CN212202313U - Distribution pump plunger with oil outlet valve - Google Patents
Distribution pump plunger with oil outlet valve Download PDFInfo
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- CN212202313U CN212202313U CN201921603210.4U CN201921603210U CN212202313U CN 212202313 U CN212202313 U CN 212202313U CN 201921603210 U CN201921603210 U CN 201921603210U CN 212202313 U CN212202313 U CN 212202313U
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- shaft hole
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Abstract
The utility model discloses a distribution pump plunger with an oil outlet valve, which is driven by a cam disc to do reciprocating and rotating motion in a distribution sleeve, wherein, the reciprocating motion leads fuel oil to be pressurized in a high-pressure oil cavity, and the rotating motion carries out fuel oil distribution; the plunger is also provided with: the oil outlet valve mounting hole is arranged at one end, extending into the high-pressure oil cavity, of the plunger along the axis direction of the plunger, is used for mounting the oil outlet valve, and comprises a first shaft hole and a second shaft hole which are coaxially arranged with the plunger, and a ring groove connected between the first shaft hole and the second shaft hole; the tail part of the oil outlet valve mounting hole is connected with the plunger distribution groove through an inclined oil duct; the plunger is provided with a plunger pressure relief groove and an oil inlet groove, wherein the plunger pressure relief groove is connected with the oil inlet groove through an oil drainage channel; and the oil quantity control sleeve is sleeved at one end of the plunger, which is far away from the high-pressure oil cavity, and is used for opening or closing the plunger pressure relief groove when the plunger reciprocates to realize the control of the oil supply quantity.
Description
Technical Field
The utility model discloses a VE dispensing pump component specifically is a dispensing pump plunger who is equipped with delivery valve.
Background
In the VE pump fuel oil system, an oil outlet valve is arranged between an oil pump and a high-pressure oil pipe. The oil outlet valve is similar to a one-way valve in function, when the oil pump supplies oil, the oil outlet valve is opened in the positive direction, the oil pump supplies oil to the high-pressure oil pipe, and the pressure at the end of the oil sprayer rises rapidly and oil injection begins. When the oil supply is finished, the valve core of the oil outlet valve is seated, and meanwhile, the high-pressure oil pipe is ensured to participate in rapid pressure reduction, so that the rapid closing of the oil injector is realized, and the oil injection is stopped.
The working process of the oil outlet valve is as follows: when the oil pump starts to supply oil, the pressure of an oil inlet at the bottom of the oil outlet valve rises, the damping valve is pushed to overcome the spring force of the damping valve spring to move upwards, the damping valve is separated from the contact surface of the valve seat and is ended at the limiting surface of the limiter, and at the moment, fuel oil can flow into the limiter from an oil way on the limiter and flows out of the oil outlet valve to supply oil to the high-pressure oil pipe. When oil supply is finished, the damping valve moves downwards under the action of the spring force of the damping spring and is attached to the oil outlet valve seat, the oil outlet valve is closed, and residual pressure oil in the high-pressure oil pipe flows out of the damping hole in the damping valve, so that the oil sprayer stops oil injection quickly, and certain pressure is ensured to exist in the high-pressure oil pipe.
Because each cylinder is provided with an oil outlet valve, the difference of the oil outlet valves of the cylinders can cause the difference of the oil supply quantity of each cylinder, and the oil supply uniformity of the oil pump is poor. And the quantity of the oil outlet valves is large, and the manufacturing cost is high. Taking a four-cylinder injection pump as an example, 4 oil outlet valves are installed on one oil pump.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a dispensing pump plunger of new construction, this dispensing pump plunger can improve each jar homogeneity of VE type dispensing pump, reduces manufacturing cost simultaneously.
