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RESEARCH ON WEAR BEHAVIOR OF ROTOR-STATOR COUPLE MATERIALS FOR SCREW/PROGRESSIVE CAVITY PUMPS

Volume IX, Issue 2/2023, pp 96 – 106, DOI: 10.37410/EMERG.2023.2.06
Ammar MULLA, Niculae Napoleon ANTONESCU, Razvan George RIPEANU, Marius Gabriel PETRESCU, Ibrahim Naim RAMADAN

Abstract

Pompele cu surub/cavitate progresiva sunt ideale pentru manevrarea/transportul fluidelor ca viscozitati mari, cu tendinte de separare sau de taiere inclusiv in industria petroliera pentru extractia titeiului din sonde, transportul titeiului si produselor petroliere (hidrocarburilor) s.a. [6,7,112,13]. Calitatea/tehnologia acestora s-a imbunatatit datorita folosirii cauciucului sintetic si tehnologiei de elaborare/sudare, fapt pentru care aceste pompe au devenit foarte folosite in industria de petrol si nu numai. Pompa are un rotor in forma de surub si un stator elicoidal. Cele mai bune rezultate s-au obtinut cand rotorul este facut din otel cromat dur, nitrurat sau incarcat cu carburi dure cu procedeul HOVF, iar statorul este facut din amestecuri mixte de cauciuc sau poliamida (elastomeri) [6,7,12,13] s.a.Fabricantii acestor pompe folosesc materiale specifice deoarece standardele ISO nu indica anumite materiale pentru aceste pompe. Prezentrul studiu evalueaza comportarea tribologica a unor amestecuri mixte de cauciuc respectiv poliamide folosite sau propuse pentru stator si otel cromat dur sau netratat pentru rotor.

The screw/progressive cavity pumps are ideal for handling highly viscosity fluid and those with separation or share tendencies, inclusive in petroleum industry to lift crude oil from wells, hydrocarbons, transportation, a.o. [6,7,12,13]. Their quality/technology have improved using synthetic rubber elastomers and soldering advancements, making these prevalent in petroleum industry and not only. The pumps has a screwshaped rotor and helical stator.. The best results achieved when the rotors are made from steels hard crom plated, nitride or hardened with carbide spray process HVOF and the stators are made from rubber mixture materials or polyamide (elastomers) [6,7,12,13, a.o]. Manufactures use specific materials but ISO standards don’t specify rotor metal/steels or stator elastomers. The present study evaluated the tribological behavior of some rubber mixtures, used or proposed for stator and hard chrome plated or not plated steel for rotor.

Keywords

Screw /progressive cavity pumps, friction coefficients, rubber mixtures, wear.

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