CN2918771Y - Single-cylinder diesel engine oil spouting pump - Google Patents
Single-cylinder diesel engine oil spouting pump Download PDFInfo
- Publication number
- CN2918771Y CN2918771Y CN 200620104547 CN200620104547U CN2918771Y CN 2918771 Y CN2918771 Y CN 2918771Y CN 200620104547 CN200620104547 CN 200620104547 CN 200620104547 U CN200620104547 U CN 200620104547U CN 2918771 Y CN2918771 Y CN 2918771Y
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- CN
- China
- Prior art keywords
- injection pump
- plunger
- fuel injection
- seat
- oil outlet
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a fuel injection pump for single-cylinder diesel engines, which comprises an integrated cast fuel injection pump body, the cavity of the pump body is provided with a plunger couple, a regulating gear rack component, a plunger spring, a pusher component, an oil outlet joint, an oil outlet valve couple, a spring upper seat and a spring lower seat, wherein the plunger couple comprises a plunger and a plunger sleeve which are sleeved with each other, a sealing ring is arranged on the plunger sleeve and the shoulder surface of the fuel injection pump body for sealing; the plunger and the plunger sleeve are equipped with the oil outlet valve couple and the oil outlet joint in pressing mode, a flange sleeve is pressed on the joint part between the shoulder of the oil outlet joint and the upper head surface of the fuel injection pump body via a sealing ring; the oil outlet valve couple comprises an oil outlet valve seat and an oil outlet valve, the oil outlet is inserted into the central hole of the oil outlet valve seat; the pusher component comprises a roller seat and a roller, the roller seat is fitted firmly with the lower part of the cavity of the oil injection pump body; the inner diameter end top of the spring upper seat is connected with the lower convex shoulder of the gear rack component. In a fixed assembling space, the diameter of the plunger couple can be enlarged to raise fuel supply of the fuel injection pump, increase the integral strength and reduce the wearing of the roller to the convex wheel.
Description
Technical field
The utility model relates to the diesel injection pump technical field, relates in particular to the single cylinder diesel Injection Pump.
Background technique
Injection Pump is as one of core component of diesel engine, and its major function is regularly to supply with high-pressure diesel to oil sprayer according to certain rules, to obtain good atomization quality.The structural type of Injection Pump has a lot, and at present most widely used is jerk fuel injection pump.Existing injection pump plunger diameter is little, and fuel delivery is few, easily produces thermal distortion during plunger guide bush uses, and plunger is easily stuck, influences the working life of oil pump.
The applying date is the oil pumping system that " oil pumping system of scroll compressor " of the Chinese utility model patent ZL94106813 on June 24th, 1994 discloses a kind of scroll compressor, and its live axle can comprise an impeller.Impurity is imported in the storeroom that is formed by step and oil-feed tank.A plurality of apertures import impurity in the chamber and stop the impurity ejection when fluid move suddenly.In storeroom, a magnet can be arranged.There is the defective that volume is big, oil consumption is high, the oil supply position can not be adjusted in it.
The total kilometres of jerk fuel injection pump plunger motion are constant, the fuel feeding elapsed time is to be controlled by the time that the plunger top edge covers the sleeve upper oil hole, the duration of feeding and fuel delivery cover oilhole by the plunger top edge and control to the time that skewed slot is opened oilhole, are promptly controlled by the effective travel of plunger.The every circuit fuel delivery of Injection Pump depends primarily on the effective travel of plunger.The big more then fuel delivery of this trip is big more.Therefore only need rotary plunger just can change effective travel, to adapt to the needs that diesel load changes.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned deficiency, and the single cylinder diesel that volume is little, oil consumption is low, the oil supply position can be adjusted arbitrarily Injection Pump is provided.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: the single cylinder diesel Injection Pump, comprise the fuel injection pump housing that cast inblock forms, and the pump housing adopts monolithic construction, and to increase the rigidity of the pump housing, the technical measures of taking comprise:
The fuel injection pump housing cavity is fitted with plunger coupled parts, regulating tooth strip assembly, piston spring, push-rod assembly, delivery connection, delivery valve matching parts, the spring seat of honour, spring lower seat mutually;
Plunger coupled parts comprises the plunger and the plunger guide bush of phase suit, and plunger guide bush merges sealing with fuel injection pump housing shoulder face and is equipped with corresponding seal ring; Reach high pressure sealing by the highi degree of accuracy rigid plane, can bear the higher system surge pressure, help high pressure sealing.
The top of plunger and plunger guide bush is pressed with delivery valve matching parts and delivery connection in proper order, and the connecting part of the shoulder of delivery connection and fuel injection pump housing upper-end surface is pressed with the flange cover through the seal ring cover; Delivery valve matching parts comprises delivery valve seat and outlet valve, and outlet valve is inserted into the delivery valve seat center hole;
Push-rod assembly comprises equipped mutually roller base and roller, and roller base close-fitting fuel injection pump housing cavity bottom;
Convex shoulder under the internal diameter end apical grafting regulating tooth strip assembly at the spring seat of honour.
The technical measures of taking also comprise: the last shoulder face of the plunger guide bush of low pressure oil pocket and fuel injection pump housing accompanies seal ring, middle shoulder face accompanies middle seal ring and following shoulder face accompanies lower seal; Has excellent sealing performance.
The via hole boss of fuel injection pump housing cavity of resorption is equipped with the spring seat of honour, and the roller base upper end is equipped with spring lower seat, and the piston spring apical grafting is between the spring seat of honour and spring lower seat.
Plunger diameter is 23mm, and the upper and lower total kilometres of plunger are 24mm.
Compared with prior art, the utility model fuel injection pump housing cavity is fitted with plunger coupled parts, regulating tooth strip assembly, piston spring, push-rod assembly, delivery connection, delivery valve matching parts, the spring seat of honour, spring lower seat mutually; Plunger coupled parts comprises the plunger and the plunger guide bush of phase suit, and plunger guide bush merges sealing with fuel injection pump housing shoulder face and is equipped with corresponding seal ring; Reach high pressure sealing by the highi degree of accuracy rigid plane, can bear the higher system surge pressure, help high pressure sealing; The top of plunger and plunger guide bush is pressed with delivery valve matching parts and delivery connection in proper order, and the connecting part of the shoulder of delivery connection and fuel injection pump housing upper-end surface is pressed with the flange cover through the seal ring cover; Delivery valve matching parts comprises delivery valve seat and outlet valve, and outlet valve is inserted into the delivery valve seat center hole; Push-rod assembly comprises equipped mutually roller base and roller, and roller base close-fitting fuel injection pump housing cavity bottom; Convex shoulder under the internal diameter end apical grafting regulating tooth strip assembly at the spring seat of honour.Under the certain installing space of Injection Pump, increase the diameter of plunger coupled parts as far as possible, can improve the fuel delivery of Injection Pump, increase the bulk strength of Injection Pump, reduce the abrasion of pair of rollers cam.The utility model can reduce the oil consumption and the discharging of diesel engine, satisfies the requirement of PA serial diesel engine to Injection Pump.
Description of drawings
Fig. 1 is the utility model embodiment's a vertical profile structural representation.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Structure of the present utility model is seen shown in Figure 1.The single cylinder diesel Injection Pump comprises the fuel injection pump housing 1 that cast inblock forms, and the pump housing adopts monolithic construction, to increase the rigidity of the pump housing;
Fuel injection pump housing 1 cavity is fitted with plunger coupled parts 2, regulating tooth strip assembly 3, piston spring 4, push-rod assembly 5, delivery connection 6, delivery valve matching parts 7, the spring seat of honour 8, spring lower seat 9 mutually;
Plunger coupled parts 2 comprises the plunger 21 and the plunger guide bush 22 of phase suit, and plunger guide bush 22 merges sealing with fuel injection pump housing 1 shoulder face and is equipped with corresponding seal ring; Reach high pressure sealing by the highi degree of accuracy rigid plane, can bear the higher system surge pressure, help high pressure sealing.
The top of plunger 21 and plunger guide bush 22 is pressed with delivery valve matching parts 7 and delivery connection 6 in proper order, and the connecting part of the shoulder of delivery connection 6 and fuel injection pump housing 1 upper-end surface is pressed with flange cover 10 through seal ring 11 covers; Delivery valve matching parts 7 comprises delivery valve seat 71 and outlet valve 72, and outlet valve 72 is inserted into delivery valve seat 71 center holes;
Push-rod assembly 5 comprises equipped mutually roller base 51 and roller 52, and roller base 51 close-fitting fuel injection pump housings 1 cavity bottom;
3 times convex shoulders of internal diameter end apical grafting regulating tooth strip assembly at the spring seat of honour 8.
The last shoulder face of the plunger guide bush 22 of low pressure oil pocket and fuel injection pump housing 1 accompanies seal ring, middle shoulder face accompanies middle seal ring and following shoulder face accompanies lower seal; Has excellent sealing performance.
The via hole boss of fuel injection pump housing 1 cavity of resorption is equipped with the spring seat of honour 8, and roller base 51 upper ends are equipped with spring lower seat 9, and piston spring 4 apical graftings are between the spring seat of honour 8 and spring lower seat 9.
The key that the utility model is implemented is the pump housing, plunger coupled parts, delivery valve matching parts and driving mechanism.The pump housing is used relevant lathe and frock clamping after casting, finished by machining.Plunger coupled parts and delivery valve matching parts are two secondary precision pairs, and wherein the plunger coupled parts matching gap is 0.008～0.010mm, and surface roughness is Ra0.05mm.Form through grinding and apolegamy, can not exchange, the planeness of outlet valve is 0.002mm, and surface roughness is Ra0.05mm, need grind.The roller pin hole precision is 0.021mm in the roller transmission mechanism, is that 0.02mm can adopt the method for roll extrusion to obtain with the vertical requirement of cylindrical.After the Injection Pump assembling is finished, carry out tests such as oil mass and sealing.
Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.
Claims (4)
1, single cylinder diesel Injection Pump comprises the fuel injection pump housing (1) that cast inblock forms, and it is characterized in that:
Described fuel injection pump housing (1) cavity is fitted with plunger coupled parts (2), regulating tooth strip assembly (3), piston spring (4), push-rod assembly (5), delivery connection (6), delivery valve matching parts (7), the spring seat of honour (8), spring lower seat (9) mutually;
Described plunger coupled parts (2) comprises the plunger (21) and the plunger guide bush (22) of phase suit, and described plunger guide bush (22) merges sealing with described fuel injection pump housing (1) shoulder face and is equipped with corresponding seal ring;
The top of described plunger (21) and plunger guide bush (22) is pressed with described delivery valve matching parts (7) and delivery connection (6) in proper order, and the connecting part of the shoulder of delivery connection (6) and fuel injection pump housing (1) upper-end surface is pressed with flange cover (10) through seal ring (11) cover;
Described delivery valve matching parts (7) comprises delivery valve seat (71) and outlet valve (72), and outlet valve (72) is inserted into delivery valve seat (71) center hole;
Push-rod assembly (5) comprises equipped mutually roller base (51) and roller (52), and the described fuel injection pump housing of roller base (51) close-fitting (1) cavity bottom;
The described regulating tooth strip assembly of internal diameter end apical grafting (3) at the described spring seat of honour (8) is convex shoulder down.
2, single cylinder diesel Injection Pump according to claim 1 is characterized in that: the last shoulder face of described plunger guide bush (22) and fuel injection pump housing (1) accompanies seal ring, middle shoulder face accompanies middle seal ring and following shoulder face accompanies lower seal.
3, single cylinder diesel Injection Pump according to claim 1 and 2, it is characterized in that: the via hole boss of described fuel injection pump housing (1) cavity of resorption is equipped with the described spring seat of honour (8), roller base (51) upper end is equipped with described spring lower seat (9), and piston spring (4) apical grafting is between the spring seat of honour (8) and spring lower seat (9).
4, single cylinder diesel Injection Pump according to claim 3 is characterized in that: described plunger (21) diameter is 23mm, and plunger (21) total kilometres up and down is 24mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620104547 CN2918771Y (en) | 2006-06-12 | 2006-06-12 | Single-cylinder diesel engine oil spouting pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620104547 CN2918771Y (en) | 2006-06-12 | 2006-06-12 | Single-cylinder diesel engine oil spouting pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2918771Y true CN2918771Y (en) | 2007-07-04 |
Family
ID=38216588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620104547 Expired - Fee Related CN2918771Y (en) | 2006-06-12 | 2006-06-12 | Single-cylinder diesel engine oil spouting pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2918771Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694192B (en) * | 2009-08-20 | 2011-08-10 | 余姚市舒春机械有限公司 | Plunger and barrel assembly of oil injection pump of marine diesel engine |
-
2006
- 2006-06-12 CN CN 200620104547 patent/CN2918771Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694192B (en) * | 2009-08-20 | 2011-08-10 | 余姚市舒春机械有限公司 | Plunger and barrel assembly of oil injection pump of marine diesel engine |
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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: 20070704 Termination date: 20140612 |