本文選題：滾動(dòng)轉(zhuǎn)子式壓縮機(jī) + 滑動(dòng)軸承　； 參考：《華中科技大學(xué)》2012年碩士論文

【摘要】：軸承轉(zhuǎn)子系統(tǒng)是滾動(dòng)轉(zhuǎn)子式壓縮機(jī)中的關(guān)鍵運(yùn)動(dòng)部件，其潤(rùn)滑性能的好壞將直接影響到壓縮機(jī)的整機(jī)性能。因此，開(kāi)展徑向滑動(dòng)軸承流體潤(rùn)滑性能分析研究，對(duì)減少軸承磨損、提高壓縮機(jī)整機(jī)效率與可靠性、降低噪聲與振動(dòng)、延長(zhǎng)使用壽命都具有非常重要的意義。 本文以某型滾動(dòng)轉(zhuǎn)子式壓縮機(jī)為研究對(duì)象，通過(guò)對(duì)壓縮機(jī)曲軸進(jìn)行動(dòng)力學(xué)建模與分析，獲得了壓縮機(jī)主/副軸承在一個(gè)工作循環(huán)內(nèi)所受載荷的變化關(guān)系�；谀Σ翆W(xué)基礎(chǔ)理論，建立了壓縮機(jī)徑向滑動(dòng)軸承流體動(dòng)壓潤(rùn)滑數(shù)值分析模型，該模型考慮了潤(rùn)滑表面粗糙度、潤(rùn)滑油粘溫、粘壓效應(yīng)以及變密度效應(yīng)等影響因素。通過(guò)計(jì)算得到整個(gè)工作循環(huán)內(nèi)油膜厚度、油膜壓力、軸心軌跡、摩擦功耗等潤(rùn)滑性能參數(shù)，并對(duì)主/副軸承流體動(dòng)壓潤(rùn)滑性能進(jìn)行了分析�；趶椥粤W(xué)基礎(chǔ)理論，將流體動(dòng)壓潤(rùn)滑模型與表面法向彈性變形方程聯(lián)立，建立徑向滑動(dòng)軸承彈流潤(rùn)滑數(shù)值分析模型，完成了滑動(dòng)軸承彈流潤(rùn)滑與動(dòng)壓潤(rùn)滑性能的對(duì)比。對(duì)比分析了不同幾何結(jié)構(gòu)參數(shù)（軸頸半徑、軸承間隙、軸承寬度）及運(yùn)行參數(shù)（曲軸轉(zhuǎn)速）對(duì)滑動(dòng)軸承潤(rùn)滑性能的影響。以摩擦功耗和最小油膜厚度為評(píng)價(jià)指標(biāo)，采用正交實(shí)驗(yàn)設(shè)計(jì)法對(duì)軸承幾何結(jié)構(gòu)參數(shù)進(jìn)行了優(yōu)化設(shè)計(jì)，提出了優(yōu)化方案。 研究結(jié)果表明：主軸承摩擦功耗占總摩擦功耗比重較大；增加軸承間隙、減小軸承半徑和軸承寬度可以有效降低主軸承摩擦功耗；增加軸承寬度、軸承半徑可以增加軸承潤(rùn)滑表面接觸面積，降低油膜壓力，增加最小油膜厚度。在設(shè)計(jì)軸承參數(shù)時(shí)，要對(duì)最小油膜厚度和軸承摩擦功耗兩個(gè)評(píng)價(jià)指標(biāo)綜合考慮。在保證最小油膜厚度使?jié)櫥幱诹黧w潤(rùn)滑的前提下，，選取摩擦功耗盡可能低的方案。
[Abstract]:The bearing rotor system is the key moving part in the rolling rotor compressor. Its lubrication performance will directly affect the whole performance of the compressor. Therefore, the analysis and study of the lubrication performance of the radial journal bearing can reduce the wear of the bearing, improve the efficiency and reliability of the compressor, reduce the noise and vibration, and prolong the service life. Life is of great significance.
In this paper, the dynamic modeling and analysis of a compressor crankshaft is taken as the research object. The change relation of the load of the compressor main / auxiliary bearing in a working cycle is obtained. Based on the basic theory of tribology, a numerical model for hydrodynamic lubrication of the compressor radial sliding bearing is established. The model considers the influence factors such as the roughness of the lubricating surface, the viscosity temperature of the lubricating oil, the viscosity pressure effect and the variable density effect. The lubrication performance parameters such as the oil film thickness, the oil film pressure, the axis trajectory, the friction power and so on are calculated, and the hydrodynamic lubrication performance of the main / auxiliary shaft bearing fluid is analyzed. Based on the elastic mechanics basis, the model is calculated. In theory, the hydrodynamic lubrication model and the surface method are combined to the elastic deformation equation, the elastohydrodynamic lubrication numerical model of the radial sliding bearing is established, and the comparison between the elastohydrodynamic lubrication and the dynamic lubrication performance of the sliding bearing is completed. The different geometric structure parameters (axial neck radius, bearing clearance, bearing width) and operating parameters (Qu Zhouzhuan) are compared and analyzed. The effect of speed) on the lubrication performance of the sliding bearing. With the friction power and the minimum oil film thickness as the evaluation index, the orthogonal experimental design method is used to optimize the geometric structure parameters of the bearing, and the optimization scheme is put forward.
The results show that the friction power of the main bearing occupies a large proportion of the total friction power; increasing the bearing clearance, reducing the bearing radius and bearing width can effectively reduce the friction power of the main bearing; increase the bearing width, the bearing radius can increase the contact area of the bearing lubrication surface, reduce the oil film pressure, and increase the minimum oil film thickness. In the design axis, the bearing radius can be increased. When the parameters are supported, the minimum oil film thickness and the friction power consumption of the bearing should be considered synthetically. Under the premise of ensuring the minimum oil film thickness to make the lubrication in the fluid lubrication, the minimum friction power consumption is selected as the lowest possible scheme.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH133.31;TH117.2

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本文編號(hào)：1995516