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can spring be able to resist against pressure of start-up?

 
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douglasye



Joined: 07 Nov 2006
Posts: 6

PostPosted: Thu Nov 09, 2006 1:43 am    Post subject: can spring be able to resist against pressure of start-up? Reply with quote

When a rotary engine begin to start up, especially a turbo one, the force of spring under the apex seal must larger than the pressure acting on the arc of the apex seal. But what happens if the force of spring is insufficient?
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Jingyee
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Joined: 11 Jul 2005
Posts: 103
Location: Portland, OR

PostPosted: Tue Nov 14, 2006 1:25 am    Post subject: Reply with quote

Well if the spring wasn't strong enough the motor would loose its compression and not really run properly. You'd want to replace the apex seal springs, if they are stuck, your engine will not run good at all.

Although I'm unaware of many springs failing, it would happen if your engine is to sit a long time and get sort of froze up from sitting in one place to long.
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douglasye



Joined: 07 Nov 2006
Posts: 6

PostPosted: Thu Nov 16, 2006 9:18 am    Post subject: Reply with quote

thanks Jingyee
I'm still confused one thing. It's well known 2mm seals are perfectly fine for extremely high boost levels, so at low RPMs higher mass is beneficial.
But more mass in the seal tends to float (pull away from the housing) especially at a lower rpm. are these conclusions self-contradiction?why?
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Jingyee
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Joined: 11 Jul 2005
Posts: 103
Location: Portland, OR

PostPosted: Sat Dec 16, 2006 12:58 am    Post subject: Reply with quote

Hmm, Honestly I'am not sure myself, I will have to ask the experts on Tuesday for you. I sent myself a reminder email to ask for you.
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douglasye



Joined: 07 Nov 2006
Posts: 6

PostPosted: Sat Dec 16, 2006 10:04 pm    Post subject: Reply with quote

thanks Jingyee. Hope for your answer.
Suddenly one more question came to my mind.
Every spring has damp coefficient. If the apex seals are bouncing, will it cost time to let the spring go back its original form?
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