CN109695566A - A kind of sealing lubrication structure of plunger pump - Google Patents
A kind of sealing lubrication structure of plunger pump Download PDFInfo
- Publication number
- CN109695566A CN109695566A CN201910046129.9A CN201910046129A CN109695566A CN 109695566 A CN109695566 A CN 109695566A CN 201910046129 A CN201910046129 A CN 201910046129A CN 109695566 A CN109695566 A CN 109695566A
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- Prior art keywords
- plunger
- pump
- oil
- pressure
- liquid
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- 238000005461 lubrication Methods 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 239000000314 lubricant Substances 0.000 claims abstract description 48
- 239000003921 oil Substances 0.000 abstract description 81
- 239000010687 lubricating oil Substances 0.000 abstract description 37
- 238000005086 pumping Methods 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 9
- 239000000446 fuel Substances 0.000 description 20
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- 238000000034 method Methods 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- 239000000295 fuel oil Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000012224 working solution Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010710 diesel engine oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A kind of sealing lubrication structure of plunger pump, including the pump housing, plunger, working cylinder duct, pump chamber, free-piston, into liquid non-return valve, go out liquid non-return valve, into lubricating oil check valve, lubricant reservoir, oil duct, annular lubricant oil groove, wherein working cylinder duct is separated into the lubricant reservoir of the pump chamber and the free-piston other end between one end of free-piston and plunger by free-piston in working cylinder duct；One end of the oil duct is connected to lubricant reservoir, the other end is connected to annular lubricant oil groove, keeps the lubricating oil pressure in annular oil-way equal with the fluid pressure in pump chamber；This structure overcomes the problem of liquid leakage of the plunger pump when pumping super-pressure low-viscosity (mobile) liquid, ensures that pumping low-viscosity (mobile) liquid pressure reaches 2500bar or more, ensure that the lubrication of plunger, the direct wear problem for contacting, overcoming plunger for avoiding plunger and working cylinder duct, effectively improves functional reliability and working life.
Description
Technical field
The present invention relates to a kind of plunger pump, the sealing lubrication structure of specially a kind of plunger pump belongs to plunger pump technique neck
Domain.
Background technique
Plunger pump has many advantages, such as that rated pressure is high, compact-sized, high-efficient, and high-pressure water cutting, superelevation is widely applied
The equipment of the output highly pressurised liquid such as pressure water jet derusting, Cleaning by High Pressure Water Jet, diesel engine high-pressure fuel pump.
The diesel oil viscosity that diesel engine high-pressure fuel pump is pumped is big, and the lubricating oil viscosity that lubricating oil oil pump is pumped is bigger,
The throttling of minim gap when due to plunger-type fuel pump pump oil between plunger and plunger duct inner wall to the oil liquid of the big viscosity of leakage
(i.e. on-way resistance) effect maintains the oil pressure in the pump chamber of plunger pump, and the big viscosity oil liquid of leakage simultaneously plays plunger
Good lubricating action, so plunger-type fuel pump generally uses clearance seal.
Plunger pump pumps low-viscosity (mobile) liquid (water and methanol etc.), because the viscosity of its liquid is small, not only according to clearance seal
There are problems that leakage rate is difficult to set up greatly high pumping pressure and there are plunger wear-out failure quickly, pumps low both at home and abroad
The plunger pump of viscous liquid all uses mechanical packing seal；Filler and plunger slidingsurface frictional heating and wear problem are not
Only limit pump speed, bigger problem is the service life of packing seal and pressure is inversely proportional, the service life of the higher packing seal element of pressure
It is shorter, operating pressure the low-viscosity (mobile) liquid plunger pump of 200MPa or more seal life only at 200 hours or so, work
Reliability is very poor.Operating pressure, reliability and the service life for improving low-viscosity (mobile) liquid high-pressure plunger pump need to solve low viscous
Spend sealing problem above-mentioned existing for liquid high pressure plunger pump.
