A16-F-R-00-H-S-K-A200-32408柱塞泵资料.pdf - 第5页

29 PIST ON PUMPS A Series A Series V ariable Displacement Piston Pumps PL PH M O M O M O M O 2 i 1 i PL PH M O QH QL PL PH SOL"OFF" SOL"ON" Pressure Output Flow Pressure Output Flow (S Input Voltage L…

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28
A
Series Variable Displacement Piston Pumps
“A16” type performance characteristics
OUT
IN
Control Piston
Drain Port
Pivot
Shaft
Yoke
Swash Plate
Slipper Retainer
Spring, Yoke Return
Piston Ass'y
Cylinder Block
Port Plate
Flow Adj. Screw
Pressure Adj. Screw
Spool
A
Series Variable Displacement Piston Pumps
■ Features
● High efficiency
The efficiency properties in case of “A16”from are high
efficiencies to be shown below.
● Accomplishment of energy-saving
Because the overall efficiency is high and the cut-off
characteristics is sharp, thus the input power may be saved.
● Low noise level
In the “A16” pump, the noise level is as low as 57.3 dB(A)
[at the full cut-off pressure 21 MPa with speed 1500 r/min
one metre horizontally away from pump head cover.]
● Low heat generation
Because of small power loss, it is possible to reduce the rise
in oil temperature. Accordingly, capacity of a reservoir can
be reduced.
0
0
4
8
3
12
16
6
20
24
9
28
32
12
20
40
60
80
100
0 4 8 12 16 20
21
N＝1800r/min
40
50
60
70
80
N＝1500r/min
0 4 8 12 16 20 21
Volumetric Efficiency
Overall Efficiency
Output Flow
Input Power
Output Flow
L/min
Input Power kW
Pressure
MPa
Efficiency
%
Pressure MPa
Noise Level dB(A)
Full Cut-off
29
PISTON PUMPS
A Series
A
Series Variable Displacement Piston Pumps
PL PH
M
O
M
O
M
O
M
O
2
i
1
i
PL
PH
M
O
QH
QL
PL PH
SOL"OFF"
SOL"ON"
Pressure
Output Flow
Pressure
Output Flow
(S Input Voltage L)
(S Input Voltage L)
Pressure
Output Flow
(S
Input Current
i
L)
(S Input Current
i
L)
1
2
SOL
"OFF"
SOL
"ON"
Output Flow
PL PH
SOL
"OFF"
SOL
"ON"
Pressure
Output Flow
Pressure
Output Flow
Pressure
PL
PH
M
O
PL
PH
QH
QL
Pressure
Output Flow
M
O
■ Control Type
Control Type Graphic Symbols Performance Characteristics Explanation Page
"01"
Pressure
Compensator
Type
When the system pressure increases and comes close
to the preset cut-off pressure, the pump flow decreases
automatically while maintaining the set pressure as it
is.
31
"02"
Solenoid-two
Pressure
Control
Type
This type of control is ideal for an application where
the output power of the actuator has to be controlled
in two different load pressures while keeping the
actuator speed nearly constant.
53
"03"
Pressure
Compensator
with
Unloading
Type
It is suitable for a situation where a long unloading
time is required and heat generation and noise have
to be kept at their lowest levels.
•
The pump can be used in combination with the
multistage pressure control valve.
61
"04"
Proportional
Electro-
Hydraulic
Load
Sensing
Type
This is an energy-saving type control which regulates
the pump flow and load pressure to be at absolute
minimum necessary level to operate the actuator.
Pump flow rate and cut-off pressure are controlled
proportional to the input current to the control device
on the pump and the input current is regurated by the
specific amplifier.
62
"04E"
Electro-
Hydraulic
Proportional
Pressure &
Flow
Control
Type
This type of control has the pressure sensor and tilt
angle sensor in the pump. The pump is used with the
external amplifier (amplifier is integrated into pump
in case of "04EH").
Flow and pressure can be controlled in proportion to
input voltage by only one control valve.
The features has been greatly improved by electrical
feedback of swash plate tilt angle correspond to flow
rate and load pressure to control valve.
•
Linearity of input characteristics is excellent and
easy to set.
•
Hysteresis is lower, repeatability and reproducibility
are fine.
72
"04EH"
Electro-
Hydraulic
Proportional
Pressure &
Flow
Control
Type
(OBE Type)
82
"05"
Two-Pressure
Two-Flow
Control Type
by System
Pres.
This type of control is suitable for an application like
"Presses" where the changeover from rapid advance to
feed is required just when the pressing (pressurizing)
starts.
91
"06"
Two-Pressure
Two-Flow
Control Type
by Solenoid
Valve
This pump control is suitable for machining found
on machine tool, where machining starts after the
changeover from rapid advance, to feed has been
made.
92
30
A
Series Variable Displacement Piston Pumps
M
O
M
O
Pressure
Output Flow
Pressure
Output Flow
Output Flow
Input Power
QH
QL
QH
QL
PL PH
Pressure
 
→
OutputFlow
 
→
■ Control Type
Control Type Graphic Symbols Performance Characteristics Explanation Page
"07"
Pilot Pressure
Control Type
Pressure
Compensator
The pump is used in combination with the pilot relief
valve or multistage pressure control valve. By
controlling the pilot pressure, the full cut-off pressure
can be remote-controlled according to your
requirements.
93
"09"
Constant
Power
Control Type
•
Pump input power can be controlled in accordance
with the motor output.
•
When the discharge pressure rise, the output flow
decreases corresponding to the preset input power.
•
The pump can act for function of two pumps, low-
pressure large-flow and high-pressure small-flow.
Therefore, the motor capacity can be reduced.
101
"00-
Z500"
Simple Two-
Pressure
Two-Flow
Control Type
•
This type of control enables one pump to act as two
pumps (low-pressure and large-flow/high-pressure
and small-flow-rate). Therefore, the motor capacity
can be reduced.
•
When the system pressure increases near the preset
“PL” pressure due to the load increase, the pump
flow automatically decreases to “QL.”
•
This type of control is suitable for an application
like the press, where switching from rapid
advance to feed is required just when the press
(pressurizing) starts.
•
The PH pressure can be remote-controlled with a
separately located relief valve. With this type of
control, it is easy to change the applied pressure
setting when materials or shapes of the press are
changed.
109
■ Availability of Control Type
Mark "○" in the table below refers to standard model.
Model
Numbers
Geometric
Displacement cm
3
/rev
Control Type
01 02 03 04 04E 04EH 05 06 07 09 00-Z500
A10 10.0
○ ○
A16 15.8
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
A22 22.2
○ ○ ○ ○ ○ ○ ○ ○
A37 36.9
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
A45 45.0
○ ○
A56 56.2
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
A70 70.0
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
A90 91.0
○ ○ ○ ○ ○ ○ ○ ○ ○
A100 100
○ ○ ○
A145 145
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
A220 219
○ ○ ○ ○