At present, hydraulic excavator, as an important engineering machinery, is widely used in engineering construction and mining. Because of the high energy consumption and low efficiency of ordinary hydraulic excavator, domestic and foreign scholars and manufacturing enterprises put forward the energy saving principle of various hydraulic excavators
1. high performance hydraulic components are adopted to improve the performance of each component, which can reduce the throttling loss and improve the efficiency of hydraulic system.
2. develop energy saving hydraulic system, use new energy saving control and add energy regeneration and recovery, dynamic potential energy recovery and reuse system to improve the efficiency of the whole machine and reduce energy consumption.
3. power matching and hybrid power technology of the system, which can match the power of all links of the system to reduce energy consumption. Hybrid technology can help the engine work by motor or motor, and improve the fuel efficiency of engine.
The new technologies of hydraulic excavator are all based on diesel engine as power source. However, diesel engine has some disadvantages such as low energy utilization, serious pollution, high noise, poor speed regulation performance and high idle energy consumption. The existing technology can only improve the efficiency of the engine to some extent, and its efficiency can only reach about 45%. The power source efficiency of electrohydraulic excavator is high, clean and pollution-free, and it has the characteristics of low noise, low maintenance cost, energy saving and high efficiency.
