CN218858676U

CN218858676U - Overvoltage protection device for aircraft wheel

Info

Publication number: CN218858676U
Application number: CN202223154428.0U
Authority: CN
Inventors: 张晓�; 丁斌; 陈雨; 易喆; 娄金涛
Original assignee: Xian Aviation Brake Technology Co Ltd
Current assignee: Xian Aviation Brake Technology Co Ltd
Priority date: 2022-11-27
Filing date: 2022-11-27
Publication date: 2023-04-14
Anticipated expiration: 2032-11-27

Abstract

The utility model provides an overvoltage protection device for an aircraft wheel, an upper valve body of the device is of a hollow cylinder structure, a hollow part is an exhaust pipeline for releasing air pressure when the aircraft wheel tire is in overvoltage, the upper end of the upper valve body is of a closed structure, and round holes are radially and mutually vertically formed in the upper end of the upper valve body and are communicated with the exhaust pipeline of the upper valve body; the upper end of the lower valve body is of a groove-shaped hollow structure, the lower end of the lower valve body is connected with the wheel hub, the lower end of the lower valve body is provided with an exhaust pipeline, the exhaust pipeline penetrates through the concave surface of the concave groove of the lower valve body from the lower surface of the lower valve body, and the exhaust pipeline of the lower valve body is coaxial with the exhaust pipeline of the upper valve body; the rupture disk is positioned between the exhaust pipelines of the upper valve body and the lower valve body. When the self explosion pressure is reached through the explosion piece, the automatic explosion control aircraft wheel instantaneously releases redundant pressure during overpressure, and then the aircraft wheel is protected from being exploded due to tire overpressure; the tire anti-explosion device can prevent tire overpressure explosion caused by high temperature, and has explosion-proof identification capability for wheel overpressure at normal temperature.

Description

Overvoltage protection device for aircraft wheel

Technical Field

The utility model belongs to the technical field of aircraft wheel brake design, especially, relate to an overvoltage protection device for aircraft wheel.

Background

The reasons for the over-pressure of the wheel and the tire mainly include over-standard inflation pressure, tire overload and over-high tire pressure caused by brake temperature rise.

In the related art, a hot melt plug is often used to prevent wheel failure and tire burst caused by temperature rise. The hot melt plug can prevent the tire from being burst due to overpressure caused by high temperature, but has no explosion-proof identification capability for the wheel overpressure at normal temperature.

SUMMERY OF THE UTILITY MODEL

In order to solve among the prior art hot-melt plug and not to prevent blasting discernment ability to the wheel excessive pressure under the normal atmospheric temperature, the utility model provides an aircraft is overvoltage protection device for wheel has explosion-proof broken discernment ability to the wheel excessive pressure under the normal atmospheric temperature. The technical scheme is as follows:

an overvoltage protection device for an aircraft wheel comprises an upper valve body, a lower valve body and a rupture disc, wherein the upper valve body is of a hollow cylinder structure, the hollow part is an exhaust pipeline for releasing air pressure when the aircraft wheel tire is in overpressure, the upper end of the upper valve body is of a closed structure, the upper ends of the upper valve body are radially and vertically provided with round holes, and the round holes are communicated with the exhaust pipeline of the upper valve body and used for discharging gas from the upper valve body when the tire is in overload or the inflation pressure is over-inflated; the closed structure is used for avoiding the potential safety hazard that fragments burst to the outer surface of the upper valve body after the blasting piece is blasted;

the upper end of the lower valve body is of a groove-shaped hollow structure, the lower end of the lower valve body is connected with the wheel hub, the lower end of the lower valve body is provided with an exhaust pipeline, the exhaust pipeline penetrates through the concave surface of the concave groove of the lower valve body from the lower surface of the lower valve body, and the exhaust pipeline of the lower valve body is coaxial with the exhaust pipeline of the upper valve body;

the rupture disk is positioned between the exhaust pipelines of the upper valve body and the lower valve body.

Optionally, the rupture disk is a rupture disk of a convex structure.

Optionally, the rupture disc is made of a nickel-based alloy and has a thickness of 0.2mm.

Optionally, a buffer sealing ring is arranged between the rupture disk and the upper valve body and used for sealing the joint of the rupture disk and the upper valve body and buffering the rupture disk to prevent the upper valve body from crushing the rupture disk.

Optionally, the buffer sealing ring is a pressing ring, and the pressing ring is of a middle annular structure and is used for pressing the rupture disk.

Optionally, the apparatus further comprises: the sealing strip is positioned between the rupture disk and the lower valve body and is a hollow annular sheet used for sealing the lower surface of the rupture disk.

Optionally, the outer diameter of the lower end of the upper valve body is designed with threads, and the inner diameter of the groove in the upper end of the lower valve body is designed with threads for fastening and connecting with the threads at the lower end of the upper valve body.

Optionally, the lower end of the lower valve body is provided with a thread connected with the wheel hub.

The utility model provides an aircraft is overvoltage protection device for wheel installs on aircraft wheel hub, automatic blasting control aircraft wheel instantaneous release excess pressure when excessive pressure when reaching the burst pressure of self through the rupture disk, then the protection wheel does not explode because of tire excessive pressure. The tire anti-explosion device can prevent tire overpressure explosion caused by high temperature and has explosion-proof identification capability for airplane wheel overpressure at normal temperature.

Drawings

Fig. 1 is the utility model provides an aircraft is overvoltage protection device for wheel schematic structure.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

The utility model provides an aircraft is overvoltage protector for wheel, it is a protection device that is used for aircraft wheel not to lead to the wheel tire to blow out because of tire overload or inflation pressure overcharge. As shown in fig. 1, the device comprises an upper valve body 1, a lower valve body 2 and a rupture disc 4,

the upper valve body 1 is of a hollow cylinder structure, and the hollow part is an exhaust pipeline for releasing air pressure when the tire of the airplane is in overpressure. The upper end of the upper valve body 1 is of a closed structure, two circular holes 11 (one circular hole is shown in fig. 1) are formed in the upper end in a radial direction and are perpendicular to each other, and the circular holes 11 are communicated with an exhaust pipeline of the upper valve body 1. The circular hole is an exhaust hole and is used for exhausting gas from the upper valve body 1 when the tire is overloaded or the inflation pressure is over-inflated; the closed structure is a safety hazard for avoiding fragments from bursting outside the upper valve body 1 after the rupture disk 4 is exploded. The outer diameter of the lower end of the upper valve body 1 is designed with threads.

The upper end of the lower valve body 2 is of a groove-shaped hollow structure. The inner diameter of the groove is designed with threads for fastening and connecting with the threads at the lower end of the upper valve body 1. The lower end of the lower valve body 2 is provided with threads for mounting on a wheel hub. The lower end of the lower valve body 2 is provided with an exhaust pipeline which penetrates from the lower surface of the lower valve body 2 to the concave surface of the concave groove of the lower valve body 2. The exhaust duct of the lower valve body 2 is coaxial with the exhaust duct of the upper valve body 1.

The rupture disk 4 is positioned between the exhaust pipelines of the upper valve body 1 and the lower valve body 2, the rupture disk 4 is a rupture disk with a convex structure, the rupture pressure is controlled by the strength of the material of the rupture disk 4, and when the wheel is in overpressure (tire overload or inflation pressure is over-inflated), the rupture disk 4 is ruptured to release pressure. The material and thickness of the rupture disc 4 can be designed according to the burst pressure of the rupture disc, which is determined according to the inflation pressure of the tire of the airplane wheel. For example, the burst pressure of the burst disc may be 2 to 2.5 times the inflation pressure, for example, 1.59MPa, and the burst pressure of the burst disc is 3.49MPa, the burst disc 4 may be made of a nickel-based alloy, and have a thickness of 0.2mm; when the rupture disk 4 is ruptured, the exhaust pipelines of the upper valve body 1 and the lower valve body 2 are communicated, and the gas from the tire on the wheel hub is exhausted from the exhaust pipeline of the upper valve body 1 through the exhaust pipeline of the lower valve body 2.

