Exhaust silencing device and non-road operation system

Abstract

The invention relates to the technical field of silencing and noise reduction, and discloses an exhaust silencing device and a non-road operation system. The exhaust silencing device comprises a shell, a silencing part and a blocking part. The shell is internally provided with a containing cavity, and the wall of the shell is provided with a gas inlet and a gas outlet for gas to enter and exit correspondingly. The silencing part is arranged in the containing cavity, and the silencing part is arranged to allow the gas to pass through and attenuate sound waves. The blocking part is arranged in the containing cavity, and the blocking part is arranged to be capable of slowing down the speed of the gas passing through the containing cavity. The exhaust silencing device is provided with the blocking part capable of slowing down the speed of the gas passing through the containing cavity, and therefore the exhaust back pressure and temperature of an exhaust system of an engine can be improved. By arranging the exhaust silencing device in the non-road operation system, the exhaust back pressure and temperature of the exhaust system of the non-road operation system can be improved, and the phenomenon that engine oil leaks out of the exhaust system is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of noise reduction and noise reduction, in particular to an exhaust noise reduction device and an off-road operation system. Background technique [0002] A muffler is usually provided in the engine exhaust system to reduce the noise generated when the engine exhausts. The muffler usually includes an outer cylinder and a sound insulation board arranged in the outer cylinder. The outer cylinder is provided with an air inlet and an air outlet, wherein the air inlet of the outer cylinder communicates with the air outlet of the engine combustion chamber. [0003] For off-road machinery and equipment, under low speed and low load conditions, the exhaust back pressure of the exhaust system of the engine with low power (power 8kw-56kw) is low, and the temperature and pressure in the engine cylinder are correspondingly low. The piston ring cannot reach the normal expansion state, so that there is a gap between the ...

AI Technical Summary

Problems solved by technology

[0003] For non-road operation machinery and equipment, under low speed and low load conditions, the exhaust back pressure of the exhaust system of the engine with low power (power 8kw-56kw) is low, and the temperature and pressure in the engine cylinder are correspondingly low. The piston ring cannot reach the normal expansion state, so there is a gap between the piston ring and the cylinder wall, so that the engine oil can easily enter the combustion chamber through the gap, but due to the low temperature of the combustion chamber, the engine oil cannot be fully burned here However, it is taken away by the exhaust gas and drips in the cabin and on the ground, causing excessive oil loss, shortening the maintenance cycle of the whole machine, and affecting the visual perception of the whole machine by customers

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