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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)。jdhuiquan717

(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。

臥式灌溉混流泵A宿遷臥式灌溉混流泵信得過的商家

Impeller fixed on the bearing whether there is loosening, if there is cracks and loosening phenomenon to timely maintenance, if the stainless steel horizontal mixed pump impeller above the soil also need to clean up. Stainless steel horizontal mixed flow pump and pipe interface must be well sealed, because if there is debris into the words will be damage to the inside of the stainless steel horizontal mixed flow pump. For stainless steel horizontal mixed-flow pump bearings are also the focus of inspection, after use to check whether the bearing wear, if the stainless steel horizontal mixed pump for a long time if the small ball in the bearing will be broken, so when the stainless steel horizontal mixed pump after use in the bearing is best coated with a layer of lubricating oil better protection pump bearings. The perbance of stainless steel horizontal mixed-flow pump depends not only on the beter index, but is often the result of people using it properly. Summer is here, and the flood season is not far off. In order to complete the drainage in time during the flood season, it is necessary to ensure that the mixed flow pump, axial flow pump and other drainage equipment can operate normally during the drainage period. On this point.

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

 *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)）。

臥式灌溉混流泵A宿遷臥式灌溉混流泵信得過的商家

And the blockage of leaf rotation, etc., should be solved by corresponding measures. (2) pipe leakage or leakage, may be installed when the bolts are not tightened. If the leakage is not serious, you can apply cement slurry in a leaking or leaking place, tighten the nut with the plate hand, and if the leak is serious, reload it. (3) The pump is violently shaken, may be in the electric rotor imbalance, or the coupling combination is not bad, bearing wear, bending, may also be caused by the rotating parts loosening, rupture and pipe bracket is not tight. Adjustments, reinforcement, straightening or replacement should be made depending on the circumstances. In our daily life or in our work, we often use an industrial machinery, we call it a water pump. Many common pump structures are not very complex, but they may often be uncertain in pump selection, especially when we use the pump for the first time. Let's introduce the pump in the end how to choose not to let us time-consuming and laborious. The first step is to let us know the type of pump.
使用說明