CN113721539A - Automatic control system and method for aeroengine lubricating oil interruption test - Google Patents
Automatic control system and method for aeroengine lubricating oil interruption test Download PDFInfo
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- CN113721539A CN113721539A CN202110972742.0A CN202110972742A CN113721539A CN 113721539 A CN113721539 A CN 113721539A CN 202110972742 A CN202110972742 A CN 202110972742A CN 113721539 A CN113721539 A CN 113721539A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention relates to an automatic control system and a method for an aeroengine lubricating oil interruption test, wherein the system comprises an upper computer, a PLC module and a control module, wherein the upper computer is used for performing man-machine interaction and sending an operation instruction to the PLC module; the electronic controller is used for acquiring the lubricating oil pressure value of the engine and outputting a lowest lubricating oil pressure signal to the PLC module when the lubricating oil pressure value reaches a lowest limit value; and the PLC module is used for receiving the operation instruction sent by the upper computer, receiving the lowest lubricating oil pressure signal sent by the electronic controller as a starting basis, and controlling the lubricating oil pipeline to start or stop oil supply. The invention has the effect of automatically controlling the oil cut-off in the lubricating oil cut-off test process, and improves the accuracy and safety of control.
Description
Technical Field
The invention belongs to the technical field of engine tests, and particularly relates to an automatic control system and method for an aeroengine lubricating oil interruption test.
Background
Referring to fig. 1, which is a schematic diagram of a principle of an engine oil interruption test, an oil interruption conversion valve is additionally installed at an oil supply end of an engine, when oil is normally delivered, the conversion valve is respectively connected with oil pipes at two ends, when oil interruption is needed, the conversion valve is controlled to be switched to an inlet communicated with atmosphere by an operation table board, and at the moment, an inlet of a booster stage of the oil pump sucks air and is not supplied with oil. When the oil supply needs to be recovered after the interruption of the lubricating oil, the control conversion valve is switched to the oil supply path, at the moment, the inlet of the pressurizing level of the lubricating oil pump sucks the lubricating oil normally, and the system recovers the normal oil supply.
The 24VDC power supply, the console switch and the fuel cut-off switch valve constitute a control circuit, and the fuel cut-off switch valve is installed on the oil supply line. The oil-cut-off conversion valve is controlled to be switched on and off through the console switch, so that the oil cutting-off and oil supply of the engine are controlled, and an oil-cut-off test is completed.
There are generally two types of aero-engine lubrication interruption procedures: one is that when the engine reaches the specified state, the oil-cut change-over valve is switched, and the oil is cut off and kept for the required time, and then the oil is recovered; the other is a periodic interruption test, i.e. the periodic interruption is performed when the engine is in a required state under specified conditions.
The related technology has the following problems that the control process of the lubricating oil interruption test is purely controlled by an operator manually, the control difficulty is high, the control precision is difficult to control, and the effective completion of the test task is influenced. Particularly, in a periodic oil interruption test, an operator is very prone to make mistakes in a nervous test environment, and if correct judgment and emergency treatment cannot be made in time, the engine can be seriously damaged.
Disclosure of Invention
Aiming at the problems, the invention discloses an automatic control system and method for an aeroengine lubricating oil interruption test.
In a first aspect, the invention discloses an automatic control system for an aeroengine lubricating oil interruption test, which comprises the following technical scheme,
an automatic control system for an aeroengine lubricating oil interruption test comprises an upper computer, a PLC module and a control module, wherein the upper computer is used for performing man-machine interaction and sending an operation instruction to the PLC module;
the electronic controller is used for acquiring the lubricating oil pressure value of the engine and outputting a lowest lubricating oil pressure signal to the PLC module when the lubricating oil pressure value reaches a lowest limit value;
and the PLC module is used for receiving the operation instruction sent by the upper computer and the lowest lubricating oil pressure signal sent by the electronic controller and is used as a starting basis for controlling the lubricating oil pipeline to start or interrupt oil supply.
Furthermore, the PLC module controls the starting or the interruption of the oil supply of the lubricating oil pipeline specifically comprises,
if the lowest lubricating oil pressure signal sent by the electronic controller is received within the time t1, the PLC module is used for controlling the lubricating oil pipeline to interrupt oil supply and last for a time t2, and then controlling the lubricating oil pipeline to continuously supply oil within a time t3 and performing periodic circulation;
and if the lowest lubricating oil pressure signal sent by the electronic controller is not received within the time t1, the PLC module is used for controlling the lubricating oil pipeline to supply oil continuously, and the test is terminated.
Further, the system further includes a timer T0 and a timer T1 for sending timing signals to the PLC module, the timer T0 and the timer T1 sending timing signals to the PLC module specifically includes,
the timer T0 sends a timing signal of the timer T0 to the PLC module after timing T1, if the PLC module receives a lowest lubricating oil pressure signal sent by the electronic controller within a time T1, the timer T1 starts timing and lasts for a time T2, and sends a timing signal of the timer T1 to the PLC module.
Further, the system also comprises a counter, wherein the counter is used for recording the cycle number of the lubricating oil interruption test,
the counter recording the number of cycles of the lubricant break test specifically includes,
when the PLC module receives the lowest oil pressure signal sent by the electronic controller within the time T1 and the timer T1 keeps timing T2, triggering the counter and enabling the counter T0 to count times and add 1;
when the PLC module does not receive the lowest oil pressure signal sent by the electronic controller within the time t1, the counter is triggered and stops counting.
Furthermore, the oil-break switching valve is arranged on the lubricating oil pipeline, the system also comprises a timer T2, the timer T2 is used for recording the accumulated time of the lubricating oil break test, and the method specifically comprises the following steps,
the timer T2 records the power-on time of the fuel-cut switching valve on the lubricating oil pipeline;
the timer T2 starts to time every time the oil-cut switching valve is electrified;
the de-energizing of the fuel cut-off switch valve stops the timer T2 and maintains its current value.
Furthermore, the PLC module is also used for collecting and processing signals such as metal scrap alarm, engine rotating speed Ng, dynamometer torque, fuel flow and the like; and when the metal chip alarm occurs, the rotating speed Ng of the engine or the torque of the dynamometer exceeds the limit, the PLC module controls a fuel cut-off conversion valve on the lubricating oil pipeline to be disconnected, lubricating oil supply is recovered, and the lubricating oil cut-off test is stopped.
On the other hand, the invention also discloses an automatic control method for the aeroengine lubricating oil interruption test, which comprises the following technical scheme,
an automatic control method for an aeroengine oil interruption test, the method comprising the steps of,
the upper computer performs man-machine interaction and sends an operation instruction to the PLC module;
the electronic controller collects the lubricating oil pressure value of the engine, and outputs a lowest lubricating oil pressure signal to the PLC module when the lubricating oil pressure value reaches a lowest limit value;
and the PLC module receives the operation instruction sent by the upper computer and the lowest lubricating oil pressure signal sent by the electronic controller, and the operation instruction and the lowest lubricating oil pressure signal serve as starting basis and control a lubricating oil pipeline to start or interrupt oil supply.
Furthermore, the PLC module controlling the start or stop of the oil supply in the oil line specifically includes,
when the PLC module receives the lowest lubricating oil pressure signal sent by the electronic controller within the time t1, the PLC module controls the lubricating oil pipeline to interrupt oil supply and last for a time t2, and then controls the lubricating oil pipeline to continuously supply oil within the time t3 and carries out periodic circulation;
and when the PLC module does not receive the lowest lubricating oil pressure signal sent by the electronic controller within the duration time t1, the PLC module controls the lubricating oil pipeline to supply oil continuously, and the test is ended.
Furthermore, after the PLC module receives the operation command sent by the upper computer and starts the test, the PLC module performs timing by using a timer T0 and a timer T1, wherein the timing by using the timer T0 and the timer T1 specifically includes,
the timer T0 sends a timing signal of the timer T0 to the PLC module after timing T1;
if the PLC module receives the lowest oil pressure signal sent by the electronic controller within the time T1, the timer T1 starts to count time and lasts for a time T2, and a timing signal of the timer T1 is sent to the PLC module.
