Combustion diagnosis device and method suitable for gas turbine

Abstract

The invention relates to the technical field of gas turbines, in particular to a combustion diagnosis device suitable for a gas turbine, which comprises a main body, a main control module and a rack which is arranged in the main body and can move up and down, a strip-shaped groove is formed in the side surface of the rack, and a liquid injection mechanism is inserted into the side surface of the rack; and the tooth surface of the rack is engaged with a transmission assembly. According to the invention, through the design of the rack, the transmission assembly can be driven to drive the pressure sensor to perform rotary installation work, pressure can be applied to the extrusion rod at the same time to perform liquid injection work, and magnetic fluid is injected into a threaded connection part to improve the sealing performance between the sensor and a combustion chamber; the influence on the performance of the gas turbine caused by poor sealing performance is avoided, the up-and-down moving power of the rack can be converted into rotating power through the design of the transmission assembly, and then the pressure sensor can be installed.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and in particular to a combustion diagnosis device and method suitable for gas turbines. Background Art

[0002] A gas turbine is an internal combustion power machine that uses continuously flowing gas as a working fluid to drive the impeller to rotate at high speed, converting the energy of the fuel into useful work. It is a rotating impeller heat engine. The gas turbine is mainly divided into three steps and stratification: intake, combustion and exhaust. The combustion step is extremely important. When the air pressure in the combustion chamber is too low, it will affect the performance of the gas turbine.

[0003] Most existing gas turbine combustion diagnostic devices use pressure sensors for diagnosis. When installing pressure sensors in the gas turbine combustion chamber, they are usually fixed with bolts, and there is a certain gap between the threads, which affects the sealing of the gas turbine combustion chamber. Poor sealing causes the air pressure in the combustion chamber to drop, resulting in the combustion temperature failing to meet the standard. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art and provides the following technical solutions: A combustion diagnostic device suitable for a gas turbine includes a main body and a main control module.

[0005] A rack is arranged inside the main body and can move up and down. A strip groove is opened on the side of the rack. A liquid injection mechanism is inserted into the side of the rack. A transmission component is meshed with the tooth surface of the rack.

[0006] The output end of the transmission assembly is provided with a second bevel gear, a square through slot is provided in the middle of the second bevel gear, and a pressure sensor is inserted into the interior of the square through slot.

[0007] The injection mechanism comprises an extrusion rod, one end of the extrusion rod close to the rack is inserted into the strip groove, and the other end of the extrusion rod is fixedly connected to the outer ring of the bearing at the top of the pressure sensor; When the rack is pressed down, the transmission assembly is driven to output the rotational power through bevel gear 2 to drive the pressure sensor to rotate. When the rack is pressed down to the top of the strip groove and fits the upper surface of the extrusion rod, the continuous downward pressure of the rack drives the extrusion rod to move downward.

[0008] As an improvement of the above technical solution, the transmission assembly also includes a spur gear, a connecting shaft and a bevel gear 1. The spur gear is arranged inside the main body through the connecting shaft and meshes with the rack. The end of the connecting shaft away from the spur gear is connected to the inner wall surface of the main body. The bevel gear 1 is fixedly arranged on the side of the spur gear away from the connecting shaft and meshes with the bevel gear 2 on the upper side. The bottom of the bevel gear 2 is rotatably connected to the bottom plate surface of the main body.

[0009] As an improvement of the above technical solution, the injection mechanism also includes a liquid storage tank and an injection tube. The liquid storage tank is fixedly arranged at the bottom of the base plate of the main body, the input end of the injection tube is fixedly connected to the bottom of the liquid storage tank, and the output end of the injection tube passes through the base plate of the main body and the inner ring of the bearing at the top of the pressure sensor, and penetrates into the interior of the pressure sensor. The bottom of the extrusion rod has a rubber plug, and the rubber plug is inserted into the upper end of the liquid storage tank. The interior of the liquid storage tank is filled with magnetic fluid.

[0010] As an improvement of the above technical solution, an infusion tube is opened inside the pressure sensor, and the infusion tube is connected to the output end of the injection tube. A liquid outlet is opened on the surface of the bolt block at the bottom of the pressure sensor, and the liquid outlet is connected to the infusion tube.

[0011] As an improvement of the above technical solution, the main control module is arranged on the side surface of the main body, and the main control module is electrically connected to the pressure sensor.

[0012] As an improvement of the above technical solution, the output end of the main control module is electrically connected to the comparison module, and the output end of the comparison module is electrically connected to the alarm module.

[0013] As an improvement to the above technical solution, the upper section of the pressure sensor is a square column structure, and the size thereof matches the square through slot.

[0014] As an improvement to the above technical solution, the top end of the rack passes through to the upper portion of the exterior of the main body, and a pad is fixedly provided on the top end of the rack.

[0015] As an improvement to the above technical solution, the connecting shaft and the spur gear are rotationally connected via a bearing.

[0016] A method for using a combustion diagnostic device for a gas turbine includes the following steps: S1: Align the pressure sensor at the bottom of the main body with the sensor connection hole of the gas turbine combustion chamber and press the pad on the top of the rack. When the rack is pressed down, it will drive the spur gear of the transmission assembly to start rotating, driving the bevel gear 1 to rotate synchronously, and then the bevel gear 2 meshing on the side and bottom to start rotating, and finally drive the pressure sensor to rotate, so that the threaded block at the bottom is threadedly connected to the sensor connection hole of the gas turbine combustion chamber.

[0017] S2: When the rack is pressed down to the top of the strip groove and fits with the upper surface of the extrusion rod, the continuous downward pressure of the rack drives the extrusion rod downward, so that the rubber stopper squeezes the magnetic fluid in the liquid storage tank, driving the magnetic fluid to flow into the pressure sensor through the injection tube, and then flows through the infusion tube to the liquid outlet and enters the threaded connection for sealing.

[0018] S3: When the pressure sensor needs to be disassembled, the rack can be lifted to flip the bevel gear 2 to realize the disassembly of the pressure sensor.

[0019] S4: After the pressure sensor is installed, the pressure detection work can be carried out on the gas turbine combustion chamber. When the air pressure in the gas turbine combustion chamber fluctuates, the pressure sensor will transmit the air pressure in the gas turbine combustion chamber to the main control module in real time. The main control module will transmit the initial preset air pressure value and the feedback air pressure value to the comparison module for comparison. When the feedback air pressure value is lower or higher than the preset air pressure value, the alarm module will trigger an alarm to replace or repair the pressure sensor.

[0020] Beneficial effects of the present invention: Through the design of the rack, the transmission component can be driven to drive the pressure sensor to rotate and install, and at the same time, pressure can be applied to the extrusion rod to make it perform liquid injection, and the magnetic fluid can be injected into the threaded connection to improve the sealing between the sensor and the combustion chamber, so as to avoid the performance of the gas turbine being affected by poor sealing. The design of the transmission component can convert the up and down movement power of the rack into rotational power, thereby enabling the pressure sensor to be installed. The design of the liquid injection mechanism can inject magnetic fluid into the threaded connection. The magnetic fluid has the characteristics of magnetism, high temperature resistance and strong sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the local structure of the present invention; Figure 4 It is a local structural plan view of the present invention; Figure 5 It is a structural diagram of the main control module of the present invention.

[0022] Figure numerals: 1. Main body; 2. Main control module; 201. Comparison module; 202. Alarm module; 3. Rack; 301. Strip groove; 302. Pad; 4. Liquid injection mechanism; 401. Extrusion rod; 402. Liquid storage tank; 403. Liquid injection tube; 404. Rubber plug; 5. Transmission assembly; 501. Spur gear; 502. Connecting shaft; 503. Bevel gear one; 504. Bevel gear two; 505. Square through groove; 6. Pressure sensor; 601. Infusion tube; 602. Liquid outlet. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] Most existing gas turbine combustion diagnostic devices use pressure sensors for diagnosis. When installing pressure sensors in the gas turbine combustion chamber, they are usually fixed with bolts, and there is a certain gap between the threads, which affects the sealing of the gas turbine combustion chamber. Poor sealing causes the air pressure in the combustion chamber to drop, resulting in the combustion temperature failing to meet the standard.

