CN215930647U

CN215930647U - Thermal stress resistant seal and plate-fin heat exchanger core applying same

Info

Publication number: CN215930647U
Application number: CN202121518836.2U
Authority: CN
Inventors: 徐荣飞; 王峰
Original assignee: Wuxi Hongsheng Heat Exchange System Co ltd
Current assignee: Wuxi Hongsheng Heat Exchange System Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-03-01
Anticipated expiration: 2031-07-05

Abstract

The utility model relates to the technical field of plate-fin heat exchangers, in particular to a thermal stress resistant seal and a plate-fin heat exchanger core applying the thermal stress resistant seal. The thermal stress resistant seal comprises a first seal section and a second seal section, wherein the first seal section and the second seal section are integrally formed, the first seal section and the second seal section are both in a long strip-shaped structure, the upper end face, the lower end face, the left end face, the right end face and the left end face of the first seal section are connected to form a rectangular structure, the left end face and the right end face of the second seal section are parallel to each other, the upper end face and the lower end face of the second seal section are arranged in an up-down symmetrical mode along a horizontal plane, and the right end face of the first seal section is correspondingly connected with the left end face of the second seal section. The partition plate and the heat stress resistant seal are connected at a small angle, so that the concentrated heat stress at the joint of the partition plate and the heat stress resistant seal is reduced, and the heat stress resistant life of the heat exchanger is prolonged; the gap between the clapboard and the heat stress resistant seal is also beneficial to filling of brazing solder, and the brazing quality is improved.

Description

Thermal stress resistant seal and plate-fin heat exchanger core applying same

Technical Field

The utility model relates to the technical field of plate-fin heat exchangers, in particular to a thermal stress resistant seal and a plate-fin heat exchanger core applying the thermal stress resistant seal.

Background

Plate-fin heat exchangers are generally composed of partitions, fins, seals, and guide vanes. The heat exchanger is characterized in that fins, flow deflectors and seals are arranged between two adjacent partition plates to form an interlayer which is called a heat exchange channel, the interlayer is overlapped according to different fluid modes, and a core body is formed by brazing the interlayer into a whole and is the core of the plate-fin heat exchanger.

In the prior art, the sealing strips at the two ends of the heat exchange channel in the length direction are connected with the partition plates at the upper end and the lower end at right angles, the joint of the sealing strips and the partition plates is easy to generate large concentrated thermal stress, the partition plates are easy to crack at the joint, the heat exchanger is sealed to lose efficacy, and leakage of heat exchange media in the heat exchange channel occurs.

SUMMERY OF THE UTILITY MODEL

The heat stress resistant seal and the plate-fin heat exchanger core applying the heat stress resistant seal are provided by the applicant aiming at the defects in the prior art, the partition and the seal are connected at a small angle, the concentrated heat stress at the joint of the partition and the seal is reduced, and the heat stress resistant life of the heat exchanger is prolonged.

The technical scheme adopted by the utility model is as follows:

the thermal stress resistant seal comprises a first seal section and a second seal section, wherein the first seal section and the second seal section are integrally formed, the first seal section and the second seal section are both in a long strip-shaped structure, the upper end face, the lower end face, the left end face, the right end face and the left end face of the first seal section are connected to form a rectangular structure, the left end face and the right end face of the second seal section are parallel to each other, the upper end face and the lower end face of the second seal section are arranged in an up-down symmetrical mode along a horizontal plane, and the right end face of the first seal section is correspondingly connected with the left end face of the second seal section.

Furthermore, the upper end face and the lower end face of the second seal strip section are both inclined planes.

Furthermore, the upper end face and the lower end face of the second seal strip section are both arc faces.

Furthermore, the difference value range of the widths of the left end face and the right end face of the second seal strip section is 0.2 mm-1 mm.

A plate-fin heat exchanger core applying heat stress resistant seals comprises a heat exchange core body, wherein the upper end and the lower end of the heat exchange core body are respectively connected with a cover plate, the heat exchange core body comprises a plurality of first heat exchange channels and a plurality of second heat exchange channels, the plurality of first heat exchange channels and the plurality of second heat exchange channels are alternately distributed from top to bottom, outer fins are arranged in the first heat exchange channels along the length direction, partition plates are respectively welded on the upper ends and the lower ends of the outer fins, heat stress resistant seals are respectively arranged at two ends of the first heat exchange channels in the length direction, each heat stress resistant seal comprises a first seal section and a second seal section, the first seal section and the second seal section are integrally formed, the first seal section and the second seal section are of long strip structures, the upper end face, the lower end face, the left end face, the right end face and the right end face of the first seal section are connected to form a rectangular structure, the left end face and the right end face of the second seal section are parallel, the upper end face and the lower end face of the second seal section are vertically symmetrically arranged along the horizontal plane, the right end face of the first seal strip section is correspondingly connected with the left end face of the second seal strip section, the upper end face and the lower end face of the first seal strip section are welded with the partition boards at the upper end and the lower end, and the second seal strip section faces the outer fin; inner fins are arranged in the second heat exchange channel along the width direction, partition plates are welded to the upper ends and the lower ends of the inner fins respectively, long sealing strips are arranged at two ends of the second heat exchange channel in the width direction respectively, and the partition plates at the upper end and the lower end of each long sealing strip are welded to the partition plates.

Furthermore, one end of the long seal facing the inner fin is provided with a convex thermal stress resistant strip, and the cross section of the thermal stress resistant strip is in the shape of an isosceles triangle.

The utility model has the following beneficial effects:

the heat exchanger is compact and reasonable in structure, the partition board and the heat stress resistant seal are connected at a small angle, so that the concentrated heat stress at the joint of the partition board and the heat stress resistant seal is reduced, and the heat stress resistant life of the heat exchanger is prolonged; the gap between the clapboard and the heat stress resistant seal is also beneficial to filling of brazing solder, and the brazing quality is improved.

Drawings

Fig. 1 is a front view of a heat stress resistant seal.

Fig. 2 is a side view of a thermal stress resistant seal.

Fig. 3 is a front view of a plate-fin heat exchanger core to which a heat stress resistant seal is applied.

Fig. 4 is a side view of a plate fin heat exchanger core with an applied thermal stress seal.

Wherein: 100. a thermal stress resistant seal; 101. a first seal segment; 102. a second seal segment; 200. a long seal; 201. a thermal stress resistant strip; 300. a cover plate; 400. an outer fin; 500. an inner fin; 600. a separator.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

In the embodiment shown in fig. 1 and 2, the thermal stress resistant seal 100 generally comprises a first seal segment 101 and a second seal segment 102, the first seal segment 101 and the second seal segment 102 being integrally formed. The first seal segment 101 and the second seal segment 102 are both strip-shaped structures.

In the embodiment shown in fig. 1 and 2, the upper, lower, left and right end faces of the first seal segment 101 are connected to form a rectangular structure, the left and right end faces of the second seal segment 102 are parallel to each other, the upper and lower end faces of the second seal segment 102 are arranged vertically symmetrically along a horizontal plane, and the right end face of the first seal segment 101 is correspondingly connected to the left end face of the second seal segment 102. The upper and lower end faces of the second seal segment 102 are both inclined planes.

The upper and lower end surfaces of the second seal segment 102 can also be provided as circular arc surfaces.

In the embodiment shown in fig. 1 and 2, the width difference between the left and right end faces of the second seal segment 102 is in the range of 0.2mm to 1mm, and the concentrated thermal stress can be reduced as much as possible within this range.

In the embodiment shown in fig. 3 and 4, the plate-fin heat exchanger core applying the thermal stress resistant seal mainly comprises a heat exchange core, and the upper end and the lower end of the heat exchange core are respectively connected with a cover plate 300. The heat exchange core body comprises a plurality of first heat exchange channels and a plurality of second heat exchange channels, and the first heat exchange channels and the second heat exchange channels are alternately distributed from top to bottom.

In the embodiment shown in fig. 3 and 4, the outer fins 400 are arranged in the first heat exchange channel along the length direction, and the separators 600 are welded to the upper and lower ends of the outer fins 400, respectively. The two ends of the first heat exchange channel in the length direction are respectively provided with an anti-thermal stress seal 100, the upper end face and the lower end face of the first seal section 101 are connected with the separators 600 at the upper end and the lower end in a welding mode, and the second seal section 102 faces the outer fin 400.

