液压电机泵中孔板离心泵的增压效应的研究
发布时间：2018-07-25 20:12
【摘要】：液压电机泵是将电动机、液压泵及孔板离心泵融合为一体的新型液压动力单元,具有结构紧凑、静音、效率高、无外泄漏等优点,液压电机泵已经成为液压动力单元的一个重要的发展方向。本文主要是对液压电机泵内部流动问题开展研究,采用理论分析、数值仿真与试验相结合的方法,对液压电机泵中孔板离心泵的增压作用进行深入分析。应用Fluent流场仿真软件对不同进油方式下的液压电机泵主泵吸油流场进行仿真计算,研究不同进油方式对孔板离心泵增压作用的影响。并在此基础上对液压电机泵内部流道进行了进一步的优化,同时对不同转速条件下的主泵吸油流场进行数值计算,获得孔板离心泵增压作用随转速变化规律。搭建液压电机泵样机测试系统,对液压电机泵的流量、转速、容积效率、噪声等进行测量,并与同规格电机油泵组实验数据进行对比分析。本论文对液压电机泵吸油流道的设计具有重要的参考价值,并对研制高效液压电机泵与改善液压泵自吸性能具有普适的指导意义。 论文的主要内容如下： 第1章,阐述了本课题的研究背景及意义；系统介绍了液压电机泵的研究及发展概况,概括并总结了本论文的主要研究内容。 第2章,对液压电机泵的内部结构进行了说明,并详细阐述了液压电机泵的工作原理；应用Fluent流场仿真软件,对不同进油方式下的液压电机泵主泵吸油流场进行仿真计算,研究不同进油方式对孔板离心泵增压作用的影响。并在此基础上对液压电机泵内部流道进行了进一步的优化,对修改后的主泵吸油流场进行仿真计算,结果表明：改进后的孔板离心泵增压作用较之改进前有了显著的提升,能够有效提高主泵吸油性能；简化了液压电机泵进油结构,有利于工作过程中的散热。 第3章,通过流场仿真软件Fluent对修改后的液压电机泵主泵吸油流场进行仿真计算,获得主泵吸油流场在不同转速下的总压分布云图并进行对比分析,得到如下结论：随着转速的不断升高,主泵吸油流场中的吸油流道负压不断增大；孔板离心泵的增压作用随转速的升高而增强；孔板离心泵出口(主泵吸油腔进口)总压分布并不均匀,出口总压的最大值可以作为评定孔板离心泵提升主泵吸油性能的指标,总压最大值随着转速的升高而升高,呈现近似线性的变化规律。孔板离心泵的增压效果随转速的升高而增强,为主泵充分供油,提高主泵的吸油性能。 第4章,搭建了液压电机泵样机性能试验系统,并应用该系统对液压电机泵与同等规格电机油泵组进行对比试验,获得了流量、转速、容积效率、压力、噪声等实验数据。通过试验可以得知：孔板离心泵可明显地促进主泵充分吸油,液压电机泵与同规格电机油泵组相比容积效率高1.25%左右；当转速低于1395r/min后,液压电机泵容积效率开始低于电机油泵组,会对主泵吸油产生不利影响,压力上升至22MPa时,液压电机泵容积效率相对降低2.7%。结合流场仿真计算结果,最终总结出了孔板离心泵增压效应的确切含义。液压电机泵噪声声级明显比电机油泵组低,当输出压力上升至16MPa时,液压电机泵噪声声级低13.5dB,噪声频谱以低频噪声为主,孔板离心泵为主泵充分供油,有效减少了因吸油不足而产生的气穴噪声。 最后,对本论文的研究工作和成果进行了总结,并展望了下一步的研究工作。
[Abstract]:The hydraulic motor pump is a new type of hydraulic power unit which combines the motor, the hydraulic pump and the hole plate centrifugal pump. It has the advantages of compact structure, quiet, high efficiency, no leakage and so on. The hydraulic motor pump has become an important development direction of the hydraulic power unit. This paper mainly studies the internal flow problem of the hydraulic motor pump. Using the method of theoretical analysis, numerical simulation and experiment, the pressurization of the hole plate centrifugal pump in the hydraulic motor pump is analyzed in depth. The simulation calculation of the oil absorption flow field of the main pump of the hydraulic motor pump under different oil intake mode is carried out by using the Fluent flow field simulation software, and the effect of the different oil intake mode on the turbocharging of the hole plate centrifugal pump is studied. On the basis of this, the internal flow path of the hydraulic motor pump is further optimized. At the same time, the flow field of the main pump in the main pump under different rotational speeds is calculated, and the law of the pressure change with the speed of the hole plate centrifugal pump is obtained. The test system of the hydraulic motor pump prototype is built, and the flow, speed, volume efficiency and noise of the hydraulic motor pump are set up. This paper has an important reference value for the design of the oil suction flow channel of the hydraulic motor pump, and has the universal guiding significance for the development of the high efficiency hydraulic motor pump and the improvement of the self-priming performance of the hydraulic pump.
The main contents of the paper are as follows:
In the first chapter, the background and significance of the research are expounded, the research and development of the hydraulic motor pump are introduced systematically, and the main contents of this paper are summarized and summarized.
In the second chapter, the internal structure of the hydraulic motor pump is explained, and the working principle of the hydraulic motor pump is expounded in detail. The simulation software of the Fluent flow field simulation software is used to simulate the oil absorption flow field of the main pump of the hydraulic motor pump under different oil intake modes, and the influence of different oil intake modes on the turbocharging of the orifice centrifugal pump is studied. The internal flow path of the hydraulic motor pump is further optimized. The simulation calculation of the oil absorption flow field of the modified main pump is carried out. The result shows that the booster effect of the improved hole plate centrifugal pump has a remarkable improvement compared with that before the improvement. It can effectively improve the oil absorption performance of the main pump, and simplify the oil intake structure of the hydraulic motor pump, which is beneficial to the work. Heat dissipation in the course.
The third chapter, through the flow field simulation software Fluent, simulated the oil absorption flow field of the modified hydraulic motor pump main pump, and obtained the total pressure distribution cloud chart of the main pump oil absorption flow field at different rotational speeds and carried on the contrast analysis. The following conclusion is drawn: with the continuous increase of the speed, the suction flow channel negative pressure in the oil suction flow field of the main pump increases continuously; The supercharging effect of the plate centrifugal pump increases with the speed. The total pressure distribution of the outlet of the orifice plate centrifugal pump (the inlet of the main pump suction chamber) is not uniform. The maximum value of the total pressure of the outlet can be used as an index to evaluate the oil absorption performance of the main pump, and the maximum total pressure increases with the increase of the speed, and presents an approximate linear change rule. The supercharging effect of the orifice centrifugal pump increases with the increase of speed, and the main pump provides sufficient oil to improve the oil absorption performance of the main pump.
In the fourth chapter, the performance test system of the hydraulic motor pump prototype is built, and the experimental data of the flow, speed, volume efficiency, pressure and noise are obtained by using the system to compare the hydraulic motor pump with the same specifications of the motor oil pump, and the test can be found that the hole plate centrifugal pump can obviously promote the full oil absorption of the main pump and the hydraulic motor. The volume efficiency of the pump is about 1.25% higher than that of the same size motor oil pump group. When the speed is lower than 1395r/min, the volume efficiency of the hydraulic motor pump begins to be lower than the motor oil pump group. It will have a negative effect on the oil absorption of the main pump. When the pressure rises to 22MPa, the volume efficiency of the hydraulic motor pump decreases relative to the simulation result of the flow field of 2.7%. combined with the simulation result. Finally, the results are summed up. The noise level of the hydraulic motor pump is obviously lower than that of the motor oil pump group. When the output pressure rises to 16MPa, the noise level of the hydraulic motor pump is low 13.5dB, the noise spectrum is mainly low frequency noise, and the hole plate centrifugal pump is the main pump, which reduces the cavitation noise caused by the lack of oil absorption.
Finally, the research work and achievements of this thesis are summarized, and the next research work is prospected.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH137.51
本文编号：2144947
[Abstract]:The hydraulic motor pump is a new type of hydraulic power unit which combines the motor, the hydraulic pump and the hole plate centrifugal pump. It has the advantages of compact structure, quiet, high efficiency, no leakage and so on. The hydraulic motor pump has become an important development direction of the hydraulic power unit. This paper mainly studies the internal flow problem of the hydraulic motor pump. Using the method of theoretical analysis, numerical simulation and experiment, the pressurization of the hole plate centrifugal pump in the hydraulic motor pump is analyzed in depth. The simulation calculation of the oil absorption flow field of the main pump of the hydraulic motor pump under different oil intake mode is carried out by using the Fluent flow field simulation software, and the effect of the different oil intake mode on the turbocharging of the hole plate centrifugal pump is studied. On the basis of this, the internal flow path of the hydraulic motor pump is further optimized. At the same time, the flow field of the main pump in the main pump under different rotational speeds is calculated, and the law of the pressure change with the speed of the hole plate centrifugal pump is obtained. The test system of the hydraulic motor pump prototype is built, and the flow, speed, volume efficiency and noise of the hydraulic motor pump are set up. This paper has an important reference value for the design of the oil suction flow channel of the hydraulic motor pump, and has the universal guiding significance for the development of the high efficiency hydraulic motor pump and the improvement of the self-priming performance of the hydraulic pump.
The main contents of the paper are as follows:
In the first chapter, the background and significance of the research are expounded, the research and development of the hydraulic motor pump are introduced systematically, and the main contents of this paper are summarized and summarized.
In the second chapter, the internal structure of the hydraulic motor pump is explained, and the working principle of the hydraulic motor pump is expounded in detail. The simulation software of the Fluent flow field simulation software is used to simulate the oil absorption flow field of the main pump of the hydraulic motor pump under different oil intake modes, and the influence of different oil intake modes on the turbocharging of the orifice centrifugal pump is studied. The internal flow path of the hydraulic motor pump is further optimized. The simulation calculation of the oil absorption flow field of the modified main pump is carried out. The result shows that the booster effect of the improved hole plate centrifugal pump has a remarkable improvement compared with that before the improvement. It can effectively improve the oil absorption performance of the main pump, and simplify the oil intake structure of the hydraulic motor pump, which is beneficial to the work. Heat dissipation in the course.
The third chapter, through the flow field simulation software Fluent, simulated the oil absorption flow field of the modified hydraulic motor pump main pump, and obtained the total pressure distribution cloud chart of the main pump oil absorption flow field at different rotational speeds and carried on the contrast analysis. The following conclusion is drawn: with the continuous increase of the speed, the suction flow channel negative pressure in the oil suction flow field of the main pump increases continuously; The supercharging effect of the plate centrifugal pump increases with the speed. The total pressure distribution of the outlet of the orifice plate centrifugal pump (the inlet of the main pump suction chamber) is not uniform. The maximum value of the total pressure of the outlet can be used as an index to evaluate the oil absorption performance of the main pump, and the maximum total pressure increases with the increase of the speed, and presents an approximate linear change rule. The supercharging effect of the orifice centrifugal pump increases with the increase of speed, and the main pump provides sufficient oil to improve the oil absorption performance of the main pump.
In the fourth chapter, the performance test system of the hydraulic motor pump prototype is built, and the experimental data of the flow, speed, volume efficiency, pressure and noise are obtained by using the system to compare the hydraulic motor pump with the same specifications of the motor oil pump, and the test can be found that the hole plate centrifugal pump can obviously promote the full oil absorption of the main pump and the hydraulic motor. The volume efficiency of the pump is about 1.25% higher than that of the same size motor oil pump group. When the speed is lower than 1395r/min, the volume efficiency of the hydraulic motor pump begins to be lower than the motor oil pump group. It will have a negative effect on the oil absorption of the main pump. When the pressure rises to 22MPa, the volume efficiency of the hydraulic motor pump decreases relative to the simulation result of the flow field of 2.7%. combined with the simulation result. Finally, the results are summed up. The noise level of the hydraulic motor pump is obviously lower than that of the motor oil pump group. When the output pressure rises to 16MPa, the noise level of the hydraulic motor pump is low 13.5dB, the noise spectrum is mainly low frequency noise, and the hole plate centrifugal pump is the main pump, which reduces the cavitation noise caused by the lack of oil absorption.
Finally, the research work and achievements of this thesis are summarized, and the next research work is prospected.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH137.51
【参考文献】
相关期刊论文 前10条
1 高殿荣;刘金慧;温茂森;;轴向柱塞液压电机泵内部流场的分析[J];燕山大学学报;2010年06期
2 ;Exploitation of Renewable Energy—A Strategic Choice for Sustainable Development of Power Industry[J];Electricity;2005年01期
3 高殿荣;王有杰;陆向辉;李徐佳;乔海军;;基于CFD技术的新型轴向柱塞液压电机泵流场计算与分析[J];机床与液压;2010年05期
4 冀宏;张立升;王峥嵘;王金林;;电动液压动力单元的一体化演变[J];机床与液压;2011年19期
5 付永领;李祝锋;安高成;张猛;齐海涛;薛晶;;电液泵发展现状与关键技术综述[J];机床与液压;2012年01期
6 杨尔庄;;现代运动、传动技术展望[J];机电产品市场;2006年10期
7 杨尔庄;;环保节能、电子化和液压技术[J];机电产品市场;2007年04期
8 王益群,张伟;流体传动及控制技术的评述[J];机械工程学报;2003年10期
9 刘晓红;于兰英;刘桓龙;柯坚;;液压轴向柱塞泵配流盘气蚀机理[J];机械工程学报;2008年11期
10 冀宏;丁大力;王峥嵘;王秀勇;孙磊;胡启辉;;液压电机泵内置孔板离心泵的流场解析与优化[J];机械工程学报;2009年06期
相关博士学位论文 前1条
1 冀宏;液压阀芯节流槽气穴噪声特性的研究[D];浙江大学;2004年
相关硕士学位论文 前6条
1 兰博杰;液压电机叶片泵样机的改进与实验[D];兰州理工大学;2011年
2 刘金慧;轴向柱塞液压电机泵流场数值模拟、效率分析与实验测试[D];燕山大学;2011年
3 孙明智;轴向柱塞泵轴向流道的研究[D];西南交通大学;2007年
4 武俊合;液压电机叶片泵的振动模态分析[D];兰州理工大学;2012年
5 孙天健;液压电机泵转子支撑方式对转子动特性的影响[D];兰州理工大学;2012年
6 王金林;一体化电机叶片泵液压动力单元噪声特性的研究[D];兰州理工大学;2012年
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