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Axial VPF in a center hung pump
Started by
Danny Harvey
in
Vibration Analysis - Balancing - Alignment
:
I've got a couple of center hung pumps that have shown increases at vane passing frequency in the axial direction on the outboard pump bearings. Here's a velocity and demod...
36
0
183
1779298222
Uninstalling Co-Pilot
Started by
Danny Harvey
in
Utility Software & Apps
:
Co-Pilot seems to be interfering with my work in MS Word so I first turned it off. But it still appeared and when I would copy things it would ask if I wanted suggestions about formatting,...
17
0
109
1779295109
Multi-bearing turbine-generator alignment - cross-machine bearing pair validation
Started by
iantmyers74
in
Vibration Analysis - Balancing - Alignment
Alignment
:
Looking for a sanity check from anyone with experience on 4-bearing turbine-generator train alignment calculations. Machine geometry: T1 at 254", T2 at 28", T3 at 55", T4 at...
20
0
244
1779157816
CSI 2140
Started by
Sledder2
in
CSI
:
Hello all, I'm waiting for the brand new 2140 to arrive to replace the 2130, and I have a few questions. Does it come with a rubber case with handles like the 2130? Is plot data still...
12
0
138
1779017579
Interpretting various pk/pk numbers for prox probes in AMS (and Bently output)
Started by
electricpete
in
Vibration Analysis - Balancing - Alignment
:
I'm staring at the various numbers reported from our AMS software and one of them doesn't make sense. I'm using an example with a glitchy shaft. Slide 1 is the signal from the Bently Rack (It's an...
6
0
99
1778820303
Pruftechnik VibXpert I with Balancing
Started by
ckyjohn
in
For Sale / Wanted to Buy
:
I have a good used VibXpert I, two channel with balancing including laser tach, sensors etc... all in a Pelican case. DM me if interested.
0
0
39
1778713605
Combining CSI databases into one.
Started by
Vibe-Rater
in
CSI
:
Hi All, I've been tasked with combining 5 CSI databases into one. For me I only care about the .rbm files where the data lives. And not concerned about the rbmview.mdb files as I don't use...
5
0
59
1778698852
Anyone Know where I might find a Pruftechnik VIB 6.1 Adapter?
Started by
MarkL
in
For Sale / Wanted to Buy
:
I have a customer runs Pruftechnik 'Vibrex' Online protection system, it uses Pruf's own proprietary sensors but has a signal output per channel on the interface box, Its Current Line drive not...
3
0
66
1778627429
Centrifugal pump performance monitoring
Started by
vogel
in
Vibration Analysis - Balancing - Alignment
:
I'm looking for experiences and ideas to monitor the performance of a centrifugal pump (fluid: water, 800 kW, horizontal, between bearings) driven by an electric motor (AC, constant speed). Do you...
25
0
329
1778603003
Minimalist alignment
Started by
Danny Harvey
in
Vibration Analysis - Balancing - Alignment
:
We are going to have to do a motor/pump alignment in a radiation contaminated area. To do that, everything we take into the area will need to be checked for contamination and will be held until...
14
0
179
1778551482
4 KV MCSA Safety
Started by
George D
in
Vibration Analysis - Balancing - Alignment
:
At issue is a 4 KV, 400 HP, two-pole motor. The utility currently relies solely on vibration monitoring to warn of rotor bar degradation on 4 KV motors… running speed and harmonics with pole-pass...
4
0
88
1778510206
Bearing life
Started by
Danny Harvey
in
Vibration Analysis - Balancing - Alignment
:
In a 50 hp 4-pole AC induction motor with 63XX non-greasable bearings, my client experienced a rapid failure. The only indication he had was 1 x 2 running speed that was found to be a dry grid...
18
0
207
1778411095
Sole Plate Void Repair?
