STRUCTURE
AND
FUNCTION
Contents:
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What is NPK?
What is a Hydraulic Hammer?
How does a hydraulic hammer work?
What are the parts of a Hydraulic Hammer?
How install a Hydraulic Hammer?
How to maintain a Hydraulic Hammer
Nippon Pneumatic Kogyo Ltd.
Nippon Pneumatic Kogyo Ltd.
NIPPON
-
PNUEMATIC –
KOGYO –
Nippon Pneumatic Kogyo Ltd.
NIPPON
-
PNUEMATIC –
KOGYO –
“JAPANESE”
Nippon Pneumatic Kogyo Ltd.
NIPPON
-
PNUEMATIC –
KOGYO –
“JAPANESE”
A system or equipment that utilizes air as a
medium.
Nippon Pneumatic Kogyo Ltd.
NIPPON
-
“JAPANESE”
PNUEMATIC –
A system or equipment that utilizes air as a
medium.
KOGYO –
“MANUFACTURER”
Nippon Pneumatic Kogyo Ltd.
NIPPON
-
“JAPANESE”
PNUEMATIC –
A system or equipment that utilizes air as a
medium.
KOGYO –
“MANUFACTURER”
What is a Hydraulic Hammer?
What is a Hydraulic Hammer?
It is an “attachment” used in a Hydraulic Excavator to change its main purpose.
What is a Hydraulic Hammer?
It is an “attachment” used in a Hydraulic Excavator to change its main purpose.
Which is most commonly and popularly known as
What is a Hydraulic Hammer?
It is an “attachment” used in a Hydraulic Excavator to change its main purpose.
Which is most commonly and popularly known as
BREAKER
What is a Hydraulic Hammer?
It is an “attachment” used in a Hydraulic Excavator to change its main purpose.
Which is most commonly and popularly known as
BREAKER
Parts of an
Breaker
 Hydraulic Oil pressure is fed in the “IN”
Port then goes to C2 chamber.
 The pressure causes the piston to move
upwards.
 (As the piston moves upward, the Precharged Nitrogen is being compressed)
 As the piston has been travelling upward by the
Hydraulic Oil pressure fed in the “IN” port.
 Soon, pressure will be initiated to the sensing
port ( the small oil port), this pressure will be
acting in the surface area of the main valve.
 That signal pressure will initiate movement of
the main valve to go upward.
 Since the MAIN VALVE has been pushed upward
by the signal pressure, this causes hydraulic
pressure in the chambers: C2 and C1 to
equalized.
 Equalization takes place in the opening of the
main valve, allowing oil from C2 going to C1.
 Since the compressed NITROGEN counteracts
the pressure, it pushes the piston DOWN.
 Since the piston is moving DOWNWARD,
the pressure in the SIGNAL PORT weakens,
causing the MAIN VALVE to begin to LOWER
 The pressure in the chambers : C1 and C2
becomes equal, the piston is now pushed
DOWNWARD by the NITROGEN pressure.
 Since the piston is moving DOWNWARD,
the pressure in the SIGNAL PORT weakens,
causing the MAIN VALVE to begin to LOWER
 The pressure in the chambers : C1 and C2
becomes equal, the piston is now pushed
DOWNWARD by the NITROGEN pressure.
* note: 00:50 – 2:35
When the
Hammering
Force is Weak
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact Energy.
Relation between Pre-charge Pressure of
Nitrogen Gas and Impact Energy
Relation between Pre-charge Pressure of
Nitrogen Gas and Impact Energy
Relation between the charged
pressure of nitrogen gas and
hammering frequency
1.-1 The oil flow of the carrier
determines frequency.
1.-2 Change in the gas pressure
influences frequency, due to change
in the oil volume.
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
The gas pressure is too low.
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
Weak impact
The gas pressure is too low.
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
Weak impact
The gas pressure is too low.
No hammering
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
Weak impact
The gas pressure is too low.
No hammering
The gas pressure is too high.
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
Weak impact
The gas pressure is too low.
No hammering
The gas pressure is too high.
Relation between Pre-charge
Pressure of Nitrogen Gas and
Impact energy and Frequency
Weak impact
The gas pressure is too low.
No hammering
The gas pressure is too high.
Low frequency
Tools
NITROGEN
Tank/ Barrel
4) Rotate the cap to the arrow
direction so that to be locked.
Cap
4) Rotate the cap to the arrow
direction so that to be locked.
Cap
5) While rotating the handle, once the
rotation should get tight. Keep rotating,
then the charged pressure will be
indicated on the pressure measure.
4) Rotate the cap to the arrow
direction so that to be locked.
5) While rotating the handle, once the
rotation should get tight. Keep rotating,
then the charged pressure will be
indicated on the pressure measure.
Cap
OK!
• Check Items before
Installation
Stop valve (OUT)
Stop valve (IN)
Hose
Hose
Valve Set-up