CN210106047U - Opening and closing control valve core of high-pressure common rail oil sprayer - Google Patents
Opening and closing control valve core of high-pressure common rail oil sprayer Download PDFInfo
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- CN210106047U CN210106047U CN201920306334.XU CN201920306334U CN210106047U CN 210106047 U CN210106047 U CN 210106047U CN 201920306334 U CN201920306334 U CN 201920306334U CN 210106047 U CN210106047 U CN 210106047U
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Abstract
A start-stop control valve core of a high-pressure common rail oil sprayer comprises a closed oil inlet hole, a closed oil outlet hole, a lower transverse oil inlet groove, an injection oil inlet hole and an injection oil hole, wherein the closed oil inlet hole is communicated with the closed oil outlet hole through the lower transverse oil inlet groove; the closed oil inlet hole and the injection oil inlet hole are communicated with an axial oil inlet groove arranged on the outer circular side wall of the oil inlet guide valve sleeve; the valve needle can be opened and closed in response to a short time, oil injection and oil cut-off are more thorough, the power density of the oil injector is improved, the power output of a diesel engine can be further improved, the emission of the diesel engine is reduced, and the valve needle is a key part of an energy-saving and environment-friendly diesel engine.
Description
The technical field is as follows:
the patent of the utility model relates to a common rail formula sprayer for the diesel engine especially relates to high pressure common rail formula sprayer.
Background art:
the structure of the prior art oil injector assembly is shown in figure 1 and figure 2, and comprises a valve body 1, an oil injection matching part 2, a locking cap 3, a valve rod 4, a sealing ball 5, a solenoid valve part 7, an electromagnetic valve part 7, an armature seat 72, an armature rod 73 and a spring 74, wherein the oil injection matching part 2 consists of a needle valve 21 and a needle valve body 22, the valve body 1 is provided with a central hole 11, a high-pressure oil inlet hole 12, an upper outer oil duct 13 and a lower outer oil duct 14, the valve rod 4 is arranged in the central hole of the valve body 1 in a clearance fit manner, the lower guide section of the valve rod 4 is pressed on the needle valve 21 through an oil nozzle spring and a lower guide sleeve, the needle valve 21 is sleeved in the central hole of the needle valve body 22, the oil injection matching part 2 is axially fixed at the lower end of the valve body 1 by the locking cap 3, the oil saving body 6 is sleeved at the upper end of, the solenoid 71 controls the extension and retraction of the armature rod 73, and the working principle is as follows:
the high pressure fuel oil enters the upper outer oil duct 13 and the lower outer oil duct 14 of the valve body 1 through the high pressure oil inlet 12, the high pressure fuel oil enters the upper control chamber 8 formed between the utility model 6 and the top end of the valve rod 4 from the side oil inlet hole 61 on the utility model 6 on one way, the high pressure fuel oil passes through the lower outer oil duct 14 and the lower control chamber 9 in the oil injection matching part 2 on the other way, when the electromagnetic coil 71 is de-energized, the sealing ball 5 is sealed on the conical seat surface of the utility model 6 due to the action of the pre-tightening force of the spring 74, under the condition of not considering the throttling loss, the oil pressure intensity in the upper control chamber 8 and the lower control chamber 9 is the same, because the diameter of the valve rod 4 is larger than that of the needle valve 21, therefore, the downward hydraulic pressure force F1 applied to the needle valve 21 by the valve rod 4 by the upper control chamber 8 is larger than the upward hydraulic pressure F2 applied to, f1 is greater than F2, the needle valve 21 is sealed on the conical seat surface of the needle valve body 22, the oil injection matching part 2 is in a closed state, and oil is not injected;
when the electromagnetic coil 71 is electrified, the electromagnetic coil 71 generates electromagnetic suction force on the armature rod 73, when the electromagnetic force overcomes the pretightening force of the spring 74, the armature rod 73 is driven to move upwards, the sealing ball 5 leaves the conical seat surface of the utility model 6, the upper control cavity 8 is communicated with the low-pressure cavity through the end face oil outlet 62, the flow speed of the end face oil outlet 62 is larger than that of the side face oil inlet 61, so that the pressure of the upper control cavity 8 is gradually reduced, F1 is reduced, when the resultant force applied to the needle valve 21 is upward, the needle valve 21 is forced to move upwards, the oil injection matching part 2 is in an open state, and the oil injector realizes the injection of pressure oil;
the existing high-pressure common rail oil injector cannot simultaneously reduce the opening time and the closing time. The existing high-pressure common rail oil injector has low power density and can not meet the matching requirements of a high-efficiency energy-saving diesel engine, so the existing high-pressure common rail oil injector needs to be improved and designed. The applicant utility model discloses a high pressure common rail injector, wherein, it is the key part to open and close the control valve, and opens and close the control case and be the most key part.
The utility model has the following contents:
the utility model aims at providing a high pressure common rail fuel injector's open and close control case, it can reduce the delay time of opening and closing of common rail fuel injector injection in-process simultaneously to reduce the injection duration of sprayer, improve the power density of sprayer.
The utility model adopts the technical proposal that:
the utility model provides a high pressure common rail injector's opening and close control case, characterized by: the oil inlet hole is closed, the oil outlet hole is closed, the lower transverse oil inlet groove, the injection oil inlet hole and the injection oil outlet hole are formed, wherein the oil inlet hole is closed and the oil outlet hole is closed and communicated through the lower transverse oil inlet groove, the injection oil inlet hole and the injection oil outlet hole are communicated through the upper transverse oil inlet groove, the minimum aperture of the oil outlet hole and the injection oil outlet hole is closed and is smaller than the aperture of the vertical oil outlet hole, and the oil inlet hole is closed and is communicated with the axial oil inlet groove formed in the outer circle side wall of the oil inlet guide valve sleeve.
Further, the oil inlet ring is arranged on the lower end face of the valve core, and the closed oil inlet hole and the injection oil inlet hole are communicated with the oil inlet ring.
Further, the closing oil inlet hole and the injection oil inlet hole are located on the same circumference.
Further, the closing oil inlet hole and the injection oil inlet hole are stepped holes, the lower part is large and the upper part is small, and the closing oil outlet hole and the injection oil outlet hole are also stepped holes, the upper part is large and the lower part is small.
Because the utility model abandons the control principle of the existing oil sprayer opening and closing control valve, the integral opening and closing control valve is designed into a split combined structure, which comprises a valve seat, a valve core and an oil inlet guide valve sleeve, the valve seat, the valve core and the oil inlet guide valve sleeve are coaxially distributed from top to bottom in sequence, a conical seat surface hole and a vertical oil outlet hole are arranged on the upper end surface of the valve seat, the vertical oil outlet hole is arranged at the center of the conical seat surface hole, an upper transverse oil inlet groove is arranged on the lower end surface, and the vertical oil outlet hole is communicated with the upper transverse oil inlet groove; the valve core is provided with a closing oil inlet hole, a closing oil outlet hole, a lower transverse oil inlet groove, an injection oil inlet hole and an injection oil outlet hole, wherein the closing oil inlet hole is communicated with the closing oil outlet hole through the lower transverse oil inlet groove, the injection oil inlet hole is communicated with the injection oil outlet hole through the upper transverse oil inlet groove, and the minimum aperture of the closing oil outlet hole and the injection oil outlet hole is smaller than that of the vertical oil outlet hole; an axial oil inlet groove is arranged on the outer circle side wall of the oil inlet guide valve sleeve and is communicated with the closed oil inlet hole and the injection oil inlet hole through an oil inlet ring;
because the flow of the vertical oil hole is larger than that of the injection oil inlet hole, the pressure intensity of the upper control cavity can be rapidly reduced, and therefore the hydraulic pressure transmitted to the needle valve by the oil pressure in the upper control cavity through the valve rod can be rapidly reduced, and the opening delay can be reduced; when the electromagnetic valve is not electrified, the sealing ball is sealed on the seat surface of the valve seat, at the moment, one path of high-pressure oil enters the upper control cavity through the closed oil inlet hole, the lower transverse oil inlet groove and the closed oil outlet hole, the other path of high-pressure oil enters the upper control cavity through the injected oil inlet hole, the upper transverse oil inlet groove and the injected oil hole, the two paths of high-pressure oil simultaneously enter the upper control cavity, the pressure in the upper control cavity rises rapidly, and therefore the hydraulic pressure transmitted to the needle valve by the upper control cavity through the valve rod can rise rapidly, and therefore closing delay can be reduced. From this, through this utility model realization to reducing simultaneously in the injection process and opening delay and close the delay, realize reducing and spray the duration, realize improving power density's purpose. The structure ensures that the response time of opening and closing of the needle valve is shorter, oil injection and oil cut-off are thorough, the power density of the oil injector is improved, the power output of the diesel engine can be further improved, the emission of the diesel engine is reduced, and the weight of the unit power of the diesel engine is reduced, so that the structure is a key part of the energy-saving and environment-friendly diesel engine.
Description of the drawings:
FIG. 1 is a schematic diagram of a prior art fuel injector;
FIG. 2 is a schematic structural view of the fuel saving body of FIG. 1;
FIG. 3 is a schematic structural view of a fuel injector using the present invention;
fig. 4 is a schematic view of the installation structure of the present invention in the valve body;
FIG. 5 is a schematic view of a valve seat;
FIG. 6 is a schematic structural view of the valve cartridge;
FIG. 7 is a schematic structural diagram of an oil inlet guide valve sleeve;
FIG. 8 is a schematic structural view of a valve body;
FIG. 9 is a schematic view of the valve stem assembly;
in the figure: 1-a valve body; 2-oil injection matching parts; 3-locking cap; 4-a valve stem; 5-sealing ball; 6-the utility model; 7-an electromagnetic valve component; 8-an upper control chamber; 9-lower control chamber; 11-a central hole; 12-high pressure oil inlet hole; 13-upper outer oil duct; 14-lower outer oil gallery; 15-a transverse oil inlet groove; 111-upper section of pore system; 112-spool bore; 113-guide hole on valve stem; 114-valve stem lower pilot hole; 21-needle valve; 22-needle valve body; 23-needle valve oil inlet; 41-upper guide section; 42-upper return spring; 43-circlip for shaft; 44-a transition section; 45-lower return spring; 46-a lower guide section; 47-lower guide sleeve; 61-side oil inlet hole; 62-end face oil outlet; 63-valve seat; 64-a valve core; 65-an oil inlet guide valve sleeve; 631-conical seat face holes; 632-vertical oil outlet holes; 633-upper transverse oil inlet tank; 641-closing the oil inlet hole; 642-closing the oil outlet; 643-lower transverse oil intake; 644-jet oil inlet; 645-jet oil outlet; 646-an oil inlet ring; 651-axial oil intake groove; 71-magnetic coil, 72-armature seat, 73-armature rod; 74-spring.
The specific implementation mode is as follows:
the embodiment of the present invention in the high power density high pressure common rail injector is described below with reference to the accompanying drawings:
example 1:
a high-pressure common rail injector with high power density, as shown in fig. 3-9, comprises a valve body 1, an oil injection matching part 2, a locking cap 3, a valve rod 4, a sealing ball 5, and a solenoid valve part 7, the utility model discloses 6 comprises a valve seat 63, a valve core 64 and an oil inlet guide valve sleeve 65, the valve seat 63, the valve core 64 and the oil inlet guide valve sleeve 65 are coaxially distributed from top to bottom in sequence, a conical seat face hole 631 and a vertical oil outlet 632 are arranged on the upper end face of the valve seat 63, the vertical oil outlet 632 is arranged at the center of the conical seat face hole 631, an upper horizontal oil inlet groove 633 is arranged on the lower end face, and the vertical oil outlet 632 is communicated with the upper horizontal oil inlet groove 633; a closing oil inlet 641, a closing oil outlet 642, a lower transverse oil inlet groove 643, an injection oil inlet 644 and an injection oil hole 645 are arranged on the valve core 64, wherein the closing oil inlet 641 is communicated with the closing oil outlet 642 through the lower transverse oil inlet groove 643, the injection oil inlet 644 is communicated with the injection oil outlet 645 through the upper transverse oil inlet groove 633, and the minimum aperture of the closing oil outlet 642 and the injection oil hole 645 is smaller than the aperture of the vertical oil outlet 632; the closed oil inlet 641 and the injection oil inlet 644 are positioned on the same circumference, an oil inlet ring 646 is arranged on the lower end surface of the valve core 64, the closed oil inlet 641 and the injection oil inlet 644 are communicated with the oil inlet ring 646, the closed oil inlet 641 and the injection oil inlet 644 are stepped holes with the large lower part and the small upper part, and the closed oil outlet 642 and the injection oil hole 645 are also stepped holes with the large upper part and the small lower part; an axial oil inlet groove 651 is arranged on the outer circle side wall of the oil inlet guide valve sleeve 65, and the axial oil inlet groove 651 is communicated with the closed oil inlet hole 641 and the injection oil inlet hole 644 through an oil inlet ring; the valve body 1 is provided with a central hole 11, a high-pressure oil inlet hole 12 and a transverse oil inlet groove 15, the high-pressure oil inlet hole 12 is communicated with the central hole 11, the central hole 11 is a step-type hole system and comprises an upper section hole system 111, a valve core hole 112, a valve rod upper guide hole 113 and a valve rod lower guide hole 114, the upper section hole system 111 is a mounting hole of the electromagnetic valve component 7, the transverse oil inlet groove 15 is arranged on the lower end surface of the valve body 1 and is communicated with the valve rod lower guide hole 114, a valve core 64 and a valve seat 63 are sequentially arranged in the valve core hole 112, the valve core 64 is positioned below the valve seat 63, the valve rod 4 sequentially comprises an upper guide section 41, an upper return spring 42, a shaft snap spring 43, a transition section 44, a lower return spring 45, a lower guide section 46 and a lower guide sleeve 47 from top to bottom, the upper return spring 42 is sleeved on the upper guide section 41 of the valve rod 4 and is axially limited by the shaft snap spring 43, an, the two are in precise clearance fit, the oil inlet guide valve sleeve 65 is fixedly arranged in a guide hole 113 on the valve rod, the upper end surface of the oil inlet guide valve sleeve 65 is in sealed butt joint with the lower end surface of the valve core 64, the lower return spring 45 is sleeved on the lower guide section 46, the lower guide section 46 is sleeved in a lower guide hole 114 of the valve rod, the lower end surface of the lower guide section 46 is in contact with the upper end surface of the needle valve 21, the needle valve 21 is sleeved in a central hole of the needle valve body 22, the oil injection matching part 2 is axially fixed at the lower end of the valve body 1 by the locking cap 3, the upper end of a needle valve oil inlet hole 23 on the needle valve body 22 is communicated with the transverse oil inlet groove 15, and the lower end.
The specific working principle is as follows: high-pressure fuel enters from a high-pressure oil inlet hole 12 obliquely arranged on the valve body 1 and then directly enters into a valve rod upper guide hole 113 and a valve rod lower guide hole 114, and the high-pressure fuel in the valve rod upper guide hole 113 enters into the upper control cavity 8 from an axial oil inlet groove 651 arranged on the outer circular side wall of the oil inlet guide valve sleeve 65 through a closed oil inlet hole 641 and an injection oil inlet hole 644; high-pressure oil in the valve rod lower guide hole 114 enters the lower control cavity 9 from the transverse oil inlet groove 15 and the needle valve oil inlet hole 23; when the electromagnetic valve component 7 is not electrified, due to the pretightening force of the electromagnet spring, the sealing ball 5 is sealed on the vertical oil outlet hole 632 in the conical seat surface hole 631 of the valve seat 63 by the armature rod through the ball seat, the vertical oil outlet hole 632 is blocked by the sealing ball 5, high-pressure oil enters the upper control cavity 8 through the closing oil inlet hole 641, the lower transverse oil inlet groove 643 and the closing oil outlet hole 642 on one path, and enters the upper control cavity 8 through the injection oil inlet hole 644, the upper transverse oil inlet groove 633 and the injection oil hole 645 on the other path, and because the diameter of the upper guide section 41 of the upper valve rod is larger than that of the lower guide section 46, the resultant force applied to the valve rod 4 is downward, so that the oil injection matching part 2 is in a closed state, and the oil;
when the electromagnetic valve part 7 is powered on, the armature rod overcomes the pretightening force of the spring to move upwards, the sealing ball 5 is in a decompression state, at the moment, high-pressure oil in the upper control cavity 8 is decompressed from the ejection oil hole 645, the upper transverse oil inlet groove 633, the vertical oil outlet hole 632 and the conical seat surface hole 631, and as the pressure in the lower control cavity 9 is higher than the pressure in the upper control cavity 8, the needle valve 21 drives the valve rod 4 to move upwards, so that the oil injection matching part 2 is in an oil injection state, and the oil injector injects oil.
The utility model discloses an embodiment is many, does not list one by one here, as long as take the utility model discloses a scheme of waiting function to replace all belongs to the utility model discloses a protection scope.
Claims (4)
1. The utility model provides a high pressure common rail injector's opening and close control case, characterized by: the oil inlet guide valve comprises a closed oil inlet hole (641), a closed oil outlet hole (642), a lower transverse oil inlet groove (643), an injection oil inlet hole (644) and an injection oil hole (645), wherein the closed oil inlet hole (641) is communicated with the closed oil outlet hole (642) through the lower transverse oil inlet groove (643), the injection oil inlet hole (644) is communicated with the injection oil hole (645) through an upper transverse oil inlet groove (633), the minimum aperture of the closed oil outlet hole (642) and the injection oil hole (645) is smaller than that of a vertical oil outlet hole (632), and the closed oil inlet hole (641) and the injection oil inlet hole (644) are communicated with an axial oil inlet groove (651) formed in the outer circle side wall of an oil inlet guide valve sleeve (65).
2. The opening and closing control valve core of the high-pressure common rail injector according to claim 1, characterized in that: the oil inlet valve also comprises an oil inlet ring (646), wherein the oil inlet ring (646) is arranged on the lower end surface of the valve core (64), and the closed oil inlet hole (641) and the injection oil inlet hole (644) are communicated with the oil inlet ring (646).
3. The opening and closing control valve core of the high-pressure common rail injector according to claim 1, characterized in that: the closing oil inlet hole (641) and the injection oil inlet hole (644) are located on the same circumference.
4. The opening and closing control valve core of the high-pressure common rail injector according to claim 1, characterized in that: the closing oil inlet hole (641) and the injection oil inlet hole (644) are stepped holes with the large lower part and the small upper part, and the closing oil outlet hole (642) and the injection oil outlet hole (645) are also stepped holes with the large upper part and the small lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920306334.XU CN210106047U (en) | 2019-03-11 | 2019-03-11 | Opening and closing control valve core of high-pressure common rail oil sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920306334.XU CN210106047U (en) | 2019-03-11 | 2019-03-11 | Opening and closing control valve core of high-pressure common rail oil sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210106047U true CN210106047U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920306334.XU Active CN210106047U (en) | 2019-03-11 | 2019-03-11 | Opening and closing control valve core of high-pressure common rail oil sprayer |
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| Country | Link |
|---|---|
| CN (1) | CN210106047U (en) |
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2019
- 2019-03-11 CN CN201920306334.XU patent/CN210106047U/en active Active
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