An aero-engine fuel nozzle sealability detection device

Abstract

This invention relates to the field of testing equipment technology, and specifically discloses a fuel nozzle sealing performance testing device for aero-engines. This device achieves the purpose of long-term pressurization testing and simultaneous testing. The equipment base and bracket provide overall support for the device. The pressurization device pushes the kerosene and maintains it in a compressed state after pressurization through unidirectional transmission, which is conducive to long-term sealing performance testing. The testing device fixes the nozzle and performs a permeability test using ring-shaped test paper, thereby allowing for direct observation of the nozzle's sealing performance after pressurization. The kerosene is recovered through a reflux device for easy recycling. The device can also perform simultaneous testing on multiple sets of nozzles, thereby improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a device for testing the sealing performance of fuel nozzles for aircraft engines. Background Technology

[0002] The aircraft engine is a core component of an aircraft, and the fuel nozzle, as the core of the engine's fuel system, directly affects the engine's combustion efficiency, emission levels, and service life, thus impacting flight safety and operational efficiency. A sealing problem in the nozzle can lead to decreased engine performance and even safety accidents. To ensure the reliability of the fuel nozzle, comprehensive testing of its various performance indicators is necessary to provide accurate data support for maintenance and research and development. Simultaneously, relevant educational institutions require specialized testing equipment for teaching purposes, aiming to make practical training for students majoring in electromechanical maintenance more closely resemble actual work requirements. The development of multiple technological fields, including mechanics, hydraulics, electrical engineering, optics, and computer control, has made it possible to design complex and precise testing equipment. For example, PLCs and industrial computers can achieve automated control of testing equipment, including functions such as pressure regulation, flow control, temperature management, and safety monitoring. Various fuel injector testing methods have emerged, such as the "gas testing method," which, compared to the "oil testing method," offers advantages such as simple operation, high detection sensitivity, high efficiency, no environmental pollution, no need for post-test processing, and low testing costs.

[0003] Current detection methods are limited and inefficient, unable to test multiple nozzles simultaneously. Furthermore, the test results are not intuitive, and the leakage of fuel injectors is often extremely small, making it difficult to detect using traditional methods or resulting in relatively high detection costs. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: an aircraft engine fuel nozzle sealing performance testing device, comprising a device base, a device bracket fixedly connected to the bottom of the device base, a pressurizing device fixedly connected to the top of the device base, a testing device fixedly connected to the top of the pressurizing device, a return flow device fixedly connected to the top of the testing device, and the bottom of the return flow device penetrating the interior of the testing device and communicating with the top of the pressurizing device.

[0005] The pressurization device includes a first worm gear, with a first screw threadedly connected to the top of the first worm gear. A hydraulic push plate is rotatably connected to the top of the first screw. An oil storage tank is sleeved and slidably connected to the side of the hydraulic push plate. A flow port is opened at the top of the inner wall of the oil storage tank. A flow guide pipe is connected to the top of the oil storage tank. The bottom of the flow guide pipe is connected to the top of the flow port. A first worm is meshed with the side of the first worm gear. A drive shaft of a first motor is fixedly connected to the side of the first worm. The first motor is fixedly connected to the top of the equipment base via a bracket. The bottom of the first worm gear is rotatably connected to the top of the equipment base. The first motor is started, and its drive shaft drives the first worm gear to rotate. The rotation of the first worm gear drives the first worm wheel to rotate, which in turn drives the first screw to rise or fall. The rising of the first screw drives the hydraulic push plate to move, which in turn squeezes the kerosene, causing it to flow along the guide port and then be discharged along the guide pipe. This pressurizes the nozzle, allowing for testing of the nozzle's sealing performance. The unidirectional transmission between the first screw, the first worm wheel, and the first worm gear ensures that the nozzle remains in a fixed position after pressurization, thus providing continuous pressurization and facilitating long-term sealing performance testing.

[0006] Preferably, the testing device includes a fixed base plate, a first hollow worm gear rotatably connected to the top of the fixed base plate, a second hollow worm gear fixedly connected to the bottom of the first hollow worm gear, a drive end of an electric worm gear meshing with the side of the second hollow worm gear, a positioning component meshing with the side of the first hollow worm gear, a limit device sleeved and slidably connected to the side of the positioning component, an elastic component slidably connected to the top of the limit device, a top of the elastic component fixedly connected to the bottom of the reflux device, a bottom of the electric worm gear fixedly connected to the top of the oil storage tank, and a bottom of the second hollow worm gear rotatably connected to the top of the oil storage tank.

[0007] Preferably, the positioning assembly includes an oil delivery pipe with a positioning groove at its top. A first sliding strip is fixedly connected to the side of the oil delivery pipe, and a hollow screw is rotatably connected to the bottom of the oil delivery pipe. A second worm gear is threadedly connected to the side of the hollow screw, and a fixed sliding tube is rotatably connected to the bottom of the second worm gear. The fixed sliding tube is sleeved on the side of the guide pipe and slidably connected to the guide pipe. The side of the second worm gear meshes with the side of the first hollow worm gear. When the electric worm gear is activated, it drives the second hollow worm gear to rotate, which in turn drives the hollow screw to rise. The hollow screw rises, causing the oil delivery pipe to rise. The rising oil delivery pipe causes the nozzle to be fixed inside the limiting device, and the oil inlet of the nozzle contacts the top of the oil delivery pipe. Under the guidance of the positioning groove, it maintains a sealed contact with the nozzle. The position of the oil delivery pipe is fixed by the first slide bar to prevent rotation and accidental leakage. At the same time, kerosene enters the hollow screw through the fixed slide bar and enters the nozzle along the inside of the oil delivery pipe, thereby conducting a sealing test. The second worm gear is threadedly connected to the hollow screw, thus maintaining a tight contact with the bottom of the nozzle during the sealing test, which facilitates long-term sealing tests.

[0008] Preferably, the limiting device includes a fixed cylinder, a limiting groove is formed at the top of the fixed cylinder, a protective cylinder is fixedly connected to the portion of the top of the fixed cylinder located on one side of the limiting groove, a first sliding groove adapted to the first sliding strip is formed on the inner wall of the fixed cylinder, a fixed bracket is fixedly connected to the side of the fixed cylinder, a limiting ring is fixedly connected to the top of the fixed bracket, a second sliding groove is formed at the top of the limiting ring, the bottom of the fixed bracket is fixedly connected to the top of the oil storage tank, and the oil delivery pipe is slidably connected to the inner wall of the fixed cylinder through the first sliding strip.

[0009] Preferably, the elastic component includes a spring rod, the movable end of which is fixedly connected to a fixed seat, the bottom of which is fixedly connected to a second slide bar, the side of which is fixedly connected to a limit component, the top of which is connected to a return oil pipe, the fixed seat being slidably connected to a limit ring via the second slide bar, the top of which is fixedly connected to the bottom of the return device, and the side of which is connected to the side of the return oil pipe.

[0010] Preferably, the limiting component includes a limiting seat, the bottom of which has a lower guide groove, the top of the inner wall of which has an oil outlet hole, the top of the inner wall of which has an oil delivery hole, the top of which communicates with the bottom of the return oil pipe, the side of which is slidably connected to the inner wall of the limiting ring, the nozzle slides along the side of the fixed bracket and is placed on top of the protective cylinder, the bottom of which contacts the top of the protective cylinder, the top of the oil delivery pipe contacts the bottom of the nozzle along the protective cylinder, and the test paper is placed around the protective cylinder by the combined action of the limiting groove and the protective cylinder, thereby facilitating the observation of the permeability during the sealing test. The bottom of the limiting seat... The nozzle contacts the top of the spray nozzle. Guided by the lower guide groove, the top of the nozzle keeps the nozzle orifice aligned with the center of the oil delivery hole. The nozzle collects the arc-shaped spray through the oil outlet, allowing the kerosene to flow along the inner wall of the oil delivery hole into the return pipe and then into the return device for recycling. When the nozzle is placed on top of the protective cylinder, it is pre-pressed onto the top of the oil delivery pipe by the limit seat under the elastic force provided by the spring rod, thus positioning it in advance. The spring rod also provides elastic fixation for the nozzle, facilitating placement. Furthermore, the protective cylinder prevents the oil delivery pipe from accidentally contaminating the test paper after descending into the protective cylinder, thus affecting the test results.

[0011] Preferably, the reflux device includes a reflux top plate, a connecting bracket fixedly connected to the bottom of the reflux top plate, a tapered tube fixedly connected to the bottom of the connecting bracket, a one-way valve connected to the bottom of the tapered tube, a reflux pipe connected to the bottom of the one-way valve, a fixing frame fixedly connected to the bottom of the reflux top plate on one side of the connecting bracket, the bottom of the reflux pipe connected to the top of the oil storage tank, the bottom of the fixing frame fixedly connected to the top of the fixed base plate, and the side of the tapered tube connected to the side of the return oil pipe. Kerosene flows along the return oil pipe and enters the interior of the tapered tube, and accumulates under the guidance of the tapered tube, accumulating at the top of the one-way valve and flowing back into the interior of the reflux pipe along the one-way valve, thus refluxing the kerosene. When the hydraulic push plate descends, the one-way valve automatically opens, allowing the kerosene to reflux unidirectionally into the interior of the oil storage tank. During pressurization, the one-way valve prevents the kerosene from flowing, thus facilitating the kerosene reflux. The unidirectional flow also facilitates sealing tests.

[0012] This invention provides a device for testing the sealing performance of fuel nozzles in aircraft engines. It offers the following advantages:

[0013] 1. This aircraft engine fuel nozzle sealing performance testing equipment is equipped with a first motor. The drive shaft of the first motor drives a first worm gear to rotate, which in turn drives a first worm wheel to rotate. The rotation of the first worm wheel drives a first screw to rise or fall. The rising of the first screw drives a hydraulic push plate to move, which in turn compresses kerosene, causing the kerosene to flow along the guide port and then be discharged along the guide pipe. This pressurizes the nozzle, thereby testing its sealing performance. The unidirectional transmission between the first screw and the first worm wheel, as well as between the first worm wheel and the first worm gear, ensures that the pressurized nozzle remains in a fixed position, thus continuously pressurizing the nozzle and facilitating long-term sealing performance testing.

[0014] 2. This aircraft engine fuel nozzle sealing test equipment is equipped with an electric worm gear. The electric worm gear drives the second hollow worm wheel to rotate, which in turn drives the second worm wheel to rotate, which in turn drives the hollow screw to rise. The rising of the hollow screw drives the fuel delivery pipe to rise, and the rising of the fuel delivery pipe causes the nozzle to be fixed inside the limiting device. The fuel inlet of the nozzle contacts the top of the fuel delivery pipe, and under the guidance of the positioning groove, it maintains a sealed contact with the nozzle. The position of the fuel delivery pipe is fixed by a first sliding strip to prevent accidental leakage due to rotation. At the same time, kerosene enters the hollow screw through the fixed sliding tube and enters the nozzle along the inside of the fuel delivery pipe, thereby performing a sealing test. The second worm wheel is threadedly connected to the hollow screw, thus maintaining a tight contact with the bottom of the nozzle during the sealing test, which facilitates long-term sealing tests.

[0015] 3. This aircraft engine fuel nozzle sealing test equipment is equipped with a fixed bracket. The nozzle slides along the side of the fixed bracket and is placed on top of the protective cylinder, with the bottom of the nozzle in contact with the top of the protective cylinder. The top of the fuel delivery pipe contacts the bottom of the nozzle along the protective cylinder. Test paper is placed around the protective cylinder by the combined action of the limiting groove and the protective cylinder, thus facilitating the observation of permeability during sealing tests. The bottom of the limiting seat contacts the top of the nozzle, and the top of the nozzle is kept centered between the nozzle orifice and the fuel delivery hole under the guidance of the lower guide groove. The nozzle is aligned and collected through the oil outlet in an arc shape, allowing kerosene to flow along the inner wall of the oil supply hole into the return pipe and then into the reflux device for recycling. When the nozzle is placed on top of the protective cylinder, it is pre-pressed onto the top of the oil supply pipe by the limit seat under the elastic force provided by the spring rod, thus positioning it in advance. The spring rod also provides elastic fixation for the nozzle, facilitating placement. Furthermore, the protective cylinder prevents the oil supply pipe from accidentally contaminating the test paper after descending into the protective cylinder, which could affect the test results.

[0016] 4. This aircraft engine fuel nozzle sealing test equipment is equipped with a return oil pipe. Kerosene flows along the return oil pipe and enters the interior of a tapered tube. Under the guidance of the tapered tube, kerosene accumulates at the top of a one-way valve and flows back into the oil storage tank through the return pipe, thus kerosene recirculation. When the hydraulic push plate descends, the one-way valve automatically opens, allowing kerosene to flow back into the oil storage tank in one direction. During pressurization, the one-way valve prevents kerosene flow, facilitating kerosene recirculation. The one-way transmission also facilitates sealing tests. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the aircraft engine fuel nozzle sealing test device of the present invention;

[0018] Figure 2 This is a schematic diagram of the pressurization device of the present invention;

[0019] Figure 3 This is a schematic diagram of the test device structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the positioning component structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the limiting device structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the elastic component structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the limiting component structure of the present invention;

[0024] Figure 8 This is a schematic diagram of the reflux device of the present invention.

