東莞淬火與回火調質硬度洛氏硬度計誤差
洛(luo)氏(shi)硬(ying)(ying)(ying)(ying)(ying)度(du)(du)計(ji)檢(jian)定(ding)中常見各種誤差(cha)(cha)及處理方法:壓(ya)(ya)(ya)頭(tou)的(de)影(ying)響:(1)金剛石壓(ya)(ya)(ya)頭(tou)不(bu)符合技(ji)術要求(qiu)或是使用一(yi)段(duan)時(shi)間后有磨損,操(cao)(cao)作者如不(bu)能判斷(duan)金剛石的(de)好(hao)壞,可(ke)由(you)計(ji)量測試(shi)(shi)機構進行檢(jian)定(ding)。(2)鋼(gang)球(qiu)壓(ya)(ya)(ya)頭(tou)強度(du)(du)和硬(ying)(ying)(ying)(ying)(ying)度(du)(du)不(bu)夠,容易(yi)產生變形。鋼(gang)球(qiu)扳壓(ya)(ya)(ya)扁產生長(chang)久變形后呈橢圓(yuan),短(duan)軸垂(chui)(chui)直(zhi)于(yu)零件表面(mian)時(shi),壓(ya)(ya)(ya)痕淺,示值(zhi)高(gao);長(chang)軸垂(chui)(chui)直(zhi)于(yu)零件表面(mian)時(shi),壓(ya)(ya)(ya)痕加深,示值(zhi)降(jiang)低(di),鋼(gang)球(qiu)允差(cha)(cha)小0.002mm。人為誤差(cha)(cha):(1)操(cao)(cao)作人員技(ji)術熟練(lian)程度(du)(du)不(bu)夠,實踐經驗較差(cha)(cha),應由(you)熟悉硬(ying)(ying)(ying)(ying)(ying)度(du)(du)計(ji)的(de)人員使用;(2)洛(luo)氏(shi)硬(ying)(ying)(ying)(ying)(ying)度(du)(du)計(ji)加荷(he)(he)過快,持荷(he)(he)時(shi)間短(duan),低(di)硬(ying)(ying)(ying)(ying)(ying)度(du)(du)的(de)零件硬(ying)(ying)(ying)(ying)(ying)度(du)(du)偏高(gao),而加荷(he)(he)過慢(man),持荷(he)(he)時(shi)間長(chang),硬(ying)(ying)(ying)(ying)(ying)度(du)(du)偏低(di),操(cao)(cao)作時(shi)加荷(he)(he)應平整,保持一(yi)定(ding)加荷(he)(he)時(shi)間。洛(luo)氏(shi)硬(ying)(ying)(ying)(ying)(ying)度(du)(du)計(ji)應用與試(shi)(shi)樣硬(ying)(ying)(ying)(ying)(ying)度(du)(du)值(zhi)接近的(de)標準(zhun)硬(ying)(ying)(ying)(ying)(ying)度(du)(du)塊校機,使得(de)試(shi)(shi)驗結果更為可(ke)靠。東(dong)莞淬火與回火調質硬(ying)(ying)(ying)(ying)(ying)度(du)(du)洛(luo)氏(shi)硬(ying)(ying)(ying)(ying)(ying)度(du)(du)計(ji)誤差(cha)(cha)
洛(luo)氏(shi)(shi)硬(ying)(ying)(ying)度(du)(du)(du)計(ji)(ji)的(de)(de)(de)(de)維(wei)護(hu):1.所有(you)(you)工(gong)作平臺的(de)(de)(de)(de)基面和支撐面應(ying)(ying)清潔(jie)光滑,且不應(ying)(ying)有(you)(you)麻上(shang)(shang)現象應(ying)(ying)停(ting)止(zhi)使用。如果壓(ya)頭(tou)為碳化(hua)鎢鋼(gang)球時(shi),球體表(biao)面應(ying)(ying)拋光無缺陷(xian),鋼(gang)球突出(chu)球套(tao)應(ying)(ying)不小(xiao)(xiao)于(yu)鋼(gang)球直徑的(de)(de)(de)(de)三(san)分之一。2.