A buffer sealing ring is arranged between the rupture disk 4 and the upper valve body 1 and used for sealing the joint of the rupture disk 4 and the upper valve body 1 and buffering the rupture disk 4 to avoid the rupture disk 4 from being crushed by the upper valve body 1.

The utility model discloses still provide another kind of overvoltage protector for aircraft wheel, as shown in figure 1, the device includes valve body 1, lower valve body 2, rupture disk 4, clamping ring 5, gasket 3 and sealing washer 6.

The upper valve body 1 is of a hollow cylinder structure, and the hollow part is an exhaust pipeline for releasing air pressure when the tires of the airplane wheel are in overpressure. The upper end of the upper valve body 1 is of a hexagonal closed structure, two round holes are vertically formed in the radial direction of the upper end of the upper valve body, and the round holes are communicated with an exhaust pipeline of the upper valve body 1. The circular hole is an exhaust hole and is used for exhausting gas from the upper valve body 1 when the tire is overloaded or the inflation pressure is over-inflated; the closed structure is a safety hazard for avoiding fragments from bursting outside the upper valve body 1 after the rupture disk 4 is exploded. The hexagonal enclosed construction provides the tightening torque when being connected upper valve body 1 and lower valve body 2 conveniently, and the lower extreme external diameter design of upper valve body 1 has the screw thread.

The upper end of the lower valve body 2 is of a groove-shaped hollow structure. The inner diameter of the groove is designed with threads for being tightly connected with the threads at the lower end of the upper valve body 1. The lower end of the lower valve body 2 is provided with threads for mounting on a wheel hub. Meanwhile, an annular groove is formed above the lower end thread of the lower valve body 2, a sealing ring 6 is arranged in the annular groove, and the sealing ring 6 is a rubber sealing ring and used for sealing the joint of the lower valve body 2 and the wheel hub. The lower end of the lower valve body 2 is provided with an exhaust pipeline which penetrates from the lower surface of the lower valve body 2 to the concave surface of the concave groove of the lower valve body 2. The exhaust duct of the lower valve body 2 is coaxial with the exhaust duct of the upper valve body 1.

The rupture disk 4 is positioned between the exhaust pipelines of the upper valve body 1 and the lower valve body 2, the rupture disk 4 is a rupture disk with a convex structure, the exhaust pipelines of the upper valve body 1 and the lower valve body 2 are communicated, and gas from a tire on a wheel hub is exhausted from the exhaust pipeline of the upper valve body 1 through the exhaust pipeline of the lower valve body 2.

The pressing ring 5 is located between the rupture disk 4 and the upper valve body 1, and the pressing ring 5 is of a middle annular structure and used for pressing the rupture disk 4.

The sealing sheet 3 is positioned between the rupture disk 4 and the lower valve body 2, and the sealing sheet 3 is a hollow annular sheet and is used for sealing the lower surface of the rupture disk 4.

