A thermocouple temperature measuring protection device for an engine case

Abstract

The utility model discloses a thermocouple temperature measurement protection device for engine nacelle, including thermocouple, the adjustable position's installation sleeve pipe is installed to thermocouple outside, and the installation sleeve pipe outside is connected with the support structure for and nacelle connection and plays the buffering protection effect. The thermocouple temperature measurement protection device for engine nacelle, the heat of nacelle is given the probe end portion of thermocouple through the block, the pole and the heat -conducting wire transmission. Because the pole and the block are equidistant spacing arrangement, can therefore carry out the multi -point temperature detection to the nacelle outer wall, and through the heat conduction mode temperature signal is given the detection end portion of thermocouple. This multi -point temperature detection mode can more comprehensive, accurately reflect the temperature distribution situation of nacelle, and provide more reliable data support for the running state monitoring of engine.

Description

Technical Field

[0001] This utility model relates to the technical field of thermocouple temperature measurement equipment, specifically a thermocouple temperature measurement and protection device for use in engine casing. Background Technology

[0002] In modern engine technology, temperature monitoring is a crucial element in ensuring safe engine operation and optimizing performance. Thermocouples, as a commonly used temperature sensor, are widely used for temperature measurement in high-temperature environments such as engine casings. However, due to the intense vibrations, complex mechanical stresses, and high temperatures generated during engine operation, thermocouples face numerous challenges during use.

[0003] First, the high-temperature and vibration environment inside the engine casing places extremely high demands on the installation and stability of thermocouples. Traditional thermocouple installation methods often struggle to adapt to the complex shape of the casing's outer wall, resulting in insecure installations that are prone to loosening or even damage due to vibration. Furthermore, vibrations generated during engine operation are directly transmitted to the thermocouples, causing signal instability and increased measurement errors during measurement, severely impacting the accuracy and reliability of temperature measurements.

[0004] Secondly, the temperature distribution within the engine casing is complex, and a single temperature measurement point cannot comprehensively reflect the overall temperature condition of the casing. To more accurately monitor the engine's operating status, multi-point temperature detection is required. However, most existing thermocouple temperature measurement devices can only provide single-point measurements and cannot meet the needs of multi-point temperature measurement.

[0005] Furthermore, the protection of thermocouples in high-temperature environments is a problem that urgently needs to be solved. When the casing temperature is too high, the sensitive element inside the thermocouple may be damaged due to excessive thermal shock, causing the temperature measuring device to fail. Although there are some simple thermocouple protection measures at present, these measures often only provide limited protection and cannot effectively prevent thermocouple damage in high-temperature environments.

[0006] To address the aforementioned issues, existing thermocouple temperature measurement devices have significant shortcomings in terms of buffer protection, multi-point temperature measurement, and overheat protection. Therefore, developing a thermocouple temperature measurement and protection device that can adapt to the complex environment of the engine casing is of great significance for improving the safety and reliability of engine operation. Utility Model Content

[0007] This utility model addresses the problem that existing technical solutions are too simplistic by providing a significantly different solution for a thermocouple temperature measurement and protection device for the engine casing, thus resolving the issues raised in the background section.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a thermocouple temperature measurement and protection device for an engine casing, comprising a thermocouple, an adjustable mounting sleeve installed on the outside of the thermocouple, and a support structure connected to the outside of the mounting sleeve for connecting with the casing and providing buffer protection, and an isolation structure for buffer protection and multi-point detection and overheat protection provided on the outer sleeve of the probe end of the thermocouple.

[0009] Preferably, the support structure includes a fixed rod, a sleeve, a first buffer spring, a slider, a slide groove, a support rod, a second buffer spring, and a connecting plate. The outer wall of the mounting sleeve is provided with three sets of fixed rods at equal intervals about the central axis, and the end of each set of fixed rods is located in the corresponding sleeve. A damped first buffer spring is connected between the end of each set of fixed rods and the inner wall of the sleeve. A slider is connected to the outer wall of each sleeve end, and each slider is located in the corresponding slide groove. The slide groove is opened on the support rod, and a damped second buffer spring is connected between the slide groove and the slider. A connecting plate for mounting connection with the outer wall of the casing is rotatably connected to the lower end of each support rod.

[0010] Preferably, each group of fixing rods has at least two, and the fixing rods are arranged at equal intervals along the longitudinal direction of the outer wall of the mounting sleeve.

[0011] Preferably, each group of second buffer springs is provided with two springs, and each group of second buffer springs is symmetrically arranged about both sides of the slider in the slide groove.

[0012] Preferably, the barrier structure includes a sleeve, a third buffer spring, a housing, a support rod, a heat-conducting wire, a shape memory alloy spring, and a stop spring. The probe end of the thermocouple is slidably connected to the sleeve, and a third buffer spring for buffer protection is connected between the sleeve and the thermocouple. The housing is installed at the bottom of the sleeve. Several support rods are densely arranged at equal intervals on the housing, penetrating the upper and lower ends of the housing. Each support rod is rotatably connected to a stop block at its lower end, and a heat-conducting wire is connected between the upper end of each support rod and the probe end of the thermocouple. A shape memory alloy spring is sleeved on the outer wall of the area where each support rod is located inside the housing, and the end of the shape memory alloy spring is connected to the bottom of the inner wall of the housing. A stop spring is connected between the outer wall of the area where each support rod is located inside the housing and the top of the inner wall of the housing. The stop spring is used to keep the stop block tightly against the outer wall of the housing.

[0013] Preferably, the support rod is configured as a cross shape, and the support rod is slidably connected to the housing. The fitting block is configured as a semi-circular structure that facilitates angular rotation, and the planar area of ​​the semi-circular structure is used to increase the fitting area with the outer wall of the casing.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the thermocouple temperature measurement and protection device used at the engine casing,

[0015] Multi-dimensional buffer protection: Through the rotational connection of the support rod and the connecting plate, the angle of the connecting plate can be flexibly adjusted according to the shape of the outer wall of the casing and the installation requirements, thereby achieving a tight fit with the outer wall of the casing and ensuring the stability and reliability of the device installation.

[0016] When the engine is running, the vibrations generated are transmitted to the support rod. The second buffer springs on both sides of the slider in the groove and the damping setting can effectively absorb the vibration energy and play a role in buffering and protecting the thermocouple longitudinally.

[0017] Meanwhile, the first buffer spring and damping installed between the sleeve and the fixed rod connected to each slider can provide lateral buffer protection for the thermocouple. This multi-dimensional buffer protection mechanism can effectively reduce the impact of engine vibration on the thermocouple, extend the service life of the thermocouple, and improve the stability and accuracy of temperature measurement.

[0018] Multi-point temperature detection and heat conduction: This utility model uses the abutment spring inside the box to push each support rod to the bottom of the box, so that the bonding block connected to the lower end of the support rod can stay tightly close to the outer wall of the casing.

[0019] The rotating connection design of the support rod and the bonding block allows the bonding block to change its angle appropriately according to the arc shape of the outer wall of the casing, thereby ensuring that the flat end of the bonding block can fit tightly against the outer wall of the casing.

[0020] The heat from the casing is transferred to the probe end of the thermocouple via the bonding block, support rod, and heat-conducting wire. Because the support rod and bonding block are evenly spaced, multiple temperature points on the outer wall of the casing can be detected, and the temperature signal is transmitted to the probe end of the thermocouple via heat conduction. This multi-point temperature detection method can more comprehensively and accurately reflect the temperature distribution of the casing, providing more reliable data support for monitoring the engine's operating status.

[0021] Overheat protection function: When the casing temperature is too high, which may damage the internal components of the thermocouple, the heat conducted from the bonding block to the support rod will be transferred to the shape memory alloy spring. When the shape memory alloy spring reaches a certain temperature, it will deform, and the force generated will be greater than the elastic force of the resisting spring, thereby pushing the support rod to cause the bonding block to detach from the bonding connection with the casing and create a certain distance.

[0022] This overheat protection mechanism can effectively prevent thermocouples from being damaged by excessive thermal shock in high-temperature environments, ensuring that thermocouples work stably within the normal temperature range, improving the safety and reliability of the entire temperature measurement and protection device, and also reducing maintenance and replacement costs. Attached Figure Description

[0023] Figure 1This is a frontal cross-sectional view of the present invention.

[0024] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 This is a schematic cross-sectional view of the barrier structure of this utility model;

[0026] Figure 4 This is a front view structural diagram of the present utility model.

[0027] In the diagram: 1. Thermocouple; 2. Mounting sleeve; 3. Support structure; 301. Fixing rod; 302. Sleeve; 303. First buffer spring; 304. Slider; 305. Slide groove; 306. Support rod; 307. Second buffer spring; 308. Connecting plate; 4. Barrier structure; 401. Sleeve frame; 402. Third buffer spring; 403. Box body; 404. Support rod; 405. Adhesive block; 406. Heat-conducting wire; 407. Memory alloy spring; 408. Abutment spring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-4 This utility model provides a technical solution: a thermocouple temperature measurement and protection device for an engine casing, comprising a thermocouple 1, an mounting sleeve 2, a support structure 3, a fixing rod 301, a sleeve 302, a first buffer spring 303, a slider 304, a slide groove 305, a support rod 306, a second buffer spring 307, a connecting plate 308, a barrier structure 4, a sleeve 401, a third buffer spring 402, a housing 403, a support rod 404, a bonding block 405, a heat-conducting wire 406, a shape memory alloy spring 407, and a contact spring 408. The thermocouple 1 is characterized by having an adjustable mounting sleeve 2 installed outside it, and the mounting sleeve 2 is connected to a support structure 3 for connecting to the casing and providing buffer protection. Furthermore, the sensing end of the thermocouple 1 is covered with a barrier structure 4 for buffer protection and multi-point detection and overheat protection.

[0030] The support structure 3 includes a fixed rod 301, a sleeve 302, a first buffer spring 303, a slider 304, a groove 305, a support rod 306, a second buffer spring 307, and a connecting plate 308. Three sets of fixed rods 301 are evenly spaced about the central axis on the outer wall of the mounting sleeve 2. The end of each set of fixed rods 301 is located within the corresponding sleeve 302, and a damped first buffer spring 303 is connected between the end of each set of fixed rods 301 and the inner wall of the sleeve 302. A slider 304 is connected to the outer wall of the end of each sleeve 302, and each slider 304 is located within a corresponding groove 305. The groove 305 is formed on the support rod 306, and a damped second buffer spring 307 is connected between the groove 305 and the slider 304. A connecting plate 308 for mounting and connecting with the outer wall of the casing is rotatably connected to the lower end of each support rod 306.

[0031] Each set of fixing rods 301 has at least two, and the fixing rods 301 are arranged at equal intervals in the longitudinal direction on the outer wall of the mounting sleeve 2.

[0032] Two second buffer springs 307 are provided in each group, and each group of second buffer springs 307 is symmetrically arranged on both sides of the slider 304 within the slide groove 305.

[0033] The barrier structure 4 includes a sleeve 401, a third buffer spring 402, a housing 403, support rods 404, a bonding block 405, a heat-conducting wire 406, a shape memory alloy spring 407, and a contact spring 408. The sleeve 401 is slidably connected to the sensing end of the thermocouple 1, and a third buffer spring 402 for buffer protection is connected between the sleeve 401 and the thermocouple 1. A housing 403 is installed at the bottom of the sleeve 401. Several support rods 404, evenly spaced and densely arranged, penetrate the upper and lower surfaces of the housing 403. Each of the 04 is rotatably connected to a bonding block 405 at its lower end, and a heat-conducting wire 406 is connected between the upper end of each support rod 404 and the detection end of the thermocouple 1. A memory alloy spring 407 is sleeved on the outer wall of the area of ​​each support rod 404 inside the housing 403, and the end of the memory alloy spring 407 is connected to the bottom of the inner wall of the housing 403. An abutment spring 408 is connected between the outer wall of the area of ​​each support rod 404 inside the housing 403 and the top of the inner wall of the housing 403. The abutment spring 408 is used to make the bonding block 405 fit tightly against the outer wall of the housing.

[0034] The support rod 404 is configured as a cross shape, and the support rod 404 is slidably connected to the housing 403. The mating block 405 is configured as a semi-circular structure that facilitates angular rotation, and the planar area of ​​the semi-circular structure is used to increase the mating area with the outer wall of the casing.

[0035] Working principle: According to Figure 1As shown, the support rod 306 and connecting plate 308 are first fixedly installed on the outer wall of the casing. The support rod 306 and connecting plate 308 are rotatably connected. The connecting plate 308 can rotate at a certain angle with the support rod 306 as needed, so that the connecting plate 308 can be installed close to the outer wall of the casing. When the engine in the casing is running, the vibration generated by the vibration acts on the support rod 306. The second buffer spring 307 and damping on both sides of the slider 304 in the slide groove 305 can provide longitudinal buffer protection for the thermocouple 1. The first buffer spring 303 and damping between the sleeve 302 connected to each slider 304 and the fixed rod 301 can provide lateral buffer protection for the thermocouple 1.

[0036] By setting the abutment spring 408 inside the housing 403, each support rod 404 is pushed to move towards the bottom of the housing 403, so that the bonding block 405 connected to the lower end of the support rod 404 can be kept close to the outer wall of the housing. The rotational connection between the support rod 404 and the bonding block 405 allows the bonding block 405 to change its angle appropriately according to the different curvature of the outer wall of the housing, so as to ensure that the flat end of the bonding block 405 is in close contact with the outer wall of the housing. This allows the heat of the housing to be transferred to the probe end of the thermocouple 1 through the bonding block 405, the support rod 404 and the heat conduction wire 406. Furthermore, the equal spacing of several bonding blocks 405 and support rods 404 allows for temperature detection at multiple points on the outer wall of the housing, and the temperature is transferred to the detection end of the thermocouple 1 through heat conduction.

[0037] When the casing temperature overheats, it can easily damage the internal components of thermocouple 1. At this time, the heat conducted to the support rod 404 through the bonding block 405 is transferred to the shape memory alloy spring 407, causing the shape memory alloy spring 407 to deform after reaching a certain temperature. The force is greater than that of the abutment spring 408, which pushes the support rod 404 to cause the bonding block 405 to disengage from the casing, creating a certain distance and achieving the effect of overheat protection. This is the working principle of the thermocouple temperature measurement and protection device used in the engine casing.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermocouple temperature measurement and protection device for an engine casing, comprising a thermocouple (1), a mounting sleeve (2), a support structure (3), a fixing rod (301), a sleeve (302), a first buffer spring (303), a slider (304), a slide groove (305), a support rod (306), a second buffer spring (307), a connecting plate (308), a barrier structure (4), a sleeve frame (401), a third buffer spring (402), a housing (403), a support rod (404), a bonding block (405), a heat-conducting wire (406), a shape memory alloy spring (407), and a contact spring (408), characterized in that: The thermocouple (1) is fitted with an adjustable mounting sleeve (2), and the mounting sleeve (2) is connected to a support structure (3) for connecting with the casing and providing buffer protection. The probe end of the thermocouple (1) is fitted with a barrier structure (4) for buffer protection and providing multi-point detection and overheat protection.

2. The thermocouple temperature measurement and protection device for the engine casing according to claim 1, characterized in that: The support structure (3) includes a fixed rod (301), a sleeve (302), a first buffer spring (303), a slider (304), a groove (305), a support rod (306), a second buffer spring (307), and a connecting plate (308). The outer wall of the mounting sleeve (2) is provided with three sets of fixed rods (301) at equal intervals about the central axis, and the end of each set of fixed rods (301) is located inside the corresponding sleeve (302). The end of each set of fixed rods (301) is connected to the inner wall of the sleeve (302). There is a damped first buffer spring (303), and a slider (304) is connected to the outer wall of the end of each sleeve (302). Each slider (304) is located in a corresponding groove (305), and the groove (305) is opened on the support rod (306). A damped second buffer spring (307) is connected between each groove (305) and the slider (304). The lower end of each support rod (306) is rotatably connected to a connecting plate (308) for mounting and connecting with the outer wall of the casing.

3. A thermocouple temperature measurement and protection device for an engine casing according to claim 2, characterized in that: Each set of fixing rods (301) is provided with at least two, and the fixing rods (301) are arranged at equal intervals in the longitudinal direction on the outer wall of the mounting sleeve (2).

4. A thermocouple temperature measurement and protection device for an engine casing according to claim 2, characterized in that: Two second buffer springs (307) are provided in each group, and each group of second buffer springs (307) is symmetrically arranged on both sides of the slider (304) in the slide groove (305).

5. A thermocouple temperature measurement and protection device for an engine casing according to claim 1, characterized in that: The barrier structure (4) includes a sleeve (401), a third buffer spring (402), a housing (403), support rods (404), a bonding block (405), a heat-conducting wire (406), a shape memory alloy spring (407), and a contact spring (408). The probe end of the thermocouple (1) is slidably connected to the sleeve (401), and a third buffer spring (402) for buffer protection is connected between the sleeve (401) and the thermocouple (1). A housing (403) is installed at the bottom of the sleeve (401). Several support rods (404) are densely arranged at equal intervals on the housing (403), penetrating the upper and lower ends of the housing (403). Each support rod (404) has a rotatable connecting block (405) at its lower end, and a heat-conducting wire (406) is connected between the upper end of each support rod (404) and the detection end of the thermocouple (1). Each support rod (404) is fitted with a shape memory alloy spring (407) on the outer wall of the area inside the housing (403), and the end of the shape memory alloy spring (407) is connected to the bottom of the inner wall of the housing (403). An abutment spring (408) is connected between the outer wall of the area inside the housing (403) of each support rod (404) and the top of the inner wall of the housing (403). The abutment spring (408) is used to make the connecting block (405) fit tightly against the outer wall of the housing.

6. A thermocouple temperature measurement and protection device for an engine casing according to claim 5, characterized in that: The support rod (404) is configured as a cross shape, and the support rod (404) is slidably connected to the housing (403). The fitting block (405) is configured as a semi-circular structure that facilitates angle rotation, and the planar area of ​​the semi-circular structure is used to increase the fitting area with the outer wall of the casing.

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