Groove-shaped oil guide path structure of casing

Abstract

The utility model belongs to the field of aero-engines, and discloses a casing groove-shaped oil guide oil way structure which comprises a groove-shaped oil guide sleeve and a casing oil way, the casing oil way is arranged between a front casing and a rear casing, the oil way of the front casing comprises a radial oil way, and the oil way of the rear casing comprises an axial oil way. The groove-shaped oil guide sleeve is arranged between the radial oil path of the front casing and the axial oil path of the rear casing; an axial oil inlet is formed in the rear end of the groove-shaped oil guide sleeve, a radial fan-shaped groove is formed in the front end of the groove-shaped oil guide sleeve, and an oil passing hole is formed in the groove-shaped oil guide sleeve and communicated with the oil inlet and the fan-shaped groove. The groove-shaped oil guide sleeve structure and the casing oil way are simple and compact in structure, rapid steering of the oil way can be achieved, the length of the casing can be shortened, the weight of the casing can be reduced, and the groove-shaped oil guide sleeve structure and the casing oil way can well adapt to the design structure of the casing.

Description

Technical Field

[0001] The utility model belongs to the field of aviation engines, and relates to a casing oil circuit and an oil guide sleeve used therein, in particular to an aviation engine groove-shaped oil guide sleeve and a casing oil circuit structure. Background Art

[0002] Aircraft engine oil systems provide lubrication and cooling for the gears and bearings of the gearbox and rotor assemblies. Aircraft engine oil circuits are divided into external and internal oil circuits. The external oil circuits are located outside the casing and are independent piping assemblies. The internal oil circuits are located inside the gearbox, compressor, and turbine casings, and are integrated with the casing. They are divided into supply, return, and ventilation circuits.

[0003] When two adjacent casings use internal oil passages to transfer lubricating oil, an oil guide sleeve structure is required between the casings to form a continuous oil passage. Figure 1 As shown, the oil circuit structure is as follows Figure 2 As shown, the oil guide sleeve is inserted into the groove in the casing. However, its disadvantage is that it can only realize the axial connection of the two casing oil circuits. The casing oil circuit needs to have a straight section and a turning section to complete the turning. The structure is not compact, increases the axial length of the casing, and limits the design of the casing structure. When the axial space of the casing is limited, this type of oil guide sleeve cannot be used. It is urgent to design an oil guide sleeve to solve this problem. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a casing groove-shaped oil guide oil circuit structure with a short axial dimension, a simple and compact structure, which realizes rapid steering of the oil circuit and has good adaptability to the casing structure.

[0005] The technical solution of the utility model is as follows:

[0006] A casing groove-shaped oil guide circuit structure includes a groove-shaped oil guide sleeve and a casing oil circuit. The casing oil circuit is arranged between a front casing and a rear casing. The oil circuit of the front casing includes a radial oil circuit, and the oil circuit of the rear casing includes an axial oil circuit. The groove-shaped oil guide sleeve is arranged between the radial oil circuit of the front casing and the axial oil circuit of the rear casing. The rear end of the groove-shaped oil guide sleeve is provided with an axial oil inlet, the front end of the groove-shaped oil guide sleeve is provided with a radial fan-shaped groove, and an oil hole is provided in the groove-shaped oil guide sleeve to connect the oil inlet and the fan-shaped groove.

[0007] Furthermore, the grooved oil guide sleeve includes a front radial sealing groove, a C-shaped section, a rear radial sealing groove and a grooved section; the front radial sealing groove and the rear radial sealing groove are respectively distributed in the front and rear sections of the grooved oil guide sleeve, and the C-shaped section is located in the middle section of the grooved oil guide sleeve; the grooved section includes multiple fan-shaped grooves, and the grooved section is arranged at the front end of the front radial sealing groove.

[0008] Furthermore, the angle θ of the fan-shaped groove is between 20° and 50°, and the number of the fan-shaped grooves is between 4 and 8.

[0009] Furthermore, the height L1 of the sector groove is 1 to 1.5 times the diameter Φ1 of the oil hole.

[0010] Furthermore, an inner circle connected to the oil hole is provided at the center of all the sector grooves, and the inner diameter Φ3 of the inner circle is 2 to 3 times the diameter Φ1 of the oil hole.

[0011] Furthermore, a cylindrical countersunk hole is provided between the inner circle and the oil hole. The inner diameter Φ4 of the cylindrical countersunk hole is 1.5 to 2 times the inner diameter Φ3 of the inner circle, and the depth L2 of the cylindrical countersunk hole is 0.7 to 1.0 times the height L1 of the fan-shaped groove.

[0012] Furthermore, the outer diameter Φ5 of the sector groove is smaller than the outer diameter Φ6 of the rear radial sealing groove.

[0013] Furthermore, the outer diameter Φ6 of the rear radial sealing groove is greater than the outer diameter Φ2 of the front radial sealing groove.

[0014] The utility model has the following beneficial effects:

[0015] The grooved oil guide sleeve structure and the casing oil circuit structure of the utility model are simple and compact, which can realize rapid steering of the oil circuit, thereby shortening the casing length and reducing weight, and can well adapt to the design structure of the casing.

[0016] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation method of the utility model patent, the following is a brief introduction to the drawings required for use in the implementation method. It should be understood that the following drawings only show certain embodiments of the utility model patent and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural diagram of the original oil guide sleeve.

[0019] Figure 2 This is a schematic diagram of the oil circuit structure of the casing using the original oil guide sleeve.

[0020] Figure 3 It is a structural diagram of the grooved oil guide sleeve.

[0021] Figure 4 This is a schematic diagram of the main dimensions of the grooved oil guide sleeve.

[0022] Figure 5 It is a structural diagram of the casing oil circuit using a grooved oil guide sleeve. DETAILED DESCRIPTION

[0023] This section is an embodiment of the present invention, which is used to explain and illustrate the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the orientations or positional relationships in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or case referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; mechanical connections, point connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] Example 1:

[0027] A casing groove-shaped oil guide circuit structure includes a groove-shaped oil guide sleeve and a casing oil circuit. The casing oil circuit is arranged between a front casing and a rear casing. The oil circuit of the front casing includes a radial oil circuit, and the oil circuit of the rear casing includes an axial oil circuit. The groove-shaped oil guide sleeve is arranged between the radial oil circuit of the front casing and the axial oil circuit of the rear casing. The rear end of the groove-shaped oil guide sleeve is provided with an axial oil inlet, the front end of the groove-shaped oil guide sleeve is provided with a radial fan-shaped groove, and an oil hole is provided in the groove-shaped oil guide sleeve to connect the oil inlet and the fan-shaped groove.

[0028] The grooved oil guide sleeve consists of a front radial sealing groove, a C-shaped section, a rear radial sealing groove and a grooved section; the front radial sealing groove and the rear radial sealing groove are respectively distributed in the front and rear sections of the grooved oil guide sleeve, and the C-shaped section is located in the middle section of the grooved oil guide sleeve; the grooved section includes multiple fan-shaped grooves, and the grooved section is arranged at the front end of the front radial sealing groove.

[0029] The angle θ of the fan-shaped groove is between 20° and 50°, and the number of the fan-shaped grooves is between 4 and 8.

[0030] The height L1 of the fan-shaped groove is 1 to 1.5 times the diameter Φ1 of the oil hole.

[0031] An inner circle connected to the oil hole is provided at the center of all the sector grooves, and the inner diameter Φ3 of the inner circle is 2 to 3 times the diameter Φ1 of the oil hole.

[0032] A cylindrical countersunk hole is also provided between the inner circle and the oil hole. The inner diameter Φ4 of the cylindrical countersunk hole is 1.5 to 2 times the inner diameter Φ3 of the inner circle, and the depth L2 of the cylindrical countersunk hole is 0.7 to 1.0 times the height L1 of the fan-shaped groove.

[0033] The outer diameter Φ5 of the fan-shaped groove is smaller than the outer diameter Φ6 of the rear radial sealing groove.

[0034] The outer diameter Φ6 of the rear radial sealing groove is greater than the outer diameter Φ2 of the front radial sealing groove.

[0035] Example 2:

[0036] like Figure 3 、 Figure 4 As shown in the figure, the grooved oil guide sleeve structure of the present invention consists of a front radial sealing groove, a C-shaped segment, a rear radial sealing groove, and a grooved segment. The front and rear radial sealing grooves are located at both ends of the grooved oil guide sleeve, achieving a radial seal with the casing. The C-shaped segment is located in the middle of the grooved oil guide sleeve and connects the front and rear radial sealing grooves. The grooved segment is composed of multiple sector-shaped grooves.

[0037] The front and rear radial seal grooves are for installing seal rings. The C-shaped section can reduce weight and improve the toughness of the oil guide sleeve.

[0038] In this embodiment of the present invention, the sector groove angle θ of the groove section is 40°, the number n of the sector grooves is 4, and the sector groove height L1 is 1 times the oil passage diameter Φ1.

[0039] In the embodiment of the present invention, the inner diameter Φ3 of the sector groove of the groove section is twice the diameter Φ1 of the oil path, and the outer diameter Φ5 of the sector groove is smaller than the outer diameter Φ6 of the rear radial sealing groove, which is 0.8 times of Φ6.

[0040] In the embodiment of the present invention, the inner diameter Φ4 of the cylindrical countersunk hole of the groove section is 1.6 times the inner diameter Φ3 of the sector groove, and the depth L2 of the cylindrical countersunk hole is 0.75 times the height L1 of the sector groove.

[0041] The cylindrical counterbore allows the oil in the oil hole to enter, forming a buffer zone before entering the slightly smaller inner diameter of the sector groove, or the inner circle. This facilitates oil diversion through the sector groove at the inner circle. The aperture design also prevents oil from backwashing back into the oil hole. The sector groove, rather than other grooves or radial holes, is also used for this purpose. This structural design allows the oil to smoothly divert through the grooved oil guide sleeve and oil circuit without causing localized changes in oil pressure, resulting in a long service life.

[0042] In the embodiment of the present invention, the outer diameter Φ6 of the rear radial sealing groove is larger than the outer diameter Φ2 of the front radial sealing groove, which is 1.2 times of Φ6. This design is for ease of assembly.

[0043] like Figure 5 As shown, the casing oil circuit of the grooved oil guide sleeve structure of the present invention is L-shaped, and the oil circuit is turned after extending a short distance vertically at the outlet of the grooved oil guide sleeve.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the protection scope of the present invention.

Claims

1. A casing groove-shaped oil guide oil circuit structure, characterized in that: It includes a grooved oil guide sleeve and a casing oil circuit. The casing oil circuit is arranged between the front casing and the rear casing. The oil circuit of the front casing includes a radial oil circuit, and the oil circuit of the rear casing includes an axial oil circuit. The grooved oil guide sleeve is arranged between the radial oil circuit of the front casing and the axial oil circuit of the rear casing; the rear end of the grooved oil guide sleeve is provided with an axial oil inlet, the front end of the grooved oil guide sleeve is provided with a radial fan-shaped groove, and an oil hole is provided in the grooved oil guide sleeve to connect the oil inlet and the fan-shaped groove.

2. The casing groove-shaped oil guide channel structure according to claim 1, characterized in that: The grooved oil guide sleeve consists of a front radial sealing groove, a C-shaped section, a rear radial sealing groove and a grooved section; the front radial sealing groove and the rear radial sealing groove are respectively distributed in the front and rear sections of the grooved oil guide sleeve, and the C-shaped section is located in the middle section of the grooved oil guide sleeve; the grooved section includes multiple fan-shaped grooves, and the grooved section is arranged at the front end of the front radial sealing groove.

3. The casing groove-shaped oil guide channel structure according to claim 2, characterized in that: The angle θ of the fan-shaped groove is between 20° and 50°, and the number of the fan-shaped grooves is between 4 and 8.

4. The casing groove-shaped oil guide channel structure according to claim 2, characterized in that: The height L1 of the fan-shaped groove is 1 to 1.5 times the diameter Φ1 of the oil hole.

5. The casing groove-shaped oil guide channel structure according to claim 4, characterized in that: An inner circle connected to the oil hole is provided at the center of all the sector grooves, and the inner diameter Φ3 of the inner circle is 2 to 3 times the diameter Φ1 of the oil hole.

6. The casing groove-shaped oil guide channel structure according to claim 5, characterized in that: A cylindrical countersunk hole is also provided between the inner circle and the oil hole. The inner diameter Φ4 of the cylindrical countersunk hole is 1.5 to 2 times the inner diameter Φ3 of the inner circle, and the depth L2 of the cylindrical countersunk hole is 0.7 to 1.0 times the height L1 of the fan-shaped groove.

7. The casing groove-shaped oil guide channel structure according to claim 2, characterized in that: The outer diameter Φ5 of the fan-shaped groove is smaller than the outer diameter Φ6 of the rear radial sealing groove.

8. The casing groove-shaped oil guide channel structure according to claim 7, characterized in that: The outer diameter Φ6 of the rear radial sealing groove is greater than the outer diameter Φ2 of the front radial sealing groove.

Images