Started by
George D
in
Vibration Analysis - Balancing - Alignment
:
This deals with a 400 HP 2-pole motor that drives a 9-stage centrifugal pump. The pump is intended for safety response only, and is only run infrequently for testing. Vibration data is...
12
0
190
1778255410
2 x lf sidebands around RBPF
Started by
Danny Harvey
in
Vibration Analysis - Balancing - Alignment
:
I just had a discussion with a client who was advised (by a motor shop) that 2 x lf sidebands spaced around likely rotor bar passing frequency was the definitive indicator of broken or cracked rotor...
12
0
115
1778092945
Axial Piston Pumps
Started by
modulating@yourfrequency
in
Vibration Analysis - Balancing - Alignment
:
I'm hoping to hear if anyone in the group has had good success monitoring axial piston pumps. First I'll start with my experience with them: I never repaired or monitored them during my...
2
0
66
1778075199
Marketing?
Started by
Batman
in
Vibration Analysis - Balancing - Alignment
:
Hello, How do you make your activity grow, those who do this for themselves? How do you approach new customers or get requests from customers? Which is the more effective? By word of mouth (from...
2
0
116
1777984550
Motor showing looseness.
Started by
egonalba27
in
Vibration Analysis - Balancing - Alignment
:
Siemens C-Phase motor RPM 1763. DE. BRG: 40BCO2JPP3 ODE. BRG: 40BCOSJPP3 Sumitomo Reducer. Ratio: 35. About 1 year old reducer and oil analysis showing excessive wear. Attached the oil...
12
0
144
1777933442
2xLF - Soft Foot Harmonics?
Started by
Lee_003
in
Vibration Analysis - Balancing - Alignment
:
Hi, I'm analyzing several of the same machine (Motor - Drive Shaft - Gearbox - coupled to a Cooling Fan). I'm seeing a lot of 2xLF on this 1800 RPM motor. Data is being taken on the fins...
5
0
140
1777559158
Why would an analyst need the rotational speed of the cage relative to the inner ring?
Started by
tomcd3
in
Vibration Analysis - Balancing - Alignment
:
Our website produces this frequency for reasons I do not know. Pls elucidate. 📷
11
0
107
1777557018
CAT III Vibration Analyst looking for a remote (or remote-friendly position)
Started by
JMorrisKCK
in
Job Postings / Position Wanted
:
I'm in need of a remote position as a vibration analyst or reliability engineer. I have 10 years of experience in the industry of predictive maintenance. I graduated with a bachelor's degree in...
0
0
62
1777318662
Full time position opening
Started by
Joshua1981
in
Job Postings / Position Wanted
:
Industrial facility Northwest Alabama looking for a reliability professional to join our SME team, this is a full-time permanent position. Relocation package offered, good benefits and upward...
1
0
215
1777317076
RotorBalancePro
Started by
ivibr8
in
TradeShow (Vendor Area)
:
I’d like to introduce an application I’ve been developing called RotorBalancePro , designed specifically for field technicians and engineers performing rotor balancing. This project has been a...
4
0
123
1777126894
Remote vibration analysis full or part time
Started by
lancaster
in
Job Postings / Position Wanted
:
We are looking for a Level 2 VA guy or gal to do some remote analysis on a subcontract (full or part time) basis. This position must be filled by someone resident in the US. The type of assets...
4
0
191
1777093004
Motor humming
Started by
egonalba27
in
Vibration Analysis - Balancing - Alignment
:
I could use a little help trying to diagnose the issue. The motor started humming this yesterday. Tried greasing the bearings and made no difference. Ive uploaded pictures of the name plate. RPM IS...
29
0
211
1776966956
Percentage of error using triaxial accelerometer readings vs individual accels....
Started by
Ron Brook
in
Vibration Analysis - Balancing - Alignment
:
Well, this serves me right. I used to argue that a triaxial wasn't as accurate as individual axis readings because my data collector of choice did not accept a triax input. Now the...
24
0
947
1776475794
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