CN201259815Y - Novel plate type heat radiator for transformer - Google Patents

Abstract

The utility model relates to a new heat convection and transfer enhancing finned radiator for a transformer, which is characterized in that inserts are arranged in oil paths of radiation fins and medium transformer oil in enhancement plates equalizes the radial temperature of the inserts, thus improving cooperation of the velocity field and the heat flow field. Heat dissipation capacity of the finned radiator is improved by more than 20% and the transverse volume of the finned radiator is reduced. The new finned radiator provides more choices for power transformer cooling devices and reduces cost.

Description

A kind of novel gilled radiator for transformer

Technical field

The utility model relates to a kind of novel gilled radiator for transformer, specifically is the fin type heat radiator for transformer that a kind of heat convection is strengthened, and is the heat exchanger of 110KV, 220KV and 500KV high-power transformer first-selection.

Background technology

Along with the raising of electric power system low energy consumption and noise reduction demand, the reduction of high-power transformer total losses adopts the transformer capacity of the oil (ONAN) or oil (OFAF) type of cooling also increasing.Forced-oil-air cooling cooling system blower fan or oil pump break down, transformer is with out of service, oil can be for 70% load and (ONAN), if adopt two group one blow or three group one blow, oil can be for 100% load, the particularity of operation power enlarges the diffusing usage space of sheet greatly, fin type heat radiator for transformer is generally fixed groups of fins spacing arrangement in accordance with regulations by some at present, every pair of groups of fins by two stamping forming steel plate seam together, after two steel plate seam within it portion form several oil ducts naturally, the oil-in and the oil-out of groups of fins are separately positioned on, on the flange of bottom, oil inlet pipe and flowline are set on the flange.For keeping the winding temperature rise conformance with standard, do not influence transformer insulated thermal life and capability of overload, must select for use the sheet of some to loose and low noise axial fan in the design again.Huge radiator group brings difficulty for again the high-power transformer arranged around, for example: PC3000-28/520 is selected in 240MVA/220KV power transformer design of certain co-partnership company for use, and 36 groups, promptly high-pressure side, low-pressure side are each 18 groups, make the locus narrow and small, maintenance and installation is very inconvenient.Improve separate unit gilled radiator cooling capacity, reduce the diffusing horizontal volume of sheet, become current high-power transformer development problem anxious to be solved.

The utility model content

The utility model is augmentation of heat transfer technology first Application on fin type heat radiator for transformer, it will rely on the gilled radiator of heat convection, on the angle that cooperatively interacts from heat flow field and velocity field, in the fin oil duct, insert is set, form the oval augmentation of heat transfer of intersection convergent-divergent, according to the centre-to-centre spacing difference, the insert physical dimension changes to some extent, can improve the separate unit heat dissipation capacity more than 20%.

The utility model is by the following technical solutions for achieving the above object:

A kind of novel gilled radiator for transformer, comprise some to the chip groups of fins, groups of fins inside is provided with several oil ducts, the oil-in of oil duct and oil-out are separately positioned on the flange of upper and lower part, upper and lower flange place is provided with oil inlet pipe and flowline, oil inlet pipe and flowline respectively with oil-in and oil-out UNICOM, it is characterized in that: in described oil duct, insert is set.

The cross section ovalize of the oil duct of described groups of fins inside, described insert evenly distribute in oil duct, can make oily turbulization when passing through in oil duct.

The utility model is provided with insert in the oil duct of the groups of fins inside of transformer chip radiator, the effect of this insert is meeting turbulization when cold oil is flowed through in oil duct, turbulent flow is a kind of flow regime of fluid, when flow velocity is very little, fluid layering flows, and does not mix mutually, is called laminar flow, or be called laminar flow, increase flow velocity gradually, the streamline of fluid begins to occur wavy swing, and the frequency of swing and amplitude increase with the increase of flow velocity, this kind stream condition is called transition flow, when flow velocity is increased to when very big, streamline is no longer clear can distinguish that many little whirlpools are arranged in the flow field, be called turbulent flow, be called sinuous flow again, flow-disturbing or turbulent flow; When cold oil during through the oil duct turbulization, directly flowing through the utility model relatively at present can make the thermal convection exchange of cold oil and groups of fins more abundant, the oil duct cold oil of same specification is flowed through apart from also longer, make heat flow field and velocity field optimize cooperation mutually, improve the heat dissipation capacity of separate unit radiator.

Description of drawings

Fig. 1, structural representation of the present utility model;

Fig. 2, internal structure schematic diagram of the present utility model.

Embodiment

As Fig. 1, shown in 2, a kind of novel gilled radiator for transformer, comprise some to chip groups of fins 1, groups of fins 1 inside is provided with several oil ducts 11, the cross section ovalize of the oil duct 11 of described groups of fins 1 inside, the oil-in and the oil-out of oil duct are provided with respectively, the flange 12 of bottom, on 13, on, lower flange 12,13 places are provided with oil inlet pipe 2 and flowline 3, oil inlet pipe 2 and flowline 3 respectively with oil-in and oil-out UNICOM, in described oil duct 11, insert 4 is set, described insert 4 evenly distributes in oil duct, can make oily turbulization when passing through in oil duct.

The utility model is by being provided with insert 4 in oil duct 11, in fin oil duct 22, form the oval augmentation of heat transfer of intersection convergent-divergent, according to the centre-to-centre spacing difference, the physical dimension of insert 4 changes to some extent, make cold oil turbulization when oil duct 11 flows through, make its radial temperature homogenizing, improved the collaborative of velocity field and heat flow field, improve the radiating efficiency of unit are, the heat dissipation capacity that our experiments show that the utility model gilled radiator improves more than 20%, the transformer of same capability can reduce the horizontal volume of gilled radiator, selects the space that provides bigger for use for the large-scale power transformer cooling device, has reduced cost.

Claims (2)

1, a kind of novel gilled radiator for transformer, comprise some to the chip groups of fins, groups of fins inside is provided with several oil ducts, the oil-in of oil duct and oil-out are provided with respectively on the flange of upper and lower part, upper and lower flange place is provided with oil inlet pipe and flowline, oil inlet pipe and flowline respectively with oil-in and oil-out UNICOM, it is characterized in that: in described oil duct, insert is set.

2, described a kind of novel gilled radiator for transformer as claimed in claim 1 is characterized in that: the cross section ovalize of the oil duct of groups of fins inside, described insert evenly distribute in oil duct, can make oily turbulization when passing through in oil duct.

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