Patents Assigned to Nuovo Pignone Srl
  • Patent number: 10738789
    Abstract: A turbomachine has a casing where liquid may accumulate; at least one liquid level detector is located inside the casing for automatically detecting liquid accumulated inside the casing during operation of the turbomachine; the liquid level detector may be arranged for detecting one or two or three or four liquid levels inside the casing; the liquid level detector is typically connected to an electronic unit at least for automatically signaling the liquid level. The electronic unit controls at least one valve for automatically discharging the accumulated liquid from the casing; in this way, the status of the turbomachine is not only monitored but also managed.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: August 11, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Giacomo Ragni, Francesco Bongini, Manuele Bigi, Paolo Trallori, Massimiliano Ortiz Neri
  • Patent number: 10724439
    Abstract: A charge gas compression train for ethylene including a first compressor including a first group of compression stages, a second group of compression stages, and a third group of compression stages. The first group of compression stages includes an outlet configured to be connected to a first intercooler inlet. The second group of compression stages includes a second compressor inlet configured to be connected to a first intercooler outlet, and a second compressor outlet configured to be connected to a second intercooler inlet. The third group of compression stages includes a third compressor inlet configured to be connected to a second intercooler outlet. The first, the second, and the third group of compression stages are integrated in a first common casing and operate at the same rotation speed. The first compressor includes a plurality of unshrouded and shrouded impellers, where an unshrouded impeller is positioned upstream to a shrouded impeller.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: July 28, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Clarice Carmone, Nicola Banchi, Giuseppe Iurisci
  • Patent number: 10724528
    Abstract: A cooling system for cooling an integrated, high pressure, motorcompressor unit, the cooling system including a second motorcompressor unit and at least a first duct fluidly connecting a process fluid connection point located at the second motorcompressor unit to at least one process fluid injection point located at the first motor area of the first motorcompressor unit.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: July 28, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Manuele Bigi, Luciano Mei
  • Patent number: 10722996
    Abstract: A polishing method is described for polishing a machine component comprising at least one airfoil portion comprised of a suction side, a pressure side, a leading edge and a trailing edge. The method provides for arranging the machine component in a container and constraining the machine component to the container. A polishing mixture is added in the container, and the container is caused to vibrate together with the machine component constrained thereto, thereby generating a polishing mixture flow along the airfoil portion until a final arithmetic average roughness is achieved.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: July 28, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Lorenzo Bianchi, Lorenzo Lorenzi, Ferruccio Petroni, Paolo Mola
  • Patent number: 10718347
    Abstract: A turbomachinery gasket comprising at least a first curved elongated element having a coupling part configured to cooperate with a tubular assembly in order to keep the gasket in position on the tubular assembly, and an outer surface configured to seal against an outer casing provided to house the tubular assembly, the first curved elongated element comprising a first and a second free end, the first free end providing a first protruding lip and the second free end providing a second protruding lip, the first protruding lip being configured to overlap with the second protruding lip of the first curved elongated element or with a second protruding lip of a second elongated element functionally identical to the first one, so that, when the gasket is in use, a seal in that part of the gasket having said protruding lips is granted.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: July 21, 2020
    Assignee: Nuovo Pignone SRL
    Inventors: Franco Sarri, Andrea Bernocchi, Franco Smorti
  • Patent number: 10711641
    Abstract: A compressor includes a compressor bundle and an outer casing. Between the outer casing and the compressor bundle a thermal shield is provided, for reducing thermal stress and visco-plastic deformation of the casing under severe operating conditions.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: July 14, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Silvio Giachetti, Massimiliano Borghetti, Luca Lombardi
  • Patent number: 10711789
    Abstract: A shaftless motor-compressor is disclosed, comprising a casing and at least one compressor stage arranged in the casing. Each compressor stage comprises a respective impeller arranged for rotation in the casing around a rotation axis. Each impeller is combined with an embedded electric motor housed in the casing and comprised of a motor stator and a motor rotor. The motor stator of each compressor stage circumferentially surrounds the impeller and the motor rotor, integral with the impeller. The motor rotor of each stage is arranged inside the respective motor stator.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: July 14, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Sergio Palomba, Dante Tommaso Rubino
  • Patent number: 10711796
    Abstract: A multistage centrifugal compressor is described. The compressor comprises a casing and a shaft rotatingly supported in the casing by at least a first bearing and a second bearing. At least one in-between-bearing impeller is mounted on the shaft, between the first bearing and the second bearing. An overhung impeller is mounted at one end of the shaft. A first diaphragm arrangement is further located in the casing. The first diaphragm arrangement comprises return a channel assembly with a plurality of stationary return channel blades defining a plurality of return vanes for redirecting compressed gas from an exit location of the overhung impeller to an inlet location of the in-between-bearings impeller. The first diaphragm arrangement houses one of the first bearing and second bearing.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: July 14, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Vittorio Michelassi, Ismail Hakki Sezal, Christian Aalburg
  • Patent number: 10711799
    Abstract: Systems and methods for maintaining a desired differential pressure between a cooling oil of an electric motor and a process gas working fluid of a compressor connected axially to the electric motor. The cooling oil acts as a coolant for the motor compartment of the electric motor and the gas working fluid acts as a coolant for the rotor compartment of the electric motor. At least one bellow is configured to provide two sealed compartments in a pressure equalizer and a spring means is configured to add a differential pressure to the cooling oil, assuring no leaks between the two fluids flows from the cooling oil to the process gas working fluid and no contact of the process gas working fluid with the electric motor stator, in particular electric motor laminations and electric motor windings.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: July 14, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Massimiliano Mariotti, Claudia Cagnarini, Francesco Del Medico
  • Patent number: 10705507
    Abstract: Method for generating a machining program of a plunge mulling machine tool, comprising the steps of: establishing a machining to be performed on a workpiece; acquiring first machining information that indicates stable cut conditions of the machine tool for the workpiece; acquiring second machining information that indicates engagement cut conditions of the machine tool during the machining on the workpiece; carrying out a determination of the rotation speeds of the machine tool during the machining on the basis of the second machining information and the first machining information; wherein the machining program is generated on the basis of the determination carried out.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: July 7, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Massimo Veracini, Massimo Guerrini, Francescosaverio Chiari
  • Patent number: 10697421
    Abstract: An integrated turbomachine is described, comprising: a casing; an electric motor and a driven turbomachine component housed in the casing; a rotating shaft drivingly connecting the electric motor and the driven turbomachine component; a thrust bearing and a radial bearing rotatingly supporting the shaft; an axial locking device housed inside the casing, for applying a thrust to the shaft, parallel to the rotation axis (A-A) of the shaft, and comprised of an actuator member, configured to selectively activate and/or deactivate the axial locking device.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 30, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Luciano Mei, Massimo Camatti, Manuele Bigi
  • Patent number: 10697469
    Abstract: A casing for a subsea compressor comprises a main body having a central axis; a plurality of interconnection flanges attached to the main body; wherein the main body comprises an inner layer made of corrosion resistant material; an outer layer applied over the inner layer and made of a composite material; wherein the outer layer extends along the entire length of said main body.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: June 30, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Manuele Bigi, Simone Marchetti, Luciano Mei, Odd Marius Rosvold, Marco M A Anselmi
  • Patent number: 10697465
    Abstract: A method for manufacturing impellers is described. The method provides for manufacturing a plurality of tubular components, each tubular component forming an inner passage, which is shaped as one of the flow passages of the final impeller. The tubular components are assembled together forming a semi-finished impeller. The semi-finished impeller is provided with annular cavities extending around the rotation axis of the impeller and gaps between adjacent tubular components. The gaps and cavities are filled with metal powder and the semi-finished impeller is subject to hot isostatic pressing, to densify the metal powder and form a monolithic final impeller.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: June 30, 2020
    Assignee: Nuovo Pignone SRL
    Inventors: Paolo Mola, Gabriele Masi, Mihirkumar Pravinbhai Patel, Leonardo Tognarelli, Federico Iozzelli
  • Patent number: 10697545
    Abstract: A method of manufacturing a packing cup for a hyper-compressor is described. The method comprises the following steps: providing an inner disc (25), having opposed first front face (25X) and second front face (25Y), a central axial hole (18) and at least one lubrication-oil duct (23); autofrettaging the lubrication-oil duct (23); after autofrettaging, removing a thickness (D) of the inner disc on both faces thereof.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: June 30, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Carmelo Maggi, Tognarelli Leonardo, Alessio Capanni, Jan Wojnar
  • Patent number: 10683803
    Abstract: A compressed-air energy-storage system, comprising: a variable-nozzle expander configured to receive an airflow at a first pressure and partially expand said airflow at a second pressure, said second pressure being lower than said first pressure, expansion of said airflow in said variable-nozzle expander producing useful mechanical power; a heat generator component configured to receive a fuel and a partially expanded airflow from the variable-nozzle expander; and a turbine configured to receive combustion gas from the heat generator component and expand the combustion gas producing useful mechanical power.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: June 16, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Matteo Berti, Michele D'Ercole, Stefano Francini, Allesandro Russo, Paola Del Turco
  • Patent number: 10675579
    Abstract: A method for predicting the residual useful life of an air filter arrangement is described. The method includes the following steps: providing a plurality of predetermined reference degradation curves; measuring a degradation parameter of the filter arrangement; and estimating the residual useful life of the filter arrangement by comparing the predetermined reference degradation curves and an actual degradation curve defined by measured values of the degradation parameter.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: June 9, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Carmine Allegorico, Claudio Antonini, Marco Santini, Giorgio Marchetti
  • Patent number: 10677255
    Abstract: The shaft seal arrangement for a rotating turbomachine shaft having a rotation axis, comprises a rotor part and a stationary part. A dry gas seal is further provided, in combination with a cooling fluid volume arranged for receiving a cooling fluid and in heat exchange relationship with the dry gas seal. A venting arrangement collectively vents exhaust cooling fluid and dry sealing gas from the shaft seal arrangement.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: June 9, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Leonardo Baldassarre, Andrea Cianti, Simone Amidei, Alberto Armenzani, Emanuele Rizzo
  • Patent number: 10677392
    Abstract: A system for depressurizing a gas in a pipeline is described. The system com-prises an expander configured and arranged for generating mechanical power by expanding gas from a first pressure to a second pressure. The system further comprises a heat pump and a heat transfer circuit containing a heat transfer fluid circu-lating therein, for receiving heat from the heat pump and delivering heat to the gas through a heat exchanger. A controller is further provided, configured and arranged for modulating a flow rate of the heat transfer fluid circulating in the heat transfer circuit as a function of a heat rate to be transferred from the heat transfer fluid to the gas, particularly as a function of temperature differentials between the gas and the heat transfer fluid at a gas inlet side and a gas outlet side of the heat exchang-er.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: June 9, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Francesca Monti, Simone Amidei
  • Patent number: 10669885
    Abstract: Washing of the gas turbine engine, during operation of the gas turbine engine, comprises a washing phase that consists in spraying a detergent liquid substance towards the inlet of the compressor of the engine; the mass flow of the detergent liquid substance to be sprayed is set so that the liquid-to-gas ratio at the inlet of the compressor is more than 1% and less than 5% with reference to the rated mass flow of the compressor; the washing phase comprises a first sub-phase during which the flow of the detergent liquid substance is increased gradually and a second sub-phase during which the flow of the detergent liquid substance is maintained constant.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: June 2, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Mario Pecchiol, Celia Navarro Canales, Tommaso Olivieri, Jorge Omar Manon Cantu
  • Patent number: 10669884
    Abstract: Nozzle used for spraying a liquid substance towards a compressor of a gas turbine engine, comprising an elongated body having an end for ejecting the liquid substance, a conduit for the liquid substance internal to the elongated body and extending up to the end, a recess located at the end, wherein the conduit ends in the recess; wherein the recess opens towards the lateral surface of the elongated body, typically a cylindrical body, and the conduit is tangential to the bottom of the recess.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: June 2, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventors: Mario Pecchioli, Celia Navarro-Canales, Jorge Omar Manon-Cantu, Tommaso Olivieri