|
|
|
Section 6: Duplication of Operating Conditions with Universal Load Testers |
|
2) Understanding Contact Pattern and Gear Displacement 3) Conventional Methods for Contact Pattern Development 4) A New Method for Contact Pattern Development 5) Developing the Contact Pattern Through Computer Modeling: 6) Duplication of Operating Conditions with Universal Load Testers A Case Study of the PW6000 Project 8) Troubleshooting and Failure Analysis 9) Contact Arrow's Design Engineering Team
|
As a supplement to the theoretical calculations which are performed to achieve the design of contact patterns, Arrow utilizes Universal Load Testers which are used to simulate the performance of the gears in a gearbox (FIG. 13). With these testers, engineers can control the load and the rpm on a gear set as it runs in mesh - thus allowing for duplicating the load and the displacements that would occur in actual operation. These testers first allow the engineers to view the contact pattern as you typically would in a Gleason tester during the gear manufacturing stage. In FIG. 14 you can see the pattern that resulted from no more than a few inch pounds of torque - and the contact pattern is a localized central toe location. In FIG. 15, the tester has applied 120 inch pounds of gear torque as well as the gear displacements. You can see that the contact pattern has moved from a central toe location to a heel location and has grown in size and its shape has changed. The ability of these testers to monitor the movement of the contact pattern can be a valuable aid in the manufacture of the gears as well as for checking their actual performance without requiring them to be installed in a gearbox. There is another substantial benefit of these testers. Often, the customer is unable to determine what their gearbox deflections will be. If this is the case, the engineer can - in essence - back into the deflection values required for TCA and finite element analysis. This is performed in this way. Using the operating torque, and the wear pattern from a gear set which has been run in a gearbox, the engineer can duplicate the same wear pattern by adding displacement and load. This will generate all the numerical values required for further evaluation. |
|
Section 6: Duplication of Operating Conditions with Universal Load Testers |
|
© 2003, Arrow Gear Company All rights reserved. Unauthorized use of content is prohibited www.arrowgear.com |
Home | Company Overview | Gear Manufacturing Capabilities | Products
Publications | Multimedia | Downloads | Employment | Contact | Policies | Sitemap
