The Experts below are selected from a list of 2124 Experts worldwide ranked by ideXlab platform

Sesto S. Giovanni - One of the best experts on this subject based on the ideXlab platform.

  • Vibration, Noise and Structural Dynamics ‘99 242 MULTISTAGE HORIZONTAL BOILER FEED PUMPS: ROTOR DYNAMIC AND STRUCTURAL ADVANTAGES OF THE OPPOSITE VERSUS EQUIDIRECTIONAL IMPELLERS CONFIGURATION
    2014
    Co-Authors: G. Agrati, A. Piva, Weir Gabbioneta, Sesto S. Giovanni
    Abstract:

    Multistage horizontal boiler feed pumps are designed and built in two different configurations: with equidirectional or with opposite impellers. Advantages and disadvantages of the two design criteria are hereto analysed and described. The study is carried out from hydraulic and structural point of view. A particular attention is addressed to the axial load balance and to the lateral dynamic analysis, with new and worn clearance conditions. A complete calculation of rotor dynamic behaviour in both configurations has been performed using the finite element method. The model of the shaft has been meshed using beam elements, while linearised coefficients have been evaluated in order to simulate stiffness and damping of sleeve bearings, impeller wear rings, balancing drums and interstage seals. Undamped Critical Speed Map, damped mode shapes and Campbell diagrams are presented and discussed. Calculation results are confirmed by experimental measurements carried out on an opposite impeller multistage pump, where non contacting probes have been installed nearby sleeve bearings locations, and order tracking method has been applied during start-up and coast-down transients

G. Agrati - One of the best experts on this subject based on the ideXlab platform.

  • Vibration, Noise and Structural Dynamics ‘99 242 MULTISTAGE HORIZONTAL BOILER FEED PUMPS: ROTOR DYNAMIC AND STRUCTURAL ADVANTAGES OF THE OPPOSITE VERSUS EQUIDIRECTIONAL IMPELLERS CONFIGURATION
    2014
    Co-Authors: G. Agrati, A. Piva, Weir Gabbioneta, Sesto S. Giovanni
    Abstract:

    Multistage horizontal boiler feed pumps are designed and built in two different configurations: with equidirectional or with opposite impellers. Advantages and disadvantages of the two design criteria are hereto analysed and described. The study is carried out from hydraulic and structural point of view. A particular attention is addressed to the axial load balance and to the lateral dynamic analysis, with new and worn clearance conditions. A complete calculation of rotor dynamic behaviour in both configurations has been performed using the finite element method. The model of the shaft has been meshed using beam elements, while linearised coefficients have been evaluated in order to simulate stiffness and damping of sleeve bearings, impeller wear rings, balancing drums and interstage seals. Undamped Critical Speed Map, damped mode shapes and Campbell diagrams are presented and discussed. Calculation results are confirmed by experimental measurements carried out on an opposite impeller multistage pump, where non contacting probes have been installed nearby sleeve bearings locations, and order tracking method has been applied during start-up and coast-down transients

A. Piva - One of the best experts on this subject based on the ideXlab platform.

  • Vibration, Noise and Structural Dynamics ‘99 242 MULTISTAGE HORIZONTAL BOILER FEED PUMPS: ROTOR DYNAMIC AND STRUCTURAL ADVANTAGES OF THE OPPOSITE VERSUS EQUIDIRECTIONAL IMPELLERS CONFIGURATION
    2014
    Co-Authors: G. Agrati, A. Piva, Weir Gabbioneta, Sesto S. Giovanni
    Abstract:

    Multistage horizontal boiler feed pumps are designed and built in two different configurations: with equidirectional or with opposite impellers. Advantages and disadvantages of the two design criteria are hereto analysed and described. The study is carried out from hydraulic and structural point of view. A particular attention is addressed to the axial load balance and to the lateral dynamic analysis, with new and worn clearance conditions. A complete calculation of rotor dynamic behaviour in both configurations has been performed using the finite element method. The model of the shaft has been meshed using beam elements, while linearised coefficients have been evaluated in order to simulate stiffness and damping of sleeve bearings, impeller wear rings, balancing drums and interstage seals. Undamped Critical Speed Map, damped mode shapes and Campbell diagrams are presented and discussed. Calculation results are confirmed by experimental measurements carried out on an opposite impeller multistage pump, where non contacting probes have been installed nearby sleeve bearings locations, and order tracking method has been applied during start-up and coast-down transients

Weir Gabbioneta - One of the best experts on this subject based on the ideXlab platform.

  • Vibration, Noise and Structural Dynamics ‘99 242 MULTISTAGE HORIZONTAL BOILER FEED PUMPS: ROTOR DYNAMIC AND STRUCTURAL ADVANTAGES OF THE OPPOSITE VERSUS EQUIDIRECTIONAL IMPELLERS CONFIGURATION
    2014
    Co-Authors: G. Agrati, A. Piva, Weir Gabbioneta, Sesto S. Giovanni
    Abstract:

    Multistage horizontal boiler feed pumps are designed and built in two different configurations: with equidirectional or with opposite impellers. Advantages and disadvantages of the two design criteria are hereto analysed and described. The study is carried out from hydraulic and structural point of view. A particular attention is addressed to the axial load balance and to the lateral dynamic analysis, with new and worn clearance conditions. A complete calculation of rotor dynamic behaviour in both configurations has been performed using the finite element method. The model of the shaft has been meshed using beam elements, while linearised coefficients have been evaluated in order to simulate stiffness and damping of sleeve bearings, impeller wear rings, balancing drums and interstage seals. Undamped Critical Speed Map, damped mode shapes and Campbell diagrams are presented and discussed. Calculation results are confirmed by experimental measurements carried out on an opposite impeller multistage pump, where non contacting probes have been installed nearby sleeve bearings locations, and order tracking method has been applied during start-up and coast-down transients

Fatkur Rachmanu - One of the best experts on this subject based on the ideXlab platform.

  • STUDI DINAMIKA ROTOR POMPA PENGISI AIR KETEL (BFWP) 6 TINGKAT MENGGUNAKAN PERANGKAT LUNAK
    Universitas Muria Kudus, 2017
    Co-Authors: Fatkur Rachmanu
    Abstract:

    Pompa multi tingkat untuk mengatasi kebutuhan fluida cair agar dapat mengalirkan ke tempat yang elevasinya sangat tinggi atau sangat jauh atau mempunyai perbedaan tekanan terhadap sisi masuk dan keluar pompa yang sangat tinggi. Pompa multi tingkat digunakan sebagai pompa pengisi air ketel (Boiler Feed Water Pump) dengan 6 buah/tingkat baling-baling (impeller) dan di hubungkan dengan kopling menggunakan penggerak mula turbin uap yang mempunyai variasi kecepatan 4000 rpm   hingga 6000 rpm. Dengan daya input pompa sebesar 831.050 Watt. Torsi putar untuk putaran 6000 Rpm adalah 1323,33 Nm. Ditopang hydrodynamic bearing di kedua ujung poros. Pada penelitian ini diamati frekuensi pribadi pada poros rotor, menentukan modeshape poros rotor (Critical Speed Map ), respon takseimbang (Unbalance response) pada bearing station. Menggunakan Software-X berupa perhitungan perangkat lunak dinamika rotor dibandingkan dengan software Solidworksmenggunakan metode elemen hingga. Studi dinamika rotor mempunyai kecepatan kritis sebesar 2750 CPM dengan kekakuan bearing 1x106 lbf/inchi pada mode 1. Pada mode no.7 akan terjadi simpangan amplitudo yang besar