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Effect of blade coating on a centrifugal pump operation under sediment-laden water flow
ID
Wang, Yong
(
Author
),
ID
Zhang, Zilong
(
Author
),
ID
Chen, Jie
(
Author
),
ID
Liu, Houlin
(
Author
),
ID
Zhang, Xiang
(
Author
),
ID
Hočevar, Marko
(
Author
)
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https://www.sv-jme.eu/sl/article/effect-of-blade-coating-on-a-centrifugal-pump-operation-under-sediment-laden-water-flow/
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Abstract
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
Language:
English
Keywords:
blade coating
,
vibration
,
pressure fluctuation
,
sediment-laden flow
,
centrifugal pump
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Publication status:
Published
Publication version:
Version of Record
Year:
2020
Number of pages:
Str. 591-601
Numbering:
Vol. 66, no. 10
PID:
20.500.12556/RUL-121676
UDC:
621.67(045)
ISSN on article:
0039-2480
DOI:
10.5545/sv-jme.2020.6707
COBISS.SI-ID:
33660163
Publication date in RUL:
22.10.2020
Views:
974
Downloads:
348
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Record is a part of a journal
Title:
Strojniški vestnik
Shortened title:
Stroj. vestn.
Publisher:
Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
ISSN:
0039-2480
COBISS.SI-ID:
762116
Secondary language
Language:
Slovenian
Title:
Učinek prevlek lopatic na delovanje centrifugalnih črpalk pri toku z usedlinami
Keywords:
centrifugalna črpalka
,
obraba
,
prevleka lopatic
,
vibracije
,
fluktuacije tlaka
,
tok z usedlinami
Projects
Funder:
Other - Other funder or multiple funders
Funding programme:
National Natural Science Foundation of China
Project number:
51979126
Funder:
Other - Other funder or multiple funders
Funding programme:
National Natural Science Foundation of China
Project number:
51779106
Funder:
Other - Other funder or multiple funders
Funding programme:
Priority Academic Program Development of Jiangsu Higher Education Institutions, Ministry of Education, Xihua University
Project number:
szjj2016-068
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0401
Name:
Energetsko strojništvo
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