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船舶螺旋槳軸及其密封支承裝置設(shè)計-文庫吧資料

2024-08-20 01:38本頁面
  

【正文】 個附加彎矩應(yīng)力。i重力彎矩艉托架軸承支點處的重力彎矩是由螺旋槳和該支點后軸段及螺旋槳固定螺母等的懸臂重量所引起的。這一附加扭矩是船轉(zhuǎn)向時迫使(螺旋槳)降速而產(chǎn)生的附加扭矩隨推進裝置的形式不同而不同。各交變應(yīng)力必須單獨乘以相應(yīng)的應(yīng)力集中系數(shù)。根據(jù)應(yīng)力分析,選擇幾個應(yīng)力較大的“危險截面”進行校核。由于螺旋槳軸、推力軸、中間軸受力情況各有差異,故按規(guī)范計算的軸徑是不同的。軸選用:45鋼回火 毛坯直徑>300~500mm,硬度:162~217 抗拉強度:=560屈服點:=280 彎曲疲勞極限:=225,扭轉(zhuǎn)疲勞極限:=130 許用靜應(yīng)力:224N,需用疲勞應(yīng)力:156~173N 安全系數(shù):k= 軸徑的估算 按有關(guān)規(guī)范確定傳動軸基本軸徑傳動軸的基本軸徑必須嚴(yán)格按有關(guān)規(guī)范確定。 經(jīng)統(tǒng)計:散貨船多用的大側(cè)斜螺旋槳。按經(jīng)驗數(shù)據(jù)附水質(zhì)量約為螺旋槳質(zhì)量的l0%~ 30% 。此外,考慮螺旋槳的附水質(zhì)量。TRT-flex60C 柴油發(fā)動機雖為低速發(fā)動機,輸出功率大,但尺寸和重量過大不宜在中型散貨船上使用。:挪威船級杜 單層散貨船排水量二千八百噸,長度七十八米,寬度十二點六米,吃水深度六點二米 ,船員數(shù)目十八人(包括船長) ,船速十海里。在中間軸的前端布置有剎車裝置和軸的轉(zhuǎn)速傳感裝置。尾軸管用鑄鋼件與無縫鋼管焊接后在與船體焊接。軸承部位鑲有青銅軸套。尾軸的基本軸徑略大于中間軸徑,長度也比中間軸長一些。有的中、小型艦船,布置在舷外的軸系較短螺旋槳軸和尾軸做成一個整體,不再分成兩段,統(tǒng)稱為尾軸。它包括噴水推進器、平旋推進器、舵式推進器和吊艙式推進裝置。中速和高速柴油機推進裝置在大多數(shù)情況下安裝可調(diào)螺距螺旋槳,可調(diào)螺距螺旋槳現(xiàn)在的使用范圍可以涵蓋所有的功率和轉(zhuǎn)速。過去幾年蒸汽輪機和燃氣輪機只占13%。就已交付使用的新建船舶上裝機總功率而言,低速柴油機所占份額,在過去20年期間已從60%左右穩(wěn)步增長到接近80%。此外,還存在柴電或燃電推進裝置。只有考慮了它們的組合,而且整個系統(tǒng)配置為最佳時,船舶推進系統(tǒng)才稱得上成本合理。為了保護環(huán)境還必須限制主、輔機排氣和各種廢料所造成的污染。船舶推進裝置對船舶營運的經(jīng)濟性起著決定性的作用。 Seal pletely 言 引言從20世紀(jì)80年代起,我國船舶業(yè)埋頭苦干,從引進先進技術(shù)到自主開發(fā),從借助境外渠道努力開拓國際市場,到扎扎實實提高競爭力,從90年代排名17追到當(dāng)今世界第三,時至今日我國造船業(yè)在真刀真槍的國際競爭中打開了一條生路。 Propeller stalk。( inside of reason)It is the dint function( the exterior reason) to is a stalk the next in order outside be subjected to in the operation excrescent. The stalk fasten usually outside inside the prehensive function of the factor takes place the breakdown.The tail stalk tube seals pletely various different technique solution. Use the single work (make) structure on the boat in the majority, A stalk of tail seals to protect the tail stalk tube not to enter the sea water. The tail stalk tube inside press to be decided by the ships to drink water, the tail stalk takes care of inside the oil of 充 , jack up the fuel tank and can regulate hydraulicpneumatic, make of high in exterior water pressure.Fasten according to the ships stalk of is physically consider by the dint circumstance, the influence of some misty factors after, discuss the stalk department to turn round to vibrate to use in response to the calculation method of the dint. Pass the calculation result can see, is viable with the method. Adoption faintness after is excellent turn to adjudicate the method considered the stalk department design, process, use some objective and misty factors within processes and the person39。 密封 AbstractThe ships stalk mainly fasten from spread to move the stalk (push the dint stalk, in the center stalk, the propeller stalk...etc.) The and spread to move the equipments ( the Con
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