Simple type cooling apparatus of electric transformer for electric railway

摘要

The present invention relates to an electric transformer installed in an electric railway vehicle, provided with high-pressure and low-pressure coils inside, and supplying electric power necessary for the electric railway vehicle by stepping down the voltage, and liquid is injected into the interior, vaporized by latent heat of condensation, and cold air is produced. When it meets and cools, it is a cooling member that turns into a liquid and cools it. One side is disposed adjacent to the high and low pressure coils in the electric transformer, respectively, and heated, and the other side extending from the uniaxial part is exposed to the outside through the upper part of the electric transformer. A simple cooling device for an electric railroad transformer, comprising: a heat pipe that is installed to generate heat; and a plurality of lateral heat sinks installed on the other side of the heat pipe exposed to the outside through the upper part of the electric transformer and dissipating heat to the atmosphere; The electric transformer 100 includes a front curved portion 111 formed on the front of the housing 110, a rear curved portion 112 formed on the rear, and at least one coupling piece 120 formed on the bottom surface. and the heat pipe 200 is installed inside the electric transformer 100 to cool the high-pressure coil, and the upper portion is an inlet port 211 through which a refrigerant is introduced and an outlet port 212 through which the refrigerant is discharged. a U-shaped front internal heat pipe 210 disposed in front of the housing 110 of the electric transformer 100; It is installed inside the electric transformer 100 to cool the low-pressure coil, and the upper part has an inlet port 221 through which refrigerant is introduced and an outlet port 222 through which refrigerant is discharged, Housing 110, a U-shaped rear inner heat pipe 220 disposed at the inner rear; An inlet port 231 connected to the outlet port 212 of the front internal heat pipe 210 at the upper portion, and an outlet port 232 connected to the inlet port of the front internal heat pipe built in another adjacent electric transformer. a U-shaped front external heat pipe 230 disposed in the front outside of the electric transformer 100; An inlet port 241 connected to the outlet port 222 of the rear internal heat pipe 220 at the upper portion, and an outlet port 242 connected to the inlet port of the rear internal heat pipe built in another electric transformer adjacent thereto; a U-shaped rear external heat pipe 240 disposed on the external rear side of the electric transformer 100; The outlet port 212 and the inlet port of the front internal heat pipe 210 are fastened to the threaded portions formed on the upper outer peripheral surfaces of the inlet port 231 and the outlet port 232 of the front external heat pipe 230 and corresponding thereto. (211) and a front joint nut connected to (250); The outlet port 222 and the inlet port of the rear inner heat pipe 220 corresponding thereto are fastened to the threaded portions formed on the upper outer peripheral surfaces of the inlet port 241 and the outlet port 222 of the rear external heat pipe 240 . (221) and the rear joint nut (260) for connecting; Each intervening between the front external heat pipe 230 and the front internal heat pipe 210 and between the rear external heat pipe 240 and the rear internal heat pipe 220 filters foreign substances contained in the refrigerant flowing therein a filter 270 that does; The O-ring 280 is installed to be embedded in the inner circumferential surface of the joint nut 250 and 260 to maintain airtightness and watertightness between each heat pipe 210 , 220 , 230 , 240 and the joint nut 250 , 260 . ) is installed in close contact with the front curved portion 111 between the electric transformer 100 and another adjacent electric transformer, and a plurality of unit heat sinks 330 pass therethrough. phosphorus front heat sink 310; It is installed in close contact with the rear curved portion 112 between the electric transformer 100 and another adjacent electric transformer, and a plurality of unit heat sinks 330 are stacked by the rear external heat pipe 240 passing therethrough. Consists of a transverse heat sink 320; the unit heat sink 330 has curved portions 331 formed on both sides so as to be in close contact with the front curved portion 111 or the rear curved portion 112, and between the both curved portions A slot 332 is formed in the front-rear direction, and a pair of through-holes 333 through which the front external heat pipe 230 or the rear external heat pipe 240 passes are formed on both sides of the slot 332, A space protrusion 334 for securing a space away from another unit heat sink is formed on the bottom surface, and a recessed step 335 is provided on both sides of one end, and the electric transformer 100 and other electric adjacent thereto A longitudinal heat sink 400 is installed between the transformers, the front end of the longitudinal heat sink 400 is fitted into the slot 332 of the front transverse heat sink 310, and the rear end of the rear transverse heat sink 320 Including fitting into the slot 310, and further comprising a rectangular frame-shaped longitudinal heat sink bracket 500 installed in the central portion of the longitudinal heat sink 400, the front end and the rear end of the longitudinal heat sink bracket 500, the It further comprises that the recessed step 335 of the unit heat sink 330 is engaged to be engaged, and is located in the lower part of the electric transformer 100, but the coupling piece 120 of the electric transformer is inserted into the upper surface by a bolt The coupling piece insertion hole 610 to be fastened is provided, and one or both ends of the simple cooling device of the electric railroad electric transformer further comprising a lateral connector 600 fastened by a bolt to the lower side of the longitudinal heat sink 400. will be. According to the present invention, in using a heat pipe cooling method using the condensed heat of the working fluid, the installation structure of a plurality of electric transformers or heat sinks is simplified, so that the working time is shortened and the working efficiency is further improved, and the electric railway The cooling efficiency can be further maximized by more effectively cooling the heat generated by the electric transformer installed in the limited space of the