CN108119276B - Piezoelectric high-speed large-flow two-position three-way valve - Google Patents

Piezoelectric high-speed large-flow two-position three-way valve Download PDF

Info

Publication number
CN108119276B
CN108119276B CN201711383365.7A CN201711383365A CN108119276B CN 108119276 B CN108119276 B CN 108119276B CN 201711383365 A CN201711383365 A CN 201711383365A CN 108119276 B CN108119276 B CN 108119276B
Authority
CN
China
Prior art keywords
cavity
valve
valve core
oil
valve body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201711383365.7A
Other languages
Chinese (zh)
Other versions
CN108119276A (en
Inventor
范玉
贺玉海
杨建国
余永华
丁鹏
谢良涛
王勤鹏
胡磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN201711383365.7A priority Critical patent/CN108119276B/en
Publication of CN108119276A publication Critical patent/CN108119276A/en
Application granted granted Critical
Publication of CN108119276B publication Critical patent/CN108119276B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The invention discloses a piezoelectric high-speed large-flow two-position three-way valve which comprises a valve body with an opening end and a closed end, wherein the opening end of the valve body is provided with a valve cover, and an inner cavity of the valve body is a stepped cavity formed by a first cavity and a second cavity; an outer valve core penetrates through the first cavity, one end of the outer valve core extends towards the closed end of the valve body, and the other end of the outer valve core extends towards the open end of the valve body and penetrates into the second cavity; a piezoelectric ring which is annular and can be electrified and deformed to drive the outer valve core to axially slide is arranged between the outer valve core and the valve cover in the second cavity; the inner cavity of the outer valve core is sequentially divided into a first cavity, a second cavity, a third cavity and a fourth cavity from one end facing the opening end to the other end; a first inner valve core penetrates through the first cavity, and a second inner valve core penetrates through the fourth cavity. The invention utilizes the inverse piezoelectric effect of the piezoelectric ring to enable the outer valve core to respond and act quickly, and has high control precision, large flow and high response speed.

Description

Piezoelectric high-speed large-flow two-position three-way valve
Technical Field
The invention relates to a two-position three-way valve, in particular to a piezoelectric type high-speed large-flow two-position three-way valve.
Background
At present, the electric control fuel injection system of the marine diesel engine has very high requirements on a high-speed large-flow electromagnetic valve: the requirements of large flow, high-speed response, high control precision, good consistency and the like must be met simultaneously; at the same time, it is also necessary to be able to operate stably and reliably at very high frequencies in accordance with the control requirements of the system under severe conditions such as high pressure, high temperature, high humidity and vibration. However, the high-pressure large flow rate and the quick response of the high-speed large flow valve are often in conflict, the requirement of the large flow rate needs to be realized by improving the flow area of a valve port of the valve, so that the valve core mass of the valve is increased, the movement inertia of the valve core is increased, and the quick response characteristic of the electromagnetic valve is reduced; in addition, the high-pressure oil in the valve cavity of the electromagnetic valve can also increase the resistance of the valve core to open or close, and the response time of the electromagnetic valve is prolonged. Therefore, the development of the high-speed large flow valve enables the response speed and the flow capacity of the high-speed large flow valve to meet the fuel injection control requirement of the electric control fuel injector, and is a key technology which needs to be solved for the practicability of the electric control fuel injection system of the marine diesel engine.
In the prior art, chinese utility model patent with publication number CN1131387C discloses a two-position three-way solenoid valve with double free inner cone valve core, which has high-speed dynamic response performance and large flow rate characteristics, but has the following problems in practical use: because the outer valve core of the electromagnetic valve is reset by the elastic force of the reset spring, and the springs of the same type hardly ensure the same accurate elastic force, the electromagnetic valve hardly ensures that the electromagnetic valves of the same type have the same response speed during production, thereby causing the control precision of the electromagnetic valve to be low.
Chinese patent No. CN103851226B discloses a high-speed high-flow self-resetting electromagnetic valve, which has high-speed dynamic response performance and high-flow characteristics, but has the following problems in practical use: because the outer valve core of the electromagnetic valve is reset by hydraulic pressure, the electromagnetic force required for opening the electromagnetic valve is large, the trigger current is large, the heating is serious after long-time work, and the hydraulic pressure is complicated in the opening and closing change of the electromagnetic valve, the electromagnetic valve is difficult to have the same response speed, so that the control precision of the electromagnetic valve is not high.
Disclosure of Invention
The invention aims to provide a piezoelectric high-speed large-flow two-position three-way valve which is high in control precision, large in flow and high in response speed.
In order to achieve the purpose, the piezoelectric high-speed large-flow two-position three-way valve provided by the invention comprises a valve body with an opening end and a closed end, wherein the opening end of the valve body is provided with a valve cover, and the piezoelectric high-speed large-flow two-position three-way valve is characterized in that: the inner cavity of the valve body is a stepped cavity formed by a first cavity and a second cavity; an outer valve core penetrates through the first cavity, one end of the outer valve core extends towards the closed end of the valve body, and the other end of the outer valve core extends towards the open end of the valve body and penetrates into the second cavity; a piezoelectric ring which is annular and can be electrified and deformed to drive the outer valve core to axially slide is arranged between the outer valve core and the valve cover in the second cavity; the inner cavity of the outer valve core is sequentially divided into a first cavity, a second cavity, a third cavity and a fourth cavity from one end facing the opening end to the other end; a first inner valve core penetrates through the first cavity, and a second inner valve core penetrates through the fourth cavity. Therefore, the annular piezoelectric ring which can be electrically deformed is arranged between the outer valve core and the valve cover, so that the outer valve core and the piezoelectric ring are connected into a whole, the inverse piezoelectric effect of the piezoelectric ring is utilized, the outer valve core can quickly respond and act, the possibility of influence of electromagnetic interference on the outer valve core is eliminated, the electromagnetic interference of the electromagnetic valve on other electrical appliances is also eliminated, and the electromagnetic valve has high control precision, large flow and high response speed; meanwhile, the driving current of the piezoelectric ring is very small, so that the problem that the electromagnetic valve generates heat when working for a long time is effectively solved, and the service life is prolonged.
