How to select the hydraulic hammer

The price of hydraulic hammer is affected by brand, category, specification, market and so on. Before choosing to buy, you need to understand and compare in many aspects. Hydraulic hammer is a substitute of traditional electro-hydraulic hammer. It is a new forging equipment with energy saving and environmental protection. The working principle is similar to that of electro-hydraulic hammer. After improvement, it can improve the strike frequency, reduce the oil temperature, prolong the service life, improve the quality of forgings and save a lot of energy.

 

Hydraulic hammer belongs to impact pile driving hammer, which can be divided into single action type and double action type according to its structure and working principle. The so-called single acting type means that the impact hammer core is quickly released after being lifted to a predetermined height by the hydraulic device, and the impact hammer core strikes the pile through a free fall; Double acting means that after the impact hammer core is lifted to a predetermined height through the hydraulic device, it obtains acceleration energy from the hydraulic system, improves the impact speed and strikes the pile. This also corresponds to two pile driving theories.

 

The single acting hydraulic pile hammer corresponds to the heavy hammer tapping theory, which has the characteristics of large hammer core weight, low impact speed and long hammering time. The pile hammer has a large penetration per blow, is suitable for pile types of various shapes and materials, and has a low pile damage rate, especially for concrete pipe piles. The double acting hydraulic pile hammer corresponds to the theory of light hammer and heavy driving. It is characterized by small weight of hammer core, high impact speed and short action time of hammer pile. It has large impact energy and is more suitable for driving steel pile.

 

After the bushing is replaced, the hydraulic crushing hammer stops working. It doesn’t strike when pressed down, and it will strike when lifted slightly. After replacing the bushing, the piston position is higher, resulting in the closing of some small directional valve control oil circuits in the cylinder at the starting position, the directional valve stops working and the crushing hammer stops working. The accumulator components in the pipe fall into the pipe. During the inspection, it was found that the deformed parts in the directional valve stuck the directional valve.

After the disassembly and inspection of the crushing hammer, other parts are found to be intact. When checking the directional valve, it is found that the sliding is astringent and easy to get stuck. After removing the change-over valve core, many strains may be found on the valve body. In the process of striking, the hydraulic crushing hammer gradually weakens, and then stops striking. Nitrogen quantity nitrogen pressure. If the pressure is too high, it can be hit after release. Stop hitting soon, and the pressure becomes higher after measurement. After disassembly, it was found that the upper cylinder was filled with hydraulic oil, and the piston could not be compressed backward, resulting in the failure of the crushing hammer.


Post time: Dec-07-2021