A helicopter quick-release refueling seat with both refueling and ventilation functions

Abstract

A quick-release refueling seat for helicopters with both refueling and ventilation functions relates to a refueling seat. The air cylinder of the vent body is arranged under the upper cover plate and has a filter plug and a pressure plate inside. The outer wall of the air cylinder has a limiting boss, and the outer wall of the limiting boss has a vent hole and a spiral groove. The spiral groove is arranged obliquely and the lower end passes through the lower end surface of the limiting boss, and the upper end has a limiting slot. The refueling port body is connected to the air cylinder and the refueling port seat, the lower end of the inner cavity has a limiting cavity, the upper end of the outer wall is fixed with a limiting pin, the limiting pin and the spiral groove correspond one to one, and there is a spring and a spring pressure plate in the limiting cavity, the spring rests on the refueling port seat and the spring pressure plate, and the spring pressure plate rests on the top of the limiting cavity and cooperates with the air cylinder. The present invention realizes rapid rotation installation through the cooperation of the limiting pin and the spiral groove, and realizes the quick change function by applying axial force through the spring, thereby improving the disassembly efficiency, reducing the work intensity, and filling the gap in the industry.

Description

Technical Field

[0001] The invention relates to a refueling seat, in particular to a helicopter quick-release refueling seat with both refueling and ventilation functions. Background Art

[0002] During the refueling process of the helicopter's tail reducer in the field, the refueling cap and the refueling port are connected by threads, and it takes 7-8 turns to remove or install the refueling cap. In addition, the tail reducer is located in the helicopter's tail duct, and the space is small, which makes it inconvenient to remove and install the tail reducer's refueling port. Summary of the invention

[0003] In order to solve the problems existing in the background technology, the present invention provides a helicopter quick-release refueling seat with both refueling and ventilation functions.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a helicopter quick-release refueling seat with both refueling and ventilation functions, comprising a refueling port seat assembly and a vent assembly; the lower end of the refueling port seat assembly is threadedly connected to the helicopter tail reduction, and the upper end of the refueling port seat assembly and the lower end of the vent assembly are detachably fixedly connected by rotating and pressing.

[0005] Compared with the prior art, the present invention has the following beneficial effects:

[0006] The present invention realizes rapid rotation installation through the cooperation of the limit pin and the spiral groove, and realizes the quick-change function by applying axial force through the spring, thereby improving the disassembly efficiency and reducing the work intensity, filling the industry gap of the helicopter quick-release refueling seat with both refueling and ventilation functions; at the same time, a filter plug is provided to achieve air filtration and ventilation balance; a filter assembly is provided to effectively filter the oil added to the tail reducer, thereby ensuring safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the present invention;

[0008] Figure 2 is a schematic diagram of the structure of the fuel filler seat assembly;

[0009] Figure 3 is a schematic diagram of the structure of the vent assembly;

[0010] Figure 4 It is a schematic diagram of the structure of the breather;

[0011] Figure 5 It is a schematic diagram of the structure of the filter assembly. DETAILED DESCRIPTION

[0012] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0013] A quick-release refueling seat for a helicopter with both refueling and ventilation functions comprises a refueling port seat assembly 1 and a vent assembly 3; the lower end of the refueling port seat assembly 1 is threadedly connected to the helicopter tail reducer, and the upper end of the refueling port seat assembly 1 and the lower end of the vent assembly 3 are detachably fixedly connected by rotating and pressing.

[0014] The vent assembly 3 includes a vent body 15, a filter plug 16 and a pressing plate 19; the vent body 15 includes an upper cover plate 25 and a vent cylinder 26 formed in one piece, the vent cylinder 26 is coaxially arranged at the lower end of the upper cover plate 25, and the filter plug 16 and the pressing plate 19 are arranged inside the vent cylinder 26, the filter plug 16 is arranged at the upper end of the pressing plate 19, and the pressing plate 19 is fixedly connected to the lower end of the vent cylinder 26, and the filter plug 16 is selected from "soft polyurethane foam plastic" type IV (polyether type), which is the existing technology, mainly capable of filtering air and It prevents oil from flowing back and provides ventilation function at the same time, balancing the internal and external pressure difference in the fuel tank after the aircraft is refueled; the upper end of the outer wall of the breather 26 is provided with a coaxially arranged limit boss 27 along its circumference, and the upper end of the outer wall of the limit boss 27 passes through the inner cavity of the breather 26 and is evenly distributed with a plurality of ventilation holes 24 along its circumference; the lower end of the outer wall of the limit boss 27 is evenly distributed with a plurality of spiral grooves 23 along its circumference, each of the spiral grooves 23 is inclined, and the lower end of each spiral groove 23 passes through the lower end surface of the limit boss 27, and the upper end of each spiral groove 23 is provided with a limit slot.

[0015] A filter sheet 18 is further provided between the filter plug 16 and the pressure plate 19 , and the filter sheet 18 provides secondary filtration.

[0016] The outer side of the vent cylinder 26 is surrounded by a protective cover 17 by welding, and the protective cover 17 provides dust prevention and protection.

[0017] The fuel filler seat assembly 1 includes a fuel filler seat 9, a spring pressure plate 10, a limiting nail 11, a fuel filler body 12 and a spring 14; the upper end of the fuel filler body 12 is plugged into the lower end of the breather cylinder 26, the lower end of the fuel filler body 12 is threadedly connected to the upper end of the fuel filler seat 9, the upper end of the outer wall of the fuel filler body 12 is fixedly connected to a plurality of limiting nails 11 along its circumference, the plurality of limiting nails 11 are arranged one-to-one with a plurality of spiral grooves 23, a limiting cavity is provided at the lower end of the inner cavity of the fuel filler body 12, a spring 14 and a spring pressure plate 10 are arranged in the limiting cavity, the lower end of the spring 14 abuts on the fuel filler seat 9, the upper end of the spring 14 abuts on the spring pressure plate 10, the spring pressure plate 10 abuts on the top of the limiting cavity, and the spring pressure plate 10 is matched with the lower end of the breather cylinder 26.

