Thermocouple sensor

Abstract

The utility model relates to the technical field of thermocouples, in particular to a thermocouple sensor. The thermocouple sensor comprises a plurality of groups of thermode flange assemblies; any thermode flange assembly at least comprises an armored thermode and a flange plate; for different groups of thermode flange assemblies, the distances between the temperature measuring ends of the armored thermode and the end faces of the sides, facing the temperature measuring ends, of the flange plates are different in the axial direction of the armored thermode. The thermocouple sensor provided by the utility model can be used for measuring the temperature of turbine section temperature fields with the turbine section center as the circle center and different radiuses, solves the problem that a novel thermocouple sensor is urgently needed in the prior art, and at least has the characteristics of measuring the temperature of turbine section temperature fields with the turbine section center as the circle center and the temperature of turbine section temperature fields with different radiuses as the circle center. And the temperature of the turbine section temperature field under different radiuses can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a thermocouple sensor. Background Art

[0002] During the operation of an aircraft engine, after the gas is discharged from the combustion chamber, the temperature of the engine cross section is uneven. After passing through the high-speed rotating turbine, the extremely uneven temperature field cannot be completely mixed. Therefore, the radial cross-sectional temperature field at the engine turbine outlet is uneven. Improper setting of the thermocouple measuring point position will affect the judgment of the engine performance. This requires that the measuring points should be reasonably arranged after the turbine to accurately measure the average temperature of the gas.

[0003] like Figure 1 As shown, in the prior art, a thermocouple sensor is usually used to measure the temperature of the cross-sectional temperature field of the turbine outlet. The thermocouple sensor is a commonly used thermocouple sensor in the prior art, which has a plurality of flange thermoelectrode assemblies. The flange thermoelectrode assembly includes a flange plate for fixing on the engine casing, and a thermoelectrode for measuring temperature. When in use, the flange plate is fixed to the engine casing, and the temperature measuring end of the thermoelectrode is extended into the turbine cross-sectional temperature field to measure the temperature.

[0004] In the prior art, along the axial direction of the thermocouple, the distance between the temperature measuring end of the thermocouple and the end face of the flange facing the temperature measuring end is the same. This results in the temperature measuring end of the thermocouple extending into the temperature field of the turbine section to be the same after the flange is fixed to the engine casing. This results in multiple thermocouples in the prior art being able to only measure the temperature of the turbine section temperature field at the same radius with the center of the turbine section as the center of the circle along the radial direction of the turbine, but being unable to measure the temperature of the turbine section temperature field at different radii with the center of the turbine section as the center of the circle. As mentioned above, the radial section temperature field of the turbine is uneven, which results in the average temperature output by the thermocouple sensor being extremely inaccurate, resulting in misjudgment of the turbine section temperature.

[0005] In summary, in the prior art, there is an urgent need to propose a new thermocouple sensor, which at least has the function of measuring the temperature of the turbine cross-section temperature field at different radii with the center of the turbine cross-section as the center of the circle. Utility Model Content

[0006] In view of the existing technology, it is urgently necessary to propose a new thermocouple sensor, which at least has the technical problem of being able to measure the temperature of the turbine section temperature field at different radii with the center of the turbine section as the center of the circle. The utility model provides a thermocouple sensor.

[0007] The utility model is realized by the following technical solutions:

[0008] A thermocouple sensor, characterized in that it comprises a plurality of sets of thermocouple flange assemblies;

[0009] Any thermode flange assembly includes at least one armored thermode and one flange; for different groups of thermode flange assemblies, along the axial direction of the armored thermode, the distance between the temperature measuring end of the armored thermode and the end face of the flange facing the temperature measuring end is different.

[0010] Furthermore, the thermocouple flange assembly also includes a compensation wire, which is a flexible cable;

[0011] The thermode flange assembly also includes a transition structure, and the armored thermode and the compensation conductor are connected via the transition structure.

[0012] Furthermore, the thermocouple flange assembly also includes a spring, and the spring is sleeved outside the transition structure.

[0013] Further, it also includes a junction box socket;

[0014] The compensation wires of multiple groups of thermocouple flange assemblies are connected in parallel and crimped and fixed to the terminals in the junction box socket.

[0015] Further, the armored thermode and the flange of any thermode flange assembly are connected to each other by welding;

[0016] The thermode flange assembly also includes a flange pipe, which is sleeved outside the armored thermode and fixedly connected to the flange plate, and the temperature measuring end of the armored thermode extends from the flange pipe.

[0017] or,

[0018] The armored thermode and the flange of any thermode flange assembly can be installed at an adjustable position along the axial direction of the armored thermode, and the flange can be installed on the armored thermode.

[0019] Furthermore, a plurality of first clamping parts are arranged on the outer surface of the armored thermode along its axial direction, and a second clamping part is arranged on the flange;

[0020] Along the axial direction of the armored thermode, the second clamping portion can selectively form a clamping relationship with one of the first clamping portions.

[0021] Furthermore, along the axial direction of the armored thermode, the plurality of first clamping parts are distributed at equal intervals, or the distance between every two adjacent first clamping parts gradually increases, or the distance between every two adjacent first clamping parts gradually decreases.

[0022] Furthermore, the first engaging portion is provided with a first limiting portion and a second limiting portion;

[0023] The second engaging portion is provided with a first limiting groove and a second limiting groove;

[0024] Along the circumferential direction of the armored hot electrode, the first limiting portion and the first limiting groove may form a first unidirectional limiting relationship, and the second limiting portion and the second limiting groove may form a second unidirectional limiting relationship;

[0025] Along the circumferential direction of the armored thermode, the limiting direction of the first unidirectional limiting relationship is opposite to the limiting direction of the second unidirectional limiting relationship.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] 1. In the present invention, for different groups of thermocouple flange assemblies, along the axial direction of the armored thermocouple, the distance between the temperature measuring end of the armored thermocouple and the end face of the flange facing the temperature measuring end is different. This makes the thermocouple sensor of the present invention, when measuring the temperature of the turbine cross-section temperature field, the depth of the temperature measuring ends of different thermocouples extending into the temperature field is also different. This further leads to the fact that the thermocouple sensor of the present invention can measure the temperature of the turbine cross-section temperature field at different radii with the center of the turbine cross-section as the center of the circle, thereby making the average temperature output by the thermocouple sensor of the present invention more accurate than the prior art, and reducing the error between the measured average temperature value and the actual average temperature of the turbine cross-section temperature field. In summary, the present invention solves the technical problem existing in the prior art that a new thermocouple sensor is urgently needed, which at least has the ability to measure the temperature of the turbine cross-section temperature field at different radii with the center of the turbine cross-section as the center of the circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of a thermocouple sensor of the prior art structure;

[0029] Figure 2 This is a schematic diagram of the structure of the thermocouple sensor of Example 1;

[0030] Figure 3 This is a schematic structural diagram of the hot electrode flange assembly of Example 1;

[0031] Figure 4 for Figure 2 A schematic diagram of the structure of another state;

[0032] Figure 5 for Figure 4 Schematic diagram of the structure of the middle junction box socket in direction A;

[0033] Figure 6 This is a schematic diagram of the structure of the compensation wire parallel circuit in Example 1;

[0034] Figure 7 This is a schematic diagram of the structure of a thermocouple sensor according to Example 2;

[0035] Figure 8 This is a schematic structural diagram of the thermocouple flange assembly of Example 2;

[0036] Fig. 9 This is a schematic diagram of the structure of the transfer tube of Example 2;

[0037] Fig.10 is a schematic structural diagram of the second engaging portion of Example 2;

[0038] Fig.11 This is a schematic diagram of the structure of the first limiting groove and the second limiting groove of Example 2.

[0039] Markings in the figure: armored hot electrode (301), temperature measuring end (302), flange (303), compensation wire (304), switching structure (305), spring (306), junction box socket (307), tail accessories (308)

[0040] Flange pipe (101);

[0041] A first engaging portion (201), a second engaging portion (202), a first limiting portion (203), a second limiting portion (204), a first limiting groove (205), and a second limiting groove (206). DETAILED DESCRIPTION

[0042] The following is a further non-restrictive detailed description of the utility model technical solution in conjunction with the preferred embodiment and its accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limitations on the utility model.

[0043] Example 1

[0044] like Figure 2 to Figure 4As shown, this embodiment proposes a thermocouple sensor, which includes multiple groups of thermocouple flange assemblies; any thermocouple flange assembly includes at least one armored thermode 301 and a flange 303; for different groups of thermocouple flange assemblies, along the axial direction of the armored thermode 301, the distance between the temperature measuring end 302 of the armored thermode 301 and the end face of the flange 303 facing the temperature measuring end 302 is different.

[0045] In this embodiment, the thermocouple sensor includes a plurality of groups of thermocouple flange assemblies. The number of thermocouple flange assemblies can be configured according to usage. Preferably, the number of thermocouple flange assemblies is 3.

[0046] Preferably, the armored thermode 301 and the flange 303 of any thermode flange assembly are connected to each other by welding.

[0047] From the background technology, it can be known that in the prior art, there is an urgent need to propose a new thermocouple sensor, which at least has the technical problem of being able to measure the temperature of the turbine section temperature field at different radii with the center of the turbine section as the center of the circle. The utility model provides a thermocouple sensor.

[0048] In this embodiment, for different groups of thermocouple flange assemblies, along the axial direction of the armored thermocouple 301, the distance between the temperature measuring end 302 of the armored thermocouple 301 and the end face of the flange 303 facing the temperature measuring end 302 is different, which makes the thermocouple sensor of this embodiment, when measuring the temperature of the turbine cross-section temperature field, the depth of the temperature measuring ends of different thermocouples extending into the temperature field is also different, which further leads to the use of the thermocouple sensor of this embodiment, which can measure the temperature of the turbine cross-section temperature field at different radii with the center of the turbine cross-section as the center of the circle, thereby making the average temperature output by the thermocouple sensor of this embodiment more accurate than the prior art, and reducing the error between the measured average temperature value and the actual average temperature of the turbine cross-section temperature field. In summary, this embodiment solves the technical problem that there is an urgent need to propose a new thermocouple sensor in the prior art, which at least has the ability to measure the temperature of the turbine cross-section temperature field at different radii with the center of the turbine cross-section as the center of the circle.

[0049] like Figure 2 to Figure 4 Furthermore, the present embodiment also includes the following technical solutions: the thermocouple flange assembly also includes a compensation wire 304, and the compensation wire 304 is a flexible cable; the thermocouple flange assembly also includes a transfer structure 305, and the armored thermocouple 301 and the compensation wire 304 are connected via the transfer structure 305.

[0050] In this embodiment, the armored thermode 301 transmits the temperature signal through the compensation wire 304. The compensation wire 304 connected to the armored thermode 301 is configured as a flexible cable. When installed on the aircraft engine, the flexible cable can be bent at a large angle, thereby avoiding interference between the wire and various components of the aircraft engine.

[0051] Furthermore, this embodiment also includes the following technical solution: the thermode flange assembly also includes a spring 306 , and the spring 306 is sleeved outside the adapter structure 305 .

[0052] In this embodiment, the structure of the transfer structure 305 is the prior art, and the connection method between the armored hot electrode 301 and the compensation wire 304 and the transfer structure 305 is also the prior art, which will not be described in detail here; preferably, the spring should at least cover the connection between the armored hot electrode 301 and the transfer structure 305, or the connection between the compensation wire 304 and the transfer structure 305; in this embodiment, by arranging a spring outside the transfer structure 305, a protective effect is played on the connection between the armored hot electrode 301 and the transfer structure 305, or the connection between the compensation wire 304 and the transfer structure 305.

[0053] like Figure 2 , Figures 4 to 6 As shown, further, this embodiment also includes the following technical solutions, including a junction box socket 307; the compensation wires 304 of multiple groups of thermocouple flange assemblies are connected in parallel and crimped and fixed to the terminals in the junction box socket 307.

[0054] The structure of the junction box socket 307 is prior art and will not be elaborated here. In the present embodiment, the compensation wires 304 of the multiple groups of thermoelectrode flange assemblies are connected in parallel and crimped and fixed with the terminals in the junction box socket 307. For example, in the present embodiment, the terminals in the junction box socket 307 are terminal A and terminal B. After the compensation wires 304 are connected in parallel, the positive pole is crimped and connected with the A terminal, and the negative pole is crimped and connected with the B terminal, and finally they are tightened and fixed by the tail accessory 308. The junction box socket 307 is connected to the junction box plug to transmit signals.

