Cutting Each disk is cut out of a sheet of steel using a plasma cutter. The template [made in Step 3] is clamped to the sheet of steel then the plasma cutter is run round the template cutting the disk. Grinding The edges of the discs are then ground to the right size using a bench grinder [our discs were 64mm diameter]. This also removes the burr left by the plasma cutter. The surface of the discs are also ground down using an angle grinder to remove any burr from the surface and improve the aesthetic. Bending Each disc is then clamped in the CNC template [made in Step 3] in the bench vice to bend it to the correct pitch. We then welded each disc to the central pole using a gas welder, we found from making prototypes that the gas welder gave a much cleaner finish than arc welding. This created the blades of the screw. The welding caused the central pole to warp slightly so we had to manually bend the pole back so that it was as straight as possible. This took some time! The sequel to the legendary game that captured the hearts and minds of over 100 million players is here! Warning: Paradise Island 2 is highly addictive even if you’ve never played this kind of game before. Free Online Games and More Shockwave is the ultimate destination to play games. Try our free online games, download games, flash games, and multiplayer games. Return to your tropical sanctuary in Paradise Island 2, a stimulating and FREE online sequel to the fun word game. Paradise is only a word away in this fun collection of word-construction games set in a variety of beautiful tropical themes. Paradise island android game free download apk. Design Archimedes' screw consists of a screw. The screw is turned usually by a windmill or by manual labour. As the shaft turns. With the aid of the screw, an invention of Archimedes. The purpose of this paper is to examine the optimal design of an Archimedes screw. We made supports for the screw to sit in so that it was held at one level and span it using a drill to see where the warping was, we then had to bend it by hand. Also at this stage when we tried fitting the screw in the downpipe it was too tight a fit so we had to grind down some of the blades using an angle grinder. To find out which blades needed grinding we forced the screw in the pipe and ran it off the drill, this made the screw cut the inside of the pipe and when we pulled the screw out, the blades that had lots of plastic on them, and therefore had been cutting into the pipe most, were the ones that needed ground down. Traditionally an Archimedes Screw would rotate inside the pipe while the pipe stayed stationary. However we decided, after a lot of testing, with our pump it would be more efficient if the screw was sealed inside the pipe and the pipe rotated along with it so really now it is a variation on the coil pump. The screw fits tightly into the pipe anyway but in order to make it sealed we first had to run silicon sealant [any bathroom sealant should work, we used multipurpose silicone sealant from the pound shop] round the central pole so that there were no gaps between it and the blades. We then put a generous line of sealant round the outsides of the blades and then forced the screw into the pipe and left it to dry over the weekend [we recommend leaving it for at least 24 hours]. This sealed the screw to the pipe and this way hopefully no water will run back down the pipe like it would in a traditional Archimedes Screw. The frame is a very simple 'L' shaped frame made from wood. We wanted to make it so that we could adjust the angle that the pipe sits at whilst its in the frame. ![]() Archimedes Screw Pump Design ManualTo do this we made a simple square frame that would slot into notches on the sides of the tank we'll be using. At the front of the frame are 3 notches on either side, a dowel with a bracket attached sits in a set of the notches and this can be moved, each set of notches giving a different angle. Two 'legs' come down from the back end of the square frame and this had two sets of hooks on it in which another dowel with another bracket sits in and this can alter the angle further. Diy Archimedes ScrewThe screw is held in place on the frame by a simple collar that sits over the bottom with a plate on the end that the end of the screw rests against and there is also another collar that sits before the first bracket and stops the pipe from slipping down any further holding it in place. Attachments •. At the end of this project we have a competition to see which team can move the water most efficiently and in order to regulate the pumps all the teams were given the same motor [24V]. Now this motor produces 0.1Nm of torque and the drill we were using to test our screw produces 40Nm of torque so we faced quite a challenge to get our motor to produce enough torque to turn the screw. We decided the best way to do it was to buy a cheap drill and salvage the gearbox from it. We then attached it to the motor and we estimated this increased the torque to about 20Nm. However once we'd done this we realised that by increasing the torque so much, we'd decreased the speed by too much and the screw was now going too slowly to pull up any water so we had to introduce another gear box, this time gearing it back up slightly.
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