EGR cooler

Abstract

The utility model discloses an EGR cooler which comprises a shell, an air inlet chamber is arranged on one side of the shell, an air inlet flange is arranged on the air inlet chamber, and an air outlet flange is arranged on the side, opposite to the air inlet chamber, of the shell. The shell comprises a first split shell and a second split shell, and the air outlet flange is arranged on one side of the second split shell; a plurality of cooling pipe openings are formed in the first split type shell and the second split type shell respectively, a cooling pipe is arranged between every two adjacent cooling pipe openings, a water inlet pipe used for connecting cooling liquid is arranged on the second split type shell, and a water outlet pipe used for discharging the cooling liquid is arranged on the first split type shell; fins used for conducting heat exchange on high-temperature flue gas are arranged on the inner wall of the cooling pipe. According to the utility model, a split shell mechanism is adopted, and a plurality of cooling pipe orifices are arranged in the split shell, so that the parts of the cooler are simplified and the stability of the cooler is improved on the premise that the cooling function is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of engine emission, and more specifically to an EGR cooler. Background Art

[0002] The EGR module is an important component in modern vehicle engines that can effectively reduce pollutant emissions. It is mainly composed of an EGR valve, EGR cooler, bypass valve, valve seat and rubber hose, etc. It is mainly used to reduce NO in exhaust gas. X emissions.

[0003] When the engine is working, the temperature and pressure in the combustion chamber are very high, and a large amount of NO will be generated under high temperature and high pressure. X , especially during forced acceleration. When the engine is running under load, the EGR valve opens, and a small amount of exhaust gas enters the intake pipe and enters the combustion chamber together with the combustible mixture. When the engine is idling, the EGR valve is closed, and almost no exhaust gas is recirculated to the engine. Since automobile exhaust gas is a non-combustible gas, it does not participate in combustion in the combustion chamber. It absorbs part of the heat generated by combustion to reduce the combustion temperature and pressure to reduce NO X The amount of generation.

[0004] The EGR cooler is an important component in the EGR module. It is a device used to cool part of the exhaust gas returned to the engine cylinder. The structure of the commonly used EGR cooler currently includes: a shell, a main board, a cooling pipe, an air intake flange, an air intake chamber, an air outlet flange, a water inlet pipe, a water outlet pipe, a mounting bracket, and a fixed bracket. There are many parts, and the structure of the cooler is relatively complicated. In addition, it is difficult to ensure the stability of the cooler by using the main board for heat exchange cooling. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an EGR cooler, simplify the structure of the cooler and improve the stability of the cooler.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0007] An EGR cooler comprises a shell, an air inlet chamber is arranged on one side of the shell, an air inlet flange for receiving high-temperature flue gas is arranged on the air inlet chamber, and an air outlet flange for connecting to an engine pipeline is arranged on the shell on the side opposite to the air inlet chamber; the shell comprises a first split shell connected to one side of the air inlet chamber and a second split shell connected to the first split shell, and the air outlet flange is arranged on one side of the second split shell; a plurality of cooling pipe openings are respectively arranged in the first split shell and the second split shell, and cooling pipes are arranged between adjacent cooling pipe openings, a water inlet pipe for receiving coolant is arranged on the second split shell, and a water outlet pipe for discharging coolant is arranged on the first split shell; fins for exchanging heat with high-temperature flue gas are arranged on the inner wall of the cooling pipe.

[0008] To further optimize the technical solution, a mounting bracket for mounting the cooler on the engine is provided on the first split housing.

[0009] To further optimize the technical solution, a fixing bracket for mounting the cooler on the engine is provided on the second split housing.

[0010] To further optimize the technical solution, the first split housing and the second split housing are assembled by brazing.

[0011] To further optimize the technical solution, the cooling pipe mouth and the cooling pipe are assembled by brazing.

[0012] To further optimize the technical solution, the fins are brazed on the inner wall of the cooling tube.

[0013] Due to the adoption of the above technical scheme, the technical progress achieved by the utility model is as follows.

[0014] The utility model provides an EGR cooler which adopts a split shell structure, removes the parts main board in the traditional cooler structure, and arranges a plurality of cooling pipe openings in the split shell, thereby simplifying the parts of the cooler and improving the stability of the cooler without affecting the cooling function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a right side view of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the cooling nozzle of the utility model.