[0055] Furthermore, the present embodiment also includes the following technical solution: the thermode flange assembly also includes a flange tube 101, the flange tube 101 is sleeved outside the armored thermode 301 and fixedly connected to the flange plate 303, and the temperature measuring end 302 of the armored thermode 301 extends from the flange tube 101.

[0056] The axial length of the flange pipe 101 can be configured according to specific circumstances, which will not be elaborated here. Preferably, the axial lengths of the flange pipe 101 in different thermocouple flange assemblies are different; the flange pipe 101 and the flange plate 303 can be fixedly connected by integral processing or welding; in this embodiment, the thermocouple flange assembly also includes a flange pipe 101, which is sleeved on the outside of the armored thermocouple 301 to protect and reinforce the outer surface of the armored thermocouple 301.

[0057] When in use, each flange 303 is fixed to the engine casing respectively, and the temperature measuring ends of multiple armored thermodes are respectively extended to different depths in the temperature field of the turbine section, that is, the temperature of the turbine section temperature field at different radii with the center of the turbine section as the center of the circle is measured. After the measurement, the signal is transmitted through the parallel compensation wire and finally output to the engine controller through the A and B terminals of the junction box socket.

[0058] Example 2

[0059] This embodiment is improved on the basis of the embodiment 1, and only the changed parts are described in detail below.

[0060] like Figure 7-Figure 8 As shown, in the thermocouple sensor in this embodiment, the armored thermode 301 and the flange 303 of any thermode flange assembly are adjustable along the axial direction of the armored thermode 301, and the installation position of the flange 303 on the armored thermode 301 is adjustable.

[0061] For more details, please refer to Figures 9 to 11 The outer surface of the armored thermode 301 is provided with a plurality of first engaging portions 201 along its axial direction, and the flange 303 is provided with a second engaging portion 202; along the axial direction of the armored thermode 301, the second engaging portion 202 can selectively form an engaging relationship with one of the first engaging portions 201.

[0062] The first clamping portion 201 can be directly connected to the outer surface of the armored thermode 301, or can be indirectly connected. Preferably, in the present embodiment, a transfer tube is also included, and the inner wall of the transfer tube is fixedly connected to the outer surface of the armored thermode 301. The fixed connection form can adopt one of the existing technologies, such as welding; the outer wall of the transfer tube is processed to form a plurality of first clamping portions 201.

[0063] Furthermore, along the axial direction of the armored thermode 301, the plurality of first clamping parts 201 are distributed at equal intervals, or the distance between every two adjacent first clamping parts 201 gradually increases, or the distance between every two adjacent first clamping parts 201 gradually decreases.

[0064] Preferably, the first engaging portion 201 is a protrusion, and the second engaging portion 202 is a through hole. If one of the protrusions is located in one of the through holes and has an interference fit with the hole wall of the through hole, the second engaging portion 202 and one of the first engaging portions 201 form an engaging relationship.

[0065] In Example 1, the armored thermode 301 and the flange 303 are fixed by welding. Once the welding is completed, the positional relationship between the armored thermode 301 and the flange 303 cannot be changed. Compared with Example 1, in this embodiment, the installation position of the flange 303 on the armored thermode 301 is adjustable along the axial direction of the armored thermode 301. Only by using one thermode flange assembly, the armored thermode 301 and the flange 303 of the same thermode flange assembly can be changed. The installation position of the flange 303 on the armored thermode 301 along the axial direction of the armored thermode 301 can realize the measurement of the temperature of the turbine section at different radii with the center of the turbine section as the center of the circle, which is very convenient.

[0066] Furthermore, it is mentioned in the foregoing content that the present embodiment enables the second engaging portion 202 to selectively form an engaging relationship with one of the first engaging portions 201 along the axial direction of the armored thermode 301; then, along the axial direction of the armored thermode 301, after the first engaging portion and the second engaging portion are engaged, how to avoid the first engaging portion and the second engaging portion from rotating relative to each other along the circumferential direction of the armored thermode 301 is a technical problem that needs to be solved. This technical problem is solved by the following technical solution.

[0067] like Figures 9 to 11 The first clamping part 201 is provided with a first limiting part 203 and a second limiting part 204; the second clamping part 202 is provided with a first limiting groove 205 and a second limiting groove 206; along the circumferential direction of the armored thermode 301, the first limiting part 203 and the first limiting groove 205 can form a first unidirectional limiting relationship, and the second limiting part 204 and the second limiting groove 206 can form a second unidirectional limiting relationship; along the circumferential direction of the armored thermode 301, the limiting direction of the first unidirectional limiting relationship is opposite to the limiting direction of the second unidirectional limiting relationship.

[0068] In this embodiment, along the axial direction of the armored thermode 301, after the first clamping portion and the second clamping portion are engaged, the first limiting portion 203 and the first limiting groove 205 form a first unidirectional limiting relationship, and the second limiting portion 204 and the second limiting groove 206 form a second unidirectional limiting relationship, so that the rotation of the first clamping portion relative to the second clamping portion in the counterclockwise direction and the clockwise direction along the circumferential direction of the armored thermode 301 is restricted, and thus the first clamping portion and the second clamping portion cannot rotate relative to each other along the circumferential direction of the armored thermode 301; therefore, this embodiment solves the technical problem of how to avoid the first clamping portion and the second clamping portion from rotating relative to each other along the circumferential direction of the armored thermode 301 after the first clamping portion and the second clamping portion are engaged.

[0069] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A thermocouple sensor, characterized in that: It includes a plurality of sets of hot electrode flange assemblies; Any thermocouple flange assembly comprises at least one armored thermocouple (301) and one flange (303); for different groups of thermocouple flange assemblies, along the axial direction of the armored thermocouple (301), the distances between the temperature measuring end (302) of the armored thermocouple (301) and the end face of the flange (303) facing the temperature measuring end (302) are different.

2. The thermocouple sensor according to claim 1, characterized in that: The thermocouple flange assembly also includes a compensation wire (304), and the compensation wire (304) is a flexible cable; The thermode flange assembly also includes a transition structure (305), and the armored thermode (301) and the compensation conductor (304) are connected via the transition structure (305).

3. The thermocouple sensor according to claim 2, characterized in that: The thermocouple flange assembly also includes a spring (306), which is sleeved outside the transfer structure (305).

4. The thermocouple sensor according to claim 3, characterized in that: Also includes a junction box socket (307); The compensation wires (304) of the multiple groups of thermocouple flange assemblies are connected in parallel and are crimped and fixed to the terminals in the junction box socket (307).

5. The thermocouple sensor according to claim 4, characterized in that: The armored thermode (301) and the flange (303) of any thermode flange assembly are connected to each other by welding; The thermode flange assembly also includes a flange pipe (101), which is sleeved outside the armored thermode (301) and fixedly connected to the flange plate (303). The temperature measuring end (302) of the armored thermode (301) extends from the flange pipe (101).

6. The thermocouple sensor according to claim 4, characterized in that: The armored thermode (301) and the flange (303) of any thermode flange assembly are adjustable along the axial direction of the armored thermode (301), and the installation position of the flange (303) on the armored thermode (301) is adjustable.

7. The thermocouple sensor according to claim 6, characterized in that: The outer surface of the armored hot electrode (301) is provided with a plurality of first clamping parts (201) along its axial direction, and the flange (303) is provided with a second clamping part (202); Along the axial direction of the armored thermode (301), the second engaging portion (202) can selectively form an engaging relationship with one of the first engaging portions (201).

8. The thermocouple sensor according to claim 7, characterized in that: Along the axial direction of the armored hot electrode (301), the plurality of first clamping parts (201) are distributed at equal intervals, or the distance between every two adjacent first clamping parts (201) gradually increases, or the distance between every two adjacent first clamping parts (201) gradually decreases.

9. The thermocouple sensor according to claim 8, characterized in that: The first engaging portion (201) is provided with a first limiting portion (203) and a second limiting portion (204); The second engaging portion (202) is provided with a first limiting groove (205) and a second limiting groove (206); Along the circumferential direction of the armored hot electrode (301), the first limiting portion (203) and the first limiting groove (205) can form a first unidirectional limiting relationship, and the second limiting portion (204) and the second limiting groove (206) can form a second unidirectional limiting relationship; Along the circumferential direction of the armored thermode (301), the limiting direction of the first unidirectional limiting relationship is opposite to the limiting direction of the second unidirectional limiting relationship.

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