CN104879173B - The standby fueller of Generator Set main shaft bearing lubricating system - Google Patents

The standby fueller of Generator Set main shaft bearing lubricating system Download PDF

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Publication number
CN104879173B
CN104879173B CN201510207016.4A CN201510207016A CN104879173B CN 104879173 B CN104879173 B CN 104879173B CN 201510207016 A CN201510207016 A CN 201510207016A CN 104879173 B CN104879173 B CN 104879173B
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main shaft
control valve
shaft bearing
pneumatic
vapour
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Expired - Fee Related
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CN201510207016.4A
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CN104879173A (en
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彭立
田丰
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彭立
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Priority to CN2015100296560 priority
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Priority to CN201510207016.4A priority patent/CN104879173B/en
Publication of CN104879173A publication Critical patent/CN104879173A/en
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Abstract

A kind of Generator Set standby fueller of main shaft bearing lubricating system, including: oil pump or membrane pump, for generating set main shaft bearing fuel feeding;Wherein, oil pump uses vapour or air impeller to drive, and membrane pump directly by steam or compressed air-driven, drives medium pipeline to be provided with control valve group, this control valve group includes a liquid or pneumatic on-off valve, one pneumatic control valve, by driving media flow direction sequential series to arrange, liquid or pneumatic on-off valve are front, for turning on and off driving medium, pneumatic control valve, rear, be used for regulating driving pressure medium, meet the rated operating pressure of driver;Described liquid or pneumatic on-off valve are parallel with an electromagnetic valve, as the redundant channel driving medium;This electromagnetic valve receives DCS signal when having electricity and opens, and automatically turns on when dead electricity;Described pneumatic control valve is parallel with a restricting orifice, and when pneumatic control valve fault can not be opened, most of vapour needed for driver or gas enter driver by this orifice plate, it is ensured that it is MIN exerts oneself.

Description

The standby fueller of Generator Set main shaft bearing lubricating system
Technical field
The present invention relates to power plants generating electricity unit main shaft bearing lubrication oil supply system, particularly relate to a kind of Generator Set standby fueller of main shaft bearing lubricating system.
Background technology
Modern power plants, either coal fired power generation, fuel gas generation, nuclear energy power generation or hydroelectric generation, for improving economy, unit is all towards development of maximizing, its bearing supporting unit rotor all uses sliding bearing, and the lubrication oil supply system of forced circulation need to be equipped with, these oil supply systems have various form, have main oil pump oil impeller system (as shown in Figure 1), main oil pump oil syringe system (as shown in Figure 2), gear pump oil supply system and electric oil pump oil supply system (as shown in Figure 3) etc..Their major function is all to provide continuous print lubricating oil to unit bearing, it is ensured that it forms dynamic pressure oil film, prevents axle from directly contacting with bearing, and dry friction, and the heat of band bearing running occur.Once system failure of oil feed; then can not form oil film; axle will directly contact with bearing; there is dry friction; although robot control system(RCS) can control compressor emergency shutdown; but owing to the quality of unit rotor is very big (up to tens of tons up to a hundred); having huge rotator inertia, dry friction, by last longer, can produce substantial amounts of heat in this process; temperature steeply rises; cause burning accident, and make the metallographic structure of main shaft surface change even to crack, thus produce huge rehabilitation expense; shortening the unit operation cycle, economic loss is huge.
Main oil pump oil impeller system, main oil pump oil ejector system and gear pump oil supply system in such systems, due to its self-centered characteristic, oil-break burning accident typically will not occur in normal course of operation, but in the Unit Commitment stage, owing to generating unit speed is not up to rated speed, its system is exerted oneself and is not met by unit requirement, and electronic auxiliary oil pump can only be relied on to unit fuel feeding, in this process as there is dead electricity or electrical fault, then can cause failure of oil feed.And electric oil pump oil supply system no matter which kind of state unit is in, as long as dead electricity or electrical fault all can cause oil-break burning accident.
So the above system all reliabilities to power supply-distribution system and motor quality have a certain degree of dependence, but owing to some such as air switch, catalyst, relay etc. links must be passed through for distribution, it controls loop and also to be arranged by various sensors, as long as one of them link breaks down all can make Oil pump electrical machinery power down.Although respectively manufacturing and designing unit and electricity power enterprise also thinking that various way such as increases redundancy etc., attempt to reduce the danger of this power down, but these oil-break burning accidents caused due to auxiliary oil pump and electric oil pump power down or fault still happen occasionally in each high-power station.
For solving this problem, can only rely on a kind of can be without the fuel feeding measure of electric energy when generator protection is shut down.Former generating set capacity is less, can solve this problem with top petrol tank in thousand of or several ten thousand kilowatt hours, because at this moment grease-box and top petrol tank are the least, it is arranged and install and is all easier.Hundreds of thousands kilowatt kilowatt hour the most up to a million was developed into later along with unit capacity, it is arranged and installs and has just become complexity and difficulty (see figure 4), as for 600MW grade Turbo-generator Set, its satisfactory top petrol tank includes that oil its weight of weight will be more than 100 tons, install in existing Factory Building and be nearly impossible, even if being divided into several little fuel tank, mounting arrangements is the most highly difficult, the most also makes system become complicated.Additionally the oil of top petrol tank all needs when compressor emergency shutdown to return to grease-box; and the volume of set lubricant oil case is the biggest; its volume is just made to become much larger; so the biggest difficulty all can be brought to the layout of grease-box and top petrol tank; unless increase hall space, this again Hui Shi power plant cost be significantly increased.Certainly a way is also had just to be to increase an auxiliary fuel tank to receive the oil return of top petrol tank, the most not only need to increase space to place auxiliary fuel tank, and the oil return of top petrol tank must also return to auxiliary fuel tank through main fuel tank, must also join a pump when again opening machine and the oil of auxiliary fuel tank is returned main fuel tank, system just becomes complicated.Last this cover system of top petrol tank seems simple, actually have to pass through the calculating of precision, its capacity, flow velocity must match with the idling curve of every unit, careless slightly, it is easy to watt accident of grinding, because in unit down speeding procedure, the oil film thickness of sliding bearing has the most thinning trend, once for shortage of oil it is possible to oil film can be made to be destroyed.
Summary of the invention
For solving the problems referred to above, the present invention provides a kind of vapour or pneumatic fueller, as the standby measure of substitute of existing electronic fueller, to guarantee the safety of generator main axle bearing.
The technical scheme is that
A kind of Generator Set standby fueller of main shaft bearing lubricating system, including:
-oil pump, for main shaft bearing fuel feeding, the described oil-in to main shaft bearing fuel feeding passes through pipeline communication grease-box, and the described oil-out to main shaft bearing fuel feeding leads to main shaft bearing by pipeline, is provided with check-valves on flowline;
-driver, for driving oil pump, this driver is vapour or air impeller, its output shaft connects oil pump, its driving medium entrance connects vapour source or source of the gas by pipeline, pipeline is provided with control valve group, this control valve group includes a liquid or pneumatic on-off valve, one pneumatic control valve, by driving media flow direction sequential series to arrange, liquid or pneumatic on-off valve are front, for turning on and off driving medium, pneumatic control valve, rear, be used for regulating driving pressure medium, meet the rated operating pressure of driver.
Described liquid or pneumatic on-off valve are parallel with an electromagnetic valve, as the redundant channel driving medium;This electromagnetic valve receives DCS signal when having electricity and opens, and automatically turns on when dead electricity.
Described pneumatic control valve is parallel with a restricting orifice, and when pneumatic control valve fault can not be opened, most of vapour needed for driver or gas enter driver by this orifice plate, it is ensured that it is MIN exerts oneself.
Described driver is vapour or gas decompressor, vapour or one of gas motor, vapour or air turbine.
Described vapour or gas decompressor are screws, may also be piston type, can also be turbine type.
Described vapour source from vapour more than boiler of power plant, also may be from vapour more than power plant steam header, may also come from vapour more than plant steam tube;Described source of the gas is from air compression station, and this air compression station includes that air compressor machine and air accumulator, the top of described air accumulator are provided with relief valve.
The another kind of technical scheme of the present invention is:
A kind of Generator Set standby fueller of main shaft bearing lubricating system, including membrane pump, for to main shaft bearing fuel feeding, the described oil-in to main shaft bearing fuel feeding passes through pipeline communication grease-box, the described oil-out to main shaft bearing fuel feeding leads to main shaft bearing by pipeline, is provided with check-valves on flowline;This membrane pump is vapour or pneumatic diaphragm pump, its driving medium entrance connects vapour source or source of the gas by pipeline, pipeline is provided with control valve group, and this control valve group includes a liquid or pneumatic on-off valve, a pneumatic control valve, arrange by driving media flow direction sequential series, liquid or pneumatic on-off valve, front, are used for turning on and off driving medium, and pneumatic control valve is rear, for regulating driving pressure medium, meet the rated operating pressure of driver.
Described liquid or pneumatic on-off valve are parallel with an electromagnetic valve, as the redundant channel driving medium;This electromagnetic valve receives DCS signal when having electricity and opens, and automatically turns on when dead electricity.
Described pneumatic control valve is parallel with a restricting orifice, and when pneumatic control valve fault can not be opened, most of vapour needed for driver or gas enter driver by this orifice plate, it is ensured that it is MIN exerts oneself.
Beneficial effects of the present invention:
The present invention by vapour or air impeller as electric motor driven oil pump to the standby measure of substitute of system fuel feeding; its vapour or source of the gas are from remaining vapour, the remaining vapour of steam header, the remaining vapour of jet chimney or the air compression station air accumulator of the boiler of enough capacity and pressure; when after generator outage, rotor continues to rotate because of inertia; and electronic oil feed pump because of fault cannot normally work time; vapour or air impeller drive oil pump or by pneumatic diaphragm pump to system fuel feeding; main shaft bearing is lubricated, it is ensured that main shaft bearing will not oil-break.As the standby measure of substitute of electronic fueller, enhance the safety of generating set.
Accompanying drawing explanation
Fig. 1 is prior art one fueller structure chart
Fig. 2 is prior art another kind fueller structure chart
Fig. 3 is another fueller structure chart of prior art
Fig. 4 is a kind of structure chart of fueller of the present invention
Fig. 5 is the another kind of structure chart of fueller of the present invention.
Detailed description of the invention
Embodiment one
See Fig. 4, the standby fueller of this Generator Set main shaft bearing lubricating system, including:
-oil pump 9, for main shaft bearing fuel feeding, its oil-in passes through pipeline communication grease-box, and its oil-out leads to main shaft bearing by pipeline, and described flowline is provided with check-valves 10;
-driver 1, be used for driving oil pump 9, described driver 1 be vapour or gas decompressor, vapour or gas motor, vapour or air turbine any one, described vapour or gas decompressor are screws, may also be piston type, can also be turbine type driver.The output shaft of driver 1 connects oil pump, its driving medium entrance connects vapour source or source of the gas by pipeline, pipeline is provided with control valve group, and this control valve group includes a liquid or pneumatic on-off valve 3, a pneumatic control valve 8, arrange by driving media flow direction sequential series, liquid or pneumatic on-off valve 3, front, are used for turning on and off driving medium, and pneumatic control valve 8 is rear, for regulating driving pressure medium, meet the rated operating pressure of driver 1.
Described liquid or pneumatic on-off valve are parallel with an electromagnetic valve 7, as the redundant channel driving medium;This electromagnetic valve 7 receives DCS signal when having electricity and opens, and automatically turns on when dead electricity.
Described pneumatic control valve 8 is parallel with a restricting orifice 2, and when pneumatic control valve 8 fault can not be opened, most of vapour or gas needed for driver 1 enter driver 1 by this orifice plate 2, it is ensured that driver 1 is MIN exerts oneself.
Described vapour source from vapour more than boiler of power plant, also may be from vapour more than power plant steam header, may also come from vapour more than plant steam tube;Described source of the gas is from air compression station, and this air compression station includes that air compressor machine and air accumulator, the top of described air accumulator are provided with relief valve.
Embodiment two
See Fig. 5,
The standby fueller of this Generator Set main shaft bearing lubricating system, including membrane pump 1, for main shaft bearing fuel feeding, its oil-in passes through pipeline communication grease-box, its oil-out leads to main shaft bearing by pipeline, and described flowline is provided with check-valves 10, prevents lubricating oil from flowing backwards;This membrane pump 1 is vapour or pneumatic diaphragm pump, its driving medium entrance connects vapour source or source of the gas by pipeline, pipeline is provided with control valve group, and this control valve group includes a liquid or pneumatic on-off valve 3, a pneumatic control valve 8, arrange by driving media flow direction sequential series, liquid or pneumatic on-off valve 3, front, are used for turning on and off driving medium, and pneumatic control valve 8 is rear, for regulating driving pressure medium, meet the rated operating pressure of driver 1.
For further enhancing reliability, an electromagnetic valve 7 can be parallel with on liquid or pneumatic on-off valve 3, as the redundant channel driving medium;This electromagnetic valve 7 receives DCS signal when having electricity and opens, and automatically turns on when dead electricity.Also can on pneumatic control valve 8 restricting orifice 2 in parallel, when pneumatic control valve 8 fault can not be opened, most of vapour or gas needed for driver 1 enter driver 1 by this orifice plate 2, it is ensured that it is MIN exerts oneself.
It addition, for prevent the lubricating oil in lubricating oil mother's pipe from flowing back to oil pump 9, check-valves 10 can be set up on the flowline of oil pump 9.
The work process of this device:
Before generating set is properly functioning, should there be enough steam or compressed air.
When generating set is shut down; when lubricating oil pressure is down to a certain setting value; surge or pneumatic on-off valve 3 and electromagnetic valve 7 are all opened; pneumatic control valve 8 is opened; steam or compressed air enter driver 1, drive oil pump 9 to operate, and lubricating oil pumps into lubricating oil mother pipe; it is sent to generator main axle bearing, it is achieved lubrication through lubricating oil mother's pipe.
Embodiment three
See Fig. 5, except with in addition to the vapour in pneumatic diaphragm pump 1 alternate embodiment one or air impeller and oil pump, remaining is all identical with embodiment one.

Claims (7)

1. the standby fueller of Generator Set main shaft bearing lubricating system, including:
-oil pump, for main shaft bearing fuel feeding, to the oil-in of main shaft bearing fuel feeding by pipeline communication grease-box, leading to main shaft bearing to the oil-out of main shaft bearing fuel feeding by pipeline, be provided with check-valves on flowline;
-driver, for driving oil pump, this driver is vapour or air impeller, its output shaft connects oil pump, its driving medium entrance connects vapour source or source of the gas by pipeline, pipeline is provided with control valve group, this control valve group includes a liquid or pneumatic on-off valve, one pneumatic control valve, by driving media flow direction sequential series to arrange, liquid or pneumatic on-off valve are front, for turning on and off driving medium, pneumatic control valve, rear, be used for regulating driving pressure medium, meet the rated operating pressure of driver;
Described liquid or pneumatic on-off valve are parallel with an electromagnetic valve, as the redundant channel driving medium;This electromagnetic valve receives DCS signal when having electricity and opens, and automatically turns on when dead electricity;
Described pneumatic control valve is parallel with a restricting orifice, and when pneumatic control valve fault can not be opened, most of vapour needed for driver or gas enter driver by this orifice plate, it is ensured that it is MIN exerts oneself.
2. the Generator Set standby fueller of main shaft bearing lubricating system as claimed in claim 1, it is characterised in that described driver is one of vapour or gas decompressor, vapour or gas motor.
3. the Generator Set standby fueller of main shaft bearing lubricating system as claimed in claim 2, it is characterised in that described vapour or gas decompressor are screws, may also be piston type.
4. the Generator Set standby fueller of main shaft bearing lubricating system as claimed in claim 1, it is characterised in that described vapour source from vapour more than boiler of power plant, also may be from vapour more than power plant steam header, may also come from vapour more than plant steam tube;Described source of the gas is from air compression station, and this air compression station includes that air compressor machine and air accumulator, the top of described air accumulator are provided with relief valve.
5. the Generator Set standby fueller of main shaft bearing lubricating system, including membrane pump, for to main shaft bearing fuel feeding, to the oil-in of main shaft bearing fuel feeding by pipeline communication grease-box, lead to main shaft bearing to the oil-out of main shaft bearing fuel feeding by pipeline, flowline is provided with check-valves;This membrane pump is vapour or pneumatic diaphragm pump, its driving medium entrance connects vapour source or source of the gas by pipeline, pipeline is provided with control valve group, and this control valve group includes a liquid or pneumatic on-off valve, a pneumatic control valve, arrange by driving media flow direction sequential series, liquid or pneumatic on-off valve, front, are used for turning on and off driving medium, and pneumatic control valve is rear, for regulating driving pressure medium, meet the rated operating pressure of driver.
6. the Generator Set standby fueller of main shaft bearing lubricating system as claimed in claim 5, it is characterised in that described liquid or pneumatic on-off valve are parallel with an electromagnetic valve, as the redundant channel driving medium;This electromagnetic valve receives DCS signal when having electricity and opens, and automatically turns on when dead electricity.
7. the Generator Set standby fueller of main shaft bearing lubricating system as claimed in claim 5, it is characterized in that, described pneumatic control valve is parallel with a restricting orifice, when pneumatic control valve fault can not be opened, most of vapour needed for driver or gas enter driver by this orifice plate, it is ensured that it is MIN exerts oneself.
CN201510207016.4A 2015-01-21 2015-04-28 The standby fueller of Generator Set main shaft bearing lubricating system Expired - Fee Related CN104879173B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201510029656.0A CN104533546A (en) 2015-01-21 2015-01-21 Standby oil supply device of large generator set main shaft bearing lubricating system
CN2015100296560 2015-01-21
CN201510207016.4A CN104879173B (en) 2015-01-21 2015-04-28 The standby fueller of Generator Set main shaft bearing lubricating system

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CN201510207016.4A CN104879173B (en) 2015-01-21 2015-04-28 The standby fueller of Generator Set main shaft bearing lubricating system

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Publication number Priority date Publication date Assignee Title
CN104832223B (en) * 2015-06-02 2016-03-02 济南达能动力技术有限责任公司 There is dead electricity self set-up type to meet an urgent need the steam turbine of oil supply system and method for work thereof
US20190136727A1 (en) * 2016-05-13 2019-05-09 Castrol Limited Apparatus and Method
CN105864621B (en) * 2016-06-15 2018-03-27 武汉钢铁有限公司 A kind of fueller and method
CN110319336B (en) * 2018-03-29 2020-09-22 上海梅山钢铁股份有限公司 Emergency lubricating oil supplementing and pressure maintaining system for blast furnace blower

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB781758A (en) * 1953-11-13 1957-08-28 Dowty Fuel Syst Ltd Improvements in liquid fuel supply systems for gas turbine engines
JPH04330303A (en) * 1991-01-30 1992-11-18 Fuji Electric Co Ltd Emergency lubricating oil supply device for steam turbine facility
CN103062609A (en) * 2012-12-25 2013-04-24 清华大学 Nuclear power sliding bearing oil feeding system based on comprehensive measurement of flow, pressure and temperature
JP2013079633A (en) * 2011-10-05 2013-05-02 Toshiba Corp Steam turbine lubricating oil supply device and steam turbine system
CN203640781U (en) * 2013-12-31 2014-06-11 淄博桑特动力设备有限公司 Self-starting oil supply steam turbine
CN203925616U (en) * 2014-05-19 2014-11-05 山东电力建设第三工程公司 The steam turbine generator suit oil-piping half oil outer circulatory system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB781758A (en) * 1953-11-13 1957-08-28 Dowty Fuel Syst Ltd Improvements in liquid fuel supply systems for gas turbine engines
JPH04330303A (en) * 1991-01-30 1992-11-18 Fuji Electric Co Ltd Emergency lubricating oil supply device for steam turbine facility
JP2013079633A (en) * 2011-10-05 2013-05-02 Toshiba Corp Steam turbine lubricating oil supply device and steam turbine system
CN103062609A (en) * 2012-12-25 2013-04-24 清华大学 Nuclear power sliding bearing oil feeding system based on comprehensive measurement of flow, pressure and temperature
CN203640781U (en) * 2013-12-31 2014-06-11 淄博桑特动力设备有限公司 Self-starting oil supply steam turbine
CN203925616U (en) * 2014-05-19 2014-11-05 山东电力建设第三工程公司 The steam turbine generator suit oil-piping half oil outer circulatory system

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CN104533546A (en) 2015-04-22

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