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產(chǎn)品名稱： GFB/GFT系列回轉(zhuǎn)行星齒輪減速機(jī)
基本參數(shù)： 10
產(chǎn)品介紹：
GFB/GFT系列回轉(zhuǎn)行星齒輪減速機(jī):行星減速機(jī)系列采用德國(guó)技術(shù)，具有體積小、重量輕、傳遞扭矩大、起動(dòng)平穩(wěn)、低損耗、效率高、性能安全可靠、安裝方式多樣等優(yōu)點(diǎn)，可配電動(dòng)馬達(dá)或液壓馬達(dá)，內(nèi)部可安裝具有壓力釋放裝置的液壓多盤式停車制動(dòng)系統(tǒng)。
GFB/GFT系列回轉(zhuǎn)行星齒輪減速機(jī)：具有廣泛通用性的新性減速機(jī)，內(nèi)部齒輪采用20CvMnT滲碳淬火和磨齒。在建筑工程機(jī)械，煤炭洗選，濃縮設(shè)備而設(shè)計(jì)速比相對(duì)較大的系列新產(chǎn)品，特別適合中心和周邊傳動(dòng)的濃縮機(jī)使用，還可以港口吊車，建筑塔吊使用。負(fù)載啟動(dòng)性能比遠(yuǎn)有的電動(dòng)機(jī)加擺線針輪減速機(jī)的方案要提高很多，長(zhǎng)時(shí)間運(yùn)轉(zhuǎn)齒輪箱不發(fā)熱，噪音非常低并且可以替代國(guó)外相同類型的行星減速機(jī)。該類型減速機(jī)為適應(yīng)客戶要求設(shè)計(jì)了兩種輸出法蘭形式，以適應(yīng)不同工況要求。
參數(shù)：
輸出轉(zhuǎn)速：大減速比i=190
輸出轉(zhuǎn)矩：靜態(tài)扭矩2400KNM
電機(jī)功率：可選配液壓馬達(dá)A6V或A2F系列
應(yīng)用：
塔式起重機(jī)的、建筑工程機(jī)械、起重、挖掘、運(yùn)輸、建筑等行業(yè)。
10.1.3 斷路器的分類
型號(hào)特征 額定斷流容量，MVA
S─少油斷路器 額定電流，A
D─多油斷路器 派生標(biāo)志
K─空氣斷路器 C─帶有手車裝置
Q─產(chǎn)氣斷路器 G─改進(jìn)型
Z─真空斷路器 D─帶有電磁操作結(jié)構(gòu)
L─六氟化硫斷路器 Ⅰ、Ⅱ、Ⅲ─斷流容量
C─磁吹斷路器 額定電壓，kV
安裝條件 設(shè)計(jì)序號(hào)
N─戶內(nèi)
W─戶外
1．多油斷路器：利用絕緣油作為滅弧介質(zhì)、相間及相對(duì)地絕緣介質(zhì)。
2．少油斷路器：絕緣油只作滅弧介質(zhì)。載流部分是借空氣和陶器絕緣材料或有機(jī)絕緣材料來(lái)絕緣，滅弧方式多為橫向吹動(dòng)電弧。
3．空氣斷路器：利用壓縮空氣的吹動(dòng)來(lái)熄滅電弧的。和控制斷路器的分合闡動(dòng)作。
4．SF6斷路器：用SF6氣體作絕緣和滅弧介質(zhì)。
5．磁吹式斷路器：當(dāng)電弧電流通過吹弧線圈以產(chǎn)生磁束來(lái)吹弧及消弧。
6．真空斷路器：利用真空滅弧和絕緣，滅弧時(shí)間一般只有半個(gè)周波。
10.2 斷路器的主要性能與參數(shù)
1．額定電壓及額定電流
（1）額定電壓
指斷路器長(zhǎng)期工作的標(biāo)準(zhǔn)電壓（對(duì)三相系統(tǒng)指線電壓）。電力系統(tǒng)在運(yùn)行中允許有±5％的波動(dòng)，斷路器必須適應(yīng)在電壓變化范圍內(nèi)能長(zhǎng)期工作，為此斷路器出廠時(shí)都以高工作電壓進(jìn)行鑒定。如：對(duì)3～220kV范圍內(nèi)，其高工作電壓較額定電壓約高15％左右；對(duì)330kV以上，規(guī)定高工作電壓較額定電壓高10%。
2）額定電流
指在額定頻率下長(zhǎng)期通過此電流時(shí)，斷路器無(wú)損傷，且各部分發(fā)熱不超過長(zhǎng)期工作時(shí)高允許發(fā)熱溫度。
我國(guó)規(guī)定額定電流為：200、400、630、（1000）、1250、1600、（1500）、2000、3150、4000、5000、6300、8000、10000、12500、16000、20000A。
額定開斷電流和額定斷流容量
（1）斷路器在開斷操作時(shí)，首先起弧的某相電流稱為開斷電流。在額定電壓下，能保證正常開斷的大短路電流稱為額定開斷電流。它是標(biāo)志斷路器開斷能力的一個(gè)重要參數(shù)。
我國(guó)規(guī)定額定開斷電流為：1.6、3.15、6.3、8、10、12.5、16、20、25、31.5、40、50、63、80、100kA等。
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