由于(yu)硬(ying)(ying)(ying)度(du)(du)(du)計(ji)(ji)在使用中(zhong)還受到環(huan)境(jing)溫度(du)(du)(du)、磁場、人員、試樣等(deng)因素的(de)(de)(de)(de)影響,還會出(chu)現以上(shang)(shang)沒(mei)有(you)(you)列(lie)舉(ju)的(de)(de)(de)(de)現象,那么在以后的(de)(de)(de)(de)實際工(gong)作中(zhong),通過具體故障分析,洛(luo)氏(shi)(shi)硬(ying)(ying)(ying)度(du)(du)(du)計(ji)(ji)較終找(zhao)出(chu)合理解(jie)決(jue)(jue)辦(ban)法解(jie)決(jue)(jue),并(bing)及時(shi)進行匯(hui)總(zong)保存,便(bian)于(yu)以后能夠及時(shi)迅速(su)查找(zhao)故障并(bing)準確排(pai)除(chu)。其它型號的(de)(de)(de)(de)洛(luo)氏(shi)(shi)和表(biao)面洛(luo)氏(shi)(shi)硬(ying)(ying)(ying)度(du)(du)(du)計(ji)(ji)的(de)(de)(de)(de)常見故障可參照本(ben)文的(de)(de)(de)(de)方(fang)法進行排(pai)除(chu)。佛山日(ri)本(ben)生產洛(luo)氏(shi)(shi)硬(ying)(ying)(ying)度(du)(du)(du)計(ji)(ji)生產廠(chang)家洛(luo)氏(shi)(shi)硬(ying)(ying)(ying)度(du)(du)(du)計(ji)(ji)鑒(jian)別(bie)試件(jian)較小(xiao)(xiao)厚度(du)(du)(du)和測定(ding)試驗的(de)(de)(de)(de)環(huan)境(jing)溫度(du)(du)(du)。
洛氏硬(ying)(ying)(ying)度計適用于(yu)(yu)(yu)對成批加工的(de)成品(pin)(pin)或半(ban)成品(pin)(pin)工件(jian)(jian)(jian)進行逐件(jian)(jian)(jian)檢(jian)測。洛氏硬(ying)(ying)(ying)度計可測試(shi)淬火、表面淬火鋼(gang),調質(zhi)、退(tui)火鋼(gang),冷硬(ying)(ying)(ying)鑄件(jian)(jian)(jian),可鍛(duan)鑄件(jian)(jian)(jian),硬(ying)(ying)(ying)質(zhi)合金(jin)(jin)鋼(gang),鋁(lv)合金(jin)(jin),軸承(cheng)鋼(gang),硬(ying)(ying)(ying)化薄鋼(gang)板的(de)硬(ying)(ying)(ying)度。布氏硬(ying)(ying)(ying)度計則適用于(yu)(yu)(yu)硬(ying)(ying)(ying)度較(jiao)高的(de)工件(jian)(jian)(jian)的(de)硬(ying)(ying)(ying)度測試(shi),還可用于(yu)(yu)(yu)鑄件(jian)(jian)(jian)、鍛(duan)件(jian)(jian)(jian)、供貨狀態的(de)鋼(gang)材、有色金(jin)(jin)屬及經過調質(zhi)熱(re)處理的(de)半(ban)成品(pin)(pin)鋼(gang)鐵工件(jian)(jian)(jian)。布氏硬(ying)(ying)(ying)度計多用于(yu)(yu)(yu)原材料和(he)半(ban)成品(pin)(pin)的(de)檢(jian)測,由于(yu)(yu)(yu)壓痕(hen)較(jiao)大,一般不用于(yu)(yu)(yu)成品(pin)(pin)檢(jian)測。它的(de)試(shi)驗數據穩定,精(jing)度高于(yu)(yu)(yu)洛氏,其缺點壓痕(hen)較(jiao)大,成品(pin)(pin)檢(jian)驗困難,試(shi)驗過程比洛氏試(shi)驗復雜,測量操作(zuo)和(he)壓痕(hen)測量都較(jiao)費時。
