Types of motor

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 UNIT 9
MACHINE: Combination of mechanisms able to transform energy to produce
a result. (Comparison between lineal and angular velocity): w=ø/t,
w=V/R. (Power in a gear vs power in lineal moved objects): lineal
moving objects:E=F*d, P=F*v; turning objects: E(applied)=r*ø, P=r*w;
E(spinning)=1/2*I*w2; T=F*radious; (Ø en radianes); I=1/2*m*r2
(kg*m2). Difference: axis:without torsion, shafts:with torsion.
Difference: joints:are movile, fringes:bridas,fixed.
Unit 10
N=60*P/2pi*r*n*fr, P=N*fr*n*2pi*r/60, N=60*p/N*fr*n*2pi*r, P=F*v,
Fr=N*fr, V=n*2pi*r/60.
Screws and nuts: M=Q*p/2pi. Types of weldings: # arc welding, # metal
inert gas welding, # oxy-acetylene welding. Arc welding:
1. The electrode transmits the electric current and is
melted and applied to the zone of union.
2. It’s the own electrode what we add to create the weld. 3. So, we have
to replace it after a lot of uses.
Metal inert gas welding:
Advantage: the gas shields theweld, this way the weld is protected to
the oxygen impurities.
Also, The metal oxydize very fast at high temperatures, that is why we
use the inert gas to protect it.
Oxy-acetylene welding: We regulate the intake of the two gases, this
way we get the torch we need to meld the material. The main advantage
is its portability. 

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