-6DS22-0調(diào)速器主板參詳
西門子6RA7085-6DS22-0調(diào)速器主板參詳
西門子6RA7085-6DS22-0調(diào)速器主板參詳
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型號:PS416-CPU-200
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早期瓦特在蒸汽機(jī)上使用的離心調(diào)速器,如圖《離心測速器》所示:當(dāng)蒸汽機(jī)啟動(dòng)后,通過錐齒輪 將轉(zhuǎn)動(dòng)傳動(dòng)到離心調(diào)速器的轉(zhuǎn)軸上,帶動(dòng)連桿機(jī)構(gòu)上的兩個(gè)鋼球1繞轉(zhuǎn)軸轉(zhuǎn)動(dòng),鋼球的慣性令其做離心運(yùn)動(dòng),而彈簧則對兩個(gè)鋼球提供向心力。鋼球的離心運(yùn)動(dòng)帶動(dòng)套筒2向上運(yùn)動(dòng),杠桿3將套的運(yùn)動(dòng)傳遞到蒸汽閥門5,調(diào)節(jié)閥門的開度,而閥門的開度又調(diào)節(jié)了蒸汽進(jìn)給量,調(diào)節(jié)蒸汽機(jī)轉(zhuǎn)速。
在蒸汽機(jī)運(yùn)轉(zhuǎn)過程中,當(dāng)轉(zhuǎn)速超過設(shè)定轉(zhuǎn)速時(shí),彈簧的彈力小于鋼球所需向心力,做離心運(yùn)動(dòng),帶動(dòng)蒸汽閥門,減小開度,進(jìn)氣量降低,蒸汽機(jī)轉(zhuǎn)速降低。當(dāng)蒸汽機(jī)轉(zhuǎn)速小于設(shè)定轉(zhuǎn)速時(shí),彈簧彈力大于鋼球所需向心力,鋼球向轉(zhuǎn)軸靠攏,帶動(dòng)蒸汽閥門增大開度,進(jìn)氣量增大,蒸汽機(jī)轉(zhuǎn)速增加。從而,離心調(diào)速器通過彈簧和鋼球所需的向心力達(dá)到調(diào)節(jié)蒸汽機(jī)轉(zhuǎn)速的目的,令蒸汽機(jī)轉(zhuǎn)速始終保持在一個(gè)穩(wěn)定的設(shè)定值 .