Power cabin air duct structure and engineering vehicles

Abstract

The invention relates to a power compartment air duct structure and an engineering vehicle. The power compartment air duct structure comprises a hood fixed on a frame, wherein a sound absorbing material is pasted at the inner part of the hood, air inlets are formed in left and right sides of the front part of the hood, an air outlet is formed in the rear part of the hood, a blocking structure is arranged between the air inlets and a noise source, and the bottom of a power compartment is sealed. The blocking structure at the air inlets extends the propagation path of noise to prevent the internal noise caused by working of an engine, a cooling fan and the like from directly radiating to the outside through the air inlets; and in the process of transferring the noise to the air outlet at the rear part of the hood, the noise is reflected to the internal surface of the hood to be absorbed by the sound absorbing material to generate great attenuation, and residual noise is blocked by a sealing baffle plate so that little noise is radiated to the outside. Therefore, the whole power compartment air duct structure can effectively reduce the external noise of the engineering vehicle and the parotic noise of a driver so as to achieve the effects of sound insulation and noise reduction.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an air duct structure of a power cabin and an engineering vehicle. Background technique [0002] With the vigorous development of my country's construction machinery industry, construction machinery has spread all over the country's construction sites. While construction machinery improves work efficiency and reduces labor intensity of workers, the noise problem is becoming more and more prominent, and has become the most important source of noise in the urban environment. one. Especially for engineering vehicles, the engine and cooling fan inside the power cabin will radiate noise when they are working. Excessive noise will not only affect the normal life of residents near the construction site, but also work in an environment with excessive noise for a long time. It will damage the driver's hearing and make the driver fatigued during acceleration, thus posing a great threat...

AI Technical Summary

Problems solved by technology

[0004] The air duct design of this kind of power cabin is relatively simple. Although it can well realize the function of diverting air and make the cooling system achieve a good heat dissipation effect, the noise caused by the work of the engine and cooling fan passes through the meshed air inlet a1 and outlet. The air outlet a2 and the muffler cover a3 directly radiate out, and the sound-absorbing material inside the power cabin can't play the best effect, making the sound insulation and noise reduction effect of the engine cover poor

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