According to the source of impact energy, the hydraulic breaker hammer can be divided into three types: full hydraulic work hydraulic breaker hammer, gas-liquid combined work hydraulic breaker hammer and pure nitrogen work hydraulic crushing hammer. In either case, the force that provides piston reset is completely provided by hydraulic pressure.

Working Principle 0f Hydraulic Breaker Hammer With Full Hydraulic Power

Krupp and rammer are typical of this kind of hydraulic breaker hammer. The basic principle is that when the hydraulic breaker hammer is placed vertically downward in actual work, the piston is in the instantaneous pause stage at the end of the last stroke, and then the piston returns under the action of differential pressure. After reaching the position of the signal hole, the high-pressure oil at the high-pressure end of the piston enters the other end of the piston through the pipeline and then through the directional valve, Causes the piston to move in the opposite direction. When the piston crosses the position of the signal hole again, the high-pressure oil flows back through the pipeline to form the pressure difference again and start to move again. Through the movement of the piston and the cylindrical distribution valve, the on-off of each other's oil circuit is controlled mutually, so as to realize the high-speed reciprocating impact movement of the piston. It is also equipped with a high-pressure accumulator to supplement oil, stabilize pressure and buffer.

There is no difference in the large structure principle of this kind of products. Their main difference is those special detail structures, and these small structures play a very important role in improving product performance. Therefore, the design of these small structures has an important impact on improving product competitiveness.

Hydraulic Breaker Hammer With Gas-Liquid Combined Work

The structure of the hydraulic breaker hammer is more complex. During the stroke, both the high-pressure nitrogen at the rear end of the piston acts on the piston, and the rear cavity of the piston also acts on the high-pressure oil. The piston makes a rapid stroke movement under the combined action of high-pressure nitrogen and high-pressure oil. Therefore, the hydraulic breaker hammer of this structure generally has large impact energy. Most hydraulic breaker hammer in South Korea, Guhe in Japan and Jingtian in China are of this type.

Hydraulic Breaker Hammer With Pure Nitrogen

That is, the hydraulic breaker hammer with only nitrogen work in the impact stage, Shanxi Changzhi hydraulic breaker hammer is this type. Its basic working principle is as follows:

●  Return acceleration stage: the piston performs return acceleration under the action of high-pressure oil in the front chamber, and adiabatic compression of tail nitrogen at the same time.

●  Return braking stage: after the piston reaches the specified position, the valve core reverses and finally completely cuts off the oil supply.

●  Stroke acceleration movement: when the piston stops its return movement, it will immediately turn into stroke movement. At this time, the adiabatic expansion of nitrogen pushes the piston to accelerate.

●  Piston strike pause state: the piston will rebound at the initial speed after impact and start the next working cycle.