An aviation oil filter

Abstract

This invention discloses an aviation lubricating oil filter, comprising an oil inlet, a main shaft, an oil sludge filter sleeve, an oil sludge cover, and a power mechanism. The oil sludge filter sleeve is fixed to the main shaft, and the oil sludge cover is fixed to the outside of the oil sludge filter sleeve. An oil cavity is formed between the oil sludge filter sleeve and the oil sludge cover. An oil outlet is provided at the bottom of the oil sludge cover. The oil inlet is located at the upper end of the main shaft. Multiple oil dispersion holes are provided inside the main shaft, and multiple separation plates are provided below the oil dispersion holes. The separation plates are located inside the oil sludge filter sleeve, and a separation groove is formed between adjacent separation plates to allow lubricating oil to flow to the oil sludge filter sleeve. The diameter of the oil dispersion holes gradually increases from top to bottom, and part of the hole walls slope outwards from top to bottom. Compared with the prior art, this invention can reduce the amount of dirt in the lubricating oil by more than 90%. Secondly, the setting of the oil dispersion holes can accelerate the flow of lubricating oil and improve the filtration efficiency. Thirdly, the lubricating oil does not flow through the dirt, further improving the filtration effect. Fourthly, it is easy to maintain and requires less cleaning.

Description

Technical Field

[0001] This invention belongs to the field of liquid filtration technology, and particularly relates to an aviation lubricating oil filter. Background Technology

[0002] Currently, both internationally and domestically, during the daily operation of aircraft engines, the lubricating oil inside the engine can become contaminated due to engine wear or the influence of the natural environment. Therefore, maintaining the cleanliness of the aircraft engine's lubricating oil system is an important measure to ensure the normal operation of the aircraft engine.

[0003] Therefore, it is very important to design an aviation lubricating oil filter with a simple structure, good filtration performance and high efficiency to separate impurities from the lubricating oil after use in aircraft engines, obtain clean lubricating oil, and enable the lubricating oil to be recycled.

[0004] In the lubrication systems of most aero gas turbine engines, static filters such as screens and grates are used to maintain the cleanliness of the lubrication oil. The size of contaminants in static filters is approximately 40-150 μm. To filter contaminants smaller than 5 μm, the mesh size must be extremely small. Due to the small mesh size, the filter volume must be greatly increased, and the filter element must be cleaned and replaced frequently to prevent clogging. Secondly, the existing centrifugal filter installed on the JT9D engine, at a lubrication oil temperature of 93.3℃ and a lubrication oil flow rate of 45.5 L / min, can effectively separate contaminants with a size of 5 μm (contaminants smaller than 5 μm can also be separated, but with poorer results), but it can only reduce the amount of contaminants in the lubrication oil by about 80%. Summary of the Invention

[0005] This invention proposes an aviation lubricating oil filter, which aims to solve the technical problem that the filtered lubricating oil contains a lot of contaminants in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention proposes an aviation lubricating oil filter, comprising: an oil inlet, a main shaft, an oil sludge filter sleeve, an oil sludge cover, and a power mechanism. The oil sludge filter sleeve is fixed on the main shaft, and the oil sludge cover is fixed on the outside of the oil sludge filter sleeve. An oil cavity is formed between the oil sludge filter sleeve and the oil sludge cover. An oil outlet is provided at the bottom of the oil sludge cover. The oil inlet is located at the upper end of the main shaft. The power mechanism drives the main shaft to rotate. Multiple oil dispersion holes are provided inside the main shaft. Multiple separation plates are provided below the oil dispersion holes. The separation plates are located inside the oil sludge filter sleeve. A separation groove is formed between two adjacent separation plates to allow lubricating oil to flow to the oil sludge filter sleeve. The diameter of the oil dispersion holes gradually increases from top to bottom, and part of the hole wall is inclined outward from top to bottom.

[0007] Preferably, the oil dispersing hole includes a vertical hole and an inclined hole. The vertical hole is parallel to the axis of the main shaft, and the inclined hole is inclined outward from top to bottom. A connecting hole is provided between the vertical hole and the inclined hole, and the connecting hole is connected to the vertical hole and the inclined hole respectively.

