CN201363217Y - Mechanical equal-pressure oil injection pump used for diesel engine - Google Patents
Mechanical equal-pressure oil injection pump used for diesel engine Download PDFInfo
- Publication number
- CN201363217Y CN201363217Y CNU2009201266331U CN200920126633U CN201363217Y CN 201363217 Y CN201363217 Y CN 201363217Y CN U2009201266331 U CNU2009201266331 U CN U2009201266331U CN 200920126633 U CN200920126633 U CN 200920126633U CN 201363217 Y CN201363217 Y CN 201363217Y
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- Prior art keywords
- injection pump
- plunger
- outlet valve
- diesel engine
- pressure
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Abstract
The utility model aims at providing a mechanical equal-pressure oil injection pump used for a diesel engine, which comprises an oil injection pump body with a triangular flange, an equal-pressure oil outlet valve component, a plunger and barrel assembly, a gear ring and rack drive mechanism and a plunger reciprocating motion mechanism; the equal-pressure oil outlet valve component adopts the integrated structural form of an oil outlet valve upper seat, an oil outlet valve lower seat, a delivery connection and a pressing plate; an oil outlet valve adopts the plane sealing-type structure, and a reducing valve adopts the sliding valve sealing-type structure; and the plunger and barrel assembly is positioned and installed in the oil injection pump body in a hanging way by a conical surface at the upper end of a plunger sleeve. The mechanical equal-pressure oil injection pump is applicable to strengthened diesel engines with rated revolution of 720r/min, 750r/min and 900r/min, rated power of single cylinder of 100Kw to 160Kw, cylinder diameter of Phi 200mm and stroke of 300mm, and can improve the work stability thereof, and prolong the service life thereof.
Description
Technical field
The utility model belongs to the diesel engine field, is specifically related to a kind of rated speed 720r/min, 750r/min, 900r/min of being used for, and single cylinder rated power is 100kW～160Kw, and cylinder diameter is φ 200mm, and stroke is the isobaric Injection Pump of the reinforcement diesel engine of 300mm.
Background technique
The reliability of diesel engine work depends on the reliability of Injection Pump work to a great extent.The traditional combustible substance of diesel engine is a diesel oil, and combustible substance is single, in recent years, can burning diesel oil, can become development of diesel trend by combusting heavy oil again, this structural behaviour to diesel injection pump has proposed higher requirement.For rated speed 720r/min, 750r/min, 900r/min, single cylinder rated power is 100kW～160Kw, cylinder diameter is φ 200mm, stroke is the reinforcement diesel engine of 300mm, existing diesel injection pump all can not satisfy its requirement preferably at aspects such as stability and working lifes, has many places that require further improvement.
The model utility content
The purpose of this utility model is to provide a kind of use for diesel engine mechanical type isobaric Injection Pump, at rated speed 720r/min, 750r/min, 900r/min, single cylinder rated power is 100kW～160Kw, cylinder diameter is φ 200mm, stroke is the reinforcement diesel engine practicality of 300mm, improve the stability of its work, life-saving is long.
The technical solution of the utility model is as follows:
The isobaric Injection Pump of use for diesel engine mechanical type comprises fuel injection pump housing, constant pressure delivery valve assembly, plunger coupled parts, bolt, gear ring rack gear and the plunger reciprocating mechanism etc. of being with the triangle flange.
The outlet valve seat of honour of its constant pressure delivery valve assembly, fuel-displaced lower valve seat, delivery connection and pressing plate integral structure form have reduced high pressure sealing face quantity with this, help high pressure sealing.The outlet valve of constant pressure delivery valve assembly adopts plane sealing formula, reduction valve to adopt the guiding valve sealed construction, and the cracking pressure of its outlet valve and the cracking pressure of reduction valve are all adjustable, and outlet valve diameter phi 14mm, delivery valve opening pressure are 1.8MPa～2.0MPa; Reduction valve diameter phi 7mm, the reduction valve cracking pressure is 7.8MPa～8.3MPa; The throttle orifice diameter is φ 1.0～φ 1.2mm.Outlet valve act as the supercharging oil road, and play the partition effect of high-pressure oil duct and low pressure oil duct; Reduction valve act as pressure release oil duct and decompression, also play high pressure and the effect of low pressure oil duct partition.The advantage of this type structure constant pressure delivery valve is that outlet valve and reduction valve have stability and long life-span and reliability preferably in the high-speed motion process.
