Abstract: Energy consumed by distribution valve causes an energy loss for the output energy of hydraulic breaker, which has a significant influence on its efficiency. A new type of distributon valve used for hydraulic breaker, designed to reduce energy consumption, is analyzed on the basis of the operating priciple and energy loss of the current diatribution valve .The new distribution valve adopts a cone valve and the optimzation technique of unequal open degree for the valve port. Theoretical caiculation and analyses have proven that the new distribution valve can reduce energy loss by 9.0127J ,or energy consumption by 31%, during an impact cycle and the efficiency of the hydraulic breaker can be raised by 4.5%. it has the followng characteristics: little leakage, little pressure loss and low energy consumption.
Key words: hydraulic breaker, distribution valve, energy loss
