Combined probe and gas turbine

Abstract

The invention relates to the technical field of gas turbines, in particular to a combined probe and a gas turbine.The combined probe comprises a carrier, a first monitoring probe and a second monitoring probe, and the carrier is detachably arranged on a combustion chamber; the first monitoring probe is arranged on the carrier and is used for monitoring the change of the heat release rate in the combustion chamber; the second monitoring probe is arranged on the carrier and used for monitoring pressure pulsation in the combustion chamber, the combined probe is convenient to disassemble and assemble, and meanwhile the space utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and in particular to a combined probe and a gas turbine. Background Art

[0002] A typical unstable combustion phenomenon in the combustion chamber of ground gas turbines and aircraft engines is lean flameout, which has two main causes: (1) Lean combustion technology is often used in gas turbines and aircraft engines to reduce the temperature of the main combustion zone, thereby reducing NOx emissions, which increases the possibility of lean flameout; (2) During the deceleration process of gas turbines and aircraft engines, if the speed of oil reduction is too fast, it is easy to cause lean flameout. It can be seen that when adjusting the equivalence ratio of the combustion chamber, whether it is active or passive adjustment, it may lead to lean flameout. Once it occurs, it may cause serious consequences such as power station shutdown or aviation accidents.

[0003] Another unstable combustion phenomenon is combustion oscillation. Lean premixed combustion chambers are prone to combustion oscillation caused by the coupling of heat release rate pulsation and acoustic pressure pulsation, which leads to unstable flame combustion and even damages the combustion chamber structure in severe cases. Therefore, monitoring the heat release rate change through PMT can determine whether flameout has occurred, while using PCB sensors to monitor pressure pulsation can help identify whether there is combustion oscillation. At present, the traditional method is to install the PMT probe and PCB probe separately, which is not convenient during disassembly and assembly, and has low space utilization. Summary of the invention

[0004] The invention provides a combined probe and a gas turbine. The combined probe is convenient to disassemble and assemble and improves space utilization.

[0005] In a first aspect, an embodiment of the present invention provides a combined probe, comprising: a carrier, which is detachably arranged on a combustion chamber; a first monitoring probe, which is arranged on the carrier and is used to monitor changes in heat release rate in the combustion chamber; and a second monitoring probe, which is arranged on the carrier and is used to monitor pressure pulsation in the combustion chamber.

[0006] In a possible implementation, the carrier includes a tube body, and a first channel for installing the first monitoring probe and a second channel for installing the second monitoring probe are provided inside the tube body.

[0007] In a possible implementation, the tube body includes a first end located inside the combustion chamber and a second end located outside the combustion chamber, and the first monitoring probe is adjacent to the first end.

[0008] In a possible implementation, a heat-insulating lens assembly is disposed at the end of the first channel, and the heat-insulating lens assembly is used to isolate the first monitoring probe from the combustion chamber.

[0009] In a possible implementation, a limiting boss is provided in the first channel, the first monitoring probe is provided at one end of the limiting boss, and the thermal insulation lens assembly is detachably provided at the other end of the limiting boss.

[0010] In a possible implementation manner, a cooling channel is arranged inside the tube body around the first channel, and a liquid inlet and a liquid outlet communicating with the cooling channel are arranged on the tube body.

[0011] In one possible implementation, the cooling channel includes: a liquid inlet water trough, which is spirally arranged around the first channel, and the liquid inlet water trough is connected to the liquid inlet; a liquid outlet water trough, which is spirally arranged around the first channel, and the liquid outlet trough is connected to the liquid outlet; a connecting water trough, adjacent to one end of the tube body located inside the combustion chamber, and the connecting water trough connects the liquid inlet water trough and the liquid outlet water trough.

[0012] In a possible implementation, the cooling channel is an annular interlayer arranged around the first channel, and the tube body also includes a liquid delivery pipe connected to the liquid inlet, and the liquid delivery pipe is located in the annular interlayer and is used to transport the cooling liquid input from the liquid inlet to the first end.

[0013] In a possible implementation, a plurality of liquid inlets and liquid delivery tubes are provided in a one-to-one correspondence, and output ends of the plurality of liquid delivery tubes are evenly distributed around the first monitoring probe.

[0014] In a second aspect, an embodiment of the present invention provides a gas turbine, comprising: a combustion chamber; and the above-mentioned combined probe.

[0015] The combined probe and gas turbine provided by the present invention integrate a first monitoring probe for monitoring changes in heat release rate in a combustion chamber and a second monitoring probe for monitoring pressure pulsation in the combustion chamber onto a carrier, and then detachably connect the carrier to the combustion chamber, thereby achieving the purpose of convenient disassembly and assembly, while reducing space occupancy and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a combination probe provided by the present invention.

[0018] Figure 2 It is a schematic diagram of the planar structure of a combined probe provided by the present invention.

[0019] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the combined probe along the AA direction.

[0020] Figure 4 It is a structural schematic diagram of a combined probe provided by the present invention when connected to a combustion chamber.

[0021] Figure 5 yes Figure 4 Schematic diagram of the local enlarged structure at point B.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of another combination probe provided by the present invention.

[0023] Figure 7 It is a partial structural schematic diagram of a liquid inlet trough and a liquid outlet trough provided by the present invention.

[0024] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure of the combined probe shown.

[0025] Fig. 9 yes Figure 8 Schematic diagram of the local enlarged structure at C.

[0026] Reference numerals: 1. Carrier; 11. Tube body; 111. First channel; 112. Second channel; 113. First end; 114. Second end; 115. Position limiting boss; 116. Cooling channel; 1161. Liquid inlet water tank; 1162. Liquid outlet water tank; 1163. Connecting water tank; 117. Liquid inlet; 118. Liquid outlet; 119. Liquid delivery pipe; 2. Combustion chamber; 3. First monitoring probe; 4. Second monitoring probe; 5. Heat-insulating lens assembly; 51. Lens body; 52. Sealing gasket; 53. Fastener; 6. Flange. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Combine the following Figure 1-9A combination probe provided in an embodiment of the present invention is described, comprising: a carrier 1, which is detachably arranged on a combustion chamber 2; a first monitoring probe 3, which is arranged on the carrier 1 and is used to monitor the change of heat release rate in the combustion chamber 2; and a second monitoring probe 4, which is arranged on the carrier 1 and is used to monitor the pressure pulsation in the combustion chamber 2.

[0029] Specifically, the first monitoring probe 3 is a PMT probe, which is used to monitor the change of heat release rate in the combustion chamber 2. By monitoring the change of heat release rate, it can be determined whether flameout occurs; the second monitoring probe 4 is a PCB probe, which is used to monitor the pressure pulsation in the combustion chamber 2. By monitoring the pressure pulsation, it is helpful to identify whether there is combustion oscillation in the combustion chamber 2, and take corresponding measures according to the monitored information to avoid combustion oscillation in the combustion chamber 2 due to unstable flame combustion, thereby protecting the structure of the combustion chamber 2.

[0030] In the present invention, a first monitoring probe 3 for monitoring the change of heat release rate in the combustion chamber 2 and a second monitoring probe 4 for monitoring the pressure pulsation in the combustion chamber 2 are integrated into a carrier 1, and then the carrier 1 is detachably connected to the combustion chamber 2, thereby achieving the purpose of convenient disassembly and assembly, while reducing the space occupied and improving space utilization.

[0031] In the related technology, the current traditional method is to install the PMT probe and the PCB probe separately, which is not convenient during disassembly and assembly, and has low space utilization. At the same time, two installation holes need to be opened in the combustion chamber 2, and in many cases, the number and position of the holes in the combustion chamber 2 may not be sufficient when it is designed. Moreover, the PMT probe and the PCB probe are installed separately, and there is a signal time difference and phase difference due to the different measurement positions, which is not convenient for analyzing the mode and characteristics of the combustion oscillation, affecting the accuracy of the subsequent monitoring results. In the embodiment provided by the present invention, by integrating the first monitoring probe 3 and the second monitoring probe 4 on the same carrier 1, and then connecting the carrier 1 to the combustion chamber 2, only one mounting hole for mounting the carrier 1 is required on the combustion chamber 2, which significantly reduces the number of openings required for the combustion chamber 2. In practical applications, especially in space-constrained occasions such as aircraft engines, the number of openings directly affects the structural strength and sealing performance. This design can maintain the structural integrity of the combustion chamber 2 to the greatest extent while ensuring the monitoring function.

[0032] In addition, combining the two monitoring probes together can eliminate the signal time difference and phase difference caused by different measurement positions. In combustion oscillation analysis, this synchronization is of great significance for accurately judging the combustion mode and characteristics. For example, during the operation of a gas turbine, the occurrence and development of combustion oscillation can be more accurately identified.

[0033] Moreover, the detachable design of the carrier 1 and the combustion chamber 2 makes the installation, maintenance and replacement of the probe more convenient. In industrial applications, this design can significantly reduce the downtime maintenance time of the equipment and improve the operation efficiency.

[0034] Specifically, the material of the carrier 1 can be selected from high-temperature resistant alloys of different grades, such as Inconel718 or HastelloyX; the installation method of the first monitoring probe 3 and the second monitoring probe 4 can be threaded connection, snap-on connection or flange connection; the signal transmission method can be optical fiber transmission or cable transmission, which will not be elaborated here.

[0035] like Figure 1 , 3 As shown in FIGS. 4 and 8 , in some embodiments, the carrier 1 includes a tube body 11 , and a first channel 111 for installing the first monitoring probe 3 and a second channel 112 for installing the second monitoring probe 4 are provided inside the tube body 11 .

[0036] In the present invention, by respectively arranging the first monitoring probe 3 and the second monitoring probe 4 in the first channel 111 and the second channel 112 of the tube body 11, a dual-channel design is adopted to achieve effective isolation and space optimization configuration of the first monitoring probe 3 and the second monitoring probe 4. This structural design maximizes the use of limited space while ensuring the independent working environment of each probe.

[0037] Moreover, the independent channel design can effectively reduce the mutual interference between the first monitoring probe 3 and the second monitoring probe 4. In practical applications, especially in industrial sites under strong electromagnetic environments, this isolation design can improve the accuracy and reliability of signals.

[0038] like Figure 1 As shown, in some embodiments, the tube body 11 includes a first end 113 located inside the combustion chamber 2 and a second end 114 located outside the combustion chamber 2 , and the first monitoring probe 3 is adjacent to the first end 113 .

[0039] In the present invention, by arranging the first monitoring probe 3 near the first end 113 of the tube body 11, it can be closer to the flame area and improve the accuracy of heat release rate monitoring. This arrangement expands the field of view of the first monitoring probe 3 and obtains more comprehensive flame information.

[0040] Moreover, by clearly distinguishing the inner and outer ends of the pipe body 11, it is convenient to correctly position and install it during the actual installation process. This design can reduce installation errors and improve installation efficiency in engineering practice.

[0041] Optionally, a position adjustment mechanism can be added to achieve precise adjustment of the position of the first monitoring probe 3, and the position of the first monitoring probe 3 can be finely adjusted according to specific application scenarios. Tubes 11 with different lengths can also be designed to adapt to combustion chambers 2 of different sizes.

[0042] In some embodiments, a heat-insulating lens assembly 5 is provided at the end of the first channel 111, and the heat-insulating lens assembly 5 is used to isolate the first monitoring probe 3 and the combustion chamber 2.

[0043] In the present invention, by providing a dedicated heat-insulating lens assembly 5 in the first channel 111, it can provide a broader monitoring perspective for the first monitoring probe 3, and can prevent loosening in high-temperature and vibration environments, ensuring the stability of the installation of the first monitoring probe 3. During actual operation, this design can extend the service life of the first monitoring probe 3 and reduce the maintenance frequency.

[0044] In some embodiments, the end of the second channel 112 extends to the outside of the tube 11, and a second fixing member for fixing the second detection probe is provided at the end of the second channel 112, and the second fixing member is located outside the tube 11.

[0045] In some embodiments, a limiting boss 115 is provided in the first channel 111, the first monitoring probe 3 is arranged at one end of the limiting boss 115, and the heat-insulating lens assembly 5 is detachably arranged at the other end of the limiting boss 115.

[0046] In the present invention, by providing a limiting boss 115 in the first channel 111, the limiting boss 115 is of an annular structure to ensure the field of view of the first monitoring probe 3. The limiting boss 115 is used for installing the first monitoring probe 3 on the one hand and for installing and limiting the heat-insulating lens assembly 5 on the other hand, ensuring the accuracy and repeatability of the installation position of the heat-insulating lens assembly 5 each time, and different focal-length heat-insulating lens assemblies 5 can be replaced according to actual needs to ensure the detection quality of the change in the heat release rate in the combustion chamber 2 by the first monitoring probe 3.

