Method and system for optimizing operating swing of vertical shaft suspended hydrogenerator unit

A system for optimizing operating swing of a vertical shaft suspended hydrogenerator unit, characterized by comprising a data acquisition terminal, a processing terminal and an input terminal;

• The acquisition terminal collects turning swing data of the unit before maintenance, or collects the data when turning of the unit is carried out again during maintenance, and the processing terminal calculates a direction of relative displacement between a rotating center of each bearing for the unit and a center line of the main shaft;
• Measure an installation clearance of each bearing bush for a guide bearing during maintenance;
• after inputting through the input terminal, the processing terminal analyzes a change value of the bush clearance of the unit within an operating cycle;
• in case of no change value or if the change value is less than 0.01 mm, structural strength of the bearing is judged to be acceptable, and installation is considered to be firm and reliable;
• Detect temperature of each bearing bush as well as oil level and temperature of the bearing before maintenance, adjust bush clearance according to a design value, start the unit to perform a temperature rise test, and record the operating swing of the unit, the temperature of each bearing bush, the oil level and temperature of the bearing, and input through the input terminal;
• the processing terminal calculates margin between the operating temperature of the bearing bush and the design value, and analyzes whether the bush clearance can be reduced beyond a design range;
• If feasible, a target value of the operating temperature of the bearing bush is set through the input terminal, and the processing terminal reduces the clearance of each bearing bush according to the direction of relative displacement between the rotating center of the bearing and the center line of the main shaft analyzed according to Step (1), and clearance reduction of each bush is automatically calculated by a weighted average method according to a ratio of bush clearance variation to bush temperature difference during maintenance and bush adjustment of all units;
• Carry out a temperature rise test of the unit, input the operating swing of the unit and the temperature of each bearing bush through the input terminal, and correct the clearance of each bearing bush again according to the target value of the operating temperature of the bearing bush at the processing terminal, repeat until the operating temperature of the bearing bush reaches the target value and a temperature deviation of the bearing bush does not exceed 5 degrees C.;
• Carry out a stability qualitative test of the unit, input the operating temperature of the bushing bush and the operating swing of the unit through the input terminal, and the processing terminal compares the pre-maintenance data of the unit and constantly optimizes, so that an optimized value of the operating swing can reach an expected value and the operating temperature of the bearing bush can reach the target value.