A temperature measuring sensor

Abstract

The application belongs to the technical field of temperature measurement of cooling gas in a cooling channel formed between a heat shield and a nozzle of an aero-engine, and particularly relates to a temperature measurement sensor, which comprises an outer support rod, an outer communication channel in the outer support rod, a side wall of the outer support rod having an outer flow through groove and an outer flow through hole, one end of the outer communication channel extending to one end of the outer support rod, the other end of the outer communication channel extending to the outer flow through hole, the outer flow through groove being located between the other end of the outer support rod and the outer flow through hole, and a thermocouple arranged in the outer flow through hole and having a lead wire drawn out through the outer communication channel.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of temperature measurement of cooling gas in a cooling channel formed between a heat shield and a nozzle of an aero-engine, and particularly relates to a temperature measurement sensor. BACKGROUND

[0002] The nozzle is arranged at the tail of the aero-engine and used for spraying high-temperature gas to generate thrust. In order to avoid ablation of the nozzle caused by high temperature, a heat shield is arranged inside the nozzle, so that the high-temperature gas flows in the heat shield and does not directly contact the nozzle. At the same time, cooling gas is introduced into a cooling channel formed between the heat shield and the nozzle to cool the heat shield and the nozzle, thereby avoiding ablation of the nozzle caused by high temperature.

[0003] The temperature and pressure of the high-temperature gas in the nozzle of the aero-engine are accurately measured, which provides data support for performance evaluation of the aero-engine. Therefore, a measurement hole is arranged on the nozzle and the heat shield, so that a corresponding temperature and pressure sensor can pass through the measurement hole and extend into the high-temperature gas flow field to measure the temperature and pressure of the high-temperature gas.

[0004] In addition, the temperature of the cooling gas in the cooling channel formed between the heat shield and the nozzle is accurately measured, which provides data support for design and improvement of related structures of the aero-engine. Currently, a temperature sensor is used to measure the temperature by extending into the cooling channel through a measurement hole arranged on the nozzle. In order to avoid the high-temperature gas in the nozzle of the aero-engine entering the cooling channel through the measurement hole arranged on the heat shield, the temperature sensor is used to block the measurement hole arranged on the heat shield. However, this technical solution has the following defects:

[0005] The temperature sensor directly contacts the high-temperature gas in the nozzle of the aero-engine, which causes serious heat conduction and serious high-temperature radiation, so that it is difficult to accurately measure the temperature of the cooling gas in the cooling channel.

[0006] The present application is proposed in view of the above technical defects.

[0007] It should be noted that the disclosure of the above background art is only used to assist in understanding the inventive concept and technical solutions of the present application, and it does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. SUMMARY

[0008] The purpose of the present application is to provide a temperature measurement sensor to overcome or alleviate at least one aspect of the known technical defects.

[0009] The technical solution of the present application is:

[0010] A temperature measurement sensor comprises:

[0011] The outer support rod has an outer communication channel inside, and its side wall has an outer flow channel and an outer flow hole. One end of the outer communication channel extends to one end of the outer support rod, and the other end extends to the outer flow hole. The outer flow channel is located between the other end of the outer support rod and the outer flow hole.

[0012] The thermocouple is arranged in the outer flow hole, and its lead wire is led out through the outer communication channel.

[0013] According to at least one embodiment of the present application, in the temperature measuring sensor, the cross section of the outer flow channel is arc-shaped and surrounds the outer flow hole.

[0014] According to at least one embodiment of the present application, in the temperature measuring sensor, the outer wall of the outer support rod away from the end of the outer flow channel has an annular mounting edge.

[0015] According to at least one embodiment of the present application, the temperature measuring sensor further comprises:

[0016] The ceramic tube is sleeved on the lead wire of the thermocouple and is led out through the communication channel.

[0017] According to at least one embodiment of the present application, the temperature measuring sensor further comprises:

[0018] The inner support rod has an inner communication channel inside, and one end of the inner communication channel extends to the other end of the inner support rod and extends to the inner flow hole.

[0019] The thermocouple is arranged in the inner flow hole, and its lead wire is led out through the inner communication channel.

[0020] According to at least one embodiment of the present application, the temperature measuring sensor further comprises:

[0021] The radiation shield is connected to the inner support rod and covers the inner flow hole, and has a through hole on it; the through hole communicates the outer flow hole and the inner flow hole.

[0022] According to at least one embodiment of the present application, in the temperature measuring sensor, the outer communication channel is step-shaped.

[0023] The outer wall of the inner support rod away from the end of the inner flow hole has a step-shaped protrusion.

[0024] The temperature measuring sensor further comprises:

[0025] The pressure cap has a lead wire hole on it and is screwed into the outer communication channel to press on the inner support rod, so that the step-shaped protrusion abuts against the step part of the outer communication channel.

[0026] The lead wire of the thermocouple is led out through the lead wire hole.

[0027] According to at least one embodiment of the present application, the temperature measuring sensor has a compensation wire connected to the lead wire of the thermocouple.

[0028] The temperature measuring sensor further comprises:

[0029] The adapter cylinder is screwed into the lead wire hole and sleeved on the connection part of the lead wire and the compensation wire of the thermocouple, and cement and / or sealant are filled in the adapter cylinder.

[0030] According to at least one embodiment of the present application, the temperature measuring sensor further comprises:

[0031] The wave-proof sleeve is sleeved on the compensation wire.

[0032] The lead wire clamp is connected to the adapter cylinder and clamps the wave-proof sleeve.

[0033] According to at least one embodiment of the present application, the temperature measuring sensor further comprises:

[0034] The pin is connected to the end of the compensation wire away from the lead wire of the thermocouple. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the temperature measuring sensor provided by the embodiments of the present application;

[0036] Figure 2 is a partial schematic diagram of the temperature measuring sensor provided by the embodiments of the present application;

[0037] Figure 3 is a schematic diagram of the temperature measuring sensor measuring the temperature of the cooling gas in the cooling channel formed between the heat shield and the nozzle of the aero-engine;

[0038] Figure 4 is a partial cross-sectional view of Figure 3 ;

[0039] wherein:

[0040] 1-outer strut; 2-thermocouple; 3-ceramic tube; 4-inner strut; 5-radiation shield; 6-press cap; 7-compensation wire; 8-adapter cylinder; 9-wave-proof sleeve; 10-lead wire clamp; 11-pin; 12-nozzle; 13-heat shield.

[0041] In order to better illustrate the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product. In addition, the drawings are only used for illustrative description and cannot be understood as a limitation of the patent. DETAILED DESCRIPTION

[0042] In order to make the technical solutions of the present application and the advantages thereof clearer, the technical solutions of the present application will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present application, which are used to explain the present application, but not to limit the present application. It should be noted that, for the purpose of description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the general design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0043] In addition, unless otherwise defined, the technical terms or scientific terms used in the present application description should be the general meaning understood by the general technical personnel in the field of the present application. The words indicating the direction or position relationship such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer" and the like used in the present application description are only used to indicate the relative direction or position relationship, but not to imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and the relative position relationship may also change accordingly when the absolute position of the described object changes, therefore it cannot be understood as a limitation on the present application. The "first", "second", "third" and the like used in the present application description are only for the purpose of description, and are used to distinguish different components, but cannot be understood as indicating or implying relative importance. The "one", "an" or "the" and the like used in the present application description should not be understood as an absolute limitation on the quantity, but should be understood as the existence of at least one. The "include" or "contain" and the like used in the present application description means that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects.

[0044] In addition, it should be noted that, unless otherwise specified and limited, the "mounting", "connection", "connection" and the like used in the present application description should be understood in a broad sense, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements, and the person skilled in the art can understand the specific meaning of the present application according to the specific circumstances.

[0045] The technical solutions of the present application will be further described in detail below with reference to the drawings. Figures 1 to 4 The present application will be further described in detail.

[0046] A temperature measurement sensor, comprising:

[0047] The outer support rod 1 has an outer communication channel inside, and the side wall has an outer flow channel and an outer flow hole. One end of the outer communication channel extends to one end of the outer support rod 1, and the other end extends to the outer flow hole. The outer flow channel is located between the other end of the outer support rod 1 and the outer flow hole.

[0048] The thermocouple 2 is arranged in the outer flow hole and the lead wire is led out through the outer communication channel.

[0049] For the temperature measuring sensor disclosed in the above embodiment, those skilled in the art can understand that the temperature of the cooling gas in the cooling channel formed between the heat shield 13 and the nozzle 12 of the aero-engine can be measured. When measuring the temperature of the cooling gas in the cooling channel formed between the heat shield 13 and the nozzle 12 of the aero-engine, the end of the outer support rod 1 close to the outer flow channel can be arranged through the measurement hole on the nozzle 12, and the end of the outer support rod 1 can block the measurement hole on the heat shield 13. The outer flow channel and the outer flow hole on the outer support rod 1 are located in the cooling channel formed between the heat shield 13 and the nozzle 12, and are parallel to the flow direction of the cooling gas in the cooling channel. The thermocouple 2 arranged in the outer flow hole can measure the temperature of the cooling gas in the cooling channel formed between the heat shield 13 and the nozzle 12.

