RU2350869C2 - Ventilator cooler tower diffuser - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention deals with design of contact cooler components (such as ventilator cooler tower diffusers) and may be of relevance in view of providing for the recooling needs of enterprises working in such spheres as chemical industry and power engineering. The cooler tower diffuser has a casing represented by a confuser-diffuser barrel fabricated of a glass material. On the casing outside there are intercrossing reinforcement ribs arranged. The intercrossing reinforcement ribs are hollow inside and have trapezoidal cross-section; they are positioned horizontally and vertically so that to form a meshed structure. The confuser-diffuser barrel is represented by a rotary body. The generatrix of the barrel confuser part surface is formed by a circular arc faired with the cylindrical surface generatrix. The barrel diffuser part is tapered. The tapered surface generatrix is faired with the cylindrical surface generatrix via a circular arc. Radius R₁ of the circular arc of the barrel confuser part is equal to 0.6-0.8 of the barrel height. Radius R₂ of the circular arc between the cylindrical and the tapered generatrices of the barrel surface is equal to 0.7-0.9 of the barrel height. The angle of the barrel tapered surface generatrix slant relative to the barrel vertical axis varies from 10° to 20°.

EFFECT: reduction of aerodynamic resistance in the flow section of the cooling tower diffuser combined with the diffuser structure rigidity enhancement.

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Description

The invention relates to contact coolers, in particular to the design of a diffuser of a fan cooling tower, and can be used at chemical and energy enterprises for cooling circulating water.

It is known to carry out a diffuser of a fan tower as part of a tower tower of a fan tower having a confuser-diffuser shape (see GB Patent No. 618285, Cl. F28C 1/00, 02/18/1949).

The implementation of the diffuser in the form of a part of the tower - the body of the tower allows to reduce aerodynamic losses and thereby increase the cooling efficiency of the circulating hot water. However, such a structural embodiment of the diffuser of the cooling tower leads to the complication and weighting of the design of the diffuser as a bearing part of the structure of the cooling tower housing.

The closest in technical essence and the achieved result is a fan cooler diffuser containing a housing made in the form of a confuser-diffuser shell made of glass material, on the outer surface of which intersecting stiffeners are made (see US patent No. 3780999, Cl. B01F 3/04, 25.12. 1973).

The implementation of the diffuser of the fan cooling tower made of glass-reinforced synthetic material with stiffeners on the outer surface of the diffuser made it possible to reduce the weight of the diffuser structure while maintaining structural rigidity. However, the implementation of V-shaped stiffening ribs in some cases does not allow achieving the required stiffness of the diffuser structure, which leads to the need to increase the shell wall thickness and increase the weight of the diffuser structure.

The objective of the present invention is to optimize the flow path of the diffuser and the design of the stiffening ribs of the diffuser of the fan tower.

The technical result achieved by the implementation of the invention is to reduce the aerodynamic drag of the flow path of the tower diffuser while increasing the stiffness of the diffuser structure.

This problem is solved, and the technical result is achieved due to the fact that the diffuser of the fan tower contains a housing made in the form of a confuser-diffuser shell made of glass material, on the outer surface of which intersecting stiffening ribs are made, the latter being hollow with a trapezoidal cross section and arranged vertically and horizontally with the formation of square cells in cross section between them, the confusor-diffuser shell is made in the form of a body of revolution, forming confuser surface portion of the sleeve is formed by a circular arc, smoothly mating with the generatrix of the cylindrical surface, and the diffuser part of the sleeve is conical and a conical surface smoothly joined by a circular arc with a generatrix of the cylindrical surface, the radius of the circular arc R ₁ confusor part of the sleeve is 0.6- 0.8 of the height of the sleeve, the radius of the circular arc R ₂ between the cylindrical and conical surfaces forming the sleeve is 0.7-0.9 of the height of the sleeve, and the angle n clone generatrix of the conical surface of the sleeve to the vertical axis of the shell is 10-20 °.

In the course of the study of the operation of fan cooler diffusers, a design of stiffeners was developed, which made it possible to obtain the optimal ratio between the weight of the product and its stiffness. The execution of the ribs is hollow and at the same time with a trapezoidal cross-section allowed, on the one hand, to reduce the weight of the product, and, on the other hand, to create a structure rigid in the transverse direction relative to the rib. The combination of vertical and horizontal stiffeners with the formation of square cells in the cross section of the cells between the ribs is aimed at the same, which makes it possible to achieve almost the same stiffness of the product both in the transverse and in the longitudinal direction. The second task, which is solved in this product, is to achieve the lowest possible aerodynamic resistance to the flow of air flowing through the diffuser. This was achieved by combining the parts of the diffuser tapering and expanding along the flow, for which the diffuser has the following parameters: the radius of the circular arc R _{1 of the} confuser part of the shell is 0.6-0.8 of the height of the shell, the radius of the circular arc R ₂ between the cylindrical and conical generators the surface of the shell is 0.7-0.9 of the height of the shell, and the angle of inclination of the generatrix of the conical surface of the shell to the vertical axis of the shell is 10-20 °, while the confuser-diffuser shell of the diffuser is made in the form of a body rotated I forming surface confuser (tapered downstream) part of the sleeve is formed by a circular arc, smoothly mating with the generatrix of the cylindrical surface and the diffuser (expanding downstream) part of the sleeve is conical and a conical surface smoothly joined by a circular arc with a generatrix of the cylindrical surface.

Figure 1 presents a longitudinal view of the diffuser of the fan tower.

Figure 2 - section aa in figure 1

The fan tower diffuser contains a housing made of a confuser-diffuser shell 1 made of glass material, on the outer surface of which intersecting stiffeners 2 are made, the latter being hollow with a trapezoidal cross section and arranged vertically and horizontally with the formation of square 3 cells in the cross section between them The confuser-diffuser shell 1 is made in the form of a body of revolution. The forming surface of the confuser part of the shell 1 is formed by an arc 4 of a circle smoothly conjugated with the generatrix 5 of the cylindrical surface, and the diffuser part of the shell 1 is conical and the forming 6 of the conical surface is smoothly conjugated by the arc 7 of a circle with the generatrix 5 of the cylindrical surface. The radius R _{1 of the} arc 4 of the circumference of the confuser part of the shell 1 is 0.6-0.8 of the height H of the shell 1, the radius R _{2 of the} arc 7 of the circle between the cylindrical 5 and the conical 6 forming the surface of the shell 1 is 0.7-0.9 of height N shell 1. The angle α of inclination forming 6 of the conical surface of the shell 1 to the vertical axis of the shell 1 is from 10 to 20 °.

The fan tower diffuser is mounted on top of the tower body. A fan blade wheel is installed in the diffuser (cooling tower casing and fan are not shown in the drawings). The fan carries out air intake through the windows made in the lower part of the cooling tower body. Water, in contact with the air flow created by the fan, is cooled, while heating the air. Heated air by the fan through the casing 1 of the diffuser is released into the atmosphere.

The present invention can be used in fan cooling towers for cooling water in water circulation systems of industrial enterprises with direct contact of the cooled water and its cooling air.

Claims (1)

A fan cooler diffuser containing a housing made in the form of a confuser-diffuser shell made of glass material, on the outer surface of which intersecting stiffeners are made, characterized in that the intersecting stiffeners are hollow with a trapezoidal cross section and are arranged vertically and horizontally with the formation of square cross-sections between them section of cells, the confuser-diffuser shell is made in the form of a body of revolution, forming the surface of the confuser part of the shell is formed by an arc of a circle smoothly conjugated with the generatrix of the cylindrical surface, and the diffuser part of the shell is made conical and the generator of the conical surface is smoothly conjugated by the arc of a circle with the generatrix of the cylindrical surface, while the radius of the arc of the circle R _{1 of the} confuser part of the shell is from 0.6 to 0.8 from the height of the shell, the radius of the arc of a circle R ₂ between the cylindrical and conical generators of the surface of the shell is from 0.7 to 0.9 from the height of the shell, and the angle of inclination of the generatrix of the conical surface The surface of the shell to the vertical axis of the shell is from 10 to 20 °.

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