CN202325957U - Single fuel injection pump with high pressure and high injection rate - Google Patents
Single fuel injection pump with high pressure and high injection rate Download PDFInfo
- Publication number
- CN202325957U CN202325957U CN2011204702147U CN201120470214U CN202325957U CN 202325957 U CN202325957 U CN 202325957U CN 2011204702147 U CN2011204702147 U CN 2011204702147U CN 201120470214 U CN201120470214 U CN 201120470214U CN 202325957 U CN202325957 U CN 202325957U
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- Prior art keywords
- injection pump
- plunger
- upper body
- fuel injection
- type
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Abstract
The utility model discloses a single fuel injection pump with high pressure and high injection rate, comprising a fuel injection pump body, a constant pressure delivery valve assembly, a plunger and barrel assembly, a gear ring and rack adjusting mechanism and a plunger reciprocating mechanism. The whole fuel injection pump is divided into an upper body and a lower body, wherein the upper body is internally provided with the plunger and barrel assembly and the gear ring and rack adjusting mechanism, the lower body with a roller structure is internally provided with the plunger reciprocating mechanism, and the upper body and the lower body are provided with square flanges through which the upper body and the lower body are connected into a whole; and the fuel injection pump is internally of a double-spring structure, a plunger spring is located in the upper body, and a guide piston spring is located in the lower body. The fuel injection pump is designed for a high-performance diesel engine and can meet the requirement of an engine with the rated speed of 650-800r/min, the single-cylinder rated power of 300-350kW, the cylinder diameter of 250-280mm and the stroke of 370-390mm.
Description
Technical field
The utility model belongs to the diesel engine field, and being specifically related to a kind of rotating speed that is used for is 650～800 r/min, and single cylinder rated power is 300～350kW, and cylinder diameter is the diesel injection pump of φ 250～φ 280mm.
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 is 650～800 r/min; Single cylinder rated power is 300～350kW; Cylinder diameter be φ 250～φ 280mm the reinforcement diesel engine; Existing diesel injection pump all can not satisfy its requirement preferably at aspects such as stability and working lifes, has the further improved place of many needs.
Summary of the invention
The purpose of the utility model is the above-mentioned deficiency to the existing technology existence; The high Spraying rate monomer-type of a kind of high pressure Injection Pump is proposed; To be applicable to that rotating speed is 650～800 r/min; Single cylinder rated power is 300～350kW, and cylinder diameter is the oil spout needs of the diesel injection pump of φ 250～φ 280mm.
The technological scheme of the utility model is following:
The high Spraying rate monomer-type of a kind of high pressure Injection Pump is the mechanical type Injection Pump, and its composition comprises fuel injection pump housing, constant pressure delivery valve assembly, plunger coupled parts, gear ring tooth bar controlling mechanism and plunger reciprocating mechanism.
Whole fuel injection pump housing divides two bilge constructions up and down, and plunger coupled parts and gear ring tooth bar controlling mechanism are installed in the upper body, and the plunger reciprocating mechanism is installed in the lower body, lower body band roller structure, and upper body and lower body have the square flange, connect as one through flanged surface; Adopt the dual spring structure in the fuel injection pump housing, piston spring is positioned at the upper body, and the guide piston spring is positioned at lower body.Injection Pump adopts two body structures up and down, helps the assembling of Injection Pump and opens and inspect.The design of employing dual spring helps the tracking of roller.
The employing integrated type delivery valve seat structure of said constant pressure delivery valve assembly is installed on the upper body, and such structure has reduced high pressure sealing face quantity, helps high pressure sealing.The outlet valve of constant pressure delivery valve assembly is a plane sealing formula structure, and reduction valve is a slide-valve structure.Outlet valve diameter phi 16mm, delivery valve opening pressure are 1.2MPa～1.8MPa; Reduction valve diameter phi 10mm, the reduction valve cracking pressure is 12MPa～16MPa, the throttle orifice diameter is φ 1.0～1.2mm.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.
Said plunger coupled parts adopts the suspension mounting type; Plunger bushing and top, upper body are carried out suspension type and are installed; 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 normal use and life-span at high injection pressure lower plunger idol part.
Plunger diameter is Φ 24～Φ 26mm, and lift is 30～32mm.The helix of said plunger adopts the composite screw line of variable oil-supply adjusting in correct time, and maximum how much fuel deliveries reach 5770mm
3/ circulation.Do not do reinforcement when plunger surface and handle, all kinds of Diesel oils and low viscosity heavy oil can burn; And when the surface at plunger forms corrosion resistant TiC or TiN or his composite coating, the HF0 that can burn (380cSt/50 ℃ of heavy oil), MGO etc.
The advantage of the utility model is:
1 this Injection Pump is mainly used in rotating speed 650～800r/min diesel engine.
2 these Injection Pumps are applicable to all kinds of Diesel oils, low viscosity heavy oil and HFO (380cSt/50 ℃ of heavy oil), MGO.
The high pressure sealing face quantity of the constant pressure delivery valve assembly of 3 these Injection Pumps is few, helps high pressure sealing.
The cracking pressure of the outlet valve of 4 these Injection Pumps and the cracking pressure of reduction valve are all adjustable, owing to be plane sealing formula structure and slide-valve structure, the constant pressure delivery valve assembly is good stability in the course of the work, and the life-span is long, and reliability is also higher than General System.
5 plunger coupled partss adopt the suspension mounting type, 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, thereby guarantee the normal use and the life-span of plunger coupled parts.
7 these Injection Pumps adopt two body structures up and down, are convenient to assembling, open and inspect.
Description of drawings
Fig. 1 is the sectional structure chart of this Injection Pump;
Fig. 2 is the outline drawing of this Injection Pump.
Embodiment:
Referring to Fig. 1 and Fig. 2, this Injection Pump includes constant pressure delivery valve assembly 1, gear ring 2, tooth bar 3, plunger coupled parts 4, upper spring seat 5, piston spring 6, upper body 7, lower spring cup 8, lower body 9, guide piston spring 10, plunger 11 and other part.The pump housing of this Injection Pump is divided into upper body 7 and lower body 9.Plunger coupled parts 4, upper spring seat 5, piston spring 6 and lower spring cup 8 are housed in the upper body 7, and the gear ring tooth bar controlling mechanism that constitutes by gear ring 2 and tooth bar 3.The guide piston reciprocating mechanism that guide piston, guide piston spring 10 etc. constitute is installed, lower body 9 band rollers in the lower body 9.Upper body 7 has the square flange with lower body 9, and flanged surface connects through screw.This Injection Pump is installed on the diesel engine cam case, and the rotation of camshaft promotes the guide piston assembly to-and-fro motion in the lower body 9, thereby makes the plunger upward and downward in the upper body, thereby reaches the purpose of fuel feeding.Through pulling tooth bar 3, gear ring 2 is rotated, drive plunger and rotate, thereby different oil masses is provided, satisfy the different working conditions requirement.
The plunger bushing of this Injection Pump adopts suspension type to install in upper body 7; 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 reliability that plunger and bare of injection pump is worked under high injection pressure.
Injection Pump is provided with the pressure lubrication oil duct on plunger coupled parts, increased the bite-resistant ability of plunger coupled parts.The diameter of plunger 11 is Φ 24～Φ 26mm, and lift is 30～32mm, and helix adopts the variable oil-supply composite screw line in correct time, and maximum how much fuel deliveries reach 5770mm
3/ circulation.Plunger surface has adopted corrosion resistant strengthened coat to handle, and can be TiC, TiN and other composite coatings.
Constant pressure delivery valve assembly 1 adopts the delivery valve seat global design, is installed on the upper body 7, has only a high pressure sealing face, allows peak injection pressure to reach more than the 160MPa.Outlet valve and reduction valve are arranged in the constant pressure delivery valve assembly 1, and outlet valve diameter phi 16mm, delivery valve opening pressure are 1.2MPa～1.8MPa; Reduction valve diameter phi 10mm, the reduction valve cracking pressure is 12MPa～16MPa.
Claims (5)
1. the high Spraying rate monomer-type of high pressure Injection Pump; Be the mechanical type Injection Pump; Being used for rotating speed is 650～800 r/min; Single cylinder rated power is 300～350kW, and cylinder diameter is the diesel injection pump of φ 250～φ 280mm, and its composition comprises fuel injection pump housing, constant pressure delivery valve assembly, plunger coupled parts, gear ring tooth bar controlling mechanism and plunger reciprocating mechanism; It is characterized in that:
Whole fuel injection pump housing divides two bilge constructions up and down, and plunger coupled parts and gear ring tooth bar controlling mechanism are installed in the upper body, and the plunger reciprocating mechanism is installed in the lower body, lower body band roller structure, and upper body and lower body have the square flange, connect as one through flanged surface; Adopt the dual spring structure in the fuel injection pump housing, piston spring is positioned at the upper body, and the guide piston spring is positioned at lower body.
2. the high Spraying rate monomer-type of high pressure according to claim 1 Injection Pump is characterized in that: the employing integrated type delivery valve seat structure of said constant pressure delivery valve assembly is installed on the upper body; The outlet valve of constant pressure delivery valve assembly is a plane sealing formula structure, and reduction valve is a slide-valve structure, outlet valve diameter phi 16mm; Delivery valve opening pressure is 1.2MPa～1.8MPa; Reduction valve diameter phi 10mm, the reduction valve cracking pressure is 12MPa～16MPa, the throttle orifice diameter is φ 1.0～1.2mm.
3. the high Spraying rate monomer-type of high pressure according to claim 1 Injection Pump is characterized in that: said plunger coupled parts carries out suspension type through plunger bushing and top, upper body and installs in the upper body; The plunger diameter of plunger coupled parts is Φ 24～Φ 26mm, and lift is 30～32mm.
4. the high Spraying rate monomer-type of high pressure according to claim 3 Injection Pump is characterized in that: the helix of said plunger adopts the composite screw line of variable oil-supply adjusting in correct time, and maximum how much fuel deliveries reach 5770mm
3/ circulation.
5. the high Spraying rate monomer-type of high pressure according to claim 3 Injection Pump, it is characterized in that: the surface of plunger has corrosion resistant TiC or TiN coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204702147U CN202325957U (en) | 2011-10-20 | 2011-11-23 | Single fuel injection pump with high pressure and high injection rate |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120401542.1 | 2011-10-20 | ||
| CN201120401542 | 2011-10-20 | ||
| CN2011204702147U CN202325957U (en) | 2011-10-20 | 2011-11-23 | Single fuel injection pump with high pressure and high injection rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325957U true CN202325957U (en) | 2012-07-11 |
Family
ID=45793180
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103760775A Pending CN102374087A (en) | 2011-10-20 | 2011-11-23 | High-pressure high-injection-rate single oil injection pump |
| CN2011204702147U Expired - Lifetime CN202325957U (en) | 2011-10-20 | 2011-11-23 | Single fuel injection pump with high pressure and high injection rate |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103760775A Pending CN102374087A (en) | 2011-10-20 | 2011-11-23 | High-pressure high-injection-rate single oil injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN102374087A (en) |
Cited By (1)
| 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB385642A (en) * | 1931-09-16 | 1933-01-05 | Richard Oldham | Oil or liquid pumps |
| CN2258230Y (en) * | 1995-09-29 | 1997-07-23 | 许候标 | Small in-line fuel-injection pump |
| AT409787B (en) * | 1996-08-23 | 2002-11-25 | Steyr Daimler Puch Ag | FUEL INJECTION UNIT FOR DIESEL ENGINES |
| EP0863308A1 (en) * | 1997-03-05 | 1998-09-09 | Wärtsilä NSD Schweiz AG | Plunger pump for fluid delivery |
| CN201363217Y (en) * | 2009-03-13 | 2009-12-16 | 重庆红江机械有限责任公司 | Mechanical equal-pressure oil injection pump used for diesel engine |
| CN201810439U (en) * | 2010-10-25 | 2011-04-27 | 重庆红江机械有限责任公司 | Isopiestic pressure oil injection pump |
| 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 |
-
2011
- 2011-11-23 CN CN2011103760775A patent/CN102374087A/en active Pending
- 2011-11-23 CN CN2011204702147U patent/CN202325957U/en not_active Expired - Lifetime
Cited By (1)
| 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 |
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| Publication number | Publication date |
|---|---|
| CN102374087A (en) | 2012-03-14 |
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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 |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |