RU2451875C1 - Heat exchanger - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: heat exchanger comprises helical elements from pipes installed in gaps between coils of each other. At the same time in each coil there are two straight and two rounded sections. Identical sections are located oppositely to each other. Each helical element comprises at least three straight sections, which are equidistant near adjacent elements. Axes of all elements in a heat exchanger cross in one point, which is simultaneously installed on the heat exchanger axis. Besides, any point at the axis of the heat exchanger is also a centre of a polygon, on a contour of which there are centres of pipes in any cross section of the heat exchanger via the specified point in the zone of straight sections of helical elements. Straight sections near adjacent helical elements may have different length. Opposite rounded sections of helical elements may be arranged with various radii, which monotonously alternate in coils, besides, the same alternation is arranged near adjacent helical elements.

EFFECT: compactness of a heat exchanger, especially in an area of location of straight sections, and also possibility to install a heat exchanger in cavities with a polygonal cross section, both permanent and alternating in height.

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Description

The invention relates to the field of power engineering and can be used in a wide range both in stationary and in transport power plants.

There are known analogues of heat exchangers containing screw elements from pipes, elements are adjacent and embedded in the gaps between the turns of each other (see, for example, AS USSR No. 254394; No. 290831; No. 312832).

Also known is a heat exchanger containing screw elements made of pipes installed in the gaps between the turns of one another and having in each turn two straight and two rounded sections with the same-named sections opposite each other (see AS USSR No. 278223).

Such a heat exchanger is characterized by a set of features that are most similar to the set of essential features of the invention, and is taken as a prototype.

A disadvantage of the known heat exchanger is its considerable dimensions due to the impossibility of placing straight sections at adjacent helical elements compactly and equidistantly relative to each other with the location of the pipe centers at straight sections in the cross section of the heat exchanger on the polygon contour. Moreover, this is impossible due to the fact that for a known heat exchanger the axes of adjacent helical elements do not intersect at one point, which must also be located on the axis of the heat exchanger. Moreover, any point on the axis of the known heat exchanger cannot be the center of the polygon, on the contour of which the centers of the pipes are located in any cross-section of the heat exchanger in the area of straight sections of adjacent helical elements.

In order to eliminate these drawbacks and expand the layout capabilities in a heat exchanger containing screw elements from pipes, which are installed with each other inserted into the gaps between the turns and having two straight and two rounded sections on each coil, with the same-named sections opposite each other the helical element is made with at least three straight sections. The straight sections of adjacent helical elements are equidistant relative to each other due to the location of the helical elements in such a way that their axes intersect at one point. At the same time, this point is located on the axis of the heat exchanger. Moreover, any point on the axis of the heat exchanger is also the center of the polygon, on the contour of which the centers of the pipes are located in any cross section of the heat exchanger through the specified point in the zone of straight sections of adjacent helical elements.

Straight sections of adjacent helical elements can have different lengths.

The radii of the opposite rounded sections of the helical elements can be different. Moreover, the radii monotonously alternate in the turns of helical elements, while in adjacent helical elements the monotonic alternation coincides.

Figure 1 shows a heat exchanger (general view).

Figure 2 is a view A from figure 1.

Figure 3 is a section bB with figure 1.

Figure 4 shows a single screw element from the pipe of figure 1 (General view).

Figure 5 is a view In from figure 4.

Figure 6 shows a heat exchanger with different radii of opposite rounded sections in helical elements (General view).

In Fig.7 depicts a single helical element from the pipe of Fig.6 (General view).

In Fig.8 is a view of G from Fig.7.

The heat exchanger consists of screw elements 1 containing straight sections 2, rounded sections 3 and the axis of the screw element 4, as well as from the axis 5 of the heat exchanger, the point 6 of the intersection of the axes 4 of the screw elements 1, from the contour of the polygon 7, on which the centers of the pipes 8 are located, inlet and outlet pipe ends 9.

One of the heat transfer media enters the screw elements 1 and leaves them through the inlet and outlet ends of the pipes 9.

Another heat transfer medium moves outside the screw elements 1 parallel to the axis 5 of the heat exchanger. Possible transverse axis 5 organization of the movement of the heat transfer medium.

The proposed heat exchanger allows to achieve the following results:

- reduce the dimensions, since the straight sections of adjacent helical elements can be located with the smallest possible gaps relative to each other, while ensuring significant compactness of the heat exchanger;

- expand the layout capabilities, since the heat exchanger can be placed in the cavity with both round and polygonal cross-section, and the area of such a section, along the height of the cavity, can have a different size.

Claims (3)

1. A heat exchanger containing screw elements from pipes installed in the gaps between the turns of one another and having in each turn two straight and two rounded sections with the same sections located opposite each other, characterized in that each screw element contains at least three straight sections, while the latter for adjacent helical elements are equidistant relative to each other, and the axis of all helical elements intersect at one point located simultaneously on the axis of the heat exchanger, moreover any point on this axis is also the center of the polygon, on the contour of which the centers of the pipes are located in any cross section of the heat exchanger through the said point in the zone of straight sections. 2. The heat exchanger according to claim 1, characterized in that the straight sections of adjacent helical elements have different lengths. 3. The heat exchanger according to claim 1 or 2, characterized in that the radii of the opposite rounded sections are different and monotonously alternate in turns of screw-shaped elements, and in adjacent screw-shaped elements the monotonic alternation coincides.

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