Anti-overflow oil valve of helicopter oil tank

Abstract

The utility model discloses a helicopter oil tank anti-overflow oil valve, which comprises an upper shell, a steel ball, a steel ball seat, a sealing ring, a valve assembly, a spring, a lower shell, an outer sleeve nut, a steel ball and a slotting conical end set screw, the upper shell, the lower shell, the steel ball seat and a valve are all revolving bodies, the sealing ring is arranged in the valve assembly, the valve assembly is arranged below the steel ball seat, and the spring is arranged on the outer sleeve nut. According to the oil overflow prevention valve of the helicopter oil tank, the steel ball is applied to the valve assembly by means of gravity when inclining along with an airplane, so that the spring is compressed to achieve opening and closing of the valve, and the effect of preventing fuel oil in the oil tank from overflowing is achieved. And the functions of normal oil filling, oil consumption and oil spill prevention during rollover can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid seal technical field, concretely relates to a kind of anti-overflow oil valves for preventing fuel in oil tank from overflowing outside through breather line when helicopter rolls over. BACKGROUND

[0002] At present, anti-overflow oil valve is widely used in aircraft fuel system, gas in oil tank is discharged when oil tank is filled, most anti-overflow oil valves can meet when aircraft is inverted, but anti-overflow oil function under multiple postures in rolling process still needs anti-overflow oil valve to accurately control rolling angle, so the structure of anti-overflow oil valve is designed according to angle in aircraft rolling process, to realize anti-overflow oil function under specific angle. SUMMARY

[0003] The utility model discloses a kind of anti-overflow oil valves for preventing fuel in oil tank from overflowing outside through breather line when helicopter rolls over, the opening and closing of valve are controlled by steel ball gravity and spring elastic force, make valve close when helicopter rolls over, it reaches the effect of preventing fuel in oil tank from overflowing, with Simple structure, light weight, high space utilization, function is remarkable etc.

[0004] The utility model technical solution: a kind of anti-overflow oil valves for preventing fuel in oil tank from overflowing outside through breather line when helicopter rolls over, including upper shell, lower shell and valve assembly, the upper shell is connected with lower shell screw thread, and sealing ring is arranged between the upper shell and lower shell to realize external sealing;Valve assembly is placed in lower shell, spring is equipped below valve assembly, and valve assembly and spring are installed in lower shell, upper chamber is formed between the upper shell and the lower shell, and lower chamber is formed between the lower shell and the lower shell, the upper shell, lower shell, steel ball seat, valve assembly are all rotary bodies;Guiding hole is equipped in the middle of steel ball seat, cylindrical guide is equipped on the top of valve assembly, the cylindrical guide can contact steel ball by passing through guiding hole, the steel ball seat includes steel ball seat upper part and steel ball seat lower part, the steel ball seat upper part is in bowl-shaped structure, the steel ball is placed in the steel ball seat upper part, flange is equipped at the bottom of steel ball seat lower part, and waist-shaped hole structure flow channel is also equipped in steel ball seat lower part, avoiding guiding hole and flange, the flow channel is communicated with upper chamber and lower chamber;Outer sleeve nut is connected to the outer side of the bottom of lower shell by steel ball, recess one is equipped on the outer side of the bottom of lower shell, recess two is equipped on the inner wall of outer sleeve nut and is matched with recess one to place steel ball, hole is vertically equipped on the lateral wall of outer sleeve nut and recess, and slotted conical end set screw is also equipped and matched with hole. By placing valve assembly under steel ball seat, steel ball is applied on valve assembly by gravity when aircraft is inclined, to compress spring to realize the opening and closing of valve, to prevent fuel in oil tank from overflowing.

[0005] Further, the valve assembly further comprises a large-diameter section of the top pressure spring, a side wall of the large-diameter section is provided with an annular circular hole, a top of the large-diameter section is provided with a sealing groove, the sealing groove is provided with FM-2D rubber sealing bonding, the sealing groove is matched and sealed with the flange, and further matched and sealed with the steel ball seat.

[0006] Further, the flow channel is uniformly provided with three.

[0007] Further, the upper shell and the lower shell are threadedly connected, and the external sealing is sealed by two sealing rings.

[0008] Further, the sleeve nut can be radially rotated by the steel balls.

[0009] Further, after the sleeve nut and the lower shell are connected through the steel balls, the slotted conical end set screw is used to block the opening.

[0010] The steel ball type anti-overflow oil valve has the advantages that the valve assembly is arranged under the steel ball seat, the steel ball is applied to the valve assembly by gravity when the airplane is inclined, the spring is compressed to realize the opening and closing of the valve, the effect of preventing fuel overflow of the fuel tank is achieved, the structure is simple, the weight is light, the space utilization rate is high, the function is remarkable, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0011] The drawings incorporated into the description and forming a part of the description show embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained from the drawings by those skilled in the art without creative labor. In the drawings:

[0012] Figure 1 The drawings show the structure of the anti-overflow oil valve of the fuel tank of the helicopter provided by the present application;

[0013] Figure 2 The drawings show the structure of the anti-overflow oil valve of the fuel tank of the helicopter provided by the present application;

[0014] Figure 3 The drawings show the structure of the anti-overflow oil valve of the fuel tank of the helicopter provided by the present application;

[0015] DRAWINGS

[0016] Upper shell, 11 - upper cavity

[0017] Lower shell, 21 - lower cavity, 22 - groove one

[0018] Valve assembly, 31 - cylindrical guide, 32 - large diameter section, 321 - annular circular hole, 322 - sealing groove

[0019] Sealing ring

[0020] Spring

[0021] Steel ball seat, 61 - upper part of steel ball seat, 62 - lower part of steel ball seat, 63 - guide hole, 621 - flange, 622 - flow channel

[0022] Steel ball

[0023] Nut, 81 - second groove, 82 - hole, 83 - slotted taper end set screw

[0024] Steel ball. DETAILED DESCRIPTION

[0025] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art.

[0026] Reference will now be made to Figures 1-3 The utility model will be described in further detail below through specific examples and in conjunction with the drawings.

[0027] Figure 1The utility model provides a helicopter oil tank anti -overflow valve structure schematic diagram, including upper casing 1, lower casing 2 and valve assembly 3, upper casing 1 is connected with lower casing 2 by screw thread, and two sealing rings 4 are equipped between upper casing 1 and lower casing 2 and realize external sealing;Valve assembly 3 is placed in lower casing 2, and spring 5 is equipped below valve assembly 3, steel ball seat 6 is equipped above valve assembly 3, steel ball 7 is installed above steel ball seat 6, steel ball seat 6 is pressed on lower casing 2 through upper casing 1, and upper cavity 11 is formed between steel ball seat 6 and upper casing 1, and lower cavity 21 is formed between steel ball seat 6 and lower casing 2, and upper casing 1, lower casing 2, steel ball seat 6, valve assembly 3 are all rotary bodies;Guiding hole 63 is equipped in the middle of steel ball seat 6, and cylindrical guide 31 is equipped at the top of valve assembly 3, and cylindrical guide 31 can contact steel ball 7 by passing through guiding hole 63, and steel ball seat 6 includes steel ball seat upper part 61 and steel ball seat lower part 62, steel ball seat upper part 61 is bowl-shaped structure, and steel ball 7 is placed in steel ball seat upper part 61, and flange 621 is equipped at the bottom of steel ball seat lower part 62, and flow channel 622 is also evenly equipped in steel ball seat lower part 62 by avoiding guiding hole 63 and flange 621, and flow channel 622 is communicated with upper cavity 11 and lower cavity 21;Outer sleeve nut 8 is connected with the outside of the bottom of lower casing 2 through steel ball 9, recess one 22 is equipped on the outside of the bottom of lower casing 2, recess two 81 is equipped on the inner wall of outer sleeve nut 8 and is matched with recess one 22 for placing several steel balls 9, and hole 82 is vertically equipped on the side wall of outer sleeve nut 8 along recess two 81, and slotted taper end set screw 83 is also equipped and is matched with hole 82.

[0028] Valve assembly 3 also includes large diameter section 32 of top pressure spring 5, and annular round hole 321 is equipped on the side wall of large diameter section 32, and sealing groove 322 is equipped at the top of large diameter section 32, and FM-2D glue material sealing adhesion is equipped in sealing groove 322, and sealing groove 322 is matched with flange 621 for sealing.

[0029] Upper casing 1 and lower casing 2 are connected by screw thread, and external sealing is realized by sealing ring 4 when connecting.

[0030] When working, the gravity of steel ball is applied to valve assembly 3 when the plane is flying, and valve assembly 3 compresses spring 5 to make flow channel 622 open, and the gas pressure in oil tank is no negative pressure;The plane can be smoothly refueled when refueling.

[0031] Figure 2 When the plane rolls over or the inclination angle is less than 25 DEG, the gravity component of steel ball 7 inclination is greater than the elastic force of spring 5, and flow channel 622 is still opened;When the inclination angle is greater than 25 DEG and less than 45 DEG, the gravity component of steel ball 7 inclination is less than the elastic force of spring 5, and valve assembly 3 moves upward under the action of spring force, and flow channel 622 starts to close.

[0032] Figure 3When the inclination angle is greater than 45°, the steel ball 7 is inclined to completely separate from the valve assembly 3, the spring force is far greater than the gravity of the valve assembly 3, and then the valve assembly 3 is pressed to seal the flow channel 622, and the oil spill prevention function is tested.

[0033] The above embodiments are only used to illustrate the technical solutions of the present application and are not limited. The modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art are included in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. An anti-slosh valve for a helicopter fuel tank, characterized by: The utility model provides a valve assembly and the lower shell of a kind of valve, it is including upper shell (1), lower shell (2) and valve assembly (3), the upper shell (1) is connected with lower shell (2) threadedly, and sealing ring (4) is arranged between the upper shell (1) and lower shell (2) and is used to realize external sealing;Valve assembly (3) is placed in lower shell (2), spring (5) is arranged below valve assembly (3), steel ball seat (6) is arranged above valve assembly (3), steel ball (7) is installed above steel ball seat (6), steel ball seat (6) is pressed on lower shell (2) by upper shell (1), upper cavity (11) is formed between steel ball seat (6) and upper shell (1), lower cavity (21) is formed between steel ball seat (6) and lower shell (2), the upper shell (1), lower shell (2), steel ball seat (6), valve assembly (3) are all rotary bodies;Guiding hole (63) is arranged in the middle of steel ball seat (6), cylindrical guide (31) is arranged on the top of valve assembly (3), cylindrical guide (31) can contact steel ball (7) by passing through guiding hole (63), steel ball seat (6) includes steel ball seat upper portion (61) and steel ball seat lower portion (62), steel ball seat upper portion (61) is in the form of bowl structure, steel ball (7) is placed in steel ball seat upper portion (61), flange (621) is arranged at the bottom end of steel ball seat lower portion (62), flow channel (622) is further arranged in steel ball seat lower portion (62) away from guiding hole (63) and flange (621), flow channel (622) is communicated with upper cavity (11) and lower cavity (21), outer sleeve nut (8) is connected to the outer side of the bottom end of lower shell (2) by steel ball (9), recess one (22) is arranged on the outer side of the bottom end of lower shell (2), recess two (81) is arranged on the inner wall of outer sleeve nut (8) and is matched with recess one (22) to place steel ball (9), hole (82) is arranged on the side wall of outer sleeve nut (8) perpendicularly to recess two (81) and radially, and slotted taper end set screw (83) is further arranged and matched with hole (82).

2. The anti-slosh valve for a helicopter fuel cell according to claim 1, characterized in that: Valve assembly (3) further includes large diameter section (32) of top pressing spring (5), annular round hole (321) is arranged on the side wall of large diameter section (32), sealing groove (322) is arranged on the top of large diameter section (32), FM-2D rubber seal adhesive is arranged in sealing groove (322), sealing groove (322) is matched with flange (621) to seal.

3. The anti-slosh valve for a helicopter fuel cell according to claim 1, wherein: Flow channel (622) is uniformly provided with three.

4. The anti-slosh valve for a helicopter fuel cell according to claim 1, wherein: Sealing ring (4) is provided with two.

5. The anti-slosh valve for a helicopter fuel cell according to claim 1, wherein: Steel ball (9) is provided with a plurality of.

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