The applicant is the plunger and plunger bushing quick-wearing of high pressure fuel pump when solving diesel oil machine burning low viscosity methanol fuel
The problem of failure, carries out unremitting research experiment and innovation to the sealing lubrication of plungers pump plunger, has carried out to research achievement
Reformed AHP three times:
First stage: the patent No.: ZL200620127615.1, entitled " multiple fuel diesel engine fuel injection pump " are adopted
With the gap opened on plunger bushing between oil-way constant pressure extreme pressure lubricant sealed plunger and plunger bushing, existing plunger
The pressure difference for the fuel oil pressure that alternation changes when pump oil and oil suction be more than when 1000bar, lubrication pressure are high lubricating oil enter fuel oil and occur
The problem of burn oil and fuel injector nozzle opening coking and blocking, the methanol fuel of low viscosity is bled into plunger when lubricating oil pressure is low
Cause the problem of plunger and plunger bushing wear-out failure in gap；Improve the patent No. of innovation: ZL201010527308.3, hair
A kind of bright title " low pressure difference hydraulic sealing type high-pressure common-rail fuel pump ", structure keeps lubricating oil pressure synchronous with fuel pressure
The problem of raising and reducing, overcoming burn oil and plunger wear failure；But it is sprayed with this patent structure design diesel engine
When oil pump product, the narrow space of discovery existing diesel oil bunkering pump, the oil pump product structure designed with this patent structure
Complexity, product structure size are big, are difficult to be attached on existing diesel, are difficult to promote and apply；
Second stage: to the above-mentioned patent No.: ZL201010527308.3 is improved, and overcomes that structure is complicated, bulky
A kind of 9 elements of complicated " low pressure difference hydraulic sealing type high-pressure common-rail fuel pump " structure are omitted in problem；" the one of innovation
The sealing lubrication structure of kind super-high-pressure plunger pump plunger " (patent No.: 201110217136.4), reduces high-precision part, subtracts
The consumption of the volume of small pump and raw material reduces manufacturing cost, and still keeps original repertoire, but with this
It finds to be limited by the structure that its pressure transmission oil har opening is connect with three oil canals in the work of one patent structure trial product, because of processing
The tool nose wearing part of pressure transmission oil har opening cannot surmount pressure transmission oil har opening out, cause pressure transmission oil har opening conicity big, exist
Deviation from circular from as defined in plunger and barrel assembly of diesel engine oil injection pump technical conditions JB/T7173.1 is not achieved less than 0.0005mm, circular cone
Degree is less than the standard of 20:0.0006mm, it is difficult to guarantee the snug sliding fit of high-precision pressure transmission oil har opening and free-piston
Problem；
Phase III: " a kind of diesel engine pluralities of fuel oil spout pump configuration " (patent No.: 201,820 664914.1) omits
Fall the structure that pressure transmission oil cylinder is connect with three oil canals, run through pressure transmission oil cylinder with working cylinder, is worn when processing pressure transmission oil har opening
Tool nose can surmount pressure transmission oil har opening out, to ensure that the circularity of pressure transmission oil har opening and conicity are up to state standards
It is required that ensure that the snug sliding fit of free-piston Yu pressure transmission oil har opening；Analyze the patent 201,820 664914.1,
A kind of processing technology of the diesel engine pluralities of fuel injection pump product of " diesel engine pluralities of fuel oil spout pump configuration " design can every trade
Property when, discovery processing biography vertical with working cylinder duct more than the processing technology of existing diesel injection pump and technological equipment
Required for compressing cylinder duct: processes and the corresponding technological equipment such as drilling, reaming, corase grinding hole, fine grinding hole considerably increase
Processing cost.
Summary of the invention
The purpose of the present invention is overcome using a kind of above-mentioned original invention " diesel engine pluralities of fuel oil spout pump configuration " (specially
Benefit number: 201,820 664914.1) processing pressure transmission oil cylinders more than the processing technology of existing diesel injection pump and technological equipment
Required for duct: processes and the corresponding technological equipment such as drilling, reaming, corase grinding hole, fine grinding hole are considerably increased and are processed into
This problem of.There is provided a kind of structure it is simpler, it is easy to manufacture, be easily guaranteed that machining accuracy, manufacturing cost it is low, still can be effective
The pressure of the lubrication and sealing, the pump liquid of low viscosities such as methanol that guarantee plunger reach 2500bar or more, functional reliability it is good,
The sealing lubrication structure of plunger long working life, not a kind of plunger pump of mechanical packing seal structure element；A kind of plunger
The sealing lubrication structure of pump can be used for the pluralities of fuel pumping pluralities of fuel of diesel engine, can be widely used for cutting as high-pressure water
Cut, the derusting of super-pressure pure water jets, Cleaning by High Pressure Water Jet, sea water pump, the equipments such as chemical pump high-pressure plunger pump.
For the purpose for realizing aforementioned present invention, applicant is to a kind of former patent of invention " diesel engine pluralities of fuel injection pump knot
Structure " (the patent No.: 201,820 664914.1) further progress " omitting elements ", the innovation of " element relationship change ", invention
The invention " a kind of sealing lubrication structure of plunger pump ".
The present invention adopts the following technical scheme:
A kind of sealing lubrication structure of plunger pump, including plunger 1, the pump housing 2, working cylinder duct 3, pump chamber 3.1, freely live
Plug 4, lubricant reservoir 5.1, annular lubricant oil groove 6, oil duct 6.1, into lubricating oil check valve 8, feed liquor check valve 11, go out liquid it is unidirectional
Valve 13, the first technique hole plug 17, the second technique hole plug 18；The working cylinder duct 3 is arranged in the pump housing 2；Described
Plunger 1 is slidably matched with working cylinder duct 3 in accurate in working cylinder duct 3；Described sets into lubricating oil check valve 7
Set one end in working cylinder duct 3；Pump chamber 3.1 is protruded into the setting of feed liquor check valve 11 on the pump housing 2 on the outside of the pump housing 2
It is interior；The liquid check valve 13 out is arranged on the pump housing 2 to be protruded into pump chamber 3.1 from the other side of the pump housing 2；It is characterized by: from
The pump chamber being separated into working cylinder duct 3, by working cylinder duct 3 by piston 4 between one end and plunger by piston 4
3.1 and 4 other end of free-piston lubricant reservoir 5.1；One end of the oil duct 6.1 is connected to lubricant reservoir 5.1, the other end
It is connected to annular lubricant oil groove 6.The pump chamber 3.1 is connected with one end of free-piston 4, the other end of free-piston 4 is through lubricating
Oil pocket 5.1, oil duct 6.1 are connected to annular lubricant oil groove 6.
Annular lubricant oil groove 6 on the hole wall in working cylinder duct 3 is set by the ring between plunger 1 and working cylinder duct 3
Shape microgap separates are as follows: is upwardly into the upper plug annular microgap 9 of pump chamber 3.1, from donut-type oil from annular lubricant oil groove 6
Slot 6 is to the lower plunger ring shape microgap 10 down toward 3 lower end of working cylinder duct；
Superhigh pressure liquid pressure during 1 uplink pump oil of plunger in pump chamber 3.1 is transmitted to lubrication through free-piston 4
Oil pocket 5.1, again through in lubricant reservoir 5.1, oil duct 6.1 pressure transmission to annular lubricant oil groove 6, keep under upper plug annular microgap 9
Lubrication pressure P in the annular lubricant oil groove 6 at endR1P is pressed with the fuel oil in the pump chamber 3.1 of upper endK1It is equal, i.e. PR1=PK1, in column
It fills in and the superhigh pressure liquid in pump chamber 3.1 is effectively prevented to enter upper plug annular microgap in the course of work of 1 uplink pump oil
9, effectively overcome the super-pressure low-viscosity (mobile) liquid leakage in pump chamber 3.1；Lubricating oil viscosity in annular lubricant oil groove 6 with
Pressure increases viscosity increase, since lower plunger ring shape microgap 10 is to the throttling action of thick oil, only a small amount of profit
Lubricating oil, which is released from annular lubricant oil groove 6 through lower plunger ring shape microgap 10, flows back to grease-box, the highly pressurised liquid in pump chamber 3.1
It pushes free-piston 4 to squeeze the lubricating oil in lubricant reservoir 5.1 and enters the supplement of annular lubricant oil groove 6 from lower plunger through oil duct 6.1
The lubricating oil that annular microgap 10 leaks keeps the lubricating oil pressure P in annular oil-way 6R1With the liquid in pump chamber 3.1
Pressure PK1It is equal, i.e. holding PR1=PK1, the superelevation in pump chamber 3.1 is effectively prevented during 1 uplink pump oil of plunger
Press liquid enters upper plug annular microgap 9, realizes the sealing to the super-pressure low-viscosity (mobile) liquid in pump chamber 3.1, effectively
Superhigh pressure liquid leakage problem is overcome, to ensure that the plunger pump generates the liquid pressure of the super-pressure of 2500bar or more
Power；Plunger 1 is suspended in working cylinder duct 3 by the thick oil in lower plunger ring shape microgap 10, avoids plunger 1
Surface and the contact of the matching surface in working cylinder duct 3, the lubrication of plunger 1 is effectively guaranteed, ensure that the work of plunger 1
Make reliability and with long service life.
Beneficial effects of the present invention:
1, applicant is to a kind of original patent of invention " diesel engine pluralities of fuel oil spout pump configuration " (patent No.: 201820
664914.1) further progress " omitting elements ", " element relationship change " innovation: dispense " pressure transmission oil cylinder 5 ", will be original
It is arranged in " free-piston 4 " setting to working cylinder duct 3 in pressure transmission oil cylinder duct 5, invents a kind of " sealing of plunger pump
Lubrication system " it is simpler, be more easily manufactured, reduce processing and the perpendicular pressure transmission oil cylinder duct 5 in working cylinder duct 3 must
Need: drilling, corase grinding hole, fine grinding 4 procedure of hole and corresponding technological equipment, improves production efficiency, reduces reaming
Processing charges, the cost for significantly reducing production；Still maintaining the applicant's original patent of invention, " a kind of diesel engine is more
Kind fuel injection pump configuration " (patent No.: 201,820 664914.1) original repertoire:
(1) it realizes no fuel oil or water leakage, the pump low-viscosity (mobile) liquids pressure such as methanol or water reaches 2500bar or more；
(2) it is effectively guaranteed the lubrication of plunger 1, avoids directly contacting, overcoming plunger for plunger 1 and cylinder holes road 3
1 with the wear problem in working cylinder duct 3, effectively improve functional reliability and working life；
(3) structure is simpler, considerably reduces manufacturing cost；
2, of the invention " a kind of sealing lubrication structure of plunger pump ", can be used for diesel engine pluralities of fuel pump pumping methanol,
A variety of low-viscosity fuels such as ethyl alcohol, can be used for making high-pressure water cutting, the derusting of super-pressure pure water jets, Cleaning by High Pressure Water Jet,
The implementation of the high-pressure plunger pump configuration of the equipments such as sea water pump, chemical pump.
Detailed description of the invention:
The schematic diagram of the sealing lubrication structure of plunger pump Fig. 1 of the invention；
Structural representation of the embodiment of the sealing lubrication structure of plunger pump Fig. 2 of the invention when pumping low-viscosity (mobile) liquid
Figure；
Structural representation of the embodiment of the sealing lubrication structure of plunger pump Fig. 3 of the invention in sucking low-viscosity (mobile) liquid
Figure；
Label in figure indicates are as follows: 1, plunger；2, the pump housing；3, working cylinder duct；3.1, pump chamber；4, free-piston；5.1,
Lubricant reservoir；5.4, annular microgap；6, annular lubricant oil groove；6.1, oil duct；7, into lubricating oil check valve；8, lubricating oil pipe
Interface；9, upper plug annular microgap；10, lower plunger ring shape microgap；11, into liquid non-return valve；12 feed liquor body interface tubes；
13, go out liquid non-return valve；14 highly pressurised liquid interface tubes；17, the first technique hole plug；18, the second technique hole plug；
Specific embodiment
Further description of the specific embodiments of the present invention with reference to the accompanying drawing.
A kind of sealing lubrication structure of plunger pump of the present invention as shown in Fig. 1, including plunger 1, the pump housing 2, work cylinder holes
Road 3, pump chamber 3.1, free-piston 4, lubricant reservoir 5.1, annular lubricant oil groove 6, oil duct 6.1, into lubricating oil check valve 7, feed liquor
Body check valve 11 goes out liquid non-return valve 13, the first technique hole plug 17, the second technique hole plug 18；Wherein working cylinder duct 3
It is arranged in the pump housing 2；Plunger 1 is slidably matched with working cylinder duct 3 in accurate in working cylinder duct 3, is slidably matched
Gap is 0.0015~0.0025 millimeter of annular minim gap, and plunger 1 is suspended in working cylinder duct by the lubricating oil in gap
In 3.1, the abrasion that plunger 1 and the rigid duct 3 that works directly are contacted, avoided between plunger 1 and working cylinder duct 3 is avoided；Into
The one end in working cylinder duct 3 is arranged in lubricating oil check valve 7；Free-piston 4 is close into lubricating oil in working cylinder duct 3
One end of check valve 7, free-piston 4 are slidably matched with working cylinder duct 3 in accurate, the annular microgap being slidably matched
5.4 be 0.0015~0.0025 millimeter, free-piston 4 is suspended in working cylinder duct 3 by the lubricating oil in annular microgap 5.4
Interior, free-piston 4 can slide in working cylinder duct 3；As shown in the face the A-A figure in attached drawing 1 and figure, into liquid non-return valve 11
It is arranged on the pump housing 2 and is protruded into pump chamber 3.1 from the outside of the pump housing 2；Liquid non-return valve 13 is arranged on the pump housing 2 from the pump housing 2 out
The other side is protruded into pump chamber 3.1；Free-piston 4 is separated into working cylinder duct 3, by working cylinder duct 3 by piston 4
One end and plunger 1 between 4 other end of pump chamber 3.1 and free-piston lubricant reservoir 5.1；One end of oil duct 6.1 and lubrication
The connection of oil pocket 5.1, the other end are connected to annular lubricant oil groove 6.Drill the technique aperture left when to close processing oil duct 6.1,
The first technique hole plug 17 and the second technique hole plug 18 are provided in technique work mouth；One end of pump chamber 3.1 and free-piston 4
It is connected, the other end of free-piston 4 is connected to through lubricant reservoir 5.1, oil duct 6.1 with annular lubricant oil groove 6.
As shown in attached drawing 1, attached drawing 2, attached drawing 3, annular lubricant oil groove 6 on the hole wall in working cylinder duct 3 is set by column
Annular microgap between plug 1 and working cylinder duct 3 separates are as follows: the upper plug of pump chamber 3.1 is upwardly into from annular lubricant oil groove 6
Annular microgap 9, from annular lubricant oil groove 6 to the lower plunger ring shape microgap 10 down toward 3 lower end of working cylinder duct.
Lubricating oil is filled in lubricant reservoir 5.1, oil duct 6.1 and belt oil-way 6 when group armored pump, in pump chamber 3.1
Fill the liquid to be pumped.
As shown in Fig. 2, superhigh pressure liquid pressure during 1 uplink pump liquid of plunger in pump chamber 3.1 is through freedom
Piston 4 is transmitted to lubricant reservoir 5.1, then through keeping upper prop in lubricant reservoir 5.1, oil duct 6.1 pressure transmission to annular lubricant oil groove 6
Lubrication pressure P in the annular lubricant oil groove 6 of 9 lower end of plug ring shape microgapR1With the fluid pressure P in the pump chamber 3.1 of upper endK1
It is equal, i.e. PR1=PK1, therefore effectively prevent in the course of work of 1 uplink pump liquid of plunger the superelevation in pump chamber 3.1
Press liquid enters upper plug annular microgap 9, effectively prevents the leakage of superhigh pressure liquid；A-A sectional view institute as shown in figure 1
Show, the superhigh pressure liquid in pump chamber 3.1 presses off out liquid check valve 13, through going out the highly pressurised liquid interface tube 14 of liquid non-return valve 13
Flow into high-pressure fluid line；Lubricating oil viscosity in annular lubricant oil groove 6 increases with the viscosity that increases of pressure, due to lower plunger
Annular microgap 10 is to the throttling action of thick oil, and only a small amount of lubricating oil is from annular lubricant oil groove 6 through lower plunger ring
Shape microgap 10, which is released, flows back to grease-box, and at the same time, the highly pressurised liquid in pump chamber 3.1 pushes free-piston 4 to squeeze lubrication
Lubricating oil in oil pocket 5.1 enters annular lubricant oil groove 6 through oil duct 6.1, supplements the profit leaked from lower plunger ring shape microgap 10
Lubricating oil keeps the lubricating oil pressure P in annular oil-way 6R1With the fluid pressure P in pump chamber 3.1K1It is equal, i.e. holding PR1
=PK1, effectively prevent the super-pressure low-viscosity (mobile) liquid in pump chamber 3.1 to enter during 1 uplink pump liquid of plunger upper
Plunger annular microgap 9 realizes the sealing to the super-pressure low-viscosity (mobile) liquid in pump chamber 3.1, effectively overcomes super-pressure
Fluid leakage problems, to ensure that the pressure of plunger pump pumping low-viscosity (mobile) liquid reaches 2500bar or more；Lower plunger ring
Plunger 1 is suspended in working cylinder duct 3 by the thick oil in shape microgap 10, avoids surface and the work of plunger 1
The direct contact of the matching surface in cylinder holes road 3, is effectively guaranteed the lubrication of plunger 1, ensure that the functional reliability of plunger 1
With the service life with length.
