Note that drawing says there is no thrust (axial) bearing! Any flat rigid (main block or head) that is perpendicular to shaft axis should be fine. I would choose one axial point and one radial point. The drawing also says it can run for 40,000 hours, so be patient with your monitoring! Remember that vibrations are mostly from piston pulsation, so amplitude and harmonic content are dependent on shaft speed and load/pressure. It can be a challenge to measure always at same operating point. Be aware of Cavitation due to poor suction conditions.
If the pump you've portrayed is what you have, then Walt is correct in stating there isn't any thrust bearing. That is because the pump uses a double sided counterbalanced swashblock. In short, that means pistons are on both sides of the swashblock.
Thank you Walt and John.
You are both correct about the thrust bearings not being there. There are also pistons on both sides. I will take some readings at high pressures and update this post. Thank you.
Just an update on the vibration readings.
I used the following to record the vibrations:
1. Hand held "tpi 9080"
2. IEPE 19.74 mV/g accelerometer attached to a Roga IEPE amplifier attached to a
"PicoScope 4824 Oscilloscope".
The results are are in the PDF attached. The uniqueness of the pump has shown some unusual FFT graphs using the Picoscope.
Also, if you have any more questions about the pump let me know.
This is the FFT in the axial direction.
This is the TWF at the axial position.
This is the FFT in the axial position, at the same operating condition, but using the Picoscope:
This is a sample of the TWF in the axial direction using the Picoscope:
This is the FFT in Vertical direction using the tpi 9080.
This is the TWF in the Vertical Direction using the tpi 9080
This is the FFT in the Vertical direction using the Picoscope
This is a sample of the TWF using the Picoscope