Gas sample gas heat preservation assembly and combustion chamber outlet rotation measuring device

Abstract

According to the fuel gas sample gas heat preservation assembly arranged in the combustion chamber outlet rotating measuring device, the combustion chamber outlet rotating measuring device comprises a rotating shaft, a fuel gas sampling rake and a fuel gas sampling pipe, the inlet end of the fuel gas sampling pipe is communicated with the fuel gas sampling rake, and the heat preservation assembly comprises a liquid inlet channel and a liquid outlet pipeline; the rotating shaft comprises an inner ring cavity and an outer ring cavity, the inner ring cavity is communicated with the liquid inlet channel, and the outer ring cavity is communicated with the liquid outlet pipeline; an inlet and an outlet of the liquid supply pipeline are respectively communicated with the inner ring cavity and the outer ring cavity, and the liquid supply pipeline is arranged to pass through the gas sampling rake; the gas tube bundle chamber is arranged on the periphery of the outer ring cavity; wherein the gas sampling pipe is arranged to penetrate through the outer ring cavity, the gas pipe bundle cavity and the liquid inlet pipeline in sequence. The heat preservation assembly can achieve a good heat preservation effect on the fuel gas sample gas. The invention further provides a combustion chamber outlet rotation measuring device.

Description

Technical Field

[0001] The invention relates to the field of combustion chamber testing, and in particular to the field of thermal insulation. Background Art

[0002] With the improvement of environmental protection laws, the pollutant emission index at the combustion chamber outlet is an important parameter in the design of gas turbine engine combustion chambers, and the research on low-pollution combustion chambers has become an important development direction for gas turbines. According to ICAO specifications, in order to prevent the condensation of water vapor and unburned hydrocarbons (UHC) in the sample gas, the gas sample temperature is required to be maintained at 165℃±15℃. In the combustion chamber tests of aircraft engines and gas turbines, electric heating pipes are generally used to insulate the gas pipes.

[0003] For full-ring combustion chamber test pieces, a rotating measuring device is generally used to scan and sample the combustion chamber outlet. The gas sampling pipe in the rotating measuring device cannot be insulated with electric heating tape. At present, only the gas pipe outside the rotating measuring device is insulated with electric heating tape, and it is impossible to take insulation measures for the gas pipe inside the rotating measuring device. In addition, for some small state tests with low temperature and low flow, it is impossible to ensure that the gas temperature in the gas pipe inside the rotating measuring device is higher than 165℃±15℃, which cannot meet the ICAO specifications. Summary of the invention

[0004] An object of the present invention is to provide a fuel gas sample heat preservation assembly which can effectively heat the fuel gas sample in a combustion chamber rotating measuring device.

[0005] To achieve the above-mentioned purpose, a gas sample insulation component is arranged in a combustion chamber outlet rotating measuring device, the combustion chamber outlet rotating measuring device includes a rotating shaft, a gas sampling rake and a gas sampling tube, the inlet end of the gas sampling tube is connected to the gas sampling rake, the insulation component includes a liquid inlet channel and a liquid outlet pipe; the rotating shaft includes an inner ring cavity and an outer ring cavity, the inner ring cavity is connected to the liquid inlet channel, and the outer ring cavity is connected to the liquid outlet pipe; the insulation component also includes: a liquid supply pipeline, the inlet and outlet are respectively connected to the inner ring cavity and the outer ring cavity, and are arranged to pass through the gas sampling rake; a gas tube bundle chamber, which is arranged on the periphery of the outer ring cavity; wherein the gas sampling tube is arranged to pass through the outer ring cavity, the gas tube bundle chamber and the liquid inlet pipe in sequence.

[0006] In one or more embodiments, the gas sampling tubes are spirally distributed in the gas tube bundle chamber.

[0007] In one or more embodiments, the outer ring cavity is further provided with a leakage hole to allow the insulation liquid in the outer ring cavity to leak into the gas tube bundle chamber, and the gas tube bundle chamber is connected to the liquid outlet pipe through a pipeline.

[0008] In one or more embodiments, a sealing ring is further provided in the gas tube bundle chamber.

[0009] In one or more embodiments, the combustion chamber outlet rotation measurement device further comprises a thermocouple rake disposed on the wobble plate, and the liquid supply pipeline is further configured to pass through the thermocouple rake.

[0010] In one or more embodiments, the insulation liquid is water.

[0011] In one or more embodiments, the combustion chamber outlet rotation measuring device also includes a shell and a wobble plate, the wobble plate is connected to the shell through the rotating shaft, the liquid inlet channel and the liquid outlet pipe pass through the shell, and the gas sampling rake is arranged on the wobble plate.

[0012] In one or more embodiments, the bearing of the rotating shaft is disposed in the gas tube bundle chamber.

[0013] Another object of the present invention is to provide a combustion chamber outlet rotation measurement device, which includes the above-mentioned fuel gas sample insulation component.

[0014] The gas sample insulation component uses insulation liquid to insulate the gas sampling tube in the outer ring cavity to ensure that the temperature of the gas sampling meets the test range. The gas sampling rake can also be cooled by this part of the insulation liquid to achieve a dual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a schematic diagram of the combustion chamber outlet rotation measurement device.

[0017] Symbols and Markings

[0018] 1. Outer shell

[0019] 2 Inner shell

[0020] 3. Plate

[0021] 4 Gas sampling rake

[0022] 5 Thermocouple Rake

[0023] 6 rods

[0024] 7 Rotation axis

[0025] 8 Gas tube bundle chamber

[0026] 9 Gas sampling tube

[0027] 10 Liquid supply line

[0028] 11 Liquid inlet channel

[0029] 12 Liquid outlet pipe

[0030] 18 Gas Analyzer

[0031] 71 Leakage hole

[0032] 72 Inner ring cavity

[0033] 73 Outer ring cavity

[0034] 61 First Pole

[0035] 62 Second pole

[0036] 81 Bearings

[0037] 82 Sealing ring

[0038] 91 Spiral

[0039] 101 First pipeline

[0040] 102 Second pipeline 103 Third pipeline DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0042] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0043] The full-annular combustion chamber outlet temperature is generally measured using a rotating measuring device facing the combustion chamber outlet, such as Figure 1 As shown. The rotating measuring device includes a rotating shaft 7, a gas sampling rake 4, a thermocouple rake 5 and a gas sampling tube 9. The inlet end of the gas sampling tube 9 is connected to the gas sampling rake 4, and the gas sampling rake 4 can collect the gas sample G and lead the gas sample to the gas pipe 9. The outlet end of the gas sampling tube 9 is connected to the gas analyzer 18 for pollution emission measurement to achieve real-time analysis of the gas. The thermocouple rake 5 is used to scan and measure the combustion chamber outlet. The gas sampling rake 4 and the thermocouple rake 5 are arranged on a rotatable pendulum plate 3. Under the rotation of the pendulum plate 3, the gas sampling rake 4 can realize circumferential rotation sampling to achieve the purpose of recording the full-ring performance parameters.

[0044] However, the gas sampling tube 9 in the rotating measuring device generally does not have appropriate insulation measures. In a low state, the sample gas temperature will be lower than 165°C±15°C required by the ICAO specification, and water vapor and unburned hydrocarbons in the sample gas will condense, resulting in errors in the gas composition analysis.

[0045] The fuel gas sample insulation component disclosed in the present invention is arranged in the combustion chamber outlet rotating measuring device. By using an insulation liquid such as water to insulate the sample gas in the full-ring combustion chamber rotating measuring device, the sample gas temperature is ensured to be higher than the ICAO specification requirements, thereby reducing the measurement error of the combustion chamber component concentration.

[0046] Continue to refer to Figure 1 As shown, the insulation component includes a liquid inlet channel 11 and a liquid outlet pipe 12, which are used to supply and output insulation liquid respectively, as shown in directions I and O.

[0047] The rotating shaft 7 includes an inner ring cavity 72 and an outer ring cavity 73. The inner ring cavity 72 is connected to the liquid inlet channel 11, and the outer ring cavity 73 is connected to the liquid outlet channel 12. Figure 1 The first pipeline 101 is connected to the liquid inlet channel 11, and the outer ring cavity 73 is connected to the liquid outlet pipe 12 through the second pipeline 102, which is used to flow the insulation liquid such as water. That is, the rotating shaft 7 has two layers of shells, which separate the rotating shaft into two layers of inner and outer heating water flow channels, and the insulation liquid enters from the inner water channel of the rotating shaft.

[0048] In some embodiments, the gas sampling temperature is within the range of 165°C ± 15°C, so the temperature of the insulation liquid is also within the range of 165°C ± 15°C. Those skilled in the art will appreciate that the gas sampling temperature includes but is not limited to the range of 165°C ± 15°C, and the temperature of the insulation liquid should be substantially consistent with the gas sampling temperature to achieve a more accurate insulation effect.

[0049] The heat preservation assembly further includes a liquid supply pipeline 10 and a gas tube bundle chamber 8 .

[0050] The inlet and outlet of the liquid supply pipeline 10 are respectively connected with the inner ring cavity 72 and the outer ring cavity 73, including both the outgoing path and the returning path, and are arranged to pass through the gas sampling rake 4, and can also be arranged to pass through the thermocouple rake 5. The temperature of the pendulum of the heat preservation liquid near the outlet side of the combustion chamber is relatively high, and the temperature of the gas sampling rake 4 and the thermocouple rake 5 is also relatively high relative to the gas. The temperature of the gas at the outlet of the combustion chamber facing the measuring rake can be as high as 2000K or more, so the heat preservation liquid can keep the gas sample warm and can also play a role in cooling the gas sampling rake body, and has both heat preservation and cooling functions.

[0051] The gas tube bundle chamber 8 is arranged on the outer periphery of the outer ring cavity 73; wherein the gas sampling tube 9 is arranged to sequentially pass through the outer ring cavity 73, the gas tube bundle chamber 8 and the liquid inlet pipe 11. After cooling the rake body of the gas sampling rake 4, the heat preservation liquid flows back to the outer ring cavity 73 of the rotating shaft 7 through the loop of the liquid supply pipe 10, heats the gas sampling tube 9, and finally flows back to the liquid outlet pipe 12 through the second pipe 102.

[0052] Preferably, the gas sampling tube 9 is spirally distributed in the gas tube bundle chamber 8. Since one end of the gas sampling tube 9 is connected to the gas sampling rake 4, the gas sampling tube rotates together with the gas sampling rake 4 during the rotation of the swing plate 3, and the outlet position of the other end is fixed. In order to ensure that the gas sampling tube 9 is not pulled and damaged or entangled with other components during the rotation process, the gas tube in the gas tube bundle chamber 8 is set to a spiral shape 91, such as spirally wound around the rotation axis. The spiral-shaped gas sampling tube can ensure that the outlet position of the downstream gas tube remains substantially unchanged when the upstream gas tube rotates.

[0053] In order to ensure the heat preservation of the gas in the gas tube bundle chamber 8, the outer ring cavity 73 is further provided with a leakage hole 71, so that the heat preservation liquid in the outer ring cavity 73 can leak into the gas tube bundle chamber 8, and the gas tube bundle chamber 8 is connected with the liquid outlet pipeline 12 through the third pipeline 103. In this way, a small amount of heat preservation liquid flows from the outer ring cavity 73 into the gas tube bundle chamber 8, and the heat preservation liquid is used to keep the gas sample warm.

[0054] On the basis of the above-mentioned embodiment, an O-ring 82 is further provided in the gas tube bundle chamber 8 to ensure that the insulation liquid does not leak.

[0055] Continue to refer to Figure 1 As shown, the combustion chamber outlet rotation measuring device also includes a housing and a wobble plate 3, the housing includes an inner housing 2 and an outer housing 1, and the inner housing 2 and the outer housing 1 are connected by two sets of front and rear support rods 6. The wobble plate 3 is connected to the housing through a rotating shaft 7, and a gas sampling rake 4 and a thermocouple rake 5 are arranged on the wobble plate 3.

