CN113586695B - Switching control method of main oil pump and auxiliary oil pump - Google Patents
Switching control method of main oil pump and auxiliary oil pump Download PDFInfo
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- CN113586695B CN113586695B CN202010362267.0A CN202010362267A CN113586695B CN 113586695 B CN113586695 B CN 113586695B CN 202010362267 A CN202010362267 A CN 202010362267A CN 113586695 B CN113586695 B CN 113586695B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0436—Pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0441—Arrangements of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0442—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control for supply in case of failure, i.e. auxiliary supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0446—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control the supply forming part of the transmission control unit, e.g. for automatic transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses a switching control method of a main oil pump and an auxiliary oil pump, which comprises the following steps: when the host computer starts, control module implements supplementary oil pump and switches the main oil pump process, and supplementary oil pump switches the main oil pump process and includes: an oil pressure threshold value and a first holding time T1 are preset in a control module, the control module starts a host machine and a main oil pump and continuously detects the oil pressure of a system, timing is started from the start of the main oil pump, the control module compares the oil pressure of the system with the preset oil pressure threshold value within the first holding time T1, if the oil pressure of the system exceeds the oil pressure threshold value, the control module controls an auxiliary oil pump to stop running, if the oil pressure of the system does not exceed the oil pressure threshold value, an abnormal processing process is started by the host machine, and after the abnormal processing process is completed, the auxiliary oil pump stops running; the control module intermittently tests the auxiliary oil pump; the control module controls the process of switching the auxiliary oil pump from the main oil pump. The method avoids the main engine lubricating oil supply interruption danger caused by the simultaneous stop of the two oil pumps.
Description
Technical Field
The invention relates to an oil pump control method, in particular to a switching control method of a main oil pump and an auxiliary oil pump.
Background
The lubricating oil supply system is an important component for any mechanical equipment, once the system fails to supply the lubricating oil, the main equipment is easy to have major failure, the economic loss is large, the recovery time is slow, and the consequence is very serious.
Referring to fig. 1, fig. 1 is a structural diagram of a rotary compressor unit and a lubrication system in a large steel plant, where the structural diagram includes a main engine 1, a main oil pump 2, an auxiliary oil pump 3, and an oil tank 4, the oil tank 4 supplies lubricating oil to the main oil pump and the auxiliary oil pump, the main oil pump 2 is in driving connection with a motor in the main engine 1, that is, the main oil pump 2 is driven by the main engine 1, a dotted line indicated by an arrow a in the figure indicates an oil supply pipeline for the lubricating oil, and a mechanical part in the main engine 1 is indicated by an arrow B in the figure.
The existing control method of the main oil pump 2 and the auxiliary oil pump 3 is as follows: under the normal condition, when host computer 1 is in the stall state, supplementary oil pump 3 moves, thereby guarantee the lubricated oil supply of host computer 1, when host computer 1 starts the operation, main oil pump 2 moves along with host computer 1, thereby for host computer 1 fuel feeding, after main oil pump 2 moves and keeps certain delay time, supplementary oil pump 3 stall, if the low warning of oil pressure appears then automatic start supplementary oil pump 3, when host computer 1 parks, 2 rotational speeds of main oil pump descend along with large-scale unit rotational speed, the final low warning of oil pressure then starts supplementary oil pump 3 fuel feeding.
In the actual production process, the control method can not deal with some abnormal conditions of the oil pump, thereby causing serious consequences. For example, when the main unit 1 drives the main oil pump 2 to start and then keeps operating for a certain delay time, the auxiliary oil pump 3 is stopped, and at this time, the main oil pump 2 fails and does not start supplying oil normally, but at this time, the auxiliary oil pump 3 is not operated again because the pump stop signal is not eliminated, so that the main unit 1 operates without supplying lubricating oil, thereby causing a serious loss. Therefore, the existing control method has great hidden danger.
Disclosure of Invention
The invention aims to provide a switching control method of a main oil pump and an auxiliary oil pump, which avoids the danger of main engine lubricating oil supply interruption caused by the simultaneous stop of two oil pumps, ensures the normal operation of a main engine and prevents accidents.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a switching control method of a main oil pump and an auxiliary oil pump is characterized in that a lubricating system of a host comprises the main oil pump, the auxiliary oil pump and a control module, wherein the main oil pump is driven by the host, and the control module controls the main oil pump and the auxiliary oil pump to alternately supply oil to the host; when the main machine is in a stop state, the auxiliary oil pump operates normally to supply oil;
the method comprises the following steps:
step 1, when a host is started, a control module controls and implements the process of switching a main oil pump by an auxiliary oil pump,
the auxiliary oil pump switching main oil pump process comprises the following steps:
step 1.1, presetting an oil pressure threshold value and a first holding time T1 in a control module,
step 1.2, the control module controls the starting host, the main oil pump is started to operate along with the starting of the host, the control module continuously detects the oil pressure of the system,
step 1.3, starting timing from the start of a main oil pump, comparing the detected system oil pressure with a preset oil pressure threshold by a control module within a first holding time T1, if the system oil pressure exceeds the oil pressure threshold, controlling an auxiliary oil pump to stop running by the control module, if the system oil pressure does not exceed the oil pressure threshold, implementing a host start exception handling process, and after the exception handling process is implemented, stopping running of the auxiliary oil pump;
and 3, controlling the process of switching the main oil pump and the auxiliary oil pump by the control module when the host machine is stopped.
Further, in step 2, the control module intermittently tests the auxiliary oil pump, and the method includes:
step 2.1, presetting fourth holding time T4 and test cycle time in a control module;
step 2.2, the control module periodically controls and starts the auxiliary oil pump according to the test cycle time, and the control module continuously detects the oil pressure of the system;
and 2.3, starting timing from the starting of the auxiliary oil pump, comparing the detected system oil pressure with a preset oil pressure threshold by the control module within a fourth holding time T4, controlling the auxiliary oil pump to stop running if the system oil pressure exceeds the oil pressure threshold, implementing a host running exception handling process if the system oil pressure does not exceed the oil pressure threshold, and stopping running of the auxiliary oil pump after the exception handling process is implemented.
Further, the main oil pump switching auxiliary oil pump process includes:
step 3.1, presetting third holding time T3 in the control module;
3.2, controlling the starting of the auxiliary oil pump and continuously detecting the oil pressure of the system by the control module;
and 3.3, starting timing from the starting of the auxiliary oil pump, comparing the detected system oil pressure with a preset oil pressure threshold by the control module within a third holding time T3, if the system oil pressure exceeds the oil pressure threshold, controlling the main engine to stop running by the control module, stopping the main oil pump along with the main engine, if the system oil pressure does not exceed the oil pressure threshold, implementing a main engine shutdown exception handling process, after the exception handling process is implemented, stopping the main engine, and stopping the main oil pump along with the main engine.
Further, the step 1.3, the control module controls the auxiliary oil pump to stop running, and the method comprises the following steps: the control module is preset with a second holding time T2, the control module starts to time when the oil pressure of the system exceeds the oil pressure threshold value, and the control module controls the auxiliary oil pump to stop running when the second holding time T2 is reached.
Further, the host start exception handling process in step 1.3 includes: the control module controls the main oil pump to give an abnormal alarm and keeps the auxiliary oil pump to continue running, and the operator receives the alarm and then manually removes the fault.
Further, the host operation exception handling process in step 2.3 includes: the control module controls the auxiliary oil pump to give an abnormal alarm, and an operator receives the alarm and then manually removes the fault.
Further, the host computer shutdown exception handling process in step 3.3 includes: the control module controls the auxiliary oil pump to give an abnormal alarm and keeps the host machine to continue to operate, the main oil pump continues to operate along with the host machine, and an operator receives the alarm and then manually removes the fault.
Further, the value of the oil pressure threshold is the sum of the system oil pressure when the single oil pump normally operates and H/2, wherein H is the difference value between the system oil pressure when the main oil pump and the auxiliary oil pump normally operate simultaneously and the system oil pressure when the single oil pump normally operates.
Further, the value of the first holding time T1 is 2T, where T is the time required to elapse from the time when the switched oil pump is started to the time when the switched oil pump and the switched oil pump operate together to stabilize the system oil pressure.
Further, the value of the third holding time T3 is 2T, where T is the time required to elapse from the time when the switched oil pump is started to the time when the switched oil pump and the switched oil pump operate together to stabilize the system oil pressure.
In the control method, the process of detecting the oil pressure is added in the process of alternately switching the main oil pump and the auxiliary oil pump, whether the oil pump to be started and replaced normally works is judged through the detection of the oil pressure, if the oil pump does not work normally, the replaced oil pump is kept to continue running, and the replaced oil pump stops running only after the fault of the replaced oil pump is eliminated and the oil pump is normally started, so that the danger of the interruption of the lubricating oil of a main machine caused by the simultaneous stop of the two oil pumps is avoided, the normal running of the main machine is ensured, and accidents are prevented; when the main engine normally operates, the auxiliary oil pump is subjected to intermittent starting test, so that the condition of the auxiliary oil pump can be timely mastered, and the auxiliary oil pump is prevented from being broken down.
Drawings
Fig. 1 is a schematic structural diagram of a main engine and a lubrication system, wherein a dotted line indicated by an arrow a indicates an oil supply line for lubricating oil, and an arrow B indicates a mechanical part of the main engine requiring lubrication;
fig. 2 is a flowchart of a switching control method of the main oil pump and the auxiliary oil pump according to the present invention.
In the figure: 1-a main engine, 2-a main oil pump, 3-an auxiliary oil pump and 4-an oil tank.
Detailed Description
The invention will be further described with reference to the following figures and specific examples:
referring to fig. 1 and 2, the present embodiment provides a switching control method for a main oil pump and an auxiliary oil pump, and in the present embodiment, the method is directed to a lubrication system of a rotary compressor set, as shown in fig. 1, the lubrication system of a main machine 1 of the compressor set includes a main oil pump 2, an auxiliary oil pump 3 and a control module, and an oil tank 4 provides lubricating oil for the main and auxiliary oil pumps; in the present embodiment, the main oil pump 2 is driven by the motor of the main machine 1, that is, when the main machine 1 is started, the main oil pump 2 is started, and when the main machine 1 is shut down, the main oil pump 2 is stopped; the control module controls the main oil pump 2 and the auxiliary oil pump 3 to alternately supply oil to the main engine 1; when the main machine 1 is in a stop state, the auxiliary oil pump 3 operates normally to supply oil;
referring to fig. 2, the method includes:
step 1, when the main engine 1 is started, the control module controls the auxiliary oil pump to switch the main oil pump,
the auxiliary oil pump switching main oil pump process comprises the following steps:
step 1.1, presetting an oil pressure threshold value and a first holding time T1 in a control module,
step 1.2, a control module controls a starting host 1, a main oil pump 2 is started to operate along with the starting of the host, and the control module continuously detects the oil pressure of a system;
step 1.3, starting timing from the starting of the main oil pump 2, and comparing the detected system oil pressure with a preset oil pressure threshold value by a control module within a first holding time T1; if the oil pressure of the system exceeds the oil pressure threshold value, the control module controls the auxiliary oil pump 3 to stop running; if the oil pressure of the system does not exceed the oil pressure threshold, the host computer is started to perform an exception handling process, and the auxiliary oil pump 3 stops running after the exception handling process is completed;
the control module intermittently tests the auxiliary oil pump 3, including:
step 2.1, presetting fourth holding time T4 and test cycle time in a control module;
step 2.2, the control module periodically controls the starting of the auxiliary oil pump 3 according to the test cycle time, and the control module continuously detects the oil pressure of the system;
step 2.3, starting timing from the start of the auxiliary oil pump 3, and comparing the detected system oil pressure with a preset oil pressure threshold value by the control module within a fourth holding time T4; if the oil pressure of the system exceeds the oil pressure threshold value, the control module controls the auxiliary oil pump 3 to stop running; and if the oil pressure of the system does not exceed the oil pressure threshold value, implementing the host operation exception handling process, and stopping the auxiliary oil pump 3 after the exception handling process is implemented.
the main oil pump switching auxiliary oil pump process comprises the following steps:
step 3.1, presetting third holding time T3 in the control module;
3.2, controlling the starting of the auxiliary oil pump 3 and continuously detecting the oil pressure of the system by the control module;
and 3.3, starting the auxiliary oil pump 3 to time, comparing the detected system oil pressure with a preset oil pressure threshold by the control module within a third holding time T3, if the system oil pressure exceeds the oil pressure threshold, controlling the main engine 1 to stop running and the main oil pump 2 to stop running, if the system oil pressure does not exceed the oil pressure threshold, implementing a main engine shutdown exception handling process, and after the exception handling process is implemented, stopping the main engine 1 and the main oil pump 2 to stop running.
