# 2 times line frequency vibration on vertical pump

### Troubleshooting Vibration Problems. A Compilation of Case . DTIC

When the sound would begin, vertical stripes would also appear on . frequency of the sound, along with the vibration on the induction furnace and the current ... are to be taken in Mils Displacement and that if the base line readings double, . The problem on the High Pressure pump was not at twice the HP pump running.

Live Chat### Motor Vibration Analysis: Keeping it Simple . Electrical Construction .

twice line frequency vibration), gather housing vibration data with magnetically . You should take housing vibration measurements in three planes (vertical,.

get price>>### Vibration Analysis I

time waveform showing overall vibration frequency low freq. high freq. time overall vibration . Lines of Resolution. Individual Vertical Lines or Bins Located Adjacent to One Another . Two pole motors will always display a 2X line frequency peak. . Pumps or fans fluid pulsation frequency(cpm) occurs at. [No. of vanes.

Live Chat### case study: vibration analysis of a vertical pump of . ResearchGate

Jul 31, 2018 . The latest trends tend to maintain fixed time intervals for. replacement of . The task of this type vertical pump 165 (Fig.1,2) is heated. water from the ... frequency (red line no.4) and exist the failure of the. rolling elements. Fig.

Live Chat### An Analytical Approach to Solving Motor Vibration . Automation

Member. Large Motors & Pumps .. On 2 pole motors, the twice line frequency vibration level will ... measurements be made at the motor feet in both the vertical.

Live Chat### Where does the twice line frequency vibration peak come from .

Jan 20, 2014 . See more presentations like this at Have you ever wondered where the twice line frequency peak.

Live Chat### Nuggets of Gold, Vibration Case Histories

vibration problems. Balancing. Alignment. Motors. Pumps .. Case 2 On a large fan, the horizontal and vertical vibration phase angles were identical. .. poles times slip frequency around the line frequency in the current spectrum where.

Live Chat### VIBRATIONAL PROBLEMS OF LARGE VERTICAL PUMPS AND .

these factors, the model showed that up to a frequency of twice the running speed .. Measuring the vibration of a vertical pump and motor can present problems.

Live Chat### Vibration Analysis I

time waveform showing overall vibration frequency low freq. high freq. time overall vibration . Lines of Resolution. Individual Vertical Lines or Bins Located Adjacent to One Another . Two pole motors will always display a 2X line frequency peak. . Pumps or fans fluid pulsation frequency(cpm) occurs at. [No. of vanes.

Live Chat### Vibration Reference Guide Azima DLI

DLIengineering . Basic Vibration Theory. Time vs. Frequency Analysis. Individual . 1. Identify Peaks: Relationship to machine component. 2. Trend Amplitude of Peak: Severity of machine fault. 3. . 120 Hz sidebands (twice line freq.) . Imbalance, Misalignment, Bearings, Fan blades, Pump Impeller, . Radial = Vertical.

Live Chat### Motor Vibration Analysis: Keeping it Simple . Electrical Construction .

twice line frequency vibration), gather housing vibration data with magnetically . You should take housing vibration measurements in three planes (vertical,.

get price>>### Diagnostic Reference Charts IMPACT Engineering

a. seen as whole fractions (1/2, 1/3) on real time . less than unbalance if vibration decreases abruptly out bow . e. problem on a vertical motor tested alone will . due to extra mass of pump and process. . running speed and 2x line frequency.

Live Chat### Tuning out torsional vibration Artec Machine Systems

erating speed range as vertical lines. Upward sloping .. tor pulsations occur at one and two times the electrical frequency. and are repre sented as 1 X a.nd 2X . Other pump shaft excitations are represented as 5, 20, and 25 X lines. The two.

Live Chat### Resonance Analysis a Vertical Pump Case Study

May 26, 2003 . Resonance, pump, vibration, impact test, stiffness, structure . implemented based on vibration analysis were quite inexpensive and brief in time . 2 /4. Table 1 Unfiltered vibration data on 26 May. Motor Top In line (MTI), ips 0 p . frequencies, a high resolution data was collected with 3200 lines, as shown.

Live Chat### Vibration analysis Plant Services

identify frequencies at which vibration was prominent. . means obtaining a full spectrum vibration signature in three axes (horizontal, vertical, . tend to appear at 2 x rpm. . motor that elevated it to line up with the pump literally rang like a bell, . considerable magnitude, or the amplitude increases over time, it usually does.

Live Chat### Phase analysis: Making vibration analysis easier Reliable Plant

2) Cause and Effect Vibration: For every action, there is a reaction. . the stator housing creating a non uniform rotor to stator air gap resulting in vibration at two times line frequency. . Figure 14 is an ODS structure drawing of a vertical pump.

Live Chat### Vibration Diagnostics Chart Efftek Diagnostic Engineers

Vibration frequency equals rotor speed. . Typically high 1 and 2 times axial vibration; Not unusual for 1, 2 or 3X RPM to dominate . shift in the vertical direction between the baseplate components of the machine . Erosion of impeller vanes and pump casings may occur if left unchecked; Sounds . Electrical line frequency.

Live Chat### Pump Vibration Analysis

Nov 28, 2011 . Figure 1. Vibration severity chart with frequency as follows: Left Velocity In/Sec Peak, . Table 2. Overall vibration velocity guide line for various motor pump . Radial. Rotor Rub Truncated Time Wave Form. 1 x rpm. Vertical.

Live Chat### An Analytical Approach to Solving Motor Vibration . Automation

Member. Large Motors & Pumps .. On 2 pole motors, the twice line frequency vibration level will ... measurements be made at the motor feet in both the vertical.

Live Chat### Where does a twice line frequency vibration come from? How is it .

Aug 4, 2016 . In an induction motor, the stator has multiple coils that have AC currents passing through them. Now, in general, for a three phase supply these.

Live Chat### Pump Vibration Analysis

Nov 28, 2011 . Figure 1. Vibration severity chart with frequency as follows: Left Velocity In/Sec Peak, . Table 2. Overall vibration velocity guide line for various motor pump . Radial. Rotor Rub Truncated Time Wave Form. 1 x rpm. Vertical.

Live Chat### Where does a twice line frequency vibration come from? How is it .

Aug 4, 2016 . In an induction motor, the stator has multiple coils that have AC currents passing through them. Now, in general, for a three phase supply these.

Live Chat### Nuggets of Gold, Vibration Case Histories

vibration problems. Balancing. Alignment. Motors. Pumps .. Case 2 On a large fan, the horizontal and vertical vibration phase angles were identical. .. poles times slip frequency around the line frequency in the current spectrum where.

Live Chat### Where does the twice line frequency vibration peak come from .

Jan 20, 2014 . See more presentations like this at Have you ever wondered where the twice line frequency peak.

Live Chat### Pump Vibration Analysis MISTRAS Group

Nov 28, 2011 . Figure 1. Vibration severity chart with frequency as follows: Left Velocity In/Sec Peak, . Table 2. Overall vibration velocity guide line for various motor pump . Radial. Rotor Rub Truncated Time Wave Form. 1 x rpm. Vertical.

Live Chat### Pump Vibration Analysis MISTRAS Group

### Spectrum Analysis SKF

and track vibration occurring at specific frequencies. . If the machine is connected to a fan or pump, it is important to know the number of fan blades or impellers. . this peak and check for peaks at two times, three times, four times, etc. . How was the sensor positioned: horizontal, vertical, axial, in the load zone, etc.? Sensor.

Live Chat### VIBRATIONAL PROBLEMS OF LARGE VERTICAL PUMPS AND .

these factors, the model showed that up to a frequency of twice the running speed .. Measuring the vibration of a vertical pump and motor can present problems.

Live Chat### Mechanical Vibration Problems With Variable Frequency Drives

operation, however, can cause vibration problems in the pump . 2. Control Flexibility. The ability of the VFD to vary the speed of a pump gives the .. the grid, at which time the second unit could be started with the. VFD. .. pump O'd horizontal.

Live Chat### Vibration Diagnostics Chart Efftek Diagnostic Engineers

Vibration frequency equals rotor speed. . Typically high 1 and 2 times axial vibration; Not unusual for 1, 2 or 3X RPM to dominate . shift in the vertical direction between the baseplate components of the machine . Erosion of impeller vanes and pump casings may occur if left unchecked; Sounds . Electrical line frequency.

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