矿用柱塞泵往往由于十字头润滑油量分配不平均,导致滑道与十字头的损耗程度不等,进而影响泵的性能,增大设备的维护成本。针对一种五柱塞矿用柱塞泵在强制润滑设计条件下,五个十字头润滑油量分布不均问题,本文基于ANSYS Fluent对柱塞泵...矿用柱塞泵往往由于十字头润滑油量分配不平均,导致滑道与十字头的损耗程度不等,进而影响泵的性能,增大设备的维护成本。针对一种五柱塞矿用柱塞泵在强制润滑设计条件下,五个十字头润滑油量分布不均问题,本文基于ANSYS Fluent对柱塞泵的十字头强制润滑油路的流场进行了仿真计算,主要研究了节流阀的节流孔径、润滑油路主流道管径与管道突扩设计位置对五个十字头润滑流道流量分配的影响。仿真结果表明,当节流阀节流孔径为5 mm,主流道在距离节流入口592 mm处采用15 mm管径突扩20 mm管径设计时,十字头往复润滑油路的流量分配情况最理想。Mining plunger pumps often suffer from uneven lubricating oil distribution in the crossheads, leading to disproportionate wear between the slide and crossheads, thereby affecting pump performance and escalating maintenance costs. This article addresses the issue of uneven lubricant flow among the five crossheads of a five-plunger mining pump under forced lubrication conditions. Utilizing ANSYS Fluent, we performed a fluid flow simulation of the forced lubrication oil path for the crossheads. The research primarily investigates the effects of throttle valve orifice diameter, main oil passage pipe diameter, and the design position of pipe expansions on the flow distribution within the lubrication channels for each crosshead. Simulation results indicate that optimal flow distribution occurs when the throttle valve orifice diameter is set to 5 mm, with a main oil passage expanding from 15 mm to 20 mm at a distance of 592 mm from the throttle inlet.展开更多
Friction and lubrication simulation analysis of internal combustion engine bearings are studied. A series of software implementary precepts for mathematical modeling, to analytic calculating and realizing simulation o...Friction and lubrication simulation analysis of internal combustion engine bearings are studied. A series of software implementary precepts for mathematical modeling, to analytic calculating and realizing simulation outcome are brought forward. As a dynamic simulating technique is introduced into the process of engine bearing design, simulation models of the oil film are built and the emulational analysis of the shaft center track is carried out. A software program package “Engine Bearing Friction and Lubrication Dynamic Simulation System” is developed to realize the real time simulation of the working status of bearing during the design process. Through developing virtualized products, the defects of the product design can be found in time and improve the products at once. Thus the purpose of predicting and controlling the cost, quality and design period of the products can be achieved.展开更多
In order to improve the cutting stiffness,the paper studies the vertical hydrostatic bearing in the slide when a ram is in feed process.The change of the oil film thickness on hydrostatic guide rail and the curve of t...In order to improve the cutting stiffness,the paper studies the vertical hydrostatic bearing in the slide when a ram is in feed process.The change of the oil film thickness on hydrostatic guide rail and the curve of the oil film thickness in various cutting forces are calculated and a relation model through theoretical analysis method is derived.The pressure field of the guide rail recess is simulated based on the finite volume method and demonstrated through experiments.The study is of vital theoretical significance for the improvement of machining accuracy of numerical control machines and the entire computer numerical control(CNC) equipment and provides valuable theoretical basis for the design of hydrostatic guide rail in engineering practice.展开更多
文摘矿用柱塞泵往往由于十字头润滑油量分配不平均,导致滑道与十字头的损耗程度不等,进而影响泵的性能,增大设备的维护成本。针对一种五柱塞矿用柱塞泵在强制润滑设计条件下,五个十字头润滑油量分布不均问题,本文基于ANSYS Fluent对柱塞泵的十字头强制润滑油路的流场进行了仿真计算,主要研究了节流阀的节流孔径、润滑油路主流道管径与管道突扩设计位置对五个十字头润滑流道流量分配的影响。仿真结果表明,当节流阀节流孔径为5 mm,主流道在距离节流入口592 mm处采用15 mm管径突扩20 mm管径设计时,十字头往复润滑油路的流量分配情况最理想。Mining plunger pumps often suffer from uneven lubricating oil distribution in the crossheads, leading to disproportionate wear between the slide and crossheads, thereby affecting pump performance and escalating maintenance costs. This article addresses the issue of uneven lubricant flow among the five crossheads of a five-plunger mining pump under forced lubrication conditions. Utilizing ANSYS Fluent, we performed a fluid flow simulation of the forced lubrication oil path for the crossheads. The research primarily investigates the effects of throttle valve orifice diameter, main oil passage pipe diameter, and the design position of pipe expansions on the flow distribution within the lubrication channels for each crosshead. Simulation results indicate that optimal flow distribution occurs when the throttle valve orifice diameter is set to 5 mm, with a main oil passage expanding from 15 mm to 20 mm at a distance of 592 mm from the throttle inlet.
文摘Friction and lubrication simulation analysis of internal combustion engine bearings are studied. A series of software implementary precepts for mathematical modeling, to analytic calculating and realizing simulation outcome are brought forward. As a dynamic simulating technique is introduced into the process of engine bearing design, simulation models of the oil film are built and the emulational analysis of the shaft center track is carried out. A software program package “Engine Bearing Friction and Lubrication Dynamic Simulation System” is developed to realize the real time simulation of the working status of bearing during the design process. Through developing virtualized products, the defects of the product design can be found in time and improve the products at once. Thus the purpose of predicting and controlling the cost, quality and design period of the products can be achieved.
基金Supported by the National Natural Science Funds for Young Scholar of China(No.51005063)the Science and Technology Innovation People of Harbin(No.2013RFQXJ086)+1 种基金Heilongjiang Postdoctoral Foundation(No.LBH-Q12062)the National Natural Science Foundation of China(No.51075106)
文摘In order to improve the cutting stiffness,the paper studies the vertical hydrostatic bearing in the slide when a ram is in feed process.The change of the oil film thickness on hydrostatic guide rail and the curve of the oil film thickness in various cutting forces are calculated and a relation model through theoretical analysis method is derived.The pressure field of the guide rail recess is simulated based on the finite volume method and demonstrated through experiments.The study is of vital theoretical significance for the improvement of machining accuracy of numerical control machines and the entire computer numerical control(CNC) equipment and provides valuable theoretical basis for the design of hydrostatic guide rail in engineering practice.
