润滑油黏度对液体静压导轨性能的影响

中国机械工程 ›› 2013, Vol. 24 ›› Issue (21): 2847-2851.

润滑油黏度对液体静压导轨性能的影响

赵建华;高殿荣

燕山大学，秦皇岛，066004

出版日期:2013-11-10 发布日期:2013-11-15
基金资助:
国家自然科学基金资助项目(51075348)；河北省自然科学基金资助项目(E2011203151)；高等学校博士学科点专项科研基金资助项目(20101333110002)
National Natural Science Foundation of China（No. 51075348）;

Hebei Provincial Natural Science Foundation of China（No. E2011203151）;

Research Fund for the Doctoral Program of Higher Education of China（No. 20101333110002）

Influence of Hydraulic Oil Viscosity on Characteristics of Liquid Hydrostatic Slide

Zhao Jianhua;Gao Dianrong

Yanshan University，Qinhuangdao，Hebei,066004

Online:2013-11-10 Published:2013-11-15
Supported by:

National Natural Science Foundation of China（No. 51075348）;

Hebei Provincial Natural Science Foundation of China（No. E2011203151）;

Research Fund for the Doctoral Program of Higher Education of China
（No. 20101333110002）

摘要/Abstract

摘要：

为了提高液体静压导轨的性能，采用5种牌号润滑油，定量分析了润滑油黏度对导轨性能的影响。首先，根据现场工况确定了导轨系统的初始设计参数，计算了不同温度、不同牌号润滑油的动力黏度;接着，基于导轨的力平衡方程及流量方程，建立了导轨系统总功率损失、静态性能、动态性能的线性化数学模型，以总功率损失、承载能力、静刚度、固有频率、调整时间和动刚度作为导轨系统的性能指标;最后，利用MATLAB软件分析了润滑油黏度对导轨性能的影响。研究表明：增大润滑油牌号(VG22→VG100)，降低工作温度(60℃→10℃)，润滑油黏度增大，导轨系统总功率损失由507.58W (VG22，60℃)降低至33.93W (VG100，10℃)，承载能力、静刚度、固有频率恒定不变，调整时间由29.84μs (VG22，60℃)缩短至0.46 μs (VG100，10℃)，动刚度由173kN/μm (VG22，60℃)增大至10 369kN/μm (VG100，10℃)。因此，增大润滑油的动力黏度，能降低导轨系统的功率损失，静态性能不受其影响，动态性能大大提高。

关键词: 液体静压导轨, 线性化数学模型, 功率损失, 承载能力, 动刚度

Abstract:

In order to improve the characteristics of a liquid hydrostatic slide, the influences of the viscosity of five different grades of hydraulic oil on the characteristics of the slide system were analyzed quantitatively. First, based on the practical working conditions, the initial design parameters of the hydrostatic slide system and the dynamic viscosities of different brands of hydraulic oil at different temperatures were calculated. Then based on force balance equation and flow equation of the hydrostatic slide, the linearized mathematical models of power loss, static performance and dynamic performance of the hydrostatic slide were established. Total power loss, bearing capacity, static stiffness, natural frequency, adjusting time, dynamic stiffness were regarded as the key performance indexes of the hydrostatic slide system. Finally, the influences of the hydraulic oil viscosity on the characteristics of ultra-precision hydrostatic slide system were simulated with MATLAB software. The results indicate that as the grade of hydraulic oil increases (VG22→VG100) and the working temperature decreases (60℃→10℃), the viscosity increases accordingly, and then the total power loss decreases from 507.58W (VG22, 60℃) to 33.93W (VG100, 10℃), the bearing capacity, the static stiffness and the natural frequency remain constant, the adjusting time decreases from 29.84μs (VG22, 60℃) to 0.46μs (VG100, 10℃), and the dynamic stiffness increases from 173kN/μm (VG22, 60℃) to 10 369kN/μm (VG100, 10℃). So it is best to increase the viscosity of hydraulic oil in order to decrease the power loss and to improve the dynamic characteristics of hydrostatic slide system, but the static characteristics are not affected.

Key words: liquid hydrostatic slide, linearized mathematical model, power loss, bearing capacity, dynamic stiffness

中图分类号:

TH137

赵建华;高殿荣. 润滑油黏度对液体静压导轨性能的影响[J]. 中国机械工程, 2013, 24(21): 2847-2851.

Zhao Jianhua;Gao Dianrong. Influence of Hydraulic Oil Viscosity on Characteristics of Liquid Hydrostatic Slide[J]. China Mechanical Engineering, 2013, 24(21): 2847-2851.

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