Electrically driven centrifugal oil and gas separator
By directly driving the hollow shaft and oil slinger with a motor, the design solves the problems of insufficient separation accuracy and energy loss in traditional centrifugal oil-gas separators, achieving efficient and low-energy oil-gas separation and simplifying the maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU E&E TURBO POWER
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-16
AI Technical Summary
Traditional centrifugal oil-gas separators suffer from insufficient separation accuracy, severe energy loss, and complex maintenance, especially due to speed fluctuations caused by gear transmission and reduced efficiency under high-temperature conditions.
The hollow shaft and oil slinger are directly driven by a motor, and stable centrifugal force is achieved through high speed, which improves separation accuracy and reduces shaft power loss. The structural design allows the centrifugal oil-gas separator to be independent of the gear box, which is convenient for maintenance.
It improves oil-gas separation efficiency, reduces energy consumption, and simplifies the maintenance process, achieving efficient and flexible oil-gas separation.
Smart Images
Figure CN224358611U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aero-engines, specifically to an electrically driven centrifugal oil-gas separator for aero-engines. Background Technology
[0002] Oil-gas separators are essential components of many aero engines. With the development of the low-altitude economy, more and more organizations and enterprises are investing in aero engine research and development. An oil-gas separator is a device designed to separate gases from the lubricating oil after it has been used, thereby reducing the gas content in the oil and ensuring the safe and reliable operation of the lubrication system. Centrifugal oil-gas separators are commonly used to separate oil and gas; however, centrifugal oil-gas separators have the following drawbacks.
[0003] Insufficient separation accuracy: Traditional centrifugal oil-gas separators often use gear transmission drive (i.e., the power output from the motor is transmitted to the gear transmission). During the gear transmission operation, there are speed fluctuations. Speed fluctuations lead to unstable centrifugal force, resulting in insufficient separation accuracy of the oil-gas separator and accelerated performance degradation.
[0004] Significant energy loss: Gear transmission efficiency is typically 75-80%, and the lubricating oil has a long heat dissipation path, while the motor operates in a high-temperature (>120℃) environment. The motor's efficiency decreases after a period of use, resulting in high energy consumption throughout the centrifugal separation process.
[0005] High maintenance complexity: Traditional centrifugal oil-gas separators are often located inside the gearbox of an aircraft engine, and the gearbox must be disassembled to remove the oil-gas separator. Utility Model Content
[0006] This invention provides an electrically driven centrifugal oil-gas separator with high separation efficiency and reduced power loss.
[0007] The technical solutions to the above technical problems are as follows:
[0008] An electrically driven centrifugal oil-gas separator, including a motor, also includes:
[0009] A hollow shaft passes through the motor, and one end of the hollow shaft is fixed to the motor.
[0010] The oil inlet body has a first cavity and an oil inlet hole that communicates with the first cavity, and the other end of the hollow shaft is located in the first cavity;
[0011] An oil-gas separator is fixed at one end to the oil inlet body. The oil-gas separator has a first through hole along the axial direction and an oil drain hole communicating with the first through hole on the circumferential surface of the oil-gas separator.
[0012] An oil slinger is located in the first through hole. The oil slinger is fixed to the hollow shaft. The oil slinger has a second oil slinger hole in the circumferential direction. The hollow shaft and the second oil slinger hole are connected.
[0013] The connecting seat is fitted onto the hollow shaft. The motor is fixed to one end of the connecting seat, and the other end of the connecting seat is fixed to the other end of the oil-gas separator.
[0014] This utility model has the following features:
[0015] The lubricating oil and air two-phase flow requiring oil-gas separation are introduced into the centrifugal oil-gas separator through pipelines. A motor directly drives the hollow shaft and oil slinger, resulting in high-speed operation that improves oil-gas separation efficiency, minimizes speed fluctuations, stabilizes centrifugal force, and achieves high separation accuracy. The direct-drive method significantly reduces shaft power loss and shortens the heat dissipation path. Furthermore, the centrifugal oil-gas separator does not need to be housed inside a gearbox, simplifying maintenance. Therefore, this invention offers advantages such as high separation efficiency, lower power consumption, and flexible installation. Attached Figure Description
[0016] Figure 1 This is a three-dimensional view of a centrifugal oil-gas separator.
[0017] Figure 2 This is a cross-sectional view of a centrifugal oil-gas separator.
[0018] Figure 3 This is a cross-sectional view of the oil-gas separator.
[0019] Figure 4 This is an assembly drawing of the hollow shaft and the oil slinger.
[0020] Figure label:
[0021] Motor 1, stator 1a, bearing 1b, rotor 1c, connecting sleeve 1d, fastener 1e, hollow shaft 2, assembly hole 2a, oil inlet body 3, first cavity 3a, oil inlet hole 3b, first bearing 3c, oil-gas separator seat 4, first through hole 4a, oil drain hole 4b, main seat 4c, first axial protrusion 4c1, first hole 4a1, second hole 4a2, third hole 4a3, isolation seat 4d, second axial protrusion 4d1, protrusion 4e, first sealing ring 4f, second sealing ring 4g, connecting seat 5, second oil slinger hole 6, first oil slinger plate 7, second oil slinger plate 8, notch 9. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation.
[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing" and other such terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components, unless otherwise explicitly limited.
[0026] like Figures 1 to 4 As shown, the electrically driven centrifugal oil-gas separator of this utility model includes a motor 1, a hollow shaft 2, an oil inlet body 3, an oil-gas separation seat 4, an oil slinger plate, and a connecting seat 5. The following is a detailed description of each part and the relationship between them.
[0027] Motor 1 preferably adopts a high-speed permanent magnet motor (speed of at least 2000 revolutions per minute). Motor 1 includes stator 1a, bearing 1b, rotor 1c, connecting sleeve 1d, and fastener 1e. Stator 1a is connected to rotor 1c through bearing 1b. Connecting sleeve 1d is located on one side of rotor 1c and fixed to rotor 1c. The circumferential surface of connecting sleeve 1d is provided with radial threaded holes. Fastener 1e is threadedly connected to the threaded holes on connecting sleeve 1d.
[0028] Hollow shaft 2 passes through motor 1, and one end of hollow shaft 2 is fixed to motor 1. Hollow shaft 2 passes through rotor 1c and connecting sleeve 1d. There is a mounting hole 2a on the circumferential surface of hollow shaft 2. After fastener 1e is threadedly connected to the threaded hole on connecting sleeve 1d, the end of fastener 1e is inserted into mounting hole 2a. The end of fastener 1e inserted into mounting hole 2a is tapered. Fastener 1e is fixed to hollow shaft 2 in the circumferential direction on the one hand, and on the other hand, fastener 1e provides axial limit for hollow shaft 2.
[0029] The oil inlet body 3 is provided with a first cavity 3a and an oil inlet hole 3b that communicates with the first cavity 3a. The other end of the hollow shaft 2 is located in the first cavity 3a. The oil inlet body 3 is a cylindrical body with an opening at one end and a closed shape at the other end. A first bearing 3c is installed in the first cavity 3a. The other end of the hollow shaft 2 is connected to the first bearing 3c.
[0030] One end of the oil-gas separator 4 is fixed to the oil inlet body 3. A first through hole 4a is provided along the axial direction on the oil-gas separator 4. An oil drain hole 4b communicating with the first through hole 4a is provided on the circumferential surface of the oil-gas separator 4. The axial direction of the oil drain hole 4b is not parallel to the radial direction of the oil-gas separator 4. The oil-gas separator 4 includes a main seat 4c and an isolation seat 4d. A first axial protrusion 4c1 is provided on the axial end face of one end of the main seat 4c. The first through hole 4a includes a first hole 4a1, a second hole 4a2, and a third hole 4a3. The diameter of the second hole 4a2 is larger than the diameters of the first hole 4a1 and the third hole 4a3. The second hole 4a2 is located between the first hole 4a1 and the third hole 4a3. The first hole 4a1 and the second hole 4a2 are opened on the main seat 4c. One end of the isolation seat 4d mates with the second hole 4a2, and the third hole 4a3 is opened on the isolation seat 4d. The other end of the isolation seat 4d is engaged with the first cavity 3a. The axial end face of the other end of the isolation seat 4d is provided with a second axial protrusion 4d1, which is inserted into the first cavity 3a.
[0031] The circumferential surface of the isolation seat 4d is provided with a radial protrusion 4e. When the oil-gas separator 4 and the oil inlet body 3 are fastened by bolts, the radial protrusion 4e is clamped between the main seat 4c and the oil inlet body 3, so that the isolation seat 4d cannot move axially relative to the main seat 4c.
[0032] The oil-gas separator 4 also includes a first sealing ring 4f and a second sealing ring 4g. A first annular groove is provided on the circumferential surface of the isolation seat 4d, and a second annular groove is provided on the axial end face of the isolation seat 4d facing the oil inlet body 3. The first sealing ring 4f is located between the main seat 4c and the isolation seat 4d and cooperates with the first annular groove. The first sealing ring 4f forms a seal for the gap between the main seat 4c and the isolation seat 4d. The second sealing ring 4g is located between the isolation seat 4d and the oil inlet body 3 and cooperates with the second annular groove. The second sealing ring 4g forms a seal for the gap between the isolation seat 4d and the oil inlet body 3.
[0033] The oil slinger is located in the first through hole 4a. In this invention, the oil slinger is located in the second hole 4a2. The oil slinger is fixed to the hollow shaft 2. The oil slinger has a second oil slinging hole 6 in the circumferential direction. The hollow shaft and the second oil slinging hole are connected.
[0034] The oil slinger includes a first oil slinger 7 and a second oil slinger 8 located downstream of the first oil slinger 7. The hollow shaft 2 in this invention consists of two sections, with the first section fixed to the first oil slinger 7 and the second section fixed to the second oil slinger 8. The first oil slinger 7 and the second oil slinger 8 are fixed, but they are not axially connected. Therefore, the two sections of the hollow shaft 2 are axially blocked by the first oil slinger 7 or the second oil slinger 8, meaning that fluid media such as air cannot flow directly from one end of the hollow shaft 2 to the other end along the axial direction. The first oil slinger 7 and the second oil slinger 8 are each provided with a second oil slinger hole 6. The outer diameter of the first oil slinger 7 is larger than the outer diameter of the second oil slinger 8. A notch 9 is provided on the circumferential surface of the first oil slinger 7.
[0035] The connecting seat 5 is fitted onto the hollow shaft 2. The motor 1 is fixed to one end of the connecting seat 5, and the other end of the connecting seat 5 is fixed to the other end of the oil-gas separator seat 4. One end of the stator 1a is located outside the rotor 1c. One end of the stator 1a is fastened to the connecting seat 5 by screws. The first axial protrusion 4c1 extends into the inner hole of the connecting seat 5. The connecting seat 5 and the main seat 4c are fastened together by screws.
[0036] The working process of this utility model is as follows:
[0037] The lubricating oil-air mixture enters the first cavity 3a through the oil inlet 3b. The lubricating oil-air mixture enters the first section of the hollow shaft 2 through the other end of the hollow shaft 2. The lubricating oil-air mixture flows along the axial direction of the first section of the hollow shaft 2 into the second oil-throwing hole 6 on the first oil-throwing plate 7. As the motor 1 drives the entire hollow shaft 2 to rotate at high speed when it is working, the lubricating oil is thrown towards the oil-gas separator 4 under the action of centrifugal force. Since the lubricating oil thrown onto the inner wall of the oil-gas separator 4 has kinetic energy, the lubricating oil flows on the inner wall of the oil-gas separator 4 and is finally output from the oil outlet 4b.
[0038] Because of its lower density, air is distributed in the first hollow shaft 2 and the second oil-throwing hole 6 on the first oil-throwing plate 7. As the lubricating oil-air mixture continues to enter the first hollow shaft 2, the gas pressure increases, and air flows out from the second oil-throwing hole 6 on the first oil-throwing plate 7. Then, it enters the second hollow shaft 2 from the second oil-throwing hole 6 on the second oil-throwing plate 8. As the amount of air entering the second hollow shaft 2 through the second oil-throwing hole 6 on the second oil-throwing plate 8 increases, the air is discharged to the outside through the second hollow shaft 2.
Claims
1. An electrically driven centrifugal oil-gas separator, comprising a motor (1), characterized in that, Also includes: Hollow shaft (2) passes through motor (1), and one end of hollow shaft (2) is fixed to motor (1); The oil inlet body (3) is provided with a first cavity (3a) and an oil inlet hole (3b) that communicates with the first cavity (3a). The other end of the hollow shaft (2) is located inside the first cavity (3a). An oil-gas separator (4) with one end fixed to the oil inlet body (3) has a first through hole (4a) along the axial direction on the oil-gas separator (4) and an oil drain hole (4b) communicating with the first through hole (4a) on the circumferential surface of the oil-gas separator (4). An oil slinger is located in the first through hole (4a). The oil slinger is fixed to the hollow shaft (2). There is a second oil slinger hole (6) in the circumferential direction of the oil slinger. The hollow shaft (2) and the second oil slinger hole (6) are connected. Connecting seat (5) is fitted onto hollow shaft (2). Motor (1) is fixed to one end of connecting seat (5), and the other end of connecting seat (5) is fixed to the other end of oil-gas separator (4).
2. The electrically driven centrifugal oil-gas separator according to claim 1, characterized in that, It also includes a first bearing (3c), which is installed in the first cavity (3a), and the other end of the hollow shaft (2) is connected to the first bearing (3c).
3. The electrically driven centrifugal oil-gas separator according to claim 1, characterized in that, The oil-gas separator (4) includes a main seat (4c) and an isolation seat (4d). The first through hole (4a) includes a first hole (4a1), a second hole (4a2), and a third hole (4a3). The diameter of the second hole (4a2) is larger than the diameters of the first hole (4a1) and the third hole (4a3). The first hole (4a1) and the second hole (4a2) are opened on the main seat (4c). One end of the isolation seat (4d) is engaged with the second hole (4a2), and the other end of the isolation seat (4d) is engaged with the first cavity (3a). The third hole (4a3) is opened on the isolation seat (4d).
4. The electrically driven centrifugal oil-gas separator according to claim 3, characterized in that, The isolator (4d) has a radial protrusion (4e) on its circumferential surface, and the radial protrusion (4e) is clamped between the main seat (4c) and the oil inlet body (3).
5. The electrically driven centrifugal oil-gas separator according to claim 3, characterized in that, The oil-gas separator (4) also includes a first sealing ring (4f) and a second sealing ring (4g). The circumferential surface of the isolation seat (4d) is provided with a first annular groove, and the axial end face of the isolation seat (4d) facing the oil inlet body (3) is provided with a second annular groove. The first sealing ring (4f) is located between the main seat (4c) and the isolation seat (4d) and cooperates with the first annular groove. The second sealing ring (4g) is located between the isolation seat (4d) and the oil inlet body (3) and cooperates with the second annular groove.
6. The electrically driven centrifugal oil-gas separator according to claim 1, characterized in that, The oil slinger includes a first oil slinger (7) and a second oil slinger (8) located downstream of the first oil slinger (7). Both the first oil slinger (7) and the second oil slinger (8) are provided with a second oil slinger hole (6). The outer diameter of the first oil slinger (7) is larger than the outer diameter of the second oil slinger (8).