洛氏(shi)硬(ying)(ying)度(du)(du)計(ji)(ji)長期使(shi)用后應注(zhu)意些1、硬(ying)(ying)度(du)(du)計(ji)(ji)長時間不(bu)(bu)使(shi)用時,應用防塵(chen)罩將機(ji)器蓋好。2、定(ding)期在(zai)(zai)(zai)絲(si)(si)杠與(yu)手輪(lun)的(de)(de)(de)(de)接觸(chu)面(mian)注(zhu)入少量機(ji)油。3、硬(ying)(ying)度(du)(du)計(ji)(ji)使(shi)用前,應將絲(si)(si)杠頂面(mian)和工作臺上端面(mian)擦凈(jing)。4、定(ding)期在(zai)(zai)(zai)絲(si)(si)杠與(yu)手輪(lun)的(de)(de)(de)(de)接觸(chu)面(mian)注(zhu)入少量機(ji)油。5、當標(biao)準(zhun)硬(ying)(ying)塊(kuai)支(zhi)承面(mian)有(you)毛刺時應用油石打(da)光(guang),在(zai)(zai)(zai)其不(bu)(bu)同(tong)位(wei)置(zhi)(zhi)試(shi)(shi)驗時,硬(ying)(ying)塊(kuai)應在(zai)(zai)(zai)工作臺上拖動,不(bu)(bu)應拿離工作臺。6、在(zai)(zai)(zai)進行硬(ying)(ying)度(du)(du)檢測(ce)(ce)的(de)(de)(de)(de)過(guo)程(cheng)中(zhong),有(you)關的(de)(de)(de)(de)裝置(zhi)(zhi)是(shi)(shi)不(bu)(bu)應該受到沖擊和振動的(de)(de)(de)(de),以免對操(cao)作造成影響。7、當硬(ying)(ying)度(du)(du)計(ji)(ji)在(zai)(zai)(zai)進行硬(ying)(ying)度(du)(du)檢測(ce)(ce)時,必須(xu)保證(zheng)檢測(ce)(ce)力的(de)(de)(de)(de)方向與(yu)試(shi)(shi)樣(yang)的(de)(de)(de)(de)檢測(ce)(ce)面(mian)垂(chui)直。一(yi)定(ding)要觀察(cha)仔細,看他們是(shi)(shi)否垂(chui)直。8、在(zai)(zai)(zai)任何情況下(xia),不(bu)(bu)允許壓(ya)頭(tou)與(yu)試(shi)(shi)臺及(ji)支(zhi)座(zuo)、試(shi)(shi)樣(yang)觸(chu)碰。要保證(zheng)試(shi)(shi)樣(yang)支(zhi)撐(cheng)面(mian)、洛氏(shi)硬(ying)(ying)度(du)(du)計(ji)(ji)支(zhi)座(zuo)和試(shi)(shi)臺工作面(mian)上不(bu)(bu)得有(you)壓(ya)痕。在(zai)(zai)(zai)進行檢測(ce)(ce)時,應該應均勻平穩(wen)地施加(jia)檢測(ce)(ce)力,不(bu)(bu)能猛然的(de)(de)(de)(de)就加(jia)檢測(ce)(ce)力,那(nei)樣(yang)會造成沖擊與(yu)振動。洛氏(shi)硬(ying)(ying)度(du)(du)計(ji)(ji)壓(ya)頭(tou)與(yu)試(shi)(shi)驗力的(de)(de)(de)(de)不(bu)(bu)同(tong)組合。
洛(luo)氏(shi)硬(ying)(ying)度(du)(du)(du)計(ji)數顯(xian)(xian)式洛(luo)氏(shi)硬(ying)(ying)度(du)(du)(du)計(ji)操(cao)作步驟(zou),數顯(xian)(xian)洛(luo)氏(shi)硬(ying)(ying)度(du)(du)(du)計(ji):分(fen)兩種,初始試(shi)(shi)驗力(li)(li)(li)手(shou)動(dong)(dong)加載(zai)(zai);主試(shi)(shi)驗力(li)(li)(li)自(zi)(zi)動(dong)(dong)加載(zai)(zai)、自(zi)(zi)動(dong)(dong)保(bao)(bao)荷(he)、自(zi)(zi)動(dong)(dong)卸(xie)載(zai)(zai);操(cao)作步驟(zou):壓頭(tou)和樣品接觸,光(guang)標到“OK”處(chu),自(zi)(zi)動(dong)(dong)加載(zai)(zai)、自(zi)(zi)動(dong)(dong)保(bao)(bao)荷(he)、自(zi)(zi)動(dong)(dong)卸(xie)載(zai)(zai),自(zi)(zi)動(dong)(dong)顯(