Patents by Inventor Kazuhisa Tsutsumi
Kazuhisa Tsutsumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8710693Abstract: It is intended to provide a power generating apparatus of renewable energy type in which a braking mechanism is attached to a rotor arranged upstream of a hydraulic transmission while saving space, and a method of attaching and detaching a blade for the apparatus. The power generating apparatus of renewable energy type is provided with: a rotor having a hub and a main shaft, the hub having at least one blade mounted thereon, the main shaft being coupled to the hub; a generator which generates power by torque inputted from the rotor; and a hydraulic transmission which transmits the torque from the rotor to the generator. A brake disc is fixed to the rotor by tightening together with the hub and the main shaft. A brake caliper is provided to force a brake pad against the brake disc to apply a braking force to the rotor.Type: GrantFiled: January 25, 2012Date of Patent: April 29, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yoshiyuki Amano, Kazuhisa Tsutsumi, Taku Ichiryuu, Takuro Kameda
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Publication number: 20140070534Abstract: A power generating apparatus of renewable energy type includes a rotating shaft rotated by the renewable energy received via a blade, a hydraulic pump driven by the rotating shaft to generate pressurized oil, hydraulic motors driven by the pressurized oil, and synchronous generators connected to a grid without an intervening frequency-conversion circuit and respectively coupled to the hydraulic motors. The displacements of the hydraulic motors are adjusted independently by a motor control unit. A synchronizer supplies a command value of the displacement of each hydraulic motor to the motor control unit so that before the synchronous generators are connected to the grid, a frequency and a phase of a terminal voltage of each synchronous generator are synchronized with the grid.Type: ApplicationFiled: February 24, 2012Publication date: March 13, 2014Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Fumio Hamano, Shigeru Hokazono, Ken Nakayama, Kazuhisa Tsutsumi, Francesco Baldini, Nialll Caldwell, Daniil umnov, Daniel Abrahams, Stephen Laird
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Patent number: 8624413Abstract: Described is a power generating apparatus and a rotor locking method for the apparatus, which is capable of locking the rotor without using a huge braking mechanism. The power generating apparatus of renewable energy type includes a blade, a rotor including a hub and a main shaft, a hydraulic pump of variable displacement type driven by rotation of the rotor, a hydraulic motor driven by operating oil pressurized by the hydraulic pump, and a generator coupled to the hydraulic motor. The rotor locking method for the power generating apparatus may include the steps of: decelerating the rotor by adjusting a pitch angle of the blade: after the decelerating step, stopping the rotor by applying a braking force by the hydraulic pump to the rotor; and locking the rotor so that the rotor is immovable in a rotation direction.Type: GrantFiled: February 15, 2012Date of Patent: January 7, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventor: Kazuhisa Tsutsumi
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Patent number: 8622719Abstract: A hydraulic pump unit includes a cylindrical member that is fit into an outer circumference of the main shaft and a hydraulic pump body arranged on an outer circumferential side of the cylindrical member. The hydraulic pump body includes a ring cam mounted on the outer circumference of the cylindrical member, a pump bearing, a pump housing, a plurality of pistons housed in the pump housing and actuated by the ring cam, and a plurality of cylinders which guide the plurality of pistons in a radial direction and are arranged in a circumferential direction. The hydraulic pump unit is configured such that the pump unit is insertably fixed to the main shaft by the cylindrical member.Type: GrantFiled: November 30, 2010Date of Patent: January 7, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Noguchi Toshihide, Yasuhiro Korematsu, Masayuki Shimizu, Alasdair Robertson, Uwe Stein, Hauke Karstens
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Publication number: 20130307493Abstract: It is intended to provide a power generating apparatus of renewable energy type which obtains desired torque rapidly in response to changes of the renewable energy as well as a method of operation such an apparatus.Type: ApplicationFiled: May 30, 2011Publication date: November 21, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidekazu Ichinose, Kazuhisa Tsutsumi, Masayuki Shimizu, Niall Caldwell, Daniil Dumnov, William Rampen, Stephen Laird, Venkata Pappala
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Publication number: 20130249214Abstract: In view of the problems above, it is an object of the present invention is to provide a power generating apparatus of renewable energy type which can achieve a desired output of the hydraulic motor and a stable power generation regardless of changes of the renewable energy as well as a method of operation such an apparatus.Type: ApplicationFiled: May 30, 2011Publication date: September 26, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidekazu Ichinose, Kazuhisa Tsutsumi, Masayuki Shimizu, Niall Caldwell, Daniil Dumnov, William Rampen, Stephen Laird, Venkata Pappala
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Publication number: 20130234433Abstract: An object of the present invention is to provide a wind turbine generator system and an operation control method thereof, which has a superior operation efficiency and stability at a low wind speed and during the occurrence of a gust and is equipped with Ride Through function at Grid low voltage condition. The wind turbine generator comprises a hydraulic pump of a variable displacement type which is rotated by the main shaft, a hydraulic motor of a variable displacement type which is connected to the generator, and a high pressure oil line and a low pressure oil line which are arranged between the hydraulic pump and the hydraulic motor. An accumulator is connected to the high pressure oil line via an accumulator valve. ACC valve control unit controls opening and closing of the accumulator valve based on at least one of wind speed and the state of the grid.Type: ApplicationFiled: November 30, 2010Publication date: September 12, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhisa Tsutsumi, Masayuki Shimizu, Niall Caldwell, Daniil Dumnov, William Rampen, Venkata Pappala
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Patent number: 8497596Abstract: It is intended to provide a power generating apparatus of renewable energy type which can transmit large torque and has a low-cost and readily processable structure of fixing a hydraulic pump to the main shaft and a method of mounting the hydraulic pump. A plurality of key slots 25 are formed at an end on the back-end side of the main shaft 4. A plurality of keys 30A, 30B are inserted in the key slots 25. The keys 30A, 30B include a reference key 30A to be inserted in one of the key slots and a split key 30B to be inserted in the other of the key slots. The split key 30B is separated into a first key piece 34 having a projection to be inserted in a first groove formed in the main shaft and a second key piece 36 having a depression to be inserted in a second groove formed in the cylindrical member. The pair of key pieces 34, 36 are arranged so that the projection and the depression engage with each other.Type: GrantFiled: June 2, 2011Date of Patent: July 30, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Taku Ichiryuu
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Patent number: 8450868Abstract: An object of the invention is to provide a wind turbine generator or a tidal current generator which is equipped with a hydraulic transmission and achieves a superior power generation efficiency, and a operation method thereof. The wind turbine generator 1 comprises a hydraulic pump 12 of a variable displacement type which is rotated by the main shaft 8, a hydraulic motor 14 of a variable displacement type which is connected to the generator 20, and a high pressure oil line 16 and a low pressure oil line 18 which are arranged between the hydraulic pump 12 and the hydraulic motor 14. The pump controller 32 obtains a target torque of the hydraulic pump 12 at which a power coefficient becomes maximum, and then sets a displacement Dp of the hydraulic pump 12 based on the target torque and the pressure in the high pressure oil line 16.Type: GrantFiled: November 30, 2010Date of Patent: May 28, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Masayuki Shimizu, Niall Caldwell, Daniil Dumnov, Stephen Laird, Venkata Pappala
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Publication number: 20130076042Abstract: It is intended to provide a power generating apparatus of renewable energy type in which a braking mechanism is attached to a rotor arranged upstream of a hydraulic transmission while saving space, and a method of attaching and detaching a blade for the apparatus. The power generating apparatus of renewable energy type is provided with: a rotor having a hub and a main shaft, the hub having at least one blade mounted thereon, the main shaft being coupled to the hub; a generator which generates power by torque inputted from the rotor; and a hydraulic transmission which transmits the torque from the rotor to the generator. A brake disc is fixed to the rotor by tightening together with the hub and the main shaft. A brake caliper is provided to force a brake pad against the brake disc to apply a braking force to the rotor.Type: ApplicationFiled: January 25, 2012Publication date: March 28, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoshiyuki AMANO, Kazuhisa TSUTSUMI, Taku ICHIRYUU, Takuro KAMEDA