[0050] For the temperature measuring sensor disclosed in the above embodiment, those skilled in the art can also understand that when measuring the temperature of the cooling gas in the cooling channel formed between the heat shield 13 and the nozzle 12 of the aero-engine, the cooling gas in the cooling channel can flow in the outer flow channel, which can reduce the heat conduction capacity of the outer support rod 1 at this part, avoid the heat conduction of the high-temperature gas in the heat shield 13 to the outer flow hole part, and affect the accuracy of the temperature measurement of the thermocouple 2 in the outer flow hole. In addition, the temperature rise of the outer flow hole part of the outer support rod 1 due to direct contact with the high-temperature gas in the heat shield 13 can be reduced locally. In this way, the influence of the high-temperature radiation of the side wall of the outer flow hole on the temperature measurement of the thermocouple 2 inside can be reduced, so that the temperature measurement of the thermocouple 2 in the outer flow hole of the cooling gas in the cooling channel has higher accuracy. The thermocouple 2 for measuring the temperature of the cooling gas in the cooling channel is arranged in the outer flow hole of the outer support rod 1, which can shield the high-temperature radiation of the heat shield 13 on the temperature measurement of the thermocouple 2, and ensure the accuracy of the temperature measurement of the thermocouple 2 in the outer flow hole of the cooling gas in the cooling channel.

[0051] For the temperature measuring sensor disclosed in the above embodiments, the shape and size of the outer support rod 1 can be designed according to the size of the measuring hole on the nozzle 12 and the relative position relationship between the heat shield 13 and the nozzle 12, so that the end of the outer support rod 1 close to the outer flow channel can pass through the measuring hole on the nozzle 12, block the measuring hole on the heat shield 13, and make the outer flow channel and the outer flow hole located in the cooling channel formed between the heat shield 13 and the nozzle 12.

[0052] In some optional embodiments, the cross section of the outer flow channel of the temperature measuring sensor is arc-shaped and surrounds the outer flow hole, which can effectively reduce the heat conduction to the outer flow hole and effectively reduce the temperature rise at the position of the outer flow hole.

[0053] In some optional embodiments, the outer wall of the end of the outer support rod 1 away from the outer flow channel has an annular mounting edge.

[0054] For the temperature measuring sensor disclosed in the above embodiments, the shape and size of the outer support rod 1 can be designed according to the size of the measuring hole on the nozzle 12 and the relative position relationship between the heat shield 13 and the nozzle 12, so that the end of the outer support rod 1 close to the outer flow channel can pass through the measuring hole on the nozzle 12, block the measuring hole on the heat shield 13, and make the outer flow channel and the outer flow hole located in the cooling channel formed between the heat shield 13 and the nozzle 12.

[0055] In some optional embodiments, the temperature measuring sensor further comprises:

[0056] The ceramic tube 3 is sleeved on the lead wire of the thermocouple 2 and is led out through the communication channel.

[0057] In some optional embodiments, the temperature measuring sensor further comprises:

[0058] The inner support rod 4 has an inner communication channel therein, one end of which extends into the outer flow hole through the outer communication channel, and the side wall of the end has an inner flow hole which is parallel to the outer flow hole and can be coaxially arranged; one end of the inner communication channel extends to the other end of the inner support rod 4, and the other end extends to the inner flow hole.

[0059] The thermocouple 2 is arranged in the inner flow hole, and the lead wire thereof is led out through the inner communication channel.

[0060] For the temperature measuring sensor disclosed in the above embodiment, the person skilled in the art can understand that the thermocouple 2 is arranged in the inner flow passage at the end of the outer communication passage through which the inner support rod 4 extends into the outer flow passage, and when the temperature of the cooling gas in the cooling passage formed between the heat shield 13 and the nozzle 12 of the aero-engine is measured, the influence of heat conduction and high-temperature radiation on the temperature measurement of the cooling gas in the cooling passage can be further reduced.

[0061] For the temperature measuring sensor disclosed in the above embodiment, the person skilled in the art can understand that the inner support rod 4 extends into the outer flow passage at one end of the outer communication passage, and a flow gap with a relatively small cross section is formed between the inner support rod 4 and the side wall of the outer flow passage close to the outer flow passage groove, and when the temperature of the cooling gas in the cooling passage formed between the heat shield 13 and the nozzle 12 of the aero-engine is measured, the cooling gas has a relatively large flow rate in the flow gap, and the heat exchange capacity between the cooling gas and the side wall of the outer flow passage is relatively large, so that the temperature of the side wall of the outer flow passage and the inner flow passage can be effectively reduced, and the influence of heat conduction and high-temperature radiation on the temperature measurement of the cooling gas in the cooling passage can be further effectively reduced.

[0062] In some optional embodiments, the temperature measuring sensor disclosed above further comprises:

[0063] The radiation shield 5 is connected to the inner support rod 4 and covers the inner flow passage, and can be arranged at the inlet end of the inner flow passage and has a plurality of through holes.

[0064] For the temperature measuring sensor disclosed in the above embodiment, the person skilled in the art can understand that when the temperature of the cooling gas in the cooling passage formed between the heat shield 13 and the nozzle 12 of the aero-engine is measured, the radiation shield 5 can further effectively shield the influence of high-temperature radiation on the temperature measurement of the cooling gas in the cooling passage.

[0065] In some optional embodiments, the temperature measuring sensor disclosed above, the outer communication passage is stepped.

[0066] The outer wall of the inner support rod 4 away from the inner flow passage has a stepped protrusion.

[0067] The temperature measuring sensor further comprises:

[0068] The pressure cap 6 has a lead hole and is screwed into the outer communication passage to press the inner support rod 4, so that the stepped protrusion is abutted at the stepped part of the outer communication passage.

[0069] The lead of the thermocouple 2 is led out through the lead hole.

[0070] In some alternative embodiments, the temperature measuring sensor described above, the lead wire of the thermocouple 2 is connected with a compensation wire 7;

[0071] The temperature measuring sensor further comprises:

[0072] The adapter sleeve 8 is screwed in the lead wire hole, and is sleeved on the connection part of the lead wire of the thermocouple 2 and the compensation wire 7, and is filled with cement and / or sealant.

[0073] In some alternative embodiments, the temperature measuring sensor described above, further comprises:

[0074] The wave-proof sleeve 9 is sleeved on the compensation wire 7;

[0075] The lead wire clamp 10 is connected to the adapter sleeve 8, and clamps the wave-proof sleeve 9.

[0076] In some alternative embodiments, the temperature measuring sensor described above, further comprises:

[0077] The pin 11 is connected to the end of the compensation wire 7 away from the lead wire of the thermocouple 2, and can be connected to an external data acquisition device.

[0078] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0079] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings. It should be understood by those skilled in the art that the protection scope of the present application is obviously not limited to these specific embodiments. Without deviating from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the related technical features. The technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A temperature measuring sensor, characterized by The temperature measuring sensor comprises: an outer support rod (1) having an outer communication channel in it, the side wall of which has an outer flow channel and an outer flow hole; the outer communication channel extends to one end of the outer support rod (1) and extends to the outer flow hole; the outer flow channel is located between the other end of the outer support rod (1) and the outer flow hole; a thermocouple (2) arranged in the outer flow hole, the lead wire of which is led out through the outer communication channel; the cross section of the outer flow channel is arc-shaped and surrounds the outer flow hole; an inner support rod (4) having an inner communication channel in it, one end of which extends into the outer flow hole through the outer communication channel, and the side wall of the end has an inner flow hole; the inner communication channel extends to the other end of the inner support rod (4) and extends to the inner flow hole; the thermocouple (2) is arranged in the inner flow hole, and the lead wire thereof is led out through the inner communication channel; a radiation protection cover (5) connected to the inner support rod (4) covers the inner flow hole and has a flow-through hole thereon; the flow-through hole communicates with the outer flow hole and the inner flow hole; the temperature measuring sensor further comprises: a ceramic tube (3) sleeved on the lead wire of the thermocouple (2) and led out through the communication channel; the outer communication channel is step-shaped; the outer wall of the end of the inner support rod (4) away from the inner flow hole has a step-shaped protrusion; the temperature measuring sensor further comprises: a pressure cap (6) having a lead wire hole therein and being screwed into the outer communication channel to press on the inner support rod (4) so that the step-shaped protrusion abuts against the step part of the outer communication channel; the lead wire of the thermocouple (2) is led out through the lead wire hole; a compensation lead wire (7) is connected to the lead wire of the thermocouple (2); the temperature measuring sensor further comprises: an adapter barrel (8) having one end screwed into the lead wire hole and sleeved on the connection part of the lead wire of the thermocouple (2) and the compensation lead wire (7), and cement and / or sealant are filled in the adapter barrel (8).

2. The temperature measuring sensor according to claim 1, wherein the outer wall of the end of the outer support rod (1) away from the outer flow channel has an annular mounting edge.

3. The temperature measuring sensor according to claim 2, further comprising: a wave-proof sleeve (9) sleeved on the compensation lead wire (7); a lead wire clamp (10) connected to the adapter barrel (8) and clamping the wave-proof sleeve (9).

4. The temperature measuring sensor according to claim 3, further comprising: a pin (11) connected to the end of the compensation lead wire (7) away from the lead wire of the thermocouple (2). ​ ​

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