An engine sump gravity fuel filling port structure

Abstract

This application belongs to the field of aero-engine structure design, and particularly relates to a gravity fuel filling port structure for an engine oil sump. It includes: a fuel filling port main body, a lid, and a positioning pin. At the top of the fuel filling port main body, a plurality of first tooth grooves are circumferentially arranged. At the bottom of the fuel filling port main body, there is an installation edge, which is fixedly connected to the oil sump housing through a bolt assembly, and two limiting grooves are formed in the installation edge; the lid is installed on the fuel filling port main body. On the inner side of the lid, there are second tooth grooves that cooperate with the first tooth grooves. At the bottom of the lid, there is an outward-turning edge, and two semi-circular notches corresponding to the limiting grooves are arranged on the outward-turning edge; there are two positioning pins. At the top of the positioning pin, there is a cylindrical protrusion. At the bottom, a locking spring is installed. In the middle, there is a handle. The positioning pin is installed in the corresponding limiting groove in cooperation with the locking spring. This application has fewer components and less processing difficulty.

Description

Technical Field

[0001] This application belongs to the field of aero-engine structure design, and particularly relates to a gravity fuel filling port structure for an engine oil sump. Background Art

[0002] The oil sump of an aero-engine and a gas turbine is an important component for storing and transporting lubricating oil. During engine operation, a certain amount of lubricating oil consumption is allowed, so it is necessary to regularly fill the oil sump with lubricating oil to ensure that the engine has sufficient endurance. The methods of lubricating oil filling are generally divided into two types: gravity filling and pressure filling. Gravity filling is a method of pouring lubricating oil into the oil sump through the fuel filling port by relying on gravity; pressure filling is a method of pressurizing and injecting lubricating oil into the oil sump through a fuel filling device. Gravity filling is often used because it does not require additional fuel filling equipment. When using the gravity filling method for lubricating oil filling, the oil sump should be designed with a fuel filling port that can be easily disassembled, and at the same time, the fuel filling port is required to have sealing performance and a reliable self-locking function to prevent detachment.

[0003] Although the existing technologies can meet the usage requirements of filling lubricating oil into the engine oil sump, there are still the following problems: a large number of components, heavy weight; complex structure and high processing cost; the self-locking structure is unreliable and a fuse is still needed for locking.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate at least one of the above-mentioned defects of the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide a gravity fuel filling port structure for an engine oil sump to solve at least one problem existing in the existing technology.

[0006] The technical solution of this application is as follows:

[0007] This application provides a gravity fuel filling port structure for an engine oil sump, including:

[0008] A fuel filling port body, at the top of which a plurality of first tooth grooves are circumferentially arranged, at the bottom of which an installation edge is provided, the installation edge is fixedly connected to the oil sump housing through a bolt assembly, and two limiting grooves are formed in the installation edge;

[0009] A lid, which is installed on the fuel filling port body, on the inner side of which second tooth grooves matching the first tooth grooves are provided, at the bottom of which an outward-turned edge is provided, and two semicircular notches corresponding to the limiting grooves are provided on the outward-turned edge;

[0010] Two positioning pins, at the top of which cylindrical protrusions are provided, at the bottom of which locking springs are installed, and in the middle of which handles are provided, and the positioning pins are installed in the corresponding limiting grooves in cooperation with the locking springs;

[0011] During assembly, the positioning pin is pressed down by pressing the handle. After connecting the lid to the fuel filler main body, the handle is released, and the cylindrical protrusion at the top of the positioning pin is located in the semi-circular notch of the lid to prevent the lid from rotating.

[0012] In at least one embodiment of the present application, a rubber ring groove is circumferentially formed in the middle of the fuel filler main body, and a rubber ring is installed in the rubber ring groove.

[0013] In at least one embodiment of the present application, the central angles corresponding to the two limiting grooves are 10°.

[0014] In at least one embodiment of the present application, four of the first alveolar sockets and the second alveolar sockets are evenly arranged circumferentially.

[0015] In at least one embodiment of the present application, knurling treatment is performed on the outer side of the lid.

[0016] In at least one embodiment of the present application, scale lines for indicating the switch state and a rotation arrow for prompting the installation direction are provided on the top plane of the lid, and corresponding scale lines and switch words are provided on the installation edge of the fuel filler main body.

[0017] In at least one embodiment of the present application, the two positioning pins are simultaneously pressed tightly by a pressing plate, and the pressing plate is assembled to the lubricating oil tank housing together with the installation edge of the fuel injection port main body by a bolt assembly.

[0018] The invention has at least the following beneficial technical effects:

[0019] The gravity fuel filler structure of the engine lubricating oil tank of the present application has few components and a light total weight; the structures of the components are simple, the processing difficulty is small, and the cost is saved; a double-margin self-locking structure is designed to ensure reliable self-locking of the fuel filler; the installation and disassembly processes of the fuel filler lid are simple, it can adapt to multiple repeated disassembly, has good maintainability and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the gravity fuel filler structure of the engine lubricating oil tank in an embodiment of the present application;

[0021] Figure 2 is a cross-sectional view of the gravity fuel filler structure of the engine lubricating oil tank in an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of the fuel filler main body in an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of the lid in an embodiment of the present application.

[0024] Wherein:

[0025] 1 - fuel filler main body; 2 - lid; 3 - rubber seal; 4 - locating pin; 5 - locking spring; 6 - bolt assembly; 7 - pressing plate. Detailed implementation manners

[0026] To make the purpose, technical solutions and advantages of the implementation of this application clearer, the following will describe the technical solutions in the embodiments of this application in more detail with reference to the accompanying drawings in the embodiments of this application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain this application and should not be construed as limiting this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application. The following will explain the embodiments of this application in detail with reference to the drawings.

[0027] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of this application.

[0028] The following will further describe this application in detail with reference to the attached Figures 1 to 4 drawings.

[0029] This application provides a gravity fuel filler structure for an engine oil sump, including: a fuel filler main body 1, a lid 2, and a locating pin 4.

[0030] Specifically, a plurality of first alveoli are circumferentially arranged at the top end of the fuel filler main body 1. An installation edge is arranged at the bottom end of the fuel filler main body 1. The installation edge is fixedly connected to the lubricating oil tank housing through a bolt assembly 6, and two limiting grooves are formed in the installation edge. The lid 2 is installed on the fuel filler main body 1. Second alveoli matching with the first alveoli are arranged on the inner side of the lid 2. An outward-turning edge is arranged at the bottom end of the lid 2, and two semi-circular notches corresponding to the limiting grooves are arranged on the outward-turning edge. The positioning pin 4 includes two. A cylindrical protrusion is arranged at the top end of the positioning pin 4, a locking spring 5 is installed at the bottom end, and a handle is arranged in the middle. The positioning pin 4 is installed in the corresponding limiting groove in cooperation with the locking spring 5. During assembly, the positioning pin 4 is pressed down by pressing the handle. After the lid 2 and the fuel filler main body 1 are connected, the handle is released, and the cylindrical protrusion at the top of the positioning pin 4 is located in the semi-circular notch of the lid 2 to prevent the lid 2 from rotating.

[0031] The gravity fuel filler structure of the engine lubricating oil tank of the present application is as Figure 3 shown. Four concave-convex first alveoli are symmetrically designed circumferentially at the top end of the fuel filler main body 1. A rubber ring groove is circumferentially formed in the middle of the fuel filler main body 1, and a rubber ring 3 is installed in the rubber ring groove for sealing the lubricating oil tank in cooperation with the lid 2. A plurality of bolt holes are circumferentially formed in the installation edge at the bottom end of the fuel filler main body 1 and are fixed on the lubricating oil tank housing through a bolt assembly 6. A through hole is arranged on the fuel filler main body 1. After the fuel filler main body 1 and the lubricating oil tank housing are assembled, the through hole is directly connected to the inside of the lubricating oil tank, and lubricating oil is filled through the through hole. Two circular deep grooves are circumferentially designed on the installation edge at the bottom end of the fuel filler main body 1. In this embodiment, the central angles corresponding to the two limiting grooves are about 10°, and one locking spring 5 and one positioning pin 4 are assembled in each groove.

[0032] The gravity fuel filler structure of the engine lubricating oil tank of the present application is as Figure 4 shown. Four second alveoli with opposite concavity and convexity are symmetrically designed circumferentially at the corresponding position of the top of the inner side of the lid 2 and the fuel filler main body 1. The fuel filler main body 1 and the lid 2 are fixed through 4 concave-convex alveoli. An outward-turning edge is arranged at the bottom end of the lid 2, and two semi-circular notches are circumferentially designed on the outward-turning edge. The included angle between the two notches is about 10°, corresponding to the two circular deep grooves on the installation edge of the fuel filler main body 1. It can be understood that in this embodiment, the outer side of the lid 2 is subjected to a knurling process, mainly to facilitate the operator to hold the lid 2. A scale line for indicating the "open" and "closed" states of the lid and a rotation arrow for indicating the installation direction of the lid 2 are also designed on the top plane of the outer side of the lid 2, and corresponding scale lines and "open" and "closed" word indications are arranged on the installation edge of the fuel filler main body 1.

[0033] For the gravity fuel filling port structure of the engine oil sump in this application, the lower part of the positioning pin 4 is cylindrical and is assembled in the circular deep groove of the fuel filling port body 1; a pressing handle is provided in the middle of the positioning pin 4, and the operator can press this handle to press down the positioning pin 4; the upper part of the positioning pin 4 is a small cylindrical protrusion. When this protrusion is located in the semi-circular notch on the outer-turned edge at the bottom end of the lid 2, the lid 2 cannot rotate, realizing the locking of the lid 2. The lid 2 is limited by two positioning pins 4 to prevent it from falling off. Advantageously, in this embodiment, the two positioning pins 4 are preferably pressed tightly simultaneously by a pressing plate 7, and the pressing plate 7 is assembled to the oil sump housing together with the mounting edge of the fuel filling port body 1 by a bolt assembly 6.

[0034] For the gravity fuel filling port structure of the engine oil sump in this application, when it is necessary to fill the oil sump with oil, the operator needs to press the handles of the two positioning pins 4 simultaneously, so that the small cylindrical protrusions on the upper part of the positioning pins 4 withdraw from the semi-circular notches on the outer-turned edges of the lid 2, and rotate according to the "open" and "close" indication directions on the top plane outside the lid 2. When the indication scale line is at "open", the lid 2 can be separated from the fuel filling port body 1, and at this time, lubricating oil can be filled into the oil sump. After the lubricating oil filling is completed, the operator presses the handles of the two positioning pins 4 simultaneously again, holds the lid 2 so that the scale line on the top plane is aligned with "open", and then rotates according to the rotation direction indication. When the scale line on the top plane of the lid 2 is aligned with "close", release the two pressed positioning pins 4 to complete the installation of the lid 2.

[0035] The gravity fuel filling port structure of the engine oil sump in this application simplifies the structure, has few components and a light total weight; the structures of the components are simple, the processing difficulty is small, and the cost is saved; a double-margin self-locking structure is designed to ensure the reliable self-locking of the fuel filling port; the installation and disassembly process of the fuel filling lid is simple, can adapt to repeated disassembly, has good maintainability and high reliability.

[0036] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

Claims

1. A gravity fuel filling port structure for an engine sump, characterized in that, Comprising: A fuel filler main body (1), at the top of the fuel filler main body (1), a plurality of first alveoli are circumferentially arranged, at the bottom of the fuel filler main body (1), an installation edge is provided, and the installation edge is fixedly connected to the lubricating oil tank housing through a bolt assembly (6), and two limiting grooves are formed in the installation edge; A lid (2), the lid (2) is installed on the fuel filler main body (1), on the inner side of the lid (2), a second alveolus matching the first alveolus is provided, at the bottom of the lid (2), an outward-turning edge is provided, and two semi-circular notches corresponding to the limiting grooves are provided on the outward-turning edge; Positioning pins (4), including two, at the top of the positioning pins (4), cylindrical protrusions are provided, at the bottom, locking springs (5) are installed, in the middle, handles are provided, and the positioning pins (4) are installed in the corresponding limiting grooves in cooperation with the locking springs (5); During assembly, by pressing the handle, the positioning pins (4) are pressed downwards. After connecting the lid (2) and the fuel filler main body (1), the handle is released, and the cylindrical protrusions at the top of the positioning pins (4) are located in the semi-circular notches of the lid (2) to prevent the lid (2) from rotating; In the middle of the fuel filler main body (1), a rubber ring groove is circumferentially formed, and a rubber ring (3) is installed in the rubber ring groove; The two positioning pins (4) are simultaneously pressed tightly by a pressing plate (7), and the pressing plate (7) is assembled to the lubricating oil tank housing together with the installation edge of the fuel filler main body (1) through the bolt assembly (6).

2. The gravity fuel filling port structure for an engine sump according to claim 1, characterized in that, The central angles corresponding to the two limiting grooves are 10º.

3. The gravity fuel filling port structure for an engine sump according to claim 1, characterized in that, Both the first alveoli and the second alveoli are evenly arranged four in the circumferential direction.

4. The gravity fuel filling port structure for an engine sump according to claim 1, characterized in that, The outer side of the lid (2) is subjected to a knurling process.

5. The gravity fuel filling port structure for an engine sump according to claim 1, characterized in that, On the top plane of the lid (2), scale lines for indicating the switch state and a rotation arrow for prompting the installation direction are provided, and corresponding scale lines and switch words are provided on the installation edge of the fuel filler main body (1).

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