Its plunger coupled parts is installed in the fuel injection pump housing by the conical surface location suspension of plunger bushing upper end, its fastening force only acts in the very short scope in plunger bushing upper end, avoided Installation Stress make plunger bushing oil inlet and oil return hole around produce excessive distortion, thereby guarantee the normal use and the life-span of plunger coupled parts.Plunger diameter Φ 21mm, ram lift is 20mm, maximum how much fuel deliveries reach 2400mm
3/ circulation, helix adopts the composite screw line of fuel feeding terminal point regulative mode, and the plunger coupled parts structural design has the pressure lubrication oil duct, has increased the bite-resistant ability of plunger coupled parts, can burn all kinds of Diesel oils and low viscosity heavy oil, this moment, plunger surface was without enhancement process; The GB/T17411RMG35 that can burn residue fuel oil peculiar to vessel and crude oil, this moment, plunger surface adopted corrosion resistant strengthened coat to handle, and comprised the processing of coating TiC, TiN and other composite coatings.
Described isobaric Injection Pump profile top is that square, bottom are all directions shape, triangle flange shape, band roller structure.
Isobaric Injection Pump of the present utility model is mainly used in the DK20 serial diesel engine, is 720r/min especially for rotating speed, and single cylinder rated power is 160kW, and cylinder diameter is the diesel engine of φ 200mm.
The architecture advances of the utility model on constant pressure delivery valve assembly and plunger coupled parts, can make whole isobaric Injection Pump at using at rated speed 720r/min, 750r/min, 900r/min, single cylinder rated power is 100kW～160Kw, cylinder diameter is φ 200mm, when stroke is the reinforcement diesel engine of 300mm, good stability in the course of the work, the life-span is long, and reliability is also higher than General System.
Description of drawings
Fig. 1 is the sectional structure chart of this isobaric Injection Pump.
Fig. 2 is the sectional structure chart of constant pressure delivery valve employed in figure 1.
Fig. 3 is the sectional structure chart of the plunger coupled parts that adopts of Fig. 1.
Fig. 4 is the outline drawing of isobaric Injection Pump.
Embodiment
Below in conjunction with description of drawings the utility model structure.
Referring to Fig. 1, this isobaric Injection Pump is made up of constant pressure delivery valve assembly 4, the pump housing 5, plunger coupled parts 6, hexagon socket cap head screw 1, gear ring 8, tooth bar 9, upper spring dish 10, piston spring 11, lower spring cup 12 and guide piston assembly 13 and other parts.Injection Pump is installed on the diesel engine cam case, and the rotation of camshaft promotes 13 to-and-fro motion of guide piston assembly, thereby injection pump plunger moves up and down, thereby reaches the purpose of fuel feeding.By pulling tooth bar 9, gear ring 8 is rotated, drive plunger and rotate, thereby different oil masses is provided, satisfy different working condition requirements.
The structure of constant pressure delivery valve assembly 4 is referring to Fig. 2, among the figure, and the 41st, delivery valve seat, the 42nd, outlet valve, the 43rd, oil outlet valve spring, the 44th, thick pressure regulation pad, the 45th, thin pressure regulation pad, the 46th, reduction valve, the 47th, pressure-relief valve spring, the 48th, reduction valve pressure regulation packing ring, the 49th, Pressure relief valve seat.Thick adjustment pad 44, the thin pad 46 of adjusting are contained in oil outlet valve spring 43 upper ends, and pack into outlet valve 42 endoporus and outlet valve of oil outlet valve spring 43 lower ends packed in delivery valve seat 41 holes together.Match with Pressure relief valve seat 49 by reduction valve pressure regulation packing ring 48 in pressure-relief valve spring 47 lower ends, the upper end cooperates with reduction valve 46, by the Pressure relief valve seat pressure spring, reduction valve is pressed in the delivery valve seat hole.
Constant pressure delivery valve assembly 4 is an outlet valve, it is again a reduction valve, in the plunger delivery stroke, oil pressure in the hyperbaric chamber 7 raises, this pressure is born by plane sealing outlet valve 42, when this pressure during greater than delivery valve opening pressure, outlet valve 42 overcomes the spring force of oil outlet valve spring 43 and lifts, high pressure oil in the hyperbaric chamber 7 is pressed in the high-pressure oil pipe by high-pressure oil duct 3, thereby finishes the supply of high pressure oil, after fuel feeding finishes, hyperbaric chamber 7 becomes low-pressure cavity, high pressure oil in the high-pressure oil pipe oppositely flows into low-pressure cavity through high pressure oil back oil road 2 and high pressure oil oil road 3, and after high pressure oil was lower than a certain setting numerical value, outlet valve cut out.Equally, when if the oil pressure in the hyperbaric chamber 7 is higher than the reduction valve cracking pressure owing to the pressure wave transmission with the stack sum, then reduction valve 46 overcomes the impacting force of pressure-relief valve spring 47 and lifts, high pressure oil enters low-pressure cavity through high pressure oil oil road 3 and hyperbaric chamber 7, oil pressure in the high-pressure oil duct obtains pressure release, each cylinder oil pressure balance.
The structure of plunger coupled parts 6 is referring to Fig. 3, plunger 61 plunger surfaces have adopted corrosion resistant strengthened coat to handle, comprise the processing of coating TiC, TiN and other composite coatings, design has annular groove 63 and oblique oil duct 64, its effect has been low pressure oil oil return and to the plunger forced lubrication, on the one hand, and in the fuel feeding process, when having low pressure oil to ooze out, can be back to fuel tank by back oil road in the plunger coupled parts gap.On the other hand, lubricant oil carries out pressure lubrication by grease way to plunger 61, is back to oil tank by back oil road again.Plunger bushing 62 upper ends hang by conical surface location and are installed in the fuel injection pump housing, and its fastening force only acts in the very short scope in plunger bushing upper end, avoided Installation Stress make plunger bushing oil inlet and oil return hole around produce excessive distortion.
Referring to Fig. 4, the profile top of this isobaric Injection Pump is that square, bottom are all directions shape, the outlet valve seat of honour, fuel-displaced lower valve seat, delivery connection and pressing plate integral structure form.Reduce high pressure sealing face quantity, helped high pressure sealing.
Claims (3)
1, the isobaric Injection Pump of a kind of use for diesel engine mechanical type comprises fuel injection pump housing, constant pressure delivery valve assembly, plunger coupled parts, gear ring rack gear and the plunger reciprocating mechanism of being with the triangle flange; It is characterized in that:
Described constant pressure delivery valve assembly adopts the outlet valve seat of honour, fuel-displaced lower valve seat, delivery connection and pressing plate integral structure form; Outlet valve is that plane sealing formula structure, reduction valve are the guiding valve sealed construction;
Described plunger coupled parts is installed in the fuel injection pump housing by the conical surface location suspension of plunger bushing upper end, has the pressure lubrication oil duct on the plunger; Plunger diameter is Φ 21mm, and lift is 20mm, and helix adopts the composite screw line of fuel feeding terminal point regulative mode, and maximum how much fuel deliveries are 2400mm
3/ circulation.
2, the isobaric Injection Pump of diesel engine machinery formula according to claim 1 is characterized in that, the outlet valve diameter phi 14mm of described constant pressure delivery valve assembly, and delivery valve opening pressure is 1.8MPa～2.0MPa; Reduction valve diameter phi 7mm, the reduction valve cracking pressure is 7.8MPa～8.3MPa; The throttle orifice diameter is φ 1.0～φ 1.2mm.
3, the isobaric Injection Pump of diesel engine machinery formula according to claim 1 and 2, it is characterized in that, described fuel injection pump housing profile top is that square, bottom are all directions shape, monoblock pump for the band roller, its at the diesel engine rated speed three kinds of 720r/min, 750r/min, 900r/min are arranged, single cylinder rated power is 100kW～160Kw, and cylinder diameter is φ 200mm, and stroke is 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201266331U CN201363217Y (en) | 2009-03-13 | 2009-03-13 | Mechanical equal-pressure oil injection pump used for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201266331U CN201363217Y (en) | 2009-03-13 | 2009-03-13 | Mechanical equal-pressure oil injection pump used for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201363217Y true CN201363217Y (en) | 2009-12-16 |
Family
ID=41473880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201266331U Expired - Lifetime CN201363217Y (en) | 2009-03-13 | 2009-03-13 | Mechanical equal-pressure oil injection pump used for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201363217Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374087A (en) * | 2011-10-20 | 2012-03-14 | 重庆红江机械有限责任公司 | High-pressure high-injection-rate single oil injection pump |
| CN104405551A (en) * | 2014-12-10 | 2015-03-11 | 南岳电控(衡阳)工业技术有限公司 | Single cylinder fuel cut-off high-speed diesel engine unit pump |
| CN106121887A (en) * | 2016-08-24 | 2016-11-16 | 重庆红江机械有限责任公司 | A kind of fuel injector integrating electronically controlled unit pump |
| CN108150328A (en) * | 2017-12-25 | 2018-06-12 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of high-power monomer pump plunger |
-
2009
- 2009-03-13 CN CNU2009201266331U patent/CN201363217Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374087A (en) * | 2011-10-20 | 2012-03-14 | 重庆红江机械有限责任公司 | High-pressure high-injection-rate single oil injection pump |
| CN104405551A (en) * | 2014-12-10 | 2015-03-11 | 南岳电控(衡阳)工业技术有限公司 | Single cylinder fuel cut-off high-speed diesel engine unit pump |
| CN106121887A (en) * | 2016-08-24 | 2016-11-16 | 重庆红江机械有限责任公司 | A kind of fuel injector integrating electronically controlled unit pump |
| CN106121887B (en) * | 2016-08-24 | 2019-09-13 | 重庆红江机械有限责任公司 | A kind of fuel injector integrating electronically controlled unit pump |
| CN108150328A (en) * | 2017-12-25 | 2018-06-12 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of high-power monomer pump plunger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091216 |