CN111237538A - Large-flow intelligent control electromagnetic valve of engine piston cooling system - Google Patents
Large-flow intelligent control electromagnetic valve of engine piston cooling system Download PDFInfo
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- CN111237538A CN111237538A CN202010157341.5A CN202010157341A CN111237538A CN 111237538 A CN111237538 A CN 111237538A CN 202010157341 A CN202010157341 A CN 202010157341A CN 111237538 A CN111237538 A CN 111237538A
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- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims abstract description 40
- 230000005389 magnetism Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 13
- 238000002955 isolation Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 67
- 239000010705 motor oil Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/04—Devices for relieving the pressure on the sealing faces for sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
Abstract
The invention discloses a large-flow intelligent control electromagnetic valve of an engine piston cooling system, which comprises: the electromagnetic valve comprises an electromagnet device, a valve device and a push rod for transmitting the electromagnetic force of the electromagnet device to the valve device; the electromagnet device comprises an electromagnetic coil, a shell, a magnetism isolating sleeve, a movable armature, an upper magnetic yoke and a lower magnetic yoke; the valve device comprises a valve body, a valve core and a return spring, the valve body and the lower magnetic yoke are integrally arranged, and the ejector rod abuts against between the movable armature and the valve core; the valve core is provided with a pressure balance hole which is communicated with the inner cavities of the valve body at the two ends of the valve core, and a peripheral pressure relief oil duct which is used for communicating the inner cavity of the valve body above the valve core with a low-pressure area at the oil outlet is arranged between the valve body and the valve core. Under the working condition of large flow, the engine oil pressure in the lower cavity or the upper cavity of the valve core forms a pressure gradient with high middle and low periphery, the pressure imbalance influence of the engine oil pressure gradient on the valve core is eliminated, and the regulation and control precision of the cooling oil quantity of the piston is improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic valves, in particular to a large-flow intelligent control electromagnetic valve for an engine piston cooling system.
Background
With the application of technologies such as turbocharging and high compression ratio, the combustion temperature of an engine is higher and higher, the environment temperature of a piston is also higher and higher, the detonation phenomenon is easy to occur, and the lubrication, the service life and the smoothness of the engine are adversely affected. The engine piston cooling system can cool the engine piston, so that the piston abrasion can be effectively reduced, the service life of the piston can be prolonged, and the stable operation of the engine can be ensured. The control components of the known piston cooling system are mostly mechanical switch valves or electromagnetic switch valves, the switch valves can only control the opening and closing of an oil channel of the piston engine, the flow can not be accurately adjusted according to the working condition of the engine, the piston of the engine is easily cooled excessively in a cold state, the problems that the proper temperature for combustion of mixed gas is formed in a combustion chamber, the exhaust emission is deteriorated and the like are not facilitated, and the crude piston cooling control mode can not meet the requirements along with the national improvement of the emission requirements of the engine.
The Chinese invention patent CN109237108A discloses an electromagnetic control valve for an engine piston cooling system, which comprises a valve sleeve structure and an electromagnetic coil structure, wherein the electromagnetic coil structure is arranged above the valve sleeve structure, the valve sleeve of the valve sleeve structure is a columnar hollow structure and is provided with a front-end oil inlet, an oil outlet is arranged on the peripheral side of the valve sleeve, a spring, a valve core and a thimble are arranged in the valve sleeve, and the valve core can axially reciprocate in the valve sleeve; the inner side of the shell of the electromagnetic coil structure is provided with a coil, the inner side of the coil is provided with an inner cover, the inner side of the inner cover is provided with a plunger, and the plunger is fixed at the top of the thimble. The electromagnetic control valve sends out an instruction through the ECU according to the working condition of the engine, and the flow of the engine oil flowing to the cooling nozzle is accurately controlled, so that the problem that the engine piston is excessively cooled in a cold state is solved.
In practical applications, the above-mentioned solenoid control valve has the following drawbacks:
1) the valve core is influenced by the oil pressure of the engine oil besides the electromagnetic force and the spring elasticity, and under the action of the same electromagnetic force, different oil pressures can lead to different strokes of the valve core, so that the flow of the engine oil is different, and the regulation and control precision of the temperature of the piston can be reduced.
2) The plunger is fixed at the top of the ejector pin, when the plunger moves axially in the inner cover, the ejector pin moves axially in the central through hole of the electromagnet shell, and the plunger and the ejector pin are fixedly connected, so that the requirement on the coaxiality of the plunger and the ejector pin is high, otherwise, the eccentric wear of the ejector pin on the central through hole of the electromagnet shell can be caused, and the clamping stagnation of the ejector pin can be possibly caused.
Chinese utility model patent CN202020247187.6 discloses an engine piston cooling system intelligent control solenoid valve, for solving above-mentioned first defect, pressure balance hole has been seted up on the case to this solenoid valve, pressure balance hole can be with the valve body inner chamber intercommunication at both ends about the case, therefore under the not too big condition of engine oil flow, the oil pressure that acts on both ends can keep balance basically about the case, the case motion can not receive the influence of engine oil pressure, just can the position of accurate control case through control electromagnetic force and setting up the spring force, thereby can accurate control engine oil flow, improve the regulation and control precision of piston temperature. The second disadvantage is solved by the method of separately arranging the plunger and the thimble.
However, at a large flow rate (generally more than 30L/min), for example, in an Weichai diesel P6 engine (which is a medium power engine), the flow rate of the piston cooling oil can generally reach 70L/min, and the pressure can reach 0.6Mpa, in this case, as shown in FIG. 8, when the oil flows in from the lower oil inlet 301 and flows out from the oil outlet 302 arranged at the side peripheral portion, a certain impact force is generated, which is unevenly distributed in the oil chamber of the spool, so that the oil pressure P2 of the chamber below the spool is changed in a gradient manner (the middle pressure is high, the ambient pressure is low), and under the influence of the pressure gradient, the oil pressure acting on the upper and lower ends of the spool 31 cannot be balanced by only providing the oil pressure balancing hole 311 at the top end of the spool 31, particularly when the valve is about to be closed, the flow area at the valve oil outlet 302 is reduced, the flow rate is increased, and the principle of the, the pressure at the oil outlet 302 is reduced, the force applied below the valve core 31 is reduced sharply, the engine oil in the cavity of the valve body above the valve core 31 is relatively static, and the engine oil pressure P1 in the cavity above the valve core does not form a pressure gradient, so that the problem of unbalanced pressure of the middle pressure and the surrounding pressure is further aggravated, the valve core is subjected to unbalanced hydraulic pressure which is beneficial to closing the valve core in the closing process, the phenomenon of active closing of the valve core which is not controlled by people easily occurs, meanwhile, the phenomenon that the valve core cannot be opened easily occurs in the opening process of the valve, and finally, the cooling oil amount of the piston cannot be controlled accurately.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the large-flow intelligent control electromagnetic valve suitable for the engine piston cooling system, so as to eliminate the pressure imbalance influence on the valve core caused by the engine oil pressure gradient and improve the regulation and control precision of the piston cooling oil quantity.
