Installation sealing structure of aviation brake device

Abstract

The utility model relates to the technical field of aviation brake devices, in particular to an installation sealing structure of an aviation brake device, which comprises a hydraulic pipe connecting nozzle, a cylinder body and a sealing ring, the hydraulic pipe connecting nozzle is installed on the cylinder body through threads and communicated with an inner cavity of the cylinder body, and the sealing ring is arranged between the hydraulic pipe connecting nozzle and the cylinder body. The threads for connecting the hydraulic pipe connecting nozzle and the cylinder body are MJ threads, the connecting precision and stability are high, the sealing ring is located on the side, close to an inner cavity of the cylinder body, of the thread connecting position, and on the basis that the sealing effect is achieved, even if metal filings are generated through thread screwing, the sealing ring can block the metal filings and prevent the metal filings from entering oil liquid; due to the fact that the tooth bottom of the MJ thread is the continuous smooth curve, metal chips can be reduced when the thread is screwed, the sealing ring is arranged on the side, close to the inner cavity of the cylinder body, of the thread connecting position, on the basis that the sealing function is achieved, the metal chips can be prevented from falling into the inner cavity of the cylinder body and entering oil liquid, and the situation that the metal chips enter the oil liquid to cause faults of a brake device is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation brake devices, in particular to an installation sealing structure of an aviation brake device. Background Art

[0002] At present, the cylinder body of aircraft brake devices is mostly made of aluminum alloy. The hydraulic piston chamber of the cylinder body and the on-board oil pipeline are interconnected through a hydraulic pipe nozzle made of steel material. The hydraulic pipe nozzle made of steel material is connected to the cylinder body made of aluminum alloy through a threaded connection. The pipe nozzle and the cylinder body are sealed by a sealing ring. The sealing ring is located above the threaded connection. Due to the difference in hardness of the two parts, metal chips are generated during the screwing process. The metal chips can easily enter the cylinder piston chamber. In the process of continuously inputting and releasing pressure of the brake device, the metal chips may enter the valve body at the upper end of the brake device through the oil hole of the pipe nozzle along with the oil, causing the valve body to get stuck, thereby affecting the input pressure. In severe cases, it may cause the brake device to malfunction. Utility Model Content

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides an installation sealing structure for an aviation brake device.

[0004] The utility model discloses the following technical solution: an installation sealing structure for an aviation brake device, comprising a hydraulic pipe nozzle, a cylinder body and a sealing ring, wherein the hydraulic pipe nozzle is installed on the cylinder body through a thread and communicates with the inner cavity of the cylinder body, a sealing ring is provided between the hydraulic pipe nozzle and the cylinder body, the thread connecting the hydraulic pipe nozzle and the cylinder body is an MJ thread, and the sealing ring is located on the side of the threaded connection close to the inner cavity of the cylinder body.

[0005] Furthermore, a protective ring is provided below the sealing ring and is in close contact with the sealing ring.

[0006] Furthermore, the diameter of the threaded hole at the MJ threaded connection of the cylinder body is larger than the diameter of the through hole at the installation sealing ring.

[0007] Furthermore, a protective cap is provided outside the hydraulic pipe nozzle, and a gasket is provided between the protective cap and the hydraulic pipe nozzle.

[0008] Furthermore, a fuse is provided between the hydraulic pipe nozzle and the cylinder body.

[0009] Beneficial effect: Compared with the prior art, the installation sealing structure of the aviation brake device of the utility model greatly reduces the metal chips generated when the threads are screwed together and effectively prevents the metal chips from falling into the cavity of the cylinder body by setting an MJ thread to connect the hydraulic pipe nozzle and the cylinder body, and installing the sealing ring below the MJ thread connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a structural diagram of the utility model;

[0011] Figure 2 for Figure 1 AA cross-sectional view;

[0012] In the figure: 1- hydraulic pipe nozzle, 2- cylinder body, 3- sealing ring, 4- protection ring, 5- protection cap, 6- gasket, 7- fuse. DETAILED DESCRIPTION

[0013] like Figures 1 to 2 As shown, an installation sealing structure for an aircraft brake device includes a hydraulic pipe nipple 1, a cylinder body 2, and a sealing ring 3. The hydraulic pipe nipple 1 is threadedly mounted on the cylinder body 2 and communicates with the inner cavity of the cylinder body 2. The sealing ring 3 is provided between the hydraulic pipe nipple 1 and the cylinder body 2. The thread connecting the hydraulic pipe nipple 1 and the cylinder body 2 is an MJ thread. Because the root of the MJ thread is a continuous and smooth curve, it is not easy to generate metal chips and has high connection accuracy and stability. The sealing ring 3 is located on the side of the threaded connection close to the inner cavity of the cylinder body 2. On the basis of achieving a sealing effect, even if metal chips are generated by screwing the threads together, the sealing ring 3 can block the metal chips and prevent them from entering the oil.

[0014] A protective ring 4 is also provided under the sealing ring 3, which is in close contact with the sealing ring 3 to prevent the sealing ring 3 from falling into the cylinder body 2; the diameter of the threaded hole at the threaded connection of the cylinder body 2 is larger than the diameter of the through hole at the installation of the sealing ring 3, so that a step is formed at the threaded hole to prevent metal chips from entering the cylinder body 2; a protective cap 5 is also provided on the outside of the hydraulic pipe nozzle 1, and a gasket 6 is provided between the protective cap 5 and the hydraulic pipe nozzle 1. The gasket 6 can ensure that the protective cap 5 is installed and tightened. When the hydraulic pipe nozzle 1 is not connected to an external device, the protective cap 5 can prevent foreign matter from entering the cylinder body 2 through the hydraulic pipe nozzle 1; a fuse 7 is provided between the hydraulic pipe nozzle 1 and the cylinder body 2, which can prevent the pipe nozzle from being lost when the hydraulic pipe nozzle 1 needs to be removed to connect other equipment to the cylinder body 2.

[0015] The hydraulic pipe nozzle 1 is connected to the cylinder body 2 through an MJ thread. Since the MJ thread has higher precision and stability than ordinary threads, and the bottom of the MJ thread is a continuous and smooth curve, the generation of metal chips can be reduced when the threads are screwed together. The sealing ring 3 is arranged on the side of the threaded connection close to the inner cavity of the cylinder body 2. On the basis of having a sealing function, it can prevent metal chips from falling into the inner cavity of the cylinder body 2 and entering the oil, effectively avoiding metal chips entering the oil and causing brake device failure; this structure is also applicable to other hydraulic connection components on the brake device, such as actuating components and pistons.

[0016] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An installation sealing structure for an aircraft brake device, comprising a hydraulic pipe nozzle (1), a cylinder body (2) and a sealing ring (3), wherein the hydraulic pipe nozzle (1) is installed on the cylinder body (2) through a thread and communicates with the inner cavity of the cylinder body (2), and a sealing ring (3) is provided between the hydraulic pipe nozzle (1) and the cylinder body (2), characterized in that: The thread connecting the hydraulic pipe nozzle (1) and the cylinder body (2) is an MJ thread, and the sealing ring (3) is located on one side of the threaded connection close to the inner cavity of the cylinder body (2).

2. The mounting and sealing structure for an aircraft brake device according to claim 1, wherein: A protective ring (4) is also provided below the sealing ring (3) and is in close contact with the sealing ring (3).

3. The mounting and sealing structure for an aircraft brake device according to claim 1, wherein: The diameter of the threaded hole at the MJ threaded connection of the cylinder body (2) is larger than the diameter of the through hole at the installation sealing ring (3).

4. The mounting and sealing structure for an aircraft brake device according to claim 1, wherein: A protective cap (5) is further provided outside the hydraulic pipe nozzle (1), and a gasket (6) is provided between the protective cap (5) and the hydraulic pipe nozzle (1).

5. The mounting and sealing structure for an aircraft brake device according to claim 1, wherein: A fuse (7) is provided between the hydraulic connection nozzle (1) and the cylinder body (2).

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