xian)(xian)示(shi)(shi)硬(ying)(ying)度(du)(du)(du)值(zhi)(zhi),分(fen)辨率(lv)0.1HR;初始試(shi)(shi)驗力(li)(li)(li)自(zi)(zi)動(dong)(dong)加載(zai)(zai);主試(shi)(shi)驗力(li)(li)(li)自(zi)(zi)動(dong)(dong)加載(zai)(zai)、自(zi)(zi)動(dong)(dong)保(bao)(bao)荷(he)、自(zi)(zi)動(dong)(dong)卸(xie)載(zai)(zai);操(cao)作步驟(zou):壓頭(tou)和樣品間距0.5mm是,按下“加載(zai)(zai)鍵”,壓頭(tou)自(zi)(zi)動(dong)(dong)下降,自(zi)(zi)動(dong)(dong)加載(zai)(zai)、自(zi)(zi)動(dong)(dong)保(bao)(bao)荷(he)、自(zi)(zi)動(dong)(dong)卸(xie)載(zai)(zai),壓頭(tou)自(zi)(zi)動(dong)(dong)提升(sheng),自(zi)(zi)動(dong)(dong)顯(xian)(xian)示(shi)(shi)硬(ying)(ying)度(du)(du)(du)值(zhi)(zhi),分(fen)辨率(lv)0.1HR。洛(luo)氏(shi)硬(ying)(ying)度(du)(du)(du)計(ji)成為三(san)種較(jiao)常用的硬(ying)(ying)度(du)(du)(du)檢(jian)測法之(zhi)一。長春HRC洛(luo)氏(shi)硬(ying)(ying)度(du)(du)(du)計(ji)直銷廠家
洛(luo)氏(shi)硬度試驗采用(yong)三種試驗力,5種壓頭,它們共(gong)有15種組合。東莞淬火與回火調(diao)質硬度洛(luo)氏(shi)硬度計誤差
全自(zi)(zi)動(dong)(dong)(dong)(dong)數(shu)顯洛氏(shi)(shi)硬(ying)度計(ji)(ji),特點:自(zi)(zi)動(dong)(dong)(dong)(dong)升降(jiang)絲杠、自(zi)(zi)動(dong)(dong)(dong)(dong)選擇試(shi)驗(yan)力(li)、自(zi)(zi)動(dong)(dong)(dong)(dong)加(jia)載(zai)(zai)初試(shi)驗(yan)力(li)、自(zi)(zi)動(dong)(dong)(dong)(dong)加(jia)載(zai)(zai)主試(shi)驗(yan)力(li),自(zi)(zi)動(dong)(dong)(dong)(dong)卸載(zai)(zai)、自(zi)(zi)動(dong)(dong)(dong)(dong)顯示硬(ying)度計(ji)(ji),操作(zuo)步驟:一鍵式操作(zuo):按啟動(dong)(dong)(dong)(dong)鍵,工(gong)作(zuo)臺自(zi)(zi)動(dong)(dong)(dong)(dong)上升,樣品觸碰到壓頭(tou)后自(zi)(zi)動(dong)(dong)(dong)(dong)加(jia)載(zai)(zai),自(zi)(zi)動(dong)(dong)(dong)(dong)卸載(zai)(zai),自(zi)(zi)動(dong)(dong)(dong)(dong)顯示硬(ying)度值(zhi)。(工(gong)作(zuo)臺自(zi)(zi)動(dong)(dong)(dong)(dong)升降(jiang)(沒有高度限(xian)制(zhi)),無(wu)需(xu)人工(gong)轉動(dong)(dong)(dong)(dong)絲桿旋輪。快(kuai)速(su)測量洛氏(shi)(shi)硬(ying)度計(ji)(ji),洛氏(shi)(shi)硬(ying)度計(ji)(ji)特點:4秒顯示硬(ying)度值(zhi);對(dui)工(gong)件(jian)表面(mian)要求低,不用(yong)去氧化(hua)皮即(ji)可測量;帶夾緊(jin)裝置,不用(yong)輔助(zhu)支撐,可自(zi)(zi)動(dong)(dong)(dong)(dong)夾緊(jin)長軸工(gong)件(jian)。東(dong)莞(guan)淬火與回火調質硬(ying)度洛氏(shi)(shi)硬(ying)度計(ji)(ji)誤(wu)差
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長寧區醉百蘇(su)精釀啤酒批發廠家
精釀(niang)啤酒(jiu)(jiu)屋的(de)(de)(de)獨(du)(du)特(te)之(zhi)處獨(du)(du)特(te)的(de)(de)(de)風(feng)味(wei):精釀(niang)啤酒(jiu)(jiu)屋注(zhu)重使用不同種類的(de)(de)(de)麥芽、酵母(mu)和啤酒(jiu)(jiu)花(hua),通過獨(du)(du)特(te)的(de)(de)(de)釀(niang)造工藝,打造出(chu)千變萬化的(de)(de)(de)風(feng)味(wei)。你可(ke)以品嘗到果香、花(hua)香、咖啡香等(deng)各種風(feng)味(wei)的(de)(de)(de)啤酒(jiu)(jiu),滿足味(wei)蕾的(de)(de)(de)探(tan)索欲望。個性化的(de)(de)(de)體 。
半導(dao)體錫膏(gao)的(de)作(zuo)用(yong)原理(li)連(lian)接作(zuo)用(yong)半導(dao)體錫膏(gao)的(de)主要作(zuo)用(yong)是連(lian)接電子元件和(he)印制電路(lu)板。在(zai)制造過(guo)程中(zhong),芯片和(he)引腳需要與基板和(he)焊(han)(han)盤進行(xing)焊(han)(han)接,以實現電路(lu)的(de)連(lian)接。錫膏(gao)作(zuo)為焊(han)(han)接材料,其熔點低(di)于焊(han)(han)接溫(wen)度(du),因此在(zai)焊(han)(han)接過(guo)程中(zhong)能 。
直(zhi)齒輪是機械(xie)傳(chuan)動領(ling)(ling)域(yu)中(zhong)常見的(de)零件之一,廣泛(fan)應用于各種工(gong)業領(ling)(ling)域(yu)。直(zhi)齒輪具有結構(gou)簡單、傳(chuan)動效率高、使(shi)用壽命長等特(te)點,在變(bian)速器和(he)減速器等設備中(zhong)發揮著(zhu)關鍵(jian)作用。本文將詳細(xi)介(jie)紹(shao)直(zhi)齒輪的(de)使(shi)用工(gong)作原理及特(te)點。直(zhi)齒輪 。
當熱點區域的溫(wen)(wen)度(du)超過設備(bei)可(ke)承受的溫(wen)(wen)度(du),就(jiu)有可(ke)能會影響到(dao)電子器件(jian)的性能和(he)壽(shou)命。為了解(jie)決這一問題,可(ke)以在(zai)(zai)主要元件(jian)和(he)散(san)熱器之間涂(tu)上一層薄薄的硅(gui)(gui)脂(zhi)。在(zai)(zai)兩個表面(mian)之間填充硅(gui)(gui)脂(zhi)之后,它可(ke)以在(zai)(zai)高(gao)溫(wen)(wen)環(huan)境下形(xing)成一個具有導 。
快(kuai)速燙(tang)鉆,提(ti)升(sheng)包裝質量在包裝行業中,燙(tang)鉆是一種常見的(de)裝飾工藝(yi),可以為產(chan)品包裝增添獨(du)特的(de)美感(gan)和質感(gan)。為了提(ti)高包裝質量和生產(chan)效率,許多企業開始(shi)采用快(kuai)速燙(tang)鉆技(ji)術。快(kuai)速燙(tang)鉆技(ji)術采用先進的(de)燙(tang)鉆設備和高效的(de)工藝(yi)流 。
要(yao)在生(sheng)產(chan)中提(ti)高支撐座(zuo)的產(chan)量和(he)質量,需要(yao)從以(yi)(yi)下幾個(ge)方面入手:1.優化(hua)生(sheng)產(chan)流(liu)程(cheng):通過(guo)對(dui)生(sheng)產(chan)流(liu)程(cheng)的優化(hua),可以(yi)(yi)減少生(sheng)產(chan)過(guo)程(cheng)中的浪費(fei)和(he)瓶(ping)頸,提(ti)高生(sheng)產(chan)效率和(he)產(chan)量。例如(ru),采用自(zi)動(dong)化(hua)生(sheng)產(chan)線、優化(hua)物料配送等方式,可以(yi)(yi)減 。