[0018] Among them: 1. air inlet flange, 2. air inlet chamber, 3. first split shell, 4. second split shell, 5. water outlet pipe, 6. air outlet flange, 7. fixing bracket, 8. mounting bracket, 9. water inlet pipe, 10. cooling pipe, 11. fin, 12. cooling pipe mouth. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] An EGR cooler, combined with Figures 1 to 3 As shown, it includes a shell, an air inlet chamber 2 is arranged on one side of the shell, an air inlet flange 1 is arranged on the air inlet chamber 2 for receiving high-temperature flue gas, and an air outlet flange 6 is arranged on the shell on the side opposite to the air inlet chamber 2 for connecting the engine pipeline.

[0021] The housing includes a first split housing 3 and a second split housing 4 . The first split housing 3 is connected to one side of the air inlet chamber 2 . The second split housing 4 is connected to the first split housing 3 . The air outlet flange 6 is arranged on one side of the second split housing 4 .

[0022] A plurality of cooling pipe openings 12 are respectively arranged in the first split housing 3 and the second split housing 4, and a cooling pipe 10 is arranged between adjacent cooling pipe openings 12. A water inlet pipe 9 is arranged on the first split housing 3, and a water outlet pipe 5 is arranged on the second split housing 4. The water inlet pipe and the water outlet pipe are connected to each other for receiving cooling liquid. The cooling liquid enters the cooler from the water inlet pipe and exchanges heat with the high-temperature flue gas connected to the cooler, and then is discharged from the water outlet pipe. Fins 11 are arranged on the inner wall of the cooling pipe 10 for exchanging heat with the high-temperature flue gas.

[0023] The first split shell 3, the second split shell 4, the cooling tube 10 and the fins 11 form a cooling cavity. The high-temperature flue gas enters the cooling cavity through the air inlet flange and the air inlet chamber, passes through the fins to exchange heat with the coolant, and then flows out from the air outlet flange, thereby achieving the purpose of flue gas cooling.

[0024] The first split housing 3 is provided with a mounting bracket 8, and the second split housing 4 is provided with a fixing bracket 7, which are used to mount the cooler on the engine.

[0025] Since the cooler is installed on the engine for operation, the cooler will vibrate when the engine is working. In order to increase the service life of the cooler, the first split shell 3 and the second split shell 4 are assembled by brazing, the cooling pipe mouth 12 and the cooling pipe 10 are assembled by brazing, the fin 11 is brazed on the inner wall of the cooling pipe 10, and the air inlet flange, air outlet flange, water inlet pipe, water outlet pipe, fixing bracket and mounting bracket are all fixed to the split shell by brazing.

[0026] When the utility model is installed, the cooler is installed on the engine through a bracket, the air inlet flange and the air outlet flange are respectively connected to the air outlet end and the air inlet end of the engine, and the water outlet pipe and the water inlet pipe are connected to the circulating cooling water. During the operation of the engine, the high-temperature flue gas discharged by the engine enters the cooler through the inlet flange, is cooled by the fins, and the cooled flue gas returns to the combustion chamber of the engine through the outlet flange for combustion.

Claims

1. An EGR cooler, comprising a housing, an air inlet chamber (2) being arranged on one side of the housing, an air inlet flange (1) being arranged on the air inlet chamber (2) for receiving high-temperature flue gas, and an air outlet flange (6) being arranged on the housing on the side opposite to the air inlet chamber (2) for connecting to an engine pipeline; characterized in that: The housing comprises a first split housing (3) connected to one side of the air inlet chamber (2) and a second split housing (4) connected to the first split housing (3); an air outlet flange (6) is arranged on one side of the second split housing (4); a plurality of cooling pipe openings (12) are respectively arranged in the first split housing (3) and the second split housing (4); a cooling pipe (10) is arranged between adjacent cooling pipe openings; a water inlet pipe (9) for receiving a cooling liquid is arranged on the first split housing (3); a water outlet pipe (5) for discharging the cooling liquid is arranged on the second split housing (4); and fins (11) for exchanging heat with high-temperature flue gas are arranged on the inner wall of the cooling pipe (10).

2. An EGR cooler according to claim 1, characterized in that: The first split housing (3) is provided with a mounting bracket (8) for mounting the cooler on the engine.

3. The EGR cooler according to claim 1, characterized in that: The second split housing (4) is provided with a fixing bracket (7) for mounting the cooler on the engine.

4. The EGR cooler according to claim 1, characterized in that: The first split housing (3) and the second split housing (4) are assembled by brazing.

5. The EGR cooler according to claim 1, characterized in that: The cooling pipe opening (12) and the cooling pipe (10) are assembled by brazing.

6. The EGR cooler according to claim 1, characterized in that: The fins (11) are brazed on the inner wall of the cooling tube.

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