LOW RIPPLE SOLUTION: VANEINGROOVE PUMP WITH PRECOMPRESSION

1
LOW RIPPLE SOLUTION VANE-IN-GROOVE PUMPWITH
PRECOMPRESSION
A. Stroganov, L. Sheshin, Y. Volkov, S. Ryadnov,
A. Nikiforov Lumex JSC., Saint-Petersburg, Russia
2
Statement of Problem
3
Origin of Ripple Transferred Volume is Closed
Transferred Volume
Outlet
Forward Transfer Limiter
Inlet
Groove (Working Chamber)
Vane
Working part
Adaptive Rotor
Vane Chamber
Force Chamber
Supporting part
Supporting Cavity
Rotor rotation
4
Origin of Ripple Transferred Volume is Open
Transferred Volume
Outlet
Forward Transfer Limiter
Inlet
Groove (Working Chamber)
Vane
Working part
Adaptive Rotor
Vane Chamber
Force Chamber
Supporting part
Supporting Cavity
Rotor rotation
5
Reduction of Decompression Impact Mass Transfer
Transferred Volume
Outlet
Forward Transfer Limiter
Inlet
Groove (Working Chamber)
Vane
Working part
Adaptive Rotor
Vane Chamber
Force Chamber
Supporting part
Supporting Cavity
Rotor rotation
6
Adaptive Rotor Tool for Precompression
Working part
Supporting part
Groove
Force Chambers
7
Reduction of Decompression Impact Precompression
Active Precompression System
Transferred Volume
Forward Transfer Limiter
Inlet Zone
Outlet Zone
Tilt of Supporting Part
Working part
Variation of Force Chamber Length (at rotation)
Force Chamber of variable length
Tilt Angle
Supporting part
Variation of Pressure in Transferred Volume (at
rotation)
8
Precompression Adjustment
There are two methods to adjust the
precompression degree for outlet pressure
Tilt angle variation lower residual ripple
1.
Fluid relief for preventing excessive
precompression at constant tilt angle cheaper
in manufacturing
2.
9
Precompression Adjustment Fluid Relief
Volume
Pressure
Pin
Pout
Pi
Working part
Mass
Force Chamber of variable length
Tilt Angle
Supporting part
10
Hydraulic Circuit of the Test Rig
1 electromotor gear box 2 tachometer
torquemeter 3 tested pump 4 fluid tank
5, 12, 15 filters 6, 7, 13 thermometers 8
pressure sensor 9 adjustable load throttle
10, 14 flowmeters 11 counter-current flow
cooler 16 pressure gauge
11
Test Rig Photos
Pump Displacement 28 cm3 Working Fluid similar
to HLP 46 Temperature 30 5 C Test matrix -
Working Pressure 10, 20 and 30 MPa - Rotation
Speed 1500 rpm Max Drive Power 30 kW
12
Test Results Pressure Ripples at 300 bar
Without APS
13
Test Results Pressure Ripples at 300 bar
With APS
14
Test Results Pressure Ripples at 100 bar
With APS
15
Test Results Pressure Ripples at 200 bar
With APS
16
Theoretical Pressure Pulsations at 400 bar
With APS
With APS version 1
With APS version 2
Without APS
17
Conclusion
Pressure Ripple is lost, sorry for inconvenience
Looks like it was chewed up by this fellow
18
Conclusions
1.
APS significantly reduces outlet pressure ripple
from 17 - down to 1,2
APS transforms sharp decompression pressure
pulsation to relatively small secondary kinematic
nonuniformity of pump delivery which in its turn
reduces fluid born noise component of total pump
noise
2.
APS allows to return some part of energy
otherwise being wasted on decompression
3.
19
TO BE CONTINUED