Gas-phase coking measuring equipment for aviation lubricating oil

Abstract

The utility model discloses gas-phase coking measuring equipment for aviation lubricating oil, and belongs to the field of gas-phase coking tendency measurement. A gas-phase coking measuring device for aviation lubricating oil comprises a working box, a containing cavity and a working cavity are formed in a cavity of the working box through a partition plate, a heating table is arranged in the working cavity, a supporting plate is detachably arranged on the top face of the heating table, an experiment cup is arranged on the supporting plate, the bottom face of the experiment cup is attached to the supporting plate, and a rotating shaft is rotationally connected into the containing cavity. A storage roll is fixedly connected to the rotating shaft, and a connecting rope is connected to the storage roll in a winding manner; according to the utility model, internal lubricating oil in the working process of an aero-engine can be simulated through high-temperature lubricating oil, the oxidation reaction of the oil product in contact with metal is observed, then the coke generation amount on the metal surface is detected, and meanwhile, gas can be introduced into an analytical instrument through the gas outlet pipe for subsequent further coking analysis; therefore, evaluation personnel can be assisted in evaluating the coking risk of the aviation lubricating oil.

Description

Technical Field

[0001] This utility model relates to the field of gas phase coking tendency measurement technology, and in particular to a device for measuring gas phase coking of aviation lubricating oil. Background Technology

[0002] Aviation lubricants are used in aerospace equipment. Among them, aviation turbine engine lubricants are a type of aviation lubricant. Their lubrication and cooling of internal components of aviation engines are indispensable for the normal operation of aviation engines.

[0003] In the existing technology, during the daily use of turbo lubricating oil, the high-temperature operating environment of the engine makes it prone to oxidation and cracking. Oxidized or cracked turbo lubricating oil will produce by-products that seriously affect engine performance, such as carbon deposits and sludge. These by-products can be called vapor coking, which is a carbon deposit formed by turbo lubricating oil in the high-temperature ventilation pipe area of ​​the engine where there is no oil lubrication. These cracking by-products can hinder the normal operation of bearings, gears, seals, oil return pumps and intake systems in the engine. In severe cases, they can lead to catastrophic engine failure and affect the operational safety of the aircraft.

[0004] Therefore, there is an urgent need to design a device for measuring the coking of aviation lubricating oil in the vapor phase, to assist testers in assessing the coking risk of aviation lubricating oil. Utility Model Content

[0005] The purpose of this invention is to solve the problem of evaluating and measuring vapor phase coking of aviation lubricating oil in the prior art, and to propose a device for measuring vapor phase coking of aviation lubricating oil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An apparatus for measuring vapor phase coking of aviation lubricating oil includes a working chamber. The working chamber has a placement chamber and a working chamber separated by a partition plate. A heating platform is installed in the working chamber. A tray is detachably mounted on the top surface of the heating platform, and a test cup is mounted on the tray. The bottom surface of the test cup is in contact with the tray. A rotating shaft is rotatably connected to the placement chamber. A storage roll is fixedly connected to the rotating shaft, and a connecting rope is wound around the storage roll. The connecting rope extends into the working chamber. A drive unit is provided on the working chamber for controlling the rotation of the rotating shaft to adjust the winding and unwinding of the connecting rope.

[0008] To facilitate tightening or loosening of the connecting rope, preferably, the drive unit includes a motor fixedly connected to the placement cavity, the rotating shaft fixedly connected to the output end of the motor, a through hole provided on the partition plate, and the storage roll disposed above the through hole.

[0009] To facilitate the collection of gas generated inside the experimental cup, preferably, a vacuum pump is also included, which is fixedly connected inside the placement chamber. The input end of the vacuum pump is provided with an air inlet, which is located inside the working chamber. The input end of the vacuum pump extends to the outside of the working chamber through an air outlet pipe.

[0010] To improve the heat conduction of the experimental cup, preferably, a limiting frame is fixedly connected to the heating platform, and the limiting frame abuts against the outer wall of the experimental cup.

[0011] To facilitate temperature detection of the experimental cup, a temperature sensor is fixedly connected to the limiting frame, with the detection end of the temperature sensor facing the outer wall of the experimental cup.

[0012] To facilitate sealing or opening the work box, preferably, the work box is hinged to a door, and the door is provided with a transparent panel.

[0013] Compared with the prior art, this utility model provides a device for measuring vapor phase coking of aviation lubricating oil, which has the following beneficial effects:

[0014] 1. This equipment for measuring vapor phase coking of aviation lubricating oil uses metal coils or bearing materials to simulate engine components, which are placed in an experimental cup filled with lubricating oil. The experimental cup is then heated. At this time, the internal lubricating oil in the process of aviation engine operation can be simulated by the high temperature of the lubricating oil. The oxidation reaction of the oil in contact with the metal is then observed, and the amount of coke generated on the metal surface is then detected.

