Vane pump for AIrbus

Pump spec :
Weight = 76 grams (topology optimized version 62 grams ) without a motor
Q=7-10l/min (can be controlled with speed of the motor)
H=47m (about 5 bar) It can be modified to produce 10 bar by increasing radius of rotor and enloser by 2 and decreasing the speed of motor by 2.

Design process:
The most applicable pumps to use for this application are centrifugal type, gear, screw pumps and rotary vane pumps due to high pressure requirements and low flow with low pulsation.

Centrifugal pump will require multiple stages to get that small flow with high pressure which will make the assembly bulkier and more expensive to manufacture

Gear and screw pumps have higher pulsation rate than rotary vane as well as slightly lower efficiency. Also they are difficult and expensive to manufacture and maintain.

So I decided that rotary vane pump type is the most suitable in this application due to low pulsation (so we can achieve +-5% of the specified flow) , small size/ low weight , being easy to repair and cheap to manufacture.

Replaceable vanes can be really easily replaced when needed

I decided to design one action pump since the pressure is less 105kg/cm3 which doesn't create excessive pressure on the bearings and doesn't need to be compensated from the opposite side with the second 2nd action pressure.

I decided to use hollow steel shaft to decrease the weight. The shaft can be made from titanium as well to save some weight but it will increase the cost.

See attached picture for calculations proving design (if you need detailed calculations please ask) and FEA.

Safety factor is 2.

The weight turned out to be very small and I was able to decrease it even more using topology optimization


Material choice:

I picked PEEK (Polyether ether ketone) due to PEEK has cheaper manufacturing cost , harder , has better wear and friction , chemical resistance, lower density than aluminum and has cheaper manufacturing cost, has fewer leachables , has better dry wear properties, has better chemical resistance, has lower density than steel.

Bolts :
The force in one pump opening is about 1774 N

I recommend using M5 PEEK bolts reinforced with fiberglass (2160 N proof load per bolt, fiber glass almost triples the strength of peek bolts ).
Also there is an option using Aluminum 6061-T6 (2480 N proof load per bolt ) bolts and Stainless steel bolts (3200 N proof load per bolt ) however it will add some weight.

Manufacturing tips/ Assembly:
Rotor a...