JP6610366B2 - Static induction machine - Google Patents

Description

   The present invention relates to a static induction electric appliance that exhibits a noise reduction effect by housing a static induction electric appliance body in a tank and mounting a sound insulation board on the outer surface of the tank.

As this type of static induction machine, for example, configurations described in Patent Documents 1 and 2 are known.
Patent Document 1 discloses a soundproofing device for an electric device such as a capacitor, a transformer, and a reactor, in which a first vibration isolating member such as rubber is fixed to the upper surface of the electric device, and the upper surface of the first vibration isolating member. A first fixing member such as a stainless steel plate to which bolts and nuts are fixed is fixed, and a part of the L-shaped cross section for soundproof wall steadying is fixed to the foundation with a second fixing member such as an anchor bolt. When fixing the upper part of the soundproof wall of the shape with the first fixing member and fixing the lower part of the soundproof wall to the other end of the cross section L-shaped base for soundproof wall steadying with a third fixing member such as a bolt and nut, A second vibration isolating member such as rubber is inserted between the lower part of the sound insulating wall and the L-shaped cross section for preventing the sound wall stabilizing and between the bolt and the nut.

  In the soundproof transformer described in Patent Document 2, a T-shaped steel material is arranged in the vertical direction on the outer wall of the transformer tank and welded to form a vertical reinforcing member. Place the anti-vibration rubber between the vibration rail seats and attach it by adhesion or integral molding, attach this anti-vibration rail seat to the vertical reinforcing member with the mounting bolt, and insert the insertion part of the sound insulation panel into the sound insulation panel insertion groove The soundproof wall is constructed by stacking, waterproofing caulking between the joints of the soundproof panel and the soundproof panel insertion groove and between the bent portions of the soundproof panel for the purpose of preventing rainwater from entering and preventing sound.

JP 2003-308073 A JP 09-106921 A

  However, in the conventional examples described in Patent Documents 1 and 2, the sound insulation plate is supported by an elastic member for vibration isolation. Generally, a flat structure such as a sound insulation plate is assumed to be a rigid body with one degree of freedom. It is known that it does not become a vibration response of the system. For this reason, even if the natural frequency calculated from the mass constant and the spring constant of the elastic support is set lower than the target excitation frequency assuming that the sound insulating plate is a rigid body, the vibration suppressing effect is smaller than that in the case of the rigid body.

Therefore, in order to obtain a sufficient vibration suppressing effect, it is necessary to make it extremely lower than the rigidity of the sound insulation plate, but there is a problem of attachment strength and stability because it is necessary to support the weight of the sound insulation plate with an elastic member.
In addition, even when supported by an elastic member, there is a problem that the manufacturing cost is increased, such as using a fixture integrated with the elastic member.
Therefore, the present invention has been made paying attention to the problems of the above-described conventional example, and an object thereof is to provide a static induction device that can exhibit a sufficient noise reduction effect with a simple configuration.

  In order to achieve the above object, a static induction electrical appliance according to one aspect of the present invention includes a static induction electrical appliance main body, a tank that houses the static induction electrical appliance main body, a sound insulation plate that is attached to an outer surface of the tank, A support portion that is formed on the side surface of the tank and supports the peripheral portion of the sound insulating plate, and the support portion is a fixed frame portion that faces the peripheral portion of the sound insulating plate fixed to the outer surface of the tank reinforcing member; Formed on the support plate portion facing the peripheral portion of the sound insulation plate from the outside, the first elastic member and the second elastic member that individually contact the peripheral portions of the front and back surfaces of the sound insulation plate, and the fixed frame portion on which the weight of the sound insulation plate is applied The longitudinal elastic modulus of the support member 23 is set to be larger than the longitudinal elastic modulus of the first elastic member and the second elastic member.

  According to one aspect of the present invention, the main vibration direction of the sound insulation plate is supported by the first elastic member and the second elastic member, the weight of the sound insulation plate is received by the support member, and the longitudinal elastic coefficient of the support member is the first elasticity. Since it is set larger than the longitudinal elastic modulus of the member and the second elastic member, a sufficient noise reduction effect can be exhibited with a simple configuration.

It is a perspective view showing a 1st embodiment of a static induction electric machine concerning one mode of the present invention. It is sectional drawing of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2, (a) is an enlarged cross-sectional view showing an upper support part, and (b) is an enlarged cross-sectional view showing a lower support part. It is an enlarged view of the lower end part of FIG. It is an expanded sectional view of the lower support part which shows the modification of the 1st Embodiment of the present invention. It is an expanded sectional view of the lower part support part which shows the 2nd Embodiment of this invention. It is an expanded sectional view of the lower part support part which shows the 3rd Embodiment of this invention. It is an expanded sectional view which shows the modification of the upper support part of this invention.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

Further, the embodiment described below exemplifies an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, The layout is not specified as follows. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.
First, an embodiment of a static induction device that represents one aspect of the present invention will be described.

As shown in FIGS. 1 and 2, the static induction electric machine includes a static induction electric body 11 composed of, for example, a transformer, a reactor, etc., a tank 12 for storing the static induction electric body 11, and an outside of the tank 12. It is comprised with the sound insulation board 13 with which the side surface was mounted | worn.
The static induction electric body 11 has a configuration in which a winding 11b is wound around a magnetic core 11a, and AC power having a frequency of 50 Hz or 60 Hz is supplied from a commercial AC power supply.

The tank 12 is formed in a box shape with a top plate 12a, a bottom plate 12b, front and rear side plates 12c, and left and right side plates 12d, and houses a stationary induction electric body 11 therein, and the cooling effect and insulation strength of the stationary induction electric body 11 are accommodated. In order to increase the temperature, an insulating medium such as insulating oil or gas is filled.
The sound insulating plate 13 is formed of, for example, a damping steel plate, and is attached to the outer surfaces of the front and rear side plates 12c and the left and right side plates 12d of the tank 12. Here, the mounting structure of the sound insulating plate 13 to the tank 12 will be described by taking the front side plate 12c as an example.

As shown in FIG. 1, on the front side plate 12c, three rectangular sound insulation plates 13 are mounted on the outer surface of the front side plate 12c with the short sides as upper and lower ends in the left-right direction.
As shown in FIGS. 2 and 3, each of the three sound insulation plates 13 is a U-shaped sound insulation plate that also serves as a tank reinforcing member that extends in the left-right direction on the upper and lower ends of the tank 12. A rectangular frame composed of support members 14A and 14B, and sound insulation plate support members 14C and 14D having a U-shaped cross section that also serves as a tank reinforcement member that extends vertically between the sound insulation plate support members 14A and 14B. It is attached to the support 14.

  Each of the sound insulating plate support members 14A to 14D is formed from a central plate portion 14a extending in the axial direction and a pair of side plate portions 14b and 14c extending in a direction perpendicular to both side edges along the longitudinal direction of the central plate portion 14a. It is formed in a letter shape. The sound insulating plate supporting members 14A to 14D are fixed to the front side plate 12c of the tank 12 by fixing means such as welding at the open end side of the pair of side plate portions 14b and 14c, that is, the end opposite to the central plate portion 14a. The sound insulating plate 13 is mounted on the outer side surface of the central plate portion 14a opposite to the mounting surface.

That is, the outer periphery of the four sides of the sound insulating plate 13 is supported by the upper support portion 15a, the lower support 15b, the left support portion 15c, and the right support portion 15d, respectively. Here, the support portions 15a, 15c, and 15d have the same configuration, and only the lower support portion 15b has a different configuration from the support portions 15a, 15c, and 15d.
The upper support portion 15a, the left support portion 15c, and the right support portion 15d will be described using the upper support portion 15a as a representative. As shown in the enlarged view of FIG. 3A, the upper support portion 15a is fixed to the upper end side of the sound insulation plate support member 14A, and covers the front surface of the fixed frame portion 17 so as to support the sound insulation plate. A support plate portion 18 extending downward to the lower end of the central plate portion 14a in parallel with the central plate portion 14a of the member 14A, and front and rear side surfaces on the upper edge of the sound insulating plate 13 between the support plate portion 18 and the central plate portion 14a. The 1st elastic member 19 and the 2nd elastic member 20 which contact are provided.

Here, the fixed frame portion 17 has a predetermined thickness and is made of, for example, stainless steel having a length equal to or longer than the short side of the sound insulating plate 13. The support plate portion 18 is also made of, for example, stainless steel.
The fixed frame portion 17 has bolts as a plurality of fixing members at predetermined intervals in the left-right direction with the strip-shaped gaskets 21a and 21b interposed between the front and rear surfaces and the support plate portion 18 disposed on the front side of the gasket 21a. 22 is fixed to the central plate portion 14a.

For the first elastic member 19 and the second elastic member 20, a damping sponge sheet having a longitudinal elastic modulus of, for example, 0.1 to 1.0 MPa is applied so as to absorb vibration in the front-rear direction of the sound insulating plate 13. As this damping sponge sheet, for example, EPDM (ethylene propylene) rubber sponge, CR (chloroprene) rubber sponge, etc., in which raw foam rubber is kneaded with an organic foaming agent, crosslinking agent, softening agent, and reinforcing agent are applied. Is done.
The first elastic member 19 and the second elastic member 20 are adhered to the front and back of the sound insulating plate 13, or the first elastic member 19 is adhered to the back side of the support plate portion 18, and the second elastic member 20 is attached to the central plate portion. You may make it adhere | attach to the front side of 14a.
The left support part 15c and the right support part 15d have the same configuration as the upper support part 15a.

  On the other hand, as shown in FIG. 3B, the basic structure of the lower support portion 15b is the same as that of the upper support portion 15a, the fixed frame portion 17, the support plate portion 18, the first elastic member 19, and the second elastic member. A member 20, gaskets 21a and 21b, and bolts 22 are provided, and these are formed on the upper support 15a and the upper and lower surfaces. In addition to the above configuration, the lower support portion 15b is provided with a support member 23 on the upper surface of the fixed frame portion 17 to contact the lower end surface of the sound insulating plate 13 and receive its weight. The support member 23 has, for example, a silicon rubber (a longitudinal elastic modulus larger than that of the first elastic member 19 and the second elastic member 20 and a smaller longitudinal elastic modulus than the fixed frame portion 17 and the support plate portion 18 of each of the support portions 15a to 15d). The longitudinal elastic modulus is 4.0 to 40 MPa), and is formed in a semicircular cross section with a resin or a metal material. The support member 23 is fixed to the upper surface of the fixed frame portion 17 by fixing means such as adhesion or welding.

Accordingly, the peripheral surface of the sound insulating plate 13 is supported in a state of being sandwiched between the first elastic member 19 and the second elastic member 20 of the upper support portion 15a, the lower support portion 15b, the left support portion 15c, and the right support portion 15d. ing. Further, the lower end surface of the sound insulating plate 13 is received by the cylindrical surface of the support member 23 of the lower support portion 15b.
For this reason, the vibration of the band including the main frequency component of the vibration of the static induction device having the frequency 2fa (100 Hz or 120 Hz) which is twice the frequency fa (50 Hz or 60 Hz) of the commercial AC power source of the static induction device is supported by the sound insulation board. When transmitted to the upper support portion 15a, the lower support portion 15b, the left support portion 15c, and the right support portion 15d via the members 14A to 14D, vibrations in the front-rear direction in the support portions 15a to 15d are first elastic members. 19 and the second elastic member 20 are transmitted to the sound insulation plate 13.

Since the first elastic member 19 and the second elastic member 20 are formed of vibration-damping sponge sheets having a longitudinal elastic modulus of 0.1 to 1.0 MPa, the first elastic member 19 and the second elastic member 20 are transmitted to the sound insulating plate 13 from the support portions 15a to 15d. Vibration can be reduced and a sufficient noise reduction effect can be exhibited.
In addition, the weight of the sound insulating plate 13 is entirely received by the support member 23 of the lower support portion 15b, and the contact area between the sound insulating plate 13 and the support member 23 is sufficiently small, so that the sound insulating plate 13 is passed through the support member 23. The transmitted vibration component can be reduced.

In addition, the vibration transmitted to the sound insulation board 13 through this support member 23 can be made smaller by forming the support member 23 in a roller shape or a spherical shape and enabling movement in the vibration direction.
As described above, according to the first embodiment, the upper support portion 15a, the lower support portion 15b, the left support portion 15c, and the left support portion 15d that support the sound insulating plate 13 are connected to the fixed frame portion 17, the support plate portion 18, With a simple configuration that only includes the first elastic member 19, the second elastic member 20, the bolt 22, and the support member 23, vibration transmitted to the sound insulating plate 13 can be reduced and a sufficient noise reduction effect can be exhibited. .

In addition, since the weight of the sound insulation plate 13 is received by the support member 23 having a larger longitudinal elastic coefficient than the first elastic member 19 and the second elastic member 20, the load of the sound insulation plate 13 can be reliably received by the support member 23. it can. For this reason, the longitudinal elastic modulus of the 1st elastic member 19 and the 2nd elastic member 20 can be made small enough, and the vibration transmissibility to the sound insulation board 13 can be reduced more.
Although not shown, a seal solvent is applied and solidified so as to prevent intrusion of rainwater so as to cover the inner peripheral surface of the outer first elastic member 19 and the contact surface of the sound insulating plate 13, thereby sealing the sealant. It is preferable to form a coating film.

  Moreover, although the said 1st Embodiment demonstrated each support part 15a-15c arrange | positioning the support plate part 18 on the outer side of the fixed frame part 17, it is not limited to this. That is, as shown in FIG. 5, a support plate portion 24 similar to the support plate portion 18 may be disposed inside the fixed frame portion 17. In this case, the fixed frame portion 17, the support plate portion 18, the first elastic member 19, the second elastic member 20, the gaskets 21 a and 21 b, and the support member 23 can be handled as one unit. In the state where the support portions 15a to 15d are attached to the sound insulation plate support members 14A to 14D with the bolts 22, the sound insulation plate 13 can be easily attached.

Next, a second embodiment of the present invention will be described with reference to FIG.
In the second embodiment, the sliding resistance between the sound insulating plate and the support member is further reduced.
That is, in the second embodiment, as shown in FIG. 6, a bent portion 25 is formed by bending the sound insulating plate 13 to the rear at the lower end surface position, and the lower surface of the bent portion 25 is supported by the support member 23. It is made to contact with the tip of. Other configurations have the same configurations as those of the first embodiment described above, and the same reference numerals are given to the corresponding portions to FIG. 3B, and the detailed description thereof will be omitted.

  According to the second embodiment, when the end surface of the sound insulating plate 13 is cut with a cutting machine, the cut surface becomes a rough surface, so that the contact resistance with the support member 23 increases, and the vibration transmissibility tends to increase. However, as in the second embodiment, the sound insulation plate 13 is bent and the flat surface of the bent portion 25 is brought into contact with the support member 23, thereby reducing the contact resistance with the support member 23 from the support member 23. The noise transmission effect can be further improved by reducing the vibration transmission rate to the sound insulating plate 13.

Next, an embodiment of the third embodiment of the present invention will be described with reference to FIG.
In the third embodiment, the fixing frame portion and the support plate portion constituting the support portion are individually fixed to the sound insulating plate support members 14A to 14D.
In 3rd Embodiment, the structure of each support part 15a-15d is changed with 1st and 2nd embodiment, and demonstrates the lower support part 15b as a representative. As shown in FIG. 7, the lower support portion 15b has a thin fixed frame portion 31 fixed to the outer side in the width direction of the sound insulating plate support member 14B (lower side in FIG. 7), and the inner side of the fixed frame portion 31 ( The support plate portion 32 is fixed to the upper side in FIG.

The fixed frame portion 31 is formed in a band plate shape having a small thickness and extending along the sound insulating plate support member 14B. One end along the longitudinal direction of the fixed frame portion 31 is fixed to the lower side of the central plate portion 14a of the sound insulating plate support member 14B by fixing means such as welding. A support member 33 that receives the lower end surface of the sound insulating plate 13 is formed on the upper surface of the fixed frame portion 31.
The support plate portion 32 is formed in a band plate shape whose thickness extending along the central plate portion 14a of the sound insulating plate support member 14B is substantially equal to the fixed frame portion 31. The support plate portion 32 is fixed to the central portion in the width direction of the central plate portion 14a via, for example, a cylindrical spacer 35 with a plurality of bolts 34 as fixing members at predetermined intervals in the longitudinal direction. The support plate portion 32 is in a fixed state of the central plate portion 14a, and the lower end along the longitudinal direction is opposed to the end portion on the opposite side to the fixed side of the fixed frame portion 31 with a predetermined gap, and the seal member 36 is in this gap. Has been placed.

On the other hand, the sound insulating plate 13 is formed with a through hole 37 having an inner diameter larger than the outer diameter of the spacer 35 at a position corresponding to the spacer 35. Similarly, similar through holes 40 and 41 are formed at positions facing the through holes 37 of the sound insulating plate of the first elastic member 38 and the second elastic member 39 in contact with the peripheral edge portion of the sound insulating plate 13.
The upper support portion 15a, the left support portion 15c, and the right support portion 15d have the same configuration as the lower support portion 15b except that the support member 33 is omitted. A through hole 37 is formed for insertion without contact.

  In order to attach the sound insulation plate 13 to the sound insulation plate support member 14B, the through holes 37 of the first elastic member 38 and the second elastic member 39 are formed on the front and rear surfaces around the through hole 37 of the sound insulation plate 13. Adhere in a coaxial state. In this state, the lower end surface of the sound insulating plate 13 is placed on the support member 33 of the fixed frame portion 31. Next, the bolt 34 is inserted into the through hole 32 a formed in the support plate portion 32, and the end of the bolt 34 protruding from the support plate portion 32 is inserted into the spacer 35, and the through hole 37 of the sound insulating plate 13 and the The spacer 35 is inserted into the through hole 40 of the first elastic member 38 and the through hole 41 of the second elastic member 39 without touching the through hole 37. In this state, the bolt 34 is screwed into the central plate portion 14a to fix the support plate portion 32 and the spacer 35 to the sound insulating plate support member 14B.

The other support portions 15 a, 15 c, and 15 d are also provided with bolts 34 inside the support plate portion 32 in the through hole 37 of the sound insulating plate 13, the through hole 40 of the first elastic member 38, and the through hole 41 of the second elastic member 39. The held spacer 35 is inserted so as not to contact, and the bolt 34 is screwed into the central plate portion 14a and fixed.
Although not shown, a sealing film is formed by applying a sealing material so as to cover the inner peripheral surface of the outer first elastic member 38, the inner peripheral surface of the support plate 32, and the periphery of the through hole 37 of the sound insulating plate 13. It is preferable to do.

  According to the third embodiment, the weight of the sound insulation plate 13 is received by the support member 33 formed on the fixed frame portion 31, and the vibration direction of the sound insulation plate 13 is independent from the fixed frame portion 31 and the sound insulation. It can be received by the first elastic member 38 and the second elastic member 39 interposed between the plate support members 14B. Since the support plate portion 32 of each of the support portions 15a to 15d is securely fixed to the sound insulating plate support members 14A to 14D with the direct bolts 34, the support portions 15a to 15d are further downsized while exhibiting a sufficient noise reduction effect. be able to. Furthermore, the fixed frame portion 31 can be omitted in the upper support portion 15a, the left support portion 15c, and the right support portion 15d, and the size can be further reduced.

In addition, in the said 1st-3rd embodiment, although it is preferable that the shape of the sound insulation board 13 arranges the thing of the same magnitude | size, it can also be set as a different magnitude | size and the shape is not limited to a rectangle. In addition, any shape of sound insulation board can be combined.
Moreover, in the said 1st-3rd embodiment, although the case where the sound-insulating board 13 was comprised with a damping steel plate was demonstrated, it is not limited to this, Arbitrary board materials, such as a normal steel plate and an aluminum alloy plate Can be applied.

  Moreover, in the said 1st-3rd embodiment, although the case where the 1st elastic member 19 (38) and the 2nd elastic member 20 (39) were separate bodies was demonstrated, it is not limited to this. In the upper support portion 15a, the left support portion 15c and the right support portion 15d excluding the lower support portion 15b, as shown in FIG. 8, the outer ends of the first elastic member 19 (38) and the second elastic member 20 (39) The parts may be integrated by connecting the connecting part 51 so as to straddle the end of the sound insulating plate 13. In this case, forgetting to attach one of the first elastic member and the second elastic member can be prevented, and when the upper support portion 15a is used, the first elastic member and the second elastic member fall. Can be prevented.

  Moreover, although the said 1st-3rd embodiment demonstrated the case where sound-insulation board support member 14A-14D was formed in cross-sectional U-shape, it is not limited to this, A cross-sectional square cylinder shape or Other cross-sectional shapes such as a solid cross-section can be used.

  DESCRIPTION OF SYMBOLS 11 ... Static induction electric machine body, 11a ... Magnetic core, 11b ... Winding, 12 ... Tank, 13 ... Sound insulation board, 14A-14D ... Sound insulation board support member, 15a ... Upper support part, 15b ... Lower support part, 15c ... Left support 15d ... right support part, 17 ... fixed frame part, 18 ... support plate part, 19 ... first elastic member, 20 ... second elastic member, 21a, 21b ... gasket, 22 ... bolt, 23 ... support member, 24 DESCRIPTION OF SYMBOLS ... Support plate part, 25 ... Bending part, 31 ... Fixed frame part, 32 ... Support plate part, 33 ... Support member, 34 ... Bolt, 35 ... Spacer, 36 ... Seal member, 37 ... Through-hole, 38 ... First elasticity Member, 39 ... second elastic member, 40, 41 ... through hole

Claims (7)

A stationary induction unit body,
A tank for storing the stationary induction main body;
A sound insulation board mounted on the outer surface of the tank;
A support portion that is formed on a side surface of the tank and supports a peripheral portion of the sound insulating plate;
The support portion includes a fixed frame portion facing a peripheral portion of the sound insulating plate fixed to the outer surface of the tank reinforcing member, a support plate portion facing the peripheral portion of the sound insulating plate from the outside, and front and back surfaces of the sound insulating plate. A first elastic member and a second elastic member that individually contact the peripheral portions of both surfaces; and a support member that supports the sound insulation plate formed on the fixed frame portion on which the weight of the sound insulation plate is applied.
The static induction appliance according to claim 1, wherein a longitudinal elastic modulus of the support member is larger than longitudinal elastic modulus of the first elastic member and the second elastic member.   2. The stationary induction device according to claim 1, wherein a longitudinal elastic modulus of the support member is smaller than longitudinal elastic modulus of the support portion, the fixed frame portion, and the support plate portion.   The stationary induction device according to claim 1, further comprising a fixing member that fixes the fixed frame portion and the support plate portion to an outer surface of the tank reinforcing member.   A fixing member for fixing the support plate portion to the outer surface of the tank reinforcing member via a spacer; and a through hole having an inner diameter larger than the outer diameter of the spacer is formed in the sound insulating plate; The stationary induction device according to claim 1, wherein the first elastic member and the second elastic member are arranged in the first and second elastic members.   The stationary guide according to any one of claims 1 to 4, wherein the support member is formed of an elastic member, and the first elastic member and the second elastic member are formed of a sponge sheet. Electricity.   The said 1st elastic member and the said 2nd elastic member are connected on the outer side of the outer periphery except the outer periphery which contacts the said supporting member of the said sound-insulation board, The any one of Claim 1 to 5 characterized by the above-mentioned. Static induction machine as described in the paragraph.   The stationary induction device according to any one of claims 1 to 6, wherein a bent portion is formed at a contact position of the sound insulating plate with the support member, and the bent portion is brought into contact with the support member. .

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