【正文】 ght? 我是否痊愈？Lesson38 Everything except the weather 惟獨(dú)沒有考慮到天氣Olympic City39。 time. As a great many people will be visiting the country, the government will be building new hotels, an immense stadium, and a fine new swimming pool. 39。Lesson37 The Olympic Games 奧林匹克運(yùn)動(dòng)會(huì)s school friends will be waiting for her on the English coast. Among them will be Erna39。T XhI9bFc lr8`l? Ts)y5m%Y3|a d?|39。Js|4UJA1OTt qBI9bP?1|.A:lR3XTs)y5m%Y|a d?t qBjf。 端面跳動(dòng)Z8xbry3M2siN ≥3000 彈性圓柱銷式PPHK39。允許值 固定式允許值 聯(lián)軸器的找正見表下9之規(guī)定：KMM8R,|4P V 轉(zhuǎn)數(shù)固定式聯(lián)軸器上的螺柱孔應(yīng)鉸配；2. 機(jī)械密封裝置的直接冷卻沖洗系統(tǒng)，必須裝有過(guò)濾網(wǎng)，過(guò)濾網(wǎng)應(yīng)完好無(wú)損。軸端密封的冷卻水室應(yīng)無(wú)裂紋、滲漏現(xiàn)象，不得因結(jié)垢，銹蝕等堵塞流通，外部冷卻水系統(tǒng)亦應(yīng)暢通無(wú)阻；!Wk~7W u8V （2）密封的冷卻裝置：（1） 壓蓋緊度適當(dāng)，不得安裝歪斜或與軸磨擦。~；!l,~1j9P5I F1aC （2）C （1）填料密封：.w:MW}Hamp。軸封：fL （八）~。軸承座不得有裂紋及滲漏現(xiàn)象；（2）軸承座：+pa*bNC7rRL （1）；滾動(dòng)軸承的滾子與滑道表面應(yīng)無(wú)腐蝕，坑疤及班點(diǎn)；$j]%HE:Xv9u Y(H? （6）滾動(dòng)軸承拆裝時(shí)使用專用工具，采用熱裝時(shí)，油加熱到100~120℃，嚴(yán)禁用火焰直接加熱；（5）滾動(dòng)軸承的軸向定位尺寸，取泵總裝后轉(zhuǎn)子總竄動(dòng)量的一半；（4）滾動(dòng)軸承（向心球軸承和向心推力軸承），與外殼的配合采用Gc/d；（3）滾動(dòng)軸承（向心球軸承和向心推力軸承）內(nèi)徑小于100mm時(shí)，與軸的配合采用D/gd；當(dāng)內(nèi)徑為100~200mm時(shí)，與軸的配合采用D/gc；Br|4D+Xjr$n （2）滾動(dòng)軸承：（1）軸瓦頂部間隙一般約為軸頸直徑的2/100，；O/WYR[(L3lX 軸頸與下瓦接觸角為60度~90度，接觸面積應(yīng)均勻，色印每平方厘米不得少于2~3點(diǎn)；F2QUD （4）軸瓦合金應(yīng)無(wú)裂紋，脫殼等損傷；（3）HA uv d （2） 平衡盤軸向定位應(yīng)使葉輪與導(dǎo)葉的流道中心結(jié)正。(六)平衡盤裝置：平衡盤與平衡環(huán)的端面接觸應(yīng)良好，接觸面積達(dá)到75%以上；~；261~500r6_5W|
J%jy 平衡盤端面跳動(dòng)121~26050~120平衡盤的端面跳動(dòng)不大于下表8規(guī)定：0F$v
G T |})m 直徑D+T3p6E$`.{9P8o:I}b 261~500軸套、間隔套、葉輪平衡盤徑向跳動(dòng)121~26051~120≤50j_a W8r ＝$s` fI 直徑 轉(zhuǎn)子預(yù)裝后測(cè)量各葉輪口環(huán)處徑跳動(dòng)不大于下表6規(guī)定。~~~110~230鍵槽配合緊力70~11040~70軸頸 軸套、間隔套與軸不能采用同一種材料，以免咬死。Bt6Zi9C1A 葉輪、平衡盤與軸的配合采用D/gd配合；w(Eamp。轉(zhuǎn)子及轉(zhuǎn)子預(yù)裝：（五） yT7W。401~500 靜平衡允差T＜200Q}o4v 葉輪外徑（mm）更換新葉輪時(shí)，須校核靜平衡。],R]*F 輪轂鍵槽以及平衡盤。_ FJk?2U V,L T M 400~1000160~400F{.seT5p^o 60~160T t [5za vw$o 25~60端面跳動(dòng)（不垂直度）$E%p,z2]8tq 10~25葉輪的端面跳動(dòng)不大于下表3規(guī)定：直徑 徑向跳動(dòng)v_39。以兩軸頸圓柱面為基準(zhǔn)，聯(lián)軸節(jié)和軸段的徑向跳動(dòng)不得大于下表2規(guī)定：ku2A[TG 直徑軸頸的不柱度和橢圓度不得大于軸徑的1/2000，表面不得有傷痕，光潔度不低于6級(jí)；泵軸（三） 組裝總聯(lián)接螺栓時(shí)，應(yīng)對(duì)稱進(jìn)行，且用力要均勻。泵段應(yīng)無(wú)裂紋、氣孔或嚴(yán)重砂眼，止口面應(yīng)無(wú)毛剌及碰撞變形，要求接觸面達(dá)到75%以上；M%X%mc0s1p1|$b 有軸向膨脹滑銷的泵，滑銷和銷槽應(yīng)平滑無(wú)毛剌； 泵座與基礎(chǔ)面應(yīng)接觸嚴(yán)密；~.ViKkb | h1Sd 泵華麗：X,~Gc+?.^[ （一） ＜1500 ＜3000端面跳動(dòng)Z8xbry3M2siN ≥3000徑向跳動(dòng) 端面跳動(dòng)徑向跳動(dòng) E8KM 轉(zhuǎn)/分 允許值 允許值聯(lián)軸器的找正見表下9之規(guī)定：KMM8R,|4P V 轉(zhuǎn)數(shù)~1mm，其與圓柱銷的配合應(yīng)帶一定緊力。聯(lián)軸器1.*`[%sr2Rs （九） 壓蓋中活裝的靜環(huán)的端面防轉(zhuǎn)槽根部與防轉(zhuǎn)銷，應(yīng)保持有軸向1~2mm間隙，以防止壓不緊密封卷和蹩勁。與密封圈接觸的表面光潔度不低于6；+kG4RB Q.{
\ （2）機(jī)械密封：（1）`iN*[
R!pb namp。 Oav},}+W9rbamp。 ~，下瓦背與瓦座接觸應(yīng)均勻，接觸面積達(dá)到60%以上，瓦背不許加墊；y o+a _?；瑒?dòng)軸承：（1）軸承部分：Fj jDk1F （七） 261~500r6_5W|
J%jy 平衡盤端面跳動(dòng)121~26050~120 平衡盤的端面跳動(dòng)不大于下表8規(guī)定：0F$v
G T |}＝m 直徑D+T3p6E$`.{9P8o:I}b 261~5000軸套、間隔套、葉輪平衡盤徑向跳動(dòng)121~26051~120 ≤50j_a W8r ＝$s` fI 直徑 轉(zhuǎn)子預(yù)裝后測(cè)量各葉輪口環(huán)處徑跳動(dòng)不大于下表6規(guī)定。~~~110~230鍵槽配合緊力70~110 40~70軸頸 軸套、間隔套兩端面對(duì)于軸線的不垂直度不大于表3規(guī)定。 聯(lián)軸器對(duì)軸的配合采用D/gd配合；a_amp。)3gL5Jy,S 葉輪用去重法進(jìn)行靜平衡，但切去的厚度不得大于壁厚的1/3。rjn 靜平衡允差見表4：C%]$Vfv39。 Namp。 葉輪口環(huán)，輪殼的徑向跳動(dòng)不大于表2規(guī)定。葉輪 （四） 260~500120~260 50~120F]bngR 18~50 ~39。~120~180徑向間隙
a(L/^$,i5vz 80~120導(dǎo)葉口環(huán)與葉輪口環(huán)徑向間隙見下表1之規(guī)定:導(dǎo)葉口環(huán)直徑口環(huán)與導(dǎo)葉的配合采用D/ge；導(dǎo)葉流通部份應(yīng)光潔，導(dǎo)葉與口環(huán)配合部不應(yīng)有嚴(yán)重的通孔，氣蝕等缺陷；H8rqCcI1s 導(dǎo)葉及口環(huán)：（二） 校驗(yàn)壓力表。聯(lián)軸器找正；j$UlD5| （8）檢查和調(diào)整泵體的水平度；（7）_)Nbw2a~ （6） 檢查修理平衡盤與平衡環(huán)的端面接觸，及各段間隙、葉輪輪殼、軸套、平衡盤輪殼、軸肩，緊固螺母的端面接觸情況；g。檢查、調(diào)整各部位間隙及轉(zhuǎn)子的徑向跳動(dòng)端面跳動(dòng)，泵軸彎曲；（3）包括小修內(nèi)容；7W!q(a,\[ （2）大修；（1）清掃并修理冷卻水，油封和潤(rùn)滑系統(tǒng)，更換潤(rùn)滑油（脂）；z1l]%bWH { 檢查轉(zhuǎn)子軸向竄動(dòng)量；Sm?,I^lQ （5）緊固各部位螺栓，消除運(yùn)行中發(fā)生的缺陷和滲漏，更換零件；,]k0w:|3\yr L （4）檢查軸承、調(diào)整各部間隙及校正聯(lián)軸器；（3）更換填料或檢修機(jī)械密封；（2）小修)[（1）檢修內(nèi)容：18~24（二）2~4大修LtnQ3h%N 檢修周期（月）小修 檢修周期：檢修類別檢修周期和檢修內(nèi)容v  H （一）二、編制說(shuō)明0FSamp。Dentists always ask questions when it is impossible for you to answer.多級(jí)離心泵維護(hù)檢修規(guī)程$WKWbN3w*`i} 一、A public house which was recently bought by Mr Ian Thompson is up for sale. Mr Thompson is going to sell it because it is haunted. He told me that he could not go to sleep one night because he heard a strange noise ing from the bar. The next morning, he found that the doors had been blocked by chairs and the furniture had been moved. Though Mr Thompson had turned the lights off before he went to bed, they were on in the morning. He also said that he had found five empty whisky bottles which the ghost must have drunk the night before. When I suggested that some villagers must have e in for a free drink, Mr Thompson shook his head. The villagers have told him that they will not accept the inn even if he gives it away. 230 !When a plane from London arrived at Sydney airport, workers began to unload a number of wooden boxes which contained clothing. No one could account for the fact that one of the boxes was extremely heavy. It suddenly occurred to one of the workers to open up the box. He was astonished at what he found. A man was lying in the box on top of a pile of woollen goods. He was so surprised at being discovered that he did not even try to run away. After he was arrested, the man admitted hiding in the box before the plane left London. He had had a long and unfortable trip, for he had been confined to the wooden box for over ten hours. The man was ordered to pay amp。s money was paid back in this way. The last note said:39。 Only 25 per cent a thief now!39。but only 5o per cent a thief!39。The whole village soon lear