[0015] 2. This equipment for measuring vapor phase coking of aviation lubricating oil can also monitor the color change or bubble generation of lubricating oil in real time through the experimental cup, thereby assisting the testers in reflecting the lubricating oil's ability to resist metal catalytic coking.

[0016] 3. This equipment for measuring gas phase coking in aviation lubricating oil can adsorb the gas in the working chamber into the vacuum pump by starting the vacuum pump, and then the vacuum pump delivers the gas to the outside of the working chamber through the gas outlet pipe. The gas outlet pipe can guide the gas into the analytical instrument for further coking analysis, so as to help the testers assess the coking risk of aviation lubricating oil.

[0017] The parts not covered in this device are the same as or can be implemented using existing technologies. This utility model can use metal coils or bearing materials to simulate engine components, place them in an experimental cup filled with lubricating oil, and then heat the experimental cup. At this time, the high-temperature lubricating oil can simulate the internal lubricating oil in the operation of an aircraft engine, and then observe the oxidation reaction of the oil in contact with the metal. Subsequently, the amount of coke generated on the metal surface is detected. At the same time, the gas can be introduced into the analytical instrument through the gas outlet pipe for further coking analysis, so as to assist the testers in assessing the coking risk of aviation lubricating oil. Attached Figure Description

[0018] Figure 1 This is a first-view structural schematic diagram of an aviation lubricating oil vapor phase coking measuring device proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of a device for measuring vapor phase coking of aviation lubricating oil proposed in this utility model from a second perspective.

[0020] Figure 3 This is a schematic diagram of the structure of a heating platform for measuring vapor phase coking of aviation lubricating oil proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the planar structure of a device for measuring the gas phase coking of aviation lubricating oil proposed in this utility model.

[0022] In the diagram: 1. Working box; 2. Divider; 3. Heating platform; 4. Experimental cup; 5. Limiting frame; 6. Temperature sensor; 7. Motor; 8. Rotating shaft; 9. Storage roll; 10. Connecting rope; 11. Air inlet hopper; 12. Vacuum pump; 13. Air outlet pipe; 14. Box door; 15. Transparent panel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Example:

[0026] Reference Figures 1-4 An apparatus for determining vapor phase coking of aviation lubricating oil includes a working chamber 1. The working chamber 1 has a placement chamber and a working chamber separated by a partition plate 2. A heating stage 3 is installed in the working chamber. A tray is detachably mounted on the top surface of the heating stage 3. The heating stage 3 can be a constant-temperature heating stage 3 and can heat the tray. An experimental cup 4 is placed on the tray, with its bottom surface in contact with the tray. Heat is transferred to the experimental cup 4 through the tray, providing uniform heating. The experimental cup 4 is made of high-temperature heat-resistant glass, a special type of glass with excellent thermal stability and mechanical strength. Furthermore, the temperature resistance of the experimental cup 4 is greater than 500℃, allowing aviation lubricating oil to be filled into it. The heating stage 3 is then activated, heating the lubricating oil to between 350℃ and 450℃. Subsequently, a metal coil or bearing material can be used to simulate... The engine components are placed in the experimental cup 4. At this time, the internal lubricating oil in the operation process of the aircraft engine can be simulated by high-temperature lubricating oil. The oxidation reaction of the oil in contact with the metal can be observed, and then the amount of coke generated on the metal surface can be detected. In addition, the experimental cup 4 can also monitor the color change or bubble generation of the lubricating oil in real time, thereby helping the testers to reflect the lubricating oil's ability to resist metal catalytic coking. In order to facilitate the handling of metal coils or bearing materials, a rotating shaft 8 is rotatably connected in the placement chamber. A storage roll 9 is fixedly connected to the rotating shaft 8, and a connecting rope 10 is wound around the storage roll 9. The connecting rope 10 extends into the working chamber. A drive unit is provided on the working box 1 to control the rotation of the rotating shaft 8 to adjust the winding and unwinding of the connecting rope 10. The metal coils or bearing materials can be connected to the connecting rope 10, and the driving unit can move the connecting rope 10 up and down.

[0027] In the above scheme, aviation lubricating oil is filled into the experimental cup 4, and then the switch of the heating platform 3 is turned on to heat the lubricating oil to between 350℃ and 450℃. Then, a metal coil or bearing material can be used to simulate engine components and placed in the experimental cup 4. At this time, the internal lubricating oil in the aircraft engine operation process can be simulated by the high temperature of the lubricating oil. The oxidation reaction of the oil in contact with the metal can be observed, and then the amount of coke generated on the metal surface can be detected. In addition, the experimental cup 4 can also monitor the color change or bubble generation of the lubricating oil in real time, thereby helping the testers to reflect the lubricating oil's ability to resist metal catalytic coking.

[0028] To facilitate the easy movement of the components of the simulated engine, the aforementioned drive unit includes a motor 7 fixedly connected to the placement cavity, a rotating shaft 8 fixedly connected to the output end of the motor 7, a through hole on the partition plate 2, and a storage roll 9 positioned above the through hole. The motor 7 can drive the rotating shaft 8 to rotate, causing the rotating shaft 8 to drive the storage roll 9 to rotate synchronously, thereby causing the connecting rope 10 to wind around the storage roll 9. During the winding process, the position of the connecting rope 10 remains unchanged, always above the through hole.

[0029] In addition, a vacuum pump 12 is fixedly connected in the placement chamber. The input end of the vacuum pump 12 is provided with an air inlet hopper 11, which is located in the working chamber. The input end of the vacuum pump 12 extends to the outside of the working chamber 1 through the air outlet pipe 13. When the vacuum pump 12 is started, the air inlet hopper 11 can be used to adsorb the gas in the working chamber into the vacuum pump 12, and then the vacuum pump 12 can be transported to the outside of the working chamber 1 through the air outlet pipe 13. The air outlet pipe 13 can introduce the gas into the analytical instrument for further coking analysis.

[0030] To facilitate the positioning of the experimental cup 4, a limiting frame 5 is fixedly connected to the heating platform 3. The limiting frame 5 abuts against the outer wall of the experimental cup 4. A temperature sensor 6 is fixedly connected to the limiting frame 5. The detection end of the temperature sensor 6 faces the outer wall of the experimental cup 4 and is used to monitor the temperature of the experimental cup 4 in real time. The temperature sensor 6 can be an infrared high-temperature temperature sensor 6.

[0031] The work box 1 is hinged to a door 14, and a transparent plate 15 is installed on the door 14. The transparent plate 15 allows observation of the state of the experimental cup 4, while the door 14 can seal the work box 1 to protect the experimental personnel.

[0032] It should be explained that heating platform 3 can also use a full-fiber continuous heating furnace to ensure heating effect. The metal coils or bearing materials used to simulate engine components can be 20CrMnTi carburized and quenched steel, which is suitable for simulating high-temperature friction interfaces of planetary gears, bearings and other components. Inconel 718 nickel-based alloy can also be used, which is used for metal surfaces in the high-temperature zone of aerospace simulated turbine engines.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for measuring vapor phase coking of aviation lubricating oil, comprising a working chamber (1), wherein the working chamber (1) has a placement chamber and a working chamber provided within its cavity by a partition plate (2), characterized in that, A heating platform (3) is provided inside the working chamber. The heating platform (3) is detachably provided with a tray on its top surface. An experimental cup (4) is provided on the tray. The bottom surface of the experimental cup (4) is in contact with the tray. A rotating shaft (8) is rotatably connected inside the placement cavity. A storage roll (9) is fixedly connected to the rotating shaft (8). A connecting rope (10) is wound around the storage roll (9). The connecting rope (10) extends into the working cavity. A drive unit is provided on the working box (1) to control the rotation of the rotating shaft (8) to adjust the winding and unwinding of the connecting rope (10).

2. The apparatus for determining vapor phase coking of aviation lubricating oil according to claim 1, characterized in that, The drive unit includes a motor (7) fixedly connected in the placement cavity, a rotating shaft (8) fixedly connected to the output end of the motor (7), a through hole on the partition plate (2), and a storage roll (9) disposed above the through hole.

3. The apparatus for determining vapor phase coking of aviation lubricating oil according to claim 1, characterized in that, It also includes a vacuum pump (12) fixedly connected in the placement cavity. The input end of the vacuum pump (12) is provided with an air inlet (11), which is located in the working cavity. The input end of the vacuum pump (12) extends to the outside of the working box (1) through an air outlet pipe (13).

4. The apparatus for determining vapor phase coking of aviation lubricating oil according to claim 1, characterized in that, A limiting frame (5) is fixedly connected to the heating platform (3), and the limiting frame (5) abuts against the outer wall of the experimental cup (4).

5. The apparatus for determining vapor phase coking of aviation lubricating oil according to claim 4, characterized in that, A temperature sensor (6) is fixedly connected to the limiting frame (5), and the detection end of the temperature sensor (6) faces the outer wall of the experimental cup (4).

6. The apparatus for determining vapor phase coking of aviation lubricating oil according to claim 1, characterized in that, The work box (1) is hinged to a door (14), and a transparent panel (15) is provided on the door (14).

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