CN102778847B - Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system - Google Patents
Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system Download PDFInfo
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- CN102778847B CN102778847B CN201210232875.5A CN201210232875A CN102778847B CN 102778847 B CN102778847 B CN 102778847B CN 201210232875 A CN201210232875 A CN 201210232875A CN 102778847 B CN102778847 B CN 102778847B
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Abstract
The invention discloses an automatic shutdown method of an electric motor towing turbine unit in failure of a controlling system and an oil system. A normally opened pressure switch is arranged on a lubricating oil supplying main pipe of the electric motor towing turbine unit, and when the pressure of the lubricating oil is as low as the preset value, the contact of the pressure switch is closed. A pressure switch normally closed contact of the lubricating oil supplying main pipe and a number 1 and number 2 lubricating oil pump motor alternating current contactor normally closed auxiliary contact which are sequentially connected in series are connected into a high-voltage control loop 220-V direct current power supply together with a tripping mechanism of a vacuum breaker to form a safe shutdown control loop. When the safe shutdown control loop is closed, the tripping mechanism of the vacuum breaker in an operation cabinet of the electric motor towing turbine unit is powered on, and the electric towing turbine unit is shut down in interlocking mode. Safe shutdown of the electric towing turbine unit is ensured when the control system and the oil system are failed, and the phenomenon of wrong shutdown caused by wrong operation of the alternating current contactor normally closed auxiliary contact of the pressure switch contact of the lubricating oil supplying main pipe or a lubricating oil pump motor is avoided.
Description
The invention belongs to the control system technical field of motor drag turbine set, relate to the auto stop method of a kind of motor drag turbine set when control system and oil system lost efficacy.
Background technology
Motor drag turbine set routine selects sliding bearing, and sliding bearing needs forced feed lubrication.Therefore, motor drag turbine set must arrange lubricating oil system.The Main Function of lubricating oil system in motor drag turbine set provides the functions such as lubrication, cooling, washing for unit.When lubricating oil system lost efficacy, if unit is still in operation, very easily caused the infringements such as unit bearing bush temperature is too high, the damage of burn-out of bearing, thrust disc, blade wear, machine group rotor time serious, can be caused to wear and tear, hold the major accidents such as cylinder distortion, mechanical driving.Therefore, lubricating oil system failuring delay motor drags the necessary emergency stop of turbine set.
When lubricating oil system lost efficacy; the conventional control methods that motor drag turbine set is shut down is by turbocompressor unit automatic control system Real-Time Monitoring set lubricating oil system pressure condition; when lubricating oil pressure is too low, automatic control system sends shutdown control signal, realizes compressor emergency shutdown.But there are some potential safety hazards in above-mentioned control method.Such as: when the unexpected dead electricity of motor drag turbine set low-tension supply 380V or 220V AC power or other unexpected factors such as robot control system(RCS) power loss or CPU deadlock cause lube oil pump out of service; when causing lubricating oil system fuel feeding manifold pressure too low; if machine unit automatic control system cannot normally work; just there will be lubricating oil system to lose efficacy; unit cannot the dangerous working condition of auto stop immediately, thus causes the generation of security incident.The problems referred to above just at present motor drag turbine set at control system technical elements urgent problem.
Summary of the invention
The defect existed for above-mentioned prior art or deficiency, the object of the invention is to, the auto stop method of a kind of motor drag turbine set when control system and oil system lost efficacy is provided, the method does not rely on machine unit automatic control system, according to put into operation on-site verification, when when control system and oil system lose efficacy, motor drag turbine set guaranteed that unit was automatic, safe shutdown, turn avoid the mistakenly stop machine phenomenon that lubricating oil fuel feeding manifold pressure switch contact or the misoperation of lubricating oil pump motor A.C. contactor normally closed auxiliary contact cause simultaneously, have in time, safety, reliably, without the need to manual operation, do not rely on the advantages such as machine unit automatic control system, it is the standby interlock protection measure that control system and oil system failuring delay motor drag the necessity of the conventional control methods that turbine set is shut down.
For realizing above-mentioned task, the present invention takes following technical solution:
The auto stop method of motor drag turbine set of the present invention when control system and oil system lost efficacy, specifically comprises the steps:
The first step; on motor drag turbine set lubricating oil fuel feeding house steward, distance unit distalmost end arranges a pressure switch open in usual, and according to the requirement of unit actual operating mode, arranges lubricating oil and shut down pressure set points; when lubricating oil pressure is low to moderate this setting value, pressure switch contact closes.
Second step, in the 1# lubricating oil pump motor major loop of motor drag turbine set lubricating oil system, 1# lubricating oil pump motor A.C. contactor is set, make the coils connected in series of this A.C. contactor access 1# lubricating oil pump motor to open, stop in control loop, this A.C. contactor is at least with a normally closed auxiliary contact.
