Inquiry (采购产品): Light Wind Generators need gear/pulley Hi, I am a high school science teacher living in Vermont and really need some advice. My students and I have been building a very light wind generator. We have assembled the windmill already. Our plan is to use several small DC generators (toy motors) purchased at our local Radio Shack to work off from a drive pulley directly attached to our windmill hub. I'm figuring we need 4 spur gears or pulleys fitted with an 1/2 to 1" (pitch diameter) that will need to slide onto our motor shafts (1/16") with keyway and set screws fasteners. In order to generate sufficient RPM's to induce a current from our motors (up to a 12,500 rpm rating), it is anticipated that we will need a 16:1 ratio (assuming hub rpm's are between 125 and 250 rpm's) between the pitch diameter of the drive attached on the hub and the spurs attached to the motor on seperate pillow mounts. Therefore the drive gear/pulley will need to have at least a 16-inch pitch diameter and preferably have an open spoke design.) So far, our efforts to find these parts already fabricated has been futile. During a brain storming session, one student asked if we could possibly use clock gears? That she has observed gears from an old clock having many teeth on it and built from strong yellow colored metal. Sounded like a great idea to me, however these are rare and expensive items to find. I am betting that we could use very lightweight and low friction pulleys using wound steel (fishing line) string or iron thread string or perhaps even a reinforced curtain cord as the belt. I'm hoping to use an old bicycle rim for a mounting frame for the motor's pillow mounts holding its gear/pulley assembly to properly align with the drive gear/pulley asembly attached to the moving hub of the windmill. I am quite certain our simple little machine can generate sufficient electricity to power some light load devices and demonstrate wind driven technology to the kids. If you could help us with our project, we would greatly appreciate your assistance. email: ckenyon@ncssinc.org Chris Kenyon, Science teacher Project Soar High School McGinn Avenue St. Albans Bay, VT 05478 **** Hidden Message ***** Chris Kenyon McGinn Ave St. Albans, VT 05478 USA Company: Project Soar Title: teacher E-mail: ckenyon@ncssinc.org **** Hidden Message ***** ckenyon@ncssinc.org
