1) we taken reading but fault kindly information required on data sheet. (hydrualic pump bearing oil lubrication type)2) bearing shock pulse calculation required kindly hello dbm/dbc.
Shock pulse measures ultra high frequency responses to an input, typically in a range above 30KHz. This is usually representing a very early stage bearing defect. Its presence in a single point is not trendable. However, the bearing fault frequencies and their harmonics will provide verification of either the presence or non-presence of a bearing defect. These can be obtained from the bearing manufacturer if you know the manufacturer and bearing number. Overlay the fault frequencies (BPFO, BPFI, BSF, and FTF) over the data in the FFT to see if the data displayed is a bearing. Follow the data and not opinion.
The vibration frequency associated with the components of a rolling element bearing are based on a calculation which includes variables like rolling element diameter, number of rolling elements, the cosign of the contact angle between the rolling element and the bearing race, etc.. This can be calculated in Hz, cpm, orders, etc.Each bearing fault frequency is calculated from a specific formula, where only the bearing dimension and physical characteristics (which can all be known) are the variables.Bearing manufacturers have published these frequencies and they are many times preloaded into vibration analyzer firmware and associated software..If the shaft speed is known, the exact bearing frequency can be overlaid onto the FFT. When the outer race defect frequency, for instance, is over laid (BPFO), and it aligns with peaks in the FFT, then there is an outer race defect. If none of the bearing frequencies align, then the fault is not a bearing and further diagnostics are required.Calculatable frequencies can display defects in the outer race, inner race, fundamental train (cage), and rolling elements.
Shock pulse reading with acceleration reading uploaded
What is the bearing manufacturer's name? What is the bearing number?
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