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

  更多相關(guān)文章： 機(jī)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(jī)械密封是一種新型密封,它是在普通機(jī)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(jī)械密封的研究少有文獻(xiàn)報道。本文通過建立激光加工多孔端面機(jī)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(jī)械密封的流體動力學(xué)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(jìn)行無量綱化,采用有限差分法對激光加工多孔端面機(jī)械密封進(jìn)行了詳盡地分析和參數(shù)研究,并利用Matlab計算機(jī)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(jī)械密封的液膜壓力進(jìn)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(jìn)行優(yōu)化,可使端面間的液膜壓力達(dá)到最佳值。 3.理論推導(dǎo)得到了激光加工多孔端面機(jī)械密封的泄漏量計算公式,并進(jìn)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(jī)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(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH136

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本文編號：1371098