Tribologie Laboratoare Unitbv

7/25/2019 Tribologie Laboratoare Unitbv

1/14

Transilvania University of

Brasov

Faculty of Mechanical Enginnering

Tribology Laboratory

Student: Thierheimer Alexandru

Year I, group 19!,"A#

$oord%: &rof% #r% Ing% "elicu 'adu (a)riel

Academic Year 2015-2016

Semester I


2/14

Lab1. Chain rig

Chain rig components:

1 Electrical engine;

2 Torquemeter (torque sensor);

3 Torsional coupling;

4 Lower earing o!;

" #pper earing o!;

$ Chain %ri&e;

' Tensioning orce sensor;

Tensioning control electrical engine* worm gear* screw+nut transmission;

, Chain lurication circuit;

1- .earings lurication circuit;

11 /ain oil tan0 (chain lurication) with heater;

12 .earing oil tan0;

13 Cooling circuit or oil


3/14

Lab2. Global Chain Drive Friction Measurements vs.Rotation anTensioning

* ** 1*** 1** +*** +***

**

1***

1**

+***

+**

***

**

Testing !rogram

Te-ting &rogram

t" sec

n r#m

1*** 1+** 1.** 1!** 1/** +*** ++** +.** +!** +/** ,***

1

1%1

1%,

1%.

1%!

Friction tor$ue vs. Rotation % &'

Acceleratie #eceleratie

n" r#m

Mf" 'm


4/14

1+** 1+* 1,** 1,* 1.** 1.* 1** 1*1%*.

1%*.

1%*

1%*

1%*!

1%*!

1%*0

1%*0

1%*/

1%*/1%*9

Mf vs. Time %&' %((( r#m

Mf -% Time

tim#" s

Mf" 'm


5/14

1** 1* 1!** 1!* 10** 10* 1/**1%.

1%.1

1%.+

1%.,

1%..

1%.

1%.!

Mf vs. Time 2(((r#m

Mf -% Time +***rpm


6/14

1/** 1/* 19** 19* +*** +** +1**1%!.

1%!

1%!!

1%!0

1%!/

1%!9

1%0

1%01

1%0+

1%0,

Mf vs. Time %&' )(((r#m

Time" s

Mf" 'm

* 1** +** ** .** ** !** 0** /** 9** 1****

**

1***

1**

+***

+**

***

**

Testing *eries )&'

t" sec

m" r#m


7/14

9** 11** 1,** 1** 10** 19** +1** +,** +** +0** +9** ,1** ,,**1%0

1%/

1%9

+

+%1

+%+

+%,

+%.

+%

+%!

Friction tor$ue vs. Rotation ) &'

Acceleratie #eceleratie

n" r#m

Mf" 'm

* * 1** 1* +** +* **1%0

1%0

1%0!

1%0!

1%00

1%00

1%0/

1%0/

1%09

1%091%/

Mf vs. Time )&' %(((r#m

Time" s

Mf" 'm


8/14

** * .** .* ** * !**+%*/

+%1

+%1+

+%1.

+%1!

+%1/

+%+

Mf vs. Time )&' 2(((r#m

Time" s

Mf" 'm

!** !* 0** 0* /** /* 9** 9*+%!

+%/

+%.

+%.+

+%..

+%.!

+%./

+%

Mf vs. Time )&' )(((r#m

Time" s

Mf" 'm


9/14

9** 1.** 19** +.** +9***

*%

1

1%

+

+%

Friction tor$ue vs. Rotation

F 2 134 F 2 34

n" r#m

Mf" 'm


10/14

Lab). Global Chain Drive Friction Measurements vs.

Tem#erature

* +** .** !** /** 1*** 1+***

1*

+*

,*

.*

*

!*

0*

Tem# Ulei

T!:Temp ulei lant T0:Temp ulei lagar

Time" sec

T" gr C

* .* . * 1%1

1%+

1%+

1%

1%

1%.

Friction Tor$ue vs. Tem#

$re-tere Temperatura #e-cre-tere Temperatura

Tem#" gr C

Mf" 'm


11/14

Lab4. Chain Friction vs. Bearing Friction

ier%erile prin recare %in lagare si lant sunt %irect proportionale cu paramtrii (n* * T)

%ata cu cresterea &ite5ei %e rotatie* a ortei %e tensionare in lant sau a temperaturii uleiuluipier%erile prin recare cresc

Cel mai mare contriutor la pier%eri este orta %e tensionare a lantului urmata %e &ite5a %e

rotatie* in unctie %e uleiul olosit temperature acestuia este un actor care inluentea5a %estul %eputin pier%erile prin recare

La orte mici %e tensionare lagarele se ala in 5ona %e luriiere mi!ta sau hi%ro%inamica* o%ata

cu cresterea ortei %e tensionare luriierea poate tin%e spre limita

La &ite5e oarte mici lagarele se ala in luriiere limita spre mi!ta* iar cu cat &ite5a creste

lu&riierea intra in %omeniul mi!t sau hi%ro%inamic* la cresteri oarte mari ale &ite5ei* poate trece

in %omeniul %e luriiere limita

La temperaturi normale %e unctionare uleiul se ala in %omeniul %e luriiere mi!ta si

hi%ro%inamica Cu cat temperature creste sau sca%e %rastic* luriierea poate trece in %omeniul

limita


12/14

Tribometru

Se cere (ra5c $6F7"ite8a

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13/14

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14/14

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