Further, the method may further comprise recording the number of cycles of the oil break test, including,
the PLC module receives a lowest oil pressure signal sent by the electronic controller within the time T1, and after the timer T1 starts timing and lasts for the time T2, the PLC module triggers a counter and enables the counting number of the counter to be increased by 1;
and when the PLC module does not receive the lowest oil pressure signal sent by the electronic controller within the time t1, triggering the counter and enabling the counter to stop counting.
Further, the method may further comprise recording a cumulative time of the oil interruption process, including in particular,
the timer T2 records the electrifying time of the oil-cut switching valve in the lubricating oil pipeline;
the timer T2 starts to time every time the oil-cut switching valve is electrified;
the de-energizing of the fuel cut-off switch valve stops the timer T2 and maintains its current value.
Furthermore, the method also comprises an automatic interruption protection of the lubricating oil interruption test, specifically comprising,
the PLC module collects and processes signals such as metal scrap alarm, engine rotating speed Ng, dynamometer torque, fuel flow and the like;
and when the metal chip alarm occurs, the rotating speed Ng of the engine or the torque of the dynamometer exceeds the limit, the PLC module controls a fuel cut-off conversion valve on the lubricating oil pipeline to be disconnected, lubricating oil supply is recovered, and the lubricating oil cut-off test is stopped.
The present invention has at least the following advantages,
through the cooperation of electronic controller, host computer and PLC module to through the time-recorder relevant with the PLC module, realized the automatic control to lubricating oil interruption test, the interruption time in the lubricating oil interruption test, the start and the termination of lubricating oil fuel feeding all can realize automatic control, do not need operating personnel to carry out time handle control through the mode of manual regulation, also do not need to carry out the start and the termination of lubricating oil interruption test manually, the testing process is more accurate, and test efficiency also obtains improving.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic diagram of an engine oil break test principle;
FIG. 2 shows a lubricating oil off-cycle test spectrum;
fig. 3 is a schematic diagram of an automatic control system in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Referring to fig. 2, in the oil break test, 5 oil breaks at intervals of 30 seconds were required, and each oil break was performed for 5 seconds. And the interruption timing is started when the trigger electronic controller shows the 'lowest lubricating oil pressure' mark, and if the 'lowest lubricating oil pressure' mark does not appear within 3 seconds in the lubricating oil interruption period, the oil supply is immediately resumed, and the lubricating oil interruption test is terminated. In fig. 2, at each switch-on of the atmosphere, the pressure was reduced, the oil was interrupted for 5 seconds, after which the supply pressure was resumed to rise for 30 seconds, completing one cycle of the oil interruption test.
Referring to fig. 3, the embodiment of the application discloses an automatic control system for an aeroengine lubricating oil interruption test, which comprises a power supply, an upper computer, an electronic controller, a PLC module, a timer and a counter. The power supply is a 24V direct-current power supply, and is connected with an intermediate relay through a lead, and the intermediate relay is electrically connected with the PLC module and provides electric energy for the control system. The lubricating oil pipeline is provided with an oil-cut-off change-over valve, the oil-cut-off change-over valve is connected with an engine lubricating oil tank through an oil suction connector I and an oil suction connector II, and an intermediate relay is connected with the oil-cut-off change-over valve through a lead to control the power-on or power-off of the oil-cut-off change-over valve, so that the lubricating oil supply and the oil cut-off supply of the lubricating oil pipeline are realized.
The upper computer is used for performing man-machine interaction and sending an operation instruction to the PLC module, and an 'automatic preparation' button and an 'automatic starting' button are arranged in a man-machine interface of the upper computer. The "auto prepare" button is used to make manual/automatic switching. When the button is not pressed down, the automatic test program cannot be started by clicking the 'automatic start', and the 'automatic start' button is used for triggering the lubricating oil to interrupt the automatic test program and switching to an automatic control mode.
The electronic controller and the upper computer are electrically connected with the PLC module and used for signal transmission. The electronic controller is electrically connected with the engine, collects the lubricating oil pressure value of the engine when in work, and outputs a lowest lubricating oil pressure signal to the PLC module when reaching a lowest limit value. The PLC module is used for receiving and processing a lowest lubricating oil pressure signal sent by the electronic controller, serving as a starting and timing basis, receiving an operation instruction sent by the upper computer to start control of an interruption test, and controlling an oil interruption conversion valve on a lubricating oil pipeline to start and stop the lubricating oil interruption test.
The timer comprises a timer T0, a timer T1, a timer T2 and a timer T3, the timer T0, the timer T1 and the timer T3 are used for timing in the process of the lubricating oil interruption test and feeding back to the PLC module, so that control is more accurate, and the timer T2 is used for accumulating timing in the process of the lubricating oil interruption test and recording the accumulated time of the lubricating oil interruption test. The counter is used to record the number of cycles of the oil break test.
The embodiment also discloses an automatic control method for the aero-engine lubricating oil interruption test, which specifically comprises the following steps:
step one, starting an automatic start button on the upper computer, entering an automatic control mode, receiving an operation instruction of the upper computer by the PLC module, and starting an automatic control system.
The upper computer has a mistake-proofing function, when the 'automatic preparation' button is not pressed down, the 'automatic start' is clicked, the automatic test program cannot be started, the 'automatic preparation' is used as a precondition for automatic control start in the program, and the automatic test program cannot be started without being pressed down, so that a mistake is prevented. The accuracy of the control system is improved.
And step two, the electronic controller collects the lubricating oil pressure value of the engine, when the lubricating oil pressure value reaches the lowest limit value, the lowest lubricating oil pressure signal is output to the PLC module, and the PLC module receives the lowest lubricating oil pressure signal and carries out analysis processing to serve as the basis for starting and timing.
That is, only after the PLC module received the minimum pressure signal that electronic controller sent, the PLC module just can the executor to the experimental automatic control of lubricating oil interruption, if after the experiment begins, the PLC module has not accepted the minimum pressure signal from electronic controller always, so the PLC module does not start the experimental control of lubricating oil interruption, and the lubricating oil interruption test can not go on automatically.
If the PLC module does not receive the lowest pressure signal from the electronic controller after starting to continue for a period of time in the test process, the PLC module does not control the oil interruption of the oil interruption test any more, the automatic oil supply is resumed, and the test is ended.
And step three, the PLC module starts to control the lubricating oil interruption test after receiving an operation instruction sent by the upper computer, and controls the lubricating oil interruption test according to a received signal of the lowest lubricating oil pressure value collected by the electronic controller.
When the PLC module receives the lowest lubricating oil pressure signal sent by the electronic controller within the time t1, the PLC module controls the lubricating oil pipeline to stop oil supply and last for a time t2, and then controls the lubricating oil pipeline to continuously supply oil within a time t3 to perform periodic circulation. After the oil supply is continued for t3, the PLC module receives the lowest oil pressure signal again in t1 time, and the time interruption in t2 is carried out again, so that the circulation of the oil interruption test is realized.
And the PLC module controls the lubricating oil pipeline to supply oil continuously only after receiving the lowest lubricating oil pressure signal within the designated time.
The PLC module controls the oil supply of the lubricating oil pipeline by controlling an oil-cut conversion valve on the lubricating oil pipeline, when the lubricating oil is required to be cut off, the PLC module controls the oil-cut conversion valve to be powered on and switched to be communicated with the atmosphere at the inlet, and the inlet of the pressurizing level of the lubricating oil pump sucks air and does not supply oil. When oil supply needs to be recovered after oil interruption is finished, the PLC module controls the oil-cut change-over valve to cut off power and switch to an oil supply path, at the moment, the oil pump pressurization level inlet normally sucks in oil, and the system recovers normal oil supply.
In the present embodiment, time t1 is preferably 3 seconds, time t2 is preferably 5 seconds, and time t3 is preferably 30 seconds. A timer is associated with the PLC module, time T1 and time T2 being clocked by timer T0 and timer T1, respectively, and time T3 being clocked by timer T3.
That is, the timer T0 times 3 seconds and sends a timing signal of the timer T0 to the PLC module, when the PLC module receives a minimum oil pressure signal sent by the electronic controller within 3 seconds, the PLC module controls the oil lubrication line to interrupt oil supply and controls the timer T1 to start timing for 5 seconds, the timer T1 sends a timing signal thereof to the PLC module, the PLC module controls the oil lubrication line to continuously supply oil within 30 seconds, after one cycle is completed, the PLC module receives the minimum oil pressure signal from the electronic controller within 3 seconds of the next cycle, and controls the oil lubrication line again to continuously supply oil to realize cycle.
When the timer T0 counts 3 seconds, the PLC module cannot receive the lowest lubricating oil pressure signal sent by the electronic controller, and then the PLC module controls the lubricating oil pipeline to automatically and continuously supply oil, and the lubricating oil interruption test is ended, namely, the oil supply interruption and interval are not carried out any more, the continuous oil supply is directly returned, and the lubricating oil interruption test is ended.
Through the cooperation of electronic controller, host computer and PLC module to through timer T0, timer T1 with PLC module relevance, realized the automatic control to the lubricating oil interruption test, the interruption time in the lubricating oil interruption test, start and the termination in the test, all can realize automatic control, do not need operating personnel to carry out time handle control through the mode of manual regulation, also do not need to carry out the start and the termination of lubricating oil interruption test manually, the testing process is more accurate, efficiency of software testing also obtains improving.
In addition, the timer T2 is used to count the time during the oil break test to obtain the accumulated time, which is as follows,
the timer T2 records the electrifying time of the oil-cut switching valve in the lubricating oil pipeline; the timer T2 starts to time every time the oil-cut switching valve is electrified; de-energizing the fuel cut-off switch valve stops the timer T2 and maintains its current value.
Because the electrification of the oil-cut-off conversion valve in the lubricating oil pipeline is controlled by the PLC module, when the PLC module controls the lubricating oil cut-off test to be carried out, the oil supply interruption process in the lubricating oil cut-off test is realized when the oil-cut-off conversion valve is electrified every time. When the PLC module controls the oil-cut-off changeover valve to be electrified, the timer T2 is controlled to be started to time, and when the oil-cut-off changeover valve is powered off, the timer T2 is controlled to stop timing, so that the obtained oil-cut-off time is the oil-cut-off time accumulated in the oil-cut-off test.
And step four, recording the cycle number of the lubricating oil interruption test by a counter.
The PLC module receives the lowest oil pressure signal from the electronic controller within 3 seconds, and after the timer T0 begins counting 5 seconds, the PLC module triggers the counter and increments the count of the counter by 1.
And when the PLC module does not receive the lowest lubricating oil pressure signal sent by the electronic controller within 3 seconds, triggering the counter and stopping counting by the counter.
In a lubricating oil interruption test, the PLC module triggers the counter to count once when controlling the oil interruption conversion valve in the lubricating oil pipeline to perform lubricating oil interruption each time, and the number of times of circulation of the lubricating oil interruption test is counted after circulation.
The PLC module can also acquire signals such as metal scrap alarm, engine rotating speed Ng, dynamometer torque, fuel flow and the like. The metal scrap alarm is sent to the PLC module by the electronic controller, the engine rotating speed Ng and the fuel flow are sent by a test system related to the test, and the dynamometer torque is sent by the dynamometer. The PLC module processes data in real time, when metal chip alarming occurs, the rotating speed Ng of an engine or the torque of a dynamometer exceeds the limit, an instruction is sent to cut off the oil-cut conversion valve so that the oil-cut conversion valve is powered off, oil supply of lubricating oil is recovered, the lubricating oil cut-off test is stopped, and then an operator pulls down a load lever or stops the vehicle according to the situation to check a test system. The automatic interruption protection of the lubricating oil interruption test is realized, and the safety of the test process is ensured.
Still set up "reset" button on the host computer, after "reset" button starts, send signal to PLC module, PLC module clears the count of counter, clears the numerical value of timer T2 simultaneously for initial condition is got back to in the count of accumulative timing and lubricating oil interruption test, conveniently carries out the test next time.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. An automatic control system for an aircraft engine oil interruption test, characterized in that the system comprises,
the upper computer is used for performing man-machine interaction and sending an operation instruction to the PLC module;
the electronic controller is used for acquiring the lubricating oil pressure value of the engine and outputting a lowest lubricating oil pressure signal to the PLC module when the lubricating oil pressure value reaches a lowest limit value;
and the PLC module is used for receiving the operation instruction sent by the upper computer and the lowest lubricating oil pressure signal sent by the electronic controller, and controlling the lubricating oil pipeline to start or interrupt oil supply by taking the operation instruction and the lowest lubricating oil pressure signal as starting basis.
2. The automatic control system for the aero-engine oil interruption test according to claim 1, wherein the PLC module controls the start or interruption of oil supply to the oil line specifically comprises,
if the lowest lubricating oil pressure signal sent by the electronic controller is received within the time t1, the PLC module is used for controlling the lubricating oil pipeline to interrupt oil supply and last for a time t2, and then controlling the lubricating oil pipeline to continuously supply oil within a time t3 and performing periodic circulation;
and if the lowest lubricating oil pressure signal sent by the electronic controller is not received within the time t1, the PLC module is used for controlling the lubricating oil pipeline to supply oil continuously, and the test is terminated.
3. The automatic control system for an aircraft engine oil interruption test according to claim 1, wherein the system further comprises a timer T0 and a timer T1 for sending timing signals to the PLC module, the timer T0 and the timer T1 sending timing signals to the PLC module specifically comprises,
the timer T0 sends a timing signal of the timer T0 to the PLC module after timing T1, if the PLC module receives a lowest lubricating oil pressure signal sent by the electronic controller within a time T1, the timer T1 starts timing and lasts for a time T2, and sends a timing signal of the timer T1 to the PLC module.
4. An automatic control system for an aircraft engine oil interruption test, according to claim 3, characterized in that said system further comprises a counter for recording the number of cycles of the oil interruption test,
the counter recording the number of cycles of the lubricant break test specifically includes,
when the PLC module receives the lowest oil pressure signal sent by the electronic controller within the time T1 and the timer T1 keeps timing T2, triggering the counter and enabling the counter T0 to count times and add 1;
when the PLC module does not receive the lowest oil pressure signal sent by the electronic controller within the time t1, the counter is triggered and stops counting.
5. The automatic control system for the oil break test of the aircraft engine according to claim 1 or 2, characterized in that the oil break changeover valve is arranged on the oil line, the system further comprises a timer T2, the timer T2 is used for recording the accumulated time of the oil break test, in particular comprising,
the timer T2 records the power-on time of the fuel-cut switching valve on the lubricating oil pipeline;
the timer T2 starts to time every time the oil-cut switching valve is electrified;
the de-energizing of the fuel cut-off switch valve stops the timer T2 and maintains its current value.
6. The automatic control system for the aero-engine oil interruption test is characterized in that the PLC module is further used for collecting and processing signals such as metal chip alarm, engine speed Ng, dynamometer torque and fuel flow; and when the metal chip alarm occurs, the rotating speed Ng of the engine and the torque of the dynamometer exceeds the limit, the PLC module controls a fuel cut-off conversion valve on the lubricating oil pipeline to be disconnected, lubricating oil supply is recovered, and the lubricating oil cut-off test is stopped.
7. An automatic control method for an aeroengine oil interruption test, characterized in that the method comprises the following steps,
the upper computer performs man-machine interaction and sends an operation instruction to the PLC module;
the electronic controller collects the lubricating oil pressure value of the engine, and outputs a lowest lubricating oil pressure signal to the PLC module when the lubricating oil pressure value reaches a lowest limit value;
and the PLC module receives the operation instruction sent by the upper computer and the lowest lubricating oil pressure signal sent by the electronic controller, and the operating instruction and the lowest lubricating oil pressure signal serve as starting basis to control the lubricating oil pipeline to start or interrupt oil supply.
8. The automatic control method for the aeroengine oil interruption test according to claim 7, wherein the PLC module controls the start or interruption of oil supply of the oil pipeline specifically comprises,
when the PLC module receives the lowest lubricating oil pressure signal sent by the electronic controller within the time t1, the PLC module controls the lubricating oil pipeline to interrupt oil supply and last for a time t2, and then controls the lubricating oil pipeline to continuously supply oil within the time t3 and carries out periodic circulation;
and when the PLC module does not receive the lowest lubricating oil pressure signal sent by the electronic controller within the duration time t1, the PLC module controls the lubricating oil pipeline to supply oil continuously, and the test is ended.
9. The automatic control method for the aeroengine oil interruption test according to claim 7, wherein after the PLC module receives the operation command sent by the upper computer and starts the test, the PLC module performs timing by a timer T0 and a timer T1, and the timing by the timer T0 and the timer T1 specifically comprises,
the timer T0 sends a timing signal of the timer T0 to the PLC module after timing T1;
if the PLC module receives the lowest oil pressure signal sent by the electronic controller within the time T1, the timer T1 starts to count time and lasts for a time T2, and a timing signal of the timer T1 is sent to the PLC module.
10. The automatic control method for an aircraft engine oil interruption test according to claim 9, characterized in that the method further comprises recording the number of cycles of the oil interruption test, in particular comprising,
the PLC module receives a lowest oil pressure signal sent by the electronic controller within the time T1, and after the timer T1 starts timing and lasts for the time T2, the PLC module triggers a counter and enables the counting number of the counter to be increased by 1;
and when the PLC module does not receive the lowest oil pressure signal sent by the electronic controller within the time t1, triggering the counter and enabling the counter to stop counting.
11. The automatic control method for an aircraft engine oil interruption test according to claim 7 or 8, characterized in that the method further comprises recording the cumulative time of the oil interruption process, in particular comprising,
the timer T2 records the electrifying time of the oil-cut switching valve in the lubricating oil pipeline;
the timer T2 starts to time every time the oil-cut switching valve is electrified;
the de-energizing of the fuel cut-off switch valve stops the timer T2 and maintains its current value.
12. The automatic control method for an aircraft engine oil interruption test according to claim 1, characterized in that the method further comprises an automatic interruption protection of the oil interruption test, in particular comprising,
the PLC module collects and processes signals such as metal scrap alarm, engine rotating speed Ng, dynamometer torque, fuel flow and the like;
and when the metal chip alarm occurs, the rotating speed Ng of the engine or the torque of the dynamometer exceeds the limit, the PLC module controls a fuel cut-off conversion valve on the lubricating oil pipeline to be disconnected, lubricating oil supply is recovered, and the lubricating oil cut-off test is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110972742.0A CN113721539B (en) | 2021-08-24 | 2021-08-24 | Automatic control system and method for aeroengine lubricating oil interruption test |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758646A (en) * | 2016-03-01 | 2016-07-13 | 西安航空动力股份有限公司 | Test device and test method for lubricating oil cut-off of aero-engine afterburner fuel regulator |
| CN106124219A (en) * | 2016-05-31 | 2016-11-16 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of assay device verifying oil pump function of having no progeny in lubricating oil and verification method |
| US20200039016A1 (en) * | 2018-08-02 | 2020-02-06 | Unist, Inc. | Minimum quantity lubrication system and method |
| CN113109052A (en) * | 2021-04-12 | 2021-07-13 | 芜湖钻石航空发动机有限公司 | Aeroengine fuel cut-off test device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758646A (en) * | 2016-03-01 | 2016-07-13 | 西安航空动力股份有限公司 | Test device and test method for lubricating oil cut-off of aero-engine afterburner fuel regulator |
| CN106124219A (en) * | 2016-05-31 | 2016-11-16 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of assay device verifying oil pump function of having no progeny in lubricating oil and verification method |
| US20200039016A1 (en) * | 2018-08-02 | 2020-02-06 | Unist, Inc. | Minimum quantity lubrication system and method |
| CN113109052A (en) * | 2021-04-12 | 2021-07-13 | 芜湖钻石航空发动机有限公司 | Aeroengine fuel cut-off test device |
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