【摘要】：游梁式抽油機(jī)在現(xiàn)有采油機(jī)械中占絕大多數(shù),針對(duì)其傳統(tǒng)設(shè)計(jì)方法(自底向上)效率低,而采用自頂向下設(shè)計(jì)方法設(shè)計(jì)游梁式抽油機(jī)研究較少,因此本文根據(jù)抽油機(jī)基本參數(shù)信息,對(duì)游梁式抽油機(jī)進(jìn)行自頂向下參數(shù)化設(shè)計(jì),為減少設(shè)計(jì)成本,縮短產(chǎn)品設(shè)計(jì)周期具有重要意義。針對(duì)抽油機(jī)是個(gè)多構(gòu)件的系統(tǒng),其在工作過程中,抽油機(jī)的關(guān)鍵部件,尤其是連桿易在循環(huán)交變載荷下發(fā)生疲勞破壞。目前對(duì)抽油機(jī)關(guān)鍵部件進(jìn)行疲勞預(yù)測一般采用靜態(tài)施加載荷方法,這種方法分析不夠準(zhǔn)確,與實(shí)際不相符。因此如何使用動(dòng)態(tài)方法對(duì)抽油機(jī)關(guān)鍵部件進(jìn)行疲勞壽命研究,對(duì)其疲勞預(yù)測具有重要意義。本文以一種游梁式抽油機(jī)為研究對(duì)象,對(duì)其進(jìn)行了自頂向下設(shè)計(jì)和聯(lián)合仿真研究,具體研究工作及成果,主要體現(xiàn)有以下幾個(gè)方面。(1)以Creo軟件為平臺(tái),運(yùn)用自頂向下的設(shè)計(jì)方法對(duì)該型游梁式抽油機(jī)進(jìn)行參數(shù)化設(shè)計(jì)。針對(duì)抽油機(jī)結(jié)構(gòu)復(fù)雜性,對(duì)其劃分為四大模塊。對(duì)每個(gè)模塊建立子骨架模型,以此為中間樞紐傳遞頂層設(shè)計(jì)信息,保證了整個(gè)設(shè)計(jì)過程中數(shù)據(jù)緊密聯(lián)系。采用此設(shè)計(jì)方法實(shí)現(xiàn)了模型快速設(shè)計(jì)效果,縮短了產(chǎn)品設(shè)計(jì)周期,使游梁式抽油機(jī)的設(shè)計(jì)效率大幅提升。(2)利用Mathcad參數(shù)計(jì)算與Creo之間參數(shù)傳遞完成了游梁式抽油機(jī)設(shè)計(jì)計(jì)算和模型設(shè)計(jì)。此設(shè)計(jì)方法從游梁式抽油機(jī)參數(shù)計(jì)算到其裝配模型的形成,全過程若有參數(shù)計(jì)算,則其結(jié)果就能及時(shí)傳遞到幾何模型上,且快速又準(zhǔn)確,此設(shè)計(jì)方法彌補(bǔ)了傳統(tǒng)設(shè)計(jì)計(jì)算的不足,促進(jìn)了設(shè)計(jì)效率的提高。(3)基于AMESim軟件中建立了游梁式抽油機(jī)系統(tǒng)的1D仿真模型,仿真分析了懸點(diǎn)運(yùn)動(dòng)和動(dòng)力特性,將仿真得出的懸點(diǎn)位移、速度、加速度和載荷結(jié)果,與理論計(jì)算進(jìn)行了對(duì)比分析,驗(yàn)證了其準(zhǔn)確性。(4)在Motion軟件中建立了游梁式抽油機(jī)的多剛體動(dòng)力學(xué)模型,并基于AMESim 1D和Motion 3D聯(lián)合仿真的方法,對(duì)游梁式抽油機(jī)進(jìn)行了動(dòng)力學(xué)仿真分析,得到了驢頭懸點(diǎn)的運(yùn)動(dòng)規(guī)律以及抽油機(jī)四連機(jī)構(gòu)各鉸接處受力、減速器齒輪嚙合力等主要?jiǎng)討B(tài)作用力的時(shí)間歷程。(5)對(duì)連桿柔性化的游梁式抽油機(jī)進(jìn)行了剛?cè)狁詈蟿?dòng)力學(xué)仿真分析,得到了連桿的固有特性,表明了連桿本體中部固有振幅最大。通過將剛?cè)狁詈蟿?dòng)力學(xué)仿真結(jié)果與剛體動(dòng)力學(xué)仿真結(jié)果對(duì)比分析,發(fā)現(xiàn)連桿柔性化之后能夠更加真實(shí)地反映出連桿系的動(dòng)態(tài)特性。對(duì)連桿進(jìn)行應(yīng)力、變形分析表明,連桿上的最大應(yīng)力處位于連桿桿體結(jié)構(gòu)過渡圓角處,最大變形發(fā)生在連桿結(jié)構(gòu)兩端部。(6)利用剛?cè)狁詈蟿?dòng)力學(xué)計(jì)算的結(jié)果,得出連桿的模態(tài)參與因子,將模態(tài)參與因子與模態(tài)進(jìn)行線性疊加,得到連桿的載荷歷程,并將其作為疲勞分析輸入數(shù)據(jù),利用Virtaul.Lab的Durability模塊對(duì)連桿進(jìn)行了系統(tǒng)級(jí)疲勞分析,獲得準(zhǔn)確地的連桿疲勞壽命值和損傷分布,確定了連桿疲勞損傷位置。研究結(jié)果可為抽油機(jī)關(guān)鍵部件疲勞壽命研究提供重要參考。此方法也為相似機(jī)械產(chǎn)品開發(fā)早期的疲勞損傷位置和疲勞壽命的預(yù)測提供了參考,同樣對(duì)其它相關(guān)領(lǐng)域很實(shí)用。
[Abstract]:The beam pumping unit occupies an overwhelming majority in the existing oil production machinery. In view of its traditional design method (bottom up), the efficiency is low, and the design of beam pumping unit with the top down design method is less. Therefore, based on the basic parameter information of the pumping unit, this paper makes a top-down parameterized design for the beam pumping unit, in order to reduce the design. It is of great significance to shorten the design cycle of the product. In the process of the pumping unit, the key components of the pumping unit, especially the connecting rod, are prone to fatigue damage under cyclic alternating load. At present, the fatigue prediction of the key components of the pumping unit is used as a static loading method, this method is analyzed. It is not accurate enough and does not agree with the actual situation. So how to use dynamic method to study the fatigue life of the key components of the pumping unit is of great significance to its fatigue prediction. In this paper, a beam pumping unit is used as the research object. The next few aspects. (1) take the Creo software as the platform, use the top-down design method to design this type of beam pumping unit. According