發(fā)布時(shí)間：2018-07-01 10:52

  本文選題：上游泵送 + 端面密封��； 參考：《中國石油大學(xué)》2011年碩士論文

【摘要】：隨著國民經(jīng)濟(jì)的快速發(fā)展,工業(yè)化程度的進(jìn)一步提高,高溫、高壓、高速的工作狀況使機(jī)械密封端面溫升過高,造成密封環(huán)的非正常磨損、熱裂、變形及端面間介質(zhì)汽化等問題,導(dǎo)致密封迅速失效,傳統(tǒng)的密封方法和相關(guān)制造技術(shù)很難再適應(yīng)密封行業(yè)的發(fā)展。因此,對(duì)端面密封形式和制造技術(shù)的研究非常重要,其直接決定著密封性能和質(zhì)量的高低。作為近年新出現(xiàn)的密封方式——上游泵送機(jī)械密封,它具有磨損少、發(fā)熱小、壽命長(zhǎng)、能耗低等優(yōu)點(diǎn),特別適用于高參數(shù)、易汽化、高危險(xiǎn)性及高污染性等高難密封場(chǎng)合,具有廣闊的發(fā)展前景。為達(dá)到高質(zhì)量和可靠的密封效果,通常要求在上游泵送機(jī)械密封環(huán)上開出的流體動(dòng)壓槽(通常為幾至十幾微米)。由于槽的加工技術(shù)要求很高,所以可靠的加工工藝方法是保證該密封工作性能的關(guān)鍵技術(shù)之一。 當(dāng)前,上游泵送機(jī)械密封流體動(dòng)壓槽加工方法主要集中在特種加工領(lǐng)域,如化學(xué)腐蝕加工、激光加工等。這些加工方法都是采用去除材料的方法來加工流體動(dòng)壓槽的,難于加工出表面粗糙度達(dá)鏡面以上的槽底面及高等深性的槽深等,阻礙了上游泵送機(jī)械密封質(zhì)量的進(jìn)一步提高,因此研究開發(fā)高效、高質(zhì)量、低成本的上游泵送機(jī)械密封流體動(dòng)壓槽加工技術(shù)有著十分重要的技術(shù)和經(jīng)濟(jì)意義。 本文首先對(duì)上游泵送機(jī)械密封進(jìn)行整體設(shè)計(jì),在此基礎(chǔ)上重點(diǎn)對(duì)密封槽進(jìn)行設(shè)計(jì),得到優(yōu)化后的槽型,進(jìn)而利用PRO/E軟件建模,得到三維模型;而后對(duì)相關(guān)加工工藝進(jìn)行研究,獲得加工材料性能參數(shù),為后續(xù)動(dòng)壓槽的變形加工制造奠定材料基礎(chǔ);最后,在分析設(shè)計(jì)和加工工藝研究的基礎(chǔ)上加工出實(shí)物模型。本文重點(diǎn)分析研究了動(dòng)壓槽的加工工藝,特別是在加工制造上獨(dú)辟蹊徑,首次提出了采用納米增材制造的方法來加工制造上游泵送機(jī)械密封流體動(dòng)壓槽的新構(gòu)想,可有效地避免現(xiàn)有的一些開槽工藝的缺點(diǎn),并為其它新型機(jī)械密封的研究開發(fā)提供可靠的加工制造工藝。
[Abstract]:With the rapid development of the national economy and the further improvement of industrialization, the working conditions of high temperature, high pressure and high speed make the temperature rise too high on the end face of the mechanical seal, resulting in abnormal wear and tear of the seal ring. The problems of deformation and vaporization of the medium between the end surfaces lead to the rapid failure of the seal. It is difficult for the traditional sealing methods and related manufacturing technology to adapt to the development of the sealing industry. Therefore, it is very important to study the seal form and manufacturing technology, which directly determines the sealing performance and quality. As a new sealing method in recent years, upstream pump mechanical seal has the advantages of less wear, less heat, long life and low energy consumption. It is especially suitable for high parameter, easy vaporization, high danger and high pollution, etc. It has broad prospects for development. In order to achieve high quality and reliable sealing effect, the hydraulic pressure groove (usually several to ten microns) is usually required on the upstream pumping mechanical seal ring. The reliable processing method is one of the key technologies to ensure the sealing performance because of the high requirement of the groove processing technology. At present, the machining methods of upstream pumping mechanical seal hydrodynamic grooves are mainly concentrated in special processing fields, such as chemical etching processing, laser processing and so on. These machining methods all adopt the method of material removal to process hydrodynamic grooves. It is difficult to process the bottom surface of the grooves with surface roughness above the mirror surface and the deep groove depth, which hinders the further improvement of the sealing quality of the upstream pumping machinery. Therefore, the research and development of high efficiency, high quality and low cost upstream pump mechanical seal hydrodynamic groove processing technology has very important technical and economic significance. In this paper, the overall design of the upstream pump mechanical seal is first carried out, and on this basis, the seal groove is designed, and the optimized groove is obtained, and then the three-dimensional model is obtained by using the Pro-E software, and then the related processing technology is studied. The performance parameters of the machining materials are obtained to lay the material foundation for the deformation and manufacture of the hydrodynamic grooves. Finally, the physical model is processed on the basis of the analysis and design and the research of the processing technology. In this paper, the processing technology of the dynamic pressure groove is analyzed and studied, especially in the manufacturing of the hydrodynamic groove, and a new idea is put forward for the first time to process and manufacture the hydrodynamic pressure groove of the upstream pump mechanical seal by using the method of nano-augmentation manufacture. It can effectively avoid the shortcomings of some existing slotted technology and provide reliable processing and manufacturing technology for the research and development of other new mechanical seals.
【學(xué)位授予單位】：中國石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH136

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