Oil filter device

Abstract

The utility model provides an oil filtering device which is used for filtering oil in an aero-engine, the oil filtering device comprises a filtering structure used for filtering impurities of the oil, the filtering structure is provided with an opening part for the oil to enter, and the oil can enter the inner side of the filtering structure from the opening part and reach the outer side of the filtering structure opposite to the inner side through the filtering structure. Therefore, impurities of the oil liquid are attached to the wall surface of the inner side of the filtering structure. The oil filtering device further comprises a turbulent flow rotor, the turbulent flow rotor is arranged on the inner side of the filtering structure, and the turbulent flow rotor can rotate relative to the filtering structure when oil enters the inner side of the filtering structure. The turbulent flow rotor is used for forming vortex in the rotating process, and then the impurities attached to the wall face of the inner side of the filtering structure are driven to be separated from the filtering structure. The oil filter device is simple in structure, and the service life of the oil filter device can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engines, in particular to an oil filter device. Background Art

[0002] The hydraulic reverse thrust actuation system of an aircraft engine obtains hydraulic oil from the aircraft. Because the components in the hydraulic reverse thrust actuation system have certain cleanliness requirements for the oil, the oil is filtered through an oil filter when the oil is obtained from the aircraft. The oil filter generally adopts a filter structure to block impurities and fine particles.

[0003] However, as the service time increases, impurities and particles will adhere to the filter structure, causing the oil filter's oil flow capacity to decrease, thereby affecting the performance of subsequent oil systems. Frequent replacement of the filter structure will lead to increased maintenance costs. Utility Model Content

[0004] The utility model aims to provide an oil filter device which can extend the replacement period of the filter structure and reduce the maintenance cost while ensuring the filtering function.

[0005] The utility model provides an oil filter device, which is used for filtering oil in an aircraft engine. The oil filter device comprises a filter structure for filtering impurities in the oil. The filter structure has an opening for the oil to enter. The oil can enter the inner side of the filter structure from the opening, pass through the filter structure to the outer side of the filter structure opposite to the inner side, so that the impurities in the oil are attached to the inner wall surface of the filter structure. The oil filter device also comprises a spoiler rotor, which is arranged on the inner side of the filter structure. The spoiler rotor can rotate relative to the filter structure when the oil enters the inner side of the filter structure. The spoiler rotor is used to form a vortex during the rotation process, thereby driving the impurities attached to the inner wall surface of the filter structure to separate from the filter structure.

[0006] In one embodiment, the oil filter device also includes a rotating shaft fixedly arranged on the filter structure, the rotating shaft is located on the inner side of the filter structure, the spoiler rotor is arranged on the rotating shaft and protrudes outward from the rotating shaft, and the spoiler rotor can rotate around the rotating shaft.

[0007] In one embodiment, the spoiler rotor includes a support member and at least one protrusion disposed on the outer circumference of the support member, the support member is sleeved on the outer circumference of the rotating shaft, and the support member is rotatable relative to the rotating shaft.

[0008] In one embodiment, an annular groove portion adapted to the support member is provided on the outer periphery of the rotating shaft, the support member is assembled in the annular groove portion, and the support member is in contact with the annular groove portion and can rotate relative to the annular groove portion.

[0009] In one embodiment, the protrusion is at least one blade, and the blade extends outward from the outer circumference of the support member.

[0010] In one embodiment, the number of the blades is plural, and the blades are spaced apart in the circumferential direction of the support member.

[0011] In one embodiment, the free end of the blade is closer to the opening of the filtering structure than the connecting end where the blade is connected to the supporting member.

[0012] In one embodiment, the connection end has a first connection point and a second connection point opposite to each other, and there is a height difference between the first connection point and the second connection point in the axial direction of the support member.

[0013] In one embodiment, the blade has a first end surface and a second end surface opposite to each other, and the first end surface faces the opening of the filtering structure; wherein the first end surface is a plane, and the second end surface is a curved surface.

[0014] In one embodiment, the filter structure is a filter screen, which includes a cylindrical portion and a bottom, wherein the cylindrical portion and the bottom are both provided with a plurality of filter holes, and the cylindrical portion and the bottom together form the inner side of the filter structure; the rotating shaft is fixedly disposed at the bottom and extends toward the opening.

[0015] The spoiler rotor of the oil filter device provided by the utility model rotates when there is an incoming flow. The rotating spoiler rotor will form a vortex in the filter structure, thereby driving the impurities and particles attached to the filter structure, which can ensure that the filter structure is unobstructed and not blocked by pollutants, ensuring that the oil can flow freely, and the filter structure can continue to block pollutants, ensuring a good oil filtering function, greatly improving the service life of the oil filter device, and reducing maintenance costs. In this way, even if a certain amount of impurities and particles accumulate in the filter structure, it can still be guaranteed that a sufficient amount of clean oil flows out of the oil filter device to meet the oil demand of the subsequent system. In addition, the utility model has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0017] Figure 1 is a schematic diagram of an oil filter device according to an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 A cross-sectional view of the oil filter device in FIG.

[0019] Figure 3 yes Figure 1 A schematic diagram of the filtering structure and the rotating shaft of the oil filter device;

[0020] Figure 4 yes Figure 1 Schematic diagram of the blades of the oil filter device. DETAILED DESCRIPTION

[0021] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are shown in the accompanying drawings. Each example is provided to explain the present invention, rather than to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0022] As used herein, the term "axial direction" refers to the central axis of a component or a direction parallel to the central axis of a component, and the term "circumferential direction" refers to a direction around the "axial direction." The terms "first" and "second" may be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of each component.

[0023] The term "oil filter" refers to a device used to filter hydraulic oil or fuel in aircraft engines. The filter screen blocks impurities or small particles from entering the oil filter, ensuring that the oil that passes through the filter has the required cleanliness.

[0024] The hydraulic reverse thrust actuation system of an aircraft engine obtains hydraulic oil from the aircraft. Because the components in the hydraulic actuation system have certain cleanliness requirements for the oil, the oil is filtered through an oil filter when the oil is obtained from the aircraft. Generally, the oil filter device adopts a filtering structure that can block impurities and fine particles. However, as the use time increases, impurities and particles will adhere to the filtering structure, causing the oil filter's oil passing capacity to decrease, thereby affecting the performance of the subsequent oil system. Frequent replacement of the filtering structure will also increase maintenance costs.

[0025] Figure 1 and Figure 2An embodiment of the oil filter device 10 provided by the utility model is shown. The oil filter device 10 is used to filter the oil in the aircraft engine. The oil filter device 10 includes a filter structure 100 for filtering impurities in the oil. The filter structure 100 has an opening 110 for the oil to enter. The oil can enter the inner side 101 of the filter structure 100 from the opening 110, pass through the filter structure 100 to the outer side 102 of the filter structure 100 opposite to the inner side 101, so that the impurities in the oil are attached to the wall surface of the inner side 101 of the filter structure 100. The oil filter device 10 also includes a spoiler rotor 200, which is arranged on the inner side 101 of the filter structure 100. The spoiler rotor 200 can rotate relative to the filter structure 100 when the oil enters the inner side 101 of the filter structure 100. The spoiler rotor 200 is used to form a vortex during the rotation process, thereby driving the impurities attached to the wall surface of the inner side 101 of the filter structure 100 to separate from the filter structure 100.

[0026] The spoiler rotor 200 of the oil filter device 10 provided by the utility model rotates when there is an incoming flow. The rotating spoiler rotor 200 will form a vortex in the filter structure 100, thereby driving the impurities and particles attached to the filter structure 100, which can ensure that the filter structure 100 is unobstructed and not blocked by pollutants, ensuring that the oil can flow freely, and the filter structure 100 can continue to block pollutants, ensuring a good oil filtering function, greatly improving the service life of the oil filter device 10, and reducing maintenance costs. In this way, even if a certain amount of impurities and particles accumulate in the filter structure 100, it can still be guaranteed that a sufficient amount of clean oil flows out of the oil filter device 10 to meet the oil demand of the subsequent hydraulic reverse thrust actuation system. In addition, the oil filter device 10 of the utility model has a simple structure and low cost.

[0027] Figure 3 FIG. 1 shows a partial structure of the oil filter device 10, which includes a filter structure 100. In one embodiment, as shown in FIG. Figures 1 to 3 As shown, the filter structure 100 is a filter screen (hereinafter, the reference numeral 100 represents the filter screen), and the filter screen 100 includes a cylindrical portion 130 and a bottom portion 140, and the cylindrical portion 130 and the bottom portion 140 are both provided with a plurality of filter holes 120. The bottom portion 140 is connected to one end of the cylindrical portion 130, and the other end of the cylindrical portion 130 forms the opening portion 110, and the bottom portion 140 and the opening portion 110 are opposite to each other. Among them, the cylindrical portion 130 and the bottom portion 140 are enclosed to form an inner side 101. In other words, the cylindrical portion 130 and the bottom portion 140 of the filter screen 100 are separated into an inner side 101 and an outer side 102.

[0028] like Figure 2 and Figure 3As shown, the cylindrical portion 130 may be provided with a plurality of rows of filter holes 120, and the filter holes 120 are circular. The distance between each row of filter holes 120, the distance between each filter hole 120 in each row, the shape and size of the filter holes 120 may be determined according to factors such as the size of impurities in the actual oil and the flow rate of the oil.

[0029] refer to Figure 2 , Figure 2 The dotted arrow in the figure indicates the flow direction of the oil. Before the oil enters the hydraulic reverse thrust actuation system of the aircraft engine, it will enter the inner side 101 from the opening 110 of the filter 100. The oil flows through the filter 100, and impurities and particles with a particle diameter larger than the diameter or size of the filter hole 120 will adhere to the wall surface of the inner side 101 of the cylindrical part 130 and / or the bottom 140. The clean oil after filtration will flow to the outer side 102 through the filter hole 120, that is, it will flow out of the oil filter device 10 and enter the hydraulic reverse thrust actuation system.

[0030] In one embodiment, the oil filter device 10 further includes a rotating shaft 300 fixedly disposed on the filter structure 100, and the rotating shaft 300 is located on the inner side 101 of the filter structure 100. The spoiler rotor 200 is disposed on the rotating shaft 300 and protrudes outward from the rotating shaft 300, and the spoiler rotor 200 can rotate around the rotating shaft 300. Further, the rotating shaft 300 is fixedly disposed on the bottom 140 and extends toward the opening 110. The connection method of the rotating shaft 300 and the bottom 140 can be selected to be welding, so that the rotating shaft 300 and the filter screen 100 form an integrated structure, thereby improving the structural stability and structural strength of the oil filter device 10. Among them, the rotating shaft 300, the cylindrical portion 130 and the spoiler rotor 200 can be arranged coaxially.

[0031] In another embodiment, the rotating shaft 300 and the spoiler rotor 200 are fixedly connected, and the rotating shaft 300 and the spoiler rotor 200 can rotate together relative to the filter screen 100 .

[0032] In one embodiment, the spoiler rotor 200 includes a support member 210 and at least one protrusion 220 disposed on the outer periphery of the support member 210. The support member 210 is sleeved on the outer periphery of the rotating shaft 300, and the support member 210 can rotate relative to the rotating shaft 300. The protrusion 220 can be pushed by the oil when there is an incoming flow, thereby generating a vortex, driving the impurities and particles attached to the filter screen 100, and ensuring that the filter screen 100 is unobstructed. There is a certain distance between the edge of the protrusion 220 and the cylindrical portion 130 to avoid friction between the protrusion 220 and the cylindrical portion 130.

[0033] In one embodiment, the protrusion 220 is at least one blade (the reference numerals below indicate blades). The blade 220 has a simple structure and low cost. The blade 220 extends outward from the outer periphery of the support member 210. The number of blades 220 can be selected to be one, and one blade 220 can surround the support member 210 to form a cone. The number of blades 220 can be selected to be multiple, and the multiple blades 220 are arranged at intervals in the circumferential direction of the support member 210. The multiple blades 220 can be arranged at intervals along the axial direction of the support member 210, and there are gaps between adjacent blades 220 so that oil can pass through and drive the blades 220 to rotate.

[0034] Figure 4 An embodiment of a spoiler rotor 200 is shown. Figure 4 In the embodiment shown, there are three blades 220, which can provide a good turbulence effect, and the gaps between the three blades 220 are consistent. The shape of the blade 220 can adopt a common blade shape, and the edge transition is smooth to reduce the friction between the oil and the blade 220. The support member 210 is in a hollow cylindrical shape, and the two ends of the support member 210 are connected to facilitate assembly with the rotating shaft 210.

[0035] The blade 220 and the support member 210 can rotate clockwise or counterclockwise around the rotation axis 300 , and the rotation direction can be determined according to the shape and structure of the blade 220 without limitation.

[0036] In one embodiment, the free end 221 of the blade 220 is closer to the opening 110 of the filter structure 100 than the connection end 222 where the blade 220 and the support member 210 are connected. Figure 2 As shown, the free end 221 of the blade 220 is located at a position relative to the connecting end 222. Figure 2 The blade 220 and the support member 210 are arranged above the support member 210, so that there is a certain inclination angle between the blade 220 and the support member 210. The connection end 222 has a first connection point 222a and a second connection point 222b opposite to each other, and there is a height difference between the first connection point 222a and the second connection point 222b in the axial direction of the support member 210. When the oil contacts the free end 221 of the blade 220, it will slide from the free end 221 to the connection end 222, and slide from the first connection point 222a and the second connection point 222b at a higher position to the other at a lower position, thereby pushing the blade 220 to rotate by itself without the need for other driving structures to drive it.

[0037] In one embodiment, the blade 220 has a first end surface 223 and a second end surface 224 opposite to each other, and the first end surface 223 faces the opening 110 of the filter structure 100. Figure 2As shown, the first end surface 223 is located above the second end surface 224. The first end surface 223 is a plane, and the second end surface 224 is a curved surface. The plane shape of the first end surface 223 will make the oil flow faster at the top, and the curved surface shape of the second end surface 224 can better guide the flow of the oil, so that the oil leaves the blade 220 more smoothly and flows toward the bottom 140.

[0038] Combination Figures 2 to 4 The offset angle of the blade 220 provides a flow path for the oil, so that the oil drives the blade 220 to rotate, and its movement mechanism is similar to that of a windmill, thereby causing the blade 220 to generate vortices.

[0039] In one embodiment, if Figure 2 As shown, the outer circumference of the rotating shaft 300 is provided with an annular groove 310 adapted to the supporting member 210. The supporting member 210 is assembled in the annular groove 310, and the supporting member 210 is in contact with the annular groove 310 and can rotate relative to the annular groove 310. Figure 2 In the embodiment, the height of the annular groove 310 is consistent with the height of the support member 210, and the depth of the annular groove 310 concave toward the central axis of the rotating shaft 300 is consistent with the thickness of the support member 210, so that when the support member 210 is assembled in the annular groove 310, the outer surface of the support member 210 is flush with the outer surface of the rotating shaft 300, reducing the friction of the oil flow. The height of the annular groove 310 and the support member 210 can be larger, such as Figure 2 As shown, the rotation stability of the blade 220 is improved.

[0040] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. An oil filter device for filtering oil in an aircraft engine, the oil filter device comprising a filter structure for filtering impurities in the oil, the filter structure having an opening for the oil to enter, the oil can enter the inner side of the filter structure from the opening, pass through the filter structure to the outer side of the filter structure opposite to the inner side, so that the impurities in the oil adhere to the inner wall surface of the filter structure; It is characterized in that The oil filter device further comprises a spoiler rotor, which is arranged on the inner side of the filter structure, and the spoiler rotor can rotate relative to the filter structure when the oil enters the inner side of the filter structure; The turbulent rotor is used to form a vortex during rotation, thereby driving impurities attached to the inner wall surface of the filter structure to separate from the filter structure.

2. The oil filter device according to claim 1, characterized in that: The oil filter device also includes a rotating shaft fixedly arranged on the filter structure, the rotating shaft is located on the inner side of the filter structure, the spoiler rotor is arranged on the rotating shaft and protrudes outward from the rotating shaft, and the spoiler rotor can rotate around the rotating shaft.

3. The oil filter device according to claim 2, characterized in that: The spoiler rotor comprises a support member and at least one protrusion arranged on the outer periphery of the support member. The support member is sleeved on the outer periphery of the rotating shaft, and the support member can rotate relative to the rotating shaft.

4. The oil filter device according to claim 3, characterized in that: The outer periphery of the rotating shaft is provided with an annular groove portion adapted to the supporting member, the supporting member is assembled in the annular groove portion, the supporting member is in contact with the annular groove portion and can rotate relative to the annular groove portion.

5. The oil filter device according to claim 4, characterized in that: The protrusion is at least one blade, and the blade extends outward from the outer periphery of the support member.

6. The oil filter device according to claim 5, characterized in that: There are a plurality of blades, and the plurality of blades are arranged at intervals in the circumferential direction of the support member.

7. The oil filter device according to claim 5 or 6, characterized in that: The free end of the blade is closer to the opening of the filtering structure than the connecting end where the blade is connected to the supporting member.

8. The oil filter device according to claim 7, characterized in that: The connecting end has a first connecting point and a second connecting point opposite to each other, and a height difference is formed between the first connecting point and the second connecting point in the axial direction of the supporting member.

9. The oil filter device according to claim 5 or 6, characterized in that: The blade has a first end surface and a second end surface opposite to each other, and the first end surface faces the opening of the filtering structure; wherein, The first end surface is a plane, and the second end surface is a curved surface.

10. The oil filter device according to any one of claims 2 to 5, characterized in that: The filtering structure is a filter screen, and the filter screen includes a cylindrical portion and a bottom portion, and the cylindrical portion and the bottom portion are both provided with a plurality of filtering holes, and the cylindrical portion and the bottom portion enclose the inner side of the filtering structure; The rotating shaft is fixedly disposed on the bottom and extends toward the opening.

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