Tagged With "Engineer"

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Alphabox - Diagnostic system for engines

Istec International ·
I would like to know your opinion about a product that Jaquet will release soon. It's called the Alphaboxl; a predictive diagnostic system for combustion engines. I've read something about this product in a newsletter on http://www.jaquet.com/alphabox/. Since the newsletter mostly covers the advantages of the product, i would also like to know if it might have any disadvantages. Thanks!
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CMMS as viewed by Reliability Engineers

planschd2 ·
I wish reliability professionals would recognize that we too are important . There are many experts in the field of condition monitoring, defect elimination, root cause analysis, RCM analysis, etc. and they believe strongly in their approach. The CMMS is a valuable database containing asset registers, asset failure history, asset criticality, spare part data, warranty information, asset age/installation-date/replacement cost, asset classification data, job plan libraries, PM/PdM...
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Diesel Fire Pump

oju ·
Does anyone have specifications for Vibration levels on diesel fire pumps? Also for those who do reciprocating engines what are the levels you should expect to see 2xRPM at under general load conditions?
Event

CSHE

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Re: Alphabox - Diagnostic system for engines

Becar ·
I must say I am sceptic about those kind of systems. There was some dynamic condition monitoring tests and research work done for combustion engines before but what I have seen didn't convince me. Alphabox system looks attractive but I am waiting for some theoretic explanation how you can analyse the following condition just from the tachometer signal: - compression variations - injection timing & condition - combustion - bearing and moving parts - pumps regulation - air suction -...
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Re: Alphabox - Diagnostic system for engines

Istec International ·
This Brochure provides good info i think
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Re: Alphabox - Diagnostic system for engines

Becar ·
OK, can you tell me from this brochure, how you can see the bearing fault from the tacho signal? Or any other fault? Sorry but Green-Orange-Red indicator is just not good enough explanation for me.
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Re: Diesel Fire Pump

Walt Strong ·
You have provided very little information! If it is a CAT engine, then they have vibration limits for overall level and specific frequencies. Try the new ISO guides for general overall limits. Here is a Google Search for diesel engine vibration limits: https://www.google.com/search?..........0.hwmZ087YTF8 Here is a link to another discussion: https://www.maintenance.org/top...ring-axial-vibration If you have (or think you have) a high vibration problem, then I recommend structural impact and...
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Re: Diesel Fire Pump

oju ·
Thanks for the reply Walt. I should have searched it first before adding this. Good information though. What do you use to measure the torsional vibration. This has be a remote monitoring situation so I don't know all the details. Unit is coupled with a u-joint assembly with only like a 3% vertical offset. Alignment has been taken checked multiple times. Last check was- Vertical was 0.175 offset .… ………............ no change Horizontal was 0.001 to So, now 0.003 …. 0.002in change Angular N...
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Re: Diesel Fire Pump

Walt Strong ·
I use two different systems for measuring torsional vibrations. A strain gauge-telemetry system. The strain gauge and battery-powered transmitter are mounted on the shaft near the coupling. The system measures shaft static torque, dynamic torque (torsional vibrations), and shaft power is calculated with shaft speed. The second system uses an encoder with an analog frequency to voltage converter. The system measures angular velocity from a sensor (optical or magnetic encoder) located at the...
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Re: Diesel Fire Pump

Dave Reynolds ·
http://www.clarkefire.com/Libr...ish_C13960.sflb.ashx Page 18 talks about drive shaft alignment http://cumminsfirepower.com/do...M_Manuals/16909_User 's_Guide_English.pdf Page 3-1 https://dps.mn.gov/divisions/s...08FirePumpsFound.pdf https://www.google.com/url?sa=...m=bv.116573086,d.amc
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Re: Diesel Fire Pump

John from PA ·
Your data refers to the normal horizontal and vertical. Can you provide a simple sketch showing the arrangement and transducer orientations? I would also put some effort into checking the u-joint. These are often the cause of issues in vertical pump arrangements driven by a diesel. If one end of the u-joint is directly coupled to the diesel flywheel they can especially be troublesome.
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Re: Diesel Fire Pump

Dan Timberlake ·
How many running hours between pump shaft failures? Or, just a bunch of routine test starts? Have you witnessed the starting behavior? Especially how much the engine moves (and driveshaft misalignment increases) even briefly when starting. Can you get good close up pictures of the broken pump shafts? I'm hoping (expecting) there will be some clues about whether the failure initiation is from bending or torsion. And also pix of the engine mounted on isolators. I'd be quizzing the pump...
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Re: Diesel Fire Pump

