本文選題：雙螺桿泵　切入點(diǎn)：參數(shù)化　出處：《天津理工大學(xué)》2013年碩士論文

【摘要】：近年來隨著螺桿機(jī)械發(fā)展越來越迅猛，種類越來越繁多，其發(fā)揮的作用也越來越大。螺桿泵、螺桿壓縮機(jī)等都是螺桿機(jī)械的典型代表。其中，，雙螺桿泵由于其具有其他類型泵不可取代的特點(diǎn)，在船舶、石油化工等行業(yè)得到廣泛應(yīng)用，隨著科技和工業(yè)的不斷發(fā)展，對(duì)大排量船用雙螺桿泵的需求越來越多。雙螺桿泵的傳動(dòng)部分是雙螺桿泵主要的工作部分，對(duì)雙螺桿泵的流量、效率等性能起決定性作用，它主要包括齒輪、軸、螺旋套、軸承等，其中螺旋套對(duì)泵的流量、壓力等性能有很大的影響。本文主要對(duì)大排量雙螺桿泵中的傳動(dòng)部分進(jìn)行優(yōu)化設(shè)計(jì)。主要內(nèi)容包括： 1、對(duì)雙螺桿泵傳動(dòng)部分進(jìn)行三維建模。在同步齒輪的建模過程中，由于齒輪的齒根圓和基圓的大小關(guān)系不同，研發(fā)了一種新的齒輪的建模方法。并且建立出軸、螺旋套以及傳動(dòng)部分裝配體的三維模型。 2、對(duì)齒輪進(jìn)了靜力學(xué)分析及優(yōu)化。首先通對(duì)齒輪的輪齒部分進(jìn)行了靜力學(xué)分析，驗(yàn)證輪齒是否滿足工作要求；以齒輪輕量化為目標(biāo)，確定出優(yōu)化的約束條件，再對(duì)選取的優(yōu)化參數(shù)進(jìn)行敏感度分析，找出影響齒輪質(zhì)量的較大的參數(shù)，而后對(duì)其進(jìn)行輕量化設(shè)計(jì)。 3、對(duì)主動(dòng)軸進(jìn)行了靜力學(xué)分析及改進(jìn)。本文通過對(duì)主動(dòng)軸進(jìn)行靜力學(xué)和模態(tài)的分析，得出其應(yīng)力、應(yīng)變的分布云圖以及主動(dòng)軸發(fā)生共振的頻率。根據(jù)分析結(jié)果對(duì)主動(dòng)軸結(jié)構(gòu)進(jìn)行改進(jìn)。對(duì)主動(dòng)軸進(jìn)行改進(jìn)，以降低主動(dòng)軸的最大應(yīng)力為目標(biāo)，選取相關(guān)參數(shù)，進(jìn)行敏感度分析，然后根據(jù)靜力學(xué)分析的結(jié)果確定出優(yōu)化的約束條件完成對(duì)主動(dòng)軸結(jié)構(gòu)進(jìn)行優(yōu)化，減小軸的最大應(yīng)力。 4、由于雙螺桿泵零件多、空間小要對(duì)雙螺桿泵傳動(dòng)部分運(yùn)動(dòng)仿真分析及干涉檢測(cè)，驗(yàn)證傳動(dòng)結(jié)構(gòu)中的零件不發(fā)生干涉現(xiàn)象。 本文通過對(duì)雙螺桿泵傳動(dòng)機(jī)構(gòu)的建模、有限元分析及優(yōu)化形成了一條支持雙螺桿泵傳動(dòng)部分設(shè)計(jì)的計(jì)算機(jī)輔助設(shè)計(jì)技術(shù)路線，有較大的工程意義。
[Abstract]:In recent years, with the rapid development of screw machinery, there are more and more kinds of screw machinery, and it plays a more and more important role.Screw pump, screw compressor and so on are typical representatives of screw machinery.Among them, double screw pump is widely used in ship, petrochemical and other industries because of its irreplaceable characteristics. With the development of science and technology and industry, there is more and more demand for large displacement double screw pump.The driving part of the double screw pump is the main working part of the double screw pump, which plays a decisive role in the flow and efficiency of the double screw pump. It mainly includes gear, shaft, spiral sleeve, bearing, etc.Pressure and other properties have a great impact.This article mainly carries on the optimization design to the transmission part in the large displacement double screw pump.The main elements include:1. The three-dimensional modeling of the drive part of double screw pump is carried out.In the modeling process of synchronous gear, a new modeling method of gear is developed because of the difference between the root circle and the base circle of the gear.The three-dimensional model of shaft, helical sleeve and drive part assembly is established.2. Static analysis and optimization of gear are carried out.Firstly, the static analysis of gear tooth part is carried out to verify whether the gear tooth meets the working requirements, and the optimized constraint condition is determined with the light weight of gear as the target, and then the sensitivity analysis of the selected optimization parameters is carried out.Find out the larger parameters which affect the gear quality, and then carry on the lightweight design to it.3. The static analysis and improvement of the drive shaft are carried out.Based on the static and modal analysis of the main shaft, the distribution of the stress and strain and the resonance frequency of the shaft are obtained in this paper.According to the analysis results, the structure of the drive shaft is improved.The aim of this paper is to reduce the maximum stress of the shaft, select the relevant parameters and analyze the sensitivity of the shaft. Then, according to the results of static analysis, the optimized constraint conditions are determined to optimize the structure of the shaft.Reduce the maximum stress on the axis.4. Because of the large number of parts of double screw pump, the motion simulation analysis and interference detection of the driving part of double screw pump should be carried out to verify that there is no interference phenomenon in the part of transmission structure.Based on the modeling of the driving mechanism of the double screw pump, the finite element analysis and optimization have formed a technical route of computer aided design to support the design of the drive part of the double screw pump, which is of great engineering significance.
【學(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH327

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