When the overvoltage protection is assembled, the lower valve body 2 is used as a base body. The sealing plate 3 is horizontally placed in the groove of the lower valve body 2, and the lower surface of the sealing plate 3 is contacted with the concave surface of the groove of the lower valve body 2. And then the rupture disk 4 is placed on the sealing plate 3, the convex surface of the rupture disk 4 faces upwards, and the convex surface of the rupture disk contacts with the upper surface of the sealing plate 3 along the lower surface of the circumferential annular plane. And a pressing ring 5 is placed in a groove of the lower valve body 2, and the lower surface of the annular surface of the pressing ring 5 is in contact with the upper surface of the convex surface of the rupture disk 4 along the circumferential annular plane. Finally, the upper valve body 1 is screwed into the groove of the lower valve body 2, and the upper valve body 1 and the lower valve body 2 are fastened together through threads. A seal ring 6 is fitted into the lower end annular groove of the lower valve body 2. The overvoltage protection device is assembled, and the assembled overvoltage protection device is connected with the installation threaded hole of the overvoltage protection device reserved on the wheel hub through the threads at the lower end of the lower valve body 2. When the airplane wheel is inflated in a proper amount, the overpressure protection device enables the tire to be used normally without air leakage through the sealing of the sealing ring and the rupture disk. When the airplane wheel is inflated to overpressure, the rupture disk in the overpressure protection device is ruptured because the air pressure exceeds the strength of the material, the pressure of the tire of the airplane wheel is released, the tire of the airplane wheel is protected from being burst, and the safety of the airplane wheel is improved.

The utility model provides an overvoltage protector is a valve body structure of installing on aircraft wheel hub, can automatic release tire interior high-pressure gas when tire inflation pressure is too high to prevent that the tire from blasting because of the excessive pressure, guarantee product safe handling. The main technical index of the overpressure protection device is the opening pressure of the rupture disk, namely the bursting pressure of the rupture disk. The burst pressure is too low, so that the tire pressure of the airplane wheel tire is released in the normal use process, and the normal use of the airplane wheel is influenced; the effect of overpressure protection cannot be achieved due to the fact that the bursting pressure is too high.

The utility model provides an overvoltage protector both can prevent the tire excessive pressure blasting that the high temperature leads to, also can prevent the tire excessive pressure blasting that leads to because of the mistake of operation (such as the error when aerifing). Therefore, the overpressure protection valve can prevent tire explosion to the maximum extent, and safety of personnel and equipment is improved. The aircraft wheel provided with the overvoltage protection device has the advantages that the reliability and the safety are greatly improved.

The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. In addition, the detailed parts of the utility model are the conventional technology.

Claims

1. An overvoltage protection device for an aircraft wheel, comprising: the upper valve body is of a hollow cylinder structure, the hollow part is an exhaust pipeline for releasing air pressure when the tire of the airplane is in overpressure, the upper end of the upper valve body is of a closed structure, and circular holes are formed in the upper end of the upper valve body in a radial direction and are perpendicular to each other and communicated with the exhaust pipeline of the upper valve body, and are used for discharging gas from the upper valve body when the tire is overloaded or the inflation pressure is over-inflated; the upper end of the lower valve body is of a groove-shaped hollow structure, the lower end of the lower valve body is connected with the wheel hub, the lower end of the lower valve body is provided with an exhaust pipeline, the exhaust pipeline penetrates through the concave surface of the concave groove of the lower valve body from the lower surface of the lower valve body, and the exhaust pipeline of the lower valve body is coaxial with the exhaust pipeline of the upper valve body; the rupture disk is positioned between the exhaust pipelines of the upper valve body and the lower valve body.

2. The device of claim 1, wherein the rupture disk is a male burst disk.

3. The device of claim 2, wherein the rupture disc is made of a nickel-based alloy and has a thickness of 0.2mm.

4. The device of claim 1, wherein a cushion seal is disposed between the rupture disk and the upper valve body.

5. The device of claim 4, wherein the buffer sealing ring is a compression ring, and the compression ring is of an intermediate ring structure.

6. The apparatus of claim 1, further comprising: and the sealing sheet is positioned between the rupture disk and the lower valve body and is a hollow annular sheet.

7. The device of claim 1, wherein the outer diameter of the lower end of the upper valve body is provided with threads, and the inner diameter of the groove at the upper end of the lower valve body is provided with threads.

8. The apparatus of claim 1 wherein the lower end of the lower valve body is threaded for connection to the wheel hub.