[0025] In the diagram: 1. Equipment base; 2. Equipment support; 3. Pressurization device; 4. Testing device; 5. Recirculation device; 301. First worm gear; 302. First screw; 303. Hydraulic push plate; 304. Oil storage tank; 305. Flow guide port; 306. Flow guide pipe; 307. First worm gear; 308. First motor; 401. Fixed base plate; 402. First hollow worm gear; 403. Second hollow worm gear; 404. Electric worm gear; 405. Positioning component; 406. Limiting device; 407. Elastic component; 4051. Oil delivery pipe; 4052. Positioning groove; 4053. First slide bar; 4054. Hollow screw; 4055. Two worm gears; 4056, fixed slide tube; 4061, fixed cylinder; 4062, limiting groove; 4063, protective cylinder; 4064, first slide groove; 4065, fixed bracket; 4066, limiting ring; 4067, second slide groove; 4071, spring rod; 4072, fixed seat; 4073, second slide bar; 4074, limiting assembly; 4075, oil return pipe; 40741, limiting seat; 40742, lower guide groove; 40743, oil outlet; 40744, oil delivery hole; 501, return top plate; 502, connecting bracket; 503, tapered tube; 504, one-way valve; 505, return pipe; 506, fixed frame. Detailed Implementation

[0026] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-2 The present invention provides a technical solution: an aircraft engine fuel nozzle sealing test device, including a device base 1, a device bracket 2 fixedly connected to the bottom of the device base 1, a pressurizing device 3 fixedly connected to the top of the device base 1, a test device 4 fixedly connected to the top of the pressurizing device 3, a return device 5 fixedly connected to the top of the test device 4, and the bottom of the return device 5 penetrating the interior of the test device 4 and communicating with the top of the pressurizing device 3.

[0028] The equipment base 1 and equipment bracket 2 provide overall support for the equipment. The pressurizing device 3 pushes the kerosene and pressurizes it through unidirectional transmission, keeping it in a compressed state. This facilitates long-term sealing tests. The testing device 4 fixes the nozzle and performs a permeability test using ring-shaped test paper. This allows for direct observation of the nozzle's sealing performance after pressurization. The kerosene is recovered through the reflux device 5 for easy recycling. The testing device 4 also performs simultaneous tests on multiple sets of nozzles, thereby improving testing efficiency.

[0029] The booster device 3 includes a first worm gear 301, a first screw 302 threadedly connected to the top of the first worm gear 301, a hydraulic push plate 303 rotatably connected to the top of the first screw 302, an oil storage tank 304 sleeved and slidably connected to the side of the hydraulic push plate 303, a guide port 305 opened on the top of the inner wall of the oil storage tank 304, a guide pipe 306 connected to the top of the oil storage tank 304, the bottom of the guide pipe 306 connected to the top of the guide port 305, a first worm 307 meshing with the side of the first worm gear 301, a drive shaft of a first motor 308 fixedly connected to the side of the first worm 307, the first motor 308 fixedly connected to the top of the equipment base 1 through a bracket, and the bottom of the first worm gear 301 rotatably connected to the top of the equipment base 1.

[0030] The first motor 308 is started, and the drive shaft of the first motor 308 drives the first worm gear 307 to rotate. The rotation of the first worm gear 307 drives the first worm wheel 301 to rotate. The rotation of the first worm wheel 301 drives the first screw 302 to rise or fall. The rise of the first screw 302 drives the hydraulic push plate 303 to move. The movement of the hydraulic push plate 303 squeezes the kerosene, so that the kerosene flows along the guide port 305 and is discharged along the guide pipe 306, thereby pressurizing the nozzle and testing the nozzle's sealing performance. The unidirectional transmission between the first screw 302 and the first worm wheel 301, as well as between the first worm wheel 301 and the first worm gear 307, ensures that the nozzle remains in a fixed position after pressurization, thereby continuously pressurizing the nozzle and facilitating long-term sealing performance testing.

[0031] Please see Figures 1-4 The present invention provides a technical solution: the testing device 4 includes a fixed base plate 401, a first hollow worm gear 402 is rotatably connected to the top of the fixed base plate 401, a second hollow worm gear 403 is fixedly connected to the bottom of the first hollow worm gear 402, the driving end of an electric worm gear 404 is meshed on the side of the second hollow worm gear 403, a positioning component 405 is meshed on the side of the first hollow worm gear 402, a limiting device 406 is sleeved and slidably connected to the side of the positioning component 405, an elastic component 407 is slidably connected to the top of the limiting device 406, the top of the elastic component 407 is fixedly connected to the bottom of the return device 5, the bottom of the electric worm gear 404 is fixedly connected to the top of the oil storage tank 304, and the bottom of the second hollow worm gear 403 is rotatably connected to the top of the oil storage tank 304.

[0032] The positioning assembly 405 includes an oil delivery pipe 4051, with a positioning groove 4052 on the top of the oil delivery pipe 4051. A first slide bar 4053 is fixedly connected to the side of the oil delivery pipe 4051, and a hollow screw 4054 is rotatably connected to the bottom of the oil delivery pipe 4051. A second worm gear 4055 is threadedly connected to the side of the hollow screw 4054, and a fixed slide tube 4056 is rotatably connected to the bottom of the second worm gear 4055. The fixed slide tube 4056 is sleeved on the side of the guide pipe 306 and slidably connected to the guide pipe 306. The side of the second worm gear 4055 meshes with the side of the first hollow worm gear 402.

[0033] The electric worm gear 404 is activated, which drives the second hollow worm wheel 403 to rotate. The rotation of the second hollow worm wheel 403 drives the second worm wheel 4055 to rotate, which in turn drives the hollow screw 4054 to rise. The rise of the hollow screw 4054 drives the oil delivery pipe 4051 to rise, which in turn fixes the nozzle inside the limiting device 406. The oil inlet of the nozzle contacts the top of the oil delivery pipe 4051, and the nozzle is guided by the positioning groove 4052. The lower part maintains a sealed contact with the nozzle, and the position of the oil supply pipe 4051 is fixed by the first slide bar 4053 to prevent rotation and accidental leakage. At the same time, kerosene enters the hollow screw 4054 through the fixed slide pipe 4056 and enters the nozzle along the inside of the oil supply pipe 4051, thereby conducting a sealing test. The second worm gear 4055 is threadedly connected to the hollow screw 4054, thereby maintaining a tight contact with the bottom of the nozzle during the sealing test, which facilitates long-term sealing tests.

[0034] Please see Figures 1-7 The present invention provides a technical solution: the limiting device 406 includes a fixed cylinder 4061, a limiting groove 4062 is formed on the top of the fixed cylinder 4061, a protective cylinder 4063 is fixedly connected to the part of the top of the fixed cylinder 4061 located on one side of the limiting groove 4062, a first sliding groove 4064 adapted to the first sliding strip 4053 is formed on the inner wall of the fixed cylinder 4061, a fixed bracket 4065 is fixedly connected to the side of the fixed cylinder 4061, a limiting ring 4066 is fixedly connected to the top of the fixed bracket 4065, a second sliding groove 4067 is formed on the top of the limiting ring 4066, the bottom of the fixed bracket 4065 is fixedly connected to the top of the oil storage tank 304, and the oil delivery pipe 4051 is slidably connected to the inner wall of the fixed cylinder 4061 through the first sliding strip 4053.

[0035] The elastic component 407 includes a spring rod 4071, a fixed base 4072 fixedly connected to the movable end of the spring rod 4071, a second slide bar 4073 fixedly connected to the bottom of the fixed base 4072, a limit component 4074 fixedly connected to the side of the second slide bar 4073, and a return oil pipe 4075 connected to the top of the limit component 4074. The fixed base 4072 is slidably connected to the limit ring 4066 through the second slide bar 4073. The top of the spring rod 4071 is fixedly connected to the bottom of the return device 5, and the side of the return oil pipe 4075 is connected to the side of the return device 5.

[0036] The limiting assembly 4074 includes a limiting seat 40741. The bottom of the limiting seat 40741 is provided with a lower guide groove 40742. The top of the inner wall of the lower guide groove 40742 is provided with an oil outlet hole 40743. The top of the inner wall of the oil outlet hole 40743 is provided with an oil delivery hole 40744. The top of the oil delivery hole 40744 is connected to the bottom of the return oil pipe 4075. The side of the limiting seat 40741 is slidably connected to the inner wall of the limiting ring 4066.

[0037] The nozzle slides along the side of the fixed bracket 4065 and is placed on top of the protective cylinder 4063. The bottom of the nozzle contacts the top of the protective cylinder 4063. The top of the oil supply pipe 4051 contacts the bottom of the nozzle along the protective cylinder 4063. The test paper is placed around the protective cylinder 4063 by the combined action of the limiting groove 4062 and the protective cylinder 4063, which facilitates the observation of the permeability during the sealing test. The bottom of the limiting seat 40741 contacts the top of the nozzle. Under the guidance of the lower guide groove 40742, the top of the nozzle keeps the nozzle orifice aligned with the center of the oil supply hole 40744 and passes through the oil outlet hole 4074. The collection of the three arc-shaped sprays allows kerosene to enter the oil return pipe 4075 along the inner wall of the oil delivery hole 40744 and then into the reflux device 5 for recycling. When the nozzle is placed on top of the protective cylinder 4063, the nozzle is pre-pressed onto the top of the oil delivery pipe 4051 by the limiting seat 40741 under the elastic force provided by the spring rod 4071, thus positioning it in advance. The nozzle is elastically fixed by the spring rod 4071, making it easy to place. The protective cylinder 4063 also prevents the oil delivery pipe 4051 from accidentally contaminating the test paper after descending into the protective cylinder 4063, thus affecting the test results.

[0038] Please see Figures 1-8The present invention provides a technical solution: the reflux device 5 includes a reflux top plate 501, a connecting bracket 502 is fixedly connected to the bottom of the reflux top plate 501, a tapered tube 503 is fixedly connected to the bottom of the connecting bracket 502, a one-way valve 504 is connected to the bottom of the tapered tube 503, a reflux pipe 505 is connected to the bottom of the one-way valve 504, a fixing frame 506 is fixedly connected to the bottom of the reflux top plate 501 located on one side of the connecting bracket 502, the bottom of the reflux pipe 505 is connected to the top of the oil storage tank 304, the bottom of the fixing frame 506 is fixedly connected to the top of the fixing base plate 401, and the side of the tapered tube 503 is connected to the side of the return oil pipe 4075.

[0039] Kerosene flows along the return pipe 4075 and enters the interior of the tapered pipe 503. Under the guidance of the tapered pipe 503, it accumulates and gathers at the top of the one-way valve 504. It then flows along the one-way valve 504 into the return pipe 505 and back into the oil storage tank 304, thus kerosene recirculation. When the hydraulic push plate 303 descends, the one-way valve 504 automatically opens, allowing kerosene to flow back into the oil storage tank 304 in one direction. During pressurization, the one-way valve 504 prevents kerosene flow, facilitating kerosene recirculation. The one-way transmission also facilitates sealing tests.

[0040] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A device for testing the sealing performance of fuel nozzles for aircraft engines, characterized in that: The device includes a base (1), a support (2) is fixedly connected to the bottom of the base (1), a booster device (3) is fixedly connected to the top of the base (1), a test device (4) is fixedly connected to the top of the booster device (3), a reflux device (5) is fixedly connected to the top of the test device (4), and the bottom of the reflux device (5) penetrates the interior of the test device (4) and communicates with the top of the booster device (3). The booster device (3) includes a first worm gear (301), the top of the first worm gear (301) is threaded through and connected to a first screw (302), the top of the first screw (302) is rotatably connected to a hydraulic push plate (303), the side of the hydraulic push plate (303) is sleeved and slidably connected to an oil storage tank (304), the top of the inner wall of the oil storage tank (304) is provided with a guide port (305), the top of the oil storage tank (304) is connected to a guide pipe (306), the bottom of the guide pipe (306) is connected to the top of the guide port (305), the side of the first worm gear (301) is meshed with a first worm (307), the side of the first worm (307) is fixedly connected to the drive shaft of a first motor (308), the first motor (308) is fixedly connected to the top of the equipment base (1) through a bracket, and the bottom of the first worm gear (301) is rotatably connected to the top of the equipment base (1). The testing device (4) includes a fixed base plate (401), a first hollow worm gear (402) is rotatably connected to the top of the fixed base plate (401), a second hollow worm gear (403) is fixedly connected to the bottom of the first hollow worm gear (402), the driving end of an electric worm gear (404) is meshed on the side of the second hollow worm gear (403), a positioning component (405) is meshed on the side of the first hollow worm gear (402), a limiting device (406) is sleeved and slidably connected to the side of the positioning component (405), an elastic component (407) is slidably connected to the top of the limiting device (406), the top of the elastic component (407) is fixedly connected to the bottom of the return device (5), the bottom of the electric worm gear (404) is fixedly connected to the top of the oil storage tank (304), and the bottom of the second hollow worm gear (403) is rotatably connected to the top of the oil storage tank (304). The positioning component (405) includes an oil delivery pipe (4051), a positioning groove (4052) is provided on the top of the oil delivery pipe (4051), a first slide bar (4053) is fixedly connected to the side of the oil delivery pipe (4051), a hollow screw (4054) is rotatably connected to the bottom of the oil delivery pipe (4051), a second worm gear (4055) is threadedly connected to the side of the hollow screw (4054), a fixed slide tube (4056) is rotatably connected to the bottom of the second worm gear (4055), the fixed slide tube (4056) is sleeved on the side of the guide pipe (306) and slidably connected to the guide pipe (306), and the side of the second worm gear (4055) meshes with the side of the first hollow worm gear (402). The limiting device (406) includes a fixed cylinder (4061), a limiting groove (4062) is provided on the top of the fixed cylinder (4061), a protective cylinder (4063) is fixedly connected to the part of the top of the fixed cylinder (4061) located on one side of the limiting groove (4062), a first sliding groove (4064) adapted to the first sliding strip (4053) is provided on the inner wall of the fixed cylinder (4061), a fixed bracket (4065) is fixedly connected to the side of the fixed cylinder (4061), a limiting ring (4066) is fixedly connected to the top of the fixed bracket (4065), a second sliding groove (4067) is provided on the top of the limiting ring (4066), the bottom of the fixed bracket (4065) is fixedly connected to the top of the oil storage tank (304), and the oil delivery pipe (4051) is slidably connected to the inner wall of the fixed cylinder (4061) through the first sliding strip (4053).

2. The aircraft engine fuel nozzle sealing performance testing device according to claim 1, characterized in that: The elastic component (407) includes a spring rod (4071), the movable end of the spring rod (4071) is fixedly connected to a fixed seat (4072), the bottom of the fixed seat (4072) is fixedly connected to a second slide bar (4073), the side of the second slide bar (4073) is fixedly connected to a limit component (4074), the top of the limit component (4074) is connected to a return oil pipe (4075), the fixed seat (4072) is slidably connected to a limit ring (4066) through the second slide bar (4073), the top of the spring rod (4071) is fixedly connected to the bottom of the return device (5), and the side of the return oil pipe (4075) is connected to the side of the return device (5).

3. The aircraft engine fuel nozzle sealing performance testing device according to claim 2, characterized in that: The limiting component (4074) includes a limiting seat (40741), the bottom of the limiting seat (40741) is provided with a lower guide groove (40742), the top of the inner wall of the lower guide groove (40742) is provided with an oil outlet hole (40743), and the top of the inner wall of the oil outlet hole (40743) is provided with an oil delivery hole (40744).

4. The aircraft engine fuel nozzle sealing performance testing device according to claim 3, characterized in that: The top of the oil delivery hole (40744) is connected to the bottom of the return oil pipe (4075), and the side of the limiting seat (40741) is slidably connected to the inner wall of the limiting ring (4066).

5. The aircraft engine fuel nozzle sealing performance testing device according to claim 2, characterized in that: The reflux device (5) includes a reflux top plate (501), a connecting bracket (502) is fixedly connected to the bottom of the reflux top plate (501), a tapered tube (503) is fixedly connected to the bottom of the connecting bracket (502), a one-way valve (504) is connected to the bottom of the tapered tube (503), a reflux pipe (505) is connected to the bottom of the one-way valve (504), and a fixing frame (506) is fixedly connected to the bottom of the reflux top plate (501) located on one side of the connecting bracket (502).

6. The aircraft engine fuel nozzle sealing performance testing device according to claim 5, characterized in that: The bottom of the return pipe (505) is connected to the top of the oil storage tank (304), the bottom of the fixing bracket (506) is fixedly connected to the top of the fixing base plate (401), and the side of the tapered pipe (503) is connected to the side of the return oil pipe (4075).

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