[0047] As Figure 5 、 9 shown, in some embodiments, the heat-insulating lens assembly 5 includes a lens body 51, a sealing gasket 52 and a fastener 53, and one sealing gasket 52 is arranged between the limiting boss 115 and the lens body 51, and the other sealing gasket 52 is arranged between the lens body 51 and the fastener 53.

[0048] In the present invention, the lens body 51 is limited by the design of the limiting boss 115 to ensure the accuracy and repeatability of the installation position of the first monitoring probe 3. In practical applications, this structure can ensure that the position of the first monitoring probe 3 is consistent after each installation, ensuring the comparability of the measurement data. The dual fixing method of the lens body 51 and the fastener 53 is adopted to improve the reliability of the probe fixation. In a high temperature and high vibration environment, this design can effectively prevent the first monitoring probe 3 from loosening.

[0049] Optionally, the limiting boss 115 can be integrally formed or installed in parts, and the fastener 53 can be connected by different types of threads, and an anti-loosening washer or a locking device can be added.

[0050] In a specific embodiment, the lens body 51 is made of high temperature resistant glass. The upper and lower sealing gaskets 52 are used to ensure the sealing inside the first channel 111. The high temperature resistant glass can be used to perform long-term stable work in the combustion chamber 2. The fastener 53 is a bolt, which is connected to the first channel 111 through a thread. By rotating the bolt, the lens body 51 can be fixed and pressed, which is convenient for disassembly and assembly.

[0051] Specifically, the first channel 111 is provided with an opening at one end away from the heat-insulating lens assembly 5 , and the opening is located at the second end 114 of the tube body 11 . The opening is provided to facilitate line connection of the first monitoring probe 3 .

[0052] In some embodiments, a cooling channel 116 is disposed inside the tube body 11 around the first channel 111 , and a liquid inlet 117 and a liquid outlet 118 communicating with the cooling channel 116 are disposed on the tube body 11 .

[0053] In the present invention, by providing a cooling channel 116 between the tube body 11 and the first channel 111, the operating temperature of the first monitoring probe 3 is effectively controlled. This allows the first monitoring probe 3 to operate at a position closer to the flame, expanding the monitoring range. Moreover, an effective cooling system can significantly extend the service life of the first monitoring probe 3 and reduce failures caused by overheating.

[0054] Among them, by setting up a special liquid inlet 117 and a liquid outlet 118, forced circulation of the coolant is achieved to improve the cooling effect. This design allows the probe to work stably in a more severe temperature environment. In addition, the independent liquid inlet 117 and liquid outlet 118 facilitate the maintenance and cleaning of the cooling system, thereby improving the maintainability of the system.

[0055] like Figure 6-9As shown, in a specific embodiment, the cooling channel 116 includes: a liquid inlet water groove 1161, which is spirally arranged around the first channel 111, and the liquid inlet water groove 1161 is connected to the liquid inlet 117; a liquid outlet water groove 1162, which is spirally arranged around the first channel 111, and the liquid outlet groove is connected to the liquid outlet 118; a connecting water groove 1163, adjacent to the end of the tube body 11 located inside the combustion chamber 2, and the connecting water groove 1163 connects the liquid inlet water groove 1161 and the liquid outlet water groove 1162.

[0056] In the present invention, by setting the cooling channel 116 into a spiral inlet water tank 1161 and a liquid outlet water tank 1162, and the inlet water tank 1161 and the liquid outlet water tank 1162 are both arranged around the first channel 111, the coolant enters the inlet water tank 1161 through the liquid inlet 117, then enters the liquid outlet water tank 1162 through the connecting water tank 1163, and finally is led out through the liquid outlet 118, thereby realizing the cooling and temperature reduction of the first channel 111. The spirally arranged inlet water tank 1161 and the liquid outlet water tank 1162 can effectively increase the heat exchange area between the first channel 111 and improve the heat exchange effect, and at the same time can effectively reduce the diameter of the tube body 11, so that a smaller installation hole can be opened in the combustion chamber 2 to complete the installation of the combined probe. In addition, by reducing the diameter of the tube body 11, the volume of the tube body 11 in the internal part of the combustion chamber 2 can also be reduced, reducing the occupation of the internal space of the combustion chamber 2, thereby reducing the impact on the internal airflow of the combustion chamber 2, and ensuring the reliability of the operation of the combustion chamber 2.

[0057] Specifically, the tube body 11 can be integrally formed by 3D printing, or can be assembled by inner and outer tube bodies 11 to form a spiral inlet water tank 1161 and an outlet water tank 1162. The inlet water tank 1161 is obtained by rotating the outlet water tank 1162 by 180 degrees.

[0058] Among them, the liquid inlet water tank 1161 and the liquid outlet water tank 1162 can be set in the form of equal pitch or in the form of variable pitch. When the variable pitch form is adopted, the pitch near the first monitoring probe 3 is reduced, and the residence time of the coolant near the first monitoring probe 3 is further increased to ensure the cooling effect on the first monitoring probe 3.

[0059] The connecting water groove 1163 is an annular groove, one end of which is connected in the radial direction to the end of the liquid inlet groove 1161 away from the liquid inlet port 117, and the other end is connected to the end of the liquid outlet groove 1162 away from the liquid outlet port 118. The connecting water groove 1163 is located at the periphery of the first monitoring probe 3 and the thermal insulation lens assembly 5, and not only serves the purpose of connecting the liquid inlet groove 1161 and the liquid outlet groove 1162, but also has a certain water collection function, thereby increasing the amount of coolant near the first monitoring probe 3, thereby improving the cooling effect on the first monitoring probe 3.

[0060] like Figure 3-5 As shown, in another specific embodiment, the cooling channel 116 is an annular interlayer arranged around the first channel 111, and the tube body 11 also includes a liquid delivery pipe 119 connected to the liquid inlet 117. The liquid delivery pipe 119 is located in the annular interlayer and is used to transport the cooling liquid input from the liquid inlet 117 to the first end 113.

[0061] Specifically, a sealing ring is arranged at the end of the cooling channel 116, that is, between the first channel 111 and the tube body 11, and the sealing ring is used to ensure the sealing of the cooling channel 116. The first channel 111 is located in the cooling channel 116 and is surrounded by the coolant in the cooling channel 116. A relatively low working environment can be provided for the first monitoring probe 3 in the first channel 111, thereby ensuring the working reliability and service life of the first monitoring probe 3. At the same time, the first monitoring probe 3 can be set closer to the flame to increase the monitoring range.

[0062] Optionally, the cooling channel 116 may adopt different cross-sectional shapes, may use different cooling media, and may be designed with different flow channel structures.

[0063] In the related art, the working temperature of PMT is generally not more than 50°C. Currently, PMT is mostly arranged far away from the flame, close to point measurement, and can only obtain local information of the flame. However, in the embodiment of the present invention, by providing cooling channel 116, the first monitoring probe 3 can be as close to the flame as possible under the premise of ensuring that it is within the working temperature range, thereby increasing the monitoring range and improving the accuracy of the monitoring data.

[0064] The coolant may be cooling water, or other media having a cooling effect.

[0065] In a specific embodiment, a water inlet joint is provided at the liquid inlet 117 for connecting to an external pipeline; and a water outlet joint is provided at the liquid outlet 118 for connecting to an external pipeline. Through the design of the liquid inlet 117 and the liquid outlet 118, the coolant in the cooling channel 116 can be replaced. Specifically, the low-temperature coolant enters the cooling channel 116 through the liquid inlet 117, and is discharged through the liquid outlet 118 after heat exchange and temperature rise in the cooling channel 116, which can ensure that the coolant in the cooling channel 116 is always at a relatively low temperature to ensure the working temperature of the first monitoring probe 3.

[0066] Optionally, the inlet and outlet can be connected in different ways, a flow regulating device can be added, and a spare circulation channel can be designed. For example, a temperature sensor is set in the cooling channel 116 to monitor the temperature of the coolant in the cooling channel 116. When the temperature is high, the flow rate of the coolant can be increased to improve the cooling effect; when the temperature is low, the flow rate of the coolant can be appropriately reduced to reduce the power consumption of the cooling system.

[0067] In the present invention, the coolant is directly delivered to the first end 113 of the tube body 11 through the liquid delivery pipe 119, and the coolant can be first delivered to the vicinity of the first monitoring probe 3 to ensure that the area that needs cooling the most is fully cooled. This design can avoid local overheating caused by uneven cooling. Moreover, the directional delivery of coolant can improve the cooling efficiency and reduce the consumption of coolant.

