CN202560415U - Improved fuel injection pump assembly - Google Patents
Improved fuel injection pump assembly Download PDFInfo
- Publication number
- CN202560415U CN202560415U CN201220222895XU CN201220222895U CN202560415U CN 202560415 U CN202560415 U CN 202560415U CN 201220222895X U CN201220222895X U CN 201220222895XU CN 201220222895 U CN201220222895 U CN 201220222895U CN 202560415 U CN202560415 U CN 202560415U
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- China
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- plunger
- outlet valve
- spring
- injection pump
- pump assembly
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Abstract
The utility model relates to the technical field of diesel engine fuel supply system manufacture, and particularly to an improved fuel injection pump assembly. The fuel injection pump assembly mainly comprises a plunger bushing. The structural characteristic is that: the plunger bushing is formed by integral casting, a fuel inlet pipe is arranged at the side part, and a fuel outlet valve seat is in screwed connection with the plunger bushing; a fuel outlet valve spring is arranged in the inner cavity of the fuel outlet valve seat and is tightly pressed on the shoulder blade surface of a fuel outlet valve; the conical surface of the fuel outlet valve is in sealed connection with the conical surface of the fuel outlet valve seat; a plunger is slidably mounted at the lower part of the inner cavity of the plunger bushing, a clearance groove is formed at the middle par of the plunger, and a spring lower seat is hung at the small head of the plunger; and a plunger spring is tightly pressed on the spring lower seat, and a push rod body is arranged at the spring lower seat. The fuel injection pump assembly provided by the utility model has the advantages of compact structure, convenience in processing, high structural strength and light weight, and satisfies the operational requirements of small cylinder diameter air cooling diesel engines for a small installation space.
Description
Technical field
The utility model relates to fuel system for diesel engine manufacturing technology field, relates to a kind of improvement injection pump assembly particularly.
Background technique
Existing diesel engine oil supply system uses AK series injection pump assembly, AD series injection pump assembly in a large number.AK, the AD series injection pump assembly pump housing and plunger bushing are split type, are assemblied in the plunger bushing after plunger and the plunger bushing precision-fit, and this structure Injection Pump complex structure, the size that is associated is many, difficulty of processing is big, volume is big.For satisfying requirement energy-saving and cost-reducing and compact structure, need further improve existing injection pump assembly.
Summary of the invention
The utility model is in order to remedy the deficiency of existing technology, a kind of reasonable in design, compact structure is provided, has been prone to the improvement injection pump assembly of processing.
The technological scheme of the utility model is: a kind of improvement injection pump assembly, mainly comprise plunger bushing, and its structure characteristic is that said plunger bushing is an integral casting system; The sidepiece of plunger bushing is provided with oil inlet pipe, and screw thread is connected to delivery valve holder on the plunger bushing, and the delivery valve holder inner chamber is equipped with oil outlet valve spring; Oil outlet valve spring is pressed on the outlet valve omoplate face, and the conical surface of outlet valve is connected with the conical surface seal of delivery valve seat, and the inner chamber bottom slidable fit of plunger bushing has plunger; The plunger middle part has clearance groov; The microcephaly of plunger hangs with spring lower seat, and piston spring is pressed on the spring lower seat, under the spring lower seat pusher body is housed.
Clearance groov is the annular groove that the plunger middle part has.
The beneficial effect of the utility model is: the structure that the improvement injection pump assembly of this structure adopts fuel injection pump housing and plunger bushing to unite two into one; It is reasonable in design, compact structure, be prone to processing, structural strength is good and light weight, has satisfied the little usage requirement of installing space of little cylinder diameter air-cooled diesel engine; Middle part at plunger is designed with clearance groov, in clearance groov, has fuel oil, the effect that makes it play cooling, lubricate.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further
A kind of structural representation of improveing injection pump assembly of Fig. 1 for providing according to the utility model.
A kind of structural representation of improveing the plunger of injection pump assembly of Fig. 2 for providing according to the utility model.
Among the figure, 1-delivery valve holder, 2-oil outlet valve spring, 3-oil inlet pipe, 4-plunger bushing, 5-outlet valve, 6-delivery valve seat, 7-plunger, 8-clearance groov, 9-piston spring, 10-spring lower seat, 11-pusher body.
Embodiment
Accompanying drawing is a kind of specific embodiment of the utility model, and according to Fig. 1, shown in Figure 2, plunger bushing 4 is integral casting system; The sidepiece of plunger bushing 4 is provided with oil inlet pipe 3, and screw thread is connected to delivery valve holder 1 on the plunger bushing 4, and delivery valve holder 1 inner chamber is equipped with oil outlet valve spring 2; Oil outlet valve spring 2 is pressed on the outlet valve 5 omoplate faces, and the conical surface of outlet valve 5 is connected with the conical surface seal of delivery valve seat 6, and the inner chamber bottom slidable fit of plunger bushing 4 has plunger 7; Plunger 7 middle parts have clearance groov 8, the annular groove that clearance groov 8 has for plunger 7 middle parts, and the microcephaly of plunger 7 hangs with spring lower seat 10; Piston spring 9 is pressed on the spring lower seat 10, and spring lower seat is equipped with pusher body 11 10 times.
When normality because outlet valve 5 receives the pretightening force outlet valve 5 and delivery valve seat 6 conical surface seals of oil outlet valve spring 2; When plunger bushing oil inlet pipe 3 had fuel oil to get into, fuel oil was full of in the plunger cavity, thereby compression plunger spring 9 promotion plungers 7 move up when pusher body 11 receives thrust; Along with moving of plunger 7; When the fuel pressure after the compression during greater than the pretightening force of outlet valve 5 suffered oil outlet valve springs 2, outlet valve 5 motion that will delivery valve seat 6 in, make progress makes high pressure fuel spray from the head of delivery valve holder 1; Plunger 7 does not move down under the effect of piston spring 9 when pusher body 11 does not receive thrust; Along with the ejection fuel pressure of high pressure fuel descends, when the pressure of outlet valve 5 suffered fuel oils during less than the pretightening force of suffered oil outlet valve spring 2, outlet valve 5 moves downward closes fuel oil and outwards sprays.Plunger 7 because plunger 7 has certain clearance with plunger bushing 4, will have the part fuel oil to get into the clearance groov 8 of plunger 7 when to-and-fro motion, and the fuel oil of clearance groov 8 plays lubricated effect when plunger 7 to-and-fro motion.The improvement injection pump assembly compact structure of this structure, easy to process, structural strength good and light weight, satisfied the little usage requirement of installing space of little cylinder diameter air-cooled diesel engine.
Claims (2)
1. an improvement injection pump assembly comprises plunger bushing, and it is characterized in that: said plunger bushing is that cast inblock forms; The sidepiece of plunger bushing (4) is provided with oil inlet pipe (3), and plunger bushing (4) is gone up screw thread and is connected to delivery valve holder (1), and oil outlet valve spring (2) is equipped with in delivery valve holder (1) chamber; Oil outlet valve spring (2) is pressed on outlet valve (5) the omoplate face, and the conical surface of outlet valve (5) is connected with the conical surface seal of delivery valve seat (6), and the inner chamber bottom slidable fit of plunger bushing (4) has plunger (7); Plunger (7) middle part has clearance groov (8); The microcephaly of plunger (7) hangs with spring lower seat (10), and piston spring (9) is pressed on the spring lower seat (10), and pusher body (11) is housed under the spring lower seat (10).
2. a kind of improvement injection pump assembly according to claim 1 is characterized in that: the annular groove that said clearance groov (8) has for plunger (7) middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220222895XU CN202560415U (en) | 2012-05-14 | 2012-05-14 | Improved fuel injection pump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220222895XU CN202560415U (en) | 2012-05-14 | 2012-05-14 | Improved fuel injection pump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202560415U true CN202560415U (en) | 2012-11-28 |
Family
ID=47210078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220222895XU Expired - Lifetime CN202560415U (en) | 2012-05-14 | 2012-05-14 | Improved fuel injection pump assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202560415U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629029A (en) * | 2013-11-28 | 2014-03-12 | 江苏金銮油泵有限公司 | Novel Q-series fuel injection pump assembly |
-
2012
- 2012-05-14 CN CN201220222895XU patent/CN202560415U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629029A (en) * | 2013-11-28 | 2014-03-12 | 江苏金銮油泵有限公司 | Novel Q-series fuel injection pump assembly |
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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: 20121128 |