Documento tecnico para diseño de valvulas y compuertas
Description : PPT presentation of different types of valves with their uses & limitation
ValvesFull description
technical sheetDescription complète
Valves
basics
Full description
Full description
Descrição completa
Descripción completa
Control de servomotor
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Descripción completa
Servo Valves
HYDRAULIC SERVO SOLENOID VALVES CONTENTS
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Servo Valves
HYDRAULIC SERVO SOLENOID VALVES General Spool principle
Sliding spool principle
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Servo Valves
Solenoid actuation with position control of valve spool
Solenoid actuation with position control of valve spool
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Servo Valves
Graphic symbol
A
B
P
T
10V
A
B
A
B
P
T
P
T
Graphic symbol
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Servo Valves
Zero overlap in mid-position
Zero overlap in mid-position Pressure intensification
Pressure amplification Flow characteristic, linear
Qα
∆ p
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Servo Valves
Flow characteristic
Control edge on spool sleeve
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Servo Valves
Flow characteristic, knee-shaped linear characteristicknee-shaped characteristi
Definition of flow characteristic
Valve with knee-shaped characteristic
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Servo Valves
Linearization of knee-shaped characteristic Rated flowrate
• • • • Q x = Qnomα
∆ Px ∆ Pnom
Asymmetrical characteristics
Linearization of knee-shaped characteristic
Asymmetrical characteristics
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Servo Valves
Dynamic response
-180 -160 -140 -120 -100 -80 -60 -40 -20 10
20
40 60 80 100
200
-0 300
Dynamic response of valve
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Servo Valves
Filtration grade
β Hysteresis, response sensitivity, range of inversion
Q
U Q
U Q
U Hysteresis, response sensitivity, and range of inversion of servo solenoid valve
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Servo Valves
Servo solenoid valves of sizes 6 and 10 Mechanical construction
Sizes 6 and 10 servo solenoid valves, directly actuated
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Servo Valves
Valve amplifier
• • • • 2.5 AF +24V= +UB +15V -15V 100k 100k 10k
Logic
A B C D E F
0V 0V
Supply Reference point Actual value spool value Setpoint0... 10V
Sign
Actual value spool value Protective earth Screening
+UB
PID
S U
Block diagram of sizes 6 and 10 directly actuated servo solenoid valves
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Servo Valves
Pilot-actuated Pilot-actuated sizes 10 and 16 servo solenoid valves Mechanical construction Inlet and outlet of hydraulic fluid Positions Valve amplifier
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Servo Valves
Pilot-actuated sizes 10 and 16 servo solenoid valves
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Servo Valves
) l V h 1 o 0 l t o 1 o r t p o a n s i p e o e e s … p l v u 0 e i t e t u c g l c a n v e i n n l i o a v t e o n a e t r p l r e e t u u e a e f P e u u r e c l S t a y l c l R A v c a S p A v p u S = V 4 2 + V V 0 0
o t t c e n n o c y t l o p n p o u D s ) V 1 0
n g i S
F A 5 . 2
A B C D E F k k 0 0 k 0 0 0 1 1 1
. p f f i m D a
C C D D
B V V U 5 1 5 1 + + -
B
U +
c i g o L
t e o g l a i t P s D I P
S U
S U
n e i a g a t M s D P
l a V n V 0 . 5 g 5 f 1 i 1 - e r + S 1 2 1 2 3 4
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Servo Valves
Block diagram of pilot-actuated sizes 10 and 16 servo solenoid valves
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Servo Valves
HRV valves General Features
• • • • •
High-response valves
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Servo Valves
y l p p u s e g a t s t u p t u O
= V 4 2 + F A 5 . 2
l a n g i S e l b a n E
y l l p t o n p o u e s p s m s … e e i 0 g c u n l t d o a e r n l i v t o l e w c l p a b o l t n e u e e u a k l S t c a n c E A v E a
V 0 1
h e t g r a a e s s g e e i n v i m t n r c e e e o t r r o c r r E P S
