I tried OVERPOWERING my Vacuum! (Homemade Turbine)
video description
I have been tried to develop a new propeller for vacuum cleaner in 3D printed way in my previous job, your workflow is basically the same as mine and represented very clear. Great video.
But I will not recommend you continue use this diy vacuum cleaner because the propellers 3D printed tends to have structural weakness and will warp after stress test/ heavy usage.
It hugely depends on your printing profile. But if the propeller stuck while you using it, best scenario is BLDC motor protection circuit come up and stop further damage. Worst scenario is potential fire hazard due to motor continues to heat up and smoke come out.
I learn it in a hard way blown up a couple of motors in a controlled environment. It is a bad idea to put it in your house.
Date: 2023-05-28
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Comments and reviews: 14
Chris
Increase the surface area of the impeller. The airflow of an impeller is defined by the speed (as you pointed out) and its surface area. By increasing the number of fins or by increasing its size overall, you can increase the airflow quite considerably. In my last blower project, I needed a 150% increase in airflow. This was just about manageable without changing the motor by increasing the impeller size by 30%. At that point, the torque of the motor reached its limit. Bear in mind though that higher torque generates more heat. You can temper PLA and ABS (and almost all plastics) in a home oven to greatly increase its tolerance to heat, although it will result in shrinkage. The Formfutura Volcano PLA filament is a good option here, too, as it allows you to temper the parts with minimal shrinkage.
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Increase the surface area of the impeller. The airflow of an impeller is defined by the speed (as you pointed out) and its surface area. By increasing the number of fins or by increasing its size overall, you can increase the airflow quite considerably. In my last blower project, I needed a 150% increase in airflow. This was just about manageable without changing the motor by increasing the impeller size by 30%. At that point, the torque of the motor reached its limit. Bear in mind though that higher torque generates more heat. You can temper PLA and ABS (and almost all plastics) in a home oven to greatly increase its tolerance to heat, although it will result in shrinkage. The Formfutura Volcano PLA filament is a good option here, too, as it allows you to temper the parts with minimal shrinkage.
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Daniel
You can't design a centrifugal compressor by just putting some curved blades on a hub and hoping for the best. You need to calculate the pressure drop and design rotor speed, then with input power you can calculate the mass flow rate and therefore radial velocity, then tangential velocities and thus draw the velocity triangles to calculate the exact angle the blades need to be at the inlet and outlet sides of the rotor, taking care not to over expand the flow which will induce separation and high losses. You can then solve some differential equations to get the exact curve the blades need to follow for uniform pressure distribution, and plug all this into your CAD program.
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You can't design a centrifugal compressor by just putting some curved blades on a hub and hoping for the best. You need to calculate the pressure drop and design rotor speed, then with input power you can calculate the mass flow rate and therefore radial velocity, then tangential velocities and thus draw the velocity triangles to calculate the exact angle the blades need to be at the inlet and outlet sides of the rotor, taking care not to over expand the flow which will induce separation and high losses. You can then solve some differential equations to get the exact curve the blades need to follow for uniform pressure distribution, and plug all this into your CAD program.
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Christian
I've been very curious about power tool battery packs and chargers. They are typically 5 cell lithium packs, and each lithium cell could go up to 4. 2 volts for a total voltage of 21 volts. However most chargers and packs I've seen only go up to 20 volts or 4 volts per cell. They most likely do this for an increased safety and lifespan of the cells, but also because they are designed as fast chargers. I've been wondering if the chargers could be modified to go up to 21 volts or if it would be better to design a slow or regular speed charger so the packs could have a longer run time. This could be a good DIY or buy episode.
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I've been very curious about power tool battery packs and chargers. They are typically 5 cell lithium packs, and each lithium cell could go up to 4. 2 volts for a total voltage of 21 volts. However most chargers and packs I've seen only go up to 20 volts or 4 volts per cell. They most likely do this for an increased safety and lifespan of the cells, but also because they are designed as fast chargers. I've been wondering if the chargers could be modified to go up to 21 volts or if it would be better to design a slow or regular speed charger so the packs could have a longer run time. This could be a good DIY or buy episode.
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FICK
E Waste: it is weird that we have through the internet so much access to knowledge but people apparently have even lesser interrests in learning various DiY stuff (and e. g. philosophy & etc) and that they aren't motivated by society and the goverments. Hell, they could even make some money on the side and the Gov would even profit indirectly. I had this spark of idea and I started learning various things. Nowadays, when e. g. the port or button of a device is damaged, I couldn't imagine to not trying to fix it and I look in disbelief to those who throw this away (some reps can be dangerous however like a charged capacitor)
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E Waste: it is weird that we have through the internet so much access to knowledge but people apparently have even lesser interrests in learning various DiY stuff (and e. g. philosophy & etc) and that they aren't motivated by society and the goverments. Hell, they could even make some money on the side and the Gov would even profit indirectly. I had this spark of idea and I started learning various things. Nowadays, when e. g. the port or button of a device is damaged, I couldn't imagine to not trying to fix it and I look in disbelief to those who throw this away (some reps can be dangerous however like a charged capacitor)
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Mike
Those hand hold vacuums are for vehicles and they always suck. not literally, they are horrible! POS. To clean my house with that, it would take a freaking week, lol. My Samsung AI+ vacuum does the daily upkeep with two charges (3300 Sqft House) and weekly deep vacuum with the Dyson upright to get everywhere else with three dogs and living in the desert, it gets dirty quick.
That is freaking awesome you were able to reuse the casing of the vacuum and rebuild the entire interior with your own design.
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Those hand hold vacuums are for vehicles and they always suck. not literally, they are horrible! POS. To clean my house with that, it would take a freaking week, lol. My Samsung AI+ vacuum does the daily upkeep with two charges (3300 Sqft House) and weekly deep vacuum with the Dyson upright to get everywhere else with three dogs and living in the desert, it gets dirty quick.
That is freaking awesome you were able to reuse the casing of the vacuum and rebuild the entire interior with your own design.
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JimiDJ
For me it was a success, but the point was the girl to be satisfied and since she is the head of the house the whole mission was a failure xD. Anyway, i generally love 3D printing but having to reprint and reprint and reprint big parts just for adjustments not only wastes plastic but also is bad for the environment. and don't tell me about recycling plz. it's a joke. Overall the project was a good idea and i believe it would really worth if you had that better motor in hand.
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For me it was a success, but the point was the girl to be satisfied and since she is the head of the house the whole mission was a failure xD. Anyway, i generally love 3D printing but having to reprint and reprint and reprint big parts just for adjustments not only wastes plastic but also is bad for the environment. and don't tell me about recycling plz. it's a joke. Overall the project was a good idea and i believe it would really worth if you had that better motor in hand.
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Lucas
Greetings! what do you think about the pet bottle filament? i've seen this a bit and i think its a better solution than keep buying filaments for 3d printing. besides it have an especific equipment to make it, i saw crazy ideas to make the filament: even a old cheap hot glue gun could do the job. i hope you come with this idea and show your thoughts about it. tons of pet bottles are wasted nowdays and its pretty easy to find them.
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Greetings! what do you think about the pet bottle filament? i've seen this a bit and i think its a better solution than keep buying filaments for 3d printing. besides it have an especific equipment to make it, i saw crazy ideas to make the filament: even a old cheap hot glue gun could do the job. i hope you come with this idea and show your thoughts about it. tons of pet bottles are wasted nowdays and its pretty easy to find them.
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Jonathan
I've been wondering about doing this but with replacing the large DC blower motor in my suzuki samurai's climate control and with a brushless motor setup and a 3d printed fan design with stronger air flow but I have no idea what kind of motor i'd use that get along with automotive voltages of 12. 4-13. 7v reliably and also handle ambiet temps in the summers of over 115f.
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I've been wondering about doing this but with replacing the large DC blower motor in my suzuki samurai's climate control and with a brushless motor setup and a 3d printed fan design with stronger air flow but I have no idea what kind of motor i'd use that get along with automotive voltages of 12. 4-13. 7v reliably and also handle ambiet temps in the summers of over 115f.
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education
Turbines have to be especially well balanced with special tools. Solution. Dyson hair dryers are way over engineered. Copy their design as it doesn't get any better than that except perhaps use a Dyson vacuum turbine as a template as I suppose there's a significant difference in design. They are expensive because the design is way better than the competition. Gl!
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Turbines have to be especially well balanced with special tools. Solution. Dyson hair dryers are way over engineered. Copy their design as it doesn't get any better than that except perhaps use a Dyson vacuum turbine as a template as I suppose there's a significant difference in design. They are expensive because the design is way better than the competition. Gl!
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Alex
Are you sure you couldn't optimise the vents through which the air exits the impeller? They look a bit 'square' and might cause back pressure.
Also, looking at the impeller in my old Roomba 565, longer vanes at the outer circumference might impart more flinging force to the air as it leaves. This might necessitate a different ramp to help create the shape.
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Are you sure you couldn't optimise the vents through which the air exits the impeller? They look a bit 'square' and might cause back pressure.
Also, looking at the impeller in my old Roomba 565, longer vanes at the outer circumference might impart more flinging force to the air as it leaves. This might necessitate a different ramp to help create the shape.
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Mike
Fun bit of experimenting. But I'd point out that most centrifugal blowers/pumps have a flow vs 'head' trade off. If you design a rotor for maximum flow rates, it probably will not develop much differential pressure. And vice versa. The differential pressure can be important when you think about how you need to draw the air through a dusty filter bag.
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Fun bit of experimenting. But I'd point out that most centrifugal blowers/pumps have a flow vs 'head' trade off. If you design a rotor for maximum flow rates, it probably will not develop much differential pressure. And vice versa. The differential pressure can be important when you think about how you need to draw the air through a dusty filter bag.
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john
very good design for a not mechanical engineer youll get it to work even better i know it. a word of advise from a happily married man of 20 yrs when the wife/gf says they want a new appliance its best to just nod say yes dear and go get her what she wants. and then you get to tinker and mess with the old one til your hearts content.
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very good design for a not mechanical engineer youll get it to work even better i know it. a word of advise from a happily married man of 20 yrs when the wife/gf says they want a new appliance its best to just nod say yes dear and go get her what she wants. and then you get to tinker and mess with the old one til your hearts content.
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David
Great Scott thank you for another great video! What we learn from failures and suboptimal outcomes are often more important than what we learn from our successes. I really enjoyed watching what you learned from each iteration. I also loved the premise of the project which was essentially I don't have to do this, I just want to.
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Great Scott thank you for another great video! What we learn from failures and suboptimal outcomes are often more important than what we learn from our successes. I really enjoyed watching what you learned from each iteration. I also loved the premise of the project which was essentially I don't have to do this, I just want to.
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MARKYS
Fantastic work!
I don't know if it would be possible, but it could be even more efficient with a proper turbocharger: D Jokes aside, if the exhaust air would be used to spin the turbine even faster like it is on a real turbocharger on an engine, it should be even faster, at least in my mind it could work: D
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Fantastic work!
I don't know if it would be possible, but it could be even more efficient with a proper turbocharger: D Jokes aside, if the exhaust air would be used to spin the turbine even faster like it is on a real turbocharger on an engine, it should be even faster, at least in my mind it could work: D
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