混流泵

水泵的傳動(dòng)方式

         我廠生產(chǎn)的HW型系列混流泵均可用柴油機(jī)、電機(jī)帶動(dòng)，其傳動(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，以確定皮帶輪的大小或聯(lián)軸器的規(guī)格。

 IV.    Drive Mode of Pump

       Our HW

seriel mixed-flow pump can be driven by diesel engine and motor.The drive mode

can be chosen according to the local motive power situation. When placing an

order for the pump, we should decide the drive mode of the pump according to

the prime motor type(power, rotate speed) in order to confirm the size of

pulley or coupling.

（二）開車前準(zhǔn)備：

1、檢查地腳螺栓的堅(jiān)固情況。

2、檢查傳動(dòng)皮帶松緊程度及安裝設(shè)備是否安裝妥善。

3、檢查進(jìn)、出水管是否進(jìn)氣、漏水。

4、檢查填料松緊是否適宜。

5、檢查電動(dòng)機(jī)和水泵軸心線是否在同一直線上，直聯(lián)時(shí)，電動(dòng)機(jī)旋轉(zhuǎn)方向是否符合泵的旋轉(zhuǎn)方向。

6、檢查泵內(nèi)有無障礙，軸是否卡住，用手轉(zhuǎn)動(dòng)應(yīng)輕無雜音。

II. Preparation Before Starting

1. Check the foundation bolts if they are firm.

2. Check the degree of tightness of drive belt and check the

installation if it is suitable.

3.Check the water–in and outpipes if they are leaking water and air.

4.Check the degeree of tightness of padding if it is suitable.

    5.Check the

motor and pump axile lead if they are in the same line and check the direction

of rotation of motor if it is the same with the rotation direction of pump.

    6.Check the

pump if there are barriers , if the axile locks, there should be no noises when

turing it by hand.

4、葉輪表面的氣蝕。由于葉片背水面運(yùn)行時(shí)產(chǎn)生負(fù)壓，當(dāng)壓力Pk<Pva時(shí)，產(chǎn)生汽穴和蜂窩表面后，在電化學(xué)腐蝕作用下，使泵葉汽蝕。

5、容積損失和機(jī)械損失。由于泵使用時(shí)間長，機(jī)械磨損產(chǎn)生漏失和阻力增大，使容積效率和機(jī)械效率降低。

以上原因，使水泵性能變差。運(yùn)行效率降低2～5%，嚴(yán)重的可以使水泵效率降低10%以上。