Turbine engine bearing oil supply lubrication cooling system
By designing a turbine engine bearing oil supply, lubrication and cooling system, the problem of lubrication and cooling of small turbine engine bearings in high-temperature environments was solved, achieving efficient lubrication and cooling and improving the overall performance of the turbine engine.
Patent Information
- Application Number
- CN202610502338.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-16
- Publication Date
- 2026-05-26
Smart Images
Figure CN122082849A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bearing lubrication and cooling technology in turbine engines, and in particular to a turbine engine bearing oil supply lubrication and cooling system. Background Technology
[0002] In recent years, the rapid development of unmanned aerial vehicles (UAVs) and small aircraft has also driven the development of small turbine engines. The casing of a small turbine engine contains a support structure to support the rotation of the drum shaft, which typically includes several bearings. During operation, small turbine engines are affected by heat transfer and radiation from high-temperature components, inevitably placing one bearing in the support structure under high-temperature conditions. Because the bearings in small turbine engines operate at high speeds and bear heavy loads, they already face very high requirements. On top of this, the high temperatures can cause the bearings to malfunction, directly affecting the overall performance of the small turbine engine.
[0003] Therefore, the design of bearing lubrication and cooling structures in small turbine engines has become one of the key technologies for the successful manufacture of turbine engines. Summary of the Invention
[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a turbine engine bearing oil supply, lubrication and cooling system that can both efficiently lubricate and efficiently cool the bearing.
[0005] To achieve the above objectives, the present invention provides a turbine engine bearing oil supply, lubrication and cooling system, including an engine tail cone, a bearing housing fixed to the engine tail cone, a support bearing, a drum shaft rotatably mounted in the support bearing, a sealing assembly and an oil supply passage.
[0006] The bearing housing has a seat support section extending toward the drum shaft. The drum shaft has a shaft support section extending into the seat support section and a shaft oil inlet chamber extending axially and penetrating the shaft support section. The support bearing is connected between the seat support section and the shaft support section. The sealing assembly is disposed between the seat support section and the shaft support section. A lubrication chamber distributed on the outside of the support bearing is provided between the support bearing and the sealing assembly. The end of the shaft oil inlet chamber away from the bearing housing is used to communicate with the combustion chamber.
[0007] The shaft oil inlet chamber is supplied with lubricating oil, and the shaft support section of the drum shaft is provided with a first oil port that penetrates the shaft support section. The shaft oil inlet chamber and the first oil port are connected, and the first oil port is connected to the lubrication chamber through the oil supply circuit.
[0008] Furthermore, the turbine engine bearing oil supply, lubrication and cooling system also includes a central oil inlet pipe fixed to the bearing housing. The central oil inlet pipe is inserted into the shaft oil inlet cavity of the bearing housing and the drum shaft. The central oil inlet pipe is provided with an oil inlet, a second oil port and an oil outlet that both pass through the central oil inlet pipe. The oil inlet supplies lubricating oil into the inner cavity of the central oil inlet pipe. The inner cavity of the central oil inlet pipe is connected to the shaft oil inlet cavity via the second oil port. The inner cavity of the central oil inlet pipe is connected to the shaft oil inlet cavity via the oil outlet.
[0009] A first gap is formed between the shaft support section of the drum shaft and the central oil inlet pipe. The first gap is part of the shaft oil inlet chamber. The second oil port and the first oil port are axially offset and both communicate with the first gap.
[0010] Furthermore, the turbine engine bearing oil supply, lubrication and cooling system is designed with an oil return structure to allow the lubricating oil after lubricating and cooling the support bearing to participate in combustion. The oil return structure has the following preferred structures.
[0011] The preferred structure for the oil return structure is as follows: the turbine engine bearing oil supply, lubrication and cooling system further includes an oil return circuit;
[0012] The sealing assembly includes a bearing front seal and a bearing rear seal arranged axially on both sides of the support bearing, and the lubrication cavity includes a front lubrication cavity formed between the support bearing and the bearing front seal, and a rear lubrication cavity formed between the support bearing and the bearing rear seal.
[0013] The oil return circuit includes an oil return channel located within the bearing housing and an oil supply chamber located within the bearing housing. The rear lubrication chamber, oil return channel, oil supply chamber, and lubricating oil inlet are sequentially connected. Thus, by providing an oil return channel within the bearing housing, the lubricating oil used for lubricating and cooling the supporting bearing is returned to the oil supply chamber and then transported to the combustion chamber for combustion via the central oil inlet pipe.
[0014] The preferred structure for the oil return structure is as follows: the turbine engine bearing oil supply, lubrication and cooling system further includes an oil return circuit;
[0015] The sealing assembly includes a bearing front seal disposed axially on the side of the support bearing near the combustion chamber of the turbine engine, and the lubrication cavity includes a front lubrication cavity formed between the support bearing and the bearing front seal, and a rear lubrication cavity formed on the side of the support bearing opposite to the bearing front seal.
[0016] The return oil path includes the first gap, the rear lubrication chamber is connected to the first gap, and the first gap is connected to the second oil port, the first oil port, the shaft oil inlet chamber, and the combustion chamber. Thus, the lubricating oil after lubricating and cooling the support bearing flows directly back to the first gap and is then transported to the combustion chamber for combustion.
[0017] The preferred structure for the oil return structure is as follows: the turbine engine bearing oil supply, lubrication and cooling system further includes an oil return circuit;
[0018] The sealing assembly includes a bearing front seal and a bearing rear seal arranged axially on both sides of the support bearing, and the lubrication cavity includes a front lubrication cavity formed between the support bearing and the bearing front seal, and a rear lubrication cavity formed between the support bearing and the bearing rear seal.
[0019] The oil return path includes an oil return channel located within the bearing housing and an oil supply chamber located within the bearing housing. The rear lubrication chamber, the oil return channel, the oil supply chamber, and the shaft inlet chamber of the drum shaft are sequentially connected. Thus, by providing an oil return channel within the bearing housing, the lubricating oil used for lubricating and cooling the supporting bearing is directly returned to the drum shaft and then transported to the combustion chamber for combustion.
[0020] The preferred structure for the oil return structure is as follows: the turbine engine bearing oil supply, lubrication and cooling system further includes an oil return circuit;
[0021] The sealing assembly includes a bearing front seal disposed axially on the side of the support bearing near the combustion chamber of the turbine engine, and the lubrication cavity includes a front lubrication cavity formed between the support bearing and the bearing front seal, and a rear lubrication cavity formed on the side of the support bearing opposite to the bearing front seal.
[0022] The return oil passage includes the rear lubrication chamber, which is connected to the shaft inlet oil chamber of the drum shaft. In this way, the lubricating oil used for lubricating and cooling the support bearing flows directly back into the drum shaft and is then transported to the combustion chamber for combustion.
[0023] The preferred structure of the oil return structure can be: the turbine engine bearing oil supply, lubrication and cooling system further includes an oil return passage and a turbine assembly fixed to the drum shaft;
[0024] The sealing assembly includes a bearing front seal and a bearing rear seal arranged axially on both sides of the support bearing, and the lubrication cavity includes a front lubrication cavity formed between the support bearing and the bearing front seal, and a rear lubrication cavity formed between the support bearing and the bearing rear seal.
[0025] The support bearing has an inner bearing ring, which is fixed to the outer periphery of the shaft support section of the drum shaft;
[0026] The oil return path includes a second gap formed between the bearing front seal and the bearing inner ring and / or shaft support section, a third gap formed between the bearing front seal and the drum shaft, and a fourth gap formed between the bearing housing and the turbine assembly. The engine tail cone is equipped with a tailjet flow channel, and the front lubrication chamber, the second gap, the third gap, the fourth gap, and the tailjet flow channel are sequentially connected. Thus, the lubricating oil after lubricating and cooling the support bearing enters the tailjet flow channel through the second gap, the third gap, and the fourth gap to participate in combustion.
[0027] Furthermore, the wheel engine bearing oil supply lubrication and cooling system also includes an engine oil supply pipe installed in the bearing housing, the bearing housing is provided with an oil supply chamber, the engine oil supply pipe is connected to the oil supply chamber, and the part of the central oil inlet pipe with a lubricating oil inlet is located in the oil supply chamber;
[0028] The lubricating oil inlet is located at one end of the central oil inlet pipe near the bearing housing, and the lubricating oil outlet is located at the end of the central oil inlet pipe away from the bearing housing;
[0029] The lubricating oil is a mixture of fuel oil and lubricating oil;
[0030] The central oil inlet pipe is provided with a plug at the lubricating oil outlet, and the lubricating oil outlet and the plug are arranged sequentially along the direction in which the lubricating oil enters the drum shaft.
[0031] Furthermore, the support bearing has an inner bearing ring, which is fixed to the outer periphery of the shaft support section of the drum shaft. The oil supply passage includes a third oil port that is opened on the inner bearing ring and passes through the inner bearing ring. The first oil port is connected to the lubrication cavity through the third oil port.
[0032] Furthermore, the turbine engine bearing oil supply, lubrication and cooling system also includes a locking nut fixed to the outer periphery of the shaft support section of the drum shaft. The support bearing has an inner bearing ring, and the locking nut abuts against the inner bearing ring. The oil supply passage includes a fourth oil port opened on the locking nut and passing through the locking nut. The first oil port is connected to the lubrication cavity through the fourth oil port.
[0033] Furthermore, the fourth oil port extends obliquely towards the support bearing as it moves further away from the shaft support section.
[0034] As described above, the turbine engine bearing oil supply, lubrication, and cooling system of the present invention has the following beneficial effects:
[0035] In this application, lubricating oil flows into the shaft oil inlet chamber of the drum shaft. The shaft oil inlet chamber of the drum shaft, the first oil port of the drum shaft, the oil supply line and the lubrication chamber are connected in sequence to form an oil circulation circuit. This efficiently lubricates and cools the support bearing, thereby increasing the lubrication and cooling effect of the support bearing and improving the performance and reliability of the turbine engine. Attached Figure Description
[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of the turbine engine bearing oil supply, lubrication and cooling system of this application.
[0037] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the turbine engine bearing oil supply, lubrication and cooling system of this application.
[0038] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the turbine engine bearing oil supply, lubrication and cooling system of this application.
[0039] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the turbine engine bearing oil supply, lubrication and cooling system of this application.
[0040] Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the turbine engine bearing oil supply, lubrication and cooling system of this application.
[0041] Figure 6 This is a schematic diagram of Embodiment Six of the Turbine Engine Bearing Oil Supply, Lubrication and Cooling System of this Application.
[0042] Component designation: Engine tail cone 10, tail jet channel 101, bearing housing 20, housing support section 21, oil return channel 22, oil supply chamber 23, drum shaft 30, shaft support section 31, first oil port 32, shaft oil inlet chamber 33, turbine assembly 40, support bearing 50, bearing inner ring 51, third oil port 52, bearing outer ring 53, center oil inlet pipe 60, lubricating oil inlet 61, second oil port 62, lubricating oil outlet 63, plug head 64, first clearance 71, second clearance 72, third clearance 73, fourth clearance 74, locking nut 80, fourth oil port 81, bearing front seal 91, bearing rear seal 92, front lubrication chamber 110, rear lubrication chamber 120, engine oil supply pipe 130. Detailed Implementation
[0043] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.
[0044] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.
[0045] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.
[0046] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.
[0047] This invention relates to a turbine engine bearing oil supply, lubrication, and cooling system. For ease of description, in the following embodiments, the axial direction of the turbine engine is defined as the longitudinal direction, and the longitudinal direction is the direction towards the oil inlet to the combustion chamber. Based on this, Figures 1 to 6 In the view shown, the left side of the paper represents the front direction, and the right side represents the back direction.
[0048] The following provides several preferred embodiments of a turbine engine bearing oil supply, lubrication, and cooling system.
[0049] Example 1 of a turbine engine bearing oil supply, lubrication and cooling system
[0050] like Figure 1As shown, an embodiment of the turbine engine bearing oil supply, lubrication, and cooling system includes an engine tail cone 10, a bearing housing 20 fixed to the engine tail cone 10 by several bolts, a support bearing 50, a drum shaft 30 rotatably mounted in the support bearing 50 and extending axially in the front-rear direction, a turbine assembly 40 fixedly connected to the drum shaft 30 by several bolts, a sealing assembly, and an oil supply passage. The engine tail cone 10 is used for fixed connection with the engine casing. The front end of the bearing housing 20 has a seat support section 21 extending forward toward the drum shaft 30 and into the turbine assembly 40, and the rear end of the drum shaft 30 has a shaft support section 31 extending rearward into the seat support section 21. The support bearing 50 is connected between the seat support section 21 and the shaft support section 31, and the sealing assembly is disposed between the seat support section 21 and the shaft support section 31. A lubrication cavity distributed on the outside of the support bearing 50 is provided between the support bearing 50 and the sealing assembly. The support bearing 50 has an inner bearing ring 51 and an outer bearing ring 53. The inner bearing ring 51 is fixed to the outer circumference of the shaft support section 31 of the drum shaft 30 and to the inner circumference of the seat support section 21 of the bearing housing 20. Preferably, the turbine engine bearing oil supply, lubrication and cooling system embodiment one further includes a locking nut 80, which is tightened to the outer circumference of the shaft support section 31 of the drum shaft 30 and abuts against the rear end of the inner bearing ring 51, thus screwing the inner bearing ring 51 and the shaft support section 31 of the drum shaft 30 together.
[0051] In particular, such as Figure 1 As shown, the drum shaft also has an axially extending oil inlet chamber 33 that runs through the shaft support section 31 from front to back. The oil inlet chamber 33 is supplied with lubricating oil, and the end of the oil inlet chamber 33 away from the bearing housing 20 is used to connect to the combustion chamber. The shaft support section 31 of the drum shaft 30 is provided with a first oil port 32 that runs through the shaft support section 31. The oil inlet chamber 33 and the first oil port 32 are connected, and the first oil port 32 is connected to the lubrication chamber through the oil supply passage. During the operation of the turbine engine, the oil pump continuously pumps lubricating oil into the shaft oil inlet chamber 33 of the drum shaft 30. The lubricating oil flows into the first oil port 32 of the drum shaft 30, and then flows into the lubrication chamber through the oil supply line. That is, the shaft oil inlet chamber 33 of the drum shaft 30, the first oil port 32 of the drum shaft 30, the oil supply line and the lubrication chamber are connected in sequence to form an oil circulation. While efficiently lubricating the support bearing 50, it also efficiently cools the support bearing 50, removing the frictional heat generated under high-speed rotation and the heat transferred from the surrounding high-temperature parts. A continuous oil film is formed between the raceway of the support bearing 50 and the rotor, which increases the lubrication and cooling effect of the support bearing 50, thereby improving the performance and reliability of the turbine engine and enhancing the overall performance of the turbine engine.
[0052] Furthermore, such as Figure 1As shown, the embodiment of the turbine engine bearing oil supply, lubrication and cooling system of this application further includes a central oil inlet pipe 60 extending axially in the front-rear direction. The central oil inlet pipe 60 is inserted into the bearing housing 20 and the drum shaft 30, and is fixed to the bearing housing 20. The central oil inlet pipe 60 is provided with a lubricating oil inlet 61 and a second oil port 62 that both penetrate the central oil inlet pipe 60. The lubricating oil inlet 61 and the second oil port 62 are both connected to the inner cavity of the central oil inlet pipe 60. The lubricating oil pumped in by the oil pump enters through the lubricating oil inlet 61. The inner cavity of the central oil inlet pipe 60 is connected to the shaft oil inlet cavity 33 through the second oil port 62, and the inner cavity of the central oil inlet pipe 60 is also connected to the shaft oil inlet cavity 33 through the lubricating oil outlet 63. The second oil port 62 and the first oil port 32 are distributed sequentially along the oil inlet direction, that is, from... Figure 1 From a viewing angle, the second oil port 62 is located to the right of the first oil port 32. Thus, during turbine engine operation, the lubricating oil pumped in by the oil pump flows into the central oil inlet pipe 60 through the lubricating oil inlet 61, enters the shaft oil inlet chamber 33 through the lubricating oil outlet 63, and then flows into the combustion chamber for combustion. Simultaneously, a portion of the lubricating oil also flows into the first oil port 32 of the drum shaft 30 through the second oil port 62 of the central oil inlet pipe 60, and then flows into the lubrication chamber through the oil supply path. Of course, in other embodiments, the central oil inlet pipe 60 can be omitted, and the shaft support section 31 of the drum shaft 30 can be appropriately extended, allowing the lubricating oil pumped in by the oil pump to flow directly into the shaft oil inlet chamber 33 of the drum shaft 30. The following description assumes the presence of a central oil inlet pipe 60.
[0053] In Embodiment 1 of the turbine engine bearing oil supply, lubrication, and cooling system, the engine tail cone 10, bearing housing 20, central oil inlet pipe 60, and bearing outer ring 53 are stator components, while the drum shaft 30, turbine assembly 40, bearing inner ring 51, and locking nut 80 are rotor components. The drum shaft 30 is the rotating shaft of the turbine engine and is connected to the combustion chamber via an oil slinger. Furthermore, a damping ring and an anti-rotation pin are provided between the bearing outer ring 53 supporting the bearing 50 and the bearing housing 20; both the damping ring and the anti-rotation pin are stator components.
[0054] Furthermore, the mixture of lubricating oil and fuel oil in this application, where the lubricating oil is used both to lubricate and cool the bearings, and also participates in combustion, or in other words, employs the oil supply structure found in turbine engines to both lubricate and cool the bearings. Based on this, as... Figure 1As shown, the turbine engine bearing oil supply lubrication and cooling system also includes an engine oil supply pipe 130 installed in the bearing housing 20. An oil supply chamber 23 is provided on the inner circumference of the rear end of the bearing housing 20. The inner end of the engine oil supply pipe 130 is connected to the oil supply chamber 23. The part of the central oil inlet pipe 60 with the lubricating oil inlet 61 is located in the oil supply chamber 23, so the engine oil supply pipe 130 is connected to the lubricating oil inlet 61 of the central oil inlet pipe 60 through the oil supply chamber 23. At the same time, the central oil inlet pipe 60 is also provided with a lubricating oil outlet 63 that penetrates the central oil inlet pipe 60, so the lubricating oil outlet 63 is connected to the inner cavity of the central oil inlet pipe 60. The lubricating oil inlet 61 is located at the front end of the central oil inlet pipe 60 near the bearing housing 20, and the lubricating oil outlet 63 is located at the rear end of the central oil inlet pipe 60 away from the bearing housing 20. Thus, the oil pump continuously fills the engine oil supply pipe 130 with a mixture of fuel and lubricating oil, i.e., lubricating oil; the lubricating oil fills the oil supply chamber 23 of the bearing housing 20, the inner cavity of the central oil inlet pipe 60 and the shaft oil inlet chamber 33 of the drum shaft 30, and the lubricating oil fills the entire circuit. Part of the lubricating oil flows into the combustion chamber for combustion; the other part of the lubricating oil enters the lubrication chamber through the second oil port 62, the first oil port 32 and the oil supply line for lubricating and cooling the support bearing 50.
[0055] Preferably, such as Figure 1 As shown, the central oil inlet pipe 60 is equipped with a plug head 64 at the lubricating oil outlet 63. The lubricating oil outlet 63 and the plug head 64 are arranged sequentially along the direction in which the lubricating oil enters the drum shaft 30, that is, the plug head 64 is located on the front end side of the lubricating oil outlet 63. In this way, the setting of the plug head 64 can increase the inlet pressure of the lubricating oil flowing forward from the lubricating oil outlet 63 into the drum shaft 30, thereby improving the stability of the oil supply.
[0056] Preferably, such as Figure 1 As shown, a first gap 71 is formed between the shaft support section 31 of the drum shaft 30 and the central oil inlet pipe 60. The first gap 71 is part of the shaft oil inlet chamber 33. The second oil port 62 and the first oil port 32 are axially offset and both communicate with the first gap 71, realizing the communication between the second oil port 62 and the first oil port 32. At the same time, the setting of the first gap 71 also reduces the risk of friction between the drum shaft 30 and the central oil inlet pipe 60.
[0057] Preferably, such as Figure 1 As shown, the sealing assembly includes a front bearing seal 91 and a rear bearing seal 92 axially disposed on both sides of the support bearing 50. The lubrication chamber includes a front lubrication chamber 110 formed between the support bearing 50 and the front bearing seal 91, and a rear lubrication chamber 120 formed between the support bearing 50 and the rear bearing seal 92. The front lubrication chamber 110 and the rear lubrication chamber 120 are connected, and an oil supply passage is connected to at least one of the front lubrication chamber 110 and the rear lubrication chamber 120. The front bearing seal 91 is preferably a brush seal, and the rear bearing seal 92 is preferably a magnetohydrodynamic seal.
[0058] Furthermore, in Embodiment 1 of the turbine engine bearing oil supply, lubrication, and cooling system, a ring-type oil supply structure is adopted. Specifically, as follows... Figure 1 As shown, the oil supply circuit includes a third oil port 52 that is opened on the inner ring 51 of the bearing and passes through the inner ring 51 of the bearing. There are two third oil ports 52, one in front and one in back. The first oil port 32 is connected to the front lubrication chamber 110 and the rear lubrication chamber 120 through the two third oil ports 52, respectively, to realize oil supply under the ring.
