CN109752148B - Air leakage detection sensor for airplane high-temperature pipeline joint - Google Patents
Air leakage detection sensor for airplane high-temperature pipeline joint Download PDFInfo
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- CN109752148B CN109752148B CN201811642662.3A CN201811642662A CN109752148B CN 109752148 B CN109752148 B CN 109752148B CN 201811642662 A CN201811642662 A CN 201811642662A CN 109752148 B CN109752148 B CN 109752148B
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Abstract
The invention discloses a gas leakage detection sensor for a high-temperature pipeline joint of an airplane; the sensor is characterized in that the joint of a high-temperature pipeline is arranged inside the sensor through a cavity assembly, a temperature sensing element is arranged inside the cavity assembly, and the temperature sensing element is connected with an external testing device through an electric connector. When the high-temperature pipeline connecting joint leaks, high-temperature gas in the pipeline is sprayed out, and the internal environment temperature of the sensor cavity rises; the temperature sensing element is transmitted to an external testing device through the electric connector; the detection is easy for workers; compared with the traditional metal platinum temperature sensor, the sensor has higher response rate, convenient installation and light weight; compared with a common semiconductor type temperature sensor, the semiconductor type temperature sensor has higher precision, response speed and environmental adaptability; on the other hand, the research and development of the air leakage detection sensor for the high-temperature pipeline connecting joint fills up the technical blank of air leakage detection of the high-temperature pipeline of the airplane in China.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of airplane air entraining systems, and relates to an air leakage detection sensor at a high-temperature pipeline connection part of an airplane.
[ background of the invention ]
The air-entraining system of the aircraft engine has the functions of entraining air from an air compressor of the engine, supplying the air to an air source user system, including an on-board air conditioner, heating and anti-icing of wings and a fairing, drinking water and boosting of a hydraulic system, and providing high-temperature and high-pressure air with certain temperature and pressure for an engine starting system. The high-temperature pipeline is used for transmitting bleed air of the aircraft engine to each air source user system, so that the high-temperature pipeline is long in travel path and has multiple joints, and the joints are easy to leak air due to loose connection, so that the normal operation of multiple systems on the aircraft is influenced; therefore, the air tightness of the high-temperature pipeline connection part on the airplane is related to the flight safety of the airplane and has important influence on the comfort of the cabin environment.
The high-temperature pipeline of the airplane penetrates through the whole airplane body and is divided into a left bleed air pipeline and a right bleed air pipeline, and the number of joints of the whole pipeline is as high as 40, so that the air tightness of the high-temperature pipeline of the airplane can be quickly detected by a sensor.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides a gas leakage detection sensor at the joint of a high-temperature pipeline of an airplane; the sensor detects the environmental temperature at the joint in real time through a novel metal alloy type temperature sensing element; whether the joint leaks air or not is judged through the change of the environmental temperature, and an operator can monitor the joint conveniently.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a gas leakage detection sensor for a high-temperature pipeline joint of an airplane comprises a cavity assembly, wherein the cavity assembly is sleeved outside the high-temperature pipeline joint, an annular temperature sensing assembly is fixedly arranged inside the cavity assembly, and an electric connector is fixedly arranged on one side wall of the cavity assembly;
the temperature sensing component is fixedly provided with a temperature sensing element, the temperature sensing element senses temperature through platinum metal, the temperature sensing element is connected with the electric connector through a lead, and the electric connector is connected with an external testing device.
The invention is further improved in that:
preferably, the cavity assembly comprises a cylindrical wall, the cylindrical wall is cylindrical, and two side walls of the cylindrical wall are respectively connected with a first side wall and a second side wall; hollow circles are arranged at the center positions of the first side wall and the second side wall, the high-temperature pipeline penetrates through the two hollow circles, and the connection position of the two high-temperature pipelines is located inside the cavity assembly.
Preferably, the cavity assembly comprises a first cavity and a second cavity which are equal in volume, and each cavity consists of half of the first side wall, half of the second side wall and half of the cylindrical wall; the top of the first cavity and the second cavity are connected through two fasteners, and the bottom of the first cavity and the second cavity are connected through a hinge and a rivet.
Preferably, a sealing ring is fixedly arranged on the outer side of each of the two hollow circles.
Preferably, the temperature sensing assembly comprises an annular polytetrafluoroethylene thermal insulation plate and a temperature sensing element, the temperature sensing element is fixedly arranged on the polytetrafluoroethylene thermal insulation plate, and the polytetrafluoroethylene thermal insulation plate is fixedly arranged inside the cavity assembly.
Preferably, each temperature sensing element is adhered to a glass fiber cloth plate, each glass fiber cloth plate is adhered to a liner, and the liner is adhered to the polytetrafluoroethylene thermal insulation plate; on the liner, a wiring terminal is arranged above the temperature sensing element, the wiring terminal is connected with the temperature sensing element through a lead, and the wiring terminal is connected with the electric connector through a lead.
Preferably, the temperature sensing element comprises a substrate and a platinum sheet, wherein the platinum sheet is adhered to the substrate, and the substrate is adhered to the glass fiber cloth plate; an adjusting grid and a sensitive grid are arranged on the platinum sheet, and a distance is reserved between the adjusting grid and the sensitive grid.
Preferably, three temperature sensing elements are fixedly arranged on the polytetrafluoroethylene thermal insulation plate, and the annular polytetrafluoroethylene thermal insulation plate is equally divided by the three temperature sensing elements.
Preferably, the electric connector is provided with 13 pin ports; 7 of the 13 pin ports are connected with the three temperature sensing elements, 1 pin port is connected to the shielding wire, and 5 pin ports are connected to an external testing device.
Preferably, 2 temperature sensing elements are connected to 7 pin ports connected to the temperature sensing elements, and 1 pin port is shared by three temperature sensing elements.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a gas leakage detection sensor for a high-temperature pipeline joint of an airplane; the sensor is characterized in that the joint of a high-temperature pipeline is arranged inside the sensor through a cavity assembly, a temperature sensing element is arranged inside the cavity assembly, and the temperature sensing element is connected with an external testing device through an electric connector. When the high-temperature pipeline connecting joint leaks, high-temperature gas in the pipeline is sprayed out, and the internal environment temperature of the sensor cavity rises; the temperature sensing element is transmitted to an external testing device through the electric connector; the detection is easy for workers; compared with the traditional metal platinum temperature sensor, the sensor has higher response rate, convenient installation and light weight; compared with a common semiconductor type temperature sensor, the semiconductor type temperature sensor has higher precision, response speed and environmental adaptability; on the other hand, the research and development of the air leakage detection sensor for the high-temperature pipeline connecting joint fills up the technical blank of air leakage detection of the high-temperature pipeline of the airplane in China.
Furthermore, the cavity assembly is sleeved outside the joint in a barrel shape, so that the sealed cavity can easily detect the temperature change, and the barrel-shaped cavity assembly can easily install the annular temperature sensing assembly inside the cavity assembly.
Furthermore, the cavity assembly is divided into two cavities, so that the whole temperature sensor can be easily sleeved on the outer side of the joint.
Furthermore, two sealing rings are arranged on two sides of the cavity assembly, so that the sealing performance of the cavity assembly is further guaranteed.
Furthermore, the temperature sensing element is installed in the cavity through the polytetrafluoroethylene thermal insulation board, the polytetrafluoroethylene thermal insulation board divides the temperature sensing element from the sensor cavity, and the temperature sensing element cannot cause the ambient temperature sensed by the temperature sensing element to become low due to heat dissipation of the cavity.
Furthermore, each temperature sensing element is fixedly arranged on the polytetrafluoroethylene thermal insulation board through a glass fiber cloth board and a liner, so that the temperature sensing elements are better fixed.
Furthermore, each temperature sensing element is made of platinum to form a wire grid structure, so that the weight is light, the sensitivity is high, the environmental adaptability is good, and the measurement precision is high.
Furthermore, 3 temperature sensing elements are mounted on the temperature sensing assembly and are distributed in an annular shape with an included angle of 120 degrees respectively, and the mounting positions of the temperature sensing elements are right opposite to the connecting interface position of the high-temperature pipeline, so that the change of the internal environment temperature of the cavity can be sensed at the fastest speed, and the change of the resistance value of the cavity can be caused.
Further, the temperature sensing element transmits the measured data to an external detection device through the electric connector.
[ description of the drawings ]
FIG. 1 is an exploded view of the structure of the sensor of the present invention;
FIG. 2 is a schematic structural view of the sensor and high temperature piping assembly of the present invention;
FIG. 3 is a front view of the sensor of the present invention;
FIG. 4 is a side view of a sensor of the present invention;
FIG. 5 is a side view of the internal structure of the sensor of the present invention;
FIG. 6 is an inside view of the electrical connector of the present invention;
FIG. 7 is a structural diagram of a temperature sensing assembly of the present invention;
FIG. 8 is a side view of a half of the Teflon insulation panel of the present invention;
FIG. 9 is a schematic structural diagram of a temperature sensing element according to the present invention;
wherein: 1-a chamber component; 2-a temperature sensing component; 3-a fastener; 4-an electrical connector; 5-high temperature pipeline; 6-a first cavity; 7-a second cavity; 8-cylindrical wall; 9-a first side wall; 10-a second side wall; 11-a polytetrafluoroethylene thermal insulation board; 12-a liner; 13-a connecting terminal; 14-glass cloth plate; 15-a temperature-sensitive element; 16-a nut; 17-a screw; 18-a sealing ring; 19-a hinge; 20-riveting; 21-a substrate; 22-a regulating grid; 23-a sensitive grid; 24-platinum sheet; 25-needle insertion.
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings; the invention discloses a gas leakage detection sensor for a high-temperature pipeline joint of an airplane; referring to the exploded view of fig. 1, all components of the sensor are exploded; the sensor comprises a cavity component 1, a temperature sensing component 2 and an electric connector 3; the cavity component 1 is used as a supporting structure and is fixedly arranged outside the joint of the high-temperature pipeline 5, the temperature sensing component 2 is fixedly arranged on the inner wall of the cavity component 1 in a surrounding manner, and the electric connector 3 is fixedly arranged on one side wall of the cavity component 1.
Referring to fig. 2 and 3, the cavity assembly 1 of the present invention is a barrel-shaped cavity, two side walls are disposed at two ends of the cavity assembly, the two side walls are respectively a cylindrical wall 8, a first side wall 9 and a second side wall 10, the first side wall 9 and the second side wall 10 are respectively fixedly connected with two circular side edges of the cylindrical wall 8, a hollow circle is disposed at the center of each of the first side wall 9 and the second side wall 10, the two hollow circles are coaxial, and the high temperature pipeline 5 passes through the two hollow circles, such that the connection of the high temperature pipeline 5 is located at the inner wall of the cavity assembly 1; sealing rings 18 are respectively arranged at the outer sides of the two hollow circles; half of the first side wall 9, half of the second side wall 10 and half of the cylindrical wall 8 form a first cavity 6, and the other corresponding half is a second cavity 7; the first cavity 6 and the second cavity 7 are both semicircular cavity components; the top of two cylinder walls 8 that halve is through two fastener 3 fixed connection, see fig. 4, the bottom is rotated through hinge 19 and rivet 20 and is connected for first cavity 6 and second cavity 7 are in the same place, with the junction parcel of high temperature pipeline 5 inside, each sealing ring 18 is divided into two parts equally, two parts are connected through fastening bolt, can further fasten first cavity 6 and second cavity 7 on the one hand, also can prevent simultaneously that the gas leakage of junction from leaking from two hollow circles, influence temperature-sensing element 15 and measure ambient temperature.
Referring to fig. 5, the temperature sensing assembly 2 includes three temperature sensing elements 15, a glass cloth plate 14, a connection terminal 13, a gasket 12 and a teflon insulating plate 11; the polytetrafluoroethylene thermal insulation board 11 is an annular board, and is fixedly arranged on the inner wall of the cavity assembly 1 through a rivet 20, and the installation position of the polytetrafluoroethylene thermal insulation board is over against the joint of the high-temperature pipeline 5 and is arranged outside the joint, as shown in fig. 2; the three temperature sensing elements 15 are uniformly distributed and fixed on the polytetrafluoroethylene thermal insulation plate 11, namely, the included angles of every two temperature sensing elements 15 are 120 degrees; referring to fig. 7 and 8, each temperature sensing element 15 is adhered to a glass cloth plate 14 by high temperature glue, one glass cloth plate 14 is adhered to a pad 12 by high temperature glue, and the pad 12 is made of metal; the gasket 12 is fixed on the polytetrafluoroethylene thermal insulation board 11 through a rivet 20; the pad 12 is provided with a connection terminal 13 beside each temperature sensing element 15, referring to fig. 6, each connection terminal 13 is connected with the temperature sensing element 15 through a conductive wire, and each connection terminal 13 is connected with the electric connector 13 through a connection wire; the 3 temperature sensing elements sense the environmental temperature at the joint of the high-temperature pipeline in real time, the change of the environmental temperature is converted into the change of the resistance value of the temperature sensing elements, and finally, the signals are output through the electric connector 3; because the three temperature sensing elements 15 are respectively distributed in a ring shape with 120-degree included angles, the installation position of the temperature sensing elements 15 is over against the connecting interface position of the high-temperature pipeline 5, the change of the internal environment temperature of the cavity can be sensed at the fastest speed, and the change of the resistance value of the cavity can be caused.
Referring to fig. 9, each temperature sensing element 15 is a wire grid structure made of platinum metal, and specifically includes a substrate 21 and a platinum sheet 24, the bottom of the platinum sheet 24 is fixedly connected to the substrate 21 by adhesion, and the substrate 21 is adhered to the glass cloth plate 14 by high-temperature adhesive; the substrate 21 is made of insulating plastic, and the platinum sheet 24 is etched with an adjusting grid 22 and a sensitive grid 23; the temperature sensing element 15 can finely adjust the normal temperature resistance of the temperature sensing element 15 by grinding the thickness of the adjusting grid 22, the sensing grid 23 is used for sensing temperature, the whole platinum sheet 24 is connected with the connecting terminal 13 through an electric lead, the electric lead is connected with the platinum sheet 24 through welding, and the electric lead is inserted into the connecting terminal 13; the temperature sensing element 15 has the advantages of large resistance temperature coefficient, high sensitivity, light weight and good environmental adaptability; the manufacturing process flow of the temperature sensing element 15 mainly comprises the procedures of substrate manufacturing, pattern photoetching, resistance corrosion, resistance adjustment, cover layer manufacturing, finished product inspection, substrate shaping, resistance sorting and the like, and the temperature measurement precision is high.
Referring to fig. 7 and 8, the electrical connector 3 is fixedly mounted on the first side wall 9 or the second side wall 10 by a nut 16 and a screw 17; the electric connector 3 is provided with 13 pin ports 25, 7 of the 13 pin ports 25 are connected with all the connecting terminals 13 of the three temperature sensing elements 15, 1 of the rest is a shielding wire, and 5 are connected to an external testing device; in 7 pin sockets 25 connected to the connection terminals 13 of the temperature sensing elements 15, two temperature sensing elements 15 are individually inserted, 6 in total, and the remaining 1 pin socket 25 is shared by the three temperature sensing elements 15.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The air leakage detection sensor for the high-temperature pipeline joint of the airplane is characterized by comprising a cavity assembly (1), wherein the cavity assembly (1) is sleeved outside the joint of a high-temperature pipeline (5), an annular temperature sensing assembly (2) is fixedly arranged inside the cavity assembly (1), and an electric connector (4) is fixedly arranged on one side wall of the cavity assembly (1);
a temperature sensing element (15) is fixedly arranged on the temperature sensing component (2), the temperature sensing element (15) senses temperature through platinum metal, the temperature sensing element (15) is connected with the electric connector (4) through a lead, and the electric connector (4) is connected with an external testing device;
the temperature sensing assembly (2) comprises an annular polytetrafluoroethylene thermal insulation plate (11) and a temperature sensing element (15), the temperature sensing element (15) is fixedly arranged on the polytetrafluoroethylene thermal insulation plate (11), and the polytetrafluoroethylene thermal insulation plate (11) is fixedly arranged in the cavity assembly (1);
each temperature sensing element (15) is pasted on a glass fiber cloth plate (14), each glass fiber cloth plate (14) is pasted on a gasket (12), and the gasket (12) is fixed on the polytetrafluoroethylene thermal insulation plate (11) through a rivet (20); a wiring terminal (13) is arranged beside the temperature sensing element (15) on the pad (12), the wiring terminal (13) is connected with the temperature sensing element (15) through a lead, and the wiring terminal (13) is connected with the electric connector (4) through a lead;
the temperature sensing element (15) comprises a substrate (21) and a platinum sheet (24), the platinum sheet (24) is pasted on the substrate (21), and the substrate (21) is pasted on the glass fiber cloth plate (14); an adjusting grid (22) and a sensitive grid (23) are arranged on the platinum sheet (24), and a distance is reserved between the adjusting grid (22) and the sensitive grid (23).
2. The aircraft high-temperature pipeline joint air leakage detection sensor according to claim 1, characterized in that the cavity assembly (1) comprises a cylindrical wall (8), the cylindrical wall (8) is cylindrical, and a first side wall (9) and a second side wall (10) are respectively connected to two side walls of the cylindrical wall; hollow circles are arranged at the center positions of the first side wall (9) and the second side wall (10), the high-temperature pipeline (5) penetrates through the two hollow circles, and the connection position of the two high-temperature pipelines (5) is located inside the cavity assembly (1).
3. The aircraft high-temperature pipeline connection air leakage detection sensor according to claim 2, wherein the cavity assembly (1) comprises a first cavity (6) and a second cavity (7) which are equal in volume, and each cavity is composed of a half of the first side wall (9), a half of the second side wall (10) and a half of the cylindrical wall (8); the top of the first cavity (6) is connected with the top of the second cavity (7) through two fasteners (3), and the bottom of the first cavity is connected with a rivet (20) through a hinge (19).
4. The aircraft high-temperature pipeline joint air leakage detection sensor according to claim 2, wherein the outer sides of the two hollow circles are respectively fixedly provided with a sealing ring (18).
5. The aircraft high-temperature pipeline joint air leakage detection sensor according to claim 1, wherein three temperature sensing elements (15) are fixedly arranged on the polytetrafluoroethylene thermal insulation board (11), and the annular polytetrafluoroethylene thermal insulation board (11) is equally divided by the three temperature sensing elements (15).
6. The aircraft high-temperature pipeline connection air leakage detection sensor is characterized in that 13 pin ports (25) are formed in the electric connector (4); 7 of the 13 pin ports (25) are connected with the three temperature sensing elements (15), 1 pin port (25) is connected to the shielding wire, and 5 pin ports (25) are connected to an external testing device.
7. The aircraft high-temperature pipeline joint air leakage detection sensor according to claim 6, characterized in that, 2 temperature sensing elements (15) are connected to 7 pin ports (25) connected with the temperature sensing elements (15), and three temperature sensing elements (15) share 1 pin port (25).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811642662.3A CN109752148B (en) | 2018-12-29 | 2018-12-29 | Air leakage detection sensor for airplane high-temperature pipeline joint |
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| CN201811642662.3A CN109752148B (en) | 2018-12-29 | 2018-12-29 | Air leakage detection sensor for airplane high-temperature pipeline joint |
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| CN109752148A CN109752148A (en) | 2019-05-14 |
| CN109752148B true CN109752148B (en) | 2021-04-02 |
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| CN113008466A (en) * | 2021-02-22 | 2021-06-22 | 潍柴动力股份有限公司 | Aftertreatment assembly air leakage detection device |
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| CN102162765B (en) * | 2011-01-26 | 2012-06-06 | 南京航空航天大学 | System and method for detecting leakage of high-temperature gas in high-temperature high-pressure guide pipe of airplane |
| CN202329533U (en) * | 2011-08-09 | 2012-07-11 | 浙江大合建设工程检测有限公司 | Strain gauge |
| CN103615967B (en) * | 2013-11-30 | 2016-09-21 | 中航电测仪器股份有限公司 | A kind of high temperature foil strain gauge and manufacture method thereof |
| CN103775831B (en) * | 2014-01-20 | 2017-04-05 | 江苏科技大学 | Aircraft high temperature pressure air duct leak detection system |
| JP6501553B2 (en) * | 2015-02-18 | 2019-04-17 | 三菱航空機株式会社 | Piping structure and aircraft |
| CN107121238A (en) * | 2017-05-12 | 2017-09-01 | 上海电力学院 | A kind of eminence gas leak detection method for hot-gas channel |
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