CN112696281A - Control method, device and system for automatic slow turning of large diesel engine - Google Patents
Control method, device and system for automatic slow turning of large diesel engine Download PDFInfo
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- CN112696281A CN112696281A CN202011588893.8A CN202011588893A CN112696281A CN 112696281 A CN112696281 A CN 112696281A CN 202011588893 A CN202011588893 A CN 202011588893A CN 112696281 A CN112696281 A CN 112696281A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000003921 oil Substances 0.000 claims description 53
- 239000010687 lubricating oil Substances 0.000 claims description 29
- 239000000446 fuel Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The invention belongs to the technical field of diesel engines, and particularly relates to a control method, device and system for automatic slow turning of a large diesel engine. The control method for the automatic slow turning of the large diesel engine comprises the following steps: acquiring the current running state of the diesel engine; controlling the starting electromagnetic valve to be opened according to the current running state of the diesel engine as a closed state; and controlling the emergency stop electromagnetic valve to be opened. According to the control method for the automatic slow turning of the large diesel engine, the starting electromagnetic valve is controlled to be opened according to the condition that the current running state of the diesel engine is a closed state; the emergency stop electromagnetic valve is controlled to be opened, the first air pipeline and the oil stopping device are automatically opened by utilizing the starting electromagnetic valve and the emergency stop electromagnetic valve, slow turning automatic control is realized, manual slow turning is not needed, a large amount of time is saved, steps are prevented from being omitted, the service life of the diesel engine can be prolonged, and safety is improved.
Description
Technical Field
The invention belongs to the technical field of diesel engines, and particularly relates to a control method, device and system for automatic slow turning of a large diesel engine.
Background
When a large diesel engine is started for the first time in a day (a two-stroke diesel engine is usually stopped for 30 min), the indicator valve is usually required to be opened and the diesel engine is required to be slowly rotated so as to enable lubricating oil to enter a friction surface, confirm whether water enters a combustion chamber or not (such as water leakage from a cylinder cover to the combustion chamber), and check the flexibility of a moving part of a main engine and the state of a starting system.
The existing marine two-stroke diesel engine can be independently provided with a slow-turning starting system which is controlled by a pneumatic electromagnetic valve, a main starting valve is provided with a slow-turning valve, the main starting valve is closed when the marine two-stroke diesel engine is started, starting air enters a cylinder cover starting valve through a slow-turning valve bypass, and slow turning of the marine diesel engine is realized.
The marine four-stroke diesel engine generally adopts a manual slow turning mode, which comprises the following steps: manually opening all cylinder cover indicator valves; manually turning on an electric lubricating oil pump or a standby pump to lubricate the diesel engine; pressing down an emergency stop button to prevent fuel oil from being sprayed into the cylinder during slow rotation; manually activating an emergency starting valve of a starting system, slowly rotating the diesel engine, releasing the emergency starting valve, and stopping slowly rotating; closing the indicator valve; the emergency stop settings are reset.
The manual slow turning mode not only consumes time and manpower, but also has complex steps, easily omits the steps, and causes damage to the diesel engine and even safety accidents. For example, forgetting to turn on the electric lubricating oil pump or the backup pump may cause abrasion of moving parts such as a bush, or may cause a serious accident by pressing the emergency start valve in a turning state.
At present, a slow turning mode of a large diesel engine is adopted, so that not only is time and labor consumed, but also steps are complex, the steps are easy to omit, the service life of the diesel engine is influenced, and even safety accidents occur.
Disclosure of Invention
The invention aims to at least solve the problems that the conventional slow turning mode of a diesel engine consumes time and labor and is easy to omit steps. The purpose is realized by the following technical scheme:
the invention provides a control method for automatic slow turning of a large diesel engine, wherein the diesel engine is connected with a first air pipeline and a fuel system pipeline, a starting electromagnetic valve is arranged on the first air pipeline, an oil stopping device is arranged on the fuel system pipeline, the control method also comprises a second air pipeline connected with the oil stopping device, and an emergency stopping electromagnetic valve is arranged on the second air pipeline; the method comprises the following steps:
acquiring the current running state of the diesel engine;
controlling the starting electromagnetic valve to be opened according to the current running state of the diesel engine as a closed state; and controlling the emergency stop electromagnetic valve to be opened.
