After determining the moment of inertia required for the entire generator, the moment of inertia of the diesel generator flywheel can be determined. When determining the moment of inertia of a diesel generator flywheel, consider the following factors:
(1) For diesel generator sets, in most cases, it is a diesel generator direct drive generator; and the moment of inertia of the generator rotor is usually proportional to the power of the generator. Therefore, when considering the moment of inertia of the flywheel, according to the power of the diesel engine and the power of the complete set of units, in the whole machine inertia of the unit, it is necessary to consider and leave the connection between the generator rotor and the diesel generator and the generator after the flywheel. Moment of inertia. After deducting the moment of inertia other than the diesel flywheel, the rest of it is supplemented by the diesel flywheel.
(2) For series diesel generators, the design of flywheel inertia, in addition to considering the needs of the whole machine, should also consider reducing the specifications of the flywheel as much as possible to facilitate production management. It can be seen from the above calculation that the calculation of the moment of inertia of the whole machine by the formula is the minimum moment of inertia required to achieve a certain degree of non-uniformity of rotation. In engineering design, the inertia of the whole machine should be achieved and slightly larger than the calculated value. In this way, it is possible to reduce the configuration of the flywheel, that is, a model in which the inertia of the whole machine is not significantly different, and a flywheel can be used. Take the L+V20/27 series diesel engine as an example: the model has two calibration speeds of 1000r/min and 900r/min, a total of 18 models, and only five kinds of flywheels are equipped.
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Label: Design of diesel generator flywheel inertia
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