In the embodiment shown in fig. 3 and 4, the inner fins 500 are arranged in the second heat exchange channel along the width direction, and the separators 600 are welded to the upper and lower ends of the inner fins 500, respectively. Two ends of the second heat exchange channel in the width direction are respectively provided with a long seal 200, the upper end and the lower end of the long seal 200 are connected with the partition 600 at the upper end and the lower end in a welding manner, one end of the long seal 200 facing the inner fin 500 is provided with a convex thermal stress resistant strip 201, and the cross section of the thermal stress resistant strip 201 is in an isosceles triangle shape.

The above description is intended to illustrate the present invention and not to limit the present invention, which is defined by the scope of the claims, and may be modified in any manner within the scope of the present invention.

Claims

1. A thermal stress resistant seal comprising a first seal segment (101) and a second seal segment (102), characterized in that: the first seal strip section (101) and the second seal strip section (102) are integrally formed, the first seal strip section (101) and the second seal strip section (102) are both of a long strip-shaped structure, the upper end face, the lower end face, the left end face, the right end face and the left end face of the first seal strip section (101) are connected correspondingly, and the second seal strip section (102) is arranged in an up-down symmetrical mode along a horizontal plane.

2. The thermal stress resistant seal of claim 1, wherein: the upper end face and the lower end face of the second seal strip section (102) are both inclined planes.

3. The thermal stress resistant seal of claim 1, wherein: the upper end face and the lower end face of the second seal strip section (102) are both arc surfaces.

4. The thermal stress resistant seal of claim 1, wherein: the width difference value range of the left end face and the right end face of the second seal strip section (102) is 0.2 mm-1 mm.

5. The utility model provides an use plate-fin heat exchanger core of thermal stress seal strip, includes the heat transfer core, apron (300) are connected respectively to the upper and lower end of heat transfer core, and the heat transfer core includes a plurality of first heat transfer passageways and a plurality of second heat transfer passageway, and a plurality of first heat transfer passageways and a plurality of second heat transfer passageway from last down alternate distribution, set up outer fin (400) along length direction in the first heat transfer passageway, baffle (600) are welded respectively to the lower extreme on outer fin (400), its characterized in that: the two ends of the first heat exchange channel in the length direction are respectively provided with an anti-thermal stress seal (100), the anti-thermal stress seal (100) comprises a first seal section (101) and a second seal section (102), the first seal strip section (101) and the second seal strip section (102) are integrally formed, the first seal strip section (101) and the second seal strip section (102) are both in a strip-shaped structure, the upper end face, the lower end face, the left end face and the right end face of the first seal strip section (101) are connected to form a rectangular structure, the left end face and the right end face of the second seal strip section (102) are parallel to each other, the upper end face and the lower end face of the second seal strip section (102) are arranged in an up-down symmetrical mode along a horizontal plane, the right end face of the first seal strip section (101) is correspondingly connected with the left end face of the second seal strip section (102), the upper end face and the lower end face of the first seal strip section (101) are connected with the partition plates (600) at the upper end and the lower end in a welded mode, and the second seal strip section (102) is arranged facing the outer fins (400); inner fins (500) are arranged in the second heat exchange channel along the width direction, the upper ends and the lower ends of the inner fins (500) are respectively welded with a partition plate (600), the two ends of the second heat exchange channel in the width direction are respectively provided with a long seal (200), and the upper end and the lower end of the long seal (200) are welded with the partition plates (600) of the upper end and the lower end.

6. The plate fin heat exchanger core employing a seal against thermal stress of claim 5, wherein: one end of the long seal (200), facing the inner fin (500), is provided with a convex thermal stress resistant strip (201), and the cross section of the thermal stress resistant strip (201) is in the shape of an isosceles triangle.

7. The plate fin heat exchanger core employing a seal against thermal stress of claim 5, wherein: the upper end face and the lower end face of the second seal strip section (102) are both inclined planes.

8. The plate fin heat exchanger core employing a seal against thermal stress of claim 5, wherein: the upper end face and the lower end face of the second seal strip section (102) are both arc surfaces.