Total temperature and total pressure sampling composite test probe for gas turbine combustor test

Abstract

The utility model discloses a total temperature and total pressure sampling composite test probe for testing a gas turbine burner. The total temperature and total pressure sampling composite test probe comprises a support rod, a total temperature measuring point part, a total pressure measuring point part, a sampling measuring point part, a cooling chamber, a cooling water inlet, a cooling water outlet and a mounting seat, the total temperature measuring point component, the total pressure measuring point component and the sampling measuring point component are fixed on the front side of the supporting rod; the rear end of the supporting rod is also provided with a total temperature measuring point component lead interface, a total pressure measuring point interface and a sampling measuring point interface; a cooling cavity is formed in the supporting rod, an inlet of the cooling cavity is connected with a cooling water inlet, an outlet of the cooling cavity is connected with a cooling water outlet, and a cooling water channel is formed to cool the device; and the mounting seat is fixed at the rear end of the supporting rod and is fixedly connected with a mounting interface corresponding to the gas turbine combustor outlet measuring end through the mounting seat. According to the utility model, the integration level of measuring points can be improved, the blockage ratio of a measuring section is reduced, the test modification work of the test piece body is reduced, the processing cost is reduced, and the test preparation time and test acquisition hours are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of combustion testing and measurement technology, and in particular relates to a total temperature and total pressure sampling composite test probe for testing gas turbine burners. Background Technology

[0002] Currently, the measurement method used at the corresponding measurement location of the gas turbine burner involves separate installation of the total temperature and total pressure composite probe and the sampling probe, without integration at the measurement front end. This testing method increases the flow field blockage ratio of the measurement section, increases the need for modification and replacement of the test interface of the test specimen, increases the need for cooling water interfaces on the test bench, and increases the test preparation time and test acquisition time.

[0003] The total temperature and total pressure composite probes currently used at the corresponding measurement locations of gas turbine burners primarily employ a single set of coupled wires for temperature measurement, which results in insufficient strength reserves under high-temperature testing environments. Utility Model Content

[0004] In order to overcome the shortcomings of existing technologies, the purpose of this utility model is to propose a total temperature and total pressure sampling composite test probe for gas turbine burner testing, which improves the integration of measurement points, reduces the blockage ratio of measurement sections, reduces the testing and modification work of the test specimen body, reduces processing costs, and reduces test preparation time and test acquisition time.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a total temperature and total pressure sampling composite test probe for testing gas turbine burners, comprising: a support rod, a total temperature measuring point component, a total pressure measuring point component, a sampling measuring point component, a cooling chamber, a cooling water inlet, a cooling water outlet, and a mounting base;

[0006] At least one total temperature measuring point component, at least one total pressure measuring point component, and at least one sampling measuring point component are fixed to the front side of the support rod; a total temperature measuring point component lead wire interface, a total pressure measuring point interface, and a sampling measuring point interface are also provided at the rear end of the support rod.

[0007] A cooling chamber is set inside the support rod. The inlet of the cooling chamber is connected to the cooling water inlet, and the outlet of the cooling chamber is connected to the cooling water outlet, forming a cooling water passage to cool the device.

[0008] The mounting base is fixed to the rear end of the support rod and is fixedly connected to the mounting interface corresponding to the measuring end of the gas turbine burner outlet through the mounting base.

[0009] Furthermore, a temperature measuring device is installed at the lead interface of the total temperature measuring point component, a pressure measuring device is installed at the total pressure measuring point interface, and a gas analyzer is connected to the sampling measuring point interface.

[0010] Furthermore, the total temperature measuring point component includes a thermocouple wire, a shielding cover, and a ceramic tube. The thermocouple wire is inserted into a four-hole ceramic tube, and the shielding cover is located within the thermocouple wire, the shielding cover, and the ceramic tube. A vent hole is provided in the shielding cover.

[0011] Furthermore, two sets of B-type hybrid wires are used, and a common heat junction is formed by welding at the front ends of the two sets of B-type hybrid wires.

[0012] Furthermore, the total pressure measuring point component includes a shield and a pressure tapping tube. The shield is placed on the end of the pressure tapping tube, and a through hole is provided on the shield. The pressure tapping tube leads to the total pressure measuring point interface along the inside of the support rod.

[0013] Furthermore, the sampling measurement point component includes a sampling head and a sampling channel. The sampling head is placed on the front side of the support rod, and the sampling channel is placed inside the support rod. The sampling channel connects the sampling head and the sampling measurement point interface.

[0014] The beneficial effects of adopting this technical solution are:

[0015] This invention optimizes the structural design of the test probe by integrating the total temperature and total pressure measurement points with the sampling measurement points at the front end of the measurement, thereby reducing the overall blockage ratio of the measurement section. Furthermore, the designed water-cooling jacket connects to the cooling water of the test bench to cool the entire test probe, ensuring its safety and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the total temperature and total pressure sampling composite test probe for testing gas turbine burners according to the present invention;

[0017] Figure 2 This is a schematic diagram of the total temperature measuring point component in an embodiment of this utility model;

[0018] Among them, 1 is the support rod, 2 is the total temperature measuring point component, 3 is the total pressure measuring point component, 4 is the sampling measuring point component, 5 is the cooling water inlet, 6 is the cooling water outlet, 7 is the mounting base, 8 is the lead wire interface of the total temperature measuring point component, 9 is the total pressure measuring point interface, 10 is the sampling measuring point interface; 21 is the thermocouple wire, 22 is the shielding cover, and 23 is the ceramic tube. Detailed Implementation

[0019] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described below with reference to the accompanying drawings.

[0020] In this embodiment, see Figure 1 As shown, a total temperature and total pressure sampling composite test probe for testing gas turbine burners includes: a support rod 1, a total temperature measuring point component 2, a total pressure measuring point component 3, a sampling measuring point component 4, a cooling chamber, a cooling water inlet 5, a cooling water outlet 6, and a mounting base 7.

[0021] At least one total temperature measuring point component 2, at least one total pressure measuring point component 3, and at least one sampling measuring point component 4 are fixed to the front side of the support rod 1; at the rear end of the support rod 1, a total temperature measuring point component lead wire interface 8, a total pressure measuring point interface 9, and a sampling measuring point interface 10 are also provided.

[0022] A cooling chamber is set inside the support rod 1. The inlet of the cooling chamber is connected to the cooling water inlet 5, and the outlet of the cooling chamber is connected to the cooling water outlet 6, forming a cooling water passage to cool the device.

[0023] Mounting base 7 is fixed to the rear end of support rod 1 and is fixedly connected to the mounting interface corresponding to the measuring end of the gas turbine burner outlet through mounting base 7.

[0024] A temperature measuring device is installed on the lead interface 8 of the total temperature measuring point component, a pressure measuring device is installed on the total pressure measuring point interface 9, and a gas analyzer is connected to the sampling measuring point interface 10.

[0025] The total temperature and pressure measuring points, sampling measuring points, and support rod 1 of this invention are all located within the high-temperature flow field of the outlet measurement section of a gas turbine single-nozzle burner test piece during operation. The working environment is harsh, placing high demands on the strength and reliability of support rod 1. Therefore, a cooling chamber is designed on support rod 1, connected to a cooling water inlet at the rear end of the device. During operation, cooling water from the test bench is introduced into the cooling chamber of this invention through the cooling water inlet and then exited from the other side of the cooling water inlet. This water cooling method effectively cools support rod 1 within the high-temperature flow field of the outlet measurement section of a gas turbine single-nozzle burner test piece, ensuring the strength and reliability of the device.

[0026] As an optimization of the above embodiments, such as Figure 2 As shown, the total temperature measuring point component 2 includes a thermocouple wire 21, a shield 22, and a ceramic tube 23. The thermocouple wire 21 is inserted into the ceramic tube 23 for limiting and fixing. The shield 22 is located between the thermocouple wire 21, the shield 22, and the ceramic tube 23. A vent hole is provided in the shield 22. The shield 22 protects the entire temperature measuring point structure and provides a confined airflow environment.

[0027] Specifically, the total temperature measuring point component 2 consists of a 0.5mm diameter Type B thermocouple wire (platinum-rhodium 30-platinum-rhodium 6), a shield, and a four-hole ceramic tube. The shield and the four-hole ceramic tube provide support and protection for the Type B thermocouple wire and impede the measurement medium, reducing speed and thermal conductivity errors and improving the accuracy of temperature measurement. The structure of the total temperature measuring point is shown below. Figure 2 .

[0028] Two sets of type B thermocouple wires are used, with a shared thermal junction formed by welding at the front ends. This effectively improves the strength of the thermocouple wires under the high-temperature measurement environment of the outlet measurement section of a single-nozzle burner test piece of a gas turbine, ensuring the lifespan of the total temperature measurement point. The thermal junction of the type B thermocouple wire is formed by fusing two different metal wires; one end is called the reference end, and the other end is called the measuring end. The thermoelectric potential formed by the temperature difference between the reference end and the measuring end is measured. Utilizing the thermoelectric properties of thermocouple wire x, the temperature of the outlet measurement section of the single-nozzle burner test piece of a gas turbine is measured.

[0029] As an optimized embodiment, the total pressure measuring point component 3 includes a shield and a pressure tapping tube. The shield is placed on the end of the pressure tapping tube and has a through hole. The pressure tapping tube extends along the inside of the support rod 1 to the pressure measuring point interface 9. The measuring medium enters the pressure tapping tube through the through hole of the shield and is then introduced into the pressure measuring device through the pressure tapping tube to convert the physical pressure signal into an engineering value.

[0030] As an optimized solution of the above embodiment, the sampling point component 4 includes a sampling head and a sampling channel. The sampling head is placed on the front side of the support rod 1, and the sampling channel is placed inside the support rod 1. The sampling channel connects the sampling head and the sampling point interface 10.

[0031] After the test begins, under the test conditions, due to the velocity of the test medium itself, it will enter the gas analyzer through the sampling channel and undergo subsequent processing and analysis in the gas analyzer. The gas analyzer can be an existing conventional gas analyzer.

[0032] This invention proposes a composite test probe for total temperature and total pressure sampling in gas turbine burner testing. It is used for measuring and sampling the total temperature and total pressure of the flow field in the outlet measurement section of the gas turbine burner test piece, providing data support for evaluating the performance of the test piece.

[0033] 1. By integrating all three types of measuring points into the test front end, the blockage ratio of the measuring section can be effectively reduced by approximately 50% while meeting the same testing requirements;

[0034] 2. This utility model only requires modification of the test interface on the test specimen body. Under the premise of meeting the same test requirements, it can effectively reduce the test modification work on the test specimen body by about 50%.

[0035] 3. This utility model has a high degree of integration of measurement points, reduces the amount of material in the main body of the test probe, and relatively reduces the number of processing steps, which can effectively reduce processing costs.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite test probe for total temperature and total pressure sampling for gas turbine burner testing, characterized in that, include: Support rod (1), total temperature measuring point component (2), total pressure measuring point component (3), sampling measuring point component (4), cooling chamber, cooling water inlet (5), cooling water outlet (6) and mounting base (7); At least one total temperature measuring point component (2), at least one total pressure measuring point component (3) and at least one sampling measuring point component (4) are fixed on the front side of the support rod (1); at the rear end of the support rod (1), a total temperature measuring point component lead wire interface (8), a total pressure measuring point interface (9) and a sampling measuring point interface (10) are also provided; A cooling chamber is set inside the support rod (1). The inlet of the cooling chamber is connected to the cooling water inlet (5), and the outlet of the cooling chamber is connected to the cooling water outlet (6), forming a cooling water passage to cool the device. The mounting base (7) is fixed to the rear end of the support rod (1) and is fixedly connected to the mounting interface corresponding to the gas turbine burner outlet measuring end through the mounting base (7).

2. The total temperature and total pressure sampling composite test probe for gas turbine burner testing according to claim 1, characterized in that, A temperature measuring device is installed on the lead interface (8) of the total temperature measuring point component, a pressure measuring device is installed on the total pressure measuring point interface (9), and a gas analyzer is connected to the sampling measuring point interface (10).

3. The total temperature and total pressure sampling composite test probe for gas turbine burner testing according to claim 1, characterized in that, The total temperature measuring point component (2) includes a thermocouple wire (21), a shield (22) and a ceramic tube (23). The thermocouple wire (21) is inserted into the ceramic tube (23). The shield (22) is located between the thermocouple wire (21), the shield (22) and the ceramic tube (23). A vent hole is provided in the shield (22).

4. The total temperature and total pressure sampling composite test probe for gas turbine burner testing according to claim 3, characterized in that, Two sets of B-type hybrid wires are used, and a common heat junction is formed by welding at the front ends of the two sets of B-type hybrid wires.

5. A total temperature and total pressure sampling composite test probe for gas turbine burner testing according to claim 1, characterized in that, The total pressure measuring point component (3) includes a shield and a pressure tapping tube. The shield is placed on the end of the pressure tapping tube and has a through hole. The pressure tapping tube runs along the inside of the support rod (1) to the total pressure measuring point interface (9).

6. The total temperature and total pressure sampling composite test probe for gas turbine burner testing according to claim 1, characterized in that, The sampling point component (4) includes a sampling head and a sampling channel. The sampling head is placed on the front side of the support rod (1), and the sampling channel is placed inside the support rod (1). The sampling channel connects the sampling head and the sampling point interface (10).

Images