[0018] The cooperation between the limiting pin 11 and the spiral groove 23 enables rapid rotation installation, and the axial force is applied by the spring 14 to achieve the quick change function.

[0019] A sealing ring 2 is provided between the oil filling port body 12 and the breather tube 26 to ensure that there will be no oil leakage during use.

[0020] The fuel filler body 12 and the fuel filler seat 9 are also connected and fixed by a fuse 13 to ensure that there is no radial movement between the fuel filler body 12 and the fuel filler seat 9 during use, making the installation more stable.

[0021] A chain 6 is also provided between the vent assembly 3 and the fuel filler seat assembly 1 to prevent the vent assembly 3 from falling and / or being lost during disassembly. Chain links 5 are provided at both ends of the chain 6. The chain link 5 at one end is connected to the upper cover plate of the vent assembly 3 through the upper pin 4, and the chain link 5 at the other end is connected to the fuel filler body 12 through the lower pin 7.

[0022] The fuel filler seat assembly 1 is further provided with a filter assembly 8, through which the oil is filtered again.

[0023] The filter assembly 8 includes a filter seat 20 and a filter 22; the filter seat 20 is placed on the spring pressure plate 10, and the upper end of the filter seat 20 is contacted and matched with the lower end of the breather cylinder 26, the lower end of the filter seat 20 is fixedly connected to the filter 22 by welding, and the filter 22 is set in the fuel filler seat 9 after passing through the spring 14.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A helicopter quick-release refueling seat with both refueling and ventilation functions, characterized in that: The invention comprises a fuel filler seat assembly (1) and a vent assembly (3); the lower end of the fuel filler seat assembly (1) is threadedly connected to the tail reducer of a helicopter, and the upper end of the fuel filler seat assembly (1) is detachably fixedly connected to the lower end of the vent assembly (3) by means of rotation and pressing; the vent assembly (3) comprises a vent body (15), a filter plug (16) and a pressure plate (19); the vent body (15) comprises an upper cover plate (25) and a vent cylinder (26) which are integrally formed, and the vent cylinder (26) is coaxially arranged at the lower end of the upper cover plate (25). The vent cylinder (26) has a filter plug (16) and a pressure plate (19) disposed inside the vent cylinder (26). The filter plug (16) is disposed at the upper end of the pressure plate (19). The pressure plate (19) is fixedly connected to the lower end of the vent cylinder (26). The upper end of the outer wall of the vent cylinder (26) is provided with a coaxially arranged limiting boss (27). The upper end of the outer wall of the limiting boss (27) is provided with a plurality of vent holes (24). The lower end of the outer wall of the limiting boss (27) is provided with a plurality of spiral grooves (23). Each of the spiral grooves (23) is inclined, and each spiral groove (23) is inclined. ) are all arranged on the lower end surface of the limiting boss (27), and the upper end of each spiral groove (23) is provided with a limiting slot; the fuel filler seat assembly (1) comprises a fuel filler seat (9), a spring pressure plate (10), a limiting pin (11), a fuel filler body (12) and a spring (14); the upper end of the fuel filler body (12) is plugged into the lower end of the breather cylinder (26), the lower end of the fuel filler body (12) is threadedly connected to the upper end of the fuel filler seat (9), the upper end of the outer wall of the fuel filler body (12) is fixedly connected to a plurality of limiting pins (11), and the plurality of limiting pins (11) are arranged one by one corresponding to the plurality of spiral grooves (23), a limiting cavity is arranged at the lower end of the inner cavity of the fuel filler body (12), a spring (14) and a spring pressure plate (10) are arranged in the limiting cavity, the lower end of the spring (14) abuts against the fuel filler seat (9), the upper end of the spring (14) abuts against the spring pressure plate (10), the spring pressure plate (10) abuts against the top of the limiting cavity, and the spring pressure plate (10) is arranged in cooperation with the lower end of the breather cylinder (26); the outer side of the breather cylinder (26) is ring-fitted with a protective cover (17) by welding.

2. A helicopter quick-release refueling seat with both refueling and ventilation functions according to claim 1, characterized in that: A filter sheet (18) is also provided between the filter plug (16) and the pressure plate (19).

3. A helicopter quick-release refueling seat with both refueling and ventilation functions according to claim 2, characterized in that: A sealing ring (2) is provided between the fuel filler port body (12) and the breather cylinder (26).

4. A helicopter quick-release refueling seat with both refueling and ventilation functions according to claim 3, characterized in that: The fuel filler body (12) and the fuel filler seat (9) are also connected and fixed via a fuse (13).

5. A helicopter quick-release refueling seat with both refueling and ventilation functions according to claim 1 or 4, characterized in that: A chain (6) is also provided between the vent assembly (3) and the fuel filler seat assembly (1).

6. A helicopter quick-release refueling seat with both refueling and ventilation functions according to claim 5, characterized in that: A filter assembly (8) is also provided in the fuel filler seat assembly (1).

7. A helicopter quick-release refueling seat with both refueling and ventilation functions according to claim 6, characterized in that: The filter assembly (8) comprises a filter seat (20) and a filter (22); the filter seat (20) is placed on the spring pressure plate (10), and the upper end of the filter seat (20) is contacted and matched with the lower end of the breather cylinder (26), the lower end of the filter seat (20) is fixedly connected to the filter (22), and the filter (22) is arranged in the fuel filler seat (9) after passing through the spring (14).

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