CN2839601Y - Enhanced diesel engine isobaric fuel-injection pump - Google Patents
Enhanced diesel engine isobaric fuel-injection pump Download PDFInfo
- Publication number
- CN2839601Y CN2839601Y CN 200520010072 CN200520010072U CN2839601Y CN 2839601 Y CN2839601 Y CN 2839601Y CN 200520010072 CN200520010072 CN 200520010072 CN 200520010072 U CN200520010072 U CN 200520010072U CN 2839601 Y CN2839601 Y CN 2839601Y
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- injection pump
- pressure
- valve
- delivery valve
- diesel engine
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Abstract
The utility model discloses an isobaric fuel injection pump of an enhanced diesel engine. The utility model comprises a flanged fuel injection pump body, an isopiestic delivery valve assembly, plunger matching parts, a fuel amount control mechanism and a rotary mechanism, wherein both a delivery valve of the isopiestic delivery valve assembly and a pressure reducing valve of the isopiestic delivery valve assembly have steel-ball type structure; the upper part of the isopiestic delivery valve assembly is communicated with a high-pressure fuel tube through a fuel passage, and the lower part of the isopiestic delivery valve assembly is communicated with a pump chamber through the fuel passage; the opening pressure of the delivery valve is 1.6 MPa, and the opening pressure of the pressure reducing valve is 12 MPa; the plunger matching part has the diameter of 23 mm, and a plunger has the lift range of 24 mm. The isopiestic fuel injection pump is suitable for the enhanced diesel which has the rotation speed of 600 r/min to 825 r/min, the single cylinder power of 160 kW and the cylinder diameter of 230 mm to 250 mm, and can bear the higher injection pressure while having the advantages of strong interchangeability, stable operation, long service life and high reliability.
Description
Technical field
The utility model belongs to diesel technology, and being specifically related to a kind of rotating speed that is used for is 600r/min～825r/min, and power per cylinder is 160kW, and cylinder diameter is the isobaric Injection Pump that ф 230mm～250mm strengthens diesel engine.
Background technique
Strengthen diesel engine in recent years to become the main development trend of diesel engine, cylinder diameter is that ф 230mm～250mm reinforcement diesel engine is mainly used in the land with on generator set and the ship power.More existing isobaric Injection Pump adopts and wait to hold outlet valve, its pump end pressure and structural strength can not satisfy the requirement of strengthening diesel engine, also has to adopt the steel ball type outlet valve, but it is less to diesel engine speed and power coverage area, the interchangeability of not having is strong, and working stability is not high, and oil consumption and discharging are higher.
Summary of the invention
The purpose of this utility model is to provide a kind of isobaric Injection Pump of strengthening diesel engine, it is applicable to that rotating speed is 600r/min～825r/min, power per cylinder is 160kW, cylinder diameter is that ф 230mm～250mm strengthens the diesel engine use, can bear higher jet pressure, interchangeability is strong, good operating stability, life-span is long, the reliability height.
The technical solution of the utility model is as follows:
Strengthen the isobaric Injection Pump of diesel engine, include flanged (FLGD) fuel injection pump housing, constant pressure delivery valve assembly, plunger coupled parts, oil amount regulating mechanism and rotating mechanism.Wherein the outlet valve of constant pressure delivery valve assembly and reduction valve are the steel ball type structure, delivery valve opening pressure is 1.6MPa, be the supercharging oil road, and play the partition effect of high-pressure oil duct and low pressure oil duct, the reduction valve cracking pressure is 12MPa, carry oil duct and decompression for letting out, also play the partition effect of high-pressure oil duct and low pressure oil duct, steel ball type outlet valve and reduction valve have stability and long life-span and reliability preferably in the high-speed motion process.In addition, this Injection Pump has the pressure lubrication oil duct on plunger coupled parts, plunger coupled parts diameter ф 23mm, ram lift is 24mm, the highest permissible velocity of plunger is 1.8m/s, is fit to use light, Heavy diesel oil, can satisfy the requirement of the maximum rated operating mode power per cylinder of diesel engine 250Kw.
