Download presentation
Presentation is loading. Please wait.
Published byKristian Cobb Modified over 9 years ago
1
P11251: Side Entry Agitator Test Stand REVISION A: For Reading/Review ONLY (No Formal Presentation Given) MSD I: System Level Design Review https://edge.rit.edu/content/P11251/public/Home
2
Project Team/Attendees Project Sponsor : Richard O. Kehn - "ROK" Senior Technologist - Mixing SPX Flow Technology MSD I, Team Guide: William J. Nowak Principal Engineer, BGO/XIG/XRCW/OSL/Media & Mechatronic Systems Xerox Corporation Team P11251: Kurt Lutz: P.M./(Measurement System w/ Integration) Dennis Beatty: (Fluid-Tight Sealing Structure) Joseph Bunjevac: (Physical Structure w/ Adjustability) Daniel Geiyer: (Measurement System w/ Integration) Gregory McCarthy: Scribe/(Motor/Shaft/Coupling Integration)
3
Meeting Agenda Mission Statement Project Description Review of Customer Needs/Specs Review of Pairwise, Engineering Metrics, HoQ, Pareto Concept Sub-System Breakdown Initial Concept Generation & Selection Physical Structure Shaft/Motor/Impeller Integration Sealing System Measurement System w/ Hardware Integration Preliminary Risk Assessment/FMEA Project Schedule Review (GANTT) Questions/Comments/Concerns Estimated Time 12:35 - 12:40 12:40 - 12:45 12:45 - 1:50 12:50 - 12:55 12:55 - 1:00 1:00 - 1:40 1:00 - 1:10 1:10 - 1:20 1:20 - 1:30 1:30 - 1:40 1:40 - 1:50 1:50 - 1:55 1:55 - 2:00
4
Mission Statement Mission Statement: To create a side entry agitator test stand that allows the user to measure and calculate axial and tangential components of fluid forces, torque, and impeller speed on the motor, impeller, and shaft, incorporating a wide range of adjustable parameters.
5
Project Description Shaft protrudes through the side wall of the tank very large, under floor tanks where little headroom is available less costly than top entry mixers requires less motor torque to agitate the fluid three to five times the amount of power as a top entry mixer Rely heavily on impeller selection different diameters, physical sizes and blade profiles Previously developed top entry test-rig they currently have no way to benchmark these same impellers for side entry agitation Create a test-rig that allows reliable measurement through a range of adjustability (Impellers/Speeds/etc.) similar concepts to the top entry test rig different array of: bending moments, torque and fluid forces Very beneficial to our customer benchmark existing and future impeller designs for side entry applications.
6
Customer Requirements Four Most Important Customer Needs: Fluid Tight Seal Calibration Incorporation Tangential Fluid Forces Fluid Thrust Force
7
Pairwise Comparison
8
Graphical Representation of Pairwise Comparison
9
Engineering Metrics
10
House of Quality
11
Pareto Analysis of Eng. Metrics
12
Power Law Distribution By designing for only 40% of the Engineering Metrics, We’ll gain 65% of the advantages of designing for all the Engineering Metrics Top (5) Most Important Engineering Metrics Tangential Force Measurement Thrust Force Measurement Shaft Rotational Speed Torque Measurement Ease of Calibration Time of Calibration
13
Concept Sub-System Breakdown
14
Physical Structure Sub-System Stand Adjustability Vertical and horizontal adjustment Depth into tank Angle left and right Angle up and down
15
Physical Structure: Concept Drawings
16
Physical Structure: PUGH Matrix Height Adjustment Weight Concept Ball Screw Scissors Jack Linear Rail Columns Customer Needs Calibration 50 00 Repeatability 4101 Test Stand Independent 4000 Height Adjustment 3000 Time for Setup 1000 Appearance 1000 Additional Criteria Cost 4 Ease of Fabrication 4111 Complexity 2111 Stand Size 2001 Potential for Slop 4111 Increments of adjustment 3000 TOTAL 100612
17
Physical Structure: PUGH Matrix Horizontal Adjustment Weight Concepts Rails Ball Screw Ground Rods Plate with Pins Floating Plate with magnetic locking Customer Needs Calibration 500 Repeatability 4 Test Stand Independent 40000 Horizontal Adjustment 31111 Time for Setup 1111 Appearance 1000 Additional Criteria Cost 4 1 Ease of Fabrication 40011 Complexity 2000 Stand Size 20000 Potential for Slop 4 Increments of adjustment 31111 TOTAL -5 20-11
18
Physical Structure: PUGH Matrix Depth Adjustment Weight Concepts Move Impeller on shaft Rails Ball Screw Plate with Pins Floating Plate with magnetic lock Customer Needs Calibration 500 0 Repeatability 400 Test Stand Independent 40000 Distance Into Tank 20000 Time for Setup 1011 Appearance 10000 Additional Criteria Cost 4100 Ease of Fabrication 41001 Complexity 2100 Stand Size 21000 Potential for Slop 4 0 Increments of adjustment 31111 TOTAL 2040-8
19
Physical Structure: PUGH Matrix Vertical Angle Adjustment Weight Concepts Wedge Screw Rotary Disc Curved Track Gear Adjustment Tilt Table Columns Cable Suspension Customer Needs Calibration 501 11 Repeatability 40011 Test Stand Independent 4000000 Vertical Angle 3000000 Time for Setup 100000 Appearance 1000000 Additional Criteria Cost 4110010 Ease of Fabrication 411011 Complexity 210110 Stand Size 200000 Potential for Slop 400000 Increments of adjustment 3000000 TOTAL 611-501519-20
20
Physical Structure: PUGH Matrix Horizontal Angle Adjustment Weight Concepts Curved Track Rotary Table Swivel Plate Cable Suspension Floating plate with magnetic lock Customer Needs Calibration 50 Repeatability 40 Test Stand Independent 40000 Horizontal Angle 3100 Time for Setup 100 Appearance 10000 Additional Criteria Cost 40100 Ease of Fabrication 4000 Complexity 200 Stand Size 20 1 Potential for Slop 40 Increments of adjustment 30000 TOTAL 10-9-25-14
21
Physical Structure: PUGH Matrix System Design Weight Concepts Rails with servos and screw with a tilt and rotary plate Ground rods instead of rails with locks Stand with Vertical Angle ajustment 'floating' on base plate Plate with pre-drilled holes for positioning motor with tilt plate Suspend motor by inverting Rail concept Four columns with ball screws with curved track. No depth Pre-drilled plate concept with a mounting rail with 1" adjustability Custom plate per setup Ball joint on plate. Ground rod with ball screw for all movement. Swivel plate Linear rail for vertical, horizontal, depth with rotary table Customer Needs Calibration 500 0001 00 Repeatability 40 0001 00 Test Stand Independent 40000000000 Height Adjustment 3000010011 Horizontal Angle 3001000100 Vertical Angle 3000010100 Distance Into Tank 2000000001 Time for Setup 11 0001 0 Appearance 1000000 00 Additional Criteria Cost 400 00 00 Ease of Fabrication 400 01 Complexity 2 0 001 00 Stand Size 2 10101000 Potential for Slop 41 0 1 00 Allows full range of motion 5111111111 Increments of adjustment 3111111111 TOTAL 1-50-7124-1169
22
Physical Structure: Concept Selection Key Advantages Removes need for tilt plate Reduces potential issue with structure height No limit to step increments on any axis Possibility for fully automated positioning via stepper motors
23
Shaft, Motor, & Impeller Integration Sub-System Explanation of this sub-system & components: Shaft: Transmits torque & angular velocity via the motor & impeller Coupler: Transmits power between the motor output shaft & shaft Motor: Provides Mechanical Energy to the system Impeller: “Work” horse of the system: agitates the fluid to be mixed ShaftImpellerCouplingMotor Tank Wall Fluid Agitation
24
SMI: System Diagram w/ Impellers Given Impeller Dia.: 4.5 – 10” Off Wall Distance: TYP. 0.5D <0.4D, Flow Drops Off >0.5D, Minimal Additional Flow, Adds Cost for Minimal flow benefit MATL: 316 S.S. 6”Ø: 2” 10Ø: 3”
25
SMI: Shaft Design Selection Shaft Length, (From Tank Wall) = APROX. 2.25 – 5”
26
SMI: Shaft Design Selection PUGH Best Choice: Solid, Continuously Long Shaft
27
SMI: Shaft Design Prelim. Equations Static Cantilever Beam Analysis Mod-Goodman Shaft Analysis Natural Frequency Ck
28
SMI: Shaft to Shaft Coupling Set Screw Disc Gear All must have high torsional strength, for accurate fluid force & thrust measurement Minimize parallel mis-alignment (RIGID) for accurate fluid force & thrust measurement Provide a secure connection between the (2) elements Long lasting and minimal maintenance/overhaul required Manuf: LoveJoy Req’s: 1) Required Max Torque 2) Motor Speed/HP Req. 3) Shaft/Motor Shaft Dia. Thru-Bolt
29
SMI: Shaft Coupling PUGH Best Choice: Thru Bolt or Set Screw Thru Bolt for Added Rigidity & Resistance to Torsion
30
SMI: Impeller/Shaft Connection Based on given ID of provided impellers, (3) conditions could exist: 1)Shaft Dia. < Impeller Dia. - need for a spacing collar 2)Shaft Dia. > Impeller Dia. - need for a reducer 3) Impeller has threaded spacer that screws onto end of shaft (Similar to 2)
31
SMI: Impeller/Shaft Connection PUGH Best Choice: Spacing Collar Method currently being used by industry OR Direct connect to shaft, if Shaft OD=Impeller ID
32
SMI: Motor Selection DC or AC Motor Variable Drive (per Measurement & Integration) Highly dependent on “Physical Stand” Package Size/Weight/Mounting Options Capable of reaching 1100 RPM under load, with greatest thrust/torque producing impeller Spec’d based upon required shaft size Consider Side-Loading Effect on Motor Bearings/Life NEMA Rating for environment/safety
33
Sealing System: Initial Concepts Concept 1 Concept 4,5,6,7 Concept 3 Concept 2
34
Sealing System: Initial Concepts Concept 10 Concept 11 Concept 8 Concept 9 Concept 12 Concept 13
35
Sealing System: PUGH
36
Sealing System: Final Concept Critical Benefits: Allows Adjustability Less parasitic to measured forces Does not alter tank geometry Very low leak rate
37
Axial and Tangential Fluid Force Measurement Concept Generation Measurement Technology: Strain Gauge; Donut, Pancake, Canister, or Column Load Cell; or Accelerometer. Location of Measurement Devices: On the motor mount, beneath the coupler, or on the end of the shaft. Motor Mount Design: Parallel Plates, Lever Arms, Shear Support Pins, Load Cell Cocoon, or Parallel Plates with Pointed Pivot. Pictures from www.lcmsyst ems.com. T=(L 1 /L 2 )FPins resist shear effects. Picture from www.circuits today.com Picture from www.einstei n.standford. edu Motor Inner and outer support boxes.
38
Axial and Tangential Fluid Force Measurement Concept Evaluation
39
Axial and Tangential Fluid Force Measurement Concept Selection Three Most Critical Criteria : Resists Affects of Shear Measuring Sensitivity Appropriate Time for Setup Low Profile, Tension & Compression Load Cell Mounted to Parallel Plates with Shear Pins optional depending on supporting calculations. Side ViewIsometric ViewPicture From www.lcmsystems.com
40
Slip Ring: Electrical connection through a rotating assembly Low speed limitations Ring wear and dust brushes impede signal transfer Requires routine maintenance for cleaning Torque and RPM Measurement Subsystem
41
Rotary Transformer: Tolerates high speeds Non-contact More accurate Requires sophisticated signal condition instrumentation Less tolerant to extraneous loading conditions (bending moments and thrust forces) Torque and RPM Measurement Subsystem
42
Digital Telemetry: Software driven allowing changes on the fly High resolution, sensitivity, and accuracy More immune to vibration problems Smaller, lighter, and more compact Torque and RPM Measurement Subsystem
43
Torque Transducer: Utilizes a system of strain gauges (Wheatstone Bridge) Uses slip rings or rotary transformers to power and transfer strain gauge data Torque and RPM Measurement Subsystem
44
Torque from Motor Constants: Ideal for direct drive systems Only requires measurement of motor current Torque and RPM Measurement Subsystem
45
Critical Criteria Measurement accuracy and sensitivity Ease of implementation Small package size Allow for multiple shaft diameters Ease of maintenance
46
Final Integrated Concept Generation
47
Final Integrated Concept Selection Physical Stand Tangential & Axial Force Measurement Shaft, Motor & Impeller Integration Torque & RPM Measurement
48
Final Integrated Concept Selection Physical Stand Sealing System
49
Preliminary Risk Assessment/FMEA https://edge.rit.edu/content/P11251/public/Design%20Documentation
50
Preliminary Risk Assessment/FMEA Key Risk Items Full range of adjustability Seal Effects measurement instrumentation & readings Sensitivity of Measurement Systems Successful Integration of Sub-Systems Orientation affects measurements
51
Project Plan Review https://edge.rit.edu/content/P11251/public/Team%20Project%20Plan
52
Questions/Comments/Concerns
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.