A detailed explanation of the inner workings of an excavator hydraulic breaker.
Posted: Jan 6th, '25, 21:32
The relationship between the area A1 affected by the oil pressure in the upper chamber of the cylinder and the area A2 affected by the oil pressure in the lower chamber of the cylinder is A1>A2, and A2 is always under high pressure. When A1 changes from being under high pressure to being under low pressure, the piston moves upward, accompanied by the high-pressure nitrogen in the rear cylinder being pressurized and storing energy.
1. Piston upward
Initial situation: The piston and valve are both at their lower end positions. The upper chamber of the cylinder is under low pressure, and the lower chamber of the cylinder and the high-pressure chamber of the valve are always under high pressure. The low-pressure chamber connected to the oil return port is always in a low-pressure state. The low-pressure chamber is connected to the cylinder conversion chamber. At this time, A5 connected to the cylinder conversion chamber is under low pressure, so the cylinder conversion chamber is under low pressure before the piston moves upward.
Because areas A3 and A4 are under high pressure (A3>A4), the valve is under downward force before A5 is under high pressure. High-pressure oil enters the lower chamber of the cylinder to make the piston rise. When the piston starts to move upward, the oil pressure in the piston conversion chamber does not change. When the piston moves upward, the high-pressure nitrogen is pressurized.
2. Valve upward
When the piston moves to the middle, the cylinder conversion chamber is connected to the lower chamber, so the cylinder conversion chamber is subjected to high pressure. A3, A4, and A5 are all subjected to high pressure, and their area relationship is A4+A5>A3. In this way, the valve is subjected to an upward force. The valve moves upward under the force. When the piston stops moving, the high-pressure nitrogen storage reaches the maximum.
3. Piston downward
When the piston moves upward, the piston conversion chamber is connected to the high-pressure chamber in the valve, so that the upper chamber of the cylinder becomes subjected to high pressure. Both the upper and lower chambers are subjected to high pressure, and A1>A2, the piston is subjected to a downward force. On the other hand, the high-pressure nitrogen is compressed to give the piston a downward force, so that the piston moves downward rapidly.
4. Valve downward
Before this, the piston hits the drill rod, and the cylinder conversion chamber is connected to the low-pressure chamber, so that A5 is subjected to low pressure. A3 and A4 are subjected to high pressure, A3>A4, so the valve moves downward.
5. Piston operation
When the valve moves downward, the piston hits the drill rod. When the piston hits the drill rod, the piston starts to move upward. The hydraulic hammer repeats ⑴-⑵-⑶-⑷-⑸ in sequence to complete the work.
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1. Piston upward
Initial situation: The piston and valve are both at their lower end positions. The upper chamber of the cylinder is under low pressure, and the lower chamber of the cylinder and the high-pressure chamber of the valve are always under high pressure. The low-pressure chamber connected to the oil return port is always in a low-pressure state. The low-pressure chamber is connected to the cylinder conversion chamber. At this time, A5 connected to the cylinder conversion chamber is under low pressure, so the cylinder conversion chamber is under low pressure before the piston moves upward.
Because areas A3 and A4 are under high pressure (A3>A4), the valve is under downward force before A5 is under high pressure. High-pressure oil enters the lower chamber of the cylinder to make the piston rise. When the piston starts to move upward, the oil pressure in the piston conversion chamber does not change. When the piston moves upward, the high-pressure nitrogen is pressurized.
2. Valve upward
When the piston moves to the middle, the cylinder conversion chamber is connected to the lower chamber, so the cylinder conversion chamber is subjected to high pressure. A3, A4, and A5 are all subjected to high pressure, and their area relationship is A4+A5>A3. In this way, the valve is subjected to an upward force. The valve moves upward under the force. When the piston stops moving, the high-pressure nitrogen storage reaches the maximum.
3. Piston downward
When the piston moves upward, the piston conversion chamber is connected to the high-pressure chamber in the valve, so that the upper chamber of the cylinder becomes subjected to high pressure. Both the upper and lower chambers are subjected to high pressure, and A1>A2, the piston is subjected to a downward force. On the other hand, the high-pressure nitrogen is compressed to give the piston a downward force, so that the piston moves downward rapidly.
4. Valve downward
Before this, the piston hits the drill rod, and the cylinder conversion chamber is connected to the low-pressure chamber, so that A5 is subjected to low pressure. A3 and A4 are subjected to high pressure, A3>A4, so the valve moves downward.
5. Piston operation
When the valve moves downward, the piston hits the drill rod. When the piston hits the drill rod, the piston starts to move upward. The hydraulic hammer repeats ⑴-⑵-⑶-⑷-⑸ in sequence to complete the work.
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com