Series connection type waste gas recycling cooler for medium and heavy duty vehicle

A technology of exhaust gas recirculation and cooler, which is applied in the direction of exhaust gas recirculation, machines/engines, and adding non-fuel substances to fuel, etc., to achieve the effects of reducing processing difficulty, reasonable layout, and improving overall performance

Active Publication Date: 2010-02-24
渭南美益特发动机减排技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design of the heat exchange tube assembly of the cooler, the relationship between the tube bundles is in series, the number of tube shells and tube bundles is not corresponding, the number of split tube shells is greater than or equal to the number of tube bundles; the design of the heat exchange tube ass

Method used

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  • Series connection type waste gas recycling cooler for medium and heavy duty vehicle
  • Series connection type waste gas recycling cooler for medium and heavy duty vehicle
  • Series connection type waste gas recycling cooler for medium and heavy duty vehicle

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example one:

[0027] This embodiment is a tandem exhaust gas recirculation cooler for medium and heavy vehicles, including: an intake pipe box 3 connected to an engine exhaust pipe, an exhaust pipe box 4 connected to an intake pipe of an engine exhaust gas recirculation system, and an intake pipe box At least two heat exchange tube body assemblies are connected to the exhaust pipe box through ridge rings. The heat exchange tube body assembly 1 connected to the air inlet pipe box is provided with a water inlet pipe 5 and a heat exchange tube connected to the air outlet pipe box. The body assembly 2 is provided with a water outlet pipe 6. The heat exchange tube assembly is connected by a heat exchange tube connector 21 that connects to the gas path, and is connected to the water path through a water path connector 7.

[0028] The heat exchanger described in this embodiment may have two heat exchange tube body assemblies, or may be composed of three, four or more heat exchang...

Example Embodiment

[0035] Embodiment two:

[0036] This embodiment is an improvement of the first embodiment. It is about the refinement of the heat exchange tube assembly, such as image 3 Shown. The heat exchange tube assembly described in this embodiment includes a tube shell 1 with a rectangular or circular cross-section surrounded by metal plates. The two ends of the tube shell opening are welded with end plates 8 respectively, and a circulating exhaust gas is installed between the two end plates. The multiple heat exchange tubes9.

[0037] The heat exchange tube assembly described in this embodiment is similar to a small heat exchanger, and also has a tube shell, heat exchange tubes and tube plates, but the tube plates are called end plates for the sake of distinction. The cross section of the heat exchange tube can have various shapes, which can be round, flat, oval, etc. The surface of the heat exchange tube may have inwardly recessed grooves to improve the heat exchange efficiency of the h...

Example Embodiment

[0040] Embodiment three:

[0041] This embodiment is a refinement of the second embodiment, and is a refinement of the second embodiment about the shell, such as Figure 4 , 5 Shown. The tube shell described in this embodiment is enclosed by two sections of metal plates connected by a ridge ring.

[0042] The shell can be made of one piece of metal plate or two metal plates, and the middle is directly welded or connected by a ridge ring or connected by a flange. In this embodiment, a ridge ring is used to connect the two tube shells 12 and 13. The ridge ring 14 described in this embodiment is a metal ring with a shape corresponding to the tube shell and with a step for inserting the end surface of the tube shell. The tube shell with ridge ring has the function of resisting thermal stress.

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PUM

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Abstract

The invention relates to a series connection type waste gas recycling cooler for a medium and heavy duty vehicle, which comprises a gas inlet pipe box, a gas exhaust pipe box, at least two heat exchange pipe assemblies, a water inlet pipe and a water outlet pipe, wherein the gas inlet pipe box is connected with a gas exhaust pipe of an engine; the gas exhaust pipe box is connected with a gas exhaust pipe of a waste gas recycling system of the engine; the heat exchange pipe assemblies are respectively connected with the gas inlet pipe box and the gas exhaust pipe box by ridge rings; the water inlet pipe is arranged on the heat exchange pipe assembly connected with the gas inlet pipe box; the water outlet pipe is arranged on the heat exchange pipe assembly connected with the gas exhaust pipebox; and the heat exchange pipe assemblies are connected by heat exchange pipe box connecting elements for connecting gas paths and connected with a water path by water path connecting elements. Theinvention can shorten the lengths of a single pipe shell and a pipe bundle by adopting the heat exchange pipe assemblies, and effectively solve the problem of thermal expansion of the pipe shell and the pipe bundle. The design has simple assembly process, reduces the machining difficulty, improves the machining precision, ensures the reliability of the cooler and standardizes and modularizes the design of a heat exchange pipe and the pipe shell, thereby improving the period of development and reducing the processing difficulty.

Description

technical field [0001] The invention relates to a series exhaust gas recirculation cooler for medium and heavy vehicles, which is a heat exchanger applied to the engine exhaust gas recirculation cooling system of medium and heavy vehicles. Background technique [0002] With the increasingly stringent automobile emission regulations, the application of coolers for engine exhaust gas recirculation cooling systems is becoming more and more extensive. The recirculation cooler needs continuous improvement to meet the requirements of use; for medium and heavy diesel locomotives, the cost of exhaust gas recirculation coolers is higher than that of light diesel locomotive coolers, and the processing is difficult. When manufacturing a cooler, not only its heat transfer performance and reliability must be fully considered, but also the ease of processing and cost must be taken into consideration. [0003] The exhaust gas recirculation cooler is an important component of the exhaust g...

Claims

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Application Information

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IPC IPC(8): F02M25/07F02M26/22F02M26/29
CPCY02T10/121Y02T10/12
Inventor 景建周汤俊洁沈董浩
Owner 渭南美益特发动机减排技术有限公司
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