CN107014620B - Test method and test device for measuring lubricating oil consumption of centrifugal ventilator - Google Patents
Test method and test device for measuring lubricating oil consumption of centrifugal ventilator Download PDFInfo
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- CN107014620B CN107014620B CN201710404505.8A CN201710404505A CN107014620B CN 107014620 B CN107014620 B CN 107014620B CN 201710404505 A CN201710404505 A CN 201710404505A CN 107014620 B CN107014620 B CN 107014620B
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Abstract
The invention discloses a test method and a test device for measuring lubricating oil consumption of a centrifugal ventilator, wherein the test device comprises a lubricating oil tank, a test box, an oil supply simulation assembly, a power simulation assembly, an oil return assembly and a measurement assembly; the test box is connected with the lubricating oil tank through an oil supply pipeline and an oil return pipeline respectively; the oil supply simulation assembly is arranged on the oil supply pipeline and at least comprises a gear nozzle and an oil mist generating device, the gear nozzle sprays lubricating oil into the test box, and the oil mist generating device mixes the lubricating oil and air into oil mist which is then input into the test box; the power simulation assembly is connected with the centrifugal ventilator to drive the centrifugal ventilator to simulate the working state of the centrifugal ventilator in the aircraft engine; the oil return assembly is arranged on the oil return pipeline and used for conveying the lubricating oil accumulated in the test box back to the lubricating oil tank; the measuring component is arranged on the lubricating oil tank, the oil supply pipeline and the oil return pipeline to measure the consumption of the lubricating oil. The method can improve the accuracy of measuring the consumption of the lubricating oil and can accurately reflect the dynamic characteristics of the centrifugal ventilator.
Description
Technical Field
The invention relates to the technical field of aircraft engines, in particular to a test method and a test device for measuring lubricating oil consumption of a centrifugal ventilator.
Background
In the working process of the aircraft engine, the sealed air of the main shaft sealing system enters a bearing cavity of a lubricating oil system through a sealing device, the air and the lubricating oil are mixed to form oil gas in the bearing cavity, and if the oil gas is directly discharged out of the bearing cavity, a large amount of consumption of the lubricating oil is caused, so that a centrifugal ventilator needs to be arranged on a ventilation path between the bearing cavity and the outside.
The centrifugal ventilator works in a complex environment of gas-liquid two-phase flow, the working condition is difficult to simulate by numerical values, and the accuracy and precision of the lubricating oil consumption and the characteristics calculated by analysis software need to be verified, so that the actual working environment needs to be simulated by using a field test to obtain the lubricating oil consumption index and characteristics.
Since centrifugal ventilator characteristics are difficult to test on engines, component testing is required to obtain. Different test schemes can greatly influence the consumption and the characteristics of lubricating oil, the conventional test method of the centrifugal ventilator mainly adopts a static oil-gas measurement method, namely the method is obtained by collecting the lubricating oil at the outlet of the centrifugal ventilator within a certain time and then manually weighing and calculating, the method cannot effectively simulate the oil-gas separation circulation mechanism of the centrifugal ventilator, the test time is limited by a collecting device, the automation degree is low, manual operation has large influence on the test result, and the dynamic characteristics of the centrifugal ventilator cannot be accurately reflected.
Disclosure of Invention
It is a primary object of the present invention to overcome at least one of the above-mentioned disadvantages of the prior art and to provide a test device which is capable of simulating the actual operating environment of a centrifugal ventilator.
