CN203837834U - Combined thermocouple based total temperature sensor with high frequency response - Google Patents
Combined thermocouple based total temperature sensor with high frequency response Download PDFInfo
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- CN203837834U CN203837834U CN201420226775.6U CN201420226775U CN203837834U CN 203837834 U CN203837834 U CN 203837834U CN 201420226775 U CN201420226775 U CN 201420226775U CN 203837834 U CN203837834 U CN 203837834U
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Abstract
The utility model discloses a combined thermocouple based total temperature sensor with high frequency response, wherein the total temperature sensor is high dynamic temperature measuring accuracy, short in testing period, low in cost and convenient for testing. A stagnation cover structure is used to reduce the speed of inflow, thermoelectric signals output by thermocouples of different diameters and the same material are used to compensate dynamic and radiation errors, and the measuring precision is improved. The change of dynamic temperature can be accurately measured, and the total temperature sensor mainly aims at measuring temperature of high-speed dynamic environments with temperature distortion and the like of aviation compressor inlets.
Description
Technical field
The utility model relates to a kind of total temperature sensor of high frequency response based on combination thermopair, belongs to sensor technical field.
Background technology
Thermopair is contact temperature-measuring means the most conventional in current commercial production and scientific research, and it has the features such as measuring accuracy is higher and easy to use.But because contact temperature-measuring exists the restriction of thermal inertia, be difficult to overcome the error producing in kinetic measurement.1) if the temperature variation frequency of current China aero-engine compressor is greatly between 170 Hz and 1020 Hz, require the time constant of thermopair within the scope of 1 ms～6 ms, could accurately measure the dynamic temperature of pneumatic plant, the time constant of the thermopair using in commercial production at present generally can only reach a second level; 2) thermo wires diameter is that the constant of the filament thermopair time of 0.08 about mm can reach a few tens of milliseconds the soonest, but very easily damages, thereby the requirement of time constant all can not meet pneumatic plant thermometric time.
In the measurement of the temperature of aero-engine compressor, conventionally without stagnation structure, measure flow at high speed air-flow stagnation temperature and have difficulties, the temperature of dynamic fluctuation is often present in swiftly flowing air-flow, the thermocouple measurement velocity error that larger speed can cause, the precision that impact is measured.From the foreign study person combination thermocouple temperature measurement method that the begins one's study fifties in last century, on the basis that the domestic researcher of beginning the eighties studies abroad, sum up unique combination electric thermo-couple temperature calculating method according to electric thermo-couple temperature measured value.Although experienced the development of many decades, combination thermocouple thermometry also only limits to the delivery temperature of internal combustion engine in industrial application.To the research of combination thermopair experimental provision, generally cluster thermo wires was placed directly in dynamic temperature field in the past, cannot meet the multimetering requirement in commercial production, have that measuring speed error is large, thermopair is fragile and the problem such as the difficult maintenance of measuring equipment.
Utility model content
The purpose of this utility model is that the accuracy of the measured value that a kind of dynamic temperature is provided is high, the test period is short, cost-saving, be convenient to experiment work, the total temperature sensor of high frequency response based on combination thermopair.
The purpose of this utility model is achieved through the following technical solutions: a kind of total temperature sensor of high frequency response based on combination thermopair, comprise stagnation cover, fixed part and semicylinder long pole, described stagnation cover comprises the import of stagnation cover, stagnation chamber, the outlet of stagnation cover, square groove connecting hole, the 2nd groove, thermo wires through hole and thermopair thermo wires, described stagnation cover import is arranged on the axial direction of stagnation cover one end, described square groove connecting hole is arranged on the sidewall of the stagnation cover other end, described stagnation cover outlet is arranged on the sidewall of stagnation cover, described stagnation cover inside is provided with stagnation chamber, the 2nd described groove is corresponding being arranged on the sidewall of stagnation cover between two, described thermo wires through hole is arranged on one end of the 2nd groove, described thermopair thermo wires 21 is arranged in the 2nd groove, thermopair thermo wires is penetrated by thermo wires through hole, pass from corresponding thermo wires through hole, thermo wires node is arranged in stagnation chamber, described fixed part comprises middle through hole, the 1st groove, fixed orifice and square groove, described fixed orifice is arranged on the two ends of fixed part between two, described middle through hole is arranged on the center of fixed part, size matches with stagnation cover external diameter, the 1st described groove is the two ends that are arranged on middle through hole of correspondence between two, described square groove is arranged on middle via bottoms, and described square groove and the center line of through hole are in line, described stagnation cover is fixedly connected with fixed part with square groove by square groove connecting hole through middle through hole, and described thermopair thermo wires stretches out the 2nd groove part and imbeds the 1st groove and be connected with compensating wire, described semicylinder long pole is provided with the 1st through hole and the 1st threaded hole, the 1st described threaded hole is corresponding with the fixed orifice that fixed part two ends arrange, the 1st described through hole is corresponding with the middle through hole of fixed part, and described fixed part is fixedly installed on semicylinder long pole by the 1st through hole and the 1st threaded hole.
Also comprise semicircle thin-wall long pipe part, described semicylinder long pole is provided with the 2nd threaded hole, described semicircle thin-wall long pipe part setting and the correspondence position of the 2nd threaded hole are provided with the 2nd through hole, and the 2nd described threaded hole and the 2nd described through hole are bolted to connection.
Also comprise movable whorl web member, described semicylinder long pole is fixedly connected with by movable whorl web member with semicircle thin-wall long pipe part.
The 1st described groove and the 2nd groove at least 3 groups.
Described fixed part and stagnation cover are at least provided with 1 group.
Described stagnation cover import inside edge is provided with chamfering.
The described thermopair thermo wires being arranged in the 2nd groove uses insulating gel to cover.
The described thermopair thermo wires being connected with compensating wire uses conducting resinl to be connected and fixed.
In sum, the beneficial effects of the utility model are:
1) longitudinal stagnation cover, effectively reduces high velocity air and plays the effect of protecting thermopair thermo wires.By thermopair thermo wires, through thermo wires through hole, thermocouple junction is stayed in stagnation cover, imbeds in stagnation cover outer wall groove, and use insulating gel closed pockets by staying outside thermopair thermo wires.Stagnation cover use insulation, the stupalith that high temperature resistant, mechanical property is good.Rule of thumb adjust each several part size, and by FLUENT simplation examination stagnation effect.
2) carry out multimetering, measurement point spacing determines by the 1st lead to the hole site in semicylinder long pole, thereby can determine that the length of rod member and big hole spacing adapt to the requirement of varying environment according to different size of engine.
3) stagnation cover is connected with semicylinder long pole screw by fixed part, and limits stagnation cover and rotate.This apparatus structure is simple, when thermopair damages, can directly change stagnation cover.
4) thermopair thermo wires is arranged along airflow direction, effectively reduces stagnation cover radial dimension.
5) tie point of thermopair thermo wires and compensating wire is in the 1st groove of fixed part, reinforces with conducting resinl.Fixed part adopts stupalith, guarantees to insulate between thermopair and compensating wire, and be convenient to clear up the residuals in groove in the time changing stagnation cover.
6) fixing rear outside of deivce face is cylindrical, can reduce the impact on flow field after test unit; Make compensating wire and flow field isolation, protection compensating wire.
This device has solved the common problem that combination thermopair exists at present, can greatly reduce the test period, cost-saving, is convenient to the carrying out of experiment work.Can promote to test is the relevant aviation field technical development on basis.Also can, by the utility model application of installation in other dynamic temperature environment, improve the accuracy of the measured value of dynamic temperature.
Brief description of the drawings
Fig. 1 is the structural representation of utility model;
Fig. 2 is the structural representation of stagnation cover part;
Fig. 3 is the structural representation of fixed part part;
Fig. 4 is the structural representation after stagnation cover, fixed part and semicylinder long pole are connected and fixed;
Fig. 5 is the cross-sectional structure schematic diagram of stagnation cover.
The title of mark in accompanying drawing: 1, stagnation cover import, 2, chamfering, 3, stagnation chamber, 4, the outlet of stagnation cover,
5, square groove connecting hole, the 6, the 2nd groove, 7, thermo wires through hole, 8, middle through hole,
9, the 1st groove, 10, square groove, 11, fixed orifice, the 12, the 2nd threaded hole,
13, the 1st through hole, the 14, the 1st threaded hole, the 15, the 2nd through hole, 16, stagnation cover,
17, fixed part, 18, semicylinder long pole, 19, semicircle thin-wall long pipe part,
20, movable whorl web member, 21, thermopair thermo wires, 22, thermo wires node.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited only to this.
Embodiment: as shown in Figures 1 to 5, the utility model comprises stagnation cover 16, fixed part 17 and semicylinder long pole 18, described stagnation cover 16 comprises stagnation cover import 1, stagnation chamber 3, stagnation cover outlet 4, square groove connecting hole 5, the 2nd groove 6, thermo wires through hole 7 and thermopair thermo wires 21, and the 2nd described groove 6 adopts 3 groups.Described fixed part 17 and stagnation cover 16 adopt 1 group, and every group of spacing can be determined according to concrete test condition.Semicylinder long pole 18 is for connecting entire length and the measurement point spacing of stagnation cover determination device.Described stagnation cover import 1 is arranged on the axial direction of stagnation cover 16 one end, described square groove connecting hole 5 is arranged on the sidewall of stagnation cover 16 other ends, described stagnation cover outlet 4 is arranged on the sidewall of stagnation cover 16, described stagnation cover 16 inside are provided with stagnation chamber 3, the 2nd described groove 6 is corresponding being arranged on the sidewall of stagnation cover 16 between two, described thermo wires through hole 7 is arranged on one end of the 2nd groove 6, described thermopair thermo wires 21 is arranged in the 2nd groove 6, thermopair thermo wires 21 is penetrated by thermo wires through hole 7, pass from corresponding thermo wires through hole 7, thermo wires node 22 is arranged in stagnation chamber 3, should make the thermo wires node 22 of every thermopair thermo wires 21 not be positioned at stagnation chamber 3 centers, and make 3 thermo wires nodes 22 be evenly distributed in stagnation chamber 3 inside.Described stagnation cover import 1 inside edge is provided with chamfering 2, for promoting the insensitivity to airflow direction.The described thermopair thermo wires 21 being arranged in the 2nd groove 6 uses insulating gel to cover, for the protection of, stationary heat galvanic couple thermo wires 21.Thermopair thermo wires 21 stretches out the about 10mm of the 2nd groove 6 to connect compensating wire; Described fixed part 17 comprises middle through hole the 8, the 1st groove 9, fixed orifice 11 and square groove 10, and the 1st described groove 9 adopts 3 groups.Described fixed orifice 11 is arranged on the two ends of fixed part 17 between two, described middle through hole 8 is arranged on the center of fixed part 17, size matches with stagnation cover 16 external diameters, the 1st described groove 9 is the two ends that are arranged on middle through hole 8 of correspondence between two, described square groove 10 is arranged on middle through hole 8 bottoms, and described square groove 10 and the center line of through hole 5 are in line; Described stagnation cover 16 is fixedly connected with fixed part 17 with square groove 10 by square groove connecting hole 5 through middle through hole 8, described thermopair thermo wires 21 stretches out the 2nd groove 6 parts to be imbedded the 1st groove 9 and is connected with compensating wire, and the described thermopair thermo wires 21 being connected with compensating wire uses conducting resinl to be connected and fixed; Described semicylinder long pole 18 is provided with the 1st through hole 13 and the 1st threaded hole 14, the 1st described threaded hole 14 is corresponding with the fixed orifice 11 that fixed part 17 two ends arrange, the 1st described through hole 13 is corresponding with the middle through hole 8 of fixed part 17, and described fixed part 17 is fixedly installed on semicylinder long pole 18 by the 1st through hole 13 and the 1st threaded hole 14.Fixed part 17, for insulation and the high stupalith of hardness, is guaranteed between thermopair and compensating wire to insulate, and is convenient to clear up the residuals in groove in the time changing stagnation cover.
Also comprise semicircle thin-wall long pipe part 19 and movable whorl web member 20, described semicylinder long pole 18 is provided with the 2nd threaded hole 12, described semicircle thin-wall long pipe part 19 arranges with the correspondence position of the 2nd threaded hole 12 and is provided with the 2nd through hole 15, and the 2nd described threaded hole 12 is bolted to connection with the 2nd described through hole 15.Described semicylinder long pole 18 is further fixed by movable whorl web member 20 with semicircle thin-wall long pipe part 19.After fixing, outside of deivce face is cylindrical, can reduce the impact on flow field after test unit; Make compensating wire and flow field isolation, protection compensating wire.
Above embodiment is only novel for this enforcement is described; but not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from spirit and scope of the present utility model; can also make a variety of changes and be out of shape; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (8)
1. the total temperature sensor of high frequency response based on combination thermopair, it is characterized in that: comprise stagnation cover (16), fixed part (17) and semicylinder long pole (18), described stagnation cover (16) comprises stagnation cover import (1), stagnation chamber (3), stagnation cover outlet (4), square groove connecting hole (5), the 2nd groove (6), thermo wires through hole (7) and thermopair thermo wires (21), described stagnation cover import (1) is arranged on the axial direction of stagnation cover (16) one end, described square groove connecting hole (5) is arranged on the sidewall of stagnation cover (16) other end, described stagnation cover outlet (4) is arranged on the sidewall of stagnation cover (16), described stagnation cover (16) inside is provided with stagnation chamber (3), the 2nd described groove (6) between two correspondence is arranged on the sidewall of stagnation cover (16), described thermo wires through hole (7) is arranged on one end of the 2nd groove (6), described thermopair thermo wires (21) is arranged in the 2nd groove (6), thermopair thermo wires (21) is penetrated by thermo wires through hole (7), pass from corresponding thermo wires through hole (7), thermo wires node (22) is arranged in stagnation chamber (3), described fixed part (17) comprises middle through hole (8), the 1st groove (9), fixed orifice (11) and square groove (10), described fixed orifice (11) is arranged on the two ends of fixed part (17) between two, described middle through hole (8) is arranged on the center of fixed part (17), size matches with stagnation cover (16) external diameter, the 1st described groove (9) is the two ends that are arranged on middle through hole (8) of correspondence between two, described square groove (10) is arranged on middle through hole (8) bottom, and described square groove (10) and the center line of through hole (5) are in line, described stagnation cover (16) is fixedly connected with fixed part (17) with square groove (10) by square groove connecting hole (5) through middle through hole (8), and described thermopair thermo wires (21) stretches out the 2nd groove (6) part and imbeds the 1st groove (9) and be connected with compensating wire, described semicylinder long pole (18) is provided with the 1st through hole (13) and the 1st threaded hole (14), the 1st described threaded hole (14) is corresponding with the fixed orifice (11) that fixed part (17) two ends arrange, the 1st described through hole (13) is corresponding with the middle through hole (8) of fixed part (17), and described fixed part (17) is fixedly installed on semicylinder long pole (18) by the 1st through hole (13) and the 1st threaded hole (14).
2. the total temperature sensor of high frequency response based on combination thermopair according to claim 1, it is characterized in that: also comprise semicircle thin-wall long pipe part (19), described semicylinder long pole (18) is provided with the 2nd threaded hole (12), described semicircle thin-wall long pipe part (19) arranges with the correspondence position of the 2nd threaded hole (12) and is provided with the 2nd through hole (15), and the 2nd described threaded hole (12) is bolted to connection with the 2nd described through hole (15).
3. the total temperature sensor of high frequency response based on combination thermopair according to claim 2, it is characterized in that: also comprise movable whorl web member (20), described semicylinder long pole (18) is fixedly connected with by movable whorl web member (20) with semicircle thin-wall long pipe part (19).
4. the total temperature sensor of high frequency response based on combination thermopair according to claim 2, is characterized in that: the 1st described groove (9) and the 2nd groove (6) at least 3 groups.
5. according to the total temperature sensor of high frequency response based on combination thermopair described in any 1 in claim 1 to 4, it is characterized in that: described fixed part (17) and stagnation cover (16) are at least provided with 1 group.
6. the total temperature sensor of high frequency response based on combination thermopair according to claim 5, is characterized in that: described stagnation cover import (1) inside edge is provided with chamfering (2).
7. the total temperature sensor of high frequency response based on combination thermopair according to claim 6, is characterized in that: the described thermopair thermo wires (21) being arranged in the 2nd groove (6) uses insulating gel to cover.
8. the total temperature sensor of high frequency response based on combination thermopair according to claim 7, is characterized in that: the described thermopair thermo wires (21) being connected with compensating wire uses conducting resinl to be connected and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226775.6U CN203837834U (en) | 2014-05-06 | 2014-05-06 | Combined thermocouple based total temperature sensor with high frequency response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226775.6U CN203837834U (en) | 2014-05-06 | 2014-05-06 | Combined thermocouple based total temperature sensor with high frequency response |
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| Publication Number | Publication Date |
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| CN203837834U true CN203837834U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420226775.6U Expired - Fee Related CN203837834U (en) | 2014-05-06 | 2014-05-06 | Combined thermocouple based total temperature sensor with high frequency response |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716779A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Dynamic pressure blade type probe |
| CN107167259A (en) * | 2017-07-12 | 2017-09-15 | 南京工业大学 | A kind of multiple thermocouple assembly type temperature sensor and measurement correcting algorithm |
| CN108801486A (en) * | 2018-07-25 | 2018-11-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Temperature detector and cooking stove with it |
| CN108801485A (en) * | 2018-07-25 | 2018-11-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Temperature detector and cooking stove with it |
| CN108917963A (en) * | 2018-05-14 | 2018-11-30 | 北京航空航天大学 | A kind of quick response high-precision Procedure of Total-temperature Thermocouple Probes head construction |
-
2014
- 2014-05-06 CN CN201420226775.6U patent/CN203837834U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716779A (en) * | 2015-11-02 | 2016-06-29 | 北京航空航天大学 | Dynamic pressure blade type probe |
| CN105716779B (en) * | 2015-11-02 | 2019-02-22 | 北京航空航天大学 | Dynamic pressure blade profile probe |
| CN107167259A (en) * | 2017-07-12 | 2017-09-15 | 南京工业大学 | A kind of multiple thermocouple assembly type temperature sensor and measurement correcting algorithm |
| CN108917963A (en) * | 2018-05-14 | 2018-11-30 | 北京航空航天大学 | A kind of quick response high-precision Procedure of Total-temperature Thermocouple Probes head construction |
| CN108917963B (en) * | 2018-05-14 | 2020-04-28 | 北京航空航天大学 | Quick response high accuracy total temperature thermocouple head structure |
| CN108801486A (en) * | 2018-07-25 | 2018-11-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Temperature detector and cooking stove with it |
| CN108801485A (en) * | 2018-07-25 | 2018-11-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Temperature detector and cooking stove with it |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20170506 |