3rd step, in the 2# lubricating oil pump motor major loop of motor drag turbine set lubricating oil system, 2# lubricating oil pump motor A.C. contactor is set, make the coils connected in series of this A.C. contactor access 2# lubricating oil pump motor to open, stop in control loop, this A.C. contactor is at least with a normally closed auxiliary contact.
4th step, in motor drag turbine set high-voltage operation cabinet, arrange vacuum circuit breaker, this vacuum circuit breaker comprises a tripping mechanism.
5th step, after lubricating oil fuel feeding manifold pressure switch normally closed contact, 1# lubricating oil pump motor A.C. contactor normally closed auxiliary contact, 2# lubricating oil pump motor A.C. contactor normally closed auxiliary contact are connected successively, connecting with the tripping mechanism that motor drag turbine set runs cabinet mesohigh vacuum circuit breaker accesses in the 220V direct supply in high voltage control loop, composition safe shutdown control loop; When safe shutdown control loop closes, motor drag turbine set runs vacuum circuit breaker tripping mechanism in cabinet and obtains electric, and vacuum circuit breaker trips, and mair motor power-off, electricity drags unit Concatenate shut-down.
Further, pressure set points shut down by described lubricating oil is 80KPa.
Accompanying drawing explanation
Fig. 1 is the electric loop figure of the auto stop method of motor drag turbine set of the present invention when control system and oil system lost efficacy.
Fig. 2 is the auto stop Method And Principle figure of motor drag turbine set of the present invention when control system and oil system lost efficacy.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Specific implementation method
For the motor drag turbo compressor unit of routine, lubricating oil system arranges two lube oil pump active and standby each other (1# lube oil pumps usually, 2# lube oil pump), namely method of the present invention is comprise 1# lube oil pump, and the motor drag turbo compressor unit of 2# lube oil pump is that object carries out.With reference to Fig. 1, the auto stop method of motor drag turbine set of the present invention when control system and oil system lost efficacy, specifically comprises the steps:
The first step; on motor drag turbine set lubricating oil fuel feeding house steward, distance unit distalmost end arranges a pressure switch open in usual; and according to the requirement of unit actual operating mode; lubricating oil is set and shuts down pressure set points (being generally set to 80KPa); when lubricating oil pressure is low to moderate this setting value, pressure switch contact closes.
Second step, in the 1# lubricating oil pump motor major loop of motor drag turbine set lubricating oil system, 1# lubricating oil pump motor A.C. contactor is set, make the coils connected in series of this A.C. contactor access 1# lubricating oil pump motor to open, stop in control loop, this A.C. contactor is at least with a normally closed auxiliary contact.
3rd step, in the 2# lubricating oil pump motor major loop of motor drag turbine set lubricating oil system, 2# lubricating oil pump motor A.C. contactor is set, make the coils connected in series of this A.C. contactor access 2# lubricating oil pump motor to open, stop in control loop, this A.C. contactor is at least with a normally closed auxiliary contact.
4th step, in motor drag turbine set high-voltage operation cabinet, arrange vacuum circuit breaker, this vacuum circuit breaker comprises a tripping mechanism.
5th step, after lubricating oil fuel feeding manifold pressure switch normally closed contact, 1# lubricating oil pump motor A.C. contactor normally closed auxiliary contact, 2# lubricating oil pump motor A.C. contactor normally closed auxiliary contact are connected successively, connecting with the tripping mechanism that motor drag turbine set runs vacuum circuit breaker in cabinet accesses in the 220V direct supply in high voltage control loop, composition safe shutdown control loop; When safe shutdown control loop closes, motor drag turbine set runs vacuum circuit breaker tripping mechanism in cabinet and obtains electric, and vacuum circuit breaker trips, and mair motor power-off, electricity drags unit Concatenate shut-down.
As shown in Figure 2, the Concatenate shut-down principle of method of the present invention is: when 1# lubricating oil pump motor, 2# lubricating oil pump motor are all out of service, the normally closed auxiliary contact of 1# lubricating oil pump motor A.C. contactor and 2# lubricating oil pump motor A.C. contactor is all closed; Meanwhile; lubricating oil fuel feeding manifold pressure reduces gradually; when lubricating oil main's pressure is low to moderate lubricating oil fuel feeding manifold pressure switch setting value 80KPa; the upper pressure switch normally closed contact open in usual arranged of lubricating oil fuel feeding house steward closes; make the tripping mechanism in unit operation cabinet vacuum circuit breaker charged; vacuum circuit breaker trips, mair motor power-off, unit Concatenate shut-down.
Present invention achieves the unit automatic interlock of motor drag turbine set when control system and oil system lost efficacy to shut down, is conventional control methods necessity, the reliable standby interlock protection measure that motor drag turbine set is shut down.
Claims (1)
1. the auto stop method of motor drag turbine set when control system and oil system lost efficacy, is characterized in that, specifically comprise the steps:
The first step, on motor drag turbine set lubricating oil fuel feeding house steward, distance unit distalmost end arranges a pressure switch open in usual, and according to the requirement of unit actual operating mode, arranges lubricating oil and shut down pressure set points, when lubricating oil pressure is low to moderate this setting value, pressure switch contact closes; Pressure set points shut down by described lubricating oil is 80KPa;
Second step, in the 1# lubricating oil pump motor major loop of motor drag turbine set lubricating oil system, 1# lubricating oil pump motor A.C. contactor is set, make the coils connected in series of this A.C. contactor access 1# lubricating oil pump motor to open, stop in control loop, this A.C. contactor is at least with a normally closed auxiliary contact;
3rd step, in the 2# lubricating oil pump motor major loop of motor drag turbine set lubricating oil system, 2# lubricating oil pump motor A.C. contactor is set, make the coils connected in series of this A.C. contactor access 2# lubricating oil pump motor to open, stop in control loop, this A.C. contactor is at least with a normally closed auxiliary contact;
4th step, in motor drag turbine set high-voltage operation cabinet, arrange vacuum circuit breaker, this vacuum circuit breaker comprises a tripping mechanism;
5th step, after the normally closed contact of the pressure switch open in usual on lubricating oil fuel feeding house steward, 1# lubricating oil pump motor A.C. contactor normally closed auxiliary contact, 2# lubricating oil pump motor A.C. contactor normally closed auxiliary contact are connected successively, connecting with the tripping mechanism that motor drag turbine set runs cabinet mesohigh vacuum circuit breaker accesses in the 220V direct supply in high voltage control loop, composition safe shutdown control loop; When 1# lubricating oil pump motor, 2# lubricating oil pump motor are all out of service, the normally closed auxiliary contact of 1# lubricating oil pump motor A.C. contactor and 2# lubricating oil pump motor A.C. contactor is all closed; Meanwhile; lubricating oil fuel feeding manifold pressure reduces gradually; when lubricating oil main's pressure is low to moderate lubricating oil fuel feeding manifold pressure switch setting value 80KPa; the upper pressure switch normally closed contact open in usual arranged of lubricating oil fuel feeding house steward closes; make the tripping mechanism in unit operation cabinet vacuum circuit breaker charged; vacuum circuit breaker trips, mair motor power-off, unit Concatenate shut-down.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232875.5A CN102778847B (en) | 2012-07-06 | 2012-07-06 | Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232875.5A CN102778847B (en) | 2012-07-06 | 2012-07-06 | Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system |
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| CN102778847A CN102778847A (en) | 2012-11-14 |
| CN102778847B true CN102778847B (en) | 2015-07-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112065699B (en) * | 2020-08-26 | 2022-10-11 | 珠海格力机电工程有限公司 | Motor control device and method and electrical equipment |
| CN113700663B (en) * | 2021-09-10 | 2024-01-16 | 唐山不锈钢有限责任公司 | Reliable interlocking system for lubricating protection of blast furnace blower |
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|---|---|---|---|---|
| EP0718541A1 (en) * | 1994-12-22 | 1996-06-26 | ABB Management AG | Method and device for self-lubricating of the bearings of a turbo-charger |
| CN1539998A (en) * | 2003-10-31 | 2004-10-27 | 武汉钢铁设计研究总院 | Control method for stopping power generation systm operated by using excess pressure of blast furnace gas and relevant software |
| CN201265735Y (en) * | 2008-09-27 | 2009-07-01 | 浙江广播电视大学 | Automatic control system for oil pumps |
| CN201326421Y (en) * | 2008-12-10 | 2009-10-14 | 上海电气电站设备有限公司 | Steam turbine lubricating oil supply device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002507711A (en) * | 1998-03-23 | 2002-03-12 | シーメンス アクチエンゲゼルシヤフト | Electromechanical actuators for valves and steam turbines |
| DE10324986B4 (en) * | 2003-06-03 | 2005-11-10 | Man B & W Diesel Ag | Device for emergency lubrication |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0718541A1 (en) * | 1994-12-22 | 1996-06-26 | ABB Management AG | Method and device for self-lubricating of the bearings of a turbo-charger |
| CN1539998A (en) * | 2003-10-31 | 2004-10-27 | 武汉钢铁设计研究总院 | Control method for stopping power generation systm operated by using excess pressure of blast furnace gas and relevant software |
| CN201265735Y (en) * | 2008-09-27 | 2009-07-01 | 浙江广播电视大学 | Automatic control system for oil pumps |
| CN201326421Y (en) * | 2008-12-10 | 2009-10-14 | 上海电气电站设备有限公司 | Steam turbine lubricating oil supply device |
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