Exhaust gas recirculation cooler for medium and heavy-duty vehicle with ridge ring

Abstract

The invention relates to an exhaust gas recirculation cooler for medium and heavy-duty vehicles with ridge rings, comprising a pipe shell, two pipe plates arranged at two ends of the pipe shell, and a water inlet pipe and a water outlet pipe that are arranged on the side surface of the pipe shell; a plurality of heat exchanging pipes for circulating exhaust gas are arranged between two pipe plates at two ends of the pipe shell; two pipe plates are connected with an air inlet pipe box and an air outlet pipe box respectively; the pipe shell is enclosed by the metal plates with the thickness less than 2mm; the section of the pipe shell is a rectangle and the exterior thereof is also a rectangle; the pipe shell is connected by a single section or multi-sections; the total appearance length of the single-section pipe shell or the multi-section pipe shell is more than 1 time of the width or height; and the ridge rings are used for connecting the pipe shell and the air inlet pipe box or the air outlet pipe box and connecting all pipe shell sections of the multi-section pipe shell. The cooler connects the fission pipe shells and the pipe shell and the pipe box by ridge rings, thus leading the strength of the cooler to be increased and the structural design to be compacter, and improving the whole performance. As the cooler is provided with the ridge rings, the assembly difficulty is reduced and the processing precision is improved simultaneously.

Description

technical field [0001] The invention relates to an exhaust gas recirculation cooler for medium and heavy vehicles with a ridge ring, which is a heat exchanger applied to the exhaust gas recirculation cooling system of engines of medium and heavy vehicles. Background technique [0002] In the field of automobiles, the coolers for the engine exhaust gas recirculation cooling system are constantly improving to meet the increasingly stringent automobile exhaust emission standards; for medium and heavy diesel engines, the cost of exhaust gas recirculation coolers is higher than that of light diesel engines. Therefore, when designing and processing coolers for customers, not only their performance and reliability must be fully considered, but also the difficulty and cost of processing must be taken into consideration. [0003] The application of exhaust gas recirculation cooling technology is one of the effective measures to reduce vehicle exhaust emissions in the automotive indus...

AI Technical Summary

Problems solved by technology

Since the exhaust gas recirculation cooler is divided into two channels, the gas side and the water side, the high-temperature gas passes through the heat exchange tube, and the coolant of the engine passes through the tube shell. If there is leakage on the gas side, the coolant enters the heat exchange tube, thereby cooling If the filter enters the exhaust system, it will destroy the normal operation of the air circuit, resulting in damage to the engine; if there is a leak on the coolant side, that is, the coolant leaks into the environment through the connection between the tube shell and the water pipe, it will cause coolant leakage. The continuous loss of the engine will eventually cause the entire cooling system of the engine to lose its function, which will also cause great damage to the engine. Therefore, in order to avoid this situation, the overall strength and reliability of the cooler must be ensured

[0006] At present, in the exhaust gas recirculation coolers for medium and heavy diesel locomotives designed and produced in China, the tube shells are mostly made of castings, which makes the overall structure of the cooler relatively cumbersome and takes up a large space of the engine. The power density of this type of cooler Low, the heat exchange effect of the cooler per unit volume is not fully utilized, and the ability of this cooler to be upgraded is poor

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