In order to solve the technical problems, the invention adopts the technical scheme that:
a large-traffic intelligent control solenoid valve of engine piston cooling system includes: the electromagnetic valve comprises an electromagnet device, a valve device and a push rod for transmitting electromagnetic force generated by the electromagnet device to the valve device; the electromagnet device comprises an electromagnetic coil, a shell is arranged on the outer side of the electromagnetic coil, a magnetism isolating sleeve is arranged on the inner side of the electromagnetic coil, an upper magnetic yoke is arranged at the upper end of the electromagnetic coil, a lower magnetic yoke is arranged at the lower end of the electromagnetic coil, a movable armature is arranged in the magnetism isolating sleeve, and the movable armature is in sliding fit with the magnetism isolating sleeve; the valve device comprises a valve body, the valve body and the lower magnetic yoke are integrally arranged, the lower magnetic yoke part of the valve body is provided with an inner connecting part and an outer connecting part, the outer connecting part is fixedly connected with the shell, and the inner connecting part extends into the magnetic isolation sleeve and is in sealing connection with the magnetic isolation sleeve; the valve body is provided with a valve body inner cavity, the lower end part of the valve body is provided with an oil inlet, the side peripheral wall of the valve body is provided with an oil outlet, the oil inlet and the oil outlet are respectively communicated with the valve body inner cavity, a valve core and a reset spring are arranged in the valve body inner cavity, the valve core is in sliding fit with a guide hole in the valve body inner cavity, a lower magnetic yoke part of the valve body is provided with a central through hole, and the central through hole is communicated with the valve body inner cavity; the ejector rod extends into the inner cavity of the valve body from the central through hole of the valve body and abuts against the position between the movable armature and the valve core; the center of the valve core is provided with a pressure balance hole which is communicated with the inner cavities of the valve body at the upper end and the lower end of the valve core; and a peripheral pressure relief oil duct is arranged between the valve core and the valve body and communicates the inner cavity of the valve body above the valve core with a low-pressure area at the oil outlet.
The peripheral pressure relief oil duct comprises an annular pressure relief groove formed in the peripheral surface of the valve core, a valve core pressure relief hole formed in the valve core and a valve body pressure relief hole formed in the valve body, the valve core pressure relief hole is communicated with the annular pressure relief groove, and the annular pressure relief groove is selectively communicated with or sealed by the valve body pressure relief hole in the opening or closing process of the valve.
The peripheral pressure relief oil passage comprises a plurality of longitudinal pressure relief grooves formed in the peripheral surface of the valve core.
Wherein, the longitudinal pressure relief grooves are circumferentially and uniformly distributed.
The peripheral pressure relief oil passage is an annular overflowing gap between the peripheral surface of the valve core and an inner cavity guide hole of the valve body, and the flow of the annular overflowing gap is not less than that of the pressure balance hole.
The outer peripheral surface of the valve core is provided with a plurality of oil storage grooves which are circumferentially arranged.
Wherein the pressure balance hole comprises an axial hole and a radial hole which are communicated with each other.
After the technical scheme is adopted, the invention has the beneficial effects that:
1) under the working condition of large flow, because the valve core is provided with a pressure balance hole which is communicated with the inner cavities of the valve body at the two ends of the valve core, and the valve core and the valve body are provided with peripheral pressure relief oil ducts or the valve core is provided with peripheral pressure relief oil ducts which communicate the inner cavity of the valve body above the valve core with the low-pressure area at the oil outlet, the oil pressure of the cavity below the valve core forms a pressure gradient which is high in the middle and low in the periphery, the oil pressure of the cavity above the valve core also forms a pressure gradient which is high in the middle and low in the periphery, so that the oil pressure at the upper end and the lower end of the valve core can be basically kept balanced, the pressure imbalance influence of the oil pressure gradient on the valve core is eliminated, the position of the valve core can be accurately controlled by controlling the electromagnetic force and setting the spring force, and the regulation and control precision, the phenomenon that the valve core is actively closed without being controlled by human in the valve closing process is avoided, and the phenomenon that the valve core cannot be opened in the valve opening process is also avoided. When the engine is just started to warm up, the piston does not need to be cooled, the electromagnetic valve keeps a closed state, and engine oil does not cool the piston; when the engine is in an idling state or a small working condition state, the electromagnetic valve can be opened and kept at a certain small flow rate to provide cooling engine oil with a proper flow rate for the piston; when the engine runs at high load, the electromagnetic valve is fully opened, and the cooling engine oil with the maximum flow is provided for the piston.
2) Because the valve body and the lower magnetic yoke are integrally arranged, on one hand, a central through hole for the ejector rod to pass through can be longer, so that the guiding property is better; on the other hand, the engine oil which flows out of the inner cavity of the valve body through the central through hole can be sealed only by one sealing ring, so that the space is greatly saved, and the assembly process times are reduced.
Drawings
FIG. 1 is a schematic view of the installation structure of a large-flow intelligent control electromagnetic valve embodiment 1 of an engine piston cooling system of the invention;
FIG. 2 is a schematic structural view of the embodiment 1 shown in FIG. 1 in an open state;
FIG. 3 is a schematic structural view of the embodiment 1 in FIG. 1 in a closing process;
FIG. 4 is a schematic structural diagram of the embodiment 1 in FIG. 1 at the closing moment;
FIG. 5 is a schematic structural view of the embodiment 1 shown in FIG. 1 in a completely closed state;
FIG. 6 is a structural sectional view of a large-flow intelligent control electromagnetic valve embodiment 2 of the engine piston cooling system of the invention;
FIG. 7 is a schematic structural view of the valve cartridge of embodiment 2 shown in FIG. 6;
FIG. 8 is a mechanical analysis schematic diagram of an electromagnetic cooling valve provided with only a pressure balancing hole structure;
in the figure, 10-shell, 11-electromagnetic coil, 12-movable armature, 13-magnetic isolation sleeve, 14-upper magnetic yoke, 15-first sealing ring, 16-second sealing ring, 17-third sealing ring, 20-ejector rod, 30-valve body, 31-valve core, 32-reset spring, 301-oil inlet, 302-oil outlet, 303-valve body pressure relief hole, 311-pressure balance hole, 312-annular pressure relief groove, 313-valve core pressure relief hole, 314-longitudinal pressure relief groove, 315-oil storage groove, 40-engine oil channel, B1-surrounding pressure relief oil channel, B2-surrounding pressure relief oil channel, C-magnetic circuit, P1-valve core upper cavity engine oil pressure, and P2-valve core lower cavity engine oil pressure.
Detailed Description
The invention is further illustrated with reference to the following figures and examples. The upper and lower directions in the present invention refer to the orientation of the solenoid valve in the use state, which is for convenience of description and understanding, and should not be construed as limiting the corresponding technical features of the present invention.
Example 1
As shown in fig. 1, the high-flow intelligent control electromagnetic valve for the engine piston cooling system is installed in an engine oil passage 40, and cools an engine piston by using engine oil of an engine. The solenoid valve includes an electromagnet device, a valve device, and a push rod 20 for transmitting electromagnetic force generated by the electromagnet device to the valve device.
The electromagnet device comprises an electromagnetic coil 11, a shell 10 is arranged on the outer side of the electromagnetic coil 11, a magnetism isolating sleeve 13 is arranged on the inner side of the electromagnetic coil 11, and the magnetism isolating sleeve 13 is made of stainless steel. An upper magnetic yoke 14 is arranged at the upper end of the electromagnetic coil 11, the upper magnetic yoke 14 is a plate-shaped magnetic conduction plate and is arranged between the shell 10 and the end part of the electromagnetic coil 11, and a third sealing ring 17 is arranged between the shell 10 and the upper magnetic yoke 14 and is used for preventing outside dirt from entering. The lower end of the electromagnetic coil 11 is provided with a lower magnetic yoke (the lower magnetic yoke is integrated with the valve body 30, and the specific structure will be described in detail below), the magnetic isolation sleeve 13 is provided with a movable armature 12, and the movable armature 12 is in sliding fit with the magnetic isolation sleeve 13. The magnetic isolation sleeve 13 can be used as a guide structure for the sliding of the movable armature 12 and can play a role in magnetic isolation, so that magnetic lines of force can only pass through a magnetic circuit C comprising the electromagnetic coil 11, the movable armature 12, the upper magnetic yoke 14 and the lower magnetic yoke, and the leakage of the magnetic lines of force is reduced.