According to the control method for the automatic slow turning of the large diesel engine, the starting electromagnetic valve is controlled to be opened according to the condition that the current running state of the diesel engine is a closed state; the emergency stop electromagnetic valve is controlled to be opened, the first air pipeline and the oil stopping device are automatically opened by utilizing the starting electromagnetic valve and the emergency stop electromagnetic valve, slow turning automatic control is realized, manual slow turning is not needed, a large amount of time is saved, steps are prevented from being omitted, the service life of the diesel engine can be prolonged, and safety is improved.
In addition, the control method for the automatic slow turning of the large diesel engine can also have the following additional technical characteristics:
in some embodiments of the present invention, the method further includes a high-pressure fuel supply and injection unit disposed on a fuel system pipeline, and the controlling the emergency stop solenoid valve to be opened further includes: and controlling the high-pressure oil supply and injection unit to be closed.
In some embodiments of the present invention, before acquiring the current operating state of the diesel engine, the method further includes:
and (5) opening a cylinder cover indicator valve and opening the electric lubricating oil pump.
In some embodiments of the present invention, before the starting of the cylinder cover indicator valve, the method further includes:
obtaining the value of the pressure of lubricating oil in a lubricating pipeline connected with the diesel engine;
and controlling the electric lubricating oil pump to be started according to the fact that the value of the lubricating oil pressure is lower than a first preset pressure value.
In some embodiments of the invention, said controlling said starting solenoid to open; controlling the emergency stop solenoid to open further comprises:
acquiring the opening time of the starting electromagnetic valve and the emergency stop electromagnetic valve;
the starting electromagnetic valve and the emergency stop electromagnetic valve reach the preset time to control the starting electromagnetic valve and the emergency stop electromagnetic valve to be closed;
and the starting electromagnetic valve and the emergency stop electromagnetic valve are kept open when the opening time of the starting electromagnetic valve and the emergency stop electromagnetic valve does not reach the preset time.
In some embodiments of the present invention, before the controlling the starting electromagnetic valve to be opened, the method further includes:
acquiring the current pressure of the first air pipeline;
and controlling the starting electromagnetic valve to be opened according to the condition that the current pressure of the first air pipeline is greater than a second preset pressure value.
In some embodiments of the present invention, before controlling the emergency stop solenoid to be turned on, the method further comprises:
acquiring the current pressure of the second air pipeline;
and controlling the emergency stop electromagnetic valve to be opened according to the condition that the current pressure of the second air pipeline is greater than a third preset pressure value.
In some embodiments of the present invention, before acquiring the current operating state of the diesel engine, the method further includes:
acquiring the current starting state of the diesel engine;
and acquiring the current running state of the diesel engine according to the fact that the current starting state of the diesel engine is a non-starting linkage state.
In another aspect of the present invention, there is provided a control apparatus for automatically slowing down a large diesel engine, the control apparatus being configured to execute the above control method for automatically slowing down a large diesel engine, wherein the apparatus includes: the device comprises an acquisition unit, a starting electromagnetic valve control unit and an oil stopping device control unit, wherein:
the acquisition unit is used for acquiring the current running state of the diesel engine;
the control unit is used for controlling the starting electromagnetic valve to be opened according to the current running state of the diesel engine as a closed state; and controlling the emergency stop electromagnetic valve to be opened.
The invention also provides a control system for the automatic slow turning of the large diesel engine, which comprises a control device for the automatic slow turning of the large diesel engine, wherein the control device is used for controlling the automatic slow turning of the large diesel engine;
the control system further comprises: a controller;
the starting device is connected with a first air pipeline, a starting electromagnetic valve is arranged on the first air pipeline, and the controller controls the starting electromagnetic valve to be opened or closed;
the emergency stop electromagnetic valve is connected with a second air pipeline, an oil stopping device is arranged on the second air pipeline, and the controller controls the oil stopping device to be opened or closed.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a flow chart of a control method for automatic slow turning of a large diesel engine according to an embodiment of the present invention;
FIG. 2 schematically illustrates a schematic diagram of a control system for automatic slow turning of a large diesel engine according to an embodiment of the invention;
fig. 3 schematically shows a logic diagram of a control method for automatic slow turning of a large diesel engine according to an embodiment of the present invention.