to the complexity of the pumping unit, it is divided into four modules. A subframework model is set up for each module to pass the top layer design information for the middle hub and ensure the number of the whole design process. According to the close connection, the design method of the model can be realized quickly, the design cycle of the product is shortened and the design efficiency of the beam pumping unit is greatly improved. (2) the design calculation and model design of the beam pumping unit are completed by Mathcad parameter calculation and Creo parameter transfer. The design method is from the beam pumping unit parameters. To calculate the formation of the assembly model, if the whole process is calculated, the result can be transferred to the geometric model in time, and it is fast and accurate. The design method makes up the shortage of the traditional design and improves the design efficiency. (3) based on the AMESim software, the 1D simulation model of the beam pumping unit is built. The suspension point motion and dynamic characteristics are analyzed. The results of the suspended point displacement, velocity, acceleration and load are compared with the theoretical calculation. The accuracy is verified by the theoretical calculation. (4) the multi rigid body dynamic model of the beam pumping unit is established in the Motion software, and the beam pumping is based on the joint simulation of AMESim 1D and Motion 3D. The dynamic simulation analysis of the oil machine is carried out. The motion law of the hanging point of the donkey head and the time history of the main dynamic forces, such as the force of the hinge joints at the four linkage mechanism of the pumping unit, the gear meshing force of the reducer, etc.. (5) the rigid flexible coupling dynamics simulation analysis is carried out on the flexible beam pumping unit of the connecting rod, and the inherent characteristics of the connecting rod are obtained. It shows the maximum inherent amplitude in the central part of the connecting rod. By comparing the simulation results of rigid flexible coupling dynamics with the simulation results of rigid body dynamics, it is found that after the connecting rod is flexible, the dynamic characteristics of the connecting rod system can be more truly reflected. The stress on the connecting rod and the deformation analysis show that the maximum stress on the connecting rod is located in the rod body. The maximum deformation occurs at the two ends of the connecting rod structure at the transition angle of the structure. (6) the modal participation factor of the connecting rod is obtained by the results of the rigid flexible coupling dynamic calculation. The modal participation factor and the modal are linear superimposed, and the load history of the connecting rod is obtained, and it is used as the fatigue analysis input data, and the Durability module of Virtaul.Lab is used. The fatigue life value and damage distribution of the connecting rod are obtained, and the fatigue damage position of the connecting rod is determined. The results can provide an important reference for the study of the fatigue life of the key components of the pumping unit. This method also predicts the early fatigue damage position and fatigue life of the similar mechanical product. For reference, it is also useful for other related fields.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE933.1

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本文編號(hào)：2123999