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µ Y µ v D µ o ] r& o µ ] K>> ' K& K>> ' K& 'Z/ h>dhZ > E W ... Lumk… · W o v Ç ' ( } s o À...
Transcript of µ Y µ v D µ o ] r& o µ ] K>> ' K& K>> ' K& 'Z/ h>dhZ > E W ... Lumk… · W o v Ç ' ( } s o À...
![Page 1: µ Y µ v D µ o ] r& o µ ] K>> ' K& K>> ' K& 'Z/ h>dhZ > E W ... Lumk… · W o v Ç ' ( } s o À K v ] v P l o } ] v P ~W lD ^ Z ( } v v } µ v U u u l } v v } o v Ç ] U i µ](https://reader034.fdocuments.in/reader034/viewer/2022052016/602f53a8a750c91e884cb40f/html5/thumbnails/1.jpg)
COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Four-Quadrant Multi-Fluid Pump/Motor
Four Quadrant Multi-Fluid Pump-Motor
John LumkesPurdue University
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Overview
• Potential of a four-quadrant multi-fluid pump/motor?
• How we are achieving this?• What are the benefits?• Results from the first mechanically actuated prototype.• Moving forward…
John Lumkes 2
Mechanically actuated valve prototype
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Background
• Digital Four Quadrant Multi-fluid Pump/Motor• Digital: utilizes digital displacement control
• On/off valves at inlet and outlet of each piston
• Four-quadrant: capable of pumping and motoring each in CW and CCW rotation
• Multi-fluid: pump lubrication does not depend on operating fluid
John Lumkes 3
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
History (Purdue)
4
Cam Types
Valve Configuration
Implementation
Valve Improvement
Control Algorithms(Mode Switching and Valve Timing)
Sensor Reduction
Four-QuadrantMulti-Fluid Pump/Motor
John Lumkes
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Benefits
• General digital pump/motor advantages
• Eliminates valve plate losses• Leakage scales closely with
displacement• Pumping of non-conventional
fluids (water)• On/Off valves can open against
high pressure• Four quadrant operation• Self starting in motoring
• Specific advantages of proposed approach
• No need for pilot pressure• Higher efficiency • Simple, single lever, robust control
of displacement• No electrical energy needed• Lower cost
John Lumkes 5
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Operating Strategies
John Lumkes 6
◦ Flow Diverting Excess flow taken into the
chamber is diverted back to the low pressure port
◦ Flow Limiting Amount of flow taken into the
chamber is limited to the desired flow
◦ Sequential (Diverting or Limiting)
Individual cylinders are operated at full or zero displacement
4
20 BarInlet
320 BarOutlet
Valve 1 Valve 2
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
◦ Flow Diverting Excess flow taken into the
chamber is diverted back to the low pressure port
◦ Flow Limiting Amount of flow taken into the
chamber is limited to the desired flow
◦ Sequential (Diverting or Limiting)
Individual cylinders are operated at full or zero displacement
Operating Strategies
Digital displacement control
4
20 BarInlet
320 BarOutlet
Valve 1 Valve 2
John Lumkes 7
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Electrically Actuated Valves (EAV)
• Valves actuated using solenoids• Low repeatability• Requires additional sensors and
embedded controls
John Lumkes 8
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Mechanically Actuated Valves (MAV)
• MAV Advantages• Fast actuation• No electrical energy needed• No additional sensors and embedded controls• Actuation repeatability is increased
• Critical for efficiency
John Lumkes 9
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Operating StrategyState Analysis
John Lumkes 10
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Cam Phasing
John Lumkes 11
Planetary Gearsets for Valve Opening/Closing(P/M Shaft connected to sun, cam masks connected to planetary carrier, adjustable rings)
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Implementation
John Lumkes 12
Inline Piston Pump
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Prototype
John Lumkes 13
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Experimental Test Stand
• Multi-piston digital pump/motor test stand
John Lumkes 14
• 3-piston digital pump
• One on/off valves per piston
• One check valve per piston
• Three 2,000 Hz pressure transducers
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Experimental Testing
John Lumkes
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Results for Mechanical Actuation
• Partial flow diverting shown here• Efficiency does not fall below 40%
John Lumkes 16
Overall hydraulic efficiency for pumping at 300rpm (left), 500rpm (right)
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
John Lumkes 17
103 bar, 500 rpm103 bar, 300 rpm
34 bar, 500 rpm34 bar, 300 rpm
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
GT Suite Overview• 1D multi-physics system simulation software• GT-Suite Tools
• CAD modeling and preparation • Converting 3D CAD model into GT model• Model building and run control• Post processing
• Hydraulics applications• System and component level models• Existing piston pump and valve component templates• Accurate pressure wave dynamics• Advanced features such as DoE and optimization
John Lumkes 18
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
MAV Inline Schematic
John Lumkes 19
HP
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
CAD Model Preparation
John Lumkes 20
Solid block
Flow volumes selected
Flow volumes extracted
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Converting to GT Components
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Split into individual parts Converted into pipes and flow-splits
John Lumkes
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
MAV Inline Simulation
John Lumkes 22
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
One Piston Simulation
John Lumkes 23
Piston crank-slider input• Angle and speed defined by
main driver
• Piston stroke angle profile
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
One Piston Simulation
John Lumkes 24
Check valve• Flapper disk dimensions• Spring properties
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
One Piston Simulation
John Lumkes 25
On/off valve• Valve opening area• Poppet parameters
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
MAV Inline Simulation
John Lumkes 26
103 bar, 500 rpm, 100% displacement
103 bar, 500 rpm, 100% displacement
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Inline Simulation Results
John Lumkes 27
Efficiency plots for 1500psi, 500 rpm• Top Left- Volumetric Efficiency• Top Right- Mechanical Efficiency• Bottom- Total Efficiency
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Next Generation MAV
• Optimal design, open-ended approach• Requirements
• One cam assembly for all pistons• Minimal gearing• Smaller physical size• Four quadrant capability
John Lumkes 28
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Radial Piston Orientation
• Benefits • Access to valves• Thru-shaft• Modular and compact design• Fewer moving parts
John Lumkes 29
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Radial Piston Orientation
John Lumkes 30
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Radial Piston Orientation
John Lumkes 31
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Summary
• Tested inline unit on existing digital pump/motor test stand• Results provided proof of concept for mechanical actuation
• Modeled and simulated inline unit• Validated modeling techniques
• Model and simulate radial unit• Use simulation to determine optimal parameters
John Lumkes 32
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COLLEGE OF COLLEGE OF AGRICULTURAL ANDAGRICULTURE ENGINEERING BIOLOGICAL ENGINEERING
Contact Information
John Lumkes 33
John [email protected] & Biological Engineering225 S. University St.West Lafayette, IN 47907