CN104535216B - Multi-redundant metal framework platinum resistor temperature sensing element and manufacturing method thereof - Google Patents
Multi-redundant metal framework platinum resistor temperature sensing element and manufacturing method thereof Download PDFInfo
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- CN104535216B CN104535216B CN201410713810.1A CN201410713810A CN104535216B CN 104535216 B CN104535216 B CN 104535216B CN 201410713810 A CN201410713810 A CN 201410713810A CN 104535216 B CN104535216 B CN 104535216B
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Abstract
A multi-redundant metal framework platinum resistor temperature sensing element specifically comprises a hollow metal framework which is provided with an Al2O3 insulation coating. One end of the metal framework is trumpet-shaped, and the periphery of the other end is provided with a plurality of silver lug plates uniformly distributed along the circumferential direction. Each silver lug plate is connected with a lead-out wire, and the periphery of the silver lug plates is wound with an alkali-free glass fiber rope. The metal framework is wound with a platinum wire. The periphery of the platinum wire and the alkali-free glass fiber rope is coated with a high-temperature-resistant insulation sealing coating. A manufacturing method comprises the following steps: a metal framework stamping step, a surface cleaning step, an Al2O3 insulation coating applying step, a platinum wire winding step, a debugging and spot-welding step, a binding step, and a sealing step. By applying air and fuel-lubricating oil temperature sensors assembled by the temperature sensing element of the invention, as a measured medium can flow through the inner and outer surfaces of the metal framework, the conduction area of the medium is increased greatly. Because the framework adopts a metal pipe structure, the thermal conduction coefficient is increased, the conduction thickness is decreased, and the sensor time constant is increased greatly.
Description
Technical field
The present invention relates to a kind of redundance metallic framework platinum resistance temperature-sensing element, more particularly to a kind of redundance metallic framework
Platinum resistance temperature-sensing element and preparation method thereof, belongs to the technical field of temperature-sensing element.
Background technology
Thermal resistance temperature sensor is because its temperature measurement accuracy is high, long-time stability are widely used in measurement aeroplane engine the features such as good
The Region Medium temperature such as machine combustion lubricating oil, fan inlet, compressor inlet.The temperature-sensing element bag of traditional thermal resistance temperature sensor
Include：Mica frame externally-wound type platinum resistance, ceramic skeleton externally-wound type platinum resistance, ceramic skeleton film platinum resistor, glass skeleton it is outer around
Formula platinum resistance, these platinum resistance are using high nonmetallic materials of dielectric strength such as Muscovitum, ceramics and glass as platinum filament temperature-sensitive
Material coiling skeleton, efficiently solves sensor insulative dielectric index request, but because nonmetallic framework material has heat conduction system
Number is big, be difficult the low feature of machining, structural strength so that the response time and structural reliability of sensor cannot be carried significantly
Rise.And as China's aero-engine promotes ratio, high reliability direction to develop towards big, traditional platinum resistance temperature sensor is difficult
In meeting airborne sensor high reliability, high performance requirement.
The content of the invention
It is an object of the invention to solve above-mentioned technical problem, a kind of redundance metallic framework platinum resistance temperature-sensitive unit is proposed
Part and preparation method thereof.
First purpose of the present invention, a kind of redundance metallic framework platinum resistance temperature-sensing element, especially, including one hollow
Metallic framework, the periphery of the metallic framework is coated with Al2O3Insulating coating, described metallic framework one end is another in horn-like
End periphery has the circumferential silvery lug plate being uniformly arranged of plural number, and the silvery lug plate is connected with extraction wire and its periphery
There is alkali-free glass fibre rope around the home, it is described around the platinum filament that is connected with silvery lug plate is equipped between the two ends of the metallic framework
Platinum filament, the periphery of alkali-free glass fibre are coated with high-temperature insulation seal coat.
Second object of the present invention, a kind of manufacture method of redundance metallic framework platinum resistance temperature-sensing element, its feature
It is to comprise the following steps：
A. metallic framework punch steps, metallic framework one end are struck out horn-like；
B. removing surface step, to the periphery of metallic framework oxide layer process is carried out；
c. Al2O3Insulating coating coating step, by Al2O3Insulating coating is coated in metal by High Temperature High Pressure spraying method
Skeleton periphery；
D. platinum filament step around the home, platinum filament selects Double-wire parallel wound or the mode of parallel winding of multiple coils to wind according to the remaining of temperature-sensing element
Al between metallic framework two ends2O3Insulating coating surface；
E. spot welding step is debugged, Precision adjustment will be carried out after the exit of platinum filament and the fixation of silvery lug plate, it is qualified to debug
Platinum filament is fixed with silvery lug plate spot welding afterwards；
F. step of ligation, by silvery lug plate metallic framework other end outside is evenly distributed on, and uses alkali-free glass fibre rope
Silvery lug plate colligation is fixed；
G. step is closed, in platinum filament and one layer of high-temperature insulation seal coat of periphery spraying of alkali-free glass fibre rope.
Preferably, metallic framework is the metallic framework of expansion alloy tubing in step a.
The beneficial effects are mainly as follows：Using the air-flow and combustion oil temperature of this kind of structure temperature-sensing element assembling
Sensor, because measured medium can flow through from metallic framework surfaces externally and internally, largely increased medium conduction surface, while
Skeleton adopts metal pipe material structure, heat conductivity increase, conduction thickness to diminish, and detector time constant is substantially improved.
Description of the drawings
Fig. 1 is a kind of structural representation of redundance metallic framework platinum resistance temperature-sensing element of the invention.
Specific embodiment
A kind of redundance metallic framework platinum resistance temperature-sensing element, as shown in figure 1, including a hollow metallic framework 1, metal
The periphery of skeleton 1 is coated with Al2O3Insulating coating 2, one end of metallic framework 1 is in horn-like, and other end periphery has plural number circumferential equal
The silvery lug plate 6 of even setting, silvery lug plate 6 is connected with extraction wire 7 and there is around the home alkali-free glass fibre rope its periphery
5, around being equipped with the platinum filament 3 that is connected with silvery lug plate 6, platinum filament 3, the periphery of alkali-free glass fibre 5 between the two ends of metallic framework 1
It is coated with high-temperature insulation seal coat 4.
The manufacture method that the following is a kind of redundance metallic framework platinum resistance temperature-sensing element of the invention, specifically includes following step
Suddenly：
A. metallic framework punch steps, metallic framework one end are struck out horn-like；
B. removing surface step, to the periphery of metallic framework oxide layer process is carried out；
c. Al2O3Insulating coating coating step, by Al2O3Insulating coating is coated in metal by High Temperature High Pressure spraying method
Skeleton periphery；
D. platinum filament step around the home, platinum filament selects Double-wire parallel wound or the mode of parallel winding of multiple coils to wind according to the remaining of temperature-sensing element
Al between metallic framework two ends2O3Insulating coating surface；
E. spot welding step is debugged, Precision adjustment will be carried out after the exit of platinum filament and the fixation of silvery lug plate, it is qualified to debug
Platinum filament is fixed with silvery lug plate spot welding afterwards；
F. step of ligation, by silvery lug plate metallic framework other end outside is evenly distributed on, and uses alkali-free glass fibre rope
Silvery lug plate colligation is fixed；
G. step is closed, in platinum filament and one layer of high-temperature insulation seal coat of periphery spraying of alkali-free glass fibre rope.
Wherein, metallic framework is the metallic framework of expansion alloy tubing in step a, specifically, is selected and glass swelling system
The glass sealing alloy tubing of number matching, heat conductivity increases, thickness diminishes, detector time constant is substantially improved for conduction.
Using the air-flow and combustion oil temperature sensor of this kind of structure temperature-sensing element assembling, because measured medium can be from metal
Skeleton surfaces externally and internally flows through, and largely increased medium conduction surface, while skeleton adopts metal pipe material structure, heat conduction system
Number increase, conduction thickness diminish, and detector time constant is substantially improved, and on the other hand, sensor has passed through reliability intensifying examination
Test, identify qualification test and outfield test run checking, performance indications fully meet engine calls, at present such temperature-sensing element structure
In order, there is not any failure in sensor line.Temperature-sensing element performance meets claimed below：Temperature-measuring range：-70℃
～300 DEG C；Indexing：The various indexing such as Pt100；Precision：A levels；Insulation resistance：100MΩ（500VDC）；Operating current：≤5mA;
Time constant：1.5s（Current 0.4m/s）；Resistance to grade of shaking：Not less than 50g.
All technical sides that the present invention still has numerous embodiments, all employing equivalents or an equivalent transformation and formed
Case, is within the scope of the present invention.
Claims (2)
1. a kind of manufacture method of redundance metallic framework platinum resistance temperature-sensing element, the redundance metallic framework platinum resistance temperature-sensitive
Element includes a hollow metallic framework, and the periphery of the metallic framework is coated with Al2O3Insulating coating, the metallic framework one
End is in horn-like, and other end periphery has the circumferential silvery lug plate being uniformly arranged of plural number, and the silvery lug plate is connected with and draws
Go out wire and there is around the home alkali-free glass fibre rope its periphery, around being equipped with and silvery lug plate between the two ends of the metallic framework
Connected platinum filament, the platinum filament, the periphery of alkali-free glass fibre are coated with high-temperature insulation seal coat,
It is characterized in that comprising the following steps：
A. metallic framework punch steps, metallic framework one end are struck out horn-like；
B. removing surface step, to the periphery of metallic framework oxide layer process is carried out；
c. Al2O3Insulating coating coating step, by Al2O3Insulating coating is coated in metallic framework by High Temperature High Pressure spraying method
Periphery；
D. platinum filament step around the home, platinum filament selects Double-wire parallel wound or the mode of parallel winding of multiple coils to be wound in gold according to the remaining of temperature-sensing element
Al between category skeleton two ends2O3Insulating coating surface；
E. debug spot welding step, Precision adjustment will be carried out after the fixation of the exit of platinum filament and silvery lug plate, debug it is qualified after will
Platinum filament is fixed with silvery lug plate spot welding；
F. step of ligation, by silvery lug plate metallic framework other end outside is evenly distributed on, with alkali-free glass fibre rope by silver
Lug plate colligation processed is fixed；
G. step is closed, in platinum filament and one layer of high-temperature insulation seal coat of periphery spraying of alkali-free glass fibre rope.
2. a kind of manufacture method of redundance metallic framework platinum resistance temperature-sensing element according to claim 1, its feature exists
In：Metallic framework is the metallic framework of expansion alloy tubing in step a.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410713810.1A CN104535216B (en) | 2014-12-02 | 2014-12-02 | Multi-redundant metal framework platinum resistor temperature sensing element and manufacturing method thereof |
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| CN201410713810.1A CN104535216B (en) | 2014-12-02 | 2014-12-02 | Multi-redundant metal framework platinum resistor temperature sensing element and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN104535216A CN104535216A (en) | 2015-04-22 |
| CN104535216B true CN104535216B (en) | 2017-05-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282910A (en) * | 2017-07-20 | 2019-01-29 | 成都凯天电子股份有限公司 | Dual redundant temperature sensor |
| CN108387323B (en) * | 2018-03-02 | 2024-06-07 | 成都凯天电子股份有限公司 | Triple backup temperature sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2047013U (en) * | 1989-05-29 | 1989-11-01 | 北京市海淀区东升测温元件厂 | Ceramic platinum resistance temp. surveying element |
| US4934831A (en) * | 1989-03-20 | 1990-06-19 | Claud S. Gordon Company | Temperature sensing device |
| CN1047733A (en) * | 1989-05-29 | 1990-12-12 | 北京市海淀区东升测温元件厂 | The manufacture method of ceramic platinum resistor temperature measuring element |
| CN201514292U (en) * | 2009-09-16 | 2010-06-23 | 四川泛华航空仪表电器厂 | Thermal resistance type temperature sensor |
| EP2700924A2 (en) * | 2012-08-20 | 2014-02-26 | Unison Industries LLC | High temperature resistive temperature detector for exhaust gas temperature measurement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003203802A (en) * | 2002-01-09 | 2003-07-18 | Ngk Insulators Ltd | Temperature-sensitive resistance element, its manufacturing method and thermal flow rate sensor |
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2014
- 2014-12-02 CN CN201410713810.1A patent/CN104535216B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934831A (en) * | 1989-03-20 | 1990-06-19 | Claud S. Gordon Company | Temperature sensing device |
| CN2047013U (en) * | 1989-05-29 | 1989-11-01 | 北京市海淀区东升测温元件厂 | Ceramic platinum resistance temp. surveying element |
| CN1047733A (en) * | 1989-05-29 | 1990-12-12 | 北京市海淀区东升测温元件厂 | The manufacture method of ceramic platinum resistor temperature measuring element |
| CN201514292U (en) * | 2009-09-16 | 2010-06-23 | 四川泛华航空仪表电器厂 | Thermal resistance type temperature sensor |
| EP2700924A2 (en) * | 2012-08-20 | 2014-02-26 | Unison Industries LLC | High temperature resistive temperature detector for exhaust gas temperature measurement |
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