GrabCAD 模型信息
NASA RASSOR Drum Design · 模型 255814
NOTE: ALL SIMULATIONS WERE SIMULATED IN LUNAR GRAVITY AND 20RPM, BUT HAVE BEEN SPED UP 2X FOR ANIMATION PURPOSES Specifications of my design: Up to 37L fill volume 94% fill ratio 4.98kg with carbon fiber Fills up in 4-5 rotations, or 12 - 15 seconds (3.08 ~ 2.46 L/sec) Maximum width of scoops engaged will be under 175mm as long as the drum remains half or less immersed in regolith. In my entry for the NASA RASSOR bucket drum design challenge, I aimed to accomplish the following goals through my design: 1. Simplicity (durability, and ease of assembly) 2. High fill volume and ratio 3. Fast pickup process 4. Minimal spillage during holding 5. Fast unloading process To tackle simplicity, my first decision was to eliminate all moving parts inside my project. Since the bucket drums will be working far away from earth and any maintenance, they can't be too complicated mechanically. I therefore tried to design my idea so that it would be able to be built on as few pieces as possible (See 5th rendering). In the case of the spikes, I designed it so that it was one piece with the main body, and added aluminum caps to it that would further increase the durability of the model. (See 6th rendering). My design is also modular, the drum itself is divided into 4 congruent pieces that are put together. Simplicity also tied in strongly with the fill volume and ratio, as simple designs without many complicated parts will most likely have a larger area dedicated to storing the picked up regolith. I tried to increase the fill volume as much as possible, by decreasing the baffle size, and hollowing out as many different places that I could. When it came to a faster pickup process, it was a bit of a dilemma because, with larger scoops it would be possible to dig faster, but if the drum was to empty also at a fast rate, the exit had to also be large. This meant that the drum would loose a lot of regolith during the holding process. I did not want to resort to smaller scoops, because of how small scoops are required to be placed all along the drum exterior, which will lead to spills during holding for the scoops pointed downwards. Finally, my solution was to include very large scoops (half of the diameter of the drum) and arrange them within 45 degrees on the drum exterior. This allows them to dig faster, while maintain extremely low spill rates when holding if the scoops are angled up. To make the unloading process faster, I made sure that the way out was not a bottle...
- 格式
- Other、Rendering、STEP / IGES、STL
- 分类
- 3D printing、Industrial design、Machine design
- 标签
- nasadrumchallenge
- 数据更新
- 2026-09-10T12:40:01Z