A rotating disc cooling structure for a combustion chamber outlet temperature measuring device

Abstract

A rotating disc cooling structure for a combustion chamber outlet temperature measuring device, comprising a disc body assembly and a front cover plate assembly; the front cover plate assembly is internally provided as a hollow structure to form a cover plate water cavity, and a cover plate water inlet and multiple cover plate water outlets are arranged on one side of the front cover plate assembly and are in communication with the cover plate water cavity; the disc body assembly is an annular structure, and a disc body water cavity is arranged in the disc body assembly; multiple disc body water inlets and multiple disc body water outlets are arranged on the inner wall of the disc body assembly and are in communication with the disc body water cavity; the number of disc body water inlets is the same as that of cover plate water outlets; the cover plate water inlet is connected with a water inlet main pipe; the multiple cover plate water outlets are connected with the multiple disc body water inlets through pipelines; and the multiple disc body water outlets are connected to a water outlet main pipe after being collected. The rotating disc cooling structure only has one water inlet main pipe and one water outlet main pipe, and the number is small, thereby reducing the problems of pipe extrusion and shear rupture caused by the rotation of the rotating temperature measuring device due to too many water pipes when the rotating temperature measuring device works.

Description

Technical Field

[0001] This invention relates to the field of aero-engine testing equipment technology, and in particular to a rotating disk cooling structure for a combustion chamber outlet temperature measuring device. Background Technology

[0002] Ground testing of aero-engines and components is essential for engine design and development, used to measure various performance parameters. Measurement of combustor exit parameters provides a basis for combustor improvement and development; temperature is one of the mandatory parameters for obtaining performance parameters such as combustor exit temperature field and efficiency.

[0003] Aero-engine combustors have high outlet temperatures and numerous measuring points. The arrangement of these measuring points must meet flow channel blockage ratio requirements, making direct measurement using multiple temperature probes difficult. Rotary temperature sensors, as a displacement mechanism, can achieve low blockage ratios and high measurement density. Since the rotating disk of the rotary temperature sensor is in direct contact with the high-temperature gas at the combustor outlet, cooling the rotating disk is crucial.

[0004] The existing rotating temperature sensor's cooling structure is a water-cooled structure, with a main water inlet pipe supplying water to the front cover assembly and the disc assembly. The front cover and disc are connected by eight water pipes. The disc assembly's structural design directs cooling water towards the high-temperature gas passage, which easily leads to scale buildup and blockage at the spray nozzles, reduced cooling water flow within the disc, and vaporization of the cooling water under high temperatures, increasing internal pressure and ultimately causing structural damage such as bulging of the front cover. The front cover and disc are connected by multiple water pipes, and the disc assembly uses multiple return pipes for water return. The numerous water pipes within the internal cavity create a complex structure. When the rotating temperature sensor rotates, the support plate can easily exert shear pressure on the water pipes in the confined space, causing pipe rupture. Therefore, a simpler rotating disc water-cooling structure that is less prone to scale buildup and requires fewer water pipes is needed to meet the rotating disc's cooling requirements. Summary of the Invention

[0005] The main objective of this invention is to propose a rotating disk cooling structure for a combustion chamber outlet temperature measuring device, aiming to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention proposes a rotating disk cooling structure for a combustion chamber outlet temperature measuring device, comprising a disk assembly and a front cover plate assembly disposed at the end of the disk assembly; the front cover plate assembly is configured with a hollow structure to form a cover plate water cavity, and a cover plate inlet and multiple cover plate return inlets connected to the cover plate water cavity are disposed on one side of the front cover plate assembly; the disk assembly is an annular structure with a disk water cavity disposed therein, and multiple disk inlets and multiple disk return inlets connected to the disk water cavity are disposed on the inner wall of the disk assembly; the number of disk inlets is the same as the number of cover plate return inlets; the cover plate inlets are connected to a main water inlet pipe; the multiple cover plate return inlets are connected to the multiple disk inlets via pipes; the multiple disk return inlets converge and are connected to a main return pipe.

[0007] Preferably, there are two cover plate return inlets; the cover plate inlet is located at the center of one side of the front cover plate assembly, and the two cover plate return inlets are symmetrically arranged at 180° near the edge of the front cover plate assembly.

