Engine test device for cold and hot flow conditions and method of use thereof

Abstract

This invention relates to the field of aero-engine technology, specifically to a device and method for providing hot and cold airflow conditions for engine testing. The device includes a support, a fan inlet fixedly mounted on and connected to the fan, a gas release network detachably installed within the fan inlet, and multiple gas release ports connected to an external gas source, and a monitoring and control component connected to the gas release network and the fan motor, and fixedly connected to the fan. This invention, a device and method for providing hot and cold airflow conditions for engine testing, has a novel structure and can achieve automatic temperature control during flight missions at different altitudes, simulating the real environment of the engine during service, and enabling structural performance evaluation and life assessment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines, in particular to an engine test running cold and hot flow condition device and a use method thereof. BACKGROUND

[0002] When the engine is running on the ground, it is fixed on the ground, so it needs to provide airflow gas through the fan device to simulate the high-speed airflow in flight. The traditional fan that provides airflow gas can only realize normal temperature gas, ignoring the temperature conditions faced by the engine at different flight altitudes. It is not accurate for the design of engine structure reliability and the test of engine service life.

[0003] In recent years, with the continuous improvement of the performance requirements of aircraft, spacecraft, missiles and other products on the engine, the test environment required for ground test running is more stringent. Not only the airflow environment needs to be simulated, but also the different temperatures corresponding to different altitudes in the air. Therefore, in view of the above status, it is urgent to develop an engine test running cold and hot flow condition device and a use method thereof to overcome the deficiencies in current practical applications. SUMMARY

[0004] The purpose of the present application is to provide an engine test running cold and hot flow condition device and a use method thereof to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] An engine test running cold and hot flow condition device, comprising a support, a fan fixedly installed on the support, a fan impeller rotatably installed in the fan, and a fan motor fixedly installed on the fan for driving the fan impeller to rotate, further comprising:

[0007] A fan inlet fixedly installed on the fan and communicating with the fan;

[0008] A gas release pipe network detachably installed in the fan inlet, and a plurality of gas release openings provided on the gas release pipe network, the gas release openings communicating with an external gas source through the gas release pipe network;

[0009] A one-way servo valve fixedly installed on the gas release pipe network; and

[0010] A monitoring and control assembly comprising a terminal control device, the terminal control device being electrically connected to the one-way servo valve, the terminal control device being further connected to the fan motor, and the monitoring and control assembly being further fixedly connected to the fan.

[0011] As a further scheme of the present application: further comprising: a one-way servo valve fixedly installed on the gas release pipe network and electrically connected with the monitoring control assembly.

[0012] As a further scheme of the present application: the monitoring control assembly further comprises:

[0013] A one-way servo valve controller control line, two ends of the one-way servo valve controller control line are respectively electrically connected with the terminal control device and the one-way servo valve;

[0014] A one-way servo valve controller located on the one-way servo valve controller control line;

[0015] A motor frequency converter controller control line, two ends of the motor frequency converter controller control line are respectively connected with the fan motor and the terminal control device, and a motor frequency converter controller is further fixedly installed on the motor frequency converter controller control line; and

[0016] A detection unit, the detection unit is respectively connected with the fan and the terminal control device.

[0017] As a further scheme of the present application: the detection unit assembly comprises:

[0018] A blowpipe, the blowpipe is fixedly installed on the outlet end of the fan;

[0019] A plurality of temperature sensors and air speed sensors, the plurality of temperature sensors and air speed sensors are intervally distributed on the inner wall of the blowpipe;

[0020] A temperature sensor measurement line, two ends of the temperature sensor measurement line are respectively connected with the temperature sensor and the terminal control device; and

[0021] An air flow speed sensor measurement line, two ends of the air flow speed sensor measurement line are respectively connected with the air speed sensor and the terminal control device.

[0022] As a further scheme of the present application: the number of the temperature sensors and the air speed sensors is both two sets, wherein, two sets of temperature sensors are oppositely arranged on the inner wall of the blowpipe, and two sets of air speed sensors are oppositely arranged on the inner wall of the blowpipe.

[0023] As a further scheme of the present application: the number of the gas release ports is four.

[0024] As a further scheme of the present application: the gas in the gas release pipe network is nitrogen or fuel gas.

[0025] The application relates to a method for using an engine test cold and hot airflow condition device, which is applied to the engine test cold and hot airflow condition device, and the method comprises the following steps:

[0026] (1) connecting an external airflow interface with a one-way servo valve, starting a fan motor and a terminal control device;

[0027] (2) determining airflow temperature T and speed S 速 for output targets;

[0028] (3) according to the target values determined in step (2), the terminal control device adjusts the rotation of the fan motor and the gas release flow rate by taking the signals collected by the temperature sensor and the air flow rate as input signals, and finally realizes the required target airflow speed S 速 and the corresponding temperature T.

[0029] As a further scheme of the application: in step (1), the airflow condition is cold airflow or hot airflow.

[0030] As a further scheme of the application: in step (3), the airflow temperature T and speed S 速 are determined according to requirements, the fan motor is controlled by a motor frequency converter controller to realize V 体1 corresponding to the normal-temperature gas, and the one-way servo valve is controlled by a one-way servo valve controller to realize V 体2 corresponding to the cold or hot gas.

[0031] As a further scheme of the application: the temperature calculation method of the mixed cold and hot gas is as follows:

[0032] According to the Clapeyron equation, PV 体 / T=MR / c (1).

[0033] When two kinds of gases at different temperatures are mixed, the substitute formula (1) can be obtained:

[0034] P1V 体1 / T1=M1R1 / c1 (2).

[0035] P2V 体2 / T2=M2R2 / c2 (3).

[0036] Combined formula (2) and (3) can be obtained:

[0037]

[0038] P is considered as a constant in the same fluid environment, and the simplified formula (4) is obtained:

[0039]

[0040] Before and after volume mixing, there are:

[0041] V 体 = V 体1 + V 体2 (6);

[0042] Fluid velocity calculation formula, there are:

[0043]

[0044] In the formula, P is the pressure, V 体 is the volume, T is the temperature, M is the mass, R is the constant, and c is the molar mass;

[0045] When subscript 1, the corresponding physical quantity code of normal temperature gas, subscript 2 is the corresponding physical quantity code of cold and hot gas, no subscript, the corresponding physical quantity code of mixed gas, S 速 is the incoming flow velocity, S 截 is the cross-sectional area of the blowing cylinder;

[0046] Equations (5), (6) and (7) are a system of equations with three unknowns, and V 体1 and V 体2 can be calculated.

[0047] Compared with the prior art, the beneficial effects of the present application are:

[0048] The present application relates to engine ground test, need cold, hot flow conditions to simulate the cold and hot air of engine in different height flight process, verify the structure safety of the structure bearing cold and hot airflow impact and the service life of engine whole machine operation, through the fan device and blowing cylinder driven by frequency converter-high speed motor set, for realizing high speed airflow, the fan end suction port is provided with one-way servo valve controlled nitrogen or gas gas release pipe network, for realizing the rapid mixing of cold and hot gas and normal temperature gas, the one-way servo valve control module is on-off quantity servo control system, and the temperature sensor at the blowing cylinder is closed loop controlled, the airflow temperature of the blowing cylinder is adjusted by controlling the on-off quantity, automatic temperature control during different height flight task can be realized, the real environment of engine service is simulated, the structure performance test and life evaluation are realized. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 It is the overall structure schematic diagram of the cold and hot flow condition device for engine test of the present application.

[0050] Figure 2 It is the control schematic diagram of the cold and hot flow condition device for engine test in the present application.

[0051] Figure 3 It is the cold and hot flow condition device for engine test of the present application Figure 2The enlarged structure schematic diagram of the middle A part.

[0052] In the figure: 1 - support, 2 - fan air inlet, 3 - gas release pipe network, 4 - one-way servo valve, 5 - fan motor, 6 - fan, 7 - fan impeller, 8 - blowpipe, 9 - temperature sensor, 10 - wind speed sensor, 11 - terminal control device, 12 - temperature sensor measurement line, 13 - one-way servo valve controller, 14 - motor frequency converter controller, 15 - one-way servo valve controller control line, 16 - motor frequency converter controller control line, 17 - gas release port, 18 - air flow rate sensor measurement line. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0054] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0055] Please refer to Figures 1-3 The device for cold and hot flow conditions of engine test provided by the embodiments of the present application comprises a support 1, a fan 6 is fixedly installed on the support 1, a fan impeller 7 is rotatably installed in the fan 6, a fan motor 5 for driving the fan impeller 7 to rotate is also fixedly installed on the fan 6, and the device further comprises:

[0056] A fan air inlet 2 is fixedly installed on the fan 6 and communicates with the fan 6;

[0057] A gas release pipe network 3 is detachably installed in the fan air inlet 2, and a plurality of gas release ports 17 are further arranged on the gas release pipe network 3, the gas release ports 17 communicate with an external gas source through the gas release pipe network 3; and

[0058] A monitoring and control assembly is connected with the gas release pipe network 3 and the fan motor 5 respectively and fixedly connected with the fan 6.

[0059] Before the test, the support 1 can be fixed on the ground, the fan motor 5 and the fan 6 are fixed on the support 1 by bolt connection or welding, the fan inlet 2 is welded on the fan 6, the gas release pipe network 3 is installed at the fan inlet 2, nitrogen or fuel gas is released through a plurality of gas release openings 17 on the gas release pipe network 3, cold and hot high-speed airflow during engine ground test can be effectively realized, a theoretical calculation method of cold and hot airflow mixing is provided, through the monitoring control assembly, automatic temperature control during different height flight tasks can be realized, the real environment during engine service is simulated, and the structure performance test and life evaluation are realized.

[0060] In an embodiment of the present application, referring to Figure 1 Further comprising: a one-way servo valve 4, the one-way servo valve 4 is fixedly installed on the gas release pipe network 3 and is electrically connected with the monitoring control assembly.

[0061] In an embodiment of the present application, referring to Figure 1 And Figure 2 The monitoring control assembly comprises:

[0062] A terminal control device 11, the terminal control device 11 is electrically connected with the one-way servo valve 4 through a one-way servo valve controller control line 15;

[0063] A one-way servo valve controller 13, the one-way servo valve controller 13 is located on the one-way servo valve controller control line 15;

[0064] A motor frequency converter controller control line 16, two ends of the motor frequency converter controller control line 16 are connected with the fan motor 5 and the terminal control device 11 respectively, and a motor frequency converter controller 14 is further fixedly installed on the motor frequency converter controller control line 16; and

[0065] A detection unit, the detection unit is connected with the fan 6 and the terminal control device 11 respectively.

[0066] In an embodiment of the present application, the detection unit assembly comprises:

[0067] A blowpipe 8, the blowpipe 8 is fixedly installed at the outlet end of the fan 6;

[0068] A temperature sensor 9 and a wind speed sensor 10, a plurality of sets of the temperature sensor 9 and the wind speed sensor 10 are distributed on the inner wall of the blowpipe 8;

[0069] A temperature sensor measurement line 12, two ends of the temperature sensor measurement line 12 are connected with the temperature sensor 9 and the terminal control device 11 respectively; and

[0070] Air flow rate sensor measuring line 18, both ends of which are connected with the wind speed sensor 10 and the terminal control device 11 respectively.

[0071] In an embodiment of the present application, please refer to Figure 1 and Figure 2 , the number of the temperature sensor 9 and the wind speed sensor 10 is two sets, wherein two sets of temperature sensors 9 are oppositely arranged on the inner wall of the blowpipe 8, and two sets of wind speed sensors 10 are also oppositely arranged on the inner wall of the blowpipe 8.

[0072] In an embodiment of the present application, please refer to Figures 1-3 , the number of the gas release port 17 is four sets.

[0073] In an embodiment of the present application, please refer to Figure 1 , the gas in the gas release pipe network 3 is nitrogen or fuel gas.

[0074] In the process of trial running, the temperature sensor 9 is installed on the inner wall of the blowpipe 8, and the signal collected by the temperature sensor 9 is transmitted to the terminal control device 11 through the temperature sensor measuring line 12 as a control input signal, wherein the terminal control device 11 can be in the form of a computer, and the signal collected by the wind speed sensor 10 is transmitted to the terminal control device 11 through the air flow rate sensor measuring line 18, the terminal control device 11 controls the on-off value of the one-way servo valve controller 13 through the one-way servo valve controller control line 15, and the terminal control device 11 also controls the motor frequency converter controller 14 through the motor frequency converter controller control line 16, so as to control the rotating speed of the fan motor 5, and realize the wind speed control.

[0075] In addition, the one-way servo valve 4 at one end of the gas release pipe network 3 can be connected with nitrogen or fuel gas, and the other end is provided with four gas release ports 17, by controlling the on-off value of the one-way servo valve 4, nitrogen or fuel gas with different flow rates is mixed into the fan inlet 2.

[0076] The specific implementation process is as follows:

[0077] (1) When the incoming flow condition is cold air flow, first connect the liquid nitrogen bottle outlet to the one-way servo valve 4, start the terminal control device 11, and start the fan motor 5, and according to the incoming flow temperature T, speed S 速 is the output target, the terminal control device 11 takes the signal collected by the temperature sensor 9 and the signal collected by the wind speed sensor 10 as the input signal, controls the one-way servo valve controller 13 and the motor frequency converter controller 14, so as to adjust the rotating speed of the fan motor 5 and the release amount of nitrogen, and realize the incoming flow temperature T, speed S 速 .

[0078] (2) When the incoming flow condition is cold air flow, first connect the gas chamber outlet to the one-way servo valve 4, start the terminal control device 11, and start the fan motor 5, according to the incoming flow temperature T, speed S 速 The output target is controlled by the terminal control device 11 using the signals collected by the temperature sensor 9 and the signals collected by the wind speed sensor 10 as input signals, controlling the one-way servo valve controller 13 and the motor frequency converter controller 14, so as to adjust the rotating speed of the fan motor 5 and the release amount of nitrogen, so as to realize the incoming flow temperature T, speed S 速 .

[0079] The temperature calculation method of the mixed cold and hot mixed gas provided by the application is as follows:

[0080] According to the Clapeuron equation, PV 体 / T = MR / c (1).

[0081] When two different temperature gases are mixed, the substitute formula (1) can be obtained:

[0082] P1V 体1 / T1 = M1R1 / c1 (2).

[0083] P2V 体2 / T2 = M2R2 / c2 (3).

[0084] Combined formula (2) and (3) can be obtained:

[0085]

[0086] P is considered to be a constant in the same fluid environment, and after simplifying formula (4), the following is obtained:

[0087]

[0088] Before and after volume mixing, there are:

[0089] V 体 = V 体1 + V 体2 (6).

[0090] The fluid velocity calculation formula is:

[0091]

[0092] In the formula, P is the pressure, V 体 is the volume, T is the temperature, M is the mass, R is the constant, and c is the molar mass; when there is a subscript 1, it is the physical quantity corresponding to the normal temperature gas, when there is a subscript 2, it is the physical quantity corresponding to the cold (nitrogen) and hot (fuel gas) gas, and when there is no subscript, the number is the physical quantity corresponding to the mixed gas, S 速For the incoming flow velocity (known), S 截 For the blowpipe cross-sectional area (known).

[0093] Equations (5), (6), (7) are a set of equations for three unknowns, and the calculation can obtain V 体1 And V 体2 .

[0094] The temperature control method of the cold and hot mixed gas after mixing proposed in the application is based on the above calculation method. In actual use, the incoming flow temperature T and speed S 速 are determined according to the requirements, and the V 体1 corresponding to the normal temperature gas is realized by the frequency converter control high-speed motor, the V 体2 corresponding to the cold (nitrogen) or hot (gas) gas is controlled by the on-off quantity servo control system, and finally the target gas flow speed S 速 corresponding to the temperature T is realized.

[0095] As described above, the realization of the above-mentioned purpose needs to design a fan device driven by a frequency converter-high-speed motor and a blowpipe for realizing high-speed airflow. Temperature sensors and air flow rate sensors are arranged along the blowpipe for temperature acquisition and air flow rate acquisition, which are fed back to a computer to realize control. A one-way servo valve is arranged at the air suction port of the fan for controlling the nitrogen and gas release amount of the nitrogen and gas release pipe network to realize the rapid mixing of cold and hot gases with normal temperature gases. The three-way valve control module is an on-off quantity servo control system, which adjusts the nitrogen and gas release amount by controlling its on-off quantity to realize the airflow temperature at the blowpipe outlet.

[0096] The nitrogen or gas release flow is adjusted by the one-way servo valve control module to control the cold and hot airflow temperature. To achieve this purpose, a temperature calculation method for mixed cold and hot gases after mixing is proposed, which is assisted by a temperature sensor-on-off quantity servo control system to realize automatic temperature control during different height flight missions, simulate the real environment during engine service, and realize the structure performance test and life evaluation.

[0097] It should be noted that in the present application, unless otherwise specified and limited, the terms "sliding", "rotating", "fixed", "provided with" and the like should be understood broadly, for example, it can be a welded connection, or a bolted connection, or integrated; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0098] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. An engine test device for adjusting the temperature and flow conditions of the cold and hot air, comprising a support, a fan is fixedly installed on the support, a fan impeller is rotatably installed in the fan, and a fan motor for driving the fan impeller to rotate is also fixedly installed on the fan, characterized in that, Also comprising: The fan inlet is fixedly installed on the fan and communicates with the fan; The gas release pipe network is detachably installed in the fan inlet, and a plurality of gas release openings are further provided on the gas release pipe network, which communicates with the external gas source through the gas release pipe network; The one-way servo valve is fixedly installed on the gas release pipe network; and The monitoring control assembly comprises a terminal control device, which is electrically connected with the one-way servo valve, and is further connected with the fan motor, and the monitoring control assembly is further fixedly connected with the fan; The monitoring control assembly further comprises: a one-way servo valve controller control line, both ends of which are electrically connected with the terminal control device and the one-way servo valve; The one-way servo valve controller is located on the one-way servo valve controller control line; The motor frequency converter controller control line is connected with the fan motor and the terminal control device at both ends, and the motor frequency converter controller is further fixedly installed on the motor frequency converter controller control line; and The detection unit is connected with the fan and the terminal control device respectively.

2. The device for adjusting the hot and cold flow conditions for engine test running according to claim 1, characterized in that, The components of the detection unit comprise: The blow gun is fixedly installed at the outlet end of the fan; The temperature sensor and the air speed sensor are multiple sets, and multiple sets of the temperature sensor and the air speed sensor are distributed on the inner wall of the blow gun at intervals; The temperature sensor measurement line is connected with the temperature sensor and the terminal control device at both ends; and The air flow speed sensor measurement line is connected with the air speed sensor and the terminal control device at both ends.

3. The device for adjusting the hot and cold flow conditions for engine test running according to claim 2, characterized in that, The number of the temperature sensor and the air speed sensor is two sets, wherein two sets of temperature sensors are oppositely arranged on the inner wall of the blow gun, and two sets of air speed sensors are also oppositely arranged on the inner wall of the blow gun.

4. The device for adjusting the cold and hot flow conditions of the engine test according to any one of claims 1 to 3, characterized in that, The number of the gas release opening is four sets.

5. The device for adjusting the hot and cold flow conditions for engine test running according to claim 1, characterized in that, The gas in the gas release pipe network is nitrogen or fuel gas.

6. A method of using a device for adjusting the conditions of hot and cold flow for engine run-up, characterized in that, The method for adjusting the cold and hot flow conditions of the engine test device according to any one of claims 1-5 comprises the following steps: (1) connecting the interface of the external airflow with the one-way servo valve, starting the fan motor and the terminal control device; (2) determine the incoming flow temperature T and velocity S 速 Output target (3) According to the target value determined in step (2), the terminal control device adjusts the rotation of the fan motor and the gas release flow rate using the signals collected by the temperature sensor and the wind speed sensor as input signals, and finally achieves the required target air flow speed S 速 The temperature T corresponding to the target 7. The method of using the device for adjusting the cold and hot flow conditions for engine run-up testing of claim 6, wherein, In step (1), the flow conditions are cold airflow or hot airflow.

8. The method of using the device for adjusting the cold and hot flow conditions for engine run-up testing of claim 6, wherein, In step (3), the inlet temperature T and speed S are determined according to the demand 速 The fan motor is controlled by the motor frequency converter controller to realize V corresponding to the normal temperature gas 体1 The one-way servo valve is controlled by the one-way servo valve controller to realize V corresponding to the cold or hot gas 体2 .

9. The method of using the device for adjusting the cold and hot flow conditions for engine run-up testing of claim 8, wherein, The temperature calculation method after mixing of the cold and hot mixed gas is as follows: According to the Clapeiron equation, PV 体 T = MR / c (1); When two different temperature gases are mixed, the substitute formula (1) can be obtained: P1V 体1 / T1 = M1R1 / c1 (2); P2V 体2 T2 = M2R2 / c2 (3) Combined with formulas (2) and (3), the following formula (4) can be obtained: P is considered as a constant in the same fluid environment, and the simplified formula (4) is as follows: Before and after volume mixing, there are: V 体 = V 体1 + V 体2 (6); The fluid velocity calculation formula is as follows: In the formula, P is pressure, and V is... 体 Let T be volume, M be temperature, R be mass, and c be molar mass. S with subscript 1 is the physical quantity code corresponding to the normal temperature gas, S with subscript 2 is the physical quantity code corresponding to the cold and hot gas, and S without subscript is the physical quantity code corresponding to the mixed gas 速 is the incoming flow velocity, S 截 is the cross-sectional area of the blow gun Equations (5), (6) and (7) are a set of equations for three unknowns, and the calculation can obtain V 体1 and V 体2 .

Images