Engine bearing structure

Abstract

The invention relates to the technical field of engines, in particular to an engine bearing structure. The engine bearing structure comprises a bearing seat, a first roller bearing, a second roller bearing and an angular contact ball bearing, outer rings of the first roller bearing, the second roller bearing and the angular contact ball bearing are fixedly connected to the interior of the bearing seat, the bearing seat is provided with an oil cavity used for storing lubricating oil, and the bearing seat is provided with a plurality of oil injection ports communicated with the oil cavity. Lubricating oil can be injected to the first roller bearing, the second roller bearing and the angular contact ball bearing from the multiple oil injection openings. The oil cavity provides lubricating oil for the first roller bearing, the second roller bearing and the angular contact ball bearing through the multiple oil injection ports, the first roller bearing, the second roller bearing and the angular contact ball bearing can be fully lubricated, the first roller bearing, the second roller bearing and the angular contact ball bearing are cooled, the bearings are prevented from being damaged, and the service life of the bearings is prolonged. The aircraft flight safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an engine bearing structure. Background Art

[0002] As the power unit of the aircraft, the functions and performance of the aircraft engine should be able to meet various flight conditions so that the aircraft can operate reliably within the specified operating envelope and flight attitude. Bearings are important parts in the engine system. Bearings will generate heat during continuous operation, causing bearing wear, affecting the normal operation of the bearings and thus affecting the safe flight of the aircraft.

[0003] Therefore, an engine bearing structure is urgently needed to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide an engine bearing structure, which can provide lubricating oil to the bearing, lubricate and cool the bearing, prevent the bearing from being damaged, and ensure the flight safety of the aircraft.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An engine bearing structure comprises: a bearing seat, a first roller bearing, a second roller bearing and an angular contact ball bearing, wherein the outer rings of the first roller bearing, the second roller bearing and the angular contact ball bearing are all fixedly connected to the interior of the bearing seat, the bearing seat is provided with an oil cavity, the oil cavity is used to store lubricating oil, the bearing seat is provided with a plurality of oil injection ports connected to the oil cavity, and the lubricating oil can be sprayed from the plurality of oil injection ports to the first roller bearing, the second roller bearing and the angular contact ball bearing.

[0007] As a preferred technical solution of the above engine bearing structure, the cavity wall of the oil cavity is provided with a plurality of first oil injection ports, the plurality of first oil injection ports are arranged at intervals, and the plurality of first oil injection ports are all aligned with the first roller bearing.

[0008] As a preferred technical solution of the above engine bearing structure, the cavity wall of the oil cavity is provided with a plurality of second oil injection ports, the plurality of second oil injection ports are arranged at intervals, and the plurality of second oil injection ports are aligned with the angular contact ball bearing.

[0009] As a preferred technical solution of the above engine bearing structure, the cavity wall of the oil cavity is provided with a plurality of third oil injection ports, the plurality of the third oil injection ports are arranged at intervals, and the plurality of the third oil injection ports are aligned with the second roller bearing.

[0010] As a preferred technical solution of the above engine bearing structure, the engine bearing structure further includes a lubricating oil pump, the bearing seat is provided with an oil inlet, and both ends of the oil inlet are respectively connected to the lubricating oil pump and the oil chamber.

[0011] As a preferred technical solution of the above-mentioned engine bearing structure, the engine bearing structure also includes an oil return pump, and the bearing seat is provided with an oil outlet, one end of the oil outlet is connected to the oil return pump, and the other end of the oil outlet is connected to the inside of the bearing seat, so that the lubricating oil flowing through the first roller bearing, the second roller bearing and the angular contact ball bearing flows into the oil outlet.

[0012] As a preferred technical solution of the above engine bearing structure, the engine bearing structure further includes a pressure plate, the pressure plate is fixed to the bearing seat, and the outer ring of the first roller bearing is fixedly connected to the pressure plate.

[0013] As a preferred technical solution of the above engine bearing structure, the engine bearing structure further comprises an end cover, and the end cover is provided with an end portion of the bearing seat.

[0014] As a preferred technical solution of the above engine bearing structure, the end cover is provided with an outer stop, the end surface of the bearing seat is provided with an inner stop, and the outer stop is embedded in the inner stop.

[0015] As a preferred technical solution of the above engine bearing structure, the engine bearing structure further includes a sealing member, and the sealing member is arranged between the outer stopper and the inner stopper.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides an engine bearing structure. The engine bearing structure comprises: a bearing seat, a first roller bearing, a second roller bearing and an angular contact ball bearing, wherein the outer rings of the first roller bearing, the second roller bearing and the angular contact ball bearing are fixedly connected to the inside of the bearing seat, the bearing seat is provided with an oil cavity, the oil cavity is used to store lubricating oil, the bearing seat is provided with a plurality of oil injection ports connected with the oil cavity, and the lubricating oil can be sprayed from the plurality of oil injection ports to the first roller bearing, the second roller bearing and the angular contact ball bearing. The oil cavity provides lubricating oil to the first roller bearing, the second roller bearing and the angular contact ball bearing through the plurality of oil injection ports, so that the first roller bearing, the second roller bearing and the angular contact ball bearing can be fully lubricated, and the first roller bearing, the second roller bearing and the angular contact ball bearing can be cooled, so as to prevent the first roller bearing, the second roller bearing and the angular contact ball bearing from being overheated, prevent the bearings from being damaged, and ensure the flight safety of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0019] Figure 1 A cross-sectional view of the engine bearing structure provided by an embodiment of the present invention Figure 1 ;

[0020] Figure 2 A cross-sectional view of the engine bearing structure provided by an embodiment of the present invention Figure 2 ;

[0021] Figure 3 A schematic structural diagram of a bearing seat provided in an embodiment of the present invention.

[0022] In the figure:

[0023] 1. Bearing seat; 11. Oil chamber; 12. Oil inlet; 13. Oil outlet; 2. First roller bearing; 3. Second roller bearing; 4. Angular contact ball bearing; 5. First oil injection port; 6. Second oil injection port; 7. Third oil injection port; 8. Pressure plate; 9. End cover. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] like Figures 1 to 3 As shown, the present invention provides an engine bearing structure. The engine bearing structure comprises: a bearing seat 1, a first roller bearing 2, a second roller bearing 3 and an angular contact ball bearing 4.

[0029] Specifically, the outer rings of the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 are all fixedly connected to the inside of the bearing seat 1, and the bearing seat 1 is provided with an oil chamber 11, the oil chamber 11 is used to store lubricating oil, and the bearing seat 1 is provided with a plurality of oil injection ports connected to the oil chamber 11, and the lubricating oil can be sprayed from the plurality of oil injection ports to the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4. The oil chamber 11 provides lubricating oil to the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 through the plurality of oil injection ports, so that the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 can be fully lubricated, and the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 can be cooled, so as to prevent the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 from being overheated, and to prevent the bearings from being damaged, so as to ensure the flight safety of the aircraft. It should be noted that the first roller bearing 2 and the second roller bearing 3 are both used to transmit radial loads, and the angular contact ball bearing 4 is used to transmit axial loads.

[0030] Furthermore, the bearing seat 1 is a hollow structure, and the outer rings of the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 are all fixedly mounted on the inner wall of the bearing seat 1, and the first roller bearing 2 and the second roller bearing 3 are arranged at intervals, and the angular contact ball bearing 4 is located between the first roller bearing 2 and the second roller bearing 3. The oil chamber 11 is arranged inside the bearing seat 1, and an annular oil circuit is arranged inside the bearing seat 1, and the oil chamber 11 is connected to the annular oil circuit. A plurality of oil injection ports are arranged in the annular oil circuit, which can enable the lubricating oil to be fully sprayed on the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4, so as to lubricate and cool the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4.

[0031] Optionally, the cavity wall of the oil cavity 11 is provided with a plurality of first oil injection ports 5, the plurality of first oil injection ports 5 are evenly spaced along the circumference of the inner wall of the bearing seat 1, the plurality of first oil injection ports 5 are provided between the first roller bearing 2 and the angular contact ball bearing 4, and the plurality of first oil injection ports 5 are all tilted toward the first roller bearing 2 to provide lubricating oil to the first roller bearing 2, so that the first roller bearing 2 is lubricated and cooled.

[0032] Optionally, the cavity wall of the oil cavity 11 is provided with a plurality of second oil injection ports 6, the plurality of second oil injection ports 6 are evenly spaced along the circumference of the inner wall of the bearing seat 1, the plurality of second oil injection ports 6 are provided between the second roller bearing 3 and the angular contact ball bearing 4, and the plurality of second oil injection ports 6 are all tilted toward the angular contact ball bearing 4 to provide lubricating oil to the angular contact ball bearing 4, so that the angular contact ball bearing 4 is lubricated and cooled.

[0033] Optionally, the cavity wall of the oil cavity 11 is provided with a plurality of third oil injection ports 7, the plurality of third oil injection ports 7 are evenly spaced along the circumference of the inner wall of the bearing seat 1, the plurality of third oil injection ports 7 are arranged between the second roller bearing 3 and the angular contact ball bearing 4, and the plurality of third oil injection ports 7 are all tilted toward the second roller bearing 3 to provide lubricating oil to the second roller bearing 3, so that the second roller bearing 3 is lubricated and cooled.

[0034] Furthermore, the plurality of second oil injection ports 6 and the plurality of third oil injection ports 7 are arranged in one-to-one correspondence, and the second oil injection ports 6 and the third oil injection ports 7 of the same group are arranged back to back, which can reduce the installation space of the second oil injection ports 6 and the third oil injection ports 7.

[0035] Optionally, the engine bearing structure also includes a lubricating oil pump, and the bearing seat 1 is provided with an oil inlet 12. The two ends of the oil inlet 12 are respectively connected to the lubricating oil pump and the oil chamber 11. Lubricating oil with a certain temperature and pressure is pumped into the oil chamber 11 by the lubricating oil pump, which can accelerate the flow of the lubricating oil, so that the flow of the lubricating oil can take away the heat generated by the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 as soon as possible, thereby accelerating the heat dissipation.

