CN118328048A - High-pressure-resistant cylinder seat assembly of aircraft wheel - Google Patents

Abstract

The invention relates to an aircraft wheel high pressure resistant cylinder block assembly, comprising: the cylinder seat comprises a cylinder seat base body, a piston assembly, a first sealing assembly and a second sealing assembly; the cylinder block base member is provided with a plurality of piston installation cavities around its center equipartition above that, installs the piston subassembly in the piston installation cavity, sets up first seal assembly between piston assembly's piston bush and the hydraulic piston, and the second seal assembly includes: the step sliding ring is sleeved on the piston pull rod in the sealing cavity, a first sealing ring is sleeved between the outer ring of the step sliding ring and the hole wall of the mounting hole, a supporting ring is arranged between one side of the step sliding ring facing the inside of the barrel-shaped body and the shell, and a limiting component for limiting the movement of the supporting ring is arranged on one side of the step sliding ring facing away from the supporting ring. The device realizes sealing through the step slip ring, the step slip ring is matched with the piston pull rod, the step slip ring is elastically deformed towards the center after being extruded by the first sealing ring, and the compression sealing interface plays a role in sealing so as to meet the sealing requirement of ultrahigh pressure.

Description

High-pressure-resistant cylinder seat assembly of aircraft wheel

Technical Field

The invention relates to the technical field of cylinder seats, in particular to an aircraft wheel high-pressure-resistant cylinder seat assembly.

Background

With the development of modern aviation technology, aircraft weight requirements are becoming more and more stringent, weight and other technical performance needs to be balanced when aircraft institutions are designed, and higher weight needs larger engine thrust, so that overall design difficulty of the aircraft is greater, and design reduction of the aircraft becomes key. According to researches, the pressure of the hydraulic system of the airplane is increased from 29MPa to 35MPa, and the weight of the hydraulic system is reduced by more than 20%, so that the working pressure of the hydraulic system of the novel airplane at home and abroad in recent years becomes a development direction, the working pressure system of the hydraulic system of the airplane is increased to be 35MPa at the highest at present, and the trend of further increase is still seen in the follow-up.

The cylinder seat component of the aircraft wheel braking device is a core component of an aircraft landing gear system, the braking device generates braking moment to brake the aircraft wheel under the action of hydraulic pressure to realize aircraft braking deceleration, the cylinder seat component needs to bear the braking pressure of an aircraft hydraulic system in the working process, according to the compression strength requirement of accessories of the aircraft hydraulic system, the maximum breaking pressure of the cylinder seat is required to be not broken under 3 times of the maximum working pressure, if a product is a 40MPa pressure system, the maximum breaking pressure of the cylinder seat is improved to 120MPa, the compression resistance requirement of the cylinder seat is obviously improved, meanwhile, the sealing performance requirement of each sealing part of the cylinder seat component is obviously improved under the influence of the maximum working pressure, and the original sealing performance is difficult to meet the requirement of high pressure resistance.

Accordingly, there is a need to provide an aircraft wheel high pressure resistant cylinder block assembly that addresses the above-described issues.

Disclosure of Invention

The invention provides a high-pressure-resistant cylinder seat assembly of an aircraft wheel, which solves the problems that when the maximum breaking pressure of a cylinder seat is increased to 120MPa, the pressure-resistant capacity requirement of the cylinder seat is obviously increased, and meanwhile, the sealing performance requirement of each sealing part of the cylinder seat assembly is obviously increased under the influence of the maximum working pressure increase, and the original sealing performance is difficult to meet the high-pressure-resistant requirement.

The invention relates to an aircraft wheel high-pressure-resistant cylinder seat assembly, which adopts the following technical scheme: comprising the following steps:

a cylinder seat base body, on which a plurality of piston mounting cavities are uniformly distributed around the center;

A piston assembly, comprising: the piston bushing is sleeved and fixed in the piston mounting cavity, the hydraulic piston is sleeved in the piston bushing, the hydraulic piston is a barrel-shaped body, a shell is arranged at the inner bottom of the barrel-shaped body, through holes for mounting the piston pull rod are formed in the shell, the barrel-shaped body and the piston bushing, and a sealing cavity is formed by the shell and a section of through hole in the barrel-shaped body;

A first seal assembly disposed between the piston liner and the hydraulic piston;

And a second seal assembly comprising: the step slip ring is sleeved on the piston pull rod in the sealing cavity, a first sealing ring is sleeved between the outer ring of the step slip ring and the hole wall of the mounting hole, a supporting ring is arranged between one side of the step slip ring facing the inside of the barrel-shaped body and the shell, and a limiting component for limiting the movement of the supporting ring is arranged on one side of the step slip ring facing away from the supporting ring.

Preferably, the first sealing assembly comprises: the T-shaped rubber ring is arranged in a first sealing groove formed in the periphery of the hydraulic piston, and a first check ring is arranged between the outer ring of the T-shaped rubber ring and the groove wall of the first sealing groove.

Preferably, the spacing assembly comprises:

The metal baffle ring is sleeved on the piston pull rod at one side of the stepped slip ring, which is away from the support ring;

And the clamping hoop is arranged on one side of the metal baffle ring, which is away from the supporting ring, and the periphery of the clamping hoop is clamped on the inner wall of the through hole.

Preferably, the cylinder seat base body is provided with an exhaust hole and an oil drain hole, and the exhaust hole and the oil drain hole are correspondingly provided with an exhaust nozzle and an oil drain nozzle; the exhaust hole is communicated with one of the piston installation cavities, the oil drain hole is communicated with the other piston installation cavity, the piston installation cavity communicated with the exhaust hole is opposite to the piston installation cavity communicated with the exhaust hole, and the exhaust hole is located at the lowest point during installation.

Preferably, a third sealing assembly is arranged between the exhaust nozzle and the exhaust hole and on the non-threaded section between the oil nozzle and the oil drain hole, and the third sealing assembly comprises: the second check ring and the second sealing ring are sleeved on the non-threaded sections between the exhaust nozzle and the exhaust hole and between the oil drain nozzle and the oil drain hole.

Preferably, one of the piston mounting chambers of the cylinder block base body is further connected with a high pressure resistant elbow joint assembly comprising: the cylinder seat is characterized in that one end of the L-shaped hollow elbow is connected with a pipe joint mounting hole on the cylinder seat base body, the other end of the L-shaped hollow elbow is provided with a cone port interface structure which is matched with a hydraulic port, the outer ring of the L-shaped hollow elbow of the cone port interface structure is provided with a protective cover, and a third sealing ring and a third check ring are arranged in a sealing groove formed in the inner wall of the pipe joint hole.

Preferably, the piston mounting cavities of the cylinder seat base body are communicated through oil way holes, the process holes for processing the oil way holes are formed in the cavity walls of the piston mounting cavities at the starting position and the ending position of the oil way holes, and a closed plug sleeve is welded in each process hole.

Preferably, rectangular reinforcing ribs are arranged in adjacent piston mounting cavities of the cylinder seat base body, and the oil path holes are formed in the rectangular reinforcing ribs and are communicated with the adjacent piston mounting cavities.

Preferably, the center of the cylinder seat base body is provided with a mounting through hole, a plurality of high-strength bolts used for being connected with the brake shell are arranged around the mounting through hole on the cylinder seat base body, and trapezoid reinforcing ribs with trapezoid cross sections are arranged on the cylinder seat base body between the mounting through hole and each piston cavity.

Preferably, lightening holes are formed in the cylinder seat base body between the trapezoid reinforcing ribs and the rectangular reinforcing ribs.

The beneficial effects of the invention are as follows:

1. Compared with the structure of double rectangular protection rings and O-shaped rings in the prior art, the second sealing assembly adopts the sealing structure of the stepped sliding ring and the first sealing ring, so that the sealing structure and principle are changed, the first sealing ring structure is unchanged, but the function of the first sealing ring is adjusted, the O-shaped rings in the prior art are used for being pressed and deformed to fill sealing gaps, the filling sealing groove is a rectangular groove and is not contacted with the gaps of movable sealing, the function of the stepped sliding ring for sealing is pressed, the function of the stepped sliding ring is changed, the protection rings are cancelled, the stepped sliding ring is matched with a piston pull rod, the stepped sliding ring is elastically deformed towards the center after being pressed by the first sealing ring, and a compression sealing interface plays a sealing role, so that the ultrahigh-pressure sealing requirement is met.

2. Compared with the structure of double rectangular protection rings and O-shaped rings in the prior art, the first sealing assembly is arranged between the piston bushing and the hydraulic piston, and adopts a combined sealing structure of the double rectangular protection rings and the T-shaped rubber rings; under hydraulic pressure, elastic deformation takes place for T type rubber circle of cross-section for T type, combines the first retaining ring on T type rubber circle left side and right side, and required packing deformation of T type rubber circle under the superhigh pressure reduces, and the sealing washer is difficult for appearing damaging, reduces the sealing washer performance requirement in addition, is favorable to guaranteeing the sealing performance under the high pressure state more.

3. Secondly, compared with the traditional cylinder seat matrix which adopts an aluminum alloy material, the pressure resistance of the structure of the titanium alloy material adopted by the invention is obviously improved; compared with the traditional cylinder seat, the invention has the advantages that the trapezoid reinforcing ribs are arranged between the central hole of the cylinder seat base body and the central holes of the piston mounting cavities, and the rectangular reinforcing ribs are arranged between every two piston mounting cavities, so that the supporting strength and the overall rigidity of the cylinder seat under high pressure are ensured.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic general structural view of an embodiment of an aircraft wheel high pressure resistant cylinder block assembly of the present invention;

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a schematic illustration of the connection of the closure plug to the cylinder block base;

FIG. 4 is a schematic structural view of a piston assembly;

FIG. 5 is a schematic diagram of the connection of the oil drain nozzle to the cylinder block base;

fig. 6 is a schematic illustration of the connection of the high pressure resistant elbow joint assembly to the cylinder block base.

In the figure: 1. a cylinder block base; 2. closing the plugging sleeve; 3. a first seal assembly; 4. a second seal assembly; 5. a third seal assembly; 6. a high pressure resistant elbow joint assembly; 7. an exhaust hole; 8. an oil drain hole; 9. a piston assembly; 11. rectangular reinforcing ribs; 12. lightening the hole; 13. a high strength bolt; 14. trapezoidal reinforcing ribs; 15. installing a circular ring seat; 21. a plugging base body; 22. welding joints; 31. a first retainer ring; 32. t-shaped rubber rings; 41. a clamp; 42. a metal baffle ring; 43. a step slip ring; 44. a first seal ring; 45. a support ring; 51. the second check ring; 52. a second seal ring; 61. a elbow joint hole; 62. a square structure; 63. an L-shaped hollow elbow; 64. a protective cover; 65. a third retainer ring; 66. a third sealing ring; 81. a threaded connection; 82. an oil drain nozzle; 91. a piston bush; 92. a hydraulic piston; 921. a housing; 93. a piston pull rod.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

An embodiment of an aircraft wheel high pressure resistant cylinder block assembly of the present invention, as shown in fig. 1, comprises: the cylinder seat comprises a cylinder seat base body 1, a piston assembly 9, a first sealing assembly 3 and a second sealing assembly 4, wherein a plurality of piston mounting cavities are uniformly distributed on the cylinder seat base body 1 around the center; the piston assembly includes: the piston bushing 91, the hydraulic piston 92 and the piston pull rod 93 are sleeved and fixed in the piston mounting cavity, the hydraulic piston 92 is sleeved in the piston bushing 91, the hydraulic piston 92 is a barrel-shaped body, a shell 921 is arranged at the inner bottom of the barrel-shaped body, through holes for mounting the piston pull rod 93 are formed in the shell 921, the barrel-shaped body and the piston bushing 91, and a sealing cavity is formed by the shell 921 and a section of through hole in the barrel-shaped body; the first seal assembly 3 is disposed between the piston bushing 91 and the hydraulic piston 92; the second seal assembly 4 includes: the step slip ring 43, the step slip ring 43 cover is established on the piston pull rod 93 in the sealed chamber, and the cover is equipped with first sealing washer 44 between the pore wall of step slip ring 43 outer lane and mounting hole, is provided with support ring 45 between the inside one side of step slip ring 43 towards the staving and the casing, and one side that step slip ring 43 deviates from support ring 45 is provided with the spacing subassembly that restriction support ring 45 removed.

