CN118669585A

CN118669585A - Programmable long-life ultra-high-speed electromagnetic valve and installation method

Info

Publication number: CN118669585A
Application number: CN202410966746.1A
Authority: CN
Inventors: 唐兵; 周安玉; 闫雨潇; 郭大勇; 司国雷
Original assignee: Sichuan Aerospace Fenghuo Servo Control Technology Co ltd
Current assignee: Sichuan Aerospace Fenghuo Servo Control Technology Co ltd
Priority date: 2024-07-18
Filing date: 2024-07-18
Publication date: 2024-09-20

Abstract

The invention discloses a programmable long-life ultrahigh-speed electromagnetic valve and an installation method thereof, wherein the electromagnetic valve comprises a valve seat, a valve core, a shell, an armature, a permanent magnet, a stop seat, a framework, a coil, an end cover, a circuit board housing, a circuit board, a lead-out wire, a reset spring and a magnetic conduction gasket; the left end of the permanent magnet is contacted with the shell, the right end of the permanent magnet is contacted with the stop seat, the end cover is connected with the shell through threads, and the stop seat is pressed by the magnetic conductive gasket, so that the permanent magnet is pressed; the magnetic force lines of the permanent magnet are axial magnetic force lines; when in a closed state, most magnetic force lines of the permanent magnet mainly form a closed loop through the shell, the end cover, the magnetic conduction gasket and the stop seat; in the open state, most magnetic force lines of the permanent magnet mainly form a closed loop through the armature and the stop seat. The invention can realize the ultra-high speed switch of the valve core by adopting the optimized combination of the permanent magnet and the coil, and does not need to maintain current to keep open (normally closed) or close (normally open).

Description

Programmable long-life ultra-high-speed electromagnetic valve and installation method

Technical Field

The invention relates to the field of hydraulic switch control valves used by hydraulic control systems, in particular to a programmable long-life ultra-high-speed electromagnetic valve and an installation method.

Background

Solenoid valves (Solenoidvalve) are solenoid-operated industrial equipment, are automated basic elements for controlling fluids, are actuators, and can be used in hydraulic systems as well as pneumatic systems. It is mainly used for adjusting the direction, flow, speed and other parameters of the medium. The electromagnetic valve is internally provided with a closed cavity, through holes are formed in different positions, and each hole is connected with a different oil pipe. The middle of the cavity is a valve body, and two sides are electromagnets. When the electromagnet coil is electrified, the valve body is attracted to the direction of the electrified electromagnet, so that different oil drain holes are opened or closed. The movement of the valve body enables hydraulic oil to enter different oil discharge pipes, and the oil cylinder piston is pushed by the pressure of the oil, so that the mechanical device is driven to move. The control of mechanical movement is realized by controlling the current on-off of the electromagnet.

Solenoid valves can be divided into: (1) direct-acting solenoid valve: when the electromagnetic valve is electrified, the electromagnetic coil generates electromagnetic force to lift the closing piece from the valve seat, and the valve is opened; when the power is off, the electromagnetic force disappears, the spring presses the closing member against the valve seat, and the valve is closed. Is suitable for vacuum, negative pressure and zero pressure environments, but the drift diameter is generally not more than 25mm. (2) a step-by-step direct-acting electromagnetic valve: the direct-acting and pilot-operated principle is combined, and the hydraulic pump is suitable for zero-pressure difference or vacuum and high-pressure environments, but has higher power and needs horizontal installation. (3) a pilot-operated solenoid valve: when the power is on, the pilot hole is opened by electromagnetic force, and the main valve is pushed to open by fluid pressure difference; when the power is off, the spring force closes the pilot hole, and the fluid pressure pushes the closing member to close the valve. The device is suitable for high-pressure environment and can be installed (to be customized) at will.

However, the solenoid valve of the prior art has the following problems: the traditional high-speed electromagnetic valve has the response time of opening and closing of most of more than 2 ms; the service life is mostly 3×10 ⁸ times or less; the normally open and normally closed structures of the electromagnetic valve have larger difference, and can not be modified by a program after being assembled; the holding current is required for holding.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a programmable long-life ultra-high-speed electromagnetic valve and an installation method.

