Tutorial: Physics Topic: Spring-mounting Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován.

Prezentace na téma: "Tutorial: Physics Topic: Spring-mounting Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován."— Transkript prezentace:

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2 Tutorial: Physics Topic: Spring-mounting 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.

3 Spring-mounting

4 Secures flexible connection between car body and axle → comfort and driving safety Comfort → means situation with minimal physical and mental exhaustion Car vibration frequency at springing should have frequency from 65 to 110 vibrations per second Driving safety→ providing of friction power between tyre and road at all car working conditions

5 Make the whole car weight Unsprang material – whole car material placed ´under´ springing (disc, tyres, axle etc.) Sprung material – whole car material placed ´over´ springing (frame, car body, crew etc.) Springing quality is determined by ratio of sprang and unsprang materials If ratio is higher, springing has better quality

6 Stressed by bending when the car is riding Leaf spring is a bundle of some metal leaves of spring steel that have rectangular cross section Steel leaves of leaves springs are always set on each other There are these kinds of leaf springs: front, back, longitudinal, transversal and oblique

7 There are used compressed coiled springs with cylindrical wire cross-section made by spring steel Coil rise of coiled springs is determined so that there begins safe clearance by maximal springing compression One of coiled spring components is oil or gas shock absorber

8 Made by cylinder filled with liquid (hydraulic oil) There is mobile piston inside and throttling valve – low pressure and high pressure Piston supplies hydraulic oil pressing Valves supply oil flow throttling and that is why absorber power is produced Liquid absorber can be pressed easily and it is difficult to extend it (correct function)

9 Used at lorries Springing medium - there is closed air in pressure vessel Pneumatic springs need source of pressed air - compressor There are 2 types of pneumatic springs – membrane and bellows Pneumatic springs enable keeping constant height of car body over the roadway or it keeps car body inclining Progression comes at pneumatic springs automatically

10  Find out on the Internet a) Liquid absorber b) Coil springs

11  Describe the test of spring-mounting

12  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.seznam.cz  www.slovnik.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.