[0059] Furthermore, Embodiment 1 of the turbine engine bearing oil supply, lubrication, and cooling system also includes a return oil circuit. For example... Figure 1 As shown, the return oil path includes a return oil channel 22 located within the bearing housing 20. The rear lubrication chamber 120, the return oil channel 22, the oil supply chamber 23, and the lubricating oil inlet 61 are sequentially connected. The bearing front seal 91 blocks the front lubrication chamber 110, and the bearing rear seal 92 blocks the rear lubrication chamber 120. Thus, the lubricating oil used for lubricating and cooling the supporting bearing 50 flows into the return oil channel 22 of the bearing housing 20, and then returns to the central oil inlet pipe 60 via the oil supply chamber 23 of the bearing housing 20. In other embodiments, when the central oil inlet pipe 60 is not provided, the lubricating oil flowing into the return oil channel 22 of the bearing housing 20 directly returns to the shaft oil inlet chamber 33 of the drum shaft 30 via the oil supply chamber 23 of the bearing housing 20.
[0060] Example 2 of a turbine engine bearing oil supply, lubrication and cooling system
[0061] The difference between Embodiment 2 and Embodiment 1 of the turbine engine bearing oil supply, lubrication, and cooling system lies in the structure of the oil supply circuit. Embodiment 2 employs lateral oil supply. Specifically, as follows... Figure 2 As shown, in Embodiment 2 of the turbine engine bearing oil supply, lubrication, and cooling system, the oil supply path includes a fourth oil port 81 located on and passing through the locking nut 80. The first oil port 32 communicates with the rear lubrication chamber 120 via the fourth oil port 81. The fourth oil port 81 is preferably an oblique hole, extending at an angle so that it is closer to the support bearing 50 the further away from the shaft support section 31. Lateral oil supply eliminates the third oil port 52 on the bearing inner ring 51 in Embodiment 1, instead using the fourth oil port 81 on the locking nut 80 to supply oil to the rear lubrication chamber 120. When the locking nut 80 rotates at high speed with the drum shaft 30, it throws lubricating oil into the support bearing 50.
[0062] Example 3 of a turbine engine bearing oil supply, lubrication and cooling system
[0063] The difference between Embodiment 3 and Embodiment 1 of the turbine engine bearing oil supply, lubrication, and cooling system lies in the structure of the return oil circuit. Specifically, as follows: Figure 3As shown, the return oil path in Embodiment 3 of the turbine engine bearing oil supply, lubrication, and cooling system includes a second gap 72 formed between the inner circumference of the bearing front seal 91 and the outer circumference of the bearing inner ring 51 and / or shaft support section 31; a third gap 73 formed between the front end of the bearing front seal 91 and the drum shaft 30; and a fourth gap 74 formed between the bearing housing 20 and the turbine assembly 40. The fourth gap 74 includes an axial gap distributed around the outer circumference of the housing support section 21 and a radial gap distributed on the right side of the turbine assembly 40. The left end of the axial gap communicates with the third gap 73, the right end of the axial gap communicates with the inner end of the radial gap, and the outer end of the radial gap extends to the tail jet channel 101. The front lubrication chamber 110, the second gap 72, the third gap 73, the fourth gap 74, and the tail jet channel 101 are sequentially connected. In this way, the lubricating oil after lubricating and cooling the support bearing 50 flows into the third gap 73 through the second gap 72, and then flows into the tail jet channel 101 for combustion through the fourth gap 74, increasing thrust.
[0064] Example 4 of a turbine engine bearing oil supply, lubrication and cooling system
[0065] The difference between Embodiment 4 and Embodiment 3 of the turbine engine bearing oil supply, lubrication, and cooling system lies in the structure of the oil supply circuit. Embodiment 4 employs lateral oil supply. Specifically, as follows... Figure 4 As shown, in Embodiment 4 of the turbine engine bearing oil supply, lubrication and cooling system, the third oil port 52 on the inner ring 51 of the bearing in Embodiment 3 is removed, and a fourth oil port 81 with an oblique hole structure is provided on the locking nut 80 to supply oil to the support bearing 50 laterally.
[0066] Example 5 of a turbine engine bearing oil supply, lubrication and cooling system
[0067] The difference between Embodiment 5 of the turbine engine bearing oil supply, lubrication, and cooling system and Embodiment 1 lies in the structure of the return oil circuit. Specifically, as follows: Figure 5As shown, in Embodiment 5 of the turbine engine bearing oil supply, lubrication, and cooling system, the bearing rear seal 92 in Embodiment 1 is omitted, and the sealing assembly only includes the bearing front seal 91. Therefore, the rear lubrication chamber 120 is formed between the rear side of the support bearing 50 and the bearing housing 20. The return oil path includes the first gap 71 formed between the shaft support section 31 and the central oil inlet pipe 60. The rear lubrication chamber 120 and the first gap 71 are connected, and the first gap 71 is connected to the second oil port 62, the first oil port 32, and the combustion chamber. Thus, the lubricating oil in the rear lubrication chamber 120 flows through the first gap 71 to the central hole of the drum shaft 30, and then enters the combustion chamber for combustion via the oil slinger. In other embodiments, when the central oil inlet pipe 60 is not provided, the rear lubrication chamber 120 is connected to the shaft oil inlet chamber 33 of the drum shaft 30, and the lubricating oil in the rear lubrication chamber 120 flows directly back into the shaft oil inlet chamber 33 of the drum shaft 30.
[0068] Example 6 of a turbine engine bearing oil supply, lubrication and cooling system
[0069] The difference between Embodiment 6 and Embodiment 5 of the turbine engine bearing oil supply, lubrication, and cooling system lies in the structure of the oil supply circuit. Embodiment 6 employs a lateral oil supply system. Specifically, as follows... Figure 6 As shown, in Embodiment Six of the turbine engine bearing oil supply, lubrication and cooling system, the third oil port 52 on the inner ring 51 of the bearing in Embodiment Five is removed, and a fourth oil port 81 with an oblique hole structure is provided on the locking nut 80 to supply oil to the support bearing 50 laterally.
[0070] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0071] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.
Claims
1. A turbine engine bearing oil supply, lubrication, and cooling system, comprising an engine tail cone (10), a bearing housing (20) fixed to the engine tail cone (10), a support bearing (50), a drum shaft (30) rotatably mounted in the support bearing (50), and a sealing assembly, characterized in that: It also includes the oil supply system; The bearing housing (20) has a seat support section (21) extending toward the drum shaft (30), the drum shaft (30) has a shaft support section (31) extending into the seat support section (21), and a shaft oil inlet chamber (33) extending axially and penetrating the shaft support section (31), the support bearing (50) is connected between the seat support section (21) and the shaft support section (31), the sealing assembly is provided between the seat support section (21) and the shaft support section (31), a lubrication chamber distributed on the outside of the support bearing (50) is provided between the support bearing (50) and the sealing assembly, and the end of the shaft oil inlet chamber (33) away from the bearing housing (20) is used to communicate with the combustion chamber; The shaft oil inlet chamber (33) is supplied with lubricating oil. The shaft support section (31) of the drum shaft (30) is provided with a first oil port (32) that penetrates the shaft support section (31). The shaft oil inlet chamber (33) and the first oil port (32) are connected. The first oil port (32) is connected to the lubrication chamber through the oil supply passage.
2. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 1, characterized in that: It also includes a central oil inlet pipe (60) fixed to the bearing housing (20). The central oil inlet pipe (60) is inserted into the shaft oil inlet cavity (33) of the bearing housing (20) and the drum shaft (30). The central oil inlet pipe (60) is provided with a lubricating oil inlet (61), a second oil port (62) and a lubricating oil outlet (63) that both pass through the central oil inlet pipe (60). The lubricating oil inlet (61) allows lubricating oil to enter the inner cavity of the central oil inlet pipe (60). The inner cavity of the central oil inlet pipe (60) is connected to the shaft oil inlet cavity (33) through the second oil port (62). The inner cavity of the central oil inlet pipe (60) is also connected to the shaft oil inlet cavity (33) through the lubricating oil outlet (63). A first gap (71) is formed between the shaft support section (31) of the drum shaft (30) and the central oil inlet pipe (60). The first gap (71) is part of the shaft oil inlet chamber (33). The second oil port (62) and the first oil port (32) are axially offset and both communicate with the first gap (71).
3. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 2, characterized in that: It also includes the return oil circuit; The sealing assembly includes a bearing front seal (91) and a bearing rear seal (92) disposed axially on both sides of the support bearing (50), and the lubrication cavity includes a front lubrication cavity (110) formed between the support bearing (50) and the bearing front seal (91), and a rear lubrication cavity (120) formed between the support bearing (50) and the bearing rear seal (92). The return oil circuit includes a return oil channel (22) located in the bearing housing (20) and an oil supply chamber (23) located in the bearing housing (20). The rear lubrication chamber (120), the return oil channel (22), the oil supply chamber (23) and the lubricating oil inlet (61) are connected in sequence.
4. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 2, characterized in that: It also includes the return oil circuit; The sealing assembly includes a bearing front seal (91) disposed axially on the side of the support bearing (50) near the combustion chamber of the turbine engine, and the lubrication cavity includes a front lubrication cavity (110) formed between the support bearing (50) and the bearing front seal (91), and a rear lubrication cavity (120) formed on the side of the support bearing (50) opposite to the bearing front seal (91). The return oil circuit includes the first gap (71), the rear lubrication chamber (120) is connected to the first gap (71), and the first gap (71) is connected to the second oil port (62), the first oil port (32) and the combustion chamber.
5. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 2, characterized in that: It also includes an engine oil supply pipe (130) installed in the bearing housing (20), the bearing housing (20) is provided with an oil supply chamber (23), the engine oil supply pipe (130) is connected to the oil supply chamber (23), and the part of the central oil inlet pipe (60) with a lubricating oil inlet (61) is located in the oil supply chamber (23); The lubricating oil inlet (61) is located at one end of the central oil inlet pipe (60) near the bearing housing (20), and the lubricating oil outlet (63) is located at one end of the central oil inlet pipe (60) away from the bearing housing (20); The lubricating oil is a mixture of fuel oil and lubricating oil; The central oil inlet pipe (60) is provided with a plug (64) at the lubricating oil outlet (63), and the lubricating oil outlet (63) and the plug (64) are arranged sequentially along the direction of lubricating oil entering the drum shaft (30).
6. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 1, characterized in that: It also includes the return oil circuit; The sealing assembly includes a bearing front seal (91) and a bearing rear seal (92) disposed axially on both sides of the support bearing (50), and the lubrication cavity includes a front lubrication cavity (110) formed between the support bearing (50) and the bearing front seal (91), and a rear lubrication cavity (120) formed between the support bearing (50) and the bearing rear seal (92). The return oil circuit includes a return oil channel (22) located in the bearing housing (20) and an oil supply chamber (23) located in the bearing housing (20). The rear lubrication chamber (120), the return oil channel (22), the oil supply chamber (23) and the shaft oil inlet chamber (33) of the drum shaft (30) are connected in sequence.
7. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 1, characterized in that: It also includes the return oil circuit; The sealing assembly includes a bearing front seal (91) disposed axially on the side of the support bearing (50) near the combustion chamber of the turbine engine, and the lubrication cavity includes a front lubrication cavity (110) formed between the support bearing (50) and the bearing front seal (91), and a rear lubrication cavity (120) formed on the side of the support bearing (50) opposite to the bearing front seal (91). The return oil circuit includes the rear lubrication chamber (120), which is connected to the shaft oil inlet chamber (33) of the drum shaft (30).
8. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 1, characterized in that: It also includes a return oil passage and a turbine assembly (40) fixed to the drum shaft (30); The sealing assembly includes a bearing front seal (91) and a bearing rear seal (92) disposed axially on both sides of the support bearing (50), and the lubrication cavity includes a front lubrication cavity (110) formed between the support bearing (50) and the bearing front seal (91), and a rear lubrication cavity (120) formed between the support bearing (50) and the bearing rear seal (92). The support bearing (50) has an inner bearing ring (51) which is fixed to the outer periphery of the shaft support section (31) of the drum shaft (30); The return oil passage includes a second gap (72) formed between the bearing front seal (91) and the bearing inner ring (51) and / or the shaft support section (31), a third gap (73) formed between the bearing front seal (91) and the drum shaft (30), and a fourth gap (74) formed between the bearing housing (20) and the turbine assembly (40). The engine tail cone (10) is provided with a tail jet channel (101). The front lubrication chamber (110), the second gap (72), the third gap (73), the fourth gap (74) and the tail jet channel (101) are connected in sequence.
9. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 1, characterized in that: The support bearing (50) has an inner bearing ring (51), which is fixed to the outer periphery of the shaft support section (31) of the drum shaft (30). The oil supply passage includes a third oil port (52) opened on the inner bearing ring (51) and passing through the inner bearing ring (51). The first oil port (32) is connected to the lubrication cavity through the third oil port (52).
10. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 1, characterized in that: It also includes a locking nut (80) fixed to the outer periphery of the shaft support section (31) of the drum shaft (30), the support bearing (50) has a bearing inner ring (51), the locking nut (80) abuts against the bearing inner ring (51), the oil supply passage includes a fourth oil port (81) opened on the locking nut (80) and passing through the locking nut (80), the first oil port (32) is connected to the lubrication cavity through the fourth oil port (81).
11. The turbine engine bearing oil supply, lubrication, and cooling system according to claim 11, characterized in that: The fourth oil port (81) extends obliquely towards the support bearing (50) the further away from the shaft support section (31).