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    Manufacturer: Zedex

    Cable Glan for hydroelectric power plant pump

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    SKU: JG_1664

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    Slide bush in hydroelectric power plant pump
    Material
    ZX-100K replaces bronze.
    Description of the application
    Slide bush for a 12m long main spindle in a centrifugal pump of a hydroelectric power plant. The flange bracket unit housing has got a outer diameter of 240mm, shaft diameter 140mm with tolerance h6. The clearance should be very tight (approximately 0,15mm for big shafts and high speeds). The length of the bushing is 240mm.
    Load
    The pump has a drive power of 315kW. The shaft speed is 500rpm, corresponding to a sliding speed of 220 m/min.
    Problem
    Usually water flows through the bearing seat. The pump operates continuously 24 hours per day, approx. 350 days a year. When starting and stopping there is no hydrodynamic lubricating film (process water lubrication), and this operation takes place in a mixed friction area which leads to require an extremely high wear resistance.
    The bearing seat caused for a loss greasy lubrication of 1 ton per year. For environmental reasons, several polymeric materials were tested. So far the best tested material achieved a service life of 7.000 operating hours with 4mm wear. A longer working life of approximately 50.000 hours was required.


    Slide bush in hydroelectric power plant pump
    Material
    ZX-100K replaces bronze.
    Description of the application
    Slide bush for a 12m long main spindle in a centrifugal pump of a hydroelectric power plant. The flange bracket unit housing has got a outer diameter of 240mm, shaft diameter 140mm with tolerance h6. The clearance should be very tight (approximately 0,15mm for big shafts and high speeds). The length of the bushing is 240mm.
    Load
    The pump has a drive power of 315kW. The shaft speed is 500rpm, corresponding to a sliding speed of 220 m/min.
    Problem
    Usually water flows through the bearing seat. The pump operates continuously 24 hours per day, approx. 350 days a year. When starting and stopping there is no hydrodynamic lubricating film (process water lubrication), and this operation takes place in a mixed friction area which leads to require an extremely high wear resistance.
    The bearing seat caused for a loss greasy lubrication of 1 ton per year. For environmental reasons, several polymeric materials were tested. So far the best tested material achieved a service life of 7.000 operating hours with 4mm wear. A longer working life of approximately 50.000 hours was required.


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