CN110792523A - Engine oil seal control system and method based on PLC - Google Patents
Engine oil seal control system and method based on PLC Download PDFInfo
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- CN110792523A CN110792523A CN201911112345.5A CN201911112345A CN110792523A CN 110792523 A CN110792523 A CN 110792523A CN 201911112345 A CN201911112345 A CN 201911112345A CN 110792523 A CN110792523 A CN 110792523A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The system comprises a PLC component, a starting switch, a starting detection device, an analog quantity conversion device and a starter component; the PLC component is respectively connected with the starting switch, the starting detection device, the analog quantity conversion device, the starter component and the engine; the starter assembly is also connected with the engine and used for driving the engine; the analog quantity conversion device is also connected with the engine and starter assembly and is used for converting the rotating speed signals of the engine and the starter into voltage signals; the starting detection device is also connected with the starting switch and is used for detecting whether a starting signal of the starting switch is effective or not. The system has simple structure and low manufacturing cost, can adopt different starting modes aiming at different engines, ensures the starting safety, injects lubricating oil for oil sealing after detecting the stable rotating speed of the engine, and ensures the stability and the quality of the oil seal.
Description
Technical Field
The invention relates to the field of engines, in particular to an engine oil seal control system and method based on a PLC.
Background
In the process of external field service, the aero-engine can exist in a storehouse for a long time, the longest oil sealing period of the external field is 2 years, under the condition that fuel oil exists in an engine fuel oil system, the aero-engine can be stored for only one week in the ground state, so that oil sealing is frequently required to be carried out on the ground, and therefore a ground oil sealing device is developed, and the ground oil sealing device is required to control starting of the aero-engine and control on and off of an electromagnetic valve so as to fill lubricating oil into an oil pipe, a casing and the like of the aero-engine to complete oil sealing of the aero-engine.
However, the existing ground oil seal device mainly adopts an imported aircraft engine controller, and often one oil seal device is manufactured based on one engine controller, the adopted materials are expensive, and various adaptability tests such as smoke, electromagnetic compatibility and the like need to be carried out on the controller in the manufacturing process. Therefore, the existing ground oil seal device not only has complex structure, high cost, long manufacturing period, but also has smaller application range.
Disclosure of Invention
The invention provides an engine oil seal control system based on a PLC (programmable logic controller) for solving the technical problem.
The technical scheme for solving the technical problems is as follows: an engine oil seal control system based on a PLC comprises a PLC component, a starting switch, a starting detection device, an analog quantity conversion device and a starter component.
The PLC component is respectively connected with the starting switch, the starting detection device, the analog quantity conversion device, the starter component and the engine.
The starter assembly is further connected with the engine and used for driving the engine.
The analog quantity conversion device is also connected with the engine and used for converting the rotating speed signal of the engine into a voltage signal.
The starting detection device is also connected with the starting switch and used for detecting a starting signal of the starting switch.
The PLC component is used for controlling the starting of the engine or the starter component according to the starting signal and oil sealing the engine according to the voltage signal.
The invention has the advantages that the engine oil seal control system is formed by the PLC component, the starting switch, the starting detection device, the analog quantity conversion device and the starter component, and the system has simple structure and low manufacturing cost. The PLC component is respectively connected with the starting switch, the starting detection device, the analog quantity conversion device, the starter component and the engine. The starter assembly is further connected with the engine and used for driving the engine. The analog quantity conversion device is also connected with the engine and used for converting the rotating speed signal of the engine into a voltage signal. The starting detection device is also connected with the starting switch and used for detecting whether a starting signal of the starting switch is effective or not. When the starting detection device works, whether the starting signal of the starting switch is started effectively is detected firstly, for example, whether the pressing time of the starting button exceeds 1 second, and if the pressing time exceeds 1 second, the starting signal is effective, so that the false starting of the system is avoided, and the safety of the system is ensured. And when the specification of the engine is smaller, the engine can be directly started under the control of the PLC component, after the engine is started, the rotating speed of the engine is fed back to the PLC component in real time by the analog quantity conversion device, and when the rotating speed is stable, lubricating oil is injected to carry out oil sealing, so that the stability of the oil sealing process is ensured. When the specification of the engine is larger, the starter assembly can be started to drive the engine so as to ensure that the engine can be started stably, and then the same oil sealing process is carried out. Therefore, the oil seal control system can be suitable for engines of different specifications to finish oil sealing, and has a wide application range.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the PLC assembly includes:
and the PLC input device is used for receiving the starting signal and the voltage signal and inputting the starting signal and the voltage signal to the PLC processor.
And the PLC processor is used for generating a corresponding control instruction according to the detection signal, the starting signal and the voltage signal.
A PLC output device for outputting the control command to the engine and the starter assembly.
And the power supply device is used for supplying power to the PLC processor.
The PLC processor is respectively connected with the PLC input device, the PLC output device, the power supply device and the analog quantity conversion device.
The PLC input device is respectively connected with the starting switch and the starting detection device.
The PLC output device is respectively connected with the engine and the starter assembly.
Further, the starting switch is a starting button, the starting detection device is a pressure sensor, and the pressure sensor is arranged below the starting button and used for detecting whether the starting button is pressed down or not.
The starting button is used as the starting switch, the pressure sensor is used as the starting detection device, and when the starting signal of the starting switch is detected to be effective, the pressure sensor is only used for detecting whether the starting button is pressed down, so that the detection is accurate, the response is quick, and the cost of the starting button and the cost of the pressure sensor are low.
Furthermore, the control system also comprises a digital display meter, and the digital display meter is connected with the PLC component.
The beneficial effect of adopting above-mentioned further scheme is that can show the engine speed through connecting digital display table, can know the rotational speed information of engine directly perceived, in real time.
The invention also provides an engine oil seal control method based on PLC, which is applied to the engine oil seal control system based on PLC and comprises the following steps:
and starting the starting switch, detecting whether the starting time of the starting switch exceeds a preset first time by the starting detection device, and controlling the engine to start by the PLC control component if the starting time of the starting switch exceeds the preset first time.
When the starting of the engine is detected, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, a first stable rotating speed is obtained after the rotating speed is stable, the PLC control assembly judges whether the first stable rotating speed is larger than or equal to 35% of the rated rotating speed of the engine, and if yes, oil is injected into the engine and oil sealing is completed after the oil sealing is continuously performed for a preset second time.
When the starting of the engine is not detected, the PLC control assembly controls the starting of the starter assembly to drive the engine to start, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, a second stable rotating speed is obtained after the rotating speed is stable, the PLC control assembly judges whether the second stable rotating speed is larger than or equal to 50% of the rated rotating speed of the engine, and if yes, oil is injected into the engine and oil sealing is completed after the third time is continuously preset.
The starting detection device has the advantages that whether the starting switch is started effectively or not is judged by firstly detecting whether the starting time of the starting switch exceeds 1 second or not through the starting detection device, so that the false starting of the system is avoided, and the safety of the system is ensured. After the starting switch is turned on, whether the engine can be started or not is detected, if the engine can be started, oil sealing is carried out, and if the engine cannot be started, the starter is started to drive the engine, so that the engine can be started stably. Meanwhile, when oil sealing is carried out, lubricating oil is injected after the rotating speed of the engine is detected to be stable to a certain value, so that the stability of the oil sealing process is ensured.
Further, the preset first time is 1 +/-0.05 second.
Further, the preset second time is 15 ± 0.05 second.
Further, the preset third time is 50 ± 0.05 second.
Drawings
Fig. 1 is a schematic structural diagram of an engine oil seal control system based on a PLC according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another PLC-based engine oil seal control system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of an engine oil seal control method based on a PLC according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a PLC-based engine oil seal control system, which includes a PLC component, a start switch, a start detection device, an analog conversion device, and a starter component.
The PLC component is respectively connected with the starting switch, the starting detection device, the analog quantity conversion device, the starter component and the engine.
The starter assembly is further connected with the engine and used for driving the engine.
The analog quantity conversion device is also connected with the engine and used for converting the rotating speed signal of the engine into a voltage signal.
The starting detection device is also connected with the starting switch and used for detecting a starting signal of the starting switch.
The PLC component is used for controlling the starting of the engine or the starter component according to the starting signal and oil sealing the engine according to the voltage signal.
The starter assembly specifically comprises a starting motor and an ignition device, the starting motor is in transmission connection with the engine, and the ignition device is respectively connected with the PLC control assembly and the starting motor.
In a practical application scene, the system further comprises an oil seal control panel and a starting switch, wherein the oil seal control panel is used for inputting oil seal control signals, and the starting switch is arranged on the oil seal control panel. When the starting switch is used, a worker turns on the starting switch, the starting detection device detects whether a starting signal of the starting switch is effective or not, for example, whether the starting signal lasts for 1 second or not, if the starting switch is the starting button, whether the time for pressing the starting button exceeds 1 second or not is detected, and if the time is, the starting signal is effective, so that the engine can be started.
When the engine is started, whether the specification of the engine can be directly started or not can be judged firstly, if the specification of the engine is smaller, the engine can be directly started, and if the specification of the engine is larger, the starter can be started firstly, and then the starter drives the engine to start, so that the engine can be started stably.
After the engine is started, the analog quantity conversion device converts a rotating speed signal of the engine into a voltage signal in real time and feeds the voltage signal back to the PLC control assembly, and the PLC control assembly determines that the rotating speed of the engine is stabilized at a certain value and then injects lubricating oil into the engine to seal the engine.
In the present embodiment, the engine is provided with a rotation speed sensor, and the rotation speed information can be directly output, so that the analog conversion device can directly receive the rotation speed information and convert the rotation speed information into the voltage signal.
Wherein, at the oil blanket in-process, staff's accessible oil blanket control panel manual input corresponding oil blanket control signal, PLC control assembly receives this oil blanket control signal after the program that the operation corresponds with oil blanket control signal, and the generation control command sends the relevant equipment that is used for carrying out the oil blanket again with control command in order to control the oil blanket action. Among them, the oil seal device includes a solenoid valve, an oil pump, and the like.
Specifically, the PLC subassembly includes PLC input device, PLC treater, PLC output device and power supply unit, and the PLC treater is connected with PLC input device, PLC output device, power supply unit and analog quantity conversion equipment respectively. The PLC input device is respectively connected with the starting switch and the starting detection device. And the PLC output device is respectively connected with the engine and the starter assembly.
The PLC processor is used for generating a corresponding control instruction according to the detection signal, the starting signal and the voltage signal, and specifically can adopt Mitsubishi Q series Q00J, and the PLC processor has a main function of running an oil sealing program of an engine. The power supply device may employ Q61 p. The control commands comprise control commands for the engine, control commands for the starter, and control commands for devices such as an electromagnetic valve for injecting lubricating oil into the engine.
The PLC input device can adopt QX40, and is mainly used for receiving various functional signals and feedback signals of the engine from an oil seal control panel, wherein the feedback signals comprise engine seal opening/oil seal signals, starter cold running signals and the like.
The analog quantity conversion device can adopt Q68ADV, mainly receives a rotating speed signal from an engine, converts the rotating speed signal into a standard voltage signal (0-5 v) through a special rotating speed conditioning module and transmits the standard voltage signal to the PLC, and the PLC can judge whether the rotating speed of the engine reaches a limit value or not through the signal.
The PLC output device may employ QY40 through which an output to the engine, an ignition coil controlling the starter and the engine, a power supply, a solenoid valve opening the starter and the engine, and fuel and oil supplied to the engine or the starter are supplied.
Optionally, the starting switch is a starting button, the starting detection device is a pressure sensor, and the pressure sensor is arranged below the starting button and used for detecting whether the starting button is pressed down. By using the starting button as the starting switch and the pressure sensor as the starting detection device, when the starting signal of the starting switch is detected to be effective, the pressure sensor is only used for detecting whether the starting button is pressed down, the detection is accurate, the response is quick, and the cost of the starting button and the cost of the pressure sensor are low. The pressure sensor may be MCT-4C.
Optionally, the control system further comprises a digital display meter, and the digital display meter is connected with the PLC component. The rotating speed of the engine can be displayed by connecting a digital display meter, and the rotating speed information of the engine can be intuitively known in real time.
In a specific use of the PLC-based engine oil seal control system of the present embodiment, the PLC controller generates time signals, where τ 1 is (1 ± 0.05) s, τ 2 is (15 ± 0.05) s, and τ 3 is (50 ± 0.05) s. The timing is started by pressing the start button, wherein the timing function is realized by an internal timer of the PLC controller.
The starting detection device detects a starting signal after the starting button is pressed, the PLC judges whether the starting signal exceeds (1 +/-0.05) s, if so, the engine is started, wherein, if the engine specification is too large to start directly, the engine needs to be driven by starting the starter.
When the engine can be directly started, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, after the rotating speed of the engine is stable, the PLC control assembly judges whether the current stable rotating speed is greater than or equal to 35% of the rated rotating speed of the engine, if yes, the PLC control assembly controls the opening and closing of an electromagnetic valve of the engine to alternately enable lubricating oil to enter a fuel system of the engine, and after the lubricating oil (15 +/-0.05) s is injected, the lubricating oil is stopped being injected, and oil sealing of the engine is completed.
When the engine needs to be driven by a starter, the PLC control assembly controls the starter assembly to start so as to drive the engine to start, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, after the rotating speed is stabilized, the PLC control assembly judges whether the current stable rotating speed is greater than or equal to 50% of the rated rotating speed of the engine, if yes, the PLC control assembly controls the opening and closing of an engine electromagnetic valve to alternately realize that lubricating oil enters a fuel system of the engine, and after the lubricating oil (50 +/-0.05) s is injected, the lubricating oil is stopped being injected, and oil sealing of the engine is completed.
In this embodiment, a PLC-based engine oil seal control method is provided, which is applied to the PLC-based engine oil seal control system described above, and includes the following steps:
and starting the starting switch, detecting whether the starting time of the starting switch exceeds a preset first time by the starting detection device, and controlling the engine to start by the PLC control component if the starting time of the starting switch exceeds the preset first time.
When the starting of the engine is detected, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, a first stable rotating speed is obtained after the rotating speed is stable, the PLC control assembly judges whether the first stable rotating speed is larger than or equal to 35% of the rated rotating speed of the engine, and if yes, oil is injected into the engine and oil sealing is completed after the oil sealing is continuously performed for a preset second time.
When the engine is detected not to be started, the PLC control assembly controls the starter assembly to be started so as to drive the engine to be started, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, a second stable rotating speed is obtained after the rotating speed is stable, the PLC control assembly judges whether the second stable rotating speed is larger than or equal to 50% of the rated rotating speed of the engine, and if yes, oil is injected into the engine and oil sealing is completed after the third time is continuously preset.
Wherein, specific oil blanket process does: in the starting period of the starter, the program in the controller ensures that the opening and closing of the electromagnetic valve of the engine alternately realize the oil entering the fuel system, thereby realizing the oil sealing of the engine. After the starting period is finished, the controller controls the fuel of the starter to turn off the electromagnetic valve so as to stop the starter and separate the starter from the engine, so that the filling of lubricating oil into engine fuel system components such as an oil pipe, a receiver and the like of the engine is finished, and the engine which is not used for a long time can be ensured to keep a good state after the filling is finished.
Here, the term "stable rotation speed" means that the rotation speed is maintained constant for a certain period of time after the rotation speed reaches a certain value. Optionally, the preset first time is 1 ± 0.05 second.
Optionally, the preset second time is 15 ± 0.05 second.
Optionally, the preset third time is 50 ± 0.05 seconds.
Optionally, the PLC-based engine oil seal control system further includes a digital display meter connected to the PLC control component, and the method further includes:
and when the rotating speed of the engine is greater than or equal to 5% of the rated rotating speed of the engine, the digital display meter displays the rotating speed of the engine. The display is performed by the digital display meter when the rotating speed of the engine is more than or equal to 5% of the rated rotating speed of the engine, so that the display effectiveness is improved, and the power consumption of the digital display meter can be reduced.
In summary, the engine oil seal control system and method based on the PLC provided in this embodiment determine whether the start switch is activated effectively by first detecting whether the start time of the start switch exceeds 1 second by the start detection device, thereby avoiding false start of the system and ensuring system safety. After the starting switch is turned on, whether the engine can be started or not is detected, if the engine can be started, oil sealing is carried out, and if the engine cannot be started, the starter is started to drive the engine, so that the engine can be started stably. Meanwhile, when oil sealing is carried out, lubricating oil is injected after the rotating speed of the engine is detected to be stable to a certain value, so that the stability of the oil sealing process is ensured. And the whole system can replace the controller of the imported aircraft engine by the PLC control assembly, and the two engine starting modes are mutually used for ensuring the normal oil seal of the aircraft engine, so that the cost of ground oil seal equipment is greatly saved. The system has simple structure, low cost and convenient development, so that the manufacturing period is greatly shortened.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. An engine oil seal control system based on PLC is characterized by comprising a PLC component, a starting switch, a starting detection device, an analog quantity conversion device and a starter component;
the PLC component is respectively connected with the starting switch, the starting detection device, the analog quantity conversion device, the starter component and the engine;
the starter assembly is also connected with the engine and used for driving the engine;
the analog quantity conversion device is also connected with the engine and used for converting a rotating speed signal of the engine into a voltage signal;
the starting detection device is also connected with the starting switch and used for detecting a starting signal of the starting switch;
the PLC component is used for controlling the starting of the engine or the starter component according to the starting signal and oil sealing the engine according to the voltage signal.
2. The PLC-based engine oil seal control system of claim 1, wherein the PLC component comprises:
the PLC input device is used for receiving the starting signal and the voltage signal and inputting the starting signal and the voltage signal to the PLC processor;
the PLC processor is used for generating a corresponding control instruction according to the detection signal, the starting signal and the voltage signal;
a PLC output device for outputting the control command to the engine and the starter assembly;
the PLC processor is respectively connected with the PLC input device, the PLC output device and the analog quantity conversion device;
the PLC input device is respectively connected with the starting switch and the starting detection device;
the PLC output device is respectively connected with the engine and the starter assembly.
3. The PLC-based engine oil seal control system according to claim 2, wherein the start switch is a start button, and the start detection means is a pressure sensor provided below the start button for detecting whether the start button is pressed.
4. The PLC-based engine oil seal control system according to any one of claims 1-3, further comprising a digital display meter connected to the PLC component.
5. An engine oil seal control method based on PLC, which is applied to the engine oil seal control system based on PLC of any one of claims 1-4, and comprises the following steps:
starting a starting switch, detecting whether the starting time of the starting switch exceeds a preset first time by a starting detection device, and controlling the engine to start by a PLC (programmable logic controller) control assembly if the starting time of the starting switch exceeds the preset first time;
when the starting of the engine is detected, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, a first stable rotating speed is obtained after the rotating speed is stable, the PLC control assembly judges whether the first stable rotating speed is larger than or equal to 35% of the rated rotating speed of the engine, if yes, lubricating oil is injected into the engine and oil sealing is completed after the second time is continuously preset;
when the starting of the engine is not detected, the PLC control assembly controls the starting of the starter assembly to drive the engine to start, the analog conversion device sends the rotating speed of the engine to the PLC control assembly in real time, a second stable rotating speed is obtained after the rotating speed is stable, the PLC control assembly judges whether the second stable rotating speed is larger than or equal to 50% of the rated rotating speed of the engine, and if yes, oil is injected into the engine and oil sealing is completed after the third time is continuously preset.
6. The PLC-based engine oil seal control method according to claim 5, wherein the preset first time is 1 ± 0.05 seconds.
7. The PLC-based engine oil seal control method according to claim 6, wherein the preset second time is 15 ± 0.05 seconds.
8. The PLC-based engine oil seal control method according to claim 7, wherein the preset third time is 50 ± 0.05 seconds.
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| CN201911112345.5A CN110792523A (en) | 2019-11-14 | 2019-11-14 | Engine oil seal control system and method based on PLC |
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| CN201911112345.5A CN110792523A (en) | 2019-11-14 | 2019-11-14 | Engine oil seal control system and method based on PLC |
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| US20090133581A1 (en) * | 2007-11-28 | 2009-05-28 | General Electric Company | Vortex air-oil separator system |
| CN102720598A (en) * | 2012-06-25 | 2012-10-10 | 中国南方航空工业(集团)有限公司 | Ground oil sealing device |
| CN106545418A (en) * | 2016-11-25 | 2017-03-29 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of aero-engine band turns the control method of oil sealing |
| US20170320584A1 (en) * | 2016-05-05 | 2017-11-09 | Pratt & Whitney Canada Corp. | Hybrid gas-electric turbine engine |
| CN207333047U (en) * | 2017-09-04 | 2018-05-08 | 中国航发南方工业有限公司 | Oil sealing operation bench |
| CN108362429A (en) * | 2018-02-19 | 2018-08-03 | 张晓瑜 | Passenger getting off car alarm set used for buses |
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2019
- 2019-11-14 CN CN201911112345.5A patent/CN110792523A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090133581A1 (en) * | 2007-11-28 | 2009-05-28 | General Electric Company | Vortex air-oil separator system |
| CN102720598A (en) * | 2012-06-25 | 2012-10-10 | 中国南方航空工业(集团)有限公司 | Ground oil sealing device |
| US20170320584A1 (en) * | 2016-05-05 | 2017-11-09 | Pratt & Whitney Canada Corp. | Hybrid gas-electric turbine engine |
| CN106545418A (en) * | 2016-11-25 | 2017-03-29 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of aero-engine band turns the control method of oil sealing |
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Application publication date: 20200214 |
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