Transformer arrangement

Abstract

A transformer device includes a transformer (41) including a core (42) and a coil (46), a hoist mounting portion (32) disposed at a position higher than the coil (46) and connected to the core (42), and a cover (21) forming an internal space (110) and connected to the hoist mounting portion (32). A hoist for suspending the transformer device including the transformer (41) and the cover (21) can be mounted to the hoist mounting portion (32). The cover (21) is provided with a first opening portion (27) located at a position lower than a first phase transformer (41W) and communicating the internal space (110) with a space outside thereof, and a second opening portion (26) located at a position higher than a third phase transformer (41U) and communicating the internal space (110) with a space outside thereof. An air flow is formed which enters the internal space (110) through the first opening portion (27) and is discharged to the space outside the internal space (110) through the second opening portion (26).

Description

Technical Field

[0001] This invention relates to a transformer device. Background Technology

[0002] For example, Japanese Patent Application Publication No. 2016-81965 (Patent Document 1) discloses a transformer assembly comprising a laminated body formed by stacking W-phase, V-phase, and U-phase in a vertical direction, and a high-rigidity inner frame. The inner frame has a base box for supporting the laminated body and a frame body disposed on the base box and surrounding the laminated body. A pair of suspension bolts for lifting and transporting the transformer assembly are connected to the upper end of the frame body.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-81965 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In the transformer assembly disclosed in Patent Document 1, a pair of suspension bolts are used to connect the transformer assembly to the frame body surrounding the transformer core when lifting the transformer assembly. However, in such a structure, since the large weight of the transformer acts on the frame body, it is necessary to firmly install the entire frame body surrounding the laminated structure. As a result, the manufacturing cost of the transformer assembly may increase.

[0008] Therefore, the object of the present invention is to solve the above-mentioned problems and provide a transformer device that can reduce manufacturing costs in a structure that takes into account the lifting operation of the transformer device.

[0009] Solution for solving the problem

[0010] One embodiment of the present invention provides a transformer assembly comprising: a transformer including a core and a coil wound on the core; a lifting device mounting portion disposed above the coil and connected to the core; and a housing forming an internal space for housing the transformer and connected to the lifting device mounting portion. A lifting device for suspending the transformer assembly including the transformer and the housing can be mounted on the lifting device mounting portion. The transformer includes a first-phase transformer, a second-phase transformer stacked above the first-phase transformer, and a third-phase transformer stacked above the second-phase transformer. The lifting device mounting portion is connected to the core of the third-phase transformer. The transformer assembly further includes: a first connecting member connecting the cores of the first-phase transformer and the second-phase transformer; a second connecting member connecting the cores of the second-phase transformer and the third-phase transformer; and a lower frame disposed below and connected to the first-phase transformer. The housing is supported by the lifting device mounting portion and the lower frame. The enclosure includes: a first opening located below the first-phase transformer and communicating between the interior space and the space outside the interior space; and a second opening located above the third-phase transformer and communicating between the interior space and the space outside the interior space. An airflow is formed that enters the interior space through the first opening and exits to the space outside the interior space through the second opening.

[0011] Another technical solution of the present invention includes a transformer device comprising: a transformer having a core and a coil wound on the core; and a lifting device mounting part disposed above the coil and connected to the core, capable of mounting a lifting device for suspending the transformer device.

[0012] With this transformer assembly configuration, by connecting the lifting device mounting section, which allows for the installation of lifting devices, to the transformer core, the large weight of the transformer can be applied to the lifting device mounting section, which is positioned above the coils, when the transformer assembly is lifted. Therefore, considering the lifting operation of the transformer assembly, the manufacturing cost of the transformer assembly can be reduced.

[0013] Alternatively, preferably, the transformer includes a first-phase transformer, a second-phase transformer stacked above the first-phase transformer, and a third-phase transformer stacked above the second-phase transformer. A lifting device mounting section is connected to the core of the third-phase transformer. The transformer assembly further includes: a first connecting member that connects the cores of the first-phase transformer and the second-phase transformer; and a second connecting member that connects the cores of the second-phase transformer and the third-phase transformer.

[0014] With this transformer assembly configuration, when lifting the transformer assembly, the large weight of the transformer, which includes the stacked first-phase transformer, second-phase transformer, and third-phase transformer, can be applied to the lifting device mounting section.

[0015] Additionally, preferably, the transformer assembly further includes: a lower frame disposed below and connected to the first phase transformer; and a housing that forms an internal space for accommodating the first phase transformer, the second phase transformer, and the third phase transformer and is supported by the lifting device mounting part and the lower frame.

[0016] With this transformer assembly configuration, the first-phase transformer, the second-phase transformer, and the third-phase transformer can be frameless by utilizing the lifting mounting section and the lower frame supporting the enclosure. This simplifies the structure of the transformer assembly.

[0017] Furthermore, preferably, the enclosure includes: a first opening located below the first-phase transformer and communicating between the interior space and the space outside the interior space; and a second opening located above the third-phase transformer and communicating between the interior space and the space outside the interior space. This creates an airflow that enters the interior space through the first opening and exits to the space outside the interior space through the second opening.

[0018] In this transformer configuration, since the first-phase, second-phase, and third-phase transformers are frameless, the air used for cooling can flow more smoothly within the internal space. This improves the transformer's cooling efficiency.

[0019] Additionally, preferably, the transformer assembly also includes electrical equipment disposed below the first-phase transformer and supported by a lower frame.

[0020] With this type of transformer assembly, electrical equipment can be installed using the space below the first-phase transformer.

[0021] In addition, preferably, the transformer assembly also includes a third connecting member, which is connected to the cover as a component of either the lifting device mounting part or the lower frame, and can be adjusted in position according to the relative positional relationship between the component and the cover.

[0022] With this transformer assembly, by adjusting the position of the third connecting member, the relative positional misalignment between the member and the enclosure can be absorbed. This facilitates the installation of the enclosure.

[0023] Alternatively, preferably, the transformer comprises a first-phase transformer, a second-phase transformer, and a third-phase transformer arranged horizontally. The lifting device is connected to the core of the first-phase transformer, the core of the second-phase transformer, and the core of the third-phase transformer.

[0024] With this configuration, when the transformer assembly is lifted, the large weight of the transformer, which includes the first-phase transformer, the second-phase transformer, and the third-phase transformer arranged in the horizontal direction, can be applied to the lifting device mounting section.

[0025] The effects of the invention

[0026] As explained above, according to the present invention, it is possible to provide a transformer device that can reduce manufacturing costs in a structure that takes into account the lifting operation of the transformer device. Attached Figure Description

[0027] Figure 1 This is a perspective view of a transformer device according to Embodiment 1 of the present invention.

[0028] Figure 2 It means Figure 1 A cross-sectional view of the internal structure of the transformer device.

[0029] Figure 3 It means Figure 1 A three-dimensional diagram of the transformer and frame structure of the transformer device.

[0030] Figure 4 It means Figure 1 The front view of the transformer and frame structure of the transformer device.

[0031] Figure 5 It means Figure 1 The left view of the transformer and frame structure of the transformer device in the image.

[0032] Figure 6 It means Figures 3 to 5 A partial exploded assembly diagram of the transformer and frame structure.

[0033] Figure 7 It means Figures 3 to 5 An exploded assembly diagram of the transformer and the remaining parts of the frame structure.

[0034] Figure 8 It is an exploded assembly diagram showing the upper frame, the third connecting member, and the cover.

[0035] Figure 9 This is a three-dimensional diagram representing the lower frame.

[0036] Figure 10 This is a cross-sectional view showing the transformer device according to Embodiment 2 of the present invention.

[0037] Figure 11 It means along Figure 10 A cross-sectional view of the transformer unit observed in the direction of the arrow on the XI-XI line. Detailed Implementation

[0038] Embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the drawings referred to below, the same or equivalent components are labeled with the same reference numerals.

[0039] (Implementation Method 1)

[0040] Figure 1 This is a perspective view of a transformer device according to Embodiment 1 of the present invention. Figure 2 It means Figure 1 A cross-sectional view of the internal structure of the transformer device.

[0041] Figure 3 It means Figure 1 A three-dimensional diagram of the transformer and frame structure of the transformer device. Figure 4 It means Figure 1 The front view of the transformer and frame structure of the transformer device. Figure 5 It means Figure 1 The left view of the transformer and frame structure of the transformer device in the image. Figure 6 It means Figures 3 to 5 A partial exploded assembly diagram of the transformer and frame structure. Figure 7 It means Figures 3 to 5 An exploded assembly diagram of the transformer and the remaining parts of the frame structure.

[0042] Reference Figures 1 to 7 The transformer device 100 of this embodiment is used in machine tools such as lathes, machining centers, composite machining centers with turning and milling functions, or AM / SM hybrid machining centers capable of performing additive manufacturing (AM) and subtractive manufacturing (SM) machining of workpieces.

[0043] As an example, the transformer device 100 is attached to a machine tool that, when outputting a machine tool manufactured in a first country with a commercial power supply of a first voltage to a second country with a commercial power supply of a second voltage, serves as a device for transforming the second voltage supplied to the machine tool in the second country into a first voltage that the machine tool can use.

[0044] Furthermore, in the figures, for ease of explanation of the structure of the transformer device 100, "front," "rear," "right," and "left" are shown, but the relationship between these directions and the configuration of the internal structure of the transformer device 100 is not particularly limited. "Above" and "below" are also shown in the figures. The side where the roof of the factory, etc., where the transformer device 100 is installed is "above," and the side where the ground of the factory, etc., where the transformer device 100 is installed is "below."

[0045] The transformer assembly 100 includes a transformer 41. The transformer 41 constitutes the main body of the transformer assembly 100, which raises or lowers the voltage. The transformer 41 includes a core 42 and a coil 46.

[0046] Core 42 is made of magnetic material. For example... Figure 6 and Figure 7 As shown, the core 42 has a rectangular cylindrical shape. A hollow portion 47 is provided in the core 42.

[0047] The core 42 has a first longitudinal rib 48, a first transverse rib 43, a second longitudinal rib 49, and a second transverse rib 44. The first longitudinal rib 48, the first transverse rib 43, the second longitudinal rib 49, and the second transverse rib 44 are arranged to surround the hollow portion 47.

[0048] The first transverse rib 43 and the second transverse rib 44 extend in a horizontal (front-to-back) longitudinal direction. The first transverse rib 43 and the second transverse rib 44 are arranged separately in a vertical direction. The first longitudinal rib 48 and the second longitudinal rib 49 extend in a vertical (front-to-back) longitudinal direction. The first longitudinal rib 48 and the second longitudinal rib 49 are arranged separately in a horizontal (front-to-back) direction. The upper and lower ends of the first longitudinal rib 48 are connected to the first transverse rib 43 and the second transverse rib 44, respectively. The upper and lower ends of the second longitudinal rib 49 are connected to the first transverse rib 43 and the second transverse rib 44, respectively.

[0049] The core 42 has a top surface 42a and a bottom surface 42b. The top surface 42a is formed by an upward-facing horizontal surface. The top surface 42a is located in the first transverse rib 43. The bottom surface 42b is formed by a downward-facing horizontal surface. The bottom surface 42b is located in the second transverse rib 44.

[0050] The first transverse rib 43 has a first side surface 43c and a second side surface 43d. The first side surface 43c is formed by a vertical surface facing the horizontal direction (left). The second side surface 43d is disposed on the back side of the first side surface 43c. The second side surface 43d is formed by a vertical surface facing the horizontal direction (right) opposite to the first side surface 43c. The second transverse rib 44 has a third side surface 44c and a fourth side surface 44d. The third side surface 44c is formed by a vertical surface facing the horizontal direction (left). The fourth side surface 44d is disposed on the back side of the third side surface 44c. The fourth side surface 44d is formed by a vertical surface facing the horizontal direction (right) opposite to the third side surface 44c.

[0051] The core 42 is provided with a first insertion hole 91 and a second insertion hole 92. The first insertion hole 91 is located in the first transverse rib 43. The first insertion hole 91 is formed by a through hole that passes between the first side surface 43c and the second side surface 43d. Multiple first insertion holes 91 are provided in the first transverse rib 43. The multiple first insertion holes 91 are arranged separately from each other in the horizontal direction (front-back direction). The second insertion hole 92 is located in the second transverse rib 44. The second insertion hole 92 is formed by a through hole that passes between the third side surface 44c and the fourth side surface 44d. Multiple second insertion holes 92 are provided in the second transverse rib 44. The multiple second insertion holes 92 are arranged separately from each other in the horizontal direction (front-back direction).

[0052] The coil 46 is constructed by winding a conductor around the core 42. The conductor is, for example, a flat wire with a rectangular cross-section.

[0053] Coil 46 consists of an input-side coil (primary-side coil) and an output-side coil (secondary-side coil). The input-side coil 46 is configured to surround either the first longitudinal rib 48 or the second longitudinal rib 49. The output-side coil 46 is configured to surround the other of the first longitudinal rib 48 and the second longitudinal rib 49. The first transverse rib 43 and the second transverse rib 44 are exposed from coil 46.

[0054] The transformer device 100 has a U-phase transformer 41U, a V-phase transformer 41V, and a W-phase transformer 41W as transformers 41.

[0055] The U-phase transformer 41U, V-phase transformer 41V, and W-phase transformer 41W are stacked vertically. The V-phase transformer 41V (the second phase transformer) is stacked above the W-phase transformer 41W (the first phase transformer). The U-phase transformer 41U (the third phase transformer) is stacked above the V-phase transformer 41V (the second phase transformer).

[0056] like Figure 6 and Figure 7 As shown, the V-phase transformer 41V and the W-phase transformer 41W are configured such that the bottom surface 42b of the core 42 of the V-phase transformer 41V and the top surface 42a of the core 42 of the W-phase transformer 41W are opposite to each other in the vertical direction. The U-phase transformer 41U and the V-phase transformer 41V are configured such that the bottom surface 42b of the core 42 of the U-phase transformer 41U and the top surface 42a of the core 42 of the V-phase transformer 41V are opposite to each other in the vertical direction.

[0057] Furthermore, there is no particular limitation on the stacking order of the U-phase transformer 41U, the V-phase transformer 41V, and the W-phase transformer 41W in the vertical direction.

[0058] The transformer assembly 100 also has a first connecting member 53. The first connecting member 53 connects the core 42 of the W-phase transformer 41W and the core 42 of the V-phase transformer 41V. The first connecting member 53 is made of metal. The first connecting member 53 is constructed of a metal plate.

[0059] The first connecting member 53 has a first angle steel 54 and a second angle steel 55. The first angle steel 54 and the second angle steel 55 are composed of L-shaped angle steel.

[0060] Angle steel 54 and angle steel 55 overlap each other vertically in opposite orientations. Angle steel 54 and angle steel 55 are connected to each other by fasteners (not shown). Angle steel 54 is fastened to the second transverse rib 44 of the core 42 of the V-phase transformer 41V by bolts or other fasteners (not shown). Angle steel 55 is fastened to the first transverse rib 43 of the core 42 of the W-phase transformer 41W by bolts or other fasteners (not shown).

[0061] The first connecting members 53 (first angle steel 54 and second angle steel 55) are arranged as a pair, separated by the cores 42 of the W-phase transformer 41W and the V-phase transformer 41V. The first angle steel 54, which is arranged as a pair, is fastened to the second transverse rib 44 of the core 42 of the V-phase transformer 41V by fastening members such as bolts inserted into the second insertion hole 92 of the core 42 of the V-phase transformer 41V. The second angle steel 55, which is arranged as a pair, is fastened to the first transverse rib 43 of the core 42 of the W-phase transformer 41W by fastening members such as bolts inserted into the first insertion hole 91 of the core 42 of the W-phase transformer 41W.

[0062] The transformer assembly 100 also has a second connecting member 50. The second connecting member 50 connects the core 42 of the V-phase transformer 41V and the core 42 of the U-phase transformer 41U. The second connecting member 50 is made of metal. The second connecting member 50 is constructed of a metal plate.

[0063] The second connecting member 50 connects the core 42 of the V-phase transformer 41V and the core 42 of the U-phase transformer 41U in the same manner as the first connecting member 53, which connects the core 42 of the W-phase transformer 41W and the core 42 of the V-phase transformer 41V.

[0064] The second connecting member 50 has a third angle steel 51 corresponding to the first angle steel 54 of the first connecting member 53, and a fourth angle steel 52 corresponding to the second angle steel 55 of the first connecting member 53. The third angle steel 51 and the fourth angle steel 52 are connected to each other by fastening members such as bolts (not shown). The third angle steel 51 is fastened to the second transverse rib 44 of the core 42 of the U-phase transformer 41U by fastening members such as bolts (not shown). The fourth angle steel 52 is fastened to the first transverse rib 43 of the core 42 of the V-phase transformer 41V by fastening members such as bolts (not shown).

[0065] The second connecting member 50 (the third angle steel 51 and the fourth angle steel 52) is set as a pair on the left and right, separated by the core 42 of the V-phase transformer 41V and the U-phase transformer 41U.

[0066] Furthermore, this embodiment describes a case where the first connecting member 53 and the second connecting member 50 are each composed of a combination of two L-shaped angle steels, but it is not limited to this. The first connecting member and the second connecting member of the present invention may also be, for example, composed of a flat plate extending across the core of an adjacent transformer.

[0067] Figure 8 This is an exploded assembly diagram showing the upper frame, the third connecting member, and the cover. (Refer to...) Figures 1 to 8 The transformer assembly 100 also has an upper frame 32 (suspension mounting part) and a third connecting member 61.

[0068] The upper frame 32 is connected to the core 42. The upper frame 32 is positioned above the coil 46 wound around the core 42. The upper frame 32 is configured to accommodate a lifting device 200 for suspending the transformer assembly 100.

[0069] The upper frame 32 is connected to the core 42 of the U-phase transformer 41U. The upper frame 32 is connected to the first transverse rib 43 of the core 42 of the U-phase transformer 41U. The upper frame 32 is connected to the core 42 in the U-phase transformer 41U above the coil 46. The upper frame 32 is made of metal. The upper frame 32 is constructed from metal plates.

[0070] The upper frame 32 has a longitudinal plate portion 33, an upper plate portion 34, and a nut 31. The longitudinal plate portion 33 is composed of a flat plate orthogonal to the horizontal direction (left-right direction). The longitudinal plate portion 33 is fastened to the first transverse rib portion 43 of the core 42 of the U-phase transformer 41U by fastening members such as bolts (not shown). The longitudinal plate portion 33 extends upward from the first transverse rib portion 43. The lower end portion 33u of the longitudinal plate portion 33 is located above the upper end portion 46s of the coil 46 of the U-phase transformer 41U. The lower end portion 33u of the longitudinal plate portion 33 is opposite to the upper end portion 46s of the coil 46 of the U-phase transformer 41U in the vertical direction.

[0071] The upper plate portion 34 is composed of a flat plate orthogonal to the vertical direction. The upper plate portion 34 is located at a position where it bends from the upper end of the longitudinal plate portion 33 in the left-right direction. The upper plate portion 34 and the longitudinal plate portion 33 together form a corner portion at a 90° angle. The upper plate portion 34 is disposed on the top surface 42a of the core 42 of the U-phase transformer 41U.

[0072] Nut 31 is fixed to the upper plate 34. Nut 31 is welded to the bottom surface of the upper plate 34 as a welding nut. Nut 31 can fasten the lifting device 200 used to suspend the transformer device 100.

[0073] As Figure 1 In one example, the lifting device 200 for suspending the transformer assembly 100 is an eye bolt, which includes a ring portion capable of hooking a metal wire or hook and a threaded portion threaded into a nut 31. The lifting device 200 may also be a T-bolt, which includes a horizontal shaft portion capable of hooking a metal wire or hook and a threaded portion threaded into a nut 31.

[0074] The upper frame 32 is arranged as a pair on the left and right, separated by the first transverse rib 43 of the core 42 of the U-phase transformer 41U. The longitudinal plate portion 33 of the upper frame 32, which is arranged as a pair on the left and right, is fastened to the first transverse rib 43 of the core 42 of the U-phase transformer 41U by fastening members such as bolts inserted into the first insertion hole 91 of the core 42 of the U-phase transformer 41U.

[0075] The third connecting member 61 connects the upper frame 32 and the cover 21 (side cover 23, rear cover 24) described later. Furthermore, the construction of the third connecting member 61 will be described in detail later.

[0076] Figure 9 This is a three-dimensional diagram showing the lower frame. (Refer to...) Figures 1 to 9 The transformer assembly 100 also includes a lower frame 71 and an angle steel 56. The lower frame 71 is positioned below the W-phase transformer 41W. The lower frame 71 is connected to the W-phase transformer 41W.

