JP2012074493A - Stationary induction electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of an external member even if a core is moved by applying external force such as vibration/impact, in a configuration of a stationary induction electric apparatus.SOLUTION: The stationary induction electric apparatus comprises a core assembly 11 forming a frame shape; a winding 12 installed at a center portion of the core assembly 11; a pair of upper and lower clamp members 13 and 14 which are oppositely disposed so as to clip upper and lower lateral core portions 11a and 11b of the core assembly 11 in a laminating direction of electric iron plates; upper and lower cross bars 15 and 16 installed over both clamp members so as to unite both clamp members; bumpers 21-24 provided at four corner portions of the core assembly 11; and a fastening band 19 provided so as to bundle the lateral core portions 11a and 11b and the pair of clamp members. A shape of a configuring member such as the cross bars 15 and 16 and the bumpers 21-24 is made to be a shape having a larger section modulus than a platy member.

Description

  The present invention relates to a structure for reducing the weight of an iron core assembly of a static induction electric device such as a transformer or a reactor, and more particularly to an improvement of an iron core assembly that holds a winding.

  In the structure of static induction devices such as medium and large capacity transformers and reactors, the structure of static induction devices is lighter than the current structure due to restrictions on transportation of static induction devices and the rise in market material costs due to the recent depletion of resources. Has come to be required.

  In general, in a static induction electric device configuration such as a medium / large capacity transformer, a reactor, etc., a flat crossbar on the laminated iron core and the winding tightening configuration is the opposite of the pinching of the winding generated in the winding tightening plate. In order to suppress the rotational force due to the force, it is necessary to increase the rigidity, and a pair of yoke clamps (hereinafter referred to as clamps) arranged on both side surfaces of the yoke in the stacking direction are connected using a thick flat plate. It has a configuration.

  In addition, the horizontal impact load that occurs when transporting the static induction appliance is applied to a bumper that is placed orthogonally to the clamps and stretched across a pair of clamps. The shape is used. When the bumper is fixed to the clamp side, a large bending load and shear load are applied to the bumper itself, so that it is necessary to increase the rigidity of the bumper and the bumper fastening bolt. For this reason, while using a thick flat plate as the shape of the bumper, measures such as increasing the size of the bumper fastening bolt or increasing the number of bolts are taken.

  As a conventional static induction machine of this type, there is one as shown in Patent Document 1, for example.

  That is, the static induction appliance shown in Patent Document 1 will be described with reference to FIGS. 10 and 11.

  FIG. 10 is a side view of a part of the static induction appliance that is cut vertically. FIG. 11 is a plan view showing the crossbar shown in FIG.

  10 includes a leg iron core 2, a winding 3 provided so as to cover the outside thereof, yoke iron cores 4a and 4b provided at upper and lower ends in the longitudinal direction of the winding 3, and a winding 3 And a magnetic shield (5A to 5L) group 5 disposed between the yoke iron cores 4a and 4b, a clamp 6 provided to face both sides of the yoke iron cores 4a and 4b, and a clamp provided to face each other. 6 includes a flat bumper 7 (see FIG. 11) that is connected and fixed, and an upper cross bar 8a provided at the upper end of each of the yoke cores 4a and 4b and a lower cross bar 8b provided at the lower end. .

  As shown in FIG. 11, the bumper 7 has a flat plate shape that is provided on both sides in the longitudinal direction between the clamps 6 that are opposed to each other with the leg iron core 2 interposed therebetween, and that is connected across the clamps 6.

  The upper cross bar 8a and the lower cross bar 8b connect and fix the clamps 6 across the yoke iron cores 4a and 4b.

  That is, a plurality of upper cross bars 8a are connected and fixed so as to be connected in a direction perpendicular to the stacking direction of the yoke cores 4a (lateral direction in FIG. 11) in the upper part between the clamps 6 provided to face each other. As shown in FIG. 10, a plurality of lower crossbars 8b are provided between the clamps 6 provided facing each other, and a plurality of lower crossbars 8b are provided between the clamps 6 along the stacking direction of the yoke cores 4b. A plurality of connections are fixed so as to be coupled across the clamps 6.

  According to the conventional static induction electric machine 1, both ends of the bumper 7 are rotationally supported, and a larger bending load and shear load are applied to the bumper and the bumper fastening bolt as compared with the fixed support. Therefore, it is necessary to increase the rigidity of the bumper and the bumper fastening bolt. The bumper uses a thick flat plate. It is structured to connect the clamps arranged in.

Japanese Patent Laid-Open No. 5-299268

  Further, the upper cross bar 8a and the lower cross bar 8b were also flat. The upper crossbar 8a and the lower crossbar 8b need to have high rigidity in order to suppress the rotational force due to the reaction force of pinching the windings, and are arranged on both side surfaces of the yoke in the stacking direction using thick flat plates. The clamps are connected to each other.

  In addition, with a clamp and a flat bumper structure arranged in a direction perpendicular to the horizontal impact load generated during transportation, both ends of the bumper are rotationally supported, and a large bending load compared to the fixed support by the bumper and bumper fastening bolts And it has a structure to which a shear load is applied. Therefore, it is necessary to increase the rigidity of the bumper and its bumper fastening bolt, which is one of the reinforcing components, for example, the bumper uses a thick flat plate, and the bumper fastening bolt uses a larger size bolt or the number of bolts. By increasing the number, the clamps disposed on both side surfaces of the yoke in the stacking direction were connected to the cause of the increase in the mass of the transformer due to the crossbar and the clamp member which are not only the bumper but also the reinforcing component.

  On the other hand, in static induction appliances such as medium- and large-capacity class transformers, a light and strong static induction appliance is required with a lower material cost than the present in view of transportation restrictions and an increase in market material costs due to the recent depletion of resources. It has become.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a stationary induction device that is light in weight while maintaining the same strength as the conventional one and is economically advantageous.

  In order to achieve the above object, according to the present invention, an iron core assembly having a rectangular frame shape formed by laminating a plurality of electric iron plates, a winding installed at the center of the iron core assembly, A pair of upper clamp members provided so as to sandwich the upper and lower lateral iron core portions of the iron core assembly in the stacking direction of the electric iron plates, and the plane portions facing each other along the surface direction of the electric iron plates; A lower clamp member, an upper crossbar and a lower crossbar that are attached so as to be coupled across the pair of upper clamp member and lower clamp member, and four corners of the iron core assembly; A required interval is provided so as to bundle the bumper having the plane portion opposed to each other along the stacking direction, the upper and lower lateral iron core portions, and the pair of upper and lower clamp members. A plurality of fastening bands, and at least one of the upper crossbar, the lower crossbar, the upper clamp member, the lower clamp member, and the bumper is a member having a larger section modulus than a flat plate. A static induction electric device is provided.

  According to the present invention, even if parts such as the iron core are moved due to vibrations in the front / rear / left / right directions during product transportation of the stationary induction machine itself, the parts such as the crossbar and bumper are not sufficiently deformed. It can be configured to withstand.

  Moreover, even if the static induction device itself is a medium / large capacity class, it is possible to provide a static induction device that can enhance the strength of parts such as a crossbar and a bumper and can further reduce the weight.

The front view in the embodiment of the static induction machine of the present invention. The side view which cuts and shows a part in embodiment of the static induction appliance of this invention. The enlarged view of the III section of FIG. The enlarged view of the IV section of FIG. It is a figure which shows the Example of the crossbar and bumper shown to FIG. 1 and FIG. 2, (a) is a front view, (b) is the side view. The figure which shows the positional relationship of the coupling | bonding structure of a bumper with respect to the clamp seen from upper direction, and the longitudinal direction iron core part in VI part of FIG. It is a figure which shows the other Example of the cross bar and bumper shown in FIG. 5, (a) is a front view, (b) is the side view. It is a figure which shows the other Example of the cross bar and bumper shown in FIG. 7, (a) is a front view, (b) is the side view. It is a figure which shows the other Example of the crossbar and bumper shown in FIG. 8, (a) is a front view, (b) is the side view. The side view which cuts and shows a part of conventional static induction machine. The top view which removes and shows the crossbar shown in FIG.

  Hereinafter, a static induction device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

  FIG. 1 is a front view of an embodiment of a static induction electric machine according to the present invention. FIG. 2 is a side view in which a part of the embodiment of the static induction electric appliance of the present invention is cut away. FIG. 3 is an enlarged view of a portion III in FIG. FIG. 4 is an enlarged view of a portion IV in FIG. FIGS. 5A and 5B are diagrams showing an embodiment of the crossbar and the bumper shown in FIGS. 1 and 2, wherein FIG. 5A is a front view and FIG. 5B is a side view thereof. FIG. 6 is a view showing the bumper coupling structure with respect to the clamp and the positional relationship of the longitudinal iron core portion as viewed from above in the VI portion of FIG. 1.

  1 shows the front side, but since the opposite side has the same configuration, only the front side will be described.

  The stationary induction device 10 is provided in a frame-shaped iron core assembly 11 formed by laminating a plurality of electric iron plates, a winding 12 installed at the center of the iron core assembly 11, and the iron core assembly 11. The upper clamp member 13 and the lower clamp member 14, as shown in FIG. 2, the upper cross bar 15 that is attached so as to be coupled across the pair of upper clamp members 13, and the pair of lower clamp members 14. A lower cross bar 16 that is attached so as to be coupled to each other, bumpers 21 to 24 provided at upper and lower four corners of the core assembly 11, a flat plate 18 provided for reinforcing the core assembly 11, and an iron core assembly It comprises a plurality of fastening bands 19 that integrally couple various members attached around the solid body 11.

  As shown in FIG. 1, the iron core assembly 11 includes upper and lower lateral iron core portions 11a and 11b and left and right vertical iron core portions 11c and 11d.

  The transverse iron core portions 11a and 11b are formed by laminating a large number of thin electric iron plates, and are formed by laminating in the transverse direction as shown in FIG. Further, the longitudinal core portions 11c and 11d are also formed by laminating in the lateral direction in the same manner as the transverse core portions 11a and 11b.

  The transverse iron core portions 11a and 11b include an upper clamp member 13 and a lower clamp member 14 that firmly support the winding 12 from above and below.

  The upper clamp member 13 and the lower clamp member 14 are installed along the longitudinal direction of the lateral iron core portions 11a and 11b, respectively, and serve to suppress the reaction force of clamping the winding 12 and the impact load in the vertical direction. is there.

  As shown in FIGS. 3 and 4, the winding 12 is sandwiched and fixed by the upper clamp member 13 and the lower clamp member 14 via the spacers 25 in the upper and lower portions of the lateral iron core portions 11 a and 11 b. The upper clamp member 13 and the lower clamp member 14 are provided at the upper and lower portions of the winding 12, and clamp and fix the winding 12 from above and below by fixing means (not shown).

  Further, the upper clamp member 13 and the lower clamp member 14 arranged on both side surfaces in the stacking direction of the transverse iron core portions 11a and 11b are provided in the longitudinal direction of the clamp members 13 and 14 in order to suppress a horizontal impact load generated during transportation. Both sides in the direction are connected by bumpers 21-24.

  As shown in FIG. 3, the upper clamp member 13 is an L-shaped member arranged in parallel along the longitudinal direction of the lateral iron core portion 11a, and includes flat portions 13a and 13b.

  The flat surface portion 13a is installed along the longitudinal direction of the transverse iron core portion 11a, and is connected and fixed by a contact plate 18 on the longitudinal iron core portions 11c and 11d side, bolts, and nuts 17a as shown in FIG. .

  Thus, as shown in FIGS. 3 and 6, the upper clamp member 13 is provided with the upright portions 13c and 13d at the horizontally opposed positions, so that the section coefficient is made larger than that of the flat plate. Yes. As a result, it is possible to fix the coil 12 more firmly so as to suppress the reaction force and the impact load in the vertical direction of the winding 12 in the state where the transverse iron core portion 11a is sandwiched.

  Further, as shown in FIG. 3, the upper clamp member 13 is provided with an upright portion 13c that rises vertically facing the flat portion 13a, as shown in FIG. And the upper cross bar 15 is attached so that it may be fixed by the volt | bolt and the nut 17b across this standing upright part, and the horizontal direction core part 11a may be suppressed.

  Further, the upper clamp member 13 has a direction orthogonal to the parallel-arranged plane portion 13a, as shown in FIG. 3, that is, as viewed from above the stationary induction device 10, as shown in FIG. Standing portions 13d that rise vertically from the flat portion 13a are arranged to face each other with the longitudinal core portion 11a interposed therebetween, and the bumpers 21 to 24 are joined and fixed by bolts and nuts 17b.

  As shown in FIG. 4, the shape of the lower clamp member 14 is an L-shape that is arranged in parallel along the longitudinal direction of the transverse iron core portion 11b, and has flat portions 14a and 14b. The flat surface portion 14a is joined and installed along the longitudinal direction of the lateral iron core portion 11b and is connected to the contact plate 18 on the lateral iron core portions 11a and 11b side. Further, the transverse iron core portion 11b is sandwiched and fixed by the flat surface portion 14a of the lower clamp member 14 disposed to face the transverse iron core portion 11b.

  The flat portion 14b of the lower clamp member 14 is joined and fixed to the lower cross bar 16 side connecting the pair of lower clamp members 14 by bolts and nuts 17c, as will be described later.

  Specifically, as shown in FIG. 3, the upper crossbar 15 is fastened and fixed by bolts and nuts 17 b that are fixing tools across the upright portions 13 c that are formed to face each other at the upper part of the pair of upper clamp members 13. The In this state, the axial direction of the bolt is aligned with the direction of the tightening reaction force (P1 arrow) of the winding 12 that mainly acts on the lateral iron core portion 11a.

  Specifically, the shape of the upper cross bar 15 is an elongated plate as shown in FIG. 5 (a), and as shown in FIG. 5 (b), the shape of the upper cross bar 15 is an upright part from the planar base 15a. This is a member provided with two ribs 15b.

  Specifically, as shown in FIG. 4, the lower crossbar 16 is fastened and fixed by bolts and nuts 17 c with the base portion 16 a overlapped with the flat portions 14 b of the pair of lower clamp members 14. In this state, the direction of the bolt shaft is aligned with the direction of the load (P2 arrow) of the tightening reaction force of the winding 12 that mainly acts on the lateral iron core portion 11b.

  As shown in FIG. 1, the bumpers 21 to 24 are provided at upper and lower four corners of the iron core assembly 11 and are reinforced so as not to be deformed or damaged by an external force or an impact force applied to the four corners.

  Further, the bumpers 21 to 24 have the same shape as the upper (lower) crossbar 15 (16). For example, in the case of the bumper 22, as shown in FIGS. 5b and 6, the bumpers 21 to 24 stand from the planar base 22a. This is a member provided with two upright portions 22b.

  The bumpers 21, 23, and 24 have the same shape as that of the bumper 22, and are members provided with base portions 21a, 23a, and 24a and two upright portions 21b, 23b, and 24b.

  The bumpers 21 to 24 may be made of a steel material integrally, for example, by extrusion molding.

  In addition, as shown in FIG. 6, the bumper 22 is fastened and fixed by bolts and nuts 17 b across a pair of upright portions 13 d formed at respective ends of the pair of upper clamp members 13. In this state, the direction of the bolt shaft is mainly matched to the direction of the load (P3 arrow) applied by vibration and swinging during movement of the stationary induction device 10 such as transportation.

  Although not shown, the bumper 21 is attached in the same configuration as the bumper 22.

  Further, the pair of lower clamp members 14 are fastened and fixed by bolts and nuts across ribs (not shown) formed at the ends. Further, in this state, the direction of the bolt shaft is mainly matched to the direction of the horizontal load applied by vibration / swing during movement of the stationary induction device 10 such as transportation.

  Specifically, in the state shown in FIG. 1, the fastening band 19 is configured so that the laminated iron cores of the lateral iron core portions 11 a and 11 b and the vertical iron core portions 11 c and 11 d do not fall apart, and the clamp members 13 and 14 are A plurality are arranged so as to be bundled in a combined state.

  On the other hand, on the side of the longitudinal iron core portions 11c and 11d, specifically, as shown in FIG. 1, the laminated iron cores of the vertical iron core portions 11c and 11d are not separated and the contact plate 18 is in a coupled state. A plurality are arranged at intervals so as to be bundled.

  In addition, as shown in FIG.5 (b), the cross bars 15 and 16 and the bumpers 21-24 stand up from the plane parts 15a, 16a, 21a-24a, and these plane parts 15a, 16a, 21a-24a. Not only the shape of the ribs 15b, 16b, 21b to 24b to be performed, but also a shape having a larger section modulus than a flat plate shape can be adopted as shown in FIGS.

  That is, for example, as shown in FIG. 7, a T-shaped angle member 30 can be employed. This T-shaped one is formed by erecting one rib 30b extending in the longitudinal direction from the central portion in the width direction of the elongated flat plate-like base portion 30a.

  When the T-shaped angle member 30 shown in FIG. 7 is used, the surface on the base 30a side may be aligned with the coupling side of the clamp members 13, 14, etc., and fixed with bolts and nuts.

  Moreover, as shown in FIG. 8, the H-type structural material 31 can be employ | adopted. This H-shaped structural member 31 is formed by standing up two ribs 31b from both ends of an elongated flat plate-like base 31a.

  When the H-shaped structural member 31 shown in FIG. 8 is used, the surface on the upright portion 31b side may be aligned with the coupling side of the clamp members 13, 14, for example, and fixed with bolts and nuts. As this H-type structure, a commercially available H-type steel may be used. When the H-type steel is used, it is possible to reduce the number of processing steps for attaching the rib to the base.

  Furthermore, as shown in FIG. 9, various cylindrical materials 32, such as a rectangular hollow shape, can be employed.

  When using the rectangular hollow cylindrical body 32 shown in FIG. 9, a notch 32b having a required dimension is provided on the base and the side facing the base, and the base-side surface, for example, the clamp member 13 is provided. , 14 and the like, and bolts and nuts may be fastened and fixed through the notches 32b.

  In particular, as a rectangular hollow shape, by using a square pipe, when the base is a flat plate, it is a lighter and more rigid member than a structure with ribs in the direction perpendicular to the flat plate surface. In addition, the number of processing steps for attaching the rib to the base can be reduced.

  Furthermore, in adopting the above various shapes for the crossbars 15 and 16 and the bumpers 21 to 24, it is not necessary to adopt them for all of these members, depending on the size of the stationary induction device 10. It is possible to implement variously by selectively adopting them and appropriately considering the sizes of the cross bars 15 and 16 and the bumpers 21 to 24 themselves.

  Next, the operation of the stationary induction device 10 will be described.

  It is general that the iron core assembly 11 of the stationary induction device 10 has a considerable weight at the time of transportation when the stationary induction device 10 is installed. When such heavy objects are subjected to shock such as shaking or vibration, especially when each member of the crossbars 15 and 16 and the bumpers 21 to 24 receives a load from the iron core assembly 11, A bending load and a shearing load are applied to the bolt and the nut 17a. However, the crossbars 15 and 16 are provided with ribs 15b and 16b, and the bumpers 21 to 24 are also provided with ribs. Since 21b to 24b are formed, it is possible to obtain a member particularly resistant to bending load by increasing the section modulus of each member. Further, the section modulus can be selected as desired by variously selecting the thickness and shape of the upright portion.

  That is, for example, as shown in FIG. 6, it is possible to cope with a horizontal (P3 arrow) impact load caused by movement of the stationary induction device 10 acting mainly on the base portion 22a side of the bumper 22 during transportation. it can.

  Further, in the above-described embodiment, as shown in FIG. 6, the tightening direction of the bolt and nut 17b used for joining the bumper 22 and the upper clamp member 13 is the horizontal impact load P3 due to transportation, vibration and swinging. Since the conventional structure has a structure in which only a tensile load is applied compared to a structure in which a shear load is applied to the bumper fastening bolt, the strength required for the bolt and nut 17b can be reduced. It is possible to reduce the number and size of the bolts and nuts 17b.

Further, in particular, when there is an impact component in the vertical direction due to vibration / oscillation (components in the directions P4 and P5 in FIGS. 3 and 4), the members of the upper and lower crossbars 15 and 16 are particularly affected by the When a load is received, a bending load and a shearing load are applied to each member, and similarly, a load is applied to the bolt / nut 17c. The upper and lower crossbars 15 and 16 have a large section modulus of the upper and lower crossbars 15 and 16 due to the ribs 15b and 16b provided on the upper and lower crossbars 15 and 16 when a load is applied.
A member that is particularly resistant to bending load can be obtained.

  Further, since the tightening direction of the bolts and nuts 17b and 17c for fixing the upper and lower crossbars 15 and 16 is adjusted to the direction in which the impact load is applied in the direction of arrows P1, P2, P4 and P5 described above, the tensile load Therefore, the strength required for the bolts and nuts 17a to 17c can be reduced, and the number and size of the bolts and nuts 17a to 17c can be reduced.

  Furthermore, about each rib provided in the upper and lower clamp members 13 and 14, upper and lower crossbars 15 and 16, and bumpers 21 to 24 in the above-described embodiment, the configuration section modulus can be increased from the shape thereof. Therefore, the plate thickness and shape of each member can be selected as desired according to the size of the static induction appliance 10 and the like.

  As described above, by adopting the iron core assembly 11 having the same strength and reduced weight as before, the product of the stationary induction device 10 is shaken or shocked by the influence of transportation, earthquake, or the like when the product is transported or installed. Therefore, it is possible to provide a stationary induction device 10 that can be used safely even in a state where it is received, and that is economically advantageous.

DESCRIPTION OF SYMBOLS 10 Static induction machine 11 Iron core assembly 11a, 11b Horizontal direction iron core part 11c, 11d Vertical direction iron core part 12 Winding 13 Upper clamp member 13a, 13b, 14a, 14b Plane part 13c, 13d, 15b, 16b, 21b-24b, 30b, 31b Standing part (rib)
14 Lower clamp member 15 Upper cross bar 16 Lower cross bar 15a, 16a, 21a to 24a, 30a, 31a Base 17a to 17d Bolt and nut 18 Contact plate 19 Fastening band 21 to 24 Bumper 25 Spacer 30 T-shaped angle member 31 H-shaped structural material 32 Tubular material 32b Notch

Claims (5)

An iron core assembly having a rectangular frame shape formed by laminating a plurality of electric iron plates;
Windings installed in the center of the core assembly;
A pair of upper clamp members provided so as to sandwich the upper and lower lateral iron core portions of the iron core assembly in the stacking direction of the electric iron plates, and the plane portions facing each other along the surface direction of the electric iron plates; A lower clamp member;
An upper crossbar and a lower crossbar that are attached so as to be coupled across the pair of upper clamp member and lower clamp member;
Bumpers that are provided at the four corners of the iron core assembly and in which the plane portions are arranged to face each other along the stacking direction of the iron plates,
A plurality of fastening bands provided at a necessary interval so as to bundle the upper and lower lateral iron cores and the pair of upper and lower clamp members;
At least one of the upper crossbar, the lower crossbar, the upper clamp member, the lower clamp member, and the bumper is a member having a shape with a larger section modulus than that of a flat plate.   The stationary induction device according to claim 1, wherein the pair of clamp members are formed with standing portions that vertically rise from a flat portion of the clamp members.   2. The upper cross bar, the lower cross bar, the upper clamp member, the lower clamp member, and the bumper are characterized in that a side surface or a cross section of at least one member thereof has an H shape or a rectangular hollow shape. Static induction machine.   In the four corners of the iron core assembly, the bumper has an axial direction of a bolt for fixing an upright portion provided on the upper clamp member and a base portion provided on the bumper along the longitudinal direction of the transverse iron core portion of the iron core assembly. The stationary induction device according to any one of claims 1 to 3, wherein the static induction device is attached to the stationary induction device.   The upper crossbar and the lower crossbar are provided so that an axial direction of a bolt is in a vertical direction when the upper crossbar and the lower crossbar are fixed to a pair of clamp members. The static induction machine according to any one of claims 1 to 4.

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