PSI - Issue 20

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2018) 000 – 000

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Procedia Structural Integrity 20 (2019) 113–118

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) The development of an operative diagnostic method of the limiting technical condition of the sectional pump hydraulic balancing unit Nickolay Ovchinnikov a, * a North-Eastern federal university, Belinsky Ave., 58, Yakutsk, 677000, Russia Abstract In the conditions of underground kimberlite mines operated by PJSC ALROSA, the main reason for the premature achievement of the limit technical condition by the sectional pump is the intensive abrasive destruction of its basic parts, namely, the shaft, impellers and, in more rare cases, the discharge covers. Mechanical destruction of the above-mentioned parts usually occurs as a result of the operation of a sectional pump with a critical axial displacement of the rotor (2.8 ÷ 3 mm) in the direction of suction, since in such an emergency position of the rotor there is a tribocontact between it and the pump housing elements, which after some period of time leads to serious consequences. Practice shows that in the conditions of underground kimberlitic mines of the Company application of the sensor of measurement of rotor axial shift of the sectional pump intended for identification of growth of the size measured by it to critical values is the effective technical solution only for some period of time. Frequent failures and a certain complexity of reconfiguration of this control and measuring device became the main reasons for reducing the correctness of the results issued to them. Thus, we state that the development of a technique for the identification of the rotor critical axial shift of the sectional pump, the use of which should be an alternative to the use of the above mentioned sensor, is an urgent scientific and practical task at the present time. The solution of this problem will increase the durability of the basic expensive parts of the sectional pump, as well as the level of industrial safety in underground mining of kimberlite ore. This research paper describes in detail the complex of diagnostic features of the sectional pump in critical axial displacement of the rotor, whose introduction into production will allow with a high degree of probability to increase the operational reliability of sectional pumps of drainage systems of underground kimberlitic mines of the PJSC ALROSA. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) The development of an operative diagnostic method of the limiting technical condition of the sectional pump hydraulic balancing unit Nickolay Ovchinnikov a, * a North-Eastern federal university, Belinsky Ave., 58, Yakutsk, 677000, Russia Abstract In condi ions of undergrou d kimberlite mines operated by PJSC ALROSA, the main reason for the p ematur achievement of the limit technical condition by the se tional pump is the i tensiv abrasive destructi n of its basic , namely, the haft, impellers and, in m re rare cases, the discharge covers. Mechan ca d struc i n of the above-mentioned parts usually ccurs as a result of the operation of a sectional pump with a critical axial displacement of the rotor (2.8 ÷ 3 mm) in th dir ction of suction, inc in such an emergency position f the rotor the e is a tribocont ct between it and the pump h sing elements, which after so e period of time leads to seri us consequ nc s. Practice show that in the conditions of u d rground kimberlitic mines of the Company application of the sensor of mea urem nt of rotor axial shift of he sectional pu p inten ed for identification of growth of the size measured by it to crit cal values is e effec ive technical solution only for so period of time. Frequent failures and a certain c mpl xity of reconfiguration of this control and measuring device became the main reasons for reducing the orrectness of the result issued to them. Thus, we state t at the development of a echnique for the identification of the rotor c itical axial shift of the sectional pump, the use of which s ould be a alternative to the use of the abov mentioned sensor, is an urg t scientific and pra tical task at the pr sent ime. The solution of this problem will increase the durability of th bas c expensive parts of the ectional pump, as well as the level of indu trial safety in underground mining of kimberlite ore. This esearch paper describes in detail the c mplex of diagnostic featur s of the sectional pump in critical axial d spl cement of the rotor, whose intr duct on into productio will allow with a high degree of probability to increase the operational reliability of sectional pumps of drainage systems of underground kimberlitic mines of the PJSC ALROSA.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

Keywords: kimberlite mine; sectional pump; wear; axial shift; bearing; temperature; hydraulic balancing; vibration Keywords: kimberlite mine; sectional pump; wear; axial shift; bearing; temperature; hydraulic balancing; vibration

* Corresponding author. Tel.: +7-914-299-7490. E-mail address: ovchinnlar1986@mail.ru * Correspon ing author. Tel.: +7-914-299-7490. E-mail address: ovchinnlar1986@mail.ru

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 2452 3216 © 2019 The Author(s). Publis ed by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.125