[0036] Optionally, the engine bearing structure also includes an oil return pump, and the bearing seat 1 is provided with an oil outlet 13, one end of the oil outlet 13 is connected to the oil return pump, and the other end of the oil outlet 13 is connected to the inside of the bearing seat 1, so that the lubricating oil flowing through the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4 flows into the oil outlet 13. The pumping pressure of the lubricating oil pump and the suction pressure of the oil return pump can further accelerate the flow speed of the lubricating oil and further improve the cooling effect; at the same time, the oil return pump and the lubricating oil pump are both connected to the lubricating oil tank, so that the lubricating oil in the bearing seat 1 can always maintain an oil volume that can meet the current working conditions, thereby realizing the recycling of the lubricating oil.

[0037] Optionally, the engine bearing structure further includes a pressure plate 8, which is fixed to the inner wall of the bearing seat 1, and the outer ring of the first roller bearing 2 is fixedly connected to the pressure plate 8, so that the first roller bearing 2 is firmly installed and the stability of the first roller bearing 2 is improved. Furthermore, the screw passes through the pressure plate 8 and is threadedly connected to the bearing seat 1, thereby fixing the pressure plate 8 to the bearing seat 1.

[0038] Optionally, the engine bearing structure further includes an end cover 9, which is provided with an end portion of the bearing seat 1 and is used to seal the internal space of the bearing seat 1 to prevent leakage of lubricating oil.

[0039] Furthermore, the end cover 9 is provided with an outer stop, and the end face of the bearing seat 1 is provided with an inner stop, and the outer stop is embedded in the inner stop, thereby ensuring the sealing effect while realizing a detachable connection, which is convenient for the inspection, maintenance and replacement of the first roller bearing 2, the second roller bearing 3 and the angular contact ball bearing 4.

[0040] Optionally, the engine bearing structure further includes a seal, which is arranged between the outer stop and the inner stop, and can further improve the sealing performance of the bearing seat 1.

[0041] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An engine bearing structure, characterized in that: include: A bearing seat (1), a first roller bearing (2), a second roller bearing (3) and an angular contact ball bearing (4); the outer rings of the first roller bearing (2), the second roller bearing (3) and the angular contact ball bearing (4) are all fixedly connected to the interior of the bearing seat (1); the bearing seat (1) is provided with an oil chamber (11); the oil chamber (11) is used to store lubricating oil; the bearing seat (1) is provided with a plurality of oil injection ports connected to the oil chamber (11); the lubricating oil can be injected from the plurality of oil injection ports to the first roller bearing (2), the second roller bearing (3) and the angular contact ball bearing (4).

2. The engine bearing structure according to claim 1, characterized in that: The cavity wall of the oil cavity (11) is provided with a plurality of first oil injection ports (5), the plurality of first oil injection ports (5) are arranged at intervals, and the plurality of first oil injection ports (5) are all aligned with the first roller bearing (2).

3. The engine bearing structure according to claim 1, characterized in that: The cavity wall of the oil cavity (11) is provided with a plurality of second oil injection ports (6), the plurality of second oil injection ports (6) are arranged at intervals, and the plurality of second oil injection ports (6) are aligned with the angular contact ball bearing (4).

4. The engine bearing structure according to claim 1, characterized in that: The cavity wall of the oil cavity (11) is provided with a plurality of third oil injection ports (7), the plurality of third oil injection ports (7) are arranged at intervals, and the plurality of third oil injection ports (7) are aligned with the second roller bearing (3).

5. The engine bearing structure according to claim 1, characterized in that: The engine bearing structure also includes a lubricating oil pump. The bearing seat (1) is provided with an oil inlet (12). Both ends of the oil inlet (12) are respectively connected to the lubricating oil pump and the oil chamber (11).

6. The engine bearing structure according to claim 1, characterized in that: The engine bearing structure also includes an oil return pump, and the bearing seat (1) is provided with an oil outlet (13), one end of the oil outlet (13) is connected to the oil return pump, and the other end of the oil outlet (13) is connected to the inside of the bearing seat (1), so that the lubricating oil flowing through the first roller bearing (2), the second roller bearing (3) and the angular contact ball bearing (4) flows into the oil outlet (13).

7. The engine bearing structure according to claim 1, characterized in that: The engine bearing structure also includes a pressure plate (8), the pressure plate (8) is fixed to the bearing seat (1), and the outer ring of the first roller bearing (2) is fixedly connected to the pressure plate (8).

8. The engine bearing structure according to any one of claims 1 to 7, characterized in that: The engine bearing structure further comprises an end cover (9), and the end cover (9) is provided with an end portion of the bearing seat (1).

9. The engine bearing structure according to claim 8, characterized in that: The end cover (9) is provided with an outer stop, the end surface of the bearing seat (1) is provided with an inner stop, and the outer stop is embedded in the inner stop.

10. The engine bearing structure according to claim 9, characterized in that: The engine bearing structure further comprises a sealing member, and the sealing member is arranged between the outer stop and the inner stop.

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