[0077] The lower frame 71 is installed on the ground of a factory or similar facility where the transformer assembly 100 is installed. The lower frame 71 is connected to the core 42 of the W-phase transformer 41W. The lower frame 71 is connected to the second transverse rib 44 of the core 42 of the W-phase transformer 41W.

[0078] The lower frame 71 is connected to the W-phase transformer 41W via angle steel 56. Angle steel 56 is constructed of L-shaped angle steel. Angle steel 56 is fastened to the second transverse rib 44 of the core 42 of the W-phase transformer 41W by bolts or other fastening components (not shown). Angle steel 56 is fastened to the lower frame 71 by bolts or other fastening components (not shown). Angle steel 56 is arranged in a pair, separated by the second transverse rib 44 of the core 42 of the W-phase transformer 41W.

[0079] The lower frame 71 is composed of a frame member with a cuboid shape. The lower frame 71 has a front surface 73, a left side surface 74, a right side surface 75, an upper surface 76, a rear surface 77, and a lower surface 78.

[0080] A front surface portion 73 is disposed on the front side of a lower frame 71 with a cuboid shape. The front surface portion 73 is composed of a flat plate orthogonal to the front-rear direction. A left side portion 74 is disposed on the left side of the lower frame 71 with a cuboid shape. An upwardly opening portion 74p is provided on the left side portion 74. The left side portion 74 has a frame shape extending along the front edge, lower edge, and rear edge of the opening portion 74p. A right side portion 75 is disposed on the right side of the lower frame 71 with a cuboid shape. An upwardly opening portion 75p is provided on the right side portion 75. The right side portion 75 has a frame shape extending along the front edge, lower edge, and rear edge of the opening portion 75p.

[0081] The upper surface portion 76 is positioned above the lower frame 71, which has a cuboid shape. The upper surface portion 76 has an opening 76p that opens to the left and right. The upper surface portion 76 has a frame shape extending along the front and rear edges of the opening 76p. Angle steel 56 is fastened to the upper surface portion 76 by fastening members (not shown) such as bolts.

[0082] The rear surface portion 77 is disposed on the rear side of the lower frame 71, which has a cuboid shape. The rear surface portion 77 has an opening 77p that opens downwards. The rear surface portion 77 has a frame shape extending along the right edge, top edge, and left edge of the opening 77p. The lower surface portion 78 is disposed on the lower side of the lower frame 71, which also has a cuboid shape. The lower surface portion 78 has an opening 78p that opens forwards and backwards. The lower surface portion 78 has a frame shape extending along the right edge and left edge of the opening 78p.

[0083] like Figure 1 and Figure 2 As shown, the transformer device 100 also has a cover 21.

[0084] The enclosure 21 forms an internal space 110 for housing the transformer 41 (41U, 41V, 41W). The internal space 110 also houses the upper frame 32, the third connecting member 61, and the lower frame 71.

[0085] The cover 21 has an overall rectangular shape. The length of the cover 21 in the vertical direction is greater than its length in the front-back direction and also greater than its length in the left-right direction. The cover 21 is supported by an upper frame 32 and a lower frame 71. The upper frame 32 and the lower frame 71 function as frame members supporting the cover 21 above and below the transformer 41 (41U, 41V, 41W).

[0086] More specifically, the cover 21 has a front cover 22, side covers 23 (23L, 23R), a rear cover 24, and a top cover 25.

[0087] The front cover 22 is positioned on the front side of the cover 21, which has a cuboid shape. The front cover 22 is fastened to the front surface 73 of the lower frame 71 by fastening members such as bolts (not shown).

[0088] Side covers 23 (23L, 23R) are arranged as a pair, left and right. Side cover 23L is located on the left side of the cover 21, which has a cuboid shape, and side cover 23R is located on the right side of the cover 21, which also has a cuboid shape. Side covers 23L and side covers 23R have a symmetrical shape.

[0089] The side cover 23 is provided with a first opening 27 and a second opening 26. The first opening 27 is configured to communicate between the internal space 110 and the space outside the internal space 110. The first opening 27 is composed of a plurality of slits penetrating the side cover 23. The first opening 27 is located below the W-phase transformer 41W. The entire first opening 27 is located below the bottom surface 42b of the core 42 of the W-phase transformer 41. Alternatively, a portion of the first opening 27 may be located below the bottom surface 42b of the core 42 of the W-phase transformer 41. The first opening 27 is opposite to the openings 74p and 75p provided in the lower frame 71 in the horizontal direction (left-right direction).

[0090] The second opening 26 is configured to connect the internal space 110 with the space outside the internal space 110. The second opening 26 is formed by a plurality of slits penetrating the side cover 23. The second opening 26 is located above the U-phase transformer 41. A portion of the second opening 26 is located above the coil 46 of the U-phase transformer 41. Alternatively, the entire second opening 26 may be located above the coil 46 of the U-phase transformer 41. The second opening 26 is opposite the upper frame 32 in the horizontal direction (left-right direction).

[0091] The side cover 23 (23L, 23R) is fastened by bolts or other fastening members (not shown) to the right side face 75 or left side face 74 of the lower frame 71, which is connected to the upper frame 32.