When plunger 1 goes upward to top dead centre, liquid non-return valve 13 is closed out, pumping liquid process terminates.
As shown in the A-A sectional view in attached drawing 3 and attached drawing 3, the negative pressure P that is generated in pump chamber 3.1 when 1 downlink of plungerK2Through certainly
Lubricant reservoir 5.1 is passed to by piston 4, the pressure in lubricating oil pipe is that the low pressure lubricating oil of 4bar is pressed off through lubricating oil pipe interface 8
Lubricant reservoir 5.1 is flowed into lubricating oil check valve 7, free-piston 4 comes downwards to contact into liquid non-return valve 11 and stops downlink, profit
Lubricating oil, lubricating oil pressure P are full of in lubricating cavity 5.1R2≤ 4bar, the lubrication being connected through oil duct 6.1 with lubricant reservoir 5.1
Lubricating oil pressure P in oil groove 6R2≤4bar；By negative pressure P in pump chamber 3.1K2Effect, the pressure in fluid pipeline is 1bar
Working fluid through feed liquor body interface tube 12 press off into liquid non-return valve 11 flow into pump chamber 3.1,1 downlink of plunger suck work
Fluid pressure P during liquid in pump chamber 3.1K2, PK2≤ 1bar, PK2>=0bar, i.e. 1bar >=PK2>=0bar, in plunger 1
Lubricating oil pressure P during downlink sucking working solution in annular lubricant oil groove 6R2(PR2≤ 4bar) with pump chamber 3.1 in
Liquid pressure PK2(1bar≥PK2>=0bar) pressure difference is less than 4bar, and (test proves that the pressure difference of annular minim gap both ends liquid is small
There is no liquid flow phenomenon in annular minim gap when 10bar), during 1 downlink of plunger sucks working solution also effectively
Ground prevents the leakage of pumped liquid, and when plunger 1 comes downwards to lower dead center, feed liquor check valve 11 is closed, the sucking of 1 downlink of plunger
The process of liquid terminates；Initial state is returned to, plunger 1 repeats uplink pumping liquid, downlink sucks the worked of working fluid
Journey.
The sealing lubrication structure of the plunger pump, in the work of 1 uplink of plunger pumping liquid and 1 downlink of plunger sucking liquid
It effectively prevents the low-viscosity (mobile) liquid in pump chamber 3.1 to enter upper plug annular microgap 9 in the process, effectively overcomes super
High-pressure plunger pumps the leakage problem of low viscosity degree liquid, to ensure that a kind of sealing lubrication structure pumping of plunger pump is low
Viscous liquid pressure reaches 2500bar or more and leaks without low-viscosity (mobile) liquid；Lubricating oil film in lower plunger ring shape microgap 10 makes
Plunger 1 floats in working cylinder duct 3, avoids plunger 1 and directly contacts with working cylinder duct 3, effectively overcomes plunger 1
With the wear failure problem in working cylinder duct 3, functional reliability and working life are improved.
Finally, it should be noted that the above various embodiments is only used to illustrate the technical scheme of the present invention, rather than its limitations；
Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its
It is still possible to modify the technical solutions described in the foregoing embodiments, or special to some or all of technologies
Sign is equivalently replaced；And these are modified or replaceed, various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (1)
1. a kind of sealing lubrication structure of plunger pump, including plunger (1), the pump housing (2), working cylinder duct (3), pump chamber (3.1), from
By piston (4), annular lubricant oil groove (6), oil duct (6.1), into liquid non-return valve (11), go out liquid non-return valve (13) and into lubrication
Oily check valve (7), it is characterised in that: the free-piston (4) separates in working cylinder duct (3), by working cylinder duct (3)
Lubricant reservoir (5.1) as pump chamber (3.1) and free-piston (4) other end between one end and plunger by piston (4)；Oil
The one end in road (6.1) is connected to lubricant reservoir (5.1), the other end is connected to annular lubricant oil groove (6).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910046129.9A CN109695566A (en) | 2019-01-18 | 2019-01-18 | A kind of sealing lubrication structure of plunger pump |
| PCT/CN2019/096073 WO2020147278A1 (en) | 2019-01-18 | 2019-07-16 | Sealing and lubricating structure for plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910046129.9A CN109695566A (en) | 2019-01-18 | 2019-01-18 | A kind of sealing lubrication structure of plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109695566A true CN109695566A (en) | 2019-04-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910046129.9A Pending CN109695566A (en) | 2019-01-18 | 2019-01-18 | A kind of sealing lubrication structure of plunger pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109695566A (en) |
| WO (1) | WO2020147278A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140589A (en) * | 2019-12-29 | 2020-05-12 | 陕西航天动力高科技股份有限公司 | Lubricating structure of crosshead assembly for diaphragm pump |
| WO2020147278A1 (en) * | 2019-01-18 | 2020-07-23 | 郑国璋 | Sealing and lubricating structure for plunger pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968017A (en) * | 2010-10-29 | 2011-02-09 | 郑国璋 | Low pressure difference hydraulic sealing type high-pressure common-rail fuel pump |
| CN103443440A (en) * | 2011-01-31 | 2013-12-11 | 大陆汽车有限公司 | Pump unit for a high-pressure pump |
| CN106015581A (en) * | 2016-04-09 | 2016-10-12 | 侯宝旺 | Novel hydraulic sealing method |
| CN108412652A (en) * | 2018-05-07 | 2018-08-17 | 郑国璋 | A kind of diesel engine pluralities of fuel oil spout pump configuration |
| CN108533430A (en) * | 2018-05-07 | 2018-09-14 | 梁跃中 | A kind of diesel engine super-pressure vehicle fuel pump structure |
| CN109209710A (en) * | 2018-11-14 | 2019-01-15 | 上海华羿汽车系统集成有限公司 | A kind of plunger fuel injector and internal combustion engine |
| CN109209713A (en) * | 2018-11-14 | 2019-01-15 | 上海华羿汽车系统集成有限公司 | A kind of plunger device and internal combustion engine |
| CN209800241U (en) * | 2019-01-18 | 2019-12-17 | 郑国璋 | Sealing and lubricating structure of low-viscosity liquid plunger pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPN20000066A1 (en) * | 2000-10-20 | 2002-04-20 | Wartsila Nsd Italia Spa | POWER SUPPLIES PERFECTED IN DIESEL ENGINES NAMED "COMMON RAIL" |
| CN109695566A (en) * | 2019-01-18 | 2019-04-30 | 郑国璋 | A kind of sealing lubrication structure of plunger pump |
-
2019
- 2019-01-18 CN CN201910046129.9A patent/CN109695566A/en active Pending
- 2019-07-16 WO PCT/CN2019/096073 patent/WO2020147278A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968017A (en) * | 2010-10-29 | 2011-02-09 | 郑国璋 | Low pressure difference hydraulic sealing type high-pressure common-rail fuel pump |
| CN103443440A (en) * | 2011-01-31 | 2013-12-11 | 大陆汽车有限公司 | Pump unit for a high-pressure pump |
| CN106015581A (en) * | 2016-04-09 | 2016-10-12 | 侯宝旺 | Novel hydraulic sealing method |
| CN108412652A (en) * | 2018-05-07 | 2018-08-17 | 郑国璋 | A kind of diesel engine pluralities of fuel oil spout pump configuration |
| CN108533430A (en) * | 2018-05-07 | 2018-09-14 | 梁跃中 | A kind of diesel engine super-pressure vehicle fuel pump structure |
| CN109209710A (en) * | 2018-11-14 | 2019-01-15 | 上海华羿汽车系统集成有限公司 | A kind of plunger fuel injector and internal combustion engine |
| CN109209713A (en) * | 2018-11-14 | 2019-01-15 | 上海华羿汽车系统集成有限公司 | A kind of plunger device and internal combustion engine |
| CN209800241U (en) * | 2019-01-18 | 2019-12-17 | 郑国璋 | Sealing and lubricating structure of low-viscosity liquid plunger pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020147278A1 (en) * | 2019-01-18 | 2020-07-23 | 郑国璋 | Sealing and lubricating structure for plunger pump |
| CN111140589A (en) * | 2019-12-29 | 2020-05-12 | 陕西航天动力高科技股份有限公司 | Lubricating structure of crosshead assembly for diaphragm pump |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020147278A1 (en) | 2020-07-23 |
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