Temperature test sensing part assembly
By designing independent temperature measurement channels and wrap-around cooling water circuits in the temperature test sensing part assembly, physically isolating the temperature measurement unit assembly and cooling water, the problem of large test errors in traditional water-cooled sensing part under high temperature conditions is solved, and higher temperature resistance and lower test errors are achieved.
Patent Information
- Application Number
- CN202311508228.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-13
- Publication Date
- 2025-05-13
AI Technical Summary
The traditional water-cooled sensing part is difficult to meet the combustion chamber outlet temperature testing requirements under high temperature conditions, and the cooling water introduces a large temperature measurement error to the strong cooling of the temperature measuring element.
A temperature test sensing component is designed, using multiple independent temperature measurement channels and wrap-around cooling water circuits to physically isolate the temperature measurement unit assembly from the cooling water to reduce thermal conductivity errors.
The temperature resistance of the sensing part is improved and the test error is reduced. The temperature measurement error can be increased from the traditional ±2% or above to within ±1%, while improving the cooling effect and being able to withstand the direct erosion of 2300K gas.
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Figure CN119984543A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of aero-engine combustion chamber outlet temperature testing, and in particular to a temperature testing sensing part assembly. Background Art
[0002] The total temperature test of the combustion chamber outlet of an aircraft engine is an important test item to measure the performance index of the combustion chamber. Since the maximum temperature of the combustion chamber outlet of a modern aircraft engine has exceeded 2000K, the direct thermocouple measurement method must rely on a water cooling system to ensure the stable operation of the test sensing part.
[0003] The traditional water-cooled sensing part adopts a welded shell design with a single-layer cooling water channel. The structure is simple and the cooling effect can meet the combustion chamber temperature test requirements below 1800K, but it is difficult to meet the combustion chamber test requirements with higher outlet temperatures. At the same time, due to the strong cooling of the shell and temperature measuring elements by the cooling water, a large temperature measurement error is introduced, resulting in the test data cannot be used directly without correction, but the correction algorithm has always been a major problem plaguing the industry.
[0004] The defects of large test errors and insufficient high temperature resistance in traditional water-cooled sensing parts are problems that need to be solved urgently. Summary of the invention
[0005] The object of the present invention is to provide a temperature test sensing part assembly, which can improve the temperature resistance of the high sensing part and reduce the test error.
[0006] To achieve the above-mentioned purpose, the temperature test sensing component comprises:
[0007] The outer shell has an inlet side and an outlet side, and the inner part of the outer shell is configured with:
[0008] at least one temperature measurement channel extending from the inlet side to the outlet side;
[0009] at least one water inlet channel, disposed near the temperature measuring channel; and
[0010] at least one drainage channel, communicating with the water inlet channel at the outlet side;
[0011] a water inlet pipe, connected to the water inlet channel at the inlet side;
[0012] a drain pipe communicating with the drain channel at the outlet side; and
[0013] The temperature measuring unit assembly comprises a temperature measuring unit and a shielding cover, wherein the shielding cover is arranged in the temperature measuring channel at the outlet side, and the temperature measuring unit is arranged in the temperature measuring channel and penetrates the shielding cover.
[0014] In one or more embodiments, there are a plurality of temperature measuring channels, and the water inlet channels are respectively arranged between two adjacent temperature measuring channels and between the temperature measuring channel and the outer shell.
[0015] In one or more embodiments, the drainage channel is arranged in a circular manner along the circumference of the outer shell and around the outer peripheries of the plurality of temperature measurement channels and the plurality of water inlet channels.
[0016] In one or more embodiments, the outer shell has an inlet water collecting chamber on the inlet side, the plurality of water inlet channels are respectively connected to the inlet water collecting chamber, and the water inlet pipe is connected to the inlet water collecting chamber.
[0017] In one or more embodiments, the outer shell has an outlet water collecting chamber on the inlet side, the plurality of drainage channels are respectively connected to the outlet water collecting chamber, and the drainage pipe is connected to the outlet water collecting chamber.
[0018] In one or more embodiments, the outer shell is rod-shaped, and the plurality of water inlet channels, the plurality of drainage channels, and the plurality of temperature measurement channels extend respectively along the extension direction of the outer shell.
[0019] In one or more embodiments, a first exhaust hole is provided on the shielding cover, and a second exhaust hole is provided on the outer shell, and the second exhaust hole connects the temperature measurement channel with the outside of the outer shell.
[0020] In one or more embodiments, a mounting portion is disposed outside the outer shell.
[0021] In one or more embodiments, the temperature measuring unit is an armored thermocouple.
[0022] In one or more embodiments, the outer shell is an integral piece, the temperature measuring channel is configured as a threaded hole on the outlet side, and the shielding cover is threadedly connected to the threaded hole.
[0023] The beneficial effects of the present invention are:
[0024] During the temperature measurement process, the temperature test sensing part assembly with this configuration allows cooling water to flow in from the water inlet pipe, and then be discharged from the drainage pipe after passing through the water inlet channel and the drainage channel. The sensing part shell along the way is cooled by cooling water so that it can work stably. At the same time, during the cooling process, since the temperature measurement channel is an independent channel relative to the water inlet channel and the drainage channel, the temperature measurement unit assembly arranged in the temperature measurement channel can be physically isolated from the cooling water located in the water inlet channel and the drainage channel, thereby avoiding the cooling water from causing a strong cooling of the temperature measurement unit assembly and causing a huge thermal conductivity error.
[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:
[0027] Figure 1 Shows a stereoscopic schematic diagram of some embodiments of the temperature test sensing part assembly;
[0028] Figure 2 A half-section schematic diagram of the inlet side of some embodiments of the temperature test sensing part assembly is shown;
[0029] Figure 3 A half-section schematic diagram of the outlet side of some embodiments of the temperature test sensing part assembly is shown;
[0030] Figure 4 A cross-sectional schematic diagram showing some embodiments of the temperature test sensing part assembly according to the present invention is shown;
[0031] Figure 5 A partial schematic diagram of the outlet side of some embodiments of the temperature test sensing part assembly according to the present invention is shown. DETAILED DESCRIPTION
[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0034] In the existing water-cooled temperature measuring sensing part, the temperature measuring element adopts an exposed precious metal thermocouple wire (generally a B-type or S-type thermocouple), the front end of which is in direct contact with the gas, and the rear end is in direct contact with the cooling water in the shell. During operation, the cooling water reduces the shell temperature of the sensing part, ensuring the strength of the sensing part. At the same time, it also causes strong cooling of the precious metal temperature measuring element in the sensing part, resulting in a huge thermal conductivity error in the temperature test. The temperature measurement error can reach the order of 100°C, and it is difficult to implement effective temperature correction.
[0035] In order to solve the above problems, according to some embodiments of the present application, a temperature test sensing component is provided. Figure 1 The three-dimensional schematic diagram of some embodiments of the temperature test sensing component is shown. The temperature test sensing component includes an outer shell 1, a water inlet pipe 2, a drain pipe 3 and a temperature measurement unit component 4. The outer shell 1 has an inlet side 101 and an outlet side 102. Figure 2 A half-section schematic diagram of the inlet side of some embodiments of the temperature test sensing part assembly is shown. Figure 3 A half-section schematic diagram of the outlet side of some embodiments of the temperature test sensing part assembly is shown. Figure 4 A cross-sectional schematic diagram of some embodiments of the temperature test sensing part assembly according to the present invention is shown.
[0036] See also Figures 2 to 3 As shown in the details, at least one temperature measuring channel 11, at least one water inlet channel 12 and at least one drainage channel 13 are arranged in the outer shell 1. The temperature measuring channel 11 extends from the inlet side 101 to the outlet side 102, and the water inlet channel 12 is arranged close to the temperature measuring channel 11. At the same time, the drainage channel 13 is connected to the water inlet channel 12 at the outlet side 102, so that a circulating water path arranged around the outer periphery of the temperature measuring channel 11 is formed in the outer shell 1. At the same time, the flow path of the cooling water in the outer shell 1 forms a 180° return flow path at the outlet side 102.
[0037] The temperature measuring unit assembly 4 includes a temperature measuring unit 41 and a shielding cover 42 . The shielding cover 42 is connectedly arranged in the temperature measuring channel 11 at the outlet side 102 . The temperature measuring unit 41 is arranged in the temperature measuring channel 11 and is arranged through the shielding cover 42 at the outlet side 102 .
[0038] When measuring temperature, taking the outlet temperature test requirement of the combustion chamber test piece as an example, the outlet side 102 of the outer shell 1 is extended into the flow channel to be measured, so that the detection end of the temperature measuring unit 41 located in the shielding cover 42 is located in the middle of the combustion chamber outlet annular cavity, and the high-temperature combustion gas enters through the annular gap between the temperature measuring unit 41 and the shielding cover 42, and the temperature measuring unit 41 measures the temperature of the high-temperature combustion gas.
[0039] In order to ensure the stable operation of the sensing component, during the temperature measurement process, cooling water is introduced from the water inlet pipe 2, and is discharged from the drain pipe 3 after passing through the water inlet channel 12 and the drain channel 13. The shell 1 along the way is cooled by cooling water so that it can work stably. At the same time, during the cooling process, since the temperature measuring channel 11 is an independent channel relative to the water inlet channel 12 and the drain channel 13, the temperature measuring unit component 4 arranged in the temperature measuring channel 11 can be physically isolated from the cooling water located in the water inlet channel 12 and the drain channel 13, thereby avoiding the cooling water from causing a strong cooling of the temperature measuring unit component 4 and causing a huge thermal conductivity error. Specifically, the above-mentioned physical isolation is achieved by forming the wall of the temperature measuring channel 11 in the outer shell 1.
[0040] In the description of the embodiments of the present application, “plurality” means more than two (including two), unless otherwise clearly and specifically defined.
[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0042] In some embodiments of the temperature test sensing component, there are multiple temperature measurement channels 11, and a water inlet channel 12 is provided between two adjacent temperature measurement channels 11 and between the temperature measurement channel 11 and the outer shell 1. Figures 2 to 4 In the embodiment shown in the figure, there are three temperature measurement channels 11 and four water inlet channels 12, which are respectively arranged between two temperature measurement channels 11 and between the temperature measurement channels 11 and the outer shell 1. In other embodiments different from those shown in the figure, the number of temperature measurement channels 11 can be increased or decreased as needed to meet the specific combustion chamber test piece outlet temperature test requirements. With such an arrangement, a sufficient number of temperature measurement unit assemblies 4 can be arranged in the outer shell 1 to meet the requirements for the number of measurement points.
[0043] In some embodiments of the temperature test sensing component, for example Figure 4 In the cross section shown in , the drainage channel 13 is arranged along the circumference of the outer shell 1, and is arranged in a ring around the outer periphery of the multiple temperature measurement channels 11 and the multiple water inlet channels 12, thereby forming an inner and outer layer design. The water flows in from the inner layer, evenly wraps the temperature measurement channel 11, and after the convection impact at the front end of the sensing part, it returns 180° and flows out from the outer layer, thereby improving the heat exchange effect of the sensing part. At the same time, the drainage channel 13 is arranged in a ring to maximize the contact area with the outer shell, thereby obtaining a better cooling effect.
[0044] In some embodiments of the temperature test sensing component, Figure 2 As shown, the outer shell 1 has an inlet water collecting chamber 120 on the inlet side 101, and multiple water inlet channels 12 are respectively connected to the inlet water collecting chamber 120, and the water inlet pipe 2 is connected to the inlet water collecting chamber 120, so that after the cooling water enters through the water inlet pipe 2, it is distributed to the multiple water inlet channels 12 through the inlet water collecting chamber 120. In the embodiment shown in the figure, the water inlet pipe 2 is connected to the inlet water collecting chamber 120. In some embodiments different from those shown in the figure, the water inlet pipe 2 can also be other suitable numbers.
[0045] In some embodiments of the temperature test sensing component, Figure 2 As shown, the outer shell 1 has an outlet water collecting chamber 130 at the inlet side 101, and a plurality of drainage channels 13 are respectively connected to the outlet water collecting chamber 130, and the drainage pipe 3 is connected to the outlet water collecting chamber 130. After the cooling water flowing out of the plurality of drainage channels 13 flows into the outlet water collecting chamber 130, it is discharged through the drainage pipe 3. In the embodiment shown in the figure, there are two drainage pipes 3 connected to the outlet water collecting chamber 130. In some embodiments different from those shown in the figure, the drainage pipes 3 may also be other suitable numbers.
[0046] In some embodiments of the temperature test sensing component, Figure 2 as well as Figure 3 As shown, the outer shell 1 is rod-shaped, and a plurality of water inlet channels 12, a plurality of drainage channels 13, and a plurality of temperature measurement channels 11 extend respectively along the extension direction of the outer shell 1, so as to maintain a relatively constant distance between each other, thereby ensuring the consistency of data of each temperature measurement unit assembly 4 arranged in the plurality of temperature measurement channels 11. In a specific embodiment, the distance between each temperature measurement channel 11 and the water inlet channel 12 is the same, ensuring the same cooling effect at each measuring point, and avoiding temperature measurement differences caused by different thermal conductivity errors.
[0047] In some specific embodiments, the areas of the inlet and outlet channels are substantially equal to ensure smooth inflow and outflow of water.
[0048] Figure 5The partial schematic diagram of the outlet side of some embodiments of the temperature test sensing part assembly is shown. In some embodiments of the temperature test sensing part assembly, a first exhaust hole 51 is provided on the shielding cover 42, and a second exhaust hole 52 is provided on the outer shell 1. The second exhaust hole 52 connects the temperature measurement channel 11 with the outside of the outer shell 1. After the high-temperature gas enters from the free end of the shielding cover 42, a part of it is discharged from the first exhaust hole 51, and the remaining part of the high-temperature gas will continue to flow along the temperature measurement unit 41 for a section until it is discharged from the second exhaust hole 52. By setting the second exhaust hole 52, it is possible to allow the airflow to flow along the temperature measurement unit 41 from the first exhaust hole 51 to the second exhaust hole 52 for an additional distance, thereby increasing the infiltration length of the temperature measurement unit 41 in the high-temperature airflow, and increasing the aspect ratio of the temperature measurement unit 41. The aspect ratio can be more than 20, thereby greatly reducing the influence of thermal conductivity errors. In some specific embodiments, the area settings of the first exhaust hole 51 and the second exhaust hole 52 are obtained by numerical simulation calculation to ensure the best test accuracy and cooling effect.
[0049] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.
[0050] In some embodiments of the temperature test sensing component, a mounting portion 6 is provided on the outside of the outer shell 1, and the temperature test sensing component as a whole can be mounted on a component to be tested, such as a combustion chamber test piece, through the mounting portion 6. In a specific embodiment, the mounting portion 6 is a perforated plate, which is fastened and sealed to the test piece by bolts. In a specific embodiment, the mounting portion 6 is machined from a high-temperature alloy material, and the outer shell 1 passes through the mounting portion 6 from top to bottom, and is welded and fixed to the mounting portion 6 by argon arc welding.
[0051] In some embodiments of the temperature test sensing component, the temperature measuring unit 41 is an armored thermocouple. In a specific embodiment, the shell of the armored thermocouple is an iridium-rhenium-plated tube, the couple wire is a tungsten-rhenium couple wire, and the interior is filled with hafnium oxide insulating material and inert gas protection to prevent the couple wire from high-temperature oxidation. The temperature measuring unit 41 is inserted through the head of the outlet side 102 of the outer shell 1, positioned through the step hole, and then sealed at the rear end after passing through the inlet side 101. Depending on the test environment, other precious metal materials can be selected for the armor couple material.
[0052] In some embodiments of the temperature test sensing component, the shielding cover 42 is made of precious metal iridium or ZrB2 ceramics, and other materials with other temperature resistance levels may also be used depending on the use temperature.
[0053] In some embodiments of the temperature test sensing part assembly, the outer shell 1 is an integral part, the temperature measuring channel 11 is configured as a threaded hole on the outlet side 102, and the shielding cover 42 is threadedly connected to the threaded hole. The integral part refers to an integral structure in which the outer shell 1 is formed from the same blank or raw material through an integrated forming process including but not limited to machining, casting or additive manufacturing (3D printing). Such a configuration allows the sensing part to be printed as a whole, reducing the problems of weld cracking and insufficient pressure resistance caused by the welding structure in the traditional assembly process, and can significantly improve the structural strength of the sensing part, improve the water supply pressure bearing capacity, and improve the temperature resistance level and service life. In a specific embodiment, the outer shell 1 is made of GH3536 or other high-temperature alloy materials through 3D printing.
[0054] The temperature test sensing component with the above-mentioned configuration has an independent temperature measurement channel and a thermal conductivity error compensation structure design. Under the premise of not changing the outer dimensions of the traditional water-cooled sensing part, the infiltration length of the temperature measuring element in the gas is greatly increased, and the influence of the thermal conductivity error on the test accuracy is greatly reduced. The test error can be improved from the traditional ±2% to within ±1%. At the same time, the outer shell 1 is configured as an integrated part, which can realize seamless processing and forming of the multi-layer cooling structure, the cooling channel is more optimized, the flow resistance is lower, the cooling effect is better, and the cooling water pressure resistance level is also higher, thereby greatly improving the cooling effect. According to numerical simulation calculations, the sensing part shell using this structural design can withstand the direct flushing of 2300K gas without failure.
[0055] In some specific embodiments, the water inlet pipe 2 and the drain pipe 3 are machined and then connected to the outer shell 1 by welding.
[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.
Claims
1. A temperature test sensing component, characterized in that: include: The outer shell has an inlet side and an outlet side, and the inner part of the outer shell is configured with: at least one temperature measurement channel extending from the inlet side to the outlet side; at least one water inlet channel, disposed near the temperature measuring channel; and at least one drainage channel, communicating with the water inlet channel at the outlet side; a water inlet pipe, connected to the water inlet channel at the inlet side; a drain pipe, communicating with the drain pipe channel at the outlet side; as well as The temperature measuring unit assembly comprises a temperature measuring unit and a shielding cover, wherein the shielding cover is arranged in the temperature measuring channel at the outlet side, and the temperature measuring unit is arranged in the temperature measuring channel and penetrates the shielding cover.
2. The temperature test sensing component according to claim 1, characterized in that: There are a plurality of temperature measuring channels, and the water inlet channels are respectively arranged between two adjacent temperature measuring channels and between the temperature measuring channel and the outer shell.
3. The temperature test sensing component according to claim 2, characterized in that: The drainage channel is arranged along the circumference of the outer shell and is arranged in a circular manner on the outer periphery of the plurality of temperature measurement channels and the plurality of water inlet channels.
4. The temperature test sensing component according to claim 2, characterized in that: The outer shell has an inlet water collecting chamber at the inlet side, the plurality of water inlet channels are respectively connected to the inlet water collecting chamber, and the water inlet pipe is connected to the inlet water collecting chamber.
5. The temperature test sensing component according to claim 2, characterized in that: The outer shell has an outlet water collecting chamber at the inlet side, the plurality of drainage channels are respectively communicated with the outlet water collecting chamber, and the drainage pipe is communicated with the outlet water collecting chamber.
6. The temperature test sensing component according to claim 3, characterized in that: The outer shell is in a rod shape, and the plurality of water inlet channels, the plurality of drainage channels, and the plurality of temperature measurement channels extend respectively along an extension direction of the outer shell.
7. The temperature test sensing component according to claim 1, characterized in that: The shielding cover is provided with a first exhaust hole, and the outer shell is provided with a second exhaust hole, and the second exhaust hole connects the temperature measuring channel with the outside of the outer shell.
8. The temperature test sensing component according to claim 1, characterized in that: A mounting portion is arranged outside the outer shell.
9. The temperature test sensing component according to claim 1, characterized in that: The temperature measuring unit is an armored thermocouple.
10. The temperature test sensing component according to claim 1, characterized in that: The outer shell is an integral part, the temperature measuring channel is configured as a threaded hole at the outlet side, and the shielding cover is threadedly connected to the threaded hole.