Exhaust gas cooler

Patent metadata

Field	Value
Publication number	US-10180287-B2
Application number	US-201414308849-A
Country	US
Kind code	B2
Filing date	Jun 19, 2014
Priority date	Jun 21, 2013
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

An exhaust gas cooler includes tubes to convey an exhaust gas through the cooler, a header plate to receive ends of the tubes, and a diffuser. The diffuser and the header plate together define an inlet plenum for the exhaust gas. The diffuser includes a connection flange to join the diffuser to the header plate, and the connection flange is substantially shielded from the flow of exhaust gas passing through the inlet plenum.

First claim

What is claimed is:

1. An exhaust gas cooler comprising:
a plurality of tubes to convey an exhaust gas flow through the cooler;
a casing surrounding the plurality of tubes;
a header plate to receive ends of the plurality of tubes, the header plate including a middle portion with slots that receive the ends, a periphery around the middle portion, and a collar extending from the periphery;
a single wall diffuser, the diffuser and the header plate together defining an inlet plenum for the exhaust gas flow, the diffuser extending from a diffuser inlet end to a diffuser outlet end, the diffuser outlet end being proximal to the middle portion of the header and the diffuser outlet end extending in a direction away from the periphery; and
a connection flange located at least partially within the inlet plenum and extending from the diffuser to the collar of the header plate to join the diffuser to the header plate, the connection flange being continuously connected to the diffuser around an outside surface of the diffuser proximal to the diffuser outlet end, having a first flange end that joins with the diffuser at a first location nearer to the diffuser outlet end than to the diffuser inlet end, and having a second flange end, the second flange end located proximal to a second location where the connection flange is fixedly joined to the collar of the header plate,
wherein at least a portion of the connection flange and at least a portion of the header plate are substantially shielded from the exhaust gas flow passing through the inlet plenum, and
wherein the inlet plenum is further defined by a space between the header plate and the connection flange.

2. The exhaust gas cooler of claim 1 , wherein the first location is between five millimeters and twenty millimeters from the diffuser outlet end.

3. The exhaust gas cooler of claim 1 , wherein the inlet plenum extends around an exhaust gas outlet end of the diffuser, and the diffuser is sealed along a perimeter of the diffuser by a joint between the connection flange and the header plate.

4. The exhaust gas cooler of claim 1 , wherein the inlet plenum is further defined by a space between the plurality of tubes and the connection flange.

5. The exhaust gas cooler of claim 1 , wherein the diffuser includes an exhaust gas inlet end and an exhaust gas outlet end, and wherein the exhaust gas outlet end is located closer to the exhaust gas inlet end than at least one long side of one tube of the plurality of tubes.

6. The exhaust gas cooler of claim 5 , wherein the exhaust gas outlet end is spaced apart from the header plate, the casing and the connection flange.

7. The exhaust gas cooler of claim 6 , wherein a continuous wall includes a first portion that extends outwardly from the diffuser and is joined thereto and a second portion joined to both the first portion and the header plate and arranged at an angle to the first portion, and wherein an open space is defined between the exhaust gas outlet end and an end of the second portion located opposite the first portion.

8. The exhaust gas cooler of claim 1 , wherein the connection flange is L-shaped having a first portion connected to the diffuser and a second portion extending from the first portion to the header plate and joined to the header plate, wherein the first portion is spaced from the header plate, and wherein the first portion is fluidly sealed to the diffuser.

9. An exhaust gas cooler having a plurality of tubes to convey an exhaust gas flow, a header plate to receive ends of the plurality of tubes, and a diffuser, the diffuser comprising:
an inlet end to receive the exhaust gas into the cooler;
an outlet end to deliver the exhaust gas to the plurality of tubes;
a diffuser body extending between the inlet end and the outlet end; and
a connection flange joined to the header plate, the connection flange including a first portion connected to the diffuser body at a location between the inlet end and the outlet end and a second portion spaced from the diffuser body, the first portion extending radially outward from the diffuser body and the second portion extending toward the outlet end of the diffuser body.

10. The exhaust gas cooler of claim 9 , wherein the joint between the connection flange and the header plate defines a continuous leak-free seal for the exhaust gas and wherein connection flange is fluidly sealed to the diffuser body.

11. The exhaust gas cooler of claim 9 , wherein said location between the inlet end and the outlet end is between five millimeters and twenty millimeters from the outlet end.

12. The exhaust gas cooler of claim 9 , wherein the connection flange is joined to the header plate at the second portion, and wherein the second portion of the connection flange extends substantially perpendicular to the first portion.

13. The exhaust gas cooler of claim 9 , wherein the connection flange defines a conduction path length between the diffuser body and the header plate, the conduction path length being at least three times the mean thickness of the connection flange.

14. The exhaust gas cooler of claim 9 , wherein the connection flange and the diffuser body are an integral casting, and wherein the first portion of the connection flange extends substantially perpendicular to the diffuser body.

15. The exhaust gas cooler of claim 9 , wherein the connection flange is joined to the header plate by a continuous weld joint at the location between the inlet end and the outlet end.

16. An exhaust gas cooler comprising:
a plurality of conduits to convey an exhaust gas flow through the cooler;
a header plate to receive ends of the conduits;
a case surrounding the plurality of conduits;
a diffuser connected to the header plate to define an inlet plenum for the exhaust gas flow, the diffuser extending from a diffuser inlet end to a diffuser outlet end; and
a connection flange including a continuous wall that is connected to an outside surface of the diffuser at a first location proximal to the diffuser outlet end, and is connected to the header plate at a second location, and includes an angle between the first location and the second location;
wherein the diffuser extending toward the header plate extends past the first location and past the second location,
wherein the continuous wall is continuously connected to the diffuser at the first location to form a seal between the continuous wall and the diffuser,
wherein at least a portion of the continuous wall extends in a different direction than the diffuser,
wherein an inside surface of the diffuser at least partially defines a first portion of the inlet plenum, and the outside surface of the diffuser and the continuous wall at least partially define a second portion of the inlet plenum,
wherein the first portion defines a flow path between the exhaust gas inlet end and an exhaust gas outlet end of the diffuser, and
wherein the second portion is radially spaced from the flow path.

17. The exhaust gas cooler of claim 16 , wherein the connection flange connects the diffuser to the header plate at an inside surface of the header plate such that the diffuser is located at least partially within the header plate.

18. The exhaust gas cooler of claim 16 , wherein the case is connected to the header plate at an outside surface of the header plate.

19. The exhaust gas cooler of claim 16 , wherein the diffuser includes at least one notch at the diffuser outlet end.

20. The exhaust gas cooler of claim 19 , wherein the diffuser outlet end includes a plura

Assignees

• Modine Mfg Co

Inventors

• Sweet Brian
• Grotophorst Thomas R

Classifications

• F28F9/02

  Header boxes; End plates · CPC title

• F28F2265/10

  for preventing overheating, e.g. heat shields · CPC title

• F28F9/0219

  Arrangements for sealing end plates into casing or header box; Header box sub-elements (F28F9/0236 takes precedence) · CPC title

• F28D7/1684

  the conduits having a non-circular cross-section · CPC title

• F02M26/32

  Liquid-cooled heat exchangers · CPC title