Full Text:   <802>

Summary:  <218>

CLC number: 

On-line Access: 2024-03-13

Received: 2023-01-30

Revision Accepted: 2023-06-08

Crosschecked: 2024-03-13

Cited: 0

Clicked: 1050

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Bin MENG

https://orcid.org/0000-0001-6839-0832

-   Go to

Article info.
Open peer comments

Journal of Zhejiang University SCIENCE A 2024 Vol.25 No.3 P.251-267

http://doi.org/10.1631/jzus.A2300053


Churning loss characteristics of a wet three-phase high-speed reluctance motor


Author(s):  Zhenzhou ZHANG, Mingzhu DAI, Chenchen ZHANG, Yi CHEN, Bin MENG

Affiliation(s):  College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China

Corresponding email(s):   bin_meng@zjut.edu.cn

Key Words:  Motor pump, Wet motor, Churning loss, Analytical model, Computational fluid dynamics (CFD)


Zhenzhou ZHANG, Mingzhu DAI, Chenchen ZHANG, Yi CHEN, Bin MENG. Churning loss characteristics of a wet three-phase high-speed reluctance motor[J]. Journal of Zhejiang University Science A, 2024, 25(3): 251-267.

@article{title="Churning loss characteristics of a wet three-phase high-speed reluctance motor",
author="Zhenzhou ZHANG, Mingzhu DAI, Chenchen ZHANG, Yi CHEN, Bin MENG",
journal="Journal of Zhejiang University Science A",
volume="25",
number="3",
pages="251-267",
year="2024",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300053"
}

%0 Journal Article
%T Churning loss characteristics of a wet three-phase high-speed reluctance motor
%A Zhenzhou ZHANG
%A Mingzhu DAI
%A Chenchen ZHANG
%A Yi CHEN
%A Bin MENG
%J Journal of Zhejiang University SCIENCE A
%V 25
%N 3
%P 251-267
%@ 1673-565X
%D 2024
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300053

TY - JOUR
T1 - Churning loss characteristics of a wet three-phase high-speed reluctance motor
A1 - Zhenzhou ZHANG
A1 - Mingzhu DAI
A1 - Chenchen ZHANG
A1 - Yi CHEN
A1 - Bin MENG
J0 - Journal of Zhejiang University Science A
VL - 25
IS - 3
SP - 251
EP - 267
%@ 1673-565X
Y1 - 2024
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2300053


Abstract: 
With the increasing requirements of electro-hydrostatic actuators (EHAs) for power, volume, and pressure, there is a growing tendency in the industry to combine the motor and pump to form a so-called ‘motor pump’ to improve the integration. In this paper, a novel structure for a wet three-phase high-speed reluctance motor pump is proposed, which can further improve integration by removing the dynamic seal on the pump shaft, thereby avoiding the problems of dynamic seal wear and oil leakage and improving heat dissipation under high-speed working conditions. However, after the motor is wetted, the churning loss caused by immersion of the rotor in the oil causes additional fluid resistance torque. Based on fundamental fluid mechanics, an analytical model of the churning torque of a wet motor was established. To verify the accuracy of the analytical model, a simulation model of churning loss was established based on computational fluid dynamics (CFD), and the churning torque and flow field state were analyzed. Finally, an experimental prototype was designed and manufactured, and a test bench for churning loss was built. The oil churning torque was measured at different speeds and temperatures. The results from the analytical, simulation, and experimental models agreed well. The experimental results validated the analytical model and CFD simulation. This research provides a practical method for calculating the churning loss and serves as guidance for future optimization of churning loss reduction.

湿式三相高速磁阻电机搅拌损失的特性研究

作者:张震舟,戴铭柱,张晨晨,陈义,孟彬
机构:浙江工业大学,机械工程学院,中国杭州,310023
目的:传统干式电机在高速工况下存在动密封磨损和油液泄露等问题。1.本文通过电机湿式化提出一种湿式三相高速磁阻电机泵的新结构以去除动密封。2.简化电机泵结构并提高集成度,以通过油液的循环流动改善电机散热问题。3.集中研究电机湿式化后所引起的搅拌损失问题,为后续湿式电机搅油阻力矩的减阻优化提供一种较好的计算方法。
创新点:1.提出一种新型湿式三相高速磁阻电机泵,并通过O型密封圈来构成湿式耐高压结构,避免了高速工况下的动密封磨损、油液泄露和发热严重等问题;2.通过理论分析,推导出湿式电机搅油阻力矩的解析模型;3.基于计算流体力学(CFD)建立湿式电机搅油的仿真模型,并对其运行过程中所受到的阻力矩和内部流场状态进行分析;4.设计制造实验样机,搭建湿式电机搅油的实验台架,并测试不同转速和温度下的搅油阻力矩。
方法:1.通过理论分析,建立湿式电机搅油阻力矩的解析模型(公式(26));2.通过仿真模拟,对电机运行过程中内部流场状态(图9和10)与其受到的流体阻力矩(图11和12)进行分析,验证解析模型的有效性(图13和14);3.通过湿式电机搅油样机和实验台架(图15和16)测试不同转速和温度下的搅油阻力矩,验证解析模型和仿真模拟的有效性(图19和20)。
结论:1.湿式三相高速磁阻电机泵的新结构能够去除传统动密封,使其无需克服动密封摩擦力;这大大简化了电机泵的结构,提高了集成度,使其可通过油液的循环流动改善电机散热问题。2.电机搅油阻力矩与内部流场参数之间存在映射关系,因此可通过建立解析模型实现关联表征;通过CFD对湿式电机搅油进行仿真模拟,能够验证解析模型的有效性,为电机流场求解提供一种较好的方法。3.实验结果验证了解析模型和仿真模拟的有效性;三者的搅油阻力矩在不同转速、不同温度下的曲线趋势吻合良好,为后续湿式电机搅油阻力矩的减阻优化提供了一种较好的计算方法。4.在高速运转过程中,电机的侧面搅油阻力矩占总搅油阻力矩的比重很大,所以如何优化电机结构参数以减小其侧面搅油阻力矩是该湿式电机能否得以成功应用的关键所在。

关键词:电机泵;湿式电机;搅拌损失;解析模型;计算流体力学(CFD)

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]CaiXZ, 2018. Analysis on the research status of motor pump at home and abroad. Hydraulics Pneumatics & Seals, 38(9):1-3 (in Chinese).

[2]ChaoQ, ZhangJH, XuB, et al., 2019. A review of high-speed electro-hydrostatic actuator pumps in aerospace applications: challenges and solutions. Journal of Mechanical Design, 141(5):050801.

[3]ClaarLM, HodgesRC, 1998. Integrated Electric Motor Driven in Line Hydraulic Pump. US Patent 5708311.

[4]FuYL, YangJY, ZhuDM, 2017. Finite element analysis of flow field and temperature field of electro-hydraulic pump by Fluent. Journal of Beijing University of Aeronautics and Astronautics, 43(8):1647-1653 (in Chinese).

[5]GaoDR, LiuJH, WenMS, 2010. Analysis of internal flow field of a new axial piston hydraulic motor pump. Journal of Yanshan University, 34(6):483-492 (in Chinese).

[6]GeYW, ZhuWL, LiuJH, et al., 2021. Refined modeling and characteristic analysis of electro-hydrostatic actuator. Journal of Mechanical Engineering, 57(24):66-73 (in Chinese).

[7]HuangY, DingC, WangHY, et al., 2020. Numerical and experimental study on the churning losses of 2D high-speed piston pumps. Engineering Applications of Computational Fluid Mechanics, 14(1):764-777.

[8]JensenKJ, EbbesenMK, HansenMR, 2021. Novel concept for electro-hydrostatic actuators for motion control of hydraulic manipulators. Energies, 14(20):6566.

[9]JiH, LiZF, WangZR, et al., 2010. Performance test of the prototype of electric motor pump. Transactions of the Chinese Society for Agricultural Machinery, 41(11):48-51 (in Chinese).

[10]JiH, ZhangJM, WangJL, et al., 2014. Charging effect of port-plate centrifugal pump in electric motor-pump. Journal of Mechanical Engineering, 50(10):177-182 (in Chinese).

[11]JiaoZX, LiZH, ShangYX, et al., 2022. Active load sensitive electro-hydrostatic actuator on more electric aircraft: concept, design, and control. IEEE Transactions on Industrial Electronics, 69(5):5030-5040.

[12]JinDC, RuanJ, LiS, et al., 2019. Modelling and validation of a roller-cam rail mechanism used in a 2D piston pump. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 20(3):201-217.

[13]JinZH, ZhaoLY, ZhaoXL, 2021. Research on characteristics of oil immersed motor for deep water servo application. Journal of Tianjin University of Technology, 37(3):40-44 (in Chinese).

[14]KittisaresS, HirotaY, NabaeH, et al., 2022. Alternating pressure control system for hydraulic robots. Mechatronics, 85:102822.

[15]LeeYN, MinkowyczWJ, 1989. Heat transfer characteristics of the annulus of two coaxial cylinders with one cylinder rotating. International Journal of Heat & Mass Transfer, 32(4):711-722.

[16]LeiZF, QinLJ, WuXD, et al., 2021. Research on fault diagnosis method of electro-hydrostatic actuator. Shock and Vibration, 2021:6688420.

[17]LiWF, LiuHF, GongX, 2016. Engineering Fluid Mechanics. 2nd Edition. East China University of Science and Technology Press, Shanghai, China, p.96-97 (in Chinese).

[18]LiYP, JiaoZX, YuT, et al., 2020. Viscous loss analysis of the flooded electro-hydrostatic actuator motor under laminar and turbulent flow states. Processes, 8(8):975.

[19]LiZF, ShaoYB, FuYL, et al., 2014. Oil gap loss and mechanical efficiency of axial piston electro-hydraulic pump. Journal of Beijing University of Aeronautics and Astronautics, 40(6):769-774 (in Chinese).

[20]LiuJ, 2021. Analysis of Cavitating Jet Characteristics of Axial Piston Pump Considering Viscosity Temperature Characteristics. MS Thesis, Taiyuan University of Technology, Taiyuan, China (in Chinese).

[21]Nouri-BorujerdiA, NakhchiME, 2017. Heat transfer enhancement in annular flow with outer grooved cylinder and rotating inner cylinder: review and experiments. Applied Thermal Engineering, 120:257-268.

[22]SAUERBIBUS, 1999. Electrical Motor with Integrated Axial Piston Pump Series J-RP Rotor Pump. https://www.sauerbibus.de/fileadmin/editors/countries/sab/Downloads/J-RP_007_0605.pdf

[23]SongBC, LeeDY, ParkSY, et al., 2019. Design and performance of nonlinear control for an electro-hydraulic actuator considering a wearable robot. Processes, 7(6):389.

[24]TaylorGI, 1923. VIII. Stability of a viscous liquid contained between two rotating cylinders. Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character, 223(605-615):289-343.

[25]WangH, CaoC, GuoJ, et al., 2022. Design and friction loss study of full-ocean depth oil-filled direct current motor. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 23(8):587-598.

[26]WangY, GuoSR, DongHK, 2020. Modeling and control of a novel electro-hydrostatic actuator with adaptive pump displacement. Chinese Journal of Aeronautics, 33(1):365-371.

[27]WuY, XiWJ, ZhangCL, et al., 2022. Thermohydrodynamic lubrication analysis of micro gas bearing with journal misalignment. Journal of Aerospace Power, 37(9):‍1979-1991 (in Chinese).

[28]ZhangCC, RuanJ, XingT, et al., 2021. Research on the volumetric efficiency of a novel stacked roller 2D piston pump. Machines, 9(7):128.

[29]ZhangDJ, GaoDR, WangYJ, et al., 2008. Numerical calculation and analysis of electro-magnetic field of axial piston hydraulic motor pump based on ANSYS. Journal of Mechanical Engineering, 44(12):69-74 (in Chinese).

[30]ZhangY, 2020. Research on the Operating Characteristics and Structure Influence of the Rotary Energy Recovery Device. MS Thesis, Jiangsu University, Zhenjiang, China (in Chinese).

[31]ZhangYY, 2022. Thermal-Hydraulic Modeling and Structure Optimization of Oil-Immersed Motor Pump. MS Thesis, Yanshan University, Qinhuangdao, China (in Chinese).

[32]ZhuBH, QianPC, JiZQ, 2018. Research on the flow distribution characteristics and variable principle of the double-swashplate hydraulic axial piston electric motor pump with port valves. Journal of Mechanical Engineering, 54(20):220-234 (in Chinese).

[33]ZhuT, XieHB, YangHY, 2022. Design and tracking control of an electro-hydrostatic actuator for a disc cutter replacement manipulator. Automation in Construction, 142:104480.

[34]ZhuYC, XiaoQH, GaoMX, et al., 2018. Flow characteristics analysis of a two-phase suspension between rotating porous cylinders with radial and axial flows. Thermal Science, 22(4):1857-1864.

[35]ZouGW, HeZ, GuX, 2013. Viscous Fluid Dynamics. National Defense Industry Press, Beijing, China, p.215-219 (in Chinese).

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE