Solvay/ Torlon Thrust Bearing Discussion Torlon Versus Vespel Brian Stern

Size: px

Start display at page:

Download "Solvay/ Torlon Thrust Bearing Discussion Torlon Versus Vespel Brian Stern"

Amanda Parrish
5 years ago
Views:

1 Solvay/ Torlon Thrust Bearing Discussion Torlon Versus Vespel Brian Stern

2 Agenda Torlon Commercial Applications Thrust Bearing Requirements Torlon Property Discussion Torlon Friction and Wear Testing Dry and Lubricated Torlon versus Vespel Application Requirements 2

3 Commercial Torlon Applications Transportation 3

Axial Thrust Bearings Requirements Wear resistance in lubricated and non-lubricated environments Impact and compressive strength Dimensional stability

4 Axial Thrust Bearings Requirements Wear resistance in lubricated and non-lubricated environments Impact and compressive strength Dimensional stability Non-seizing vs. metal Grades 4645, 4301, 4275, 4203, KT- 820SL30, KT880FW30 Competitive Materials Axial Needle Bearing PEEK, Vespel DU - Metal/polymer (PTFE) 4

5 Commercial Thrust Bearing Applications 5

6 Needle Bearing Replacement Axial Thrust Bearing 6

7 Planetary Gear Set Planetary Gear System Spur Gear no Axial thrust Helical Gear Axial thrust 7

8 FRICTION AND WEAR DEFINE REQUIREMENTS What is the application (seal ring, thrust washer, thrust bearing, Journal bearing)? What are the temperature requirements? What is the chemical environment? What is the counter surface Is the application lubricated or Dry? What pressure (psi) and velocity (FT/min)? Is COF important (Static or Dynamic)? How is lubrication provided and what is the viscosity? What is the incumbent material/product? Recommended Polymer? 8

9 Polyamide-imide Introduction Torlon PAI Resins Exceptional strength and stiffness up to 275 C Outstanding wear resistance Excellent chemical resistance to automotive fluids Inherent flame resistance Low CLTE 9

10 Torlon Mechanical Performance at High Temperatures Semi-Crystalline Behavior Amorphous Behavior PEEK PEI TPI PAI Torlon retains exceptional mechanical properties up to its Glass Transition Temp (276 C) 10

11 Mechanical Properties of Torlon versus PEEK 11

12 Torlon FW Grades Grade Description Formulation 4203L NOT Recommended for FW but maybe used in some lubricated apps NO FILLER 4301 Exceptional Wear Dry high P and Mod V Very good Wear Lubricated Graphite/PTFE 4275 Exceptional Wear Dry Graphite/PTFE 4630 Exceptional Wear Dry.high V low P 4435 Exceptional Wear Dry.high V low P 4645 Exceptional Wear Lubricated concern about Counter Surface Graphite/PTFE Proprietary CF/PTFE 12

13 Friction and Wear Refresher ASTM D3702 Standard D3702 Standard test specimen geometry or small thrustwasher nominal diameter of 1.12 D3702 Standard counterface condition 1018 steel with consistent surface roughness Wear Rate PV Limit Wear Rate = in/hr K = Wear Factor K = Wear Rate (in/hr) P*V Drawback with small thrustwasher: Maximum velocity is 2000 ft/min Needle bearing application calls for velocity of over 3000 ft/min Need larger thrustwasher configuration 2 nominal diameter P V 2πr = circumference Increase diameter of specimen for higher velocities 13

14 FALEX MULTI SPECIMEN TESTER Results: Temperature, COF and Wear Rate Determine PV limit Lubricated and Dry Testing Capability 1018 mild cold rolled steel Ra micro-inches 14

15 Mechanical Properties of Torlon FW Grades properties Tensile strength, Ksi Tensile modulus, Msi Tensile elongation, % Flex strength, Ksi Flex modulus, Msi Compressive strength, Ksi Shear strength, Ksi Not available Izod Impact, Notched, ft-lb/in Izod Impact, Unnotched, ft-lb/in CLTE, ppm/ o C Thermal conductivity, W/m-K Graphite/PTFE Additives influence Mechanical Properties 15

16 Wear Factors for Torlon Grades in Dry Environments 40 Hr Testing WF COF Torque Temp WF COF Torque Temp WF COF Torque Temp V PV (psifpmlb-hr lb-in x10-10 in 3 min/ft- x10-10 in 3 min/ft- P (psi) (fpm) C lb-hr lb-in x10-10 in 3 min/ftlb-hr lb-in C o C Define Acceptable Level of Wear (microns??) Typically WF <<

Axial Thrust/Needle Bearing Requirements Drag Torque Coefficient versus Metal High temperature capability (>160C) Knit Line Strength Stack up tolerance (thickness) Chemical resistance Dimensional

17 Axial Thrust/Needle Bearing Requirements Drag Torque Coefficient versus Metal High temperature capability (>160C) Knit Line Strength Stack up tolerance (thickness) Chemical resistance Dimensional stability Flatness ( Wear-in ) Compression strength (thrust washers and bushings) Noise, Vibration, Harshness reduction (NVH) Weight reduction Cost What are the F&W properties of Torlon at moderate load/high speed in a lubricated environment and how do we get there? 17

