Oil collecting base of aircraft engine accessory casing shell
By designing an oil collection base with functions for oil collection, filtration, and metal shavings detection, the problems of single function and large space occupation of external pipelines in existing technologies have been solved, achieving a compact structure, low cost, and high integration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AECC SHENYANG ENGINE RES INST
- Filing Date
- 2026-03-06
- Publication Date
- 2026-04-21
AI Technical Summary
The existing oil collection base of the aircraft engine accessory casing cannot simultaneously achieve functions such as oil collection, filtration, metal shavings detection and sealing, and the external pipeline occupies a large space and has a low degree of integration.
Design an oil collection base for an aircraft engine accessory casing, integrating an oil return ring, filter screen, and magnetic plug interface. Through integrated design, it achieves oil collection, filtration, and metal shavings detection, with a compact structure and no external pipelines.
It achieves multi-functional integration, reduces space occupation, lowers costs, and improves processability and assemblability.
Smart Images
Figure CN121897465A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of aircraft engine accessory housing design, specifically relating to an oil collection base for an aircraft engine accessory housing. Background Technology
[0002] Aircraft engine accessory housings are compact and highly integrated. The internal gears and bearings utilize oil mist lubrication, and the supply and return oil flow paths of the lubrication system are embedded within the accessory housing shell, with no external supply and return oil lines. When designing the accessory housing shell, the characteristics of the lubrication system must be considered, and the shell structure must meet lubrication requirements.
[0003] The aircraft engine accessory housing is machined into a single piece. Due to its compact structure and limited space for assembly, some gear shafts need to be installed inside the housing through access holes designed at the bottom. Therefore, considering both manufacturability and assemblability, the accessory housing cannot be designed as a closed structure.
[0004] Currently, there is an oil collection base designed to be connected to the bottom of the aircraft engine accessory housing to seal the accessory housing. However, the current oil collection base cannot simultaneously achieve functions such as oil collection, filtration, metal shavings detection, and sealing. The return oil from various lubrication points in the accessory housing needs to be returned to the lubricating oil pump through an external pipeline. In addition, accessories such as magnetic plugs and oil filters are usually installed at separate interfaces, resulting in a relatively low degree of integration and a relatively large space occupation.
[0005] In view of the aforementioned technical deficiencies, this application is hereby filed. Summary of the Invention
[0006] The purpose of this application is to provide an oil collection base for an aircraft engine accessory casing to overcome or mitigate at least one of the known technical defects.
[0007] The technical solution of this application is:
[0008] An oil collection base for an aircraft engine accessory casing includes a base body;
[0009] The outer periphery of the base has an annular connecting edge, which is connected to the bottom of the accessory housing.
[0010] An oil collecting chamber is formed between the base and the accessory housing, and the oil collecting chamber is connected to the operating hole opened at the bottom of the accessory housing.
[0011] The oil collecting chamber has an oil return ring, and the bottom side wall has an oil return hole that connects to the oil collecting chamber. The top of the oil return ring is in sealed contact with the bottom of the accessory housing, and the top of the oil return ring is connected to the oil return channel opened on the accessory housing, which is connected to the lubricating oil pump.
[0012] A magnetic plug interface is provided on the side wall of the seat body. The magnetic plug interface is connected to the inside of the oil return ring and is used to install the magnetic plug.
[0013] A filter screen is installed inside the oil return ring. The filter screen is cylindrical, with one end facing the oil return hole and the other end facing the magnetic plug interface.
[0014] According to at least one embodiment of this application, in the above-mentioned aircraft engine accessory casing oil collection base, the base body is rectangular;
[0015] A sealing ring is provided between the annular connecting edge and the bottom of the accessory housing.
[0016] According to at least one embodiment of this application, in the above-mentioned aircraft engine accessory casing oil collecting base, the base body has a rectangular groove to form an oil collecting cavity;
[0017] The oil collecting cavity transitions with the inclined surfaces at both ends of the seat.
[0018] According to at least one embodiment of this application, in the above-mentioned oil collection base of the aircraft engine accessory housing, a sealing ring is provided between the top of the oil return ring and the bottom of the accessory housing.
[0019] According to at least one embodiment of this application, in the above-described aircraft engine accessory housing oil collection base, the annular connecting edge is bolted to the bottom of the accessory housing.
[0020] This application has at least the following beneficial technical effects:
[0021] An oil collection base for an aircraft engine accessory casing is provided. It adopts an integrated design and has multiple functions such as oil collection, filtration, metal shavings detection, and sealing. It has a simple structure, small size, light weight, and no additional pipelines. It takes into account low cost and weight reduction design, and has good manufacturability and assemblability. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of an angle of the oil collection base of the aircraft engine accessory casing provided in an embodiment of this application;
[0023] Figure 2 yes Figure 1 Sectional view along axis AA;
[0024] Figure 3 This is a schematic diagram of the oil collection base of the aircraft engine accessory casing provided in an embodiment of this application from another angle;
[0025] Figure 4 yes Figure 3 BB-direction sectional view;
[0026] Figure 5This is an assembly diagram of the oil collection base and the accessory housing of an aircraft engine accessory housing provided in an embodiment of this application;
[0027] in:
[0028] 1-Base; 2-Annular connecting edge; 3-Accessory housing; 4-Oil collection chamber; 5-Oil return ring; 6-Oil return channel; 7-Magnetic plug; 8-Filter screen.
[0029] To better illustrate this embodiment, some content in the accompanying drawings may be omitted, enlarged, or reduced. They are for illustrative purposes only and should not be construed as limiting the scope of this application. Detailed Implementation
[0030] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.
[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 word "comprising" as used in this application description indicates that the concept preceding the word encompasses the concepts listed following the word and their equivalents, without excluding other related concepts.
[0032] Furthermore, the terms indicating location used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable 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. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.
[0033] This application provides an oil collection base for an aircraft engine accessory housing, which can collect lubricating oil from the accessory housing into an oil collection chamber. The oil is then pumped to an oil tank by a lubricating oil pump on the accessory housing to achieve lubricating oil circulation. A magnetic plug interface is provided for checking whether there are metal shavings in the lubricating oil, and a filter screen is installed to filter the lubricating oil, ensuring that the lubricating oil flowing back to the lubricating oil pump is pure and free of impurities.
[0034] Aircraft engine accessory housing oil collection base, such as Figures 1-4As shown, it includes a base 1.
[0035] The base 1 can be designed in the shape of a rectangle, with an annular connecting edge 2 on the outer periphery. The annular connecting edge 2 is bolted to the bottom of the accessory housing 3, and a sealing ring is set therebetween to seal the inner cavity of the accessory housing.
[0036] An oil collecting chamber 4 is formed between the base 1 and the accessory housing 3. The oil collecting chamber 4 is connected to the operating hole opened at the bottom of the accessory housing 3. Specifically, the base 1 can be designed to have a rectangular groove to form the oil collecting chamber 4. The oil collecting chamber 4 and the two ends of the base 1 are connected by an inclined transition.
[0037] The oil collecting chamber 4 has an oil return ring 5. The bottom of the oil return ring 5 is formed in the oil collecting chamber 4. The bottom side wall has an oil return hole that connects to the oil collecting chamber 4. The top of the oil return ring 5 is in sealed contact with the bottom of the accessory housing 3. A sealing ring is provided between them. The top of the oil return ring 5 is connected to the oil return channel 6 opened on the accessory housing 3. The oil return channel 6 is connected to the lubricating oil pump.
[0038] A magnetic plug interface is provided on the side wall of the seat 1. The magnetic plug interface is connected to the inside of the oil return ring 5 and is used to set the magnetic plug 7.
[0039] A filter screen 8 is installed inside the oil return ring 5. The filter screen 8 is cylindrical, with one end facing the oil return hole and the other end facing the magnetic plug interface.
[0040] The lubricating oil inside the accessory casing 3 flows into the base 1 through the operating hole at the bottom, and then flows down the slope into the oil collecting chamber 4. It accumulates in the oil collecting chamber 4, and then flows through the return oil hole into the return oil ring 5. After being filtered by the filter screen 8, it enters the return oil channel 6, and finally enters the return oil stage of the lubricating oil pump. Figure 5 As shown, you can check whether there are metal shavings left in the lubricating oil by removing the magnetic plug 7.
[0041] The oil collection base of the aircraft engine accessory housing has multiple functions such as oil collection, filtration, metal shavings detection, and sealing. It is assembled with the accessory housing to seal the inner cavity of the accessory housing. The lubricating oil in the oil collection cavity returns to the lubricating oil pump through the flow path embedded in the accessory housing, eliminating the need for external pipelines. Moreover, the integrated design of magnetic plug and oil filter results in a compact structure and low cost.
[0042] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.
Claims
1. An oil collection base for an aircraft engine accessory casing, characterized in that, Includes the base (1); The outer periphery of the base (1) has an annular connecting edge (2), which is connected to the bottom of the accessory housing (3); An oil collecting chamber (4) is formed between the base (1) and the accessory housing (3), and the oil collecting chamber (4) is connected to the operating hole opened at the bottom of the accessory housing (3); The oil collecting chamber (4) has an oil return ring (5), and the bottom side wall has an oil return hole that connects to the oil collecting chamber (4). The top of the oil return ring (5) is in sealed contact with the bottom of the accessory housing (3), and the top of the oil return ring (5) is connected to the oil return channel (6) opened on the accessory housing (3). The oil return channel (6) is connected to the lubricating oil pump. A magnetic plug interface is provided on the side wall of the seat (1). The magnetic plug interface is connected to the inside of the oil return ring (5) for setting the magnetic plug (7). A filter screen (8) is installed inside the oil return ring (5). The filter screen (8) is cylindrical, with one end facing the oil return hole and the other end facing the magnetic plug interface.
2. The oil collection base for the aircraft engine accessory casing as described in claim 1, characterized in that, The base (1) is rectangular; A sealing ring is provided between the annular connecting edge (2) and the bottom of the accessory housing (3).
3. The oil collection base for the aircraft engine accessory casing as described in claim 2, characterized in that, The seat (1) has a rectangular groove to form an oil collection cavity (4); The oil collecting cavity (4) and the two ends of the seat (1) are connected by an inclined surface transition.
4. The oil collection base for the aircraft engine accessory casing as described in claim 3, characterized in that, A sealing ring is provided between the top of the oil return ring (5) and the bottom of the accessory housing (3).
5. The oil collection base for the aircraft engine accessory casing as described in claim 4, characterized in that, The annular connecting edge (2) is bolted to the bottom of the accessory housing (3).