RASSOR Scroll Drum

grabcad

This Drum is engineered with a continuous cut/shear to minimize vibration and torque reaction within the low gravity environment. At maximum depth, which is 1/2 the drum diameter, the cut width is precisely 175mm. This design can be constructed using Carbon Fiber, Aluminum or magnesium, or through Additive manufacturing. Key specifications include: OD: 450mm Overall Width: 360mm Cutting Width: 175mm or less, depending on the depth of the drum Cutting Edges: 1 Cut Depth: Approximately up to 25mm Mass: Carbon Fiber/Titanium: 1.673kg Aluminum: 3.1kg Magnesium: 2.23kg Capacity (noting an allowance for a central drive shaft): Refer to images for estimated volumes. Internal Volume (theoretical maximum): 44.6 liters Inner Space Volume (empty chutes): 43 Liters Estimated Achievable Volume: 42L (based on simulation) Fill Ratio: 90-95% of theoretical Materials used include: Carbon Fiber/Titanium T6 Magnesium or T6 Aluminum Anodized for wear resistance Teeth: Titanium, Carbide, Cast Ceramic or Hardened Steel, Machined or Cast, Riveted to Shell (Aluminum rivets) with TiN coating for reduced wear. Construction details are as follows: Sides and Shell: Bonded, Welded Scoop and Shell: Bonded, Welded Scoop and Teeth: Riveted Design Features: The design does not require continuous rotation to maintain load, allowing for lower energy usage. The scroll cut allows for constant engagement with the medium, reducing vibration etc., especially in low gravity environments. The scroll design enables larger debris to be pushed or rolled off to one side, reducing potential blockage of intake. This design facilitates smoother intake of material compared to traditional scoops. Welded Construction: Removes the need for internal structures, maximizing storage and minimizing potential build-up and blockages. Offset design: Self-regulating depth of cut Single cutting edges: Increase available shearing force Scroll shape of blade increases blade life as blade wear will be spread along edge progressively over time. Radiused cutting edge: Reduces digging in, using a shearing action to remove material rather than breaking or digging, reducing the chance of grabbing. Manufacture: Manufacturing methods are common and well-known. Components can be assembled quickly and simply.