Dave Reynolds ·
https://www.fmglobal.com/asset...fmapprovals/1336.pdf There has been a recent change to NFPA guidelines on the use of "specific" type and OEM for torsional couplings connected to diesel engines. Our company performs annual fire pump tests for a wide range of clients, engines, electric motors and pump OEM's. Have yet to see an engine spring mounted and the pump rigid. Typically the engine and pump would be mounted to a steel base, then the base is spring isolated.
Event

Advanced RCM3 Facilitator Course

Topic

pump driven by diesel engine vibration limit

abonoor ·
gents any one have a vibration limit for the pump driven by diesel engine, we are going to buy 8 fire pumps driven by diesel engine and i want to know what is the vibration criteria ? many thanks all
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Re: pump driven by diesel engine vibration limit

OLI ·
I am luckily not using API that much so I suggest you try some suitable ISO standards like the general almost not valid anymore 10816-1, industrial machines 10816-3, recip 10816-6 and the "new" 10816-7 maybe you can have a supplier comply to those if they are more forgiving, or not? Another way to proceed would be to ask what limits they can deliver to and evaluate if it would be acceptable for you. Last time I had arguments around such machines was when the "old" recip standard that...
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Re: pump driven by diesel engine vibration limit

abonoor ·
the full story is that we want to purchase 8 fire pumps for project Enhancement of Fire Protection System (EFPS) in Refinery and those pumps will be all around the refinery ,we send the specifications specifies that the vibration levels shall be within the accepted limits as per API 610. As part of clarification, an contractor have informed us that the recommended pump manufacturers have stated that they cannot meet API-610 vibration limit for diesel firewater pumps due to the configuration.
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Re: pump driven by diesel engine vibration limit

OLI ·
In the purchasing process you should have agreed to follow some standards maybe. In theory the diesel is judged by diesel applicable standard and pump for applicable pump standard. IRL depending on coupling, mounting etc. you may have a spreading of vibration from the diesel all over. So it may depend on if you ride on the numbers in the standards or look at the reality. Olov
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Re: pump driven by diesel engine vibration limit

William_C._Foiles ·
I assume the vibration limit is for condition monitoring and not machinery protection. If and when there is a fire, one (usually) cannot shutdown a firewater pump. With eight pumps, perhaps there are some spares; most cases have spare capacity per requirement or regulation. The engine manufacturer will give some guidance. Hard mounted? Soft mounted? One of the issues for which you probably do not measure is torsional vibration. I have seen a few diesel driven firewater pumps fail because of...
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Re: pump driven by diesel engine vibration limit

William_C._Foiles ·
One should note that the 2010 version is an ISO document. ANSI/API STANDARD 610 ELEVENTH EDITION, SEPTEMBER 2010 ERRATA, JULY 2011 I SO 13709:2009 (Identical), Centrifugal pumps for petroleum, petrochemical and natural gas industries There is no reason that a vendor and user cannot use any document for the basis of acceptance. However, if you note the first sentence from the scope it says the following. T his International Standard specifies requirements for centrifugal pumps, including...
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Re: pump driven by diesel engine vibration limit

OLI ·
As petro devices as a fire pump or many other things are not that special wherever it is placed as compared to on a ship for example, they should be possible to run when needed regardless. If it is not possible to find a supplier to a standard like that it is a problem somewhere. Olov
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Re: pump driven by diesel engine vibration limit

danielmurillo87 ·
For Fire Systems you can take a look to the NFPA standards, for example to the NFPA 20. They usually quote the Hidraulic Institute, that you can search as ANSI/HI standards. Talking about the diesel engine there is the ISO 10816-6.
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Re: pump driven by diesel engine vibration limit

Raul Rios ·
Dear all: For Diesel Engine we prefer ISO 8528-9 : 1995 ‘Reciprocating internal combustion engine driven alternating current generating sets — Part 9: Measurement and evaluation of mechanical vibration’ Reagards, Raul Rios
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Re: pump driven by diesel engine vibration limit

Prabhu ·
For Diesel Engines ISO 8528-9 is much better. It was unable to make out the information mentioned in ISO 10816-6.
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Re: Obsolete Parts...A question about roles and responsiblities

Tarobb ·
I feel the task of specing out replacement equipment should fall on to the Reliability/Plant Engineer. They should have the best knowledge of the facilities operation and the needs of which the equipment needs to fulfill.
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Re: Obsolete Parts...A question about roles and responsiblities

Brian Buzard ·
Thanks for your response and I appreciate your point of view!
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Obsolete Parts...A question about roles and responsiblities

Brian Buzard ·
Hello all- In my organization, many of our assets are aging and some parts have become obsolete. My question is this: "Who should have the primary responsibility to spec out replacements for obsolete parts?" (A) Maintenance Planner (B) Reliability Engineer (C) Warehouse Very curious to hear your responses...
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Re: Obsolete Parts...A question about roles and responsiblities

Dboyd_hcm ·
In our plant, if a direct replacement has been suggested by the supplier the warehouse will send out the specs on the replacement part to all departments for approval before it is stocked. If no replacement has been suggested by the supplier it is left to the maintenance planner and/or reliability associate for the department(s) the part is used in to source the new part.
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Re: Obsolete Parts...A question about roles and responsiblities

Brian Buzard ·
Thanks DBOYD_HCM....interesting point of view
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Reliability Engineer

Azzur ·
APPLY HERE : https://www.ziprecruiter.com/job/4b1c6b85 Job Description: Provide and/or improve asset capacity & reliability through technical support of the maintenance function and effective utilization of the preventive and predictive maintenance processes. The Reliability Engineer is the primary user of equipment history. Through analysis of equipment operation and historical performance, utilization of cross-functional teams, and application of technical skills, along with creativity...
Event

RCM2 Introductory Course

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Program Manager II - Asset Management - Oakland, CA

Kim B ·
The selected candidates for the Program Manager II Asset Management, Maintenance & Engineering Department will be responsible for working within various areas of the Department including: Capacity and Infrastructure Planning: Including developing, planning, managing and overseeing the fleet capacity and infrastructure planning, as well as analyzing the plans for capital investments and operating measures necessary to expand the District’s capacity to serve anticipated growth to increase...
Topic

advice needed

ughojor michael ·
please i want to build a career in reliability engineering which part or training are necessary
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Re: advice needed

Dave Reynolds ·
http://study.com/articles/Be_a...nd_Requirements.html http://reliabilityweb.com/arti..._engineers_come_from http://www.payscale.com/resear...lity_Engineer/Salary Here are a few links that may get you started Dave
Topic

3X Fire Pump

Raul Rios ·
Hello everyone. I would like your valuable comments for the case that follows: This is a fire pump operated by a diesel engine by universal joint. The FFT graphics of the engine show 3X very dominant, which is transmitted up to the bearings of the pump. In addition they are appreciated interharmonic of 1/2 order in the engine. The question: Where does the 3X come from? .... Why does it manifest? Frequency of rotation: 1700 rpm # Cylinders: 6 BPF: Unknown I attached them some FFT and TWF and...
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Re: 3X Fire Pump

Alvin MC ·
diesel engines vibrate pretty high. thats nature of the beast. I would monitor and watch the trend. Do you have history on this equipment or is this baseline reading?
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Re: 3X Fire Pump

William_C._Foiles ·
I think if you do a star diagram for the forces on a 6-cylinder engine you can see that you cannot balance both the forces and moments, straight or V for the 3rd harmonic of running speed for a diesel. Perhaps, (I think this might work.) you can for a radial engine -- but you probably don't have one.
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Re: 3X Fire Pump

John from PA ·
It is entirely possible that the 3X originates with the diesel and is creating a torsional vibration. The possibility of such a frequency is a function of many variables of the engine; in-line or v configuration, firing order, 2-stroke or 4-stroke, number of cylinders, etc. Have you gone back to the diesel manufacturer and asked them about the issue? Usually the engine manufacturer is responsible for doing a torsional analysis. I have also seen odd harmonics from bad injectors. Do you have...
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Re: 3X Fire Pump

Walt Strong ·
I've measured vibrations and conducted shaft alignment on a very similar looking diesel fire pump. The half order is normal for a four cycle engine from reciprocating forces, and the 3X is normal for firing frequency of a six cylinder four cycle engine. I do not think a U-joint coupling is a good choice for the close-coupled machine arrangement. A coupling with an elastomer element be more appropriate. Keep an eye on the engine support mounts, because they can get loose or crack. These...
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Re: 3X Fire Pump

John from PA ·
I generally would be in agreement with this but I know of many machines in areas prone to earthquakes where fire pumps are required by the insurance carrier to have Cardon joints.
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Re: 3X Fire Pump

Raul Rios ·
Dear ALVIN: Are the achieved 3X levels considered very high or are they within the standard?
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Re: 3X Fire Pump

Raul Rios ·
Thank a lot Walt for you input...
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