一种矿用柱塞泵十字头润滑油路流场仿真分析

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.

矿用高压柱塞泵并联运行特性实验研究

当前煤矿水力化增透措施多采用大型矿用柱塞高压水泵,井下搬运困难且检修时影响增透作业,可采用多台小型高压水泵并联运行替代大型高压水泵予以解决。根据高压柱塞泵的运行原理,分别建立了单台泵和多泵并联泵组的瞬时流量计算公式。利用高压泵组并联运行实验装置开展并联泵组运行特性实验,结果表明:高压柱塞泵的电机转速、瞬时工况流量随射流压力升高而线性降低,并联泵组流量与泵的并联数量线性正相关。提出了高压柱塞泵瞬时流量修正公式,单泵和并联泵组瞬时流量修正值与实测值误差低于1.5%,可用于并联泵组方案的设计。

煤机装备用液压泵滑靴副油膜特性研究

滑靴副作为高压轴向柱塞泵三大摩擦副之一,运动及受力情况最为复杂,不仅存在较大的功率损失,且作为易损部位极易导致烧盘及滑靴结构变形失效,对柱塞泵性能具有重要影响。以煤机装备用斜盘式高压柱塞泵滑靴副为研究对象,利用MATLAB软件数值计算得出间隙油膜全周期压力场及厚度场变化规律。