Recent content by crjones

The pulsations are at four times per revolution, the rotor passing frequency. So the basic frequency is rpm*4/60. There are several other frequencies in the gas flow based on the discharge port. I agree with DLiteE30 you need a better transducer.

The question comes down to are you willing to pay for compliance to a specification. Many people want compliance to ANSI/ASME, ISO or API but want standard pricing of an industrial machine. Manufacturers will comply with government body regulations or insurance regulations in the markets they...

NFPA has a number of standards to get you started.

Open a sketch, then go to Tools/Sketch Tools/Sketch picture. Insert your jpeg.

Tuthill has a new noise reduction blower that has been at some shows.

Thank you

I am working with a design table in 2010 sp4 and have a message when i try to open it of "design table created in Excel 2003 and can not be opened in Excel 2003." Anyone else run into this?

I use the top down technique on our assemblies consisting of between 150-200 components. I create a lot reference planes. And I make extensive use of the isolate command to reduce confusion from parts that I am not working with.

BigInch, I have found some of the most inept engineers have the PE behind their names. So letters behind a name seem to me to be ego strokes. So I have never used them and never will except where required by law.

You might try Universal Silencer out of Wisconsin or Stoddard Silencer in Illinois

Engine superchargers and turbochargers are essentially the same as what you are asking. In vacuum a pd blower is used to boost the performance of pump. The issue is that each system can only take so much boost before you exceed the capabilities of the downstream unit(compressor, engine,etc).

There is not any requirement to bypass air to maintain lubrication. I ran a unit for a year unload with the inlet sealed with no detrimental effect as a test of this point. The bypass air is there solely to eliminate the transition noise from load to unload. You have a minimum pressure valve...

The rotor also moves as the coils are energized and it seeks its magnetic center. So C3 allows it to move without adding preload to the bearing

My impression is that for the ISO standards you produce your product in a consistent and defined fashion. It assumes that it will cause you to recognize areas of improvement, but it does not mandate that you make a quality product, just do you document what you do.

Try the differential pressure times the flowrate times a unit correction factor and you have adiabatic work. Divide this by an estimated efficiency and you will have a starting point