[0068] Specifically, since the first end 113 of the tube body 11 needs to penetrate into the combustion chamber 2, and the second end 114 is located outside the combustion chamber 2, a part of the tube body 11 is located inside the combustion chamber 2. The liquid inlet 117 and the liquid outlet 118 need to be located outside the combustion chamber 2. In this embodiment, the liquid inlet 117 is arranged in the middle of the tube body 11 near the outer wall of the combustion chamber 2, so that the coolant entering the cooling channel 116 can be as close to the first monitoring probe 3 as possible. Then, the coolant is directly transported to the vicinity of the first monitoring probe 3 through the liquid delivery pipe 119 to cool the first monitoring probe 3, and then the heated coolant flows back along the cooling channel 116 to the liquid outlet 118 for output.

[0069] In a specific embodiment, the liquid delivery pipe 119 can be a straight pipe, which is arranged along the extension direction of the tube body 11 , which can effectively reduce the liquid delivery distance so that the coolant can maintain a lower temperature when it reaches the first monitoring probe 3 .

[0070] In another specific embodiment, the liquid delivery pipe 119 can also be a spiral tube, which is spirally wound in the cooling channel 116. A spiral liquid delivery channel is formed in the cooling channel 116 through the spiral tube, which facilitates the coolant to be transported to one end of the cooling channel 116 and then refluxed. This can effectively reduce the formation of an impact vortex at the end of the cooling channel 116, causing part of the coolant to reflux before reaching the first monitoring probe 3, thereby ensuring the utilization effect of the coolant and improving the cooling effect.

[0071] In another specific embodiment, the liquid delivery pipe 119 can also be in the form of a straight pipe plus a spiral pipe, the straight pipe part is connected to the liquid inlet 117, and the spiral pipe is connected to the end of the straight pipe away from the liquid inlet 117, which is used to output the coolant to the periphery of the first monitoring probe 3. After the coolant is delivered through the spiral pipe, it still maintains a certain rotation angle, so that the coolant can fully surround the periphery of the first monitoring probe 3, thereby improving the uniformity of cooling and avoiding local high temperature.

[0072] In some embodiments, a plurality of liquid inlets 117 and liquid delivery tubes 119 are provided in a one-to-one correspondence, and output ends of the plurality of liquid delivery tubes 119 are evenly distributed around the first monitoring probe 3 .

[0073] In the present invention, the uniform distribution design of multiple liquid delivery pipes 119 can achieve a more uniform cooling effect and avoid uneven temperature distribution. This design can provide a more stable working environment in practical applications. Moreover, the multi-channel design provides redundant protection, and even if some channels are blocked, the basic cooling function can still be maintained.

[0074] In a specific embodiment, there are two liquid inlets 117, and the two liquid inlets 117 are arranged oppositely. There are two liquid delivery pipes 119, and the two liquid delivery pipes 119 are arranged on both sides of the radial direction of the first channel 111 oppositely, which can not only ensure the uniformity of cooling the first monitoring probe 3 when the coolant reaches near the first monitoring probe 3, but also facilitate the reflux of the coolant. For example, the two liquid delivery pipes 119 are respectively located on the left and right sides of the first channel 111. After the coolant is led out through the liquid delivery pipes 119, it cools the first monitoring probe 3, and then refluxes on the front and back sides of the first channel 111, which facilitates the smooth reflux of the coolant while ensuring the cooling effect on the first monitoring probe 3.

[0075] Optionally, the number of the liquid delivery pipes 119 can also be selected according to the actual situation, and there is no limitation here.

[0076] This combined probe integrates the first monitoring probe 3 for monitoring the change of heat release rate in the combustion chamber 2 and the second monitoring probe 4 for monitoring the pressure pulsation in the combustion chamber 2 onto the carrier 1, and then the carrier 1 is detachably connected to the combustion chamber 2, thereby achieving the purpose of being convenient for disassembly and assembly, reducing the space occupation, and improving the space utilization rate.

[0077] An embodiment of the present invention provides a gas turbine, including: a combustion chamber 2; the above-mentioned combined probe.

[0078] In the present invention, applying the combined probe to a gas turbine can achieve comprehensive monitoring of the combustion process, improve the controllability and safety of the system. The detachable design enables the probe to adapt to different types of gas turbines, enhancing the versatility of the product.