The valve device comprises a valve body 30, the valve body 30 and the lower magnetic yoke are integrally arranged, the lower magnetic yoke part of the valve body 30 is provided with an inner connecting part and an outer connecting part, the outer peripheral surface of the outer connecting part extends into the inner peripheral surface of the shell 10 and is in interference connection, and the connecting mode is simple and firm and is not easy to disengage. The inner connecting part extends into the magnetic isolation sleeve 13 and is connected with the magnetic isolation sleeve in a sealing mode through a first sealing ring 15. A second seal ring 16 for preventing contaminants from entering is provided between the external connection portion and the electromagnetic coil 11. Because the valve body 30 and the lower magnetic yoke are integrally arranged, on one hand, the central through hole for the ejector rod 20 to pass through can be longer (compared with the central through hole in the Chinese patent CN 109237108A), so that the guiding property is better; on the other hand, only the first sealing ring 15 is needed to seal the engine oil flowing out from the central through hole in the inner cavity of the valve body, and compared with the Chinese patent CN109237108A (the static armature needs to be sealed with the electromagnetic coil, and the valve sleeve needs to be sealed with the electromagnetic coil), the sealing is enough for one time, so that the space is greatly saved, and the assembly process times are also reduced.
The valve body 30 is provided with a valve body inner cavity, the lower end part of the valve body 30 is provided with an oil inlet 301, the side peripheral wall of the valve body 30 is provided with an oil outlet 302, the oil inlet 301 and the oil outlet 302 are respectively communicated with the valve body inner cavity, the valve core 31 and a reset spring 32 are arranged in the valve body inner cavity, the valve core 31 is in sliding fit with a guide hole in the valve body inner cavity, the lower magnetic yoke part of the valve body 30 is provided with a central through hole, and the central through hole is. The ejector rod 20 extends into the inner cavity of the valve body from the central through hole of the valve body 30 and abuts against between the movable armature 12 and the valve core 31, the ejector rod 20 is not fixedly connected with the movable armature 12, and the coaxiality between the movable armature 12 and the ejector rod is not required, so that the manufacturing cost is reduced.
The center of the valve core 31 is provided with a pressure balance hole 311, the pressure balance hole 311 is communicated with the valve body inner cavities at the upper end and the lower end of the valve core 31, and the pressure balance hole 311 comprises an axial hole and a radial hole which are communicated with each other. A peripheral relief oil passage B1 is provided on the valve element 31 and the valve body 30, and a peripheral relief oil passage B1 connects the valve body cavity above the valve element 31 with the low pressure region at the oil outlet 302. The peripheral pressure relief oil passage B1 includes an annular pressure relief groove 312 formed in the circumferential surface of the valve element 31, a valve element pressure relief hole 313 formed in the valve element 31, and a valve body pressure relief hole 303 formed in the valve body 30, the valve element pressure relief hole 313 communicates with the annular pressure relief groove 312, and the annular pressure relief groove 312 selectively communicates with or is closed by the valve body pressure relief hole 303 during the opening or closing process of the valve.
Under the working condition of large flow, because the valve core 31 is provided with the pressure balance hole 311, the pressure balance hole 311 is communicated with the valve body inner cavities at two ends of the valve core 31, the valve core 31 and the valve body 30 are provided with the peripheral pressure relief oil duct B1, the peripheral pressure relief oil duct B1 is communicated with the valve body inner cavity positioned above the valve core 31 and the low-pressure area at the oil outlet 302, so that the oil pressure P2 of the cavity below the valve core forms a pressure gradient which is high in the middle and low in the periphery, the oil pressure P1 of the cavity above the valve core also forms a pressure gradient which is high in the middle and low in the periphery, the oil pressure at the upper end and the lower end of the valve core 31 can be basically kept balanced, the pressure imbalance influence of the valve core caused by the oil pressure gradient is eliminated, the position of the valve core can be accurately controlled by controlling the electromagnetic force and setting, the phenomenon that the valve core is actively closed without being controlled by human in the valve closing process is avoided, and the phenomenon that the valve core cannot be opened in the valve opening process is also avoided.
