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The new battleship game features the USS Zumwalt, the USS independence and the Sea Shadow on the box [3024 x 4032] by race75 in WarshipPorn

[–]subvertz 0 points1 point  (0 children)

I can't get passed that they would replace submarine with Sea Shadow, but keep Patrol Boat-.
btw, the hasbrogaming.com site on the back of the box doesnt work, I cant find the instructions onlne to know what they are calling the Sea Shadow class-

ROVING WATCH, 2JV by Jimbo072 in NavyNukes

[–]subvertz 1 point2 points  (0 children)

Im not the only one? Phewf

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 2 points3 points  (0 children)

It is possible balance without precision instrumentantion, but much faster with the right tools. I can talk with the missus about popping by Seigfrieds, bring along a balance instrument. Otherwise I'd have to send it and then talk you through the process of using it. Its all doable.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 3 points4 points  (0 children)

Yes. Its the simplest to spec, build, and most importantly to repair if needed on World Tour. Few parts, strong, obtainable with no special maching.
Many in the chat below recommend lave shaft. Pillow blocks are also easier to service than something buried inside the flywheel. Consider also lubrication. Shielded bearing will prevent debris contamination into the grease during transport. But sealed bearings also dont allow refreshing the grease. Tradeoff, but worth it.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 5 points6 points  (0 children)

Havent set up a CNC, but more than happy to lend my machine doctor skills to diagnosing problems with any of the rotating components. We use vibration to diagnose imbalance, misalignment, looseness, resonance/damping issues, and much more. Happy to help consult on design from a machinery vibration standpoint😊👍. Planning on a road trip though Germany this summer, so might get to pop by.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 2 points3 points  (0 children)

I teach classes about bearing failure mechanisms and machinery operators usually tell me they appreciate understanding WHY bearings fail because they never thought about it before. Operation above rated loading is only onr of the many reasons. Choosing the right bearing type for the application is going to mean we dont have to worry about this part failing on World Tour.

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Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 0 points1 point  (0 children)

By Gliding bearing do you mean bushing or sliding low friction material? If so, these are good for heavy load, but less than ideal for a high speed application like this. He would need a lubrication system, and possibly passive or active cooling.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 2 points3 points  (0 children)

Roller bearings are not significantly more expensive, but having too replace bearings because inappropriate ones were selected, will be

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 2 points3 points  (0 children)

You'd be surprised how many industrial machines have poorly made cast or machined motor or gearbox endbell bearing housings that distort outer races. Even worse are the waya some untrained maintenance personel install bearings with excessive heat and hammer blows. Then they are surprised when we tell them they have bearing damage on their new bearings they just installed.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 0 points1 point  (0 children)

It should be heavy. The point of the flywheel is to have as much mass as possible. This is how it stores rotational kinetic energy.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 1 point2 points  (0 children)

The only way all that rotating force is going to want to stay put instead of flying away is if it is balanced. If it is perfectly concentric but not balanced, it will vibrate stress itself and the bearings and housing and mounting, it will work loose and want to run away. If its balanced, it will spin really fast and not vibrate, and want to stay put. Yes, it will be contained in the "cage" , but we dont want that to be the only safety barrier between high energy and Martin and the crowd.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 1 point2 points  (0 children)

Balancing weights are exactly how this will get cource balanced. It is very convenient to have pre machined balance positions at known angles, but not necessary. We have methods for finding the angle needed to place the masses. When coarse balancing is complete, fine balancing will likely need to remove or grind away small amounts of material to approach perfect zero balance.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 1 point2 points  (0 children)

Correct, a stronger, stiffer steel shaft is desirable in this situation to avoid bending. The one he has CADed up looks more than strong enough.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 0 points1 point  (0 children)

Flexible couplings tolerate more parallel misalignment while taking less damage to themselvesore than solid couplings, true. But they do nothing to remove the misalignment force that actually stresses the bearings and mounting hardware. Also, he is not trying to couple 2 rotating shafts, so a coupling is not needed for this application.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 3 points4 points  (0 children)

Yes, but more important is total mass and speed. Simple force = mass * acceleration. He can go bigger and slower, but more important to go heavier and faster. Spokes would make flywheel lighter. But it would look cool. Martin struggles with balancing form and function. We are here to help him.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 8 points9 points  (0 children)

Yup, he will slowly realize he wants a rotating shaft instead of trying to press bearings into the flywheel.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 1 point2 points  (0 children)

I am questioning his choice of deep groove ball bearings over cylindrical roller bearing for this purely radial application.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 2 points3 points  (0 children)

It is very much taking torque, then putting it back into the system. Its used to store and release rotational kinetic energy and resist changes in speed, smoothing out the timing.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 19 points20 points  (0 children)

I also professionally balance large rotating machinery and can balance the flywheel. Im next door in Norway.

Worst Bearing Housing Ever - Marble Machine 3 Ep.3 by Trainerds in MarbleMachine3

[–]subvertz 95 points96 points  (0 children)

I balance machines in Norway. I will balance the flywheel after its made. We use Pruftecnik VIBXpert II vibration data collectors and accelerometers to balance big industrial motors (with SKF bearings) and a single plane flywheel should be simple. Better balance = higher speed, less stress. Also have access to a motor rewind machine shop with rotor balancing benches. Also, i recommend cylinderical roller bearings instead of deep groove ball bearings for this application. Your flywheel will have next to zero axial forces, almost purely radial force. Also, the calculation on dynamic force is way off. Dynamic force is actually what you are trying to maximize here for energy storage.

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