WO2016056578A1

WO2016056578A1 - Transformer device cooling structure

Info

Publication number: WO2016056578A1
Application number: PCT/JP2015/078448
Authority: WO
Inventors: 石井　眞二; 真伍藤村
Original assignee: Dmg森精機株式会社
Priority date: 2014-10-10
Filing date: 2015-10-07
Publication date: 2016-04-14
Also published as: JP2016081965A

Abstract

[Problem] To provide a transformer device cooling structure that can efficiently discharge, to the outside, the heat generated from a transformer body, and that can prevent water from flowing down into a housing even if water enters from an evacuation port. [Solution] In the present invention, communication ports 9d are formed at a portion near the center of an upper wall 9 of a transformer housing 2. A top plate 11 is disposed so as to cover the upper wall 9. Evacuation ports 11d are formed in a portion of the top plate 11 that, in plan view, is displaced outward from the communication ports 9d. The cooling structure is further provided with a downward flow preventing structure that is formed of inclined surfaces 9b which prevent water, which has entered from the evacuation ports 11d, from flowing down into the transformer housing 2 from the communication ports 9d.

Description

Cooling structure of transformer device

The present invention relates to a cooling structure that efficiently discharges heat generated by a transformer main body to the outside in a transformer device in which the transformer main body is housed in a housing.

As a conventional general transformer device, a drip-proof opening is provided on the side wall of the housing (see, for example, Patent Documents 1 and 2), an air inlet is provided at the lower side of the side wall of the housing, and an exhaust port is provided on the top wall There is one that cools air by naturally circulating air (see, for example, Patent Document 3).

JP 2014-067842 A Special table 2009-524929 Japanese Patent Laid-Open No. 08-130128

In general, the air heated by the heat of the transformer main body is easy to flow upward and difficult to flow in the lateral direction. However, in the conventional structures disclosed in

Patent Documents

1 and 2, since the opening is provided in the side wall of the casing, the heated air is not easily discharged from the opening in the side wall, and efficient cooling cannot be performed. *

Further, in the conventional structure disclosed in Patent Document 3, when water enters from the exhaust port provided in the top wall, it falls into the casing as it is, so there is a possibility that it will be applied to the transformer body, and the transformer body may be damaged. is there. *

The present invention has been made in view of the above-described conventional situation, and is capable of efficiently discharging heat generated from the transformer body to the outside, and preventing water from flowing down into the housing even if water enters from the exhaust port. It is an object to provide a cooling structure for an apparatus.

According to a first aspect of the present invention, there is provided a transformer device including a transformer casing having a peripheral wall and an upper wall disposed in an upper opening of the peripheral wall, and a transformer main body accommodated in the transformer casing. A cooling structure for discharging heat outward, wherein a communication port is formed at a portion near the center of the upper wall of the transformer housing, and a top plate is disposed so as to cover the upper wall, An exhaust port is formed in a portion of the top plate that is displaced outward from the communication port in plan view, and a flow-in preventing structure that prevents water entering from the exhaust port from flowing into the transformer casing from the communication port. It is characterized by being provided. *

According to a second aspect of the present invention, in the cooling structure for a transformer device according to the first aspect, the flow-inhibiting structure has an inclined surface that is inclined obliquely upward from the upper end of the peripheral wall toward the communication port. It is characterized by having it by having. *

According to a third aspect of the present invention, in the cooling structure for a transformer device according to the second aspect, the peripheral wall of the transformer casing is composed of four side walls, and the flow-inhibiting structure includes the upper wall and the four wall surfaces. It is characterized by having four inclined surfaces inclined obliquely upward from the upper end of the side wall toward the communication port. *

According to a fourth aspect of the present invention, in the cooling structure for a transformer device according to the first aspect, the flow-inhibiting structure is constituted by a vertical wall formed so as to surround the communication port. *

According to a fifth aspect of the present invention, in the cooling structure for a transformer device according to any one of the first to fourth aspects, a gap is formed between an outer peripheral lower end of the top plate and an outer peripheral upper end of the transformer casing. It is a feature. *

According to a sixth aspect of the present invention, in the cooling structure for a transformer device according to any one of the first to fifth aspects, the top plate is formed in substantially the same shape and substantially the same size as the transformer casing in a plan view. It is characterized by being.

According to the first aspect of the present invention, the communication port is formed in the portion near the center of the upper wall of the transformer casing, and the exhaust port is formed in the portion of the top plate displaced from the communication port. The air whose temperature has been increased by the above is exhausted to the outside from the communication port through the exhaust port, and abnormal internal temperature increase can be prevented. *

In addition, since a flow prevention structure that prevents water entering from the exhaust port from flowing into the housing from the communication port is provided, it is possible to prevent the water that has entered from flowing into the housing, and water is applied to the transformer body. Thus, the transformer body can be prevented from being damaged. *

According to the invention of claim 2, since the upper wall of the transformer casing has an inclined surface that is inclined obliquely upward toward the communication port, the water that has entered from the exhaust port can be communicated with the communication port with a simple structure. Therefore, it is possible to realize a flow blocking structure that blocks the flow from flowing into the housing, and to prevent the transformer body from being damaged. *

In addition, since the upper wall is inclined, internal convection can be prevented by smoothly guiding the heated air from the communication port to the exhaust port, and abnormal internal temperature rise can be prevented more reliably. *

According to the invention of claim 3, since the upper wall has four inclined surfaces inclined obliquely upward from the upper ends of the four side walls of the transformer casing toward the communication port, a simple structure is provided. Thus, it is possible to realize a flow prevention structure that prevents water entering from the exhaust port from flowing into the housing from the communication port, and it is possible to more reliably prevent water from flowing into the transformer housing. In addition, internal convection can be prevented by more smoothly guiding the heated air from the communication port to the exhaust port, and abnormal internal temperature increase can be more reliably prevented. *

According to the invention of claim 4, since the vertical wall is formed so as to surround the communication port, a flow-inhibiting structure for preventing water entering from the exhaust port from flowing into the housing through a simple structure is provided. This can be realized, and water can be prevented from flowing into the housing from the communication port, thereby preventing the transformer main body from being damaged. *

According to the fifth aspect of the present invention, since the gap is formed between the lower end of the outer peripheral wall of the top plate and the upper end of the outer peripheral wall of the transformer casing, the water that has entered from the exhaust port is surely secured to the outside by a simple structure. Can be discharged. *

According to the invention of claim 6, the top plate is formed in substantially the same shape and the same size as the transformer casing in a plan view, so that a necessary arrangement space for the entire transformer device is provided by providing the top plate. It can avoid becoming large.

It is a front exploded perspective view of the transformer device concerning Example 1 of the present invention. FIG. 2 is a cross-sectional front view of the transformer device (a cross-sectional view taken along line II-II in FIG. 1). FIG. 3 is a cross-sectional side view of the transformer device (a cross-sectional view taken along line III-III in FIG. 1). FIG. 5 is an exploded front perspective view of a transformer device according to Embodiment 2 of the present invention. FIG. 5 is a cross-sectional front view (cross-sectional view taken along the line V-V in FIG. 2) of the transformer device. FIG. 6 is a cross-sectional side view of the transformer device (a cross-sectional view taken along line VI-VI in FIG. 2). It is a front perspective view of the upper wall of the transformer device concerning Example 3 of the present invention. It is a cross-sectional front view (the VIII-VIII sectional view taken on the line of FIG. 7) of the upper wall of the said Example 3. FIG. 9 is a cross-sectional side view of the upper wall of Example 3 (cross-sectional view taken along the line IX-IX in FIG. 7). It is a front perspective view of the upper wall of the transformer device concerning Example 4 of the present invention. It is a section front view (XI-XI line sectional view of Drawing 10) of the upper wall of the example 4 mentioned above.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 3 are diagrams for explaining a cooling structure of a transformer device according to Embodiment 1 of the present invention. *

In the figure, reference numeral 1 denotes a transformer device having a cooling structure according to the first embodiment. The transformer device 1 includes a transformer casing 2 and a transformer main body 3 accommodated in the transformer casing 2. *

The transformer body 3 includes a laminated body 4 in which a W phase 4a, a V phase 4b, and a U phase 4c are stacked in a vertical direction, and a highly rigid inner frame 5. The inner frame 5 includes a base box 6 and a frame body 7 that is disposed on the base box 6 and has a lower end portion fixed to the base box 6 by bolting or the like. *

The base box 6 has a rectangular box shape, and an air introduction port 6b composed of a large number of slits is formed on the side wall 6a, and a communication port 6d is formed on the upper wall 6c. *

The frame main body 7 has a rectangular cylindrical shape. The column portions 7a arranged at the four corners thereof,

midway connection portions

7b and 7b for connecting midway portions in the height direction of the column portions 7a, and upper ends It has the upper end connection part 7c which connects parts, and the lower end connection part 7d which connects lower end parts. *

The laminate 4 is placed on the base box 6 and surrounded by the frame body 7. *

The transformer housing 2 has a rectangular cylindrical peripheral wall 8 extending in the vertical direction and having a lower end opening and an upper end opening, and an upper wall 9 disposed so as to close the upper end opening of the peripheral wall 8. The lower end opening of the peripheral wall 8 is closed by the base box 6. *

The peripheral wall 8 is made of a sheet metal and has a vertically long rectangular front and

rear side walls

8a and 8b, and left and

right side walls

8c and 8d. The front and

rear side walls

8a, 8b are formed wider than the frame body 7, and flanges 8e are bent at the edges. The front and

rear side walls

8a and 8b are fastened and fixed to the support column 7a of the frame body 7 by bolts 10a, and the left and

right side walls

8c and 8d are fastened and fixed to the flange 8e by bolts 10b. ing. Thus, a space A serving as an air flow path is formed between the left and

right side walls

8c and 8d and the frame body 7 and thus the laminate 4. *

The upper wall 9 includes a central portion 9a positioned so as to form a horizontal plane in the central portion in the left-right direction when viewed from the front (see FIG. 2), and left and right of the central portion 9a from the upper ends of the left and

right walls

8c and 8d. The left and right

inclined surfaces

9b and 9b that incline so that the central portion 9a side becomes higher toward the edge, and the front and the front and rear edges of the central portion 9a and the

inclined surfaces

9b and 9b are bent downward. ,

Rear portions

9c and 9c. *

The left and right

inclined surfaces

9b and 9b are in contact with the upper ends of the left and

right walls

8c and 8d of the peripheral wall 8, and the front and

rear portions

9c and 9c are in contact with the upper ends of the front and

rear side walls

8a and 8b. Yes. *

A pair of

communication ports

9d, 9d are formed in a slit shape extending in the front-rear direction at the portion of the upper wall 9 near the central portion 9a of the left and right

inclined surfaces

9b, 9b. *

A top plate 11 is disposed above the upper wall 9. The top plate 11 has the same shape and size as the upper wall 9 in plan view, and covers the upper wall 9. The top plate 11 includes a flat top plate main body 11a, front and

rear walls

11b and 11b, and left and

right walls

11c and 11c which are bent downwardly following the periphery of the top plate main body 11a. . The lower ends of the front and rear walls 11 b of the top plate 11 are in contact with the front and rear edges of the upper wall 9, and the lower ends of the left and

right walls

11 c and 11 c of the top plate 11 and the left of the upper wall 9. , Gaps a and a are formed between the right edge and the right edge. *

Furthermore, the top plate body 11a of the top plate 11 has a plurality of slits extending in the front and rear directions at the positions displaced in the left and right directions from the

communication ports

9d and 9d of the upper wall 9. 11d is formed. In other words, the

exhaust ports

11d and 11d are arranged so as to be displaced outward so as not to overlap the

communication ports

9d and 9d in plan view. *

A pair of

suspension bolts

12 and 12 are mounted on the front and rear end portions of the upper end connection portion 7c of the frame body 7 for lifting and transporting the entire device 1 when the transformer device 1 is installed. . The suspension bolt 12 passes through the top plate body 11a and the central portion 9a of the upper wall 9, and is screwed and fixed to a nut member 12a fixed to the upper end connection portion 7c. *

A flange portion 12c is formed at the lower edge of the head 12b of the suspension bolt 12. When the suspension bolt 12 is screwed into the nut member 12a, the flange portion 12c presses the top plate 11. As a result, the top plate 11 and the upper wall 9 are pressed and fixed to the upper end of the peripheral wall 8 in a stacked manner. *

According to the first embodiment, the

communication ports

9d and 9d are formed in the central portion of the upper wall 9 of the transformer housing 2, and the top plate 11 is displaced left and right outward from the

communication ports

9d and 9d. Since the

exhaust ports

11d and 11d are formed in the part, the air heated by the heat from the transformer body 3 is exhausted outward from the communication port 9d through the exhaust port 11d, thereby preventing an abnormal temperature rise inside. it can.

Moreover, the water which entered from the exhaust port 11d flows down into the housing | casing 2 from the communication port 9d by the inclined surface 9b which inclines the upper wall 9 of the transformer housing | casing 2 diagonally upward toward the said communication port 9d. Since the flow-in prevention structure is configured to prevent the water from entering, the water that has entered can be prevented from flowing into the housing 2, and the transformer body 3 can be prevented from being splashed by water. Can be prevented. *

Further, since the inclined surface 9b is provided on the upper wall 9, internal convection can be prevented by smoothly guiding the heated air from the communication port 9d to the exhaust port 11d, and abnormal internal temperature rise can be prevented more reliably. it can. *

Furthermore, since a gap a is formed between the lower end of the left and

right walls

11c and 11c of the top plate 11 and the left and right edge portions of the upper wall 9, the water that has entered from the exhaust port 11d can be made into a simple structure. It can be reliably discharged outside. *

Further, since the top plate 11 is formed in substantially the same shape and the same size as the transformer housing 2 in plan view, the provision of the top plate 11 avoids an increase in the arrangement space of the entire transformer device 1. it can. *

Further, since the laminated body 4 of each phase is accommodated in the inner frame 5 and the suspension bolt 12 is screwed and fixed to the upper end portion of the inner frame 5, the transformer body 3, which is a heavy object, is attached to the highly rigid inner frame 5. As compared with the case where the transformer housing 2 is lifted, the transformer housing 2 can be configured with a thin plate or the like with low rigidity, and an increase in the weight and cost of the entire apparatus can be avoided. *

Furthermore, since the suspension bolt 12 is screwed into the nut member 12a, the top plate 11 is pressed by the flange portion 12c, and the top plate 11 and the upper wall 9 are pressed and fixed to the upper end of the peripheral wall 8. The suspension bolt 12 can also be used for the connection between the plate 11 and the upper wall 9 and the peripheral wall 8, the structure can be simplified, the number of parts and the cost can be reduced by eliminating the need for a dedicated connection member.

4 to 6 are diagrams for explaining a second embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts. *

In the first embodiment, the upper wall 9 of the transformer casing 2 is configured separately from the peripheral wall 8. However, in the second embodiment, the upper wall 9 'of the transformer casing 2 is formed integrally with the peripheral wall 8. It is. *

That is, left and right inclined surfaces 9b 'and 9b' are bent and formed at the upper end portions of the left and

right walls

8c and 8d of the peripheral wall 8 so as to form an inclined surface whose central side is raised. A clearance between the tip of the inclined surface 9b 'and the upper end connection portion 7c of the inner frame 7 serves as a communication port 9d'. *

In the second embodiment, the upper wall 9 'of the transformer housing 2 is constituted by the inclined surface 9b' formed by bending the upper end portions of the left and

right side walls

8c, 8d of the peripheral wall 8, so that the upper wall is a separate part. Compared to the case, the number of parts can be reduced and the structure can be simplified.

7 to 9 are diagrams for explaining a third embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts. *

In the first embodiment, the upper wall 9 of the transformer housing 2 has the left and right

inclined surfaces

9b and 9b which are inclined from the left and

right side walls

8c and 8d side of the peripheral wall 8 to the communication port 9d side. However, the upper wall 9 ″ in the third embodiment further has the

inclined surfaces

9 e and 9 e before and after the peripheral wall 8 and before and after inclining from the

rear side walls

8 a and 8 b to the center side. That is, the upper wall 9 ″ of the third embodiment forms a quadrangular frustum having four

inclined surfaces

9b, 9b and 9e, 9e inclined from the upper end of the peripheral wall 8 toward the center. *

In the third embodiment, the upper wall 9 ″ is made to have four

inclined surfaces

9b, 9b and 9e, which are inclined obliquely upward from the upper ends of the four side walls 8a to 8d of the transformer casing toward the communication port 9d. 9e is provided so that a flow prevention structure that prevents water entering from the exhaust port 11d from flowing into the housing 2 from the communication port 9d can be realized by a simple structure, and water can be introduced into the transformer housing 2. It is possible to prevent the flow down more reliably. Further, by guiding the heated air more smoothly from the communication port 9d to the exhaust port 11d, internal convection can be prevented, and abnormal internal temperature rise can be prevented more reliably.

10 to 11 are diagrams for explaining a fourth embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts. *

inclined surfaces

9b and 9b which are inclined from the left and

right side walls

8c and 8d side of the peripheral wall 8 to the communication port 9d side. The upper wall 19 of the fourth embodiment has a horizontal portion 19a that is formed horizontally without being inclined, and a side wall 19b that is bent downward from the periphery of the horizontal portion 19a. Have A communication port 19d is formed near the center of the horizontal portion 19a, and the periphery of the communication port 19d is surrounded by a vertical wall 19c, thereby constituting the flow-down prevention structure. *

In the fourth embodiment, since the vertical wall 19c is formed so as to surround the communication port 19d, it is possible to prevent water entering from the exhaust port 11d from flowing into the housing 2 from the communication port 19d by a simple structure. Damage to the transformer body can be prevented.

1 Transformer device 2 Transformer housing 3 Transformer body 8

Peripheral walls

8a, 8b Front,

rear side walls

8c, 8d Left, right side walls 9, 9 ', 9' ', 19

Upper walls

9b, 9e

Inclined surfaces

9d, 9d', 19d Exit 11 Top plate 11c Vertical wall 11d Exhaust outlet a Gap

Claims

In a transformer device including a transformer casing having a peripheral wall and an upper wall disposed in an upper opening of the peripheral wall, and a transformer main body accommodated in the transformer casing, heat from the transformer main body is discharged outward. A cooling structure configured as described above, wherein a communication port is formed at a portion near the center in the width direction of the upper wall of the transformer casing, and a top plate is disposed so as to cover the upper wall. An exhaust port is formed at a portion displaced outward from the communication port as viewed, and a flow-in preventing structure is provided to prevent water entering from the exhaust port from flowing into the transformer casing from the communication port. The cooling structure of the transformer device characterized by this.
2. The cooling structure for a transformer device according to claim 1, wherein the flow-down prevention structure includes an inclined surface that is inclined obliquely upward from the upper end of the peripheral wall toward the communication port. A cooling structure for a transformer device, characterized in that
3. The cooling structure for a transformer device according to claim 2, wherein a peripheral wall of the transformer casing is configured by four side walls, and the flow-inhibiting structure is configured such that the upper wall extends from the upper end of the four side walls to the communication port. The transformer structure cooling structure is characterized by having four inclined surfaces that are inclined obliquely upward toward.
2. The cooling structure for a transformer device according to claim 1, wherein the flow blocking structure is configured by a vertical wall formed to surround the communication port. 3.
5. The cooling structure for a transformer device according to claim 1, wherein a gap is formed between an outer peripheral lower end of the top plate and an outer peripheral upper end of the transformer casing. Construction.
6. The transformer cooling structure according to claim 1, wherein the top plate is formed in substantially the same shape and the same size as the transformer casing in a plan view. Equipment cooling structure.