Furthermore, the valve body is provided with an oil inlet connected with an external common rail pipe, a control port connected with an external oil injector and an oil return port connected with an external oil tank; an oil inlet corresponding to the oil inlet is formed in the first cavity, a control hole corresponding to the control port is formed in the third cavity, and an oil return hole corresponding to the oil return port is formed in the fourth cavity.
Further, still be provided with first draining passageway and second draining passageway on the valve body, the one end and the second cavity intercommunication of first draining passageway, the other end and the one end intercommunication of second draining passageway of first draining passageway, the other end and the oil return opening intercommunication of second draining passageway.
Furthermore, a one-way oil drainage valve assembly is arranged at the intersection of the first oil drainage channel and the second oil drainage channel on the valve body. Like this, through set up first draining passageway and second draining passageway on the valve body, and the department of crossing of first draining passageway and second draining passageway is provided with one-way draining valve subassembly, just so with the oil return opening and the draining mouth integration of solenoid valve together, can control the intercommunication or the disconnection of first draining passageway and second draining passageway through one-way draining valve subassembly in addition, simplified the structure of this solenoid valve, also saved the connection of pipeline in the valve body.
Furthermore, the one-way oil drain valve component comprises a base, a spring and a one-way valve ball; the base is fixedly arranged on the valve body and is arranged right opposite to the first oil drainage channel, the bottom end of the spring is abutted to the base, the top end of the spring is abutted to the check valve ball, and the check valve ball can compress the spring downwards under the action of oil pressure in the first oil drainage channel to communicate the first oil drainage channel and the second oil drainage channel.
Furthermore, a displacement sensor for monitoring the movement position of the piezoelectric ring is arranged on the side wall of the valve body, so that the whole-course movement monitoring can be realized.
Further, the outer wall of one end of the piezoelectric ring is in threaded connection with the inner wall of the inner cavity of the valve cover, and the inner wall of the other end of the piezoelectric ring is in threaded connection with the outer wall of one end, facing the valve cover, of the outer valve core. Therefore, the piezoelectric ring is fixed in a threaded connection mode, and the fixing mode can effectively prevent the piezoelectric ring from being indefinite in the stretching direction in a cavity formed by the valve cover and the valve body, so that the piezoelectric ring is prevented from being indefinite in the stretching direction in the movement process; meanwhile, the fixing mode is more convenient for installing and positioning the piezoelectric ring and the first inner valve core.
Further, the radius of the fourth cavity is larger than that of the first cavity, the radius of the first cavity is larger than that of the third cavity, and the radius of the third cavity is larger than that of the second cavity.
Furthermore, one end of the first inner valve core is abutted with the valve cover, the other end of the first inner valve core can be abutted with the end face of the second cavity under the action of axial sliding of the outer valve core, and the abutting face of the first inner valve core and the abutting face of the second cavity are in conical surface fit;
one end of the second inner valve core is abutted with the closed end of the valve body, the other end of the second inner valve core can be abutted with the end face of the third cavity under the action of axial sliding of the outer valve core, and the abutting face of the second inner valve core and the third cavity is in conical surface fit.
Furthermore, the valve body is provided with a joint for electrifying the piezoelectric ring.
Compared with the prior art, the invention has the following advantages:
firstly, a piezoelectric ring which is annular and can be electrically deformed is arranged between the outer valve core and the valve cover, so that the outer valve core and the piezoelectric ring are connected into a whole, the inverse piezoelectric effect of the piezoelectric ring is utilized, the outer valve core can quickly respond and act, the possibility of influence of electromagnetic interference on the outer valve core is eliminated, the electromagnetic interference of an electromagnetic valve on other electrical appliances is also eliminated, and the control precision is high, the flow is large, and the response speed is high; meanwhile, the driving current of the piezoelectric ring is very small, so that the problem that the electromagnetic valve generates heat when working for a long time is effectively solved, and the service life is prolonged.
Secondly, the first oil drainage channel and the second oil drainage channel are arranged on the valve body, and the one-way oil drainage valve assembly is arranged at the intersection of the first oil drainage channel and the second oil drainage channel, so that an oil return port and an oil drainage port of the electromagnetic valve are integrated together, and the connection or disconnection of the first oil drainage channel and the second oil drainage channel can be controlled through the one-way oil drainage valve assembly, thereby simplifying the structure of the electromagnetic valve and saving the connection of pipelines in the valve body.