The aim of the invention is realized by the following technical scheme:

the invention provides a programmable long-life ultrahigh-speed electromagnetic valve, which comprises a valve seat, a valve core, a shell, an armature, a permanent magnet, a stop seat, a framework, a coil, an end cover, a circuit board housing, a circuit board, a lead-out wire, a reset spring and a magnetic conduction gasket, wherein the valve seat is arranged on the valve core;

the valve seat and the shell are welded into a whole, and the valve core and the armature are welded into a whole; the welded valve core is arranged in a hole of the valve seat, and the sharp edge at the left end of the valve core is contacted with the beta chamfer of the valve seat to form sharp edge valve port seal; the valve core and the valve seat are in clearance seal through a certain sealing length;

the reset spring is arranged in the hole of the armature;

The left end of the permanent magnet is contacted with the shell, the right end of the permanent magnet is contacted with the stop seat, the end cover is connected with the shell through threads, and the stop seat is pressed by the magnetic conductive gasket, so that the permanent magnet is pressed; the magnetic force lines of the permanent magnet are axial magnetic force lines;

the coil is wound on the framework and is arranged in an installation space formed by the shell, the stop seat, the magnetic conduction gasket and the end cover;

The coil is led out and welded to the circuit board through a wire outlet hole on the shell; one end of the shell, which is far away from the valve seat, is connected with a circuit board housing, and the circuit board is arranged in the circuit board housing; the circuit board is connected with the lead-out wire through a wire outlet hole on the circuit board housing;

when in a closed state, most magnetic force lines of the permanent magnet mainly form a closed loop through the shell, the end cover, the magnetic conduction gasket and the stop seat; in the open state, most magnetic force lines of the permanent magnet mainly form a closed loop through the armature and the stop seat.

Further, the solenoid valve further comprises a gasket arranged in the hole of the armature, and the pretightening force of the return spring is adjusted by adjusting the thickness or the assembly quantity of the gasket.

Further, soft sealing is carried out between the left end of the permanent magnet and the shell and between the right end of the permanent magnet and the stop seat through the first sealing ring.

Further, epoxy resin is encapsulated in the cavity of the circuit board housing to fix and seal the circuit board.

Further, the valve seat and the shell are welded into a whole through laser welding, and the valve core and the armature are welded into a whole through laser welding;

the valve seat is made of high-hardness wear-resistant materials and is used for bearing high-frequency impact of the valve core, and the shell is made of high-permeability soft magnetic alloy, so that the requirement of the electromagnetic valve on magnetic conductivity is met.

Further, uniform pressure equalizing grooves are formed in the outer circular surface of the valve core.

Further, the left end of the valve core is provided with an arc transition with a radius Rx, an angle alpha is formed by crossing the intersection point of the Rx arc and the outer circle of the valve core and the beta chamfer angle of the tangent line of the Rx arc and the valve seat, and the distance L between the left end of the valve core and the intersection point of the Rx arc and the outer circle of the valve core balances the steady-state hydrodynamic force born by the valve core by matching the relation between the four parameters.

In a second aspect of the present invention, there is provided a method for installing a programmable long-life ultra-high speed electromagnetic valve according to the first aspect, comprising the steps of:

The valve core and the armature which are welded into a whole are arranged in corresponding holes of the valve seat and the shell which are welded into a whole;

sequentially loading a reset spring, a permanent magnet, a stop seat, a coil wound on a framework, a magnetic conduction gasket and an end cover;

the circuit board and the circuit board housing are mounted and the wiring connection is completed.

The beneficial effects of the invention are as follows:

in an exemplary embodiment of the present invention, by employing an optimized combination of permanent magnets and coils, ultra-high speed switching of the spool can be achieved without the need for a maintenance current to remain open (normally closed) or closed (normally open).

Drawings

FIG. 1 is a schematic diagram showing the closing of a magnetic circuit in a closed state of a programmable long-life ultra-high speed solenoid valve according to an exemplary embodiment of the present invention;

FIG. 2 is a schematic diagram showing the closing of a magnetic circuit in an open state of a programmable long-life ultra-high speed solenoid valve according to an exemplary embodiment of the present invention;

FIG. 3 is a schematic view of a welded housing structure according to an exemplary embodiment of the present invention;

FIG. 4 is a schematic diagram of a welding structure of a valve core according to an exemplary embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of an exemplary embodiment of the present invention;

FIG. 6 is a schematic diagram of control logic of a circuit board according to an exemplary embodiment of the present invention;

FIG. 7 is a flowchart of a method for installing a programmable long-life ultra-high speed solenoid valve according to an exemplary embodiment of the invention;

