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Diesel engine high temperature gas seal structure

A sealing structure, diesel engine technology, applied in exhaust devices, mechanical equipment, engine components, etc., can solve problems such as difficulty in meeting special vehicles and low sealing reliability

Active Publication Date: 2013-07-10
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Special vehicles require high-temperature gas sealing reliability to reduce the probability of being hit in battle and improve the battlefield survivability of special vehicles. However, the general high-temperature gas sealing structure has low sealing reliability and is difficult to meet the needs of special vehicles.

Method used

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  • Diesel engine high temperature gas seal structure

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Embodiment Construction

[0012] When the high-temperature gas passes through the connection between the exhaust pipe and the intubation pipe, both the exhaust pipe and the intubation pipe will be heated and expand. If the thermal expansion coefficients of the exhaust pipe and the intubation pipe are different, high-temperature exhaust gas leakage will easily occur. The upper exhaust pipe 1 and the lower exhaust pipe 2 are made of the same material to ensure that the exhaust pipe and the intubation tube have the same coefficient of thermal expansion.

[0013] It is further preferred that the material of the exhaust pipe and the cannula is medium silicon ferritic cast iron QTSi-4.6.

[0014] In order to further reduce leakage and improve sealing reliability, a sealing ring groove is preferably designed on the intubation tube, and a sealing ring is arranged in the sealing ring groove.

[0015] Preferably, two sealing ring grooves are respectively designed at both ends of the cannula.

[0016] A double l...

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Abstract

The invention relates to a diesel engine high temperature gas seal structure which comprises an upper exhaust pipe section, an intubation tube, a lower exhaust pipe section and sealing rings. The seal structure can realize high gas seal with parts as few as possible and improve the reliability of high temperature gas seal to further improve the work reliability of a vehicle.

Description

technical field [0001] The invention belongs to the technical field of diesel engines, and in particular relates to a high-temperature gas sealing structure of a diesel engine. Background technique [0002] The diesel engine exhaust system is responsible for discharging the exhaust gas after combustion of the internal combustion engine. At the same time, it bears the scour of constantly changing high temperature and high pressure gas, as well as the impact and vibration of the whole engine, and the parts are prone to deformation, air leakage and other problems. If there is a gas leak in the exhaust system, the light one will cause the pollution of the power cabin, and the serious one will cause serious failures such as fire in the power cabin, causing immeasurable losses to the entire vehicle. [0003] The general high-temperature gas sealing structure of diesel engines includes exhaust pipe section, intubation, and the intubation sealing ring structure of the sealing ring, ...

Claims

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Application Information

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IPC IPC(8): F01N13/08
Inventor 王增全王连春张国征崔艳军牛军
Owner CHINA NORTH ENGINE INST TIANJIN
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