Vertical current-carrying friction and wear test bench for hydraulic turbine brushes and collector rings

Abstract

The invention discloses a vertical current-carrying friction and wear test bench for testing the wear of brushes and collector rings of hydraulic turbines, including a drive system, a bracket system, an adjustment system and a loading system. The output end of the high-speed motor is connected to one end of the upper main shaft through a torque meter, and a guide bearing is set on the upper main shaft, and the other end of the upper main shaft is connected to the upper side of the connecting plate, and the lower side of the connecting plate is connected to the lower main shaft. Collector rings and thrust bearings are provided with electric brushes and auxiliary carbon brushes on the collector rings; by adopting a vertical structure, the present invention can greatly simulate the swing situation of the actual machine in the test, and the obtained data is closer to reality It has important reference value for improving the design of the brush and predicting the service life of the friction pair.

Description

technical field [0001] The invention relates to the field of fluid mechanical equipment, in particular to a vertical current-carrying friction and wear test bench for testing the wear of brushes and collector rings of water turbine units. Background technique [0002] Brushes and collector rings are important components for introducing the generator excitation current into the rotor excitation winding in a hydroelectric generator set. When the water turbine unit is running, the brushes and the collector rings are in contact with each other and rub against each other, which realizes friction and wear while realizing current transmission. [0003] At present, the brush-collector ring friction pairs of all large and small water turbines, including the Gezhouba Hydropower Station, are severely worn. Some brushes need to be replaced every 2-3 months, and the collector rings even need to be returned to the original factory for repair during the overhaul period. Round grinding not...

AI Technical Summary

Problems solved by technology

However, most of the existing current-carrying friction and wear test programs report on grid power supply and third-party rails, and there are almost no reports on the current-carrying friction and wear phenomenon in hydro turbine units, and the existing horizontal rolling current-carrying friction and wear testing machine It is impossible to simulate the centrifugal swing phenomenon of the collector ring under the vertical structure working condition

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