農(nóng)用混流泵A花山農(nóng)用混流泵A簡(jiǎn)單輕便農(nóng)用混流泵
8,甩油環(huán)變形。甩油環(huán)不能滾動(dòng),帶不上油。處理辦法:更新甩油環(huán)。9,聯(lián)軸器對(duì)中不良或軸向空隙太小。處理辦法:查看對(duì)中狀況和調(diào)整軸向空隙。九,軸封發(fā)熱要素及處理辦法如下:1,填料壓得太緊或干沖突。處理辦法:放松填料,查看水封管。
*技術(shù)參數(shù)
(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(guò)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(guò)分降低時(shí),泵的使用效益低,為此,應(yīng)盡量避免泵在過(guò)低轉(zhuǎn)速下運(yùn)行。用戶應(yīng)按性能曲線圖選擇使用。
農(nóng)用混流泵A花山農(nóng)用混流泵A簡(jiǎn)單輕便農(nóng)用混流泵
檢查水泵應(yīng)注意三點(diǎn):(1)泵軸應(yīng)能靈活轉(zhuǎn)動(dòng),無(wú)撞擊聲;泵軸徑向無(wú)明顯晃動(dòng),需加足潤(rùn)滑油。(2)檢查進(jìn)水膠管有無(wú)破損,如有開(kāi)裂要及時(shí)粘修。檢查各緊固螺栓有無(wú)松動(dòng),要擰緊松動(dòng)的螺栓。(3)潛水泵的電機(jī)繞組,電纜線絕緣須符合要求,才能使用。
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
農(nóng)用混流泵A花山農(nóng)用混流泵A簡(jiǎn)單輕便農(nóng)用混流泵
5,其它部位漏液。處理辦法:查看軸封等部位。6,泵葉輪阻塞,磨損,腐蝕。處理辦法:清潔,查看,調(diào)換。五,揚(yáng)程不行要素及處理辦法如下:1,同二的1,2,3,4,三的1,四的6。處理辦法:采納相應(yīng)措施。2,葉輪裝反(雙吸泵)。處理辦法:查看葉輪。
*特征描述
HW 型蝸殼式混流泵是按國(guó)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(jiǎn)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(shuō)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(zhǎng)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?lè)较蛐D(zhuǎn)(即箭頭所示的方向旋轉(zhuǎn))。
農(nóng)用混流泵A花山農(nóng)用混流泵A簡(jiǎn)單輕便農(nóng)用混流泵
3,液體密度添加。處理辦法:查看液體密度。4,填料壓得太緊或干沖突。處理辦法:放松填料,查看水封管。5,軸承損壞。處理辦法:查看修補(bǔ)或替換軸承。6,轉(zhuǎn)速過(guò)高。處理辦法:查看驅(qū)動(dòng)機(jī)和電源。7,泵軸曲折。處理辦法:糾正泵軸。
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 bance 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.
采用流線迭代法求解軸面流動(dòng).流線迭代法基于沿任意準(zhǔn)正交線的軸面速度梯度方程和流體運(yùn)動(dòng)的連續(xù)方程,根據(jù)各子流道流量相等的原則,迭代求解沿準(zhǔn)正交線的軸面速度梯度方程即可得到軸面流網(wǎng).通過(guò)流線迭代法,在確定軸面流道輪廓之后,可以通過(guò)所需時(shí)間很短的迭代計(jì)算過(guò)程得到的軸面流網(wǎng).圖1是流網(wǎng)所對(duì)應(yīng)的軸面速度沿軸面流線的分布圖.