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Publication number: 20130076040Abstract: Described is a power generating apparatus and a rotor locking method for the apparatus, which is capable of locking the rotor without using a huge braking mechanism. The power generating apparatus of renewable energy type includes a blade, a rotor including a hub and a main shaft, a hydraulic pump of variable displacement type driven by rotation of the rotor, a hydraulic motor driven by operating oil pressurized by the hydraulic pump, and a generator coupled to the hydraulic motor. The rotor locking method for the power generating apparatus may include the steps of: decelerating the rotor by adjusting a pitch angle of the blade: after the decelerating step, stopping the rotor by applying a braking force by the hydraulic pump to the rotor; and locking the rotor so that the rotor is immovable in a rotation direction.Type: ApplicationFiled: February 15, 2012Publication date: March 28, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventor: Kazuhisa TSUTSUMI
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Patent number: 8403644Abstract: A power generating apparatus of renewable energy type in which a hydraulic pipe between a hydraulic pump installed inside a nacelle and a hydraulic motor installed near a bottom part of a tower can handle the turning motion of the nacelle. In the power generating apparatus of renewable energy type, a hydraulic pump inside the nacelle and a hydraulic motor near a base end part of a tower are connected by a first double pipe and a second double pipe. The first double pipe is rotatably connected to the second double pipe. The first double pipe includes a first inner pipe and a first outer pipe. The second double pipe includes a second inner pipe and a second outer pipe. The first and second inner pipes communicate with each other to form an inner passage. The first and second outer pipes communicate with each other to form an outer passage.Type: GrantFiled: June 16, 2011Date of Patent: March 26, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Takuro Kameda, Taku Ichiryuu
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Publication number: 20130067900Abstract: A power generating apparatus includes a rotating shaft, a hydraulic pump driven by the rotating shaft, a hydraulic motor driven by pressurized oil supplied from the hydraulic pump, and a generator coupled to the hydraulic motor. Each of the hydraulic pump and motor includes working chambers each defined by a cylinder and a piston, a high pressure manifold and a low pressure manifold. Each of the high and low pressure manifolds includes branch channels connected to the working chambers and a merging channel connected to a high or low pressure oil line. The branch channels are equipped with high or low pressures valves, joined together and merged into the merging channel.Type: ApplicationFiled: May 30, 2011Publication date: March 21, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhisa Tsutsumi, Masayuki Shimizu, Atsushi Maekawa, Toshihide Noguchi, Yasuhiro Korematsu, Niall Caldwell, Daniil Dumnov, Stephen Salter, Uwe Stein, William Rampen, Robert Fox, Alasdair Robertson, Stephen Laird, Hauke Karstens, Venkata Pappala
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Patent number: 8362633Abstract: A wind turbine generator includes a hydraulic pump rotatable by a main shaft, a hydraulic motor connected to a generator, and a high pressure oil line and a low pressure oil line which are arranged between a hydraulic pump and a hydraulic motor. An operation mode selection unit switches an operation mode between a normal operation mode and a low rotation speed operation mode depending on environment conditions. The low rotation speed operation mode has a rated rotation speed of the main shaft lower than that of the normal operation mode, at least one of a rated displacement of the hydraulic pump and a rated pressure of the high pressure oil line that are greater than that of the normal operation mode and a rated output of a generator substantially same as that of the normal operation mode.Type: GrantFiled: November 30, 2010Date of Patent: January 29, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Masayuki Shimizu, Daniil Dumnov
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Patent number: 8358024Abstract: An object of the present invention is to provide a wind turbine generator and a tidal current generator equipped with a hydraulic transmission with a combination of a hydraulic pump and a hydraulic motor and which has a superior productivity and maintainability. The wind turbine generator 1 has the hydraulic transmission 10 for transmitting the rotation energy of a main shaft 8 to a generator 20. The hydraulic transmission 10 includes a hydraulic pump 12 of variable displacement type which is driven by the main shaft 8, a hydraulic motor 14 of variable displacement type which is connected to the generator 20, and a high pressure oil line and a low pressure oil line which are arranged between the hydraulic pump 12 and the hydraulic motor 14. The hydraulic transmission 10 is at least partially constituted of a plurality of modules (M1 to M7).Type: GrantFiled: November 30, 2010Date of Patent: January 22, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Atsushi Maekawa, Masayuki Shimizu, Stephen Salter, Uwe Stein, William Rampen, Robert Fox, Hauke Karstens
