A device and method for measuring the amount of oil leakage in the inner cavity of a rotating part

Abstract

The application discloses a kind of rotary parts inner cavity oil leakage measuring device and method, belong to aviation engine clutch detection field, this oil leakage measuring device includes the oil supply mechanism, transmission oil conveying device and metering assembly set in device ontology;Oil supply mechanism is used to deliver lubricating oil to the part to be measured, transmission oil conveying device can make the part to be measured keep in preset rotating state, and the lubricating oil of oil supply mechanism is delivered to the part to be measured, metering assembly measures the part to be measured kept in rotating state;The structure design of above-mentioned, the simulation of actual working condition of rotary part in aviation engine is realized, and the accuracy of measurement is improved;The structure and principle of the measuring device are simple, easy to implement and operate, and have good popularization and application value.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine clutch testing, specifically relating to a device and method for measuring oil leakage in the internal cavity of rotating parts. Background Technology

[0002] As a rotating component, the clutch cover is an important part of the aero-engine clutch. In order to ensure its stable working performance, it is necessary to test its various functions, including testing for oil leakage.

[0003] Currently, existing oil leakage measurement devices for testing the oil leakage of rotating parts have the following problems: 1) The transmission device of the equipment is designed for fixed speed, and the rotation speed of the part under test cannot be adjusted, so the actual rotation speed of the part under test cannot be displayed; 2) The process instructions for the clutch cover test stipulate that the leakage check should measure the amount of oil thrown out from the three valve holes of the clutch cover, but due to design defects, the existing measurement devices collect oil leakage from other places, resulting in an overestimation of the measured value; 3) The components of the original equipment are severely aged, and oil seeps into many gaps. The oil leakage measurement device only has upper and lower scale lines, so the oil leakage can only be estimated and cannot be accurately displayed.

[0004] This shows that existing oil leakage measurement devices cannot simulate the actual operating conditions of rotating parts in an aero-engine, resulting in inaccurate measurement results. Summary of the Invention

[0005] To overcome the above-mentioned technical defects, the present invention provides a device and method for measuring the amount of oil leakage in the internal cavity of rotating parts, which can solve the technical problem that existing oil leakage measuring devices cannot simulate the actual working conditions of rotating parts in aero engines, resulting in inaccurate measurement results.

[0006] To achieve the above objectives, the present invention employs the following technical content:

[0007] A device for measuring oil leakage in the inner cavity of a rotating part, comprising a device body;

[0008] The device body is provided with an oil supply mechanism, a transmission oil supply device connected to the oil supply mechanism and used to rotate and supply oil to the part under test, and a metering component for measuring the amount of oil leakage in the inner cavity of the part under test; the metering component measures the part under test while it is in a rotating state.

[0009] Furthermore, the oil supply mechanism includes a lower oil tank located at the bottom of the device body and an upper oil tank located at the top of the device body; the lower oil tank, the upper oil tank, and the transmission oil delivery device are connected in sequence.

[0010] Furthermore, the oil supply mechanism also includes a pump unit and a filter connected between the lower oil tank and the upper oil tank.

[0011] Furthermore, the transmission oil delivery device includes a variable frequency motor, a synchronous belt, and a hollow shaft; the output end of the variable frequency motor is connected to the synchronous belt, the synchronous belt is connected to the input end of the hollow shaft, the output end of the hollow shaft is connected to the part to be tested; an encoder is also connected to the hollow shaft.

[0012] Furthermore, the metering component includes a first metering device, which is connected to the inner cavity of the part to be measured.

[0013] Furthermore, the metering component also includes a second metering device, which is connected between the oil supply mechanism and the transmission oil conveying device.

[0014] Furthermore, it also includes a test chamber disposed within the device body, the test chamber being divided into a first test chamber and a second test chamber, the part to be tested being fixed in the first test chamber; the outlets of the first test chamber and the second test chamber are connected in parallel to the metering component.

[0015] Furthermore, it also includes an electrical cabinet, which is electrically connected to the oil supply mechanism, the transmission oil conveying device, and the metering components.

[0016] A method for measuring the oil leakage of the inner cavity of a rotating part based on the above-mentioned measuring device includes: supplying lubricating oil by an oil supply mechanism, starting a transmission oil delivery device to drive the part to be tested to rotate, and when the part to be tested stabilizes at a preset speed, supplying lubricating oil to the inner cavity of the part to be tested through the transmission oil delivery device, and measuring the amount of oil leakage in the inner cavity of the part to be tested under the rotating state using a metering component.

[0017] Furthermore, the specific steps include:

[0018] First, turn on the power and start the pump set. Fill the upper oil tank with oil from the lower oil tank. At the same time, start the electric heating device of the upper oil tank to heat the lubricating oil and maintain it at the specified temperature. While heating, install the part to be tested onto the drive shaft of the test chamber and close the test chamber door.

[0019] The second step is to inject hot oil into the second metering device after the lubricating oil is heated, start the transmission oil delivery device, and stabilize the part under test to the preset speed; then inject the preset value of hot oil into the part under test, and after the working state is stable, check the amount of oil leakage in the first metering device within the preset time period.

[0020] The third step is to drain the oil from the first metering device. After draining, the same amount of oil leaked from the first metering device in step two is injected into the part to be tested from the second metering device to keep the amount of lubricating oil in the part to be tested at a preset value. The amount of oil leaked in the first metering device is checked again within a preset time period, and this amount of oil leak is taken as the final test amount of oil leak.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention provides a device for measuring the oil leakage of the internal cavity of rotating parts. The device includes an oil supply mechanism, a transmission oil delivery device, and a metering component housed within the device body. The oil supply mechanism delivers lubricating oil to the part under test, the transmission oil delivery device keeps the part under test in a preset rotating state, and delivers the lubricating oil from the oil supply mechanism to the part under test. The metering component measures the part under test while it is in a rotating state. This structural design simulates the actual working conditions of rotating parts in aero-engines, improving measurement accuracy. The device has a simple structure and principle, is easy to implement and maintain, and has good application value.

[0023] Preferably, in this invention, the fuel supply mechanism adopts a lower fuel tank located at the bottom of the device body and an upper fuel tank located at the top of the device body. The structural design of the lower and upper fuel tanks further simulates the actual working conditions of the engine, improves the fidelity of the actual working conditions, and thus improves the accuracy of the measurement.

[0024] Preferably, in this invention, the oil supply mechanism further includes a pump set and a filter between the lower oil tank and the upper oil tank. The pump set can provide power for drawing oil from the lower oil tank to the upper oil tank, and the filter can effectively filter impurities in the oil pipe, preventing impurities from entering the metering device and interfering with the actual measurement value, thus ensuring the accuracy of the measurement.

[0025] In addition, a heating and temperature control device is installed in the upper oil tank, which can heat the lubricating oil drawn from the lower oil tank to output hot oil at a stable temperature, simulating the actual working conditions of the engine.

[0026] Preferably, in this invention, the transmission and oil delivery device employs a variable frequency motor, a synchronous belt, and a hollow shaft connected in sequence. The variable frequency motor can achieve four fixed speed settings and stepless speed regulation, thus enabling the measurement of oil leakage at each preset speed of the part under test, collecting multiple sets of data for accurate performance analysis of the part under test. The hollow shaft design ensures that it serves as both a power transmission component and a lubricating component, guaranteeing lubrication output during continuous rotation. An encoder is also included, which can collect the rotational speed of the hollow shaft in real time, ensuring the measurement of the part under test at the preset speed and thus guaranteeing the accuracy of the measurement data.

[0027] Preferably, in this invention, the metering component employs a first metering device that communicates with the inner cavity of the part to be measured, and the first metering device can accurately measure the amount of oil leakage from the inner cavity of the part to be measured.

[0028] More preferably, the metering component also includes a second metering device connected between the oil supply mechanism and the transmission oil conveying device. This design allows for two rounds of measurement of the part under test. In the first round of measurement, the first metering device is used to obtain the first measurement data. The metering by the second metering device ensures that the amount of oil replenished in the second round of measurement is equal to that in the first round. Through two rounds of measurement, the part under test is kept in a stable state, preventing the accuracy of the measurement results from being affected by oil leakage into other gaps or cavities in the first round of measurement. The setting of two metering devices further ensures the accuracy of the measurement.

[0029] Preferably, in this invention, the device body is provided with a test chamber, specifically a first test chamber for fixing the part to be tested and a second test chamber for collecting oil leaked from other places; the outlets of both chambers are connected to the first metering device; thus, it makes up for the defect of existing devices that can only count oil leaked from parts, resulting in an overestimation of the measured value.

[0030] Preferably, the present invention also includes an electrical cabinet with automatic control function, which is electrically connected to the oil supply mechanism, the transmission oil conveying device, and the metering component. The electrical cabinet is equipped with buttons, knobs, indicator lights, display instruments, etc., which can control the switches on each pipeline, control the gear and speed of the variable frequency motor, acquire the data collected by the encoder, and read the measurement results of the metering device, etc. It can realize the equipment control function and data display. The design of the electrical cabinet realizes the functions of automated control, information collection and data analysis and display, enabling the measuring device to automatically measure the amount of oil leakage in the inner cavity of rotating parts.

[0031] This invention also provides a method for measuring the oil leakage of the internal cavity of rotating parts. Based on the aforementioned oil leakage measuring device for rotating parts, the measurement method can realistically simulate the actual working conditions of rotating parts in aero-engines, thereby accurately and effectively measuring the oil leakage of the internal cavity of rotating parts. This method is easy to operate and implement, ensures the accuracy of the measurement, and meets the testing requirements for rotating parts of aero-engines.

[0032] Preferably, this method also employs a two-round measurement approach for the part under test. In the first round of measurement, the first measuring device is used to obtain the first measurement data. The measurement by the second measuring device ensures the replenishment of lubricating oil in the second round, making the total oil volume in the second round equal to that in the first round. Through two rounds of measurement, the part under test is kept in a stable state, preventing the accuracy of the measurement results from being affected by oil leakage into other gaps or cavities during the first round of measurement. The setting of two measuring devices further ensures the accuracy of the measurement. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a device for measuring the amount of oil leakage in the inner cavity of a rotating part, provided in an embodiment of the present invention. (a) is a front view; (b) is a side view.

[0034] Figure 2 This is a schematic diagram illustrating the working principle of a device for measuring oil leakage in the inner cavity of a rotating part, provided in an embodiment of the present invention.

[0035] Figure label:

[0036] 1. Device body; 2. Lower oil tank; 3. Oil outlet valve; 4. Oil inlet valve; 5. Second metering device; 6. First oil drain switch; 7. Second oil drain switch; 8. First metering device; 9. Pump set; 10. Electrical cabinet; 11. Upper oil tank; 12. Transmission and oil delivery device; 13. First chamber of the test chamber; 14. Second chamber of the test chamber; 15. Part to be tested; 16. Third oil drain switch; 17. Filter;

[0037] 12-1. Encoder; 12-2. Variable frequency motor; 12-3. Synchronous belt; 12-4. Hollow shaft. Detailed Implementation

[0038] To make the technical problems solved by the present invention, the technical solutions, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] Example

[0047] As mentioned in the background technology, the oil leakage measurement device used for testing the oil leakage of rotating parts has the following problems: 1) The equipment transmission device is designed for fixed speed, and the rotation speed of the part under test cannot be adjusted, making it impossible to display the actual rotation speed of the part under test. 2) The process specification for the clutch cover test stipulates that the leakage check should measure the amount of oil ejected from the three valve holes of the clutch cover, but due to design defects, the existing measurement device includes oil leaking from other places in the collected measurement, resulting in an inflated measurement value. 3) The original equipment has severely aged components, with oil seeping into many gaps. The oil leakage measurement device only has upper and lower scale lines, allowing only estimation of the oil leakage amount and failing to display it accurately.

[0048] To achieve the above objectives, this embodiment provides a device and method for measuring the oil leakage of the inner cavity of rotating parts, so as to accurately measure the oil leakage at different rotational speeds.

[0049] The specific structure of this embodiment will be described in detail below with reference to the accompanying drawings:

[0050] like Figure 1 shown, specific Figure 1 As shown in (a) and (b) in this embodiment, the rotating part adopts a clutch sleeve. This embodiment provides a device for measuring the oil leakage of the inner cavity of a rotating part, including:

[0051] The device body includes an oil supply mechanism, a transmission oil delivery device, and a metering component. The oil supply mechanism delivers lubricating oil to the part under test, the transmission oil delivery device keeps the part under test in a preset rotational state and delivers the lubricating oil from the oil supply mechanism to the part under test, and the metering component measures the part under test while it is in a rotating state. This structural design simulates the actual operating conditions of rotating parts in an aero-engine, improving measurement accuracy. The specific structure is as follows:

[0052] The device consists of: main body 1, lower oil tank 2, upper oil tank 9, first metering device 8, second metering device 5, transmission and oil delivery device 12, pump set 9, test chamber and electrical cabinet 10.

[0053] Here, the structural design of the lower and upper fuel tanks further simulates the actual working conditions of the engine, improving the fidelity of the actual working conditions and thus enhancing the accuracy of the measurements.

[0054] The pump unit provides power for pumping oil from the lower tank to the upper tank, and the filter effectively filters impurities in the oil pipe, preventing impurities from entering the metering device and interfering with the actual measurement value, thus ensuring the accuracy of the measurement.

[0055] Combination Figure 2As shown, in this embodiment, the device body 1 is a frame structure welded from angle steel, which serves as the basis for the installation of other mechanisms.

[0056] The lower oil tank 2 is made of stainless steel plate and is equipped with a level gauge, level switch and air filter, and can realize the level alarm function.

[0057] The upper oil tank 11 is made of stainless steel plate and is equipped with a level gauge, level switch, air filter and electric heater, which can realize level alarm and heating temperature control functions.

[0058] The heating and temperature control function can heat the lubricating oil drawn from the lower oil tank, so that it outputs hot oil in a stable state, simulating the actual working conditions of the engine.

[0059] The second metering device 5 is a plate-welded cylindrical structure, on which an oil outlet valve 3 and an oil inlet valve 4 are installed.

[0060] The first metering device 8 has a cylindrical structure, on which a first oil drain switch 6 and a second oil drain switch 7 are mounted.

[0061] The transmission oil delivery device 12 consists of a variable frequency motor 12-2, a synchronous belt 12-3, an encoder 12-1, a support base, bearings, a hollow shaft 12-4 (i.e., a hollow oil delivery pipe), and other transmission components. The encoder 12-1 is used to measure the actual speed of the part to be tested 15. The variable frequency motor 12-2 and the transmission components can achieve four fixed speed ranges and stepless speed regulation.

[0062] The variable frequency motor can achieve four fixed speed settings and stepless speed regulation. This allows for the measurement of oil leakage at each preset speed of the part under test, collecting multiple sets of data for accurate performance analysis. The hollow shaft design ensures that it serves as both a power transmission component and a lubricating component, guaranteeing lubrication output during continuous rotation. An encoder is also included, which can collect the rotational speed of the hollow shaft in real time, ensuring the accuracy of the measurement data by measuring the part under test at the preset speed.

[0063] Pump unit 9 is used to inject oil from lower oil tank 2 into upper oil tank 11.

[0064] The test chamber has a sleeve-shaped structure, which is divided into two chambers, front and rear, by a partition. The first chamber 13 of the test chamber collects the oil leaked from the part under test 15, and the second chamber 14 of the test chamber collects the oil leaked from other places.

[0065] In this embodiment, the outlets of the two compartments are both connected to the first metering device; this overcomes the deficiency of existing devices that can only count oil leaking from parts, resulting in overestimation of the measured value.

[0066] The electrical cabinet 10 is located next to the metering device and is equipped with buttons, knobs, indicator lights, display instruments, etc., which can realize the control function of the equipment and display data.

[0067] It should be noted that in this embodiment, the metering component also includes a second metering device 5 connected between the oil supply mechanism and the transmission oil conveying device. This design allows for two rounds of measurement of the part under test. In the first round of measurement, the first metering device 8 is used to obtain the first measurement data. The metering by the second metering device 5 ensures the replenishment of oil in the second round of measurement, making the total oil volume in the second round of measurement equal to that in the first round. Through two rounds of measurement, the part under test can be kept in a stable state, preventing the accuracy of the measurement results from being affected by oil leakage into other gaps or cavities in the first round of measurement. The setting of two metering devices further ensures the accuracy of the measurement.

