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(2)改變轉(zhuǎn)速的方法：改變皮帶輪外徑或改變齒輪減速器傳動(dòng)比，也可選用不同轉(zhuǎn)速的動(dòng)力機(jī)。

(3)水泵轉(zhuǎn)速改變后，其流量(Q)、揚(yáng)程(H)和功率(N)的變化關(guān)系如下式所示： Q1=Q*n1/n   H1=H*(n1/n)2    N1=N*(n1/n)3

 式中：Q1、H1、N．分別代表轉(zhuǎn)速改變后的流量、揚(yáng)程和功率。 Q、H、N分別代表規(guī)定轉(zhuǎn)速下的流量、揚(yáng)程和功率。

(4)水泵轉(zhuǎn)速提高后，耗用功率增加，吸上真空度降低，壽命縮短。過分提高轉(zhuǎn)速會(huì)發(fā)生其它事故，故應(yīng)慎用。

(5)水泵轉(zhuǎn)速過分降低時(shí)，泵的使用效益低，為此，應(yīng)盡量避免泵在過低轉(zhuǎn)速下運(yùn)行。用戶應(yīng)按性能曲線圖選擇使用。

臥式軸流泵@伊寧臥式軸流泵@150HW-12臥式軸流泵發(fā)貨速度快

hw混流泵傳動(dòng)體例：有直接傳動(dòng)和變速傳動(dòng)。常用動(dòng)力機(jī)時(shí)電念頭和柴油機(jī)。（五）水泵啟動(dòng)運(yùn)行。填料壓得太緊及四周緊。軸套磨損。水泵機(jī)組安裝年夜體可分進(jìn)水管部件安裝，水泵安裝，電機(jī)安裝及水泵，電機(jī)齊心度調(diào)整，出水管安裝四年夜步。該產(chǎn)物功率曲線較平展，且在年夜流量區(qū)呈下降趨向，電機(jī)不會(huì)超功率運(yùn)行。改換相關(guān)鏈接：臥式混流泵機(jī)能參數(shù)及使用利益混流泵與軸流清水離心泵的選用區(qū)別臥式混流泵。出口直徑mmhw——臥式渦殼混流泵８——設(shè)計(jì)揚(yáng)程，ms——變形代號(hào)hw臥式混流泵標(biāo)的目的：向水泵進(jìn)口看，葉輪一般為逆時(shí)針扭轉(zhuǎn)（６５０hw—。軸中心沒有對正。我公司擁有今朝較為完整的檢測設(shè)備及檢測手藝，每臺(tái)設(shè)備出廠均按國家相關(guān)尺度及企業(yè)尺度進(jìn)行檢測。

2、允許吸上真空度[Hs]與必需汽蝕余量[NPSH]r的換算關(guān)系：

 [Hs]≈10-[HPSH]c

 [NPSH]r≈[NPSH]C+0.3

 式中：[Hs]-允許吸上真空度   米

 [NPSH]C-臨界汽蝕余量   米

 [NPSH]r-必需汽蝕余量   米

臥式軸流泵@伊寧臥式軸流泵@150HW-12臥式軸流泵發(fā)貨速度快

 *特征描述

HW 型蝸殼式混流泵是按國家標(biāo)準(zhǔn)系列而設(shè)計(jì)的高節(jié)能產(chǎn)品。其性能指標(biāo)均達(dá)到先進(jìn)水平，省材節(jié)能效果顯著。延伸搜索：水環(huán)真空泵

（一）用途
HW型混流泵為臥式、單級(jí)、單吸、懸臂蝸殼式混流泵，適用于農(nóng)田排灌、工業(yè)、城鎮(zhèn)給排水及船塢、碼頭引水等。延伸搜索：水環(huán)真空泵
（二）特點(diǎn)
體積小、重量輕、流量大、效率高，汽蝕性能好，區(qū)范圍寬廣而平坦，結(jié)構(gòu)簡單，使用管理方法，維修容易。延伸搜索：水環(huán)真空泵
（三）型號(hào)說明
以250HW—8為例：
250—泵進(jìn)（出）水口直徑為250毫米。
8—泵總揚(yáng)長為8米。

（四）水泵的傳動(dòng)方式
我廠生產(chǎn)的HW型系列混流泵均機(jī)（電）兩用，其轉(zhuǎn)動(dòng)方式視各地區(qū)動(dòng)力情況而定，訂貨時(shí)根據(jù)原動(dòng)機(jī)的型號(hào)（功率、轉(zhuǎn)速）確定水泵的傳動(dòng)方式，以定皮帶輪的大小或聯(lián)軸器的規(guī)格。延伸搜索：水環(huán)真空泵
（五）水泵轉(zhuǎn)向：
從水泵進(jìn)水口看葉輪為逆時(shí)針方向旋轉(zhuǎn)（即箭頭所示的方向旋轉(zhuǎn)）。

臥式軸流泵@伊寧臥式軸流泵@150HW-12臥式軸流泵發(fā)貨速度快

可是，由于是立軸，泵的縱向較長，拆卸、拼裝時(shí)吊車的吊裝高度較高，泵的上方要有滿足的空間，這是立式泵的缺點(diǎn)�？墒�，立式泵簡直都安裝在室外，這么就不會(huì)變成疑問。

Instructions for use (i) the HW mixed-flow pump is composed of main parts such as pump body, pump cover, impeller, pump shaft and bearing body. (Ii) The pump cover is a part of the pump connected to the inlet pipe, with a specified axial end gap between the end surface and the impeller (maintaining the specified axial clearance after eliminating the axial activity gap of the bearing). The gap is too small to produce friction, too large will lead to the pump pressure water reflux, so that the pump efficiency is reduced, through the increase or decrease adjustment paper pad to meet the required requirements of the gap. Extended search: Water ring Vacuum Pump (iii) The sealing device is composed of a filler letter, a water seal letter, a filler cover and a lead powder (or oil immersion) asbestos root. Its role is: 1, in the tea to prevent air inhalation pump, play a sealing role. 2. When pumping, prevent water from flowing out of the pump too much along the shaft. (Iv) Shaft application to protect the shaft does not make it directly friction with the filler, if long-term use found that the bushing wear too much, can change the bushing. (V) The two supports of the pump shaft are bearings in the bearing body, and the bearing has an appropriate amount of grease in its body to lubricate the bearings. (Vi) The baffle on the shaft prevents water from flowing into the bearing body along the pump, thus protecting the bearing and extending its service life.