Yong Wang (Avtor), Zilong Zhang (Avtor), Jie Chen (Avtor), Houlin Liu (Avtor), Xiang Zhang (Avtor), Marko Hočevar (Avtor)

Povzetek

Applying a high strength coating on a blade's surface could significantly prolong the service life of a centrifugal pump under sediment-laden water flow because of its protection. To explore the effect of blade coating, the characteristics of energy, vibration and pressure fluctuation of a centrifugal pump (the specific speed (ns) is 81.46) with different polyurethane coating thickness coefficients were experimentally studied under sediment-laden water flow. Keeping the blade outlet angle, blade inlet angle and blade shape unchanged, the head H and efficiency [eta] under both sediment-laden flow and clear water flow decrease significantly as the coating thickness coefficient increases. The axis rotating frequency and blade passing frequency are the main excitation frequencies of the pump vibration velocity amplitude and outlet pressure fluctuation. The vibration velocity amplitude and outlet pressure fluctuation at the frequency of 1 BPF are the largest. At the frequency of 1 axis rotating frequency, they are the second in all cases. The peak values of both vibration velocity amplitude and outlet pressure fluctuation are proportional to the coating thickness coefficient. An analysis was performed for several increasing coating thicknesses, corresponding to coating coefficients from K0 to K3. When the coating thickness coefficients are K0, K1, and K2, the peak value of vibration velocity amplitude under sediment-laden flow is larger than that under clear water flow, but the very small difference between them undercoating thickness coefficient K3. The peak values of pressure fluctuations under different flow rates decrease first and then increase with the increasing coating thickness coefficient, and lowest points are all located at the coating thickness coefficient K1

Ključne besede

blade coating;vibration;pressure fluctuation;sediment-laden flow;centrifugal pump;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 621.67(045)
COBISS: 33660163 Povezava se bo odprla v novem oknu
ISSN: 0039-2480
Matična publikacija: Strojniški vestnik
Št. ogledov: 347
Št. prenosov: 232
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarni naslov: Učinek prevlek lopatic na delovanje centrifugalnih črpalk pri toku z usedlinami
Sekundarne ključne besede: centrifugalna črpalka;obraba;prevleka lopatic;vibracije;fluktuacije tlaka;tok z usedlinami;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 591-601, SI 74
Letnik: ǂVol. ǂ66
Zvezek: ǂno. ǂ10
Čas izdaje: Oct. 2020
DOI: 10.5545/sv-jme.2020.6707
ID: 12094431