小(xiao)字(zi)(zi)(zi)符噴(pen)(pen)(pen)碼機在中(zhong)文(wen)(wen)噴(pen)(pen)(pen)印(yin)功能(neng)方面也非常強大,可以(yi)(yi)實現精確的(de)(de)漢字(zi)(zi)(zi)噴(pen)(pen)(pen)印(yin)。小(xiao)字(zi)(zi)(zi)符噴(pen)(pen)(pen)碼機通常支持中(zhong)文(wen)(wen)字(zi)(zi)(zi)符集(ji),包括(kuo)簡體(ti)中(zhong)文(wen)(wen)、繁體(ti)中(zhong)文(wen)(wen)以(yi)(yi)及一(yi)些特(te)殊的(de)(de)漢字(zi)(zi)(zi)編碼。使(shi)用(yong)小(xiao)字(zi)(zi)(zi)符噴(pen)(pen)(pen)碼機進行中(zhong)文(wen)(wen)噴(pen)(pen)(pen)印(yin)時,您可以(yi)(yi)將需要噴(pen)(pen)(pen)印(yin)的(de)(de)漢字(zi)(zi)(zi)信 。
在液壓轉(zhuan)向系統中,如(ru)車(che)輪的(de)(de)劇(ju)烈跳動(dong)和遇到坑洼(wa)路(lu)面(mian)導致輪胎出(chu)現非自主的(de)(de)轉(zhuan)向時,可(ke)以(yi)通過液壓對活塞的(de)(de)作(zuo)用(yong)能夠很好的(de)(de)緩沖和吸收震(zhen)動(dong),使傳遞到方向盤上的(de)(de)震(zhen)動(dong)減少。機械液壓助力技(ji)術成熟(shu)穩定,可(ke)靠性高,應用(yong)普遍(bian)。 。
多(duo)媒體(ti)是(shi)指(zhi)是(shi)指(zhi)人們用于(yu)傳播(bo)和表示各種信息(xi)的手段。在現如今,多(duo)媒體(ti)隨(sui)著網絡技術的發達(da)以及互聯(lian)網內(nei)容(rong)的豐(feng)富(fu),出現了多(duo)學科(ke)交匯,順應(ying)信息(xi)時(shi)代的需要,促(cu)進和推動新產業的形成和發展(zhan),多(duo)領域應(ying)用等特點。多(duo)媒體(ti)講臺 。
分(fen)時(shi)(shi)主機能(neng)提供哪(na)些優勢?首(shou)先,分(fen)時(shi)(shi)主機可以提高計(ji)(ji)算(suan)(suan)資源(yuan)的(de)(de)利用(yong)(yong)(yong)(yong)率。在傳統的(de)(de)單用(yong)(yong)(yong)(yong)戶計(ji)(ji)算(suan)(suan)機中,當用(yong)(yong)(yong)(yong)戶不使(shi)(shi)用(yong)(yong)(yong)(yong)計(ji)(ji)算(suan)(suan)機時(shi)(shi),計(ji)(ji)算(suan)(suan)資源(yuan)將(jiang)處于閑置狀態。而在分(fen)時(shi)(shi)主機中,多個用(yong)(yong)(yong)(yong)戶可以同時(shi)(shi)使(shi)(shi)用(yong)(yong)(yong)(yong)計(ji)(ji)算(suan)(suan)資源(yuan),從而提高了計(ji)(ji)算(suan)(suan)資源(yuan)的(de)(de) 。
小型風(feng)(feng)力發電是一種(zhong)利(li)用風(feng)(feng)能(neng)(neng)將(jiang)其轉化為電能(neng)(neng)的(de)方(fang)式。它通(tong)常(chang)由以下幾(ji)個主要組(zu)件組(zu)成(cheng):風(feng)(feng)輪(lun):風(feng)(feng)輪(lun)是將(jiang)風(feng)(feng)能(neng)(neng)轉化為機(ji)(ji)械能(neng)(neng)的(de)關(guan)鍵部(bu)分。它通(tong)常(chang)由多個葉(xie)片(pian)組(zu)成(cheng),當風(feng)(feng)吹(chui)過時,風(feng)(feng)輪(lun)開始旋轉。發電機(ji)(ji):發電機(ji)(ji)負責將(jiang)風(feng)(feng)輪(lun)的(de)機(ji)(ji)械能(neng)(neng) 。