This isobaric Injection Pump adopts stud directly to compress constant pressure delivery valve assembly in the fuel injection pump housing and plunger coupled parts by pressing plate and seals and fix, formation be the high pressure sealing of highi degree of accuracy rigid plane, do not have gasket seal, the reliability height.
The profile top of this isobaric Injection Pump is square, the bottom for circular not with the monoblock pump of roller, have interchangeability with present L250 Injection Pump, strengthen on the diesel engine and can directly use at present L250, simultaneously can with strengthen the high supporting use of 240,230 serial diesel engines of index.
The utlity model has following advantage:
1, this isobaric Injection Pump be suitable for diesel engine speed and the power coverage area bigger, interchangeability is strong, can with the supporting use of multiple reinforcement diesel engine.
2, because outlet valve and reduction valve have adopted the steel ball structure design, make constant pressure delivery valve assembly good stability in the course of the work, the life-span is long, and reliability is also higher than General System.
3, pass through plunger and bare of injection pump, the isostructural appropriate design of constant pressure delivery valve assembly, the system peak pressure that it can be born can be up to 140Pa, residual pressure with suitable uniformity can guarantee the conformity of each oil supply cylinder rule, avoids secondary injection and intrasystem cavitation pitting.
Description of drawings
Fig. 1 is a structural drawing of the present utility model.
Fig. 2 is the structural drawing of constant pressure delivery valve employed in figure 1.
Fig. 3 is an outline drawing of the present utility model.
Embodiment
Referring to Fig. 1, this isobaric Injection Pump has constant pressure delivery valve assembly 2, plunger coupled parts 3, fuel injection pump housing 4, oil amount regulating mechanism 5 and rotating mechanism 6.Injection Pump is installed on the diesel engine cam case, and the rotation of cam box promotes the roller push rod to-and-fro motion on it, and the to-and-fro motion of push rod drives fuel feed pump plunger and moves up and down, thereby reaches the purpose of fuel feeding.The plunger diameter of plunger coupled parts 3 is ф 23mm, and ram lift is 24mm, and fuel injection pump housing 4 is provided with pressure lubrication oil duct 7, leads to the plunger jacket wall.
The structure of constant pressure delivery valve assembly 2 is seen Fig. 2, and it is combined between the higher and lower levels by outlet valve seat of honour 2-1 and fuel-displaced lower valve seat 2-6, in establish the outlet valve and the reduction valve of steel ball type structure, delivery valve opening pressure is designed to 1.6MPa, the reduction valve cracking pressure is designed to 12MPa.Outlet valve is by outlet valve upper spring seat 2-2, outlet valve lower spring cup 2-4 and be enclosed within oil outlet valve spring 2-3 on them, the outlet valve steel ball 2-5 that is installed in outlet valve lower spring cup 2-4 and oil discharge passage intersection constitutes; Reduction valve then by reduction valve upper spring seat 2-9, reduction valve lower spring cup 2-7 and be enclosed within pressure-relief valve spring 2-8 on them, the reduction valve steel ball 2-10 that is installed in reduction valve upper spring seat 2-9 and oil discharge passage intersection constitutes.In the plunger delivery stroke, oil pressure in pump chamber 8 (see figure 1)s raises, this pressure is born by outlet valve steel ball 2-5, when this pressure during greater than delivery valve opening pressure, outlet valve steel ball 2-5 overcomes the elastic force of oil outlet valve spring 2-3 and lifts, and the fuel oil in the pump chamber 8 is pressed in the high-pressure oil pipe by oil duct 2-11; After fuel feeding finishes, pump chamber 8 becomes low-pressure cavity, high pressure fuel in the high-pressure oil pipe oppositely flows into low-pressure cavity through oil duct 2-11, and after high pressure oil was lower than a certain setting numerical value, outlet valve cut out, equally, if the oil pressure in the hyperbaric chamber is because pressure wave transmission and superposition sum when being higher than the reduction valve cracking pressure, then reduction valve steel ball 2-10 overcomes the impacting force of pressure-relief valve spring 2-8 and lifts, and high pressure oil enters low-pressure cavity through oil duct 2-12, oil pressure in the high-pressure oil duct obtains pressure release, each cylinder oil pressure balance.
The profile of isobaric Injection Pump is referring to Fig. 3, its top is square, the bottom for circular not with the monoblock pump of roller, one pressing plate 9 is arranged at top, by stud 1 pressing plate 9 is pressed on the fuel injection pump housing 4, thereby compress constant pressure delivery valve assembly and plunger coupled parts, reach the fastening of rigidity high pressure sealing and part.
Claims (4)
1, strengthens the isobaric Injection Pump of diesel engine, include flanged (FLGD) fuel injection pump housing, constant pressure delivery valve assembly, plunger coupled parts, oil amount regulating mechanism and rotating mechanism; It is characterized in that: the outlet valve of constant pressure delivery valve assembly and reduction valve are the steel ball type structure, set gradually outlet valve steel ball, fuel-displaced lower valve seat, oil outlet valve spring and the outlet valve seat of honour in the outlet valve valve body from bottom to top, top leads to high-pressure oil pipe by oil duct, the bottom is communicated with pump chamber by oil duct, and delivery valve opening pressure is 1.6MPa; Set gradually reduction valve steel ball, the reduction valve seat of honour, pressure-relief valve spring and decompression lower valve seat in the relief valve body from top to bottom, top leads to high-pressure oil pipe by oil duct, and the bottom is communicated with pump chamber by oil duct, and the reduction valve cracking pressure is 12MPa; Plunger coupled parts diameter phi 23mm, ram lift is 24mm.
2, the isobaric Injection Pump of reinforcement diesel engine according to claim 1 is characterized in that: have the pressure lubrication oil duct on the fuel injection pump housing, lead to the plunger jacket wall of plunger coupled parts.
3, the isobaric Injection Pump of reinforcement diesel engine according to claim 1 is characterized in that: a pressing plate is arranged on the fuel injection pump housing, directly compressed and fixing constant pressure delivery valve assembly and the plunger coupled parts in the fuel injection pump housing by stud, form high pressure sealing.
4, the isobaric Injection Pump of reinforcement diesel engine according to claim 1, it is characterized in that: the top of Injection Pump is square, the bottom for circular not with the monoblock pump of roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520010072 CN2839601Y (en) | 2005-09-30 | 2005-09-30 | Enhanced diesel engine isobaric fuel-injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520010072 CN2839601Y (en) | 2005-09-30 | 2005-09-30 | Enhanced diesel engine isobaric fuel-injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2839601Y true CN2839601Y (en) | 2006-11-22 |
Family
ID=37427585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520010072 Expired - Lifetime CN2839601Y (en) | 2005-09-30 | 2005-09-30 | Enhanced diesel engine isobaric fuel-injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2839601Y (en) |
-
2005
- 2005-09-30 CN CN 200520010072 patent/CN2839601Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHONGQING HONGJIANG MACHINE CO., LTD. Free format text: FORMER NAME OR ADDRESS: HONGJIANG MACHINERY FACTORY, CHONGQING |
|
| CP03 | Change of name, title or address |
Address after: No. 190 Qingcheng Road, Yongchuan District, Chongqing, China: 402162 Patentee after: Chongqing Hongjiang Machinery Co., Ltd. Address before: No. 190 Qingcheng Road, Yongchuan, Chongqing: 402162 Patentee before: Chongqing Hongjiang Machine Works |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Third Chongqing Road, Yongchuan District No. 404, zip code: 402162 Patentee after: Chongqing Hongjiang Machinery Co., Ltd. Address before: No. 190 Qingcheng Road, Yongchuan District, Chongqing, China: 402162 Patentee before: Chongqing Hongjiang Machinery Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20061122 |
|
| EXPY | Termination of patent right or utility model |