Gas turbine combustion chamber flame data detection system

Abstract

The utility model discloses a flame data detection system for a combustion chamber of a gas turbine, which relates to the technical field of gas turbines and comprises a flame detection sensor mounted in the combustion chamber through a mounting mechanism which comprises a first heat insulation mounting box and a second heat insulation mounting box. The second heat insulation installation box is fixedly installed on the inner wall of a combustion chamber, and the outer wall of the first heat insulation installation box is connected with the inner wall of the second heat insulation installation box in a sliding and sealing mode. Therefore, the risk that the flame detection sensor is loosened, abraded or damaged due to vibration is reduced, the reliability of the system is improved, the service life of the flame sensor is remarkably prolonged, and the maintenance and replacement cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to a gas turbine combustion chamber flame data detection system. Background Art

[0002] Gas turbines are important energy conversion equipment. Flame data detection in their combustion chambers is crucial to ensuring combustion efficiency and safety. Traditional flame data detection systems usually install flame sensors in the combustion chambers to achieve real-time monitoring of flame status.

[0003] However, during actual operation, the flame combustion in the gas turbine combustion chamber will produce significant vibrations. Due to the vibrations generated by the flame combustion in the combustion chamber, the flame sensor may be subjected to mechanical shock, which will have an adverse effect on its service life. Damage may also cause errors in the detection data. Therefore, in order to improve the accuracy and service life of the flame sensor in flame data detection, this device proposes a gas turbine combustion chamber flame data detection system. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a gas turbine combustion chamber flame data detection system.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A gas turbine combustion chamber flame data detection system includes a flame detection sensor mounted within the combustion chamber via a mounting mechanism, the mounting mechanism comprising a first thermally insulated mounting box and a second thermally insulated mounting box, the second thermally insulated mounting box being fixedly mounted to an inner wall of the combustion chamber, an outer wall of the first thermally insulated mounting box and an inner wall of the second thermally insulated mounting box being connected in a sliding and sealing manner, a mounting bracket being fixedly mounted to an outer wall of the flame detection sensor, an end of the mounting bracket remote from the flame detection sensor being fixedly connected to the inner wall of the first thermally insulated mounting box;

[0007] A buffer mechanism is provided inside the second heat-insulating mounting box, and the buffer mechanism is used to buffer the vibration force applied to the first heat-insulating mounting box in the longitudinal direction, so as to reduce the vibration force applied to the flame detection sensor in the longitudinal direction.

[0008] The above technical solution further includes: the buffer mechanism includes two damping rods fixedly installed on the inner wall of the combustion chamber, one end of the damping rod away from the inner wall of the combustion chamber is fixedly connected to the outer wall of the first thermal insulation mounting box, and the outer side of the damping rod is provided with a buffer spring, and the two ends of the buffer spring are respectively fixedly connected to the inner wall of the combustion chamber and the outer wall of the first thermal insulation mounting box.

[0009] Furthermore, two protrusions are symmetrically installed on the inner wall of the second heat-insulating installation box, and movable grooves are symmetrically opened on the side wall of the first heat-insulating installation box, and the outer walls of the protrusions are slidably connected to the inner walls of the movable grooves.

[0010] Furthermore, the first heat-insulating installation box and the second heat-insulating installation box are both made of heat-insulating and high-temperature-resistant materials.

[0011] Furthermore, a cooling mechanism is provided inside the first thermally insulating installation box, which is used to monitor the temperature environment inside the first thermally insulating installation box and start accelerating the cooling of the first thermally insulating installation box when the temperature exceeds a set threshold range.

[0012] Furthermore, the cooling mechanism includes a temperature sensor fixedly mounted on the inner wall of the first thermally insulating mounting box, the temperature sensor is used to monitor the temperature inside the first thermally insulating mounting box, a cooling water pipe is installed on the inner wall of the first thermally insulating mounting box, both ends of the cooling water pipe respectively extend from the shell of the combustion chamber to the outside of the combustion chamber, one end of the cooling water pipe is connected to a circulation pump, and the other end of the cooling water pipe is connected to the water inlet of the cooling water tank, and the water inlet end of the circulating pump is connected to the water outlet of the cooling water tank.

[0013] Furthermore, two hoses are installed on the cooling water pipe, and the hoses are located near the combustion chamber shell.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In the present invention, a buffer mechanism is provided, which can buffer the vibration force in the longitudinal direction exerted on the flame detection sensor, effectively reducing the influence of the longitudinal vibration generated when the flame burns in the combustion chamber of the gas turbine on the flame sensor. The longitudinal vibration buffer mechanism reduces the mechanical impact exerted on the flame detection sensor, thereby reducing the risk of loosening, wear or damage of the flame detection sensor due to vibration, which not only improves the reliability of the system, but also significantly extends the service life of the flame sensor and reduces the cost of maintenance and replacement.

[0016] 2. In the present invention, a cooling mechanism is provided, through which the temperature inside the insulation box can be monitored in real time. If the temperature inside the insulation box exceeds the set threshold range, the circulation pump is started to circulate the cooling water in the cooling water pipe to accelerate the dissipation of heat in the insulation box, thereby making the working environment of the flame detection sensor more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the cross-sectional structure of a gas turbine;

[0018] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0020] In the picture:

[0021] 10. Flame detection sensor; 11. Mounting bracket; 20. First thermal insulation mounting box; 21. Second thermal insulation mounting box; 22. Bump; 23. Movable slot; 24. Damping rod; 25. Buffer spring; 31. Cooling water pipe; 32. Hose. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] Refer to the attached Figure 1-3 The utility model proposes a gas turbine combustion chamber flame data detection system, including a flame detection sensor 10 installed inside the combustion chamber through a mounting mechanism; wherein the flame detection sensor 10 can adopt the model: D-GT 800 ultraviolet flame sensor produced by Germany's Dürrag Company, which is suitable for monitoring flames under harsh conditions, has high spectral sensitivity and stability, and can work reliably in high temperature and high pressure environments.

[0025] The mounting mechanism includes a first thermal insulation mounting box 20 and a second thermal insulation mounting box 21. The second thermal insulation mounting box 21 is fixedly mounted on the inner wall of the combustion chamber. The outer wall of the first thermal insulation mounting box 20 and the inner wall of the second thermal insulation mounting box 21 are slidingly sealed. The first thermal insulation mounting box 20 and the second thermal insulation mounting box 21 are both made of thermal insulation and high-temperature resistant materials. Among them, the thermal insulation and high-temperature resistant materials can be selected from the thermal insulation materials used on the space shuttle, such as quartz fiber or ceramic insulation tiles.

[0026] Two protrusions 22 are symmetrically mounted on the inner wall of the second heat-insulating installation box 21 . Movable grooves 23 are symmetrically opened on the side wall of the first heat-insulating installation box 20 . The outer walls of the protrusions 22 are slidably connected to the inner walls of the movable grooves 23 .

[0027] A mounting bracket 11 is fixedly mounted on the outer wall of the flame detection sensor 10, and one end of the mounting bracket 11 away from the flame detection sensor 10 is fixedly connected to the inner wall of the first thermally insulating mounting box 20; wherein, a through hole is opened on the outer wall of the first thermally insulating mounting box 20, and the detection end of the flame detection sensor 10 extends into the through hole, and the detection end faces the position where the flame is ejected, so that the flame data can be detected by the flame detection sensor 10; in addition, quartz glass is arranged in the through hole to seal the through hole. The quartz glass can remain transparent and stable at extremely high temperatures and is not easy to deform or crack. At the same time, the quartz glass also has good transmittance to the specific wavelength light generated by the flame, so that it will not affect the detection of the flame by the flame detection sensor 10.

[0028] A buffer mechanism is provided inside the second thermal insulation mounting box 21, which is used to buffer the vibration force received by the first thermal insulation mounting box 20 in the longitudinal direction, so as to reduce the vibration force received by the flame detection sensor 10 in the longitudinal direction; the buffer mechanism includes two damping rods 24 fixedly mounted on the inner wall of the combustion chamber, and one end of the damping rod 24 away from the inner wall of the combustion chamber is fixedly connected to the outer wall of the first thermal insulation mounting box 20, and a buffer spring 25 is provided on the outer side of the damping rod 24, and the two ends of the buffer spring 25 are respectively fixedly connected to the inner wall of the combustion chamber and the outer wall of the first thermal insulation mounting box 20; wherein, when the flame is burning, the combustion process causes vibration in the combustion chamber, and a buffer mechanism is provided here to alleviate the vibration force received by the flame detection sensor 10 in the upper and lower (i.e. longitudinal) directions, thereby effectively reducing the influence of the longitudinal vibration generated by the flame burning in the gas turbine combustion chamber on the flame detection sensor 10.

[0029] A cooling mechanism is also provided inside the first heat-insulating installation box 20, which is used to monitor the temperature environment inside the first heat-insulating installation box 20 and start accelerating the cooling of the first heat-insulating installation box 20 when the temperature exceeds a set threshold range.

[0030] The cooling mechanism includes a temperature sensor fixedly mounted on the inner wall of the first heat-insulating mounting box 20. The temperature sensor is used to monitor the temperature inside the first heat-insulating mounting box 20. A cooling water pipe 31 is mounted on the inner wall of the first heat-insulating mounting box 20 (the cooling water pipe 31 is arranged on the inner wall of the first heat-insulating mounting box 20 in a bolted manner). Both ends of the cooling water pipe 31 extend from the shell of the combustion chamber to the outside of the combustion chamber. One end of the cooling water pipe 31 is connected to a circulating pump, and the other end of the cooling water pipe 31 is connected to the water inlet of the cooling water tank. The water inlet end of the circulating pump is connected to the water outlet of the cooling water tank. A cooling water pipe 31 is also provided on the outside of the combustion turbine. The controller, temperature sensor, and circulation pump are all electrically connected to the controller. The principle of the cooling mechanism is as follows: when the temperature sensor detects that the temperature range inside the first insulation installation box 20 exceeds the set threshold range, the temperature sensor transmits an electrical signal to the controller, and the controller transmits an electrical signal to the circulation pump to start the circulation pump. After the circulation pump is started, the cooling water inside the cooling water pipe 31 circulates, thereby accelerating the removal of heat from the inside of the first insulation installation box 20, and then the inside of the first insulation installation box 20 is cooled to a temperature range suitable for the operation of the flame detection sensor 10 as soon as possible, thereby improving the stability of the flame detection sensor 10 during the detection process.

[0031] Two hoses 32 are installed on the cooling water pipe 31, and the hoses 32 are located near the combustion chamber shell. The outer wall of the cooling water pipe 31 is sealed with the through hole on the combustion chamber shell, and the cooling water pipe 31 is made of metallic copper, which has good thermal conductivity and is convenient for heat exchange. It should be noted that the material of the gas turbine combustion chamber shell itself also has good thermal insulation and heat resistance.

[0032] In this embodiment, when the flame in the combustion chamber is in a burning state, in order to reduce the impact of vibration generated during the combustion process on the life and subsequent detection accuracy of the flame detection sensor 10, a buffer mechanism is provided in the present device. The buffer mechanism can buffer the vibration force in the longitudinal direction received by the flame detection sensor 10, effectively reducing the impact of the longitudinal vibration generated when the flame is burning in the gas turbine combustion chamber on the flame detection sensor 10, and the longitudinal vibration buffer mechanism reduces the mechanical impact received by the flame detection sensor 10, thereby reducing the risk of loosening, wear or damage of the flame detection sensor 10 due to vibration, which not only improves the reliability of the system, but also significantly extends the service life of the flame detection sensor 10 and reduces the cost of maintenance and replacement.

[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas turbine combustor flame data detection system, characterized in that: The invention relates to a flame detection sensor (10) installed inside a combustion chamber via a mounting mechanism, wherein the mounting mechanism comprises a first heat-insulating mounting box (20) and a second heat-insulating mounting box (21), wherein the second heat-insulating mounting box (21) is fixedly mounted on the inner wall of the combustion chamber, wherein the outer wall of the first heat-insulating mounting box (20) and the inner wall of the second heat-insulating mounting box (21) are connected in a sliding and sealing manner, and a mounting bracket (11) is fixedly mounted on the outer wall of the flame detection sensor (10), wherein one end of the mounting bracket (11) away from the flame detection sensor (10) is fixedly connected to the inner wall of the first heat-insulating mounting box (20); A buffer mechanism is provided inside the second heat-insulating mounting box (21), and the buffer mechanism is used to buffer the vibration force applied to the first heat-insulating mounting box (20) in the longitudinal direction, thereby reducing the vibration force applied to the flame detection sensor (10) in the longitudinal direction.

2. A gas turbine combustor flame data detection system according to claim 1, characterized in that: The buffer mechanism comprises two damping rods (24) fixedly mounted on the inner wall of the combustion chamber, one end of the damping rod (24) away from the inner wall of the combustion chamber is fixedly connected to the outer wall of the first heat-insulating mounting box (20), a buffer spring (25) is sleeved on the outside of the damping rod (24), and two ends of the buffer spring (25) are respectively fixedly connected to the inner wall of the combustion chamber and the outer wall of the first heat-insulating mounting box (20).

3. A gas turbine combustor flame data detection system according to claim 2, characterized in that: Two protrusions (22) are symmetrically installed on the inner wall of the second heat-insulating installation box (21), and movable grooves (23) are symmetrically opened on the side wall of the first heat-insulating installation box (20), and the outer walls of the protrusions (22) are slidably connected to the inner walls of the movable grooves (23).

4. A gas turbine combustor flame data detection system according to claim 3, characterized in that: The first heat-insulating installation box (20) and the second heat-insulating installation box (21) are both made of heat-insulating and high-temperature-resistant materials.

5. A gas turbine combustor flame data detection system according to claim 4, characterized in that: A cooling mechanism is also provided inside the first heat-insulating installation box (20), and the cooling mechanism is used to monitor the temperature environment inside the first heat-insulating installation box (20), and to start accelerating the cooling of the inside of the first heat-insulating installation box (20) when the temperature exceeds a set threshold range.

6. A gas turbine combustor flame data detection system according to claim 5, characterized in that: The cooling mechanism includes a temperature sensor fixedly mounted on the inner wall of the first heat-insulating mounting box (20), the temperature sensor being used to monitor the temperature inside the first heat-insulating mounting box (20), a cooling water pipe (31) being mounted on the inner wall of the first heat-insulating mounting box (20), both ends of the cooling water pipe (31) respectively extending from the shell of the combustion chamber to the outside of the combustion chamber, one end of the cooling water pipe (31) being connected to a circulation pump, the other end of the cooling water pipe (31) being connected to the water inlet of the cooling water tank, and the water inlet end of the circulation pump being connected to the water outlet of the cooling water tank.

7. A gas turbine combustor flame data detection system according to claim 6, characterized in that: Two hoses (32) are installed on the cooling water pipe (31), and the hoses (32) are located near the combustion chamber shell.

Images