[0008] Preferably, a guide plate assembly is provided inside the cover water cavity of the front cover plate assembly to divide the cover water cavity into a meandering liquid channel.

[0009] Preferably, the guide plate assembly consists of multiple concentric annular guide plates, each annular guide plate having two guide plate notches symmetrically arranged at 180°; the lines connecting the guide plate notches on adjacent annular guide plates are perpendicular to each other; the line connecting the two guide plate notches on the outermost annular guide plate is perpendicular to the line connecting the two cover plate return inlets.

[0010] Preferably, among the multiple concentrically arranged annular guide plates, the opening angle assembly of the guide plate notches decreases from the inside to the outside.

[0011] Preferably, the disc assembly has two disc inlets and two disc outlets, which are arranged symmetrically in pairs; the two disc outlets converge at the tee joint and are then connected to the main return pipe.

[0012] Preferably, the front cover assembly includes a first cover and a second cover; a cavity is provided on one side of the first cover, and the second cover is welded to and seals the opening of the cavity to form the cover water cavity; a DN20 quick connector is welded to the second cover to form the cover water return port; a reducer is welded to the second cover, and a DN25 quick connector is welded to the inlet end of the reducer, the reducer and the DN25 quick connector forming the cover water inlet; the disc water inlet and the cover water return port both use quick connectors of the same type as the cover water return port.

[0013] Preferably, a recessed platform is provided on the end face of the disc assembly, the front cover plate assembly is snapped into the recessed platform and detachably connected to the disc assembly by screws, and a copper gasket is provided between the front cover plate assembly and the bottom wall of the recessed platform.

[0014] Preferably, a rear cover plate is fixed to the end of the disk assembly, and bolt holes are evenly distributed in a ring on the rear cover plate.

[0015] Preferably, both the front cover assembly and the disc assembly are made of GH3044.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0017] (1) In this invention, the cover plate inlet on the front cover plate assembly is connected to the main water inlet pipe, and the cover plate return port on the front cover plate assembly is connected to the plate inlet on the plate assembly through a pipe. The plate return port on the plate assembly is collected and connected to the return water main pipe, so that the entire rotating plate cooling structure has only one main water inlet pipe and one main water return pipe, which is less in number. This reduces the problems of pipe compression and shearing cracking caused by the rotation of the rotating temperature measuring device when it is working due to the large number of water pipes.

[0018] (2) In this invention, the disc assembly uses a water return structure instead of a water spray structure to solve the problem of water flow speed reduction under high temperature and high pressure causing damage to the disc structure and a decrease in cooling capacity; it can enable the rotating disc of the rotating temperature measuring device to work well under the conditions of combustion chamber outlet temperature of 1600℃ and pressure of 2.5MPa.

[0019] (3) In this invention, there is only one main inlet pipe and one main return pipe, which is less in number, thus simplifying the cooling water path and saving space.

[0020] (4) In this invention, the front cover plate assembly is provided with a guide plate assembly to divide the cover plate water cavity into a meandering liquid channel, thereby reducing the flow resistance of the cooling water, making the flow rate fast and uniform, improving the cooling effect, and solving the problems of low cooling water flow rate, bulging of the front cover plate assembly structure, and reduced cooling effect.

[0021] (5) In this invention, the front cover plate assembly and the disc assembly are connected as one piece by bolts, which is simple and compact, reducing the space occupied by the device. At the same time, a copper gasket is provided at the mating position of the front cover plate assembly and the disc assembly. The copper gasket can fill the gap between the two and ensure their sealing. The copper gasket has excellent wear resistance and can be used for a long time without significant wear. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the rotating disk cooling structure for the combustion chamber outlet temperature measuring device provided by the present invention.

[0024] Figure 2 This is a schematic diagram of the front cover assembly in this invention;

[0025] Figure 3 for Figure 2 Sectional view along AA;

[0026] Figure 4 This is a schematic diagram of the disk assembly in this invention;

[0027] Figure 5 for Figure 4 A sectional view along the middle edge BB;

[0028] Figure 6 for Figure 4 Sectional view along CC

[0029] Figure 7 for Figure 4 A sectional view along the middle DD.

