Ge Rotor Pump displacement calculation and flow rate

[Sachin Tyagi]

Can some share me Ge-rotor pump displacement calculation, this product is new for me.

I have physical samples and need to increase flow rate of this pump. before that I want to calculate displacement and flow rate.

Regards
Sachin

 

[mfgenggear]

Sachin Tyagi (Mechanical)(OP)25 May 21 09:33
Can some share me Ge-rotor pump displacement calculation, this product is new for me.

I have physical samples and need to increase flow rate of this pump. before that I want to calculate displacement and flow rate.

Regards
Sachin

Sachin
have you tried contacting the manufacture?

 

[electricpete]

It's a pd pump. You could calculate it theoretically from geometry and speed using approach in the free pdf here.

But it seems like a lot less trouble to ask the manufacturer (as suggested above) or even doing a test.

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(2B)+(2B)' ?

 

[Sachin Tyagi]

Hi mfgenggear,

Thanks!

Manufactures are not willing to share their design calculation in India.

I have tried many ways and found big difference between physical sample's displacement and flow rate (Tested on test rig) and mathematical calculation's flow rate and displacement.

Hi electricpete (Electrical),

thanks for PDF, this PDF i do have and this is for profile design of ge-rotors (Inner and outer), didnt found any calculation regarding displacement and flow rate.

Thanks
Sachin

 

[hydtools]

This may be of some help. The gerotor type number is structured: the last three digits are the element displacement; the first one or two digits is/are the number of teeth on the inner gear.

Ted

 

[hydtools]

This file is the Nichols gerotor selection and design catalog.

Ted

 

[3DDave]

I'm curious how large the "big difference" is.

hydtools - I cannot for the life of me download that second file. I think the problem is the "&" in the middle of it.

 

[hydtools]

3DDave,
Try this link.

Ted

 

[3DDave]

Much better - Thanks.

 

[hydtools]

Changing out the ampersand in the name made the difference. Thank you.

Ted

 

[electricpete]

I don't like these pumps. They tend to chew up the motor keyway as shown attached.
Example slide 1 - broke the keyway.
Example slides 2 - 4 worn keyway on shaft and impeller.

The impeller has to be a loose fit to the shaft in order to allow it to slide axially for sealing.
This is unusual among pumps in my experience, I'm not sure if it's a contributor.
I'm not sure if there is some oscillatory torque on the keyway.
We try to fit the keys relatively tightly to keep them from rolling like in slide 2-4.

=====================================
(2B)+(2B)' ?

 

[Sachin Tyagi]

Thanks hydtools.

But I have already these PDF files.

thank you all for your support.

Regards
Sachin Tyagi