【正文】 大。當(dāng)厚度增加到一定程度時(shí)，增加的磁勢(shì)全部被磁阻和漏磁消耗，故轉(zhuǎn)矩最后增加得很慢甚至不增加。所以，永磁體的厚度應(yīng)該選定在 2030ｍｍ之間。中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)344 結(jié)論本論文以渦流式永磁磁力耦合傳動(dòng)裝置為模型，通過(guò) ANSYS 有限元分析軟件進(jìn)行建模以及磁場(chǎng)和磁力的計(jì)算機(jī)模擬，研究永磁材料的尺寸對(duì)徑向及軸向磁力的影響規(guī)律，得到的主要結(jié)論如下：1） 其他參數(shù)不變，隨永磁體厚度的增加，渦流式永磁磁力傳動(dòng)裝置軸向磁力逐漸增大；2） 其他參數(shù)不變，隨永磁體厚度的增大，渦流式永磁磁力傳動(dòng)裝置轉(zhuǎn)矩開(kāi)始增加很快，而后增加很慢，趨于飽和。即隨永磁體厚度增加，徑向磁力逐漸增加，永磁體厚度達(dá) 30mm 時(shí)趨于飽和。因此，為獲得最大轉(zhuǎn)矩，即最大徑向磁力，在節(jié)約材料與設(shè)備成本的情況下，永磁體的厚度應(yīng)該選定在 2030mm 之間較為合適。中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)35參考文獻(xiàn)[1] 楊超君,[J]., (02): 1719[2] 王玉良,王喆,高興軍,[J]., (01): 2325[3] [M].北京：高等教育出版社,1983, 97103[4] [J]., (04): 1117[5] Tang Qingchang, liwei, XiaXuejun. Investigation on a magentichydrodynamic hybrid thust bearing[J]. Tribology Letter. 2022, (05): 3437[6] 王洪群,虞培清,章志耿,[J]., (10): 2225[7] [M].北京：化學(xué)工業(yè)出版社,2022, 4349[8] [J]., (4): 2426[9] [J].，16(6): 7985[10] 王品,鄧子龍,[J].磁性材料及, 38(2): 4043[11] [J]., (08): 5559[12] . A TwoDimensional Analysis for the Coupling of Magic Gears[J]. IEEE Trans. 1997, 33(3): 61126115[13] , . A ThreeDimensional Model forComputing the Torque of Radial Couplings[J]. IEEE Trans. 1995, 31(5): 22412244[14] 「博士學(xué)位論文].長(zhǎng)春：吉林大學(xué)，2022[15] [J]., (5): 2122[16] 趙國(guó)偉,葉子兆,周國(guó)忠,[J].水泵技術(shù).2022, (04): 2426[17] 張倩, 電磁學(xué)有限元分析從入門到精通[M].北京:化學(xué)工業(yè)出版社,2022, 5967[18] 工程分析實(shí)例教程[M].北京：化學(xué)工業(yè)出版社，2022, 7784[19] 從恒斌,[J].，15(4):中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)36 353357[20] , , . A High Efficiency Alignment and Vibration Tolsrant,Coupler Using High Energy Product Permanent Mags[J]. IEE Seventh Electric Motors and Drives Conference. 1995, 73(02): 299305 [21] . Design optimization of magic couplings using high energy mags[J]. Electric Machines and Power Systems. 1993, 21(1): 115126[22] 林其壬,[M].北京：機(jī)械工業(yè)出版社，1987,123131[23] 孔繁余，[J].機(jī)械設(shè)計(jì)與研究.2022，40(3): 2427[24] , , . Drive Couplings[J]. IEEEMD Conference. 1998, 153 (02): 289293[25] [J]., (6): 3539中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)37致 謝本論文是在我的導(dǎo)師劉文言老師的悉心指導(dǎo)下完成的，從論文的選題與實(shí)踐等各方面都傾注了劉老師大量的心血。在完成論文期間，劉老師嚴(yán)謹(jǐn)求實(shí)的學(xué)術(shù)態(tài)度、認(rèn)真踏實(shí)的工作作風(fēng)、待人誠(chéng)懇的處事態(tài)度讓我受益匪淺。在此論文順利完成之際，我向尊敬的劉老師表示衷心的感謝!感謝實(shí)驗(yàn)室的師兄、師姐們對(duì)我學(xué)習(xí)和生活上悉心的指導(dǎo)和照顧！感謝李旭久師兄在學(xué)術(shù)上給予的大力幫助及實(shí)驗(yàn)過(guò)程中的各方面支持!感謝中國(guó)礦業(yè)大學(xué)（北京）機(jī)電學(xué)院和材料 082 班這個(gè)集體，讓我度過(guò)了大學(xué)美好的四年，給我提供了良好的學(xué)習(xí)氛圍和生活環(huán)境！感謝我的親人、室友以及身邊的朋友，你們無(wú)私的支持與關(guān)愛(ài)是我?jiàn)^斗進(jìn)取的動(dòng)力！感謝論文引用參考文獻(xiàn)中提及和未提及的著、譯、作者！最后感謝各位老師在百忙之中評(píng)閱我的論文，參加我的答辯，由于時(shí)間和水平有限，論文難免存在缺點(diǎn)和不足，期盼能得到各位老師的批評(píng)與指正。中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)38英文原文Performance Study Based on Inner Flow Field Numerical Simulationof Magic Drive Pumps with Different Rotate SpeedsAbstract: Magic drive pump has gotten great achievement and has been widely used in some special fields. Currently, the researcheson magic drive pump have focused on hydraulic design, bearing, axial force in China, and a new magic drive pump with low flowand high head have been developed overseas. However, low efficiency and large size are the mon disadvantages for the magicdrive pump. In order to study the performance of highspeed magic drive pump, FLUENT was used to simulate the inner flow fieldof magic drive pumps with different rotate speeds, and get velocity and pressure distributions of inner flow field. According toanalysis the changes of velocity and pressure to ensure the stable operation of pump and avoid cavitation. Based on the analysis ofvelocity and pressure, this paper presents the pump efficiency of magic drive pumps with different rotated speeds by calculating thepower loss in impeller and volute, hydraulic loss, volumetric loss, mechanical loss and discussing the different reasons of power lossbetween the magic drive pumps with different rotated speeds. In addition, the magic drive pumps were tested in a closed testingsystem. Pressure sensors were set in inlet and outlet of magic drive pumps to get the pressure and the head。 The results of simulation and test were similar,which shows that the method of simulation is feasible. The proposed research provides the instruction to design highspeed magicdrive pump.Key words: magic drive pump, simulation, power loss, pump efficiency.中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)39Magic drive pumps are currently used in petrol andchemical industries to pump toxic, explosive, corrosive andexpensive fluid. Highspeed magic drive pump will havean extensive prospect with the application of frequencyconversion technology and the requirement of environmental protection.Currently, studies on the design of magic drive pump,bearing, axial force and magic coupling have been goingon for several years, and some achievements have been University developed the magic drive pump withhigh power, which provided the design method of magic drive pump. Kong Fnayu developed a new bearing material FC50[4–5], which is well in wearable performance and a new way to balance the axial force by using cooling cycle fluid which almost eliminate axial force[6]. Refs. [7–11] use ANSYS to simulate the efficiency of magic coupling, which improves the efficiency of magic drive pump. RIKKE, et al[12], researched into the distribution of flow field by using large eddy simulation to simulate the inner flow field in impeller under different operating [13] investigated into the distributions of pressure and velocity when impeller and pumping chamber were in different relative positions by simulating the unsteady flow in centrifugal pump. BENRA[14] proved that the method of simulation was feasible by simulating velocity distribution in singleimpeller centrifugal pump and paring simulation with testing result of PIV. Many researchers have researched and analyzed inner flow field in the pump by using 中國(guó)礦業(yè)大學(xué)(北京)2022 屆本科生畢業(yè)設(shè)計(jì)(論文)40putational fluid dynamics(CFD). In order to do further research on the performance of magic drive pump, this paper presents the simulation of 3D turbulent model inside of magic drive pumps with different rotated speeds. The distributions of pressure and velocity in impeller and volute were got。 head efficiency and