To further understand the concept of the present invention, the present embodiment breaks the opening and closing of the valve into four operating states, each described below.
1) An opening state: when the valve is completely opened, the valve body oil discharge hole 303 on the valve body 30 is communicated with the annular pressure relief groove 312 on the valve core 31, so that the pressure balance effect can be achieved, and as the valve is normally opened, a part of engine oil can be additionally discharged from the peripheral pressure relief oil passage B1, but the function of the valve is not influenced.
2) In the closing process: the valve body relief hole 303 is always in communication with the annular relief groove 312 on the valve spool 31 and the valve operates normally.
3) Closing moment: at the moment when the valve is just closed, the valve core 31 can completely block the oil outlet 302, at this time, the valve body pressure relief hole 303 and the annular pressure relief groove 312 on the valve core 31 are still communicated, and the stress of the valve core 31 is still balanced.
4) A fully closed state: after the valve is closed, as the valve core 31 moves downwards continuously, at this time, the annular pressure relief groove 312 on the valve core 31 is no longer communicated with the valve body pressure relief hole 303, the valve body pressure relief hole 303 is blocked by the outer circle of the valve core 31, at this time, the valve has no flow, no pressure gradient exists in the cavity below the valve core, and the valve core can play a role in pressure balance through the pressure balance hole 311 above.
Example 2
As shown in fig. 6 and 7, the structure of embodiment 2 is substantially the same as that of embodiment 1, except that the arrangement manner of the peripheral pressure relief oil passage is different, the peripheral pressure relief oil passage B2 is provided on the valve core 31, the peripheral pressure relief oil passage B2 includes a plurality of longitudinal pressure relief grooves 314 uniformly distributed in the circumferential direction and provided on the outer circumferential surface of the valve core 31, and during the valve opening or closing process, the longitudinal pressure relief grooves 314 communicate the valve body inner cavity located above the valve core 31 with the low pressure region at the oil outlet 302, so as to achieve the purpose of pressure balancing. In order to provide lubrication to the valve body 31, the outer peripheral surface of the valve body 31 is provided with a plurality of circumferentially disposed oil reservoir grooves 315, which can also be implemented in embodiment 1.
For example, in embodiment 2, instead of providing the longitudinal pressure relief groove 314, an annular flow passage gap between the outer peripheral surface of the valve element 31 and the cavity guide hole of the valve body 30 is adjusted so that the flow rate of the annular flow passage gap is not less than the flow rate of the pressure balance hole 311, and the annular flow passage gap functions as a peripheral pressure relief oil passage.
All such modifications which come within the spirit, principle, structure and method of the invention are intended to be included within the scope of this invention.
Claims (11)
1. A large-traffic intelligent control solenoid valve of engine piston cooling system includes:
the electromagnetic valve comprises an electromagnet device, a valve device and a push rod for transmitting electromagnetic force generated by the electromagnet device to the valve device;
the electromagnet device comprises an electromagnetic coil, a shell is arranged on the outer side of the electromagnetic coil, a magnetism isolating sleeve is arranged on the inner side of the electromagnetic coil, an upper magnetic yoke is arranged at the upper end of the electromagnetic coil, a lower magnetic yoke is arranged at the lower end of the electromagnetic coil, a movable armature is arranged in the magnetism isolating sleeve, and the movable armature is in sliding fit with the magnetism isolating sleeve;
the valve device comprises a valve body, the valve body and the lower magnetic yoke are integrally arranged, the lower magnetic yoke part of the valve body is provided with an inner connecting part and an outer connecting part, the outer connecting part is fixedly connected with the shell, and the inner connecting part extends into the magnetic isolation sleeve and is in sealing connection with the magnetic isolation sleeve; the valve body is provided with a valve body inner cavity, the lower end part of the valve body is provided with an oil inlet, the side peripheral wall of the valve body is provided with an oil outlet, the oil inlet and the oil outlet are respectively communicated with the valve body inner cavity, a valve core and a reset spring are arranged in the valve body inner cavity, the valve core is in sliding fit with a guide hole in the valve body inner cavity, a lower magnetic yoke part of the valve body is provided with a central through hole, and the central through hole is communicated with the valve body inner cavity;
the ejector rod extends into the inner cavity of the valve body from the central through hole of the valve body and abuts against the position between the movable armature and the valve core;
the center of the valve core is provided with a pressure balance hole which is communicated with the inner cavities of the valve body at the upper end and the lower end of the valve core; it is characterized in that the preparation method is characterized in that,
and a peripheral pressure relief oil duct is arranged between the valve core and the valve body and communicates the inner cavity of the valve body above the valve core with a low-pressure area at the oil outlet.
