Airtightness detection equipment for fuel nozzle of aero-engine

Abstract

The invention relates to the technical field of detection equipment, and particularly discloses aero-engine fuel nozzle sealing performance detection equipment, the aero-engine fuel nozzle sealing performance detection equipment achieves the purposes of long-time pressurization test and simultaneous test, an equipment base and an equipment support integrally support the equipment, and the equipment is convenient to use. The pressurization device pushes kerosene, the kerosene is pressurized through one-way transmission and then is kept in a pressed state, so that long-time sealing performance testing is facilitated, the testing device fixes the spraying pipe, permeability testing is conducted through annular test paper, and the sealing performance of the spraying pipe is visually observed after pressurization; kerosene is recycled through the backflow device, so that cyclic utilization is facilitated, and the multiple sets of spray pipes are synchronously tested through the testing device, so that the testing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, in particular to an aero-engine fuel nozzle sealing detection equipment. BACKGROUND

[0002] The aero-engine is the core component of the airplane, and the fuel nozzle is the core of the engine fuel system, and its sealing directly affects the combustion efficiency, emission level and service life of the engine, and is related to flight safety and operational efficiency. Once the nozzle has sealing problems, it may cause the performance of the engine to decline, and even cause safety accidents. In order to ensure the reliability of the fuel nozzle, it is necessary to comprehensively detect its various performance indicators to provide accurate data support for maintenance and research and development. At the same time, relevant colleges and universities also need professional detection equipment for teaching to make the students' practical training of mechanical and electrical maintenance major more close to the actual work requirements. With the development of multiple technical fields such as machinery, hydraulic pressure, electricity, optics and computer control, it is possible to design a complex and precise detection equipment. For example, through PLC and industrial computer, the automatic control of the detection equipment can be realized, including pressure regulation, flow control, temperature management and safety monitoring functions, and a variety of fuel nozzle detection methods have appeared, such as "gas test method" compared with "oil test method" has the advantages of simple operation, high detection sensitivity, high efficiency, no pollution to the environment, no need to handle the workpiece after detection, low detection cost and the like.

[0003] The current detection method is single, and the test efficiency is low, and multiple nozzles cannot be tested at the same time, and the test result is not intuitive. The leakage of the fuel injector is extremely small in many cases, and the traditional detection method is difficult to detect or the detection cost is relatively high. SUMMARY

[0004] In order to achieve the above purpose, the present application is realized through the following technical scheme: an aero-engine fuel nozzle sealing detection equipment, comprising a device base, the bottom of the device base is fixedly connected with a device support, the top of the device base is fixedly connected with a supercharging device, the top of the supercharging device is fixedly connected with a test device, the top of the test device is fixedly connected with a reflux device, the bottom of the reflux device penetrates the inside of the test device and communicates with the top of the supercharging device; The supercharging device comprises a first worm wheel, a first screw rod is screwed at the top of the first worm wheel, a hydraulic push plate is rotatably connected at the top of the first screw rod, an oil storage tank is sleeved and slidably connected at the side of the hydraulic push plate, a flow guide opening is formed at the top of the inner wall of the oil storage tank, a flow guide pipe is communicated with the top of the oil storage tank, the bottom of the flow guide pipe is communicated with the top of the flow guide opening, a first worm is engaged with the side of the first worm wheel, a driving shaft of a first motor is fixedly connected with the side of the first worm, the first motor is fixedly connected with the top of the equipment base through a support, the bottom of the first worm wheel is rotatably connected with the top of the equipment base, the first motor is started, the driving shaft of the first motor drives the first worm to rotate, the first worm drives the first worm wheel to rotate, the first worm wheel drives the first screw rod to rise or fall, the first screw rod drives the hydraulic push plate to move, the hydraulic push plate extrudes kerosene, so that the kerosene flows along the flow guide opening, so that the kerosene is discharged along the flow guide pipe, so that the nozzle is supercharged, so that the sealing performance of the nozzle is detected, and the one-way transmission between the first screw rod and the first worm wheel and the first worm wheel and the first worm is ensured, so that the nozzle is continuously supercharged and kept in a fixed position, so that the nozzle is continuously supercharged, so that the sealing performance is detected for a long time.

[0005] Preferably, the test device comprises a fixed base plate, a first hollow worm wheel is rotatably connected at the top of the fixed base plate, a second hollow worm wheel is fixedly connected at the bottom of the first hollow worm wheel, a driving end of an electric worm is engaged with the side of the second hollow worm wheel, a positioning assembly is engaged with the side of the first hollow worm wheel, a limiting device is sleeved and slidably connected at the side of the positioning assembly, an elastic assembly is slidably connected at the top of the limiting device, the bottom of the elastic assembly is fixedly connected with a backflow device, the bottom of the electric worm is fixedly connected with the top of the oil storage tank, and the bottom of the second hollow worm wheel is rotatably connected with the top of the oil storage tank.

[0006] Preferably, the positioning assembly comprises an oil feeding pipe, the top of the oil feeding pipe is provided with a positioning slot, the side of the oil feeding pipe is fixedly connected with a first sliding bar, the bottom of the oil feeding pipe is rotatably connected with a hollow screw rod, the side of the hollow screw rod is threadedly connected with a second worm wheel, the bottom of the second worm wheel is rotatably connected with a fixed sliding pipe, the fixed sliding pipe is sleeved on the side of the flow guide pipe and is slidably connected with the flow guide pipe, the side of the second worm wheel is engaged with the side of the first hollow worm wheel, the electric worm is started, the electric worm drives the second hollow worm wheel to rotate, the second hollow worm wheel drives the second worm wheel to rotate, the second worm wheel drives the hollow screw rod to ascend, the hollow screw rod drives the oil feeding pipe to ascend, the oil feeding pipe drives the spray pipe to be fixed in the limiting device, the oil inlet hole of the spray pipe is in contact with the top of the oil feeding pipe, and the oil feeding pipe is kept in sealed contact with the spray pipe under the guidance of the positioning slot and is fixed in position through the first sliding bar to avoid accidental penetration caused by rotation, while kerosene enters the hollow screw rod through the fixed sliding pipe and enters the spray pipe along the inside of the oil feeding pipe, so that the sealing test is performed, and the second worm wheel and the hollow screw rod are threadedly connected, so that the spray pipe bottom is kept in close contact during the sealing test, thereby facilitating long-term sealing test.

[0007] Preferably, the limiting device comprises a fixed cylinder, the top of the fixed cylinder is provided with a limiting slot, the top of the fixed cylinder is fixedly connected with a protection cylinder on one side of the limiting slot, the inner wall of the fixed cylinder is provided with a first sliding groove matched with the first sliding bar, the side of the fixed cylinder is fixedly connected with a fixed support, the top of the fixed support is fixedly connected with a limiting ring, the top of the limiting ring is provided with a second sliding groove, and the bottom of the fixed support is fixedly connected with the top of the oil storage tank. The oil feeding pipe is slidably connected with the inner wall of the fixed cylinder through the first sliding bar.

[0008] Preferably, the elastic assembly comprises a spring rod, the movable end of the spring rod is fixedly connected with a fixed seat, the bottom of the fixed seat is fixedly connected with a second sliding bar, the side of the second sliding bar is fixedly connected with a limiting assembly, the top of the limiting assembly is communicated with an oil return pipe, the fixed seat is slidably connected with the limiting ring through the second sliding bar, the top of the spring rod is fixedly connected with the bottom of the backflow device, and the side of the oil return pipe is communicated with the side of the backflow device.

[0009] Preferably, the limiting assembly comprises a limiting seat, the bottom of the limiting seat is provided with a lower guide groove, the inner wall of the lower guide groove is provided with an oil outlet hole at the top, the inner wall of the oil outlet hole is provided with an oil feeding hole at the top, the top of the oil feeding hole is communicated with the bottom of the oil return pipe, the side surface of the limiting seat is slidably connected with the inner wall of the limiting ring, the spray pipe is slidably placed on the top of the protective cylinder along the side surface of the fixed support, the bottom of the spray pipe is in contact with the top of the protective cylinder, the top of the oil feeding pipe is in contact with the bottom of the spray pipe along the protective cylinder, the test paper is placed around the protective cylinder under the joint 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 is in contact with the top of the spray pipe, the top of the spray pipe is kept in the center alignment of the spray head opening and the oil feeding hole under the guidance of the lower guide groove, and the collection of the arc-shaped spray is realized through the oil outlet hole, so that the kerosene enters into the inside of the oil return pipe along the inner wall of the oil feeding hole and enters into the inside of the reflux device for reflux and recycling, when the spray pipe is placed on the top of the protective cylinder, the spray pipe is pre-pressed on the top of the oil feeding pipe by the limiting seat under the elastic force provided by the spring rod, thereby positioning in advance, and the spray pipe is elastically fixed by the spring rod, thereby facilitating the placement, and the setting of the protective cylinder avoids the situation that the oil feeding pipe is not accidentally stained on the test paper after descending into the inside of the protective cylinder, thereby affecting the test result.

[0010] Preferably, the reflux device comprises a reflux top plate, the bottom of the reflux top plate is fixedly connected with a connecting support, the bottom of the connecting support is fixedly connected with a conical pipe, the bottom of the conical pipe is communicated with a one-way valve, the bottom of the one-way valve is communicated with a reflux pipe, the bottom of the reflux top plate is fixedly connected with a fixed frame on one side of the connecting support, the bottom of the reflux pipe is communicated with the top of the oil storage tank, the bottom of the fixed frame is fixedly connected with the top of the fixed bottom plate, the side surface of the conical pipe is communicated with the side surface of the oil return pipe, the kerosene flows along the oil return pipe and enters into the inside of the conical pipe, and is gathered under the guidance of the conical pipe, and is gathered on the top of the one-way valve and enters into the inside of the reflux pipe along the one-way valve to flow into the inside of the oil storage tank, thereby realizing the reflux of the kerosene, and the one-way valve is automatically opened when the hydraulic push plate descends, thereby making the kerosene unidirectionally flow into the inside of the oil storage tank, and preventing the kerosene from flowing when the pressure is increased, thereby facilitating the reflux of the kerosene, and the one-way transmission facilitates the sealing test.

[0011] The present application provides an aero-engine fuel nozzle sealing detection equipment. The following advantages are achieved: 1. The aero-engine fuel nozzle sealing detection equipment is provided with a first motor, the driving shaft of the first motor drives the first worm to rotate, the first worm drives the first worm gear to rotate, the first worm gear drives the first screw rod to ascend or descend, the first screw rod ascends to drive the hydraulic push plate to move, the hydraulic push plate moves to extrude kerosene, so that the kerosene flows along the flow guide opening, so that the kerosene is discharged along the flow guide pipe, thereby pressurizing the nozzle, thereby detecting the sealing of the nozzle, and the one-way transmission between the first screw rod, the first worm gear and the first worm gear ensures that the pressure is maintained after pressurization, thereby continuously pressurizing the nozzle, thereby facilitating long-term sealing detection.

[0012] 2. The aero-engine fuel nozzle sealing detection equipment is provided with an electric worm, the electric worm drives the second hollow worm gear to rotate, the second hollow worm gear drives the second worm gear to rotate, the second worm gear drives the hollow screw rod to ascend, the hollow screw rod ascends to drive the oil feeding pipe to ascend, the oil feeding pipe ascends to drive the nozzle to be fixed inside the limiting device, and the oil inlet hole of the nozzle is in contact with the top of the oil feeding pipe, and is kept in sealing contact with the nozzle under the guidance of the positioning groove, and the position of the oil feeding pipe is fixed by the first sliding bar to avoid accidental penetration caused by rotation, and at the same time, the kerosene enters the hollow screw rod through the fixed sliding pipe and enters the nozzle along the inside of the oil feeding pipe, thereby performing sealing test, and the second worm gear and the hollow screw rod are threadedly connected, thereby keeping close contact with the bottom of the nozzle during sealing test, thereby facilitating long-term sealing test.

[0013] 3. The aero-engine fuel nozzle sealing detection equipment is provided with a fixed support, the nozzle is placed on the top of the protective cylinder along the side of the fixed support, the bottom of the nozzle is in contact with the top of the protective cylinder, the top of the oil feeding pipe is in contact with the bottom of the nozzle along the protective cylinder, and the test paper is placed around the protective cylinder under the joint action of the limiting groove and the protective cylinder, thereby facilitating observation of the permeability during sealing test, the bottom of the limiting seat is in contact with the top of the nozzle, the top of the nozzle is kept in center alignment of the nozzle opening and the oil feeding hole under the guidance of the lower guide groove, and the arc-shaped spray is collected through the oil outlet hole, so that the kerosene enters the inside of the oil return pipe along the inner wall of the oil feeding hole and enters the inside of the return device for return and recycling, when the nozzle is placed on the top of the protective cylinder, the nozzle is pre-pressed on the top of the oil feeding pipe under the elastic force provided by the spring rod driven by the limiting seat, thereby positioning in advance, and the nozzle is elastically fixed by the spring rod, thereby facilitating placement, and the protective cylinder is provided to avoid accidental contamination of the test paper when the oil feeding pipe descends into the protective cylinder.

[0014] 4. The aero-engine fuel nozzle leak detection device is provided with an oil return pipe, kerosene flows along the oil return pipe and enters the inside of the conical pipe, and is gathered under the guidance of the conical pipe, and is gathered on the top of the check valve and enters the inside of the return pipe along the check valve and returns to the inside of the oil tank, so as to return the kerosene, and the check valve is automatically opened under the hydraulic push plate descending, so that the kerosene unidirectionally returns to the inside of the oil tank, and the kerosene flow is prevented by the check valve when pressurizing, so as to facilitate the return of kerosene, and the one-way transmission facilitates the leak test. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic structural view of the aero-engine fuel nozzle leak detection device of the application; Figure 2 It is a schematic structural view of the pressurizing device of the application; Figure 3 It is a schematic structural view of the test device of the application; Figure 4 It is a schematic structural view of the positioning assembly of the application; Figure 5 It is a schematic structural view of the limiting device of the application; Figure 6 It is a schematic structural view of the elastic assembly of the application; Figure 7 It is a schematic structural view of the limiting assembly of the application; Figure 8 It is a schematic structural view of the return device of the application.

[0016] In the figure: 1, the device base; 2, the device support; 3, the booster; 4, the testing device; 5, the backflow device; 301, the first worm gear; 302, the first screw rod; 303, the hydraulic push plate; 304, the oil storage tank; 305, the flow guide; 306, the flow guide pipe; 307, the first worm; 308, the first motor; 401, the fixed bottom plate; 402, the first hollow worm gear; 403, the second hollow worm gear; 404, the electric worm; 405, the positioning assembly; 406, the limiting device; 407, the elastic assembly; 4051, the oil feeding pipe; 4052, the positioning groove; 4053, the first sliding bar; 4054, the hollow screw rod; 4055, the second worm gear; 4056, the fixed sliding pipe; 4061, the fixed cylinder; 4062, the limiting groove; 4063, the protection cylinder; 4064, the first sliding groove; 4065, the fixed support; 4066, the limiting ring; 4067, the second sliding groove; 4071, the spring rod; 4072, the fixed seat; 4073, the second sliding bar; 4074, the limiting assembly; 4075, the oil return pipe; 40741, the limiting seat; 40742, the lower guide groove; 40743, the oil outlet hole; 40744, the oil feeding hole; 501, the backflow top plate; 502, the connecting support; 503, the conical pipe; 504, the one-way valve; 505, the backflow pipe; 506, the fixed frame. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] Please refer to Figures 1-2 The present application provides a technical solution: an aero-engine fuel nozzle sealing detection device, which comprises a device base 1, the bottom of the device base 1 is fixedly connected with a device support 2, the top of the device base 1 is fixedly connected with a booster 3, the top of the booster 3 is fixedly connected with a testing device 4, the top of the testing device 4 is fixedly connected with a backflow device 5, and the bottom of the backflow device 5 penetrates the inside of the testing device 4 and communicates with the top of the booster 3.

[0019] The device base 1 and the device support 2 support the device as a whole, the booster 3 pushes kerosene and keeps it in a compressed state after boosting through one-way transmission, thereby facilitating long-time sealing test, the testing device 4 fixes the nozzle and performs permeability test through annular test paper, thereby intuitively observing the sealing performance of the nozzle after boosting, the backflow device 5 recycles kerosene, thereby facilitating recycling, and the testing device 4 synchronously tests multiple nozzles, thereby improving the test efficiency.

[0020] The booster device 3 comprises a first worm wheel 301, a first screw rod 302 is screwed at the top of the first worm wheel 301, a hydraulic push plate 303 is rotatably connected at the top of the first screw rod 302, an oil storage tank 304 is sleeved and slidably connected at the side of the hydraulic push plate 303, a flow guide opening 305 is formed at the top of the inner wall of the oil storage tank 304, a flow guide pipe 306 is communicated with the top of the oil storage tank 304, the bottom of the flow guide pipe 306 is communicated with the top of the flow guide opening 305, a first worm gear 307 is engaged with the side of the first worm wheel 301, a driving shaft of a first motor 308 is fixedly connected with the side of the first worm gear 307, the first motor 308 is fixedly connected with the top of the equipment base 1 through a support, and the bottom of the first worm wheel 301 is rotatably connected with the top of the equipment base 1.

[0021] The first motor 308 is started, the driving shaft of the first motor 308 drives the first worm gear 307 to rotate, the first worm gear 307 drives the first worm wheel 301 to rotate, the first worm wheel 301 drives the first screw rod 302 to ascend or descend, the first screw rod 302 drives the hydraulic push plate 303 to move, the hydraulic push plate 303 extrudes kerosene to flow along the flow guide opening 305, and the kerosene is discharged along the flow guide pipe 306, so that the nozzle is pressurized, the sealing performance of the nozzle is detected, and the one-way transmission between the first screw rod 302 and the first worm wheel 301 and the first worm wheel 301 and the first worm gear 307 is guaranteed, so that the nozzle is continuously pressurized and kept in a fixed position, so that the sealing performance of the nozzle is continuously detected for a long time.

[0022] Please refer to Figures 1-4 The application provides a technical scheme: the testing device 4 comprises a fixed base plate 401, a first hollow worm wheel 402 is rotatably connected at the top of the fixed base plate 401, a second hollow worm wheel 403 is fixedly connected at the bottom of the first hollow worm wheel 402, a driving end of an electric worm gear 404 is engaged with the side of the second hollow worm wheel 403, a positioning assembly 405 is engaged with the side of the first hollow worm wheel 402, a limiting device 406 is sleeved and slidably connected at the side of the positioning assembly 405, an elastic assembly 407 is slidably connected at the top of the limiting device 406, the top of the elastic assembly 407 is fixedly connected with the bottom of the backflow device 5, the bottom of the electric worm gear 404 is fixedly connected with the top of the oil storage tank 304, and the bottom of the second hollow worm wheel 403 is rotatably connected with the top of the oil storage tank 304.

[0023] The positioning assembly 405 comprises an oil feeding pipe 4051, the top of the oil feeding pipe 4051 is provided with a positioning groove 4052, the side of the oil feeding pipe 4051 is fixedly connected with a first sliding bar 4053, the bottom of the oil feeding pipe 4051 is rotatably connected with a hollow screw rod 4054, the side of the hollow screw rod 4054 is threadedly connected with a second worm wheel 4055, the bottom of the second worm wheel 4055 is rotatably connected with a fixed sliding pipe 4056, the fixed sliding pipe 4056 is sleeved on the side of the flow guide pipe 306 and is slidably connected with the flow guide pipe 306, and the side of the second worm wheel 4055 is engaged with the side of the first hollow worm wheel 402.