[0008] Preferably, the diameter of the vertical hole is greater than the width of the connecting hole, and the diameter of the oblique hole is greater than the diameter of the vertical hole.

[0009] Preferably, the spindle has an oil surface, and a first annular cavity is provided above the oil surface. The diameter of the first annular cavity gradually decreases from top to bottom. The opening of the vertical hole is located on the oil surface, and the opening of the oblique hole is located on the first annular cavity.

[0010] Preferably, a second annular cavity is provided above the first annular cavity, the diameter of the second annular cavity gradually decreases from top to bottom, the oil inlet is located inside the main shaft, and the second annular cavity is connected to the chamber where the oil inlet is located.

[0011] Preferably, the main shaft has a conical surface inside, and the bottom of the separation plate is fixed on the conical surface.

[0012] Preferably, the separating plate is an arc-shaped plate.

[0013] Preferably, the spindle has a connecting ring at the conical surface, and a gap is left between the connecting ring and the separation plate.

[0014] Preferably, a diversion section is provided at the middle position of the oil surface, and the outer contour of the diversion section gradually increases from top to bottom.

[0015] Preferably, an oil collection trough is provided below the oil filter sleeve, the oil collection trough is connected to the oil outlet, and an oil outlet pipe is provided at the bottom of the oil collection trough.

[0016] Compared with existing technologies, the filter of this invention has the advantages of simple operation, simple structure, and stable and reliable operation. It can quickly remove impurities from lubricating oil, and is highly practical and economically beneficial for improving oil quality and restoring the performance of lubricating oil. In particular, it fully disperses and accelerates the lubricating oil before filtration, improving the filtration effect and reducing the amount of dirt in the lubricating oil by more than 90%. Secondly, the oil dispersion holes can accelerate the flow of lubricating oil and improve filtration efficiency. Thirdly, the lubricating oil does not flow through the dirt, so the opportunity for lubricating oil to come into contact with dirt is greatly reduced, further improving the filtration effect. Fourthly, it is easy to maintain and requires less cleaning. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this 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 this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the main shaft of the present invention;

[0020] Figure 3 for Figure 2 Cross-sectional view Figure 1 ;

[0021] Figure 4 for Figure 2 Cross-sectional view Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the oil distribution hole of the spindle of the present invention;

[0023] Figure 6 for Figure 4 A bottom view;

[0024] Figure 7 for Figure 4 A cross-sectional view;

[0025] Figure 8 This is a schematic diagram of the structure of the separation plate of the spindle of the present invention;

[0026] Figure 9 for Figure 8 A cross-sectional view.

[0027] Figure label:

[0028] 1. Oil inlet, 2. Main shaft, 3. Oil filter sleeve, 4. Oil cover, 5. Power mechanism, 6. Oil collection tank, 7. Oil outlet pipe, 8. Support, 9. Oil tank, 21. Oil distribution hole, 22. Separation plate, 23. Oil surface, 24. First annular cavity, 25. Second annular cavity, 26. Conical surface, 27. Connecting ring, 28. Diverter section, 211. Vertical hole, 212. Inclined hole, 213. Connecting hole, 100. Oil cavity, 200. Separation tank. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0030] Please refer to the attached document. Figure 1-3 An aviation lubricating oil filter includes: an oil inlet 1, a main shaft 2, an oil filter sleeve 3, an oil cover 4, and a power mechanism 5. The oil filter sleeve 3 is fitted onto the main shaft 2, and the oil cover 4 is located on the outside of the oil filter sleeve 3. Both the oil filter sleeve 3 and the oil cover 4 are fixed on the main shaft 2. An oil cavity 100 is formed between the oil filter sleeve 3 and the oil cover 4. An oil outlet is provided at the bottom of the oil cover 4. The oil inlet 1 is located at the upper end of the main shaft 2. The power mechanism 5 drives the main shaft 2 to rotate. Multiple oil dispersing holes 21 are provided inside the main shaft 2. Multiple separation plates 22 are provided below the oil dispersing holes 21. The separation plates 22 are located inside the oil filter sleeve 3. A separation groove 200 is formed between two adjacent separation plates 22 to allow lubricating oil to flow to the oil filter sleeve 3. The diameter of the oil dispersing holes 21 gradually increases from top to bottom, and part of the hole wall is inclined outward from top to bottom. Oil from the inlet 1 enters the oil distribution hole 21. As it falls within the distribution hole 21, it flows outwards under centrifugal force. Specifically, the lubricating oil is relatively coarse when it enters the distribution hole 21, and then disperses and refines into a planar form as it flows outwards. The dispersed and refined lubricating oil enters the separation tank 200. The separation plate 22 and the main shaft 2 form an impeller structure. Within the separation tank 200, the lubricating oil is thrown at a high speed onto the inner wall of the oil filter sleeve 3. The oil filter sleeve 3 and the oil cover 4 rotate with the main shaft 2. Under the action of centrifugal force, large contaminants are filtered into the oil filter sleeve 3, while cleaner lubricating oil passes through it. High-density solid contaminants mixed in with the cleaner lubricating oil are thrown out and deposited on the inner wall of the oil cover 4, while low-density oil remains on the outer surface of the oil filter sleeve 3 and collects along the outer surface to the bottom of the oil chamber 100, and then is discharged through the oil outlet. Before secondary filtration, the lubricating oil is fully dispersed and accelerated, improving its filtration efficiency and reducing the amount of contaminants in the lubricating oil by more than 90%. Secondly, the oil dispersion holes 21 can accelerate the flow rate of the lubricating oil and improve filtration efficiency.

[0031] For details, please refer to the appendix. Figure 7 The oil dispersing hole 21 includes a vertical hole 211 and an inclined hole 212. The vertical hole 211 is parallel to the axis of the main shaft 2, and the inclined hole 212 is inclined outward from top to bottom. A connecting hole 213 is provided between the vertical hole 211 and the inclined hole 212, and the connecting hole 213 is connected to the vertical hole 211 and the inclined hole 212 respectively.

[0032] For details, please refer to the appendix. Figure 6The diameter of the vertical hole 211 is the same as the width of the connecting hole 213, while the diameter of the inclined hole 212 is larger than that of the vertical hole 211. Under the action of centrifugal force, the lubricating oil in the vertical hole 211 can flow into the connecting hole 213 and then into the inclined hole 212.

[0033] As another embodiment of the present invention: refer to the appendix Figure 7 The main shaft 2 has an oil surface 23 inside, and a first annular cavity 24 is provided above the oil surface 23. The diameter of the first annular cavity 24 gradually decreases from top to bottom. The opening of the vertical hole 211 is located on the oil surface 23, and the opening of the inclined hole 212 is located on the first annular cavity 24, that is, the upper opening of the inclined hole 212 is higher than the upper opening of the vertical hole 211. This structural design can increase the inlet diameter of the oil distribution hole 21 within a limited radius.

[0034] In another embodiment of the present invention: the upper end of the first annular cavity 24 is connected to a second annular cavity 25, the diameter of the second annular cavity 25 gradually decreases from top to bottom, the oil inlet 1 is located inside the main shaft 2, and the second annular cavity 25 is connected to the chamber where the oil inlet 1 is located. This structural design can reduce the space occupied by the chamber where the oil inlet 1 is located.

[0035] As another embodiment of the present invention: refer to the appendix Figure 9 The main shaft 2 has a conical surface 26 inside, and the bottom of the separation plate 22 is fixed on the conical surface 26. The conical surface 26 is higher in the middle and lower at the edges. This structural design can reduce the adhesion of lubricating oil to the surface of the flow channel and facilitate the splashing of lubricating oil. In this embodiment, the angle of the conical surface 26 is 5°. 0 .

[0036] Specifically, the separation plate 22 is an arc-shaped plate.

[0037] As another embodiment of the present invention: refer to the appendix Figure 4 and attached Figure 8 The main shaft 2 has a connecting ring 27 at the conical surface 26, with a gap between the connecting ring 27 and the separating plate 22. Above the gap is a vertical hole 211. The lubricating oil in the vertical hole 211 falls into the gap and, under the action of centrifugal force, flows into the nearby separating tank 200 and is then thrown out. Under the action of centrifugal force, the lubricating oil in the gap can flow into the separating tank 200, which has less lubricating oil, thus having a further dispersion and refinement effect.