Thirdly, the piezoelectric ring is fixed in a threaded connection mode, and the fixing mode can effectively prevent the piezoelectric ring from being indefinite in the stretching direction in a cavity formed by the valve cover and the valve body, so that the piezoelectric ring is prevented from being indefinite in the stretching direction in the movement process; meanwhile, the fixing mode is more convenient for installing and positioning the piezoelectric ring and the first inner valve core.
Fourthly, the first cavity and the second cavity are formed in the valve body through one-time positioning processing, and round holes do not need to be additionally formed in the valve cover through two-time positioning processing, so that the processing technology of the valve cover and the valve body is simplified, and the cost is reduced; and the valve body is integrally processed, so that the assembly process requirement is reduced, and meanwhile, the sealed components are also reduced.
Fifthly, the whole-course motion monitoring can be realized by additionally arranging the displacement sensor on the valve body.
Sixth, according to the invention, the butting surfaces of the first inner valve core and the second cavity are in conical surface fit, and the butting surfaces of the second inner valve core and the third cavity are in conical surface fit, so that the sealing performance between the first inner valve core and the third cavity is improved.
Drawings
FIG. 1 is a schematic structural diagram of a piezoelectric high-speed large-flow two-position three-way valve in a main view;
FIG. 2 is a schematic side view of the piezoelectric high-speed high-flow two-position three-way valve shown in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the piezoelectric high-speed large-flow two-position three-way valve shown in FIG. 1 along the direction A-A when the valve is in an energized state;
FIG. 4 is a schematic cross-sectional view of the piezoelectric high-speed large-flow two-position three-way valve shown in FIG. 1 along the B-B direction in the power-on state;
FIG. 5 is a schematic cross-sectional view of the piezoelectric high-speed large-flow two-position three-way valve shown in FIG. 1 along the A-A direction in a power-off state;
FIG. 6 is a schematic cross-sectional view of the piezoelectric high-speed large-flow two-position three-way valve shown in FIG. 5 along the C-C direction in a power-off state;
FIG. 7 is an enlarged schematic view of the outer spool of FIG. 3;
in the figure, a valve body 1 (an open end 1.1, a closed end 1.2, a first cavity 1.3, a second cavity 1.4), a valve cover 2, an outer valve core 3 (a first cavity 3.1, a second cavity 3.2, a third cavity 3.3, a fourth cavity 3.4), a piezoelectric ring 4, a first inner valve core 5, a second inner valve core 6, an oil inlet hole 7.1, a control hole 7.2, an oil return hole 7.3, an oil inlet 8.1, a control port 8.2, an oil return port 8.3, a first oil drainage channel 9.1, a second oil drainage channel 9.2, a one-way oil drainage valve component 10, a base 10.1, a spring 10.2, a one-way valve ball 10.3, a displacement sensor 11 and a joint 12.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The piezoelectric high-speed large-flow two-position three-way valve comprises a valve body 1 with an opening end 1.1 and a closed end 1.2, wherein the opening end 1.1 of the valve body 1 is provided with a valve cover 2, and an inner cavity of the valve body 1 is a stepped cavity formed by a first cavity 1.3 and a second cavity 1.4; an outer valve core 3 penetrates through the first cavity 1.3, one end of the outer valve core 3 extends towards the closed end 1.2 of the valve body 1, and the other end of the outer valve core 3 extends towards the open end 1.1 of the valve body 1 and penetrates into the second cavity 1.4; a piezoelectric ring 4 which is annular and can be electrified and deformed is arranged between the outer valve core 3 and the valve cover 2 in the second cavity 1.4, and the piezoelectric ring 4 can be made of piezoelectric ceramic materials. The outer wall of one end of the piezoelectric ring 4 is in threaded connection with the inner wall of the inner cavity of the valve cover 2, and the inner wall of the other end of the piezoelectric ring 4 is in threaded connection with the outer wall of one end, facing the valve cover 2, of the outer valve core 3. A piezoelectric ring 4 which is annular and can be electrified and deformed to drive the outer valve core 3 to axially slide is arranged between the outer valve core 3 and the valve cover 2, so that the outer valve core 3 and the piezoelectric ring 4 are connected into a whole, the inverse piezoelectric effect of the piezoelectric ring 4 is utilized, the outer valve core 3 can rapidly respond and act, the possibility of influence of electromagnetic interference on the outer valve core is eliminated, the electromagnetic interference of an electromagnetic valve on other electrical appliances is also eliminated, and the control precision is high, the flow is large, and the response speed is high; meanwhile, the driving current of the piezoelectric ring 4 is very small, so that the problem that the electromagnetic valve generates heat when working for a long time is effectively solved, and the service life is prolonged.
