CN106014966A - Single-cylinder diesel engine oil delivery pump - Google Patents

Single-cylinder diesel engine oil delivery pump Download PDF

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Publication number
CN106014966A
CN106014966A CN201610602968.0A CN201610602968A CN106014966A CN 106014966 A CN106014966 A CN 106014966A CN 201610602968 A CN201610602968 A CN 201610602968A CN 106014966 A CN106014966 A CN 106014966A
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CN
China
Prior art keywords
rotor
oil
transmission shaft
cylinder diesel
power transmission
Prior art date
Application number
CN201610602968.0A
Other languages
Chinese (zh)
Other versions
CN106014966B (en
Inventor
孙晓顺
黄萧
杨后松
李传金
Original Assignee
江苏金湖输油泵有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201610602968.0A priority Critical patent/CN106014966B/en
Publication of CN106014966A publication Critical patent/CN106014966A/en
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Publication of CN106014966B publication Critical patent/CN106014966B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023Axial sealings for working fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/30Casings or housings

Abstract

The invention discloses a single-cylinder diesel engine oil delivery pump. The single-cylinder diesel engine oil delivery pump comprises a pump body, a transmission shaft and a rotor assembly, wherein the pump body is provided with a certain inner space; a shaft hole and a rotor groove which are communicated with each other are formed in the pump body; the transmission shaft is arranged in the shaft hole; the rotor assembly is arranged in the rotor groove; the rotor assembly is sleeved on the transmission shaft and comprises an inner rotor and an outer rotor; the inner rotor and the outer rotor are successively sleeved on the transmission shaft from inside to outside; the inner rotor is optionally connected with the transmission shaft via a dismountable transmission pin; the inner rotor rotates along rotation of the transmission shaft; the outer rotor is subjected to eccentric motion along the inner rotor. The single-cylinder diesel engine oil delivery pump has the beneficial effects that the parts, the processes and the structure complexity are reduced under the condition that the same requirement is met, the processing cost and the assembling cost are reduced, the occurrence rate of liquid leakage is reduced, and the oil pumping efficiency and the assembling efficiency are improved.

Description

Single cylinder diesel oil transfer pump
Technical field
The present invention relates to a kind of oil transfer pump, particularly to a kind of single cylinder diesel oil transfer pump.
Background technology
Along with Single Cylinder Diesel Engine Emission code enforcement, former Single Cylinder Diesel Engine Emission can not meet existing Abgasgesetz Requirement, needs to improve single cylinder diesel structure innovation to reach emission regulation demands.Wherein one-cylinder diesel Machine fuel system part is important improvement part.Single cylinder diesel oil transfer pump is single cylinder diesel fuel system Partly vitals, single cylinder diesel oil transfer pump effect is to be carried with certain pressure and flow by oil tank fuel To single cylinder diesel fuel system, it is ensured that single cylinder diesel fuel system fuel oil is stably supplied, and makes single cylinder bavin Oil machine stable performance, discharge low.
The single cylinder diesel oil transfer pump of present stage has the disadvantage in that
1. cost is high, and pump oil efficiency is low;
2. it is susceptible to leakage;
3. power transmission shaft can not monitor in real time with the wear condition of oil sealing, thus can not change in time.
Summary of the invention
For weak point present in above-mentioned technology, it is an object of the invention to provide a kind of single cylinder diesel Oil transfer pump, it is ensured that reduce part and operation and structure complexity on the premise of reaching identical requirement, reduce Processing, assembly cost, reduce leakage incidence rate, improves pump oil and efficiency of assembling.
In order to realize the above-mentioned purpose according to the present invention and other advantages, it is provided that a kind of single cylinder diesel is defeated Oil pump, it is characterised in that including:
Having the pump housing of certain inner space, this pump housing is provided with axis hole and rotor slot communicatively;
It is located at the power transmission shaft in described axis hole;And
It is located at the rotor assembly in described rotor slot,
Wherein, described rotor assembly is set on described power transmission shaft, and described rotor assembly includes from inside to outside Being set in the internal rotor on described power transmission shaft and outer rotor successively, described internal rotor passes through with described power transmission shaft One dismountable trundle is selectively connected, and described internal rotor rotates with the rotation of described power transmission shaft, Described outer rotor makees eccentric motion with described internal rotor, and the diapire of described rotor slot is provided with at least one pair of moon The crescent of thread form.
Preferably, on described power transmission shaft, one end away from described rotor assembly is set with ball bearing.
Preferably, on described power transmission shaft, one end of the inner side of adjacent described rotor assembly is set with composite shaft Hold.
Preferably, described power transmission shaft is set with combination two-lip seal, and this combination two-lip seal is positioned at Between described ball bearing and composite bearing.
Preferably, the sidewall of described rotor slot is provided with oil-in and oil-out, described crescent pair Claiming and compartment of terrain is provided with two, described oil-in and oil-out have been respectively communicated with a described crescent, and The outlet of described oil-in and oil-out all external worlds with the described pump housing are connected.
Preferably, the outside of described rotor assembly is provided with the cover plate for closing described rotor slot.
Preferably, described combination two-lip seal includes left sealing lip and right sealing lip, described left sealing lip And being provided with the leakage of oil groove of a loop between right sealing lip, the diapire of described leakage of oil groove is provided with at least one Oil leaking hole.
Preferably, the described pump housing is additionally provided with and is connected with described leakage of oil groove and leads to outside the described pump housing The leakage of oil observation port on boundary.
Preferably, the described pump housing is provided with relief hole, is provided with and discharges institute for selectivity in this relief hole Stating the relief valve assembly of oil pressure in crescent, described relief valve assembly includes steel ball, returning spring, screw thread Stick harness and copper sheathing valve seat.
Preferably, the outer surface of described outer rotor or internal rotor is coated with tungsten carbide coating.
Compared with prior art, it provides the benefit that the present invention: guarantee on the premise of reaching identical requirement Reduce part and operation and structure complexity, reduce processing, assembly cost, reduce leakage incidence rate, carry High pump oil and efficiency of assembling.
Accompanying drawing explanation
Fig. 1 is the three dimensional structure schematic diagram of the single cylinder diesel oil transfer pump according to one embodiment of the invention;
Fig. 2 is the top view of the single cylinder diesel oil transfer pump according to one embodiment of the invention;
Fig. 3 is the axial sectional view of the single cylinder diesel oil transfer pump according to one embodiment of the invention;
Fig. 4 is the local in the single cylinder diesel oil transfer pump according to one embodiment of the invention at relief valve assembly Sectional view;
Fig. 5 is the explosive view of the single cylinder diesel oil transfer pump according to one embodiment of the invention;
Fig. 6 is the three-dimensional combining two-lip seal in the single cylinder diesel oil transfer pump according to one embodiment of the invention Structural representation;
Fig. 7 is to combine facing of two-lip seal in the single cylinder diesel oil transfer pump according to one embodiment of the invention Figure;
Fig. 8 is the front view of the single cylinder diesel oil transfer pump middle pump body according to one embodiment of the invention.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings, the foregoing end other objects of the present invention, Feature, aspect and advantage will be apparent from, to make those skilled in the art with reference to description word energy Enough implement according to this.
With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 5, single cylinder diesel oil transfer pump 100 includes: have certain The pump housing 110 of inner space, driving section 120 and relief valve assembly 130, wherein, the pump housing 110 connects Be provided with axis hole 111a and rotor slot 111b, driving section 120 include power transmission shaft 121, ball bearing 122, Combination two-lip seal 123, composite bearing 124 and rotor assembly, power transmission shaft 121 is located at axis hole 111a In, ball bearing 122 is set in the one end away from rotor assembly described on power transmission shaft 121, composite bearing 124 Being set in one end of the inner side of adjacent described rotor assembly on power transmission shaft 121, combination two-lip seal 123 overlaps It is loaded on power transmission shaft 121, and between ball bearing 122 and composite bearing 124, described rotor assembly Being located in rotor slot 111b, described rotor assembly includes being set in the most successively on power transmission shaft 121 Internal rotor 125 and outer rotor 126, internal rotor 125 and power transmission shaft 121 are by a dismountable trundle 121a is selectively connected, and internal rotor 125 rotates with the rotation of power transmission shaft 121, outer rotor 126 with Internal rotor 125 makees eccentric motion, and the diapire of rotor slot 111b offers meniscate crescent 111b '. In one embodiment, power transmission shaft 121 is also arranged with back-up ring 121b, back-up ring 121b and is attached at ball bearing The outside of 122 prevents the axial float of power transmission shaft 121, increases the abrasion of cover plate 127.
With reference to Fig. 4, Fig. 5 and Fig. 8, the sidewall of rotor slot 111b is provided with oil-in 112 and oil-out 113, crescent 111b ' are symmetrical and compartment of terrain is provided with two, and oil-in 112 and oil-out 113 connect respectively Be connected with a crescent 111b ', and the outlet of oil-in 112 and oil-out 113 all with the pump housing 110 The external world is connected.
Referring again to Fig. 5, the outside of described rotor assembly is provided with the cover plate for enclosed rotor groove 111b 127.In one embodiment, the edge of cover plate 127 is provided with 3 installing hole 127b, can pass through bolt 127 It is connected fixing with the pump housing 110 for cover plate 127.
With reference to Fig. 6 and Fig. 7, combination two-lip seal 123 includes left sealing lip 123a and right sealing lip 123b, The leakage of oil groove 123c of a loop, leakage of oil groove 123c it is provided with between left sealing lip 123a and right sealing lip 123b Diapire be provided with at least one oil leaking hole 123d, if the combination inwall of two-lip seal 123 and power transmission shaft The outer wall of 121 weares and teares, thus causes oil liquid leakage to enter to combine inwall and the transmission of two-lip seal 123 In the little space of the outer wall of axle 121, and the fluid in this little space can be will leak out by oil leaking hole 123d It is discharged in leakage of oil groove 123c.In one embodiment, oil leaking hole 123d is provided with two.
Referring again to Fig. 4, side relative with cover plate 127 on the pump housing 110 is provided with and the pump housing 110 one The mounting flange 111c of molding, the pump housing 110 is additionally provided with and is connected with leakage of oil groove 123 and leads to described pump The extraneous leakage of oil observation port (slightly drawing) of body, if the left sealing lip 123a of combination two-lip seal 123 or Right sealing lip 123b occurs abrasion to cause oil leakage, can be collected the oil of leakage by leakage of oil groove 123, and lead to Cross described leakage of oil observation port to flow out, thus observed by operator, in order to operator's replacing group in time Closing two-lip seal 123 prevents power transmission shaft 121 and other associated components from wearing and tearing, simultaneously can be by described Leakage of oil observation port and oil leaking hole 123d keep the pressure within leakage of oil groove 123 equal with external pressure Weighing apparatus, prevents pressure from excessive combination two-lip seal 123 is formed extruding, to damage left sealing lip 123a close with the right side Envelope lip 123b.
With reference to Fig. 4 and Fig. 5, the pump housing 110 be provided with relief hole 111d, relief hole 111d be respectively communicated with Crescent 111b ' that oil-out 113 communicates and the crescent 111b ' communicated with oil-in 112, this is let out It is provided with in pressure hole 111d and discharges the relief valve assembly of oil pressure in described crescent 111b ' for selectivity 130.In one embodiment, relief valve assembly 130 includes steel ball 133, returning spring 132, thread plug Post 131 and copper sheathing valve seat 134, steel ball 133 is for selective shut-off copper sheathing valve seat 134, steel ball 133 Forming a switch with copper sheathing valve seat 134, copper sheathing valve seat 134 is fixed on the inside of relief hole 111d, makes The left side obtaining copper sheathing valve seat 134 connects the crescent 111b ' (high pressure chest) communicated with oil-out 113, copper The right side of set valve seat 134 connects the crescent 111b ' (low pressure chamber) communicated with oil-in 112, when fuel-displaced When mouthful oil pressure is more than setting value, oil pressure is pushed steel ball 133 open and is connected so that copper sheathing valve seat about 134 two The crescent 111b ' of side is connected, i.e. high pressure chest is connected with low pressure chamber, thus reduces the oil of high pressure chest Pressure, plays relief valve effect, and when oil-out oil pressure is reduced near the marginal value of setting value, steel ball 133 Again by copper sheathing valve seat 134 under the effect of returning spring 132, until oil-out oil pressure is more than setting Again copper sheathing valve seat 134 is again turned on during definite value, so moves in circles, it is ensured that in crescent 111b ' Pressure is not higher than limit value, needed for preventing oil pressure from exceeding diesel engine, it is ensured that safe and reliable work.
With reference to Fig. 3 and Fig. 5, in one embodiment, between cover plate 127 and the pump housing 110, it is additionally provided with O shape Sealing ring.
In one embodiment, the outer surface of outer rotor 126 or internal rotor 125 is coated with tungsten carbide coating, Coefficient of friction can be substantially reduced, reduce noise, improve outer rotor 126 and the use longevity of internal rotor 125 Life.
Operation principle:
1. when power transmission shaft 121 rotates, by power transmission shaft 121 equipped with trundle 121a drive in Rotor 125 rotates, and internal rotor 125 drives again outer rotor 126 to rotate, internal rotor 125 and outer rotor 126 Make eccentric motion, form oil sucting cavity and pumping cavity in chamber, left and right two, oil sucting cavity by fuel oil from diesel oil tank Sucking, then extruded by pumping cavity by fuel oil, power transmission shaft 121 constantly rotates under diesel engine balance shaft drives, Fuel oil is constantly exported by internal rotor 125 and outer rotor 126;
2. combination two-lip seal 123 in right sealing lip 123b be used for prevent the right pump chamber in diesel oil from transmission Axle 121 seepage, left sealing lip 123a be used for prevent left side pump chamber machine oil from power transmission shaft 121 seepage, if Left sealing lip 123a or the right sealing lip 123b of combination two-lip seal 123 occurs abrasion to cause oil leakage, The oil of leakage can be collected by leakage of oil groove 123, and flowed out by described leakage of oil observation port, thus be operated Personal observations arrives, in order to operator in time change combination two-lip seal 123 prevent power transmission shaft 121 and His associated component is worn and torn, and can keep leakage of oil by described leakage of oil observation port and oil leaking hole 123d simultaneously Pressure within groove 123 balances each other with external pressure, prevents pressure excessive to combination two-lip seal 123 Form extruding, damage left sealing lip 123a and right sealing lip 123b;
3. steel ball 133 and copper sheathing valve seat 134 form a switch, and copper sheathing valve seat 134 is fixed on relief hole The inside of 111d so that the left side of copper sheathing valve seat 134 connects the crescent communicated with oil-out 113 111b ' (high pressure chest), crescent the 111b ' (low pressure of the right side connection oil-in 112 of copper sheathing valve seat 134 Chamber), when oil-out oil pressure is more than setting value, oil pressure is pushed steel ball 133 open and is connected so that copper sheathing valve seat The crescent 111b ' of 134 left and right sides is connected, i.e. high pressure chest is connected with low pressure chamber, thus reduces The oil pressure of high pressure chest, plays relief valve effect, and when oil-out oil pressure is reduced near the marginal value of setting value Time, steel ball 133 under the effect of returning spring 132 again by copper sheathing valve seat 134, until fuel-displaced Again copper sheathing valve seat 134 is again turned on when mouth oil pressure is more than setting value, so moves in circles, it is ensured that crescent moon Pressure in groove 111b ' is not higher than limit value, needed for preventing oil pressure from exceeding diesel engine, it is ensured that safe and reliable Work.
Number of devices described herein and treatment scale are used to the explanation of the simplification present invention.To the present invention Application, modifications and variations will be readily apparent to persons skilled in the art.
According to the present invention, as described above, it is possible to obtain following beneficial effect:
1, guaranteeing to reduce part and operation and structure complexity on the premise of reaching identical requirement, minimizing adds Work, assembly cost, reduce leakage incidence rate, improves pump oil and efficiency of assembling;
2, find combination two-lip seal 123 seal failure in time, thus combination two-lip seal 123 is carried out Change, prevent the diesel engine caused due to single cylinder diesel lubrication failure from damaging;
3, the pressure in release crescent so that the output pressure of oil transfer pump is not above limit value, it is ensured that The safety of oil circuit and guarantee diesel engine steady operation.
Although embodiment of the present invention are disclosed as above, but it is not limited in description and embodiment Using listed by, it can be applied to various applicable the field of the invention completely, for being familiar with this area Personnel for, be easily achieved other amendment, therefore without departing substantially from claim and equivalency range Under the general concept limited, the present invention is not limited to specific details and shown here as the legend with description.

Claims (10)

1. a single cylinder diesel oil transfer pump, it is characterised in that including:
Having the pump housing of certain inner space, this pump housing is provided with axis hole and rotor slot communicatively;
It is located at the power transmission shaft in described axis hole;And
It is located at the rotor assembly in described rotor slot,
Wherein, described rotor assembly is set on described power transmission shaft, and described rotor assembly includes from inside to outside Being set in the internal rotor on described power transmission shaft and outer rotor successively, described internal rotor passes through with described power transmission shaft One dismountable trundle is selectively connected, and described internal rotor rotates with the rotation of described power transmission shaft, Described outer rotor makees eccentric motion with described internal rotor, and the diapire of described rotor slot is provided with at least one pair of moon The crescent of thread form.
2. single cylinder diesel oil transfer pump as claimed in claim 1, it is characterised in that on described power transmission shaft One end away from described rotor assembly is set with ball bearing.
3. single cylinder diesel oil transfer pump as claimed in claim 2, it is characterised in that on described power transmission shaft One end of the inner side of adjacent described rotor assembly is set with composite bearing.
4. single cylinder diesel oil transfer pump as claimed in claim 3, it is characterised in that on described power transmission shaft It is set with combination two-lip seal, and this combination two-lip seal is between described ball bearing and composite bearing.
5. single cylinder diesel oil transfer pump as claimed in claim 1, it is characterised in that described rotor slot Being provided with oil-in and oil-out on sidewall, described crescent is symmetrical and compartment of terrain is provided with two, described in enter Hydraulic fluid port and oil-out have been respectively communicated with a described crescent, and the outlet of described oil-in and oil-out is equal It is connected with the external world of the described pump housing.
6. single cylinder diesel oil transfer pump as claimed in claim 1, it is characterised in that described rotor assembly Outside be provided with the cover plate for closing described rotor slot.
7. single cylinder diesel oil transfer pump as claimed in claim 4, it is characterised in that described combination lips Oil sealing includes left sealing lip and right sealing lip, is provided with a loop between described left sealing lip and right sealing lip Leakage of oil groove, the diapire of described leakage of oil groove is provided with at least one oil leaking hole.
8. single cylinder diesel oil transfer pump as claimed in claim 7, it is characterised in that on the described pump housing also It is provided with the extraneous leakage of oil observation port being connected and leading to the described pump housing with described leakage of oil groove.
9. single cylinder diesel oil transfer pump as claimed in claim 5, it is characterised in that set on the described pump housing There is relief hole, be provided with in this relief hole and discharge the relief valve assembly of oil pressure in described crescent for selectivity, Described relief valve assembly includes steel ball, returning spring, screw thread stick harness and copper sheathing valve seat.
10. single cylinder diesel oil transfer pump as claimed in claim 1, it is characterised in that described outer rotor Or the outer surface of internal rotor is coated with tungsten carbide coating.
CN201610602968.0A 2016-07-28 2016-07-28 Single cylinder diesel oil transfer pump CN106014966B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610602968.0A CN106014966B (en) 2016-07-28 2016-07-28 Single cylinder diesel oil transfer pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610602968.0A CN106014966B (en) 2016-07-28 2016-07-28 Single cylinder diesel oil transfer pump

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Publication Number Publication Date
CN106014966A true CN106014966A (en) 2016-10-12
CN106014966B CN106014966B (en) 2019-04-09

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2859005Y (en) * 2005-12-09 2007-01-17 王何新 Engine oil pump
CN201057143Y (en) * 2007-06-18 2008-05-07 昆明理工大学 Engine oil pump for single and dual-cylinder horizontal diesel engine
CN201372923Y (en) * 2009-04-03 2009-12-30 王新宽 Single-cylinder diesel engine oil pump with pressure relief device
JP2010090843A (en) * 2008-10-09 2010-04-22 Mikuni Corp Pump
CN102678541A (en) * 2012-05-25 2012-09-19 山东鑫亚工业股份有限公司 Fuel delivery pump with floated cycloid rotor
CN204402869U (en) * 2014-12-01 2015-06-17 长春一东离合器股份有限公司 For the cooling oil pump of wet clutch
CN205937094U (en) * 2016-07-28 2017-02-08 江苏金湖输油泵有限公司 Single cylinder diesel petroleum pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2859005Y (en) * 2005-12-09 2007-01-17 王何新 Engine oil pump
CN201057143Y (en) * 2007-06-18 2008-05-07 昆明理工大学 Engine oil pump for single and dual-cylinder horizontal diesel engine
JP2010090843A (en) * 2008-10-09 2010-04-22 Mikuni Corp Pump
CN201372923Y (en) * 2009-04-03 2009-12-30 王新宽 Single-cylinder diesel engine oil pump with pressure relief device
CN102678541A (en) * 2012-05-25 2012-09-19 山东鑫亚工业股份有限公司 Fuel delivery pump with floated cycloid rotor
CN204402869U (en) * 2014-12-01 2015-06-17 长春一东离合器股份有限公司 For the cooling oil pump of wet clutch
CN205937094U (en) * 2016-07-28 2017-02-08 江苏金湖输油泵有限公司 Single cylinder diesel petroleum pump

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