CN202142960U - Special temperature sensor for large motor stator - Google Patents
Special temperature sensor for large motor stator Download PDFInfo
- Publication number
- CN202142960U CN202142960U CN201120196977U CN201120196977U CN202142960U CN 202142960 U CN202142960 U CN 202142960U CN 201120196977 U CN201120196977 U CN 201120196977U CN 201120196977 U CN201120196977 U CN 201120196977U CN 202142960 U CN202142960 U CN 202142960U
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- Prior art keywords
- temperature
- sensing element
- sensor
- heart yearn
- storage tank
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- Expired - Fee Related
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Abstract
The utility model relates to a temperature sensor, comprising an insulating shell, a temperature sensing element and a sensor electric cable; the temperature sensing element is placed in the innermost part of the housing slot of the insulating shell; a segment of core wire and a segment of shielding layer are exposed from the first end of the sensor electric cable; the temperature sensing element and the core wire are electrically connected; the temperature sensing element and the core wire are further sealed in the housing slot by a filled rubber; the segment of shielding layer and a segment of complete sensor electric cable are sealed in the housing slot by resin; the second end of the sensor electric cable is stretched out from the opening end of the housing slot. The temperature sensor of the utility model improves the thermal response time and seismic performance by adopting the closed-type suspending structure; simultaneously, an integrated shielding structure is formed to remove the interference of the electromagnetic field on the temperature measuring signal. Thus, the temperature sensor of the utility model can be especially used as the special temperature sensor for the large motor stator.
Description
Technical field
The utility model relates to sensor technology, more particularly, relates to a kind of temperature transducer.
Background technology
At present, large-size machine for example 300,000 kilowatts and above hydraulic generator and turbo generator in the course of the work, for the operating state of accurately grasping stator to guarantee the normal operation of unit, must online accurate observing and controlling stator winding and temperature unshakable in one's determination.Because existing stator core is embedded into formula when the stator-core lamination with temperature sensor, in case therefore the stator core temperature sensor fails promptly can't be changed.Stator winding buries with temperature sensor and is contained in stator bar interlayer and stator core bottom land, more needs during emat sensor whole line rod is disassembled, and whole stator winding can not dismantled in order to change the stator temperature transducer in general scene.Therefore, large-size machine stator thermometric was had higher requirement with the life-span of transducer.Large power plant requires the life-span of stator temperature transducer also longer than the life-span of stator, minimum more than 15 years.
At present the temperature sensor used of large-size machine stator thermometric most of adopt be based on the thermal resistance that platinum filament enwinding type temperature-sensing element is made; This kind product adopts the platinum filament about diameter 0.03mm to be wound on and is encapsulated on the insulation framework in the insulation shell, and platinum filament adopts soldering to weld with lead-in wire.The temperature transducer of this structure has that temperature measurement accuracy is low, poor seismic behavior, the long shortcomings such as (general time constant are about 30 seconds) of thermal response time.Poor seismic behavior shows the bigger vibration of generation in the generator operation process, and platinum filament is easy to generate stress with the insulation framework contact site and concentrates in long-term vibration processes, finally causes platinum filament fracture or turn-to-turn short circuit, makes the temperature transducer inefficacy.In addition, the thermal resistance rear end lead-in wire that platinum filament enwinding type temperature-sensing element is made generally is not with shielding, and the position that the band shielding is arranged also is just to begin the band shielding in the position of the later half rice of thermal resistance lead-in wire, and this structure is in the distortion that can cause temperature measurement signal in some cases.
The utility model content
The technical problem that the utility model will solve is; Above-mentioned temperature transducer poor seismic behavior, thermal response time to prior art is long, temperature measurement signal is subject to defectives such as interference; A kind of novel temperature transducer is provided, is particularly useful for large-size machine stator thermometric.
The utility model solves the technical scheme that its technical problem adopted: propose a kind of temperature transducer; Comprise insulation shell, temperature-sensing element and sensor cable; Said temperature-sensing element places the penetralia of the storage tank of insulation shell; First end of said sensor cable exposes one section heart yearn and one section screen; Said temperature-sensing element is electrically connected with said heart yearn and encapsulates said temperature-sensing element and said heart yearn in said storage tank through filling glue, and said one section screen and one section complete sensors cable are encapsulated in the said storage tank through sealing resin, and second end of said sensor cable is drawn from the openend of said storage tank.
In the said temperature transducer, said temperature-sensing element is a film platinum resistor.In the specific embodiment, said film platinum resistor is single or two film platinum resistors.
In the said temperature transducer, said temperature-sensing element is welded together to form with heart yearn and is electrically connected.
In the said temperature transducer, said temperature-sensing element and said heart yearn are contained in the said storage tank through the shockproof glue based water seal of heat conduction.
In the said temperature transducer, said sealing resin is an epoxy resin glue.
Implement the temperature transducer of the utility model, have following beneficial effect:
1, this temperature transducer adopts film platinum resistor, can increase substantially transducer useful life.
2, through Optimal Structure Designing, the transducer temperature-sensing element near the thermometric surface, is filled through Heat Conduction Material, increase substantially thermal response time, thermal response time can be accomplished less than 5 seconds.
3, can make the temperature transducer that franchise is the A level according to the utility model, improve on-the-spot certainty of measurement.
4, to adopt temperature resistant grade be the H level, have shock resistance preferably, the nonmetallic materials of antidetonation, high voltage withstanding, anticorona and antimagnetizing are as insulation shell, improves transducer long-time stability, reliability and make the transducer can be at reliability service steady in a long-term below 180 ℃.
5, the closed suspension structure of the inner employing of insulation shell adopts the shockproof filling glue of heat conduction that the sensor electrical core of RTD element and welding with it is encapsulated in insulation shell inside, realizes the high anti-seismic performance of transducer.
6, adopt integrated shielding construction, can in the large-size machine alternating magnetic field, eliminate the interference of electromagnetic field the temperature measurement signal of temperature transducer.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the structural representation of the temperature transducer of an embodiment of the utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, according to the temperature transducer 100 of an embodiment of the utility model mainly by insulation shell 10, temperature-sensing element 20, sensor cable 30, fill glue 40 and sealing resin 50 constitutes.First end of temperature-sensing element 20 and sensor cable 30 is electrically connected; And be encapsulated in the storage tanks 12 that form in the insulation shell 10 through filling glue 40, second end of sensor cable 30 is drawn and through sealing resin 50 itself and insulation shell 10 is packaged into a hermetically sealed reliable entity from the openend of insulation shell 10.
Specifically as shown in Figure 1, it is the H level that insulation shell 10 can adopt temperature resistant grade, have shock resistance preferably, antidetonation, nonmetallic materials high voltage withstanding, anticorona and antimagnetizing are processed.Insulation shell 10 vertically is formed with from openend along it and extends inwardly to the storage tank 12 near the opposite end, is used to encapsulate temperature-sensing element 20 and operative sensor cable 30.
The temperature-sensing element 20 of temperature transducer 100 can adopt single or two film platinum resistors.Because film platinum resistor has good mechanical performance (anti shock and vibration ability), long-term stability is good, volume is little, the pin platinum-nickel alloy is easy to characteristics such as welding, based thin film RTD and the temperature transducer processed can increase substantially useful life.Sensor cable 30 comprises heart yearn 32 and is wrapped in heart yearn 32 outside screen 34 and restrictive coating 36, and heart yearn 32 is optional to use and disuse the silver-plated heart yearn in cross section square, adopts three-wire system or four-wire system to realize accurate thermometric.Specifically as shown in Figure 1, sensor cable 30 is shelled becomes to expose one section heart yearn 32 and one section screen 34, and temperature-sensing element 20 is welded together to form with heart yearn 32 and is electrically connected.
Temperature-sensing element 20 places storage tank 12 penetralias of insulation shell 10.Filling glue 40 will weld good temperature-sensing element 20 and be encapsulated in the storage tank 12 with heart yearn 32, form closed suspension structure.Fill glue 40 and select the shockproof glue of heat conduction for use.This structural design is surperficial near thermometric with temperature-sensing element 20; Through leading shockproof glue based filling; Increase substantially thermal response time; Thermal response time can be less than 5 seconds, and adopted that heat conduction is shockproof glue based to be encapsulated in enclosure interior with temperature-sensing element 20 and heart yearn 32, realized the high anti-seismic performance of this temperature transducer.In addition; Exposing in one period of screen 34 and the complete one section storage tank 12 of also inserting insulation shell 10 subsequently of sensor cable 30; And be encapsulated in the storage tank 12 through sealing resin 50 (for example epoxy resin glue) the whole measuring temperature sensor is formed a totally-enclosed reliable entity; Thereby well eliminate the interference of electromagnetic field, and further strengthen its anti-seismic performance temperature measurement signal.
The manufacture process of temperature transducer 100 shown in Figure 1 is following: the screen 34 of sensor cable 30 is extremely as shown in Figure 1 with heart yearn 32 strippings, promptly expose one section heart yearn 32 and one section screen 34 simultaneously; Temperature-sensing element 20 (for example film platinum resistor) and heart yearn 32 are welded together; The temperature-sensing element assembly that welding is good is placed in the storage tank 12 of insulation shell 10; Storage tank 12 inner temperature elements 20 are encapsulated in the shockproof structure of filling formation sealing in the glue 40 with heart yearn 32; The storage tank 12 that 34 1 sections of screens and corresponding one section complete cable of sensor wire 30 placed insulation shell 10 is encapsulated in the temperature-sensing element of entire belt cable at last and forms hermetically sealed reliable entity in the insulation shell 10 with sealing resin.
Temperature transducer according to the utility model is encapsulated in insulation shell inside with the sensor electrical core of temperature-sensing element and welding with it through the shockproof filling glue of heat conduction through adopting closed suspension structure; Can improve thermal response time and anti-seismic performance; Through will also being encapsulated in insulation shell inside being integrally formed shielding construction, eliminate the interference of electromagnetic field simultaneously to temperature measurement signal with one section sensor cable of masked segment.Thereby the temperature transducer of the utility model is especially suitable for use as the special-purpose temperature transducer of large-size machine stator.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (6)
1. temperature transducer; It is characterized in that; Comprise insulation shell, temperature-sensing element and sensor cable; Said temperature-sensing element places the penetralia of the storage tank of insulation shell, and first end of said sensor cable exposes one section heart yearn and one section screen, and said temperature-sensing element is electrically connected with said heart yearn and encapsulates said temperature-sensing element and said heart yearn in said storage tank through filling glue; Said one section screen and one section complete sensors cable are encapsulated in the said storage tank through sealing resin, and second end of said sensor cable is drawn from the openend of said storage tank.
2. temperature transducer according to claim 1 is characterized in that, said temperature-sensing element is a film platinum resistor.
3. temperature transducer according to claim 2 is characterized in that, said film platinum resistor is single or two film platinum resistors.
4. temperature transducer according to claim 1 is characterized in that, said temperature-sensing element is welded together to form with heart yearn and is electrically connected.
5. temperature transducer according to claim 1 is characterized in that, said temperature-sensing element and said heart yearn are contained in the said storage tank through the shockproof glue based water seal of heat conduction.
6. temperature transducer according to claim 1 is characterized in that, said sealing resin is an epoxy resin glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120196977U CN202142960U (en) | 2011-06-13 | 2011-06-13 | Special temperature sensor for large motor stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120196977U CN202142960U (en) | 2011-06-13 | 2011-06-13 | Special temperature sensor for large motor stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142960U true CN202142960U (en) | 2012-02-08 |
Family
ID=45553998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120196977U Expired - Fee Related CN202142960U (en) | 2011-06-13 | 2011-06-13 | Special temperature sensor for large motor stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142960U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162853A (en) * | 2013-03-28 | 2013-06-19 | 天津市百利溢通电泵有限公司 | Device and method for detecting temperature of submersible motor stator winding |
| CN117232675A (en) * | 2023-11-13 | 2023-12-15 | 深圳市泰士特科技股份有限公司 | Generator stator temperature sensor and processing method thereof |
-
2011
- 2011-06-13 CN CN201120196977U patent/CN202142960U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162853A (en) * | 2013-03-28 | 2013-06-19 | 天津市百利溢通电泵有限公司 | Device and method for detecting temperature of submersible motor stator winding |
| CN117232675A (en) * | 2023-11-13 | 2023-12-15 | 深圳市泰士特科技股份有限公司 | Generator stator temperature sensor and processing method thereof |
| CN117232675B (en) * | 2023-11-13 | 2024-03-12 | 深圳市泰士特科技股份有限公司 | Generator stator temperature sensor and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20130613 |