2. The large-flow intelligent control electromagnetic valve of the engine piston cooling system according to claim 1, wherein the peripheral pressure relief oil passage includes an annular pressure relief groove formed on a peripheral surface of the valve element, a valve element pressure relief hole formed on the valve element, and a valve body pressure relief hole formed on the valve body, the valve element pressure relief hole is communicated with the annular pressure relief groove, and the annular pressure relief groove is selectively communicated with or closed by the valve body pressure relief hole during opening or closing of the valve.
3. The large-flow intelligent control electromagnetic valve of the engine piston cooling system according to claim 1, wherein the peripheral pressure relief oil passage comprises a plurality of longitudinal pressure relief grooves formed in the outer peripheral surface of the valve core.
4. The high-flow intelligent control electromagnetic valve of the engine piston cooling system according to claim 3, wherein the longitudinal pressure relief grooves are circumferentially and uniformly distributed.
5. The high-flow intelligent control electromagnetic valve of the engine piston cooling system according to claim 1, wherein the peripheral pressure relief oil passage is an annular flow-passing gap between the outer peripheral surface of the valve core and the inner cavity guide hole of the valve body, and the flow rate of the annular flow-passing gap is not less than that of the pressure balance hole.
6. The high-flow intelligent control electromagnetic valve for the engine piston cooling system according to claim 1, wherein a plurality of circumferentially arranged oil storage grooves are formed in the outer peripheral surface of the valve core.
7. The engine piston cooling system high flow intelligent control solenoid valve of claim 1, characterized in that said pressure balance bore comprises an axial bore and a radial bore in communication with each other.
8. The high-flow intelligent control electromagnetic valve of the engine piston cooling system according to claim 1, wherein a first sealing ring is arranged between the inner connecting part and the magnetism isolating sleeve.
9. The high-flow intelligent control electromagnetic valve for the engine piston cooling system according to claim 1, wherein a second sealing ring is arranged between the external connecting part and the electromagnetic coil.
10. The engine piston cooling system high flow intelligent control solenoid valve of claim 1, wherein said upper yoke is a plate-like magnetic conductive plate disposed between said housing and an end of said electromagnetic coil.
11. The engine piston cooling system high flow intelligent control solenoid valve of claim 1, characterized in that the outer peripheral surface of said outer connecting portion extends into the inner peripheral surface of said housing and is interference connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157341.5A CN111237538A (en) | 2020-03-09 | 2020-03-09 | Large-flow intelligent control electromagnetic valve of engine piston cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157341.5A CN111237538A (en) | 2020-03-09 | 2020-03-09 | Large-flow intelligent control electromagnetic valve of engine piston cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111237538A true CN111237538A (en) | 2020-06-05 |
Family
ID=70865373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010157341.5A Pending CN111237538A (en) | 2020-03-09 | 2020-03-09 | Large-flow intelligent control electromagnetic valve of engine piston cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111237538A (en) |
-
2020
- 2020-03-09 CN CN202010157341.5A patent/CN111237538A/en active Pending
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