CN202500691U - High-pressure diesel injection pump - Google Patents
High-pressure diesel injection pump Download PDFInfo
- Publication number
- CN202500691U CN202500691U CN2012201313669U CN201220131366U CN202500691U CN 202500691 U CN202500691 U CN 202500691U CN 2012201313669 U CN2012201313669 U CN 2012201313669U CN 201220131366 U CN201220131366 U CN 201220131366U CN 202500691 U CN202500691 U CN 202500691U
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- China
- Prior art keywords
- plunger
- outlet valve
- speed governing
- injection pump
- speed
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- Expired - Fee Related
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Abstract
The utility model discloses a high-pressure diesel injection pump, comprising a pump body and a speed regulator, wherein the pump body is internally provided with a driving device and plunger assemblies, each plunger assembly comprises a plunger sleeve and a plunger, the plunger is connected with the driving device, the other end of the plunger is provided with an oil discharge valve, the surface of the plunger is provided with oil control chutes, the circumference of the top of the plunger is provided with a slot, the driving device comprises a camshaft and a roll body, the speed regulator comprises a shell, a flyweight system, a tension system and a regulating system, the flyweight system comprises a flyweight bracket, a speed regulating sleeve and a flyweight, the flyweight is hinged with the flyweight bracket and comprises a gravity part and a driving part propping against the top of the speed regulating sleeve, the tension system comprises a tension rod and a connecting support which is matched with the speed regulating sleeve, and the regulating system comprises a speed regulating pull rod, and a regulating support and a speed regulating spring which are mutually connected. The high-pressure diesel injection pump disclosed by the utility model has a damping function and a preferable regulating effect, and the speed regulator can operate stably; and simultaneously, the slot at the top of the plunger can bring forward the oil supply time of the plunger and can replace an advancer, so that the production cost is reduced.
Description
Technical field
The utility model relates to Diesel Engine Technique Field, is specifically related to a kind of high-pressure diesel Injection Pump.
Background technique
Diesel engine is as the major impetus source of automobile, and the reliability of its work depends on the reliability of Injection Pump to a great extent.In this year, because the comburant qualitative diversity, increasingly high requirement has been proposed also for the structural behaviour of diesel engine.At present, existing diesel oil friend pump mainly comprises pump housing part and speed regulator, is provided with plunger coupled parts and outlet valve in the pump housing; Speed regulator is made up of governor shaft, spring seat, governor spring and flyball system, this speed regulator since the flyball system comprise flyball, flyball cooperates with spring seat; Speed regulator is regulated in narrower speed adjustable range, if rotating speed is too high, the speed regulator speed adjusting performance is unstable; Cause flame-out parking phenomenon easily, cause manipulator's difficulty.
In addition, plunger head is provided with the control oil groove and starts groove in this Injection Pump, to satisfy the demand of different motors.After plunger stretches in the plunger bushing, form hyperbaric chamber with plunger bushing, the outer environment facies of plunger are low pressure chamber to hyperbaric chamber, and plunger bushing is provided with oil inlet hole, and oil inlet hole is communicated with hyperbaric chamber and low pressure chamber.The control oil groove is generally spiral chute or skewed slot, is used to regulate the every fuel delivery per cycle of oil pump.At present, traditional common plunger is when work, and plunger moves up and down; After the oil inlet hole on the plunger bushing was closed in the plunger upper-end surface, plunger head hyperbaric chamber volume began to reduce, and the fuel oil pressurized produces pressure; This moment, before the plunger end face was not also closed oil inlet hole, hyperbaric chamber pressure raise owing to the throttling action of fluid power; Cause outlet valve to open fuel feeding in advance, cause the Injection Pump supply time in advance, and the Injection Pump supply time shifts to an earlier date along with the rising of rotating speed automatically.In addition, from outlet valve be opened to that oil-fuel injector needle-valve opens during this period of time, fuel oil will pass through high-voltage tube at interior whole high-pressure oil passage, oil spout and fuel feeding have produced the regular hour and have stepped back.Fuel oil this section highway section of flowing through advances with the velocity of sound, and rotating speed raises, and speed is constant basically; Therefore, this time of stepping back is with rotation speed change, and but great changes have taken place but step back the angle; And corner is directly proportional with rotating speed, because the common standard plunger has only an end face that throttling is impacted.In order to make diesel engine reach emission request, enterprise adopts usually and installs advancer additional, the premature ignition time, increased cost of production like this, and increased the assembling component again.
Summary of the invention
The purpose of the utility model is: to the deficiency of existing technology, the utility model provides good stability, has regulated simple diesel fuel injection pump.
To achieve these goals, the technological scheme below the utility model has adopted:
A kind of high-pressure diesel Injection Pump comprises the pump housing and speed regulator, and described pump housing bottom is provided with drive unit and plunger assembly; Described plunger assembly comprises plunger bushing and can be in plunger bushing reciprocating plunger, and described plunger is shaped on the oily skewed slot of a pair of control away from an end surfaces of drive unit, and the periphery at the top of plunger is provided with short slot; The side that described short slot relies on plunger is a straight flange, and described plunger bushing is provided with outlet valve and constant pressure valve away from an end of drive unit, and described drive unit comprises camshaft and roller body; Described speed regulator comprises housing, is provided with flyball system, tension system and regulating system in the housing, and described camshaft passes housing and forms the camshaft extension part; Described flyball system comprises flyball, flying hammer bracket and speed governing sleeve, and described flyball is articulated on the flying hammer bracket, and described flyball comprises drive portion and gravity portion; The top of described drive portion and speed governing sleeve connects; Described tension system is connected setting with the flyball system, and described tension system comprises tension rail and be connected support that described connection support and speed governing sleeve are equipped with; Described regulating system comprises the adjusting support that is articulated on the housing; Regulate support and be provided with the speed governing pull bar, described adjusting support is provided with governor spring, and described governor spring is connected with tension rail away from an end of regulating support.
As preferably, described tension rail is provided with fixed bearing, and described governor spring is connected setting with fixed bearing.After adopting above-mentioned preferred version, the governor spring of the utility model is more compact with being connected of tension rail.
As preferably, the middle part of described connection support is articulated on the housing, and an end of described connection support is connected setting with tension rail, and the other end and speed governing sleeve connect.After adopting above-mentioned preferred version, connect mid-stent and be articulated on the housing, connecting the support two ends can be free movable.The transmission better effects if also can be well secured on the housing connecting support simultaneously.
As preferably, the end that described connection support cooperates with the speed governing sleeve is provided with the conflict platform, and described speed governing sleeve lining is provided with speed governing sleeve boss, and described conflict platform embeds in the speed governing sleeve, and forms butt with speed governing sleeve platform.After adopting above-mentioned preferred version, the connection support of the utility model and the butt of speed governing sleeve are more stable.
As preferably, described plunger far is arranged with piston spring near an end of camshaft, and described piston spring one end cooperates with the plunger bushing butt.After adopting above-mentioned preferred version, the structure of the diesel fuel injection pump of the utility model is more compact.
As preferably; Described outlet valve comprises delivery valve holder and the outlet valve valve gap that is embedded in plunger bushing one end, and described delivery valve holder cooperates formation outlet valve valve pocket with the outlet valve valve gap, be provided with fuel-displaced spool in the described outlet valve valve pocket; Described outlet valve valve pocket and plunger bushing internal communication; Described fuel-displaced spool overcoat is provided with oil outlet valve spring, and described oil outlet valve spring one end and delivery valve holder connect, and the other end and outlet valve valve gap connect.After adopting above-mentioned preferred version, the structure of the diesel fuel injection pump of the utility model is more compact.
As preferably, be provided with the plunger bushing seal ring between the described plunger bushing and the pump housing.After adopting above-mentioned technological scheme, the plunger bushing of the utility model cooperates more tight with the pump housing, can effectively prevent to reveal.
As preferably, be provided with the outlet valve seal ring between described delivery valve holder and plunger bushing madial wall.Behind above-mentioned preferred version, delivery valve holder of the utility model and plunger bushing madial wall are sealed and matched, and cooperate more closely, can effectively prevent to reveal.
As preferably, be provided with droop adjustment screw between described speed governing pull bar and speed-regulating rack.After adopting above-mentioned preferred version, the diesel fuel injection pump of the utility model can carry out the adjusting of speed, thereby guarantees the stable operation of driving mechanism.
In addition, the flyball of the speed regulator of the utility model is than the weight of the flyball of existing technology, and flyball has improved weight, has increased the centripetal force of flyball, and is more stable.
The flyball system flyball of the speed regulator of the diesel fuel injection pump of the utility model cooperates with the speed governing sleeve, and the speed governing sleeve is provided with extension spring through regulating the bracket adjustment oil mass between speed-regulating rack and speed governing pull bar, has better buffer function; Regulating effect more, speed regulator operation is more stable, simultaneously; Plunger one end is provided with constant pressure valve, can make pump housing stable operation under high pressure conditions, and the short slot of plunger head can make the plunger supply time in advance; And rotating speed is high more, and supply time can replace advancing device just more in advance; Save component, reduced the mounting process step, reduced cost of production.
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Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the structural representation of the utility model plunger.
Embodiment
Like Fig. 1, shown in Figure 2; The embodiment of the utility model specifically is a kind of high-pressure diesel Injection Pump; Comprise the pump housing 1 and speed regulator 2, the pump housing 1 bottom is provided with drive unit 3 and plunger assembly 4, and plunger assembly 4 comprises plunger bushing 41 and can be in plunger bushing 41 reciprocating plunger 42; Plunger bushing is provided with oil inlet hole 411 and spill port 412; The upper-end surface of plunger 42 and plunger bushing 41 formation grease chambeies 421, plunger 42 1 ends are connected with drive unit 3, and plunger 42 is provided with outlet valve 5 away from an end of drive unit 3.Plunger 42 is shaped on the oily skewed slot 421 of a pair of control away from an end surfaces of drive unit 3; Controlling oily skewed slot 421 is symmetrical set; Plunger 42 is provided with and controls the secondary groove 423 that oily skewed slot 421 is communicated with; The periphery at the top of plunger 42 is provided with short slot 422, and the side that short slot 422 relies on plunger 42 is a straight flange, and plunger bushing 41 is provided with outlet valve 5 and constant pressure valve 6 away from an end of drive unit 3.Drive unit 3 comprises camshaft 31 and roller body 32.Speed regulator 2 comprises housing 21 and lid 22, is provided with flyball system 23, tension system 24 and regulating system 25 in the housing 21, and camshaft 31 passes housing 21 and forms camshaft extension part 311.Flyball system 23 comprises flyball 233, flying hammer bracket 231 and speed governing sleeve 232; Flyball 233 is articulated on the flying hammer bracket 231, and flyball comprises drive portion 2332 and gravity portion 2331, and drive portion 2332 connects with the top of speed governing sleeve 232; Tension system 24 is connected setting with flyball system 23; Tension system 24 comprises tension rail 241 and is connected support 242, connects support 242 and is equipped with speed governing sleeve 232, and regulating system 25 comprises the adjusting support 251 that is articulated on the housing 21; Regulate support 251 and be provided with speed governing pull bar 252,251 of speed governing pull bar 252 and speed-regulating racks are provided with droop adjustment screw 254.Regulating on the support 251 has governor spring 253, and governor spring 253 is connected with tension rail 241 away from an end of regulating support 251.
Outlet valve 5 comprises delivery valve holder 51 and the outlet valve valve gap 52 that is embedded in plunger bushing 41 1 ends; Delivery valve holder 51 cooperates formation outlet valve valve pocket 53 with outlet valve valve gap 52; Be provided with fuel-displaced spool 54 in the outlet valve valve pocket 53, outlet valve valve pocket 53 and plunger bushing 41 internal communication, the fuel-displaced spool 54 outer oil outlet valve springs 55 that are arranged with; Oil outlet valve spring 55 1 ends and delivery valve holder 51 connect, and the other end and outlet valve valve gap 52 connect.Be provided with outlet valve seal ring 56 between delivery valve holder 51 and plunger bushing 41 madial walls.
During work, camshaft 31 rotates under the driving of motor, and camshaft 31 surfaces are uneven; When the projection of camshaft 31 pushes up roller body 32; Plunger 42 begins to rise, and rises to when oil inlet hole 411 on the plunger bushing 42 is blocked by the upper-end surface of plunger 42 to stop, because the motion of plunger 42; Fuel oil 421 is extruded from the grease chamber, flows to the outlet valve 5 of top.This process is a pretravel.When plunger 42 blocks oil inlet hole 411, begin to press oily process, plunger is up; Oil pressure in the grease chamber 421 sharply raises; The oil outlet valve spring elastic force that surpasses outlet valve 5 when pressure is during with the top oil pressure, and outlet valve 5 is backed down, and fuel oil entering oil pipe is delivered to oil sprayer.
When plunger 42 continues to move upward; Fuel feeding is also continuing always; When pressing oily process to last till the spill port 412 on the control oil groove 422 alignment post plug sleeves 41 on the plunger 42; When spill port 412 1 is opened, the spill port 412 with on the plunger bushing 41 on plunger 42 flows back to the oil duct in the pump housing to high pressure oil from grease chamber 421.This moment, the oil pressure of grease chamber 421 reduced rapidly, and the effect of outlet valve 5 oil pressure in oil outlet valve spring and high-pressure oil pipe is fallen back on the outlet valve valve seat, and oil sprayer stops oil spout immediately.Though at this moment plunger 42 still continues uply, fuel feeding stops.
The adjusting of fuel delivery can realize through the rotation of plunger 42, and when plunger 42 rotated, the fuel feeding elapsed time was constant, and fuel feeding finish-time, then because the change of the control oil groove 422 of plunger 42 and the relative position of the spill port 412 of plunger bushing 41, and changes.The angle of rotating along with plunger 42 is different, and the effective travel of plunger 42 is also just different, thereby fuel delivery also changes thereupon.
Claims (9)
1. a high-pressure diesel Injection Pump comprises the pump housing and speed regulator, and described pump housing bottom is provided with drive unit and plunger assembly; Described plunger assembly comprises plunger bushing and can be in plunger bushing reciprocating plunger, and said plunger one end is connected with drive unit, it is characterized in that: described plunger is shaped on the oily skewed slot of a pair of control away from an end surfaces of drive unit; The periphery at the top of plunger is provided with short slot, and the side that described short slot relies on plunger is a straight flange, and described plunger bushing is provided with outlet valve and constant pressure valve away from an end of drive unit; Described drive unit comprises camshaft and roller body, and described speed regulator comprises housing, is provided with flyball system, tension system and regulating system in the housing; Described camshaft passes housing and forms the camshaft extension part; Described flyball system comprises flyball, flying hammer bracket and speed governing sleeve, and described flyball is articulated on the flying hammer bracket, and described flyball comprises drive portion and gravity portion; The top of described drive portion and speed governing sleeve connects; Described tension system is connected setting with the flyball system, and described tension system comprises tension rail and be connected support that described connection support and speed governing sleeve are equipped with; Described regulating system comprises the adjusting support that is articulated on the housing; Regulate support and be provided with the speed governing pull bar, described adjusting support is provided with governor spring, and described governor spring is connected with tension rail away from an end of regulating support.
2. high-pressure diesel Injection Pump according to claim 1 is characterized in that: described tension rail is provided with fixed bearing, and described governor spring is connected setting with fixed bearing.
3. high-pressure diesel Injection Pump according to claim 1 is characterized in that: the middle part of described connection support is articulated on the housing, and an end of described connection support is connected setting with tension rail, and the other end and speed governing sleeve connect.
4. high-pressure diesel Injection Pump according to claim 3; It is characterized in that: the end that described connection support cooperates with the speed governing sleeve is provided with the conflict platform; Described speed governing sleeve lining is provided with speed governing sleeve boss; Described conflict platform embeds in the speed governing sleeve, and forms butt with speed governing sleeve platform.
5. high-pressure diesel Injection Pump according to claim 1 is characterized in that: described plunger far is arranged with piston spring near an end of camshaft, and described piston spring one end cooperates with the plunger bushing butt.
6. high-pressure diesel Injection Pump according to claim 1; It is characterized in that: described outlet valve comprises delivery valve holder and the outlet valve valve gap that is embedded in plunger bushing one end; Described delivery valve holder cooperates formation outlet valve valve pocket with the outlet valve valve gap; Be provided with fuel-displaced spool in the described outlet valve valve pocket, described outlet valve valve pocket and plunger bushing internal communication, described fuel-displaced spool overcoat is provided with oil outlet valve spring; Described oil outlet valve spring one end and delivery valve holder connect, and the other end and outlet valve valve gap connect.
7. high-pressure diesel Injection Pump according to claim 1 is characterized in that: be provided with the plunger bushing seal ring between the described plunger bushing and the pump housing.
8. high-pressure diesel Injection Pump according to claim 6 is characterized in that: be provided with the outlet valve seal ring between described delivery valve holder and plunger bushing madial wall.
9. high-pressure diesel Injection Pump according to claim 1 is characterized in that: be provided with droop adjustment screw between described speed governing pull bar and speed-regulating rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201313669U CN202500691U (en) | 2012-03-30 | 2012-03-30 | High-pressure diesel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201313669U CN202500691U (en) | 2012-03-30 | 2012-03-30 | High-pressure diesel injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202500691U true CN202500691U (en) | 2012-10-24 |
Family
ID=47037306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201313669U Expired - Fee Related CN202500691U (en) | 2012-03-30 | 2012-03-30 | High-pressure diesel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202500691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761839A (en) * | 2021-01-28 | 2021-05-07 | 长江武汉航道工程局 | Plunger coupling piece of obtuse-angle oil groove of high-pressure oil pump |
-
2012
- 2012-03-30 CN CN2012201313669U patent/CN202500691U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761839A (en) * | 2021-01-28 | 2021-05-07 | 长江武汉航道工程局 | Plunger coupling piece of obtuse-angle oil groove of high-pressure oil pump |
| CN112761839B (en) * | 2021-01-28 | 2021-11-23 | 长江武汉航道工程局 | Plunger coupling piece of obtuse-angle oil groove of high-pressure oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20140330 |