Assessment of the reliability of structural elements of the rotor of a gas turbine plant
Jazyk: | ruština |
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Rok vydání: | 2022 |
Předmět: | |
DOI: | 10.18720/spbpu/3/2023/vr/vr23-167 |
Popis: | Тема вÑпÑÑкной квалиÑикаÑионной ÑабоÑÑ: «ÐÑенка пÑоÑноÑÑи ÑлеменÑов конÑÑÑÑкÑии ÑоÑоÑа газоÑÑÑбинной ÑÑÑановки».Рданной ÑабоÑе бÑли ÑаÑÑмоÑÑÐµÐ½Ñ Ð²Ð¾Ð¿ÑоÑÑ Ð´Ð»Ð¸ÑелÑной пÑоÑноÑÑи и пÑоÑÐµÐºÐ°Ð½Ð¸Ñ Ð¿Ð¾Ð»Ð·ÑÑеÑÑи в ÑлеменÑÐ°Ñ ÑоÑоÑов газоÑÑÑбиннÑÑ ÑÑÑановок (ÐТУ), а Ñакже ÑаÑÑмоÑÑÐµÐ½Ñ ÑазлиÑнÑе ÑиÑÑÐµÐ¼Ñ Ð¾Ñ Ð»Ð°Ð¶Ð´ÐµÐ½Ð¸Ð¹ диÑков ÑоÑоÑов. ÐадаÑи, коÑоÑÑе бÑли ÑеÑÐµÐ½Ñ Ð² Ñ Ð¾Ð´Ðµ ÑаÑÑмоÑÑÐµÐ½Ð¸Ñ Ð¿Ð¾ÑÑавленнÑÑ Ð²Ð¾Ð¿ÑоÑов в данной ÑабоÑе: 1. ÐолÑÑение ÑаÑÑÑÑнÑÑ 3D-моделей ÑлеменÑов поÑледней ÑÑÑпени газоÑÑÑбинной ÑÑÑановки.2. РаÑÑмоÑÑение ÑеоÑии пÑоÑÐµÐºÐ°Ð½Ð¸Ñ Ð¿Ð¾Ð»Ð·ÑÑеÑÑи в ÑлеменÑÐ°Ñ ÐТУ, а Ñакже вопÑоÑа оÑенки длиÑелÑной пÑоÑноÑÑи.3. Уделено внимание меÑодикам ÑаÑÑÑÑа на пÑоÑноÑÑÑ ÑаÑÑÑÑнÑÑ Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹ ÑлеменÑов ÑÑÑÐ±Ð¸Ð½Ñ Ð² ÑÑловиÑÑ ÑенÑÑобежнÑÑ Ð½Ð°Ð³ÑÑзок и в Ñ Ð¾Ð´Ðµ пÑоÑÐµÐºÐ°Ð½Ð¸Ñ Ð¿Ð¾Ð»Ð·ÑÑеÑÑи.4. ÐÐ±Ð·Ð¾Ñ ÑиÑÑем Ð¾Ñ Ð»Ð°Ð¶Ð´ÐµÐ½Ð¸Ñ, пÑименÑемÑÑ Ð² газовÑÑ ÑÑÑÐ±Ð¸Ð½Ð°Ñ Ð¸ Ð¸Ñ Ð¾Ð±Ñее опиÑÐ°Ð½Ð¸Ñ Ñ ÐºÐ¾Ð½ÑÑÑÑкÑивнÑми оÑобенноÑÑÑми.5. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ ÑаÑÑÑÑÑ Ñ ÑелÑÑ Ð¾Ñенки ÑеÑмиÑеÑкого Ð¿Ð¾Ð»Ñ ÑлеменÑов ÐТУ пÑи налиÑии ÑиÑÑÐµÐ¼Ñ Ð¾Ñ Ð»Ð°Ð¶Ð´ÐµÐ½Ð¸Ñ, а Ñакже оÑенка ÑабоÑего ÑеÑÑÑÑа пÑи ÑазлиÑнÑÑ ÑаÑÑÑÑнÑÑ ÑÐµÐ¶Ð¸Ð¼Ð°Ñ Ð¿Ð¾Ð´Ð°Ñи Ð¾Ñ Ð»Ð°Ð¶Ð´ÐµÐ½Ð¸Ñ.Ðа оÑÐ½Ð¾Ð²Ñ ÑаÑÑÑÑнÑÑ Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹ бÑли взÑÑÑ Ñже полÑÑеннÑе Ñанее ÑаÑÑÑÑнÑе 3D-модели ÑлеменÑов поÑледней ÑÑÑпени ÐТУ моÑноÑÑÑÑ 17 ÐÐÑ Ð½Ð° оÑнове ÑÑÑеÑÑвÑÑÑего пÑоÑоÑипа ÐС-90 Ñ ÑелÑÑ ÑвелиÑÐµÐ½Ð¸Ñ Ð¸Ñ Ð¿ÑоÑноÑÑнÑÑ ÑвойÑÑв. Ðалее бÑло ÑаÑÑмоÑÑено Ñвление пÑоÑÐµÐºÐ°Ð½Ð¸Ñ Ð¿Ð¾Ð»Ð·ÑÑеÑÑи, а Ñакже пÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ ÑооÑвеÑÑÑвÑÑÑие ÑаÑÑÑÑÑ Ð² ÐµÑ ÑÑловиÑÑ Ð´Ð»Ñ Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹. Ðомимо ÑÑого бÑл ÑаÑÑмоÑÑен ÑÑд ÑиÑÑем Ð¾Ñ Ð»Ð°Ð¶Ð´ÐµÐ½Ð¸Ð¹ газовÑÑ ÑÑÑбин.Ð ÑезÑлÑÑаÑе бÑл пÑоизведÑн ÑопÑÑжÑннÑй ÑеÑмодинамиÑеÑкий ÑаÑÑÑÑ Ð¿ÑоÑоÑной ÑаÑÑи (ÐЧ) и ÑабоÑего колеÑа (Ð Ð) поÑледней ÑÑÑпени ÑÑÑÐ±Ð¸Ð½Ñ Ñ Ð´Ð°Ð»ÑнейÑей оÑенкой ÑабоÑего ÑеÑÑÑÑа РРгÑаниÑÐ½Ð¾Ð¼Ñ ÑÑÐ»Ð¾Ð²Ð¸Ñ ÐµÐ³Ð¾ ÑеÑмиÑеÑкого полÑ. РеÑÑÑÑ Ð¾ÑенивалÑÑ Ð¿Ð¾ велиÑинам накопленнÑÑ Â Ð¿Ð»Ð°ÑÑиÑеÑÐºÐ¸Ñ Ð´ÐµÑоÑмаÑий в Ñ Ð¾Ð´Ðµ пÑоÑÐµÐºÐ°Ð½Ð¸Ñ Ð¿Ð¾Ð»Ð·ÑÑеÑÑи. ÐÑло ÑаÑÑмоÑÑено неÑколÑко аналогиÑнÑÑ Ð·Ð°Ð´Ð°Ñ Ð¿Ñи ÑазлиÑнÑÑ Ð·Ð½Ð°ÑениÑÑ Ð¿Ð¾Ð´Ð°Ñи ÑаÑÑ Ð¾Ð´Ð° Ð¾Ñ Ð»Ð°Ð¶Ð´Ð°ÑÑего газа в ÐЧ и, Ñем ÑамÑм, ÑазлиÑнÑÑ ÑеÑмиÑеÑÐºÐ¸Ñ Ð¿Ð¾Ð»ÑÑ Ð Ð. The theme of the final qualifying work: "Assessment of the reliability of structural elements of the rotor of a gas turbine plant."In this paper, the issues of long-term strength and creep in the elements of gas turbine plants (GTP) rotors were considered, as well as various cooling systems for rotor disks. The tasks that were solved during the consideration of the questions posed in this work:1. Obtaining the calculated 3D-models of the elements of the last stage of the gas turbine plant.2. Consideration of the theory of creep in GTP elements, as well as the issue of evaluating long-term strength.3. Attention is paid to methods for calculating the strength of design models of turbine elements under centrifugal loads and in the course of creep.4. Overview of cooling systems used in gas turbines and their general description with design features.5. Calculations were carried out in order to assess the thermal field of GTP elements in the presence of a cooling system, as well as to estimate the working life for various design modes of cooling supply. The calculation models were based on previously obtained calculated 3D-models of the elements of the last stage of a 17 MW gas turbine based on the existing PS-90 prototype in order to increase their strength properties. Further, the phenomenon of creep flow was considered, and the corresponding calculations were carried out in its conditions for models. In addition, a number of gas turbine cooling systems were considered.As a result, a conjugated thermodynamic calculation of the flow path (FC) and the working wheel (WW) of the last turbine stage was made with a further assessment of the working resource of the WW to the boundary condition of its thermal field. The resource was estimated by the values of accumulated plastic deformations in the course of creep. Several similar problems were considered for different values of the cooling gas flow rate in the FC and, thus, different thermal fields of the WW. |
Databáze: | OpenAIRE |
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