The second embodiment of the present invention employs a stepped ring and O-ring structure, as compared with the double rectangular protection ring and O-ring structure of the prior art. The working principle of the movable seal of the piston pull rod is that under the hydraulic pressure, the seal ring is elastically deformed, fills the seal gap and seals the seal interface. Because the sealing ring groove is of a rectangular groove structure, under the action of high pressure (more than 100 MPa), the O-shaped sealing ring of the sealing ring groove needs to generate extremely large deformation (the cross section of the O-shaped sealing ring is polygonal when the O-shaped sealing ring is compressed during working), the performance of the existing sealing material is difficult to meet the requirement, and meanwhile, the O-shaped sealing ring is pushed into a sealing gap and can be damaged in the movement process. In this embodiment, the sealing structure and principle are changed, the first sealing ring still adopts an O-ring structure, but the function of the first sealing ring is adjusted, the O-ring in the prior art is used for being pressed and deformed to fill a sealing gap, the rectangular groove of the sealing ring is filled in the prior art, the sealing ring is not contacted with a movable sealing gap, the sealing ring simultaneously plays a role of extruding a step sliding ring for sealing, the function of the sealing ring is changed, the protection ring is cancelled, the sealing is realized through the step sliding ring, the step sliding ring is matched with a piston pull rod, the sealing interface is compressed to play a sealing role after the step sliding ring is extruded by the first sealing ring, and the sealing requirement of ultrahigh pressure is met.

Specifically, the first seal assembly 3 includes: the T-shaped rubber ring 32, the T-shaped rubber ring 32 is arranged in a first sealing groove formed in the periphery of the hydraulic piston 92, and a first check ring 31 is arranged between the outer ring of the T-shaped rubber ring 32 and the groove wall of the first sealing groove; the cross section of the first check ring 31 is rectangular, and a first sealing component is arranged between the piston bushing and the hydraulic piston, and compared with the structure of double rectangular protection rings and O-shaped rings in the prior art, the first sealing component adopts a combined sealing structure of the double rectangular protection rings and T-shaped rubber rings; the working principle of the combined seal is that under the hydraulic pressure, the seal ring is elastically deformed, a seal gap is filled, and a seal interface is sealed; because the sealing ring groove is of a rectangular groove structure, under the action of high pressure (more than 100 MPa), the O-shaped sealing ring of the sealing ring groove needs to generate extremely large deformation (the sealing ring is compressed into a polygon shape when in operation), the performance of the existing sealing material is difficult to meet the requirement, and meanwhile, the sealing ring groove is pushed into a sealing gap and can be damaged in the movement process. The technical advantage of this project lies in, through having changed the structure of sealing washer, by the cross-section of O type adjustment for the T type, combine to install the guard circle on left side and right side, the required packing deformation of sealing washer under the superhigh pressure reduces, and the sealing washer is difficult for appearing the damage, reduces the sealing washer performance requirement in addition, is favorable to guaranteeing the sealing performance under the high pressure state more.

Specifically, spacing subassembly includes: the metal baffle ring 42 and the clamp 41, wherein the metal baffle ring 42 is sleeved on the piston pull rod 93 at one side of the stepped slip ring 43, which is away from the support ring 45; the clip 41 is provided on the side of the metal retainer ring 42 facing away from the support ring 45, and its outer periphery is snapped onto the inner wall of the through hole.

Specifically, the cylinder seat base body 1 is provided with an exhaust hole 7 and an oil drain hole 8, and the exhaust hole 7 and the oil drain hole 8 are correspondingly provided with an exhaust nozzle and an oil drain nozzle; the exhaust hole 7 is communicated with one of the piston installation cavities, the oil drain hole 8 is communicated with the other piston installation cavity, the piston installation cavity communicated with the exhaust hole 7 is opposite to the piston installation cavity communicated with the exhaust hole 8, and the exhaust hole 8 is positioned at the lowest point during installation.

Specifically, the third seal assembly 5 is disposed between the exhaust nozzle and the exhaust hole 7, and on the non-threaded section between the oil nozzle and the oil drain hole 8, and the third seal assembly 5 includes: the second check ring 51 and the second seal ring 52 are sleeved on the non-threaded section between the exhaust nozzle and the exhaust hole 7 and between the oil nozzle and the oil discharge hole 8, so that high-point exhaust is realized, oil discharge is realized at a low point, hydraulic pressure and air are discharged from the opened exhaust nozzle, and the abnormal hydraulic pressure caused by gas accumulated in the piston cavity is avoided; hydraulic oil is discharged from the piston at the lowest point, a piston cavity can be purified through oil discharge, clamping stagnation of a precise hydraulic component of a hydraulic system is avoided, and the third sealing assembly is used for realizing static sealing of a threaded part. The prior art adopts half open sealing washer groove generally, install the O circle in the screw thread clearance groove, seal with the mounting hole cooperation, its defect lies in that clearance groove is close the screw thread, the sealing member is easily received the fish tail of screw thread during the installation, in addition in the installation sealing washer compression deformation gradually, the O type circle also can be because the screw thread closes, be close to the screw thread position and closed the incised wound by the screw, cause sealed inefficacy, very easily follow incision damage position fracture under the superhigh pressure service environment, sealed inefficacy, in addition screw thread installation position is easy not hard up under the mechanical vibration environment, the sealing washer is easy to squeeze into in the gap after not hard up, produce under the high pressure and squeeze into the damage. As shown in fig. 5, in the prior art, the installation and the sealing part of the thread are separated, the sealing piece is not installed at the thread withdrawal groove part, the screwing cutting injury and the thread scratch of the sealing ring are avoided, the sealing groove only used for sealing the pipe thread is specially added, the sealing structure is adjusted into an O-shaped ring and a protection ring by a single O-shaped ring, the sealing is not affected even if the thread is loosened, and the performance under the ultra-high pressure sealing condition is more excellent.

Specifically, one of the piston mounting chambers of the cylinder block base body 1 is further connected with a high-pressure-resistant union joint assembly 6, and the Gao Yawan-resistant union joint assembly 6 includes: the L-shaped hollow elbow 63, one end of the L-shaped hollow elbow 63 is connected with a pipe joint mounting hole on the cylinder seat base body 1, the other end of the L-shaped hollow elbow 63 is provided with a cone port interface structure which is matched with a hydraulic port, the outer ring of the L-shaped hollow elbow 63 of the cone port interface structure is provided with a protective cover 64, and a third sealing ring 66 and a third check ring 65 are arranged in a sealing groove formed in the inner wall of the pipe joint hole 61.

Specifically, the piston mounting cavities of the cylinder seat base body 1 are communicated through oil way holes, the process holes for processing the oil way holes are formed in the cavity walls of the piston mounting cavities at the starting position and the ending position of the oil way holes, and the sealing plug sleeve 2 is welded in the process holes.

Specifically, rectangular reinforcing ribs 11 are arranged in adjacent piston mounting cavities of the cylinder seat base body 1, wherein the oil path holes are formed in the rectangular reinforcing ribs 11 and are communicated with the adjacent piston mounting cavities.

Specifically, the center of the cylinder seat base body 1 is provided with a mounting through hole, a plurality of high-strength bolts 13 used for being connected with a brake shell are arranged around the mounting through hole on the cylinder seat base body 1, and a trapezoid reinforcing rib 14 with a trapezoid cross section is arranged on the cylinder seat base body 1 between the mounting through hole and each piston cavity.

Specifically, the cylinder block base 1 between the trapezoid reinforcing ribs 14 and the rectangular reinforcing ribs 11 is provided with a lightening hole 12.

The present embodiment is described below with reference to the accompanying drawings:

As shown in fig. 1 to 2, the material of the cylinder seat base body 1 is TC4 titanium alloy, the cylinder seat base body 1 is a disc structure with a phi 320mm mounting through hole, a maximum outer diameter phi 600mm and a maximum thickness 100mm, 6 phi 80mm high-pressure-resistant hydraulic piston mounting cavities are uniformly distributed in the circumferential direction and are used for mounting piston assemblies, sealing rings are arranged on the cavity walls of the piston mounting cavities, and the high-pressure-resistant sealing mounting positions and MJ80 multiplied by 1.5 high-pressure-resistant connecting threads with the cavity bottom diameter phi 88.6mm and the width of 6.2mm of the piston mounting cavities are formed in the middle part; rectangular reinforcing ribs 11 with the diameter of 18 multiplied by 24mm are arranged on the cylinder seat base body 1 between adjacent piston mounting cavities in the 6 piston mounting cavities, and phi 10mm hydraulic oil circuit holes are arranged in the rectangular reinforcing ribs 11; a mounting circular ring seat 15 is formed between a circular hole in the middle of the cylinder seat base body 1 and the outer ring of the cylinder seat base body 1, 12 phi 20mm high-strength bolt holes are uniformly distributed on the circular ring seat according to 6 groups and are used for connecting a brake shell by using phi 20mm high-strength bolts 13, two high-strength bolts 13 of each group are close to a piston mounting cavity, the high-strength bolts 13 are arranged on a phi 450mm indexing circle according to the spacing of 60mm, a trapezoid reinforcing rib 14 (the trapezoid bevel angle is symmetric about 20 degrees with the center point of the piston cavity) for connecting the piston cavity and the mounting circular ring seat 15 is arranged in the middle, and 6 oval lightening holes 12 with the area of 2200mm ² are formed between the mounting circular ring seat 15 and the rectangular reinforcing rib; the cylinder seat worker is installed, a MJ30 multiplied by 1.5 high-pressure-resistant exhaust port is formed in the upper side of a piston installation cavity positioned at the highest point of the cylinder seat base body 1, a MJ30 multiplied by 1.5 high-pressure-resistant oil discharge port is formed in the lower side of the piston installation cavity positioned at the lowest point of the cylinder seat base body 1, and a MJ30 multiplied by 1.5 high-pressure-resistant hydraulic piston port is formed in one right side piston installation cavity of one side of the piston installation cavity positioned at the highest point and used for installing a high-pressure-resistant elbow joint assembly 6; rectangular reinforcing ribs 11 between two adjacent piston mounting cavities are internally provided with phi 6mm oil circuit holes, the starting and ending positions of the oil circuit holes are provided with phi 10mm process holes for processing the oil circuit holes on the walls of the piston cavities, and compared with the traditional cylinder seat base body which is made of aluminum alloy materials, the pressure resistance of the structure is obviously improved by adopting the titanium alloy materials; compared with the traditional cylinder seat, the high-pressure-resistant cylinder seat is provided with the supporting ribs between the central hole of the cylinder seat and the central hole of the cavity for installing the piston, so that the supporting strength under high pressure is improved, the connecting rib plates with the size similar to the total height are designed between the piston installing cavities of the cylinder seat, and the overall rigidity of the cylinder seat is improved. And other detail structure strengthening means are adopted to strengthen the compressive strength under the ultrahigh pressure hydraulic pressure.

As shown in fig. 3, the plugging sleeve 2 comprises a plugging sleeve base 21, specifically, in this embodiment, the plugging sleeve base 21 is made of TC4 titanium alloy, the welding seam 22 is made of titanium alloy solder, the structure is a frustum structure with the maximum diameter phi 9mm and the taper of 1:10, and the plugging sleeve is installed on a process hole with the oil path hole phi 10mm on the piston cavity.

As shown in fig. 4, the first seal assembly 3 of the present embodiment is disposed between the hydraulic piston 92 and the piston bushing 91, specifically, a first seal groove is formed on the outer periphery of the hydraulic piston 92, the maximum outer diameter of the first seal groove is phi 59.4mm, the width of the first seal groove is 12.8mm, the inner diameter of the first seal groove is phi 52.4mm, the first seal groove is formed on the outer periphery near the end of the hydraulic piston 92, and the first seal groove cooperates with the piston bushing 91 with a phi 60mm inner hole to form a seal installation part; in this embodiment, the first sealing component 3 adopts a T-shaped combined seal, that is, the sealing ring adopts a T-shaped rubber ring 32, the bottom edge width of the T-shaped rubber ring 32 is 12mm, the total height is 3.5mm, the heights of two shoulders are 2mm, the widths of two shoulders are 3mm respectively, the two shoulders of the T-shaped rubber ring 32 are attached to the bottom of the first sealing groove, an area for installing a first retainer ring 31 is formed between the two sides of the T-shaped rubber ring 32 and the groove wall of the first sealing groove, the first retainer ring 31 is used for supporting a protruding elastomer in the middle of the T-shaped rubber ring 32, the first retainer ring 31 adopts carbon fiber reinforced polytetrafluoroethylene, the two first retainer rings 31 are respectively installed on the left shoulder and the right shoulder of the T-shaped sealing ring, in this embodiment, the inner diameter phi 56mm, the outer diameter phi 59.4mm and the thickness of the first retainer ring 31 are 3mm.

As shown in fig. 4, the second sealing assembly 4 of this embodiment is disposed in a sealing cavity formed by a piston pull rod 93 and a housing 921 on a hydraulic piston 92, the sealing cavity is annular, in this embodiment, the second sealing assembly 4 adopts the second sealing assembly 4, and includes a first sealing ring 44 with a diameter of Φ2.4mm, the first sealing ring 44 adopts an O-shaped elastomer, and 1 stepped slip ring 43 with a maximum width of 4.8mm, and a thickness of 3mm, the stepped slip ring 43 is sleeved on the piston pull rod 93 in the sealing cavity, the first sealing ring 44 is sleeved between an outer ring of the stepped slip ring 43 and a hole wall of a mounting hole, a supporting ring 45 is disposed between a side of the stepped slip ring 43 facing the inside of the barrel and the housing 921, and a limiting assembly for limiting movement of the supporting ring 45 is disposed on a side of the stepped slip ring 43 facing away from the supporting ring 45.

As shown in fig. 5, the third seal assemblies 5 are disposed on the non-threaded sections between the exhaust nozzle and the exhaust hole 7, and between the oil drain nozzle 82 and the oil drain hole 8, and the third seal assemblies 5 include: the second retainer ring 51 and the second seal ring 52 are sleeved on the non-threaded section between the exhaust nozzle and the exhaust hole 7 and between the oil drain nozzle 82 and the oil drain hole 8, specifically, in this embodiment, the third seal assembly 5 is arranged between the exhaust hole 7 and the oil drain hole 8 on the cylinder seat base body 1 and the threaded connecting piece 81 installed therein, the rectangular annular seal groove is arranged on the inner walls of the exhaust hole 7 and the oil drain hole 8, the inner diameter of the rectangular annular seal groove is phi 36.4mm, the inner hole sizes phi 28mm of the exhaust hole 7 and the oil drain hole 8, the width of the rectangular annular seal groove is 6.8mm, and the rectangular annular seal groove is arranged on one side of the threaded hole part of the cavity wall of the cylinder seat piston cavity and forms a seal installation part with the phi 27.6mm cylindrical surface of the threaded connecting piece 81 installed in cooperation with the threaded hole; the third sealing assembly 5 adopts a second retainer ring 51 and a second sealing ring 52 for combined sealing, namely, in the embodiment, an O-shaped ring and the retainer ring form combined sealing, the second sealing ring 52 is an elastic body phi 2.8mmO, the inner diameter of the second retainer ring 51 is phi 28mm, and the outer diameter phi 36.4mm.

As shown in fig. 6, the inner hole diameter phi of the L-shaped hollow elbow 63 of the high-pressure-resistant elbow joint assembly 6 is 12mm, the height of the long end is 80mm, the height of the short end is 60mm, the short end is used for being connected with an elbow joint hole 61 on the cylinder seat base body 1, the short end is a cone mouth interface structure matched with a hydraulic interface, an inner cone hole of 30 degrees is arranged for being matched with the hydraulic joint, and the outer circle is provided with external threads of MJ24 x1 and is used for being matched and fastened with an MJ24 jacket nut on a pipeline; the right angle turning part of the high pressure resistant elbow joint component 6 is designed into a partial square structure 62 with 18 multiplied by 18mm for increasing the compressive strength and facilitating the clamping and assembly of a spanner, and the rest pipe sections are all the rest parts with the diameter of phi 20 mm; the long end is connected with an elbow joint hole 61 on the cylinder seat base body 1, the long section is provided with MJ22 multiplied by 1 external threads and an outer circular surface with the diameter of 27.6mm matched with a sealing groove of the pipe threads on the cylinder seat, and a third check ring 66 and a third sealing ring 65 are arranged in the sealing groove in the elbow joint hole 61 of the cylinder seat base body 1.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. An aircraft wheel high pressure resistant cylinder block assembly, comprising:

a cylinder seat base body (1) is uniformly provided with a plurality of piston mounting cavities around the center thereof;

A piston assembly, comprising: the piston bushing (91), the hydraulic piston (92) and the piston pull rod (93) are sleeved and fixed in the piston mounting cavity, the hydraulic piston (92) is sleeved in the piston bushing (91), the hydraulic piston (92) is a barrel-shaped body, a shell (921) is arranged at the inner bottom of the barrel-shaped body, through holes for mounting the piston pull rod (93) are formed in the shell (921), the barrel-shaped body and the piston bushing (91), and a sealing cavity is formed between the shell (921) and one section of through hole in the barrel-shaped body;

A first seal assembly (3) disposed between the piston bush (91) and the hydraulic piston (92);

And a second sealing assembly (4) comprising: the stepped sliding ring (43), the piston pull rod (93) in the sealed chamber is established to stepped sliding ring (43) cover, and the cover is equipped with first sealing washer (44) between the pore wall of stepped sliding ring (43) outer lane and mounting hole, is provided with support ring (45) between one side and casing (921) inside stepped sliding ring (43) towards the staving, and one side that stepped sliding ring (43) deviates from support ring (45) is provided with the spacing subassembly that restriction support ring (45) removed.

2. An aircraft wheel high pressure resistant cylinder block assembly according to claim 1, wherein the first seal assembly (3) comprises: the T-shaped rubber ring (32), the T-shaped rubber ring (32) is arranged in a first sealing groove formed in the periphery of the hydraulic piston (92), and a first check ring (31) is arranged between the outer ring of the T-shaped rubber ring (32) and the groove wall of the first sealing groove.

3. The aircraft wheel high pressure resistant cylinder block assembly of claim 1, wherein the limit assembly comprises:

The metal baffle ring (42) is sleeved on a piston pull rod (93) at one side of the stepped slip ring (43) away from the support ring (45);

and a clip (41) which is arranged on one side of the metal baffle ring (42) which is away from the supporting ring (45) and the outer periphery of which is clamped on the inner wall of the through hole.

4. The high-pressure-resistant cylinder seat assembly of the aircraft wheel according to claim 1, wherein the cylinder seat base body (1) is provided with an exhaust hole (7) and an oil drain hole (8), and the exhaust hole (7) and the oil drain hole (8) are correspondingly provided with an exhaust nozzle and an oil drain nozzle (82); the exhaust hole (7) is communicated with one of the piston installation cavities, the oil drain hole (8) is communicated with the other piston installation cavity, the piston installation cavity communicated with the exhaust hole (7) is opposite to the piston installation cavity communicated with the exhaust hole (8), and the exhaust hole (8) is located at the lowest point during installation.

5. An aircraft wheel high pressure resistant cylinder block assembly according to claim 4, wherein a third seal assembly (5) is provided on the non-threaded section between the exhaust nozzle and the exhaust hole (7), and between the oil drain nozzle (82) and the oil drain hole (8), the third seal assembly (5) comprising: the second check ring (51) and the second sealing ring (52), and the second check ring (51) and the second sealing ring (52) are sleeved on the non-threaded sections between the exhaust nozzle and the exhaust hole (7) and between the oil drain nozzle (82) and the oil drain hole (8).

6. An aircraft wheel high pressure resistant cylinder block assembly according to claim 1, wherein one of the piston mounting chambers of the cylinder block base body (1) is further connected with a high pressure resistant elbow joint assembly (6), the high pressure resistant elbow joint assembly (6) comprising: the oil cylinder is characterized by comprising an L-shaped hollow elbow pipe (63), wherein one end of the L-shaped hollow elbow pipe (63) is connected with a pipe joint mounting hole on a cylinder seat base body (1), the other end of the L-shaped hollow elbow pipe (63) is provided with a cone port interface structure which is matched with a hydraulic port, the outer ring of the L-shaped hollow elbow pipe (63) of the cone port interface structure is provided with a protective cover (64), and a third sealing ring (66) and a third check ring (65) are arranged in a sealing groove formed in the inner wall of a pipe joint hole (61).

7. The high-pressure-resistant cylinder block assembly of the aircraft wheel according to claim 1, wherein the piston mounting cavities of the cylinder block base body (1) are communicated through oil way holes, the process holes for processing the oil way holes are formed in the cavity walls of the piston mounting cavities at the starting position and the ending position of the oil way holes, and a sealing plug sleeve (2) is welded in the process holes.

8. An aircraft wheel high pressure resistant cylinder block assembly according to claim 7, characterized in that adjacent piston mounting cavities of the cylinder block base body (1) are provided with rectangular reinforcing ribs (11), wherein the oil passage holes are provided in the rectangular reinforcing ribs (11) and communicate with the adjacent piston mounting cavities.

9. An aircraft wheel high pressure resistant cylinder block assembly according to claim 1, characterized in that the centre of the cylinder block base body (1) is a mounting through hole, a plurality of high strength bolts (13) for connection with the brake housing are arranged around the mounting through hole in the cylinder block base body (1), and trapezoid reinforcing ribs (14) with trapezoid cross sections are arranged on the cylinder block base body (1) between the mounting through hole and each piston cavity.

10. The high-pressure-resistant cylinder block assembly of an aircraft wheel according to claim 1, wherein a lightening hole (12) is formed in the cylinder block base body (1) between the trapezoid reinforcing rib (14) and the rectangular reinforcing rib (11).