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CN-122000172-A - Composite vortex generator of finned radiator for transformer and mounting device

CN122000172ACN 122000172 ACN122000172 ACN 122000172ACN-122000172-A

Abstract

A novel composite vortex generator of a finned radiator for a transformer and a mounting device thereof comprise a finned radiator main body, a turbulent flow belt, side baffles and a composite vortex generator. The composite vortex generator consists of an inclined triangular cone vortex generator and a pair of triangular winglet vortex generators, the inclined triangular cone vortex generator and the triangular winglet vortex generator are combined in a front-back cooperative mode, multistage disturbance and vortex expansion of a flow field are achieved, and the comprehensive heat exchange performance of the composite vortex generator exceeds that of a traditional single vortex generator. The turbulent flow belt is composed of embossing belts, fixing belts and fixing bolts, the embossing belts are used for embossing the composite vortex generators and realizing the array arrangement of the composite vortex generators on the surface of the finned radiator, and the embossing belts are connected through the fixing belts and then assembled with the finned radiator into a whole through the fixing bolts. The invention has the advantages of excellent performance, simple structure, convenient processing, convenient disassembly and assembly, and the like, effectively reduces the operation and maintenance cost, and is suitable for the enhanced heat exchange transformation of the finned radiator for the transformer.

Inventors

  • YANG JIAN
  • WANG XIUYU
  • CHEN JIE
  • JIA HAONAN

Assignees

  • 西安交通大学

Dates

Publication Date
20260508
Application Date
20260327

Claims (8)

  1. 1. The utility model provides a compound vortex generator of finned radiator and installation device for transformer which characterized in that includes finned radiator (1), vortex area (2), side baffle (3) and compound vortex generator (4). The finned radiator (1) consists of a plurality of finned radiating units (1-2) and is connected with an upper oil collecting pipe (1-1) and a lower oil collecting pipe (1-1), a plurality of turbulent flow belts (2) are arranged on the surface of an oil flow passage (1-2-1) of each finned radiating unit (1-2), and side baffles (3) are respectively arranged on two sides of a finned radiator main body (1).
  2. 2. The composite vortex generator and the installation device for the finned radiator for the transformer according to claim 1, wherein the turbulence belt (2) consists of a stamping belt (2-1), a fixing belt (2-2) and a fixing bolt (2-3). The fixing belts (2-2) are positioned on two sides of the finned radiating unit (1-2) and used for connecting the stamping belts (2-1), and the fixing belts (2-2) are fixed through the fixing bolts (2-3).
  3. 3. The novel vortex generator and the installation device for the finned radiator for the transformer are characterized in that the embossing belt (2-1) of the vortex generator is a horizontal long metal sheet, the length of the embossing belt is equal to the width of the finned radiator unit (1-2), a plurality of composite vortex generators (4) are machined on the surface in an array mode, and the embossing belt is tightly attached to the protruding part of the oil runner (1-2-1).
  4. 4. A novel vortex generator and mounting device for a finned radiator for a transformer according to claim 3, wherein each composite vortex generator (4) is composed of an inclined triangular pyramid shaped vortex generator (4-1) and a pair of triangular winglet vortex generators (4-2) arranged in tandem. The compound vortex generators (4) are arranged on the surface of the radiating fin units (1-2) in an array mode through the vortex generator embossing belts (2-1).
  5. 5. The novel vortex generator and the installation device for the finned radiator for the transformer are characterized in that the inclined triangular conical vortex generator (4-1) is formed by rotating a pair of inclined side wings (4-1-1) inwards by a certain angle along the bottom edges of the side wings until the top edges of the inclined side wings (4-1-1) coincide, and the triangular winglet vortex generator (4-2) is formed by rotating a pair of inclined winglets (4-2-1) inwards by 90 degrees along the bottom edges of the winglets.
  6. 6. The novel vortex generator and the installation device for the finned radiator for the transformer according to claim 4 are characterized in that the bottom width d 1 of the inclined triangular cone-shaped vortex generator (4-1), the deflection degree of the inclined flank (4-1-1) is beta, the inclination angle alpha of the inclined triangular cone-shaped vortex generator (4-1) and incoming flow is alpha, the thickness of the inclined triangular cone-shaped vortex generator (4-1) is t, and the height of the inclined flank (4-1-1) is h 1 .
  7. 7. The novel vortex generator and the installation device for the finned radiator for the transformer are characterized in that the bottom width d 2 of the triangular winglet vortex generator (4-2), the thickness of the inclined winglet (4-2-1) is t, and the height of the inclined winglet (4-2-1) is h 2 .
  8. 8. The novel vortex generator and the installation device for the finned radiator for the transformer are characterized in that the flow direction distance between the inclined triangular conical vortex generator (4-1) and the triangular winglet vortex generator (4-2) is L 1 , and the range of the flow direction distance is 0.5h 1 ~2h 1 so as to adapt to the cooperative reinforcement effect under different flow speed working conditions.

Description

Composite vortex generator of finned radiator for transformer and mounting device Technical Field The invention relates to the technical field of transformer heat dissipation, in particular to a composite vortex generator structure for a plate radiator and a modularized installation device thereof, which are particularly suitable for design and transformation of an air side reinforced heat exchange structure of an oil immersed transformer. Background With the increase of the electric energy demand in China and the continuous aging of the electric power equipment, the internal heating value is continuously increased. The finned radiator is used as a key radiating component of the oil immersed transformer, and the radiating efficiency of the finned radiator directly influences the operation safety and service life of the transformer. Vortex generators, which are a passive enhanced heat transfer technology, have been widely used to enhance radiator performance by inducing longitudinal vortices to break down the thermal boundary layer, enhancing fluid mixing. However, the conventional vortex generators such as delta wing, trapezoidal wing, etc. have a problem of insufficient heat exchange enhancement due to the insufficient vortex forming ability of the single type of vortex generator at the surface of the radiator. Therefore, the invention provides a composite vortex generator, which combines a winglet vortex generator and an airfoil vortex generator to form a front-back cooperative vortex generating device, and aims to obtain better comprehensive heat exchange performance. Disclosure of Invention The invention aims to provide a composite vortex generator of a finned radiator for a transformer and a mounting device, wherein the winglet and the airfoil vortex generator are combined to realize multistage disturbance and vortex expansion of a flow field, so that the heat exchange efficiency of the air side of the finned radiator is obviously improved, and meanwhile, a modularized mounting mode is adopted, so that the composite vortex generator is convenient to assemble, disassemble and maintain. The technical scheme of the invention is as follows: A composite vortex generator of plate radiator for transformer is composed of plate radiator, fixing band, disturbance band and composite vortex generator. The finned radiator consists of a plurality of finned radiating units and upper and lower oil collecting pipes, wherein a plurality of turbulent flow belts are arranged on the surface of an oil flow passage of each finned radiating unit, and the turbulent flow belts are fixed on the surface of each finned radiating unit through fixing belts. Side baffles are also arranged on two sides of the finned radiator and used for preventing air from entering the side face of the radiator. The turbulent flow belt is composed of stamping belts, fixing belts and fixing bolts, the stamping belts are horizontal long metal sheets, the lengths of the stamping belts are equal to the width of the oil flow channel of the plate type radiating unit, the stamping belts are connected through the fixing belts, the fixing belts are symmetrically arranged on two sides of the plate type radiating unit, the fixing belts are fastened through the fixing bolts to complete installation, modularized fixing of the turbulent flow belt can be achieved, and the turbulent flow belt is convenient to assemble and disassemble and is tightly attached to the oil flow channel. The surface of the embossing belt is provided with a plurality of composite vortex generators in an array mode, the composite vortex generators are formed by arranging an inclined triangular cone-shaped vortex generator and a pair of triangular winglet vortex generators back and forth, and the triangular winglet vortex generator is positioned in front of incoming flow of the inclined triangular cone-shaped vortex generator. The inclined triangular cone-shaped vortex generator is formed by a pair of inclined side wings which rotate inwards by a certain angle along the bottom edges of the side wings until the top edges of the inclined side wings coincide. The bottom of the inclined triangular cone-shaped vortex generator is wide d 1, the deflection of the inclined flank is beta, the inclination angle alpha of the inclined triangular cone-shaped vortex generator and the incoming flow is alpha, the thickness of the inclined triangular cone-shaped vortex generator is t, and the height of the inclined flank is h 1. The delta-winglet vortex generator is derived from a pair of canted winglets rotated 90 inwardly along the winglet base. The bottom of the triangular winglet vortex generator is wide d 2, the thickness of the inclined winglet is t, and the height of the inclined winglet is h 2. The inclined triangular conical vortex generator can generate stronger vortex, and the unique extending structure of the two side wings can extend the vortex to two sides and the flowing direction while reduci