Design of suction flow distributor of main pump in non-oil-immersed air gap type hydraulic electro-motor pump

doi:10.11975/j.issn.1002-6819.2016.10.008

	Design of suction flow distributor of main pump in non-oil-immersed air gap type hydraulic electro-motor pump
	Li, Xiaoping 1,2; Ji, Hong1,2 ; Zhang, Jiming1,2 ; Wang, Jinlin1,2 ; Li, Ruifeng 1,2; Wei, Wenbin 3
	2016-05-15
发表期刊	Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
ISSN	10026819
卷号	32 期号:10 页码:54-59
摘要	The suction performance of hydraulic pumps is one of the important factors restricting pumps' integration and work with high rotating speed. A port-plate centrifugal pump was designed to play a role of charging pumps to boost the inlet pressure of main pump in a non-oil-immersed air gap type hydraulic motor vane pump, which could guarantee the sufficient suction of main pump working at a higher speed. Two problems were incurred when the delivery flow of port-plate centrifugal pump flowed through the suction flow distributor of main pump. The delivery flow of centrifugal pump developed high pressure difference between the outside and inside of flow distribution channel of main pump, and this high pressure difference gave more chances to the separation between vanes and stator of vane pump (main pump). Vortices were formed when the rotary flow flowed through the flow distribution channel of main pump, which made the flow resistance increase and made the fluid flow into the main pump uneasily. And the harm of 2 problems became increasingly serious with the increase of rotating speed. Aiming at solving the problems, an improvement structure that introduced balance slots and guide slots into the suction flow distributor of main pump was proposed. Computational Fluid Dynamics (CFD) software Fluent was used to simulate the flow field distribution and verify the improvement effect of this structure. The results of flow field calculation showed that the balance slot provided a route for the fluid flow from the outside discharge channel to the inside assistive channel and communicated the pressure of them. The pressure of discharge channel was slightly decreased, while that of assistive channel had a sharp increase because of the balance function of balance slot. So the outlet pressure difference of them was kept at a low value. The formation of vortex was avoided when the rotary flow flowed through the discharge channel because of the direction function of guide slot. So the flow resistance of discharge channel was decreased, the inlet flow of discharge channel had an obvious increase, the static pressure of fluid in the discharge channel gradually increased in the flow direction, and the outlet static pressure of discharge channel and assistive channel increased markedly. With the guide slot wrap angle rising, the inlet flow of discharge channel had the upward trend (less than 80°) at first, and then a trend of nearly flatting. The outlet static pressure of discharge channel and assistive channel had the same rule with the inlet flow of discharge channel when the guide slot wrap angle changed; when guide slot wrap angle was larger than 80°, the outlet static pressure of discharge channel increased by 10% and that of assistive channel increased by 15.4%. In addition, the balance slot approximately kept the outlet pressure difference between discharge channel and assistive channel at a low constant value with the change of guide slot wrap angle. A better suction performance is obtained by the main pump because of the improved design of the suction flow distributor that reduces the pressure difference between discharge channel and assistive channel and increases the inlet pressure of main pump, which guarantees the reliability and high efficiency of main pump working at the higher speed. This research can serve as references of flow distribution design of main pump in the hydraulic electro-motor pump. © 2016, Editorial Department of the Transactions of the Chinese Society of Agricultural Engineering. All right reserved.
关键词	Centrifugal pumps Design Electric motors Flow control Flow fields Hydraulic motors Inlet flow Magnetic devices Models Plates (structural components) Pumps Rotating machinery Rotational flow Vane pumps Vortex flow Balance functions Flow distribution Flow distribution designs Flow field calculation Flow field distribution Guide slot Pressure differences Suction performance
DOI	10.11975/j.issn.1002-6819.2016.10.008
收录类别	EI
语种	中文
出版者	Chinese Society of Agricultural Engineering
EI入藏号	20162102422639
EI主题词	Computational fluid dynamics
EI分类号	408.2 Structural Members and Shapes - 601.1 Mechanical Devices - 618.2 Pumps - 631.1 Fluid Flow, General - 632.2 Hydraulic Equipment and Machinery - 705.3 Electric Motors - 723.5 Computer Applications
来源库	Compendex
分类代码	408.2 Structural Members and Shapes - 601.1 Mechanical Devices - 618.2 Pumps - 631.1 Fluid Flow, General - 632.2 Hydraulic Equipment and Machinery - 705.3 Electric Motors - 723.5 Computer Applications
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/113359
专题	能源与动力工程学院科学技术处（军民融合领导小组办公室）
作者单位	1.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Hydraulic & Pneumatic Engineering Research Center in Gansu Province, Lanzhou; 730050, China; 3.School of Control and Computer Engineering, North China Electric Power University, Beijing; 102206, China
第一作者单位	能源与动力工程学院
第一作者的第一单位	能源与动力工程学院
推荐引用方式 GB/T 7714	Li, Xiaoping,Ji, Hong,Zhang, Jiming,et al. Design of suction flow distributor of main pump in non-oil-immersed air gap type hydraulic electro-motor pump[J]. Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,2016,32(10):54-59.
APA	Li, Xiaoping,Ji, Hong,Zhang, Jiming,Wang, Jinlin,Li, Ruifeng,&Wei, Wenbin.(2016).Design of suction flow distributor of main pump in non-oil-immersed air gap type hydraulic electro-motor pump.Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,32(10),54-59.
MLA	Li, Xiaoping,et al."Design of suction flow distributor of main pump in non-oil-immersed air gap type hydraulic electro-motor pump".Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering 32.10(2016):54-59.