[0056] The liquid inlet channel 11 and the liquid outlet pipe 12 penetrate the shell. Figure 1 In the illustrated embodiment, the insulation liquid enters the rotation measuring device through the liquid inlet channel 11 in the first support rod 61 and flows out of the rotation measuring device through the liquid outlet channel 12 in the second support rod 62 .

[0057] In addition, the bearing 81 of the rotating shaft may also be arranged in the gas tube bundle chamber 8 .

[0058] Therefore, the above-mentioned gas sample insulation component can meet the needs of combustion chamber tests, solve the problem of no insulation measures for the gas sampling tube in the full-ring combustion chamber rotating measuring device, and avoid the sample gas being overcooled to cause condensation of water vapor or unburned hydrocarbons, which will cause changes in the sample gas composition and affect the sampling results, thereby ensuring the smooth implementation of the test and ensuring compliance with ICAO standards, thereby improving the test quality.

[0059] Combined with the introduction of the above-mentioned gas sample insulation component, it can also be understood that a combustion chamber outlet rotating measuring device using the above-mentioned gas sample insulation component can obtain gas with more precise temperature, thereby improving the accuracy of the test results.

[0060] It should be noted that the above content uses words such as "first" and "second" to limit components, which is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0061] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0062] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A gas sample heat preservation component, arranged in a combustion chamber outlet rotating measuring device, the combustion chamber outlet rotating measuring device comprising a rotating shaft, a gas sampling rake and a gas sampling tube, the inlet end of the gas sampling tube being connected to the gas sampling rake, the heat preservation component comprising a liquid inlet channel and a liquid outlet pipe; characterized in that: The rotating shaft comprises an inner annular cavity and an outer annular cavity, the inner annular cavity is communicated with the liquid inlet channel, and the outer annular cavity is communicated with the liquid outlet pipe; The insulation assembly also includes: A liquid supply pipeline, the inlet and the outlet of which are respectively connected to the inner ring cavity and the outer ring cavity, and are arranged to pass through the gas sampling rake; The gas tube bundle chamber is arranged at the outer periphery of the outer ring cavity; wherein the gas sampling tube is arranged to pass through the outer ring cavity, the gas tube bundle chamber and the liquid inlet pipe in sequence.

2. The fuel gas sample insulation assembly according to claim 1, characterized in that: The gas sampling tubes are distributed in the gas tube bundle chamber in a spiral shape.

3. The fuel gas sample insulation assembly according to claim 1, characterized in that: The outer ring cavity is also provided with a liquid leakage hole to allow the insulation liquid in the outer ring cavity to leak into the gas tube bundle chamber, and the gas tube bundle chamber is connected with the liquid outlet pipe through a pipeline.

4. The fuel gas sample insulation assembly according to claim 3, characterized in that: A sealing ring is also provided in the gas tube bundle chamber.

5. The fuel gas sample insulation assembly according to claim 1, characterized in that: The combustion chamber outlet rotation measuring device further comprises a thermocouple rake arranged on the wobble plate, and the liquid supply pipeline is further arranged to pass through the thermocouple rake.

6. The fuel gas sample insulation assembly according to claim 1, characterized in that: The insulation liquid is water.

7. The fuel gas sample insulation assembly according to claim 1, characterized in that: The combustion chamber outlet rotation measuring device also includes a shell and a wobble plate, the wobble plate is connected to the shell through the rotating shaft, the liquid inlet channel and the liquid outlet pipe pass through the shell, and the gas sampling rake is arranged on the wobble plate.

8. The fuel gas sample heat preservation assembly according to claim 7, characterized in that: The bearing of the rotating shaft is arranged in the gas tube bundle chamber.

9. A combustion chamber outlet rotation measuring device, characterized in that: It comprises the fuel gas sample insulation assembly as described in claims 1-8.

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