Anglicky v odborných předmětech "Support of teaching technical subjects in English “ - PowerPoint PPT Presentation

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Anglicky v odborných předmětech "Support of teaching technical subjects in English “

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  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Physics Topic: Gearboxes Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Gearboxes

  3. Meaningandusageofgearbox Meaning of gearbox: • Multiplication of torque • Change of revolutions of driven shaft • To choose suitably gearbox ratio • Direction change of revolutions or way Usage of gearbox: Lathes, cars

  4. Gearbox design • Driving shaft– It is driven by engine • Driven shaft– It is driven by driving shaft • Driving shaft gear • Driven shaft gear

  5. Descriptionofindividualparts • Driving shaft – Driven by engine • Gears are firmly fixed • Gears rotate only with shaft • Driven shaft – Driven by driving shaft • Gears are free-fitted • Shaft and wheels can turn (rotate) individually

  6. Ratio Enginetorqueismultiplied by ratio i=D2/D1 i - ratio • D1– Drivingshaftdiameter • D2 – Drivenshaftdiameter • i<1 Step-up gear • i>1 Reductiongear MV = i . M • MV – Finaltorque M- Enginetorque

  7. Gearshifting Manual gearbox– driver chooses ratio with gearshift Sequential gearbox– driver chooses ratio by pressing the button Automatic gearbox– gear shifting begins independently of driver´s will Variable speed gearbox – continuous ratio change

  8. Gearboxkinetics • rotary ► rotary input energy is rotary – output energy is rotary • rotary ► linear input energy is rotary - output energy is linear • linear ► linear input energy is linear – output energy is linear

  9. Activity I • Name the gearbox parts:

  10. Activity II • Give the example of step-up gear • Give the example of reduction gear

  11. Literature • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 1. Brno : Avid, 2004. 211 s. • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 2. Brno : Avid, 2004. 120 s. • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 3. Brno : Avid, 2004. 220 s. • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 4. Brno : Avid, 2004. 350 s. Translation: • www.seznam.cz • www.slovnik.cz • JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, 2000. ISBN 80-7238-075-3 • Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický. 2010.