1. The frequency modulation range becomes larger
Products in the early 1990s relied on changing the throttle size of the engine to achieve a change in frequency. Not only that, but also the vibration frequency can be precisely controlled by adjusting the displacement of the hydraulic pump. It makes it easier for the operator to find a frequency that makes the piles resonate, so as to reduce the soil friction, obtain the maximum pile sinking speed, and improve the working efficiency.
2. Increased amplitude modulation
Mainly used for large pile hammers, the purpose is to improve work efficiency. There is an objective amplitude in the soil. If the amplitude is greater than the objective value, the soil fluidizes and the pile sinking speed increases. Using this principle, adjust the amplitude at the right time to get the maximum sinking speed.
With the development and application of new technologies, drilling machines have developed rapidly in recent years. Highlighted in the following two aspects:
1. One machine
A breakthrough in structural design, as long as the drilling tool is replaced, the machine can have the functions of a spiral, a rotary bucket, a continuous wall, a long spiral and a grab grab drill.
2. Application of electronic and electro-hydraulic proportional technology
The application of electronic and electro-hydraulic proportional technology expands the functions of the machine, improves work efficiency and reduces labor intensity.