發(fā)布時(shí)間：2018-01-04 06:38

  本文關(guān)鍵詞：多級(jí)離心泵軸向力測(cè)試與平衡改進(jìn)設(shè)計(jì)研究　出處：《北京林業(yè)大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 離心泵 軸向力 測(cè)力環(huán) 平衡裝置 測(cè)試實(shí)驗(yàn)

【摘要】：多級(jí)小流量離心泵在運(yùn)行時(shí)會(huì)產(chǎn)生較大的軸向力,如不采取措施來(lái)平衡軸向力,則會(huì)影響泵的運(yùn)行穩(wěn)定性和可靠性,降低壽命,造成嚴(yán)重的后果。若要平衡離心泵軸向力首先要確定軸向力的大小,理論經(jīng)驗(yàn)計(jì)算法、實(shí)驗(yàn)測(cè)試法和數(shù)值模擬法是目前獲得軸向力的的主要方法。平衡盤是最常見(jiàn)的一種平衡離心泵軸向力的結(jié)構(gòu)。 本研究針對(duì)現(xiàn)有需要改進(jìn)三級(jí)小流量離心消防泵,首先利用傳統(tǒng)的理論計(jì)算方法計(jì)算泵的軸向力,并利用CFD數(shù)值模擬確定軸向力；其次,通過(guò)離心泵內(nèi)部機(jī)構(gòu)以及給定空間,設(shè)計(jì)出一個(gè)彈性元件(測(cè)力環(huán))測(cè)量軸向力,對(duì)其結(jié)構(gòu)進(jìn)行模擬分析并改進(jìn)。在所設(shè)計(jì)測(cè)力環(huán)的基礎(chǔ)上,找到測(cè)試元件產(chǎn)生應(yīng)變的最佳位置,粘貼應(yīng)變片并完成測(cè)力彈性元件的靜態(tài)標(biāo)定,設(shè)計(jì)整個(gè)軸向力的測(cè)試方案；最后,根據(jù)已有研究對(duì)平衡裝置數(shù)值模擬結(jié)果,設(shè)計(jì)改進(jìn)三級(jí)消防泵。在生產(chǎn)出樣機(jī)之后,實(shí)驗(yàn)測(cè)試該三級(jí)離心泵的效率、揚(yáng)程和流量等性能參數(shù),對(duì)原有三級(jí)離心泵的和帶有平衡機(jī)構(gòu)離心泵的進(jìn)行軸向力測(cè)試。根據(jù)測(cè)試結(jié)果探討了多級(jí)小流量離心泵的軸向力與流量、揚(yáng)程等參數(shù)的關(guān)系,證明了軸向力測(cè)試系統(tǒng)具有一定的有效性,平衡機(jī)構(gòu)減小了離心泵軸向力,并提高了泵的使用壽命。
[Abstract]:The multi-stage small flow centrifugal pump will produce a large axial force in operation. If no measures are taken to balance the axial force, it will affect the stability and reliability of the pump operation and reduce the life of the pump. If we want to balance the axial force of centrifugal pump, we must first determine the magnitude of axial force, theoretical experience calculation method. The experimental test method and numerical simulation method are the main methods to obtain axial force at present, and the balancing disk is the most common structure of balancing centrifugal pump axial force. Aiming at the need to improve the three-stage centrifugal fire pump with small flow rate, the axial force of the pump is calculated by the traditional theoretical calculation method, and the axial force is determined by CFD numerical simulation. Secondly, through the internal mechanism of centrifugal pump and given space, an elastic element (force ring) is designed to measure axial force, and its structure is simulated and improved. Find out the best position of the strain, paste the strain gauge and finish the static calibration of the elastic element, and design the whole test plan of the axial force. Finally, according to the numerical simulation results of the balancing device, the three-stage fire pump is designed and improved. After the prototype is produced, the performance parameters of the three-stage centrifugal pump, such as efficiency, lift and flow rate, are tested experimentally. The axial force of the original three-stage centrifugal pump and the centrifugal pump with balancing mechanism was tested. Based on the test results, the relationship between axial force and flow rate, lift and other parameters of multi-stage small flow centrifugal pump was discussed. It is proved that the axial force measurement system is effective and the balance mechanism reduces the axial force of the centrifugal pump and improves the service life of the pump.
【學(xué)位授予單位】：北京林業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH311

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