CN217214318U - Snake-shaped resistor - Google Patents
Snake-shaped resistor Download PDFInfo
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- CN217214318U CN217214318U CN202220238683.4U CN202220238683U CN217214318U CN 217214318 U CN217214318 U CN 217214318U CN 202220238683 U CN202220238683 U CN 202220238683U CN 217214318 U CN217214318 U CN 217214318U
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- resistor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a serpentine resistance adopts multilayer resistance to take the coincide back to bend the serpentine resistance who makes shape again, can reduce the minimum bend radius and the bending stress who allows to reduce the interval between the resistance area after the system of bending, make serpentine resistance more compact, with the power density who improves serpentine resistance. The S-shaped resistor has the characteristics of simple structure, simplicity and convenience in installation, low cost, good anti-seismic performance, safety and reliability.
Description
Technical Field
The utility model relates to a resistive material field, concretely relates to serpentine resistor.
Background
The resistance band is an electrical material which is widely applied, such as a crowbar resistor applied to a wind turbine generator or a brake resistor used for high-speed rails. Excess electrical energy is converted to thermal energy which is dissipated to the air by convection.
The crowbar resistor is formed by densely arranging resistor discs or resistor strips in an array manner, so that larger resistors are accommodated in the crowbar resistor with unit volume, the power density of the crowbar resistor is improved, and meanwhile, the resistor discs or the resistor strips are guaranteed to have gaps required by heat dissipation.
When a crowbar resistor is manufactured by using a resistor disc, the resistor disc and a porcelain piece are insulated and assembled together by using a string rod (screw rod). Due to the fact that the anti-seismic performance of the porcelain insulator is not ideal, when strong wind causes large vibration and impact of the wind turbine generator, the porcelain insulator can break or even fall off, short circuit is caused, and safety accidents are caused. And the existing crowbar resistor has the advantages of multiple parts, complex structure, high production cost and low production efficiency.
If the resistance band is bent to form the snake-shaped resistor with continuous U-shaped bends to manufacture the crowbar resistor, the snake-shaped resistor can be installed on a shell of the crowbar resistor by adopting screws or rivets, the structure of the crowbar resistor is greatly simplified, the production cost is reduced, the production efficiency is improved, and the crowbar resistor has excellent anti-seismic performance.
However, when the resistance band is bent into a U-shaped bend, if the resistance band is too thick and the bending radius is too small, i.e. when the ratio of the thickness of the resistance band to the bending radius is large, the deformation of the resistance band at the outer side of the U-shaped bend is large, which may cause the resistance band to crack or even break. Therefore, the problem of cracking of the resistance band during bending of the U-shaped bend is needed to be solved.
Through patent retrieval, with the utility model discloses there is following patent mainly to have the patent of certain relation:
1. the utility model relates to a resistor technical field, concretely relates to current-limiting resistor, its structure includes continuous bending forming's resistance area, each bending section of resistance area is arranged in the coplanar and the area face of resistance area aligns, each bending section place planar upper and lower side all has insulating connecting rod, insulating connecting rod has seted up the draw-in groove, the tape edge card of resistance area is in the draw-in groove, the insulating connecting rod that is located the upper side passes through the curb plate with the insulating connecting rod that is located the downside and is connected the end fixed connection of its the same one side with the both, this resistor has the installation of being convenient for, the advantage that maintenance convenience and voltage tolerance are good. However, the patent does not relate to the technical problem of bending the resistance band to make the U-shaped bend crack.
2. The utility model discloses a utility model patent of application number "201922070280.4", application date "2019.11.26", publication number "CN 211125208U", publication number "2020.07.28", name "a belt resistor convenient to install", applicant for "guangdong ford electronics limited company", this utility model's a belt resistor convenient to install, including two blocks of curb plates, screw rod, support frame and two resistance bands, every resistance band is the continuous circuitous crook; the support frame is insulated, the middle part of the support frame is provided with a mounting hole, the screw rod penetrates through the mounting hole, and two ends of the screw rod are respectively fixed on the two side plates; the top of the support frame is provided with a plurality of upper limiting grooves which are arranged side by side, and a plurality of sections of one resistance band are respectively embedded into the upper limiting grooves; the bottom of the support frame is provided with a plurality of lower limiting grooves which are arranged side by side, and a plurality of sections of the other resistance band are respectively embedded into the lower limiting grooves; hook-shaped parts are arranged at two end parts of the support frame, and the outermost section of the resistance band is clamped by the hook-shaped parts. The bracket does not need to be welded at the circuitous bent part of the resistance band like the traditional method, and the screw rod directly passes through the mounting hole of the support frame without being coated with mica on the surface of the screw rod, so the manufacturing is simple and the cost is saved. However, the patent does not relate to the technical problem of bending the resistance strip to make the U-shaped bend crack.
3. The utility model discloses a utility model patent of application number for "201621167383.2", application date for "2016.11.02", publication number for "CN 206274480U", publication date for "2017.06.23", the name is "a belt earthing resistor", the applicant is "guangdong ford electronics limited company", this utility model discloses a belt earthing resistor, including resistance row unit, resistance row unit includes resistance area, insulating part, boom and a plurality of supports, a plurality of supports all are connected with the boom and arrange along the length direction of boom, keep apart and fix through the insulating part between two adjacent supports, resistance area is integrated into one piece and continuous bending structure, and a plurality of bends and a plurality of supports of corresponding the arranging of resistance area, each bend of resistance area respectively with corresponding support welded fastening. Compared with the prior art, the resistance belt adopts an integrally formed continuous bending structure, so that the structure is simpler, and the production and manufacturing cost is lower; the support is welded and fixed with the resistor disc at the bent part of the resistor disc, the bent part of the resistor belt is firmly fixed, the isolation between two adjacent bent parts is guaranteed, point power generated under large current is prevented from causing deformation of the resistor disc, and the structure of the resistor disc is compact and stable. However, the patent does not relate to the technical problem of bending the resistance strip to make the U-shaped bend crack.
4. The utility model relates to a resistance ware technical field, concretely relates to current limiting resistor, its structure includes continuous bending forming's resistance area, each bending section of resistance area is arranged in the coplanar and the area face of resistance area aligns, each bending section is on the planar upper and lower side all has insulating connecting rod, insulating connecting rod has seted up the draw-in groove, the tape edge card of resistance area is in the draw-in groove, the insulating connecting rod that lies in the upper side passes through the curb plate with the insulating connecting rod that lies in the downside and is connected the end fixed of its the same one side of the two, this resistor has the installation of being convenient for, the advantage that maintenance convenience and voltage tolerance are good. However, the patent does not relate to the technical problem of bending the resistance strip to make the U-shaped bend crack.
5. The utility model discloses a utility model patent of application number "202022199132.5", application date "2020.09.29", publication number "CN 213935796U", publication number "2021.08.10", name "a kind of band resistor", applicant for "guangdong ford electronics limited company", this utility model's a band resistor, including curb plate, boom, retaining member, flat resistance area and a plurality of insulating holders, the middle part of a plurality of insulating holders is opened has the connecting hole, the boom passes the connecting hole of a plurality of insulating holders to arrange a plurality of insulating holders and bunch; the two sides of the insulating bases in the arrangement direction are provided with limiting grooves, the resistance band continuously bends to pass through the space between every two adjacent insulating bases, the narrow surfaces of all sections of the resistance band are respectively embedded into the limiting grooves of the two adjacent insulating bases, the wide surface of the flat resistance band faces to the direction perpendicular to the arrangement direction of the insulating bases, namely the narrow surfaces between the two adjacent sections of the same resistance band face to each other, and the wide surfaces face to each other in parallel. This patent, however, uses welding to produce the serpentine resistance strip rather than bending.
6. The utility model discloses an aluminum hull encapsulation energy resistor, include the resistance unit that fixes through fore-stock and after-poppet including "202021168576.6", application date is "2020.06.22", the publication number is "CN 212434372U", the publication date is "2021.01.29", the name is "an aluminum hull encapsulation energy resistor", the applicant is "Shanghai Yingfeng electronics branch of academic or vocational study limited company", the utility model discloses an aluminum hull encapsulation energy resistor, include by radiator aluminum hull, snakelike resistance band, front and back seal aluminum plate, porcelain frame, the fixed porcelain of afterbody, the mica spacer, wide mica piece, narrow mica piece, outlet wire porcelain and high temperature wire equipment constitute, use stainless steel pipe spool crimping and welding between snakelike resistance band and the high temperature wire, realize electrical connection. The utility model discloses an adopt snakelike resistance area, it is fixed through porcelain frame and the fixed porcelain of afterbody, the embedment is in the radiator aluminum hull, and snakelike resistance area can automatic batch processing, and this kind of resistance has small, and energy density is big, high protection level, impact resistance is good, insulating properties is high, advantages such as safe and reliable. However, the patent also does not relate to the technical problem of bending the resistance band to make the U-shaped bend crack.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to the defect that exists among the prior art, provide a snakelike resistance.
In order to solve the technical problem, the utility model discloses the technical scheme who takes does: a serpentine resistor is formed from a resistor strip bent into a serpentine shape having a plurality of successive U-bends. The snake-shaped resistor is formed by overlapping at least two layers of resistor belts. In the bending process, the resistance bands of different layers can slide relatively, so that the bending strain and the bending stress of the outer resistance band during bending are reduced. So as to reduce the minimum allowable bending radius and bending stress, thereby reducing the distance between the resistance bands, and enabling the serpentine resistance to be more compact so as to improve the power density of the serpentine resistance.
Further, mounting holes are formed in the bottom of the U-shaped bend of the snake-shaped resistor; the diameter of the mounting hole is less than or equal to the width of the resistance band/3. Avoid having reduced snakelike resistance's intensity, increased snakelike resistance's resistance because of the mounting hole is too big. Each U-shaped bend of the serpentine resistor can be mounted on the shell, so that the overall rigidity and the seismic performance of the serpentine resistor are improved. Because snakelike resistance adopts screw or rivet direct mount on insulating curb plate, simple structure, simple installation, production efficiency are high, with low costs, do not adopt breakable porcelain insulator moreover, have excellent anti-seismic performance.
Furthermore, the end part of the snake-shaped resistor is provided with a connecting plate, and the connecting plate is provided with a connecting hole so as to be conveniently connected with a circuit.
Furthermore, the thickness of the connecting plate is not less than that of the snake-shaped resistor, so that the connecting resistance is reduced, and the connection reliability is guaranteed.
Furthermore, the width of the resistance belt is not less than 1.5 times and not more than 3 times. To further reduce the connection resistance.
Further, the connecting plate is connected with the end of the serpentine resistor in a welding mode.
Further, the connecting plate is connected with the end part of the serpentine resistor in an offset mode. Make one side of connecting plate flush with one side of snakelike resistance, the clearance between connecting plate and the casing is the same with the clearance between snakelike resistance and the casing after the installation to guarantee to have the same creepage distance, ensure safety.
Further, the connecting plate adopts the copper bar to further reduce connecting resistance. The heating value of the connecting position is reduced, the client cable is protected, and reliable connection is ensured.
Furthermore, the resistance belt is made of stainless steel, so that rusting is prevented, faults are reduced, and the service life is prolonged.
Further, 316 stainless steel is adopted as the resistance band.
The utility model has the advantages that: the serpentine resistor formed by bending after the plurality of layers of resistor bands are overlapped can reduce the allowable minimum bending radius and the allowable bending stress, so that the distance between the bent resistor bands is reduced, the serpentine resistor is more compact, and the power density of the serpentine resistor is improved. And the serpentine resistor has the characteristics of simple structure, simple and convenient installation, low cost, good earthquake resistance, safety and reliability.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of a serpentine resistor,
figure 2 is a schematic diagram of a serpentine resistor in elevation,
figure 3 is a schematic top view of a serpentine resistor,
figure 4 is a side view schematic diagram of a serpentine resistor,
figure 5 is an enlarged view of a portion of figure 3,
figure 6 is an enlarged view of part B of figure 4,
in the figure: 1-snake-shaped resistor, 11-resistor band, 12-mounting hole, 13-connecting plate, 14-connecting hole. d, the diameter of the mounting hole, h1, the thickness of the resistor strip, h1/2, half of the thickness of the resistor strip, h2, the thickness of the connecting plate, K1, the width of the resistor strip and K2, the width of the connecting plate.
Detailed Description
The invention will be further described by means of specific embodiments and with reference to the accompanying drawings:
utility model's snakelike resistance 1 is shown in fig. 1 to 6: two layers of resistive strip 11 with thickness h1/2 were used instead of resistive strip 11 with thickness h 1. During bending, relative sliding can be generated between the two layers of the resistive bands, so that bending strain and bending stress when the outer resistive band 11 is bent are reduced. The mode of bending the serpentine resistor by the laminated resistor band can avoid cracks during bending. Therefore, the bending radius is reduced to reduce the distance between the resistance belts 11, so that the serpentine resistance structure is compact, and the power density of the serpentine resistance and the crowbar resistance is improved.
Mounting holes 12 are formed in the U-shaped bent bottom of the snake-shaped resistor 1; the diameter d of the mounting hole is less than or equal to the width K1/3 of the resistor strip. The strength of the serpentine resistor 1 is prevented from being reduced and the resistance of the serpentine resistor 1 is prevented from being increased due to the fact that the mounting holes 12 are too large. Adopt the rivet to connect serpentine resistor 1 on the mounting panel, the simple installation, the installation effectiveness is high, and the riveting can not produce like threaded connection not hard up in addition during the vibration, also does not have breakable porcelain insulator, has excellent anti-seismic performance.
The inlet and outlet ends of the snake-shaped resistor 1 are provided with connecting plates 13, and the connecting plates 13 are provided with connecting holes 14. Facilitating connection to the circuit.
The thickness h2 of the connecting plate is not less than the thickness h1 of the serpentine resistor; the width K1 of the resistance band is not less than 1.5 times and the width K2 of the connecting plate is not less than 3 times and the width K1 of the resistance band is not less than 3 times; so as to reduce the connection resistance and ensure the connection reliability.
The connecting plate 13 is connected with the business turn over end biasing of serpentine resistance 1, and one side of connecting plate 13 flushes with one side of serpentine resistance 1 for the clearance between connecting plate 13 and the casing is the same with the clearance between serpentine resistance 1 and the casing after the installation, in order to guarantee to have the same creepage distance, ensures safety.
The connecting plate 13 is made of copper bars to further reduce the connecting resistance. The heating value of the connecting resistance and the connecting position is reduced, the client cable is protected, and reliable connection is ensured.
The resistance belt 11 is made of 316 stainless steel, so that rusting is prevented, faults are reduced, and the service life is prolonged.
In summary, the following steps: the beneficial effects of the utility model are that: the serpentine resistor formed by bending after the plurality of layers of resistor bands are overlapped can reduce the allowable minimum bending radius and the allowable bending stress, so that the distance between the bent resistor bands is reduced, the serpentine resistor is more compact, and the power density of the serpentine resistor is improved. And the serpentine resistor has the characteristics of simple structure, simple and convenient installation, low cost, good earthquake resistance, safety and reliability.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (10)
1. A serpentine resistor is formed by bending a resistor strip into a serpentine shape with a plurality of continuous U-shaped bends, and is characterized in that: the snake-shaped resistor (1) is formed by overlapping at least two layers of resistor belts (11).
2. The serpentine resistor as claimed in claim 1, wherein: mounting holes (12) are formed in the U-shaped bent bottom of the snake-shaped resistor (1); the diameter (d) of the mounting hole is less than or equal to the width (K1)/3 of the resistor band.
3. The serpentine resistor of claim 2, wherein: the end part of the snake-shaped resistor (1) is provided with a connecting plate (13), and the connecting plate (13) is provided with a connecting hole (14).
4. The serpentine resistor of claim 3, wherein: the web thickness (h 2) is not less than the serpentine resistor thickness (h 1).
5. The serpentine resistor as set forth in claim 4, wherein: and the width (K1) of the resistor strip is more than or equal to 1.5 times, the width (K2) of the connecting plate is more than or equal to 3 times, and the width (K1) of the resistor strip is less than or equal to 3 times.
6. The serpentine resistor as defined in claim 5 wherein: the connecting plate (13) is connected with the end part of the snake-shaped resistor (1) in a welding way.
7. The serpentine resistor as set forth in claim 6, wherein: the connecting plate (13) is connected with the end part of the snake-shaped resistor (1) in an offset way.
8. The serpentine resistor as set forth in claim 7, wherein: the connecting plate (13) adopts copper bars.
9. The serpentine resistor according to any one of claims 1 to 8, wherein: the resistance belt (11) is made of stainless steel.
10. The serpentine resistor as set forth in claim 9, wherein: the resistance band (11) adopts 316 stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220238683.4U CN217214318U (en) | 2022-01-28 | 2022-01-28 | Snake-shaped resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220238683.4U CN217214318U (en) | 2022-01-28 | 2022-01-28 | Snake-shaped resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217214318U true CN217214318U (en) | 2022-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220238683.4U Active CN217214318U (en) | 2022-01-28 | 2022-01-28 | Snake-shaped resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217214318U (en) |
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2022
- 2022-01-28 CN CN202220238683.4U patent/CN217214318U/en active Active
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