CN109541508B - Main magnetic flux test platform of multi-combination type transformer iron core - Google Patents
Main magnetic flux test platform of multi-combination type transformer iron core Download PDFInfo
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- CN109541508B CN109541508B CN201811549354.6A CN201811549354A CN109541508B CN 109541508 B CN109541508 B CN 109541508B CN 201811549354 A CN201811549354 A CN 201811549354A CN 109541508 B CN109541508 B CN 109541508B
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- 238000012360 testing method Methods 0.000 title claims abstract description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 230000004907 flux Effects 0.000 title claims abstract description 19
- 238000011160 research Methods 0.000 claims abstract description 14
- 238000010276 construction Methods 0.000 claims abstract description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1253—Measuring galvano-magnetic properties
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a multi-combination type transformer core main magnetic flux test platform which comprises a base platform and a plurality of core frame units arranged on the base platform, wherein each core frame unit can move on the base platform along a preset track and is combined with at least one other core frame unit to form a corresponding type of transformer test core. According to the invention, on one test platform, the construction of the main magnetic flux test research platform of the iron cores of the various types of transformers is realized by changing the combination mode of the iron core frame units, and compared with the prior art, the invention saves cost, reduces occupied space and is convenient to manage.
Description
Technical Field
The invention relates to the technical field of transformer manufacturing, in particular to a multi-combination type transformer core main magnetic flux test platform.
Background
Transformers are important equipment of power plants and substations, and have important influences on power supply quality and operation stability of a power system. With the development of the electric power technology in China, the requirements on the power grid transmission capacity are continuously improved, and high-capacity transformers such as extra-high voltage transformers and the like are generated. According to the data provided by the national power grid company, the ultra-high voltage direct current power grid of one loop can transmit 600 kilowatts of electric quantity, which is equivalent to 5 to 6 times of the existing 500 kilovolt direct current power grid, and the power transmission distance is 2 to 3 times of the existing 500 kilovolt direct current power grid, so that the power transmission efficiency is greatly improved. In addition, according to the measurement and calculation of the national power grid company, the electric quantity with the same power is transmitted, and if the ultra-high voltage line is adopted for transmission, about 60% of land resources can be saved compared with the 500 kilovolt high voltage line.
The main core structure of the ultrahigh voltage transformer and the high-capacity field assembled transformer is formed by combining a plurality of mutually independent core basic units, and the ultrahigh voltage transformer and the high-capacity field assembled transformer can be divided into a single-phase three-column core, a single-phase four-column core, a single-phase five-column core and a three-phase five-column core according to the number of the core columns. As the voltage class of the transformer is higher and higher, the capacity is larger and larger, and the development difficulty of the transformer is also larger and larger. The reliability of the main magnetic circuit design of the transformer core is very important, and in the research and development process, intensive main magnetic flux test research is often required. However, since the number of kinds of cores is large, if all kinds of cores are individually molded for research, there are disadvantages in that the cost is high, the occupied space is large, and management is difficult.
Disclosure of Invention
The present invention has been made to solve at least partially the technical problems occurring in the prior art.
The technical scheme adopted for solving the technical problems of the invention is as follows:
the invention provides a multi-combination type transformer core main magnetic flux test platform which comprises a base platform and a plurality of core frame units arranged on the base platform, wherein each core frame unit can move on the base platform along a preset track and is combined with at least one other core frame unit to form a corresponding type of transformer test core.
Optionally, any two iron core frame units can be connected into a whole through at least one set of inter-unit locking device.
Optionally, each set of the inter-unit locking means includes a bridge provided at an edge of one of the core frame units and a bridge provided at an edge of the other of the core frame units and mated with the bridge.
Optionally, the lap joint piece adopts a hook, and the lap joint piece adopts a positioning pin; the tail of the hook is hinged with the edge of the iron core frame unit where the hook is located, the head of the hook is provided with a columnar groove extending along the thickness direction of the hook so as to form an inner circular arc of the head of the hook, and the diameter of the locating pin is matched with the diameter of the inner circular arc of the head of the hook.
Optionally, the base platform includes a planar plate and an orthogonal spacing rail disposed on the planar plate; each iron core frame unit comprises a magnetic circuit and a plurality of first universal wheels arranged at the bottom of the magnetic circuit, and the first universal wheels can freely slide on the orthogonal limiting guide rail.
Optionally, the orthogonal limit guide rail includes two first guide rails that are arranged in parallel and extend along a first direction, an even number of second guide rails that are arranged in parallel and extend along a second direction, and a plurality of limit switches; the ends of the even number of second guide rails are connected with one first guide rail and simultaneously cross the other first guide rail.
Optionally, the base platform further comprises a plurality of second universal wheels disposed at the bottom of the flat plate.
Optionally, each of the core frame units further includes a clamping device disposed on top of the magnetic circuit and having a clamping function.
Optionally, the clamping device comprises two clamping plates which are respectively arranged on the front surface and the rear surface of the top of the iron core frame unit and are oppositely arranged, and at least one cross beam which is arranged between the two clamping plates and tightens the two clamping plates.
Optionally, the test platform further comprises an insulating plate disposed between each of the core frame units in combination.
Optionally, the test platform further comprises at least one toolbox disposed on the base platform.
The beneficial effects are that:
according to the invention, on one test platform, the construction of the main magnetic flux test research platform of the iron cores of the various types of transformers is realized by changing the combination mode of the iron core frame units, and compared with the prior art, the invention saves cost, reduces occupied space and is convenient to manage.
Drawings
Fig. 1 is an overall layout diagram of a main magnetic flux test platform of a multi-combination transformer core according to an embodiment of the present invention;
fig. 2a is a schematic structural diagram of a left core frame unit according to an embodiment of the present invention;
fig. 2b is a schematic structural diagram of a middle core frame unit according to an embodiment of the present invention;
fig. 2c is a schematic structural diagram of a right iron core frame unit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a base platform according to an embodiment of the present invention;
fig. 4 is a top view of a five-leg core assembly according to an embodiment of the present invention;
fig. 5 is a top view of a four-leg core assembly according to an embodiment of the present invention;
fig. 6 is a top view of a three-leg core assembly according to an embodiment of the present invention.
In the figure: 1-a left iron core frame unit; 2-an intermediate core frame unit; 3-right side core frame units; 4-a base platform; 5-a tool box; 6-magnetic circuit; 7-clamping means; 8-inter-unit locking means; 9-a first universal wheel; 10-orthogonal spacing rails; 11-plates; 12-a second universal wheel; 13-insulating plate.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and examples for better understanding of the technical scheme of the present invention to those skilled in the art.
In the description of the present invention, it should be understood that the terms "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1, the present embodiment provides a multi-combination type transformer core main magnetic flux test platform, which includes: the transformer test iron core comprises a base platform 4 and a plurality of iron core frame units arranged on the base platform 4, wherein each iron core frame unit can move on the base platform 4 along a preset track and is combined with at least one other iron core frame unit to form a transformer test iron core of a corresponding type.
Wherein, the number of setting up the iron core frame unit on the base platform is at least three, is respectively: the specific number of the left side core frame unit, the at least one middle core frame unit, and the right side core frame unit may be set by those skilled in the art according to actual circumstances. Taking a total of four core frame units disposed on the base platform as an example, as shown in fig. 1, the four core frame units are respectively: the left side core frame unit 1, the two middle core frame units 2 and the right side core frame unit 3, of course, the present invention is not limited thereto, and it is also within the scope of the present invention to provide a greater number of core frame units on the base platform.
In the embodiment, on a test platform, the construction of the main magnetic flux test research platform of the transformer iron cores of various types is realized by changing the combination mode of the iron core frame units, compared with the prior art, the cost is saved, the occupied space is reduced, and the management is convenient. For example, the test platform can realize the purpose of simultaneously researching main magnetic flux distribution of the single-phase three-column, single-phase four-column and single-phase five-column or three-phase five-column transformer cores by changing the combination mode of the iron core frame units, solves the problems of high cost, large occupied space and difficult management in the prior art, and has the functions of weak coupling, strong coupling and improved strong coupling principle verification.
As shown in fig. 2a to 2c, any two core frame units can be connected together through at least one set of inter-unit locking devices 8.
Wherein each set of inter-unit locking means 8 comprises a bridge piece provided at an edge of one core frame unit and a bridge piece provided at an edge of the other core frame unit and matched with the bridge piece.
Specifically, the lap joint part adopts a lap hook, and the lap joint part adopts a positioning pin; the tail of the hook is hinged with the edge of the iron core frame unit where the hook is positioned, the head of the hook is provided with a columnar groove extending along the thickness direction of the hook so as to form an inner circular arc of the head of the hook, and the diameter of the positioning pin is matched with the diameter of the inner circular arc of the head of the hook.
In the embodiment, through arranging the inter-unit locking device, all the combined iron core frame units are connected into a whole, so that the influence on the test result caused by the fact that the combined transformer test iron core is scattered in the process of corresponding test is avoided. In addition, in order to achieve a better fixing effect, two sets of locking devices between the iron core frame units are adopted between any two iron core frame units.
As shown in fig. 3, the base platform 4 includes a flat plate 11 and an orthogonal spacing rail 10 provided on the flat plate 11. As shown in fig. 2a to 2c, each core frame unit includes a magnetic circuit 6 and a plurality of first universal wheels 9 provided at the bottom of the magnetic circuit 6, and the first universal wheels 9 can freely slide on the orthogonal limit rails 10. Wherein, the orthogonal limit guide rail 10 can be fixed on the flat plate 11 by welding; four first universal wheels 9 can be arranged at the bottom of each iron core frame unit so that the iron core frame units can freely move on the guide rails.
Specifically, the orthogonal limit rail 10 includes two first rails disposed in parallel and extending in a first direction, an even number of second rails disposed in parallel and extending in a second direction, and a plurality of limit switches; the ends of the even number of second guide rails are connected with one first guide rail and simultaneously cross the other first guide rail. Wherein the first direction is preferably perpendicular to the second direction; the number of the second guide rails can be four; the number and positions of limit switches can be set by those skilled in the art according to the actual situation.
In the embodiment, through arranging the universal wheels at the bottom of each iron core frame unit and arranging the orthogonal limiting guide rail on the base platform, when each iron core frame unit moves along a preset track on the base platform, the friction force is small, and the iron core frame units can be pushed to move only by small power; moreover, the positioning precision is high, and the friction loss is small.
In addition, as shown in fig. 3, the base platform 4 further comprises a plurality of second universal wheels 12 arranged at the bottom of the flat plate 10, so that the whole test platform can be freely moved to a fixed point position according to working and storage requirements. Four second universal wheels 12 can be arranged at the bottom of the flat plate 10 so as to freely move the whole test platform.
As shown in fig. 2a to 2c, each core frame unit further comprises a clamping device 7 arranged on top of the magnetic circuit 6 and acting as a clamp.
Specifically, the clamping device 7 includes two oppositely disposed clamping plates respectively provided on the front and rear surfaces of the top of the core frame unit, and at least one cross member provided between and tightening the two clamping plates.
In this embodiment, by providing the clamping device for each core frame unit, the silicon steel sheet forming the magnetic circuit can be clamped, and the structure is simple and reliable.
As shown in fig. 4 to 6, the test bed further includes insulating plates 13 provided between the respective core frame units combined. Wherein, insulating plate 13 can adopt insulating rubber plate, and its thickness can be 3 ~ 5mm.
In this embodiment, by providing insulating plates between the respective core frame units combined, magnetic leakage can be reduced.
As shown in fig. 1, the test platform further comprises at least one tool box 5 provided on the base platform 4 for storing instruments, operating tools, etc.
The specific structure of the test platform will be described in detail with reference to fig. 1.
Four iron core frame units, namely a left iron core frame unit 1, two middle iron core frame units 2 and a right iron core frame unit 3, are arranged on the base platform 4, and a first universal wheel 9 capable of freely moving is arranged at the bottom of each iron core frame unit; the base platform 4 is also provided with an orthogonal limit guide rail 10, so that each iron core frame unit can move on the base platform 4 along the guide rail according to the need; the base platform 4 is also provided with two tool boxes 5 for storing instruments and operation tools and the like; the bottom of the whole test platform is also provided with a second universal wheel 12 which can move freely.
The base platform 4 can be divided into different functional areas, for example into a working area, a waiting area and an accessory area. The working area is used for assembling and testing the iron core frame units, the waiting area is used for storing the iron core frame units which are not involved in assembling temporarily, and the accessory area is used for placing a tool box so as to store basic tools required by installation and testing. According to the needs of research tests, the needed iron core frame units are placed in the working area of the base platform in a sliding mode along the orthogonal limiting guide rails, an insulating rubber plate with the thickness of 4mm is placed between every two needed iron core frame units, the needed iron core frame units are fixed into a whole through the inter-unit locking device, and the unnecessary iron core frame units are placed in the waiting area of the base platform in a sliding mode along the orthogonal guide rails.
The principle of assembling the test cores of the three-leg, four-leg and five-leg transformers will be described below based on the structure of the test platform shown in fig. 1, respectively.
As shown in fig. 4, four core frame units are placed in a working area along the orthogonal limit guide rail 10, an insulating rubber plate with the thickness of 4mm is placed between every two core frame units, and then the four core frame units are fixed into a whole through the inter-unit locking device 8 to form a transformer test core, so that the test core can be used for main magnetic flux test research of single-phase five-column or three-phase five-column transformer cores.
As shown in fig. 5, the left side core frame unit 1, one middle core frame unit 2 and the right side core frame unit are placed in the working area along the orthogonal limit guide rail 10, an insulating rubber plate with the thickness of 4mm is placed between every two core frame units, and then the three core frame units are fixed into a whole through the inter-unit locking device 8 to form a transformer test core, so that the test core can be used for main magnetic flux test research of a single-phase four-limb transformer core, and the other middle core frame unit 2 is placed in the waiting area.
As shown in fig. 6, the left and right core frame units 1 and 10 are placed in the working area along the orthogonal limit rail, an insulating rubber plate with a thickness of 4mm is placed between every two core frame units, and then the two core frame units are fixed into a whole by the inter-unit locking device 8 to form a transformer test core, so that the test core can be used for main magnetic flux test research of a single-phase three-limb transformer core, and the two middle core frame units are placed in the waiting area.
In summary, the present invention provides a multi-component transformer core main magnetic flux testing platform, which includes a freely movable base platform, a plurality of core frame units capable of moving in a directional manner, and at least one tool box. The multiple iron core frame units can move on the orthogonal limiting guide rail in an oriented mode and are combined freely according to research requirements, the three-column, four-column and five-column type transformer test iron cores can be assembled through simple operation, single-phase three-column, single-phase four-column and single-phase five-column or three-phase five-column type transformer iron core main magnetic flux test researches can be conveniently conducted on a test platform, a large amount of iron core manufacturing cost is saved, the space of a test room is saved, and the problems of high cost, large occupied space and difficult management in the prior art are solved. Moreover, the test platform has compact structure and convenient use, and is very suitable for basic scientific research in universities, research institutions and transformer factories; the whole test platform can also move freely, and is convenient to manage.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (11)
1. The multi-combination type transformer core main magnetic flux test platform is characterized by comprising a base platform and a plurality of core frame units arranged on the base platform, wherein each core frame unit can move on the base platform along a preset track and is combined with at least one other core frame unit to form a corresponding type of transformer test core; each iron core frame unit comprises a magnetic circuit, the magnetic circuit is formed by silicon steel sheets, and a plurality of types of transformer test iron cores are formed by changing the free combination mode of the iron core frame units, so that the construction of a main magnetic flux test research platform of the plurality of types of transformer iron cores is realized.
2. The test platform of claim 1, wherein any two of said core frame units are integrally connected by at least one inter-unit locking means.
3. A test platform according to claim 2, wherein each set of said inter-unit locking means comprises a bridge provided at an edge of one of said core frame units and a bridge provided at an edge of the other of said core frame units and mating with said bridge.
4. A test platform according to claim 3, wherein the bridge employs a hook and the overlapped member employs a locating pin; the tail of the hook is hinged with the edge of the iron core frame unit where the hook is located, the head of the hook is provided with a columnar groove extending along the thickness direction of the hook so as to form an inner circular arc of the head of the hook, and the diameter of the locating pin is matched with the diameter of the inner circular arc of the head of the hook.
5. The test platform of any one of claims 1-4, wherein the base platform comprises a planar plate and an orthogonal spacing rail disposed on the planar plate; each iron core frame unit further comprises a plurality of first universal wheels arranged at the bottom of the magnetic circuit, and the first universal wheels can freely slide on the orthogonal limiting guide rail.
6. The test platform of claim 5, wherein the orthogonal limit rail comprises two first rails disposed in parallel and extending in a first direction, an even number of second rails disposed in parallel and extending in a second direction, and a plurality of limit switches; the ends of the even number of second guide rails are connected with one first guide rail and simultaneously cross the other first guide rail.
7. The test platform of claim 5, wherein the base platform further comprises a plurality of second universal wheels disposed at the bottom of the plate.
8. The test platform of claim 5, wherein each of the core frame units further comprises a clamping device disposed on top of the magnetic circuit and acting as a clamp.
9. The test platform of claim 8, wherein the clamping means comprises two oppositely disposed clamping plates disposed on the front and rear surfaces of the top of the core frame unit, respectively, and at least one cross member disposed between and tensioning the clamping plates.
10. The test platform of any one of claims 1-4, further comprising insulating plates disposed between each of the core frame units in combination.
11. The test platform of any one of claims 1-4, further comprising at least one tool box disposed on the base platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811549354.6A CN109541508B (en) | 2018-12-18 | 2018-12-18 | Main magnetic flux test platform of multi-combination type transformer iron core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811549354.6A CN109541508B (en) | 2018-12-18 | 2018-12-18 | Main magnetic flux test platform of multi-combination type transformer iron core |
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| CN109541508A CN109541508A (en) | 2019-03-29 |
| CN109541508B true CN109541508B (en) | 2024-02-06 |
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| CN201811549354.6A Active CN109541508B (en) | 2018-12-18 | 2018-12-18 | Main magnetic flux test platform of multi-combination type transformer iron core |
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|---|---|
| CN109541508A (en) | 2019-03-29 |
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