Multi-purpose ground test bench

Abstract

The present invention discloses a multi-purpose ground test bench, comprising: a test bench system, a measurement and control system, a measuring system, an intake system, and an exhaust system disposed on the test bench system. The test bench system is detachably configured to accommodate the installation of various types of test machines, including prototypes and models, and to adaptably connect to the intake and exhaust systems after installation. The measurement and control system is used to measure the output speed and torque of the test machine and adjust the output speed, thereby enabling the prototype machine to realistically simulate its actual operating state. The outlet of the intake system is connected to the test machine to supply the test machine with compressed air of a certain pressure, temperature, and flow rate required for the test. The intake end of the exhaust system is also connected to the intake system and the test machine. The present invention can meet the requirements of ground test benches for various types of air turbine starters, while also taking into account small-power model turbine testing, thereby improving the comprehensive utilization rate of the test bench and reducing testing costs.

Description

Technical Field

[0001] The present invention relates to the field of air turbine starter testing, in particular to a multi-purpose ground test bench. Background Art

[0002] The air turbine starter is mainly used to drive the combustion rotor of the main engine to realize the false start, cold operation and start of the main engine (during the test, the main test items are power measurement, main engine starting, main engine false start, etc.). Its working characteristic is that the output speed changes with the inlet conditions of the air turbine starter (such as pressure, temperature), that is, the acceleration of the output speed is not constant.

[0003] At present, the existing air turbine starter ground test bench mainly consists of a dynamometer system, an air intake system, a test system and a test bench, such as Figure 1 The dynamometer system consists of a dynamometer and a control system, which are used to control the output speed of the air turbine starter. The intake system is used to provide compressed air of different pressures and temperatures to the air turbine starter. The test system is used to measure parameters such as the inlet pressure, inlet temperature, output speed, and output torque of the air turbine starter. The test bench is used to achieve the installation and positioning of the air turbine starter.

[0004] When an air turbine starter undergoes ground bench tests such as performance debugging and factory testing, the existing test method is to allow compressed air of a certain pressure and temperature to enter the air turbine starter, blow the turbine to do work, and output a certain speed and torque after being decelerated by a reducer. The output speed of the air turbine starter is controlled by a dynamometer to operate according to a speed curve with a certain constant acceleration (different working states correspond to different accelerations), thereby realizing the simulation of the air turbine starter's working states such as false starting, cold operation and starting the main engine.

[0005] The existing technology has the following shortcomings:

[0006] (1) The existing test method cannot truly reflect the actual working conditions of the air turbine starter, because when the air turbine starter is working with the rotating rotor, the acceleration of its output speed is not constant, and the air turbine starter will have a large impact torque at the moment of starting, which can easily cause the connecting shaft to break due to excessive torque;

[0007] (2) Since the flow measurement range of the existing test bench is small (0-1 kg / s), and only a specific type of air turbine starter was considered when the test bench was built, the installation method has limitations and cannot meet the test requirements of other types of air turbine starters;

[0008] (3) It is impossible to take into account the performance test of small-power model turbines at the same time. Summary of the Invention

[0009] The present invention provides a multi-purpose ground test bench to solve the technical problems of existing test benches, such as the inability to truly reflect the actual working conditions of air turbine starters, the limitations of installation methods, the inability to meet the test requirements of other models of air turbine starters, and the inability to simultaneously take into account the performance test of small-power model turbines.

[0010] The technical solution adopted in the present invention is as follows:

[0011] A multi-purpose ground test bench comprises: a test bench system serving as an installation support, a measurement and control system, a measuring system, an intake system and an exhaust system arranged on the test bench system; the test bench system is detachably arranged to be suitable for the installation of a test machine including prototypes and models of different models, and for adaptive connection with the intake system and the exhaust system after installation; the measurement and control system is respectively connected to the test machine and the measuring system, so as to measure the output speed and torque of the test machine and adjust the output speed, and to enable the prototype machine to truly simulate its actual working state; the intake system and the exhaust system are respectively connected to the measuring system, and the intake end of the intake system is also connected to an air source, and its opposite outlet end is connected to the test machine, so as to supply the test machine with compressed air of a certain pressure, temperature and flow required for the test, and the intake end of the exhaust system is also respectively connected to the intake system and the test machine.

[0012] Furthermore, the measurement and control system includes a connected control system and a dynamometer system. The control system is also connected to the measurement system. The dynamometer system includes: a dynamometer, a flywheel and a torque and speed integrated sensor arranged on the test bench system and connected in sequence. The torque and speed integrated sensor is connected to the machine to be tested; the dynamometer is used to stop working or adjust the stable speed before the output speed is stabilized, and to measure the output power after the output speed is stabilized; the flywheel is used to simulate the rotor of the prototype machine, so that the prototype machine can truly simulate its actual working state; the torque and speed integrated sensor is used to measure the output torque and speed.

[0013] Furthermore, the measurement and control system also includes a vibration measuring device arranged on the dynamometer, the flywheel and the machine to be tested, and the vibration measuring device is connected to the measurement system.

[0014] Furthermore, the test bench system includes a mounting platform, a mounting bracket fixedly supported on the mounting platform, a fixing seat detachably connected to the mounting bracket, a first transfer pipe group and a second transfer pipe group; the dynamometer and the flywheel disc are installed on the mounting platform in sequence, and the dynamometer, the flywheel disc and the machine to be tested are connected to each other through a connecting shaft, and the torque and speed integrated sensor is connected to the connecting shaft between the flywheel disc and the machine to be tested; the machine to be tested is detachably fixed on the fixing seat, and the first transfer pipe group is detachably connected between the machine to be tested and the outlet end of the intake system, and the second transfer pipe group is detachably connected between the machine to be tested and the exhaust system.

[0015] Furthermore, the first transfer tube group and the second transfer tube group both include a hollow tube body, a pressure measuring point and a temperature measuring point arranged on the hollow tube body; quick-release clamps are provided at both ends of the hollow tube body connected to the prototype machine; flanges are provided at both ends of the hollow tube body connected to the model machine; and a switch valve for controlling its on and off is also provided on the second transfer tube group.

[0016] Furthermore, the air intake system includes an air intake pipe for conveying compressed air, a bellows connected to the air outlet end of the air intake pipe, and an emergency valve, a regulating valve group, a flow metering group, an electric heater, a filter and a quick-opening solenoid valve connected in sequence to the air intake pipe; the emergency valve, the regulating valve group, the flow metering group, the electric heater and the quick-opening solenoid valve are respectively connected to the measuring system; the air intake end of the air intake pipe is connected to the air source, and temperature measuring points and pressure measuring points are respectively provided in the pipeline between the air source and the emergency valve and in the pipeline between the electric heater and the filter, and pressure measuring points are respectively provided in the regulating valve group and in the pipeline between the regulating valve group and the flow metering group, and the temperature sensor provided in the temperature measuring point and the pressure sensor provided in the pressure measuring point are respectively connected to the measuring system.

[0017] Furthermore, the regulating valve group includes a first branch pipe with both ends respectively connected to the intake pipe, a first regulating valve arranged in the intake pipe between the two ends of the first branch pipe, and a second regulating valve arranged in the first branch pipe; a pressure measuring point is provided in the intake pipe between the two ends of the first branch pipe.

[0018] Furthermore, the flow metering group includes a second branch pipe whose two ends are respectively connected to the intake pipe, a first shut-off valve and a first flowmeter sequentially arranged in the intake pipe between the two ends of the second branch pipe, and a second shut-off valve and a second flowmeter sequentially arranged in the second branch pipe; the first shut-off valve is located upstream of the first flowmeter; the second shut-off valve is located upstream of the second flowmeter, and the flow metering range of the second flowmeter is smaller than the flow metering range of the first flowmeter.

[0019] Furthermore, the exhaust system includes an exhaust pipe for discharging compressed air, a quick-closing solenoid valve and a third regulating valve, and a silencer tower, which are sequentially arranged in the exhaust pipe; the air inlet end of the exhaust pipe is connected to the air inlet pipe downstream of the filter, and its opposite air outlet end is connected to the silencer tower, and the exhaust end of the second transfer pipe group is connected to the exhaust pipe upstream of the third regulating valve; the quick-closing solenoid valve is interlocked with the quick-opening solenoid valve, and the quick-closing solenoid valve and the third regulating valve are respectively connected to the measuring system.

[0020] Furthermore, the exhaust system also includes a bleed pipe and a fourth regulating valve arranged in the bleed pipe, and the fourth regulating valve is connected to the measurement system; the air inlet end of the bleed pipe is connected to the air inlet pipe upstream of the emergency valve, and its opposite air outlet end is connected to the silencer tower.

[0021] The present invention has the following beneficial effects:

[0022] In the prior art, the structures of the air inlets and air outlets of prototypes of different models (mainly air turbine starters in the present invention) and model machines of different models (mainly model turbine test pieces in the present invention) are different. In order to enable the multi-purpose ground test bench of the present invention to adapt to the installation tests of prototypes and model machines of different models, the bench system of the present invention is made detachable, and then by disassembling and replacing the structure adapted to the machine to be tested, the adaptive connection between the different models of machines to be tested and the bench system, the air intake system and the exhaust system is met, thereby meeting the ground bench test requirements of various models of air turbine starters while also taking into account the small-power model turbine test, improving the comprehensive utilization rate of the test bench, and reducing the test cost at the same time; in the multi-purpose ground test bench of the present invention, the setting of the measurement and control system can enable the prototype to truly simulate its actual working state, thereby improving the accuracy of the test results and meeting the test test requirements, and the present invention has been verified by a large number of tests, the test process was smooth, and the expected test results were achieved.

[0023] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is an existing air turbine starter bench test device;

[0026] Figure 2 This is a schematic diagram of a multi-purpose ground test bench used for prototype test measurement according to a preferred embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of a multi-purpose ground test bench used for model machine test and measurement in a preferred embodiment of the present invention;

[0028] Figure 4 yes Figure 2 Schematic diagram of the main structure of the mid-stage system;

[0029] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional main structure of the middle fixing seat;

[0030] Figure 6 yes Figure 4 A schematic diagram of the cross-sectional main structure of the first transfer pipe group;

[0031] Figure 7 This is the working state diagram of the air turbine starter during power measurement;

[0032] Figure 8 This is the working state diagram of the air turbine starter during the main engine false start;

[0033] Figure 9 This is the working status diagram of the air turbine starter when the main engine is started.

[0034] Legend

[0035] 10. Test bench system; 11. Mounting platform; 12. Mounting bracket; 13. Fixing seat; 14. First transfer tube assembly; 141. Hollow tube; 142. Pressure measuring point; 143. Temperature measuring point; 144. Quick release clamp; 15. Second transfer tube assembly; 16. Connecting shaft; 21. Prototype; 22. Model; 31. Control system; 32. Dynamometer system; 321. Dynamometer; 322. Flywheel; 323. Torque and speed integrated sensor; 50. Measurement system; 60. Intake system; 61. Intake pipe; 62. Bellows; 63. Emergency valve; 64, regulating valve group; 641, first branch pipe; 642, first regulating valve; 643, second regulating valve; 65, flow metering group; 651, second branch pipe; 652, first shut-off valve; 653, first flow meter; 654, second shut-off valve; 655, second flow meter; 66, electric heater; 67, filter; 68, quick-opening solenoid valve; 69, temperature measuring point; 71, pressure measuring point; 81, exhaust pipe; 82, quick-closing solenoid valve; 83, third regulating valve; 84, silencer tower; 85, vent pipe; 86, fourth regulating valve. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0037] Reference Figure 2 and Figure 3A preferred embodiment of the present invention provides a multi-purpose ground test bench, comprising: a test bench system 10 serving as an installation support, a measurement and control system, a measurement system 50, an intake system 60, and an exhaust system arranged on the test bench system 10; the test bench system 10 is detachably arranged to be suitable for the installation of a test machine including prototype machines 21 and model machines 22 of different models, and for adaptive connection with the intake system 60 and the exhaust system after installation; the measurement and control system is respectively connected to the test machine and the measurement system 50, so as to measure the output speed and torque of the test machine and adjust the output speed, and to enable the prototype machine 21 to truly simulate its actual working state; the intake system 60 and the exhaust system are respectively connected to the measurement system 50, and the intake end of the intake system 60 is also connected to an air source, and its opposite outlet end is connected to the test machine, so as to supply the test machine with compressed air of a certain pressure, temperature, and flow required for the test, and the intake end of the exhaust system is also respectively connected to the intake system 60 and the test machine.

[0038] In the prior art, the structures of the air inlets and air outlets of prototype machines 21 of different models (mainly air turbine starters in the present invention) and model machines 22 of different models (mainly model turbine test pieces in the present invention) are different. In order to enable the multi-purpose ground test bench of the present invention to adapt to the installation tests of prototype machines 21 and model machines 22 of different models, the bench system 10 of the present invention is detachable, and then by disassembling and replacing the structure adapted to the machine to be tested, the adaptive connection between the different models of machines to be tested and the bench system 10, the intake system 60 and the exhaust system is met, thereby meeting the ground bench test requirements of various models of air turbine starters while also taking into account the small-power model turbine test, improving the comprehensive utilization rate of the test bench, and reducing the test cost at the same time; in the multi-purpose ground test bench of the present invention, the setting of the measurement and control system can enable the prototype machine 21 to truly simulate its actual working state, thereby improving the accuracy of the test results and meeting the test test requirements, and the present invention has been verified by a large number of tests, the test process was smooth, and the expected test results were achieved.

[0039] Alternatively, as Figure 2 and Figure 3 As shown, the measurement and control system includes a control system 31 and a dynamometer system 32, which are connected to each other. The control system 31 is also connected to the measurement system 50. The dynamometer system 32 includes: a dynamometer 321, a flywheel 322, and a torque and speed integrated sensor 323, which are arranged on the test bench system 10 and connected in sequence. The torque and speed integrated sensor 323 is connected to the test machine. The dynamometer 321 is used to stop working or adjust the stable speed before the output speed stabilizes, and is used to measure the output power after the output speed stabilizes. The flywheel 322 is used to simulate the rotating rotor of the prototype machine 21, thereby allowing the prototype machine 21 to truly simulate its actual working state. The torque and speed integrated sensor 323 is used to measure the output torque and speed.

[0040] The dynamometer of the prior art is only used to adjust the output speed so that the acceleration of the output speed is constant. Therefore, when the air turbine starter is started, its speed increases rapidly in a short period of time, which causes the dynamometer to quickly output more torque, resulting in a large impact torque of the air turbine starter at the moment of starting, which easily causes the output shaft of the air turbine starter to break due to excessive torque; in the present invention, a new dynamometer 321 is replaced, which can stop working before the output speed is stabilized, thereby avoiding the occurrence of a large impact torque at the moment of starting, solving the technical problem existing in the prior art, and at the same time, it can also adjust the stable speed before the output speed is stabilized to meet the test requirements of the model turbine test piece, and can also measure the output power after the output speed is stabilized to meet the dynamometer requirements.

[0041] In this option, if Figure 2 and Figure 3 As shown, the function of the flywheel disc 322 is as follows: the air turbine starter is used to rotate the combustion rotor of the main engine. The combustion rotor has a certain rotational inertia, so the flywheel disc 322 needs to be designed to simulate the combustion rotor of the main engine, and the rotational inertia value of the flywheel disc 322 is equal to the rotational inertia value of the combustion rotor of the main engine minus the rotational inertia value of the dynamometer 321; when installed, the flywheel disc 322 is installed between the dynamometer 321 and the air turbine starter, and they are connected to each other through a connecting shaft. During the test, different models of air turbine starters are equipped with The flywheel disc 322 has a corresponding rotational inertia; when working, the air turbine starter is mainly used to rotate the combustion rotor of the main engine to realize the false start, cold operation and start of the main engine. By equating the rotational inertia of the combustion rotor to the flywheel disc 322 and the dynamometer 321, during the starting test, the air turbine starter can simulate the working state of the air turbine starter rotating the combustion rotor of the main engine by rotating the flywheel disc 322, thereby providing an important test basis for the development of the air turbine starter and reducing the impact torque at the start-up moment.

[0042] In this option, if Figure 2 and Figure 3 As shown, the measurement and control system also includes vibration measuring devices installed on the dynamometer 321, flywheel 322, and the machine to be tested, and the vibration measuring devices are connected to the measurement system 50. In the present invention, a number of vibration measuring devices are arranged on the air turbine starter, dynamometer 321, and flywheel 322 to monitor the vibration of each rotor component. A torque and speed integrated sensor 323 is also provided to measure the output speed and torque of the air turbine starter. This provides the test bench with multiple protection features against overspeed, overtorque, and excessive vibration, thereby improving test safety.

[0043] Alternatively, as Figure 5As shown, the test bench system 10 includes a mounting platform 11, a mounting bracket 12 fixedly supported on the mounting platform 11, a fixing base 13 detachably connected to the mounting bracket 12, a first transfer pipe assembly 14, and a second transfer pipe assembly 15. A dynamometer 321 and a flywheel disc 322 are sequentially installed on the mounting platform 11, and are connected to each other via a connecting shaft 16. A torque and speed integrated sensor 323 is connected to the connecting shaft 16 between the flywheel disc 322 and the test machine. The test machine is detachably fixed to the fixing base 13, and the first transfer pipe assembly 14 is detachably connected between the test machine and the outlet of the intake system 60, while the second transfer pipe assembly 15 is detachably connected between the test machine and the exhaust system.

[0044] In this option, if Figure 5 As shown, the dynamometer 321, the flywheel 322, and the mounting bracket 12 are respectively mounted on the mounting platform 11. During the first installation, the coaxiality among the mounting bracket 12, the air turbine starter, and the flywheel 322 needs to be adjusted. Since the output shaft sizes of different types of air turbine starters are different, in order to ensure that the mounting bracket 12 does not move after the first installation and reduce unnecessary workload, a detachable fixing seat 13 is designed on the mounting bracket 12, and different types of air turbine starters are equipped with different types of fixing seats 13, as shown in FIG. Figure 5 As shown, the axial distance between the air turbine starter output shaft and the flywheel disc 322 is adjusted by the size L of the fixing seat 13 to meet the interface size requirements.

[0045] In this option, if Figure 6 As shown, the first transfer pipe group 14 and the second transfer pipe group 15 each include a hollow pipe body 141, a pressure measuring point 142 and a temperature measuring point 143 provided on the hollow pipe body 141. The two ends of the hollow pipe body 141 connected to the prototype machine 21 are also provided with quick release clamps 144. The two ends of the hollow pipe body 141 connected to the model machine 22 are also provided with flanges. The second transfer pipe group 15 is also provided with an on-off valve for controlling its on-off. Figure 2 As shown, since the interface sizes of different models of air turbine starters are also different, in order to adapt to different models of air turbine starters, a first transfer pipe group 14 is set at the outlet of the air turbine starter and the intake system 60, which is used to connect the air turbine starter and the intake system 60; a pressure measuring point 142 and a temperature measuring point 143 are set on the hollow tube body 141, which are used to install a pressure sensor and a temperature sensor respectively, for measuring the inlet temperature and pressure of the air turbine starter; the front and rear ends of the hollow tube body 141 are connected in the form of quick-release clamps, which is convenient for disassembly and assembly of the first transfer pipe group 14; the front and rear ends of the hollow tube body 141 of the model turbine test are connected in the form of flanges.

[0046] In this alternative, the comparison Figure 2 and Figure 3 It can be seen that in Figure 2 On the basis of the test bench shown, it is only necessary to add a second transfer pipe group 15 at the outlet of the model turbine test piece and replace the fixing seat 13 and the connecting shaft to meet the requirements of the small-power model turbine performance test and improve the utilization rate of the test bench.

[0047] Alternatively, as Figure 2 and Figure 3 As shown, the air intake system 60 includes an air intake pipe 61 for conveying compressed air, a bellows 62 connected to the outlet end of the air intake pipe 61, and an emergency valve 63, a regulating valve group 64, a flow metering group 65, an electric heater 66, a filter 67, and a quick-opening solenoid valve 68, which are sequentially connected to the air intake pipe 61. The emergency valve 63, the regulating valve group 64, the flow metering group 65, the electric heater 66, and the quick-opening solenoid valve 68 are each connected to the measurement system 50. The air intake end of the air intake pipe 61 is connected to an air source. A temperature measuring point 69 and a pressure measuring point 71 are respectively provided in the pipeline between the air source and the emergency valve 63 and in the pipeline between the electric heater 66 and the filter 67. A pressure measuring point 71 is respectively provided in the regulating valve group 64 and in the pipeline between the regulating valve group 64 and the flow metering group 65. The temperature sensor provided at the temperature measuring point 69 and the pressure sensor provided at the pressure measuring point 71 are each connected to the measurement system 50.

[0048] In this option, if Figure 2 and Figure 3 As shown, during the test, in order to prevent the intake pipe 61 from expanding due to heat and squeezing the air turbine starter and the model turbine test piece, and to facilitate the disassembly and assembly of the air turbine starter and the model turbine test piece, a bellows is set between the first transfer pipe group 14 and the quick-opening solenoid valve 68; a number of pressure sensors and temperature sensors are set on the intake pipe, which are respectively used to monitor the pressure and temperature parameters at various positions of the pipe; the emergency valve 63 is used to quickly cut off the air source for protection; the filter 67 is used to filter metal impurities in the compressed air to prevent metal impurities from entering the air turbine starter and causing damage to it.

[0049] In this option, if Figure 2 As shown, the regulating valve assembly 64 includes a first branch pipe 641, each connected to the intake pipe 61 at both ends; a first regulating valve 642 disposed in the intake pipe 61 between the ends of the first branch pipe 641; and a second regulating valve 643 disposed in the first branch pipe 641. A pressure measuring point 71 is provided in the intake pipe 61 between the ends of the first branch pipe 641. In this alternative embodiment, the first regulating valve 642 is used for coarse adjustment of the air turbine starter intake pressure, while the second regulating valve 643 is used for fine adjustment of the air turbine starter intake pressure.

[0050] In this option, if Figure 2As shown, the flow metering assembly 65 includes a second branch pipe 651 connected at both ends to the intake pipe 61, a first shutoff valve 652 and a first flowmeter 653 sequentially disposed in the intake pipe 61 between the two ends of the second branch pipe 651, and a second shutoff valve 654 and a second flowmeter 655 sequentially disposed in the second branch pipe 651. The first shutoff valve 652 is located upstream of the first flowmeter 653. The second shutoff valve 654 is located upstream of the second flowmeter 655, and the flow meter range of the second flowmeter 655 is smaller than that of the first flowmeter 653. Taking into account the different intake flow rates of different types of air turbine starters, in order to accurately measure the intake flow rate, two sets of flow meters (1kg / s and 2kg / s) are set up respectively. The second flow meter 655 is used to measure the flow rate of 0-1kg / s, the first flow meter 653 is used to measure the flow rate of 1-2kg / s, and the first flow meter 653 and the second flow meter 655 are used simultaneously to measure the flow rate of 2-3kg / s; the first flow meter 653 and the second flow meter 655 are controlled to be on and off respectively by the first shut-off valve 652 and the second shut-off valve 654.

[0051] During operation, the measurement and control system is used to control the operation of the dynamometer 321. When the air turbine starter is performing power measurement and main engine false starting, the dynamometer 321 is used to absorb the power generated by the air turbine starter; the measurement and control system is also used to control the heating of the electric heater 66, the on-off and adjustment of the emergency valve 63, the regulating valve group 64, the flow metering group 65, the quick-opening solenoid valve 68, and the quick-closing solenoid valve 82; in order to ensure the safety of the test, the speed, torque and vibration parameters are provided to the control system 31. If any of the above three parameters exceeds the limit, the emergency valve 63 and the quick-opening solenoid valve 68 are closed at the same time to cut off the compressed air entering the air turbine starter to avoid damage to the air turbine starter.

[0052] Alternatively, as Figure 2 and Figure 3 As shown, the exhaust system includes an exhaust pipe 81 for discharging compressed air, a quick-closing solenoid valve 82, a third regulating valve 83, and a muffler tower 84, which are sequentially arranged in exhaust pipe 81. The inlet end of exhaust pipe 81 communicates with the inlet pipe 61 downstream of the filter 67, and its opposite outlet end is connected to the muffler tower 84. The exhaust end of the second transfer pipe assembly 15 communicates with the exhaust pipe 81 upstream of the third regulating valve 83. The quick-closing solenoid valve 82 is interlocked with the quick-opening solenoid valve 68, and the quick-closing solenoid valve 82 and the third regulating valve 83 are each connected to the measurement system 50.

[0053] In this option, if Figure 2As shown, the opening of the third regulating valve 83 is used to simulate the flow area of ​​the air turbine starter, that is, the opening of the third regulating valve 83 corresponds to different flow areas, which can simulate the flow areas of air turbine starters of different models, and can be used to adjust the turbine outlet pressure when conducting model turbine tests; the quick-opening solenoid valve 68 and the quick-closing solenoid valve 82 are interlocked, and the quick-opening solenoid valve 68 opens when energized, and the quick-closing solenoid valve 82 closes, and the quick-opening solenoid valve 68 is required to be manually opened and the quick-closing solenoid valve 82 is required to be manually closed.

[0054] In this option, if Figure 2 and Figure 3 As shown, the exhaust system also includes a bleed pipe 85 and a fourth regulating valve 86 disposed therein. The fourth regulating valve 86 is connected to the measurement system 50. The inlet end of the bleed pipe 85 communicates with the inlet pipe 61 upstream of the emergency valve 63, and its opposite outlet end is connected to the muffler tower 84. In this optional solution, the fourth regulating valve 86 is used to drain waste from the pipeline from the gas source station to the test bench. Properly opening the fourth regulating valve 86 can reduce pressure fluctuations in the incoming gas flow, thereby preventing inaccurate measurement parameters caused by pressure fluctuations during testing.

[0055] In the present invention, by arranging the first flow meter 653 and the second flow meter 655, the third regulating valve 83, the first transfer pipe group 14 and the second transfer pipe group 15, and the fixing seat 13, the test requirements of different types of air turbine starters can be met and the utilization rate of the test bench can be improved.

[0056] Introduction to the specific test process of air turbine starter:

[0057] (1) The gas source station supplies compressed air of a certain pressure and room temperature to the test bench, and the fourth regulating valve 86 is opened to discharge the sewage from the gas source station to the test bench;

[0058] (2) Open the emergency valve 63, the first regulating valve 642, the first shut-off valve 652 (or the second shut-off valve 654 or both valves simultaneously, depending on the flow rate of the air turbine starter), and the third regulating valve 83 (the valve opening is determined based on the flow area of ​​the air turbine starter), reduce the fourth regulating valve 86, turn on the electric heater 66 to adjust the heating temperature, and adjust the second regulating valve 643 to an appropriate opening so that the temperature and pressure before the third regulating valve 83 meet the test requirements;

[0059] (3) Select the power measurement (or main engine false start or main engine start) program in the control system, and energize the quick opening solenoid valve 68 and the quick closing solenoid valve 82 at the same time. The compressed air with a certain pressure and temperature all enters the air turbine starter. The air turbine starter outputs speed and torque after the turbine works, and drives the flywheel 322 and the dynamometer 321 to rotate together (during the rotation process, the acceleration value of the output speed of the air turbine starter changes with time, such as Figure 7-9 ), after the engine reaches the rated speed, the dynamometer 321 operates to absorb power (whether the dynamometer 321 operates depends on the test items of the air turbine starter. During power measurement and false starting of the main engine, the dynamometer 321 operates to absorb power after the rated speed is reached. During starting of the main engine, the dynamometer 321 does not operate after the rated speed is reached; the dynamometer 321 does not operate until the rated speed is reached). Finally, after the air turbine starter reaches the rated speed or has been running for a certain period of time, the valve is cut off to stop the air supply, completing one starting test.

[0060] (4) Turn off the electric heater 66, notify the gas source station to stop the gas, and turn off the power of each valve and equipment in turn.

[0061] Specific test process of model turbine:

[0062] (1) Install the connecting shaft, the fixing seat 13, the first transfer tube assembly 14, the second transfer tube assembly 15, the model turbine test piece, and remove the flywheel 322 (retain only the flywheel connecting shaft), etc.;

[0063] (2) Manually open the quick-opening solenoid valve 68 and manually open the quick-closing solenoid valve 82;

[0064] (3) The gas source station supplies compressed air of a certain pressure and room temperature to the test bench, and the fourth regulating valve 86 is opened to discharge sewage from the gas source station to the test bench;

[0065] (4) Start the dynamometer 321;

[0066] (5) Open the emergency valve 63, the first regulating valve 642, the first shut-off valve 652 (or the second shut-off valve 654 or both valves simultaneously, depending on the flow rate of the model turbine test piece) in sequence, fully open the third regulating valve 83, reduce the fourth regulating valve 86, turn on the electric heater 66 to adjust the heating temperature, and adjust the first regulating valve 642 and the second regulating valve 643 to appropriate openings;

[0067] (6) The speed of the model turbine test piece is controlled by the dynamometer system. After the temperature of the compressed air is heated to the rated temperature, the first regulating valve 642 and the second regulating valve 643 are adjusted to a larger value, and the third regulating valve 83 is adjusted to a smaller value, thereby changing the turbine inlet and outlet pressures. The stagnation efficiency, equivalent flow rate, and unit effective work under different inlet and outlet pressure ratios are obtained.

[0068] (7) Turn off the electric heater 66, notify the gas source station to stop the gas, and turn off the power of each valve and equipment in turn.

[0069] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A multi-purpose ground test bench, characterized in that: include: A gantry system (10) serving as an installation support, a measurement and control system, a measurement system (50), an air intake system (60), and an exhaust system arranged on the gantry system (10); The test bench system (10) is detachably arranged to be suitable for the installation of the test machine including prototype machines (21) and model machines (22) of different models, and for adaptive connection with the intake system (60) and the exhaust system after installation; The measurement and control system is connected to the machine to be tested and the measurement system (50) respectively, so as to measure the output speed and torque of the machine to be tested and adjust the magnitude of the output speed, and to enable the prototype machine (21) to truly simulate its actual working state; The air intake system (60) and the exhaust system are respectively connected to the measuring system (50), and the air intake end of the air intake system (60) is also connected to the air source, and the air outlet end thereof is connected to the machine to be tested, so as to supply the machine to be tested with compressed air of a certain pressure, temperature and flow required for the test, and the air intake end of the exhaust system is also respectively connected to the air intake system (60) and the machine to be tested; The measurement and control system includes a control system (31) and a dynamometer system (32) connected to each other. The control system (31) is further connected to the measurement system (50). The dynamometer system (32) includes: a dynamometer (321), a flywheel (322) and a torque and speed integrated sensor (323) arranged on the test bench system (10) and connected in sequence. The torque and speed integrated sensor (323) is connected to the machine to be tested. The dynamometer (321) is used to stop working or adjust the stable speed before the output speed is stabilized, and is used to measure the output power after the output speed is stabilized. The flywheel (322) is used to simulate the rotor of the prototype machine (21), thereby enabling the prototype machine (21) to truly simulate its actual working state. The torque and speed integrated sensor (323) is used to measure the output torque and speed. The test bench system (10) comprises a mounting platform (11), a mounting bracket (12) fixedly supported on the mounting platform (11), a fixing seat (13) detachably connected to the mounting bracket (12), a first transfer pipe group (14) and a second transfer pipe group (15); a dynamometer (321) and a flywheel disc (322) are sequentially installed on the mounting platform (11) at intervals, and the dynamometer (321), the flywheel disc (322) and the machine to be tested are connected to each other via a connecting shaft (16), and a torque and speed integrated sensor (323) is connected to the connecting shaft (16) between the flywheel disc (322) and the machine to be tested; the machine to be tested is detachably fixed to the fixing seat (13), and the first transfer pipe group (14) is detachably connected between the machine to be tested and the air outlet end of the intake system (60), and the second transfer pipe group (15) is detachably connected between the machine to be tested and the exhaust system; The first transfer tube group (14) and the second transfer tube group (15) both comprise a hollow tube body (141), a pressure measuring point (142) and a temperature measuring point (143) arranged on the hollow tube body (141); both ends of the hollow tube body (141) connected to the prototype machine (21) are further provided with quick-release clamps (144); both ends of the hollow tube body (141) connected to the model machine (22) are further provided with flanges; and the second transfer tube group (15) is further provided with an on-off valve for controlling its on-off.

2. The multi-purpose ground test bench according to claim 1, characterized in that: The measurement and control system further comprises a vibration measuring device arranged on the dynamometer (321), the flywheel disc (322) and the machine to be tested, and the vibration measuring device is connected to the measurement system (50).

3. The multi-purpose ground test bench according to claim 1, characterized in that: The air intake system (60) includes an air intake pipe (61) for conveying compressed air, a bellows (62) connected to the air outlet end of the air intake pipe (61), and an emergency valve (63), a regulating valve group (64), a flow metering group (65), an electric heater (66), a filter (67) and a quick-opening solenoid valve (68) connected in sequence to the air intake pipe (61); The emergency valve (63), the regulating valve group (64), the flow metering group (65), the electric heater (66) and the quick-opening electromagnetic valve (68) are respectively connected to the measuring system (50); The air inlet end of the air inlet pipe (61) is connected to an air source. A temperature measuring point (69) and a pressure measuring point (71) are respectively provided in the pipeline between the air source and the emergency valve (63) and in the pipeline between the electric heater (66) and the filter (67). A pressure measuring point (71) is respectively provided in the regulating valve group (64) and in the pipeline between the regulating valve group (64) and the flow metering group (65). The temperature sensor provided in the temperature measuring point (69) and the pressure sensor provided in the pressure measuring point (71) are respectively connected to the measurement system (50).

4. The multi-purpose ground test bench according to claim 3, characterized in that: The regulating valve group (64) comprises a first branch pipe (641) with two ends respectively connected to the air intake pipe (61), a first regulating valve (642) arranged in the air intake pipe (61) between the two ends of the first branch pipe (641), and a second regulating valve (643) arranged in the first branch pipe (641); A pressure measuring point (71) is provided in the air inlet pipe (61) between the two ends of the first branch pipe (641).

5. The multi-purpose ground test bench according to claim 3, characterized in that: The flow metering group (65) includes a second branch pipe (651) with both ends respectively connected to the air inlet pipe (61), a first shutoff valve (652) and a first flow meter (653) sequentially arranged in the air inlet pipe (61) between the two ends of the second branch pipe (651), and a second shutoff valve (654) and a second flow meter (655) sequentially arranged in the second branch pipe (651); The first shut-off valve (652) is located upstream of the first flow meter (653); The second shut-off valve (654) is located upstream of the second flow meter (655), and the flow metering range of the second flow meter (655) is smaller than the flow metering range of the first flow meter (653).

6. The multi-purpose ground test bench according to claim 3, characterized in that: The exhaust system includes an exhaust pipe (81) for discharging compressed air, a quick-closing electromagnetic valve (82) and a third regulating valve (83) sequentially arranged in the exhaust pipe (81), and a muffler tower (84); The air inlet end of the exhaust pipe (81) is connected to the air inlet pipe (61) downstream of the filter (67), and the opposite air outlet end is connected to the muffler tower (84). The exhaust end of the second transfer pipe group (15) is connected to the exhaust pipe (81) upstream of the third regulating valve (83). The quick closing solenoid valve (82) is interlocked with the quick opening solenoid valve (68), and the quick closing solenoid valve (82) and the third regulating valve (83) are respectively connected to the measuring system (50).

7. The multi-purpose ground test bench according to claim 6, characterized in that: The exhaust system further includes an exhaust pipe (85) and a fourth regulating valve (86) disposed in the exhaust pipe (85), wherein the fourth regulating valve (86) is connected to the measuring system (50); The air inlet end of the vent pipe (85) is communicated with the air inlet pipe (61) upstream of the emergency valve (63), and the opposite air outlet end is connected to the muffler tower (84).

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