Test bed for measuring thrust of small engine

Abstract

The invention discloses a test bed for thrust measurement of a small engine, and relates to the technical field of thrust measurement. The invention provides a test bench for measuring thrust of a small engine, and aims to solve the technical problems that most of existing test benches for measuring thrust of small engines in the prior art pay attention to single performance parameters, the capacity of multi-sensor integration is lacked, the measurement workload and cost are increased, and the measurement efficiency is reduced. Comprising a test bench body, an engine mounting rack, a thrust measuring system, a vibration measuring system, an environment pressure measuring system and a consumption measuring system, and the engine mounting rack is arranged on the test bench body and used for mounting a to-be-tested engine; the thrust measuring system is used for measuring the thrust of the engine to be tested; the vibration measurement system is used for measuring vibration generated in the operation process of the engine to be tested; the consumption measuring system is used for measuring the energy consumption of the engine to be tested. The method is suitable for thrust measurement of small engines.

Description

Technical Field

[0001] The invention relates to the technical field of thrust measurement, and in particular to a test bench for thrust measurement of a small engine. Background Art

[0002] With the development of modern aerospace technology and the increasing complexity of flight missions, the trend of miniaturization of aircraft has become increasingly obvious. In order to adapt to diverse application scenarios, especially the demand for high thrust-to-weight ratio engines for small aircraft such as drones and missiles, the research on small turbine engines has received widespread attention. These small turbine engines have the advantages of small size, light weight, and strong thrust, so they are increasingly used in the propulsion systems of new generation aircraft. Compared with large turbine engines, the development and performance evaluation of small engines have unique challenges, especially in the measurement and optimization of key parameters such as thrust, vibration, fuel consumption and thermal efficiency. The demand is becoming more and more urgent.

[0003] In the prior art, the thrust measurement of small engines is mostly carried out using a single sensor or a rigid bracket. This method often faces problems such as unstable measurement data, complex system installation, and uneven force on the thrust sensor in actual operation. Since the thrust of small engines is relatively small and the impact of vibration is significant, the rigid connection structure of traditional thrust measurement equipment often leads to increased measurement errors, thereby affecting the accuracy of engine performance evaluation. In addition, the existing measurement technology usually ignores the synchronous measurement of multiple performance parameters during engine operation, resulting in low test efficiency and the inability to comprehensively and systematically evaluate the overall performance of the engine.

[0004] For vibration measurement, traditional testing methods often use single-axis or dual-axis acceleration sensors, which can only measure vibrations in some directions of the engine. Due to the complex vibration characteristics of small turbine engines, relying only on data from a single direction cannot accurately reflect the vibration state of the engine during operation, which also limits the in-depth analysis of the overall performance of the engine under working conditions. Fuel consumption measurements mostly rely on indirect manual calculations or time-consuming multiple measurement methods, with poor measurement accuracy and real-time performance. In addition, the measurement of parameters such as ambient pressure and tail nozzle temperature is often not integrated in existing devices, which also poses a challenge to improving overall test efficiency.

[0005] Most current test benches focus on a single performance parameter and lack the ability to integrate multiple sensors. They need to perform multiple performance tests such as thrust, fuel consumption, temperature, and vibration separately, which increases the measurement workload and cost and reduces the measurement efficiency. In order to overcome these shortcomings, some researchers in the industry have begun to explore the possibility of multi-sensor integrated test platforms, aiming to complete multiple measurement tasks in one installation to improve the comprehensiveness and consistency of data collection. However, these studies often have problems such as complex equipment and long installation and debugging time, and have not yet formed a relatively mature and practical solution. Summary of the invention

[0006] In view of the technical problem that the existing test benches for thrust measurement of small engines in the prior art mostly focus on a single performance parameter and lack the ability to integrate multiple sensors, and need to perform multiple performance tests such as thrust, fuel consumption, temperature and vibration separately, which increases the measurement workload and cost and reduces the measurement efficiency, the present invention provides an integrated test bench for thrust measurement of small engines; the test bench integrates multiple sensors into the same system, and can simultaneously complete the measurement of multiple performance parameters such as thrust, tail nozzle temperature, ambient pressure, fuel consumption, vibration amplitude and frequency, greatly improving the measurement accuracy and efficiency, and solving the problems of complex system installation, unstable measurement data and lack of multi-parameter synchronous measurement in the prior art, specifically:

[0007] A test bench for measuring thrust of a small engine, comprising a test bench body, an engine mounting frame, a thrust measurement system, a vibration measurement system, an environmental pressure measurement system and a consumption measurement system.

[0008] The engine mounting frame is arranged on the test bench body and is used for mounting the engine to be tested;

[0009] The thrust measurement system is used to measure the thrust of the engine to be tested;

[0010] The vibration measurement system is used to measure the vibration generated by the engine to be tested during operation;

[0011] The consumption measurement system is used to measure the energy consumption of the engine to be tested.

[0012] Furthermore, a preferred embodiment is provided, wherein the test bench body is mounted on the engine mounting frame via a floating bracket.

[0013] Furthermore, a preferred embodiment is provided, wherein the floating bracket is mounted on the test bench body via a fixed bracket.

[0014] Furthermore, a preferred embodiment is provided, wherein the thrust measurement system realizes thrust measurement through a thrust sensor.

[0015] Furthermore, a preferred embodiment is provided, wherein the vibration measurement system realizes vibration measurement by means of a three-axis velocity sensor.

[0016] Furthermore, a preferred embodiment is provided, which also includes an ambient pressure measurement system for measuring ambient pressure.

[0017] A test method for measuring thrust of a small engine, the method being implemented based on the test bench, comprising:

[0018] The step of collecting thrust, vibration and energy consumption data of the engine under test.

[0019] A computer storage medium is used to store a computer program. When the computer reads the computer program, the computer executes the method described.

[0020] A computer includes a processor and a storage medium. When the processor reads a computer program stored in the storage medium, the computer executes the method described.

[0021] The computer program product, as a computer program, implements the method described when the computer program is executed.

[0022] Compared with the prior art, the technical solution provided by the present invention is beneficial in that:

[0023] The present invention provides a test bench for measuring thrust of a small engine. By using a spring sheet connection between a floating support and a fixed support, the engine can be freely stressed and vibrate slightly during the test, thereby ensuring the measurement accuracy of the thrust sensor. This method improves the measurement accuracy of existing sensors. Rigid support is usually used in the technology, which greatly reduces the measurement artifacts caused by installation fixity, ensuring that the real-time measurement of thrust is more accurate and reliable.

[0024] The present invention provides a test bench for measuring thrust of small engines, which has more stable thrust measurement data and can eliminate the uncertainty caused by the local deviation of a single sensor. Compared with the method of measuring thrust with a single sensor in the prior art, this precise configuration of dual sensors improves the reliability and measurement accuracy of the overall system and effectively avoids the measurement deviation that may occur during the test process.

[0025] The present invention provides a test bench for measuring thrust of a small engine, which integrates a three-axis velocity sensor and a signal conditioner for vibration measurement, so that more comprehensive vibration data can be obtained during the operation of the engine. Different from other studies that only use single-axis or dual-axis acceleration sensors, this solution covers all possible vibration directions through three-axis measurement, which can more accurately reflect the vibration state of the engine during operation, thereby providing richer data support for engine performance evaluation and optimization.

[0026] The present invention provides a test bench for measuring thrust of small engines, which introduces a flow sensor into the fuel pipeline to achieve real-time measurement of fuel consumption and provide important operating parameter support. In the prior art, fuel consumption is usually obtained by indirect calculation or manual measurement. This solution improves the real-time and accuracy of data collection through direct measurement, and provides reliable support for the consumption economy evaluation of small engines under different working conditions.

[0027] The present invention provides a test bench for measuring thrust of a small engine. The thermocouple sensor installed at the tail nozzle is used to measure the temperature of the start-up tail nozzle to ensure accurate collection of temperature data. Compared with remote infrared temperature measurement commonly used in other studies, the thermocouple sensor can achieve a more direct and rapid temperature response, avoiding the tray caused by environmental interference or measurement distance, and is helpful to better evaluate the characteristics of the start-up exhaust emission and its performance status.

[0028] The present invention provides a test bench for measuring thrust of small engines. By integrating multiple measurement systems, including thrust, vibration, consumption, ambient pressure and tail nozzle temperature, this solution can complete the collection of key parameters of the fan with one installation, which is rare in current small engine test equipment. This integrated approach reduces the need for multiple installations and commissioning, not only saving thousands of test time, but also improving overall test efficiency and operational safety. Compared with the prior art method of measuring multiple devices separately, the integration and efficiency of this system have been significantly improved.

[0029] The invention provides a test bench for measuring thrust of a small engine, which is suitable for use in work of measuring thrust of a small engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of a test bench for measuring thrust of small engines;

[0031] Figure 2 A top view of a test bench used for measuring thrust of small engines.

[0032] Among them, 1-test bench body, 2-fixed bracket, 3-floating bracket, 4-spring leaf, 5-thrust sensor, 6-engine mounting bracket, 7-three-axis acceleration sensor, 8-pressure sensor, 9-flow sensor, 10-sensor mounting bracket, 11-thermocouple sensor, 12-turbine engine, 13-fuel delivery pipeline. DETAILED DESCRIPTION

[0033] In order to make the advantages and benefits of the technical solution provided by the present invention more clearly reflected, the technical solution provided by the present invention is now further described in detail with reference to the accompanying drawings, specifically:

[0034] Embodiment 1: This embodiment provides a test bench for measuring thrust of a small engine, including a test bench body 1, an engine mounting frame 6, a thrust measurement system, a vibration measurement system, an ambient pressure measurement system and a consumption measurement system.

[0035] The engine mounting frame 6 is arranged on the test bench body 1 and is used for mounting the engine to be tested;

[0036] The thrust measurement system is used to measure the thrust of the engine to be tested;

[0037] The vibration measurement system is used to measure the vibration generated by the engine to be tested during operation;

[0038] The consumption measurement system is used to measure the energy consumption of the engine to be tested.

[0039] Specifically, in the technical solution provided in this embodiment,

[0040] include:

[0041] Test bench body 1

[0042] Function: Serves as the basic structure of the entire system, supporting all components.

[0043] Specific structure: The test bench body 1 is a solid metal table top made of thick steel plate, and the surface is treated with anti-corrosion to ensure long-term stability.

[0044] Installation method:

[0045] Place the test bench body 1 on a flat and solid ground, and calibrate the levelness using a level.

[0046] The test bench body 1 is fixed to the ground by anchor bolts.

[0047] Installation requirements: The horizontality error should be controlled within ±5°.

[0048] Fixed bracket 2

[0049] Function: Used to fix the engine and floating support 3 and provide structural stability.

[0050] Specific structure: The fixed bracket 2 is made of high-strength alloy steel and is equipped with reinforcing ribs to increase the deformation resistance.

[0051] Installation method:

[0052] The fixing bracket 2 is installed at a designated position of the test bench body 1 using high-strength bolts.

[0053] Use a torque wrench to tighten the bolts to the recommended torque value.

[0054] Installation requirements: The spacing between the fixing brackets 2 should match the engine mounting bracket 6.

[0055] Floating bracket 3

[0056] Function: Supports the engine and allows it to move slightly under load to allow thrust measurements to be made.

[0057] Specific structure: displacement is achieved through the spring sheet 4 to ensure the thrust transmission after the engine is stressed.

[0058] Installation method:

[0059] The floating bracket 3 is connected to the fixed bracket 2 by using a spring sheet 4 .

[0060] Adjust the preload force of the spring sheet 4 to ensure that the floating bracket 3 is in a balanced state.

[0061] Installation requirements: The center line of the floating bracket 3 should be coaxial with the center line of the engine and thrust sensor 5.

[0062] Spring sheet 4

[0063] Function: Provides a flexible connection to absorb vibration and displacement generated by the engine.

[0064] Specific structure: Made of highly elastic materials such as spring steel or titanium alloy.

[0065] Installation method: Install the spring sheet 4 between the fixed bracket 2 and the floating bracket 3 to ensure that there is no excessive twisting or stretching.

[0066] Thrust sensor 5

[0067] Function: Measures the thrust produced by the engine.

[0068] Specific structure: high-precision resistance strain sensor, symmetrical installation.

[0069] Installation method:

[0070] The two thrust sensors 5 are symmetrically mounted on both sides of the floating support 3 .

[0071] Connect the data acquisition system and ensure that the signal transmission cable is firm and not loose.

[0072] Operation method: The sensor needs to be calibrated before testing to ensure that the zero point and range accuracy meet the requirements.

[0073] Engine mounting bracket 6

[0074] Function: Used to fix the engine and install it firmly on the floating bracket 3.

[0075] Specific structure: U-shaped or frame structure with good vibration resistance.

[0076] Installation method: Use high-strength bolts and anti-vibration washers to fix the engine on the floating bracket 3.

[0077] Three-axis acceleration sensor 7

[0078] Function: Measure the vibration amplitude and frequency generated by the engine during operation.

[0079] Specific structure: It has three measurement directions and can comprehensively measure vibration data.

[0080] Installation method:

[0081] Fix the sensor in the center of the engine to prevent signal distortion through rigid mounting.

[0082] Connect the signal conditioner and data acquisition card.

[0083] Pressure sensor 8

[0084] Function: Measure ambient pressure and provide environmental reference data for engine testing.

[0085] Installation method: Fix the pressure sensor 8 on the test bench body 1 by means of bolts.

[0086] Flow sensor 9

[0087] Function: Measure fuel consumption and monitor fuel supply.

[0088] Installation method: Install the flow sensor 9 on the fuel delivery pipeline 13 to ensure the sealing.

[0089] Sensor mounting bracket 10

[0090] Function: Install the thermocouple sensor 11 to ensure that it measures the engine exhaust temperature.

[0091] Installation method: Fix the mounting bracket on the test bench body 1 and adjust the sensor position to the engine tail nozzle.

[0092] Thermocouple sensor 11

[0093] Function: Measure the temperature of the engine tail nozzle.

[0094] Specific structure: K-type thermocouple, fast response.

[0095] Installation method: Fix the thermocouple on the mounting bracket and aim the detection head directly at the tail jet.

[0096] Turbine engine 12

[0097] Function: As the device under test, it can measure thrust, vibration and other performances.

[0098] Installation method: Fix it on the floating bracket 3 through the engine mounting bracket 6.

[0099] Fuel delivery line 13

[0100] Function: Deliver fuel to the engine to ensure its stable operation.

[0101] Installation method: Connect the fuel supply system to the engine through pipelines.

[0102] Embodiment 2: This embodiment further limits the test bench for small engine thrust measurement provided in Embodiment 1, and the test bench body is installed with the engine mounting frame 6 via the floating bracket 3.

[0103] Embodiment 3: This embodiment further limits the test bench for small engine thrust measurement provided in Embodiment 2. The floating bracket 3 is installed on the test bench body 1 through the fixed bracket 2.

[0104] Embodiment 4: This embodiment further limits the test bench for thrust measurement of small engines provided in Embodiment 1. The thrust measurement system realizes thrust measurement through the thrust sensor 5.

[0105] Embodiment 5: This embodiment further limits the test bench for small engine thrust measurement provided in Embodiment 1, and the vibration measurement system realizes vibration measurement through a three-axis velocity sensor.

[0106] Embodiment 6: This embodiment further limits the test bench for small engine thrust measurement provided in Embodiment 1, and also includes an ambient pressure measurement system for measuring ambient pressure.

[0107] Embodiment 7: This embodiment provides a test method for measuring thrust of a small engine. The method is implemented based on the test bench provided in Embodiment 1 and includes:

[0108] The step of collecting thrust, vibration and energy consumption data of the engine under test.

[0109] Specifically, the system operation steps include:

[0110] Preparation

[0111] Ensure that the test bench body 1 is level, all components are correctly installed, and the connections are secure.

[0112] Calibrate each sensor, including thrust, pressure, flow and thermocouple sensors 11, to ensure measurement accuracy.

[0113] Engine installation

[0114] Use the engine mounting bracket 6 to fix the engine on the floating bracket 3, ensuring the coaxial position.

[0115] System Connection

[0116] Connect each sensor to the data acquisition system, check whether the cable connection is firm and whether the signal transmission is normal.

[0117] Testing Process

[0118] The engine is started and the power is gradually increased. The thrust sensor 5 measures the thrust and transmits it to the data acquisition system.

[0119] The three-axis acceleration sensor 7 measures vibration data, the thermocouple measures the tail jet temperature, and the flow and pressure sensors 8 record the fuel consumption and ambient pressure respectively.

[0120] Data processing and analysis

[0121] The data acquisition system is used to record and preliminarily analyze various measurement parameters in real time to evaluate the engine's performance, including thrust, vibration, fuel consumption, temperature and other parameters.

[0122] Embodiment 8: This embodiment provides a computer storage medium for storing a computer program. When the computer reads the computer program, the computer executes the method provided in embodiment 7.

[0123] Embodiment 9: This embodiment provides a computer, including a processor and a storage medium. When the processor reads a computer program stored in the storage medium, the computer executes the method provided in embodiment 7.

[0124] Embodiment 10: This embodiment provides a computer program product, which is a computer program. When the computer program is executed, the method provided in embodiment 7 is implemented.

[0125] Implementation Method XI: Combination Figure 1-2This embodiment is described in detail by using specific examples to further describe the technical solution provided above. Specifically:

[0126] In order to achieve thrust measurement in the ground test of the kilogram thrust turbine engine 12, the present embodiment provides a test bench for thrust measurement of a small engine. As shown in the figure, the thrust test device of the test bench includes a test bench body 1, a fixed bracket 2, a floating bracket 3, a spring sheet 4, a thrust sensor 5, and an engine mounting bracket 6.

[0127] During measurement, the center lines of the turbine engine 12, the fixed support 2, the floating support 3, and the thrust sensor 5 are ensured to be coaxial, and the engine drives the floating support 3 to move and exerts force on the thrust sensor 5. The thrust sensor 5 outputs a voltage signal, and the transmission of the voltage signal between the various components is realized through the transmission cable. The signal acquisition system can realize the acquisition of the output voltage signal of the thrust sensor 5.

[0128] The triaxial acceleration sensor 7 of the vibration measurement system of this embodiment is set on the engine. The triaxial acceleration sensor 7 is connected to the signal adapter through a transmission cable, and the signal adapter transmits the electrical signal to the data acquisition card. The triaxial acceleration sensor 7 is fixed on the turbine engine 12 and is rigidly fixed, otherwise resonance and waveform distortion will occur. Since the triaxial acceleration sensor 7 can measure vibration values ​​in three directions, more comprehensive vibration data can be monitored.

[0129] The sensor mounting bracket 10 is installed on the test bench body 1, and the main frame extends into the exhaust outlet of the turbine engine 12. The thermocouple sensor 11 is installed on the main frame, and its sensing part faces the direction of the hot air flow outflow. When the engine is started, the temperature inside the engine is measured in real time.

[0130] A method for measuring various indicators of a tested engine using the engine thrust measurement test bench comprises the following steps:

[0131] Install the test engine and sensors

[0132] The fixed bracket 2 is fixed on the test bench body 1, the floating bracket 3 is connected to the fixed bracket 2 through the spring sheet 4, the engine is placed on the floating bracket 3 via the engine mounting bracket 6, and two thrust sensors 5 of the same type are symmetrically placed on both sides of the thrust bracket axis.

[0133] The three-axis acceleration sensor 7 is fixed on the engine and connected to the signal adapter and the data acquisition card via a transmission cable.

[0134] The sensor is installed on the test bench body 1, and the thermocouple sensor 11 is fixed on the installer and adjusted to the tail nozzle of the engine.

[0135] The flow sensor 9 is installed on the fuel delivery pipeline 13 , and the pressure sensor 8 is fixed on the test bench body 1 .

[0136] Measuring ambient pressure and test engine thrust

[0137] Before the engine is ignited, the pressure sensor 8 outputs a signal to obtain the specific value of the ambient pressure. After the engine is ignited, when the intake parameters of the turbine engine 12 reach the working condition, the thrust frame is in a force balance state, and the force value output by the thrust sensor 5 collected by the sensor data acquisition device is the engine working thrust.

[0138] Measure the vibration amplitude and vibration frequency of the engine under test

[0139] After the turbine engine 12 is in a stable operating state, the three-axis vibration sensor outputs an electrical signal, which is filtered and amplified by the adapter, and the vibration amplitude and vibration frequency are collected.

[0140] Measure the temperature of the engine tail nozzle under test

[0141] After the turbine engine 12 is in a stable operating state, the thermocouple sensor 11 outputs a signal to obtain a description of the temperature field of the engine exhaust.

[0142] The technical solution provided by the present invention is further described in detail above through several specific implementation modes in order to highlight the advantages and benefits of the technical solution provided by the present invention. However, the several specific implementation modes described above are not intended to be used as limitations on the present invention. Any reasonable modification and improvement of the present invention, combination of implementation modes and equivalent substitution within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test bench for measuring thrust of small engines, characterized in that: It includes the test bench, engine mounting frame, thrust measurement system, vibration measurement system, ambient pressure measurement system and consumption measurement system. The engine mounting frame is arranged on the test bench body and is used for mounting the engine to be tested; The thrust measurement system is used to measure the thrust of the engine to be tested; The vibration measurement system is used to measure the vibration generated by the engine to be tested during operation; The consumption measurement system is used to measure the energy consumption of the engine to be tested.

2. A test bench for small engine thrust measurement according to claim 1, characterized in that: The test bench body is mounted on the engine mounting frame via a floating bracket.

3. A test bench for measuring thrust of a small engine according to claim 2, characterized in that: The floating bracket is installed on the test bench body through a fixed bracket.

4. A test bench for small engine thrust measurement according to claim 1, characterized in that: The thrust measurement system realizes thrust measurement through a thrust sensor.

5. A test bench for measuring thrust of a small engine according to claim 1, characterized in that: The vibration measurement system realizes vibration measurement through a three-axis velocity sensor.

6. A test bench for measuring thrust of a small engine according to claim 1, characterized in that: Also included is an ambient pressure measuring system for measuring ambient pressure.

7. A test method for measuring thrust of a small engine, characterized in that: The method is implemented based on the test bench according to claim 1, comprising: The step of collecting thrust, vibration and energy consumption data of the engine under test.

8. A computer storage medium for storing a computing program, characterized in that: When the computer reads the computer program, the computer executes the method of claim 7.

9. A computer, comprising a processor and a storage medium, characterized in that: When the processor reads the computer program stored in the storage medium, the computer executes the method of claim 7 .

10. A computer program product, being a computer program, characterized in that When the computer program is executed, the method of claim 7 is implemented.

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