特斯拉无叶涡轮泵制作方法

1、特斯拉无叶涡轮泵制作方法Building a Tesla Turbine from hard drive plattersPlease note that I am not a Physicist or a machinist (yet).I have been interested in Nikola Tesla for some time, andI was looking for a project to gain some experience in the machine shop. My job is to provideLecture Demonstrations ,so my

2、goal was to produce a teaching tool rather than an efficient engine.For background material, Wikipedia has several good review articles about Nikola Tesla , the Tesla Turbine , the Boundary Layer Effect , and Reynolds Number.DisksAt first I tried using CDs because of their large surface areas, but t

3、hey didnt hold up too well under the millingmachine. I also had a stack of platters from old and defective hard drives, but I didnt know if the smaller diameter disks would work as well.One problem I ran into is that some newer hard drives use ceramic disks instead of metal. Theyre still coated with

4、 metal, but theyre thinner and a couple platters shattered when I tried to machine them:My original plan for the center hole pattern had small holes (for threaded rods and washers for spacers), as well as large holes (for air vents).The second set of platters had radial arcs cut in them such that th

5、e inside edge of the radial cutout is close to the outside diameter of the spacers that I removed from the hard drive assemblies.The hard drive platters were stacked and clamped to a rotary table between two sheets of scrap aluminium but the top disk (above picture) still took some extra damage. The

6、 rest ofthe platters look much better though (see the complete rotor assembly below).SpacersI decided to be lazy and use the spacers that were between the platters in the original hard drive assemblies rather than machine my own. This increased distance (roughly .05 instead of .012) may lead to turb

7、lent flow rather than laminar flow but will be close enough for this project.ShaftWith the turbine platters and spacers complete, I turned a shaft from round stock. The inside diameter of both the platters and spacers is .98 which is the diameter of the thick section in the middle. I left the whole

8、length at .98 until I knew the width of the chamber and the inside diameter of the bearings. The wide part is long which fits insidethe 2 thick acrylic chamber.CollarsThe collars are essentially wider versions of the platter spacers. The inside diameter has to fit on the shaft, but they cant be too

9、tall so they block the ventilation holes in the disks. Also, they cant be too wide or they will take up too much horizontal space inside the chamber. I made each collar .3 which is enough space for a #10-32 set screw to hold them (and everything else) in place.BearingsThe bearings and brass fittings

10、 were the only new parts inthis project (everything else was reused from scrapmaterials). These metric bearings were pulled from a box of old and used bearings and I had to machine the shaft and side panels to fit them.Rotor AssemblyThere are eleven platters and ten spacers held together by the two

11、collars. The hard drive platters are hard to keep clean so I wore gloves when assembling the rotor. There should be a fair amount of pressure between the two collars or the disks will rotate about the shaft instead of with it.ChamberThe main chamber is an acrylic block machined down to x x 2. The sq

12、uare block was mounted in a 4-jaw lathe chuck, drilled, and then bored out. The final cutout is about .07 larger than the disks. The air inlet is taped for a 1/4 pipe thread and all of the other holes are taped for 1/4-20 socket head cap screws.Side PanelsThe side panels are .47 thick acrylic and ha

13、ve untaped .25holes for alignment to the main chamber. The center holeis .6 with a .280 deep counterbore for the bearing. The bearings are metric so I used the 4-jaw chuck and boring bar again to try for a press fit into the side panel. However,I madet he counterbore a few thousandths too big which allows the bearing to rotate in the side panel.Many other Tesla Turbines that Ive seen online have larger ventilation holes in the sides. I was going to cut the same radial pattern from the disks in the side panels, but I decided that wasnt necessary after a tr