Half a croissant, on a plate, with a sign in front of it saying '50c'
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Failure Bearing

A Bearing designed to fail at specific rotational speeds
  [vote for,

Wind turbine speeding out of control? Or something else that spins and could spin too fast? (I'm out of example ideas). Feedback loop not working and you need an absolute final solution to a runaway rotation? A bearing built with an internal structure that ejects a low-viscosity (and possibly slowly thickening, like a 2-part epoxy) at high speeds. Like a fuse protects electronic components, a fail-bearing could protect valuable assets, slowing them down gradually and then solidifying. One idea is to have fluid-filled cylinders that are hollow, filled with thickening agent and capped with a cap that has a predetermined failure point, just like CO2 bottles or SCUBA gear.
twitch, Sep 19 2017


       // something else that spins and could spin too fast? (I'm out of example ideas). //   

       Democratic party press officers ?
8th of 7, Sep 19 2017

       A child's concept in a finger painting?
wjt, Sep 19 2017

       When bearings fail, they often lock up and blow up and break things. What you want is a clutch. Pretty old technology.
RayfordSteele, Sep 20 2017

       but how to put a clutch in a bearing?...
twitch, Sep 20 2017

       //What you want is a clutch.//   

       My first thought was a standard style clutch, excess force causes slip. The blades spin faster but the generator becomes progressively decoupled. The problem there is that the blades will spin up and self destruct, or, the clutch will quickly suffer a fricton related heat problem... quickly becoming an oxygen related fire problem. A centrifugal clutch that engages a nice robust rotary damper would be better.   

       Better still would be a centrifugal governor that feathers the blades. But then how will you sell them a new one?
bs0u0155, Sep 20 2017

       Easy - a dog-clutch, a spring, and a centrifugal governor. Spin the assembly too fast, and the governor releases the spring. Depending which way round the clutch is placed, either the drive is allowed to freewheel from the load, or it engages to a brake or fluid load to slow it.
8th of 7, Sep 20 2017

       Designing a part to do the opposite of it's intended job suggests the desired system is at fault.
wjt, Sep 21 2017

       Agreed. That's how we ended up with Republicans.
RayfordSteele, Sep 21 2017


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