In order to realize the technical purpose, the utility model adopts the following technical scheme:
a distribution pump plunger with an oil outlet valve is driven by a cam disc to reciprocate and rotate in a distribution sleeve, wherein the reciprocating motion enables fuel oil to be pressurized in a high-pressure oil cavity, and the rotating motion distributes the fuel oil;
the high-pressure oil cavity is enclosed by a plunger, a distribution sleeve and a pump head plug screw, and the plunger is further provided with:
the oil outlet valve mounting hole is arranged at one end, extending into the high-pressure oil cavity, of the plunger along the axis direction of the plunger, is used for mounting the oil outlet valve, and comprises a first shaft hole and a second shaft hole which are coaxially arranged with the plunger, and a ring groove connected between the first shaft hole and the second shaft hole;
the oil outlet valve comprises a spring, a damping valve core and an oil outlet valve seat, wherein a spring mounting hole is formed in the left end of the damping valve core, the spring is mounted in the spring mounting hole of the damping valve core, a small damping hole is formed in the right end of the damping valve core, and 4 oil inlet holes 3.2.2 are radially designed in the bottom of the spring mounting hole. The damping valve core is arranged in a first shaft hole of the plunger, the damping valve core can move left and right, the first shaft hole plays a role in guiding, and the bottom of the first shaft hole plays a role in limiting;
an oil outlet valve seat is installed in the second shaft hole, two pin holes which are symmetrically arranged are axially formed in the second shaft hole, and the oil outlet valve seat is fixed in the second shaft hole of the plunger through two pins;
one end of a spring arranged in a hole on the left side of the damping valve core is contacted with the bottom of the first shaft hole, the other end of the spring is contacted with the bottom of a spring hole of the damping valve core, and the damping valve core is pressed towards the right side by the spring force to the end face of the oil outlet valve seat;
the tail part of the oil outlet valve mounting hole is connected with the plunger distribution groove through an inclined oil duct;
the plunger is provided with a plunger pressure relief groove and an oil inlet groove, wherein the plunger pressure relief groove is connected with the oil inlet groove through an oil drainage channel;
and the oil quantity control sleeve is sleeved at one end of the plunger, which is far away from the high-pressure oil cavity, and is used for opening or closing the plunger pressure relief groove when the plunger reciprocates to realize the control of the oil supply quantity.
The oil drainage channel comprises two oil drainage channel units, and is respectively an edge of a first oil drainage channel unit radially arranged by the plunger and a second oil drainage channel unit connected between the first oil drainage channel unit and the bottom of the oil inlet groove of the plunger.
The conical surface sealing is adopted between the distribution shell and the oil outlet valve tight seat.
Has the advantages that:
the utility model relates to a distribution pump plunger of delivery valve is equipped with compares current plunger structure, has following several advantages:
the utility model discloses simplify the structure of damping delivery valve, cancelled the stopper of delivery valve to install delivery valve in the plunger, realized the function of each jar fuel feeding of a delivery valve control oil pump.
The oil pump sprays oil with the same plunger and the same oil outlet valve each time, so that the difference of each cylinder is reduced, and the oil spraying uniformity of the oil pump is improved; meanwhile, the using quantity of the oil outlet valves is reduced, and the manufacturing cost is reduced.
3. The conical surface sealing is adopted between the distribution shell and the oil outlet valve tight seat to replace the original copper gasket sealing, so that the manufacturing cost is reduced.
Drawings
FIG. 1 is a diagram of the oil path of the pump head of a plunger of a dispensing pump equipped with an oil outlet valve according to the present invention;
wherein, 3.1, plunger; 3.2, a damping valve core; 3.4, an oil outlet valve seat; 3.1.1, plunger oil inlet groove; 3.1.5, plunger distribution groove; 3.1.7, plunger pressure relief groove; (A, B, C, D) a high pressure oil line;
FIG. 2 is a schematic structural view of the distribution pump with an oil outlet valve according to the present invention;
1.4, distributing an oil passage in the shell; 1.5, a conical surface sealing structure is arranged between the distribution shell and the oil outlet valve tight seat;
2.2, a high-pressure oil cavity; 2.3, distributing an oil supply passage in the sleeve;
3.1.3, a ring groove; 3.1.4, an inclined oil channel at the tail part of the oil outlet valve mounting hole;
3.2.2, 4 oil inlet holes are radially arranged at the bottom of the damping valve core spring mounting hole; 3.2.3, spring mounting holes;
3.4.1, an oil passage in the oil outlet valve seat;
4.1, an oil passage in the oil outlet valve tight seat;
FIG. 3 is a schematic structural view of the distribution pump with the delivery valve of the present invention during oil filling;
wherein, 1, a distribution shell;
1.1, distributing an oil inlet hole in the shell; 1.2, oil inlet solenoid valve mounting holes; 1.3, filling a valve seat hole;
2. a dispensing sleeve; 2.1, distributing an oil inlet hole in the sleeve;
3.3, a spring; 3.5, a pin;
4. the oil outlet valve is tightly seated; 5. a pump head plug screw; 6. a deflating screw;
FIG. 4 is a schematic structural view of the dispensing pump equipped with an oil outlet valve according to the present invention at the end of oil supply;
3.1.1, plunger oil inlet groove; 3.1.2, a second oil drainage channel unit connected between the first oil drainage channel unit and the bottom of the plunger oil inlet groove; 3.1.6, a first oil drainage channel unit;
3.2.1, damping small holes in the valve core;
7. an oil quantity control sleeve;
FIG. 5 is a partial enlarged view of the outlet valve on the plunger of the dispensing pump equipped with the outlet valve of the present invention;
fig. 6 is the utility model discloses plunger oil feed tank and distribution sleeve inlet port schematic diagram, the oil feed tank is not expert at with the inlet port this moment, and the oil feed is ended.
Detailed Description
The utility model discloses a distribution pump plunger of new construction to tight seat of delivery valve and damping valve innovative design, with the delivery valve assembly in the plunger, the innovative design fuel oil circuit has realized this novel plunger, replaces the function of four delivery valves of original structure through a delivery valve.
Example 1
A distribution pump plunger with an oil outlet valve is driven by a cam disc to reciprocate and rotate in a distribution sleeve, wherein the reciprocating motion enables fuel oil to be pressurized in a high-pressure oil cavity, and the rotating motion distributes the fuel oil;
the high-pressure oil cavity is enclosed by plunger 3.1, distribution sleeve 2 and pump head plug screw 5 three, still be equipped with on the plunger 3.1: the oil outlet valve mounting hole is arranged at one end, extending into the high-pressure oil cavity, of the plunger 3.1 along the axis direction of the plunger 3.1 and used for mounting the oil outlet valve, and comprises a first shaft hole and a second shaft hole which are coaxially arranged with the plunger and a ring groove connected between the first shaft hole and the second shaft hole;
the oil outlet valve comprises an oil outlet valve seat 3.4, a damping valve core 3.2 and a spring 3.3, wherein the left side of the damping valve core 3.2 is provided with a spring mounting hole 3.2.3, the bottom of the spring mounting hole 3.2.3 is provided with 4 oil inlet holes 3.2.2 in the radial direction, and the damping hole 3.2.1 on the right side of the valve core, the spring is mounted in the spring mounting hole 3.2.3, one end of the spring is in abutting connection with the bottom of the spring mounting hole 3.2.3, the other end of the spring is connected with the bottom of the first oil hole of the plunger, the other end of the damping valve core 3.2 is connected with one end of the oil outlet valve seat 3.4 mounted in the second shaft hole under the action of the spring, and the other end of the oil outlet; the annular groove is used for high-pressure oil to flow through;
the tail part of the oil outlet valve mounting hole is connected with the plunger distribution groove through an inclined oil duct; in this embodiment, there is one oil supply groove and one corresponding inclined oil passage.
The other oblique oil groove at the tail part of the oil outlet valve mounting hole is connected with the pressure balance groove, and the angle between the pressure balance groove and the oil supply groove ensures that the pressure balance groove is not communicated when the oil supply groove is communicated with a certain oil hole of the distribution sleeve. When the plunger moves leftwards and the high-pressure cavity of the plunger feeds oil, the pressure balance groove is communicated with the high-pressure oil hole of a certain matching barrel, the high-pressure oil pipe connected with the pressure balance groove is communicated with the high-pressure cavity of the plunger through the damping hole of the oil outlet valve core, and the pressure in the high-pressure oil pipe is kept consistent before oil supply.
The plunger is provided with a plunger pressure relief groove and an oil inlet groove, wherein the plunger pressure relief groove is connected with the oil inlet groove through an oil drainage channel; in this embodiment, the number of the plunger pressure relief grooves is two, the number of the oil inlet grooves is 4, two symmetrical oil inlet grooves are connected with the plunger pressure relief grooves through one inclined oil path, and the other two oil inlet grooves are provided with a pin hole in the radial direction respectively for fixing the oil outlet valve seat to ensure that the oil outlet valve seat does not fall off from the plunger; in this embodiment, the oil drainage channel includes two oil drainage channel units, follows respectively the first oil drainage channel unit that the plunger radially set up and set up to be connected in the plunger be the second oil drainage channel unit that the slope set up between first oil drainage channel unit and the plunger oil feed tank bottom portion.
And the oil quantity control sleeve is sleeved at one end of the plunger, which is far away from the high-pressure oil cavity, and is used for opening or closing the plunger pressure relief groove when the plunger reciprocates to realize the control of the oil supply quantity.
Example 1 the working process of a dispensing pump plunger equipped with a delivery valve is as follows:
the oil filling process is shown in figure 2, at this time, the plunger rotates to a certain oil inlet groove 3.1.1 to be communicated with the oil inlet hole 2.1 of the distribution sleeve. At the same time, the plunger moves leftwards, and the high-pressure oil chamber 2.2 enclosed by the pump head screw plug and the distribution sleeve becomes larger in volume. The fuel oil sequentially passes through an oil inlet hole 1.1, an oil inlet solenoid valve mounting hole 1.2, an oil inlet valve seat hole 1.3, an oil inlet hole 2.1 in the distribution sleeve and an oil inlet groove 3.1.1 in the plunger to enter a high-pressure oil cavity 2.2, and the oil filling process of the plunger is completed.
The oil supply process is shown in figure 3, at the moment, the plunger 3.1 rotates by a certain angle, and the oil inlet groove 3.1.1 is not communicated with the oil inlet hole 2.1 of the distribution sleeve; the oil quantity control sleeve 7 closes the plunger pressure relief groove 3.1.7 in the plunger; the oil supply groove 3.1.5 in the plunger 3.1 communicates with a certain distribution oil channel 2.3 in the distribution sleeve 2. At the same time, the plunger 3.1 moves rightward, the volume of the high-pressure oil chamber 2.2 decreases, and the fuel pressure in the high-pressure oil chamber 2.2 increases. High-pressure fuel enters from an oil passage 3.4.1 in the fuel outlet valve seat and pushes the damping valve core 3.2 to move leftwards against the spring force of the spring 3.3, the fuel outlet valve is opened, the fuel flows into the annular groove 3.1.3 from a valve port between the fuel outlet valve seat 3.4 and the damping valve core 3.2, the fuel continues to flow into the first shaft hole 3.2.3 of the damping valve core 3.2 through 4 oil inlet holes 3.2.2 in the damping valve core 3.2 and flows into the plunger fuel supply oil passage 3.1.4, and flows into a certain fuel supply oil passage 2.3 in the distribution sleeve 2 through the fuel supply groove 3.1.5, the oil passages are communicated with corresponding oil passages in the distribution shell, and finally pass through the oil passage 4.1 in the fuel outlet valve fastening seat, and the fuel supply process to a downstream high-pressure fuel pipe.
When the plunger continuously moves rightwards until the plunger pressure relief groove 3.1.7 in the plunger 3.1 leaks out of the sealing surface of the oil quantity control sleeve 7, at the moment, the high-pressure oil cavity 2.2 is communicated with an external low-pressure cavity through the oil inlet groove 3.1.1, the second oil drainage channel unit 3.1.2 and the first oil drainage channel unit 3.1.6, fuel oil quickly flows outwards from the plunger pressure relief groove, the pressure of the plunger high-pressure cavity is quickly reduced, the damping valve core moves rightwards to the valve seat surface of the oil outlet valve seat 3.4, and the oil outlet valve is closed. At the moment, the oil on the oil way of the oil injector and the high-pressure oil pipe is still communicated with the oil outlet valve, and the fuel oil with residual pressure in the high-pressure oil pipe can slowly flow into the high-pressure oil cavity 2.2 through the damping hole 3.2.1 in the valve core. The pressure in the high-pressure oil pipe is ensured to be reduced rapidly, the oil injector is closed rapidly, meanwhile, a certain pressure can be kept in the high-pressure oil pipe after oil supply is finished, and the effective lift of the plunger during next oil supply is reduced.
Example 2
The difference between the embodiment and the embodiment 1 lies in the arrangement of the oil drainage channel, an oil hole coaxial with the plunger is drilled in the oil drainage channel in the embodiment instead of the left side of the plunger, the oil hole is connected with the oil drainage groove and is respectively communicated with the tail parts of the oil inlet grooves at two symmetrical positions through two shorter symmetrical inclined holes, and the left section of the straight hole is closed through a plug.
The oil outlet valve seat is fixed on the plunger piston by a pin 3.5, and threads can also be processed in the plunger piston to screw the oil outlet valve seat in the plunger piston.
Claims (3)
1. A distribution pump plunger with an oil outlet valve is driven by a cam disc to reciprocate and rotate in a distribution sleeve, wherein the reciprocating motion enables fuel oil to be pressurized in a high-pressure oil cavity, and the rotating motion distributes the fuel oil;
the high-pressure oil cavity is enclosed by a plunger, a distribution sleeve and a pump head plug screw, and the high-pressure oil cavity is characterized in that the plunger is further provided with:
the oil outlet valve mounting hole is arranged at one end, extending into the high-pressure oil cavity, of the plunger along the axis direction of the plunger, is used for mounting the oil outlet valve, and comprises a first shaft hole and a second shaft hole which are coaxially arranged with the plunger, and a ring groove connected between the first shaft hole and the second shaft hole;
the oil outlet valve comprises a spring, a damping valve core and an oil outlet valve seat, wherein the left end of the damping valve core is provided with a spring mounting hole, the spring is arranged in the spring mounting hole of the damping valve core, the right end of the damping valve core is provided with a small damping hole, and the bottom of the spring mounting hole is radially provided with 4 oil inlet holes; the damping valve core is arranged in a first shaft hole of the plunger, the damping valve core can move left and right, the first shaft hole plays a role in guiding, and the bottom of the first shaft hole plays a role in limiting;
an oil outlet valve seat is installed in the second shaft hole, two pin holes which are symmetrically arranged are axially formed in the second shaft hole, and the oil outlet valve seat is fixed in the second shaft hole of the plunger through two pins;
one end of a spring arranged in a hole on the left side of the damping valve core is contacted with the bottom of the first shaft hole, the other end of the spring is contacted with the bottom of a spring hole of the damping valve core, and the damping valve core is pressed towards the right side by the spring force to the end face of the oil outlet valve seat;
the tail part of the oil outlet valve mounting hole is connected with the plunger distribution groove through an inclined oil duct;
the plunger is provided with a plunger pressure relief groove and an oil inlet groove, wherein the plunger pressure relief groove is connected with the oil inlet groove through an oil drainage channel;
and the oil quantity control sleeve is sleeved at one end of the plunger, which is far away from the high-pressure oil cavity, and is used for opening or closing the plunger pressure relief groove when the plunger reciprocates to realize the control of the oil supply quantity.
2. The plunger of a dispensing pump equipped with a fuel outlet valve as recited in claim 1, wherein said fuel drainage passage comprises two fuel drainage passage units, respectively a first fuel drainage passage unit disposed radially along said plunger and a second fuel drainage passage unit connected between said first fuel drainage passage unit and the bottom of said plunger fuel inlet groove.
3. The dispensing pump plunger with delivery valve of claim 1 wherein a conical seal is provided between the dispensing housing and the delivery valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603210.4U CN212202313U (en) | 2019-09-25 | 2019-09-25 | Distribution pump plunger with oil outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603210.4U CN212202313U (en) | 2019-09-25 | 2019-09-25 | Distribution pump plunger with oil outlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212202313U true CN212202313U (en) | 2020-12-22 |
Family
ID=73807364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921603210.4U Active CN212202313U (en) | 2019-09-25 | 2019-09-25 | Distribution pump plunger with oil outlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212202313U (en) |
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2019
- 2019-09-25 CN CN201921603210.4U patent/CN212202313U/en active Active
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