CN205036485U - DPA pump head - Google Patents
DPA pump head Download PDFInfo
- Publication number
- CN205036485U CN205036485U CN201520766340.5U CN201520766340U CN205036485U CN 205036485 U CN205036485 U CN 205036485U CN 201520766340 U CN201520766340 U CN 201520766340U CN 205036485 U CN205036485 U CN 205036485U
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- China
- Prior art keywords
- plunger
- distribution
- described distribution
- sleeve
- rotor
- 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.)
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Abstract
The utility model discloses a DPA pump head, including the distribution shell, install the branch sleeve in the distribution shell, install the distribution rotor in the distribution sleeve, install the plunger on the distribution rotor, install the plunger lid on the plunger, install soket head cap screw on the distribution rotor, install copper washer between distribution rotor and the soket head cap screw. Thereby reach simple structure, the part is small in quantity, small, the quality is light, with low costs, easily control the effect of fuel delivery.
Description
Technical field
The utility model relates to auto parts machinery, particularly relates to a kind of DPA pump head.
Background technique
Motor is long-time continuous firing often, therefore must ensure its functional reliability, improves power character, the Economy of motor.Because the working pressure of fuel pump is high, the parts easily broken down in engine working process, fuel pump is also one of critical component affecting overall engine service behaviour.Traditional jerk fuel injection pump, because volume is large, high low pressure pipeline is long, easily causes the pressure surge of oil feed line, unfavorable controlled circulation fuel delivery; Meanwhile, jerk fuel injection pump easily causes the wearing and tearing of plunger and sleeve in pump oil process, limits the raising of pump oil pressure.
Model utility content
The purpose of this utility model is to provide a kind of DPA pump head, has that structure is simple, number of spare parts is few, volume is little, quality is light, cost is low, the feature of fuel delivery easy to control.
In order to achieve the above object, the technological scheme that the utility model provides is: a kind of PDA pump head, comprise distribution shell, in described distribution shell, a point sleeve is installed, in described distribution sleeve, distribution rotor is installed, described distribution rotor is provided with plunger, described plunger is provided with cover of plunger, described distribution rotor is provided with socket head screw, between described distribution rotor and socket head screw, copper washer is installed.
Described distribution sleeve and distribution shell shrink fit, radial interference amount is 0.035-0.045mm.
Radial clearance between described distribution sleeve and distribution rotor is 0.0025-0.0035mm.
The radial fit gap of described distribution rotor and plunger is 0.0035-0.0045mm.
The beneficial effects of the utility model are: the utility model is by comprising distribution shell, in described distribution shell, a point sleeve is installed, in described distribution sleeve, distribution rotor is installed, described distribution rotor is provided with plunger, described plunger is provided with cover of plunger, described distribution rotor is provided with socket head screw, between described distribution rotor and socket head screw, copper washer is installed.Thus reach that structure is simple, number of spare parts is few, volume is little, quality is light, cost is low, the effect of fuel delivery easy to control.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the expansion enlarged view of structural representation of the present utility model.
Embodiment
Embodiment 1
As shown in Figure 1-2: a kind of DPA pump head, comprise and distribute shell 1, in described distribution shell 1, point sleeve 2 is installed, in described distribution sleeve 2, distribution rotor 3 is installed, described distribution rotor 3 is provided with plunger 4, described plunger 4 is provided with cover of plunger 5, described distribution rotor 3 is provided with socket head screw 6, between described distribution rotor 3 and socket head screw 6, copper washer 7 is installed.Thus reach that structure is simple, number of spare parts is few, volume is little, quality is light, cost is low, the effect of fuel delivery easy to control.
Described distribution sleeve 2 and distribution shell 1 shrink fit, radial interference amount is 0.035-0.045mm.Thus distribution sleeve is coordinated with accurate with distribution shell, install more stable.
Radial clearance between described distribution sleeve 2 and distribution rotor 3 is 0.0025-0.0035mm.Thus prevent distribution sleeve and distribution rotor from killing fault.
Described distribution rotor 3 is 0.0035-0.0045mm with the radial fit gap of plunger 4.
working principle
1. oil-feed process
Clean fuel oil is pumped into the axial oilhole distributing sleeve by secondary vane fuel supply pump, enter the annular oil groove of distribution rotor thus, then arrives distribution sleeve oil inlet hole.Rotate to when any one in distribution rotor oil inlet hole and distribute sleeve oil inlet hole on time, fuel oil just enters in center oilhole and plunger hole, completes oil-feed process;
2. force feed process
After distribution rotor rotates to an angle, roller rolls on cam ring and arrives the top of cam.During this period of time, two opposed plungers move simultaneously, and the fuel oil in plunger hole is pressurized.Meanwhile, dispensing orifice just communicates with one that distributes in sleeve oil outlet, and high pressure fuel feeds to oil sprayer thus;
3. stop oily process
When distribution rotor rolls down from cam ring top, plunger outwards movement under the effect of centrifugal force and oil pressure, the volume of plunger hole increases, and oil pressure declines rapidly, and oil sprayer stops oil spout.
Claims (4)
1. a DPA pump head, it is characterized in that: comprise and distribute shell (1), in described distribution shell (1), a point sleeve (2) is installed, in described distribution sleeve (2), distribution rotor (3) is installed, described distribution rotor (3) is provided with plunger (4), described plunger (4) is provided with cover of plunger (5), described distribution rotor (3) is provided with socket head screw (6), copper washer (7) is installed between described distribution rotor (3) and socket head screw (6).
2. a kind of DPA pump head according to claim 1, is characterized in that: described distribution sleeve (2) with distribute shell (1) shrink fit, radial interference amount is 0.035-0.045mm.
3. a kind of DPA pump head according to claim 1, is characterized in that: the radial clearance between described distribution sleeve (2) and distribution rotor (3) is 0.0025-0.0035mm.
4. a kind of DPA pump head according to claim 1, is characterized in that: described distribution rotor (3) is 0.0035-0.0045mm with the radial fit gap of plunger (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520766340.5U CN205036485U (en) | 2015-09-30 | 2015-09-30 | DPA pump head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520766340.5U CN205036485U (en) | 2015-09-30 | 2015-09-30 | DPA pump head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205036485U true CN205036485U (en) | 2016-02-17 |
Family
ID=55295393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520766340.5U Active CN205036485U (en) | 2015-09-30 | 2015-09-30 | DPA pump head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205036485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167099A (en) * | 2017-10-26 | 2018-06-15 | 绍兴市雅克汽配有限公司 | A kind of high pressure distributes pump head |
-
2015
- 2015-09-30 CN CN201520766340.5U patent/CN205036485U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167099A (en) * | 2017-10-26 | 2018-06-15 | 绍兴市雅克汽配有限公司 | A kind of high pressure distributes pump head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |