Instron 1000KPX-J3, Руководство по концепции системы

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Chapter 3: Additional System Details
46 M47-17036-EN
Lifts and locks manifold assembly
When the frame is equipped with a J3-style crosshead, a lifts and locks manifold assembly is provided.
The manifold is located in the control unit that is mounted to the frame. It contains needle valves for
operator control of the lift and lock cylinders, needle valves for control of lift cylinder speed, and pressure
relief valves. Procedures for operation of the needle valve controls is provided in the System Operating
Instructions (supplied separately). Oil is routed, at the appropriate pressure, from the HPS, through the
frame manifold (located on the frame base) to the lifts and locks manifold.
Lock cylinder pressure switch
When the frame is equipped with a J3-style crosshead, the hydraulic system includes a pressure switch
that detects hydraulic pressure at the lock cylinders. This pressure switch is located at the crosshead. If
the pressure falls below a set pressure, the switch is tripped which sends a signal to the controller that
the crosshead is unclamped. When this is the case, the system controls will not permit operation of the
frame to jog the hydraulic cylinder or run a test until the crosshead is locked. The switch also sends a
signal to the HPS causing the pump to increase hydraulic pressure so that the lift and lock cylinders can
be operated. Once the crosshead is positioned and the locks control valve is closed, the pump will reduce
to idle pressure when the switch senses that the appropriate clamp pressure is reached.
Pressure settings
All relief valves, reducing valves, pressure switches, etc. are set at the factory to their proper operating
pressure. They should not need further adjustment. If you feel adjustment is necessary, contact your
local Instron Services department as directed on page
14 . Any adjustments should only be made by an
Instron service engineer.
Oil cooling
An air-over-oil heat exchanger and fan (1, Figure 19 ) are used to cool the oil and exhaust the warm air
from the console. The fan is mounted to the rear cover and has a guarded vent hole. Fresh air is drawn
into the console through a guarded vent hole on the side of the console. This vent hole is equipped with a
filter.