Method for repairing a temperature sensor

Abstract

The application discloses a repairing method of a temperature sensor, relates to the technical field of temperature sensor repairing, and aims to solve the problem that the serious wear of a threaded joint of a temperature sensor will affect the normal work of the temperature sensor. The temperature sensor comprises a sensor body and a threaded joint connected to the sensor body, and the threaded joint comprises a worn area and an unworn area. The repairing method comprises the following steps: repairing the worn area by means of surfacing welding to obtain a repaired area, and making the radial dimension of the repaired area greater than a preset dimension, wherein the preset dimension is the maximum diameter of the thread of the area outside the repaired area; and performing cutting treatment on the surface layer material of the repaired area to make the radial dimension of the repaired area equal to the preset dimension.

Description

Technical Field

[0001] This application relates to the field of temperature sensor repair technology, and in particular to a method for repairing a temperature sensor. Background Technology

[0002] A temperature sensor (T3 temperature sensor) is typically installed on the compressor of a gas generator. This sensor detects the exhaust temperature of the compressor. The temperature sensor has a threaded connector, and the compressor has a mounting bracket with a through-hole. The threaded connector of the temperature sensor passes through the through-hole, and then a nut is tightened on the threaded connector to secure the temperature sensor to the compressor.

[0003] When a gas generator is operating, the compressor typically vibrates, causing the threaded connector of the temperature sensor to continuously collide and rub against the mounting bracket, resulting in wear on the threaded connector. Severe wear on the threaded connector can affect the normal operation of the temperature sensor. Summary of the Invention

[0004] The purpose of this application is to provide a method for repairing a temperature sensor, which aims to solve the problem that severe wear of the threaded joint of the temperature sensor will affect the normal operation of the temperature sensor.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a method for repairing a temperature sensor. The temperature sensor includes a sensor body and a threaded connector connected to the sensor body. The threaded connector includes a worn area and an unworn area.

[0007] Repair methods include:

[0008] The worn area is repaired by welding to obtain a repair area, and the radial dimension of the repair area is greater than the preset dimension, which is the maximum diameter of the thread in the area outside the repair area.

[0009] The surface material of the repair area is cut to make the radial dimension of the repair area equal to the preset dimension.

[0010] The temperature sensor repair method provided in this application repairs the worn area by welding. The molten material from the welding wire replenishes the worn material in the threaded joint, thus transforming the repaired portion of the threaded joint into a repair area. Furthermore, during the welding process, the radial dimension of the resulting repair area is made larger than a preset dimension. Then, the surface material of the repair area is cut to equalize the radial dimension of the repair area with the preset dimension. This allows the radial dimension of the repaired threaded joint to be closer to its pre-wear size. Consequently, the connection between the repaired threaded joint and the mounting bracket is more stable, ensuring the accuracy of temperature detection and guaranteeing the normal operation of the temperature sensor.

[0011] In some embodiments, repairing the worn area by welding includes repairing the worn area by cold welding.

[0012] In some embodiments, repairing the worn area by welding also includes: welding the worn area with welding wire of the same material as the threaded joint.

[0013] In some embodiments, cutting the surface material of the repair area includes: fixing a temperature sensor to a machine tool, and cutting the surface material of the repair area with the cutting head of the machine tool until the radial dimension of the repair area is equal to a preset dimension.

[0014] In some embodiments, the repair method further includes: grinding the repaired area after cutting to remove burrs from the repaired area.

[0015] In some embodiments, the repair method further includes tapping the threaded joint with a die of the same specification as the thread in the unworn area, so that the thread in the repaired area is the same specification as the thread in the unworn area.

[0016] In some embodiments, the repair method further includes: cleaning the surface of the worn area before repairing the worn area.

[0017] In some embodiments, cleaning the surface of the worn area includes:

[0018] The surface of the worn area is polished to remove dirt from the worn area;

[0019] The surface of the worn area after grinding is blown away to remove the residue produced during grinding.

[0020] In some embodiments, the temperature sensor further includes a limiting ring and a buffer ring. The limiting ring surrounds the sensor body and is connected to the sensor body. Along the axial direction of the limiting ring, a threaded joint is located on one side of the limiting ring, and the buffer ring is located on the side of the limiting ring facing the threaded joint.

[0021] The repair methods also include:

[0022] Remove the buffer ring from the limit ring before repairing the worn area;

[0023] After the threaded joint is repaired, the buffer ring is installed onto the limit ring.

[0024] In some embodiments, mounting the buffer ring onto the limiting ring includes: bonding the buffer ring onto the limiting ring by a vulcanization process. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a partial structural schematic diagram of a gas generator provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 An exploded structural diagram showing the connection relationship between the temperature sensor and the mounting bracket in the gas generator shown.

[0028] Figure 3 for Figure 2 The diagram shows the structure of the temperature sensor after wear.

[0029] Figure 4 A schematic flowchart illustrating a method for repairing a temperature sensor provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the process for cleaning the surface of a worn area, provided in an embodiment of this application.

[0031] Figure label:

[0032] 10. Gas generator;

[0033] 1. Air compressor;

[0034] 2. Install the bracket; 21. Install the through hole;

[0035] 3. Temperature sensor; 31. Sensor body; 32. Limiting ring; 321. Mounting slot; 33. Threaded connector; 34. Buffer ring;

[0036] 4. Nuts. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0042] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] Please see Figure 1 , Figure 1 This is a partial structural schematic diagram of a gas generator provided in an embodiment of this application. The gas generator 10 needs to supply air into the combustion chamber to provide oxygen to the fuel in the combustion chamber, thereby facilitating the combustion of the fuel in the combustion chamber.

[0044] The gas generator 10 typically includes a compressor 1. The compressor 1 is used to compress the air entering the gas generator 10 to increase the air pressure, thereby increasing the air density and improving the cycle thermal efficiency.

[0045] The gas generator 10 also includes a mounting bracket 2 and a temperature sensor 3. The mounting bracket 2 is connected to the exhaust side of the compressor 1, and the temperature sensor 3 is mounted on the mounting bracket 2 to detect the exhaust temperature of the compressor 1.

[0046] Please see Figure 2 , Figure 2 for Figure 1 The diagram shows an exploded view of the connection between the temperature sensor 3 and the mounting bracket 2 in the gas generator 10. The temperature sensor 3 typically includes a sensor body 31, a retaining ring 32, and a threaded connector 33 connected to the sensor body 31. The retaining ring 32 surrounds the sensor body 31 and is connected to it. Along the axial direction of the retaining ring 32, the threaded connector 33 is located on one side of the retaining ring 32.

[0047] The mounting bracket 2 has a mounting through hole 21. The threaded connector 33 of the temperature sensor 3 usually passes through the mounting through hole 21, and then the nut 4 is tightened on the threaded connector 33. The nut 4 and the limiting ring 32 clamp the mounting bracket 2 from opposite sides to realize the installation of the temperature sensor 3 on the mounting bracket 2.

[0048] The threaded connector 33 can be a rod-shaped structure or a tubular structure, and the outer circumferential surface of the rod-shaped structure or the tubular structure is provided with an external thread that matches the nut 4.

[0049] Please see Figure 3 , Figure 3 for Figure 2 The diagram shows the structure of the temperature sensor 3 after wear. The temperature sensor 3 also includes a buffer ring 34. The buffer ring 34 is located on the side of the limiting ring 32 facing the threaded joint 33. For example, the limiting ring 32 has a mounting groove 321, which is recessed from the side surface of the limiting ring 32 facing the threaded joint 33 away from the threaded joint 33, and extends circumferentially along the threaded joint 33. The buffer ring 34 is located within the mounting groove 321.

[0050] When the temperature sensor 3 is connected to the mounting bracket 2, the buffer ring 34 is located between the limiting ring 32 and the mounting bracket 2, and can contact both the limiting ring 32 and the mounting bracket 2 to buffer the space between the limiting ring 32 and the mounting bracket 2.

[0051] The buffer ring 34 can be made of flexible materials such as rubber, silicone, or latex.

[0052] When the gas generator 10 is operating, the compressor 1 typically vibrates, causing the temperature sensor 3 and mounting bracket 2 to vibrate. This leads to friction between the threaded connector 33 and the inner wall of the mounting hole 21, resulting in wear on the threaded connector 33. Furthermore, the vibration of the temperature sensor 3 and mounting bracket 2 can also cause the connection between the nut 4 and the threaded connector 33 to loosen, further exacerbating the friction between the threaded connector 33 and the inner wall of the mounting hole 21, and further accelerating the wear of the threaded connector 33.

[0053] Since the portion of the threaded connector 33 located within the mounting through hole 21 rubs against the mounting bracket 2, the wear location of the threaded connector 33 is typically the portion within the mounting through hole 21, meaning the end of the threaded connector 33 facing the limiting ring 32 is prone to wear. For ease of description, the worn area in the threaded connector 33 (i.e., the area facing the limiting ring 32) is named the wear area (e.g., ...). Figure 3 The area P1 shown in the figure is designated as the unworn area (the area other than the worn area) in the threaded joint 33. Figure 3 (P2 region shown in the image).

[0054] For example, the portion of the threaded connector 33 located within the mounting through hole 21 of the mounting bracket 2 may be threaded, may not be threaded, or may be partially threaded.

[0055] Severe wear of the threaded connector 33 can cause unstable connection of the temperature sensor 3 on the mounting bracket 2, thus affecting the accuracy of temperature detection by the temperature sensor 3. Furthermore, severe wear of the threaded connector 33 may expose the internal cables of the temperature sensor 3, posing a risk of electrical leakage and potentially causing the temperature sensor 3 to fail and become unusable.

[0056] Based on this, please refer to Figure 4 , Figure 4 This is a flowchart illustrating a method for repairing a temperature sensor 3 according to an embodiment of this application. This application provides a method for repairing a temperature sensor 3. The method for repairing the temperature sensor 3 includes:

[0057] S1: The worn area is repaired by welding to obtain a repair area, and the radial dimension of the repair area is greater than the preset dimension, which is the maximum diameter of the thread in the area outside the repair area.

[0058] It should be noted that during the welding process on the worn area, due to welding errors, the portion of the unworn area close to the worn area may also be covered by welding wire and welded. Therefore, the surface area of ​​the repaired area is usually larger than that of the worn area. The threads in the area outside the repaired area mainly mate with the nut 4 and will not rub against the inner wall of the mounting through hole 21, and can be considered as unworn.

[0059] The maximum diameter of the thread in the area outside the repair area is the outer diameter of the thread in that area.

[0060] S2: Cut the surface material of the repair area to make the radial dimension of the repair area equal to the preset dimension.

[0061] It should be noted that if the difference between the radial dimension of the repair area and the preset dimension is within the preset error range, the radial dimension of the repair area can be considered equal to the preset dimension. The preset error range can be greater than or equal to 0.01mm and less than or equal to 0.05mm; for example, the preset error can be 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, etc.

[0062] Repairing worn areas through welding involves using molten welding material to replenish the worn material in the threaded joint 33, thus creating a repaired area. During the welding process, the radial dimension of the repaired area is made larger than a preset dimension. Then, the surface material of the repaired area is cut to equalize its radial dimension. This ensures the repaired threaded joint 33 has a radial dimension closer to its pre-wear size, resulting in greater stability when connected to the mounting bracket 2 and guaranteeing the accuracy of temperature detection by the temperature sensor 3. Furthermore, it avoids exposing the internal cables of the temperature sensor 3, reducing the risk of leakage and ensuring its normal operation.

[0063] In addition, by first making the radial dimension of the repair area larger than the preset dimension, and then cutting the repair area until the radial dimension of the repair area is equal to the preset dimension, the surface unevenness of the repair area caused by welding errors can be reduced, so as to further ensure that the dimensions of the repaired threaded joint 33 are closer to the dimensions before wear, and improve the repair accuracy.

[0064] In some embodiments, repairing the worn area by welding includes repairing the worn area by cold welding. The cold welding method can employ high-frequency electrical spark discharge (EDD) or cold wire plasma arc welding, etc.

[0065] Since the cold welding method is used to repair the worn area at a lower temperature, it will not damage the cables or electronic components inside the temperature sensor 3. Therefore, the welding process can be performed directly on the temperature sensor 3 without having to remove the threaded connector 33 separately for repair. This makes it easier to repair the temperature sensor 3, improves repair efficiency, and will not damage other parts of the temperature sensor 3.

[0066] In other examples, thermal welding can also be used to repair worn areas. For example, manual arc welding or gas shielded welding can be used for welding. In this case, the threaded connector 33 needs to be removed from the temperature sensor 3 for repair to avoid damaging the cables and electronic components inside the temperature sensor 3.

[0067] In some embodiments, repairing the worn area by welding also includes: welding the worn area with welding wire of the same material as the threaded connector 33.

[0068] Using welding wire of the same material as the threaded connector 33 to perform overlay welding on the worn area can make the welding wire melt and bond more firmly with the threaded connector 33, so that the performance of the repaired threaded connector 33 is closer to that of the threaded connector 33 before wear, thus ensuring the performance of the repaired threaded connector 33 and the performance of the temperature sensor 3.

[0069] For example, if the threaded connector 33 is made of 321 stainless steel, then the welding wire should be a special welding wire for 321 stainless steel, such as AMS5680.

[0070] In some embodiments, cutting the surface material of the repair area includes: fixing the temperature sensor 3 to a machine tool, and cutting the surface material of the repair area with the cutting head of the machine tool until the radial dimension of the repair area is equal to a preset dimension.

[0071] In other words, when cutting the surface material of the repair area, multiple cuts are required. Each cut must control the feed rate to be less than the difference between the radial dimension of the repair area before cutting and the preset dimension. This allows for multiple cuts of the surface material of the repair area until the radial dimension of the repair area equals the preset dimension. This reduces errors caused by cutting, ensuring that the radial dimension of the repair area after cutting is closer to its pre-wear size, thus guaranteeing the performance of the repaired temperature sensor 3.

[0072] For example, the machine tool can be a lathe, milling machine, grinding machine, etc.

[0073] In some embodiments, the repair method for the temperature sensor 3 further includes: grinding the repaired area after cutting to remove burrs. Grinding the repaired area to remove burrs makes the repaired area smoother and prevents scratches on the operator's skin during the installation of the temperature sensor 3.

[0074] For example, the surface of the repaired area can be polished using pneumatic polishing tools such as pneumatic grinders and pneumatic files. Alternatively, it can be manually polished using sandpaper, grinding discs, etc.

[0075] In some embodiments, when welding is performed on the worn area, due to welding errors, the portion of the unworn area close to the worn area may also be welded. This would damage the threads of the welded portion in the unworn area, which may prevent the nut 4 from being tightened to contact the mounting bracket 2, thus affecting the stability of the temperature sensor 3 connected to the mounting bracket 2.

[0076] Based on this, the repair method for temperature sensor 3 also includes: using a die of the same specification as the thread in the unworn area to tap the threaded connector 33, so that the thread in the repaired area is the same as the thread in the unworn area.

[0077] In this way, the threads formed in the repaired area have the same specifications as those in the unworn area, allowing the original nut 4 to be used to tighten the repaired threaded joint 33 without replacing other parts, thus saving costs. Furthermore, when the temperature sensor 3 is connected to the mounting bracket 2, the nut 4 can be tightened until it contacts the mounting bracket 2, thereby improving the stability of the connection between the temperature sensor 3 and the mounting bracket 2.

[0078] In some embodiments, the repair method for the temperature sensor 3 further includes: cleaning the surface of the worn area before repairing it. This prevents contaminants on the surface of the worn area from affecting the tightness of the weld wire's connection with the threaded joint 33 after melting, thereby improving the repair quality of the threaded joint 33.

[0079] In some embodiments, please refer to Figure 5 , Figure 5 This is a schematic diagram illustrating the process of cleaning the surface of a worn area according to an embodiment of this application. Cleaning the surface of the worn area includes:

[0080] S10: Grind the surface of the worn area to remove dirt from the surface of the worn area.

[0081] For example, the surface of the worn area can be polished with a stainless steel wire brush, or with sandpaper, grinding wheel, etc.

[0082] S20: Blow the surface of the worn area after grinding to remove the residue generated during grinding.

[0083] For example, compressed air can be used to blow away the surface of the worn area after grinding, removing any grinding residue. High-pressure nitrogen can also be used to blow away the surface of the worn area after grinding.

[0084] The method involves first grinding the surface of the worn area, and then blowing away the ground surface to remove contaminants. This method is simple and easy to implement. Furthermore, it is more cost-effective than using chemical solvents for cleaning.

[0085] In other embodiments, chemical solvents can be used to spray and wash the worn area to remove oxides, oil, and other contaminants from the surface of the worn area. For example, sodium hydroxide solution, ammonia, hydrochloric acid, and acetic acid can be used to remove oxides, while acetone and gasoline can be used to remove oil.

[0086] In some embodiments, the repair method further includes removing the buffer ring 34 from the retaining ring 32 before repairing the worn area. After the threaded joint 33 is repaired, the buffer ring 34 is installed onto the retaining ring 32.

[0087] This avoids damage to the buffer ring 34 when welding or cutting the worn area, so the original buffer ring 34 can continue to be used, thus avoiding increased costs due to replacement of the buffer ring 34.

[0088] The buffer ring 34 can be removed from the limiting ring 32 and installed onto the limiting ring 32 manually.

[0089] In some embodiments, mounting the buffer ring 34 onto the limiting ring 32 includes bonding the buffer ring 34 to the limiting ring 32 by a vulcanization process. For example, the buffer ring 34 is bonded within the mounting groove 321.

[0090] This makes the connection between the buffer ring 34 and the limiting ring 32 more secure. When the temperature sensor 3 is connected to the mounting bracket 2, the buffer ring 34 can be prevented from deviating, thereby improving the fitting accuracy of the temperature sensor 3, the buffer ring 34 and the mounting bracket 2.

[0091] In some examples, the buffer ring 34 can be bonded to the retaining ring 32 using a vulcanizing adhesive. For example, the vulcanizing adhesive can be RTV adhesive (room temperature vulcanizing silicone rubber). RTV adhesive is a silicone elastomer that can be cross-linked and vulcanized at room temperature, allowing the buffer ring 34 to be bonded to the retaining ring 32 without heating or pressure, which is convenient and inexpensive.

[0092] In other examples, the buffer ring 34 can also be bonded to the limiting ring 32 by other vulcanization processes, such as peroxide vulcanization, resin vulcanization, etc.

[0093] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0094] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for repairing a temperature sensor, characterized in that, The temperature sensor includes a sensor body and a threaded connector connected to the sensor body, the threaded connector including a worn area and an unworn area; The repair method includes: The worn area is repaired by welding to obtain a repair area, and the radial dimension of the repair area is greater than a preset dimension, which is the maximum diameter of the thread in the area outside the repair area. The surface material of the repair area is cut to make the radial dimension of the repair area equal to the preset dimension.

2. The repair method according to claim 1, characterized in that, The repair of the worn area by welding includes repairing the worn area by cold welding.

3. The repair method according to claim 1, characterized in that, The repair of the worn area by welding also includes: The worn area is overlaid with welding wire of the same material as the threaded joint.

4. The repair method according to claim 1, characterized in that, The cutting process of the surface material of the repair area includes: fixing the temperature sensor to a machine tool, and cutting the surface material of the repair area with the cutting head of the machine tool until the radial dimension of the repair area is equal to the preset dimension.

5. The repair method according to claim 1, characterized in that, The repair method further includes: grinding the repaired area after cutting to remove burrs from the repaired area.

6. The repair method according to any one of claims 1-5, characterized in that, The repair method also includes: The threaded joint is tapped using a die of the same specification as the thread in the unworn area, so that the thread in the repaired area is the same specification as the thread in the unworn area.

7. The repair method according to any one of claims 1-5, characterized in that, The repair method further includes: cleaning the surface of the worn area before repairing it.

8. The repair method according to any one of claims 1-5, characterized in that, The surface cleaning treatment of the worn area includes: The surface of the worn area is polished to remove dirt from the surface of the worn area; The surface of the worn area after grinding is blown away to remove the residue produced during grinding.

9. The repair method according to any one of claims 1-5, characterized in that, The temperature sensor further includes a limiting ring and a buffer ring. The limiting ring surrounds the sensor body and is connected to the sensor body. Along the axial direction of the limiting ring, the threaded joint is located on one side of the limiting ring, and the buffer ring is located on the side of the limiting ring facing the threaded joint. The repair method also includes: Before repairing the worn area, remove the buffer ring from the limiting ring; After the threaded joint is repaired, the buffer ring is installed onto the limiting ring.

10. The repair method according to claim 9, characterized in that, The step of installing the buffer ring onto the limiting ring includes: bonding the buffer ring onto the limiting ring through a vulcanization process.

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