all-inclusive simulation process development of piston ......all-inclusive simulation process...
TRANSCRIPT
![Page 1: All-Inclusive Simulation Process Development of Piston ......All-Inclusive Simulation Process Development of Piston Pumps with GT-SUITE Guoqi Chen Virtual Product Development ... (piston](https://reader034.vdocument.in/reader034/viewer/2022042111/5e8c4691a73917790261fcd4/html5/thumbnails/1.jpg)
Caterpillar: Non-Confidential
All-Inclusive Simulation Process Development
of Piston Pumps with GT-SUITE
Guoqi Chen
Virtual Product Development
November 6, 2017
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Caterpillar: Non-Confidential
Agenda
• About Caterpillar
• Project background
• Modeling strategies
• Piston pump models
• Modeling approach
• Simulation validation
• Summary
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Caterpillar: Non-Confidential
Products and Industries
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Caterpillar: Non-Confidential
Virtual Product Development (VPD)
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VPD is a product development approach driven by
physics-based simulation
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Caterpillar: Non-Confidential
Project Background
• Modeling process development for machine cold start
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Hydraulic pumps (piston & gear) simulation is one of the major elements in whole machine cold start simulation process
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Caterpillar: Non-Confidential
Machine Cold Start
• Sub-systems in machine
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Caterpillar: Non-Confidential
Simulation Process Development
• Modeling strategies
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Caterpillar: Non-Confidential
Simulation Process Development• 1D modeling tools
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Caterpillar: Non-Confidential
Piston Pump Models• Cat® machine steering pump: a variable displacement piston pump
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Caterpillar: Non-Confidential
Modeling Approach
• Piston pump intake & discharge flow area profiles
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Caterpillar: Non-Confidential
Modeling Approach
• Piston torque on the swashplate– Support force – torque Ts
1. Fs = Fp/cos(a) = P*A/cos(a)2. Torque arm = r*cos(q)/cos(a)
Ts = P*A*r*cos(q)/cos(a)2
– Inertia force – torque Ti
Ti = - Mp*w2*r2*tan(a)*cos(q)2/cos(a)
– Total torque T from a piston
T = [P*A*r*cos(q) _ Mp*w2*r2*sin(a)*cos(q)2]/cos(a)2
– References:1. Zeiger, G., and Akers, A., 1985, “ Torque on the Swashplate of an Axial Piston
Pump,” ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL, Vol. 107, pp. 220-226.
2. Manring, N. D., 1998, “ The Torque on the Input Shaft of an Axial-Piston Swash-Plate Type Hydrostatic Pump,” ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL, Vol. 120, pp. 57-62.
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used in the current GT-SUITE example model
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Caterpillar: Non-Confidential
Simulation Validation
• Comparison with GT-SUITE – flow rate & pressure
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Different pump speeds
(100% Disp, 80oC Oil, and 2500KPa Poutlet )
Different pump displacements
(1800RPM, 80oC Oil, and 2500KPa Poutlet )
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Caterpillar: Non-Confidential
Simulation Validation
• Comparison with GT-SUITE – flow rate & pressure (cont’d)
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Different pump outlet pressures
(1800RPM, 80oC Oil, and 100% Disp)
Different oil temperatures
(1800RPM, 50% Disp, and 2500KPa Poutlet )
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Caterpillar: Non-Confidential
Simulation Validation
• Correlation with performance test data – efficiency
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Caterpillar: Non-Confidential
Simulation Validation
• Comparison with GT-SUITE – variable displacement
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Caterpillar: Non-Confidential
Simulation Validation
• Validation by cold start data – pump torque
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Caterpillar: Non-Confidential
Summary
• Simulation process development– The simulation process demonstrates promising modeling capabilities with a high accuracy for
a variable displacement piston pump
– GT-SUITE helps us to do model correlation/validation, and create a high confidence in our
all-inclusive (any operating conditions & any performance data) simulation process
• Next steps– Work with test teams to expand the modeling process for load sensing control cases
– Gear pump modeling development
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Caterpillar: Non-Confidential
Thank You
Caterpillar Inc.
For more than 80 years, Caterpillar Inc. has been making progress possible and driving positive and sustainable change on every continent. With
2010 sales and revenues of $42.588 billion, Caterpillar is the world’s leading manufacturer of construction and mining equipment, diesel and natural
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