[0079] In a specific embodiment, the carrier 1 adopts a pipe body 11, and a flange 6 is arranged on the outer periphery of the pipe body 11 and is fixedly connected to the outer wall of the combustion chamber 2 through flange bolts, thereby achieving a reliable connection between the combined probe and the combustion chamber 2 and being convenient for disassembly, installation and maintenance.

[0080] Wherein, the flange 6 is fixedly welded to the pipe body 11. When the flange 6 is fixed to the combustion chamber 2, a part of the pipe body 11 extends into the combustion chamber 2, which can ensure the firmness of the installation of the combined probe.

[0081] Optionally, the flange 6 can also be movably connected to the tube body 11, that is, the flange 6 is sleeved on the outer periphery of the tube body 11 and can slide along the axial direction of the tube body 11, and then the flange 6 and the tube body 11 are locked by adjusting bolts, and the position of the flange 6 in the axial direction of the tube body 11 can be adjusted. In this way, the length of the tube body 11 extending into the combustion chamber 2 can be adjusted, so that the first monitoring probe 3 can reach the best monitoring position and improve the monitoring effect.

[0082] Specifically, a sealing member is provided at the connection surface between the flange and the combustion chamber 2 to ensure the sealing effect of the connection.

[0083] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combined probe, characterized in that: include: A carrier (1) is detachably arranged on the combustion chamber (2); A first monitoring probe (3) is arranged on the carrier (1) and is used to monitor changes in the heat release rate in the combustion chamber (2); A second monitoring probe (4) is arranged on the carrier (1) and is used to monitor the pressure pulsation in the combustion chamber (2).

2. The combined probe according to claim 1, characterized in that: The carrier (1) comprises a tube body (11), wherein a first channel (111) for installing the first monitoring probe (3) and a second channel (112) for installing the second monitoring probe (4) are arranged inside the tube body (11).

3. The combined probe according to claim 2, characterized in that: The tube body (11) comprises a first end (113) located inside the combustion chamber (2) and a second end (114) located outside the combustion chamber (2), and the first monitoring probe (3) is adjacent to the first end (113).

4. The combined probe according to claim 3, characterized in that: A heat-insulating lens assembly (5) is provided at the end of the first channel (111), and the heat-insulating lens assembly (5) is used to isolate the first monitoring probe (3) and the combustion chamber (2).

5. The combined probe according to claim 4, characterized in that: A limiting boss (115) is provided in the first channel (111), the first monitoring probe (3) is provided at one end of the limiting boss (115), and the heat-insulating lens assembly (5) is detachably provided at the other end of the limiting boss (115).

6. The combined probe according to any one of claims 3 to 5, characterized in that: A cooling channel (116) is arranged inside the tube body (11) around the first channel (111), and a liquid inlet (117) and a liquid outlet (118) which are in communication with the cooling channel (116) are arranged on the tube body (11).

7. The combined probe according to claim 6, characterized in that: The cooling channel (116) comprises: A liquid inlet water tank (1161) is arranged in a spiral shape around the first channel (111), and the liquid inlet water tank (1161) is connected to the liquid inlet (117); A liquid outlet trough (1162) is disposed in a spiral shape around the first channel (111), the liquid outlet trough being connected to the liquid outlet (118); A connecting water groove (1163) is located adjacent to one end of the tube body (11) located inside the combustion chamber (2), and the connecting water groove (1163) is connected to the liquid inlet water groove (1161) and the liquid outlet water groove (1162).

8. The combined probe according to claim 6, characterized in that: The cooling channel (116) is an annular interlayer arranged around the first channel (111), and the tube body (11) further comprises a liquid delivery pipe (119) connected to the liquid inlet (117), wherein the liquid delivery pipe (119) is located in the annular interlayer and is used to deliver the cooling liquid input from the liquid inlet (117) to the first end (113).

9. The combined probe according to claim 8, characterized in that: The liquid inlet (117) and the liquid delivery tube (119) are provided in a one-to-one correspondence, and the output ends of the plurality of liquid delivery tubes (119) are evenly distributed around the first monitoring probe (3).

10. A gas turbine, characterized in that: include: Combustion chamber (2); The combined probe according to any one of claims 1 to 9.

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