CN103591431A - Outer circulation oil lubricating device for bearings of water-turbine generator sets - Google Patents
Outer circulation oil lubricating device for bearings of water-turbine generator sets Download PDFInfo
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- CN103591431A CN103591431A CN201310498047.0A CN201310498047A CN103591431A CN 103591431 A CN103591431 A CN 103591431A CN 201310498047 A CN201310498047 A CN 201310498047A CN 103591431 A CN103591431 A CN 103591431A
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- oil
- feed pump
- oil feed
- outer circulation
- generator set
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention provides an outer circulation oil lubricating device for bearings of water-turbine generator sets. The outer circulation oil lubricating device comprises one or a plurality of generator sets. Oil inlet pipelines are arranged on the upper portions of the generator sets, oil outlet pipelines are arranged on the lower portions of the generator sets, an oil storage device, an oil supply device, a filter device and an oil cooling device which are sequentially connected with one another in a lubricating oil circulation direction are arranged outside the generator sets, the oil storage device comprises a return oil tank, and lubricating oil is pumped out of the return oil tank by the oil supply device, sequentially flows through the filter device and the oil cooling device, flows into the generator sets, lubricates the bearings and then is delivered to the return oil tank via the oil outlet pipelines to complete primary outer circulation lubrication actions. The outer circulation oil lubricating device has the advantages that when oil cutout occurs due to accidents of the units, and a direct-current oil supply pump can be started to supply oil to the sets, so that the sets can normally complete shutdown tasks; a designed small energy storage oil tank can supplement supplied oil to prevent a low-flow condition of the direct-current oil supply pump in starting stages when the direct-current oil supply pump is started, so that flow cutout conditions of the bearings can be assuredly prevented, and the service ranges of the bearings can be extended.
Description
Technical field
The present invention relates to the bearing lubrication field of generator set, relate in particular to the oily outer circulation lubricating fitting of hydraulic generator unit bearing.
Background technique
Oil outer circulation cooling unit is to the high rotating speed horizontal hydrogenerator of large capacity group, to support the use, bearing is forced a kind of auxiliary device of cooling and lubricating, oil sump tank, oil pump, oil cooler, top petrol tank and Automation Elements, consists of.Lubricant oil is at oil sump tank, and---------top petrol tank---unit bearing---forms and circulates between oil sump tank oil cooler oil pump, thereby the heat producing while taking away bearing operation plays the effect to bearing cooling and lubricating.When unit occurs accident and while producing oily cutout situation, the stored oil of top petrol tank is unit fuel feeding 5 minutes by deadweight, makes unit energy complete shutdown task and does not damage bearing shell.Therefore device there are certain requirements the setting height(from bottom) of top petrol tank, thereby design has proposed necessary requirement for height to powerhouse of hydropower station, and power station can only not designed very highly because a top petrol tank will be installed a part for factory building when plant designing, also affected the aesthetic property of factory building integral layout.Therefore adopt aforesaid way, dependent station factory building height limits and can not be widely used.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of oily outer circulation lubricating fitting of hydraulic generator unit bearing, and it is simple in structure, easy for installation, is not subject to the restriction of factory building height and is widely used.
The technological scheme that technical solution problem of the present invention adopts is: the oily outer circulation lubricating system of hydraulic generator unit bearing, comprise one or more groups generator set, the lubricant oil that described generator set passes into by outside is lubricated the bearing of its inside, the top of described generator set is provided with in-line, the bottom of described generator set is provided with fuel-displaced pipeline, described generator set is provided with Fuel Tanking Unit outward, oil supplying device, filtrating equipment and oil cooler, described Fuel Tanking Unit, oil supplying device, filtrating equipment is connected successively by pipeline road with described oil cooler on the loop direction of described lubricant oil, described Fuel Tanking Unit comprises oil sump tank, described fuel-displaced pipeline passes into described oil sump tank, lubricant oil in described oil sump tank is extracted out by described oil supplying device, successively by described filtrating equipment, oil cooler, and enter described generator set by described in-line, to exporting described oil sump tank to by described fuel-displaced pipeline after bearing lubrication, form an outer circulation lubricated, oil sump tank is the device of deposit lubricant oil, the flow path of lubricant oil is oil sump tank---oil supplying device (oil pump)---filtrating equipment---oil cooler---bearing of cluster engine---oil sump tank, bearing to cluster engine is lubricated, and form circulation outward at cluster engine, filtrating equipment is sneaked into the unnecessary carbon deposit of lubricant oil for filtering to remove, guarantee the quality of lubricant oil, oil cooler is lowered the temperature to the lubricant oil of process at circulation time each time, guaranteeing to enter oil temperature in cluster engine can be not too high and lubricant oil was lost efficacy.
Described oil supplying device comprises for the first oil feed pump to the conventional fuel feeding of described generator set, to the second oil feed pump of the standby fuel feeding of described generator set and the 3rd oil feed pump to described generator set shutdown fuel feeding, described the first oil feed pump, the second oil feed pump is connected respectively described oil sump tank and described filtrating equipment separately with the 3rd oil feed pump, described the first oil feed pump, the second oil feed pump and the 3rd oil feed pump are extracted the lubricant oil in oil sump tank out, and send into filtrating equipment and enter oily outer circulation, described the first oil feed pump and the second oil feed pump are by described electric set electric supply, described the 3rd oil feed pump is powered by external direct current power supply, described the first oil feed pump, the second oil feed pump and the 3rd oil feed pump are connected in parallel on the outer circulation loop of described lubricant oil, described the first oil feed pump, the second oil feed pump and the 3rd oil feed pump can be separately respectively with described oil sump tank, filtrating equipment, oil cooler and cluster engine form the outer circulation loop of lubricant oil, and be independent of each other.
Oily outer circulation lubricating fitting of the present invention can be simultaneously for many group hydraulic generator units, when generator set starts, the lubricants capacity that the first oil feed pump provides must be able to meet the needed lubricants capacity of generator set normal operation, when the first oil feed pump breaks down, the second oil feed pump starts, to supplementing enough lubricant oil is provided in oily outer circulation, guarantee the running of generator set; When generator set breaks down; the first oil feed pump, the second oil feed pump all decommission because of power-off, but generator set still needs a period of time to complete shutdown task, and now the 3rd oil feed pump starts; in oily outer circulation, provide lubricant oil, guarantee that generator set can normally complete shutdown task.
Described Fuel Tanking Unit also comprises energy storage oil tank, described energy storage oil tank is provided with oil outlet and filler opening, described oil outlet is connected to described in-line, described filler opening is connected to described oil sump tank by the 4th oil feed pump, described the 4th oil feed pump is by described electric set electric supply, and described oil outlet is provided with solenoid valve.When generator set starts, the 4th oil feed pump is extracted lubricant oil to described energy storage oil tank fuel feeding out from oil sump tank, energy storage oil tank is pressurized container, at the 4th oil feed pump, in input, can store certain pressure in lubricant oil, because DC oil pump (the 3rd oil feed pump) there will be the situation of small flow to cause lubricant oil for shortage of oil from starting to the time that reaches rated speed, therefore need to be when starting the 3rd oil feed pump, open the solenoid valve of energy storage tank nozzle, energy storage oil tank provides lubricant oil by the pressure of self to generator set, as supplementing of the fuel delivery from zero rotating speed to the rated speed time period to DC oil pump, guarantee that bearing does not occur that cutout situation occurs.
Described oily outer circulation lubricating fitting also comprises controller, described controller is connected and controls its startup or close with cluster engine, the first oil feed pump, the second oil feed pump, the 3rd oil feed pump, the 4th oil feed pump, oil cooler and solenoid valve respectively, opening controller when generator set starts, controller starts according to the program of setting according to the working principle of above-mentioned each oil feed pump or closes described each oil feed pump, oil cooler and solenoid valve.
The maximum reservoir pressure of described energy storage oil tank is 0.8MPa, and the capacity of described energy storage oil tank is for being not less than 0.6m
3.The oil start up period that the capacity of energy storage oil tank guaranteeing to DC oil pump (i.e. the 3rd oil feed pump) supplements, and be generally 20～30s the starting time of the 3rd oil feed pump, so the capacity of energy storage oil tank does not need very large; And, the maximum reservoir pressure of energy storage oil tank can guarantee that lubricant oil wherein can be transported to generator set, therefore the mounting point of energy storage oil tank does not need very high, overcome the defect that needs to install top petrol tank in background technique, can guarantee the running of unit, save again space, expanded the Applicable scope of bearing oil outer circulation lubricating fitting.
Described the first oil feed pump is one or more, described a plurality of the first oil feed pump is connected in parallel on the outer circulation loop of described lubricant oil, when described generator set is while being a plurality of, the oil mass that first oil feed pump provides can not meet the demand of whole generator set, can not infinitely improve the rotating speed of oil feed pump again, therefore can adopt the first oil feed pump of a plurality of parallel connections.
When described the first oil feed pump is while being a plurality of, described a plurality of the first oil feed pump is corresponding one by one with described a plurality of generator set, lubricants capacity when the rated speed of described each the first oil feed pump can provide a generator set operation, when one of them first oil feed pump breaks down can not work time, controller receives that trouble signal starts the second oil feed pump, as supplementing the first oil feed pump of fault.
The rated speed of described the second oil feed pump is identical with described the first oil feed pump, just can guarantee supplementing the first oil feed pump of fault.
The rated speed of described the 3rd oil feed pump is for being not less than 1000r/min, and the rated speed of the 3rd oil feed pump only need to meet the lubricants capacity that can guarantee that shutdown work is required.
The rated speed of described the 4th oil feed pump is for being not less than 1450r/min, and the 4th oil feed pump is used for providing lubricant oil to energy storage oil tank, and makes the certain pressure of the inner formation of energy storage oil tank.
Described in-line is corresponding one by one with described generator set, described in-line is provided with oil mass transmitter, described oil mass transmitter is corresponding one by one with described generator set, oil mass transmitter is arranged on the place, lubricating oil inlet of cluster engine, for regulating entering the oil mass of each generator set according to actual conditions.
The invention has the beneficial effects as follows: the present invention is directed to the deficiencies in the prior art, designed a kind of oily outer circulation cooling and lubricating device of novel water wheels unit bearing, lubricant oil forms and circulates outside generator set, cancelled the top petrol tank of general oily external circulating device, adopt the mode that increases a DC oil pump, when there is accident and producing oily cutout situation in unit, start immediately DC oil pump and continue as unit fuel feeding 5 minutes, make unit energy normally complete shutdown task, for avoiding DC oil pump from starting the small flow situation occurring in the time period to reaching rated speed, the energy storage oil tank of a small volume of design, the small volume of energy storage oil tank, mounting point does not need very high, overcome the defect that needs to install top petrol tank in background technique, in the time of DC pump start, open immediately energy storage tank valve, as the supplementing from zero rotating speed to rated speed time period fuel delivery to DC oil pump, so both guaranteed that bearing did not occur that cutout situation occurs, saved again space, expanded Applicable scope.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
With reference to accompanying drawing.
The oily outer circulation lubricating system of hydraulic generator unit bearing of the present invention provides cooling and lubricating oil sources for 2 hydraulic generator units 1, the lubricant oil that described generator set 1 passes into by outside is lubricated the bearing of its inside, the top of described generator set 1 is provided with in-line 2, the bottom of described generator set 1 is provided with fuel-displaced pipeline 3, the outer Fuel Tanking Unit that is provided with of described generator set 1, oil supplying device, filtrating equipment 4 and oil cooler 5, described Fuel Tanking Unit, oil supplying device, filtrating equipment 4 is connected successively by pipeline road 7 with oil cooler 5 on the loop direction of described lubricant oil.
Described Fuel Tanking Unit comprises oil sump tank 6, described fuel-displaced pipeline 3 passes into described oil sump tank 6, lubricant oil in described oil sump tank 6 is extracted out by described oil supplying device, successively by described filtrating equipment 4, oil cooler 5, and enter described generator set 1 by described in-line 2, to exporting described oil sump tank 6 to by described fuel-displaced pipeline 3 after bearing lubrication, form once oily outer circulation lubricated.Oil sump tank 6 is devices of deposit lubricant oil, the flow path of lubricant oil is oil sump tank 6---oil supplying device---filtrating equipment 4---oil cooler 5---bearing of cluster engine 1---oil sump tank 6, at cluster engine, form circulation outward, and the bearing of cluster engine is lubricated.Filtrating equipment 4 is sneaked into the unnecessary carbon deposit of lubricant oil for filtering to remove, guarantee the quality of lubricant oil, oil cooler 5 is lowered the temperature to the lubricant oil of process at circulation time each time, and the lubricant oil of guaranteeing to enter in cluster engine 1 can not lose efficacy because oil temperature is too high.
Described oil supplying device comprises for the first oil feed pump 8 to described generator set 1 conventional fuel feeding, to the second oil feed pump 9 of described generator set 1 standby fuel feeding and the 3rd oil feed pump 10 of described generator set 1 being shut down to fuel feeding, described the first oil feed pump 8, the second oil feed pump 9 is connected respectively described oil sump tank 6 and described filtrating equipment 4 separately with the 3rd oil feed pump 10, described the first oil feed pump 8, the second oil feed pump 9 and the 3rd oil feed pump 10 are extracted the lubricant oil in oil sump tank 6 out, and send into filtrating equipment 4 and enter oily outer circulation, described the first oil feed pump 8 and the second oil feed pump 9 are by described electric set electric supply, described the 3rd oil feed pump 10 is powered by external direct current power supply, described the first oil feed pump 8, the second oil feed pump 9 and the 3rd oil feed pump 10 are connected in parallel on the outer circulation loop of described lubricant oil, described the first oil feed pump 8, the second oil feed pump 9 and the 3rd oil feed pump 10 can be separately respectively with described oil sump tank 6, filtrating equipment 4, oil cooler 5 and cluster engine 1 form the outer circulation loop of lubricant oil, and be independent of each other.
Described Fuel Tanking Unit also comprises energy storage oil tank 12, described energy storage oil tank 12 is provided with oil outlet 13 and filler opening 14, described oil outlet 13 is connected to described in-line 2, described filler opening 14 is connected to described oil sump tank 6 by the 4th oil feed pump 11, described oil outlet 13 is provided with solenoid valve 15, when generator set 1 starts, the 4th oil feed pump 11 is extracted lubricant oil to described energy storage oil tank 12 fuel feeding out from oil sump tank 6, energy storage oil tank 12 is pressurized container, at the 4th oil feed pump 11, in input, can store certain pressure in lubricant oil.
Described oily outer circulation lubricating fitting also comprises controller, described controller is connected and controls its startup or close with cluster engine 1, the first oil feed pump 8, the second oil feed pump 9, the 3rd oil feed pump 10, the 4th oil feed pump 11, oil cooler 5 and solenoid valve 14 respectively, opening controller when generator set starts, controller starts according to the program of setting according to the working principle of above-mentioned each oil feed pump or closes described each oil feed pump and oil cooler.
The maximum reservoir pressure of described energy storage oil tank 12 is 0.8MPa, and the capacity of described energy storage oil tank 12 is 0.6m
3.20～30s start up period that the capacity of energy storage oil tank 12 guaranteeing to the 3rd oil feed pump 10 supplements oil mass.
In the present embodiment, described generator set 1 is 2 groups, described the first oil feed pump 8 is 2, described 2 the first oil feed pumps 8 are connected in parallel on the outer circulation loop of described lubricant oil, 2 the first oil feed pumps 8 are corresponding one by one with described 2 generator set 1, the lubricants capacity when rated speed of described each the first oil feed pump 8 can provide 1 operation of a generator set, when one of them first oil feed pump 8 breaks down can not work time, controller receives that trouble signal starts the second oil feed pump 9, as supplementing the first oil feed pump 8 of fault.
The rated speed of described the second oil feed pump 9 is identical with described the first oil feed pump 8, just can guarantee supplementing the first oil feed pump 10 of fault.
The rated speed of described the 3rd oil feed pump 10 is 1000r/min, and the rated speed of the 3rd oil feed pump 10 only need to meet the required lubricants capacity of generator set shutdown work that can guarantee 5 minutes.
The rated speed of described the 4th oil feed pump 11 is 1450r/min, and the 4th oil feed pump 11 is for providing lubricant oil to energy storage oil tank, and makes that energy storage oil tank is inner forms certain pressure.
Described in-line 2 is corresponding one by one with described generator set 1, described in-line is provided with oil mass transmitter 16, described oil mass transmitter 16 is corresponding one by one with described generator set 1, oil mass transmitter 16 is arranged on the place, lubricating oil inlet of cluster engine 1, for regulating entering the oil mass of each generator set 1 according to actual conditions, prevent that oil mass from entering too much generator set and causing oil circuit to stop up unequal problem.
When device of the present invention starts, the first oil feed pump 8 is to generator set 1 normal fuel injection, the 4th oil feed pump 11 continues fuel feeding to energy storage oil tank 12, and in energy storage oil tank 12, form certain pressure, when the first oil feed pump 8 breaks down while causing fuel delivery to reduce, controller receives that trouble signal starts the second oil feed pump 9 for the supplementary fuel feeding of unit, when meeting other complex situations, make the fuel delivery of generator set 1 continue to reduce, or generator set 1 breaks down and shuts down while causing the first oil feed pump 8 and the second oil feed pump 9 power-off to quit work, the 3rd oil feed pump 10 starts immediately and continues fuel feeding 5 minutes for unit, make unit energy dead halt, because the 3rd oil feed pump 10 is DC oil pump, from startup, reaching to the time that rated speed needs is the time of 20～30 seconds, for avoiding the 3rd oil feed pump 10 start-up courses excessively may appear at fuel feeding cutout situation, solenoid valve 14 is opened, energy storage oil tank 12 relies on the pressure of self to supplement oil sources to generator set 1.
Technological scheme of the present invention is ideal through test effect, has both solved the difficult problem that limit to some extent to top petrol tank Installation Elevation in power station, can guarantee again the safe operation of generator set energy.
Above-described embodiment is for the invention will be further described, but do not limit the invention to these embodiments.One skilled in the art would recognize that the present invention contained all alternatives, improvement project and the equivalents that within the scope of claims, may comprise.
Claims (8)
1. the oily outer circulation lubricating fitting of hydraulic generator unit bearing, comprise one or more groups generator set (1), the lubricant oil that described generator set (1) passes into by outside is lubricated the bearing of its inside, it is characterized in that: the top of described generator set (1) is provided with in-line (2), the bottom of described generator set (1) is provided with fuel-displaced pipeline (3), described generator set is provided with Fuel Tanking Unit outward, oil supplying device, filtrating equipment (4) and oil cooler (5), described Fuel Tanking Unit, oil supplying device, filtrating equipment (4) is connected successively by pipeline road (7) with described oil cooler (5) on the loop direction of described lubricant oil, described Fuel Tanking Unit comprises oil sump tank (6), described fuel-displaced pipeline (3) passes into described oil sump tank (6), lubricant oil in described oil sump tank (6) is extracted out by described oil supplying device, successively by described filtrating equipment (4), oil cooler (5), and enter described generator set (1) by described in-line (2), to exporting described oil sump tank (6) to by described fuel-displaced pipeline (3) after bearing lubrication, form the outer circulation loop of described lubricant oil,
Described oil supplying device comprises for the first oil feed pump (8) to the conventional fuel feeding of described generator set (1), to second oil feed pump (9) of the standby fuel feeding of described generator set and the 3rd oil feed pump (10) to described generator set shutdown fuel feeding, described the first oil feed pump (8), the second oil feed pump (9) is connected respectively described oil sump tank (6) and described filtrating equipment (4) separately with the 3rd oil feed pump (10), described the first oil feed pump (8), the second oil feed pump (9) and the 3rd oil feed pump (10) are extracted the lubricant oil in oil sump tank out, and send into described filtrating equipment (4) and enter oily outer circulation, described the first oil feed pump (8) and the second oil feed pump (9) are powered by described generator set (1), described the 3rd oil feed pump (10) is powered by external direct current power supply, described the first oil feed pump (8), the second oil feed pump (9) and the 3rd oil feed pump (10) are connected in parallel on the outer circulation loop of described lubricant oil,
Described Fuel Tanking Unit also comprises energy storage oil tank (12), described energy storage oil tank (12) is provided with oil outlet (13) and filler opening (14), described oil outlet (13) is connected to described in-line (2), described filler opening (14) is connected to described oil sump tank by the 4th oil feed pump (11), and described oil outlet (13) is provided with solenoid valve (15);
Described oily outer circulation lubricating fitting also comprises controller, and described controller is connected and controls its startup or close with generator set (1), the first oil feed pump (8), the second oil feed pump (9), the 3rd oil feed pump (10), the 4th oil feed pump (11), oil cooler (5) and solenoid valve (15) respectively.
2. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 1, is characterized in that: the maximum reservoir pressure of described energy storage oil tank (12) is 0.8MPa, and the capacity of described energy storage oil tank (12) is for being not less than 0.6m
3.
3. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 1, is characterized in that: described the first oil feed pump (8) is for one or more, and described a plurality of the first oil feed pumps (8) are connected in parallel on the outer circulation loop of described lubricant oil.
4. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 3, it is characterized in that: when described the first oil feed pump (8) is when a plurality of, described a plurality of the first oil feed pumps (8) are corresponding one by one with described a plurality of generator set (1).
5. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 4, is characterized in that: the rated speed of described the second oil feed pump (9) is identical with the rated speed of described the first oil feed pump (8).
6. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 1; it is characterized in that: the rated speed of described the 3rd oil feed pump (10) is for being not less than 1000r/min; its rated flow, for being not less than 280L/min, can meeting to provide and shut down the required lubricants capacity of operation.
7. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 1, is characterized in that: the rated speed of described the 4th oil feed pump (11) is for being not less than 1450r/min, and its rated flow is for being not less than 52L/min.
8. the oily outer circulation lubricating fitting of hydraulic generator unit bearing as claimed in claim 4, it is characterized in that: described in-line (2) is corresponding one by one with described generator set (1), described in-line (2) is provided with oil mass transmitter (16), and described oil mass transmitter (16) is corresponding one by one with described generator set (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310498047.0A CN103591431B (en) | 2013-10-22 | 2013-10-22 | The oily outer circulation lubricating arrangement of turbine-generator units bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310498047.0A CN103591431B (en) | 2013-10-22 | 2013-10-22 | The oily outer circulation lubricating arrangement of turbine-generator units bearing |
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| CN103591431A true CN103591431A (en) | 2014-02-19 |
| CN103591431B CN103591431B (en) | 2016-08-24 |
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| CN104896287A (en) * | 2015-05-23 | 2015-09-09 | 安徽普源分离机械制造有限公司 | High-speed horizontal type spiral discharging decanting centrifuge bearing lubricating system |
| CN106566648A (en) * | 2016-09-19 | 2017-04-19 | 新疆福克油品股份有限公司 | Compensation device for power outage self-saving of waste lubricating oil regeneration production line |
| CN107524554A (en) * | 2016-06-20 | 2017-12-29 | 东方电气集团东方电机有限公司 | A kind of outer circulation cooling body of hydraulic generator thrust bearing |
| CN108871774A (en) * | 2018-04-28 | 2018-11-23 | 太原科技大学 | A kind of oil feeding line for filmatic bearing testing stand |
| CN115306510A (en) * | 2022-08-08 | 2022-11-08 | 潍柴动力股份有限公司 | Engine oil supply system, engine and oil supply method |
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| Publication number | Publication date |
|---|---|
| CN103591431B (en) | 2016-08-24 |
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