1: a diesel engine; 2: a controller; 3: lubricating the pipeline; 4: a first air line; 5: a second air line; 6: a fuel system pipeline; 7: an electric lubricating oil pump; 8: a lubricant pressure sensor; 9: a starting device; 10: a first air pressure sensor; 11: an emergency stop solenoid valve; 12: a second air pressure sensor; 13: an oil cut-off device; 14: a high-pressure oil supply and injection unit; 15: the solenoid valve is activated.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 and fig. 2, the method for controlling automatic slow turning of a large diesel engine in the present embodiment includes the following steps:
s1, acquiring the current running state of the diesel engine 1;
s2, controlling the starting electromagnetic valve 15 to be opened according to the current running state of the diesel engine 1 as a closed state; and controlling the emergency stop electromagnetic valve 11 to be opened.
Specifically, the starting device comprises a first air pipeline 4 connected with the diesel engine 1, wherein a starting device 9 is arranged on the first air pipeline 4, the starting device can be a starting motor or a main starting valve, a starting electromagnetic valve 15 is controlled to be opened, and the starting device 9 is opened by using air in the first air pipeline 4. The emergency stop device comprises a fuel system pipeline 6 connected with the diesel engine 1, wherein an oil stop device 13 is arranged on the fuel system pipeline 6, the oil stop device 13 is connected with the second air pipeline 5, and an emergency stop electromagnetic valve 11 is arranged on the second air pipeline 5. The starting electromagnetic valve 15 connected with the starting device 9 is controlled to be opened, and the emergency stopping electromagnetic valve 11 connected with the oil stopping device 13 is controlled to be opened.
The emergency stop electromagnetic valve 11 is opened by air, the forced oil stop device 13 is triggered by compressed air, the accelerator rack is forced to zero, and oil supply is stopped.
According to the fact that the current running state of the diesel engine 1 is a closed state, a starting electromagnetic valve 15 connected with a starting device 9 is controlled to be opened, an oil stopping device 13 connected with an emergency stopping electromagnetic valve 11 is controlled to be opened, the starting device 9 and the emergency stopping electromagnetic valve 11 are opened by opening the starting electromagnetic valve 15 and the oil stopping device 13, slow turning automatic control is achieved, manual slow turning is not needed, a large amount of time is saved, and steps are prevented from being omitted.
In some embodiments of the present invention, the method further includes a high-pressure fuel supply and injection unit 14 disposed on a fuel system pipeline, and the method further includes the following steps after the emergency stop solenoid valve is controlled to be opened: the high-pressure fuel supply and injection unit 14 is controlled to shut off the non-fuel supply or the non-injection.
The high-pressure oil supply and injection unit 14 includes a high-pressure oil pump or an oil injection solenoid valve, and when the fuel system is a single high-pressure oil pump, the fuel system sends an oil supply stop instruction according to the current operating state of the diesel engine being a closed state, and controls the accelerator pull rod of the speed regulator to return to zero, so that the high-pressure oil pump rack returns to zero to stop supplying oil. And when the fuel system is a high-pressure common rail fuel system, sending a fuel injection stopping instruction, and closing the fuel common rail fuel injection electromagnetic valve to stop fuel injection.
In some embodiments of the present invention, before acquiring the current operation state of the diesel engine 1, the method further includes:
acquiring the current starting state of the diesel engine 1;
and acquiring the current running state of the diesel engine 1 according to the condition that the current starting state of the diesel engine 1 is a non-starting interlocking state.
In some embodiments of the present invention, obtaining the current starting state of the diesel engine 1 further comprises:
acquiring the current opening state of a slow turning instruction;
and acquiring the current starting state of the diesel engine 1 according to the opening state of the slow turning instruction.
Before the current starting state of the diesel engine 1 is obtained, whether a slow turning instruction is started or not needs to be obtained, and if the slow turning instruction is started, the current starting state of the diesel engine 1 is obtained.
In some embodiments of the present invention, before acquiring the current operating state of the diesel engine, the method further includes: and (5) opening a cylinder cover indicator valve and opening the electric lubricating oil pump 7. Compared with a manual oil pump, the automatic starting electric oil pump 7 is more convenient to use. The electric lubricating oil pump 7 is a motor oil pre-supply pump or a motor oil backup pump, and the electric lubricating oil pump 7 is arranged on the lubricating pipeline 3.
In some embodiments of the present invention, before the starting of the cylinder cover indicator valve, the starting of the electric lubricating oil pump 7 further includes:
obtaining the value of the pressure of lubricating oil in a lubricating pipeline 3 connected with the diesel engine;
and controlling the electric lubricating oil pump 7 to be started according to the fact that the value of the lubricating oil pressure is lower than a first preset pressure value.
Specifically, a lubricant pressure sensor 8 is provided on the lubrication line 3 for detecting a pressure value of the lubricant. The pressure in the lubrication pipeline 3 can be monitored by monitoring the pressure of the lubricating oil in the lubrication pipeline 3 and starting the electric lubricating oil pump 7 according to the condition that the pressure of the lubricating oil is smaller than a first preset pressure value, so that the pressure in the lubrication pipeline 3 is monitored.
In some embodiments of the present invention, the controlling the start solenoid valve 15 connected to the start device 9 to be opened, and the controlling the emergency stop solenoid valve 11 connected to the oil stop device 13 to be opened further comprises:
acquiring the opening time of the starting electromagnetic valve 15 and the emergency stop electromagnetic valve 11;
the opening time of the starting electromagnetic valve 15 and the emergency stop electromagnetic valve 11 reaches the preset time to control the starting electromagnetic valve 15 and the emergency stop electromagnetic valve 11 to be closed;
the opening time of the starting solenoid valve 15 and the emergency stop solenoid valve 11 does not reach the preset time, and the starting solenoid valve 15 and the emergency stop solenoid valve 11 are maintained until the preset time is reached.
In some embodiments of the present invention, before controlling the starting electromagnetic valve 15 connected to the starting device 9 to open, the method further comprises:
acquiring the current pressure in the first air pipeline 4;
and controlling the starting electromagnetic valve 15 to be opened according to the condition that the current pressure in the first air pipeline 4 is greater than a second preset pressure value.
In particular, a first air pressure sensor 10 is arranged on the first air line 4 for detecting a current pressure value in the first air line 4. And when the current pressure is smaller than a second preset pressure value, closing the slow turning control device.
In some embodiments of the present invention, before controlling the emergency stop solenoid valve 11 connected to the oil stopping device 13 to open, the method further includes:
acquiring the current pressure of the second air pipeline 5;
and controlling the emergency stop electromagnetic valve 11 to be opened according to the condition that the current pressure in the second air pipeline 5 is greater than a third preset pressure value.
A second air pressure sensor 12 is arranged on the second air line 5, the second air line 5 being connected to an oil shut-off device 13, the second air pressure sensor 12 being used to detect the current pressure of the second air line 5.
In another aspect of the present invention, an apparatus for controlling automatic slow turning of a large diesel engine 1 is further provided, the apparatus for controlling automatic slow turning of a large diesel engine 1 is used for executing the method for controlling automatic slow turning of a large diesel engine 1, wherein the apparatus comprises: an acquisition unit and a control unit, wherein:
an acquisition unit for acquiring a current operation state of the diesel engine 1;
the control unit comprises a starting electromagnetic valve control unit and an emergency stop electromagnetic valve control unit, and the starting electromagnetic valve 15 control unit is used for controlling the starting electromagnetic valve 15 connected with the starting device 9 to be opened according to the current running state of the diesel engine 1 as a closed state; the parking electromagnetic valve control unit is used for controlling the emergency parking electromagnetic valve 11 to be opened according to the current running state of the diesel engine 1 as a closing state.
As shown in the figures, the invention also provides a control system for automatic slow turning of a large diesel engine, which comprises a control device for automatic slow turning of the large diesel engine 1;
the control system further comprises: a controller 2;
the starting device 9 is connected with the first air pipeline 4, a starting electromagnetic valve 15 is arranged on the first air pipeline 4, and the controller 2 controls the starting electromagnetic valve 15 to be opened or closed;
the emergency stop electromagnetic valve 11 is connected with the second air pipeline 5, the second air pipeline 5 is provided with an oil stopping device 13, and the controller 2 controls the emergency stop electromagnetic valve 11 to be opened or closed.
Specifically, the controller 2 is an ECU controller, and compressed air is respectively introduced into the first air pipeline 4 and the second air pipeline 5, and the starting device 9 and the oil stopping device 13 are started by using the compressed air.
The starting device 9 is a part in the original starting system, so that starting air enters a combustion chamber or drives a gear ring to achieve the aim of rotating moving parts such as a crankshaft and the like; the emergency stop electromagnetic valve 11 is also a part of the original safety control system (controller 2), and the accelerator rack is forced to be zero by utilizing compressed air. The control system for automatic slow turning of the large diesel engine changes the slow turning function of the control system for original manual partial operation into automatic slow turning, improves the working efficiency and reduces the misoperation probability.
As shown in fig. 3, in the method for controlling automatic slow turning of a large diesel engine according to the present invention, the main logic of automatic slow turning is as follows:
manually opening all cylinder cover indicator valves;
manually opening a lubricating oil pre-supply pump or a standby pump to lubricate the diesel engine;
the main control logic for automatic slow turning is as follows:
(1) is the "slow turn" button pressed? If yes, turning to the step 2, and if not, ending;
(2) determine if the diesel engine is started in a chain? If yes, go to step 10, if not, go to step 3;
(3) determine whether the diesel engine is in operation? If yes, go to step 10, if not, go to step 4;
(4) is the control air pressure below the alarm value? If yes, go to step 10, if not, go to step 5;
(5) is the starting pressure below the warning value? If yes, go to step 10, if not, go to step 6;
(6) is the lubricating oil pressure lower than the warning value? If yes, go to step 10, if no, go to step 7;
(7) opening an emergency stop electromagnetic valve, triggering an oil stop device by compressed air, and forcibly zeroing an accelerator rack (suitable for a fuel system provided with a single high-pressure oil pump);
opening a starting electromagnetic valve (starting an air starting system), controlling an accelerator pull rod of an electronic speed regulator (suitable for a fuel system configured with a single high-pressure oil pump) to return to zero by sending an oil supply stopping instruction, and realizing that a rack of the high-pressure oil pump returns to zero, or controlling an oil injection electromagnetic valve to be closed by a common rail ECU (suitable for a high-pressure common rail fuel system), namely realizing that a high-pressure oil supply and injection unit stops supplying oil or injecting oil by sending an oil supply stopping or oil injection stopping instruction, or other original control measures which can stop injecting oil on a diesel engine;
the rotating part of the crankshaft starts rotating, and the slow rotation starts;
turning to step 8;
(8) judging whether the slow rotation time reaches a set value, if not, going to step 1, and if so, going to step 8;
(9) and the starting electromagnetic valve is closed,
the emergency stop electromagnetic valve is closed,
canceling the instruction of stopping oil supply or oil injection, and canceling other original control measures which can stop oil injection on the diesel engine;
finishing slow turning;
(10) and displaying 'slow rotation failure'.
The indicator valve is manually closed.
The other mode is as follows: on the basis of the mode, the manual opening of the lubricating oil pre-supply pump or the standby pump is changed into automatic operation, namely, the lubricating oil pressure is monitored, and whether the lubricating oil pre-supply pump or the standby pump needs to be started or not is determined according to the lubricating oil pressure.
In conclusion, in the control method for the automatic slow turning of the large diesel engine, the starting electromagnetic valve is controlled to be opened according to the condition that the current running state of the diesel engine is a closed state; the emergency stop electromagnetic valve is controlled to be opened, the first air pipeline and the oil stopping device are automatically opened by utilizing the starting electromagnetic valve and the emergency stop electromagnetic valve, slow turning automatic control is realized, manual slow turning is not needed, a large amount of time is saved, steps are prevented from being omitted, the service life of the diesel engine can be prolonged, and safety is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A control method for automatic slow turning of a large diesel engine is characterized in that the first air pipeline is provided with a starting electromagnetic valve, the fuel system pipeline is provided with an oil stopping device, the control method further comprises a second air pipeline connected with the oil stopping device, and the second air pipeline is provided with an emergency stopping electromagnetic valve; the method comprises the following steps:
acquiring the current running state of the diesel engine;
controlling the starting electromagnetic valve to be opened according to the current running state of the diesel engine as a closed state; and controlling the emergency stop electromagnetic valve to be opened.
2. The method for controlling the automatic slow turning of the large diesel engine as claimed in claim 1, further comprising a high-pressure oil supply and injection unit arranged on a pipeline of a fuel system, and further comprising the following steps after the emergency stop solenoid valve is opened: and controlling the high-pressure oil supply and injection unit to be closed.
3. The method for controlling automatic slow turning of a large diesel engine according to claim 1, wherein before acquiring the current operation state of the diesel engine, the method further comprises:
and (5) opening a cylinder cover indicator valve and opening the electric lubricating oil pump.
4. The method for controlling automatic slow turning of a large diesel engine according to claim 3, wherein the step of starting the cylinder cover indicator valve and before starting the electric lubricating oil pump further comprises the following steps:
obtaining the value of the pressure of lubricating oil in a lubricating pipeline connected with the diesel engine;
and controlling the electric lubricating oil pump to be started according to the fact that the value of the lubricating oil pressure is lower than a first preset pressure value.
5. The method for controlling automatic slow turning of a large diesel engine according to claim 1,
the starting electromagnetic valve is controlled to be opened; controlling the emergency stop solenoid to open further comprises:
acquiring the opening time of the starting electromagnetic valve and the emergency stop electromagnetic valve;
the starting electromagnetic valve and the emergency stop electromagnetic valve reach the preset time to control the starting electromagnetic valve and the emergency stop electromagnetic valve to be closed;
and the starting electromagnetic valve and the emergency stop electromagnetic valve are kept open when the opening time of the starting electromagnetic valve and the emergency stop electromagnetic valve does not reach the preset time.
6. The method for controlling the automatic slow turning of the large diesel engine according to claim 1, wherein before controlling the starting electromagnetic valve to be opened, the method further comprises the following steps:
acquiring the current pressure of the first air pipeline;
and controlling the starting electromagnetic valve to be opened according to the condition that the current pressure of the first air pipeline is greater than a second preset pressure value.
7. The method for controlling the automatic slow turning of the large diesel engine according to claim 1, wherein before controlling the emergency stop solenoid to be turned on, the method further comprises:
acquiring the current pressure of the second air pipeline;
and controlling the emergency stop electromagnetic valve to be opened according to the condition that the current pressure of the second air pipeline is greater than a third preset pressure value.
8. The method for controlling automatic slow turning of a large diesel engine according to claim 1, wherein before acquiring the current operation state of the diesel engine, the method further comprises:
acquiring the current starting state of the diesel engine;
and acquiring the current running state of the diesel engine according to the fact that the current starting state of the diesel engine is a non-starting linkage state.
9. A large diesel engine automatic slow turning control apparatus for performing the large diesel engine automatic slow turning control method of claim 1, characterized by comprising: the device comprises an acquisition unit, a starting electromagnetic valve control unit and an oil stopping device control unit, wherein:
the acquisition unit is used for acquiring the current running state of the diesel engine;
the control unit is used for controlling the starting electromagnetic valve to be opened according to the current running state of the diesel engine as a closed state; and controlling the emergency stop electromagnetic valve to be opened.
10. A control system for automatic slow turning of a large diesel engine, the control system comprising the control device for automatic slow turning of a large diesel engine according to claim 9;
the control system further comprises: a controller;
the starting device is connected with a first air pipeline, a starting electromagnetic valve is arranged on the first air pipeline, and the controller controls the starting electromagnetic valve to be opened or closed;
the emergency stop electromagnetic valve is connected with a second air pipeline, an oil stopping device is arranged on the second air pipeline, and the controller controls the oil stopping device to be opened or closed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116006335A (en) * | 2023-02-27 | 2023-04-25 | 陕西柴油机重工有限公司 | Diesel engine car blowing system based on compressed air jigger |
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