CN104535216A - 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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- CN104535216A CN104535216A CN201410713810.1A CN201410713810A CN104535216A CN 104535216 A CN104535216 A CN 104535216A CN 201410713810 A CN201410713810 A CN 201410713810A CN 104535216 A CN104535216 A CN 104535216A
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- lug plate
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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, particularly relate to a kind of redundance metallic framework platinum resistance temperature-sensing element and preparation method thereof, belong to the technical field of temperature-sensing element.
Background technology
Thermal resistance temperature sensor measures the Region Medium temperature such as aeromotor combustion lubricating oil, fan inlet, compressor inlet because the features such as its temperature measurement accuracy is high, long-time stability are good are widely used in.The temperature-sensing element of traditional thermal resistance temperature sensor comprises: mica frame externally-wound type platinum resistance, ceramic skeleton externally-wound type platinum resistance, ceramic skeleton film platinum resistor, glass skeleton externally-wound type platinum resistance, these platinum resistance all adopt mica, pottery and the high nonmetallic materials of the dielectric strength such as glass are as platinum filament temperature sensing material coiling skeleton, efficiently solve sensor insulative dielectric index request, but due to nonmetal framework material, to there is coefficient of heat conductivity large, not easily machining, the features such as structural strength is low, the response time of sensor and structural reliability cannot significantly be promoted.And along with China's aeromotor is towards promoting greatly ratio, high reliability future development, traditional platinum resistance temperature sensor is difficult to meet airborne sensor high reliability, high performance requirement.
Summary of the invention
The object of the invention is to solve above-mentioned technical matters, propose a kind of redundance metallic framework platinum resistance temperature-sensing element and preparation method thereof.
First object of the present invention, a kind of redundance metallic framework platinum resistance temperature-sensing element, especially, comprise the metallic framework of a hollow, the periphery of described metallic framework is coated with Al
2o
3insulating coating, described metallic framework one end is horn-like, other end periphery has the silvery lug plate that plural number circumference is evenly arranged, described silvery lug plate is connected with extraction wire and its periphery has alkali-free glass fibre rope around the home, have the platinum filament be connected with silvery lug plate between the two ends of described metallic framework around the home, the periphery of described platinum filament, alkali-free glass fibre is coated with high-temperature insulation seal coat.
Second object of the present invention, a kind of method for making of redundance metallic framework platinum resistance temperature-sensing element, is characterized in that comprising the following steps:
A. metallic framework punch steps, strikes out horn-like by metallic framework one end;
B. removing surface step, carries out oxide layer process to the periphery of metallic framework;
C. Al
2o
3insulating coating coating step, by Al
2o
3insulating coating is coated in metallic framework periphery by High Temperature High Pressure spraying method;
D. platinum filament step around the home, platinum filament is wound in the Al between metallic framework two ends according to the remaining selection Double-wire parallel wound of temperature-sensing element or the mode of parallel winding of multiple coils
2o
3insulating coating surface;
E. debug spot welding step, after the exit of platinum filament and silvery lug plate is fixing, carry out Precision adjustment, debug qualified after platinum filament and the spot welding of silvery lug plate are fixed;
F. step of ligation, is evenly distributed on silvery lug plate outside the metallic framework other end, the colligation of silvery lug plate is fixed with alkali-free glass fibre rope;
G. close step, spray one deck high-temperature insulation seal coat in the periphery of platinum filament and alkali-free glass fibre rope.
Preferably, in described step a, metallic framework is the metallic framework of expansion alloy tubing.
Beneficial effect of the present invention is mainly reflected in: the air-flow and the combustion oil temperature sensor that adopt this kind of structure temperature-sensing element assembling, because measured medium can flow through from metallic framework surfaces externally and internally, add medium conduction surface largely, skeleton adopts metal pipe material structure simultaneously, coefficient of heat conductivity increases, conduction less thick, and detector time constant significantly promotes.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of redundance metallic framework of the present invention platinum resistance temperature-sensing element.
Embodiment
A kind of redundance metallic framework platinum resistance temperature-sensing element, as shown in Figure 1, comprise the metallic framework 1 of a hollow, the periphery of metallic framework 1 is coated with Al
2o
3insulating coating 2, metallic framework 1 one end is horn-like, other end periphery has the silvery lug plate 6 that plural number circumference is evenly arranged, silvery lug plate 6 is connected with extraction wire 7 and its periphery has alkali-free glass fibre rope 5 around the home, have the platinum filament 3 be connected with silvery lug plate 6 between the two ends of metallic framework 1 around the home, the periphery of platinum filament 3, alkali-free glass fibre 5 is coated with high-temperature insulation seal coat 4.
Be below the method for making of a kind of redundance metallic framework of the present invention platinum resistance temperature-sensing element, specifically comprise the following steps:
A. metallic framework punch steps, strikes out horn-like by metallic framework one end;
B. removing surface step, carries out oxide layer process to the periphery of metallic framework;
C. Al
2o
3insulating coating coating step, by Al
2o
3insulating coating is coated in metallic framework periphery by High Temperature High Pressure spraying method;
D. platinum filament step around the home, platinum filament is wound in the Al between metallic framework two ends according to the remaining selection Double-wire parallel wound of temperature-sensing element or the mode of parallel winding of multiple coils
2o
3insulating coating surface;
E. debug spot welding step, after the exit of platinum filament and silvery lug plate is fixing, carry out Precision adjustment, debug qualified after platinum filament and the spot welding of silvery lug plate are fixed;
F. step of ligation, is evenly distributed on silvery lug plate outside the metallic framework other end, the colligation of silvery lug plate is fixed with alkali-free glass fibre rope;
G. close step, spray one deck high-temperature insulation seal coat in the periphery of platinum filament and alkali-free glass fibre rope.
Wherein, in step a, metallic framework is the metallic framework of expansion alloy tubing, concrete, selects the glass sealing alloy tubing mated with glass expansion coefficient, and coefficient of heat conductivity increases, conduction less thick, detector time constant significantly promote.
Adopt air-flow and the combustion oil temperature sensor of this kind of structure temperature-sensing element assembling, because measured medium can flow through from metallic framework surfaces externally and internally, add medium conduction surface largely, skeleton adopts metal pipe material structure simultaneously, coefficient of heat conductivity increases, conduction less thick, detector time constant significantly promotes, on the other hand, sensor have passed Reliability Enhancement Testing, qualification qualification test and outfield test run checking, performance index meet engine calls completely, such temperature-sensing element structure sensor line in order at present, there is not any fault.Temperature-sensing element performance meets following requirement: temperature-measuring range :-70 DEG C ~ 300 DEG C; Various calibration such as calibration: Pt100 etc.; Precision: A level; Insulation resistance: 100M Ω (500VDC); Working current :≤5mA; Time constant: 1.5s(current 0.4m/s); Resistance to grade of shaking: be not less than 50g.
The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes formed, and all drops within protection scope of the present invention.
Claims (3)
1. a redundance metallic framework platinum resistance temperature-sensing element, it is characterized in that: the metallic framework comprising a hollow, the periphery of described metallic framework is coated with Al
2o
3insulating coating, described metallic framework one end is horn-like, other end periphery has the silvery lug plate that plural number circumference is evenly arranged, described silvery lug plate is connected with extraction wire and its periphery has alkali-free glass fibre rope around the home, have the platinum filament be connected with silvery lug plate between the two ends of described metallic framework around the home, the periphery of described platinum filament, alkali-free glass fibre is coated with high-temperature insulation seal coat.
2. a method for making for a kind of redundance metallic framework platinum resistance temperature-sensing element as claimed in claim 1, is characterized in that comprising the following steps:
A. metallic framework punch steps, strikes out horn-like by metallic framework one end;
B. removing surface step, carries out oxide layer process to the periphery of metallic framework;
C. Al
2o
3insulating coating coating step, by Al
2o
3insulating coating is coated in metallic framework periphery by High Temperature High Pressure spraying method;
D. platinum filament step around the home, platinum filament is wound in the Al between metallic framework two ends according to the remaining selection Double-wire parallel wound of temperature-sensing element or the mode of parallel winding of multiple coils
2o
3insulating coating surface;
E. debug spot welding step, after the exit of platinum filament and silvery lug plate is fixing, carry out Precision adjustment, debug qualified after platinum filament and the spot welding of silvery lug plate are fixed;
F. step of ligation, is evenly distributed on silvery lug plate outside the metallic framework other end, the colligation of silvery lug plate is fixed with alkali-free glass fibre rope;
G. close step, spray one deck high-temperature insulation seal coat in the periphery of platinum filament and alkali-free glass fibre rope.
3. the method for making of a kind of redundance metallic framework platinum resistance temperature-sensing element according to claim 2, is characterized in that: in described step a, metallic framework is the metallic framework of expansion alloy tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713810.1A CN104535216B (en) | 2014-12-02 | 2014-12-02 | Multi-redundant metal framework platinum resistor temperature sensing element and manufacturing method thereof |
Publications (2)
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| CN104535216A true CN104535216A (en) | 2015-04-22 |
| CN104535216B CN104535216B (en) | 2017-05-03 |
Family
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| CN201410713810.1A Active 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387323A (en) * | 2018-03-02 | 2018-08-10 | 成都凯天电子股份有限公司 | Triple backup temperature transducers |
| CN109282910A (en) * | 2017-07-20 | 2019-01-29 | 成都凯天电子股份有限公司 | Double redundancy temperature-sensing element (device) |
Citations (6)
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|---|---|---|---|---|
| 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 |
| JP2003203802A (en) * | 2002-01-09 | 2003-07-18 | Ngk Insulators Ltd | Temperature-sensitive resistance element, its manufacturing method and thermal flow rate sensor |
| 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 |
-
2014
- 2014-12-02 CN CN201410713810.1A patent/CN104535216B/en active Active
Patent Citations (6)
| 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 |
| JP2003203802A (en) * | 2002-01-09 | 2003-07-18 | Ngk Insulators Ltd | Temperature-sensitive resistance element, its manufacturing method and thermal flow rate sensor |
| 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 |
Cited By (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 | Double redundancy temperature-sensing element (device) |
| CN108387323A (en) * | 2018-03-02 | 2018-08-10 | 成都凯天电子股份有限公司 | Triple backup temperature transducers |
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| Publication number | Publication date |
|---|---|
| CN104535216B (en) | 2017-05-03 |
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