Airtightness test device for buffer strut of undercarriage

Abstract

The utility model discloses an undercarriage buffer strut sealing performance test device comprising a box body, the top of which is open; the lifting mechanism is fixed on the bottom wall of the box body, and the lifting end of the lifting mechanism is connected with a bracket used for placing a to-be-tested piece; the detection medium is contained in the box body and immerses the to-be-detected piece on the bracket, and the detection medium visually detects an air leakage point of the to-be-detected piece through bubbles; the detection medium filter is mounted on the outer side wall of the box body, and the detection medium filter is connected with the box body through a pipeline to construct a medium filtering loop; the circulating pump is mounted on the medium filtering loop and pumps the detection medium; the electric control box is installed on the outer side wall of the box body and connected with the lifting mechanism and the circulating pump through electric signals. The device is simple in structure, and can rapidly achieve the detection of the sealing performance of the undercarriage buffer strut.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the aircraft landing gear buffer pillar leakproofness test detection process technical field, concretely relates to a landing gear buffer pillar leakproofness test device. BACKGROUND

[0002] The aircraft landing gear buffer pillar is an important accessory in the landing of the aircraft, is mainly used for absorbing and buffering the huge energy produced when the aircraft lands, reduces the influence of the impact force on the aircraft body, airborne equipment and the pilot, ensures safe landing. The buffer cavity of the landing gear buffer pillar is composed of oil gas mixture, and the gas cylinder cavity fills compressed nitrogen to provide the gas source in the emergency state of the aircraft. The advantages and disadvantages of the sealing performance of the landing gear buffer pillar have important influence on the realization of the above functions. In order to realize the judgment of the advantages and disadvantages of the sealing performance of the landing gear buffer pillar, the structure characteristics and test requirements of the landing gear buffer pillar need to be combined, a landing gear buffer pillar leakproofness test device is designed, and the sealing performance of the aircraft landing gear buffer pillar is rapidly detected.

[0003] Therefore, how to provide a landing gear buffer pillar leakproofness test device is a problem to be solved by the person skilled in the art. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a landing gear buffer pillar leakproofness test device, can accurately and effectively visualize the landing gear buffer pillar leakproofness, observes the air leakage point of the landing gear buffer pillar sealing part through vision, thereby solve the problem that the landing gear buffer pillar leakproofness cannot be rapidly and accurately detected.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a landing gear buffer pillar leakproofness test device, it includes:

[0006] The box is open at the top;

[0007] The lifting mechanism is fixed on the bottom wall of the box, and the lifting end of the lifting mechanism is connected with the bracket for placing the measured piece;

[0008] The detection medium is filled in the inside of the box and immerses the measured piece on the bracket, and the detection medium detects the air leakage point of the measured piece through bubble visualization;

[0009] The detection medium filter is installed on the outer side wall of the box, and the detection medium filter is connected with the box through the pipeline and constructs the medium filtering loop;

[0010] The circulating pump is installed on the medium filtering loop and pumps the detection medium;

[0011] An electric control box is mounted on the outer side wall of the box body, and the electric control box is electrically connected with the lifting mechanism and the circulating pump respectively.

[0012] The box body provides a holding cavity for detecting medium, the lifting mechanism is used for supporting the to-be-detected member to be immersed in the detecting medium, and the leakage point of the to-be-detected member can be visually observed by relying on the phenomenon that the air leakage part generates continuous bubbles in the detecting medium, so that the rapid detection of the sealing performance of the to-be-detected member is realized.

[0013] Preferably, the box body is connected with an electric roller shutter door corresponding to the top opening, the electric roller shutter door is used for shielding the top opening of the box body, and the electric roller shutter door is electrically connected with the electric control box.

[0014] Therefore, the electric roller shutter door can close the top opening of the box body, and in the non-use state, the impurities can not pollute the detecting medium in the box.

[0015] Preferably, the electric roller shutter door is an explosion-proof electric roller shutter door, the box body is provided with a track for sliding of a folding door body at the top edge, and the electric roller shutter door is controlled to open and close by a driving motor and a transmission chain.

[0016] Therefore, the explosion-proof electric roller shutter door is safe to use, is suitable for harsh working environments, and is controlled by the electric control box, so that the use is convenient.

[0017] Preferably, the lifting mechanism is a scissor-type lifting mechanism, a power part of the lifting mechanism is a hydraulic oil cylinder, the hydraulic oil cylinder controls the lifting end to go up and down, and a power control part of the lifting mechanism includes a motor, an oil pump and a control module.

[0018] Therefore, the scissor-type lifting mechanism is reliable in lifting, the power part is realized by the hydraulic oil cylinder, the lifting end is controlled to go up and down, the power control part of the lifting mechanism controls the working state of the oil pump, the liquid pumping state is accurately adjusted, and therefore the immersion depth of the to-be-detected member is accurately controlled.

[0019] Preferably, the detecting medium is an oil medium.

[0020] The technical effect generated thereby is that the oil liquid medium has less side effect on the landing gear buffer strut, and the bubbling phenomenon of the air leakage point can be observed accurately.

[0021] Preferably, the oil liquid medium is transformer oil.

[0022] The technical effect generated thereby is that the insulation is good, the ignition is not easy, the density is small, the water and impurities in the oil are easy to precipitate, the oil clarity is easy to maintain, and the oil liquid is easy to filter in the later period.

[0023] Preferably, the detection medium filter is an oil filter, and the oil filter is connected in series on the medium filtering loop.

[0024] The technical effect generated thereby is that since the to-be-detected member is the landing gear buffer strut, impurities will appear in the oil liquid after multiple tests, which will affect the oil clarity and thus affect the visual observation, and the oil filter can remove the impurities in the oil liquid to ensure the oil clarity and meet the visual observation condition.

[0025] Preferably, the bracket is a rectangular structure frame, a plurality of adjusting cross bars are slidably connected to the bracket, and a clamping seat for supporting the to-be-detected member is slidably connected to the adjusting cross bar.

[0026] The technical effect generated thereby is that the rectangular structure frame can reduce the influence of obstacles on the visual observation, so as to accurately determine the position of the air leakage point, and the plurality of adjusting cross bars and the clamping seat slidably connected to the adjusting cross bar for supporting the to-be-detected member can stably place the to-be-detected member of different models, so as to facilitate the detection and positioning. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 It is a whole structure diagram of the landing gear buffer strut sealing property test device.

[0028] Fig. 2 It is an in-box state diagram of the landing gear buffer strut sealing property test device.

[0029] Fig. 3 It is a circulating pump and electric control box installation schematic diagram of the landing gear buffer strut sealing property test device.

[0030] Fig. 4 It is a lifting mechanism schematic diagram of the landing gear buffer strut sealing property test device.

[0031] 1 box body, 2 lifting mechanism, 201 power part, 202 power control part, 3 to-be-detected member, 4 bracket, 401 adjusting cross bar, 402 clamping seat, 5 detection medium filter, 6 circulating pump, 7 electric control box, 8 electric roller shutter door, 9 track. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Referring to the drawings of the utility model Figs. 1 to 4 According to the landing gear buffer strut sealing test device in the embodiments of the utility model, which comprises:

[0034] The box body 1 is open at the top;

[0035] The lifting mechanism 2 is fixed on the bottom wall of the box body 1, and the lifting end of the lifting mechanism 2 is connected with a bracket 4 for placing the measured member 3; the measured member is a landing gear buffer strut filled with nitrogen;

[0036] The detection medium is contained in the inside of the box body 1 and immerses the measured member 3 on the bracket, the detection medium detects the air leakage point of the measured member 3 through bubble visualization, and the transformer oil is selected as the detection medium in the embodiment;

[0037] The detection medium filter 5 is installed on the outer side wall of the box body 1, the detection medium filter 5 is connected with the box body through the pipeline and constructs a medium filtering circuit, after long-term multiple tests, the impurities in the oil liquid affect the oil liquid clarity, thereby affecting the visualization observation, the detection medium filter is used to filter and clean the impurities in the oil liquid in time, thereby guaranteeing the visualization detection requirement;

[0038] The circulating pump 6 is installed on the medium filtering circuit and pumps the detection medium, and is started when cleaning the impurities in the oil liquid;

[0039] The electric control box 7 is installed on the outer side wall of the box body 1, and the electric control box 7 is electrically connected with the lifting mechanism 2 and the circulating pump 6 respectively.

[0040] In specific use, the box body 1 is connected with the electric roller shutter door 8 corresponding to the open top, the electric roller shutter door 8 is used for shielding the open top of the box body 1, and the electric roller shutter door 8 is electrically connected with the electric control box 7, so as to avoid the pollution of the impurities outside to the oil liquid in the box.

[0041] In specific use, the electric roller shutter door 8 is an explosion-proof electric roller shutter door, the box body 1 is provided with the track 9 for sliding of the folding door body on the top edge, the electric roller shutter door 8 is driven by the driving motor and the transmission chain to control the opening and closing of the folding door body, and the driving motor is electrically connected with the electric control box 7.

[0042] In some other embodiments, the lifting mechanism 2 is a scissor lifting mechanism, the power part 201 of the lifting mechanism 2 is a hydraulic cylinder, the hydraulic cylinder controls the lifting end to go up and down, the power control part 202 of the lifting mechanism 2 includes a motor, an oil pump and a control module, the motor serves as a power source and controls the pumping state of the oil pump, the control module is electrically connected with the motor and an electric control box, and the oil pump is connected with the hydraulic cylinder through a pipeline.

[0043] The scissor lifting mechanism has high stability after lifting, has a wide operation platform and high carrying capacity, and has high operation efficiency. The advantages of the cylinder stroke can be maximized to ensure the requirements of the container medium storage. The space layout of the lifting mechanism is compact, the lifting is stable, and the lifting mechanism can be efficiently lifted by only one key start and can be automatically operated. The mode includes an electric control mode and a manual control mode, and the lifting end can be stopped at any position of the stroke.

[0044] It should be noted that, under the rated power, the lifting mechanism of the device only needs to give a control electric signal, controls the motor to reverse, and the oil cylinder can perform linear reciprocating motion as required. In a larger application field, the device can replace the traditional hydraulic pump station.

[0045] The rated pressure of the oil pump is 20 MPa, and the pump displacement is 1.5 ml / r hydraulic output.

[0046] In some other embodiments, the medium filter 5 is an oil filter, and the oil filter is connected in series on the medium filtering circuit.

[0047] In some other specific embodiments, the bracket 4 is a rectangular structure frame, which can reduce the obstacles when the staff observes the air leakage points compared with a plate structure. Two adjusting cross bars 401 are slidably connected to the bracket 4, and two clamping seats 402 for supporting the to-be-tested member are slidably connected to each adjusting cross bar 401, so that the to-be-tested member can be stably placed and is not rolled back and forth on the bracket. The positions of the adjusting cross bars and the clamping seats can be adjusted to adapt to supporting different models of to-be-tested members.

[0048] In order to facilitate the turnover use, power wheels are arranged at the bottom of the box body, so that the equipment can be moved.

[0049] In specific implementation, transformer oil is added to the box body 6, the landing gear buffer strut filled with compressed nitrogen is installed on the bracket 4 of the lifting mechanism 2, the button on the electric control box 7 is operated to control the power part 201 of the lifting mechanism to retract, the landing gear buffer strut descends with the lifting end of the lifting mechanism and is immersed in the transformer oil, whether continuous bubbles emerge from the sealing part of the landing gear buffer strut and slowly move in the transformer oil is observed by visually observing through the transformer oil, if no continuous bubbles emerge, it indicates that the sealing performance of the landing gear buffer strut is qualified, and if continuous bubbles emerge and slowly move in the transformer oil, it indicates that the sealing performance of the landing gear buffer strut is unqualified.

[0050] After multiple tests, impurities appear in the transformer oil, and the turbidity of the transformer oil is controlled by the button on the electric control box 7 to start the circulating pump 6 to drive the transformer oil into the detection medium filter to filter out the impurities in the transformer oil, so that the transformer oil is clear and meets the visual observation conditions.

[0051] After the test, the electric control box 7 on the button controls the electric roller shutter door 8 to close, covering the top opening of the box. Preventing external objects from polluting the transformer oil and affecting the visual observation results in the later use.

[0052] For the device and the use method disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part is referred to the method part.

[0053] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A landing gear buffer strut sealing test device, characterized in that: The utility model relates to a kind of detection device for transformer oil leakage point, including: Box (1), the top of the box (1) is open; Lifting mechanism (2), the bottom wall of the box (1) is fixed, the lifting end of the lifting mechanism (2) is connected with bracket (4) for placing the piece to be measured (3); Detection medium, the detection medium is filled in the inside of the box (1) and immerses the piece to be measured (3) on bracket, and the detection medium detects the air leakage point of the piece to be measured (3) by bubble visualization; Detection medium filter (5), the detection medium filter (5) is installed on the outer side wall of the box (1), and the detection medium filter (5) is connected with box by pipeline and constructs medium filtering circuit; Circulating pump (6), the circulating pump (6) is installed on medium filtering circuit and pumps detection medium; Electric control box (7), the electric control box (7) is installed on the outer side wall of the box (1), and the electric control box (7) is electrically connected with lifting mechanism (2) and circulating pump (6) respectively.

2. The landing gear shock strut seal integrity test device of Claim 1, wherein, The box (1) is connected with electric roller shutter door (8) corresponding top opening, and the electric roller shutter door (8) is used to shield the top opening of the box (1), and the electric roller shutter door (8) is electrically connected with the electric control box (7).

3. The landing gear shock strut seal integrity test device of Claim 2, wherein, The electric roller shutter door (8) is an explosion-proof electric roller shutter door, and the top edge of the box (1) is provided with a track (9) for sliding of the folding door body, and the electric roller shutter door (8) is opened and closed by a driving motor and a transmission chain.

4. The landing gear shock strut seal integrity test device of Claim 1, wherein, The lifting mechanism (2) is a scissor lifting mechanism, the power part (201) of the lifting mechanism (2) is a hydraulic cylinder, the hydraulic cylinder controls the lifting end to go up and down, the power control part (202) of the lifting mechanism (2) includes a motor, an oil pump and a control module, the motor is used as a power source and controls the pumping state of the oil pump, the control module is electrically connected with the motor and the electric control box, and the oil pump is connected with the hydraulic cylinder by pipeline.

5. The landing gear shock strut seal integrity test apparatus of any one of claims 1-4, wherein, The detection medium is oil medium.

6. The landing gear shock strut seal integrity test device of Claim 5, wherein, The oil medium is transformer oil.

7. The landing gear shock strut seal integrity test device of Claim 5, wherein, The detection medium filter (5) is an oil filter, and the oil filter is connected in series in the medium filtering circuit.

8. The landing gear shock strut seal integrity test device of Claim 5, wherein, The bracket (4) is a rectangular structure frame, a plurality of adjusting cross bars (401) are slidably connected to the bracket (4), and a clamping seat (402) for supporting the piece to be measured is slidably connected to the adjusting cross bar (401).

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