CN112729856A - Measurement and control system of air turbine starter comprehensive test bed - Google Patents
Measurement and control system of air turbine starter comprehensive test bed Download PDFInfo
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- CN112729856A CN112729856A CN202011539475.XA CN202011539475A CN112729856A CN 112729856 A CN112729856 A CN 112729856A CN 202011539475 A CN202011539475 A CN 202011539475A CN 112729856 A CN112729856 A CN 112729856A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention discloses a measurement and control system of an air turbine starter comprehensive test bed, which comprises: the air turbine starter comprehensive test bed measurement and control system measures various data of the whole test system and the tested air turbine starter through the measurement system and transmits the data to the data acquisition and database system, the data acquisition and database system analyzes and arranges the data and transmits the various data to the corresponding control system and protection system, the control system and the protection system adjust the whole test process in real time according to setting, the automation degree of the whole system is high, and the safety of the whole test process is greatly improved due to omnibearing data monitoring.
Description
Technical Field
The invention relates to the field of air turbine starters, in particular to a measurement and control system of an air turbine starter comprehensive test bed.
Background
The jet engine can achieve autonomous working, a certain rotating speed needs to be achieved in advance, then ignition can be successful, and the jet engine can operate automatically, and the starter is a device for driving the engine to start. Starting of the aircraft engine. The structure and cycle of an aircraft gas turbine engine determines that it cannot be started by ignition as autonomously as an automotive engine. Because, in a stationary engine, direct fuel injection ignition is performed, since the compressor does not rotate and the air in front has no pressure, the gas cannot flow backwards, and the turbine cannot be rotated, which burns the combustion chamber and the turbine guide vanes. Therefore, the starting features of a gas turbine engine are: the air flow is required to flow and then the combustion is ignited, namely, the engine must rotate and then start. This is a contradiction, the engine has not started, has not ignited, but has rotated first. According to this starting feature, the engine must be rotated by another energy source before ignition combustion. On the former low-power engine, the power required for driving the engine to reach a certain rotating speed is low, and a starting motor is adopted to drive the engine to rotate, such as a turboprop 5 and a turboprop 6 engine used for a domestic 7 and 8 airplane. However, with the advent of high thrust engines, the electric motor has been unable to provide such a large amount of energy to drive the engine to reach the rotational speed at which ignition combustion occurs, and therefore, a larger amount of energy is required to drive the engine.
The air turbine starter needs to be systematically tested before leaving a factory, and because the air turbine starter works in a high-temperature and high-pressure environment, a corresponding environment also needs to be provided in the testing process, the conventional testing system has poor safety, has high requirements on operators, and is easy to cause accidents due to testing. In addition, the whole test system is disordered, no program flow exists in detection, and the integration is poor.
Disclosure of Invention
In order to solve the problems that safety accidents are easy to occur and system integration is poor in the existing air turbine starter testing process, the invention provides a measurement and control system with high safety performance and good system integration.
In order to achieve the above object, the present invention provides a measurement and control system for an air turbine starter comprehensive test bed, comprising: the system comprises a measuring system, a control system, a data acquisition and database system and a safety system, wherein the measuring system comprises a torque measuring unit used for measuring the torque of the air turbine starter during working; the rotating speed measuring unit is used for measuring the rotating speed of the air turbine starter in working; a flow rate measurement unit for measuring an air flow rate; a pressure measuring unit for measuring air pressure; a temperature measuring unit for measuring an air temperature;
the control system comprises an electric furnace power control unit for controlling the work of the first electric furnace and the second electric furnace according to the temperature measured by the temperature measuring unit; the air source pressure control unit is used for controlling the air source pressure according to the measured air source pressure; the product electromagnetic valve control unit is used for controlling an electromagnetic valve on the air turbine starter; a product pressure control unit for controlling a pressure of the air turbine starter; the cold blowing control unit is used for controlling a cold blowing switch and performing heat dissipation treatment on the tested air turbine starter;
the data acquisition and database system and the safety system comprise pipeline pressure acquisition units for acquiring the pressure of each pipeline; the pipeline flow acquisition unit is used for acquiring the air flow of each pipeline; the pipeline temperature acquisition unit is used for acquiring the temperature of each pipeline; the pressure acquisition unit in front of the turbine is used for acquiring the pressure in front of the turbine; the product rotating speed acquisition unit is used for acquiring the rotating speed of the air turbine starter during working; the product torque acquisition unit is used for acquiring the torque of the air turbine starter during working; and the data storage and playback unit is used for storing and playing back the data acquired by each acquisition unit.
Optionally, the safety system comprises an overspeed alarm protection unit, when the rotating speed of the product exceeds the set maximum rotating speed in the test process, the overspeed alarm protection unit controls to close the air inlet loop, and the control system applies a damping brake to stop the tested product;
the over-temperature protection unit is used for controlling the power supply of the first electric furnace and the second electric furnace to be cut off when the temperature of the air source is higher than a set value according to the acquired signals of the temperature sensor of the main pipeline;
and the electric furnace dry-burning protection unit is used for controlling and cutting off the power supplies of the first electric furnace and the second electric furnace according to the acquired signals of the main pipeline flow sensor when the flow of the air source is smaller than a set value.
Optionally, the threshold set for the air source temperature is 150 ± 10 ℃.
Optionally, the air source pressure control unit controls the air source pressure to be 0.4 MPa.
Further, the measurement and control system comprises the following working steps:
step 1: the air starter measurement and control system is powered up, the measurement system, the control system and the protection system return normal signals through self-checking, sensor signals such as temperature, flow and pressure are checked, and whether the display is normal or not is determined;
step 2: opening an air source valve, and adjusting to an output pressure of about 0.8MPa by using a hand valve;
and step 3: setting the pressure of an air source to be 0.4MPa, sending a control signal by a control system, automatically adjusting the opening of a pneumatic adjusting valve of a main pipeline according to the pressure signal acquired by the pressure measuring unit, and adjusting and maintaining the pressure of the air source to be 0.4 MPa;
and 4, step 4: the switches of the first electric furnace and the second electric furnace are turned on through a control system, wherein the first electric furnace works at full power, the output power of the second electric furnace is controlled by measuring the temperature through the temperature measuring unit, and the temperature of an air source is kept at 150 +/-10 ℃; meanwhile, the control system automatically cuts off the power supplies of the two electric furnaces when the flow of the air source is smaller than a set value according to the flow signal acquired by the pipeline flow acquisition unit; the control system collects signals according to the pipeline temperature collecting unit, and when the temperature of the air source is higher than a set value, the power supplies of the two electric furnaces are automatically cut off;
and 5: the control system adjusts the opening of the pneumatic adjusting valve of the air inlet pipeline of the starter, and automatically adjusts and maintains the air inlet pressure at 0.18 +/-0.018 MPa according to the signal acquired by the pipeline pressure acquisition unit;
step 6: after the test preparation work is finished, a cold blowing switch is turned on to perform heat dissipation treatment on the tested air starter, a pipeline electromagnetic valve and a product electromagnetic valve switch are automatically turned on after the test is started, at the moment, a high-pressure high-temperature air source drives the air starter to start, and after the set disengagement rotating speed of the air starter is reached, an air inlet pipeline is automatically closed.
In addition, in the process of any step, the emergency stop button is pressed, the control system cuts off the power supply of the electric furnace, closes the air source and cuts off the pipeline electromagnetic valve and the product electromagnetic valve.
Furthermore, in the test process, the data acquisition and database system automatically records the operating power, torque, disengaging speed, preswirl pressure and operating time of the product to generate a product operating curve and a qualified criterion.
If the rotating speed of the product exceeds the set highest rotating speed in the test process, the air inlet loop is automatically closed, and the control system applies damping brake to stop the tested product, so that the overspeed protection effect is achieved.
Compared with the prior art, the invention has the beneficial effects that: the measurement and control system of the air turbine starter comprehensive test bed measures various data of the whole test system and the tested air turbine starter through the measuring system, transmits the data to the data acquisition and database system, the data acquisition and database system analyzes and arranges the data, and sends the various data to the corresponding control system and protection system, the control system and protection system adjust the whole test process in real time according to setting, the automation degree of the whole system is high, and the safety of the whole test process is greatly improved due to omnibearing data monitoring.
Drawings
FIG. 1 is an overall block diagram of the present invention;
fig. 2 is a flow chart of the use of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Referring to fig. 1, this embodiment provides an air turbine starter combined test bench system of observing and controling, and this system of observing and controling includes: a measurement system, a control system, a data acquisition and database system, and a security system.
The measuring system comprises a torque measuring unit, a torque measuring unit and a torque measuring unit, wherein the torque measuring unit is used for measuring the torque of the air turbine starter in working; in the embodiment, a torque sensor and a torquer of 1% are selected for torque measurement. And the signal is accessed into a computer acquisition system. The product performance test curve is synchronously output by the computer. The product control valve signal is accessed to a computer data acquisition system and a secondary instrument.
The rotating speed measuring unit is used for measuring the rotating speed of the air turbine starter in working;
a flow rate measurement unit for measuring an air flow rate; in the embodiment, the flow rate of the main circuit is adjusted by adjusting V4, V5 and V6 adjusting valves, and the flow rate control range is 500kg/h to 2500 kg/h. The sensor is a mass flowmeter, and signals are accessed into a computer and an instrument.
A pressure measuring unit for measuring air pressure; the product loop has a product inlet pressure which needs to be adjusted and controlled; the pressure before the vortex needs to be displayed; the pressure at the front end of the filter in the air supply circuit needs to be controlled. A real-time graph of product inlet pressure, turbine inlet pressure may be plotted.
A temperature measuring unit for measuring an air temperature; in the embodiment, the threshold value of the air source temperature is set to be 150 +/-10 ℃, and the air source heating is in the form of air electric furnace heating. And displaying the outlet temperature of the air electric furnace on the air source loop, and setting display control of the inlet temperature of the product in the product loop. 2 paths of temperature signals are required to be remotely displayed, and a real-time curve can be drawn at the product inlet temperature. The remote transmission parameters are all accessed into a computer and an instrument, the temperature sensor adopts a Pt100 thermal resistor, and the precision grade is A grade.
Further, the control system comprises an electric furnace power control unit for controlling the work of the first electric furnace and the second electric furnace according to the temperature measured by the temperature measuring unit;
the air source pressure control unit is used for controlling the air source pressure according to the measured air source pressure; the air source pressure control unit controls the air source pressure to be 0.4 MPa.
The product electromagnetic valve control unit is used for controlling an electromagnetic valve on the air turbine starter;
a product pressure control unit for controlling a pressure of the air turbine starter;
the cold blowing control unit is used for controlling a cold blowing switch and performing heat dissipation treatment on the tested air turbine starter;
further, the data acquisition and database system and the safety system comprise a pipeline pressure acquisition unit for acquiring the pressure of each pipeline; the pipeline flow acquisition unit is used for acquiring the air flow of each pipeline; the pipeline temperature acquisition unit is used for acquiring the temperature of each pipeline; the pressure acquisition unit in front of the turbine is used for acquiring the pressure in front of the turbine; the product rotating speed acquisition unit is used for acquiring the rotating speed of the air turbine starter during working; the product torque acquisition unit is used for acquiring the torque of the air turbine starter during working; and the data storage and playback unit is used for storing and playing back the data acquired by each acquisition unit.
Optionally, the safety system comprises an overspeed alarm protection unit, when the rotating speed of the product exceeds the set maximum rotating speed in the test process, the overspeed alarm protection unit controls to close the air inlet loop, and the control system applies a damping brake to stop the tested product;
the over-temperature protection unit is used for controlling the power supply of the first electric furnace and the second electric furnace to be cut off when the temperature of the air source is higher than a set value according to the acquired signals of the temperature sensor of the main pipeline;
and the electric furnace dry-burning protection unit is used for controlling and cutting off the power supplies of the first electric furnace and the second electric furnace according to the acquired signals of the main pipeline flow sensor when the flow of the air source is smaller than a set value.
The measurement and control system of the air turbine starter comprehensive test bed measures various data of the whole test system and the tested air turbine starter through the measuring system, transmits the data to the data acquisition and database system, the data acquisition and database system analyzes and arranges the data, and sends the various data to the corresponding control system and protection system, the control system and protection system adjust the whole test process in real time according to setting, the automation degree of the whole system is high, and the safety of the whole test process is greatly improved due to omnibearing data monitoring.
