If you go to a dealer that handles power transmission items, such as belts, cog belts, High Tension belts, cog belts pulleys, chain drives, taper locks, and etc. They can bring up a computer drawing of the correct belt type and belt contact angles rated for the rpm torque and HP.
They did this for me and was subjected for my installation, is to have a opposing belt in the opposite direction of each other or a continuous belt place on 3 or 4 pulleys 60 to 90 degrees of each other to reduce the bearing load of the drive unit. Also there is a certain amount of belt contact to the pulley surfaces, to maintain the torque and horsepower needed. I install this system in 1980 and still running it today even with the same industrial power belts. Roland ----- Original Message ----- From: Ben Goren via EV<mailto:ev@lists.evdl.org> To: Roger Stockton<mailto:rstock...@delta-q.com> ; Electric Vehicle Discussion List<mailto:ev@lists.evdl.org> Sent: Wednesday, August 06, 2014 4:23 PM Subject: Re: [EVDL] Hybrid Mustang: motorcycle drivetrain? On Aug 6, 2014, at 1:25 PM, Roger Stockton via EV <ev@lists.evdl.org<mailto:ev@lists.evdl.org>> wrote: > I believe you are mistaken. I think what you need to consider is termed "overhung load"; this Gates document gives a good overview: Roger, thanks for that excellent resource. Obviously, I'm not an ME...but I'm sure getting a crash course in a tiny subset of the field. The document suggests that reducing belt width, increasing pulley diameter (even while keeping gear ratios constant between the two pulleys), and moving the belt closer to the bearing all reduce overhung load. Since I'm starting from scratch with this, I should have no trouble optimizing all three if need be. In particular, it looks like it shouldn't be any trouble getting the pulleys practically right on top of the bearing. The document also ends with a sidebar saying they've got belts with the same geometries as chains that also have the same load ratings with better life and maintenance. I'm thinking it'd be a good idea to see if I can't find somebody at Gates to help me run some numbers and suggest part specifications. I'd almost undoubtedly use their belts (I just replaced the disintegrating fan belt on the Mustang with a Gates belt). I'm not sure that they also make pulleys...but, if they do, that'd be the obvious choice rather than some other manufacturer or a machine shop. b& -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: Message signed with OpenPGP using GPGMail URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140806/6bea57e6/attachment.pgp<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140806/6bea57e6/attachment.pgp>> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA>) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140806/6a7295cd/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
