CN209487273U - A kind of heat expansion-proof rupture resistor - Google Patents
A kind of heat expansion-proof rupture resistor Download PDFInfo
- Publication number
- CN209487273U CN209487273U CN201822007061.7U CN201822007061U CN209487273U CN 209487273 U CN209487273 U CN 209487273U CN 201822007061 U CN201822007061 U CN 201822007061U CN 209487273 U CN209487273 U CN 209487273U
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- resistor
- insulation sleeve
- resistor disc
- protrusion
- boom
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Abstract
A kind of heat expansion-proof of the utility model ruptures resistor, and including boom muti-piece resistor disc arranged side by side and muti-piece resistor disc is stringed together, boom string has multiple insulation sleeves for the electrical isolation between adjacent two pieces of resistor discs；Insulation sleeve is extended axially by protrusion, resistor disc cover outside protrusion so that being separated between resistor disc and boom by the protrusion；Insulation sleeve is additionally provided with the compatible groove with protrusion, so that being formed in the mutually embedding clamping structure of axial upper convex-concave between two neighboring insulation sleeve.Spacing pad is equipped in the groove of insulation sleeve, so that resistor disc is loosely mounted between two neighboring insulation sleeve in the axial direction, i.e. there is no by two neighboring insulation sleeve rigid grasp for the two sides of resistor disc, in an assembling process, insulator will not apply extruding force to resistor disc, therefore can be avoided crushing insulator.In use, even if resistor disc fever expansion, there are deformation spaces for the two sides of resistor disc, will not crack insulator.
Description
Technical field
The utility model relates to resistor technologies fields, and in particular to a kind of heat expansion-proof rupture resistor.
Background technique
Crowbar resistor is mainly used in the low voltage crossing technology of wind power generation inverter.It sends out used in wind-force
Rotor side, for bypassing rotor-side converter, when power grid occur low-voltage disturbance when, prevent DC bus-bar voltage it is excessively high and
Rotor current is excessive.In the operating condition, Crowbar resistor can instantaneously dissipate huge energy.Wind energy is as a kind of
Clean renewable energy, the increasingly attention by countries in the world, wind electric converter can optimize the fortune of wind generator system
Row realizes the variable speed constant frequency generator in wide wind speed range, improves the working condition of fan efficiency and chain, reduces generator damage
Consumption improves operational efficiency, promotes wind energy utilization, and wind time-dependent current device adapts to energy because of its excellent control performance and good power grid
Power and be widely used.
As shown in Figure 1, the structure of Crowbar resistor generally comprises multiple resistor discs 11 arranged side by side and for more at present
Two mica booms 12 that a resistor disc 11 strings together, the end of multi-disc resistor disc 11 are successively welded and fixed and realize series connection, cloud
The string of letter string bar 12 has multiple insulators 13, and insulator 13 is for making to insulate between two neighboring resistor disc 11.The both ends of mica boom 12
Nut 14 is cased with to apply towards axial clamping force, to clamp resistor disc 11 insulator 13.
Insulator 13 is the standard component that cannot change of size, and two neighboring insulator 13 clamps resistor disc 11, resistor disc 11 with
Rigid contact between insulator 13, in an assembling process, nut 14 are excessive to the clamping force of insulator 13, lead to insulator 13 and resistor disc
Extruding force between 11 is excessive, crushing insulator 13.In use, the meeting of resistor disc 11 fever expansion, causes to crack insulator 13.
Summary of the invention
For the prior art there are above-mentioned technical problem, the utility model provides a kind of heat expansion-proof rupture resistor, energy
Enough prevent insulator from damaging.
To achieve the above object, the utility model the following technical schemes are provided:
A kind of heat expansion-proof rupture resistor is provided, is stringed together including muti-piece resistor disc arranged side by side and muti-piece resistor disc
Boom, boom string have multiple insulation sleeves for the electrical isolation between adjacent two pieces of resistor discs；Insulation sleeve is extended axially by protrusion,
Resistor disc cover outside protrusion so that being separated between resistor disc and boom by the protrusion；Insulation sleeve is additionally provided with and raised phase
The groove of adaptation, so that being formed in the mutually embedding clamping structure of axial upper convex-concave between two neighboring insulation sleeve；In the groove
Equipped with spacing pad, the protrusion of insulation sleeve resists the spacing pad after being embedded in the groove of adjacent insulation sleeve, so that resistor disc exists
It is loosely mounted between two neighboring insulation sleeve in axial direction.
Wherein, spacing pad is mica ring, and mica ring set is outside boom.
Wherein, spacing pad is elastic cushion.
Wherein, the insulation sleeve is insulator.
Wherein, boom includes screw rod and the mica layer for being coated on screw rod outer surface.
The utility model has the beneficial effects that
A kind of heat expansion-proof of the utility model ruptures resistor, due to being equipped with spacing pad, insulation in the groove of insulation sleeve
The protrusion of set resists the spacing pad after being embedded in the groove of adjacent insulation sleeve, so that resistor disc is loosely installed in the axial direction
Between two neighboring insulation sleeve, i.e., the two sides of resistor disc were being assembled there is no by two neighboring insulation sleeve rigid grasp
Cheng Zhong, insulator will not apply extruding force to resistor disc, therefore can be avoided crushing insulator.In use, even if resistor disc
Fever expansion, there are deformation spaces for the two sides of resistor disc, will not crack insulator.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the Crowbar resistor of the prior art.
Fig. 2 is the matching relationship schematic diagram between all parts of the resistor in embodiment.
Fig. 1 appended drawing reference:
Resistor disc 11, mica boom 12, insulator 13, nut 14.
Fig. 2 appended drawing reference:
Resistor disc 1, boom 2, insulator 3, raised 31, groove 32, spacing pad 4.
Specific embodiment
The utility model is described in detail below in conjunction with specific embodiments and drawings.
Fig. 2 shows the matching relationship between the adjacent insulator 3 of the resistor of the present embodiment, between insulator 3 and boom 2,
The boom 2 for illustrating only two pieces of resistor discs 1 arranged side by side in Fig. 2 and two pieces of resistor discs 1 being stringed together, two insulators 3 are by adjacent two
The electrical isolation of block resistor disc 1 separates.Insulator 3 is extended axially by protrusion 31, and 1 set of resistor disc outer so that resistor disc in protrusion 31
It is separated between 1 and boom 2 by described raised 31；Insulator 3 be additionally provided with raised 31 compatible grooves 32 so that adjacent two
The mutually embedding clamping structure of axial upper convex-concave is formed between a insulator 3.Spacing pad 4, the protrusion of insulator 3 are equipped in the groove 32
The spacing pad 4 is resisted after the groove 32 of the adjacent insulator 3 of 31 insertions, so that resistor disc 1 is loosely mounted in the axial direction
Between two neighboring insulator 3, i.e., the two sides of resistor disc 1 are not by two neighboring 3 rigid grasp of insulator, in assembling process
In, resistor disc 1 will not apply extruding force to insulator 3, therefore can be avoided crushing insulator 3.Because there are changes for the two sides of resistor disc 1
Shape space, in use, even if 1 fever expansion of resistor disc, will not cause resistor disc 1 to crack insulator 3.
In the present embodiment, spacing pad 4 is mica ring, and for mica ring set outside boom 2, the insulation resistance of mica ring can be good.
There are many thickness specifications for spacing pad 4, according to the thickness of resistor disc 1, the spacing pad 4 of the corresponding thickness of selection, to ensure that resistor disc 1 exists
It is loosely mounted in axial direction between two neighboring insulator 3, the two sides of resistor disc 1 are not pressed from both sides by two neighboring 3 rigidity of insulator
Tightly.
In the present embodiment, spacing pad 4 is elastic cushion, accordingly even when the thermal expansion of resistor disc 1 thickens to resisting insulator 3, insulator 3
Spacing pad 4 can be compressed and continue adaptability displacement, ensure that resistor disc 1 will not apply excessive extruding force to insulator 3.
In practice, insulator 3 is readily modified as the insulation sleeve of other materials such as mica.
In the present embodiment, boom 2 includes screw rod and the mica layer for being coated on screw rod outer surface.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (5)
1. a kind of heat expansion-proof ruptures resistor, it is characterized in that: including muti-piece resistor disc arranged side by side and muti-piece resistor disc is strung
The boom come, boom string have multiple insulation sleeves for the electrical isolation between adjacent two pieces of resistor discs；Insulation sleeve is extended axially by
Protrusion, resistor disc cover outside protrusion so that being separated between resistor disc and boom by the protrusion；Insulation sleeve be additionally provided with
The compatible groove of protrusion, so that being formed in the mutually embedding clamping structure of axial upper convex-concave between two neighboring insulation sleeve；It is described
Spacing pad is equipped in groove, the protrusion of insulation sleeve resists the spacing pad after being embedded in the groove of adjacent insulation sleeve, so that electric
Resistance piece is loosely mounted between two neighboring insulation sleeve in the axial direction.
2. a kind of heat expansion-proof according to claim 1 ruptures resistor, it is characterized in that: spacing pad is mica ring, mica
Ring set is outside boom.
3. a kind of heat expansion-proof according to claim 1 ruptures resistor, it is characterized in that: spacing pad is elastic cushion.
4. a kind of heat expansion-proof according to claim 1 ruptures resistor, it is characterized in that: the insulation sleeve is insulator.
5. a kind of heat expansion-proof according to claim 1 ruptures resistor, it is characterized in that: boom includes screw rod and is coated on
The mica layer of screw rod outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822007061.7U CN209487273U (en) | 2018-11-30 | 2018-11-30 | A kind of heat expansion-proof rupture resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822007061.7U CN209487273U (en) | 2018-11-30 | 2018-11-30 | A kind of heat expansion-proof rupture resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209487273U true CN209487273U (en) | 2019-10-11 |
Family
ID=68117545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822007061.7U Active CN209487273U (en) | 2018-11-30 | 2018-11-30 | A kind of heat expansion-proof rupture resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209487273U (en) |
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2018
- 2018-11-30 CN CN201822007061.7U patent/CN209487273U/en active Active
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