[0038] As another embodiment of the present invention: refer to the appendix Figure 5A diversion section 28 is provided at the middle position of the oil surface 23, and the outer contour of the diversion section 28 gradually increases from top to bottom. This design allows the lubricating oil to disperse and flow towards the edge of the oil surface 23 after falling into the diversion section 28, and then enter the oil distribution hole 21. Secondly, it prevents dirt from accumulating at the center of the spindle 2 for a long time, thus preventing corrosion and failure of the spindle 2. After initial dispersion and refinement by the diversion section 28, the oil then enters the oil distribution hole 21 for a second dispersion and refinement, allowing the lubricating oil to be more evenly distributed onto the oil filter sleeve 3.

[0039] In another embodiment of the present invention: an oil collection trough 6 is provided below the oil filter sleeve 3, and the oil collection trough 6 is connected to the oil outlet. An oil outlet pipe 7 is provided at the bottom of the oil collection trough 6. The oil in the oil chamber 100 enters the oil collection trough 6 through the oil outlet, and the clean lubricating oil is discharged from the filter through the oil outlet pipe 7. The inner diameter of the oil collection trough 6 is larger than the inner diameter of the oil filter sleeve 3 to prevent the filtered lubricating oil from being thrown out along the gap between the oil filter sleeve 3 and the oil collection trough 6. A chamfer is added to the oil leakage hole at the bottom of the oil collection trough 6 (where it connects to the oil outlet pipe 7), and the chamfered part of the trough wall is cleaned to facilitate drainage and effectively prevent oil deposition and adsorption at the bottom of the trough.

[0040] Specifically, the oil filter sleeve 3 has a pore diameter of Φ3 and a pore spacing of 4, arranged in 12 layers, totaling 864 pores. Reducing the pore diameter effectively ensures the cleanliness of the lubricating oil filtration. In terms of pore processing, laser cutting is used to reduce deformation of the thin-walled cylinder, ensure assembly accuracy, and reduce vibration during high-speed rotation of the main shaft 2. The pore design of the oil filter sleeve 3, combined with other components, can effectively separate contaminants as small as 3μm, reducing the amount of contaminants in the lubricating oil by more than 90%.

[0041] In another embodiment of the present invention: the power mechanism 5 includes a motor and a coupling, and the lower end of the main shaft 2 is fixedly connected to the main shaft 2 of the motor via the coupling. The present invention also includes a bracket 8, and the upper and lower ends of the main shaft 2 are both connected to the bracket 8 via bearings. The motor and the oil collection tank 6 are respectively fixed on the bracket 8.

[0042] Specifically, the lower end of bracket 8 is fixed with multiple legs, and the motor is located between the multiple legs.

[0043] Specifically, an oil tank 9 is installed above the bracket 8, and the oil tank 9 is connected to the oil inlet 1.

[0044] Specifically, the bolt passes through the oil sludge cover 4 and the oil sludge filter sleeve 3 and is then threaded into the main shaft 2.

[0045] The upper end of spindle 2 is sealed with a skeleton oil seal with a secondary lip. The secondary lip can effectively prevent dust and water from entering the oil seal, ensuring the sealing effect.

[0046] In this invention, when the motor rotates at high speed, it drives the main shaft 2 to rotate at high speed as well. When the lubricating oil in the oil tank 9 falls into the interior of the main shaft 2 through the oil inlet 1, it then enters the separation tank 200 along the oil distribution hole 21, and is then thrown towards the oil filter sleeve 3 at a high speed. When the main shaft 2 rotates at high speed, the oil filter sleeve 3 and the oil cover 4 also rotate at high speed. The surface of the oil filter sleeve 3 has numerous small holes. Under the action of high-speed centrifugal force, large contaminants are blocked inside the oil filter sleeve 3, while cleaner lubricating oil passes through it. High-density solid contaminants mixed in with the cleaner lubricating oil are thrown out and deposited on the inner wall of the oil cover 4, while low-density oil remains on the outer surface of the oil filter sleeve 3 and collects along the outer surface to the bottom of the oil chamber 100. It then enters the oil collection tank 6 through the oil outlet and is finally discharged through the oil outlet pipe 7. This process achieves the separation of solid contaminants from the oil, thus purifying the oil. During this process, the lubricating oil is fully dispersed and accelerated before secondary filtration, improving its filtration effect and reducing the amount of contaminants in the lubricating oil by more than 90%. Secondly, the oil dispersion holes 21 accelerate the flow rate of the lubricating oil, improving filtration efficiency. Thirdly, the lubricating oil does not flow through the contaminants but flows down the outer wall of the oil filter sleeve 3, thus greatly reducing the opportunity for the lubricating oil to come into contact with contaminants, resulting in smaller changes in its acid value and viscosity, further enhancing the filtration effect.

[0047] After the lubricating oil in oil tank 9 is almost completely filtered, remove the bucket for collecting clean lubricating oil from under the oil outlet pipe 7 and replace it with a bucket for collecting dirt. Stop the motor; the centrifugal force disappears, and the dirt in the oil filter sleeve 3 and oil sludge cover 4 falls into the oil collection tank 6, then flows along the oil outlet pipe 7 into the bucket. During this process, the remaining lubricating oil in oil tank 9 will flush down the dirt in the oil filter sleeve 3, thus effectively reducing the frequency of filter cleaning and simplifying maintenance. Since most of the dirt in the lubricating oil is filtered into the oil filter sleeve 3, and only a small portion remains in the oil sludge cover 4, it only affects the filtration effect after accumulating to a certain level. Therefore, the oil sludge cover 4 only needs to be removed and cleaned after a period of use, making maintenance relatively convenient.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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 aviation lubricating oil filter, characterized in that, include: The system comprises an oil inlet, a main shaft, an oil filter sleeve, an oil sludge cover, and a power mechanism. The oil filter sleeve is fixed to the main shaft, and the oil sludge cover is fixed to the outside of the oil filter sleeve. An oil cavity is formed between the oil filter sleeve and the oil sludge cover. An oil outlet is provided at the bottom of the oil sludge cover. The oil inlet is located at the upper end of the main shaft. The power mechanism drives the main shaft to rotate. The main shaft has multiple oil distribution holes, and multiple separation plates are located below the oil distribution holes. The separation plates are located inside the oil filter sleeve, and a space is formed between adjacent separation plates to allow lubricating oil to flow towards the oil filter sleeve. The separation tank has an oil dispersion hole whose diameter gradually increases from top to bottom, and part of the hole wall slopes outward from top to bottom. The oil dispersion hole includes a vertical hole and an inclined hole. The vertical hole is parallel to the axis of the main shaft, and the inclined hole slopes outward from top to bottom. A connecting hole is provided between the vertical hole and the inclined hole, and the connecting hole communicates with the vertical hole and the inclined hole respectively. An oil surface is provided inside the main shaft, and a first annular cavity is provided above the oil surface. The diameter of the first annular cavity gradually decreases from top to bottom. The opening of the vertical hole is located on the oil surface, and the opening of the inclined hole is located on the first annular cavity.

2. The aviation lubricating oil filter according to claim 1, characterized in that, The diameter of the vertical hole is the same as the width of the connecting hole, and the diameter of the oblique hole is larger than the diameter of the vertical hole.

3. The aviation lubricating oil filter according to claim 2, characterized in that, A second annular cavity is provided above the first annular cavity. The diameter of the second annular cavity gradually decreases from top to bottom. The oil inlet is located inside the main shaft. The second annular cavity is connected to the chamber where the oil inlet is located.

4. The aviation lubricating oil filter according to claim 1, characterized in that, The main shaft has a conical surface inside, and the bottom of the separation plate is fixed on the conical surface.

5. The aviation lubricating oil filter according to claim 4, characterized in that, The separation plate is an arc-shaped plate.

6. The aviation lubricating oil filter according to claim 5, characterized in that, The main shaft has a connecting ring at the conical surface, and a gap is left between the connecting ring and the separation plate.

7. The aviation lubricating oil filter according to claim 4, characterized in that, A flow divider is provided at the middle position of the oil surface, and the outer contour of the flow divider gradually increases from top to bottom.

8. The aviation lubricating oil filter according to claim 1, characterized in that, The oil filter sleeve is provided with an oil collection tank at the bottom, which is connected to the oil outlet, and an oil outlet pipe is provided at the bottom of the oil collection tank.

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