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Waste gas inlet end structure of EGR (Exhaust Gas Recirculation) cooler

一种EGR冷却器、进气端的技术，应用在废气再循环、换热器、换热器外壳等方向，能够解决波纹管隔热管失效等问题，达到提高抗振动性能、降低壁面温度、提高可靠性的效果

Inactive Publication Date: 2012-10-17
ZHEJIANG YINLUN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the bellows are designed for the intake pipe of the general EGR cooler, only one end of the heat insulation pipe lined with the intake pipe is fixedly connected to the intake pipe. tube failure

Method used

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  • Waste gas inlet end structure of EGR (Exhaust Gas Recirculation) cooler
  • Waste gas inlet end structure of EGR (Exhaust Gas Recirculation) cooler
  • Waste gas inlet end structure of EGR (Exhaust Gas Recirculation) cooler

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Embodiment Construction

[0024] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings.

[0025] refer to figure 1 and figure 2 , an exhaust gas inlet structure of an EGR cooler of the present invention, comprising a water housing 3, an air intake pipe 9, a corrugated pipe 8, an insulating pipe 10, an air inlet chamber 6, a pre-cooling water chamber 7 and a main board 5, the described The water casing 3 is provided with a water inlet pipe 2 , and the water casing 3 is provided with a heat dissipation core 4 , and one end of the heat dissipation core 4 is connected with the main board 5 . The air intake pipe 9, the corrugated pipe 8, the pre-cooling water chamber 7 and the water shell 3 are sequentially connected by brazing or argon arc welding. The heat insulation pipe 10 is placed in the bellows 8, one end is welded to the air intake pipe 9, and the other end is suspended. The air intake chamber 6 is a two-stage variable-diame...

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PUM

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Abstract

The invention discloses a waste gas inlet end structure of an EGR (Exhaust Gas Recirculation) cooler. The waste gas inlet end structure comprises a water shell, a gas inlet pipe, a corrugated pipe, an gas inlet chamber of a heat insulation pipe, a pre-cooling water chamber and a main plate, wherein the water shell is provided with the water inlet pipe. The waste gas inlet end structure is characterized in that the heat insulation pipe is arranged in the corrugated pipe; one end of the corrugated pipe is connected with the gas inlet pipe and the other end of the corrugated pipe is suspended; the large-diameter end of the gas inlet chamber is connected with the main plate to form the gas inlet chamber, and a cooling liquid channel is formed between the water shell and a jointing part between the gas inlet chamber and the main plate; the outer surface of a middle pipe body is connected with the end part of the corrugated pipe to form the pre-cooling water chamber; and the small-diameter end of the gas inlet chamber is contacted with the outer surface of the middle part of the heat insulation pipe. The waste gas inlet end structure of the EGR cooler has the advantages that by virtue of the added pre-cooling water chamber, temperatures of the wall faces of the main plate and the gas inlet chamber are reduced; a support is additionally arranged in the middle of the heat insulation pipe, so that the anti-vibration performance of the heat insulation pipe is improved; and by virtue of a special structure of the gas inlet chamber, an inner axial heat expansion displacement compensation capability of the EGR cooler is improved. By virtue of the improvement, the reliability of the EGR cooler is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, and relates to an improved structural form and improved structural reliability of an engine exhaust gas recirculation cooler, in particular to an exhaust gas intake end structure of an EGR cooler. Background technique [0002] Exhaust gas recirculation technology is one of the main technical routes for engines to achieve emissions above China 4. Before the exhaust gas recirculation enters the engine cylinder, it needs to be cooled to a certain temperature by the exhaust gas recirculation cooler (referred to as: EGR cooler). The working temperature of the high-temperature exhaust gas on the hot side of the EGR cooler is generally between 120°C and 730°C, and the temperature of the coolant on the cold side is between 80°C and 120°C. Therefore, during the working process of the EGR cooler, the temperature of the wall surface of the cooling pipe is high, and the longitudinal thermal expansio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/07
CPCF02M25/0726F28F9/02F02M25/07Y02T10/121F28D7/00F28D7/16F28D21/0003F28F9/0239F28F2009/0295F28F2265/26F02M26/13F02M26/32Y02T10/12
Inventor 张文锋覃小军赵优琪刘浩
Owner ZHEJIANG YINLUN MACHINERY
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