CN219774245U - Injection pump for six-cylinder diesel engine - Google Patents
Injection pump for six-cylinder diesel engine Download PDFInfo
- Publication number
- CN219774245U CN219774245U CN202320365288.7U CN202320365288U CN219774245U CN 219774245 U CN219774245 U CN 219774245U CN 202320365288 U CN202320365288 U CN 202320365288U CN 219774245 U CN219774245 U CN 219774245U
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- plunger
- cam
- outlet valve
- tappet
- oil
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- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 claims abstract description 37
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000005461 lubrication Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 84
- 239000002283 diesel fuel Substances 0.000 description 6
- 239000010705 motor oil Substances 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
The utility model provides an oil injection pump for a six-cylinder diesel engine, which comprises a pump body, six mounting holes vertically arranged at the top of the pump body, and a cam shaft arranged at the bottom of the pump body, wherein an oil outlet valve assembly, a plunger matching part and a tappet body assembly are sequentially arranged in the mounting holes from top to bottom, an adjusting gear ring for adjusting oil supply quantity is sleeved outside the plunger matching part, a toothed bar is arranged on the side part of the pump body and is connected with the adjusting gear ring, a cam is arranged on the cam shaft, the bottom of the tappet body assembly is abutted with the cam, the upper part of the tappet body assembly is connected with the plunger matching part, the tappet body assembly comprises a columnar tappet shell and balls arranged at one end of the tappet shell, and a cam groove for accommodating the balls is annularly arranged on the side part of the cam. According to the fuel injection pump for the six-cylinder diesel engine, provided by the utility model, through the combination of the novel cam shaft and the tappet body assembly, the lubrication effect is good, the abrasion of the cam is reduced, and the operation efficiency of the fuel injection pump is improved.
Description
Technical Field
The utility model belongs to the technical field of fuel injection pumps, and particularly relates to a fuel injection pump for a six-cylinder diesel engine.
Background
The fuel injection pump is one of the most important components in the fuel supply system of the diesel engine, and has the function of delivering quantitative diesel oil to the fuel injector at a certain high pressure at a specified moment according to the working requirement of the diesel engine, and mainly comprises four parts of a fuel pumping mechanism, a fuel supply amount adjusting mechanism, a driving mechanism and a fuel injection pump body, wherein the fuel pumping mechanism comprises a plunger matching part, an oil outlet valve assembly and the like, the fuel supply amount adjusting mechanism comprises a rack type fuel amount adjusting mechanism or a shifting fork type fuel amount adjusting mechanism, the driving mechanism comprises a cam shaft, a tappet assembly and the like, and the fuel injection pump body is an installation matrix of the three parts.
In the driving mechanism of the existing diesel engine fuel injection pump, a cam contacted with a tappet body component is arranged on a cam shaft, and centrifugal force is generated due to high-speed rotation of the cam, so that an oil film on the surface of the cam cannot be uniformly distributed, and the spraying quantity of engine oil possibly cannot keep up with the consumption quantity when the engine oil is contacted with the tappet body component, so that abnormal abrasion of the cam is caused.
The lubricating effect of the existing diesel engine fuel injection pump cam and tappet body component is poor, the cam is seriously worn, and the technical problem is solved.
Disclosure of Invention
The utility model aims to provide an oil injection pump for a six-cylinder diesel engine, which solves the technical problems of poor lubrication effect and serious cam abrasion of an oil injection pump cam and a tappet body assembly of the diesel engine, has good lubrication effect by combining a novel cam shaft and the tappet body assembly, reduces the abrasion of the cam and improves the operation efficiency of the oil injection pump.
The utility model provides an oil injection pump for six jar diesel engine, is in including the pump body, vertical setting six mounting holes at pump body top, setting are in the camshaft of pump body bottom, from the top down installs oil outlet valve subassembly, plunger pair spare, tappet body subassembly in proper order in the mounting hole, the outside cover of plunger pair spare is equipped with the regulation ring gear that is used for adjusting the oil feed amount, the lateral part of pump body is provided with the rack bar, the rack bar with adjust the ring gear and be connected, be provided with the cam on the camshaft, tappet body subassembly's bottom with the cam butt, upper portion with the plunger pair spare is connected, tappet body subassembly includes columnar tappet casing and sets up tappet casing one end's ball, the lateral part annular of cam is provided with the holding the cam groove of ball.
One end of the cam shaft is provided with a transmission gear, the other end of the cam shaft is connected with a speed regulator, an oil storage cavity is arranged in the cam shaft, an oil outlet duct communicated with the oil storage cavity is arranged on the cam groove, and a rotary joint communicated with the oil storage cavity is arranged at one end of the cam shaft, which is close to the transmission gear.
The tappet housing comprises an upper housing and a lower housing, wherein the upper housing is in butt joint with the plunger coupling part, the lower housing is arranged below the upper housing, a ball cavity penetrating through the outer surface is formed in the lower housing, and the ball is arranged in the ball cavity and is in butt joint with the cam groove.
The surface of the ball is annularly provided with a plurality of ball grooves, and the number of the ball grooves is not less than two.
The oil outlet valve assembly comprises an oil outlet valve and an oil outlet valve seat supported at the lower part of the oil outlet valve, and the oil outlet valve seat is abutted with the plunger coupling;
the upper portion of delivery valve is provided with delivery valve and compresses tightly the seat, delivery valve with be provided with the delivery valve spring between the delivery valve compresses tightly the seat, delivery valve compress tightly the seat with pump body coupling.
The plunger coupling part comprises a plunger and a plunger sleeve sleeved outside the plunger;
the plunger sleeve is movably sleeved with a control sleeve, the adjusting gear ring is fixedly sleeved on the control sleeve, the lower end of the control sleeve is provided with a square groove, and the square groove is connected with the side protruding part of the plunger;
the plunger spring upper seat is arranged below the adjusting gear ring, the plunger spring lower seat is arranged on the side portion below the plunger, and a plunger spring is arranged between the plunger spring upper seat and the plunger spring lower seat.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The cam shaft is provided with an oil storage cavity, the cam surface is provided with an oil outlet channel communicated with the oil storage cavity, the cam surface is lubricated through the oil outlet channel, the cam surface is provided with cam grooves for accommodating balls, thicker oil films are stored through the grooves, the tappet body assembly is provided with the balls, the balls are provided with a plurality of ball grooves, and the lubricating oil is brought to the tappet body assembly through the ball grooves for lubrication, so that the lubricating effect of the cam and the tappet body assembly is improved;
(2) The contact surface of the tappet body component and the cam is arc-shaped, so that the contact surface is larger, the impact force of the cam on the tappet body component is reduced, the abrasion of the cam is lightened, and the service lives of the tappet body component and the cam are prolonged;
(3) The tappet body component comprises a tappet shell and balls, is simple in structure and small in size, reduces the operation load of the cam shaft, and improves the operation efficiency of the oil injection pump.
Drawings
Fig. 1 is a transverse cross-sectional view of the present utility model.
Fig. 2 is a schematic view of the external structure of the present utility model.
Fig. 3 is a schematic view of the structure of the camshaft of the present utility model.
Fig. 4 is a transverse cross-sectional view of the cam and tappet assembly of the present utility model.
Fig. 5 is a schematic view of the ball structure of the present utility model.
Fig. 6 is an exploded view of the adjusting ring gear and plunger coupling of the present utility model.
Wherein, in the figure: 1. a pump body; 2. a cam shaft; 2-1, an oil storage cavity; 2-2, a transmission gear; 3. The oil outlet valve compresses tightly the seat; 4. an oil outlet valve spring; 5. an outlet valve assembly; 5-1, an oil outlet valve; 5-2, an oil outlet valve seat; 6. plunger coupling parts; 6-1, a plunger sleeve; 6-2, a plunger; 6-3, side protruding parts; 7. adjusting the gear ring; 8. a control sleeve; 9. A toothed bar; 10. a plunger spring upper seat; 11. a plunger spring; 12. a plunger spring lower seat; 13. a tappet body assembly; 13-1, tappet housing; 13-2, balls; 13-3, an upper shell; 13-4, a lower shell; 13-5, ball grooves; 14. a camshaft support; 15. a cam; 15-1, cam groove; 15-2, an oil outlet duct; 16. and (5) rotating the joint.
Detailed Description
In order to more clearly describe the technical characteristics of the present solution, the present solution is described below by means of specific embodiments.
Referring to fig. 1-6, an oil injection pump for a six-cylinder diesel engine comprises a pump body 1, six mounting holes vertically arranged at the top of the pump body 1, and a cam shaft 2 arranged at the bottom of the pump body 1, wherein an oil outlet valve assembly 5, a plunger matching part 6 and a tappet body assembly 13 are sequentially arranged in the mounting holes from top to bottom, an adjusting gear ring 7 for adjusting oil supply is sleeved outside the plunger matching part 6, a toothed bar 9 is arranged at the side part of the pump body 1, and the toothed bar 9 is connected with the adjusting gear ring 7;
the cam shaft 2 is provided with a cam 15, the bottom of the tappet body assembly 13 is abutted with the cam 15, the upper part of the tappet body assembly 13 is connected with the plunger matching piece 6, the tappet body assembly 13 comprises a columnar tappet shell 13-1 and balls 13-2 arranged at one end of the tappet shell 13-1, and a cam groove 15-1 for accommodating the balls 13-2 is annularly arranged at the side part of the cam 15.
One end of the cam shaft 2 is provided with a transmission gear 2-2, the other end of the cam shaft 2 is connected with a speed regulator, an oil storage cavity 2-1 is arranged in the cam shaft 2, an oil outlet duct 15-2 communicated with the oil storage cavity 2-1 is arranged on the cam groove 15-1, one end, close to the transmission gear 2-2, of the cam shaft 2 is provided with a rotary joint 16 communicated with the oil storage cavity 2-1, and the other end of the rotary joint 16 is fixedly connected with a diesel engine;
the camshaft 2 is arranged on a camshaft support 14, and the camshaft support 14 is connected to the pump body 1.
The tappet housing 13-1 comprises an upper housing 13-3 abutted with the plunger coupling piece 6 and a lower housing 13-4 arranged below the upper housing 13-3, a ball cavity penetrating through the outer surface is formed in the lower housing 13-4, and the ball 13-2 is arranged in the ball cavity and abutted with the cam groove 15-1.
The surface of the ball 13-2 is annularly provided with a plurality of ball grooves 13-5, and the number of the ball grooves 13-5 is not less than two.
The oil outlet valve assembly 5 comprises an oil outlet valve 5-1 and an oil outlet valve seat 5-2 supported at the lower part of the oil outlet valve 5-1, and the oil outlet valve seat 5-2 is abutted with the plunger coupling part 6;
the upper portion of the oil outlet valve 5-1 is provided with an oil outlet valve compressing seat 3, an oil outlet valve spring 4 is arranged between the oil outlet valve 5-1 and the oil outlet valve compressing seat 3, and the oil outlet valve compressing seat 3 is connected with the pump body 1.
The plunger matching part 6 comprises a plunger 6-2 and a plunger sleeve 6-1 sleeved outside the plunger;
the outside of the plunger sleeve 6-1 is movably sleeved with a control sleeve 8, an adjusting gear ring 7 is fixedly sleeved on the control sleeve 8, the lower end of the control sleeve 8 is provided with a square groove, and the square groove is connected with a side protruding part 6-3 of the plunger 6-2;
a plunger spring upper seat 10 is arranged below the adjusting gear ring 7, a plunger spring lower seat 12 is arranged on the side part below the plunger 6-2, and a plunger spring 11 is arranged between the plunger spring upper seat 10 and the plunger spring lower seat 12.
The specific working process of the utility model comprises the following steps:
after the oil injection pump is provided with the speed regulator, the oil injection pump assembly is arranged on the diesel engine, when the diesel engine runs, the cam shaft 2 is driven to rotate through the transmission gear 2-2, the cam shaft 2 drives the cam 15 to contact the ball 13-2 of the tappet body assembly 13, the ball 13-2 drives the tappet body assembly 13 to reciprocate up and down, and then the plunger 7 is driven to reciprocate up and down under the action of the tappet body assembly 13 and the plunger spring 11;
when the cam 15 rises in the rising section, diesel oil enters the plunger sleeve 9 from the low-pressure oil cavity through the oil inlet hole, the plunger 7 moves upwards, when the plunger 7 rises to a certain height, the head of the plunger 7 seals the oil inlet hole and further presses the plunger sleeve 6-1, high-pressure fuel starts to be generated, when the pressure of the high-pressure fuel is larger than the pretightening force of the oil outlet valve spring 4, the oil outlet valve 5-1 is opened, the high-pressure fuel flows through the oil outlet valve pressing seat 3 through a gap between the oil outlet valve 5-1 and the oil outlet valve seat 5-2, and then the high-pressure diesel oil is injected into a diesel engine cylinder through the oil injector, and the diesel engine performs combustion work;
the plunger 7 continues to ascend, the oil injection pump continues to supply oil, when the plunger 7 ascends to the position that the plunger head chute is communicated with the oil return hole of the plunger sleeve 6-1, the oil supply is finished, the oil return hole is communicated with the chute, high-pressure oil at the upper part of the plunger 7 flows into the low-pressure oil cavity through the plunger 7 oil hole and the chute, the pressure of diesel oil is rapidly reduced, the oil outlet valve 5-1 falls into the oil outlet valve seat 5-2 under the action of the oil outlet valve spring 4, and the oil injection pump stops supplying oil at the moment;
when the toothed bar 9 moves left and right, the adjusting gear ring 7 is driven to rotate, the adjusting gear ring 7 drives the side protruding part 6-3 of the plunger 7 through the square groove of the control sleeve 8, the plunger 7 is driven to rotate, the relative position of the chute at the head of the plunger 7 and the oil inlet hole of the plunger sleeve 9 is changed, namely the effective pressure oil stroke is changed, the oil supply quantity of the plunger 7 is further changed, and the oil quantity requirement of diesel engines with different powers can be met;
when the cam 15 is in the descending section, the plunger 6-2 moves downwards under the action of the plunger spring 11, and when the upper end of the plunger 7 is lower than the oil inlet hole, the oil inlet hole on the plunger sleeve 6-1 is opened, fuel enters the interior of the plunger sleeve 6-1 through the oil hole on the plunger sleeve 6-1, and oil starts to be filled into the plunger sleeve 6-1, so that the fuel injection pump completes a working cycle;
engine oil enters an oil storage cavity 2-1 in a cam shaft 2 through a rotary joint 16, the engine oil is thrown out from an oil outlet hole 15-2 into a cam groove 15-1 on the surface of a cam 15 through the rotary centrifugal action of the cam shaft 2, the cam 15 presses a ball 13-2 of a tappet body assembly 13, the ball 13-2 rotates and brings engine oil in the cam groove 15-1 into the tappet body assembly 13 through a ball groove 13-5 to lubricate the ball 13-2, meanwhile, the ball 13-2 transmits supporting force from the cam 15 to a plunger 7, and then the plunger 7 transmits oil through high-pressure diesel oil to an oil valve 5-1, so that the oil outlet valve 5-1 ejects high-pressure diesel oil, and the diesel engine performs fuel oil acting.
The technical features of the present utility model that are not described in the present utility model may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present utility model, and the present utility model is not limited to the above examples, but is also intended to be within the scope of the present utility model by those skilled in the art.
Claims (6)
1. The utility model provides an injection pump for six jar diesel engine, is in including pump body (1), vertical setting six mounting holes at pump body (1) top, setting are in camshaft (2) of pump body (1) bottom, install oil outlet valve subassembly (5), plunger pair (6), tappet body subassembly (13) from the top down in the mounting hole in proper order, the outside cover of plunger pair (6) is equipped with and is used for adjusting regulation ring gear (7) of fuel feeding, the lateral part of pump body (1) is provided with rack bar (9), rack bar (9) with adjust ring gear (7) and be connected, be provided with cam (15) on camshaft (2), the bottom of tappet body subassembly (13) with cam (15) butt, upper portion with plunger pair (6) are connected, its characterized in that, tappet body subassembly (13) are including columnar tappet casing (13-1) and setting up ball (13-2) of tappet casing (13-1) one end, the lateral part of cam (15) annular is provided with hold cam (15-1) recess (15-2).
2. The fuel injection pump for the six-cylinder diesel engine according to claim 1, wherein one end of the cam shaft (2) is provided with a transmission gear (2-2), the other end of the cam shaft (2) is connected with a speed regulator, a fuel storage cavity (2-1) is arranged in the cam shaft (2), a fuel outlet duct (15-2) communicated with the fuel storage cavity (2-1) is arranged on the cam groove (15-1), and a rotary joint (16) communicated with the fuel storage cavity (2-1) is arranged at one end, close to the transmission gear (2-2), of the cam shaft (2);
the camshaft (2) is arranged on a camshaft support (14), and the camshaft support (14) is connected with the pump body (1).
3. The fuel injection pump for a six-cylinder diesel engine according to claim 1, wherein the tappet housing (13-1) comprises an upper housing (13-3) abutting against the plunger coupling element (6), and a lower housing (13-4) provided below the upper housing (13-3), a ball cavity penetrating through the outer surface is provided inside the lower housing (13-4), and the ball (13-2) is provided in the ball cavity and abuts against the cam groove (15-1).
4. A fuel injection pump for a six-cylinder diesel engine according to claim 1, characterized in that the surface of the ball (13-2) is annularly provided with a plurality of ball grooves (13-5), the number of the ball grooves (13-5) being not less than two.
5. The fuel injection pump for a six-cylinder diesel engine according to claim 1, wherein the fuel outlet valve assembly (5) comprises a fuel outlet valve (5-1) and a fuel outlet valve seat (5-2) supported at the lower part of the fuel outlet valve (5-1), and the fuel outlet valve seat (5-2) is abutted with the plunger coupling (6);
the oil outlet valve pressing seat (3) is arranged on the upper portion of the oil outlet valve (5-1), an oil outlet valve spring (4) is arranged between the oil outlet valve (5-1) and the oil outlet valve pressing seat (3), and the oil outlet valve pressing seat (3) is connected with the pump body (1).
6. The fuel injection pump for the six-cylinder diesel engine according to claim 1, wherein the plunger coupling element (6) comprises a plunger (6-2) and a plunger sleeve (6-1) sleeved outside the plunger;
the plunger sleeve (6-1) is movably sleeved with a control sleeve (8), the adjusting gear ring (7) is fixedly sleeved on the control sleeve (8), a square groove is formed in the lower end of the control sleeve (8), and the square groove is connected with the side protruding part (6-3) of the plunger (6-2);
the plunger spring adjusting device is characterized in that a plunger spring upper seat (10) is arranged below the adjusting gear ring (7), a plunger spring lower seat (12) is arranged on the side portion below the plunger (6-2), and a plunger spring (11) is arranged between the plunger spring upper seat (10) and the plunger spring lower seat (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320365288.7U CN219774245U (en) | 2023-03-02 | 2023-03-02 | Injection pump for six-cylinder diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320365288.7U CN219774245U (en) | 2023-03-02 | 2023-03-02 | Injection pump for six-cylinder diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774245U true CN219774245U (en) | 2023-09-29 |
Family
ID=88102441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320365288.7U Active CN219774245U (en) | 2023-03-02 | 2023-03-02 | Injection pump for six-cylinder diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774245U (en) |
-
2023
- 2023-03-02 CN CN202320365288.7U patent/CN219774245U/en active Active
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