Further, referring to fig. 2, the measurement and control system comprises the following working steps:
step 1: the air starter measurement and control system is powered up, the measurement system, the control system and the protection system return normal signals through self-checking, sensor signals such as temperature, flow and pressure are checked, and whether the display is normal or not is determined;
step 2: opening an air source valve, and adjusting to an output pressure of about 0.8MPa by using a hand valve;
and step 3: setting the pressure of an air source to be 0.4MPa, sending a control signal by a control system, automatically adjusting the opening of a pneumatic adjusting valve of a main pipeline according to the pressure signal acquired by the pressure measuring unit, and adjusting and maintaining the pressure of the air source to be 0.4 MPa;
and 4, step 4: the switches of the first electric furnace and the second electric furnace are turned on through a control system, wherein the first electric furnace works at full power, the output power of the second electric furnace is controlled by measuring the temperature through the temperature measuring unit, and the temperature of an air source is kept at 150 +/-10 ℃; meanwhile, the control system automatically cuts off the power supplies of the two electric furnaces when the flow of the air source is smaller than a set value according to the flow signal acquired by the pipeline flow acquisition unit; the control system collects signals according to the pipeline temperature collecting unit, and when the temperature of the air source is higher than a set value, the power supplies of the two electric furnaces are automatically cut off;
and 5: the control system adjusts the opening of the pneumatic adjusting valve of the air inlet pipeline of the starter, and automatically adjusts and maintains the air inlet pressure at 0.18 +/-0.018 MPa according to the signal acquired by the pipeline pressure acquisition unit;
step 6: after the test preparation work is finished, a cold blowing switch is turned on to perform heat dissipation treatment on the tested air starter, a pipeline electromagnetic valve and a product electromagnetic valve switch are automatically turned on after the test is started, at the moment, a high-pressure high-temperature air source drives the air starter to start, and after the set disengagement rotating speed of the air starter is reached, an air inlet pipeline is automatically closed.
In addition, in the process of any step, the emergency stop button is pressed, the control system cuts off the power supply of the electric furnace, closes the air source and cuts off the pipeline electromagnetic valve and the product electromagnetic valve.
Furthermore, in the test process, the data acquisition and database system automatically records the operating power, torque, disengaging speed, preswirl pressure and operating time of the product to generate a product operating curve and a qualified criterion.
If the rotating speed of the product exceeds the set highest rotating speed in the test process, the air inlet loop is automatically closed, and the control system applies damping brake to stop the tested product, so that the overspeed protection effect is achieved.
The step-by-step test is carried out according to the steps, so that the tested air turbine starter can be subjected to all-around performance test, the control on the aspects of air source pressure, air inlet pressure and air source temperature can be ensured in the whole test process, meanwhile, a plurality of data of the whole test system and the air turbine starter are monitored and stored, the subsequent processing and the reference are facilitated, and the improvement of the subsequent air turbine starter is padded.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides an air turbine starter combined test platform system of observing and controling which characterized in that includes: the system comprises a measuring system, a control system, a data acquisition and database system and a safety system, wherein the measuring system comprises a torque measuring unit used for measuring the torque of the air turbine starter during working; the rotating speed measuring unit is used for measuring the rotating speed of the air turbine starter in working; a flow rate measurement unit for measuring an air flow rate; a pressure measuring unit for measuring air pressure; a temperature measuring unit for measuring an air temperature;
the control system comprises an electric furnace power control unit for controlling the work of the first electric furnace and the second electric furnace according to the temperature measured by the temperature measuring unit; the air source pressure control unit is used for controlling the air source pressure according to the measured air source pressure; the product electromagnetic valve control unit is used for controlling an electromagnetic valve on the air turbine starter; a product pressure control unit for controlling a pressure of the air turbine starter; the cold blowing control unit is used for controlling a cold blowing switch and performing heat dissipation treatment on the tested air turbine starter;
the data acquisition and database system and the safety system comprise pipeline pressure acquisition units for acquiring the pressure of each pipeline; the pipeline flow acquisition unit is used for acquiring the air flow of each pipeline; the pipeline temperature acquisition unit is used for acquiring the temperature of each pipeline; the pressure acquisition unit in front of the turbine is used for acquiring the pressure in front of the turbine; the product rotating speed acquisition unit is used for acquiring the rotating speed of the air turbine starter during working; the product torque acquisition unit is used for acquiring the torque of the air turbine starter during working; and the data storage and playback unit is used for storing and playing back the data acquired by each acquisition unit.
2. The air turbine starter comprehensive test bed measurement and control system according to claim 1 is characterized in that: the safety system comprises an overspeed alarm protection unit, when the rotating speed of the product exceeds the set highest rotating speed in the test process, the overspeed alarm protection unit controls the closing of the air inlet loop, and the control system applies a damping brake to stop the tested product;
the over-temperature protection unit is used for controlling the power supply of the first electric furnace and the second electric furnace to be cut off when the temperature of the air source is higher than a set value according to the acquired signals of the temperature sensor of the main pipeline;
and the electric furnace dry-burning protection unit is used for controlling and cutting off the power supplies of the first electric furnace and the second electric furnace according to the acquired signals of the main pipeline flow sensor when the flow of the air source is smaller than a set value.
3. The air turbine starter comprehensive test bed measurement and control system of claim 2, characterized in that: the threshold value set for the air source temperature is 150 +/-10 ℃.
4. The air turbine starter comprehensive test bed measurement and control system of claim 1, characterized in that: the air source pressure control unit controls the air source pressure to be 0.4 MPa.
5. The air turbine starter comprehensive test bed measurement and control system according to claim 1, characterized in that the working steps of the measurement and control system are as follows:
step 1: the air starter measurement and control system is powered up, the measurement system, the control system and the protection system return normal signals through self-checking, sensor signals such as temperature, flow and pressure are checked, and whether the display is normal or not is determined;
step 2: opening an air source valve, and adjusting to an output pressure of about 0.8MPa by using a hand valve;
and step 3: setting the pressure of an air source to be 0.4MPa, sending a control signal by a control system, automatically adjusting the opening of a pneumatic adjusting valve of a main pipeline according to the pressure signal acquired by the pressure measuring unit, and adjusting and maintaining the pressure of the air source to be 0.4 MPa;
and 4, step 4: the switches of the first electric furnace and the second electric furnace are turned on through a control system, wherein the first electric furnace works at full power, the output power of the second electric furnace is controlled by measuring the temperature through the temperature measuring unit, and the temperature of an air source is kept at 150 +/-10 ℃; meanwhile, the control system automatically cuts off the power supplies of the two electric furnaces when the flow of the air source is smaller than a set value according to the flow signal acquired by the pipeline flow acquisition unit; the control system collects signals according to the pipeline temperature collecting unit, and when the temperature of the air source is higher than a set value, the power supplies of the two electric furnaces are automatically cut off;
and 5: the control system adjusts the opening of the pneumatic adjusting valve of the air inlet pipeline of the starter, and automatically adjusts and maintains the air inlet pressure at 0.18 +/-0.018 MPa according to the signal acquired by the pipeline pressure acquisition unit;
step 6: after the test preparation work is finished, a cold blowing switch is turned on to perform heat dissipation treatment on the tested air starter, a pipeline electromagnetic valve and a product electromagnetic valve switch are automatically turned on after the test is started, at the moment, a high-pressure high-temperature air source drives the air starter to start, and after the set disengagement rotating speed of the air starter is reached, an air inlet pipeline is automatically closed.
6. The air turbine starter comprehensive test bed measurement and control system of claim 5, characterized in that during any of the above steps, the emergency stop button is pressed, the control system will cut off the power supply of the electric furnace, close the air supply, cut off the pipeline solenoid valve and the product solenoid valve.
7. The air turbine starter comprehensive test bed measurement and control system of claim 5, characterized in that: in the test process, the data acquisition and database system automatically records the operating power, torque, disengaging speed, preswirl pressure and operating time of the product to generate a product operating curve and a qualified criterion.
8. The air turbine starter comprehensive test bed measurement and control system of claim 5, characterized in that: if the rotating speed of the product exceeds the set highest rotating speed in the test process, the air inlet loop is automatically closed, and the control system applies damping brake to stop the tested product, so that the overspeed protection effect is achieved.
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| CN113323732A (en) * | 2021-06-01 | 2021-08-31 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for measuring turbine work in starting process of aeroengine with running |
| CN114323663A (en) * | 2021-12-13 | 2022-04-12 | 中国航发北京航科发动机控制系统科技有限公司 | Test control safety protection method for hydraulic product of turboshaft turboprop engine |
| CN115524514A (en) * | 2022-11-11 | 2022-12-27 | 四川新川航空仪器有限责任公司 | High-rotation-speed testing platform and testing method for tone wheel |
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| CN113266473A (en) * | 2021-06-01 | 2021-08-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for measuring starting resistance moment of aero-engine under non-loading condition |
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