An aeroengine oil tank

Abstract

The application belongs to the field of aero-engines, and particularly relates to an aero-engine lubricating oil tank, which comprises a lubricating oil tank body, wherein the lubricating oil tank body is provided with an upper oil tank and a lower oil tank, an oil tank partition plate is arranged between the upper oil tank and the lower oil tank, a plurality of oil passage holes are arranged on the oil tank partition plate and are in communication with the upper oil tank and the lower oil tank, the diameters of the oil passage holes gradually decrease from the upper oil tank to the lower oil tank, the upper oil tank is provided with an oil supply port, and an oil passage is arranged on the side wall of the lubricating oil tank body and is in communication with the lower oil tank and the oil supply port. The oil passage holes with variable diameters are arranged, the difference between the flow velocities in two directions of the oil passage holes is fully utilized, the lubricating oil can quickly flow from the upper oil tank into the lower oil tank, the advantage of reducing the unusable volume of the lubricating oil under the condition of instantaneous dynamic large attitude is achieved, and when the lubricating oil flows from the lower oil tank to the upper oil tank, the speed is much slower, the lubricating oil in the internal cavity of the lower oil tank is less affected by the change of the large attitude, and the supply of the lubricating oil in a certain period of time can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of aero-engines, and specifically relates to an aero-engine lubricating oil tank. Background Technology

[0002] The oil tank is an important component of the engine's lubrication system. The main function of the lubrication system is to provide lubricating oil at a certain temperature and pressure to the system, lubricating and cooling the engine's bearings, gear system, etc. The lubrication system should have a storage device for lubricating oil, namely the oil tank, to provide a continuous replenishment of the engine's lubricating oil consumption.

[0003] The total volume of an aircraft engine oil tank includes usable oil volume, unusable oil volume, and intake / discharge oil volume. Due to the shape and size characteristics of the oil tank and oil supply channels, and the need for the oil tank to adapt to large flight attitudes, the unusable volume accounts for a relatively high proportion of the total volume.

[0004] Unavailable volume directly affects the demand for lubricating oil and the volume of the oil tank, which in turn affects the size and weight of the engine. Therefore, in order to reduce the size and weight of the engine and thus improve the thrust-to-weight ratio of the aircraft, unavailable volume should be minimized.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this invention provides an aircraft engine oil tank. By setting an oil passage with a variable diameter, this invention fully utilizes the difference in flow velocity in the two directions of the oil passage, allowing oil to flow quickly from the upper oil tank to the lower oil tank. This has the advantage of reducing the unusable oil volume during instantaneous maneuvers and large attitudes. Specifically, during instantaneous maneuvers and large attitudes, the flow velocity of oil from the lower oil tank to the upper oil tank slows down significantly. Therefore, the oil in the internal cavity of the lower oil tank is minimally affected by large attitude changes, ensuring oil supply for a certain period of time.

[0007] This invention includes the following technical solutions:

[0008] This invention provides an aircraft engine oil tank, comprising an oil tank body, wherein the oil tank body is provided with an upper oil tank and a lower oil tank, and an oil tank partition is provided between the upper oil tank and the lower oil tank. The oil tank partition is provided with a plurality of oil passage holes connecting the upper oil tank and the lower oil tank; the diameter of the oil passage holes gradually decreases from the upper oil tank to the lower oil tank; the upper oil tank is provided with an oil supply port, and an oil passage connecting the lower oil tank and the oil supply port is provided on the side wall of the oil tank body.

[0009] Furthermore, a filter mechanism is provided inside the lower oil tank to filter the lubricating oil entering the oil circuit.

[0010] Furthermore, the filtration mechanism is located below the oil tank partition.

[0011] Furthermore, the filtration mechanism includes an oil supply channel and a filter screen. The filter screen is fitted over the oil supply channel. The lubricating oil entering the lower oil tank passes through the filter screen and then enters the oil supply channel. The oil supply channel is connected to the oil circuit.

[0012] Furthermore, an oil outlet is provided at one axial end of the oil supply channel, and the oil outlet is connected to the oil circuit.

[0013] Furthermore, the oil circuit includes a first oil circuit and a second oil circuit. The upper end of the first oil circuit is connected to the oil supply port, and the lower end is connected to one end of the second oil circuit. The other end of the second oil circuit is connected to the oil outlet of the filter mechanism.

[0014] Furthermore, it also includes a first partition and a second partition. The first partition is vertically disposed within the body of the lubricating oil tank, forming the first oil passage with the wall of the lubricating oil tank body; the second partition is horizontally disposed, forming the second oil passage with the bottom surface of the lubricating oil tank body.

[0015] Furthermore, the filter mechanism is detachably connected inside the lower oil tank.

[0016] Furthermore, the lower oil tank is characterized by having an oil drain port.

[0017] Furthermore, the oil supply port is connected to an oil pump mounting base.

[0018] By adopting the above technical solution, the present invention has the following advantages:

[0019] 1. This invention utilizes the difference in flow velocity between the two directions of the oil passage by setting an oil passage with a variable diameter, so that lubricating oil can flow quickly from the upper oil tank to the lower oil tank. This has the advantage of reducing the unusable volume of lubricating oil during instantaneous maneuvering and large attitude flight. That is, during instantaneous maneuvering and large attitude flight, the speed of lubricating oil flowing from the lower oil tank to the upper oil tank will be much slower. Therefore, the lubricating oil in the inner cavity of the lower oil tank is less affected by the large attitude change, which can ensure the supply of lubricating oil for a certain period of time.

[0020] 2. The lubricating oil tank of the present invention does not use flexible hoses, and has the advantages of stable and reliable structure and long service life.

[0021] 3. This invention employs a dynamic-static separation lubrication tank design to ensure the oil level is maintained during instantaneous high-speed maneuvers.

[0022] It can supply enough lubricating oil.

[0023] 4. This invention can effectively increase the unusable volume of oil for instantaneous maneuvering and large attitude gliding, while integrating the oil supply and oil filter. The split design allows for adjustment of the oil supply structure according to different requirements. Moreover, other adapters can be used to replace it for relevant tests during the scientific research and testing phase. Tooling can be designed for airtightness tests during the acceptance and inspection of the lubricating oil tank.

[0024] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an aircraft engine oil tank in an embodiment of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of an aircraft engine oil tank in an embodiment of the present invention. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the lower oil tank in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the oil passage structure in an embodiment of the present invention;

[0030] Figure 5 This is a partial structural diagram of an aircraft engine oil tank according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the filtration mechanism in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the oil supply channel in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the fuel tank plug in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of an aircraft engine oil tank in an embodiment of the present invention. Figure 3 ;

[0035] In the diagram, 10-oil tank body, 11-upper oil tank, 111-fill port, 12-lower oil tank, 121-drain port, 20-oil tank partition, 21-oil passage, 30-oil supply port, 40-oil passage, 41-first oil passage, 42-second oil passage, 50-filter mechanism, 51-oil supply channel, 511-tapered cylindrical section, 512-limiting boss, 52-filter screen, 60-oil tank plug, 61-bolt mounting hole, 62-lower limit groove, 63-upper limit groove, 64-rubber ring groove, 70-first partition, 80-second partition, 90-oil pump mounting base. Detailed Implementation

[0036] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] This embodiment provides an oil tank for an aircraft engine, such as... Figure 1 , Figure 2 As shown, the system includes a lubricating oil tank body 10, which has an upper oil tank 11 and a lower oil tank 12. An oil tank partition 20 is provided between the upper oil tank 11 and the lower oil tank 12. The oil tank partition 20 has a plurality of oil passage holes 21 connecting the upper oil tank 11 and the lower oil tank 12. The diameter of the oil passage holes 21 gradually decreases from the upper oil tank 11 to the lower oil tank 12. The upper oil tank 11 is provided with an oil supply port 30, and an oil passage 40 is provided on the side wall of the oil tank body to connect the lower oil tank 12 and the oil supply port 30.

[0039] Based on the structure of the present invention, the oil supply port 30 is located at the lowest point of the oil pipe relative to the liquid level.

[0040] In some embodiments, such as Figure 3 The diagram shows the structure of the lower oil tank 12. It should be noted that the cavity portion of the lower oil tank 12 is not shown in the diagram; the oil tank partition 20 is part of the lower oil tank 12. Preferably, the upper surface of the oil tank partition 20 located inside the upper oil tank 11 is arc-shaped, which has the advantage of reducing weight and ensures that the height of the oil level to the oil inlet is basically the same when rotating at different angles.

[0041] It should be noted that the shape of the oil passage 21 is not limited in this invention; preferably, the oil passage 21 is funnel-shaped; such as Figure 4 As shown, the funnel shape has the advantage of improving the stability of lubricating oil flow.

[0042] In some embodiments, such as Figure 1 , Figure 2 , Figure 5 As shown, a filter mechanism 50 is provided inside the lower oil tank 12, which filters the lubricating oil entering the oil passage 40. By filtering the lubricating oil entering the oil passage 40 through the filter mechanism 50, impurities are prevented from being transported to the oil pump and lubrication points, thus preventing damage to the oil pump and lubrication points.

[0043] In some embodiments, the filter mechanism 50 is disposed below the oil tank partition 20. This provides better filtration of the lubricating oil.

[0044] In some embodiments, such as Figure 6 As shown, the filtration mechanism 50 includes an oil supply channel 51 and a filter screen 52. The filter screen 52 is fitted over the oil supply channel 51. Lubricating oil entering the lower oil tank 12 passes through the filter screen 52 and then enters the oil supply channel 51. The oil supply channel 51 is connected to the oil passage 40. This structure ensures that all lubricating oil entering the oil filter is filtered, further improving the cleanliness of the lubricating oil and thus preventing damage to the oil pump and lubrication points.

[0045] In some embodiments, an oil outlet is provided at one axial end of the oil supply channel 51, and the oil outlet is connected to the oil passage 40. This structure ensures that the lubricating oil entering the oil filter is filtered, further improving the cleanliness of the lubricating oil and thus preventing damage to the oil pump and lubrication points.

[0046] In some embodiments, such as Figure 2 As shown, the oil circuit 40 includes a first oil circuit 41 and a second oil circuit 42. The upper end of the first oil circuit 41 is connected to the oil supply port 30, and the lower end is connected to one end of the second oil circuit 42. The other end of the second oil circuit 42 is connected to the oil outlet of the filter mechanism 50.

[0047] In some embodiments, such as Figure 2 As shown, it also includes a first partition 70 and a second partition 80. The first partition 70 is vertically disposed inside the oil tank body 10, forming the first oil passage 41 with the wall of the oil tank body 10; the second partition 80 is horizontally disposed, forming the second oil passage 42 with the bottom surface of the oil tank body 10. This structure avoids the use of hoses and has the advantage of reducing counterweight.

[0048] In some embodiments, the filter mechanism 50 is detachably connected to the lower oil tank 12. This detachable connection facilitates the cleaning and replacement of the filter mechanism 50.

[0049] For example, the lower oil tank 12 has a first connecting hole and a second connecting hole, which are respectively used to connect the two ends of the oil supply channel 51; this structure enables the detachable connection of the filter mechanism 50; thus facilitating the cleaning and replacement of the filter mechanism 50.

[0050] For example, such as Figure 7 The oil supply channel 51 shown is a section of circular pipe, with one end having an oil outlet being a tapered cylindrical section 511, and the first connecting hole being a tapered hole of the same angle; the oil supply channel 51 and the first connecting hole are subjected to axial pressure by the compression of a wave spring to ensure a tight fit between the two and guarantee a sealing effect. At the same time, this fit can improve the structural rigidity and damping.

[0051] Combination Figure 7 , Figure 8 As shown, an opening is made on the lower side of the oil supply channel 51 (it should be noted that...). Figure 7 The hole described above faces upwards (in actual use, the hole faces downwards). Its position, shape, and size are adaptively adjusted according to the overall structure and posture requirements of the lubricating oil tank. Two limiting bosses 512 are provided at the other end of the oil supply channel 51, which correspond to the limiting grooves on the oil tank plug 60. To prevent errors, the two limiting bosses 512 must be of different sizes. The oil tank plug 60 mainly consists of bolt mounting holes 61, rubber ring grooves 64, upper limiting grooves 63, and lower limiting grooves 62. The oil tank plug 60 is mainly used for sealing the lower oil tank 12, ensuring no leakage of lubricating oil through two O-ring seals. It is fixed to the casing with bolts. The hole on the casing at the oil tank plug 60 can be used for sand removal during casing casting and can also serve as a subsequent inspection port. The oil tank plug 60 is designed with a round hole that mates with the oil supply channel 51. A wave spring and an adjusting shim are arranged inside the hole. The wave spring provides clamping force to the oil supply channel 51, and the adjusting shim adjusts the axial distance and controls the compression of the wave spring. The upper limit groove 63 of the fuel tank plug 60 is composed of multiple grooves. The vertical groove allows the boss of the fuel supply channel 51 to enter axially, and the radial groove allows the boss of the fuel supply channel 51 to rotate. After rotating to the limit position, it is released. Under the action of the wave spring, the fuel supply channel 51 moves axially and is locked into the groove, thereby preventing it from loosening. It can also simplify the disassembly process and ensure that the fuel supply channel 51 can be removed together when the fuel tank plug 60 is removed.

[0052] The design incorporates two O-rings to seal the oil tank cap, enhancing its fire resistance.

[0053] The oil supply channel 51 and the oil tank plug 60 are fitted together by two bosses and grooves to achieve the functions of preventing misalignment and axial limiting.

[0054] The lower oil tank 12 is provided with an oil drain port 121. It should be noted that the location of the oil drain port 121 is not limited in this invention; for example, such as... Figure 1 As shown, the oil drain port 121 can be located at the bottom of the lower oil tank 12; as Figure 2 As shown, the oil drain port 121 can be located on the side wall of the lower oil tank 12 near the bottom.

[0055] In some embodiments, the oil supply port 30 is connected to an oil pump mounting base 90, which facilitates the installation of the oil pump.

[0056] It should be noted that the upper fuel tank 11 is also equipped with a filler neck 111. For example... Figure 9 As shown, lubricating oil is added by gravity through filler port 111 into upper oil tank 11, and then through oil passage 21 into lower oil tank 12. After lower oil tank 12 is full, oil is added again to fill upper oil tank 11. During use, after the engine starts running, lubricating oil enters oil circuit 40 through filter mechanism 50, and enters lubricating oil pump through oil supply port 30, which then supplies lubricating oil to other parts that require lubrication.

[0057] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of multiple components or the interaction between multiple components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In the description of this invention, it should be understood that all terms used to indicate orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this invention.

[0060] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil tank for an aircraft engine, characterized in that, The system includes a lubricating oil tank body (10), which is provided with an upper oil tank (11) and a lower oil tank (12). An oil tank partition (20) is provided between the upper oil tank (11) and the lower oil tank (12). The oil tank partition (20) is provided with a plurality of oil passage holes (21) connecting the upper oil tank (11) and the lower oil tank (12). The diameter of the oil passage holes (21) gradually decreases from the upper oil tank (11) to the lower oil tank (12). The upper oil tank (11) is provided with an oil supply port (30). An oil passage (40) connecting the lower oil tank (12) and the oil supply port (30) is provided on the side wall of the lubricating oil tank body (10). The lower oil tank (12) is equipped with a filter mechanism (50), which filters the lubricating oil entering the oil circuit (40); The filter mechanism (50) is located below the oil tank partition (20); The filtration mechanism (50) includes an oil supply channel (51) and a filter screen (52). The filter screen (52) is fitted over the oil supply channel (51). The lubricating oil entering the lower oil tank (12) passes through the filter screen (52) and then enters the oil supply channel (51). The oil supply channel (51) is connected to the oil circuit (40). The oil circuit (40) includes a first oil circuit (41) and a second oil circuit (42); It also includes a first partition (70) and a second partition (80). The first partition (70) is vertically arranged inside the oil tank body (10) and forms the first oil passage (41) with the wall of the oil tank body (10). The second partition (80) is horizontally arranged and forms the second oil passage (42) with the bottom surface of the oil tank body (10).

2. The aircraft engine lubricating oil tank according to claim 1, characterized in that, An oil outlet is provided at one axial end of the oil supply channel (51), and the oil outlet is connected to the oil circuit (40).

3. The aircraft engine lubricating oil tank according to claim 2, characterized in that, The upper end of the first oil passage (41) is connected to the oil supply port (30), and the lower end is connected to one end of the second oil passage (42). The other end of the second oil passage (42) is connected to the oil outlet of the filter mechanism (50).

4. An aircraft engine lubricating oil tank according to any one of claims 1-3, characterized in that, The filter mechanism (50) is detachably connected to the lower oil tank (12).

5. An aircraft engine lubricating oil tank according to any one of claims 1-3, characterized in that, The lower oil tank (12) is provided with an oil drain port (121).

6. The lubricating oil tank for an aircraft engine according to claim 1, characterized in that, The oil supply port (30) is connected to the lubricating oil pump mounting base (90).

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