Generator rotor unbalance magnetic tension testing bench supported by sliding bearings

Abstract

The invention discloses a generator rotor unbalance magnetic tension testing bench supported by sliding bearings, which includes a variable magnetic pole logarithmic generator rotor main shaft system and a testing bench basic framework. The rotor main shaft system includes a generator rotor, a front sliding bearing support subsystem, a sensor bracket, a stator front end cover, a generator rotor core and a magnet exciting coil, a generator stator, a collecting ring, a carbon brush bracket, a carbon brush, a stator rear end cover, and a rear sliding bearing support subsystem. The generator rotor core and the colleting ring are both mounted on the generator rotor, front and rear ends of the generator rotor are supported by the front and the rear sliding bearing support subsystems, and the generator stator is mounted outside the generator rotor. The testing bench basic framework includes an electromotor, a low-speed coupler, a speed-changing gear box and a high-speed coupler, wherein the electromotor is connected with a low-speed shaft of the speed-changing gear box through the low-speed coupler, and a high-speed shaft of the speed-changing gear box is connected with the generator rotor through the high-speed coupler.

Description

technical field [0001] The invention relates to an unbalanced magnetic tension test bench for a generator rotor supported by a sliding bearing. Background technique [0002] Electricity occupies a major position in my country's energy consumption structure. Hydropower and thermal power generation are currently the most important sources of electricity, and thermal power generation is still the most important and stable source of electricity in my country. The hydroelectric generator set is driven by a water turbine with a low speed, so a multi-pole logarithmic rigid rotor structure is used to obtain electric energy at the mains frequency. The rotor is thick and short, and the rated operating speed is far below its first-order critical speed; The unit is usually driven by a coal-fired steam turbine or gas turbine, with high operating speed and heavy load. Therefore, large-scale thermal power stations generally use unipolar pair alternators, and are supported by sliding bearin...

AI Technical Summary

Problems solved by technology

[0003] When the generator is running at high speed, due to the eccentricity between the rotor and the stator, an uneven air gap magnetic field is formed, which will generate an unbalanced electromagnetic force with radial and tangential components, which will aggravate the vibration of the system, reduce the power generation efficiency, and affect the unit's performance. Safe operation and economics of power station operation, the impact is more significant for large and flexible generator sets

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