[0068] Combination Figure 1 and Figure 2 This embodiment provides a device for measuring the oil leakage of the inner cavity of rotating parts, with the specific connection as follows:

[0069] The main body 1 is a frame structure welded from angle steel, serving as the foundation for the installation of other mechanisms. The lower oil tank 2, mounted on the lower base plate of the main body 1, is a welded stainless steel structure, equipped with a level gauge and level switch, an air filter, and a drain switch at the bottom. The upper oil tank 11, mounted on the upper support plate of the main body 1, is a welded stainless steel structure, equipped with a level gauge and level switch, an air filter, an electric heater, and a filter. The second metering device 5 is a welded cylindrical structure, equipped with an oil outlet valve 3 and an oil inlet valve 4. The oil inlet valve 4 is connected to the upper oil tank 11, and the oil outlet valve 3 is connected to the transmission oil conveying device 12. The first metering device 8 is a cylindrical structure, equipped with a first drain switch 6 and a second drain switch 7. The second drain switch 7 is connected to the second chamber 14 of the test chamber, and the first drain switch 6 is connected to the first chamber 13 of the test chamber. The transmission oil conveying device... Unit 12 consists of a variable frequency motor 12-2, a synchronous belt 12-3, an encoder 12-1, a support base, bearings, a hollow shaft 12-4 (i.e., a hollow oil supply pipe), and other transmission components. It is installed on the support plate in the main body 1, with one end connected to the oil outlet valve 3 of the second metering device 5 and the other end connected to the test chamber. Pump unit 9 is installed on the bottom plate of the main body 1, with one end connected to the lower oil tank 2 and the other end connected to the filter 17 of the upper oil tank 11. The test chamber has a sleeve-shaped structure, divided into front and rear chambers by a partition. The first chamber 13 of the test chamber is connected to the first oil drain switch 6 of the first metering device 8, and the second chamber 14 of the test chamber is connected to the second oil drain switch 7 of the first metering device 8. The electrical cabinet 10 has a cabinet-type structure and is placed next to this metering device. The front panel is equipped with buttons, knobs, indicator lights, display instruments, etc., which can realize the control function of the equipment and display data.

[0070] This embodiment also provides a method for measuring oil leakage from the internal cavity of rotating parts, the specific steps of which are as follows:

[0071] 1) Start the power supply and start the pump group 9 to inject oil from the lower oil tank 2 to the upper oil tank 11. At the same time, start the electric heating device of the upper oil tank 11 to heat the lubricating oil and maintain it at a constant temperature to the specified temperature.

[0072] 2) While heating, install the part to be tested 15 (clutch cover) onto the hollow shaft 12-4 (drive shaft) of the test chamber, close the test chamber door, and after the lubricating oil is heated, inject a certain amount of hot oil into the second metering device 5, start the transmission oil supply device 12, and make the speed of the clutch cover moving shaft reach the specified value; then inject a specified amount of hot oil into the part to be tested 15, and after the working state is stable, check the amount of oil leakage in the first metering device 8 within the specified time period;

[0073] 3) Open the third drain switch 16 of the first metering device 8 to drain the oil. After draining the oil, close the third drain switch 16 and inject the amount of oil leakage observed in the first metering device in step 2) into the clutch sleeve again from the second metering device 5, so that the amount of lubricating oil in the clutch sleeve continues to be maintained at the specified value, that is, replenished to the total amount of oil in the device at the time of the last measurement. Check the amount of oil in the first metering device 8 again within the specified time period, and use this amount of oil as the final test leakage amount.

[0074] Therefore, the oil leakage measurement device and method for rotating parts provided in this embodiment uses a variable frequency motor and transmission device to achieve four fixed speed ranges and stepless speed regulation. The encoder can accurately measure the actual rotation speed of the part under test. By designing the front and rear cavity structure of the test chamber, designing the correct pipeline system logic relationship, and operating each valve switch, the purpose of measuring the actual oil leakage is achieved. The device is simple and convenient to operate, with an intuitive display, automatic temperature control function and high and low oil tank level alarm function. It uses a digital instrument display. This embodiment has successfully developed a brand-new measuring device that meets the testing requirements of the workshop.

[0075] In summary, this invention provides a device and method for measuring oil leakage in the internal cavity of rotating parts, which has the following advantages compared to existing oil leakage measurement methods:

[0076] This oil leakage measurement device includes an oil supply mechanism, a transmission and delivery device, and a metering component housed within the device body. The oil supply mechanism delivers lubricating oil to the part under test, while the transmission and delivery device maintains the part under test in a preset rotational state and delivers the lubricating oil from the supply mechanism to the part. The metering component measures the part under test while it remains in a rotating state. This structural design simulates the actual operating conditions of rotating parts in an aero-engine, improving measurement accuracy. The device has a simple structure and principle, is easy to implement and maintain, and has significant potential for widespread application. This measurement method can realistically simulate the actual operating conditions of rotating parts in an aero-engine, thereby accurately and effectively measuring the internal oil leakage of rotating parts. This method is easy to operate and implement, ensures measurement accuracy, and meets the testing requirements for rotating parts in aero-engines.

[0077] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A device for measuring oil leakage from the inner cavity of a rotating part, characterized in that, Includes the device body (1); The device body (1) is provided with an oil supply mechanism, a transmission oil supply device (12) connected to the oil supply mechanism and rotating and supplying oil to the part to be tested (15), and a metering component for measuring the amount of oil leakage in the inner cavity of the part to be tested (15); the metering component measures the part to be tested (15) while it is in a rotating state. The oil supply mechanism includes a lower oil tank (2) located at the bottom of the device body (1) and an upper oil tank (11) located at the top of the device body (1); the lower oil tank (2), the upper oil tank (11) and the transmission oil delivery device (12) are connected in sequence. The oil supply mechanism also includes a pump unit (9) and a filter (17) connected between the lower oil tank (2) and the upper oil tank (11); The transmission oil delivery device (12) includes a variable frequency motor (12-2), a synchronous belt (12-3), and a hollow shaft (12-4); the output end of the variable frequency motor (12-2) is connected to the synchronous belt (12-3), the synchronous belt is connected to the input end of the hollow shaft (12-4), and the output end of the hollow shaft (12-4) is connected to the part to be tested (15); an encoder (12-1) is also connected to the hollow shaft (12-4). The metering component includes a first metering device (8), which is connected to the inner cavity of the part to be measured (15); The metering component also includes a second metering device (5), which is connected between the oil supply mechanism and the transmission oil delivery device (12); It also includes a test chamber located inside the device body (1), the test chamber being divided into a first test chamber (13) and a second test chamber (14), the part to be tested (15) being fixed in the first test chamber (13); the outlets of the first test chamber (13) and the second test chamber (14) are connected in parallel to the metering component.

2. The device for measuring oil leakage in the inner cavity of a rotating part according to claim 1, characterized in that, It also includes an electrical cabinet (10), which is electrically connected to the oil supply mechanism, the transmission oil conveying device (12), and the metering component.

3. A method for measuring the amount of oil leakage from the inner cavity of a rotating part based on the measuring device described in claim 1 or 2, characterized in that, include: The lubricating oil is supplied by the oil supply mechanism, and the transmission oil delivery device (12) is started to drive the test part (15) to rotate. When the test part (15) stabilizes at the preset speed, the lubricating oil is delivered to the inner cavity of the test part (15) through the transmission oil delivery device (12). The amount of oil leakage in the inner cavity of the test part (15) under the rotating state is measured by the metering component.

4. The measurement method according to claim 3, characterized in that, The specific steps include: First, turn on the power and start the pump set, and inject oil from the lower oil tank (2) to the upper oil tank (11). At the same time, start the electric heating device of the upper oil tank (11) to heat the lubricating oil and maintain it at the specified temperature. While heating, install the part to be tested (15) onto the drive shaft of the test chamber and close the test chamber door. The second step is to inject hot oil into the second metering device (5) after the lubricating oil is heated, start the transmission oil delivery device (12) to stabilize the test part (15) to the preset speed; then inject the preset value of hot oil into the test part (15), and after the working state is stable, check the amount of oil leakage in the first metering device (8) within the preset time period. The third step is to drain the oil from the first metering device (8). After draining the oil, the same amount of oil leaked from the first metering device (8) in the second step is injected into the part to be tested (15) from the second metering device (5) to keep the amount of lubricating oil in the part to be tested (15) at the preset specified value. The amount of oil leaked in the first metering device (8) within the preset time period is checked again, and this amount of oil leak is taken as the final test amount of oil leak.

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