Temat: wirnik - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Static and dynamic analysis of a pump impeller with a balancing device. Part I: static analysis
Autorzy:: Kundera, C.
Martsinkovsky, V. A.
Powiązania:: https://bibliotekanauki.pl/articles/955217.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: pompa wirowa
analiza statyczna
wirnik
pump impeller
balance device
static analysis
Opis:: This part of the work presents the design and static analysis of an impeller for a single-stage pump. The impeller is directly connected with a balancing device. The impeller needs to have a properly designed system of longitudinal and lateral clearances on both sides. With the simplifying assumptions concerning the flow and distribution of pressure in the longitudinal and lateral clearances, the static analysis involved deriving relationships between the impeller geometry and the basic performance parameters of the pump. A numerical example was used to show the calculation procedure of static characteristics for the predetermined parameters.
Źródło:: International Journal of Applied Mechanics and Engineering; 2014, 19, 3; 609-619
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Static and dynamics of a pump impeller with a balancing device. Part II: dynamic analysis
Autorzy:: Martsinkovsky, V. A.
Zhulyov, A.
Kundera, C.
Powiązania:: https://bibliotekanauki.pl/articles/955212.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: pompa wirowa
wirnik
analiza dynamiczna
dynamic analysis
pump impeller
balance device
stability condition
Opis:: This paper presents the theoretical study of the system comprising an impeller and a balancing device. It deals with the dynamic analysis of the system, i.e., the axial vibrations of the impeller, and the system stability. The dynamic analysis took into account linearized hydrodynamic forces and moments generated in the longitudinal clearances of the seals of the impeller. The theoretical analysis was supplemented with a numerical example with characteristics determined for a real single-stage centrifugal pump.
Źródło:: International Journal of Applied Mechanics and Engineering; 2014, 19, 3; 621-631
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of forced spatial vibrations of a centrifugal pump impeller with axial forces balancing device
Autorzy:: Zhulyov, A.
Martsinkovsky, V.
Kundera, C.
Powiązania:: https://bibliotekanauki.pl/articles/265211.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: wibracje
promieniowanie
wirnik
pompa
vibrations–radial
angular
axial
rotor
impeller
partial systems
self-centering
shaftless pump
Opis:: In this paper, a model of a pump impeller with annular seals and a balancing device, used as a combined support-seal assembly, is considered. The forced coupled radial, angular and axial vibrations of the rotor are determined with consideration of linearized inertial, damping, gyroscopic, positional and circulating forces and moments acting on the impeller from the side of the fluid flow in annular seals. The theoretical analysis is supplemented with a numerical example, the amplitude frequency characteristics are shown.
Źródło:: International Journal of Applied Mechanics and Engineering; 2016, 21, 3; 737-750
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Theoretical investigation of stresses induced at blade mounting locations in steam turbine rotor system
Autorzy:: Prasad, D. K.
Ramana, K. V.
Rao, N. M.
Powiązania:: https://bibliotekanauki.pl/articles/947280.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: tarcza wirnika
wirnik turbiny parowej
naprężenie styczne
rotor disc
radial stress
tangential stress
steam turbine rotors
Opis:: One of the most common incipient losses of integrity in mechanical structures is the development and propagation of cracks. Especially in rotating members like steam turbine rotors etc. cracks, because of their potential, cause catastrophic failures and are a grave threat to an uninterrupted operation and performance. A crack may propagate from some small imperfections on the surface of the body or inside of the material and it is most likely to appear in correspondence to high stress concentration. Crack propagation path is generally determined by the direction of maximum stress or by the minimum material strength. Hence determination of stresses induced has been the focus of attention for many researchers. In the present work, development of a mathematical model to determine the stresses induced in a rotating disc of varying thickness is studied. This model is applied to a steam turbine rotor disc to determine the induced stresses and radial deflection. The mathematical modeling results are validated with the results obtained using Ansys package. The results of the present study will be useful in diagnosing the location and magnitude of maximum stress induced in the turbine rotor disc and stress intensity factor due to the presence of crack.
Źródło:: International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 295-307
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Evaluation of the parameters of vibrations during dynamic balancing of the fan rotor according to Polish and International Standards
Autorzy:: Śloderbach, Z.
Powiązania:: https://bibliotekanauki.pl/articles/947331.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: parametry drgań
wirnik wentylatora
normy ISO
wyważanie dynamiczne
parameters of vibrations
ISO standards
fan rotor
dynamic forces
dynamic balancing
Opis:: In the paper a procedure and methodology of acceptable calculations of powers, displacements (of amplitudes) and velocities of pulses according to ISO standards depending on the rotational speeds (frequencies) of rotor during attempts of dynamic breaking down taking into account effectiveness of vibration isolation were described. The proposed method is regarding one-sidedly hung rotors appearing in such appliances as rotors of fans, blowers, pumps and others. As permissible parameters of pulses values which are given in international standards PN-ISO-10816-1:1998P and PN-ISO-7919-1:2001 were assumed. Calculations were compared in the form of tables and they depicted with relevant graphs which have the character of useful nomograms. Also, recommendations for the design of the foundations and guidelines related to dimensions of the foundation, the weight and the way of fixing the device were given. In the end also closing remarks and conclusions were given.
Źródło:: International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 473-483
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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