Another main object of the present invention is to overcome at least one of the above drawbacks of the prior art and to provide a test method for measuring the consumption of oil of a centrifugal ventilator by dynamic measurement using the above test device.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to one aspect of the invention, a test device is provided for testing the lubricating oil consumption of a centrifugal ventilator of an aircraft engine, wherein the test device comprises a lubricating oil tank, a test box, an oil supply simulation assembly, a power simulation assembly, an oil return assembly and a measurement assembly; the lubricating oil tank is used for storing the lubricating oil; the test box is used for installing the centrifugal ventilator and is connected with the lubricating oil tank through an oil supply pipeline and an oil return pipeline respectively; the oil supply simulation assembly is arranged on the oil supply pipeline and at least comprises a gear nozzle and an oil mist generating device, the gear nozzle sprays the lubricating oil into the test box, and the oil mist generating device mixes the lubricating oil and air into oil mist which is then input into the test box; the power simulation assembly is connected to the centrifugal ventilator to drive the centrifugal ventilator to simulate the working state of the centrifugal ventilator in the aircraft engine; the oil return assembly is arranged on the oil return pipeline and used for conveying the lubricating oil accumulated in the test box back to the lubricating oil tank; the measuring assembly is arranged on the lubricating oil tank, the oil supply pipeline and the oil return pipeline so as to measure the consumption of the lubricating oil.
According to one embodiment of the invention, the test device further comprises a warming oil tank and/or a filter; the heating oil tank is connected with the lubricating oil tank so as to heat the lubricating oil output by the lubricating oil tank and then convey the lubricating oil to the oil supply simulation assembly; the filter is arranged on the oil supply pipeline and is adjacently arranged on the lubricating oil tank so as to filter the lubricating oil output by the lubricating oil tank.
According to one embodiment of the invention, the test box comprises a box body, a spline transmission shaft and a transmission gear; the box body is respectively connected with the gear nozzle, the oil mist generating device and the oil return pipeline; the spline transmission shaft is arranged in the box body and is provided with a connecting end extending out of the box body, and the connecting end is in transmission connection with the power simulation assembly; the transmission gear is arranged in the box body and is in transmission fit between the spline transmission shaft and the centrifugal ventilator.
According to one embodiment of the invention, an air system is connected to the oil mist generating device, and the air system stores air so that the air is supplied to the oil mist generating device when the test device is in operation, and the air and the lubricating oil are mixed into the oil mist by the oil mist generating device.
According to one embodiment of the present invention, the power simulation assembly includes a drive mechanism and a speed increasing gear box; and the driving mechanism is in transmission connection with the centrifugal ventilator through the speed-increasing gear box.
According to one embodiment of the present invention, the driving mechanism is a frequency-modulated motor; and/or, the power simulation assembly further comprises a lubricating system, and the lubricating system is connected to the speed-increasing gear box.
According to one embodiment of the invention, the oil return assembly comprises a radiator; the radiator is arranged on the oil return pipeline to radiate and cool the lubricating oil in the oil return pipeline.
According to one embodiment of the present invention, the testing apparatus further comprises a control test acquisition system; the control test acquisition system is respectively connected with the lubricating oil tank, the oil supply simulation assembly, the power simulation assembly, the oil return assembly and the measuring assembly, and is used for controlling the working states of the lubricating oil tank, the oil supply simulation assembly, the power simulation assembly and the oil return assembly and simultaneously acquiring the measuring information of the measuring assembly.
According to one embodiment of the invention, the test device comprises a vent tube; the ventilation pipe is connected to the top of the lubricating oil tank and the top of the test box.
According to another aspect of the present invention, there is provided a test method for measuring the consumption of centrifugal ventilator oil, comprising the steps of:
arranging a test device, arranging the test device in the above embodiment, and installing a centrifugal ventilator to be tested in the test box;
simulating oil supply, and conveying the lubricating oil and the oil mist into the test box by using the oil supply simulation assembly;
the simulation centrifugal ventilator is driven by the power simulation assembly, and the working state of the centrifugal ventilator in the aircraft engine is simulated;
returning oil, wherein the oil return component is used for conveying the lubricating oil in the test box back to the lubricating oil tank; and
and measuring the consumption of the lubricating oil, measuring the quantity of the lubricating oil in the lubricating oil tank in real time by using the measuring assembly, and calculating the consumption of the lubricating oil of the centrifugal ventilator by comparison.
According to the technical scheme, the test method and the test device for measuring the lubricating oil consumption of the centrifugal ventilator have the advantages and positive effects that:
according to the test device provided by the invention, the oil supply state of the centrifugal ventilator in the working process of the aircraft engine is simulated through the gear nozzle of the oil supply simulation assembly and the oil mist generation device, and the power environment of the centrifugal ventilator in the working process of the aircraft engine is simulated through the driving of the power simulation assembly, so that the test device can accurately simulate various working states of the centrifugal ventilator in the aircraft engine in real time and dynamically, the accuracy of measuring the lubricating oil consumption is further improved, and the dynamic characteristic of the centrifugal ventilator can be accurately reflected.
According to the test method for measuring the lubricating oil consumption of the centrifugal ventilator, by adopting the test device provided by the invention, a test environment which is fully close to a practical working state is established for the centrifugal ventilator, the accuracy of the lubricating oil consumption measured by using the test method is higher, and meanwhile, the dynamic characteristic of the centrifugal ventilator can be accurately reflected.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a system diagram illustrating a test device according to an exemplary embodiment;
fig. 2 is a schematic structural view of a test chamber of the test apparatus shown in fig. 1.
Wherein the reference numerals are as follows:
100. a centrifugal ventilator; 210. a lubricating oil tank; 211. an oil supply pump; 212. a filter; 213. a warming oil tank; 220. a test chamber; 221. a box body; 222. a spline transmission shaft; 223. a transmission gear; 224. installing a shaft; 225. a mist discharge pipe; 231. a gear nozzle; 232. an oil mist generating device; 2321. an air system; 241. a frequency modulation motor; 242. a speed-increasing gear box; 243. a lubrication system; 251. an oil return pump; 252. a heat sink; 261. an oil supply line; 2611. a first branch; 2612. a second branch circuit; 2613. a third branch; 262. an oil return line; 270. controlling the test acquisition system; 280. a vent pipe; SV1, an electromagnetic valve; SV2, a solenoid valve; GV. ball valves; l. a liquid level meter; t1, a temperature transmitter; t2, a temperature transmitter; t3, a temperature transmitter; p1, a pressure transmitter; p2, a pressure transmitter; p3, a pressure transmitter; p4, a pressure transmitter; QF. mass flow meter.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are accordingly to be regarded as illustrative in nature and not as restrictive.
In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "top," "bottom," "between," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the invention.
Test apparatus embodiment
Referring to FIG. 1, a system diagram of a test device capable of embodying the principles of the present invention is representatively illustrated in FIG. 1. In the exemplary embodiment, the test apparatus proposed by the present invention is described by taking as an example a test device that measures the oil consumption of a device under test, and further, by taking as an example a test device that measures the oil consumption of a centrifugal ventilator. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the embodiments described below in order to adapt the test apparatus for use in measuring the consumption of oil by other devices under test or to perform other types of measurements on devices under test, and such changes are within the scope of the principles of the test apparatus as set forth herein.
As shown in fig. 1, in the present embodiment, the test apparatus according to the present invention can be used to test the oil consumption of a centrifugal ventilator 100 of an aircraft engine. The testing device provided by the invention mainly comprises a lubricating oil tank 210, a testing tank 220, an oil supply simulation assembly, a power simulation assembly, an oil return assembly, a measuring assembly, a control test acquisition system 270, a ventilation pipe 280, a related valve bank and other auxiliary pipelines. An exemplary embodiment of a test apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, in the present embodiment, a lubricating oil tank 210 is used to store lubricating oil, a test tank 220 is used to install a centrifugal ventilator 100 to be tested, and the test tank 220 is connected to the lubricating oil tank 210 through an oil supply line 261 and an oil return line 262, respectively, so that oil supply and oil return circuits are formed between the test tank 220 and the lubricating oil tank 210. In addition, vent tube 280 is connected to the top of fuel tank 210 and the top of test chamber 220 to provide a venting function. The oil supply simulation module is disposed on the oil supply pipeline 261 and at least includes a gear nozzle 231 and an oil mist generator 232, the gear nozzle 231 is used for injecting the lubricating oil into the test box 220, and the oil mist generator 232 is used for mixing the lubricating oil and the air into oil mist and inputting the oil mist into the test box 220. The power simulation assembly is connected to the centrifugal ventilator 100 and is used for driving the centrifugal ventilator 100 to simulate the working state of the centrifugal ventilator in the aircraft engine. The oil return assembly is disposed on the oil return line 262 for returning the oil stored in the test chamber 220 to the oil tank 210. The measuring component includes a plurality of kinds of measuring elements, which are respectively disposed at the lubricating oil tank 210, the oil supply pipeline 261, the oil return pipeline 262, and the like, for measuring the consumption of the lubricating oil, and comprehensively detecting the required physical information of each device, element, or pipeline position in the system loop of the control device.
As shown in fig. 1, in the present embodiment, the lubricant tank 210 is connected to the test tank 220 through the oil supply line 261, and the simulated oil supply unit further includes an oil supply pump 211 and a solenoid valve SV1 provided on the oil supply line 261. Specifically, supply pump 211 is adjacent the oil outlet of oil tank 210 for providing delivery power to the oil in supply line 261. The solenoid valve is located between the oil supply pump 211 and the test tank 220, and controls the opening and closing of the oil supply line 261. The portion of the oil supply line 261 after passing through the solenoid valve SV1 is divided into two oil supply branches, i.e., a first branch 2611 and a second branch 2612, which are connected to the test chamber 220, respectively. The gear nozzle 231 is disposed on the first branch 2611 to supply the oil to the gear nozzle 231 through the first branch 2611, and the oil is injected into the test chamber 220 by the gear nozzle 231 to supply the oil with a predetermined pressure, temperature, and flow rate to the friction pair of the centrifugal fan 100. The fuel injector of the gear injector 231 may extend directly into the test chamber 220 or may extend indirectly into the test chamber 220 through the first branch 2611. The oil mist generating device 232 is provided in the second branch 2612, and supplies the oil mist generating device 232 with the lubricant oil of a predetermined pressure, temperature, and flow rate through the second branch 2612, and the oil mist generator mixes the lubricant oil with air to form an oil mist, and then supplies the oil mist to the test chamber 220. The oil mist generator 232 can obtain oil mist with different concentrations and particle size distributions by means of setting different pneumatic atomizing nozzles and adjusting the air-oil flow rate and the oil-oil flow rate.
In addition, the oil mist generating device 232 (or the second branch 2612) should be connected to the test chamber 220 at a position higher than the position where the gear nozzle 231 (or the first branch 2611) is connected to the test chamber 220, in consideration of the operating environment of the centrifugal ventilator and the physical characteristics of the oil and oil mist.
Further, as shown in fig. 1, in the present embodiment, the oil supply module further includes an air system 2321 for providing clean and dry air for atomizing the lubricant oil for the oil mist generator 232. Specifically, the air system 2321 stores air and is connected to the oil mist generation device 232. During operation of the test apparatus, the air system 2321 can feed the stored air into the oil mist generator 232 so that the oil mist generator 232 mixes the air and the lubricating oil into the oil mist required for the test. The pipeline connecting the air system 2321 and the oil mist generator 232 may be divided into two paths (i.e., the air is divided into two paths), wherein one path of air is supplied to the atomizing nozzle located at the center of the oil mist generator 232, and the other path of air radially enters an annular cavity from the oil mist generator 232 and then is mixed with the oil mist sprayed from the atomizing nozzle to form uniform oil mist, and is supplied to the tank 221 through a joint on the tank 221, which is connected to the oil mist generator 232.
Further, as shown in fig. 1, in the present embodiment, the oil supply line 261 is further provided with a warming oil tank 213 connected to the oil tank 210. Specifically, the warming oil tank 213 is located between the oil tank 210 and the solenoid valve SV1 (i.e., the gear nozzle 231 and the oil mist generator 232), and is capable of heating the oil output from the oil tank 210 and then feeding the oil to the gear nozzle 231 and the oil mist generator 232. In other embodiments, the warming oil tank 213 may not be provided according to different test requirements. Also, in the present embodiment, the oil supply line 261 further includes a third branch 2613 arranged on the oil supply line 261 in a line structure in parallel with the warming oil tank 213, and the third branch 2613 is provided with a ball valve GV to be respectively engaged with the deactivation and activation of the warming oil tank 213 by the activation and deactivation of the third branch 2613.
Further, as shown in fig. 1, in the present embodiment, a filter 212 is further provided in the oil supply line 261. Specifically, filter 212 is positioned adjacent to the oil outlet of oil tank 210 to filter oil output from oil tank 210.
Referring to FIG. 2, a schematic diagram of a test chamber 220 of a test apparatus capable of embodying the principles of the present invention is representatively illustrated, and further illustrates, in cross-section, various structures within the test chamber 220 and the mounting structure of the centrifugal ventilator to be tested.
Referring to fig. 1 and 2, in the present embodiment, test chamber 220 mainly includes a case 221, a spline shaft 222, and a transmission gear 223. Specifically, the casing 221 is provided with joints for connecting the gear nozzle 231 and the oil mist generator 232, respectively. The spline shaft 222 is rotatably installed in the case 221 through a bearing, and the spline shaft 222 has a connection end protruding out of the case 221. The transmission gear 223 is disposed within the housing 221 and is in driving engagement with the splined drive shaft 222 and the centrifugal ventilator 100, respectively, to form a driving connection between the splined drive shaft 222 and the centrifugal ventilator 100. The power simulation assembly is connected with the connecting end to drive the spline transmission shaft 222 to rotate, and the transmission gear 223 transmits the rotation of the spline transmission shaft 222 to the centrifugal ventilator 100, so that the power simulation assembly drives the centrifugal ventilator 100.
Further, as shown in fig. 2, in the present embodiment, a mounting shaft 224 is provided in the case 221 through a bearing for mounting the centrifugal ventilator 100 to be tested, and the mounting shaft 224 is in driving engagement with the transmission gear 223. Accordingly, the power transmission in the present embodiment is realized substantially by the power simulation module → the spline transmission shaft 222 → the transmission gear 223 → the mounting shaft 224 → the centrifugal fan 100, but is not limited thereto.
Further, as shown in fig. 2, in the present embodiment, the box 221 is further provided with an oil mist discharge pipe 225, and the oil mist discharge pipe 225 corresponds to the centrifugal ventilator 100 to discharge the oil mist passing through the centrifugal ventilator 100 during the test.
It should be noted that the above description of the test chamber 220 is only exemplary, and the above structural design is intended to construct a relatively closed working space for the centrifugal ventilator 100 and provide connection structures corresponding to the power simulation module, the oil supply simulation module, the ventilation pipe 280 and the oil return pipe 262, respectively. In other embodiments, the specific structure of the test chamber 220 can also be flexibly adjusted according to the test requirement, such as the spline transmission shaft 222, the transmission gear 223 (single gear or gear set), and the like, which can be replaced by other structures or elements, and is not limited to this embodiment.
As shown in fig. 1, in the present embodiment, the power simulation module mainly includes a drive mechanism and a speed-increasing gear box 242. Specifically, the driving mechanism is connected to the connecting end of the spline transmission shaft 222 in a transmission manner, and the speed-increasing gear box 242 is arranged between the driving mechanism and the connecting end to increase the speed in the transmission process, so that the driving environment simulated by the power simulation assembly in the test process more truly conforms to the driving environment of the centrifugal ventilator 100 in the aircraft engine. Preferably, in the present embodiment, the frequency modulation motor 241 is adopted as a driving mechanism of the power simulation assembly, so as to utilize the frequency modulation function of the frequency modulation motor 241 to realize simulation of different driving environments of the centrifugal ventilator 100.
Further, as shown in fig. 1, in the present embodiment, the power simulation assembly further includes a lubrication system 243. Specifically, the lubrication system 243 is connected to the speed increasing gear box 242 to provide a lubrication function to the gear assembly inside the speed increasing gear box 242, thereby improving the lubrication performance.
As shown in fig. 1, in the present embodiment, the oil return unit mainly includes a return pump 251, a radiator 252, and a solenoid valve SV2. Specifically, the return pump 251 is used to provide delivery power to return oil in the return line 262. The radiator 252 is located between the oil return pump 251 and the oil return tank 210, and is configured to radiate heat and cool the return oil in the oil return pipeline 262. Solenoid valve SV2 is located between return pump 251 and test chamber 220 and is used to control the opening and closing of return line 262.
As shown in fig. 1, in the present embodiment, the measurement assembly includes at least one liquid level meter, three temperature transmitters, four pressure transmitters, and one mass flow meter. Specifically, the level meter L is provided on the oil tank 210, and measures the level information of the oil in the oil tank 210. The liquid level meter comprises a liquid level indicator with accurate scales, and can accurately reflect the corresponding relation between the liquid level height change in the lubricating oil tank 210 and the lubricating oil volume, so that the lubricating oil volume consumption of the centrifugal ventilator 100 is measured. A temperature transmitter T1 is disposed on oil supply line 261 adjacent to the oil outlet of warmed oil tank 213 for measuring temperature information of the oil heated by warmed oil tank 213 in oil supply line 261. A temperature transmitter T2 is disposed on oil return line 262 adjacent the outlet of test chamber 220 for measuring temperature information of the return oil exiting test chamber 220. The temperature transmitter T3 is disposed on the oil return line 262 near the oil outlet of the radiator 252, and is used for measuring the temperature information of the oil return after being cooled by the radiator 252. The pressure transmitter P1 is provided at substantially the same position as the temperature transmitter T1, and measures pressure information of the oil supply line 261 at that position. The pressure transmitter P2 is disposed on the first branch 2611 adjacent to the oil inlet of the gear nozzle 231, and is used for measuring pressure information of the first branch 2611. The pressure transmitter P3 is disposed on the second branch 2612 near the oil inlet of the oil mist generator, and is used for measuring pressure information of the second branch 2612. A pressure transducer P4 is provided on the return line 262, preferably at a location between the return pump 251 and the solenoid valve SV2, for measuring pressure information of the return line 262. A mass flow meter QF is provided on the oil supply line 261, preferably on the oil supply line 261 adjacent to the outlet port of the solenoid valve SV1, for measuring the mass flow information of the oil before entering the first branch 2611 and the second branch 2612 (the gear nozzle 231 and the oil mist generator).
In the present embodiment, the types, the numbers, and the installation positions of the above-described components of the measuring unit are selected and arranged based on the comprehensive consideration of the components of the testing apparatus, the connection relationship of the pipelines, and the testing requirements. In other embodiments of the present invention, the type, number, and arrangement position of each element of the measurement assembly can be flexibly adjusted according to the test requirements of different assemblies, pipeline layout designs, and different devices to be tested of the test apparatus, which is not limited to the present embodiment.
Based on the connection relationship between each component and the pipeline of the testing device in the embodiment, the design of the measuring component can be utilized to more accurately measure the consumption of the lubricating oil in the lubricating oil tank 210, namely the consumption of the lubricating oil of the centrifugal ventilator. Meanwhile, the temperature transmitters, the pressure transmitters, the mass flow meters or other possible measuring elements are utilized to collect the temperature, the pressure, the mass flow and other information of each main component or the key position of the pipeline of the testing device, so that the testing accuracy and the experimental data richness are further improved.
As shown in fig. 1, in the present embodiment, the control test acquisition system 270 refers to a system for integrating electrical control, test and data acquisition, which is respectively connected to the lubricating oil tank 210, the oil supply simulation module, the power simulation module, the oil return module and the measurement module, and is used for controlling the operating states of the lubricating oil tank 210, the oil supply simulation module, the power simulation module and the oil return module and acquiring the measurement information of the measurement module. Specifically, the control test acquisition system 270 can perform centralized control on a plurality of devices or elements such as the warming oil tank 213, the solenoid valve SV1, the oil mist generator, the air system 2321, and the solenoid valve SV2, respectively, and can acquire measurement information of each measurement element of the measurement assembly and generate a corresponding control instruction according to different measurement information, through an electrical connection or a wireless connection.
Based on the description of the structure, connection relationship and pipeline layout of each component of the testing device in the present embodiment, the experimental process of the testing device proposed by the present invention is roughly as follows:
after the test has started, the level height of the lubricant at this time, indicated as h1, indicated on the level gauge L (level indicator) of the lubricant tank 210 is first read by the control test acquisition system 270. After the test apparatus has been operated for a unit time t (the lubricant level has dropped significantly), the level height of the lubricant at this time indicated on the level gauge L is read and recorded as h 2. The volume of lubricant V at which the lubricant level drops from h1 to h2 is calculated, and the volume of lubricant consumed per unit time by the centrifugal fan 100 under the specified test conditions is finally obtained as V/t.
In summary, the test device provided by the present invention simulates the oil supply state of the centrifugal ventilator 100 during operation in the aircraft engine through the gear nozzle 231 and the oil mist generator 232 of the oil supply simulation assembly, and simulates the power environment of the centrifugal ventilator 100 during operation in the aircraft engine through the driving of the power simulation assembly, so that the test device can accurately simulate various operating states of the centrifugal ventilator 100 in the aircraft engine in real time and dynamically, thereby improving the accuracy of measuring the lubricating oil consumption, and accurately reflecting the dynamic characteristics of the centrifugal ventilator 100.
It is to be noted herein that the test device illustrated in the drawings and described in the present specification is only one example of the wide variety of test devices that can employ the principles of the present invention. It should be clearly understood that the principles of this invention are in no way limited to any of the details of the test device or any of the components of the test device shown in the drawings or described in this specification.
Test method implementation mode for measuring lubricating oil consumption of centrifugal ventilator
Based on the above exemplary description of the test device, an exemplary embodiment of the test method for measuring the consumption of the lubricating oil of the centrifugal ventilator according to the present invention is described in detail below. The test method for measuring the lubricating oil consumption of the centrifugal ventilator mainly comprises the following steps:
configuring a test device, configuring the test device provided by the invention, and installing a centrifugal ventilator to be tested in a test box;
oil supply is simulated, and lubricating oil and oil mist are conveyed into the test box by using the oil supply simulation assembly;
the centrifugal ventilator is simulated, the power simulation assembly is used for driving the centrifugal ventilator, and the working state of the centrifugal ventilator in the aircraft engine is simulated;
returning oil, namely conveying the lubricating oil in the test box back to a lubricating oil tank by using an oil return component; and
and measuring the consumption of the lubricating oil, measuring the quantity of the lubricating oil in the lubricating oil tank in real time by using the measuring assembly, and calculating the consumption of the lubricating oil of the centrifugal ventilator by comparison.
In summary, the test method for measuring the lubricating oil consumption of the centrifugal ventilator provided by the invention constructs a test environment which is sufficiently close to a practical working state for the centrifugal ventilator by adopting the test device provided by the invention, the accuracy of the lubricating oil consumption measured by using the test method is higher, and meanwhile, the dynamic characteristics of the centrifugal ventilator can be accurately reflected.
It is noted herein that the test method embodiment for measuring centrifugal ventilator oil consumption shown in the drawings and described in the present specification is only one example of the many types of test methods that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any of the details of the test method for measuring centrifugal ventilator oil consumption or any of the components of the test method shown in the drawings or described in the present specification.
Exemplary embodiments of a test method and a test device for measuring the oil consumption of a centrifugal fan according to the invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first", "second", and "third", etc. in the claims and the description are used merely as labels, and are not numerical limitations of their objects.
While the test method and test device for measuring centrifugal ventilator oil consumption in accordance with the present invention have been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.
Claims (9)
1. A test device for testing the oil consumption of a centrifugal ventilator of an aircraft engine, characterized in that it comprises:
a lubricant tank for storing the lubricant;
the test box is used for installing the centrifugal ventilator and is respectively connected with the lubricating oil tank through an oil supply pipeline and an oil return pipeline;
the oil supply simulation assembly is arranged on the oil supply pipeline and at least comprises a gear nozzle and an oil mist generation device, the gear nozzle sprays the lubricating oil into the test box, and the oil mist generation device mixes the lubricating oil and air into oil mist which is then input into the test box;
the heating oil tank is connected with the lubricating oil tank so as to heat the lubricating oil output by the lubricating oil tank and then convey the lubricating oil to the oil supply simulation assembly;
the power simulation assembly is connected to the centrifugal ventilator to drive the centrifugal ventilator to simulate the working state of the centrifugal ventilator in the aircraft engine;
the oil return assembly is arranged on the oil return pipeline and used for conveying the lubricating oil accumulated in the test box back to the lubricating oil tank; and
the measuring assembly is arranged on the lubricating oil tank, the oil supply pipeline and the oil return pipeline to measure the consumption of the lubricating oil, and comprises a liquid level meter arranged on the lubricating oil tank, and the liquid level meter is used for measuring the liquid level information of the lubricating oil in the lubricating oil tank;
the test box comprises a box body, a spline transmission shaft and a transmission gear; the box body is respectively connected with the gear nozzle, the oil mist generating device and the oil return pipeline; the spline transmission shaft is arranged in the box body and is provided with a connecting end extending out of the box body, and the connecting end is in transmission connection with the power simulation assembly; the transmission gear is arranged in the box body and is in transmission fit between the spline transmission shaft and the centrifugal ventilator.
2. The testing device of claim 1, further comprising:
the filter is arranged on the oil supply pipeline and is adjacently arranged on the lubricating oil tank so as to filter the lubricating oil output by the lubricating oil tank.
3. The test device of claim 1, wherein an air system is connected to the oil mist generating device, the air system storing air for feeding the air into the oil mist generating device for mixing the air with the lubricant oil into the oil mist during operation of the test device.
4. The test device of claim 1, wherein the dynamic simulation assembly comprises:
the centrifugal ventilator comprises a driving mechanism and a speed-increasing gear box, wherein the driving mechanism is in transmission connection with the centrifugal ventilator through the speed-increasing gear box.
5. The testing device of claim 4, wherein the drive mechanism is a frequency modulated motor; and/or, the power simulation assembly further comprises a lubricating system, and the lubricating system is connected to the speed-increasing gear box.
6. The testing device of claim 1, wherein the oil return assembly comprises:
the radiator is arranged on the oil return pipeline to radiate and cool the lubricating oil in the oil return pipeline.
7. The testing device of any of claims 1 to 6, further comprising:
the control test acquisition system is respectively connected with the lubricating oil tank, the oil supply simulation assembly, the power simulation assembly, the oil return assembly and the measuring assembly and is used for controlling the working state of the lubricating oil tank, the oil supply simulation assembly, the power simulation assembly and the oil return assembly and simultaneously acquiring the measuring information of the measuring assembly.
8. The testing device of any of claims 1 to 6, further comprising:
and the ventilation pipe is connected with the top of the lubricating oil tank and the top of the test box.
9. A test method for measuring the lubricating oil consumption of a centrifugal ventilator is characterized by comprising the following steps:
configuring a test device, configuring the test device as claimed in any one of claims 1 to 8, and installing a centrifugal ventilator to be tested in the test box;
simulating oil supply, and conveying the lubricating oil and the oil mist into the test box by using the oil supply simulation assembly;
the simulation centrifugal ventilator is driven by the power simulation assembly, and the working state of the centrifugal ventilator in the aircraft engine is simulated;
returning oil, wherein after the centrifugal ventilator stops working, the oil return component is utilized to convey the lubricating oil in the test box back to the lubricating oil tank; and
and measuring the consumption of the lubricating oil, measuring the quantity of the lubricating oil in the lubricating oil tank by using the measuring assembly before oil supply simulation and after oil return simulation respectively, and calculating the consumption of the lubricating oil of the centrifugal ventilator by comparison.
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| CN112304857A (en) * | 2020-12-02 | 2021-02-02 | 中船重工重庆液压机电有限公司 | Oil mist test device |
| CN113049238B (en) * | 2021-03-15 | 2022-06-07 | 中国航发沈阳发动机研究所 | Superspeed centrifugal ventilator performance test device |
| CN113984363A (en) * | 2021-10-29 | 2022-01-28 | 哈尔滨工程大学 | Ventilator test platform, system and method |
| CN116858530B (en) * | 2023-07-19 | 2024-01-09 | 中南大学 | Helicopter transmission system oil mist emergency lubrication test system |
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