HurleyByrd
Aluminum
- Joined
- Jan 21, 2011
- Location
- WV United States
Hi All,
I am working on an 8GPM External Gear Pump having a 1/2" set of steel gears. The pump had overheated and scored its internal aluminum plates that seal the gears. We have ground down the plates in order to achieve a nice smooth and tight seal for the gears once more. But now we need to grind down the width of the outside aluminum housing to establish the internal squash/clearance.
Does anyone have sound information regarding the clearance needed internally? As per this pump at the moment...... the internal gears and side plate stack is 1.830" and we have ground the outside housing to 1.840. I feel .010" is far too much clearance and feel something more like .002" or less is required.
I suspect these pumps are built like this to accommodate the heating of the metals internally. A pump may run upward of 220+- degrees if I recall correctly. The difference between the internal stack and the external housing must have some sort of compensation. I am unable to Google anything worthy.
Your thoughts.
Thanks
Pete
I am working on an 8GPM External Gear Pump having a 1/2" set of steel gears. The pump had overheated and scored its internal aluminum plates that seal the gears. We have ground down the plates in order to achieve a nice smooth and tight seal for the gears once more. But now we need to grind down the width of the outside aluminum housing to establish the internal squash/clearance.
Does anyone have sound information regarding the clearance needed internally? As per this pump at the moment...... the internal gears and side plate stack is 1.830" and we have ground the outside housing to 1.840. I feel .010" is far too much clearance and feel something more like .002" or less is required.
I suspect these pumps are built like this to accommodate the heating of the metals internally. A pump may run upward of 220+- degrees if I recall correctly. The difference between the internal stack and the external housing must have some sort of compensation. I am unable to Google anything worthy.
Your thoughts.
Thanks
Pete