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Publication number: 20120257994Abstract: It is intended to provide a power generating apparatus of renewable energy type which can transmit large torque and has a low-cost and readily processable structure of fixing a hydraulic pump to the main shaft and a method of mounting the hydraulic pump. A plurality of key slots 25 are formed at an end on the back-end side of the main shaft 4. A plurality of keys 30A, 30B are inserted in the key slots 25. The keys 30A, 30B include a reference key 30A to be inserted in one of the key slots and a split key 30B to be inserted in the other of the key slots. The split key 30B is separated into a first key piece 34 having a projection to be inserted in a first groove formed in the main shaft and a second key piece 36 having a depression to be inserted in a second groove formed in the cylindrical member. The pair of key pieces 34, 36 are arranged so that the projection and the depression engage with each other.Type: ApplicationFiled: June 2, 2011Publication date: October 11, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhisa TSUTSUMI, Taku ICHIRYUU
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Patent number: 8277167Abstract: An apparatus and a method for operating a wind turbine capable of preventing the occurrence of damage of the blades by evading excessive irregular loads from acting on the blades in the slanting direction in the event of power failure when strong wind blows, are provided.Type: GrantFiled: November 9, 2007Date of Patent: October 2, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masaaki Shibata, Toyoaki Furukawa, Yoshiyuki Hayashi, Yuuji Yatomi, Kazuhisa Tsutsumi
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Patent number: 8181455Abstract: It is intended to provide a power generating apparatus of renewable energy type that has a fixation structure of the hydraulic pump that can transmit large torque and can be processed with ease and at low cost even when the main shaft has a large diameter, as well as a method of installing such hydraulic pump. In the power generating apparatus, a connecting member 20 is provided on the outer periphery of a main shaft 4 to engage with a cylindrical member 10 provided on the outer periphery of the main shaft 4. The connecting member 20 includes a fixing part 21, a first spline part 22 and first pins 23. The fixing part 21 is fixed to the outer periphery of the main shaft 4 by means of the first pins 23 disposed along a circumferential direction of the main shaft 4.Type: GrantFiled: July 5, 2011Date of Patent: May 22, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuhisa Tsutsumi, Taku Ichiryuu
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Publication number: 20120104752Abstract: An object of the invention is to provide a wind turbine generator or a tidal current generator which is equipped with a hydraulic transmission and achieves a superior power generation efficiency, and a operation method thereof. The wind turbine generator 1 comprises a hydraulic pump 12 of a variable displacement type which is rotated by the main shaft 8, a hydraulic motor 14 of a variable displacement type which is connected to the generator 20, and a high pressure oil line 16 and a low pressure oil line 18 which are arranged between the hydraulic pump 12 and the hydraulic motor 14. The pump controller 32 obtains a target torque of the hydraulic pump 12 at which a power coefficient becomes maximum, and then sets a displacement Dp of the hydraulic pump 12 based on the target torque and the pressure in the high pressure oil line 16.Type: ApplicationFiled: November 30, 2010Publication date: May 3, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhisa Tsutsumi, Masayuki Shimizu, Niall Caldwell, Daniil Dumnov, Stephen Laird, Venkata Pappala
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Publication number: 20120061969Abstract: An object of the present invention is to provide a wind turbine generator and a tidal current generator equipped with a hydraulic transmission with a combination of a hydraulic pump and a hydraulic motor and which has a superior productivity and maintainability. The wind turbine generator 1 has the hydraulic transmission 10 for transmitting the rotation energy of a main shaft 8 to a generator 20. The hydraulic transmission 10 includes a hydraulic pump 12 of variable displacement type which is driven by the main shaft 8, a hydraulic motor 14 of variable displacement type which is connected to the generator 20, and a high pressure oil line and a low pressure oil line which are arranged between the hydraulic pump 12 and the hydraulic motor 14. The hydraulic transmission 10 is at least partially constituted of a plurality of modules (M1 to M7).Type: ApplicationFiled: November 30, 2010Publication date: March 15, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhisa Tsutsumi, Atsushi Maekawa, Masayuki Shimizu, Stephen Salter, Uwe Stein, William Rampen, Robert Fox, Hauke Karstens