Optimally, the control module controls the auxiliary oil pump 3 to stop running in step 1.3, and comprises the following steps: the control module is preset with a second holding time T2, the control module starts timing from the time when the system oil pressure exceeds the oil pressure threshold, when the timing reaches the second holding time T2, the control module controls the auxiliary oil pump 3 to stop running, in addition, if the system oil pressure is lower than the oil pressure threshold in the second holding time T2, the auxiliary oil pump 3 cannot be stopped, and whether the system oil pressure is normal or not needs to be confirmed again before the oil pump is stopped. The effect of presetting a second holding time T2 in a control module keeps a certain delay time in the process of switching two oil pumps, and the purpose is to enable the oil pumps to be switched more smoothly, and the auxiliary oil pump 3 rotates for a certain time more to avoid the possibility of sudden failure after the main oil pump 2 is started for a period of time, because the possibility of failure in the process of starting the main oil pump 2 is the largest, the value range of the second holding time T2 is 30-300 seconds, and the value range is determined according to different equipment requirements.
More specifically, the host initiated exception handling process in step 1.3 includes: the control module controls the main oil pump to send out an abnormal alarm and keeps the auxiliary oil pump 3 to continue running, an operator receives the alarm and then manually removes the fault, the manual fault removal process comprises the steps of receiving the alarm, preliminarily judging the fault of the main oil pump 2 if the oil pressure of the system is unchanged, determining to manually stop the main engine 1 later and keep the auxiliary oil pump 3 running until the main engine 1 stops smoothly, and then further checking the oil pressure detection system, wherein if the detection system normally needs to further check the equipment such as the pump body, the catcher and the pipeline of the main oil pump 2.
More specifically, the host operation exception handling process in step 2.3 includes: control module control sends 3 unusual warnings of auxiliary oil pump, and operating personnel receives artifical troubleshooting after the warning, and the process of artifical troubleshooting includes, receives the warning after, if the system oil pressure does not change then can tentatively judge 3 troubles of auxiliary oil pump, confirms to keep host computer 1 operation later, and the oil pressure detecting system of further inspection again, need further inspection auxiliary oil pump 3 motors, take over hand, oil pump body, condition such as pipeline normally if detecting system.
More specifically, the host down exception handling process in step 3.3 includes: control module control sends 3 unusual warnings of auxiliary oil pump and keeps host computer 1 to continue to operate, main oil pump 2 continues to operate thereupon, the artifical troubleshooting after operating personnel receive the warning, the process of artifical troubleshooting includes, after receiving the warning, if the system oil pressure does not change then can tentatively judge 3 troubles of auxiliary oil pump, confirm and keep host computer 1 to operate afterwards, further inspect the oil pressure detecting system again, need further inspect the condition such as auxiliary oil pump 3 motor, take over, oil pump body, pipeline if detecting system is normal.
In the control method of the embodiment, in the switching process of the main oil pump 2 and the auxiliary oil pump 3, the opening and closing states of the main oil pump and the auxiliary oil pump are not simply switched, but the process of detecting the oil pressure is added in the alternate switching process, whether the oil pump to be started and replaced normally works is judged through the detection of the oil pressure, if the oil pump works abnormally, the replaced oil pump is kept to continue to operate, and after the fault of the replaced oil pump is eliminated and the oil pump is normally started, the replaced oil pump stops operating, so that the danger of the lubricating oil supply interruption of the main machine 1 caused by the simultaneous stop of the two oil pumps is avoided, the normal operation of the main machine 1 is ensured, and the accident is prevented. In addition, in the method of the present embodiment, when the main engine 1 is normally operated, the auxiliary oil pump 3 is also intermittently started, and the oil pressure is also detected to determine whether the operation of the auxiliary oil pump 3 is normal, which can bring about two advantages: on one hand, the condition of the auxiliary oil pump 3 can be timely mastered through the detection, and once the auxiliary oil pump 3 is abnormal, an operator can timely know and process the abnormality; on the other hand, since the electrical and mechanical devices are required to be operated frequently, if the mechanical devices are not operated frequently, the mechanical devices are prone to malfunction due to various reasons such as corrosion, and similarly, the electrical devices are also subjected to abnormal conditions such as damp grounding after being stopped for a long time, and therefore, the auxiliary oil pump 3 is started frequently to find and deal with the malfunction in time. Since the remote control method cannot know the specific cause of the abnormality, the process of processing the abnormal fault is usually performed manually to ensure the safe operation of the host 1.
Optimally, the value of the oil pressure threshold is usually determined according to the system oil pressure when a single oil pump of the main oil pump 2 or the auxiliary oil pump 3 normally operates, and in the present embodiment, the value of the oil pressure threshold is the sum of the system oil pressure when the single oil pump of the main oil pump 2 or the auxiliary oil pump 3 normally operates and H/2, where H is the difference between the system oil pressure when the main oil pump 2 and the auxiliary oil pump 3 normally operate simultaneously and the system oil pressure when the single oil pump normally operates. The value of the oil pressure threshold is the optimal value obtained after multiple tests and actual operation, the judgment is easy to cause inaccurate fault when the value is too small, and false alarm is easy to cause when the value is too large.
Optimally, the test cycle time is typically one month, thereby maximizing the assurance that the spare equipment is normal.
Optimally, the values of the first holding time T1, the second holding time T2, the third holding time T3 and the fourth holding time T4 are generally determined according to the starting time of the oil pump, specifically, in the present embodiment, the value of the first holding time T1 is 2T, where T is the time required to elapse from the starting of the switched oil pump until the switched oil pump and the switched oil pump operate together to stabilize the system oil pressure.
The control method of the invention is not limited to be applied to the lubrication system of the main machine of the compressor, and can also be applied to the lubrication systems of other main machines.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A switching control method of a main oil pump and an auxiliary oil pump is characterized in that a lubricating system of a host comprises the main oil pump, the auxiliary oil pump and a control module, wherein the main oil pump is driven by the host, and the control module controls the main oil pump and the auxiliary oil pump to alternately supply oil to the host; when the main machine is in a stop state, the auxiliary oil pump operates normally to supply oil;
the method is characterized in that: the method comprises the following steps:
step 1, when a host is started, a control module controls and implements the process of switching a main oil pump by an auxiliary oil pump,
the auxiliary oil pump switching main oil pump process comprises the following steps:
step 1.1, presetting an oil pressure threshold value and a first holding time T1 in a control module,
step 1.2, the control module controls the starting host machine, the main oil pump is started to operate along with the starting of the host machine, the control module continuously detects the oil pressure of the system,
step 1.3, starting timing from the start of a main oil pump, comparing the detected system oil pressure with a preset oil pressure threshold by a control module within a first holding time T1, if the system oil pressure exceeds the oil pressure threshold, controlling an auxiliary oil pump to stop running by the control module, if the system oil pressure does not exceed the oil pressure threshold, implementing a host start exception handling process, and after the exception handling process is implemented, stopping running of the auxiliary oil pump;
step 2, when the host machine operates normally, the control module intermittently tests the auxiliary oil pump;
the control module intermittently tests the auxiliary oil pump, including:
step 2.1, presetting fourth holding time T4 and test cycle time in a control module;
step 2.2, the control module periodically controls and starts the auxiliary oil pump according to the test cycle time, and the control module continuously detects the oil pressure of the system;
step 2.3, starting timing from the starting of the auxiliary oil pump, comparing the detected system oil pressure with a preset oil pressure threshold value by the control module within a fourth holding time T4, if the system oil pressure exceeds the oil pressure threshold value, controlling the auxiliary oil pump to stop running by the control module, if the system oil pressure does not exceed the oil pressure threshold value, implementing a host operation exception handling process, and after the exception handling process is implemented, stopping running of the auxiliary oil pump;
step 3, when the host machine is stopped, the control module controls the process of implementing the switching of the main oil pump and the auxiliary oil pump;
the main oil pump switching auxiliary oil pump process comprises the following steps:
step 3.1, presetting third holding time T3 in the control module;
3.2, controlling the starting of the auxiliary oil pump and continuously detecting the oil pressure of the system by the control module;
and 3.3, starting timing from the starting of the auxiliary oil pump, comparing the detected system oil pressure with a preset oil pressure threshold by the control module within a third holding time T3, if the system oil pressure exceeds the oil pressure threshold, controlling the main engine to stop running by the control module, stopping the main oil pump along with the main engine, if the system oil pressure does not exceed the oil pressure threshold, implementing a main engine shutdown exception handling process, after the exception handling process is implemented, stopping the main engine, and stopping the main oil pump along with the main engine.
2. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: in step 1.3, the control module controls the auxiliary oil pump to stop running, and the control module comprises: the control module is preset with a second holding time T2, starts timing from the time when the oil pressure of the system exceeds the oil pressure threshold value, and controls the auxiliary oil pump to stop running when the timing reaches the second holding time T2.
3. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: the host starting exception handling process in step 1.3 includes: the control module controls the main oil pump to give an abnormal alarm and keeps the auxiliary oil pump to continue running, and the operator receives the alarm and then removes the fault manually.
4. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: the host operation exception handling process in step 2.3 includes: the control module controls the auxiliary oil pump to send out an abnormal alarm, and an operator receives the alarm and then manually removes the fault.
5. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: the host computer shutdown exception handling process in step 3.3 includes: the control module controls the auxiliary oil pump to give an abnormal alarm and keeps the host machine to continue to operate, the main oil pump continues to operate along with the host machine, and an operator receives the alarm and then manually removes the fault.
6. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: the value of the oil pressure threshold is the sum of the system oil pressure and H/2 when the single oil pump normally operates, wherein H is the difference value between the system oil pressure when the main oil pump and the auxiliary oil pump normally operate simultaneously and the system oil pressure when the single oil pump normally operates.
7. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: the value of the first holding time T1 is 2T, wherein T is the time required to elapse from the time when the switched oil pump is started to the time when the switched oil pump and the switched oil pump run together to cause the oil pressure of the system to be stable.
8. The switching control method of the main oil pump and the auxiliary oil pump according to claim 1, characterized in that: the value of the third holding time T3 is 2T, where T is the time required to elapse from the time when the switched oil pump is started to the time when the switched oil pump and the switched oil pump operate together to stabilize the system oil pressure.
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| CN202010362267.0A CN113586695B (en) | 2020-04-30 | 2020-04-30 | Switching control method of main oil pump and auxiliary oil pump |
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| JPH0566285U (en) * | 1991-10-14 | 1993-09-03 | 株式会社東芝 | Oil pump hydraulic oil confirmation device |
| CN202789466U (en) * | 2012-08-22 | 2013-03-13 | 常州亚邦化学有限公司 | High-pressure oil pump interlocking circuit |
| CN105909961A (en) * | 2016-06-24 | 2016-08-31 | 江苏江海润液设备有限公司 | Lubricating system with multiple emergency functions and controlling method thereof |
| CN206863557U (en) * | 2017-06-02 | 2018-01-09 | 华电湖北发电有限公司黄石热电厂 | A kind of alternating current-direct current oil pump linkage control system |
| CN208169102U (en) * | 2018-05-22 | 2018-11-30 | 邯郸钢铁集团有限责任公司 | A kind of full-automatic oil pump switching electric-control system |
| CN109340549A (en) * | 2018-08-24 | 2019-02-15 | 四川川润液压润滑设备有限公司 | A kind of control method that lubricating system oil pump fault judges automatically and switches |
| CN110474595A (en) * | 2019-08-16 | 2019-11-19 | 西安陕鼓动力股份有限公司 | A kind of air blower main oil pump control switching circuit and booting, method for handover control |
| CN110685952B (en) * | 2019-09-26 | 2021-11-26 | 沈阳鼓风机集团安装检修配件有限公司 | Lubricating oil system and instability adjusting method of compressor |
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2020
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