CN2036210U - Fuel-film atomised-combustion diesel engine protected from cylinder broaching - Google Patents
Fuel-film atomised-combustion diesel engine protected from cylinder broaching Download PDFInfo
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- CN2036210U CN2036210U CN 88218246 CN88218246U CN2036210U CN 2036210 U CN2036210 U CN 2036210U CN 88218246 CN88218246 CN 88218246 CN 88218246 U CN88218246 U CN 88218246U CN 2036210 U CN2036210 U CN 2036210U
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- piston
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Abstract
The utility model belongs to an improvement of a fuel-film atomized-combustion diesel engine, characterized in that the lower part of a burning chamber (1) of a piston crown is additionally provided with a cooling cavity for cooling the piston crown. Moreover, a cyclical oil passage is structurally arranged for transferring oscillating engine oil to the cooling cavity for cooling the piston crown. The acting direction of the open end of a piston air ring (3) is fixedly positioned and mounted. The lower end of a cylinder (11) is provided with a fuel shielding cover (15). In addition, a water cooling system of the original machines is changed to a longitudinal water inlet and lateral flow dividing cooling system with two tubes. By the improvement, the utility model not only can keep the fuel and engine oil saving advantage of the original machines, but also has the well performance of cylinder broaching prevention.
Description
The utility model relates to a kind of internal-combustion piston engine, particularly a kind of improvement of oil film atomizing burn formula diesel engine.
Oil film atomizing burn technology on the diesel engine, belong to a kind of advanced technology abroad, domestic starting in this regard is evening very, up to several years ago, just begins to have developed a kind of 6E150C-ω 7 type oil film atomizing burn formula diesel engines on the basis of 6E150C type diesel engine with direct injection.This diesel engine makes fuel consumption rate obviously descend mainly due to having adopted dark type oil film atomizing toroidal combustion chamber, by 175 original grams/horsepower-hour reduce to 165 grams/horsepower-hour, this is significant beyond doubt to energy-conservation.Yet blemish in an otherwise perfect thing is, because the firing chamber is retrofitted to piston crown from the cylinder head position, thereby make original temperature higher with regard to the temperature of extra high piston crown, this too high temperature, add some defective that the configuration aspects of diesel engine own exists, make and just be present in the scuffing of cylinder bore problem on the general diesel engine originally, on this novel oil film atomizing burn formula diesel engine, seem more outstanding, piston thermal expansion aggravation, heel and toe wear between cylinder inner wall and the piston (comprising piston gas ring) is very serious, influence the functional reliability and the operating life of this diesel engine greatly, hindered applying of this energy-saving diesel engine.
The purpose of this utility model, be at the various concrete reasons that produce pull-cylinder phenomena, a kind of oil film atomizing burn formula diesel engine that solves above-mentioned scuffing of cylinder bore problem is provided, make this diesel engine both save fuel oil and machine oil, can avoid again scuffing of cylinder bore not occurring between piston (comprising piston gas ring) and the cylinder inner wall, thereby improve the operational reliability and the operating life of diesel engine, help applying of this energy-saving diesel engine.
The utility model is realized by following corrective measure.Avoid scuffing of cylinder bore, at first will reduce the temperature of this novel diesel machine piston crown.For this reason, referring to Fig. 1, in the bottom of piston crown near toroidal combustion chamber (1), setting is to the cooling chamber of piston crown heat radiation, supply with the machine oil of cooling chamber with normal temperature continuously by a circuit oil circuit again, by pumping of piston (8), machine oil is vibration up and down in cooling chamber, constantly firing chamber (1) heat is on every side taken away by circuit machine oil, thereby the temperature of piston crown can be reduced.The formation of above-mentioned circulating oil path, can utilize the support oilhole (20), crankshaft oil hole (18), the connecting rod central through bore (14) that just have on the original type, connecting rod small-end bearing outer groove (21), connecting rod small-end bearing annular groove through hole (25), connecting rod copper bar inner groove (6) form the machine oil path of a connection, on this basis oil circuit are extended to cooling chamber again and form circulation to get final product.As for the caused scuffing of cylinder bore of defective of the configuration aspects of two-stroke widely different stream scavenging diesel engine own, what is called " shearing " phenomenon takes place with the sharp edge of suction port that is arranged in the cylinder liner middle and lower part or relief opening and the scuffing of cylinder bore that causes in the acute angle of the opening end of the most outstanding is exactly piston gas ring easily.This is not take location and installation because be arranged in the piston gas ring of piston crown annular groove, along with moving up and down of piston, piston gas ring can rotate in annular groove, when the suction port of the opening end of piston gas ring and cylinder liner or relief opening overlap, be easy to take place " shearing " phenomenon, piston gas ring, piston outer wall and cylinder inner wall are scratched in flakes, and at high ambient temperature, combustion gas is scurried into etc. and to be caused a series of pernicious chain reactions to make piston thermal expansion aggravation under the various factors acting in conjunction and cause scuffing of cylinder bore.Be head it off, the utility model is carried out location and installation with piston gas ring, referring to Fig. 2, promptly be piston gas ring (3) to be fixed on make it in annular groove, not rotate in the piston ring groove, and make when piston gas ring (3) runs to suction port (9) or relief opening (32) position with piston (8), the opening end of each piston gas ring (3) is all avoided suction port (9) and relief opening (32) and facing to the cylinder inner wall between the porting at interval, so just, can make acute angle and the suction port (9) of piston gas ring (3) opening end with relief opening (32) thus sharp edge avoid contacting and can't form " shearing " phenomenon, so eliminate the scuffing of cylinder bore that causes therefrom.Studies have shown that by analysis the last lubricating oil carry-over in the cylinder jacket of diesel engine also is the factor that causes scuffing of cylinder bore.The lubricated of original cylinder wall is to rely on radius bar and a large amount of leakage machine oil in connecting rod bearing shell two ends to be splashed on the casing wall to keep, but over-burden also to cause oil scraper ring thus, draw together unclean, still some machine oil is scurried the air inlet annular groove by red-hot combustion gas institute's carbonization with scurry porting by red-hot exhaust institute carbonization along casing wall, and causes the latency that causes scuffing of cylinder bore therefrom.For this reason, the utility model is in the lower end near cylinder (11), install an oil blocking cover of making of sheet metal (15) (referring to Fig. 1 and Fig. 5), oil blocking cover (15) upper end is the garden tubular to be fixed on cylinder (11) underpart, a straight trough is radially offered to allow connecting rod (13) therefrom pass also activity freely in oil blocking cover (15) center, a downward-sloping oil collecting pipe (35) is respectively stretched out in oil blocking cover (15) both sides, lower end, the machine oil that flows down on cylinder (11) inwall, along oil blocking cover (15) the inner side surface oil collecting pipe (35) of flowing through, machine oil is concentrated to be flow on the non-movement parts main shaft FE Tiler (16) lineally, flow back to crankcase (19) again, can reduce machine oil like this and splash and enter cylinder.The oil that splashes that leaks from connecting rod (13) major part two ends is blocked by oil blocking cover (15), can not enter in the cylinder (11), the machine oil that making splashes enters in the cylinder (11) descends greatly, has both alleviated the burden of oil scraper ring (10), and the lubricating oil carry-over amount is significantly reduced.Facts have proved, the single hole lateral inflow method that water cooling system adopted that several cylinders of former type diesel engine are outer makes that each cylinder water temperature temperature difference is too big, sometimes up to 40 ℃, heat load is unbalanced, and the too high cylinder of the bad temperature of dispelling the heat causes condition to scuffing of cylinder bore again undoubtedly.Therefore, the utility model is transformed water cooling system, promptly change former machine single hole lateral inflow and be cooled to two-tube vertical water inlet, the cooling means of horizontal shunting, its concrete practice can be referring to Fig. 6, the both sides of several cylinders (11) in diesel-engine body (12), respectively insert vertical intake pipe (37) of an endcapped, the head end of these two vertical intake pipes (37) all is connected with water inlet manifold (39), in the side of these two vertical intake pipes (37) by several cylinders (11), from the feed-water end to the end, evenly offer several horizontal tap holes (38), will flow to the cooling water shunting of vertical intake pipe (37).
Former machine makes service behaviour of the present utility model greatly take on a new look through above improvement.Change non-cold piston for circulation machine oil vibration cooling piston, reduced the piston head temperature, the piston first road annular groove temperature is reduced to 216 ℃ by original 247 ℃, makes the piston head temperature field be tending towards reasonable; After piston gas ring is taked directed the installation, not only solved the problem that " shearing " takes place for compression ring mouth and porting, the scuffing of cylinder bore that has caused after having avoided scratching mutually between piston (comprising piston gas ring) and the cylinder sleeve, and after the directed break-in of compression ring, the geometrical shape in garden is coincide better in its outer garden and the cylinder sleeve, help the conduction of heat, strengthened sealing, make consumption rate of fired oil further descended 2.5 the gram/horsepower-hour about, simultaneously because outer garden of compression ring and cylinder sleeve are fitted better the friction durability that has also strengthened compression ring; Cylinder sleeve bottom installation oil blocking cover has stoped on the machine oil scurries, and specific oil consumption also obviously descends; The improvement of cooling water system makes the temperature difference of each cylinder of diesel engine be reduced to below 10 ℃ by about 40 ℃.All these improve, and make the utility model not only keep the energy-conservation advantage of oil film atomizing burn formula diesel engine, and have eliminated the various factors that causes scuffing of cylinder bore, have improved the operational reliability and the operating life of diesel engine, therefore are worthy of popularization.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the concrete structure figure of a cylinder interior of the utility model;
Fig. 2 is that the another kind of cooling chamber of the present utility model and circulating oil path is offered structural drawing;
Fig. 3 is the directed structural drawing of installing of the utility model piston gas ring (3);
Fig. 4 is the amplification assumption diagram of the utility model wrist pin (22) and connecting rod (13) assembled portion;
Fig. 5 is the concrete amplification assumption diagram of the utility model oil blocking cover (15);
Fig. 6 is the structural representation of the utility model cooling water system.
Piston cavity offers in Fig. 1, it is bottom in toroidal combustion chamber (1), offer a bowl-shape outer cooling chamber (2), the central entity part of cooling chamber outside this (2), offer the middle cooling chamber (28) of a garden cylindricality again, have several cooling chamber through holes (26) that are connected between outer cooling chamber (2) and the middle cooling chamber (28) with the circulation cooling machine oil.In Fig. 1, continuing mutually and form the oil circuit that circulating vibrates cools off by cooling chamber to piston crown with former type machine oil path is to constitute like this, offer a horizontal oilhole of wrist pin (24) on wrist pin (22) top, vertical oilhole (23) and two vertical oilholes of wristpin end (5) in the middle part of the wrist pin, wherein the upper end of the vertical oilhole (23) in wrist pin middle part is connected with connecting rod small-end bearing inner groove (6), the other end then is connected with the horizontal oilhole of wrist pin (24), and the lower end of two vertical oilholes of wristpin end (5) is connected with the two ends of the horizontal oilhole of wrist pin (24) respectively; The below of cooling chamber outside piston crown (2) has two vertical oilholes of piston head (4), and its upper end is connected with outer cooling chamber (2) respectively, and the other end then is connected with the upper end of two vertical oilholes of wristpin end (5) respectively; Offer spill port (27) in the below of middle cooling chamber (28), its two ends respectively with the intracavity inter-connection of middle cooling chamber (28) and piston (8).Like this, if the machine oil that extrudes from oil pump injects from support oilhole (20), after the oil circuit that former type is communicated with arrives connecting rod small-end bearing inner groove (6), through the inner chamber of the vertical oilhole (23) in wrist pin middle part, the horizontal oilhole of wrist pin (24), the vertical oilhole of wristpin end (5), the vertical oilhole of piston head (4), outer cooling chamber (2), cooling chamber through hole (26), middle cooling chamber (28), spill port (27) and piston (8), flow back to crankcase (19) at last again to form circulation.Offering of above-mentioned cooling chamber and the oil circuit that continues mutually with former type machine oil path, can also be shown in the structure of Fig. 2, promptly be cooling chamber through hole (26) is enlarged and to make outer cooling chamber (2) and middle cooling chamber (28) be linked to be a chamber, spill port (27) enlarged and make in the middle of cooling chamber (28) directly be communicated with piston (8) inner chamber, open a hole is connected with connecting rod small-end bearing outer groove (21) at the center, top of connecting rod (13), and the oil nozzle (40) of in this connecting rod top center drilling, packing into, like this, the machine oil that enters from support oilhole (20) is after the oil circuit that former type is communicated with arrives connecting rod small-end bearing outer groove (21), directly cooling chamber (2) and middle cooling chamber (28) outside oil nozzle (40) sprays into flow back to crankcase (19) through piston (8) inner chamber again.Referring to Fig. 1 and Fig. 4, in the circulating oil path of supplying with the piston crown cooling chamber, the machine oil of connecting rod small-end bearing inner groove (6) of flowing through is easy to