[0025] To resolve this issue, see Figure 1-5 .

[0026] According to one aspect of the present invention, a combustion diagnosis device suitable for a gas turbine is provided, comprising: a main body 1 and a main control module 2 .

[0027] A rack 3 is provided inside the main body 1 and can move up and down. A strip groove 301 is provided on the side of the rack 3. A liquid injection mechanism 4 is inserted into the side of the rack 3. A transmission component 5 is provided on the tooth surface of the rack 3.

[0028] The output end of the transmission assembly 5 has a second bevel gear 504 , a square through slot 505 is provided in the middle of the second bevel gear 504 , and a pressure sensor 6 is inserted into the square through slot 505 .

[0029] The injection mechanism 4 has an extrusion rod 401 , one end of the extrusion rod 401 close to the rack 3 is inserted into the strip groove 301 , and the other end of the extrusion rod 401 is fixedly connected to the outer ring of the bearing at the top of the pressure sensor 6 .

[0030] When the rack 3 is pressed down, the transmission assembly 5 is driven to output the rotational power through the bevel gear 2 504 to drive the pressure sensor 6 to rotate. When the rack 3 is pressed down to the top of the strip groove 301 and fits the upper surface of the extrusion rod 401, the continuous downward pressure of the rack 3 drives the extrusion rod 401 to move downward.

[0031] During disassembly and assembly, align the pressure sensor 6 at the bottom of the main body 1 with the sensor connection hole of the gas turbine combustion chamber and press the pad 302 at the top of the rack 3. When the rack 3 is pressed down, the spur gear 501 of the transmission assembly 5 starts to rotate, driving the bevel gear 1 503 to rotate synchronously, and then the bevel gear 2 504 meshing on the side starts to rotate, and finally drives the pressure sensor 6 to rotate, so that the threaded block at the bottom is threadedly connected to the sensor connection hole of the gas turbine combustion chamber. When the rack 3 is pressed down to the top of the strip groove 301 When in contact with the upper surface of the extrusion rod 401, the continuous downward pressure of the rack 3 drives the extrusion rod 401 to move downward, so that the rubber stopper 404 squeezes the magnetic fluid in the liquid storage tank 402, driving the magnetic fluid to flow through the injection tube 403 to the inside of the pressure sensor 6, and then flows through the infusion tube 601 to the liquid outlet 602 and enters the threaded connection for sealing. When it is necessary to disassemble the pressure sensor 6, the rack 3 can be lifted to flip the bevel gear 2 504 to realize the disassembly of the pressure sensor 6.

[0032] During combustion diagnosis, after the pressure sensor 6 is installed, it can perform pressure detection on the gas turbine combustion chamber. When the air pressure in the gas turbine combustion chamber fluctuates, the pressure sensor 6 will transmit the air pressure in the gas turbine combustion chamber to the main control module 2 in real time. The main control module 2 will transmit the initial preset air pressure value and the feedback air pressure value to the comparison module 201 for comparison. When the feedback air pressure value is lower than or higher than the preset air pressure value, the alarm module 202 will trigger an alarm to replace or repair the pressure sensor 6.

[0033] In one embodiment, see Figure 2 The transmission assembly 5 also includes a spur gear 501, a connecting shaft 502 and a bevel gear 1 503. The spur gear 501 is arranged inside the main body 1 through the connecting shaft 502 and meshes with the rack 3. The end of the connecting shaft 502 away from the spur gear 501 is connected to the inner wall surface of the main body 1. The bevel gear 1 503 is fixedly arranged on the side of the spur gear 501 away from the connecting shaft 502 and meshes with the bevel gear 2 504 on the side above it. The bottom of the bevel gear 2 504 is rotatably connected to the bottom plate surface of the main body 1.

[0034] When in use, the design of the transmission assembly 5 can convert the up and down movement power of the rack 3 into rotational power, thereby enabling the pressure sensor 6 to be installed.

[0035] In one embodiment, see Figure 2 and Figure 4 The injection mechanism 4 also includes a liquid storage tank 402 and a liquid injection tube 403. The liquid storage tank 402 is fixedly arranged at the bottom of the bottom plate of the main body 1. The input end of the liquid injection tube 403 is fixedly connected to the bottom of the liquid storage tank 402. The output end of the liquid injection tube 403 passes through the bottom plate of the main body 1 and the inner ring of the bearing at the top of the pressure sensor 6, and penetrates into the interior of the pressure sensor 6. The bottom of the extrusion rod 401 has a rubber plug 404, and the rubber plug 404 is inserted into the upper end of the liquid storage tank 402. The liquid storage tank 402 is filled with magnetic fluid.

[0036] When in use, the design of the liquid injection mechanism 4 can inject magnetic fluid into the threaded connection. The magnetic fluid has the characteristics of magnetic properties and high temperature resistance and strong sealing.

[0037] In one embodiment, see Figure 2 and Figure 4 A liquid infusion tube 601 is provided inside the pressure sensor 6, and the liquid infusion tube 601 is connected to the output end of the injection tube 403. A liquid outlet 602 is provided on the surface of the bolt block at the bottom of the pressure sensor 6, and the liquid outlet 602 is connected to the liquid infusion tube 601.

[0038] When in use, the pressure sensor 6 can perform pressure detection on the combustion chamber of the gas turbine. When the air pressure in the combustion chamber of the gas turbine fluctuates, the pressure sensor 6 will transmit the air pressure in the combustion chamber of the gas turbine in real time.

[0039] In one embodiment, see Figure 1 and Figure 5 The main control module 2 is arranged on the side surface of the main body 1 , and the main control module 2 is electrically connected to the pressure sensor 6 .

[0040] When in use, the main control module 2 is mainly used to receive the air pressure value information transmitted by the pressure sensor 6, and analyze and transmit it.

[0041] In one embodiment, see Figure 5 The output end of the main control module 2 is electrically connected to the comparison module 201 , and the output end of the comparison module 201 is electrically connected to the alarm module 202 .

[0042] During use, the main control module 2 will transmit the initial preset air pressure value and the feedback air pressure value to the comparison module 201 for comparison. When the feedback air pressure value is lower or higher than the preset air pressure value, the alarm module 202 will be triggered to alarm so that the pressure sensor 6 can be replaced or repaired.

[0043] In one embodiment, see Figure 2 The upper section of the pressure sensor 6 is a square column structure, and its size matches the square through slot 505 .

[0044] When in use, the square through groove 505 can restrict the pressure sensor 6 to prevent the pressure sensor 6 from rotating and prevent the pressure sensor 6 from being unable to connect to the gas turbine combustion chamber.

[0045] In one embodiment, see Figure 1-2 The top end of the rack 3 passes through the upper portion of the exterior of the main body 1 , and a pad 302 is fixedly provided on the top end of the rack 3 .

[0046] During use, the pad 302 facilitates pressing and lifting the rack 3 .

[0047] In one embodiment, see Figure 2-3 The connecting shaft 502 is rotationally connected to the spur gear 501 through a bearing.

[0048] When in use, the connecting shaft 502 provides support for the spur gear 501 , and the spur gear 501 is a flat gear with a tooth line parallel to the central axis.

[0049] See also Figure 1-5 According to another aspect of the present invention, a method for using a combustion diagnostic device for a gas turbine is provided, comprising the following steps: S1: Align the pressure sensor 6 at the bottom of the main body 1 with the sensor connection hole of the gas turbine combustion chamber and press the pad 302 on the top of the rack 3. When the rack 3 is pressed down, it will drive the spur gear 501 of the transmission assembly 5 to start rotating, thereby driving the bevel gear 1 503 to rotate synchronously, and then the bevel gear 2 504 meshing on the side and bottom to start rotating, and finally drive the pressure sensor 6 to rotate, so that the threaded block at the bottom is threadedly connected to the sensor connection hole of the gas turbine combustion chamber.

[0050] S2: When the rack 3 is pressed down to the top of the strip groove 301 and fits with the upper surface of the extrusion rod 401, the continuous downward pressure of the rack 3 drives the extrusion rod 401 to move downward, so that the rubber stopper 404 squeezes the magnetic fluid in the liquid storage tank 402, driving the magnetic fluid to flow through the injection tube 403 to the inside of the pressure sensor 6, and then flows through the infusion tube 601 to the liquid outlet 602 and enters the threaded connection for sealing.

[0051] S3: When the pressure sensor 6 needs to be disassembled, the rack 3 is lifted to flip the second bevel gear 504 to realize the disassembly of the pressure sensor 6.

[0052] S4: After the pressure sensor 6 is installed, it can perform pressure detection on the gas turbine combustion chamber. When the air pressure in the gas turbine combustion chamber fluctuates, the pressure sensor 6 will transmit the air pressure in the gas turbine combustion chamber to the main control module 2 in real time. The main control module 2 will transmit the initial preset air pressure value and the feedback air pressure value to the comparison module 201 for comparison. When the feedback air pressure value is lower than or higher than the preset air pressure value, the alarm module 202 will trigger an alarm to replace or repair the pressure sensor 6.

[0053] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A combustion diagnostic device for a gas turbine, characterized in that: include: Main body (1) and main control module (2); A rack (3) is provided inside the main body (1) and is movable up and down, a strip groove (301) is provided on the side of the rack (3), a liquid injection mechanism (4) is inserted into the side of the rack (3), and a transmission assembly (5) is provided in meshing engagement with the tooth surface of the rack (3); The output end of the transmission assembly (5) is provided with a second bevel gear (504), a square through slot (505) is provided in the middle of the second bevel gear (504), and a pressure sensor (6) is inserted into the interior of the square through slot (505); The injection mechanism (4) comprises an extrusion rod (401), one end of the extrusion rod (401) close to the rack (3) is inserted into the strip groove (301), and the other end of the extrusion rod (401) is fixedly connected to the outer ring of the bearing at the top end of the pressure sensor (6); When the rack (3) is pressed down, the transmission assembly (5) is driven to output the rotational power through the bevel gear 2 (504) to drive the pressure sensor (6) to rotate. When the rack (3) is pressed down to the top of the strip groove (301) and fits with the upper surface of the extrusion rod (401), the continuous downward pressure of the rack (3) drives the extrusion rod (401) to move downward.

2. The combustion diagnostic device for a gas turbine according to claim 1, characterized in that: The transmission assembly (5) further comprises a spur gear (501), a connecting shaft (502) and a bevel gear 1 (503); the spur gear (501) is arranged inside the main body (1) via the connecting shaft (502) and meshes with the rack (3); an end of the connecting shaft (502) away from the spur gear (501) is connected to the inner wall surface of the main body (1); the bevel gear 1 (503) is fixedly arranged on a side of the spur gear (501) away from the connecting shaft (502) and meshes with the bevel gear 2 (504) on the upper side thereof; the bottom of the bevel gear 2 (504) is rotatably connected to the bottom plate surface of the main body (1).

3. The combustion diagnostic device for a gas turbine according to claim 1, characterized in that: The injection mechanism (4) further comprises a liquid storage tank (402) and a liquid injection pipe (403), wherein the liquid storage tank (402) is fixedly arranged at the bottom of the bottom plate of the main body (1), the input end of the liquid injection pipe (403) is fixedly connected to the bottom of the liquid storage tank (402), the output end of the liquid injection pipe (403) passes through the bottom plate of the main body (1) and the inner ring of the bearing at the top end of the pressure sensor (6), and penetrates into the interior of the pressure sensor (6), the bottom of the extrusion rod (401) is provided with a rubber plug (404), the rubber plug (404) is inserted into the interior of the upper end of the liquid storage tank (402), and the interior of the liquid storage tank (402) is filled with magnetic fluid.

4. The combustion diagnostic device for a gas turbine according to claim 3, characterized in that: A liquid infusion tube (601) is provided inside the pressure sensor (6), and the liquid infusion tube (601) is connected to the output end of the liquid injection tube (403). A liquid outlet (602) is provided on the surface of a bolt block at the bottom of the pressure sensor (6), and the liquid outlet (602) is communicated with the liquid infusion tube (601).

5. The combustion diagnostic device for a gas turbine according to claim 1, characterized in that: The main control module (2) is arranged on a side surface of the main body (1), and the main control module (2) is electrically connected to the pressure sensor (6).

6. The combustion diagnostic device for a gas turbine according to claim 5, characterized in that: The output end of the main control module (2) is electrically connected to the comparison module (201), and the output end of the comparison module (201) is electrically connected to the alarm module (202).

7. The combustion diagnostic device for a gas turbine according to claim 1, characterized in that: The upper section of the pressure sensor (6) is a square column structure, and its size matches the square through slot (505).

8. The combustion diagnostic device for a gas turbine according to claim 1, characterized in that: The top end of the rack (3) passes through to the upper portion of the exterior of the main body (1), and a pad (302) is fixedly provided on the top end of the rack (3).

9. The combustion diagnostic device for a gas turbine according to claim 2, characterized in that: The connecting shaft (502) and the spur gear (501) are rotatably connected via a bearing.

10. A method for using a combustion diagnostic device for a gas turbine, comprising: using the combustion diagnostic device for a gas turbine according to any one of claims 1 to 9, wherein: The method for using the combustion diagnostic device for a gas turbine comprises the following steps: S1: Align the pressure sensor (6) at the bottom of the main body (1) with the sensor connection hole of the gas turbine combustion chamber and press the pad (302) on the top of the rack (3). When the rack (3) is pressed down, the spur gear (501) of the transmission assembly (5) starts to rotate, driving the bevel gear 1 (503) to rotate synchronously, and then the bevel gear 2 (504) meshed at the side and bottom starts to rotate, and finally drives the pressure sensor (6) to rotate, so that the threaded block at the bottom is threadedly connected to the sensor connection hole of the gas turbine combustion chamber; S2: When the rack (3) is pressed down to the top of the strip groove (301) and fits with the upper surface of the extrusion rod (401), the continuous downward pressure of the rack (3) drives the extrusion rod (401) to move downward, so that the rubber plug (404) squeezes the magnetic fluid in the liquid storage tank (402) and drives the magnetic fluid to flow through the injection tube (403) to the inside of the pressure sensor (6), and then flows through the infusion tube (601) to the liquid outlet (602) and enters the threaded connection for sealing; S3: When the pressure sensor (6) needs to be disassembled, the rack (3) is pulled up to flip the bevel gear 2 (504) to realize the disassembly of the pressure sensor (6); S4: After the pressure sensor (6) is installed, the pressure detection work can be carried out on the combustion chamber of the gas turbine. When the air pressure in the combustion chamber of the gas turbine fluctuates, the pressure sensor (6) will transmit the air pressure in the combustion chamber of the gas turbine to the main control module (2) in real time. The main control module (2) will transmit the initial preset air pressure value and the feedback air pressure value to the comparison module (201) for comparison. When the feedback air pressure value is lower than or higher than the preset air pressure value, the alarm module (202) will be triggered to alarm, so that the pressure sensor (6) can be disassembled, replaced or repaired.

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