U-shaped exhaust gas recirculation (EGR) cooler
An EGR cooler, U-shaped technology, applied to indirect heat exchangers, heat exchanger types, machines/engines, etc., can solve the problems of different degrees of thermal expansion and cold contraction, easy cracking of pipes, etc., to reduce thermal stress and improve The effect of service life
Active Publication Date: 2014-11-12
ZHEJIANG YINLUN MACHINERY
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Problems solved by technology
[0004] This conventional U-shaped plate-fin EGR cooler has the following disadvantages: when the EGR cooler is in operation, the housing, the flat tube assembly unit, the intake flat tube assembly unit, and the air outlet flat tube assembly unit have a degree of thermal expansion and contraction. different, resulting in thermal stress at the pipe and weld, the weld joint between the end plate and the end of the flat tube assembly unit or the pipe itself near the weld is very easy to crack
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[0039] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings.
[0040] Referring to the accompanying drawings, a U-shaped EGR cooler of the present invention includes a first connecting flange 1, a second connecting flange 4, a first main connecting plate 2, a second main connecting plate 12, and a first secondary connecting plate 3 , The second secondary connecting plate 11, the left housing 6, the right housing 7, the gas side end cover 13 and the water side end cover 14.
[0041] A cutoff plate 5 is arranged on the first connecting flange 1 to divide the first connecting flange 1 into an air inlet side and an air outlet side.
[0042] The tops of the left and right housings 6, 7 are provided with water inlets and outlets respectively, and the water inlets and outlets are respectively connected with a water inlet pipe 9 and a water outlet pipe 8, and the left and right housings 6, 7 correspond to the wat...
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The invention discloses a U-shaped exhaust gas recirculation (EGR) cooler which comprises a first connecting flange, a first main connecting plate, a second main connecting plate, a first auxiliary connecting plate, a second auxiliary connecting plate, a casing, a gas-side end cover and a water-side end cover. At least two flat pipe assembly unit groups are arranged in the casing, through holes corresponding to a flat pipe and an inclined plane containing the periphery of all through holes and provided with an indentation are arranged on the first main connecting plate, and a front end face and a rear end face of the first main connecting plate are connected with a first connecting flange and the first auxiliary connecting plate respectively. A plurality of through holes corresponding to the flat pipe and provided with flanges and an inclined plane containing the periphery of all the through holes and provided with an indentation are arranged on the first auxiliary connecting plate. The first main connecting plate and the first auxiliary connecting plate connected with the flat pipe are bent to form the inclined faces, the inclined faces of the first main connecting plate and the first auxiliary connecting plate are matched with each other, the design of the inclined faces can effectively reduce thermal stress, cracking of the flat pipe due to unevenness of expansion with heat and contraction with cold can not occur, and the service life of products is prolonged.
Description
technical field [0001] The invention belongs to the technical field of heat exchangers, and relates to a U-shaped plate type EGR cooler, which can be widely used in various automobile diesel engines. Background technique [0002] With the increasingly stringent emission requirements, exhaust gas recirculation technology is more and more applied to power plants, and various structures of EGR coolers have been produced one after another. Among them, the plate-fin structure EGR cooler is more widely used because of its excellent heat dissipation performance. The layout of the whole vehicle is required to be more and more compact, so more and more high-efficiency U-shaped plate EGR coolers are used. [0003] In a conventional U-shaped plate-fin structure EGR cooler, the air-side channel is composed of a plurality of flat tube assembly units. A single flat tube assembly unit consists of a flat tube and heat exchange fins plugged inside it. Each flat tube assembly unit is welde...
Claims
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IPC IPC(8): F02M25/07F28D1/047F02M26/29F02M26/32
CPCY02T10/121Y02T10/12
Inventor 赵优琪张文锋胡义红覃小军
Owner ZHEJIANG YINLUN MACHINERY