[0024] The electric worm 404 is started, the second hollow worm wheel 403 is driven to rotate by the electric worm 404, the second worm wheel 4055 is driven to rotate by the second hollow worm wheel 403, the hollow screw rod 4054 is driven to ascend by the second worm wheel 4055, the oil feeding pipe 4051 is driven to ascend by the hollow screw rod 4054, the spray pipe is fixed in the inside of the limiting device 406 by the oil feeding pipe 4051, the oil inlet hole of the spray pipe is in contact with the top of the oil feeding pipe 4051, the oil feeding pipe 4051 keeps sealed contact with the spray pipe under the guidance of the positioning groove 4052, the position of the oil feeding pipe 4051 is fixed by the first sliding bar 4053, so that rotation is avoided to cause accidental penetration, at the same time, kerosene enters the hollow screw rod 4054 through the fixed sliding pipe 4056 and enters the spray pipe along the inside of the oil feeding pipe 4051, so that the sealing test is carried out, and the second worm wheel 4055 keeps close contact with the bottom of the spray pipe during the sealing test, so that the sealing test for a long time is facilitated.

[0025] Please refer to Figures 1-7 The application provides a technical scheme: the limiting device 406 comprises a fixed cylinder 4061, the top of the fixed cylinder 4061 is provided with a limiting groove 4062, the top of the fixed cylinder 4061 is fixedly connected with a protection cylinder 4063 on one side of the limiting groove 4062, the inner wall of the fixed cylinder 4061 is provided with a first sliding groove 4064 matched with the first sliding bar 4053, the side of the fixed cylinder 4061 is fixedly connected with a fixed support 4065, the top of the fixed support 4065 is fixedly connected with a limiting ring 4066, the top of the limiting ring 4066 is provided with a second sliding groove 4067, and the bottom of the fixed support 4065 is fixedly connected with the top of the oil storage tank 304, the oil feeding pipe 4051 is slidably connected with the inner wall of the fixed cylinder 4061 through the first sliding bar 4053.

[0026] The elastic assembly 407 comprises a spring rod 4071, a movable end of the spring rod 4071 is fixedly connected with a fixing seat 4072, the bottom of the fixing seat 4072 is fixedly connected with a second sliding bar 4073, the side surface of the second sliding bar 4073 is fixedly connected with a limiting assembly 4074, the top of the limiting assembly 4074 is communicated with an oil return pipe 4075, the fixing seat 4072 is slidably connected with the limiting ring 4066 through the second sliding bar 4073, the top of the spring rod 4071 is fixedly connected with the bottom of the backflow device 5, and the side surface of the oil return pipe 4075 is communicated with the side surface of the backflow device 5.

[0027] The limiting assembly 4074 comprises a limiting seat 40741, the bottom of the limiting seat 40741 is provided with a lower guide groove 40742, the inner wall top of the lower guide groove 40742 is provided with an oil outlet hole 40743, the inner wall top of the oil outlet hole 40743 is provided with an oil feeding hole 40744, the top of the oil feeding hole 40744 is communicated with the bottom of the oil return pipe 4075, and the side surface of the limiting seat 40741 is slidably connected with the inner wall of the limiting ring 4066.

[0028] The spray pipe is slidably arranged at the top of the protective cylinder 4063 along the side surface of the fixing support 4065, the bottom of the spray pipe is in contact with the top of the protective cylinder 4063, the top of the oil feeding pipe 4051 is in contact with the bottom of the spray pipe along the protective cylinder 4063, the test paper is arranged around the protective cylinder 4063 under the cooperation of the limiting groove 4062 and the protective cylinder 4063, so that the permeability can be observed when the sealing test is carried out, the bottom of the limiting seat 40741 is in contact with the top of the spray pipe, the top of the spray pipe is kept in the center alignment of the nozzle port and the oil feeding hole 40744 under the guidance of the lower guide groove 40742, and the arc-shaped spray is collected through the oil outlet hole 40743, so that the kerosene enters into the inside of the oil return pipe 4075 along the inner wall of the oil feeding hole 40744 and enters into the inside of the backflow device 5 to backflow and be recycled, when the spray pipe is arranged at the top of the protective cylinder 4063, the spray pipe is pre-pressed on the top of the oil feeding pipe 4051 under the elastic force provided by the spring rod 4071 and driven by the limiting seat 40741, so that the positioning is carried out in advance, the spray pipe is elastically fixed through the spring rod 4071, so that the spray pipe can be conveniently arranged, and the arrangement of the protective cylinder 4063 avoids that the oil feeding pipe 4051 is accidentally stained on the test paper after descending into the inside of the protective cylinder 4063 and affects the test result.

[0029] Please refer to Figures 1-8The application provides a technical scheme: the backflow device 5 comprises a backflow top plate 501, the bottom of the backflow top plate 501 is fixedly connected with a connecting support 502, the bottom of the connecting support 502 is fixedly connected with a conical pipe 503, the bottom of the conical pipe 503 is communicated with a one-way valve 504, the bottom of the one-way valve 504 is communicated with a backflow pipe 505, the bottom of the backflow top plate 501 is fixedly connected with a fixing frame 506 at one side of the connecting support 502, the bottom of the backflow pipe 505 is communicated with the top of the oil storage tank 304, the bottom of the fixing frame 506 is fixedly connected with the top of the fixed bottom plate 401, and the side of the conical pipe 503 is communicated with the side of the oil return pipe 4075.

[0030] The kerosene flows along the oil return pipe 4075 and enters the inside of the conical pipe 503, is gathered under the guidance of the conical pipe 503, is gathered on the top of the one-way valve 504 and enters the inside of the backflow pipe 505 along the one-way valve 504 and flows into the inside of the oil storage tank 304, so that the kerosene is backflowed, the one-way valve 504 is automatically opened when the hydraulic push plate 303 is lowered, so that the kerosene is backflowed into the inside of the oil storage tank 304, and the kerosene is prevented from flowing through the one-way valve 504 when pressure boosting is carried out, so that the kerosene is backflowed, and the one-way transmission facilitates sealing test.

[0031] Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the application. The structures, devices and operation methods not specifically described and explained in the application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. An aircraft engine fuel nozzle leak detection apparatus, characterized by: The utility model provides a kind of equipment for testing and testing, including equipment base (1), the bottom of the equipment base (1) is fixedly connected with equipment support (2), the top of the equipment base (1) is fixedly connected with booster (3), the top of the booster (3) is fixedly connected with testing device (4), the top of the testing device (4) is fixedly connected with backflow device (5), the bottom of the backflow device (5) is through the inside of testing device (4) and is communicated with the top of booster (3); The booster (3) includes a first worm wheel (301), the top of the first worm wheel (301) is threaded with a first screw rod (302), the top of the first screw rod (302) is rotatably connected with a hydraulic push plate (303), the side of the hydraulic push plate (303) is sleeved and slidably connected with an oil storage tank (304), the inner wall top of the oil storage tank (304) is provided with a flow guide opening (305), the top of the oil storage tank (304) is communicated with a flow guide pipe (306), the bottom of the flow guide pipe (306) is communicated with the top of the flow guide opening (305), the side of the first worm wheel (301) is engaged with a first worm (307), the side of the first worm (307) is fixedly connected with the drive shaft of a first motor (308), the first motor (308) is fixedly connected with the top of the equipment base (1) by a support, and the bottom of the first worm wheel (301) is rotatably connected with the top of the equipment base (1).

2. An aircraft engine fuel nozzle leak detection apparatus as defined in claim 1, wherein: The testing device (4) includes a fixed base plate (401), the top of the fixed base plate (401) is rotatably connected with a first hollow worm wheel (402), the bottom of the first hollow worm wheel (402) is fixedly connected with a second hollow worm wheel (403), the side of the second hollow worm wheel (403) is engaged with the drive end of an electric worm (404), the side of the first hollow worm wheel (402) is engaged with a positioning assembly (405), the side of the positioning assembly (405) is sleeved and slidably connected with a limiting device (406), the top of the limiting device (406) is slidably connected with an elastic assembly (407), the top of the elastic assembly (407) is fixedly connected with the bottom of the backflow device (5), the bottom of the electric worm (404) is fixedly connected with the top of the oil storage tank (304), and the bottom of the second hollow worm wheel (403) is rotatably connected with the top of the oil storage tank (304).

3. An aeroengine fuel nozzle leak detection apparatus according to claim 2, wherein: The positioning assembly (405) comprises an oil feeding pipe (4051), the top of the oil feeding pipe (4051) is provided with a positioning groove (4052), the side of the oil feeding pipe (4051) is fixedly connected with a first sliding bar (4053), the bottom of the oil feeding pipe (4051) is rotatably connected with a hollow screw rod (4054), the side of the hollow screw rod (4054) is threadedly connected with a second worm wheel (4055), the bottom of the second worm wheel (4055) is rotatably connected with a fixed sliding pipe (4056), the fixed sliding pipe (4056) is sleeved on the side of the flow guide pipe (306) and is slidably connected with the flow guide pipe (306), and the side of the second worm wheel (4055) is engaged with the side of the first hollow worm wheel (402).

4. An aeroengine fuel nozzle leak detection apparatus according to claim 3, wherein: The limiting device (406) comprises a fixed cylinder (4061), the top of the fixed cylinder (4061) is provided with a limiting groove (4062), the top of the fixed cylinder (4061) is fixedly connected with a protection cylinder (4063) on one side of the limiting groove (4062), the inner wall of the fixed cylinder (4061) is provided with a first sliding groove (4064) matched with the first sliding bar (4053), the side of the fixed cylinder (4061) is fixedly connected with a fixed support (4065), the top of the fixed support (4065) is fixedly connected with a limiting ring (4066), the top of the limiting ring (4066) is provided with a second sliding groove (4067), and the bottom of the fixed support (4065) is fixedly connected with the top of the oil storage tank (304). The oil feeding pipe (4051) is slidably connected with the inner wall of the fixed cylinder (4061) through the first sliding bar (4053).

5. An aircraft engine fuel nozzle leak detection apparatus as recited in claim 2, characterized by: The elastic assembly (407) comprises a spring rod (4071), the movable end of the spring rod (4071) is fixedly connected with a fixed seat (4072), the bottom of the fixed seat (4072) is fixedly connected with a second sliding bar (4073), the side of the second sliding bar (4073) is fixedly connected with a limiting assembly (4074), the top of the limiting assembly (4074) is communicated with an oil return pipe (4075), the fixed seat (4072) is slidably connected with the limiting ring (4066) through the second sliding bar (4073), the top of the spring rod (4071) is fixedly connected with the bottom of the backflow device (5), and the side of the oil return pipe (4075) is communicated with the side of the backflow device (5).

6. An aeroengine fuel nozzle leak detection apparatus according to claim 5, wherein: The limiting assembly (4074) comprises a limiting seat (40741), the bottom of the limiting seat (40741) is provided with a lower guide groove (40742), the inner wall top of the lower guide groove (40742) is provided with an oil outlet hole (40743), and the inner wall top of the oil outlet hole (40743) is provided with an oil feeding hole (40744).

7. An aeroengine fuel nozzle leak detection apparatus according to claim 6, wherein: The top of the oil feeding hole (40744) is communicated with the bottom of the oil return pipe (4075), and the side of the limiting seat (40741) is slidably connected with the inner wall of the limiting ring (4066).

8. An aircraft engine fuel nozzle leak detection apparatus as defined in claim 5, wherein: The backflow device (5) comprises a backflow top plate (501), the bottom of the backflow top plate (501) is fixedly connected with a connecting support (502), the bottom of the connecting support (502) is fixedly connected with a conical pipe (503), the bottom of the conical pipe (503) is communicated with a one-way valve (504), the bottom of the one-way valve (504) is communicated with a backflow pipe (505), and the bottom of the backflow top plate (501) is fixedly connected with a fixing frame (506) on one side of the connecting support (502).

9. An aeroengine fuel nozzle leak detection apparatus according to claim 8, characterised in that: The bottom of the backflow pipe (505) is communicated with the top of the oil storage tank (304), the bottom of the fixing frame (506) is fixedly connected with the top of the fixed bottom plate (401), and the side of the conical pipe (503) is communicated with the side of the oil return pipe (4075).

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