CN112723216A - Jacking system and jacking method for aircraft - Google Patents
Jacking system and jacking method for aircraft Download PDFInfo
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- CN112723216A CN112723216A CN202110036909.2A CN202110036909A CN112723216A CN 112723216 A CN112723216 A CN 112723216A CN 202110036909 A CN202110036909 A CN 202110036909A CN 112723216 A CN112723216 A CN 112723216A
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- jacking
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- oil cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/247—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated pneumatically actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/35—Inflatable flexible elements, e.g. bellows
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention belongs to the field of aircraft rescue, relates to jacking equipment for an aircraft, and particularly relates to a jacking system and a jacking method for the aircraft. The automatic adapter lifting device comprises an oil cylinder, wherein an adapter is installed at the lifting end of the oil cylinder, the oil cylinder can control the adapter to move up and down, a jacking device is installed below the oil cylinder, and the jacking device is used for enabling the oil cylinder and the adapter to move up and down synchronously and adjusting the axis angle of the adapter in the horizontal direction. The lower tip of hydro-cylinder is installed in a mount pad, and a plurality of otic placodes are installed to this mount pad outside even interval, the installation of the tip and the jacking device that the mount pad was kept away from to the otic placode is fixed. The jacking device comprises a height adjusting assembly and an angle adjusting assembly, wherein the height adjusting assembly is used for adjusting the horizontal height of the oil cylinder, and the angle adjusting assembly is used for adjusting the horizontal inward angle of the adapter.
Description
Technical Field
The invention belongs to the field of aircraft rescue, and relates to jacking equipment for an aircraft, in particular to a jacking system and a jacking method for the aircraft.
Background
A jack is a jacking apparatus based on a rigid jacking member, and is widely used in various fields. Taking the implementation mode of the method in the field of aircraft rescue as an example, the method can be applied to a plurality of working processes such as aircraft maintenance, maintenance and equipment replacement.
At present, jacking equipment for aircrafts mostly adopts a traditional column type hydraulic jack, and the structure of the jack mainly comprises an oil cylinder and an adapter matched with a machine type. The jack has small volume and large load and can be widely applied to most machine types. In the practical use process, because the adjustable stroke of the jack is limited, a corresponding base is generally required to be configured to increase the jacking stroke of the jack. The practical use of the device is shown in patent numbers 201201945103, 2017204340641 and 2015105243625. The base that above-mentioned publication shows adopts the structure of tripod or class tripod mostly, fixes traditional column type pneumatic cylinder in the upper end position of base, in the use, adopts the base as large-scale adjustment benchmark earlier, treats that the post type pneumatic cylinder removes to the regulation stroke of aircraft below in back, and rethread column type pneumatic cylinder carries out the jacking.
However, the jacking devices with the above structures all have certain problems. Firstly, the height adjustment in the vertical direction is not flexible enough, and the maximum height of each base in the unfolding state limits the jacking height limit of the jacking device because the height of each base is limited. Because the model of each aircraft is different, the interval between its jacking position and the ground is unset, and the high limit of the base that the above-mentioned patent disclosed all is fixed, can not carry out extensive adjustment, when the interval between aircraft and the ground is too high or low, this type jacking device all can't normal use. Secondly, the structure of the jacking device has high requirements on the ground at the jacking position, namely the triangular structure at the bottom of the base is basically in a horizontal state to be normally used. If the ground is soft basic planes such as soil, grassland and the like, the bottom of the jacking device is not fixed stably enough, and great dumping risk exists. Thirdly, the jacking angle of the hydraulic cylinder of the jacking device with the structure can not be adjusted, and the hydraulic cylinder can only be displaced in the vertical direction. Because the jacking device is arranged below the jacking position of the aircraft, the horizontal position of the hydraulic cylinder cannot be ensured to be just below the orthographic projection position of the jacking position when the jacking device is at the low position. When jacking device expanded to high-order position, then there was the condition of deviation in the pneumatic cylinder and the aircraft jacking position likely to appear, at this moment, can only transfer jacking device to low level position again, then wholly with its whole translation jacking once more. The operation of the process is high in requirement and difficulty, and the process may need to be repeatedly adjusted for several times.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the jacking system for the aircraft, which is flexible in structure, wide in adaptability, stable in jacking and adjustable in jacking angle.
The technical scheme adopted by the invention is as follows:
the utility model provides a jacking system for aircraft, includes a hydro-cylinder, an adapter is installed to the lift end of hydro-cylinder, and displacement, its characterized in that about the steerable adapter of this hydro-cylinder takes place: and a jacking device is arranged below the oil cylinder and used for synchronously moving the oil cylinder and the adapter up and down and adjusting the axis angle of the adapter in the horizontal direction.
Furthermore, the lower tip of hydro-cylinder is installed in a mount pad, and a plurality of otic placodes are installed to this mount pad outside even interval, the installation of the tip and the jacking device that the mount pad is kept away from to the otic placode is fixed.
Further, jacking device includes height control subassembly and angle adjusting part, and wherein height control subassembly is used for the level of adjustment hydro-cylinder, and angle adjusting part is used for adjusting the inside angle of adapter horizontal direction.
Furthermore, the height adjusting assembly and the angle adjusting assembly are air bags, the air bags are stacked longitudinally, the angle adjusting assembly is positioned on the bottom layer, and the air bags positioned on the bottom layer are height adjusting assemblies.
Furthermore, the air bags are arranged in groups, each group comprises a plurality of air bags, and the air bags in the same group are uniformly arranged at intervals along the horizontal direction to form an air bag layer.
Furthermore, the height adjusting assembly further comprises a plurality of connecting flanges, the lower end part and the upper end part of each air bag are respectively provided with one connecting flange, each connecting flange is arranged along the horizontal direction, and the connecting flanges are parallel to each other.
Furthermore, a plurality of connecting rods are hinged between adjacent connecting flanges in the vertical direction, and the connecting rods are uniformly arranged at the outer edge of the connecting flanges at intervals.
Furthermore, the adjacent connecting flanges in the horizontal direction are integrally connected by adopting a cross beam.
The jacking method based on the jacking system comprises the following steps:
the lifting and lowering of which comprises the following steps,
step 1: when the height of the jacking system which is fixedly installed is more than 800mm from the jacking fulcrum of the aircraft, the top airbag is synchronously inflated to 0.4MPA, so that the top airbag is lifted to a state that the connecting rod has tension;
step 2: inflating four air bags in the air bag layer of the bottom layer to the height of about 300mm, wherein no external load exists at the moment, the actual inflation pressure is less than 0.1MPa only under the condition of self weight, and if the initial height is less than 800mm, the first step can be skipped, and the second step is directly operated;
and step 3: lifting or lowering the four air bags in the air bag layer at the bottom layer, wherein the air bag layer can rotate, simultaneously lifting the oil cylinder to enable the spherical surface to be matched with a ball socket of the aircraft, continuously lifting the oil cylinder until the safety valve is automatically opened, and keeping the oil cylinder static after the safety valve is opened, namely stopping lifting;
and 4, step 4: the 4 air bags at the bottom layer have independent inflation, deflation and intercommunication functions, after the step 3, the intercommunication function between the first layers is opened, the air bag layer at the bottom layer is raised, the pressure of the air bag layer reaches 1MPa, and the aircraft starts to be jacked; in this way, the air bag layer of each layer is lifted to 1MPa in sequence until the rescue height requirement is met;
and 5: and in the descending process, keeping the opening state of the bottom layer air bag intercommunication function and the opening state of the oil cylinder safety valve, firstly deflating the air bag layer of the secondary bottom layer, deflating layer by layer until reaching the top layer, closing the oil cylinder safety valve, falling back the oil cylinder, and finally deflating the bottom layer air bag to finish the retraction.
The invention has the advantages and positive effects that:
1. in the invention, the oil cylinder in the existing device is kept to be matched with the adapter to serve as a terminal for outputting the jacking force, the jacking device is adopted to replace the original tripod mechanism, the axial angle adjusting capability in a certain range is configured on the basis of ensuring that the oil cylinder and the adapter can synchronously lift, and the problem that the jacking angle in the prior art is not adjustable is solved.
2. According to the invention, the oil cylinder is fixed in the mounting seat, the fixing mode adopts spherical surface contact, the jacking process of the aircraft approximately rotates with a fixed point, and the spherical surface contact ensures that the oil cylinder is not subjected to radial force during jacking; and a plurality of lug plates are arranged outside the oil cylinder for fixing, namely the reaction force of the jacking of the oil cylinder is dispersed. The lowest air bag layer without the connecting rod structure combination utilizes the air pressure balance principle to lead the aircraft to automatically adjust the angle along with the change of the gravity center in the jacking process (fixed point rotation).
3. According to the invention, the jacking device comprises a height adjusting assembly and an angle adjusting assembly, wherein the height adjusting assembly is used for adjusting the position limit of the horizontal height of the oil cylinder, and the angle adjusting assembly is used for adjusting the axial angle of the oil cylinder and the adapter.
4. In the invention, a plurality of air bags are longitudinally stacked to serve as a height adjusting component and an angle adjusting component, and when each air bag is inflated, the air bags are expanded to further realize height adjustment.
5. In the invention, because the air bag is a flexible jacking piece, the stress area of the bottom of the air bag can be adjusted according to the inflation quantity, thereby ensuring the contact area between the bottom surface of the air bag and the ground. For promoting the stability of jacking process, every layer adopts the even interval arrangement of a plurality of gasbags to form the gasbag layer, because its lifting surface is enough big when cooperating with soft base face, soft base face receives pressure little, consequently can not cause soft base face to take place sunken like current jacking device, effectively prevents that jacking system from taking place to empty.
6. In the invention, because the air bags are flexible jacking parts, the rigidity among the air bags needs to be improved by matching with other height adjusting components, so that the air bags are prevented from collapsing in the jacking process. The connecting flanges are hinged and connected with a plurality of connecting rods made on the outer edge in a matched mode, so that the connecting flanges can be parallel to each other, the connecting flanges form a framework, the connecting rods form joints, and when the air bag is inflated, the air bag from the secondary bottom layer to the top layer is always in a straight line. The bottom layer of the air bag is not provided with the connecting flange, and the connecting flange is used as a rotating shaft, and the change of the axis angle is realized through the change of the inflation quantity of different air bags on the bottom layer, so that the top layer of the air bag swings in a certain range relative to a reference line in the vertical direction.
7. In the invention, the adjacent air bags in the vertical direction are hinged by adopting the connecting rod, and the air bags in the horizontal direction are integrally connected by adopting the cross beam, so that the air bags in the height adjusting assembly can be expanded to only realize the adjustment of the height position, and the horizontal position and the swinging angle are effectively limited.
8. According to the invention, the corresponding jacking method is derived based on the jacking system, and compared with the traditional jacking device, the method is simpler and more convenient to operate, more accurate in positioning and more stable and faster in jacking.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of the jacking state.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The invention discloses a jacking system for an aircraft, which comprises an oil cylinder 2, wherein an adapter 1 is installed at the lifting end of the oil cylinder, and the oil cylinder can control the adapter to move up and down.
In this embodiment, the lower tip of hydro-cylinder is installed in a mount pad, and this mount pad includes two mounting panels 3 that the interval set up from top to bottom, two mounting panel parallel interval set up, install along vertical direction between two mounting panels the hydro-cylinder, the piston rod of hydro-cylinder upwards sets up, and its tip is installed the adapter, two mounting panels outer along the even interval in position install a plurality of otic placodes 4, otic placode upper end and the mounting panel hinge dress that is located the top, otic placode lower extreme and the mounting panel hinge dress that is located the below, a plurality of otic placodes all with two mounting panels mutually perpendicular, the tip that the mounting panel was kept away from to these two otic placodes is fixed through the installation of installation component 5 and jacking device.
In this embodiment, the mount pad and the otic placode adopt the structure of movable mounting, and the hookup location of two mounting panels and otic placodes all adopts 15 round pins of shackle to assemble.
In this embodiment, jacking device includes height adjusting part and angle adjusting part, and wherein height adjusting part is used for the level of adjustment hydro-cylinder, and angle adjusting part is used for adjusting the inside angle of adapter horizontal direction.
In this embodiment, height adjustment subassembly and angle adjustment subassembly all adopt gasbag 8, and a plurality of gasbags are vertically stacked, are located the bottom and are angle adjustment subassembly, and a plurality of gasbags that are located above the bottom are height adjustment subassembly.
In this embodiment, the air bags of each bottom layer are mounted in a bottom plate 10, the lower end surface of which is made flat. In order to facilitate the moving and hoisting of the jacking system, a plurality of lifting lugs 11 are uniformly arranged in the bottom plate at intervals. The adjacent bottom plates are connected and fixed by a connecting plate 13.