[0030] Reference numerals: 100, Front cover assembly; 101, Cover water cavity; 102, Cover inlet; 103, Cover return outlet; 104, Liquid channel; 105, Annular guide plate; 106, First cover plate; 107, Second cover plate; 108, Reducer; 109, DN25 quick connector; 110, Guide plate notch; 200, Disc assembly; 201, Disc water cavity; 203, Disc inlet; 204, Disc return outlet; 205, Rear cover plate; 300, Main inlet pipe; 301, Main return pipe; 302, Pipe; 304, T-joint; 305, Copper gasket. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0034] As shown in the accompanying drawings, a rotating disk cooling structure for a combustion chamber outlet temperature measuring device includes a disk assembly 200 and a front cover plate assembly 100 disposed at the end of the disk assembly 200. The front cover plate assembly 100 has a hollow structure inside, forming a cover plate water cavity 101. A cover plate inlet 102 and multiple cover plate return inlets 103 communicating with the cover plate water cavity 101 are provided on one side of the front cover plate assembly 100. The disk assembly 200 has an annular structure, and its interior is provided with... The assembly 200 has a water chamber 201 and multiple water inlets 203 and multiple water outlets 204 connected to the water chamber 201. The number of water inlets 203 is the same as the number of water outlets 103 on the cover plate. The water inlets 102 on the cover plate are connected to the main water inlet pipe 300. The multiple water outlets 103 on the cover plate are connected to the multiple water inlets 203 through pipes 302. The multiple water outlets 204 on the cover plate are collected and connected to the main water outlet pipe 300.

[0035] Through the above structure, the cover plate inlet 102 on the front cover plate assembly 100 is connected to the main water inlet pipe 300, and the cover plate return inlet 103 on the front cover plate assembly 100 is connected to the disc inlet 203 on the disc assembly 200 via pipe 302. Furthermore, the disc return inlets 204 on the disc assembly 200 converge and connect to the return water main pipe 301. This results in the entire rotating disc cooling structure having only one main water inlet pipe 300 and one main return water pipe 301, reducing the number of pipes and minimizing problems such as pipe compression and shearing cracking caused by the rotation of the rotating temperature measuring device during operation. Additionally, the return water structure formed by the disc water cavity 201 on the disc assembly 200 replaces the traditional water spray structure, solving the problem of water flow deceleration under high temperature and pressure causing damage to the disc structure and reduced cooling capacity. This allows the rotating disc of the rotating temperature measuring device to operate better under conditions of 1600℃ combustion chamber outlet temperature and 2.5MPa pressure.

[0036] Combination Figure 2 As shown, there are two cover plate return inlets 103; the cover plate inlet 102 is located at the center of one side of the front cover plate assembly 100, and the two cover plate return inlets 103 are symmetrically arranged at 180° near the edge of the front cover plate assembly 100. Water enters through the cover plate inlet 102 and flows out through the cover plate return inlet 103. Positioning the two cover plate return inlets 103 near the edge of the front cover plate assembly 101 allows cooling water to flow more effectively to any location within the cover plate water chamber 101.

[0037] Furthermore, to better direct the cooling water to any location within the cover plate water cavity 101, a guide plate assembly is provided inside the cover plate water cavity 101 of the front cover plate assembly 100. This assembly divides the cover plate water cavity 101 into a meandering liquid channel 104. After entering through the cover plate inlet 102, the cooling water flows through the meandering liquid channel 104 before exiting through the cover plate outlet 103. Specifically, the guide plate assembly consists of multiple concentric annular guide plates 105, each annular guide plate 105 having two guide plate notches 110 symmetrically arranged at 180°. The lines connecting the guide plate notches 110 on adjacent annular guide plates 105 are perpendicular to each other. The cooling water flow direction is shown by the arrows in the figure, with a branching effect formed at each guide plate notch 110. This shape of the guide plate assembly reduces the cooling water flow resistance, increases the flow velocity, and improves the cooling effect. Furthermore, the line connecting the two guide plate notches 110 on the outermost annular guide plate 105 is perpendicular to the line connecting the two cover plate return ports 103. The entire guide plate assembly structure allows the liquid channel 104 to form a symmetrical structure, which helps to ensure that the flow rate entering the two cover plate return ports 103 remains consistent.

[0038] Combination Figure 2As shown, among the multiple concentrically arranged annular guide plates 105, the opening angle of the guide plate notches 110 decreases from the inside to the outside. This is to ensure a uniform flow rate of cooling water in the liquid channel 104 inside the cover plate water cavity 101. Specifically, in this embodiment, three rings of annular guide plates 105 are provided. The opening angle of the guide plate notches 110 on the innermost annular guide plate 105 is 60 degrees, the opening angle of the guide plate notches 110 on the middle annular guide plate 105 is 30 degrees, and the opening angle of the guide plate notches 110 on the outermost annular guide plate 105 is 20 degrees. From the inside to the outside, the opening angle of each guide plate notch 110 gradually decreases, which can effectively balance the pressure inside the front cover plate assembly 100 and ensure a uniform flow rate of cooling water.

[0039] Combination Figure 1 , Figure 4 As shown, the disc assembly 200 has two disc inlets 203 and two disc outlets 204, which are arranged symmetrically in pairs; the two disc outlets 204 converge at the tee connector 304 and then connect to the return water main pipe 300.

[0040] Combination Figure 3 As shown, the front cover assembly 100 includes a first cover 106 and a second cover 107; a cavity is provided on one side of the first cover 106, and the second cover 107 is welded to and seals the opening of the cavity to form the cover water cavity 101; a DN20 quick connector is welded to the second cover 107 to form the cover return water inlet 103; a reducer 108 is welded to the second cover 107, and a DN25 quick connector 109 is welded to the inlet end of the reducer 108. The reducer 108 and the DN25 quick connector 109 form the cover water inlet 102. Through the streamlined structure of the reducer 108, the flow resistance is minimized when the total water enters the cover water cavity 101 of the front cover assembly 100, and the DN25 quick connector 109 is used to achieve quick assembly and disassembly with the main water inlet pipe 300. The inlet 203 of the disc and the outlet 103 of the cover plate both use quick connectors of the same model as the outlet 103 of the cover plate, so as to facilitate the connection and disassembly of the pipe 302 and achieve quick assembly and disassembly.

[0041] Combination Figure 4 , Figure 5 As shown, during use, the water inlet 203 of the disc assembly 200 is connected to the cover return water inlet 103 of the front cover assembly 100 through the pipe 302. Slots are cut at the front and rear ends of the four sensor mounting seats of the disc, which are connected to the water cavity 201 of the disc. The water cavity 201 of the disc is equipped with a guide plate and a baffle to make the cooling water flow more reasonable and maximize the cooling effect on the sensor mounting seats.

[0042] Combination Figure 1As shown, a recessed platform is provided on the end face of the disk assembly 200. The front cover plate assembly 100 is snapped into the recessed platform and detachably connected to the disk assembly 200 by screws. A copper gasket 305 is provided between the front cover plate assembly 100 and the bottom wall of the recessed platform. The recessed platform is used to limit the position of the front cover plate assembly 100. The front cover plate assembly 100 and the disk assembly 200 are connected as a whole by bolts, which is simple and compact, reducing the space occupied by the device. At the same time, the copper gasket 305 can fill the gap between the two, ensuring the sealing performance; and the copper gasket 305 has excellent wear resistance and can be used for a long time without significant wear.

[0043] Combination Figure 1 As shown, a rear cover plate 205 is fixed to the end of the disk assembly 200, and bolt holes are evenly distributed in a ring on the rear cover plate 205. The entire cooling structure is connected to the rotating mechanism by bolts.

[0044] In this embodiment, both the front cover assembly 100 and the disc assembly 200 are made of GH3044. Since the front cover assembly 100 and the disc assembly 200 will be in direct contact with the gas, GH3044 is used to improve the structure's high-temperature resistance and the equipment's safety margin.

[0045] The rotary disc cooling structure for a combustion chamber outlet temperature measuring device provided by this invention allows cooling water to enter the cover plate water cavity 101 of the front cover plate assembly 100 via the inlet manifold 300, then enter the disc body water cavity 201 of the disc body assembly 200 via the pipe 302, and finally enter the return water manifold 301 via the tee connector 304. This simplifies the inlet and outlet of cooling water, reducing the flow resistance increased by complex structures. Cooling water for the disc body assembly 200 flows into the return water end of the front cover plate assembly 100, reducing the number of inlet and outlet water pipes inside the disc body assembly 200 and simplifying the structure.

[0046] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A rotating disk cooling structure for a combustion chamber outlet temperature measuring device, characterized in that: It includes a disk assembly (200) and a front cover assembly (100) disposed at the end of the disk assembly (200). The front cover assembly (100) is configured with a hollow structure to form a cover water cavity (101). A cover water inlet (102) and multiple cover water return inlets (103) are provided on one side of the front cover assembly (100) and connected to the cover water cavity (101). The disc assembly (200) has an annular structure and a disc water cavity (201) is provided inside it. The inner wall of the disc assembly (200) is provided with a plurality of disc water inlets (203) and a plurality of disc water outlets (204) that are connected to the disc water cavity (201). The number of disc water inlets (203) is the same as the number of cover plate water outlets (103). The cover plate inlet (102) is connected to the main inlet pipe (300); multiple cover plate return inlets (103) are connected to multiple disc inlets (203) through pipes (302); multiple disc return inlets (204) are collected and connected to the return pipe (300). The number of the cover plate return water inlets (103) is two; the cover plate inlet (102) is located at the center of one side of the front cover plate assembly (100), and the two cover plate return water inlets (103) are symmetrically arranged at 180° near the edge of the front cover plate assembly (100); Inside the cover water cavity (101) of the front cover assembly (100), a guide plate assembly is provided to divide the cover water cavity (101) into a meandering liquid channel (104). The disc assembly (200) has two disc inlets (203) and two disc outlets (204), which are arranged symmetrically in pairs. The two disc outlets (204) converge at the tee connector (304) and then connect to the return water main pipe (300). A recessed platform is provided on the end face of the disc assembly (200). The front cover plate assembly (100) is snapped into the recessed platform and is detachably connected to the disc assembly (200) by screws. A copper gasket (305) is provided between the front cover plate assembly (100) and the bottom wall of the recessed platform.

2. The rotary disk cooling structure for a combustion chamber outlet temperature measuring device as described in claim 1, characterized in that: The guide plate assembly consists of multiple concentric annular guide plates (105), each annular guide plate (105) having two guide plate notches (110) arranged symmetrically at 180°. The lines connecting the guide plate notches (110) on two adjacent annular guide plates (105) are perpendicular to each other; The line connecting the two guide plate notches (110) on the outermost annular guide plate (105) is perpendicular to the line connecting the two cover plate return ports (103).

3. The rotary disk cooling structure for a combustion chamber outlet temperature measuring device as described in claim 2, characterized in that: Among the multiple concentrically arranged annular guide plates (105), the included angle of the opening of the guide plate notch (110) gradually decreases from the inside to the outside.

4. The rotary disk cooling structure for a combustion chamber outlet temperature measuring device as described in claim 1, characterized in that: The front cover assembly (100) includes a first cover (106) and a second cover (107); a cavity is provided on one side of the first cover (106), and the second cover (107) is welded to and seals the opening of the cavity to form the cover water cavity (101). A DN20 quick connector is welded onto the second cover plate (107) to form the cover plate return port (103). A reducer (108) is welded onto the second cover plate (107), and a DN25 quick connector (109) is welded onto the inlet end of the reducer (108). The reducer (108) and the DN25 quick connector (109) form the cover plate inlet (102). The inlet (203) of the disc and the outlet (103) of the cover plate both use the same type of quick connector as the outlet (103) of the cover plate.

5. The rotary disk cooling structure for a combustion chamber outlet temperature measuring device as described in claim 1, characterized in that: A rear cover plate (205) is fixed to the end of the disk assembly (200), and bolt holes are evenly distributed in a ring on the rear cover plate (205).

6. The rotary disk cooling structure for a combustion chamber outlet temperature measuring device as described in claim 1, characterized in that: The front cover assembly (100) and the disc assembly (200) are both made of GH3044.

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