How Can The Hydraulic System of A Rotary Drilling Rig Save Energy

As the "underground giant" in pile foundation construction, the hydraulic system of the rotary drilling rig is the core of power transmission, with energy consumption accounting for more than 60% of the entire machine. Optimizing the energy efficiency of the hydraulic system can not only reduce construction costs but also cut carbon emissions, which is a key link in the green development of construction machinery.

1. Precise load sensing matching: By adopting load sensing technology, the hydraulic pump can adjust the flow and pressure in real time according to the load of the drill bit, avoiding energy waste caused by "a big horse pulling a small cart". After XCMG XR400D applied this technology, the system efficiency increased by 15% to 25%.

2. Intelligent power regulation: The power matching system based on CAN bus can dynamically coordinate the output of the engine and the hydraulic pump. Through 10-speed subdivision control, the power utilization rate of the diesel engine is maximized, and fuel consumption is reduced by 10% under the same working conditions.

3. Energy recovery and reuse: During the rotary braking and the lowering of the drill pipe, the accumulator can recover the hydraulic energy and release it for the second time. With this technology, Yutong's electric rotary drilling rig, in combination with direct motor drive, achieves an energy recovery rate of 20% to 30%.

4. Flow control optimization: The combination of positive flow and negative flow control technologies reduces the throttling loss of hydraulic oil in the pipeline. After adopting the positive flow system, the hydraulic loss of Sany SR165 was reduced by 8%, and the overall energy saving exceeded 15%.

5. Temperature control and idle speed management: The independent cooling system can adjust the fan speed according to the oil temperature to avoid unnecessary energy consumption. The automatic idle function reduces the engine speed 30 seconds after the machine stops, further reducing idling waste.

6. Electro-hydraulic integration innovation: Electric models use power transmission to replace part of the hydraulic pipelines. The energy utilization rate of Yutong's pure electric rotary drilling rig reaches 83%, saving 70% to 80% of energy compared to traditional models, providing a new path for energy conservation in hydraulic systems.

Conclusion: The energy-saving breakthrough of the hydraulic system of rotary drilling RIGS requires a three-pronged approach of "precise matching, recycling and reuse, and intelligent regulation and control". By integrating hydraulic technology with electronic control and in line with the trend of electrification, the energy consumption of the entire machine is expected to be reduced by another 30% in the future, injecting core impetus into the low-carbon transformation of infrastructure projects.