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High acceleration of the gearbox casing

I would like to ask you for a recommendation regarding the existing problem of high acceleration of the gearbox casing. The gearbox is single-stage with cylindrical helical gears. It is installed between LP and HP centrifugal air compressors. Available gear unit data: rated power: 6491 kW bull gear speed range: 5280 rpm – 6480 rpm pinion speed range: 9000 rpm – 11040 rpm number of teeth on the bull gear: 99 number of teeth on the pinion: 58 The gearbox accelerations are measured with two...Read More...
Last Reply By Riro · First Unread Post
Motor Speed: 2950 RPM Fan Speed: 3862 RPM In your opinion, What is the cause of this vibration oscillation?Maximum Vibration oscillation is at point 3V(DE FAN.Vertical) in the attachment, you can see the: Slow Motion of Belt moving, FFT and Part of Time Signal, Long Time Signal, Sound of Vibration thanks allRead More...
Last Reply By rreeve6 · First Unread Post

2x harmonic reading at 0º and missing at 180º

Hi everyone, I am struggling with a strange problem when measuring a roundness profile of large rotor in a horizontal grinding machine. The rotor is a paper mill where both rotor ends are ground. The rotor is attached between centres (headstock/tailstock). Rotor alignment is supposed to be in tolerance. When I measure the roundness (not exactly the roundness, it is the total radial displacement though) with capacitive non-contact sensors I obtain the displacement waves. The problem arises...Read More...
Last Reply By rreeve6 · First Unread Post