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  本文關(guān)鍵詞：基于MATLAB的端面微孔機械密封性能參數(shù)計算及優(yōu)化　出處：《蘭州理工大學》2011年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 機械密封 激光加工 端面微孔 密封性能 優(yōu)化

【摘要】：激光加工多孔端面機械密封是一種新型密封,它是在普通機械密封的端面上加工出微米級的小坑孔,能夠?qū)崿F(xiàn)非接觸,具有良好的潤滑性能和密封性能。然而,目前對激光加工多孔端面機械密封的研究少有文獻報道。本文通過建立激光加工多孔端面機械密封的理論分析模型,采用MATLAB求解雷諾方程,獲得在給定工況下泄漏量、摩擦功耗等密封性能參數(shù)數(shù)值,并分析不同微孔深度、微孔深度和微孔密度對其密封性能參數(shù)的影響規(guī)律,得到微孔深度、微孔深度和微孔密度的最佳值。主要研究內(nèi)容和結(jié)論如下: 1.建立了激光加工多孔端面機械密封的流體動力學分析模型,根據(jù)假設(shè),一個孔欄上的液膜壓力分布可表征整個密封面上的液膜壓力。將參數(shù)進行無量綱化,采用有限差分法對激光加工多孔端面機械密封進行了詳盡地分析和參數(shù)研究,并利用Matlab計算機軟件得到了液膜壓力、泄漏量、摩擦功耗等密封性能參數(shù)值。 2.對激光加工多孔端面機械密封的液膜壓力進行了深入研究。通過理論計算及分析,研究了結(jié)構(gòu)參數(shù)微孔半徑、微孔深度和微孔密度對液膜壓力的的影響。結(jié)果表明,在給定工況條件下,對微孔深度、微孔深度和微孔密度進行優(yōu)化,可使端面間的液膜壓力達到最佳值。 3.理論推導得到了激光加工多孔端面機械密封的泄漏量計算公式,并進行了理論計算與分析,結(jié)果表明:微孔深度和微孔密度對密封端面間的泄漏量有很大影響。因此,為了增大密封動壓效應(yīng),降低能耗,減少泄漏量,微孔深度和微孔密度應(yīng)選擇一合適值。 4.通過計算得到摩擦功耗的計算公式,分析得到了最佳的微孔結(jié)構(gòu)參數(shù)值,為激光加工多孔端面機械密封工程優(yōu)化設(shè)計提供了可靠的理論依據(jù)。
[Abstract]:The mechanical seal of laser - machined porous end face is a new type of seal . It is a kind of new type of seal which can realize non - contact and good lubricating performance and sealing performance on the end face of the common mechanical seal . However , the influence of different micropore depth , micropore depth and micropore density on the sealing performance parameters is obtained . The main research contents and conclusions are as follows : 1 . A fluid dynamic analysis model for the mechanical seal of the porous end face of laser processing is established . According to the assumption , the pressure distribution of the liquid film on one orifice can characterize the pressure of the liquid film on the whole sealing surface . The parameters are dimensionless . The mechanical seal of the porous end face of the laser machining is analyzed and the parameters are studied by the finite difference method , and the parameters such as liquid film pressure , leakage amount , friction power consumption and the like are obtained by using Matlab computer software . 2 . The influence of pore radius , micropore depth and micropore density on liquid membrane pressure was studied by theoretical calculation and analysis . The results show that the pore depth , the micropore depth and the micropore density are optimized under the condition of given operating conditions , so that the liquid membrane pressure between the end surfaces can be optimized . 3 . Theoretical calculation and analysis of the leakage amount of the mechanical seal of the porous end face of laser processing are derived . The results show that the micropore depth and the micropore density have great influence on the leakage amount between the sealing end surfaces . Therefore , in order to increase the seal dynamic pressure effect , reduce the energy consumption , reduce the leakage amount , the micropore depth and the micropore density should select a suitable value . 4 . By calculating the calculation formula of the friction power consumption , the optimum parameter value of the micropore structure is obtained , which provides a reliable theoretical basis for the optimization design of the mechanical seal engineering of the laser machining porous end face .

【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH136

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