18 NSK CVT Transmission from Shanghai Auto Show 18

19 Lubricated Wear Boundary Lubrication Mixed Film Lubrication Fluid Film Lubrication Wear Rate Z = Viscosity N = Rotational Speed P = Load ZN P Start / Stop, Low / Medium RPM Reciprocating Motion High Load / Starved Lubrication High RPM / Low Load Motion ZN 3 cp rpm 10 Pa s *(1/ 60)(1/ s) Pa s s x ) 9 (1/ * P psi 6.89x1000Pa Pa 19

Large baffled chamber designed for forced oil recirculation with less foaming Delivers fresh oil at

20 FALEX MULTI SPECIMEN TESTER WITH FORCED OIL RECIRCULATION FOR LUBRICATED TESTING Gear Pump and Oil Reservoir Multi- Specimen Tester with Large Baffled Chamber Data Acquisition System Heater/Chiller Large baffled chamber designed for forced oil recirculation with less foaming Delivers fresh oil at adjustable flow rate across test surface Cools specimen by dissipating heat generated at test surface 20

Oil Flow for Recirculation System and Oil Groove Design Oil Flows into Stationary Counter Surface Holder Oil Flows into ID of Steel or Counter Surface

21 Oil Flow for Recirculation System and Oil Groove Design Oil Flows into Stationary Counter Surface Holder Oil Flows into ID of Steel or Counter Surface Washer Oil Flows Out from ID to OD of Test Specimen Through the Oil Grooves Centrifugal Force Distributes Oil for Lift Design for Cooling or Lift or Lubrication 21

4275 Lubricated FW @ 500K PV Virgin Torlon 4275, 2"Disc, 26 Grooves, 300 Micron Deep x 1 mm Wide in Dexron 3 ATF at 0.20 lpm, 90 C, 1770 V, 283 P, 500 K PV Temperature, C 200 180 9.

22 4275 Lubricated 500K PV Virgin Torlon 4275, 2"Disc, 26 Grooves, 300 Micron Deep x 1 mm Wide in Dexron 3 ATF at 0.20 lpm, 90 C, 1770 V, 283 P, 500 K PV Temperature, C microns w ear = 3.4 microns w ear = 3.7 microns 2.5 microns Chamber Temp, C 60 Spec Temp, C Time, hrs Sample after 100 hours 22

23 4275 FW in Lubricated Environment (V vs P) Wear After 100 Hours Wear After 100 Hours Velocity, ft/min Velocity, ft/min Pressure, psi Pressure, psi 23

24 Commercial Thrust Bearing Applications 24

25 Product Line (All) Additive Package (All) Torsional DMA of Various SAPL Products 1.00E+10 DMA G' (GPa) vs. Temperature (C) 1.00E+09 G' (GPa) Products 4301 Vespel SP E E Temperature ( C) To our actual knowledge, the information contained herein is accurate as of the date of this document. However, neither Solvay Advanced Polymers, LLC nor any of its affiliates makes any warranty, express or implied, including merchantability or fitness for use, or accepts any liability in connection with this information or its use. Only products designated as part of the Solviva family of biomaterials may be considered as candidates for implantable medical devices; Solvay Advanced Polymers does not allow or support the use of any other products in any implant applications. This information is for use by technically skilled persons at their own discretion and risk and does not relate to the use of this product in combination with any other substance or any other process. This is not a license under any patent or other proprietary right. The use of this product resides on the determination of the customer not Solvay Advanced Polymers. The customer must determine suitability of any information or material for any contemplated use, the manner of use and whether any patents are infringed. This information gives typical properties only and is not to be used for specification purposes. Solvay Advanced Polymers Temp (graph) reserves the right to make additions deletions or modifications to the information at anytime without prior notification

26 Polymer Torlon Vespel Chemical Structure PAI PI Tg/HDT (C) 275 >330 Mechanicals High Moderate Processing Shapes Injection & Extrusion Curing Complex via Molding Compaction Sintering Near Net + machining

27 Mechanical Property Comparison Torlon vs Vespel Property Torlon 4275 Vespel SP-21 Tensile Strength (kpsi) (D1708) Tensile Elongation (%) (D1708) Flex Strength (kpsi) (D790) Compressive Strength (Kpsi) FW (dry and lubricated, P and V) Equivalent at PV defined (high V, modp) CLTE Equivalent at PV defined (high V, modp)

28 28

29 FRICTION AND WEAR DEFINE REQUIREMENTS What is the application (seal ring, thrust washer, thrust bearing, Journal bearing)? What are the temperature requirements? What is the chemical environment? What is the counter surface Is the application lubricated or Dry? What pressure (psi) and velocity (FT/min)? Is COF important (Static or Dynamic)? How is lubrication provided and what is the viscosity? What is the incumbent material/product? Recommended Polymer? 29

Science of Friction. DuPont Market Driven Innovation: Volker Plehn. Director Development & Sales. DuPont Kalrez & Vespel

Science of Friction. DuPont Market Driven Innovation: Volker Plehn. Director Development & Sales. DuPont Kalrez & Vespel DuPont Market Driven Innovation: Science of Friction Volker Plehn Director Development & Sales DuPont Kalrez & Vespel Science of Friction Increased Importance of Friction Friction from a Polymer Point