In the technical scheme, the inner cavity of the outer valve core 3 is sequentially divided into a first cavity 3.1, a second cavity 3.2, a third cavity 3.3 and a fourth cavity 3.4 from one end facing the opening end 1.1 to the other end, the radius of the fourth cavity 3.4 is larger than that of the first cavity 3.1, the radius of the first cavity 3.1 is larger than that of the third cavity 3.3, and the radius of the third cavity 3.3 is larger than that of the second cavity 3.2; a first inner valve core 5 penetrates through the first cavity 3.1, a second inner valve core 6 penetrates through the fourth cavity 3.4, one end of the first inner valve core 5 is abutted with the valve cover 2, the other end of the first inner valve core can be abutted with the end face of the second cavity 3.2 under the action of axial sliding of the outer valve core 3, and abutting faces of the first inner valve core 5 and the second cavity 3.2 are in conical surface fit; one end of the second inner valve core 6 is abutted with the closed end 1.2 of the valve body 1, the other end of the second inner valve core can be abutted with the end face of the third cavity 3.3 under the axial sliding action of the outer valve core 3, and the abutting face of the second inner valve core 6 and the third cavity 3.3 is in conical surface fit.
In the technical scheme, an oil inlet 8.1 used for being connected with an external common rail pipe, a control port 8.2 used for being connected with an external oil injector and an oil return port 8.3 used for being connected with an external oil tank are arranged on a valve body 1; an oil inlet 7.1 corresponding to the oil inlet 8.1 is arranged on the first cavity 3.1, a control hole 7.2 corresponding to the control port 8.2 is arranged on the third cavity 3.3, and an oil return hole 7.3 corresponding to the oil return port 8.3 is arranged on the fourth cavity 3.4. The side wall of the valve body 1 is provided with a displacement sensor 11 for monitoring the movement position of the piezoelectric ring 4, and the valve body 1 is provided with a connector 12 for electrifying the piezoelectric ring 4.
In the above technical scheme, the valve body 1 is further provided with a first oil drainage channel 9.1 and a second oil drainage channel 9.2, one end of the first oil drainage channel 9.1 is communicated with the second cavity 1.4, the other end of the first oil drainage channel 9.1 is communicated with one end of the second oil drainage channel 9.2, and the other end of the second oil drainage channel 9.2 is communicated with the oil return opening 8.3. A one-way oil drain valve assembly 10 is arranged at the intersection of the first oil drain passage 9.1 and the second oil drain passage 9.2 on the valve body 1. The one-way oil drain valve assembly 10 comprises a base 10.1, a spring 10.2 and a one-way valve ball 10.3; the base 10.1 is fixed to be set up on valve body 1 just to arranging with first draining passageway 9.1, the bottom and the base 10.1 butt of spring 10.2, the top and the check valve pearl 10.3 butt of spring 10.2, check valve pearl 10.3 can be in the effect of first draining passageway 9.1 internal oil pressure down compression spring 10.2 in order to communicate first draining passageway 9.1 and second draining passageway 9.2. Like this, through set up first draining passageway 9.1 and second draining passageway 9.2 on valve body 1, and the intersection department at first draining passageway 9.1 and second draining passageway 9.2 is provided with one-way bleeder valve subassembly 10, just so with the oil return opening and the draining opening integration of solenoid valve together, and can control first draining passageway 9.1 and second draining passageway 9.2's intercommunication or disconnection through one-way bleeder valve subassembly 10, the structure of this solenoid valve has been simplified, the connection of pipeline in the valve body has also been saved.
The working principle of the invention is as follows: when the valve is powered on, the piezoelectric ring 4 contracts to drive the outer valve core 3 to move towards the valve cover 1, the first inner valve core 5 is contacted with the mutually matched sealing conical surfaces at the oil inlet 7.1 of the outer valve core 3, an oil inlet 8.1 communicated with the common rail pipe and the corresponding oil inlet 7.1 on the outer valve core 3 are closed, a control port 8.2 communicated with an oil injector is communicated with a control hole 7.2 corresponding to the outer valve core 3, an oil return port 8.3 communicated with an oil tank is communicated with an oil return hole 7.3 corresponding to the outer valve core, and low-pressure oil returns to the oil tank through the oil return port 8.3; when the power is off, the piezoelectric ring 4 can be quickly restored, the outer valve core 3 moves towards the direction of the closed end 1.2, the first inner valve core 5 is contacted with the sealing conical surface matched with the oil return hole 7.3 of the outer valve core 3 to play a role of sealing the oil return opening 8.3, at the moment, the oil inlet 8.1 communicated with the common rail pipe is communicated with the corresponding oil inlet hole 7.1 on the outer valve core 3, the control opening 8.2 communicated with the oil sprayer is communicated with the control hole 7.2 corresponding to the outer valve core 3, the oil pressure of the control opening 8.2 is the same as the oil pressure of the common rail pipe, the oil pressure drives the oil spraying oil sprayer connected with the control opening 8.2, and the high-pressure oil in the oil inlet hole can generate larger restoring force on the outer valve core due to the restoring force of the piezoelectric ring 4, and the response speed of the electromagnetic valve is improved.