In this embodiment, the air bags are arranged in groups, each group includes a plurality of air bags, and the plurality of air bags in the same group are uniformly arranged at intervals along the horizontal direction to form an air bag layer.
In this embodiment, the height adjustment assembly further includes a plurality of connection flanges 9, a connection flange is installed at the lower end portion and the upper end portion of each air bag, each connection flange is arranged along the horizontal direction, and the connection flanges are parallel to each other.
In the embodiment, in order to improve the convenience of assembling and disassembling the air bag layer, the connecting flanges adjacent to each other in the vertical direction are assembled in the manufactured pin holes through 6 pins of the pin shaft, and a certain air bag layer can be removed or added through disassembling the pin shaft.
In the embodiment, a plurality of connecting rods 7 are hinged between adjacent connecting flanges in the vertical direction, and the connecting rods are uniformly arranged at the outer edge of the connecting flanges at intervals.
In this embodiment, the connecting flanges adjacent to each other in the horizontal direction are integrally connected by the cross beam 12. In order to improve the strength of the cross beams, a pair of pull belts 14 is arranged between two adjacent cross beams in the vertical direction, and the end parts of the two cross beams are diagonally oppositely pulled by the same pair of pull belts in a crossed manner.
Example 1:
in practical application, the jacking system adopts a design structure of 48 spherical air bags with 2 rows, 2 columns and 12 layers. 12 vertical spherical air bags are provided with 12 connecting flanges, each connecting flange is square, the connecting rods are integrally manufactured in the middle of the four sides of each connecting flange, and the adjacent connecting rods in the vertical direction are fixedly installed through pin shafts.
The four air bags at the bottom layer are in a group of two, and each group is used as a unit to control air pressure. 11 air bag layers from the bottom layer to the top layer, four air bags in each air bag layer form a group, each group is used as a unit to control air pressure, and corresponding pipelines, valves, air pumps, air pressure meters and other related inflating components are required to be arranged outside the air bags in each unit. The rated air pressure of the jacking system is 1MPa, the initial height is 2m, the maximum jacking height is 6.5m, the maximum allowable axis offset angle is 7 degrees, the rated load is 160t, and the occupied area is 3.4m multiplied by 3.4 m.
The using process of the invention is as follows:
the invention comprises the following steps, (labeling each air bag layer for convenient description, dividing the air bag layer from the bottom layer to the top layer by 1-12 layers respectively, wherein the bottom layer is the 1 st layer, the top layer is the 12 th layer, and the air bag layers between the bottom layer and the top layer are sequentially increased by 2-11.)
Step 1: when the height of the jacking spherical air bag layer fixedly installed is more than 800mm from the height of a jacking fulcrum of the aircraft, the 12 th layer and 0.4MPA are inflated synchronously, so that the 12 th layer of air bag is lifted to a connecting rod with tension (the estimated height is 450 mm);
step 2: the four air bags on the 1 st layer are inflated to the height of about 300mm, no external load exists at the moment, the actual inflation pressure is less than 0.1MPa only under the condition of self weight, and if the initial height is less than 800mm, the first step can be skipped, and the second step is directly operated;
and step 3: lifting or lowering four air bags (respectively inflating or deflating) in the air bag layer of the layer 1, wherein the air bag layer can rotate, simultaneously lifting the oil cylinder to enable the spherical surface to be matched with the ball socket, continuously lifting the oil cylinder until the safety valve is automatically opened (the pressure of the safety valve is recommended to be set to be 1MPa), and keeping the oil cylinder static after the safety valve is opened, namely stopping lifting; in the process, the lifting speed of the oil cylinder is slow (the lifting speed is 3-10 mm/s, and the operation mode is manual/electric); note that: the process only allows the lifting action of the oil cylinder to enable the spherical surface of the jack to be matched with the ball socket of the aircraft, and the air bag layer does not need to be lifted to operate the process, so that the lifting speed of the air bag layer is too high to damage the aircraft;
and 4, step 4: the 1 st layer of 4 air bags has independent inflation/deflation and intercommunication functions (each pipeline of the four-way valve can be independently controlled to be opened and closed and can be communicated with each other), after the step 3, the intercommunication function between the first layers is opened, the 12 th layer of the air bags is lifted, the pressure of the 12 th layer of the air bags is enabled to reach 1MPa, and the aircraft starts to be jacked; in the same way, the 109876 th-layer air bag layer 2 is lifted to 1MPa in sequence until the rescue height requirement is met; note that: in the process, the intercommunication of the first air bag layer is always kept in an open state; the oil cylinder safety valve is also in an open state all the time;
and 5: in the descending process, the opening state of the 1 st layer of air bag intercommunication function is kept, the opening state of the oil cylinder safety valve is kept, the 2 nd layer is deflated firstly, the oil cylinder safety valve is closed, the oil cylinder falls back, and finally the 1 st layer of air bag is deflated to complete the retraction.
Jacking height comparison table
| Number of |
4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Height of initial trial | 1190 | 1290 | 1390 | 1490 | 1590 | 1690 | 1790 | 1890 | 1990 |
| Maximum jacking height | 3110 | 3560 | 4010 | 4460 | 4910 | 4360 | 5810 | 6260 | 6710 |
Jacking load comparison table
| Air pressure (MPa) | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 |
| Rated load day (t) | 32 | 48 | 64 | 80 | 96 | 112 | 128 | 144 | 160 |
In the invention, the oil cylinder in the existing device is kept to be matched with the adapter to serve as a terminal for outputting the jacking force, the jacking device is adopted to replace the original tripod mechanism, the axial angle adjusting capability in a certain range is configured on the basis of ensuring that the oil cylinder and the adapter can synchronously lift, and the problem that the jacking angle in the prior art is not adjustable is solved.
According to the invention, the oil cylinder is fixed in the mounting seat, the fixing mode adopts spherical surface contact, the jacking process of the aircraft approximately rotates with a fixed point, and the spherical surface contact ensures that the oil cylinder is not subjected to radial force during jacking; and a plurality of lug plates are arranged outside the oil cylinder for fixing, namely the reaction force of the jacking of the oil cylinder is dispersed. The lowest air bag layer without the connecting rod structure combination utilizes the air pressure balance principle to lead the aircraft to automatically adjust the angle along with the change of the gravity center in the jacking process (fixed point rotation).
According to the invention, the jacking device comprises a height adjusting assembly and an angle adjusting assembly, wherein the height adjusting assembly is used for adjusting the position limit of the horizontal height of the oil cylinder, and the angle adjusting assembly is used for adjusting the axial angle of the oil cylinder and the adapter.
In the invention, a plurality of air bags are longitudinally stacked to serve as a height adjusting component and an angle adjusting component, and when each air bag is inflated, the air bags are expanded to further realize height adjustment.
In the invention, because the air bag is a flexible jacking piece, the stress area of the bottom of the air bag can be adjusted according to the inflation quantity, thereby ensuring the contact area between the bottom surface of the air bag and the ground. For promoting the stability of jacking process, every layer adopts the even interval arrangement of a plurality of gasbags to form the gasbag layer, because its lifting surface is enough big when cooperating with soft base face, soft base face receives pressure little, consequently can not cause soft base face to take place sunken like current jacking device, effectively prevents that jacking system from taking place to empty.
In the invention, because the air bags are flexible jacking parts, the rigidity among the air bags needs to be improved by matching with other height adjusting components, so that the air bags are prevented from collapsing in the jacking process. The connecting flanges are hinged and connected with a plurality of connecting rods made on the outer edge in a matched mode, so that the connecting flanges can be parallel to each other, the connecting flanges form a framework, the connecting rods form joints, and when the air bag is inflated, the air bag from the secondary bottom layer to the top layer is always in a straight line. The bottom layer of the air bag is not provided with the connecting flange, and the connecting flange is used as a rotating shaft, and the change of the axis angle is realized through the change of the inflation quantity of different air bags on the bottom layer, so that the top layer of the air bag swings in a certain range relative to a reference line in the vertical direction.
In the invention, the adjacent air bags in the vertical direction are hinged by adopting the connecting rod, and the air bags in the horizontal direction are integrally connected by adopting the cross beam, so that the air bags in the height adjusting assembly can be expanded to only realize the adjustment of the height position, and the horizontal position and the swinging angle are effectively limited.
According to the invention, the corresponding jacking method is derived based on the jacking system, and compared with the traditional jacking device, the method is simpler and more convenient to operate, more accurate in positioning and more stable and faster in jacking.
Claims (9)
1. The utility model provides a jacking system for aircraft, includes a hydro-cylinder, an adapter is installed to the lift end of hydro-cylinder, and displacement, its characterized in that about the steerable adapter of this hydro-cylinder takes place: and a jacking device is arranged below the oil cylinder and used for synchronously moving the oil cylinder and the adapter up and down and adjusting the axis angle of the adapter in the horizontal direction.
2. The jacking system for aircraft according to claim 1, wherein: the lower tip of hydro-cylinder is installed in a mount pad, and a plurality of otic placodes are installed to this mount pad outside even interval, the installation of the tip and the jacking device that the mount pad was kept away from to the otic placode is fixed.
3. The jacking system for aircraft according to claim 1, wherein: the jacking device comprises a height adjusting assembly and an angle adjusting assembly, wherein the height adjusting assembly is used for adjusting the horizontal height of the oil cylinder, and the angle adjusting assembly is used for adjusting the horizontal inward angle of the adapter.
4. The jacking system for aircraft according to claim 3, wherein: the height adjusting assembly and the angle adjusting assembly are both air bags, the air bags are stacked longitudinally, the angle adjusting assembly is positioned on the bottom layer, and the air bags positioned on the bottom layer are height adjusting assemblies.
5. The aircraft jacking system as claimed in claim 4, wherein: the air bags are arranged in groups, each group comprises a plurality of air bags, and the air bags in the same group are uniformly arranged at intervals along the horizontal direction to form an air bag layer.
6. Jacking system for aircraft according to claim 4 or 5, wherein: the height adjusting assembly further comprises a plurality of connecting flanges, the lower end part and the upper end part of each air bag are respectively provided with one connecting flange, each connecting flange is arranged along the horizontal direction, and the connecting flanges are parallel to each other.
7. The aircraft jacking system of claim 6, wherein: and a plurality of connecting rods are hinged between the adjacent connecting flanges in the vertical direction, and the connecting rods are uniformly arranged at the outer edge positions of the connecting flanges at intervals.
8. The aircraft jacking system of claim 6, wherein: and the adjacent connecting flanges in the horizontal direction are integrally connected by adopting a cross beam.
9. The jacking method of the jacking system for the aircraft according to any one of claims 1 to 8, wherein:
the lifting and lowering of which comprises the following steps,
step 1: when the height of the jacking system which is fixedly installed is more than 800mm from the jacking fulcrum of the aircraft, the top airbag is synchronously inflated to 0.4MPA, so that the top airbag is lifted to a state that the connecting rod has tension;
step 2: inflating four air bags in the air bag layer of the bottom layer to the height of about 300mm, wherein no external load exists at the moment, the actual inflation pressure is less than 0.1MPa only under the condition of self weight, and if the initial height is less than 800mm, the first step can be skipped, and the second step is directly operated;
and step 3: lifting or lowering the four air bags in the air bag layer at the bottom layer, wherein the air bag layer can rotate, simultaneously lifting the oil cylinder to enable the spherical surface to be matched with a ball socket of the aircraft, continuously lifting the oil cylinder until the safety valve is automatically opened, and keeping the oil cylinder static after the safety valve is opened, namely stopping lifting;
and 4, step 4: the 4 air bags at the bottom layer have independent inflation, deflation and intercommunication functions, after the step 3, the intercommunication function between the first layers is opened, the air bag layer at the bottom layer is raised, the pressure of the air bag layer reaches 1MPa, and the aircraft starts to be jacked; in this way, the air bag layer of each layer is lifted to 1MPa in sequence until the rescue height requirement is met;
and 5: and in the descending process, keeping the opening state of the bottom layer air bag intercommunication function and the opening state of the oil cylinder safety valve, firstly deflating the air bag layer of the secondary bottom layer, deflating layer by layer until reaching the top layer, closing the oil cylinder safety valve, falling back the oil cylinder, and finally deflating the bottom layer air bag to finish the retraction.
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| CN202110036909.2A CN112723216A (en) | 2021-01-12 | 2021-01-12 | Jacking system and jacking method for aircraft |
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| CN202110036909.2A CN112723216A (en) | 2021-01-12 | 2021-01-12 | Jacking system and jacking method for aircraft |
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Application publication date: 20210430 |