come out along the clearance leakage between the outer wall of the inwall of connecting rod small-end bearing (7) and the wrist pin (22) that socket-connects, in order to reduce this leakage, the utility model is circular groove in the inside, two ends of connecting rod small-end bearing (7) respectively processes a dark and narrow end also, and in these two ends, be respectively charged into the oil seal washer (34) of making opening shape with phosphor-copper in the circular groove, the thickness of oil seal washer (34) is less than the width of circular groove in the end, the external diameter of oil seal washer (34) is less than the external diameter of circular groove in the end, and the inner ring of oil seal washer (34) is a transition fit with cooperating of wrist pin (22) outer wall.Like this, owing to have enough gaps between the circular groove in the end of oil seal washer (34) and connecting rod small-end bearing (7), so after machine oil is full of this gap, can produce certain pressure, two oil seal washers (34) are pushed to the outer end sidewall of circular groove in connecting rod small-end bearing (7) end, prevention machine oil is to external leaks, thereby assurance has enough machine oil to enter outer cooling chamber (2) and middle cooling chamber (28) cools off to form the circulation vibration.Carry out among the directed a kind of embodiment who installs at piston gas ring shown in Figure 3 (3), I, II, the III of down arranging in order from piston (8) upper end, the directed mounting point of the opening end of IV road piston gas ring (3), as the I in the plan view after cuing open, II, III, IV position shown in, obviously the opening end position of this four roads piston gas ring (3) all is to be in the interval between the porting and to avoid suction port (9) and relief opening (32).As for piston gas ring (3) fixing in annular groove, embodiment among Fig. 3 is at the opening end of piston gas ring (3) along piston gas ring radially and be deep into piston (8) inner radial and make a call to the suitable enough pin-and-holes of a degree of depth, make this pin-and-hole center face piston gas ring (3) opening end seam crossing, and in this pin-and-hole, insert a piston gas ring fixing pin (33), can stop piston gas ring (3) to rotate along the annular groove of piston.In this concrete structure of Fig. 5 oil blocking cover (15), opening shape is made on the top that is the garden tubular of oil blocking cover (15), on opening, adorn a bolt and nut fastening piece (36), so that oil blocking cover (15) is the underpart of the top lock ring of garden tubular in cylinder (11) by it.In the cooling water system of Fig. 6, Any shape can be made in the cross section of two vertical intake pipes (37), for the flow that guarantees each horizontal tap hole (38) approaching substantially, to realize that each cylinder heat radiation balance has a narrow range of temperature, can with the aperture of horizontal tap hole (38) longitudinally the feed-water end of intake pipe (37) reduce gradually successively to closed end, also can with the cross sectional area of vertical intake pipe (37) longitudinally intake pipe (37) feed-water end to closed end gradually from large to small.
In the above description, the Reference numeral that is not addressed in accompanying drawing 1 is: (17)---bent axle; (29)---cylinder head; (30)---the cylinder head screw; (31)---fuel injector.
Claims (8)
1, a kind of oil film atomizing burn formula diesel engine of avoiding scuffing of cylinder bore, comprise body (12), cylinder (11), be arranged in the suction port (9) and the relief opening (32) of cylinder (11) cylinder sleeve middle and lower part, piston (8), be positioned at the toroidal combustion chamber (1) of piston (8) head, be loaded on piston gas ring (3) and oil scraper ring (10) in piston (8) annular groove, connecting rod (13), connecting rod small-end bearing (7), wrist pin (22), main shaft FE Tiler (16), crankcase (19), water inlet manifold (39) and by support oilhole (20), crankshaft oil hole (18), connecting rod central through bore (14), connecting rod small-end bearing outer groove (21), connecting rod small-end bearing annular groove through hole (25), the machine oil path that connecting rod small-end bearing inner groove (6) is constituted, feature of the present utility model is:
A, in the bottom of described toroidal combustion chamber (1), the cooling chamber to the piston crown heat radiation is set;
B, have one and continue mutually with described machine oil path and form the oil cooled oil circuit of circulation vibration to piston crown by described cooling chamber;
C, described piston gas ring (3) is fixed on makes it in annular groove, not rotate in the piston ring groove, and make that when piston gas ring (3) runs to suction port (9) or relief opening (32) position with piston (8) the opening end of each piston gas ring (3) is all avoided suction port (9) and relief opening (32) and faced toward cylinder inner wall interval between the porting;
D, in lower end near described cylinder (11), install an oil blocking cover of making of sheet metal (15), oil blocking cover (15) upper end is the garden tubular and is fixed on cylinder (11) underpart, a straight trough is radially offered to allow connecting rod (13) therefrom pass also activity freely in oil blocking cover (15) center, and a downward-sloping oil collecting pipe (35) is respectively stretched out in oil blocking cover (15) both sides, lower end;
E, in described body (12) both sides of several cylinders (11), respectively insert vertical intake pipe (37) of an endcapped, the head end of these two vertical intake pipes (37) all is connected with described water inlet manifold (39), in the side of these two vertical intake pipes (37), from the feed-water end to the end, evenly offer several horizontal tap holes (38) by several cylinders (11).
2, diesel engine according to claim 1 regulation, the cooling chamber that it is characterized in that described toroidal combustion chamber (1) bottom, the middle cooling chamber (28) that comprises a bowl-shape outer cooling chamber (2) and garden cylindricality continues mutually with described machine oil path and forms the oil cooled oil circuit of circulation vibration by cooling chamber to piston crown and comprises the wrist pin middle part vertical oilhole (23) that is connected successively, the horizontal oilhole of wrist pin (24), the vertical oilhole of wristpin end (5), the vertical oilhole of piston head (4), outer cooling chamber (2), cooling chamber through hole (26), middle cooling chamber (28), the inner chamber of spill port (27) and piston (8).
3, the diesel engine of stipulating according to claim 1, the cooling chamber that it is characterized in that described toroidal combustion chamber (1) bottom, be that bowl-shape outer cooling chamber (2) and middle cooling chamber (28) is linked as a chamber, and middle cooling chamber (28) directly is communicated with the inner chamber of piston (8), continue mutually with described machine oil path and all the supercooling chamber form the oil cooled oil circuit of circulation vibration to piston crown, the inner chamber that comprises the oil nozzle (40), cooling chamber (2,28) and the piston (8) that are connected successively.
4, according to claim 1,2,3 diesel engines of stipulating, it is characterized in that, circular groove in the two ends of described connecting rod small-end bearing (7) respectively process a dark and narrow end, and in these two ends, load onto the oil seal washer (34) of making opening shape with phosphor-copper in the circular groove respectively, its thickness is less than the width of circular groove in the end, its external diameter is less than the external diameter of circular groove in the end, and its inner ring is a transition fit with cooperating of wrist pin (22).
5, according to claim 1,2,3 diesel engines of stipulating, it is characterized in that, described piston gas ring (3) fixing in annular groove, be along piston gas ring radially and be deep into piston (8) inner radial and make a call to the suitable enough pin-and-holes of a degree of depth at the opening end of piston gas ring (3), make this pin-and-hole center face piston gas ring (3) opening end seam crossing, in this pin-and-hole, insert a piston gas ring fixing pin (33) then.
6, according to claim 1,2,3 diesel engines of stipulating, opening shape is made on the top that is the garden tubular that it is characterized in that described oil blocking cover (15), on opening, adorn a bolt and nut fastening piece (36), with the underpart of oil blocking cover (15) lock ring in cylinder (11).
7, according to claim 1,2,3 diesel engines of stipulating, the cross section that it is characterized in that described two vertical intake pipes (37) can be made Any shape, and the aperture of described horizontal tap hole (38) the longitudinally feed-water end of intake pipe (37) reduces successively gradually to closed end.
8, according to claim 1,2,3 the regulation diesel engines, it is characterized in that the cross section of described two vertical intake pipes (37) can be made Any shape, and cross sectional area longitudinally intake pipe (37) feed-water end to closed end gradually from large to small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218246 CN2036210U (en) | 1988-08-05 | 1988-08-05 | Fuel-film atomised-combustion diesel engine protected from cylinder broaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218246 CN2036210U (en) | 1988-08-05 | 1988-08-05 | Fuel-film atomised-combustion diesel engine protected from cylinder broaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2036210U true CN2036210U (en) | 1989-04-19 |
Family
ID=4850696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88218246 Withdrawn CN2036210U (en) | 1988-08-05 | 1988-08-05 | Fuel-film atomised-combustion diesel engine protected from cylinder broaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2036210U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734446A (en) * | 2011-04-06 | 2012-10-17 | 沃德(天津)传动有限公司 | Speed reducer and oil blocking cover thereof |
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
-
1988
- 1988-08-05 CN CN 88218246 patent/CN2036210U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734446A (en) * | 2011-04-06 | 2012-10-17 | 沃德(天津)传动有限公司 | Speed reducer and oil blocking cover thereof |
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |