Synchronizing with Double Rod End Cylinders

1
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, At Rest
2
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Extending
3
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
4
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
5
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
6
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
7
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
8
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
9
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
10
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
11
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Extending
12
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Extending
13
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
14
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
15
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
16
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
17
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
18
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
19
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
20
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
Hydraulic Cylinders Series Circuit, Retracting
21
Synchronizing with Double Rod End Cylinders
If the Cylinders get out of sync as they cycle
they will be re-synchronized as they return to a
positive stop or end of stroke
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Retracting
22
Synchronizing with Double Rod End Cylinders
When one Limit Switch is made first it energizes
Solenoid c and sends pump flow to fully retract
both Cylinders
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Retracting
23
Synchronizing with Double Rod End Cylinders
When one Limit Switch is made first it energizes
Solenoid c and sends pump flow to fully retract
both Cylinders
Limit Switch
Limit Switch
PG2
c
Counter Balance Valve
150 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Retracting
24
Synchronizing with Double Rod End Cylinders
When one Limit Switch is made first it energizes
Solenoid c and sends pump flow to fully retract
both Cylinders
Limit Switch
Limit Switch
PG2
c
Counter Balance Valve
150 PSI
PG1
0 PSI
a
b
2,000 PSI Maximum
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Retracting
25
Synchronizing with Double Rod End Cylinders
Limit Switch
Limit Switch
Limit Switch
c
PG2
Counter Balance Valve
450 PSI
PG1
1,250 PSI
a
b
2,000 PSI Maximum
(Next Slide)
Hydraulic Cylinders Series Circuit, Stopped
26
Series Cylinder Synchronizing Variations
Requires the same makeup and re-synchronizing
valves
Requires same Counter Balance Valves for running
away loads
To Directional Valve
Synchronizing Single Rod Cylinders, At Rest
(Next Slide)
27
Series Cylinder Synchronizing Variations
Requires two makeup and re-synchronizing valves
Requires same Counter Balance Valves for running
away loads
To Directional Valve
Synchronizing Single Rod Cylinders, At Rest
(Next Slide)
28
Synchronizing with Cylinders in Series

• Only works with Hydraulic cylinders

• Requires added valves to re-synchronize at end of
  stroke

• Can be mid stroke stopped without special valves

• Must have bleed ports to assure filling of
  trapped fluid area

• Requires extra space for second rod travel

• Each cylinder must have enough force to do the
  work required by itself

• When used for multiple cylinder applications each
  added cylinder will lag slightly due to
  compressibility of fluid

(Repeat) (Escape to Quit)