Research and technology of complex structure resistant muffler for wheel excavator

The noise sources of wheel excavators include intake noise, exhaust noise, fan noise, engine radiation noise and other parts vibration noise. Engine exhaust noise is one of the most important noise sources of construction machinery. Therefore, the design of muffler with good performance is particularly important. At present, the structure of reactive muffler used in construction machinery is generally a single expansion chamber muffler or resonant cavity muffler, which can only produce good effect on the low-frequency or high-frequency noise of the engine, but it is difficult to achieve good effect on the exhaust noise of construction machinery with full band noise.