[0092] The rear cover 24 is disposed on the rear surface side of the cover 21, which has a cuboid shape. The rear cover 24 is fastened to the rear surface 77 of the third connecting member 61, which is connected to the upper frame 32, and the lower frame 71 by fastening members such as bolts (not shown).

[0093] A top cover 25 is disposed on the upper surface of a cover 21, which has a cuboid shape. The top cover 25 is configured to cover the upper frame 32 from above. The top cover 25 is fastened to the upper frame 32 by bolts or other fastening components (not shown). Figure 1As shown, a through hole 25p is provided in the top cover 25, which is used to allow lifting tools 200 such as eye bolts to be inserted into the nuts 31 provided in the upper frame 32.

[0094] The enclosure 21 forms an enclosure surrounding the transformer 41 (41U, 41V, 41W), while the upper frame 32 does not form such an enclosure. The upper frame 32 is housed inside the enclosure 21 (internal space 110). Alternatively, the upper frame 32 may be configured to extend from a position inside the enclosure 21 connected to the core 42 of the U-phase transformer 41U, through the enclosure 21, towards the outside of the enclosure 21.

[0095] When transporting the transformer assembly 100, the threaded portion of the lifting device 200, such as the eye bolt, is screwed into the nut 31 located on the upper frame 32, thereby installing the lifting device 200 onto the upper frame 32. The lifting device 200 can be always installed on the upper frame 32, or it can be prepared when transporting the transformer assembly 100. A strap or hook is attached to the lifting device 200, such as the eye bolt, and the transformer assembly 100 is lifted using a crane or similar device.

[0096] In this embodiment, in a transformer device 100 with a longitudinally stacked structure in which the cores 42 of the vertically stacked V-phase transformer 41V and W-phase transformer 41W are connected to each other by a first connecting member 53 and the cores 42 of the vertically stacked U-phase transformer 41U and V-phase transformer 41V are connected to each other by a second connecting member 50, the upper frame 32 for mounting the lifting device 200 is connected to the core 42 of the uppermost U-phase transformer 41U among the U-phase transformer 41U, V-phase transformer 41V and W-phase transformer 41W.

[0097] With this structure, when the transformer assembly 100 is lifted, the heavy weight of the transformers 41 (41U, 41V, 41W) can be prevented from acting on the upper frame 32, which is positioned above the coil 46 of the U-phase transformer 41U, without passing through the cover 21. Therefore, the cover 21 does not require high rigidity, thus reducing the manufacturing cost of the transformer assembly 100.

[0098] Furthermore, the housing 21 is supported by an upper frame 32 and a lower frame 71 disposed above and below the transformers 41 (41U, 41V, 41W). With this structure, it is unnecessary to provide frame members around the stacked transformers 41 (41U, 41V, 41W) to support the housing 21. This simplifies the construction of the transformer assembly 100, thereby further reducing its manufacturing cost.

[0099] Additionally, the cover 21 (side cover 23) is provided with a first opening 27 and a second opening 26 as ventilation openings. For example... Figure 2As indicated by the arrows, as the transformer 41 (41U, 41V, 41W) heats up, an airflow is formed that enters the interior space 110 through the first opening 27 and exits to the outside of the interior space 110 through the second opening 26.

[0100] As described above, due to this structure, since the transformer 41 (41U, 41V, 41W) is frameless, the air used for cooling can flow more smoothly within the internal space 110. This improves the cooling efficiency of the transformer 41 (41U, 41V, 41W).

[0101] Reference Figure 8 The third connecting member 61 is configured to be able to be positioned in accordance with the relative positional relationship between the upper frame 32 and the cover 21 (side cover 23, rear cover 24). The third connecting member 61 is configured to be able to be positioned in accordance with the relative positional relationship between the upper frame 32 and the cover 21 (side cover 23, rear cover 24) in the front-rear direction.

[0102] More specifically, the third connecting member 61 has a first connecting portion 62 and a second connecting portion 63 (63j, 63k). The first connecting portion 62 has a flat plate shape orthogonal to the left-right direction. The first connecting portion 62 is provided with an elongated hole 66 in the longitudinal direction. The first connecting portion 62 is provided with a plurality of elongated holes 66 that are separated from each other in the longitudinal direction. The first connecting portion 62 is fastened to the upper frame 32 (longitudinal plate portion 33) by fastening members (not shown) such as bolts inserted into the elongated holes 66.

[0103] The second connecting part 63 is connected to the cover 21. The second connecting part 63j has a flat plate shape orthogonal to the front-back direction. The second connecting part 63j is located at a position where it bends to the left and right from the rear end of the first connecting part 62. The second connecting part 63j is connected to the rear cover 24 by fastening members such as bolts (not shown). The second connecting part 63k has a flat plate shape orthogonal to the vertical direction. The second connecting part 63k is located at a position where it bends to the left and right from the upper end of the first connecting part 62. The second connecting part 63k is connected to the side cover 23 by fastening members such as bolts (not shown).

[0104] In this embodiment, the U-phase transformer 41U, V-phase transformer 41V, and W-phase transformer 41W are stacked vertically. An upper frame 32 is connected to the core 42 of the uppermost U-phase transformer 41U, and a lower frame 71 is connected to the core 42 of the lowermost W-phase transformer 41W. In this structure, the housing 21 is supported by the upper frame 32 and the lower frame 71, which are separate vertically. Therefore, there is a possibility that the housing 21 may shift positionally between itself and either the upper frame 32 or the lower frame 71.

[0105] To address this, by adjusting the position of the third connecting member 61 in the longitudinal direction along the length of the elongated hole 66, the relative positional offset between the upper frame 32 and the cover 21 (side cover 23, rear cover 24) can be absorbed. This allows for easy installation of the cover 21.

[0106] In addition, a component for adjusting the position corresponding to the third connecting member 61 may also be provided at the connection position between the lower frame 71 and the cover 21.

[0107] Reference Figure 9 The transformer assembly 100 also includes electrical equipment 86. Electrical equipment 86 is positioned below the W-phase transformer 41W. Electrical equipment 86 is supported by a lower frame 71.

[0108] Electrical equipment 86 is an electrical component associated with transformer assembly 100. Electrical equipment 86 may also include terminal blocks that form current circuits for the input and output sides of transformer 41 or circuit breakers that disconnect current circuits in the event of an overcurrent.

[0109] Electrical device 86 is disposed in a space surrounded by a front surface portion 73, a left side surface portion 74, a right side surface portion 75, an upper surface portion 76, a rear surface portion 77, and a lower surface portion 78. Electrical device 86 is positioned horizontally (left-right direction) opposite to openings 74p and 75p of the lower frame 71. Electrical device 86 is positioned horizontally (front-back direction) opposite to opening 77p of the lower frame 71.

[0110] Electrical equipment 86 is mounted on the lower frame 71 by means of mounting member 80. Mounting member 80 has a frame portion 81 and a plate portion 82. The frame portion 81 has a frame shape extending in the horizontal direction (left-right direction). The frame portion 81 extends between the left and right lower surface portions 78 of the lower frame 71. The plate portion 82 is composed of a plate extending from the frame portion 81. The plate portion 82 extends from the frame portion 81 in the front-rear direction, close to the front surface portion 73, and diagonally upward. Electrical equipment 86 is placed on the plate portion 82.

[0111] In addition, the rear cover 24 of the cover 21 is provided with a through hole (not shown) for wiring extending from the electrical equipment 86.

[0112] With this structure, the electrical equipment 86 can be arranged in the space below the bottommost W-phase transformer 41W, which is one of the U-phase transformer 41U, V-phase transformer 41V, and W-phase transformer 41W. In addition, air from outside the enclosure 21 enters into the interior of the lower frame 71 through the first opening 27 provided in the side enclosure 23 (23L, 23R) and the openings 74p, 75p provided in the lower frame 71, thus enabling efficient cooling of the electrical equipment 86.

[0113] To summarize the above description of the structure of the transformer device 100 according to Embodiment 1 of the present invention, the transformer device 100 of this embodiment includes: a transformer 41, which includes a core 42 and a coil 46 wound on the core 42; and an upper frame 32 as a lifting device mounting part, which is disposed above the coil 46 and connected to the core 42, and is capable of mounting a lifting device 200 for suspending the transformer device 100.

[0114] According to the transformer device 100 of Embodiment 1 of the present invention configured in this way, the manufacturing cost of the transformer device 100 can be reduced in a structure that takes into account the lifting operation of the transformer device 100.

[0115] Furthermore, in this embodiment, the lifting device mounting part of the present invention is described as being able to mount the upper frame 32 of the lifting device 200, such as a lifting eye bolt, but the present invention is not limited thereto. For example, as a lifting device, a hook ring consisting of a U-shaped metal part and a threaded portion mounted on the opening of the U-shaped metal part can be used. In this case, as the lifting device mounting part of the present invention, a frame body having holes for the threaded portion of the hook ring to pass through can also be used.

[0116] (Implementation Method 2)

[0117] Figure 10 This is a cross-sectional view showing the transformer device according to Embodiment 2 of the present invention. Figure 11 It means along Figure 10 The image shows a cross-sectional view of the transformer assembly as seen from the direction of the arrow on the XI-XI line. In this embodiment, structures that are identical to those in the transformer assembly 100 of Embodiment 1 will not be described again.

[0118] Reference Figure 10 and Figure 11 In this embodiment, the U-phase transformer 41U, the V-phase transformer 41V, and the W-phase transformer 41W are arranged horizontally. The horizontal arrangement order of the U-phase transformer 41U, the V-phase transformer 41V, and the W-phase transformer 41W is not particularly limited.

[0119] The transformer assembly has an upper frame 232 (suspension mounting section). The upper frame 232 is connected to the core 42 of the U-phase transformer 41U, the core 42 of the V-phase transformer 41V, and the core 42 of the W-phase transformer 41W.

[0120] The upper frame 232 extends horizontally along the length direction of the U-phase transformer 41U, V-phase transformer 41V, and W-phase transformer 41W. The upper frame 232 is positioned above the cores 42 of the U-phase transformer 41U, V-phase transformer 41V, and W-phase transformer 41W. The upper frame 232 is fastened to the first transverse rib 43 of the core 42 of the U-phase transformer 41U, the first transverse rib 43 of the core 42 of the V-phase transformer 41V, and the first transverse rib 43 of the core 42 of the W-phase transformer 41W by bolts or other fastening components.

[0121] The upper frame 232 is constructed of L-shaped angle steel. (For example...) Figure 11 As shown, the upper frame 232 is arranged as a pair on the left and right, separated by the core 42 of the transformer 41 (41U, 41V, 41W). The upper frame 232 is configured to install a lifting device for suspending the transformer assembly. The upper frame 232 has a nut 231. The nut 231 can fasten the lifting device for suspending the transformer assembly.

[0122] The transformer assembly also has a housing 221. The housing 221 houses the transformer 41 (41U, 41V, 41W). The upper frame 232 is housed inside the housing 221.

[0123] With this structure, when hoisting the transformer assembly, the heavy weight of the transformers 41 (41U, 41V, 41W) can be applied to the upper frame 232, which is positioned above the cores 42 of the U-phase transformer 41U, V-phase transformer 41V, and W-phase transformer 41W, without passing through the cover 221. Therefore, the cover 221 does not require high rigidity, thus reducing the manufacturing cost of the transformer assembly.

[0124] The transformer device of Embodiment 2 of the present invention, configured in this way, can achieve the same effects as described in Embodiment 1.

[0125] Furthermore, the upper frame 232 can also be a structure that is cut off between the U-phase transformer 41U and the V-phase transformer 41V, and between the V-phase transformer 41V and the W-phase transformer 41W. In this case, at least one of the upper frames 232 connected to the U-phase transformer 41U, the upper frame 232 connected to the V-phase transformer 41V, and the upper frame 232 connected to the W-phase transformer 41W may be provided with a nut 231 that can be screwed into the lifting device.

[0126] As an example, the upper frame 232 connected to the U-phase transformer 41U and the upper frame 232 connected to the W-phase transformer 41W are respectively provided with nuts 231 that can be screwed into the lifting device. In this structure, the upper frame 232 connected to the U-phase transformer 41U and the upper frame 232 connected to the W-phase transformer 41W correspond to the lifting device mounting part of the present invention.

[0127] The embodiments disclosed herein should be considered illustrative in all respects and not limiting. The scope of the invention is defined not by the foregoing description but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0128] Industrial availability

[0129] This invention is applied to transformer devices used in machine tools and the like.

[0130] Explanation of reference numerals in the attached figures

[0131] 21, 221, Cover; 22, Front Cover; 23, 23L, 23R, Side Covers; 24, Rear Cover; 25, Top Cover; 25p, Through Hole; 26, Second Opening; 27, First Opening; 31, 231, Nut; 32, 232, Upper Frame; 33, Longitudinal Plate; 33u, Lower End; 34, Upper Plate; 41, Transformer; 41U, U-phase Transformer; 41V, V-phase Transformer; 41W, W-phase Transformer; 42, Core; 42a, Top Surface; 42b, Bottom Surface; 43, First Horizontal Rib; 43c, First Side; 43d, Second Side; 44, Second Horizontal Rib; 44c, Third Side; 44d, Fourth Side; 46, Coil; 46s, Upper End; 47, Hollow Section; 48, First Longitudinal Rib; 49, Second Longitudinal rib; 50, second connecting member; 51, third angle steel; 52, fourth angle steel; 53, first connecting member; 54, first angle steel; 55, second angle steel; 56, angle steel; 61, third connecting member; 62, first connecting part; 63, 63j, 63k, second connecting part; 66, elongated hole; 71, lower frame; 73, front surface; 74, left side face; 74p, 75p, 76p, 77p, 78p, opening; 75, right side face; 76, upper surface; 77, rear surface; 78, lower surface; 80, mounting member; 81, frame part; 82, flat plate part; 86, electrical equipment; 91, first insertion hole; 92, second insertion hole; 100, transformer device; 110, internal space; 200, lifting device.

Claims

1. A transformer device, wherein, The transformer assembly includes: A transformer, comprising a core and a coil wound around the core; The lifting device mounting part is positioned above the coil and connected to the core; and The enclosure forms an internal space to house the transformer and is connected to the lifting device mounting section. A lifting device for suspending a transformer assembly containing the transformer and the housing can be installed at the lifting device mounting section. The transformer includes a first-phase transformer, a second-phase transformer stacked above the first-phase transformer, and a third-phase transformer stacked above the second-phase transformer. The lifting device mounting part is connected to the core of the third phase transformer, and, The transformer assembly includes: The first connecting member connects the core of the first phase transformer and the core of the second phase transformer; A second connecting member connects the core of the second-phase transformer and the core of the third-phase transformer; and The lower frame is positioned below and connected to the first-phase transformer. The cover is supported by the lifting device mounting part and the lower frame. The cover is provided with: The first opening is located below the first phase transformer and connects the internal space with the space outside the internal space; and The second opening is located above the third-phase transformer and connects the internal space with the space outside the internal space. An airflow is formed that enters the interior space through the first opening and exits to the outside of the interior space through the second opening.

2. The transformer device according to claim 1, wherein, The transformer assembly also includes electrical equipment disposed below the first-phase transformer and supported by the lower frame.

3. The transformer device according to claim 1 or 2, wherein, The transformer assembly also includes a third connecting member that connects the lifting device mounting part and the cover and is capable of adjusting its position according to the relative positional relationship between the lifting device mounting part and the cover; or, the third connecting member connects the lower frame and the cover and is capable of adjusting its position according to the relative positional relationship between the lower frame and the cover.

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