A jet pre-cooling installation structure and an assembly method thereof

Abstract

The application provides a kind of jet precooling installation structure, comprising: adapter section;Spray rod, which goes into adapter section, the middle of spray rod has medium channel and is provided with a plurality of spray holes communicating with medium channel on wall surface;Spray rod mounting seat, which comprises bottom surface and lug extending radially outward from the side edge of bottom surface, the bottom surface of spray rod mounting seat is adapted to the upper end surface of spray rod and is connected, the spray rod mounting seat can be connected and fixed with two bosses on adapter section by screw through lug, wherein, the bottom surface of spray rod mounting seat has mouth hole;Mouthpiece, which is installed at the mouth hole of spray rod mounting seat, and the spray medium flows into spray rod through the mouthpiece;Lap joint section, which is installed below the flow channel of adapter section and is fixedly connected with adapter section;Wherein, the lower part of flow channel of adapter section and the upper part of lap joint section are respectively provided with front half-type groove and rear half-type groove adapted to the shape of spray tube, and spray tube passes through adapter section to form overall recess with front half-type groove and rear half-type groove.

Description

Technical Field

[0001] This application belongs to the field of aero-engine technology, and specifically relates to a jet pre-cooling installation structure and its assembly method. Background Technology

[0002] Under high-altitude and high-speed conditions, the temperature of the incoming airflow is high, exceeding the operating range that a turbine engine can withstand. The basic working principle of jet precooling technology is as follows: a device for injecting cooling medium is installed in front of the fan or compressor of a conventional turbine engine. Through the injection, atomization, and evaporation effects of the cooling medium, the high-temperature airflow in the intake duct is cooled, thereby reducing or maintaining the total temperature of the airflow entering the fan or compressor at a certain temperature. This allows the engine to operate at a tolerable inlet airflow temperature, thus expanding the engine's operating range.

[0003] Currently, the nozzle of the jet precooling device can be disassembled and installed from the intake transition section on the test bench or assembly site, with sufficient operating space. Disassembly and installation can be completed by directly inserting and pulling the nozzle along its direction. However, when the entire jet device is installed on the aircraft along with the engine, the nozzle is too long and the vertical movement space is limited, making it impossible to disassemble and install the nozzle, thus failing to meet the actual engine usage requirements. Summary of the Invention

[0004] The purpose of this application is to provide a jet precooling installation structure and its assembly method to solve or mitigate at least one of the problems in the prior art.

[0005] The technical solution of this application is: a jet pre-cooling installation structure, comprising:

[0006] Adapter section;

[0007] The spray bar extends into the transition section. The spray bar has a medium channel in the middle and several spray holes connected to the medium channel are opened on the wall surface for the flow and spraying of the cooling medium.

[0008] A spray bar mounting base includes a bottom surface and a lug extending radially outward from the side of the bottom surface. The bottom surface of the spray bar mounting base is adapted to the upper end face of the spray bar and is connected by screws. The spray bar mounting base can be connected and fixed to two bosses on the adapter section by passing screws through the lugs. The bottom surface of the spray bar mounting base has a nozzle hole whose position and size are adapted to the medium channel of the spray bar.

[0009] A nozzle, installed at the nozzle hole of the spray bar mounting base, through which the spray medium flows into the spray bar; and

[0010] An overlapping section is installed below the flow channel of the transition section and is fixedly connected to the transition section;

[0011] The transition section has a front half-shaped groove and a rear half-shaped groove adapted to the shape of the nozzle, respectively, below the flow channel and on the overlapping section. The nozzle passes through the transition section and is placed in the integral groove formed by the front half-shaped groove and the rear half-shaped groove.

[0012] Furthermore, the front and rear ends of the transition section have front mounting edges and rear mounting edges, respectively, for connecting with other components to achieve the change from square to round flow channel.

[0013] Furthermore, the injection hole is located on the non-flow-facing side of the spray bar.

[0014] Furthermore, the nozzle and the spray bar mounting base are connected by welding.

[0015] Furthermore, a sealing gasket is provided between the bottom surface of the spray bar mounting base and the upper end surface of the spray bar.

[0016] Furthermore, the spray bar is bullet-shaped, and the integral groove formed by the front half-groove and the rear half-groove is adapted to the bullet-shaped shape of the spray bar.

[0017] Furthermore, the front half-groove and the rear half-groove are the same length.

[0018] In addition, this application also provides an assembly method for the jet precooling installation structure as described above, the assembly method comprising:

[0019] During installation, first connect the nozzle mounting base to the boss of the transition section with screws, then move the spray bar to the predetermined position in the flow channel, connect the upper end face of the spray bar to the bottom surface of the spray bar mounting base with screws, push the overlapping section into the corresponding position in the transition section, and tighten with countersunk screws.

[0020] During disassembly, first unscrew the countersunk screws, then pull out the overlapping section, unscrew the screws connecting the upper end face of the spray bar to the bottom face of the spray bar mounting base, separate the spray bar from the spray bar mounting base, take it out of the flow channel, and finally unscrew the screws to remove the spray bar mounting base.

[0021] The jet precooling installation structure provided in this application can save a lot of assembly space, allowing the long spray bar to be disassembled and assembled inside the flow channel without occupying much space outside the flow channel. This avoids the jet precooling structure being unable to be disassembled and maintained during installation due to space limitations, and greatly reduces maintenance costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions provided in this application, the accompanying drawings will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application.

[0023] Figure 1 This is a schematic diagram of the jet cooling structure of this application.

[0024] Figure 2 This is a top view of the spray bar mounting bracket of this application.

[0025] Figure 3 This is a front view of the transition section and overlapping section of this application.

[0026] Figure 4 This is a top view of the transition section and overlapping section of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0028] To address the issue of the inability to disassemble and reassemble the spray bar of a jet cooling device due to space constraints during installation, this application proposes a jet pre-cooling installation structure.

[0029] like Figures 1 to 4 As shown, the jet precooling installation structure 10 provided in this application is installed in the aircraft air intake duct, located in front of the engine air intake casing. The jet precooling installation structure mainly includes: a transition section 1, a spray bar 2, a spray bar mounting seat 3, a nozzle 4, a sealing gasket 5, and an overlapping section 6.

[0030] The transition section 1 is rectangular in shape, with a front mounting edge 11 and a rear mounting edge (the rear mounting edge is not shown) at its front and rear ends, respectively, for connecting with other components to realize the change from square to round flow channel. The main components of the jet device are all installed on the transition section 1.

[0031] The spray bar 2 extends into the transition section 1, where a medium channel 21 is located and several spray holes 22 are formed on the wall surface for the flow and spraying of the cooling medium. In a preferred embodiment of this application, the spray holes 22 are located on the rear side of the spray bar 2 (i.e., the side not facing the airflow).

[0032] The bottom surface of the spray bar mounting base 3 is adapted to the upper side surface of the spray bar 2. The bottom surface of the spray bar mounting base 3 and the upper side surface of the spray bar 2 are connected by two screws 31 arranged along the flow direction. The side of the spray bar mounting base 3 has two radially extending lugs 33. The spray bar mounting base 3 can be connected and fixed to two bosses on the adapter section 1 by screws 32 passing through the lugs 33. The bottom surface of the spray bar mounting base 3 has a nozzle hole whose position and size are adapted to the medium channel 21 in the spray bar 2. The nozzle 4 is installed at the nozzle hole of the spray bar mounting base 3, and the two are connected by welding. The sprayed medium flows into the spray bar 2 through the nozzle 4.

[0033] In a preferred embodiment of this application, a sealing gasket 5 is provided between the bottom surface of the spray bar mounting base 3 and the upper side surface of the spray bar 2.

[0034] like Figure 4 As shown, a front half-shaped groove 12 and a rear half-shaped groove 62 adapted to the shape of the nozzle 2 are respectively provided below the flow channel of the transition section 1 and on the overlapping section 6. The nozzle 2 passes through the transition section 1 and extends into the front half-shaped groove 12 and the rear half-shaped groove 62.

[0035] In a preferred embodiment of this application, the nozzle 2 is bullet-shaped, with one side of its tip facing the transition section 1. Correspondingly, the overall groove formed by the front half-groove 12 and the rear half-groove 62 is also bullet-shaped, and the two are evenly divided in length.

[0036] Furthermore, both the front half-groove 12 and the rear half-groove 62 are non-penetrating grooves, meaning that the depth of the front half-groove 12 and the rear half-groove 62 is less than the wall thickness below the flow channel of the overlapping section 6 and / or the transition section 1.

[0037] The overlapping section 6 and the rear end of the transition section 1 are connected by a stop. The front end of the overlapping section 6 is connected to the front mounting edge 11 of the transition section 1 by a countersunk screw 61. After installation, the overlapping section 6 and the transition section 1 together form the lower flow channel.

[0038] During installation, first connect the nozzle mounting base 3 to the boss of the adapter section 1 with screws 32. Then move the spray bar 2 to the appropriate position in the flow channel and connect the upper end face of the spray bar 2 to the bottom face of the spray bar mounting base 3 with screws 31. A sealing gasket 5 is installed in the middle. Finally, push the overlapping section 6 into the corresponding position in the adapter section 1 and tighten it with countersunk screws 61.

[0039] During disassembly, first unscrew the countersunk screw 61, then pull out the overlapping section 6, unscrew the screw 31 connecting the upper end face of the spray bar 2 to the bottom face of the spray bar mounting base 3, separate the spray bar 2 from the spray bar mounting base 3, take it out of the flow channel, and finally unscrew the screw 32 to remove the spray bar mounting base 3.

[0040] The jet precooling installation structure provided in this application can save a lot of assembly space, allowing the long spray bar to be disassembled and assembled inside the flow channel without occupying much space outside the flow channel. This avoids the jet precooling structure being unable to be disassembled and maintained during installation due to space limitations, and greatly reduces maintenance costs.

[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A jet precooling installation structure, characterized in that, include: Adapter section; The spray bar extends into the transition section. The spray bar has a medium channel in the middle and several spray holes connected to the medium channel are opened on the wall surface for the flow and spraying of the cooling medium. A spray bar mounting base includes a bottom surface and a lug extending radially outward from the side of the bottom surface. The bottom surface of the spray bar mounting base is adapted to the upper end face of the spray bar and is connected by screws. The spray bar mounting base can be connected and fixed to two bosses on the adapter section by passing screws through the lugs. The bottom surface of the spray bar mounting base has a nozzle hole whose position and size are adapted to the medium channel of the spray bar. A nozzle, installed at the nozzle hole of the spray bar mounting base, through which the spray medium flows into the spray bar; and An overlapping section is installed below the flow channel of the transition section and is fixedly connected to the transition section; The transition section has a front half-shaped groove and a rear half-shaped groove adapted to the shape of the nozzle, respectively, below the flow channel and on the overlapping section. The nozzle passes through the transition section and is placed in the integral groove formed by the front half-shaped groove and the rear half-shaped groove.

2. The jet precooling installation structure as described in claim 1, characterized in that, The front and rear ends of the transition section have front mounting edges and rear mounting edges, respectively, for connecting with other components to achieve the change from square to round flow channel.

3. The jet precooling installation structure as described in claim 1, characterized in that, The injection hole is located on the non-flow-facing side of the spray bar.

4. The jet precooling installation structure as described in claim 1, characterized in that, The nozzle and the spray bar mounting base are connected by welding.

5. The jet precooling installation structure as described in claim 1, characterized in that, A sealing gasket is provided between the bottom surface of the spray bar mounting base and the upper end surface of the spray bar.

6. The jet precooling installation structure as described in claim 1, characterized in that, The spray bar is bullet-shaped, and the integral groove formed by the front half-groove and the rear half-groove is adapted to the bullet-shaped shape of the spray bar.

7. The jet precooling installation structure as described in claim 6, characterized in that, The front and rear half-grooves are the same length.

8. An assembly method for a jet precooling installation structure as described in any one of claims 1 to 7, characterized in that, The assembly method includes: During installation, first connect the nozzle mounting base to the boss of the transition section with screws, then move the spray bar to the predetermined position in the flow channel, connect the upper end face of the spray bar to the bottom surface of the spray bar mounting base with screws, push the overlapping section into the corresponding position in the transition section, and tighten with countersunk screws. During disassembly, first unscrew the countersunk screws, then pull out the overlapping section, unscrew the screws connecting the upper end face of the spray bar to the bottom face of the spray bar mounting base, separate the spray bar from the spray bar mounting base, take it out of the flow channel, and finally unscrew the screws to remove the spray bar mounting base.

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