CN220160821U - Automatic cleaning device for auxiliary fuel tank of airplane - Google Patents

Abstract

The utility model discloses an automatic cleaning device for an aircraft auxiliary fuel tank, which comprises a base, a mounting frame, a profiling bracket and a driving assembly, wherein the mounting frame is arranged on the base in a manner of swinging up and down by taking the base as a center pivot, two ends of the profiling bracket are rotatably arranged at two ends of the mounting frame, the profiling bracket is used for clamping the aircraft auxiliary fuel tank, the driving assembly is used for driving the mounting frame to swing up and down, and the driving assembly is also used for driving the profiling bracket to rotate relative to the mounting frame. The seesaw structure formed by the mounting frame and the base can adopt less driving force to realize the large-amplitude swing of the auxiliary oil tank in the axial direction, and the profile modeling bracket clamps the auxiliary oil tank relative to the design of the rotation of the mounting frame, so that the rotation is flexible and labor-saving, and the rotation amplitude is large. The automatic cleaning device is simple in structure, ingenious in design, flexible, reliable and labor-saving in rotation, and can simultaneously realize large-amplitude rotation of the auxiliary oil tank in the axial direction and the circumferential direction.

Description

Automatic cleaning device for auxiliary fuel tank of airplane

Technical Field

The utility model relates to the technical field of aircraft maintenance equipment, in particular to an automatic cleaning device for an auxiliary fuel tank of an aircraft.

Background

The auxiliary fuel tank of the aircraft is a fuel tank with thick middle and streamline two tips hung under the fuselage or the wing. The mounted auxiliary oil tank can obviously increase the range and the cruising and dead time of the aircraft. In a certain working period, aviation fuel in the auxiliary fuel tank can be precipitated at the bottom of the fuel tank or adhered to the inner wall of the fuel tank due to the alternating action of cold air and hot air, and the precipitate inside the fuel tank and adhered to the inner wall needs to be cleaned regularly, so that the pollution is prevented from blocking a fuel circuit or flowing into an engine combustion chamber to cause faults. The auxiliary oil tank is a streamline irregular object with thick middle and two sharp ends, so that the clamping of the auxiliary oil tank is not facilitated; because the fuel oil of the auxiliary fuel tank and the washing gasoline for cleaning the auxiliary fuel tank are inflammable and explosive products, flame or electric spark cannot be generated on the working site; in addition, the oil filling port and the oil discharging port of the auxiliary oil tank are small, a cleaning tool cannot be placed in the auxiliary oil tank, even hands cannot enter the oil filling port, and no proper equipment is available for cleaning the auxiliary oil tank. In the prior art, proper washing gasoline is filled into a secondary oil tank to be cleaned, after the inner wall of the oil tank is immersed for a period of time, a plurality of people respectively lift the tips at the two ends of the secondary oil tank to shake and overturn, and the sinking substances or adherends are washed by the back and forth rolling of the washing gasoline after immersing in the oil tank; the old washing gasoline is discharged, the clean washing gasoline is flushed again, and a plurality of people lift the tips at the two ends of the auxiliary oil tank respectively and shake and overturn back and forth. And repeating the steps for a plurality of times until the inner wall of the oil tank is cleaned, and completing the cleaning work of the interior of the auxiliary oil tank. The cleaning mode depends on the back and forth flowing of the washing gasoline to wash away the stains adhered to the inner wall of the oil tank, and in principle, the larger the shaking and overturning range is, the faster the speed is, and the better the cleaning effect is. However, in the actual situation, the auxiliary oil tank is added with a proper amount of washing gasoline, and a plurality of workers lift the auxiliary oil tank to shake and turn over the auxiliary oil tank, so that a plurality of groups of people are required to work repeatedly and repeatedly due to the limitation of manpower, and the auxiliary oil tank has long working time and is laborious and labor-consuming.

Disclosure of Invention

The utility model aims to solve the technical problems of overcoming the defects of the prior art and providing the automatic cleaning device for the auxiliary fuel tank of the airplane, which has the advantages of ingenious design, simple structure, large shaking and overturning amplitude, high speed, energy conservation and high efficiency.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides an aircraft bellytank self-cleaning device, includes base, mounting bracket, profile modeling bracket and drive assembly, but the mounting bracket uses the base to install on the base as central fulcrum luffing motion, profile modeling bracket's both ends rotationally install the mounting bracket both ends, profile modeling bracket is used for clamping aircraft bellytank, drive assembly is used for driving the mounting bracket luffing motion, drive assembly still is used for driving the relative mounting bracket of profile modeling bracket and rotates.

According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, preferably, the first rotating shaft and the second rotating shaft are respectively arranged at the two ends of the profiling bracket, and the first bearing and the second bearing matched with the first rotating shaft and the second rotating shaft are respectively arranged at the two ends of the mounting frame.

The automatic cleaning device for the auxiliary fuel tank of the aircraft preferably further comprises a limiting transmission seat, wherein the end part of the first rotating shaft extending out of the first bearing is provided with a toothed roller, the limiting transmission seat is provided with a vertical guide rail, and the inner side of the vertical guide rail is provided with a rack meshed with the toothed roller.