In the figure, a valve seat 1, a valve core 2, a housing 3, an armature 4, a permanent magnet 5, a stop 6, a framework 7, a coil 8, an end cover 9, a circuit board housing 10, a circuit board 11, a lead-out wire 12, a second sealing ring 13, a gasket 14, a third sealing ring 15, a return spring 16, a first sealing ring 17 and a magnetic conduction gasket 18 are arranged.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully understood from the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that directions or positional relationships indicated as being "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships described based on the drawings are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1-2, a programmable long life ultra-high speed solenoid valve provided in an exemplary embodiment of the invention is shown, comprising a valve seat 1, a valve core 2, a housing 3, an armature 4, a permanent magnet 5, a stop seat 6, a frame 7, a coil 8, an end cap 9, a circuit board housing 10, a circuit board 11, a lead-out wire 12, a return spring 16 and a magnetically conductive gasket 18;

As shown in fig. 3, the valve seat 1 is welded with the housing 3, and as shown in fig. 4, the valve core 2 is welded with the armature 4; the welded valve core 2 is arranged in a hole of the valve seat 1, and the sharp edge at the left end of the valve core 2 is contacted with the beta chamfer of the valve seat 1 to form sharp edge valve port seal; the valve core 2 and the valve seat 1 are in clearance seal through a certain sealing length;

a return spring 16 is mounted in the bore of the armature 4;

The left end of the permanent magnet 5 is contacted with the shell 3, the right end is contacted with the stop seat 6, the end cover 9 is connected with the shell 3 through threads, and the stop seat 6 is pressed by the magnetic-conductive gasket 18, so that the permanent magnet 5 is pressed; the magnetic force lines of the permanent magnet 5 are axial magnetic force lines;

the coil 8 is wound on the framework 7 and is arranged in an installation space formed by the shell 3, the stop seat 6, the magnetic conduction gasket 18 and the end cover 9;

The coil 8 is led out and welded to the circuit board 11 through a wire outlet hole on the shell 3; the end of the housing 3 remote from the valve seat 1 is connected (preferably screwed) to a circuit board housing 10, the circuit board 11 being mounted in the circuit board housing 10; the circuit board 11 is connected with the lead-out wires 12 through wire outlet holes on the circuit board housing 10;

as shown in fig. 1, in the closed state, most of magnetic force lines of the permanent magnet 5 mainly form a closed loop through the shell 3, the end cover 9, the magnetic conductive gasket 18 and the stop seat 6; as shown in fig. 2, in the open state, most of the magnetic field lines of the permanent magnet 5 form a closed loop mainly through the armature 4 and the stop 6.

Specifically, in the present exemplary embodiment, P and a in fig. 1 and 2 are the oil inlet and the oil outlet of the ultra-high speed solenoid valve. When the level of the input signal of the circuit board 11 changes from low to high or from high to low, the circuit board 11 programs the current of the coil 8 to flow from positive to negative or from negative to positive, so that the magnetic force lines generated by the coil 8 push the magnetic force lines of the permanent magnet 5 to switch from the closed state to the open state or from the open state to the closed state, and the valve core 2 and the armature 4 are accelerated to open or close under the combined action of the magnetic force generated by the coil 8 and the permanent magnet 5.

In the closed state, as shown in fig. 1, most magnetic force lines of the permanent magnet 5 mainly form a closed loop through the housing 3, the end cover 9, the magnetic conduction gasket 18 and the stop seat 6, at this time, the armature 4 is separated from the stop seat 6, and the force generated by the magnetic force lines of the permanent magnet 5 through the armature 4 and the stop seat 6 is insufficient to overcome the spring force of the return spring 16, so that the valve core 2 is in the closed state (sharp-edged valve port sealing). As shown in fig. 2, in the open state, most of magnetic force lines of the permanent magnet 5 mainly form a closed loop through the armature 4 and the stop seat 6, the armature 4 contacts with the stop seat 6, and the force generated by the permanent magnet 5 overcomes the spring force of the return spring 16, so that the valve core 2 is in the open state. The valve core can be opened and closed at high speed without maintaining current, and can be kept open (normally closed) or closed (normally open).

The permanent magnet 5 provides a permanent magnetic field in the solenoid valve system by its inherent magnetism. When the electromagnetic valve is electrified, the magnetic field generated by the coil 8 is overlapped with the magnetic field of the permanent magnet 5, so that the attraction to the armature 4 is enhanced; when the power is off, the magnetism of the permanent magnet 5 can still be kept stable for a certain time, and the armature 4 can be kept at a specific position. And as shown in fig. 1 and 2, the magnetic force lines of the permanent magnet 5 are axial magnetic force lines, and the magnetic force adsorption speed is faster and the implementation is simpler as the moving direction of the armature 4 is the same.

Through the self-powered circuit board 11, the electromagnetic valve is in a normally open state or a normally closed state when the input signal keeps a low level by programming a program in the circuit board 11, so that the variety of products can be reduced by design; the user can be programmed to be a normally open or normally closed solenoid valve according to actual use. When the input signal is kept at a low or high level, the circuit board 11 program cuts off the power to the left and right coils, and the solenoid valve is kept at an open or closed position by means of the magnetic force or the spring force generated by the permanent magnet (5).

More preferably, in an exemplary embodiment, as shown in fig. 1 and 2, the solenoid valve further includes a spacer 14 disposed in the hole of the armature 4, and the pre-tightening force of the return spring 16 is adjusted by adjusting the thickness or the number of assemblies of the spacer 14.

More preferably, in an exemplary embodiment, as shown in fig. 1 and 2, soft sealing is performed between the left end of the permanent magnet 5 and the housing 3, and between the right end of the permanent magnet 5 and the stop seat 6 by the first sealing ring 17.

Further, as shown in fig. 1 and 2, the second seal ring 13 is provided on the outside of the valve seat 1, and the third seal ring 15 is provided on the outside of the housing 3 for external sealing.

Preferably, in an exemplary embodiment, the circuit board housing 10 is encapsulated with epoxy resin within a cavity that secures and seals the circuit board 11.

More preferably, in an exemplary embodiment, the valve seat 1 and the housing 3 are welded together by laser welding, and the valve core 2 and the armature 4 are welded together by laser welding;

The valve seat 1 is made of high-hardness wear-resistant materials and is used for bearing high-frequency impact of the valve core 2, and the shell 3 is made of high-permeability soft magnetic alloy, so that the requirement of the electromagnetic valve on magnetic conductivity is met.

Specifically, in the present exemplary embodiment, the valve seat 1 and the housing 3 are welded integrally by laser welding; the valve seat 1 is made of high-hardness wear-resistant materials, can bear high-frequency impact of the valve core 2, and the shell 3 is made of high-permeability soft magnetic alloy, so that the requirement of the electromagnetic valve on magnetic conductivity is met; when the electromagnetic valve can reach very long service life (the switching times are more than or equal to 1 multiplied by 10 ⁹ times, and far exceed the high-speed electromagnetic valve of 3 multiplied by 10 ⁸ times in the current market), the electromagnetic valve can be switched on and off at an ultrahigh speed, the switching time is less than or equal to 0.4ms, and the service life (more than 2 ms) of the high-speed switching valve in the current market is shortened by 5 times.

More preferably, in an exemplary embodiment, uniform pressure equalizing grooves are arranged on the outer circumferential surface of the valve core 2, so as to play a role in locking the valve core 2 under high pressure.

More preferably, in an exemplary embodiment, as shown in fig. 5, the left end of the valve core 2 has an arc transition with a radius Rx, an angle α is formed by crossing an intersection point of the arc Rx and the outer circle of the valve core 2 and a tangent line with the arc Rx and a beta chamfer angle of the valve seat 1, and a distance L between the left end of the valve core 2 and the intersection point of the arc Rx and the outer circle of the valve core 2 balances steady-state hydrodynamic forces suffered by the valve core 2 by matching the relationship between the four parameters, so that the valve core 1 can be opened or closed normally at an ultra-high speed.

Preferably, in an exemplary embodiment, as shown in fig. 6, the circuit board 11 mainly includes a single chip microcomputer, a MOS transistor, a power chip, and other devices, so as to control the current direction of the coil; the electromagnetic valve can be defined as normally open or normally closed by modifying the program in the singlechip. The circuit board housing 10 fixes the circuit board 11, and after the lead wires 12 are connected with the circuit board 11 by soldering, the cavity between the circuit board housing 10 and the circuit board 11 is filled and sealed, and the circuit board 11 is further reinforced and fixed.

Referring to fig. 7, fig. 7 shows a method for installing a programmable long-life ultra-high-speed electromagnetic valve according to another exemplary embodiment of the present invention, comprising the steps of:

the valve core 2 and the armature 4 which are welded into a whole are arranged in corresponding holes of the valve seat 1 and the shell 3 which are welded into a whole;

a reset spring 16, a permanent magnet 5, a stop seat 6, a coil 8 wound on a framework 7, a magnetic conduction gasket 18 and an end cover 9 are sequentially arranged;

The circuit board 11 and the circuit board housing 10 are mounted and wiring connection is completed.

It can be seen that the electromagnetic valve according to the present exemplary embodiment is programmable, long in service life, and ultra-high in speed, and can achieve the effect of convenient installation.

It is apparent that the above examples are given by way of illustration only and not by way of limitation, and that other variations or modifications may be made in the various forms based on the above description by those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims

1. A programmable long-life superspeed electromagnetic valve is characterized in that: the magnetic valve comprises a valve seat (1), a valve core (2), a shell (3), an armature (4), a permanent magnet (5), a stop seat (6), a framework (7), a coil (8), an end cover (9), a circuit board housing (10), a circuit board (11), a lead-out wire (12), a reset spring (16) and a magnetic conduction gasket (18);

The valve seat (1) is welded with the shell (3) into a whole, and the valve core (2) is welded with the armature (4) into a whole; the welded valve core (2) is arranged in a hole of the valve seat (1), and the sharp edge at the left end of the valve core (2) is contacted with the beta chamfer of the valve seat (1) to form sharp edge valve port seal; the valve core (2) and the valve seat (1) are in clearance seal through a certain sealing length;

The return spring (16) is arranged in the hole of the armature (4);

The left end of the permanent magnet (5) is contacted with the shell (3), the right end of the permanent magnet is contacted with the stop seat (6), the end cover (9) is connected with the shell (3) through threads, and the stop seat (6) is pressed through the magnetic conduction gasket (18), so that the permanent magnet (5) is pressed; the magnetic force lines of the permanent magnet (5) are axial magnetic force lines;

The coil (8) is wound on the framework (7) and is arranged in an installation space formed by the shell (3), the stop seat (6), the magnetic conduction gasket (18) and the end cover (9);

The coil (8) is led out and welded to the circuit board (11) through a wire outlet hole on the shell (3); one end of the shell (3) far away from the valve seat (1) is connected with a circuit board housing (10), and the circuit board (11) is arranged in the circuit board housing (10); the circuit board (11) is connected with the lead-out wire (12) through a wire outlet hole on the circuit board housing (10);

When in a closed state, most magnetic force lines of the permanent magnet (5) mainly form a closed loop through the shell (3), the end cover (9), the magnetic conduction gasket (18) and the stop seat (6); in the open state, most magnetic force lines of the permanent magnet (5) mainly form a closed loop through the armature (4) and the stop seat (6).

2. A programmable long life ultra high speed solenoid valve according to claim 1, wherein: the solenoid valve also comprises a gasket (14) arranged in the hole of the armature (4), and the pretightening force of the return spring (16) is adjusted by adjusting the thickness or the assembly quantity of the gasket (14).

3. A programmable long life ultra high speed solenoid valve according to claim 1, wherein: soft sealing is carried out between the left end of the permanent magnet (5) and the shell (3) and between the right end of the permanent magnet (5) and the stop seat (6) through a first sealing ring (17).

4. A programmable long life ultra high speed solenoid valve according to claim 1, wherein: epoxy resin is encapsulated in the cavity of the circuit board housing (10) to fix and seal the circuit board (11).

5. A programmable long life ultra high speed solenoid valve according to claim 1, wherein: the valve seat (1) and the shell (3) are welded into a whole through laser welding, and the valve core (2) and the armature (4) are welded into a whole through laser welding;

The valve seat (1) is made of high-hardness wear-resistant materials and is used for bearing high-frequency impact of the valve core (2), and the shell (3) is made of high-permeability soft magnetic alloy, so that the requirement of the electromagnetic valve on magnetic conductivity is met.

6. A programmable long life ultra high speed solenoid valve according to claim 1, wherein: the outer circular surface of the valve core (2) is provided with uniform pressure equalizing grooves.

7. A programmable long life ultra high speed solenoid valve according to claim 1, wherein: the left end of the valve core (2) is provided with an arc transition with a radius Rx, an angle alpha is formed by crossing the intersection point of the Rx arc and the outer circle of the valve core (2) and the beta chamfer angle of the tangent line of the Rx arc and the valve seat (1), and the distance L between the left end of the valve core (2) and the intersection point of the Rx arc and the outer circle of the valve core (2) balances the steady-state hydrodynamic force born by the valve core (2) by matching the relation between the four parameters.

8. A method of installing a programmable long life ultra high speed solenoid valve according to any one of claims 1 to 7, wherein: the method comprises the following steps:

The valve core (2) and the armature (4) which are welded into a whole are arranged in corresponding holes of the valve seat (1) and the shell (3) which are welded into a whole;

A reset spring (16), a permanent magnet (5), a stop seat (6), a coil (8) wound on a framework (7), a magnetic conduction gasket (18) and an end cover (9) are sequentially arranged in the device;

the circuit board (11) and the circuit board housing (10) are mounted and the wiring connection is completed.