CALCUL ACUMULATOR

CALCULUL ACUMULATORULUI

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1

[kg/cm2]M

p2 p2 1.033+:= [kg/cm2]abs

p2 11.033= [kg/cm2]abs

Q debitul refulat de pompa [litri/min]• Q 40:= [litri/min]

Domeniul temperaturilor de lucru ale uleiului hidraulic 10~90 grade C•

T1 10:= [grade C] T2 50:= [grade C]

Mediul de lucru: ulei hidraulic•

Calculele cu presiuni se vor face in valori absolute transformand presiunea indicata de manometru in presiune absoluta tinand cont si de presiunea atmosferica.

V1 volumul necesar al acumulatorului [litri]•

Vw volumul de ulei necesar a fi asigurat de acumulatorul hidraulic pentru actionarea cilindrului •[litri]

Vw

π Di2⋅

4S⋅ 10

6−⋅:= [litri]

CALCULUL ACUMULATORILOR HIDRAULICI

Conditiile de lucru si specificatiile sistemului de actionare•

Di diametrul interior al cilindrului de lucru• Di 100:= [mm]

S cursa de lucru a cilindrului [mm]• S 125:= [mm]

v viteza de lucru impusa tijei cilindrului hidraulic [m/sec]• v 0.1:= [m/sec]

p3 presiunea maxima a uleiului in circuitul de lucru [kg/cm2]M (manometru).•

p3 110:= [kg/cm2]M

p3 p3 1.033+:= [kg/cm2]abs

p3 111.033= [kg/cm2]abs

p2 presiunea minima a uleiului in circuitul de lucru [kg/cm2]M (manometru).•

p2 10:=


HIDRAULIC

2

( ) ( ) ( )

p1p2

0.02⋅+ p1p+

0.02 p1p⋅ p1⋅ p1+ b p1p2⋅ 0.02⋅ T2 T1−( )⋅ b p1p⋅ T2 T1−( )⋅+ 0.02 p1p⋅ c⋅ T2 T1−( )⋅− +=

p1 0.02 p1p⋅ 1+( )⋅ b p1p⋅ 0.02 p1p⋅ 1+( )⋅ 0.02 p1p⋅ c⋅− T2 T1−( )⋅ p1p 0.02 p1p⋅ 1+( )⋅+=

p1

b p1p⋅ 0.02 p1p⋅ 1+( )⋅ 0.02 p1p⋅ c⋅−

0.02 p1p⋅ 1+

T2 T1−( )⋅ p1p+=

p1 b p1p⋅ c0.02 p1p⋅

0.02 p1p⋅ 1+⋅−

T2 T1−( )⋅ p1p+=

a b p1p⋅ c0.02 p1p⋅

0.02 p1p⋅ 1+⋅−=

c 8233 6794 104⋅ T1 696−( )2−−

10

2−⋅:=

b 488 2065 102⋅ T1 170−( )2−−

10

4−⋅:=

a b p1p⋅ c 11

0.02 p1p⋅ 1+−

⋅−=

p1 a T2 T1−( )⋅ p1p+=

[kg/cm2]absp1 9.9297=

[kg/cm2]absp1 0.9 p2⋅:=Se adopta:

0.5 px⋅ p1≤ 0.8 px⋅≤ca amortizor de pulsatii

0.5 px⋅ p1≤ 0.8 px⋅≤ca amortizor de soc

0.8 p2⋅ p1≤ 0.9 p2⋅≤ca rezerva de energie

p1 presiunea gazului de incarcare a acumulatorului [kg/cm2]abs.•

[litri]Vw 0.9817=


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b coeficientul de compresie a diafragmei acumulatorului•

a 10.0637=a

p3

p2

:=

a coeficientul presiunii de lucru a uleiului (fluidului de lucru) din circuit•

e 0.8026=ep1p

p2

:=

e coeficientul presiunii de incarcare a gazului•

pm presiunea maxima admisa a pulsatiei uleiului in circuitul de lucru [kg/cm2]abs.•

px presiunea de reglaj a supapei de limitare a presiunii in circuitul de lucru [kg/cm2]abs.•

[kg/cm2]abs.pa 61.033=[kg/cm2]abs.pa

p3 p2+

2:=

pa presiunea medie a uleiului in circuitul de lucru [kg/cm2]abs.•

[kg/cm2]absp1p 8.8546=

[kg/cm2]absp1p p1p1:=Este valabila solutia:

p1p2 44.8312−=p1p1 8.8546=

p1p2

b1− b12

4 a1⋅ c1⋅−−2 a1⋅

:=p1p1

b1− b12

4 a1⋅ c1⋅−+2 a1⋅

:=

p1p2

a1⋅ p1p b1⋅+ c1+ 0=

c1 p1−:=

b1 b T2 T1−( )⋅ 0.02 c⋅ T2 T1−( )⋅− 0.02 p1⋅− 1+:=

a1 b 0.02⋅ T2 T1−( )⋅ 0.02+:=Notam:

p1p2

b 0.02⋅ T2 T1−( )⋅ 0.02+ ⋅ p1p b T2 T1−( )⋅ 0.02 c⋅ T2 T1−( )⋅− 0.02 p1⋅− 1+ ⋅+ p1− 0=


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[kg]Wπ d

2⋅

4L⋅ γ⋅ 10

6−⋅=

W greutatea fluidului din interiorul conductelor [kg]•

[kg/m3]γapaglicol 1100:=

[kg/m3]γapa 1000:=

[kg/m3]γulei 880:=

γ masa specifica a fluidului de lucru [kg/m3]•

L lungimea totala a conductelor [m]•

d diametrul interior al conductei [mm]•

[m/s2]g 9.8066:=g acceleratia gravitationala [m/s2]•

bp3

p1p

:=b 12.5395=

η randamentul global al acumulatorului• η 0.95:=

Determinam timpul de incarcare al acumulatorului Tm•

Tm

Vw

Q

60

:= [secunde]

Tm 1.4726= [secunde]

Determinam timpul de descarcare al acumulatorului Tn•

Tn

S

v10

3−⋅:= [secunde]

Tn 1.25= [secunde]

m exponentul politropic pentru timpul de incarcare cu ulei al acumulatorului (se ia din tabel sau •se calculeaza)

n exponentul politropic pentru timpul de descarcare a uleiului din acumulator (se ia din tabel •sau se calculeaza)

vc viteza de curgere a uleiului prin conducta [m/s]•


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Pentru valori mari ale lui "e" (coeficientul presiunii de incarcare a gazului) se poate alege un 1.

OBSERVATII

[litri]Vw v1 e⋅ η⋅ F⋅=

Vw volumul de ulei necesar a fi asigurat de acumulatorul hidraulic pentru actionarea cilindrului •[litri] se calculeaza cu relatia:

[litri]v1

Vw

e η⋅ F⋅=

V1 volumul necesar al acumulatorului [litri] se determina cu relatia:•

1. REZERVA DE ENERGIE

F1 0.06=

Pompa multiplunjer•

F1 0.06=

Pompa triplex (trei plunjere (pistoane)) cu dubla actiune•

F1 0.13=

Pompa triplex (trei plunjere (pistoane)) cu simpla actiune•

F1 0.15=

Pompa duplex (doua plunjere (pistoane)) cu dubla actiune•

F1 0.25=

Pompa duplex (doua plunjere (pistoane)) cu simpla actiune•

F1 0.25=

Pompa simplex (un singur plunjer (piston)) cu dubla actiune•

F1 0.6=

Pompa simplex (un singur plunjer (piston)) cu simpla actiune•

F1 coeficientul de refulare a pompei. Se determina in functie de tipul pompei si numarul de •pistoane al acesteia.

q capacitatea geometrica a pompei [litri/rot]•


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acumulator de marime mica;Daca "e" depaseste 0.9 durata de viata a diafragmei acumulatorului va fi scurta;2.Pentru valori mari ale lui "a" (coeficientul presiunii de lucru a uleiului (fluidului de lucru) din 3.circuit) se poate alege un acumulator de marime mica;Daca coeficientul de compresie a diafragmei acumulatorului "b" devine mare atunci durata de 4.viata a acestuia va fi scurta. Valori recomandate pentru coeficientul b=p3/p1 de firma sunt date dupa cum urmeaza: 1 ACUMULATOR INSTALAT VERTICAL b=4 2 ACUMULATOR INSTALAT ORIZONTAL b=3 Pentru valori mai mari decat cele indicate se recomanda consulatarea specialistilor firmei producatoare."m" si "n" trebuiesc alese obligatoriu in functie de presiunea medie a uleiului pa precum si a 5.

timpului de incarcare /descarcare a acumulatorului care se alege din tabele sau se calculeaza cu relatiile aferente.Daca m>n calculul se va face considerand m=n6.

p pa:= Tm 1.4726=

m 1.42 p 20<( ) Tm 15<( )∧if

1.44 20 p≤ 30<( ) Tm 15<( )∧if

1.47 30 p≤ 40<( ) Tm 15<( )∧if

1.5 40 p≤ 50<( ) Tm 15<( )∧if

1.52 50 p≤ 60<( ) Tm 15<( )∧if

1.55 60 p≤ 70<( ) Tm 15<( )∧if

1.59 70 p≤ 80<( ) Tm 15<( )∧if

1.62 80 p≤ 90<( ) Tm 15<( )∧if

1.65 90 p≤ 100<( ) Tm 15<( )∧if

1.68 100 p≤ 110<( ) Tm 15<( )∧if

1.72 110 p≤ 120<( ) Tm 15<( )∧if

1.75 120 p≤ 130<( ) Tm 15<( )∧if

1.79 130 p≤ 140<( ) Tm 15<( )∧if

1.82 140 p≤ 150<( ) Tm 15<( )∧if

1.86 150 p≤ 160<( ) Tm 15<( )∧if

1.89 160 p≤ 170<( ) Tm 15<( )∧if

1.93 170 p≤ 180<( ) Tm 15<( )∧if

1.96 180 p≤ 190<( ) Tm 15<( )∧if

2 190 p≤ 200<( ) Tm 15<( )∧if

:=


HIDRAULIC

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( )1.38 p 20<( ) 15 Tm≤ 30<( )∧if

1.4 20 p≤ 30<( ) 15 Tm≤ 30<( )∧if

1.43 30 p≤ 40<( ) 15 Tm≤ 30<( )∧if

1.45 40 p≤ 50<( ) 15 Tm≤ 30<( )∧if

1.48 50 p≤ 60<( ) 15 Tm≤ 30<( )∧if

1.51 60 p≤ 70<( ) 15 Tm≤ 30<( )∧if

1.54 70 p≤ 80<( ) 15 Tm≤ 30<( )∧if

1.57 80 p≤ 90<( ) 15 Tm≤ 30<( )∧if

1.6 90 p≤ 100<( ) 15 Tm≤ 30<( )∧if

1.63 100 p≤ 110<( ) 15 Tm≤ 30<( )∧if

1.66 110 p≤ 120<( ) 15 Tm≤ 30<( )∧if

1.7 120 p≤ 130<( ) 15 Tm≤ 30<( )∧if

1.73 130 p≤ 140<( ) 15 Tm≤ 30<( )∧if

1.76 140 p≤ 150<( ) 15 Tm≤ 30<( )∧if

1.8 150 p≤ 160<( ) 15 Tm≤ 30<( )∧if

1.83 160 p≤ 170<( ) 15 Tm≤ 30<( )∧if

1.87 170 p≤ 180<( ) 15 Tm≤ 30<( )∧if

1.9 180 p≤ 190<( ) 15 Tm≤ 30<( )∧if

1.93 190 p≤ 200<( ) 15 Tm≤ 30<( )∧if

1.34 p 20<( ) 30 Tm≤ 60<( )∧if

1.35 20 p≤ 30<( ) 30 Tm≤ 60<( )∧if

1.38 30 p≤ 40<( ) 30 Tm≤ 60<( )∧if

1.4 40 p≤ 50<( ) 30 Tm≤ 60<( )∧if

1.43 50 p≤ 60<( ) 30 Tm≤ 60<( )∧if

1.45 60 p≤ 70<( ) 30 Tm≤ 60<( )∧if

1.48 70 p≤ 80<( ) 30 Tm≤ 60<( )∧if

1.51 80 p≤ 90<( ) 30 Tm≤ 60<( )∧if

1.54 90 p≤ 100<( ) 30 Tm≤ 60<( )∧if


HIDRAULIC

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1.54 90 p≤ 100<( ) 30 Tm≤ 60<( )∧if

1.57 100 p≤ 110<( ) 30 Tm≤ 60<( )∧if

1.6 110 p≤ 120<( ) 30 Tm≤ 60<( )∧if

1.63 120 p≤ 130<( ) 30 Tm≤ 60<( )∧if

1.66 130 p≤ 140<( ) 30 Tm≤ 60<( )∧if

1.7 140 p≤ 150<( ) 30 Tm≤ 60<( )∧if

1.73 150 p≤ 160<( ) 30 Tm≤ 60<( )∧if

1.76 160 p≤ 170<( ) 30 Tm≤ 60<( )∧if

1.8 170 p≤ 180<( ) 30 Tm≤ 60<( )∧if

1.83 180 p≤ 190<( ) 30 Tm≤ 60<( )∧if

1.86 190 p≤ 200<( ) 30 Tm≤ 60<( )∧if

1.29 p 20<( ) 60 Tm≤ 120<( )∧if

1.31 20 p≤ 30<( ) 60 Tm≤ 120<( )∧if

1.33 30 p≤ 40<( ) 60 Tm≤ 120<( )∧if

1.35 40 p≤ 50<( ) 60 Tm≤ 120<( )∧if

1.37 50 p≤ 60<( ) 60 Tm≤ 120<( )∧if

1.4 60 p≤ 70<( ) 60 Tm≤ 120<( )∧if

1.42 70 p≤ 80<( ) 60 Tm≤ 120<( )∧if

1.45 80 p≤ 90<( ) 60 Tm≤ 120<( )∧if

1.48 90 p≤ 100<( ) 60 Tm≤ 120<( )∧if

1.51 100 p≤ 110<( ) 60 Tm≤ 120<( )∧if

1.54 110 p≤ 120<( ) 60 Tm≤ 120<( )∧if

1.57 120 p≤ 130<( ) 60 Tm≤ 120<( )∧if

1.6 130 p≤ 140<( ) 60 Tm≤ 120<( )∧if

1.63 140 p≤ 150<( ) 60 Tm≤ 120<( )∧if

1.66 150 p≤ 160<( ) 60 Tm≤ 120<( )∧if

1.69 160 p≤ 170<( ) 60 Tm≤ 120<( )∧if

1.73 170 p≤ 180<( ) 60 Tm≤ 120<( )∧if

( )


HIDRAULIC

9

1.76 180 p≤ 190<( ) 60 Tm≤ 120<( )∧if

1.79 190 p≤ 200<( ) 60 Tm≤ 120<( )∧if

1.24 p 20<( ) 120 Tm≤ 240<( )∧if

1.26 20 p≤ 30<( ) 120 Tm≤ 240<( )∧if

1.28 30 p≤ 40<( ) 120 Tm≤ 240<( )∧if

1.3 40 p≤ 50<( ) 120 Tm≤ 240<( )∧if

1.32 50 p≤ 60<( ) 120 Tm≤ 240<( )∧if

1.34 60 p≤ 70<( ) 120 Tm≤ 240<( )∧if

1.37 70 p≤ 80<( ) 120 Tm≤ 240<( )∧if

1.39 80 p≤ 90<( ) 120 Tm≤ 240<( )∧if

1.42 90 p≤ 100<( ) 120 Tm≤ 240<( )∧if

1.45 100 p≤ 110<( ) 120 Tm≤ 240<( )∧if

1.47 110 p≤ 120<( ) 120 Tm≤ 240<( )∧if

1.5 120 p≤ 130<( ) 120 Tm≤ 240<( )∧if

1.53 130 p≤ 140<( ) 120 Tm≤ 240<( )∧if

1.56 140 p≤ 150<( ) 120 Tm≤ 240<( )∧if

1.59 150 p≤ 160<( ) 120 Tm≤ 240<( )∧if

1.62 160 p≤ 170<( ) 120 Tm≤ 240<( )∧if

1.65 170 p≤ 180<( ) 120 Tm≤ 240<( )∧if

1.68 180 p≤ 190<( ) 120 Tm≤ 240<( )∧if

1.72 190 p≤ 200<( ) 120 Tm≤ 240<( )∧if

1.19 p 20<( ) 240 Tm≤ 480<( )∧if

1.21 20 p≤ 30<( ) 240 Tm≤ 480<( )∧if

1.22 30 p≤ 40<( ) 240 Tm≤ 480<( )∧if

1.24 40 p≤ 50<( ) 240 Tm≤ 480<( )∧if

1.26 50 p≤ 60<( ) 240 Tm≤ 480<( )∧if

1.28 60 p≤ 70<( ) 240 Tm≤ 480<( )∧if

1.31 70 p≤ 80<( ) 240 Tm≤ 480<( )∧if


HIDRAULIC

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1.31 70 p≤ 80<( ) 240 Tm≤ 480<( )∧if

1.33 80 p≤ 90<( ) 240 Tm≤ 480<( )∧if

1.35 90 p≤ 100<( ) 240 Tm≤ 480<( )∧if

1.38 100 p≤ 110<( ) 240 Tm≤ 480<( )∧if

1.41 110 p≤ 120<( ) 240 Tm≤ 480<( )∧if

1.43 120 p≤ 130<( ) 240 Tm≤ 480<( )∧if

1.46 130 p≤ 140<( ) 240 Tm≤ 480<( )∧if

1.49 140 p≤ 150<( ) 240 Tm≤ 480<( )∧if

1.52 150 p≤ 160<( ) 240 Tm≤ 480<( )∧if

1.55 160 p≤ 170<( ) 240 Tm≤ 480<( )∧if

1.58 170 p≤ 180<( ) 240 Tm≤ 480<( )∧if

1.61 180 p≤ 190<( ) 240 Tm≤ 480<( )∧if

1.64 190 p≤ 200<( ) 240 Tm≤ 480<( )∧if

1.15 p 20<( ) 480 Tm≤ 900<( )∧if

1.16 20 p≤ 30<( ) 480 Tm≤ 900<( )∧if

1.17 30 p≤ 40<( ) 480 Tm≤ 900<( )∧if

1.18 40 p≤ 50<( ) 480 Tm≤ 900<( )∧if

1.2 50 p≤ 60<( ) 480 Tm≤ 900<( )∧if

1.22 60 p≤ 70<( ) 480 Tm≤ 900<( )∧if

1.24 70 p≤ 80<( ) 480 Tm≤ 900<( )∧if

1.27 80 p≤ 90<( ) 480 Tm≤ 900<( )∧if

1.29 90 p≤ 100<( ) 480 Tm≤ 900<( )∧if

1.31 100 p≤ 110<( ) 480 Tm≤ 900<( )∧if

1.34 110 p≤ 120<( ) 480 Tm≤ 900<( )∧if

1.37 120 p≤ 130<( ) 480 Tm≤ 900<( )∧if

1.39 130 p≤ 140<( ) 480 Tm≤ 900<( )∧if

1.42 140 p≤ 150<( ) 480 Tm≤ 900<( )∧if

1.45 150 p≤ 160<( ) 480 Tm≤ 900<( )∧if

( )


HIDRAULIC

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1.47 160 p≤ 170<( ) 480 Tm≤ 900<( )∧if

1.5 170 p≤ 180<( ) 480 Tm≤ 900<( )∧if

1.53 180 p≤ 190<( ) 480 Tm≤ 900<( )∧if

1.56 190 p≤ 200<( ) 480 Tm≤ 900<( )∧if

1.1 p 20<( ) 900 Tm≤ 1800<( )∧if

1.11 20 p≤ 30<( ) 900 Tm≤ 1800<( )∧if

1.12 30 p≤ 40<( ) 900 Tm≤ 1800<( )∧if

1.13 40 p≤ 50<( ) 900 Tm≤ 1800<( )∧if

1.15 50 p≤ 60<( ) 900 Tm≤ 1800<( )∧if

1.17 60 p≤ 70<( ) 900 Tm≤ 1800<( )∧if

1.19 70 p≤ 80<( ) 900 Tm≤ 1800<( )∧if

1.21 80 p≤ 90<( ) 900 Tm≤ 1800<( )∧if

1.23 90 p≤ 100<( ) 900 Tm≤ 1800<( )∧if

1.25 100 p≤ 110<( ) 900 Tm≤ 1800<( )∧if

1.27 110 p≤ 120<( ) 900 Tm≤ 1800<( )∧if

1.3 120 p≤ 130<( ) 900 Tm≤ 1800<( )∧if

1.32 130 p≤ 140<( ) 900 Tm≤ 1800<( )∧if

1.35 140 p≤ 150<( ) 900 Tm≤ 1800<( )∧if

1.37 150 p≤ 160<( ) 900 Tm≤ 1800<( )∧if

1.4 160 p≤ 170<( ) 900 Tm≤ 1800<( )∧if

1.43 170 p≤ 180<( ) 900 Tm≤ 1800<( )∧if

1.45 180 p≤ 190<( ) 900 Tm≤ 1800<( )∧if

1.48 190 p≤ 200<( ) 900 Tm≤ 1800<( )∧if

1.05 p 20<( ) 1800 Tm≤( )∧if

1.05 20 p≤ 30<( ) 1800 Tm≤( )∧if

1.06 30 p≤ 40<( ) 1800 Tm≤( )∧if

1.07 40 p≤ 50<( ) 1800 Tm≤( )∧if

1.09 50 p≤ 60<( ) 1800 Tm≤( )∧if


HIDRAULIC

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1.09 50 p≤ 60<( ) 1800 Tm≤( )∧if

1.1 60 p≤ 70<( ) 1800 Tm≤( )∧if

1.12 70 p≤ 80<( ) 1800 Tm≤( )∧if

1.14 80 p≤ 90<( ) 1800 Tm≤( )∧if

1.16 90 p≤ 100<( ) 1800 Tm≤( )∧if

1.18 100 p≤ 110<( ) 1800 Tm≤( )∧if

1.2 110 p≤ 120<( ) 1800 Tm≤( )∧if

1.22 120 p≤ 130<( ) 1800 Tm≤( )∧if

1.24 130 p≤ 140<( ) 1800 Tm≤( )∧if

1.27 140 p≤ 150<( ) 1800 Tm≤( )∧if

1.29 150 p≤ 160<( ) 1800 Tm≤( )∧if

1.31 160 p≤ 170<( ) 1800 Tm≤( )∧if

1.34 170 p≤ 180<( ) 1800 Tm≤( )∧if

1.36 180 p≤ 190<( ) 1800 Tm≤( )∧if

1.39 190 p≤ 200<( ) 1800 Tm≤( )∧if

m 1.55= Tn 1.25=

( )


HIDRAULIC

13

n 1.42 p 20<( ) Tn 15<( )∧if

1.44 20 p≤ 30<( ) Tn 15<( )∧if

1.47 30 p≤ 40<( ) Tn 15<( )∧if

1.5 40 p≤ 50<( ) Tn 15<( )∧if

1.52 50 p≤ 60<( ) Tn 15<( )∧if

1.55 60 p≤ 70<( ) Tn 15<( )∧if

1.59 70 p≤ 80<( ) Tn 15<( )∧if

1.62 80 p≤ 90<( ) Tn 15<( )∧if

1.65 90 p≤ 100<( ) Tn 15<( )∧if

1.68 100 p≤ 110<( ) Tn 15<( )∧if

1.72 110 p≤ 120<( ) Tn 15<( )∧if

1.75 120 p≤ 130<( ) Tn 15<( )∧if

1.79 130 p≤ 140<( ) Tn 15<( )∧if

1.82 140 p≤ 150<( ) Tn 15<( )∧if

1.86 150 p≤ 160<( ) Tn 15<( )∧if

1.89 160 p≤ 170<( ) Tn 15<( )∧if

1.93 170 p≤ 180<( ) Tn 15<( )∧if

1.96 180 p≤ 190<( ) Tn 15<( )∧if

2 190 p≤ 200<( ) Tn 15<( )∧if

1.38 p 20<( ) 15 Tn≤ 30<( )∧if

1.4 20 p≤ 30<( ) 15 Tn≤ 30<( )∧if

1.43 30 p≤ 40<( ) 15 Tn≤ 30<( )∧if

1.45 40 p≤ 50<( ) 15 Tn≤ 30<( )∧if

1.48 50 p≤ 60<( ) 15 Tn≤ 30<( )∧if

1.51 60 p≤ 70<( ) 15 Tn≤ 30<( )∧if

1.54 70 p≤ 80<( ) 15 Tn≤ 30<( )∧if

1.57 80 p≤ 90<( ) 15 Tn≤ 30<( )∧if

1.6 90 p≤ 100<( ) 15 Tn≤ 30<( )∧if

:=


HIDRAULIC

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1.6 90 p≤ 100<( ) 15 Tn≤ 30<( )∧if

1.63 100 p≤ 110<( ) 15 Tn≤ 30<( )∧if

1.66 110 p≤ 120<( ) 15 Tn≤ 30<( )∧if

1.7 120 p≤ 130<( ) 15 Tn≤ 30<( )∧if

1.73 130 p≤ 140<( ) 15 Tn≤ 30<( )∧if

1.76 140 p≤ 150<( ) 15 Tn≤ 30<( )∧if

1.8 150 p≤ 160<( ) 15 Tn≤ 30<( )∧if

1.83 160 p≤ 170<( ) 15 Tn≤ 30<( )∧if

1.87 170 p≤ 180<( ) 15 Tn≤ 30<( )∧if

1.9 180 p≤ 190<( ) 15 Tn≤ 30<( )∧if

1.93 190 p≤ 200<( ) 15 Tn≤ 30<( )∧if

1.34 p 20<( ) 30 Tn≤ 60<( )∧if

1.35 20 p≤ 30<( ) 30 Tn≤ 60<( )∧if

1.38 30 p≤ 40<( ) 30 Tn≤ 60<( )∧if

1.4 40 p≤ 50<( ) 30 Tn≤ 60<( )∧if

1.43 50 p≤ 60<( ) 30 Tn≤ 60<( )∧if

1.45 60 p≤ 70<( ) 30 Tn≤ 60<( )∧if

1.48 70 p≤ 80<( ) 30 Tn≤ 60<( )∧if

1.51 80 p≤ 90<( ) 30 Tn≤ 60<( )∧if

1.54 90 p≤ 100<( ) 30 Tn≤ 60<( )∧if

1.57 100 p≤ 110<( ) 30 Tn≤ 60<( )∧if

1.6 110 p≤ 120<( ) 30 Tn≤ 60<( )∧if

1.63 120 p≤ 130<( ) 30 Tn≤ 60<( )∧if

1.66 130 p≤ 140<( ) 30 Tn≤ 60<( )∧if

1.7 140 p≤ 150<( ) 30 Tn≤ 60<( )∧if

1.73 150 p≤ 160<( ) 30 Tn≤ 60<( )∧if

1.76 160 p≤ 170<( ) 30 Tn≤ 60<( )∧if

1.8 170 p≤ 180<( ) 30 Tn≤ 60<( )∧if

1.83 180 p≤ 190<( ) 30 T≤ 60<( )∧if


HIDRAULIC

15

1.83 180 p≤ 190<( ) 30 Tn≤ 60<( )∧if

1.86 190 p≤ 200<( ) 30 Tn≤ 60<( )∧if

1.29 p 20<( ) 60 Tn≤ 120<( )∧if

1.31 20 p≤ 30<( ) 60 Tn≤ 120<( )∧if

1.33 30 p≤ 40<( ) 60 Tn≤ 120<( )∧if

1.35 40 p≤ 50<( ) 60 Tn≤ 120<( )∧if

1.37 50 p≤ 60<( ) 60 Tn≤ 120<( )∧if

1.4 60 p≤ 70<( ) 60 Tn≤ 120<( )∧if

1.42 70 p≤ 80<( ) 60 Tn≤ 120<( )∧if

1.45 80 p≤ 90<( ) 60 Tn≤ 120<( )∧if

1.48 90 p≤ 100<( ) 60 Tn≤ 120<( )∧if

1.51 100 p≤ 110<( ) 60 Tn≤ 120<( )∧if

1.54 110 p≤ 120<( ) 60 Tn≤ 120<( )∧if

1.57 120 p≤ 130<( ) 60 Tn≤ 120<( )∧if

1.6 130 p≤ 140<( ) 60 Tn≤ 120<( )∧if

1.63 140 p≤ 150<( ) 60 Tn≤ 120<( )∧if

1.66 150 p≤ 160<( ) 60 Tn≤ 120<( )∧if

1.69 160 p≤ 170<( ) 60 Tn≤ 120<( )∧if

1.73 170 p≤ 180<( ) 60 Tn≤ 120<( )∧if

1.76 180 p≤ 190<( ) 60 Tn≤ 120<( )∧if

1.79 190 p≤ 200<( ) 60 Tn≤ 120<( )∧if

1.24 p 20<( ) 120 Tn≤ 240<( )∧if

1.26 20 p≤ 30<( ) 120 Tn≤ 240<( )∧if

1.28 30 p≤ 40<( ) 120 Tn≤ 240<( )∧if

1.3 40 p≤ 50<( ) 120 Tn≤ 240<( )∧if

1.32 50 p≤ 60<( ) 120 Tn≤ 240<( )∧if

1.34 60 p≤ 70<( ) 120 Tn≤ 240<( )∧if

1.37 70 p≤ 80<( ) 120 Tn≤ 240<( )∧if


HIDRAULIC

16

n( )1.39 80 p≤ 90<( ) 120 Tn≤ 240<( )∧if

1.42 90 p≤ 100<( ) 120 Tn≤ 240<( )∧if

1.45 100 p≤ 110<( ) 120 Tn≤ 240<( )∧if

1.47 110 p≤ 120<( ) 120 Tn≤ 240<( )∧if

1.5 120 p≤ 130<( ) 120 Tn≤ 240<( )∧if

1.53 130 p≤ 140<( ) 120 Tn≤ 240<( )∧if

1.56 140 p≤ 150<( ) 120 Tn≤ 240<( )∧if

1.59 150 p≤ 160<( ) 120 Tn≤ 240<( )∧if

1.62 160 p≤ 170<( ) 120 Tn≤ 240<( )∧if

1.65 170 p≤ 180<( ) 120 Tn≤ 240<( )∧if

1.68 180 p≤ 190<( ) 120 Tn≤ 240<( )∧if

1.72 190 p≤ 200<( ) 120 Tn≤ 240<( )∧if

1.19 p 20<( ) 240 Tn≤ 480<( )∧if

1.21 20 p≤ 30<( ) 240 Tn≤ 480<( )∧if

1.22 30 p≤ 40<( ) 240 Tn≤ 480<( )∧if

1.24 40 p≤ 50<( ) 240 Tn≤ 480<( )∧if

1.26 50 p≤ 60<( ) 240 Tn≤ 480<( )∧if

1.28 60 p≤ 70<( ) 240 Tn≤ 480<( )∧if

1.31 70 p≤ 80<( ) 240 Tn≤ 480<( )∧if

1.33 80 p≤ 90<( ) 240 Tn≤ 480<( )∧if

1.35 90 p≤ 100<( ) 240 Tn≤ 480<( )∧if

1.38 100 p≤ 110<( ) 240 Tn≤ 480<( )∧if

1.41 110 p≤ 120<( ) 240 Tn≤ 480<( )∧if

1.43 120 p≤ 130<( ) 240 Tn≤ 480<( )∧if

1.46 130 p≤ 140<( ) 240 Tn≤ 480<( )∧if

1.49 140 p≤ 150<( ) 240 Tn≤ 480<( )∧if

1.52 150 p≤ 160<( ) 240 Tn≤ 480<( )∧if

1.55 160 p≤ 170<( ) 240 T≤ 480<( )∧if


HIDRAULIC

17

1.55 160 p≤ 170<( ) 240 Tn≤ 480<( )∧if

1.58 170 p≤ 180<( ) 240 Tn≤ 480<( )∧if

1.61 180 p≤ 190<( ) 240 Tn≤ 480<( )∧if

1.64 190 p≤ 200<( ) 240 Tn≤ 480<( )∧if

1.15 p 20<( ) 480 Tn≤ 900<( )∧if

1.16 20 p≤ 30<( ) 480 Tn≤ 900<( )∧if

1.17 30 p≤ 40<( ) 480 Tn≤ 900<( )∧if

1.18 40 p≤ 50<( ) 480 Tn≤ 900<( )∧if

1.2 50 p≤ 60<( ) 480 Tn≤ 900<( )∧if

1.22 60 p≤ 70<( ) 480 Tn≤ 900<( )∧if

1.24 70 p≤ 80<( ) 480 Tn≤ 900<( )∧if

1.27 80 p≤ 90<( ) 480 Tn≤ 900<( )∧if

1.29 90 p≤ 100<( ) 480 Tn≤ 900<( )∧if

1.31 100 p≤ 110<( ) 480 Tn≤ 900<( )∧if

1.34 110 p≤ 120<( ) 480 Tn≤ 900<( )∧if

1.37 120 p≤ 130<( ) 480 Tn≤ 900<( )∧if

1.39 130 p≤ 140<( ) 480 Tn≤ 900<( )∧if

1.42 140 p≤ 150<( ) 480 Tn≤ 900<( )∧if

1.45 150 p≤ 160<( ) 480 Tn≤ 900<( )∧if

1.47 160 p≤ 170<( ) 480 Tn≤ 900<( )∧if

1.5 170 p≤ 180<( ) 480 Tn≤ 900<( )∧if

1.53 180 p≤ 190<( ) 480 Tn≤ 900<( )∧if

1.56 190 p≤ 200<( ) 480 Tn≤ 900<( )∧if

1.1 p 20<( ) 900 Tn≤ 1800<( )∧if

1.11 20 p≤ 30<( ) 900 Tn≤ 1800<( )∧if

1.12 30 p≤ 40<( ) 900 Tn≤ 1800<( )∧if

1.13 40 p≤ 50<( ) 900 Tn≤ 1800<( )∧if

1.15 50 p≤ 60<( ) 900 Tn≤ 1800<( )∧if

( )


HIDRAULIC

18

1.17 60 p≤ 70<( ) 900 Tn≤ 1800<( )∧if

1.19 70 p≤ 80<( ) 900 Tn≤ 1800<( )∧if

1.21 80 p≤ 90<( ) 900 Tn≤ 1800<( )∧if

1.23 90 p≤ 100<( ) 900 Tn≤ 1800<( )∧if

1.25 100 p≤ 110<( ) 900 Tn≤ 1800<( )∧if

1.27 110 p≤ 120<( ) 900 Tn≤ 1800<( )∧if

1.3 120 p≤ 130<( ) 900 Tn≤ 1800<( )∧if

1.32 130 p≤ 140<( ) 900 Tn≤ 1800<( )∧if

1.35 140 p≤ 150<( ) 900 Tn≤ 1800<( )∧if

1.37 150 p≤ 160<( ) 900 Tn≤ 1800<( )∧if

1.4 160 p≤ 170<( ) 900 Tn≤ 1800<( )∧if

1.43 170 p≤ 180<( ) 900 Tn≤ 1800<( )∧if

1.45 180 p≤ 190<( ) 900 Tn≤ 1800<( )∧if

1.48 190 p≤ 200<( ) 900 Tn≤ 1800<( )∧if

1.05 p 20<( ) 1800 Tn≤( )∧if

1.05 20 p≤ 30<( ) 1800 Tn≤( )∧if

1.06 30 p≤ 40<( ) 1800 Tn≤( )∧if

1.07 40 p≤ 50<( ) 1800 Tn≤( )∧if

1.09 50 p≤ 60<( ) 1800 Tn≤( )∧if

1.1 60 p≤ 70<( ) 1800 Tn≤( )∧if

1.12 70 p≤ 80<( ) 1800 Tn≤( )∧if

1.14 80 p≤ 90<( ) 1800 Tn≤( )∧if

1.16 90 p≤ 100<( ) 1800 Tn≤( )∧if

1.18 100 p≤ 110<( ) 1800 Tn≤( )∧if

1.2 110 p≤ 120<( ) 1800 Tn≤( )∧if

1.22 120 p≤ 130<( ) 1800 Tn≤( )∧if

1.24 130 p≤ 140<( ) 1800 Tn≤( )∧if

1.27 140 p≤ 150<( ) 1800 Tn≤( )∧if


HIDRAULIC

19

1.27 140 p≤ 150<( ) 1800 Tn≤( )∧if

1.29 150 p≤ 160<( ) 1800 Tn≤( )∧if

1.31 160 p≤ 170<( ) 1800 Tn≤( )∧if

1.34 170 p≤ 180<( ) 1800 Tn≤( )∧if

1.36 180 p≤ 190<( ) 1800 Tn≤( )∧if

1.39 190 p≤ 200<( ) 1800 Tn≤( )∧if

m 1.55= n 1.55=

Valorile m si n se mai pot calcula cu urmatoarea relatie empirica NACOL:

mc 0.00092 p⋅ 2.5 3.7 log Tm( )−+( )⋅ 1.34+ 0.2 log Tm( )⋅−18 0.45 log Tm( )+⋅

p 95++:=

mc 1.643=

nc 0.00092 p⋅ 2.5 3.7 log Tn( )−+( )⋅ 1.34+ 0.2 log Tn( )⋅−18 0.45 log Tn( )+⋅

p 95++:=

nc 1.6529=

F coeficientul de descarcare a uleiului din acumulator•

Fa

1

n1−

a

1

m

:=

F 0.7745=

Fc

a

1

nc1−

a

1

mc

:=

Fc 0.7463=


HIDRAULIC

20

1. REZERVA DE ENERGIE

V1 volumul necesar al acumulatorului [litri] se determina cu relatia:•

v1

Vw

e η⋅ F⋅:= [litri]

v1 1.6625= [litri]

Determinam debitul de ulei necesar la descarcarea acumulatorului Qd [litri/sec]•

Qd

Vw

Tn

:= [litri/sec]

Qd 0.7854= [litri/sec]

Din catalog se alege sau se aleg dupa caz acumulatorii care sa satisfaca conditia de debit determinata mai sus.

Date post:	30-Oct-2014
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