CN101694194B - Plunger couple of oil injection pump of high-power diesel engine - Google Patents
Plunger couple of oil injection pump of high-power diesel engine Download PDFInfo
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- CN101694194B CN101694194B CN200910101937A CN200910101937A CN101694194B CN 101694194 B CN101694194 B CN 101694194B CN 200910101937 A CN200910101937 A CN 200910101937A CN 200910101937 A CN200910101937 A CN 200910101937A CN 101694194 B CN101694194 B CN 101694194B
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- sleeve
- plunger
- oil
- hole
- spray orifice
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Abstract
The invention discloses a plunger and barrel assembly of an oil injection pump of a high-power diesel engine. The plunger and barrel assembly comprises a sleeve with oil inlet holes, a plunger matched with the sleeve and a sealing ring on the outer surface of the sleeve, wherein the front part of the sleeve is provided with six first injection holes which are circumferentially arrayed in an arc shape at intervals, and outer hole ports of the first injection holes are provided with grooves; the oil inlet holes are arranged on the middle part of the sleeve and comprise an inner hole, a trumpet-shaped middle hole and an arc outer hole; the tail part of the sleeve is circumferentially and symmetrically provided with four second injection holes, and the tail end of the sleeve is provided with an outer thread used for assembling so as to be convenient for arranging and fixing the sleeve; the sleeve is provided with a hole cavity for arranging the plunger, and a compound nitriding layer is arranged on the inner walls of the hole cavity and the oil inlet holes; the head part at the front end of the plunger is provided with a spiral groove and a straight groove used for controlling the flow; three circumferential annular arc grooves used for storing a proper amount of oil are arranged below the inclined groove and the straight groove, the annular arc grooves are mutually spaced by 15 mm, and each annular arc groove is 1 mm wide and 1 mm deep.
Description
Technical field
The present invention relates to the oil injection pump of marine diesel engine technical field, relate in particular to a kind of plunger and barrel assembly of oil injection pump of high-power diesel engine peculiar to vessel.
Background technique
Injection Pump is the core component of diesel engine, and its major function is to supply with high-pressure diesel to oil sprayer according to certain rules, to obtain good atomization quality.Plunger coupled parts is the secondary precision pair in the Injection Pump; In the course of the work; The total kilometres of plunger are constant; The fuel feeding zero-time is to be controlled by the time that plunger surface covers the sleeve oil inlet hole fully, is confirmed by the distance between plunger end face edge and the spiral chute edge, is promptly controlled by the effective travel of plunger the duration of feeding.Just can change effective travel through rotary plunger, thereby change fuel delivery to adapt to the requirement that diesel load changes.
Existing marine diesel engine plunger coupled parts in use is prone to produce thermal distortion, and plunger is prone to kill, and influences the working life of plunger coupled parts; Plunger coupled parts end face and outlet valve match, and the requirement of end face seal property is high, need usually to grind.The Injection Pump fuel delivery is controlled through the position of rotary plunger adjusting color screw groove.
The application for a patent for invention title: plunger and barrel assembly of oil injection pump of marine diesel engine, number of patent application: 200810063460.3 disclose a kind of plunger and bare of injection pump, comprise plunger, sleeve, first seal ring, oil-scraping device and second seal ring; Wherein: be shaped on three road ring shaped slots of the arrangement of spacing from top to bottom that can store an amount of oil on the plunger back segment outer circumferential face,, prevent to kill between plunger and the sleeve in order to increase lubrication to plunger and sleeve; Barrel forward end is provided with first seal ring and sleeve rear end is provided with second seal ring, in order to guarantee the sealing of Injection Pump low pressure oil pocket; Upper cartridge has the one-level mesopore of fitted seal high pressure oil, with the sealing requirements that can satisfy high pressure oil that cooperates between fuel-displaced device, the seal ring; Barrel forward end portion is provided with the rectangle double thread screw, can rotate cooperation mutually with plunger, comes the fuel delivery of optimization control Injection Pump; The inner chamber of the recessed truncated conical shape of barrel forward end is provided with oil-scraping device, oil-scraping device obvolvent plunger periphery; It is good and have a seal ring that the PTFE material of graphite fiber is processed that oil-scraping device includes " umbrella " shape mechanical seal device and function; Oil-scraping device can scrape off the fuel oil of the aging retrogradation of plunger surface institute adhesion, and sealing function is provided, and keeps cam shaft system lubricating oil cleaning.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to existing technology, and the plunger and barrel assembly of oil injection pump of high-power diesel engine that a kind of fuel feeding is accurate, simple in structure, be prone to manufacturing, good seal performance is provided.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: plunger and barrel assembly of oil injection pump of high-power diesel engine comprises the seal ring of the sleeve that is provided with oil inlet hole, the plunger that matches with sleeve, sleeve outer surface;
The front portion of sleeve is provided with first spray orifice that six circumferential spacing radians in edge are arranged; The diameter of first spray orifice is 9mm to 11mm; Outer aperture at first spray orifice is provided with wide 34mm to 36mm, and a side fillet radius is 14mm to 16mm, and the opposite side fillet radius is the groove of 4mm to 6mm;
Oil inlet hole is arranged on the middle part of sleeve; Outer hole by endoporus, flaring mesopore and circular arc is formed, and endoporus is diameter 3mm to 4mm, the cylindrical hole of long 3mm to 5mm; The horn opening angle of mesopore is 20 °, and outer hole is the circular arc camber of radius 9mm to 11mm;
The afterbody of sleeve circumferentially is symmetrically arranged with four second spray orifices, and the vestibule shaft axis angulation of two second spray orifices wherein is 66 °, and second injection diameter is 9mm to 11mm;
The outside thread that the sleeve tail end is provided for assembling is convenient to install and fix sleeve;
Sleeve is shaped on the vestibule of assembling plunger, at the inwall of vestibule and oil inlet hole one deck nitriding composite bed is set;
Plunger front end head is shaped on the spiral chute and the straight trough of control flow rate, and skewed slot and straight trough below are the annular arc grooves that an amount of oil is stored in three sections circumferential being used to, and in order to increase the lubrication to plunger and sleeve, prevent to kill between plunger and the sleeve; The annular arc groove of each section space 15mm, the wide 1mm of annular arc groove, dark 1mm.
For optimizing technique scheme, the technical measures of taking also comprise:
Plunger diameter is 52mm, and the matching gap of plunger and sleeve is 0.013mm to 0.016mm, and cylindricity is 0.002mm, and surface roughness is Ra0.05 μ m.
Sleeve periphery between second spray orifice and outside thread is set side by side with twice first seal ring, to satisfy the requirement of high pressure sealing.
The barrel forward end periphery is provided with second seal ring.
The sleeve afterbody be provided with the oil duct that leads to sidewall by breech face.
Sleeve is provided with the locating slot of confirming each oil inlet hole, first spray orifice and the second spray orifice position.
Compared with prior art; Accurate, simple in structure, the easy manufacturing of fuel feeding of the present invention, good seal performance; Not only satisfy the requirement of high pressure sealing; And can prevent effectively that plunger and sleeve matching gap heavy fuel oil from leaking and pollution cam shaft system lubricating oil, the seal ring of sleeve afterbody provides the better seal performance; The present invention can reduce the oil consumption and the discharging of diesel engine, satisfies the requirement of marine diesel engine to Injection Pump.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of the sleeve among Fig. 1;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the right elevation of Fig. 2;
Fig. 5 is that the A of Fig. 4 is to sleeve afterbody external thread structure schematic representation;
Fig. 6 is the structural representation of the plunger among Fig. 1;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is that the B-B of Fig. 6 is to view.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is extremely shown in Figure 8 to be structural representation of the present invention.
Reference character wherein is: sleeve 1, oil inlet hole 1a, the first spray orifice 1b, groove 1c, endoporus 1d, mesopore 1e, outer hole 1f, plunger 3, the second spray orifice 1g, nitriding composite bed 10, annular arc groove 11, first seal ring 12, second seal ring 13, oil duct 14, locating slot 15.
As shown in Figure 1, oil injection pump of high-power diesel engine plunger 3 even parts comprise the seal ring of the sleeve 1 that is provided with oil inlet hole 1a, the plunger 3 that matches with sleeve 1, sleeve 1 outer surface.
The front portion of sleeve 1 is provided with the first spray orifice 1b that six circumferential spacing radians in edge are arranged.In the present embodiment, the diameter of the first spray orifice 1b is 10mm, and the 1f mouth is provided with wide 35mm in the outer hole of the first spray orifice 1b, and a side fillet radius is 15mm, and the opposite side fillet radius is the groove 1c of 5mm.
Oil inlet hole 1a is arranged on the middle part of sleeve 1, is made up of the outer hole 1f of endoporus 1d, flaring mesopore 1e and circular arc, and endoporus 1d is diameter 3.7mm, the cylindrical hole of long 4mm.The horn opening angle of mesopore 1e is 20 °, and outer hole 1f is the circular arc camber of radius 10mm.
The afterbody of sleeve 1 circumferentially is symmetrically arranged with four second spray orifice 1g, and the vestibule shaft axis angulation of two second spray orifice 1g wherein is 66 °, and the second spray orifice 1g diameter is 10mm.
The sinistral external thread that sleeve 1 tail end is provided for assembling is convenient to install and fix sleeve 1.
Sleeve 1 is shaped on the vestibule of assembling plunger 3, at the inwall of vestibule and oil inlet hole 1a one deck nitriding composite bed 10 is set.
Plunger 3 front end heads are shaped on the spiral chute and the straight trough of control flow rate, and skewed slot and straight trough below are the annular arc grooves 11 that an amount of oil is stored in three sections circumferential being used to, the annular arc groove 11 space 15mm of each section, annular arc groove 11 wide 1mm, dark 1mm.
Plunger 3 diameters are 52mm, and plunger 3 is 0.013mm to 0.016mm with the matching gap of sleeve 1, and cylindricity is 0.002mm, and surface roughness is Ra0.05 μ m.
Sleeve 1 periphery between the second spray orifice 1g and outside thread is set side by side with twice first seal ring 12 up and down.
Be provided with second seal ring 13 in sleeve 1 front end periphery, satisfy the sealing requirements of high pressure oil.
Sleeve 1 afterbody be provided with the oil duct 14 that leads to sidewall by breech face.
Sleeve 1 is provided with the locating slot 15 of confirming each oil inlet hole 1a, the first spray orifice 1b and the second spray orifice 1g position.
The diameter of plunger 4 is 52mm, and head is milled with spiral chute and straight trough, mainly in order to the control oil mass.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (1)
1. plunger and barrel assembly of oil injection pump of high-power diesel engine comprises it is characterized in that the seal ring of the sleeve (1) that is provided with oil inlet hole (1a), the plunger (3) that matches with sleeve (1), sleeve (1) outer surface:
The front portion of said sleeve (1) is provided with first spray orifice (1b) that six circumferential spacing radians in edge are arranged; The diameter of first spray orifice (1b) is 9mm to 11mm; Outer aperture at first spray orifice (1b) is provided with wide 34mm to 36mm; One side fillet radius is 14mm to 16mm, and the opposite side fillet radius is the groove (1c) of 4mm to 6mm;
Described oil inlet hole (1a) is arranged on the middle part of sleeve (1); Outer hole (1f) by endoporus (1d), flaring mesopore (1e) and circular arc is formed; Endoporus (1d) is diameter 3mm to 4mm, the cylindrical hole of long 3mm to 5mm, and the horn opening angle of said mesopore (1e) is 20
o, said outer hole (1f) is the circular arc camber of radius 9mm to 11mm;
The afterbody of sleeve (1) circumferentially is symmetrically arranged with four second spray orifices (1g), and the vestibule shaft axis angulation of two second spray orifices (1g) wherein is 66
o, second spray orifice (1g) diameter is 9mm to 11mm; Sleeve (1) periphery between second spray orifice (1g) and outside thread is set side by side with twice first seal ring (12);
The outside thread that sleeve (1) tail end is provided for assembling is convenient to install and fix sleeve (1), and sleeve (1) front end periphery is provided with second seal ring (13);
Sleeve (1) is shaped on the vestibule of the said plunger of assembling (3); Inwall at vestibule and oil inlet hole (1a) is provided with one deck nitriding composite bed (10); Sleeve (1) afterbody is provided with the oil duct (14) that is led to sidewall by breech face, and sleeve (1) is provided with the locating slot (15) of confirming each oil inlet hole (1a), first spray orifice (1b) and second spray orifice (1g) position;
Said plunger (3) front end head is shaped on the spiral chute and the straight trough of control flow rate,
Described spiral chuteWith straight trough below be the annular arc groove (11) that an amount of oil is stored in three sections circumferential being used to, the annular arc groove of each section (11) space 15mm, the wide 1mm of annular arc groove (11), dark 1mm; Plunger (3) diameter is 52mm, and plunger (3) is 0.013mm to 0.016mm with the matching gap of sleeve (1), and cylindricity is 0.002mm, and surface roughness is Ra0.05 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910101937A CN101694194B (en) | 2009-08-20 | 2009-08-20 | Plunger couple of oil injection pump of high-power diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910101937A CN101694194B (en) | 2009-08-20 | 2009-08-20 | Plunger couple of oil injection pump of high-power diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101694194A CN101694194A (en) | 2010-04-14 |
| CN101694194B true CN101694194B (en) | 2012-09-05 |
Family
ID=42093182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910101937A Expired - Fee Related CN101694194B (en) | 2009-08-20 | 2009-08-20 | Plunger couple of oil injection pump of high-power diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101694194B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767454A (en) * | 2012-07-13 | 2012-11-07 | 无锡凯奥动力机械有限公司 | Fuel supply advance angle regulation device for fuel injection pump of single-cylinder diesel engine |
| CN109723589A (en) * | 2019-01-17 | 2019-05-07 | 余姚市舒春机械有限公司 | A kind of fueller of adjustable fuel delivery |
| CN109736987A (en) * | 2019-01-17 | 2019-05-10 | 余姚市舒春机械有限公司 | A kind of plunger matching parts with cleaning function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118156A (en) * | 1976-12-01 | 1978-10-03 | Sulzer Brothers Limited | Fuel injection pump having choke means in overflow line |
| CN2205448Y (en) * | 1994-03-04 | 1995-08-16 | 南京油泵油嘴厂 | Plunger coupling part for spraying pump of diesel engine |
| CN2893192Y (en) * | 2006-03-28 | 2007-04-25 | 山东鑫亚工业股份有限公司 | Fuel injection pump plunger coupling parts |
| CN101338718A (en) * | 2008-08-07 | 2009-01-07 | 余姚市舒春机械有限公司 | Plunger unit for injection pump of diesel engine for ship |
-
2009
- 2009-08-20 CN CN200910101937A patent/CN101694194B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118156A (en) * | 1976-12-01 | 1978-10-03 | Sulzer Brothers Limited | Fuel injection pump having choke means in overflow line |
| CN2205448Y (en) * | 1994-03-04 | 1995-08-16 | 南京油泵油嘴厂 | Plunger coupling part for spraying pump of diesel engine |
| CN2893192Y (en) * | 2006-03-28 | 2007-04-25 | 山东鑫亚工业股份有限公司 | Fuel injection pump plunger coupling parts |
| CN101338718A (en) * | 2008-08-07 | 2009-01-07 | 余姚市舒春机械有限公司 | Plunger unit for injection pump of diesel engine for ship |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2004-340052A 2004.12.02 |
| JP特开平6-317233A 1994.11.15 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101694194A (en) | 2010-04-14 |
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Granted publication date: 20120905 Termination date: 20150820 |
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| EXPY | Termination of patent right or utility model |