Pump Skid with a 300HP Diesel Engine

[PW2006]

[blue]I am designing a pump skid for a centrifugal pump and a 300hp diesel engine. This skid will be mounted on the floor of a standard ISO 20ft container.

Are there any guidance available or any special areas needs to be careful?

If I use universal joint to connect the diesel engine to the pump rather than jaw type coupling (w/ rubber spider), is it better by helping isolate the vibration from the diesel engine?

Thanks. [/blue]

 

[JJPellin]

A universal joint drive shaft will allow for greater misalignment between the engine and pump. The downside is that it takes up more axial space than a standard flexible coupling. It is also important that the drive shaft has a minimum offset based on the manufacturer's recommendation. In other words, you don't want to align a drive shaft too well. It needs a certain amount of misalignment in order to get movement on the needle bearings and proper grease lubrication within the bearings. The drive shaft will tend to be torsionally stiffer and will actually transfer more of the engine torsional vibration to the pump. A elastomeric coupling would dampen out more of this. I would still prefer the drive shaft over the coupling because of the unstable mounting surface and likely changes to alignment during operation. If it was mounted on a foundation, I would prefer the coupling.

 

[Artisi]

JJPellin
Good advice to PW2006.
However, I would design a rigid pump / engine baseplate c/w an elastomer coupling ie. "rubber tyre" type from Fenner or Dodge and then mount the unit on vibration eliminators to the container floor.
This is arrangement has been done many times without any operating problems.
Also - make sure if you shut the door on the container the engine can breathe, the engine cooling air and exhaust are not restricted.

Naresuan University
Phitsanulok
Thailand

 

[BigInch]

And anybody inside can get out.

Going the Big Inch!

http://virtualpipeline.spaces.msn.com

 

[PW2006]

Thank you very much. JJPellin and Artisi.

(1) Based on your experience, what type and brand of vibration eliminators do you use? And for a 12ft long x 3ft wide skid rectangular skid, how many eliminators do you normally use? My total skid weight is approx. 4500 lbs.

(2) The container has a 1.125" thick wood board floor. Under the wood floor, there are cross 4" channels at the space of approx. 16" each. Do I need to reinforce this container floor and its support? I am thinking about sit the pump skid on the floor, drill through the wood, and bolt the skid frame on the underneath cross channels of the container.

(3) How do you think about building a containing wall (or box) around the pump skid and put in gravels to bury the skid (almost to the level of the top of the skid frame)? Does this really help?

Thanks.

 

[Artisi]

Maybe with the timber floor I would just bolt the base down onto the timber as you have suggested, but make sure you don't deform the pump / engine aligment - check before pumping the pump into service.

Why the gravel?? unless you want to plant some grass and you need to have good drainage - can't see any good reason for this.

Naresuan University
Phitsanulok
Thailand