In the above automatic cleaning device for an auxiliary fuel tank of an aircraft, preferably, the driving assembly is a pneumatic driving assembly or a hydraulic driving assembly.

In the above automatic cleaning device for an aircraft auxiliary fuel tank, preferably, the pneumatic driving assembly includes a cylinder, a compressed air source and a gas circuit controller, a piston rod is arranged in the cylinder, the upper end of the piston rod is connected with the end of the mounting frame, the cylinder is connected with the compressed air source, and the gas circuit controller is used for controlling the on-off of the compressed air source; the hydraulic driving assembly comprises a hydraulic cylinder, a liquid storage container and an infusion pipeline controller, a piston rod is arranged in the hydraulic cylinder, the upper end of the piston rod is connected with the end of the mounting frame, the hydraulic cylinder is connected with the liquid storage container, and the infusion pipeline controller is used for controlling on-off of an infusion pipeline.

In the above automatic cleaning device for an aircraft auxiliary fuel tank, preferably, the profiling bracket includes a first tip fixing frame, a second tip fixing frame, a first fixing plate, a second fixing plate, an axial positioning assembly, and at least three rods with lengths greater than those of the aircraft auxiliary fuel tank; the two tip fixing frames are respectively sleeved at two ends of the aircraft auxiliary oil tank, the first rotating shaft is fixed at the top of the first tip fixing frame, the rod piece is used for clamping the auxiliary oil tank body from the outer wall of the aircraft auxiliary oil tank, one end of the rod piece is fixed on the first tip fixing frame, the other end of the rod piece is vertically fixed on a first fixing plate and a second fixing plate which are arranged at intervals in parallel, and the second rotating shaft is fixed on the second fixing plate; the axial positioning assembly comprises a movable plate, an adjusting screw and a locking nut, wherein the movable plate vertically penetrates through a rod piece between the second tip fixing frame and the first fixing plate, one end of the adjusting screw penetrates through the first fixing plate to tightly prop against the movable plate at the top end of the second tip fixing frame, the other end of the adjusting screw is provided with a rotary handheld part, and the locking nut is used for locking the relative position of the adjusting screw and the first fixing plate; the contoured bracket further includes at least one locking strap for effecting radial reinforcement of the bellytank body on the contoured bracket.

According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, preferably, the top of the second tip fixing frame is matched with the movable plate through the groove key, and the movable plate is matched with the end part of the adjusting screw through the groove key.

According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, preferably, the top of the second tip fixing frame is provided with the radial positioning shaft, the shaft end of the radial positioning shaft is provided with the external thread, the end part of the adjusting screw is provided with the retractable guide pipe nut, the movable plate is provided with the limiting hole, and the radial positioning shaft penetrates through the limiting hole and is in threaded connection with the retractable guide pipe nut.

According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, preferably, the rod piece is sleeved with the first elastic sheath, and the sleeving parts of the first tip fixing frame, the second tip fixing frame and the two ends of the auxiliary fuel tank of the aircraft are respectively provided with the second elastic sheath.

According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, preferably, the base is provided with the third bearing, and the lower part of the middle part of the mounting frame is provided with the third rotating shaft matched with the third bearing.

In the above automatic cleaning device for an auxiliary fuel tank of an aircraft, preferably, the first bearing, the second bearing or the third bearing is fixed by a split bearing seat.

In the above automatic cleaning device for an auxiliary fuel tank of an aircraft, preferably, the piston rod is sleeved with a booster spring.

In the above automatic cleaning device for an aircraft auxiliary fuel tank, preferably, teeth of the rack are rollers arranged in parallel at intervals.

According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, preferably, the stop blocks are respectively arranged at the upper end and the lower end of the vertical guide rail, and the stop blocks and the vertical guide rail are made of polytetrafluoroethylene materials.

Compared with the prior art, the utility model has the advantages that:

(1) According to the automatic cleaning device for the auxiliary fuel tank of the aircraft, the mounting frame and the base are integrally designed to be of a teeterboard structure, and two ends of the mounting frame can be driven to swing up and down in an arc mode by taking the center as a pivot. The auxiliary fuel tank of the aircraft is rotatably clamped in the mounting frame through the profiling bracket, and the driving assembly drives the mounting frame to swing up and down and simultaneously drives the auxiliary fuel tank body to rotate, so that the auxiliary fuel tank of the aircraft can move in the circumferential direction and the axial direction simultaneously. The seesaw structure formed by the mounting frame and the base can adopt less driving force to realize the large-amplitude swing of the auxiliary oil tank in the axial direction, and the profile modeling bracket clamps the auxiliary oil tank relative to the design of the rotation of the mounting frame, so that the whole mounting frame and the auxiliary oil tank synchronously rotate, the rotation is flexible and labor-saving, and the rotation amplitude is large. The cleaning device disclosed by the utility model is simple in structure, ingenious in design, flexible in rotation, safe, reliable, labor-saving and energy-saving, not only is the labor cost greatly reduced, but also the energy consumption of the required driving force is lower, and the axial and circumferential large-scale rotation of the auxiliary fuel tank can be realized at the same time, so that the cleaning force is improved, the cleaning effect is improved, and the automatic cleaning of the auxiliary fuel tank of an aircraft is realized.

(2) The automatic cleaning device provided by the utility model realizes linkage driving of the mounting frame and the profiling bracket by matching the toothed roller at the shaft end of the profiling bracket with the limit transmission seat with the toothed guide rail, and only the mounting frame is driven to swing up and down by taking the base as a support, the profiling bracket can be driven to rotate clockwise and anticlockwise by matching the toothed roller with the toothed guide rail, and further the auxiliary fuel tank of an airplane is driven to rotate clockwise and anticlockwise, so that the linkage driving of the automatic cleaning device is realized, and two actions of axial swinging and circumferential rotation of the auxiliary fuel tank of the airplane can be realized by one driving force, so that the whole structure is simpler, and the energy consumption is saved. The limiting transmission seat not only has a transmission function, so that the profiling bracket rotates relative to the mounting frame, but also has a limiting function, and as the first rotating shaft at the end part of the profiling bracket always moves up and down in the vertical guide rail in the limiting transmission seat, the up-and-down swing track of the profiling bracket is ensured not to deviate, and the up-and-down swing track and amplitude of the mounting frame can be well limited.

(3) Because the fuel oil of the auxiliary fuel tank of the aircraft and the washing gasoline used for cleaning the auxiliary fuel tank are inflammable and explosive products, flame or electric spark cannot be generated on the working site, the automatic cleaning device provided by the utility model provides driving force by the pneumatic driving component or the hydraulic driving component, the two driving modes are suitable for long-distance driving, and the on-off controller of the compressed air source or the hydraulic oil can be arranged far away from the automatic cleaning device, so that the hidden danger that spark can be generated by taking the motor as power is avoided.

(4) The profiling bracket is designed to imitate the appearance of the auxiliary fuel tank of the aircraft, has good structural fit to the auxiliary fuel tank and small occupied space, and provides sufficient space for clamping the auxiliary fuel tank of the aircraft to rotate relative to the mounting frame. Because the aircraft auxiliary oil tank is a streamline irregular body with thick middle and two sharp ends, the clamping is difficult to stabilize, and in actual work, certain size difference exists even if the aircraft auxiliary oil tank with the same model, for example, the difference of axial sizes is from a few centimeters to tens of centimeters. The two tip fixing frames, the plurality of rod pieces and the locking binding bands of the profiling bracket are matched to realize stable clamping, wherein the rod pieces have certain bending toughness and can accommodate radial errors of the auxiliary fuel tank, and the movable plate, the adjusting screw and the locking nuts can be flexibly adjusted to axially position according to the length of the auxiliary fuel tank. The first fixed plate and the second fixed plate can better keep the distance between the plurality of rod pieces penetrating through the first fixed plate and the second fixed plate, so that the movable plate can be flexibly pushed on the rod pieces when being axially positioned.

Drawings

Fig. 1 is a schematic view of an automatic cleaning device for an auxiliary fuel tank of an aircraft according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of an automatic cleaning device for an auxiliary fuel tank of an aircraft according to an embodiment of the present utility model.

Fig. 3 is an enlarged partial schematic view at a in fig. 2.

Fig. 4 is a front view and a cross-sectional view taken along line A-A of a limit drive socket in accordance with an embodiment of the present utility model.

Fig. 5 is a schematic view showing the structure of the contracted state and the extended state of the cylinder in the embodiment of the present utility model.

Fig. 6 is a schematic structural view of a profiling bracket in an automatic cleaning device for an aircraft auxiliary fuel tank according to an embodiment of the utility model.

Fig. 7 is an enlarged partial schematic view of a contoured bracket in an automatic cleaning device for an aircraft auxiliary fuel tank in accordance with an embodiment of the present utility model.

Fig. 8 is a schematic structural view of an aircraft auxiliary fuel tank in an embodiment of the utility model.

Fig. 9 is a schematic view showing an assembly structure of an adjusting screw and a locking flange in an embodiment of the present utility model.

Fig. 10 is a schematic view of a second tip holder according to an embodiment of the present utility model.

Fig. 11 is a schematic structural view of a first tip holder according to an embodiment of the present utility model.

Fig. 12 is a schematic view of a split bearing housing in accordance with an embodiment of the present utility model.

Fig. 13 is a cross-sectional view of a rubber boot on a tip holder in an embodiment of the utility model.

Legend description: 1. a base; 11. a third bearing; 12. a third rotating shaft; 2. a mounting frame; 3. a profiling bracket; 31. a first rotating shaft; 32. a second rotating shaft; 33. a first bearing; 34. a second bearing; 35. a first tip holder; 351. an end plate; 3511. an upper end plate; 3512. a lower end plate; 352. a connecting column; 353. conical through holes; 36. a second tip holder; 361. a first radial positioning groove; 362. a second radial positioning groove; 37. a first fixing plate; 38. a second fixing plate; 39. an axial positioning assembly; 391. a movable plate; 392. adjusting a screw; 393. a lock nut; 394. rotating the hand-held portion; 395. a locking flange; 3951. a locking handle; 396. a collapsible conduit nut; 310. a rod piece; 311. locking the binding band; 3101. a first elastic sheath; 3102. a second elastic sheath; 4. a pneumatic drive assembly; 41. a cylinder; 42. a piston rod; 421. a booster spring; 5. a limit transmission seat; 51. a vertical guide rail; 511. a stop block; 6. a toothed roller; 7. rack 8, aircraft bellytank.

Detailed Description

The utility model is described in further detail below with reference to the drawings and specific examples of the specification.

As shown in fig. 1 to 13, the cleaning device for an aircraft auxiliary fuel tank of the present embodiment includes a base 1, a mounting frame 2, a profiling bracket 3 and a driving assembly, wherein the mounting frame 2 is mounted on the base 1 in a manner of swinging up and down by taking the base 1 as a central pivot, two ends of the profiling bracket 3 are rotatably mounted at two ends of the mounting frame 2, the profiling bracket 3 is used for clamping an aircraft auxiliary fuel tank 8, the driving assembly is used for driving the mounting frame 2 to swing up and down, and the driving assembly is also used for driving the profiling bracket 3 to rotate relative to the mounting frame 2. The profile modeling bracket 3 is imitative and laminating aircraft bellytank 8's appearance design, and mounting bracket 2 also designs according to aircraft bellytank 8's structure, designs to the middle low two high whole structure that is the U type, uses mounting bracket 2 length direction's middle part to install mounting bracket 2 on base 1 as the installation site, makes mounting bracket 2 and base 1 wholly be the teeterboard structure, and mounting bracket 2 both ends use the center to be the fulcrum about one, drive aircraft bellytank 8 and use the junction of base 1 of center to be the circular arc swing about the centre of a circle, and base 1 at center is fixed on ground base. The auxiliary fuel tank 8 of the aircraft is rotatably clamped in the mounting frame 2 through the profiling bracket 3, and the driving assembly drives the mounting frame 2 to swing up and down and simultaneously drives the fuel tank body to rotate, so that the auxiliary fuel tank 8 of the aircraft can move in the circumferential direction and the axial direction simultaneously, and the driving assembly can be driven respectively or in a linkage driving mode. The teeterboard structure formed by the mounting frame 2 and the base 1 can adopt less driving force to realize the large-amplitude swing of the auxiliary fuel tank in the axial direction, and the profile modeling bracket 3 clamps the auxiliary fuel tank relative to the design of the rotation of the mounting frame 2, so that the whole mounting frame 2 and the auxiliary fuel tank synchronously rotate, and the teeterboard structure is flexible and labor-saving in rotation, large in rotation amplitude and high in speed. The cleaning device of this embodiment simple structure, design benefit rotates nimble, reliable laborsaving, and can realize simultaneously that oil tank axial and circumference are by a wide margin, quick rotation.

The cleaning method of the automatic cleaning device for the auxiliary fuel tank of the airplane based on the embodiment comprises the following steps:

s1, clamping an aircraft auxiliary fuel tank 8 to be cleaned on a profiling bracket 3, and rotatably mounting the profiling bracket 3 on a mounting frame 2;

s2, injecting cleaning liquid into the auxiliary fuel tank 8 of the aircraft;

s3, starting a driving assembly, driving the mounting frame 2 to swing up and down by taking the base 1 as a fulcrum, and simultaneously driving the profiling bracket 3 to rotate relative to the mounting frame 2, so as to simultaneously drive the cleaning liquid to move axially and circumferentially in the auxiliary fuel tank 8 of the aircraft;

and S4, after the cleaning is finished, the cleaning fluid in the auxiliary fuel tank 8 of the aircraft is emptied.

In this embodiment, the two ends of the profiling bracket 3 are respectively provided with a first rotating shaft 31 and a second rotating shaft 32, and the two ends of the mounting frame 2 are respectively provided with a first bearing 33 and a second bearing 34 which are matched with the first rotating shaft 31 and the second rotating shaft 32. Of course, in other embodiments, other rotational connections, such as articulation via pins, may be used, but the flexibility and reliability of rotation is not as good as the connection of the shaft to the bearing of the present embodiment.

In this embodiment, the device further includes a limit transmission seat 5, the end portion of the first rotating shaft 31 extending out of the first bearing 33 is provided with a toothed roller 6, the toothed roller 6 is a roller with arc-shaped external teeth, a vertical guide rail 51 is arranged on the limit transmission seat 5, and a rack 7 meshed with the toothed roller 6 is arranged on the inner side of the vertical guide rail 51. The driving assembly of the embodiment drives the mounting frame 2 to swing up and down by taking the base 1 as a pivot through linkage design, and drives the toothed roller 6 at the end part of the first rotating shaft 31 on the profiling bracket 3 to roll up and down along the vertical guide rail 51 when the mounting frame 2 swings up and down, so as to drive the oil tank to turn clockwise and anticlockwise, so that the cleaning liquid can do large-amplitude axial movement and circumferential movement in the auxiliary oil tank 8 of the aircraft. The limiting transmission seat 5 not only has a transmission function, so that the profiling bracket 3 rotates relative to the mounting frame 2, but also has a limiting function, and as the first rotating shaft 31 at the end part of the profiling bracket 3 always moves up and down in the vertical guide rail 51 in the limiting transmission seat 5, the up and down swinging track of the profiling bracket 3 is ensured not to deviate, and the up and down swinging track and amplitude of the mounting frame 2 can be well limited. The vertical guide rail 51 is an arc guide rail, and is adapted to the up-and-down swing track of the toothed roller 6.

As shown in fig. 3 and 4, in this embodiment, teeth of the rack 7 are rollers uniformly arranged at parallel intervals, each roller gap is meshed with a tooth of the toothed roller 6, specifically, a channel is provided on an inner side of the vertical guide rail 51, mounting holes are uniformly provided on the channel, the rollers are rotatably (autorotatively) mounted in the mounting holes, and rotation of the toothed roller 6 meshed with the rollers drives the profiling bracket 3 to alternately rotate clockwise and counterclockwise. The static friction is changed into dynamic friction by adopting the arrangement of the rack 7 with the roller, so that the toothed roller 6 is more flexibly and smoothly matched with the rack 7.

Further preferably, the toothed roller 6 is coupled to the first shaft 31 by means of an expanding coupling sleeve. The expansion sleeve connection makes the manufacture and installation of the parts simpler than the common interference connection and the keyed connection. Machining of the shaft and bore mounting the expansion shell does not require high precision manufacturing tolerances as does interference fit. The expansion sleeve is installed without heating, cooling or pressurizing equipment, and only the bolts are required to be screwed according to the required moment. And the adjustment is convenient, and the hub can be conveniently adjusted to a required position on the shaft. The expansion sleeve has long service life and high strength. The expansion sleeve is driven by friction, so that the expansion sleeve is not weakened by key grooves of the connected pieces, does not move relatively, and cannot wear in working. When the expansion sleeve is overloaded, the connection effect is lost, and the equipment can be protected from damage. The expansion sleeve is convenient to detach and has good interchangeability. Because the expansion sleeve can combine the hubs with larger fit clearance, the bolts are unscrewed during disassembly, and the connected piece can be easily disassembled. When in expansion, the contact surface is tightly attached, so that rust is not easy to generate, and the connection and the disassembly are convenient.

In this embodiment, the driving assembly adopts the pneumatic driving assembly 41 or the hydraulic driving assembly, and since the fuel oil of the auxiliary fuel tank and the washing gasoline for cleaning the auxiliary fuel tank are inflammable and explosive products, flame or electric spark cannot be generated at the working site, both driving modes are suitable for remote driving, and the on-off controller of the control component needing electricity such as a compressed air source or hydraulic oil can not be installed at the site, and the hidden danger that spark may be generated by taking the motor as power can be avoided.

Further preferably, the driving assembly of the embodiment adopts an air pressure driving assembly 41, and comprises an air cylinder 41, a compressed air source and an air circuit controller (not shown in the figure), a piston rod 42 is arranged in the air cylinder 41, the upper end of the piston rod 42 is connected with the end part of the mounting frame 2, the air cylinder 41 is connected with the compressed air source, and the air circuit controller is used for controlling the on-off of the compressed air source. The air circuit controller controls the on-off of the compressed air to enable the piston rod 42 in the air cylinder 41 to extend and retract, and drives the mounting frame 2 to swing in an up-down circular arc. The pneumatic driving device is simple in structure, clean, sensitive in action and has a buffering function.

In this embodiment, as shown in fig. 5, the piston rod 42 is sleeved with the assist spring 421, when the cylinder 41 is extended, the assist spring 421 is extended, the response start speed of the extension of the cylinder 41 can be increased by the assist spring 421, and the piston rod 42 in the assist cylinder 41 extends outwards. When the cylinder 41 is contracted, the assisting spring 421 can reduce downward movement of the cleaning liquid in the auxiliary oil tank, and buffer the impact force of the cleaning liquid increasing downward due to gravity, so that the whole mechanism moves more stably. The design ensures that the cylinder piston is uniformly stressed, and the service lives of the cylinder piston and the lip rubber ring are prolonged.

Of course, in other embodiments, the driving assembly may also adopt a hydraulic driving assembly, including a hydraulic cylinder, a liquid storage container and a transfusion pipeline controller, a piston rod 42 is disposed in the hydraulic cylinder, the upper end of the piston rod 42 is connected with the end of the mounting frame 2, the hydraulic cylinder is connected with the liquid storage container, and the transfusion pipeline controller is used for controlling on-off of the transfusion pipeline. However, a liquid storage container needs to be additionally arranged, liquid leakage is easy to occur, and the reaction is not as rapid and flexible as pneumatic driving.

As shown in fig. 6 and 7, in this embodiment, the profiling frame includes a first tip holder 35, a second tip holder 36, a first fixing plate 37, a second fixing plate 38, an axial positioning assembly 39, and at least three rods 310 having a length greater than that of the auxiliary fuel tank 8 of the aircraft; the two tip fixing frames are respectively sleeved at two ends of the aircraft auxiliary fuel tank 8, the first rotating shaft 31 is fixed at the top of the first tip fixing frame 35, the rod piece 310 is used for clamping the fuel tank body from the outer wall of the aircraft auxiliary fuel tank 8, one end of the rod piece 310 is fixed on the first tip fixing frame 35, the other end of the rod piece 310 is vertically fixed on a first fixing plate 37 and a second fixing plate 38 which are arranged at intervals in parallel, and the second rotating shaft 32 is fixed on the second fixing plate 38; the axial positioning assembly 39 comprises a movable plate 391, an adjusting screw rod 392 and a locking nut 393, wherein the movable plate 391 is vertically arranged on a rod piece 310 which is arranged between the second tip fixing frame 36 and the first fixing plate 37 in a penetrating way, one end of the adjusting screw rod 392 passes through the first fixing plate 37 to tightly support the movable plate 391 on the top end of the second tip fixing frame 36, a rotary hand-held part 394 such as a rotary hand wheel or a rotary handle is arranged at the other end of the adjusting screw rod 392, and the locking nut 393 is positioned at the position where the adjusting screw rod 392 passes out of the first fixing plate 37 and is used for locking the relative position of the adjusting screw rod 392 and the first fixing plate 37; the profiling bracket 3 further comprises two locking straps 311, the locking straps 311 are used for realizing radial fixation of the auxiliary fuel tank body on the profiling bracket 3, and the locking straps 311 are cotton soft straps. The profiling bracket 3 is designed to imitate the appearance of the auxiliary fuel tank 8 of the aircraft, has good structural fit to the auxiliary fuel tank and small occupied space, and provides more space for clamping the auxiliary fuel tank 8 of the aircraft to rotate relative to the mounting frame 2. As shown in fig. 8, since the aircraft bellytank 8 is a streamlined irregular body with thick middle and sharp ends, it is difficult to stably clamp, and in actual operation, even the aircraft bellytank 8 of the same model has a certain dimensional difference, such as a difference in axial dimension ranging from several centimeters to tens of centimeters. The two tip fixing frames in the profiling bracket 3 of the embodiment are matched with the plurality of rod pieces 310 to realize stable clamping, wherein the rod pieces 310 have certain bending toughness and can accommodate radial errors of the auxiliary fuel tank, and the movable plate 391, the adjusting screw 392 and the locking nut 393 can be flexibly adjusted to axially position according to the length of the auxiliary fuel tank. The first fixing plate 37 and the second fixing plate 38 are used for keeping the structure of the profiling bracket, and can better keep the interval between the plurality of rod pieces 310 penetrating through the profiling bracket, so that the movable plate 391 can be flexibly pushed on the rod pieces 310 when being axially positioned, and copper bushings are further arranged at the positions of the rod pieces 310 penetrating through the through holes of the movable plate 391 for reducing friction.

Further preferably, as shown in fig. 7 and 9, a lockable locking flange 395 is provided at the position where the adjusting screw 392 penetrates the first fixing plate 37, for further locking the relative position of the adjusting screw 392 to the first fixing plate 37 after the adjusting screw 392 is adjusted, and a locking handle 3951 is provided on the locking flange 395. When the auxiliary oil tank is in operation, the auxiliary oil tank is placed in the profiling bracket 3, the rotary hand wheel is rotated to enable the adjusting screw 392 to be abutted against the movable plate 391, the movable plate 391 is abutted against the second tip fixing frame 36, the locking handle 3951 on the locking flange 395 is rotated at the moment, the locking nut 393 on the back face is screwed, and the auxiliary oil tank is positioned and clamped in the axial direction. The rod piece 310 adopts a steel pipe, and the first fixing plate 37 and the second fixing plate 38 are fixed with the steel pipe through welding, so that the integral structural strength is ensured.

In this embodiment, the top of the second tip holder 36 is engaged with the movable plate 391 through a slot key for realizing radial positioning and radial limitation of the second tip holder 36 and the movable plate 391, and the movable plate 391 is engaged with the end of the adjusting screw 392 through a slot key for realizing radial positioning and radial limitation of the movable plate 391 and the adjusting screw 392.

Specifically, the top of the second tip holder 36 is provided with a first radial positioning groove 361, one surface of the movable plate 391 is provided with a positioning key (not shown in the figure) in nested fit with the first radial positioning groove 361, and the other surface of the movable plate 391 is provided with a second radial positioning groove 362 in fit with the end of the adjusting screw 392. Through first radial constant head tank 361 and setting element, adjusting screw 392 tip and the cooperation of second radial constant head tank 362 are used, are favorable to fly leaf 391, adjusting screw 392 cooperation locking second pointed end mount 36's quick location when bellytank clamping to radial limiting displacement has. Of course, in other embodiments, the position of the slot key can be changed, so long as the radial positioning and limiting effect of the second tip holder 36, the movable plate 391 and the adjusting screw 392 can be achieved.

Further preferably, as shown in fig. 9 and 10, a radial positioning shaft 363 is arranged at the top of the second tip fixing frame 36, an external thread is arranged at the shaft end of the radial positioning shaft 363, a collapsible conduit nut 396 is arranged at the end of the adjusting screw 392, a limiting hole is formed in the movable plate 391, and the radial positioning shaft 363 is connected with the collapsible conduit nut 396 through the limiting hole in a threaded manner. The adjustable pipe nut 396 is pressed onto the adjusting screw rod 392 through the punch, the adjusting screw rod 392 can not be taken out after the annular pressing at the joint of the adjustable pipe nut 396 and the adjusting screw rod 392, the axial positions of the adjusting screw rod 392 and the adjustable pipe nut 396 are limited, but the adjusting screw rod 392 can still freely rotate along the circumferential direction, and compared with the groove key matching mode, the radial positioning limiting structure of the design is more simple, firm and reliable. As shown in fig. 11, in this embodiment, the first tip holder 35 includes two end plates 351 arranged in parallel and a plurality of connecting posts 352, the plurality of connecting posts 352 are connected between the two end plates 351 along edges of the end plates 351, the end plates 351 include an upper end plate 3511 and a lower end plate 3512, the lower end plate 3512 is provided with a conical through hole 353 for inserting a tip of an aircraft auxiliary fuel tank 8, the second elastic sheath 3102 is disposed on the conical through hole 353, and the end plates 351 are circular end plates. The second tip holder 36 is substantially identical in structure to the first tip holder 35, with the main difference being that the shaft end at the top of the second tip holder 36 is provided with external threads.

In this embodiment, a third bearing 11 is disposed on the base 1, and a third rotating shaft 12 matched with the third bearing 11 is disposed below the middle portion of the mounting frame 2. The shaft is connected with the bearing, so that the bearing is firmer, and the rotation is more flexible.

In the present embodiment, the first bearing 33, the second bearing 34, and the third bearing 11 are fixed by split bearing blocks (as shown in fig. 12). The split bearing seat is convenient to install and detach, and particularly when the profiling bracket 3 of the auxiliary oil tank with the volume of about 1500-2000 liters and the length of about 5-6 meters is hoisted on the mounting frame 2 with a certain height, the split bearing seat is adopted, so that the loading and unloading are more convenient and quicker.

In this embodiment, the rod 310 is sleeved with a first elastic sheath 3101, such as a sponge sheath; the inner conical surfaces of the sleeving parts of the first tip fixing frame 35, the second tip fixing frame 36 and the two ends of the auxiliary fuel tank 8 of the airplane are respectively provided with a second elastic sheath 3102, such as a rubber sheath, the shape of which imitates the tip of the auxiliary fuel tank, as shown in fig. 13. Therefore, the auxiliary oil tank is protected by the soft object in an omnibearing manner and cannot be scratched, the auxiliary oil tank is usually made of aluminum, the auxiliary oil tank is limited in bearing of external force, and the auxiliary oil tank can be prevented from deforming by adopting the soft object in the omnibearing manner.

In this embodiment, the upper and lower ends of the vertical guide rail 51 are respectively provided with a stopper 511, and the stopper 511 plays a limiting role when the system fails. The stop block 511 and the vertical guide rail 51 are made of polytetrafluoroethylene materials, so that the system is wear-resistant and elastic, and the reliability of the system is guaranteed.

The cleaning method based on the automatic cleaning device for the auxiliary fuel tank of the airplane comprises the following steps of;

s1, clamping an aircraft auxiliary fuel tank 8 to be cleaned on a profiling bracket 3, and rotatably mounting the profiling bracket 3 on a mounting frame 2;

s2, injecting cleaning liquid into the auxiliary fuel tank 8 of the aircraft;

s3, starting a driving assembly, driving the mounting frame 2 to swing up and down by taking the base 1 as a fulcrum, and driving the toothed idler wheels 6 at the end parts of the first rotating shafts 31 to roll up and down along the vertical guide rails 51 when the mounting frame 2 swings up and down, so as to drive the profiling bracket 3 to alternately rotate clockwise and anticlockwise, so that the cleaning liquid simultaneously moves axially and circumferentially in the auxiliary fuel tank 8 of the aircraft;

and S4, after the cleaning is finished, the cleaning fluid in the auxiliary fuel tank 8 of the aircraft is emptied.

The cleaning method of the embodiment is based on the automatic cleaning device, so that the automatic and efficient cleaning of the auxiliary fuel tank 8 of the aircraft can be realized, the cleaning effect is ensured, the labor cost is saved, and more importantly, the cleaning method is safe, reliable and energy-saving.

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims (10)

1. An aircraft bellytank self-cleaning device, its characterized in that: including base (1), mounting bracket (2), profile modeling bracket (3) and drive assembly, but mounting bracket (2) use base (1) as central fulcrum and install on base (1) with the luffing motion, install rotationally at the both ends of profile modeling bracket (3) mounting bracket (2) both ends, profile modeling bracket (3) are used for clamping aircraft bellytank (8), drive assembly is used for driving mounting bracket (2) luffing motion, drive assembly still is used for driving profile modeling bracket (3) relative mounting bracket (2) rotation.

2. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 1, wherein: the two ends of the profiling bracket (3) are respectively provided with a first rotating shaft (31) and a second rotating shaft (32), and two ends of the mounting frame (2) are respectively provided with a first bearing (33) and a second bearing (34) which are matched with the first rotating shaft (31) and the second rotating shaft (32).

3. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 2, wherein: still include spacing transmission seat (5), the tip that first pivot (31) stretched out first bearing (33) is equipped with toothed roller (6), be equipped with vertical guide rail (51) on spacing transmission seat (5), vertical guide rail (51) inboard be equipped with toothed roller (6) engaged rack (7).

4. An aircraft auxiliary fuel tank automatic cleaning device according to claim 3, wherein: the driving component adopts an air pressure driving component (4) or a hydraulic driving component.

5. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 4, wherein: the pneumatic driving assembly (4) comprises an air cylinder (41), a compressed air source and an air circuit controller, a piston rod (42) is arranged in the air cylinder (41), the upper end of the piston rod (42) is connected with the end part of the mounting frame (2), the air cylinder (41) is connected with the compressed air source, and the air circuit controller is used for controlling the on-off of the compressed air source; the hydraulic driving assembly comprises a hydraulic cylinder, a liquid storage container and an infusion pipeline controller, a piston rod (42) is arranged in the hydraulic cylinder, the upper end of the piston rod (42) is connected with the end of the mounting frame (2), the hydraulic cylinder is connected with the liquid storage container, and the infusion pipeline controller is used for controlling the on-off of an infusion pipeline.

6. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 2, wherein: the profiling bracket (3) comprises a first tip fixing frame (35), a second tip fixing frame (36), a first fixing plate (37), a second fixing plate (38), an axial positioning assembly (39) and at least three rod pieces (310) with lengths larger than that of an aircraft auxiliary fuel tank (8); the two tip fixing frames are respectively sleeved at two ends of the aircraft auxiliary oil tank (8), the first rotating shaft (31) is fixed at the top of the first tip fixing frame (35), the rod piece (310) is used for clamping the auxiliary oil tank body from the outer wall of the aircraft auxiliary oil tank (8), one end of the rod piece (310) is fixed on the first tip fixing frame (35), the other end of the rod piece (310) is vertically fixed on a first fixing plate (37) and a second fixing plate (38) which are arranged at parallel intervals, and the second rotating shaft (32) is fixed on the second fixing plate (38); the axial positioning assembly (39) comprises a movable plate (391), an adjusting screw (392) and a locking nut (393), wherein the movable plate (391) is vertically arranged on a rod piece (310) between a second tip fixing frame (36) and a first fixing plate (37) in a penetrating mode, one end of the adjusting screw (392) penetrates through the first fixing plate (37) to tightly prop the movable plate (391) on the top end of the second tip fixing frame (36), a rotary handheld part (394) is arranged at the other end of the adjusting screw (392), and the locking nut (393) is used for locking the relative position of the adjusting screw (392) and the first fixing plate (37); the profiling bracket (3) further comprises at least one locking strap (311), and the locking strap (311) is used for realizing radial reinforcement of the auxiliary fuel tank body on the profiling bracket (3).

7. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 6, wherein: the top of the second tip fixing frame (36) is matched with the movable plate (391) through a groove key, and the movable plate (391) is matched with the end part of the adjusting screw rod (392) through a groove key;

or, second pointed end mount (36) top is equipped with radial location axle (363), the axle head of radial location axle (363) is equipped with the external screw thread, but adjusting screw (392) tip is equipped with receipts pressure pipe nut (396), set up spacing hole on fly leaf (391), radial location axle (363) pass behind the spacing hole with but receipts pressure pipe nut (396) threaded connection.

8. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 6, wherein: the rod piece (310) is sleeved with a first elastic sheath (3101), and second elastic sheaths (3102) are respectively arranged at the sleeved positions of the two ends of the first tip fixing frame (35), the second tip fixing frame (36) and the auxiliary fuel tank (8) of the aircraft.

9. The automatic cleaning device for an aircraft auxiliary fuel tank according to any one of claims 2 to 8, characterized in that: a third bearing (11) is arranged on the base (1), and a third rotating shaft (12) matched with the third bearing (11) is arranged below the middle part of the mounting frame (2); the first bearing (33), the second bearing (34) or the third bearing (11) is fixed through a split bearing seat.

10. The automatic cleaning device for an aircraft auxiliary fuel tank according to claim 5, wherein: the teeth of the rack (7) are rollers arranged at intervals in parallel; and the piston rod (42) is sleeved with a booster spring (421).