A fire resistant and quick sealing fuel dispenser

Abstract

The utility model relates to aviation fuel system technical field relates to a fire -resistant and quick sealing fuel distributor. Including import shell, main oil way valve, vice oil way valve, vice oil way spring, vice oil way plug, adjusting washer A, sealing ring A, main oil way spring, sealing ring B, adjusting washer B, oil drain hole shell, screw, fastening washer, vulcanized rubber, locking silk, fuel distributor guarantees the opening of main oil way and vice oil way through double -slide valve nest and spring matching, guarantees the smooth opening of product initial opening without fluctuation through the soft start groove on main oil way, guarantees the quick closing of oil drain hole after the opening of product main oil way through the reasonable design of the shape of main oil way valve, reduces the fuel leakage amount in the opening process compared with the common state of engine, through the integrated design of each oil port of product and import shell, reduces the weight and structural complexity of product, reduces the number of external sealing position of product simultaneously, improves the anti -leakage and fire -resistant capacity of product.

Description

Technical Field

[0001] This utility model relates to the field of aviation fuel system technology, and to a fire-resistant and fast-sealing fuel distributor. Background Technology

[0002] Due to airworthiness and actual engine requirements, the fire resistance of fuel distributors is urgently needed, especially for low-flow engines which cannot use fuel to carry away heat, thus requiring even higher fire resistance. Because of the low flow rate, engines operate in a low-pressure, low-flow state for extended periods, and leakage at the drain port reduces fuel supply efficiency. To solve the problem of drain port leakage during low-pressure operation, it is necessary to reduce the drain port closing pressure.

[0003] Currently, fuel distributors are mostly irregularly shaped structures with multiple seals, poor fire resistance, and high pressure when closing the drain port. Utility Model Content

[0004] Utility Model Purpose To reduce the sealing pressure at the oil leak point, minimize leakage, and improve the product's fire resistance, a fire-resistant and fast-sealing fuel distributor was designed.

[0005] Technical solution A fire-resistant and fast-sealing fuel distributor includes an inlet housing, a main fuel line valve, a secondary fuel line valve, a secondary fuel line spring, a secondary fuel line plug, an adjusting washer A, a sealing ring A, a main fuel line spring, a sealing ring B, an adjusting washer B, a drain port housing, screws, fastening washers, vulcanized rubber, and locking screws. The vulcanized rubber is vulcanized on the drain port housing to form a drain port housing assembly. The sealing ring A is disposed on the secondary fuel line plug. The secondary fuel line valve, secondary fuel line spring, adjusting washer, and secondary fuel line plug are sequentially installed into the main fuel line valve to form a main fuel line valve assembly. The sealing ring B is disposed on the drain port housing assembly. The main fuel line valve assembly, main fuel line spring, adjusting washer B, and drain port housing assembly are sequentially installed into the inlet housing and fastened with screws and locked with locking screws. The inlet housing is equipped with an oil inlet, a main oil passage, and a secondary oil passage. Oil enters from the oil inlet and pushes the main oil passage valve assembly to move, connecting the main oil passage. As the oil pressure continues to rise, it pushes the main oil passage valve assembly to move further until the protrusion on the main oil passage valve contacts and seals with the vulcanized rubber on the drain port housing assembly, thus closing the drain port on the drain port housing assembly. As the oil pressure continues to rise, it pushes the secondary oil passage valve to move, connecting with the secondary oil passage through the through hole on the secondary oil passage valve.

[0006] Furthermore, there are several through holes, evenly distributed on the auxiliary oil passage valve.

[0007] Furthermore, when the pressure at the oil inlet is released, the auxiliary oil circuit spring pushes the auxiliary oil circuit valve to reset, and the main oil circuit spring pushes the main oil circuit valve to reset.

[0008] Furthermore, it also includes a fireproof cover, which is disposed outside the oil drain port housing assembly.

[0009] Furthermore, it also includes a rubber ring A, which is disposed outside the inlet housing and used to fix it to the engine.

[0010] Furthermore, it also includes a rubber ring B, which is disposed outside the drain port housing assembly and is used to fix it to the engine.

[0011] Furthermore, the main oil circuit valve is provided with evenly distributed slits, and the amount of movement required to open the main oil circuit is controlled by the length of the slits, while ensuring the guide length.

[0012] Furthermore, the main oil circuit valve is provided with a pressure relief hole to prevent the formation of a dead space after the auxiliary oil circuit valve is opened.

[0013] The beneficial effects of this application are as follows: A structural schematic diagram of a fire-resistant and fast-sealing fuel distributor is presented. Designing a fire-resistant and fast-sealing fuel distributor is necessary to improve the product's fire resistance and reduce the closing pressure of the drain port.

[0014] The fuel distributor utilizes nested dual spool valves and spring matching to ensure the opening of the main and auxiliary fuel lines. A soft-start groove on the main fuel line ensures smooth, uninterrupted initial opening. A well-designed main fuel line valve ensures rapid closure of the drain port after opening, reducing fuel leakage compared to normal engine operation. The integrated design of all fuel ports and the inlet housing reduces weight and structural complexity, while also minimizing external sealing points, thus improving leak prevention and fire resistance. A fireproof cover further enhances the product's fire resistance by protecting the external sealing points. Attached Figure Description

[0015] Figure 1 This is a structural sectional view; Figure 2 This is a schematic diagram of the structure. Figure 3 Schematic diagram of the main oil passage annular groove; Figure 4 This is a schematic diagram of the through hole in the auxiliary oil passage annular groove.

[0016] Wherein: 1-Inlet housing; 2-Main oil circuit valve; 3-Auxiliary oil circuit valve; 4-Auxiliary oil circuit spring; 5-Auxiliary oil circuit block; 6-Adjusting washer; 7-Sealing ring; 8-Main oil circuit spring; 9-Sealing ring; 10-Adjusting washer; 11-Drain port housing assembly; 12-Screw; 13-Washer; 14-Rubber ring; 15-Fireproof cover; 16-Rubber ring; 17-Vulcanized rubber; 18-Locking screw. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.

[0018] The utility model features of this utility model are: The core utility model features a rationally designed product structure, making the product a single unit. The oil inlet, main oil circuit, and auxiliary oil circuit are all located on the inlet shell, with only one external seal. A fireproof cover is installed at the seal location, which doubles the fire resistance.

[0019] Secondary utility model point 1: The mechanism between the main oil circuit valve and the inlet housing, and between the main oil circuit valve and the drain port assembly is reasonably designed to ensure that the drain port closes quickly after the main oil circuit is fully opened, thereby reducing leakage and lowering the minimum pressure relief. Secondary utility model point 2: The fitting clearance and length between the auxiliary oil circuit valve and the main oil circuit valve, and the fitting clearance and length between the main oil circuit valve and the inlet housing are reasonably designed to ensure that the leakage and oil cross-flow are reduced before the main oil circuit and auxiliary oil circuit are opened. Secondary utility model point 3: The main oil circuit valve is milled with four squares to ensure the flow channel area and the motion guidance. Secondary utility model point 4: A flow outlet is set on the main oil circuit valve to make the product more stable when opening and prevent pressure instability at the moment of opening. Secondary utility model point 5: Clamp fixing positions are set on the inlet shell and the oil outlet shell respectively to enhance the structural stability of the product after installation; Secondary utility model point 6: A limiting structure is set on the auxiliary oil circuit valve and the auxiliary oil circuit blockage to prevent the product from springing and coiling under high pressure, thereby improving the product life.

[0020] Secondary utility model point 7: A pressure relief hole is provided on the main oil circuit valve assembly to prevent the formation of a dead cavity after the auxiliary oil circuit is opened.

[0021] Secondary utility model point 8: The clearance between the main oil circuit valve and the inlet housing is reasonably set to ensure dual guidance of the product.

[0022] Example A fire-resistant and fast-sealing fuel distributor includes: 1-inlet housing; 2-main oil circuit valve; 3-auxiliary oil circuit valve; 4-auxiliary oil circuit spring; 5-auxiliary oil circuit plug; 6-adjusting washer A; 7-sealing ring A; 8-main oil circuit spring; 9-sealing ring B; 10-adjusting washer B; 11-drain port housing; 12-screw; 13-fastening washer; 17-vulcanized rubber; 18-locking screw; The vulcanized rubber 17 is vulcanized on the drain port housing 11 to form the drain port housing assembly; the sealing ring A is set on the auxiliary oil passage plug 5, and the auxiliary oil passage valve 3, auxiliary oil passage spring 4, adjusting washer 6, and auxiliary oil passage plug 5 are sequentially installed into the main oil passage valve 2 to form the main oil passage valve assembly; the sealing ring B is set on the drain port housing assembly 11, and the main oil passage valve assembly, main oil passage spring 8, adjusting washer B10, and drain port housing assembly 11 are sequentially installed into the inlet housing and fastened with screws and locked with locking screw 18.

[0023] The inlet housing 1 is provided with an oil inlet, a main oil passage, and a secondary oil passage. Oil enters from the oil inlet and pushes the main oil passage valve assembly to move, connecting the main oil passage. As the oil pressure continues to rise, it pushes the main oil passage valve assembly to move further until the protrusion on the main oil passage valve contacts and seals with the vulcanized rubber on the drain port housing assembly 11, thus closing the drain port on the drain port housing assembly 11. As the oil pressure continues to rise, it pushes the secondary oil passage valve 3 to move, connecting with the secondary oil passage through the through hole on the secondary oil passage valve 3.

[0024] Furthermore, there are several through holes, evenly distributed on the auxiliary oil passage valve 3.

[0025] Furthermore, when the pressure at the oil inlet is released, the auxiliary oil circuit spring 4 pushes the auxiliary oil circuit valve 3 to reset, and the main oil circuit spring 8 pushes the main oil circuit valve 2 to reset.

[0026] Furthermore, it also includes a fireproof cover 15, which is disposed outside the oil drain housing assembly 11.

[0027] Furthermore, it also includes a rubber ring A14, which is disposed outside the inlet housing 1 and is used to fix it to the engine.

[0028] Furthermore, it also includes a rubber ring B16, which is disposed outside the drain port housing assembly 11 for fixing to the engine.

[0029] Furthermore, the main oil circuit valve 2 is provided with evenly distributed scissor edges, and the amount of movement required to open the main oil circuit is controlled by the length of the scissor edges, while ensuring the guide length.

[0030] Furthermore, the main oil circuit valve 2 is provided with a pressure relief hole to prevent the formation of a dead space after the auxiliary oil circuit valve is opened.

[0031] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0032] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0033] The above description is merely a specific embodiment of this utility model and is not intended to limit this utility model. Within the spirit and principles of this utility model, any person skilled in the art may use the above-disclosed technical content to make changes or modifications to equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model, as well as any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.

Claims

1. A fire-resistant and fast-sealing fuel dispenser, characterized in that, The assembly includes an inlet housing, a main oil circuit valve, an auxiliary oil circuit valve, an auxiliary oil circuit spring, an auxiliary oil circuit plug, adjusting washer A, sealing ring A, a main oil circuit spring, sealing ring B, adjusting washer B, a drain port housing, screws, fastening washers, vulcanized rubber, and locking screws. The vulcanized rubber is vulcanized onto the drain port housing to form a drain port housing assembly. Sealing ring A is placed on the auxiliary oil circuit plug. The auxiliary oil circuit valve, auxiliary oil circuit spring, adjusting washer, and auxiliary oil circuit plug are sequentially installed into the main oil circuit valve to form a main oil circuit valve assembly. Sealing ring B is placed on the drain port housing assembly. The main oil circuit valve assembly and main oil circuit spring are then installed together. Adjusting washer B and drain port housing assembly are sequentially installed into the inlet housing and secured with screws and locking screws. The inlet housing is equipped with an oil inlet, a main oil passage, and a secondary oil passage. Oil enters from the oil inlet and pushes the main oil passage valve assembly to move, connecting the main oil passage. As the oil pressure continues to rise, it pushes the main oil passage valve assembly to move further until the protrusion on the main oil passage valve contacts and seals with the vulcanized rubber on the drain port housing assembly, thus closing the drain port on the drain port housing assembly. As the oil pressure continues to rise, it pushes the secondary oil passage valve to move, connecting with the secondary oil passage through the through hole on the secondary oil passage valve.

2. The dispenser as claimed in claim 1, characterized in that, The aforementioned through holes are several in number and are evenly distributed on the auxiliary oil passage valve.

3. The dispenser as claimed in claim 1, characterized in that, When the pressure at the oil inlet is released, the auxiliary oil circuit spring pushes the auxiliary oil circuit valve to reset, and the main oil circuit spring pushes the main oil circuit valve to reset.

4. The dispenser as claimed in claim 1, characterized in that, It also includes a fireproof cover, which is disposed outside the oil drain port housing assembly.

5. The dispenser as claimed in claim 1, characterized in that, It also includes a rubber ring A, which is disposed outside the inlet housing and is used to fix it to the engine.

6. The dispenser as claimed in claim 1, characterized in that, It also includes a rubber ring B, which is disposed outside the drain port housing assembly and is used to fix it to the engine.

7. The dispenser as claimed in claim 1, characterized in that, The main oil passage valve is provided with evenly distributed slits.

8. The dispenser as claimed in claim 1, characterized in that, The main oil circuit valve is equipped with a pressure relief hole.

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