CN202394661U

CN202394661U - Uniform stress tensioning structure for multistage stepped iron yokes of large transformer

Info

Publication number: CN202394661U
Application number: CN201120475993XU
Authority: CN
Inventors: 朱勤; 王伟
Original assignee: Shanghai Baosteel Equipment Maintenance Co Ltd
Current assignee: Shanghai Baosteel Equipment Maintenance Co Ltd
Priority date: 2011-11-25
Filing date: 2011-11-25
Publication date: 2012-08-22
Anticipated expiration: 2021-11-25

Abstract

The utility model discloses a uniform stress tensioning structure for multistage stepped iron yokes of a large transformer, and is characterized in that an upper iron yoke and a lower iron yoke are filled with steeped cushion blocks on a left upper part, a right upper part, a left lower part and a right lower part on a 1/2 of place between columns, one faces of the steeped cushion blocks are stepped and are matched with the shapes of the iron yokes, and the other faces of the steeped cushion blocks are chamfer inclined planes, supporting plates provided with through holes are respectively obliquely arranged on lateral angle ends of a pair of upper clamps and a pair of lower clamps, bandages, which are provided with screw pull frames on the both ends, are respectively encircled and covered on the chamfer inclined planes of the stepped cushion blocks on the upper part and the lower part of the upper iron yoke and the lower iron yoke, and screws on the both ends penetrate through the through hole of the corresponding supporting plates and are suspended by nuts. According to the tensioning structure, the local deformation of the multistage stepped iron yokes of the large transformer is avoided, the uniform stress of each stage of step of the iron yoke is ensured, the tensioning structure is beneficial for reducing the operation noise of a transformer main body, and the occurrence of a sheet slip phenomenon of a silicon steel sheet is avoided.

Description

The even stressed tension structure of the multistage stairstepping iron of high-power transformer yoke

Technical field

The utility model relates to the even stressed tension structure of the multistage stairstepping iron of a kind of high-power transformer yoke.

Background technology

The basic principle of transformer is an electromagnetic induction principle; Just form by circuit and magnetic circuit; Magnetic circuit partly is called as iron core; It is wide and be multistage ladder stack and constitute that the iron core of high-power transformer then cuts into different sheets by more and more thinner cold-rolled orientation silicon steel sheet, and the stem stem of iron core is external rounded, the external rounded or ellipse garden of upper and lower iron yoke shape.

For transformer core; After accomplishing, the silicon steel sheet stack needs make iron core become firm, smooth, as to clamp an integrated transformers framework, to sustain lifting, product in the transformer manufacture process cast net operating various vibration and active force by means of means such as anchor clamps, arm-tie, stem stem binding strap, iron yoke bandage and strutting pieces.Usually the clamping of the top iron yoke of high-power transformer iron core and bottom iron yoke silicon steel sheet is employing both sides anchor clamps, strutting piece, bandage comes firm and improve its mechanical strength.As depicted in figs. 1 and 2; The iron core 1 of transformer is a three-phase three-limb; The minimum one-level silicon steel sheet of each stem stem is provided with arm-tie 2 outward; Several stem stem binding strap 4 is by setting the spacing colligation in arm-tie 2 outsides of stem stem, and multistage Step Circular upper yoke 5 and multistage Step Circular lower yoke 6 place the top and the bottom of iron core 1 framework respectively, and pair of upper anchor clamps 7 lay respectively at the upper yoke 5 and lower yoke 6 left and right sides with a pair of lower clamp 8; The two ends that strutting piece 3 is arranged at pair of upper anchor clamps 7 and a pair of lower clamp 8 are used to clamp upper clamp 7 and lower clamp 8; Insulating board 10 pad is placed on the inside casing side steps surface of upper yoke 5 and lower yoke 6 intercolumniations 1/2, and circular arc bandage 11 is positioned at insulating board 10 surfaces, and the symmetry joint 12 of trying to stop people from fighting each other is respectively established at circular arc bandage 11 two ends; The joint 12 of trying to stop people from fighting each other is provided with fastening screw 15; Fixed head 13 is welded on the corresponding position that pair of upper anchor clamps 7 and a pair of lower clamp 8 are provided with circular arc bandage 11 two ends, and the fastening screw 15 in the joint 12 of trying to stop people from fighting each other passes the through hole of fixed head 13, and nut 14 hangs tight fastening screw 15 in the joint 12 of trying to stop people from fighting each other; To clamp insulating board 10 through circular arc bandage 11, above-mentioned each parts and mutual connection cooperation have constituted the iron core bearing frame.

Can find out from said structure; The circular arc bandage of being located at the inside casing side at two intercolumniation 1/2 places of upper yoke and lower yoke only touches the part ladder wedge angle of upper yoke and lower yoke;, only plays by the circular arc bandage effect after tightening up with left and right sides clamp; Iron yoke clamping force under this state be through about the minimum level sheet transmit inwards, but along with the wide increasing step by step of sheet, increase part and can not get the efficient pressure point.The strutting piece of being located at the housing side at two intercolumniation 1/2 places of upper and lower iron yoke simultaneously is the rigidity structure; Only play the effect that limits distance in the anchor clamps after the clamp of the left and right sides; Have no with upper and lower iron yoke ladder to contact, there is the thrust problem of non-uniform equally in this regional stepped portion; Said structure causes transformer body running noises to increase, and the little level sheet of the relative circular arc bandage of iron yoke the slide plate phenomenon occurs sometimes because of lacking effective strong point after the transformer long-time running in addition.

Summary of the invention

The utility model technical problem to be solved provides the even stressed tension structure of the multistage stairstepping iron of a kind of high-power transformer yoke; This tension structure has been avoided the multistage stairstepping iron of high-power transformer yoke local deformation; Every grade of ladder guaranteeing the iron yoke is stressed evenly; Help reducing transformer body running noises, prevented the generation of silicon steel sheet slide plate phenomenon.

For solving the problems of the technologies described above; The even stressed tension structure of the multistage stairstepping iron of the utility model high-power transformer yoke comprises three-phase three-limb high-power transformer iron core framework, upper yoke, lower yoke, pair of upper anchor clamps and a pair of lower clamp; Said upper yoke and lower yoke place the top and the bottom of said iron core framework respectively; Said pair of upper anchor clamps and a pair of lower clamp are located at the left and right sides of said upper yoke and lower yoke respectively; Said pair of upper anchor clamps and a pair of lower clamp two ends are fastening through horizontal support member respectively; This tension structure comprises that also eight stairstepping cushion blocks, eight have the supporting bracket of through hole, four two ends are provided with the bandage that screw rod is tried to stop people from fighting each other; Said stairstepping cushion block is the corner cut inclined-plane for stairstepping, another side with iron yoke form fit simultaneously; Said eight stairstepping cushion blocks are located at upper left side, upper right side, lower left, the lower right of said upper yoke and lower yoke respectively and are positioned at 1/2 place of said iron core frame column spacing; The stairstepping cushion block of the said upper and lower that is positioned at upper yoke and lower yoke is symmetric arrangement in opposite directions; Said eight supporting brackets constant tilt respectively are located at said pair of upper anchor clamps and a pair of lower clamp outboard end angle, and the screw rod at corner cut inclined-plane and two ends that said four bandages enclose the stairstepping cushion block of the upper and lower that is overlying on said upper yoke and lower yoke respectively penetrates respectively in the supporting bracket through hole of respective sides and adopts nut to hang tight.

Further, it is degree of lip-rounding frame that the screw rod at above-mentioned bandage two ends is tried to stop people from fighting each other, and said degree of lip-rounding frame one side connects said bandage one end, and the said degree of lip-rounding frame other end connects said screw rod one end.

Because the even stressed tension structure of the multistage stairstepping iron of the utility model high-power transformer yoke has adopted technique scheme; Be that upper yoke and lower yoke are filled the stairstepping cushion block respectively in upper left side, upper right side, lower left, the lower right at intercolumniation 1/2 place; The stairstepping cushion block is the corner cut inclined-plane for stairstepping, another side with iron yoke form fit simultaneously; Pair of upper anchor clamps and a pair of lower clamp lateral angle end are obliquely installed the supporting bracket that has through hole respectively, and two ends are provided with the through hole that the screw rod at corner cut inclined-plane and two ends that bandage that screw rod tries to stop people from fighting each other encloses the stairstepping cushion block of the upper and lower that is overlying on upper yoke and lower yoke respectively penetrates the respective support plate and adopt nut to hang tight.This tension structure has been avoided the multistage stairstepping iron of high-power transformer yoke local deformation, guarantees that every grade of ladder of iron yoke is stressed even, helps reducing transformer body running noises, has prevented the generation of silicon steel sheet slide plate phenomenon.

Description of drawings

Below in conjunction with accompanying drawing and execution mode the utility model is done further to specify:

Fig. 1 is the structural representation of general high-power transformer;

Fig. 2 is that the A-A of Fig. 1 is to view;

Fig. 3 is the sketch map of the even stressed tension structure of the multistage stairstepping iron of this high-power transformer yoke;

Fig. 4 is that the A-A of Fig. 3 is to view.

Embodiment

Like Fig. 3 and shown in Figure 4; The even stressed tension structure of the multistage stairstepping iron of the utility model high-power transformer yoke comprises three-phase three-limb high-power transformer iron core 1 framework, upper yoke 5, lower yoke 6, pair of upper anchor clamps 7 and a pair of lower clamp 8; Said upper yoke 5 and lower yoke 6 place the top and the bottom of said iron core 1 framework respectively; Said pair of upper anchor clamps 7 and a pair of lower clamp 8 are located at the left and right sides of said upper yoke 5 and lower yoke 6 respectively; Said pair of upper anchor clamps 7 are fastening through horizontal support member 3 respectively with a pair of lower clamp 8 two ends; This tension structure comprises that also eight stairstepping cushion blocks 21, eight have the supporting bracket 22 of through hole, four two ends and are provided with try to stop people from fighting each other 23 bandage 25 of screw rod 24; Said stairstepping cushion block 21 one sides are the corner cut inclined-plane for stairstepping, another side with iron yoke form fit; Said eight stairstepping cushion blocks 21 are located at upper left side, upper right side, lower left, the lower right of said upper yoke 5 and lower yoke 6 respectively and are positioned at 1/2 place of said iron core 1 frame column spacing; The stairstepping cushion block 21 of the said upper and lower that is positioned at upper yoke 5 and lower yoke 6 is symmetric arrangement in opposite directions; Said eight supporting brackets 22 constant tilt respectively are located at said pair of upper anchor clamps 7 and a pair of lower clamp 8 outboard end angles, and the screw rod 24 at corner cut inclined-plane and two ends that said four bandages 25 enclose the stairstepping cushion block 21 of the upper and lower that is overlying on said upper yoke 5 and lower yoke 6 respectively penetrates respectively in supporting bracket 22 through holes of respective sides and adopts nut 26 to hang tight.

Further, for ease of being connected of bandage two ends and supporting bracket, make things convenient for hanging tight of bandage, it 23 is degree of lip-rounding framves that the screw rod 24 at above-mentioned bandage two ends is tried to stop people from fighting each other, and said degree of lip-rounding frame one side connects said bandage 25 1 ends, and the said degree of lip-rounding frame other end connects said screw rod 24 1 ends.

This tension structure is arranged on the upper yoke and lower yoke at 1/2 place of each intercolumniation of high-power transformer iron core framework; Promptly for the three-phase three-limb high-power transformer; Upper yoke and lower yoke respectively are provided with two this tension structures; For the three-phase five-limb high-power transformer, upper yoke and lower yoke respectively are provided with four this tension structures; The every place of this tension structure is the stairstepping cushion block on corner cut inclined-plane by one side for stairstepping, another side; Through cooperating with every grade of ladder of upper and lower iron yoke; The formation center is iron yoke and four entities that the angle is filled by the stairstepping cushion block, and promptly the cascaded surface of stairstepping cushion block places four bights and every grade of ladder of upper and lower iron yoke to match, and the another side of stairstepping cushion block is the plane near the big level sheet of upper and lower iron yoke; And flush with the big level sheet of iron yoke; Interlude is one section circular arc, and back one section little level sheet near the iron yoke is the corner cut inclined-plane, then two ends is had the above and below that bandage that symmetry tries to stop people from fighting each other is placed on upper and lower iron yoke and stairstepping cushion block composition entity respectively; Screw rod on trying to stop people from fighting each other adopts nut progressively to tighten after passing the supporting bracket through hole of correspondence position setting on the upper and lower anchor clamps; Make bandage strained gradually, power is delivered on every grade of ladder of iron yoke along plane, circular arc, the corner cut inclined-plane of stairstepping cushion block, thus every grade of silicon steel sheet of iron yoke is fastening; Utilize this tension structure to avoid the multistage stairstepping iron of transformer yoke local deformation, guarantee that every grade of ladder of iron yoke is stressed even, help reducing transformer body running noises, can also prevent the slide plate of iron yoke silicon steel sheet.

Claims

1. even stressed tension structure of the multistage stairstepping iron of high-power transformer yoke; Comprise three-phase three-limb high-power transformer iron core framework, upper yoke, lower yoke, pair of upper anchor clamps and a pair of lower clamp; Said upper yoke and lower yoke place the top and the bottom of said iron core framework respectively; Said pair of upper anchor clamps and a pair of lower clamp are located at the left and right sides of said upper yoke and lower yoke respectively; Said pair of upper anchor clamps and a pair of lower clamp two ends are fastening through horizontal support member respectively; It is characterized in that: this tension structure comprises that also eight stairstepping cushion blocks, eight have the supporting bracket of through hole, four two ends are provided with the bandage that screw rod is tried to stop people from fighting each other; Said stairstepping cushion block is the corner cut inclined-plane for stairstepping, another side with iron yoke form fit simultaneously; Said eight stairstepping cushion blocks are located at upper left side, upper right side, lower left, the lower right of said upper yoke and lower yoke respectively and are positioned at 1/2 place of said iron core frame column spacing; The stairstepping cushion block of the said upper and lower that is positioned at upper yoke and lower yoke is symmetric arrangement in opposite directions; Said eight supporting brackets constant tilt respectively are located at said pair of upper anchor clamps and a pair of lower clamp outboard end angle, and the screw rod at corner cut inclined-plane and two ends that said four bandages enclose the stairstepping cushion block of the upper and lower that is overlying on said upper yoke and lower yoke respectively penetrates respectively in the supporting bracket through hole of respective sides and adopts nut to hang tight.

2. the even stressed tension structure of the multistage stairstepping iron of high-power transformer according to claim 1 yoke; It is characterized in that: it is degree of lip-rounding frame that the screw rod at said bandage two ends is tried to stop people from fighting each other; Said degree of lip-rounding frame one side connects said bandage one end, and the said degree of lip-rounding frame other end connects said screw rod one end.