CN205638755U - Isobaric injection pump of mechanical type - Google Patents
Isobaric injection pump of mechanical type Download PDFInfo
- Publication number
- CN205638755U CN205638755U CN201620491459.0U CN201620491459U CN205638755U CN 205638755 U CN205638755 U CN 205638755U CN 201620491459 U CN201620491459 U CN 201620491459U CN 205638755 U CN205638755 U CN 205638755U
- Authority
- CN
- China
- Prior art keywords
- plunger
- oil
- injection pump
- fuel
- pump housing
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model provides an isobaric injection pump of mechanical type, include the oil spout pump body, plunger matching parts, delivery valve subassembly, rack adjusting mechanism, go up spring holder, lower spring holder, plunger spring and guide piston subassembly. Lower design formula as an organic whole of its plunger bushing and delivery valve reduces fitting surface and pressurization face number, has strengthened the reliability of plunger bushing. Plunger matching parts adopts the installation of shoulder blade formula, guarantees high pressure region's intensity, effectively prevents the mesopore compressive deformation, is equipped with multichannel lubricating oil hole on the oil spout pump body, reduces the relevant pipeline of diesel engine for diesel engine construction compactness more. This isobaric injection pump is arranged in a supporting four -stroke -cycle, directly spouts formula, exhaust turbine pressure boost, cold, irreversible in -line arrangement marine diesel, satisfies this type of diesel engine rated revolution and is 900~1200rmin, and single cylinder rated power is 170~210kW, and the cylinder diameter is the requirement that 200~ phi of phi 250mm, stroke are 310~360mm.
Description
Technical field
This utility model belongs to oil injection pump of marine diesel engine technical field, relates to the constant-pressure oil injection pump of diesel engine.
Background technology
Injection pump is the fueller of diesel engine, and for mechanical cam formula diesel engine, injection pump is normally mounted on diesel engine cam case, the reciprocating motion of the rotational band action-oriented piston component of camshaft, thus drives the up and down motion of plunger, to realize fuel feeding.By pulling tooth bar, make gear ring rotary motion, thus drive plunger to rotate, by plunger helix Precise Control of Oil amount, with the oil mass requirement under satisfied different operating modes.
Along with diesel engine functional design is gradually improved, developed at present four strokes, direct injection, exhaust gas turbocharge, in in-line arrangement marine diesel cold, irreversible, the rated speed of this diesel engine is 900～1200r/min, single cylinder rated power is 170～210kW, cylinder diameter is φ 200～φ 250mm, stroke is 310～360mm, and existing constant-pressure oil injection pump can not meet its fuel feeding requirement.
Utility model content
The purpose of this utility model is that in order to meet diesel engine rated speed be 900～1200r/min, and single cylinder rated power is 170～210kW, the requirement that cylinder diameter is φ 200～φ 250mm, stroke is 310～360mm, and provides a kind of mechanical equal-pressure oil injection pump.
The technical solution of the utility model is as follows:
A kind of mechanical equal-pressure oil injection pump, including fuel injection pump housing and installation plunger matching parts, oil outlet valve component, tooth bar governor motion, upper spring disk, lower spring cup, plunger spring and guide piston assembly within it.
Wherein, oil outlet valve component includes the delivery valve seat of honour, fuel-displaced lower valve seat and is separately mounted to the delivery valve seat of honour and the air relief valve in decompression valve pocket that fuel-displaced lower valve seat is collectively forming and fuel-displaced valve pocket and pressure-relief valve spring, delivery valve and oil outlet valve spring.
Described plunger matching parts includes plunger bushing and plunger, they are arranged in the pump housing, plunger bushing and fuel-displaced lower valve seat are designed as integral type, plunger bushing upper end also serves as fuel-displaced lower valve seat, and be omoplate formula structure, hang over pump housing upper end, the delivery valve seat of honour and plunger bushing, to carry out compressing and high pressure sealing by strongly screw in compression on the pump housing；The bottom of plunger passes gear ring, gear ring and tooth bar and coordinates pilot plunger helix to regulate fuel feeding；Plunger spring is enclosed within plunger, and plunger spring upper end props up upper spring disk, and lower end connects lump and guide piston assembly against lower spring cup, lower spring cup lower end.
Described fuel injection pump housing is provided with multiple tracks lubrication hole, wherein middle part is provided with lubricating oil entrance, pump housing wall is provided with the pump housing grease way extended up and down, lubricating oil enters in pump housing grease way from lubricating oil porch, middle part, connect up plunger bushing grease way, lubrication plunger matching parts, connects downwards guide piston lubricating oil duct, lubricates its spigot surface and idler wheel surface.
Three road annular grooves it are designed with on described plunger bushing inwall, lower end twice annular groove connects lubricating oil oil input channel and lubricating oil return road, forms lubricating oil loop, it is ensured that sufficient lubrication plunger matching parts in motor process, one, upper end annular groove connects return flow oil road, forces oil return to prevent fuel blow.
Described diameter of plunger is Φ 22～Φ 26mm, and lift is 24～28mm, delivery valve diameter phi 14mm, and delivery valve opening pressure is 0.9MPa～1.4Mpa, air relief valve diameter phi 11.5mm, and decompression valve opening pressure is 13.7MPa～15.2MPa.
Described injection pump contour structures be top be cylindrical band boss, middle part is four square flanges, and bottom is cylinder, and fuel oil enters, in the superposed same boss face of spill port, conveniently enters, the connection of oil return pipe.
Being provided with a pair corrosion protection screw in the both sides, top of fuel injection pump housing, the head of corrosion protection screw extend in plunger bushing oil inlet and oil return hole, alleviates the erosion to the pump housing of the plunger cavity inner high voltage fuel oil, extends the service life of injection pump.
Advantage of the present utility model is as follows:
1, plunger bushing and fuel-displaced lower valve seat are designed as integral type, decrease the number of cooperation face and high pressure sealing face, simplified procedure of processing and cycle, enhance the reliability of plunger bushing simultaneously.
2, the mode using strength screw in compression connects oil outlet valve component and plunger matching parts, effectively realizes fastening and the high pressure sealing of part.
3, plunger matching parts uses omoplate formula to install, and by strength screw in compression on the pump housing, it is ensured that the intensity of high-pressure area, effectively prevents mesopore compressive deformation.
4, custom-designed 3 road annular grooves on plunger bushing, connect return flow oil road, lubricating oil oil input channel, lubricating oil return road, it is ensured that sufficient lubrication plunger matching parts in motor process respectively, and force oil return to prevent fuel blow.
5, fuel injection pump housing is provided with multiple tracks lubrication hole, upwards lubricate plunger matching parts, lubrication spigot surface and idler wheel surface, decrease abrasion, enhance radiating effect downwards, simultaneously by different for lubrication local branch lines, being integrated on the pump housing, diesel engine has only to provide the interface of a lubricating oil oil-feed, simplifies the lubricating oil pipeline of diesel engine, make engine block the compactest, attractive in appearance, also simplify the assembling of diesel engine.
6, injection pump profile population structure rule, fuel oil oil inlet and oil return hole is positioned in same boss face, compact conformation, conveniently enters, the connection of oil return pipe.
Accompanying drawing explanation
Figure 1A and Figure 1B is this injection pump section of structure；
Fig. 2 is plunger matching parts and oil outlet valve component section of structure；
Fig. 3 is plunger matching parts section of structure；
Fig. 4 is injection pump assembly outline drawing.
Detailed description of the invention
This technology is further described below in conjunction with accompanying drawing.
Seeing Figure 1A and Figure 1B, this injection pump includes: fuel injection pump housing 3, plunger matching parts and oil outlet valve component 2, the tooth bar governor motion being made up of tooth bar 5 and gear ring 6, upper spring disk 7, lower spring cup 10, plunger spring 8, guide piston assembly 11 etc..Plunger matching parts and oil outlet valve component 2 are pressed on fuel injection pump housing 3 by plunger bushing pump housing attachment screw 1, a pair corrosion protection screw 4 is installed on fuel injection pump housing 3, the head of corrosion protection screw extend in plunger bushing oil inlet and oil return hole 257, to alleviate the erosion to the pump housing of the plunger cavity inner high voltage fuel oil, extend the service life of injection pump.The bottom of plunger coordinates through gear ring 6 with plunger spring and lower spring cup, and gear ring 6 and tooth bar 5 coordinate pilot plunger helix to regulate fuel feeding.Plunger spring upper end props up upper spring disk, and lower end is against lower spring cup.Lower spring cup is simultaneously connected with lump 9 and guide piston assembly 11.
Fuel injection pump housing 3 is provided with multiple tracks lubricating oil duct, wherein middle part is provided with lubricating oil entrance 31, pump housing wall is provided with the pump housing grease way 32 extended up and down, lubricating oil enters in pump housing grease way from lubricating oil porch, middle part, connect up plunger bushing lubricating oil oil input channel 254, lubrication plunger matching parts, through plunger bushing lubricating oil back oil road 255, returns to pump housing lubricating oil oil return opening 35；Connect downwards guide piston lubricating oil duct 111, lubricate its spigot surface and idler wheel surface.Thus can reduce abrasion, strengthen radiating effect, and reduce the associated pipe of diesel engine so that engine block is the compactest.
Visible in conjunction with Fig. 2, injection pump is that the mode using strength screw in compression connects oil outlet valve component and plunger matching parts 25, and oil outlet valve component includes the delivery valve seat of honour 22, fuel-displaced lower valve seat and is separately mounted to the delivery valve seat of honour and the air relief valve 23 in decompression valve pocket that fuel-displaced lower valve seat is collectively forming and fuel-displaced valve pocket and pressure-relief valve spring 24, delivery valve 26 and oil outlet valve spring 27.The plunger bushing of plunger matching parts 25 and fuel-displaced lower valve seat are designed as integral type, are tightened by strength delivery valve seat plunger bushing screw 21 and delivery valve seat 22, thus realize fastening and the high pressure sealing of part.In delivery stroke, oil pressure in pump chamber raises, and during more than the unlatching pressure of delivery valve 26, delivery valve overcomes the spring force of oil outlet valve spring 27 to lift, and the hydraulic oil in pump chamber is by high-pressure oil duct press-in high-pressure oil pipe.After fuel feeding terminates, pump chamber becomes low pressure chamber, and the hydraulic oil in high-pressure oil pipe reversely flows into low pressure chamber through high-pressure oil duct.After hydraulic oil is less than a certain setting numerical value, delivery valve 26 cuts out.If the oil pressure in high pressure chest due to pressure wave transmission with superpose sum higher than air relief valve 23 open pressure time, then air relief valve overcomes the thrust of pressure-relief valve spring 24 to lift, hydraulic oil entrance low pressure chamber, the oil pressure in high-pressure oil duct obtains pressure release, each cylinder oil pressure balance.
Seeing Fig. 3, plunger matching parts 25 uses omoplate formula to install, i.e. plunger bushing 251 upper end also serves as fuel-displaced lower valve seat, for omoplate formula structure, hangs over fuel injection pump housing 3 upper end, by strength screw in compression on the pump housing, it is ensured that the intensity of high-pressure area, effectively prevents mesopore compressive deformation.It is designed with three road annular grooves 253 on plunger bushing 251, connects return flow oil road 256, lubricating oil oil input channel 254 and lubricating oil return road 255 respectively.Lower end twice annular groove connects lubricating oil oil input channel and lubricating oil return road, forms lubricating oil loop, it is ensured that sufficient lubrication plunger matching parts in motor process, and one, upper end annular groove connects return flow oil road, forces oil return to prevent fuel blow.
See Fig. 4, injection pump contour structures be top be cylindrical band boss, middle part is four square flanges, and bottom is cylinder, population structure rule.Fuel oil fuel feed hole 33, spill port 34 are positioned in same boss face, compact conformation, conveniently enter, the connection of oil return pipe.
The diameter of plunger of this injection pump is Φ 22～Φ 26mm, and lift is 24～28mm.Delivery valve diameter phi 14mm, delivery valve opening pressure is 0.9MPa～1.4MPa；Air relief valve diameter phi 11.5mm, decompression valve opening pressure is 13.7MPa～15.2MPa.
The assembly method of this constant-pressure oil injection pump is as follows: fuel injection pump housing 3 is contained on special fixture locking, and the pump housing is upwards.Plunger matching parts and oil outlet valve component 2 being taken apart, plunger bushing 252 therein assembles in sealing ring press-in fuel injection pump housing 3, is pressed onto the end.Being screwed into plunger bushing pump housing attachment screw 1, then delivery valve 26, oil outlet valve spring 27, pressure-relief valve spring 24, air relief valve 23 are loaded plunger bushing 252, fit on delivery valve seat 22 is also tightened with delivery valve seat plunger bushing attachment screw 21.Tooth bar 5 is loaded in the rack bore of fuel injection pump housing.Subsequently the pump housing is overturn 180 ° so that it is seating plane is upward.Gear ring 6 is loaded in fuel injection pump housing.It is sequentially placed into upper spring disk 7, plunger spring 8.The afterbody of plunger 252 is put in lower spring cup 10, with soket head cap screw, lump 9 and lower spring cup is fastened on guide piston, plunger, lump, lower spring cup are put in the pump housing together with guide piston assembly 11.Guide finger 12 is loaded in guide pin hole.Two corrosion protection screws 4 are screwed in two screwed holes on pump housing top respectively.
Claims (3)
1. a mechanical equal-pressure oil injection pump, including fuel injection pump housing and installation plunger matching parts, oil outlet valve component, tooth bar governor motion, upper spring disk, lower spring cup, plunger spring and guide piston assembly within it；It is characterized in that, described oil outlet valve component includes the delivery valve seat of honour, fuel-displaced lower valve seat and is separately mounted to the delivery valve seat of honour and the air relief valve in decompression valve pocket that fuel-displaced lower valve seat is collectively forming and fuel-displaced valve pocket and pressure-relief valve spring, delivery valve and oil outlet valve spring；
Described plunger matching parts includes plunger bushing and plunger, they are arranged in fuel injection pump housing, plunger bushing and fuel-displaced lower valve seat are designed as integral type, plunger bushing upper end also serves as fuel-displaced lower valve seat, and be omoplate formula structure, hang over fuel injection pump housing upper end, the delivery valve seat of honour and plunger bushing, to carry out compressing and high pressure sealing by strongly screw in compression on the pump housing；The bottom of plunger passes gear ring, gear ring and tooth bar and coordinates pilot plunger helix to regulate fuel feeding；Plunger spring is enclosed within plunger, and plunger spring upper end props up upper spring disk, and lower end connects lump and guide piston assembly against lower spring cup, lower spring cup lower end；
Lubricating oil entrance it is provided with in the middle part of fuel injection pump housing, pump housing wall is provided with the pump housing grease way extended up and down, lubricating oil enters in pump housing grease way from lubricating oil porch, middle part, connect up plunger bushing grease way, lubrication plunger matching parts, connect downwards guide piston lubricating oil duct, lubricate its spigot surface and idler wheel surface；
3 road annular grooves it are designed with on described plunger bushing inwall, road, lower end 2 annular groove connects lubricating oil oil input channel and lubricating oil return road, forms lubricating oil loop, it is ensured that sufficient lubrication plunger matching parts in motor process, road, upper end 1 annular groove connects return flow oil road, forces oil return to prevent fuel blow；
Described diameter of plunger is Φ 22～Φ 26mm, and lift is 24～28mm, delivery valve diameter phi 14mm, and delivery valve opening pressure is 0.9MPa～1.4Mpa, air relief valve diameter phi 11.5mm, and decompression valve opening pressure is 13.7MPa～15.2MPa.
Mechanical equal-pressure oil injection pump the most according to claim 1, it is characterised in that described injection pump contour structures be top be cylindrical band boss, middle part is four square flanges, and bottom is cylinder, and fuel oil enters, in the superposed same boss face of spill port.
Mechanical equal-pressure oil injection pump the most according to claim 1, it is characterised in that be provided with a pair corrosion protection screw in the both sides, top of fuel injection pump housing, the head of corrosion protection screw extend in plunger bushing oil inlet and oil return hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CU2017000002U CU20170002U (en) | 2016-05-26 | 2015-07-07 | MECHANICAL TYPE CONSTANT PRESSURE FUEL INJECTION PUMP |
| CN201620491459.0U CN205638755U (en) | 2016-05-26 | 2016-05-26 | Isobaric injection pump of mechanical type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620491459.0U CN205638755U (en) | 2016-05-26 | 2016-05-26 | Isobaric injection pump of mechanical type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205638755U true CN205638755U (en) | 2016-10-12 |
Family
ID=57053044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620491459.0U Active CN205638755U (en) | 2016-05-26 | 2016-05-26 | Isobaric injection pump of mechanical type |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN205638755U (en) |
| CU (1) | CU20170002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593729A (en) * | 2016-12-27 | 2017-04-26 | 南岳电控（衡阳）工业技术股份有限公司 | Inner leakage prevention structure of monoblock pump and monoblock pump provided with same |
| CN114278476A (en) * | 2022-01-07 | 2022-04-05 | 龙口龙泵柴油喷射高科有限公司 | High-pressure oil supply pump oil system assembly of large-flow electronic control common rail system |
-
2015
- 2015-07-07 CU CU2017000002U patent/CU20170002U/en unknown
-
2016
- 2016-05-26 CN CN201620491459.0U patent/CN205638755U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593729A (en) * | 2016-12-27 | 2017-04-26 | 南岳电控（衡阳）工业技术股份有限公司 | Inner leakage prevention structure of monoblock pump and monoblock pump provided with same |
| CN114278476A (en) * | 2022-01-07 | 2022-04-05 | 龙口龙泵柴油喷射高科有限公司 | High-pressure oil supply pump oil system assembly of large-flow electronic control common rail system |
| CN114278476B (en) * | 2022-01-07 | 2023-12-01 | 龙口龙泵柴油喷射高科有限公司 | High-pressure oil supply pump oil system component of high-flow electric control common rail system |
Also Published As
| Publication number | Publication date |
|---|---|
| CU20170002U (en) | 2018-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103089507B (en) | Double-row six-cylinder radial type common-rail oil feed pump | |
| CN104160141A (en) | Pump head for a fuel pump | |
| CN103228876A (en) | Rocker shaft pedestal incorporating an engine valve actuation system or engine brake | |
| CN105134440B (en) | Use for diesel engine improves the high-pressure fuel injection pump assembly of structure single cylinder | |
| CN205638755U (en) | Isobaric injection pump of mechanical type | |
| CN110748446A (en) | Common rail high-pressure oil inlet and outlet valve assembly and common rail high-pressure oil supply pump | |
| CN209163980U (en) | A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly | |
| CN106121889A (en) | High Enhanced diesel engine constant-pressure oil injection pump | |
| CN216642439U (en) | High-pressure reciprocating pump with multi-cylinder structure | |
| CN109253004A (en) | A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly | |
| CN201050390Y (en) | Integral diesel engine oil pump | |
| CN201810438U (en) | Constant-pressure oil injection pump of diesel | |
| CN205638756U (en) | Isopiestic pressure oil injection pump | |
| CN205001096U (en) | Monoblock pump assembly for single cylinder diesel | |
| CN201363217Y (en) | Mechanical equal-pressure oil injection pump used for diesel engine | |
| CN204921227U (en) | Diesel engine is with improving structure single cylinder high -pressure oil pump assembly | |
| CN214577478U (en) | Lightweight large-flow oil valve plunger assembly and high-pressure oil pump | |
| CN205918532U (en) | High isobaric injection pump of type of strengthening | |
| CN204371661U (en) | A kind of use for diesel engine high-pressure common rail inline pump machine | |
| CN103527377B (en) | A kind of Multifunctional valve for common rail system | |
| CN202338430U (en) | Plunger type single oil feed pump | |
| CN111664071A (en) | Parallel double-connecting-rod two-stage high-sealing high-pressure pump | |
| CN202560415U (en) | Improved fuel injection pump assembly | |
| CN212774567U (en) | Electric control unit pump | |
| CN205190097U (en) | Diesel engine fuel injection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |