Control methods for lubricating oil power system and oil-gas separation system and dual-shaft electric drive lubricating oil power integrated subsystem
By using a dual-axis electric drive lubricating oil power integrated subsystem, the problems of high integration, low power consumption, and wide applicable operating conditions of the lubricating oil system are solved, achieving high reliability and efficient operation of the engine lubricating oil system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUIZHOU YONGHONG AVIATION MACHINERY
- Filing Date
- 2026-05-13
- Publication Date
- 2026-07-31
AI Technical Summary
Existing lubricating oil power systems in the aviation field face challenges in terms of high integration, low power consumption, wide range of applicable operating conditions, and high reliability, especially in the lack of control methods and integrated system design for engine lubricating oil systems.
The system employs a dual-axis electric drive lubricating oil power integrated subsystem, which includes an electric oil supply pump, a return pump, a centrifugal ventilator, and an oil-gas separator driven by a high-voltage DC dual-axis motor. All components are integrated into the same housing and are controlled by a speed change mechanism and a host computer to achieve efficient control of lubricating oil flow and oil-gas separation.
It achieves high integration and low power consumption of the lubricating oil system, is applicable to a wide range of working conditions, and improves the reliability and efficiency of the engine lubricating oil system.
Smart Images
Figure CN122485668A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a control method for a lubricating oil power system and an oil-gas separation system, as well as a dual-axis electric drive lubricating oil power integrated subsystem. Specifically, the integrated subsystem is an integrated component of a supply and return oil power component and an oil-gas separation component driven by a high-voltage DC motor, which is applicable to the lubricating oil system of equipment engines in the fields of aviation, aerospace, shipbuilding, and weaponry. Background Technology
[0002] The lubricating oil power system and oil-gas separation system are mechanical devices used to provide power to the engine lubricating oil system and ensure the consumption of lubricating oil. They are widely used in aviation, aerospace, shipbuilding, automobile and other fields. From the perspective of energy conversion, the electric drive lubricating oil power system converts electrical energy into the kinetic energy and pressure energy of lubricating oil through the supply and return oil pumps, and uses a centrifugal ventilator to separate the oil and gas in the lubricating oil system, ensuring normal consumption of lubricating oil in the system and ensuring the normal operation of the lubricating oil and corresponding systems / equipment of mechanical equipment.
[0003] When the engine and main reducer are running, components such as bearings and gears generate a lot of heat, all of which require lubricating oil for lubrication and cooling. However, the reliability of lubricating oil supply and return power control, lubricating oil consumption control and related equipment has always been a challenge in the domestic aviation field. In particular, the application of lubricating oil power system products with high integration, low power consumption, wide applicable operating conditions and high reliability is a key research focus. In order to solve the problems of high integration, low power consumption, wide applicable operating conditions and high reliability of lubricating oil systems, it is urgent to design a new control method and integrated system. Summary of the Invention
[0004] This invention aims to provide a control method for a lubricating oil power system and an oil-gas separation system, as well as a dual-shaft electric drive lubricating oil power integrated subsystem. Under specified technical indicators such as lubricating oil flow rate, power consumption, and structural dimensions, a lubricating oil power subsystem suitable for engine lubricating oil systems is designed to meet the technical requirements of high integration, low power consumption, wide applicable operating conditions, and high reliability.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dual-shaft electric drive lubricating oil power integrated subsystem includes: A drive motor, wherein the drive motor is a dual-axis motor; An electric centrifugal ventilator is connected to the first output shaft of a drive motor. The oil outlet of the electric centrifugal ventilator is connected to the system oil tank, and the exhaust outlet is connected to the atmospheric environment. An electric oil supply pump and an electric oil return pump are provided. The electric oil supply pump and the electric oil return pump are connected to the second output shaft of the drive motor through a speed change mechanism. The inlet of the electric oil supply pump is connected to the system oil tank, the outlet of the electric oil supply pump is connected to the inlet of one or more lubricating oil chambers in the lubricating oil system, the inlet of the electric oil return pump is connected to the outlet of one or more lubricating oil chambers in the lubricating oil system, and the outlet of the electric oil return pump is connected to the system oil tank. An oil filter is connected between the outlet of an electric oil supply pump and the inlet of one or more oil chambers in a lubrication system to filter the oil flowing from the electric oil supply pump to the multiple oil chambers. A metal powder signal device is installed between the outlet of the electric return oil pump and the system oil tank to detect the metal powder content in the lubricating oil flowing from the electric return oil pump to the system oil tank. An oil-gas separator is connected between the metal dust signal and the system oil tank. It separates the lubricating oil flowing out of the electric return oil pump into oil and gas before it flows into the system oil tank. The drive motor, electric centrifugal ventilator, electric oil supply pump, electric oil return pump, lubricating oil filter, differential pressure signal, oil-gas separator and metal dust signal are integrated in the same housing or on the same surface, and the housing is connected to the system oil tank.
[0006] As one possible solution: a safety valve is installed between the inlet of the lubricating oil filter and the outlet of the electric oil supply pump. The safety valve is a constant pressure valve, and the outlet of the safety valve is connected to the system oil tank.
[0007] As one possible solution: the lubricating oil filter is connected to a differential pressure signal device, which detects the pressure difference between the outlet and inlet of the lubricating oil filter.
[0008] As one possible solution: the exhaust port of the electric centrifugal ventilator is equipped with a high-altitude valve for adjusting the airflow pressure.
[0009] As one option: the electric centrifugal ventilator includes a rotor with a metal sponge structure.
[0010] As one possible solution: both the electric oil supply pump and the electric oil return pump are cycloidal pumps, and after being integrated into one unit, they are connected to the second output shaft of the drive motor through a speed change mechanism.
[0011] As one possible solution: the transmission mechanism is a gear transmission.
[0012] As one possible solution: the drive motor is a high-voltage DC brushless oil-cooled dual-axis motor.
[0013] Control methods for lubricating oil power systems and oil-gas separation systems include: The lubricating oil power system and the oil-gas separation system are driven simultaneously by different outputs of the same high-voltage DC dual-axis motor. A speed change mechanism is set between the lubricating oil power system and the high-voltage DC dual-axis motor, while the oil-gas separation system is directly driven by the high-voltage DC dual-axis motor.
[0014] As one possible solution, the control methods for the lubricating oil power system and the oil-gas separation system also include: The system detects the ambient height of the lubricating oil power system and the oil-gas separation system, and converts the ambient height into an electrical signal through the host computer and outputs it to the high-voltage DC dual-axis motor. This allows the high-voltage DC dual-axis motor to output different power at different ambient heights, thereby controlling the power of the lubricating oil power system and the oil-gas separation system respectively.
[0015] The working principle of the dual-axis electric drive lubricating oil power integrated subsystem of this invention is as follows: During operation, the drive motor simultaneously drives the electric centrifugal ventilator, the electric oil supply pump, and the electric oil return pump to rotate at high speed. Lubricating oil, under the suction of the electric oil supply pump, enters from the system oil tank and is pressurized before flowing into the lubricating oil filter for filtration. (If the outlet pressure of the oil supply pump is too high, the safety valve opens, and part of the lubricating oil flows back to the system oil tank to continue circulating, then flows to the downstream lubricating oil cooling system (heat exchanger) and the lubrication system (engine lubricating oil chamber, bearing lubricating oil chamber, gear lubricating oil chamber, etc.). The electric oil return pump includes multi-stage return, drawing lubricating oil from multiple different chambers in the lubrication system during operation. The lubricating oil, containing a large amount of air, is drawn into the system by an electric return pump. After the metal dust signal detector detects the metal dust content in the lubricating oil, it enters the oil-gas separator for oil-gas separation and returns to the system oil tank. A differential pressure sensor installed at the rear end of the lubricating oil filter monitors the pressure difference across the filter. When the filter becomes clogged, a maintenance alarm signal is output. A large amount of oil and gas accumulating above the system oil tank enters the electric centrifugal ventilator. Inside the ventilator, the lubricating oil flows back to the system oil tank due to the separation by the rotor's metal sponge, while the air flows from the ventilator outlet to a high-altitude valve for pressure regulation before being discharged into the atmosphere. This dual-shaft electrically driven lubricating oil power integrated subsystem allows for the replacement of large components in the original mechanically driven lubricating oil system with a smaller, lighter, and more energy-efficient highly integrated subsystem. This subsystem also features a wide range of applicable operating conditions and high reliability.
[0016] In this invention, the components of the dual-axis electric drive lubricating oil power integrated subsystem, including the electric oil supply pump, electric oil return pump, lubricating oil filter, safety valve, differential pressure signaler, housing, oil-gas separator, metal dust signaler, electric centrifugal ventilator, high-altitude valve, and drive motor, are all integrated into the housing, reducing the volume and weight of the lubricating oil system components.
[0017] In this invention, the dual-axis electric drive lubricating oil power integrated subsystem adopts a high-voltage DC (e.g., 540VDC) dual-axis motor design to simultaneously drive the electric centrifugal ventilator, the electric oil supply pump, and the electric oil return pump (which operate simultaneously, with the electric centrifugal ventilator and the drive motor coaxial, and the electric oil supply pump, the electric oil return pump, and the drive motor being driven by spline gears to meet the different speed requirements on both sides of the lubricating oil power integrated subsystem).
[0018] In this invention, the dual-axis electric drive lubricating oil power integrated subsystem detects the ambient height through a host computer and converts it into an electrical signal, which is then transmitted to the drive motor. This causes the drive motor controller to output motor speed control signals at different heights, controlling the operating speeds of the electric oil supply pump, electric oil return pump, and electric centrifugal ventilator. This ensures that the lubricating oil flow and oil-gas separation efficiency requirements are met while reducing the machine's power consumption.
[0019] Compared with existing technologies, this invention is applied to the internal workings of an engine lubricating oil system. Compared with the lubricating oil power components and centrifugal ventilators currently used in engines, the oil supply and return pumps and centrifugal ventilators of this invention are driven by high-voltage DC motors, which are more efficient and consume less power. Furthermore, the electric oil supply pump, electric oil return pump, and electric centrifugal ventilator adopt the same dual-shaft drive design, which makes the structure more compact, smaller in size, and lighter in weight. This structure is applicable to a wide range of operating conditions and can significantly improve the operational reliability of aero-engine lubricating oil system products. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of the dual-axis electric drive lubricating oil power integrated subsystem in this invention; Figure 2 This is a schematic diagram of the working principle of the dual-axis electric drive lubricating oil power integrated subsystem in this invention. In the figure, the blue arrows indicate the direction of the oil-gas path and the red arrows indicate the direction of the lubricating oil path. In the diagram: 1. Electric oil supply pump, 2. Electric oil return pump, 3. Lubricating oil filter, 4. Safety valve, 5. Differential pressure signal, 6. Housing, 7. Oil-gas separator, 8. Metal dust signal, 9. Electric centrifugal ventilator, 10. High-altitude valve, 11. Drive motor. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.
[0022] like Figure 1 and Figure 2As shown, this invention presents a dual-axis electrically driven lubricating oil power integrated subsystem, which mainly consists of an electric oil supply pump 1, an electric oil return pump 2, a lubricating oil filter 3, a safety valve 4, a differential pressure signal device 5, a housing 6, an oil-gas separator 7, a metal dust signal device 8, an electric centrifugal ventilator 9, a high-altitude valve 10, and a drive motor 11. The dual-axis electrically driven lubricating oil power integrated subsystem is connected to the system oil tank (lubricating oil tank) through the housing 6.
[0023] like Figure 1 The dual-shaft electrically driven lubricating oil power integrated subsystem includes electric oil supply pump 1 and electric return pump 2, both using cycloidal pump structures and integrated into one unit. They are installed on the right side of the lubricating oil power integrated subsystem and driven by the same shaft. Safety valve 4 is a constant pressure valve structure, installed inside the outlet pipeline of electric oil supply pump 1. Lubricating oil filter 3 and differential pressure signal 5 are integrated in the passageway behind safety valve 4. The outlet of lubricating oil filter 3 is connected to the subsystem's rear cooling system via a pipeline. The outer casing 6 is a shared housing for the lubricating oil power integrated subsystem, integrally cast. All other subsystem components are installed inside and on the outer surface of the outer casing 6. Metal shavings signal 8 is installed at the rear end of electric return pump 2 to monitor the metal shavings content and oil-gas separation in electric return pump 2. The separator 7 is installed at the outlet of the metal foam signaler 8 and uses a swirling flow method to separate oil and gas. The electric centrifugal ventilator 9 adopts a metal sponge structure and is installed on the left side of the lubricating oil power integrated subsystem. It is driven by the left output shaft of the drive motor 11. The high-altitude valve 10 is installed at the rear end of the outlet of the centrifugal ventilator 9 and is used to control the internal cavity pressure of the subsystem. The drive motor 11 is a high-pressure brushless oil-cooled motor and is installed in the middle of the lubricating oil power integrated subsystem. It serves as the power source for the centrifugal ventilator 9, the electric oil supply pump 1, and the electric oil return pump 2 in the subsystem. The electric centrifugal ventilator 9 and the drive motor 11 are coaxial. The electric oil supply pump 1, the electric oil return pump 2, and the drive motor 11 are driven by a spline gear to meet the different speed requirements on both sides of the lubricating oil power integrated subsystem.
[0024] like Figure 2 ( Figure 2(The blue arrows indicate the oil-gas path and the red arrows indicate the lubricating oil path.) During operation, the drive motor 11 simultaneously drives the electric centrifugal ventilator 9, the electric oil supply pump 1, and the electric oil return pump 2 to rotate at high speed. The lubricating oil is drawn from the system oil tank into the electric oil supply pump 1 and pressurized before flowing into the lubricating oil filter 3 for filtration. If the outlet pressure of the electric oil supply pump 1 is too high, the safety valve 4 opens, and part of the lubricating oil flows back to the system oil tank to continue circulating. Then it flows to the rear lubricating oil cooling system (such as an air lubricating oil cooler) and the lubrication system. The electric return oil pump 2 has a three-stage return oil system. During operation, it draws lubricating oil from three different cavities in the lubrication system (such as the engine cavity and bearing cavity) into the lubricating oil power integrated subsystem for circulation. The lubricating oil drawn into the subsystem by the electric return oil pump 2 contains a large amount of air. After the metal dust signal device 8 detects the metal dust content in the lubricating oil, it enters the oil-gas separator 7 for oil-gas separation and then returns to the system oil tank. The differential pressure sensor 5 is installed at the rear end of the lubricating oil filter 3 to monitor the pressure difference on both sides of the lubricating oil filter 3. When the lubricating oil filter 3 is blocked, a maintenance alarm signal is output. The large amount of oil and gas accumulated above the system oil tank enters the electric centrifugal ventilator 9. Under the separation of the rotor metal sponge inside the electric centrifugal ventilator 9, the lubricating oil flows back to the system oil tank, and the air flows from the outlet of the electric centrifugal ventilator 9 to the high-altitude valve 10 for pressure regulation and then is discharged into the atmosphere. The dual-axis electric drive lubricating oil power integrated subsystem of drive motor 11 can replace the original mechanically driven lubricating oil system with a highly integrated subsystem that is smaller, lighter, and consumes less energy. This subsystem also has the characteristics of wide applicability and high reliability.
[0025] In the dual-axis electric drive lubricating oil power integrated subsystem designed in this invention, the electric oil supply pump 1, electric oil return pump 2, lubricating oil filter 3, safety valve 4, differential pressure signal 5, housing 6, oil-gas separator 7, metal dust signal 8, electric centrifugal ventilator 9, high-altitude valve 10, drive motor 11 and other components are all integrated into the housing 6, which reduces the volume and weight of the lubricating oil system components.
[0026] This invention, through a dual-axis electric drive lubricating oil power integrated subsystem, can replace the large components of the original mechanically driven lubricating oil system with a highly integrated subsystem that is smaller, lighter, and consumes less energy. This subsystem also features a wide range of applicable working conditions and high reliability.
[0027] Those skilled in the art can make various adjustments to this application based on the actual circumstances. The general principles defined in this application can be implemented in other embodiments without departing from their connotations. Therefore, this application is not limited to the structure shown in the specific embodiments, but is to be accorded the widest scope consistent with the principles and features set forth in the claims of this application.
Claims
1. A dual-axle electrically driven oil power integrated subsystem, characterized in that, include: Drive motor (11), wherein the drive motor (11) is a dual-axis motor; Electric centrifugal ventilator (9), the electric centrifugal ventilator (9) is connected to the first output shaft of the drive motor (11), the oil outlet of the electric centrifugal ventilator (9) is connected to the system oil tank, and the exhaust outlet is connected to the atmospheric environment; Electric oil supply pump (1) and electric oil return pump (2), wherein the electric oil supply pump (1) and electric oil return pump (2) are connected to the second output shaft of drive motor (11) through a speed change mechanism. The inlet of electric oil supply pump (1) is connected to the system oil tank, the outlet of electric oil supply pump (1) is connected to the inlet of one or more lubricating oil chambers in the lubricating oil system, the inlet of electric oil return pump (2) is connected to the outlet of one or more lubricating oil chambers in the lubricating oil system, and the outlet of electric oil return pump (2) is connected to the system oil tank. The lubricating oil filter (3) is connected between the outlet of the electric oil supply pump (1) and the inlet of one or more lubricating oil chambers in the lubricating oil system, and is used to filter the lubricating oil flowing from the electric oil supply pump (1) to the multiple lubricating oil chambers. Metal foam signal (8) is installed between the outlet of the electric return oil pump (2) and the system oil tank to detect the metal foam content in the lubricating oil flowing from the electric return oil pump (2) to the system oil tank. Oil-gas separator (7), which is connected between the metal dust signal (8) and the system oil tank, separates the lubricating oil flowing out of the electric return oil pump (2) into oil and gas before it flows into the system oil tank. The drive motor (11), electric centrifugal ventilator (9), electric oil supply pump (1), electric oil return pump (2), lubricating oil filter (3), differential pressure signal (5), oil-gas separator (7) and metal dust signal (8) are integrated in the same housing (6) or on the surface, and the housing (6) is connected to the system oil tank.
2. The dual axle electrically driven oil power integrated subsystem of claim 1, wherein: A safety valve (4) is provided between the inlet of the lubricating oil filter (3) and the outlet of the electric oil supply pump (1). The safety valve (4) is a constant pressure valve, and the outlet of the safety valve (4) is connected to the system oil tank.
3. The dual axle electric drive oil power integrated subsystem of claim 1, wherein: The lubricating oil filter (3) is connected to the differential pressure signal device (5), and the differential pressure signal device (5) detects the pressure difference between the outlet and inlet of the lubricating oil filter (3).
4. The dual-axis electric drive lubricating oil power integrated subsystem according to claim 1, characterized in that: The exhaust port of the electric centrifugal ventilator (9) is equipped with a high-altitude valve (10) for adjusting the airflow pressure.
5. The dual-axis electric drive lubricating oil power integrated subsystem according to claim 1, characterized in that: The electric centrifugal ventilator (9) includes a rotor with a metal sponge structure.
6. The dual-axis electric drive lubricating oil power integrated subsystem according to claim 1, characterized in that: The electric oil supply pump (1) and the electric oil return pump (2) are both cycloidal pumps, and after being integrated into one unit, they are connected to the second output shaft of the drive motor (11) through a speed change mechanism.
7. The dual-axis electric drive lubricating oil power integrated subsystem according to claim 1, characterized in that: The transmission mechanism is a gear transmission.
8. The dual-axis electric drive lubricating oil power integrated subsystem according to claim 1, characterized in that: The drive motor (11) is a high-voltage DC brushless oil-cooled dual-axis motor.
9. A control method for a lubricating oil power system and an oil-gas separation system, characterized in that, include: The lubricating oil power system and the oil-gas separation system are driven simultaneously by different outputs of the same high-voltage DC dual-axis motor. A speed change mechanism is set between the lubricating oil power system and the high-voltage DC dual-axis motor, while the oil-gas separation system is directly driven by the high-voltage DC dual-axis motor.
10. The control method for the lubricating oil power system and the oil-gas separation system according to claim 9, characterized in that, Also includes: The system detects the ambient height of the lubricating oil power system and the oil-gas separation system, and converts the ambient height into an electrical signal through the host computer and outputs it to the high-voltage DC dual-axis motor. This allows the high-voltage DC dual-axis motor to output different power at different ambient heights, thereby controlling the power of the lubricating oil power system and the oil-gas separation system respectively.