中開(kāi)雙吸泵@橋東中開(kāi)雙吸泵@中開(kāi)雙吸泵壓力多大
螺栓應(yīng)垂直無(wú)歪斜;地腳螺栓不應(yīng)碰孔底,螺栓上的任一部位離孔壁的距離不得小于15mm。中開(kāi)泵基礎(chǔ)還要考慮工況條件及震動(dòng)因素,必要時(shí)墊加減震墊片。中開(kāi)泵軸在檢修或更換時(shí),如有必要可做探傷檢查。軸磨損后,可用電鍍、噴鍍或涂刷鍍的方法進(jìn)行修復(fù)。軸上鍵槽磨損后,可根據(jù)磨損情況適當(dāng)加大,但只能按標(biāo)準(zhǔn)尺寸增大一級(jí),在結(jié)構(gòu)和受力允許時(shí),可在原鍵槽的90°或120°方向另開(kāi)鍵槽。中開(kāi)泵的葉輪作靜平衡的不平衡重量如大于數(shù)值,則可用去重法從葉輪兩側(cè)切削,切去的厚度應(yīng)不超過(guò)葉輪原壁厚的1/3,切削部件應(yīng)與未切削處平滑相接。如果泵的流量大于工作流量,揚(yáng)程大于工作揚(yáng)程及功率大于軸功率時(shí),那么,在修理時(shí)也可對(duì)葉輪的外徑進(jìn)行切削。中開(kāi)泵葉輪的切削量是有一定限度的,如葉輪周邊切去很多,泵的效率就要降低很多。
運(yùn)行數(shù)據(jù):出口直徑:DN=80~800mm流量:50~11600m3/h(額定點(diǎn))揚(yáng)程:H=7.6~200m(額定點(diǎn))許用工作壓力:≤2.5MPa許用試驗(yàn)壓力:≤3.75MPa介質(zhì):清水或物理化學(xué)性質(zhì)類(lèi)似于清水的其它液體(固體顆?!?0mg/L)。溫度:≤105°C水力經(jīng)優(yōu)化設(shè)計(jì)三水力模型,不僅使泵具有優(yōu)異的水力性能,并且沒(méi)有軸向力(理論上)這一困擾水泵特別是大型水泵運(yùn)行的難題。泵體、泵蓋、葉輪經(jīng)精密鑄造,過(guò)流表面光滑提高了泵的抗汽蝕性能和效率。密封根據(jù)輸送介質(zhì)或用戶(hù)要求采用填料密封或機(jī)械密封,不受轉(zhuǎn)向限制。對(duì)于填料密封,有足夠的空間用于更換填料。jdhuiquan6.21
中開(kāi)雙吸泵@橋東中開(kāi)雙吸泵@中開(kāi)雙吸泵壓力多大
中開(kāi)雙吸泵@橋東中開(kāi)雙吸泵@中開(kāi)雙吸泵壓力多大
雙吸是指泵的方式,從葉輪的兩端進(jìn)水,叫雙吸首先,方式不同雙吸泵主要是介質(zhì)在葉輪兩端,葉輪兩側(cè)各有一個(gè)密封腔而不是泵有兩個(gè)口。雙吸泵的抗氣蝕能力比單吸泵要強(qiáng)由于介質(zhì)在葉輪兩端,會(huì)形成水力對(duì)稱(chēng)這樣雙吸泵的平衡軸向推力作用比單吸泵要好,運(yùn)行起來(lái)更平穩(wěn)而且介質(zhì)的流速較低,葉輪不容易產(chǎn)生氣蝕現(xiàn)象。但是雙吸泵比單吸泵要多一個(gè)密封腔,所以其成本相對(duì)較高,其次,輸送流量要求不同雙吸泵更適合輸送大流量,要求運(yùn)行平穩(wěn)的工況當(dāng)泵的流量要求很高時(shí),如果是單吸泵則要有很大的泵入口和出口口徑,同時(shí),轉(zhuǎn)速不能太大,需穩(wěn)定在1450rmp左右,若采用雙吸泵,泵的尺寸和重量都可以相對(duì)減小,轉(zhuǎn)速也可以提高,容積效率增加。雙吸中開(kāi)泵的拆卸方法:只要拆開(kāi)泵蓋。
工作條件:1. The allowable working pressure is 2.5MPa, that is, the pump inlet pressure + pump lift ≤2.5MPa. According to the maximum pressure under the pump shell, the pump body and pump cover material using gray cast iron (1.6MPa), Ductile iron (2.0MPa), cast steel (2.5MPa). Please indicate the pressure of the pump or the material at the time of ordering.
2. Media: Water with a temperature of ≤105°C or other liquids of physicochemical properties similar to water (solid particles ≤80mg/L). Bearing 1, the use of grease lubrication of closed rolling bearings, simple maintenance, long running time, 2, equipped with a constant oil level oil cup, can also be used dilute oil lubrication;
3, the selection of imported (SKF, NSK, NTN) high-quality bearings, smooth operation, low noise, long service life. Compact structure and good stability.
S, SA series double suction medium open pump for the pump shell open structure, import and export are in the pump body, maintenance only need to hoist the pump cover, rotor parts can be removed for maintenance operations, without the need to disassemble the pipeline, very convenient. According to the need of electric motor (drive) can also be on the left side at the right end, convenient for on-site installation. The structure shortens the axial size of the rotor parts, the steel of the shaft is better, and the operation is more stable and reliable. Equipped with pump body seal ring, and impeller seal ring for optional parts. The sealing ring can be replaced after wear, reducing operating and maintenance costs.
中開(kāi)雙吸泵@橋東中開(kāi)雙吸泵@中開(kāi)雙吸泵壓力多大
水環(huán)泵也有其缺點(diǎn):(1)效率低,一般在30%左右,較好的可達(dá)50%。(2)真空度低。這不僅是因?yàn)槭艿浇Y(jié)構(gòu)上的限制,更重要的是受工作液飽和蒸氣壓的限制??偟恼f(shuō)來(lái),由于水環(huán)泵具有等溫壓縮和用水作封液,可以抽除易燃、易爆及腐蝕性氣體,還可以抽除含有灰塵和水分的氣體等突出優(yōu)點(diǎn),所以得到了廣泛的應(yīng)用。雙吸泵和單吸泵系統(tǒng)區(qū)別:?jiǎn)渭?jí)泵水系統(tǒng)的冷、熱源側(cè)和負(fù)荷側(cè)只用一組循環(huán)水泵,系統(tǒng)簡(jiǎn)單、初投資省,但為了保證冷水機(jī)組的流量恒定,因此不能充分利用輸送管網(wǎng)中的水流量減少所帶來(lái)的輸送能耗降低的好處。雙級(jí)泵水系統(tǒng)中把冷凍水系統(tǒng)分成冷凍水制備和冷凍水輸送兩部分。冷、熱源側(cè)和負(fù)荷側(cè)分別設(shè)置循環(huán)水泵,可以實(shí)現(xiàn)負(fù)荷側(cè)水泵變流量運(yùn)行。
五、型號(hào)意義:
例如:300S58A
300-泵入口直徑(mm)
S-單級(jí)雙吸水平中開(kāi)式離心清水泵
58-設(shè)計(jì)點(diǎn)揚(yáng)程(m)
A-葉輪外徑改變標(biāo)志
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