Starting method for rotating machine and starting method for wind turbine generator
AssigneeMitsubishi Heavy Industries, Ltd.
InventorKazufumi Takayanagi
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Abstract
A starting method is provided for a rotating machine which includes a main shaft, a main bearing rotatably supporting the main shaft and a main bearing lubricant pump circulating lubricant through the main bearing. The starting method includes steps of: rotating the main shaft to raise a temperature of the main bearing in a state in which the main bearing lubricant pump is not operated; and operating the main bearing lubricant pump to start supplying the lubricant to the main bearing after the step of raising the temperature of the main bearing.
Claims11
A starting method of a wind turbine generator which includes a main shaft connected to a wind turbine rotor, a main bearing rotatably supporting said main shaft and a main bearing lubricant pump circulating lubricant through said main bearing, said method comprising:
- rotating said main shaft and raising a temperature of said main bearing in a state in which said main bearing lubricant pump is not operated, wherein a rotational velocity of said main shaft is controlled in a state in which a generator connected to said main shaft is placed into a no-load state in the raising of the temperature of said main bearing;
- and
- operating said main bearing lubricant pump to start supplying the lubricant to said main bearing after the raising of the temperature of said main bearing,
- wherein the no-load state is a state in which a generator torque of the generator is zero and a rotor of the generator remains connected to the main shaft.
A starting method of a wind turbine generator which includes a main shaft connected to a wind turbine rotor, a main bearing rotatably supporting said main shaft and a main bearing lubricant pump circulating lubricant through said main bearing, said method comprising steps of:
- rotating a main shaft and raising a temperature of a main bearing in a state in which lubricant is supplied to the main bearing at a first flow rate with a main bearing lubricant pump, wherein a rotational velocity of said main shaft is controlled in a state in which a generator connected to said main shaft is placed into a no-load state in the raising of the temperature of said main bearing;
- and
- supplying lubricant to said main bearing with said main bearing lubricant pump at a second flow rate higher than said first flow rate,
- wherein the no-load state is a state in which a generator torque of the generator is zero and a rotor of the generator remains connected to the main shaft.
Dependencies are inferred from the claim text.