The above description is only an embodiment of the present invention, and it should be noted that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a two three-way valves of high-speed large-traffic of piezoelectric type, includes valve body (1) that has open end (1.1) and blind end (1.2), open end (1.1) of valve body (1) is provided with valve gap (2), its characterized in that:
the inner cavity of the valve body (1) is a stepped cavity formed by a first cavity (1.3) and a second cavity (1.4); an outer valve core (3) penetrates through the first cavity (1.3), one end of the outer valve core (3) extends towards the closed end (1.2) of the valve body (1), and the other end of the outer valve core (3) extends towards the open end (1.1) of the valve body (1) and penetrates into the second cavity (1.4); a piezoelectric ring (4) which is annular and can be electrified and deformed to drive the outer valve core (3) to axially slide is arranged between the outer valve core (3) and the valve cover (2) in the second cavity (1.4);
the inner cavity of the outer valve core (3) is sequentially divided into a first cavity (3.1), a second cavity (3.2), a third cavity (3.3) and a fourth cavity (3.4) from one end facing the opening end (1.1) to the other end; a first inner valve core (5) penetrates through the first cavity (3.1), and a second inner valve core (6) penetrates through the fourth cavity (3.4);
an oil inlet (8.1) used for being connected with an external common rail pipe, a control port (8.2) used for being connected with an external oil sprayer and an oil return port (8.3) used for being connected with an external oil tank are arranged on the valve body (1);
an oil inlet hole (7.1) corresponding to the oil inlet (8.1) is formed in the first cavity (3.1), a control hole (7.2) corresponding to the control port (8.2) is formed in the third cavity (3.3), and an oil return hole (7.3) corresponding to the oil return port (8.3) is formed in the fourth cavity (3.4);
a first oil drainage channel (9.1) and a second oil drainage channel (9.2) are further arranged on the valve body (1), one end of the first oil drainage channel (9.1) is communicated with the second cavity (1.4), the other end of the first oil drainage channel (9.1) is communicated with one end of the second oil drainage channel (9.2), and the other end of the second oil drainage channel (9.2) is communicated with the oil return port (8.3);
a one-way oil drainage valve assembly (10) is arranged at the intersection of the first oil drainage channel (9.1) and the second oil drainage channel (9.2) on the valve body (1);
the one-way oil drainage valve assembly (10) comprises a base (10.1), a spring (10.2) and a one-way valve ball (10.3); base (10.1) is fixed to be set up on valve body (1) just to arranging with first draining passageway (9.1), the bottom and base (10.1) butt of spring (10.2), the top and the check valve pearl (10.3) butt of spring (10.2), check valve pearl (10.3) can compress spring (10.2) downwards in order to communicate first draining passageway (9.1) and second draining passageway (9.2) under the effect of first draining passageway (9.1) internal oil pressure.
2. The piezoelectric high-speed high-flow two-position three-way valve according to claim 1, characterized in that: and a displacement sensor (11) for monitoring the movement position of the piezoelectric ring (4) is arranged on the side wall of the valve body (1).
3. The piezoelectric high-speed high-flow two-position three-way valve according to claim 1, characterized in that: the outer wall of one end of the piezoelectric ring (4) is in threaded connection with the inner wall of the inner cavity of the valve cover (2), and the inner wall of the other end of the piezoelectric ring (4) is in threaded connection with the outer wall of one end, facing the valve cover (2), of the outer valve core (3).
4. The piezoelectric high-speed high-flow two-position three-way valve according to claim 1, characterized in that: the radius of the fourth cavity (3.4) is larger than that of the first cavity (3.1), the radius of the first cavity (3.1) is larger than that of the third cavity (3.3), and the radius of the third cavity (3.3) is larger than that of the second cavity (3.2).
5. The piezoelectric high-speed high-flow two-position three-way valve according to claim 1, characterized in that: one end of the first inner valve core (5) is abutted with the valve cover (2), the other end of the first inner valve core can be abutted with the end face of the second cavity (3.2) under the action of axial sliding of the outer valve core (3), and the abutting face of the first inner valve core (5) and the second cavity (3.2) is in conical surface fit;
one end of the second inner valve core (6) is abutted with the closed end (1.2) of the valve body (1), the other end of the second inner valve core can be abutted with the end face of the third cavity (3.3) under the axial sliding action of the outer valve core (3), and the abutting face of the second inner valve core (6) and the third cavity (3.3) is in conical surface fit.
6. The piezoelectric high-speed high-flow two-position three-way valve according to claim 1, characterized in that: the valve body (1) is provided with a joint (12) for electrifying the piezoelectric ring (4).
CN201711383365.7A 2017-12-20 2017-12-20 Piezoelectric high-speed large-flow two-position three-way valve Active CN108119276B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711383365.7A CN108119276B (en) 2017-12-20 2017-12-20 Piezoelectric high-speed large-flow two-position three-way valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711383365.7A CN108119276B (en) 2017-12-20 2017-12-20 Piezoelectric high-speed large-flow two-position three-way valve

Publications (2)

Publication Number Publication Date
CN108119276A CN108119276A (en) 2018-06-05
CN108119276B true CN108119276B (en) 2020-02-07

Family

ID=62230397

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711383365.7A Active CN108119276B (en) 2017-12-20 2017-12-20 Piezoelectric high-speed large-flow two-position three-way valve

Country Status (1)

Country Link
CN (1) CN108119276B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110805719B (en) * 2019-11-08 2022-04-01 武汉理工大学 High-speed large-stroke direct-acting piezoelectric valve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2046401T3 (en) * 1988-08-25 1994-02-01 Hydraulik-Ring Antriebs- Und Steuerungstechnik Gmbh DEVICE TO CONTINUOUSLY INFLUENCE A FLUID CURRENT, ESPECIALLY IN A VALVE.
CN1131387C (en) * 2000-07-28 2003-12-17 武汉理工大学 Two-position and three-way solenoid valve with double free inner conic cores
DE102014108678A1 (en) * 2014-06-20 2015-12-24 Bürkert Werke GmbH spool valve
DE102016205041A1 (en) * 2016-03-24 2017-09-28 Robert Bosch Gmbh spool valve

Also Published As

Publication number Publication date
CN108119276A (en) 2018-06-05

Similar Documents

Publication Publication Date Title
CN104018966B (en) Pressure accumulation current-limiting type electromagnetic control oil sprayer
CN103119283B (en) Valve assembly for an injection valve and injection valve
US9523437B2 (en) Electromagnetic actuator
US20100236526A1 (en) Common rail electronic control injector
US4858956A (en) High pressure, fast response, pressure balanced, solenoid control valve
CN108119276B (en) Piezoelectric high-speed large-flow two-position three-way valve
CN108488473B (en) Pilot-operated piezoelectric valve
JP2016006347A (en) Air bypass valve
CN105422924A (en) One-way conduction fluid sensor
CN203892092U (en) Pressure accumulating and flow limiting electromagnetic control oil atomizer
CN109139319A (en) A kind of common-rail injector
CN102996309B (en) high pressure common rail injector
KR102448665B1 (en) Gas injector with improved contact surfaces
CN109715935A (en) Fluid ejector and needle for fluid ejector
CN204783288U (en) Car double fuel guide rail multi -ported valve
JP2016509162A (en) Valve for fluid control with high sealing performance
CN1131387C (en) Two-position and three-way solenoid valve with double free inner conic cores
CN211082888U (en) Electromagnetic isolation valve
CN214404787U (en) Electric proportional pressure valve
CN109162848B (en) Electric control oil injector system
CN209229073U (en) A kind of automatically controlled valve arrangement with exhaust passage
CN208816259U (en) A kind of common-rail injector
CN102562394A (en) Electromagnetic flow control valve
CN112797185A (en) Electric proportional pressure valve
CN201730718U (en) Injection valve of electric control fuel injector

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant