JPS59119808A - Transformer for vehicle - Google Patents

Abstract

PURPOSE:To minimize required capacity of conservator and reduce the size by forming a oil passing hole at a side plate of tank locating on the upper surface position of iron core, corresponding to the position of oil passing groove of iron core at the inside of tank and by providing an oil gauge through such oil passing hole. CONSTITUTION:An oil passing hole 19 is provided at the area corresponding to the upper surface of iron core 1 of the side plate 5a of conservator, an oil gauge glass 13 is tightly arranged, through a packing 17, onto an oil gauge seat 15 provided at the lower side of the oil passing hole 19. When it is fixed to a seat 15, an oil gauge 6 is located to the position corresponding to the upper surface of iron core 1 of the side plate 5a of conservator and thereby an oil level at the upper surface of iron core can be detected. Where the initial oil level is considered as h3, it is no longer necessary to consider the gap h1 between the upper surface of upper plate 3a of tank and the upper surface of iron core 1, and h3 can be made small and accordingly amount of oil initially supplied, namely amount of oil of transformer can be reduced.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a vehicle-use vehicle in which the mounting position of an oil level gauge for detecting the insulating oil level of an oil-immersed transformer installed in the underfloor space of an electric vehicle, etc. has been completely improved. Regarding transformers.

[Technical background of the invention and its problems]

Conventionally, vehicle transformers installed in the limited underfloor space of electric vehicles have adopted an external steel form-fit structure to reduce size and weight. The oil level gauge that detects the oil level is directly attached to the conservator tank.0 Figure 1 is a sectional view of this type of vehicle transformer, and as shown in the figure, the core A of the core 1 and the A place 7 is inserted between the upper plate 3a and the lower plate 3b of the transformer main body tank 3. This place 7 has Bi during setting and is inserted in several places around the core 0. Also, the stacking thickness C of the core 1
A piece of wood 8 is inserted between the direction and the side plates 4a and 4b of the transformer main body tank 3 over the entire circumference of the iron core.

On the other hand, the coil 2 and the side plates 4a and 4 of the transformer main tank
a wedge 9 is inserted between The structure is such that the insulating oil level 11 in the transformer body tank is detected. In addition, 10 is insulating oil, ■Oal
``i insulating oil flow, 20 conservator indoor gas, 21
is the lower beam under the Vehicle Law.

This will be explained with reference to FIG. As already explained in FIG. 1, the places 7 are inserted at several places around the iron core 1, so the places 7 are inserted between the iron core 1 and the main body tank top plate 3a.
There are places where there is no place 7, and the place where there is no place 7 is naturally filled with insulating oil 10. On the other hand, oil passage grooves 8a and 9a are provided at corresponding locations in the scissor tree 8 and the wedge 9, respectively, in order to circulate insulating oil 10 and cool the iron core 1. In addition, the transformer main tank 3
An oil hole 12 is provided in the upper plate 3a between the conservator 5 and the conservator 5, which is blocked by the upper plate 3a.

Then, the insulating oil flows 10a through the oil passage hole J2 and the oil passage grooves 8a, 9a, thereby cooling the iron core 1 and the winding 2.

By the way, a method of attaching the oil level gauge 6 to the vehicle transformer shown in FIGS. 1 and 2 will be explained with reference to FIG. 3. The size of the conservator capacity is generally determined by the amount of insulating oil inside the main tank of the transformer, the operating temperature range of the transformer, and the allowable pressure rise value in the conservator chamber. The transformer main tank 3 and the conservator 5 are isolated by the upper plate 3a of the transformer main tank as shown in FIG. It is customary to consider this as the minimum operating temperature for transformer insulating oil. Therefore, the amount of oil injected into the transformer body tank at room temperature is determined by the expansion coefficient of the insulating oil used, the temperature difference from the set minimum temperature to room temperature, and the internal capacity of the transformer body tank, and is □＋h2 oil level 8″!,
Lubricate at the beginning. The gas chamber number iH□ is determined based on this initial oil supply amount under the conditions described above. In addition, 6 is an oil level gauge, and this oil level gauge 6 includes an oil level gauge glass 13 and an oil level gauge cover 1.
4, oil level dial washer 15, cushion 16, backing 17,
It is composed of mounting bolts 18 and the like.

However, the conventional vehicle transformer described above has the following drawbacks. That is, the installation height of the conservator 5 is determined at the initial Jυ1 oil position determined by 1h2 in Figure 3. Here, h2 is a constant determined by the temperature difference from the lowest operating temperature to room temperature, so h, +
In order to make h2 the minimum allowable value, the distance h1 from the top surface of the iron core to the surface of the main body tank top plate 3a should be shifted to zero. but,
As explained in Fig. 1, the iron core 1 is connected to the upper plate 3 of the main tank.
It is necessary to mechanically fix it to the upper plate 3a and the upper plate 3b via the place 7, and hII'i is indispensable. Therefore, in the conventional conservator oil level cutter 6, the minimum oil level is the dimension h1 from the top surface of the iron core to the main body tank upper plate 3 a i. By the way, from the point of view of the use of the transformer, it is sufficient to ensure the minimum oil level up to the top surface of the iron core, but there is a drawback that adding oil by this dimension h1 increases the height of the conservator accordingly.

[Purpose of the invention]

The present invention was made in order to eliminate the above-mentioned drawbacks, and its purpose is to improve the installation of the oil level gauge and install it as a conservator. To provide a vehicle transformer that has the minimum required capacity and is compact as a whole.

[Summary of the invention]

In order to achieve the above object, the present invention provides a vehicle transformer in which a conservator is disposed at the upper part of the main body tank of the transformer, and an oil level gauge for detecting the oil level in the main body tank is attached. No. 10 leading to the conservator on the tank top plate
A lubrication hole is provided, and a 20th lubrication hole is formed in the side plate of the main body tank corresponding to the position of the iron core lubrication groove inside the main body tank and coincident with the top surface position of the iron core, and this second lubrication hole [Structure of the Invention] An embodiment of the present invention will be described with reference to the drawings.

FIG. 4 shows a cross-sectional view of the oil level gauge mounting position in the vehicle transformer according to the present invention.
The same parts as in FIGS. 3 to 3 are designated by the same reference numerals. That is, although not shown in FIG. 4, the places 7 are inserted at several places around the iron core 1, so there are parts where there are no places 7 between the iron core 1 and the upper plate 3a of the main tank 3. , this part is filled with insulating oil 10. Further, scissors 8 are inserted over the entire circumference of the iron core between the stacked thickness direction of the iron core 1 and the main body tank side plates 4a and 4b. Although the main tank side plate 3a and the conservator side plate 5a are integrally molded in FIG. 4, it goes without saying that they may be molded separately. Furthermore, coil 2
A wedge 9 is inserted between the main body tank side plates 4, a, and 4b.

This scissor tree 8 and wedge 9 each have oil passage grooves 8a.
and 9a are provided, and these oil passage grooves 8a and 9a are provided.
The iron core 1 and the coil 2 are cooled by circulating insulating oil through a. Further, an oil hole 12 is provided in the main tank top plate 3a between the main body tank top plate 3a and the conservator 5 and the main tank top plate 3a. Flow of insulating oil 10
a is carried out through the respective oil passage holes 12 and oil passage grooves 8a, 9a. In addition, since the vehicle transformer main body tank 3 and the conservator 5 are isolated by the main body tank top plate 3a, the surface of the gap dimension h1 between the top surface of the main body tank top plate 3a and the top surface of the iron core 1 is the surface of the transformer main body. Therefore, the amount of oil injected into the main body at normal temperature is determined by the expansion coefficient of the insulating oil, the temperature difference from the set minimum temperature to normal temperature, and the internal capacity of the transformer main body. The oil level is initially lubricated at the oil level position 11 meters from the lowest oil level to h1+h2. The gas chamber capacity H1 is determined under the above conditions based on the initial oil supply amount at this time. Further, the scissor tree 8 and the wedge 9 are provided with oil passage grooves 8a and 9a, as described above, at limited positions set in the configuration in order to allow the insulating oil in the conservator 5 and the insulating oil in the main body tank to pass through. There is. An oil passage hole 19 is provided at a position corresponding to the upper surface of the iron core 1 of the conservator side plate 5a constituting the conservator 5, and an oil level gauge 6 is attached at a corresponding position.

As shown in FIG. 4, this oil level gauge 6 has an oil level gauge glass 13 oil-tightly disposed on a hydraulic dial washer 15 provided below the oil passage hole 19 via a backing 17. An oil level gauge cover 14 is provided on the oil level gauge cover 13. When this is fixed to the seat 15 with a mounting bolt as shown, the oil level gauge 6 is mounted on the conservator side plate 5a at a position corresponding to the upper surface of the iron core 1.

〔Effect of the invention〕

As described above, according to the present invention, the conservator side plate corresponding to the top surface of the core is provided with an oil passage hole for the oil level gauge, so that the oil level on the top surface of the core, that is, the required minimum oil level, can be measured using the oil level gauge. Can be detected.

Therefore, it is only necessary to lubricate the insulating oil at the initial stage by the expansion and contraction of the insulating oil that are affected by the temperature difference from the oil level to room temperature, and the initial oil level position f is h3 as shown in Figure 4.
Then, as shown in Figure 2, there is no longer a need to consider hl, which was considered structurally unreliable.
h3 can be smaller than h□+h2. This reduces the initial oil supply amount, that is, the total amount of transformer oil, so that it is possible to provide a vehicle transformer that is smaller and lighter in size and has a lower conservator height.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional vehicle transformer, Figure 2 is a sectional view of the insulating oil flowing inside the vehicle transformer main body and conservator in Figure 1, and Figure 3 is a sectional view of a conventional vehicle transformer. FIG. 4 is a schematic cross-sectional view of an embodiment of the present invention. 1 Iron core, 2 Coil, 3...Transformer main tank 1.
3a, 3b...Side plate of transformer main tank, 4a14b...
・Top and bottom plates of the transformer body tank, 5...Conservator, 5a...Conservator's (fill plate, 6) Surface position, 8a, 9a...Oil groove, 12.19... Oil hole, 21...Vehicle Act lower beam. (8733) Agent: Patent attorney Yoshiaki Inomata (and 1 others)
Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A conservator is installed above the tank of the transformer body,
In the vehicle transformer equipped with an oil level gauge for detecting the oil level in the main tank, a first oil passage hole communicating with the conservator is provided in the upper plate of the main tank, and Corresponding to the position of the iron core oil passage groove, a 20th oil passage hole is fully formed on the side plate of the main body tank that matches the top surface position of the iron core, and an oil level gauge is provided through this second oil passage hole. A vehicle transformer characterized by: