KR101011642B1 - Variable force solenoid valve - Google Patents

Abstract

PURPOSE: A proportionally-controlled solenoid valve is provided to enable the reciprocating motion of a plunger to be effectively controlled since a spring guide for limiting unidirectional motion of the plunger is installed in a spring. CONSTITUTION: A proportionally-controlled solenoid valve comprises a core(220), a hollow yoke(230), a plunger(120), a spring(130) and a spring guide(140). The core comprises a first recess and a second recess. The yoke is spaced from the core. The plunger is installed in the yoke, is inserted into the first recess and reciprocates. The spring is inserted into the second recess and applies tensile force to the plunger. The spring guide is inserted into the spring and limits the operation of the plunger. The first recess comprises a first corner, a second corner, a third corner and a fourth corner.

Description

Proportional Control Solenoid Valve {VARIABLE FORCE SOLENOID VALVE}

The present invention relates to a proportional control solenoid valve, and more particularly to a proportional control solenoid valve comprising a spring guide for limiting the operation of the plunger in a spring for returning the plunger.

The solenoid valve is an automatic valve composed of a solenoid portion having a magnetic core and one or more orifices to control the flow of fluid by electric current. Such solenoid valves generally include a bobbin coiled to generate magnetic force, a holder formed with a core, a yoke spaced from the core, a plunger interpolated in the yoke, and a fluid movement passage interrupted by the above-described structure.

In the conventional solenoid valve having such a structure, the plunger is inserted into the hollow portion of the yoke to reciprocate. However, conventionally, the plunger inserted into the hollow portion of the yoke is in direct contact with the yoke, so that the plunger and the yoke have a large sliding resistance.

In addition, although the guide is provided on the outer surface of the yoke and the core, a gap may occur, which causes a problem in that the airtightness of the solenoid valve is unreliable. Moreover, the conventional solenoid valve structure does not satisfy the flow control diagram, and there is a problem that the plunger may be corroded.

An object of the present invention is to provide a proportional control solenoid valve which minimizes the sliding resistance of the plunger and the yoke and can effectively perform the proportional control.

Another object of the present invention is to provide a proportional control solenoid valve that can effectively control the reciprocating motion of the plunger and satisfy the flow control diagram.

In addition, another object of the present invention is to provide a proportional control solenoid valve capable of improving airtightness and preventing internal corrosion.

In order to achieve the above object, the present invention provides a core having first and second recesses, a hollow yoke spaced apart from the core, and a reciprocating motion inserted into the second recess and provided in the yoke. A plunger, a spring inserted into the first recess to apply a tension force to the plunger, and a spring guide inserted into the spring to limit the operation of the plunger, the proportional control solenoid valve is provided. The core extends from parallel first and fourth core edge faces, a second core edge face extending from the first core edge face, and from the second core edge face and the fourth core edge face. And a third core edge face, wherein the second core edge face and the fourth core edge face decrease in width toward the third core edge face, and the third core edge face comprises: the first core edge face; A core edge perpendicular to the fourth core edge face is formed in the plunger direction. The plunger may have one or more grooves formed on an outer surface thereof, and a plunger side seal may be formed in the groove. In addition, the plunger is spaced apart from the yoke, and the plunger side seal may be in contact with the yoke to minimize sliding resistance. To this end the plunger side seal may comprise Teflon. The plunger may include a stainless material. A bobbin positioned on an outer surface of the core and the yoke, and a coil wound around the core, a guide positioned between the core and the yoke and the bobbin and bonded to the core by laser welding. The proportional control solenoid valve includes a holder in which a fluid inlet passage and a fluid outlet passage are formed, and the plunger includes an inhaler which intercepts either the fluid inlet passage or the fluid outlet passage. The inhaler includes a body, a second protrusion formed on one surface of the body and inserted into the plunger, and a first protrusion formed on the other surface of the body to control any one of the fluid inflow passage and the fluid discharge passage. do. However, the present invention is not limited thereto, and the inhaler may include a ring-shaped suction ring and a cone-shaped suction cone inserted into the suction ring. At this time, the suction ring includes a fluorine rubber, the suction cone preferably comprises stainless steel. The first protrusion has a cone shape including a first surface and a second surface in contact with each other, a third surface extending from the first surface and in contact with the body, and a fourth surface extending from the second surface and in contact with the body. The first surface and the second surface forms an angle of 48 degrees, and the third surface forms an angle of 12 degrees with a direction in which the body moves. Preferably, the first protrusion has a diameter of 3.4 mm or less, and the third and fourth surfaces have a length of 0.3 mm.

The present invention can provide a proportional control solenoid valve having a spring guide for limiting one-way movement of the plunger during the reciprocating motion of the plunger in the spring to effectively control the reciprocating motion of the plunger.

In addition, the present invention can provide a proportional control solenoid valve that can effectively perform the proportional control by reducing the width of the core edge.

In addition, the present invention can provide a proportional control solenoid valve having a cone-shaped inhaler for intermittent fluid inside the holder to satisfy the flow control diagram.

In addition, the present invention can provide a proportional control solenoid valve that can improve the airtightness by laser welding the core and the guide.

In addition, the present invention can provide a proportional control solenoid valve having a plunger slide seal of Teflon on the outer surface of the plunger to minimize the sliding resistance of the plunger and the yoke.

In addition, the present invention can provide a proportional control solenoid valve that can prevent the internal corrosion by making the plunger of a stainless-based material.

1 is a perspective view of a proportional control solenoid valve according to the present invention.
2 is a schematic cross-sectional view taken on the line A-A 'of FIG.
3 is an enlarged cross-sectional view of region B of FIG. 2;
4 is a schematic cross-sectional view of a proportional control solenoid valve according to another embodiment of the present invention.
Figure 5 is a characteristic graph according to the intake (CON) area (diameter) of the proportional control solenoid valve according to the present invention.
6 is a Maxwell data sheet graph of a proportional control solenoid valve according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Like reference numerals refer to like elements throughout.

1 is a perspective view of a proportional control solenoid valve according to the present invention, and FIG. 2 is a schematic cross-sectional view taken on line A-A 'of FIG. 3 is an enlarged cross-sectional view of region B of FIG. 2, and FIG. 4 is a schematic cross-sectional view of a proportional control solenoid valve according to another exemplary embodiment of the present invention. 5 is a characteristic graph according to the area (diameter) of the inhaler CON of the proportional control solenoid valve according to the present invention, and FIG. 6 is a Maxwell data sheet graph of the proportional control solenoid valve according to the present invention.

As illustrated in FIGS. 1 and 2, the proportional control solenoid valve according to the present invention includes a valve unit 100 and a solenoid unit 200 for driving the valve unit 100.

The valve unit 100 is mounted on the valve body having a plurality of flow paths so as to be supplied to the clutch (not shown) while applying a predetermined control pressure to a fluid supplied from an external hydraulic supply source. ), A plunger 120 to clamp down the hollow of the holder 110, an inhaler 150 provided below the plunger 120, a spring 130 provided above the plunger 120, and a spring ( It includes a spring guide 140 provided inside the 130.

The holder 110 includes a fluid passage opened in the longitudinal direction, and the fluid passage includes a fluid inflow passage through which fluid is introduced and a fluid discharge passage through which the introduced fluid is intermittently discharged by the inhaler 150.

The fluid inflow passage opens one side of the holder 110 and extends in the longitudinal direction of the holder 110. In addition, the fluid inflow passage is formed to extend to the center of the holder 110, is bent at the center of the holder 110 is opened to the side wall. This fluid inlet passage is interrupted by the inhaler 150.

The fluid discharge passage opens the other side of the holder 110 and extends in the longitudinal direction of the holder 110. In addition, the fluid discharge passage is also formed to extend to the center of the holder 110, the fluid inlet passage is bent in the bent direction in the center of the holder 110 is opened to the side wall. Of course, the fluid discharge passage is spaced apart from the fluid inflow passage and the separation wall at the center of the holder 110, it may be interrupted by the inhaler 150 instead of the fluid inflow passage. The holder 110 having such a structure is fastened to the guide 240 with the first ohmic ring 160 therebetween.

The plunger 120 is disposed between the core 220 and the yoke 230 and moves toward the core 220 by a magnetic field generated when power is applied to the coil 214. In this case, a first recessed portion in which magnetic force is concentrated is formed in the core 220 adjacent to the plunger 120, and one end of the plunger 120 is partially accommodated in the first recessed portion. In addition, the plunger 120 is a groove is formed in the longitudinal direction, by this groove allows the fluid between the holder 110 and the plunger 120 to move.

In the present invention, the plunger 120 is made of a stainless material to prevent internal corrosion. In addition, at least one annular groove is formed on the outer surface of the plunger 120 in a direction crossing the length direction of the plunger 120, and the plunger slide seal 122 is formed in the annular groove.

The plunger slide seal 122 is for minimizing sliding resistance of the plunger 120 and the yoke 230, and is formed in the annular groove of the plunger 120, but the plunger 120 and the yoke 230 do not directly contact each other. It is formed to protrude from the side of the 120. The plunger slide seal 122 is formed of Teflon, that is, polytetrafluoroethylene (PTFE), which is effective to minimize the sliding resistance of the plunger 120 and the yoke 230.

As shown in FIG. 3, an inhaler 150 regulates the fluid inflow passage to control the flow of fluid from the fluid inflow passage to the fluid discharge passage. The inhaler 150 has a flat body which may be circular, oval or polygonal based on a plan view, a first protrusion protruding from the bottom of the body, and a second protrusion protruding from the top of the body and inserted into the plunger 120. Include. In addition, the present embodiment may use fluorine rubber as the inhaler 150.

However, the present invention is not limited thereto, and the inhaler 150 may be formed as shown in FIG. 4. That is, the inhaler 150 of the present invention may include a ring-shaped suction ring 152 and a cone-shaped suction cone 154 inserted into the suction ring. In this case, the suction ring 152 may be formed of fluorine rubber, and the suction cone 154 may be formed of stainless steel such as SUS303. As such, when the inhaler 150 is configured of the suction ring 152 which is fluorine rubber and the suction cone 154 which is stainless steel, the suction cone 154 is forcibly pressed into the plunger 120 to prevent deformation due to the supply pressure. Can be.

The first protrusion protrudes on one side of the body to control the fluid inflow passage. The first protrusion protrudes in a horn shape and is inserted into the fluid inflow passage. For this purpose, the diameter of the first protrusion is preferably smaller than the diameter of the fluid inflow passage in contact with the first protrusion. In this embodiment, the first protrusion includes three surfaces based on the plan view, and includes first to fourth surfaces based on the cross-sectional view. Referring to FIG. 3, the first angle of the first protrusion forms an angle of 12 degrees based on a line perpendicular to the general x-axis direction from the center of the inhaler 150, and the second angle forms an angle of 60 degrees. As a result, the first and second surfaces form an angle of 156 degrees. The third side and the fourth side have a length of 0.3 mm.

The proportional control solenoid valve according to the present embodiment has a diameter of 3.3 mm at the distal end of the fluid inflow passage interrupted by the inhaler 150, and actually has a diameter of 3.4 mm including a tolerance. In addition, the diameter of the first protrusion of the inhaler 150 also has a value of less than 3.4 mm. On the other hand, the present embodiment has illustrated that the first protrusion is made of the first to the fourth surface, that is, four sides on the basis of the cross-sectional view, but is not limited to this, the first protrusion is formed of two surfaces are horn-shaped It may be.

According to the present invention, as shown in FIG. 5, the most ideal stroke can be obtained when the end diameter of the fluid inlet passage that is in contact with the inhaler 150 is 3.3 mm (3.4 mm when including a tolerance). It can be seen that.

The spring 130 provides an elastic force in the downward direction of the plunger 120 and at the same time buffers the plunger 120 when the plunger 120 moves up and down. The spring 130 is inserted into and fixed to the second recessed portion of the core 220.

The spring guide 140 is for limiting the upper motion during the vertical reciprocation of the plunger 120, is inserted into the spring 130 is fixed to the core 220. The spring guide 140 is spaced apart from the spring 130 by a predetermined interval so as not to affect the elasticity of the spring 130, it is preferable that the spring shape is a column shape that decreases toward the bottom.

The solenoid portion 200 is for operating the valve portion 100, the bobbin 212 wound around the coil 214 to move up and down the plunger 120 of the valve portion 100, and the outer peripheral surface of the bobbin 212 The case 250 enclosing the core, the core 220 disposed at one end of the plunger 120, and the yoke having a hollow shape are disposed at one end of the plunger 120 to allow the plunger 120 to move up and down inside thereof. 230, and a guide 240 provided between the core 220 and the yoke 230 and the bobbin 212. Also, a bolt piercing through the terminal 290 for applying a current to the coil 214, the C-shaped ring 270 provided between the core 220 and the case 250, and the bobbin assay 216. 280, and a frame cover provided between the bobbin assay 216 and the bobbin 212, and a second misalignment ring 272 provided to form an annular groove on the outer surface of the core 220 to contact the guide 240. 260.

The bobbin 212 has a hollow cylindrical shape, and a coil 214 is wound around its outer circumferential surface. A portion of the bobbin 212 is accommodated so that the core 220 and the yoke 230 are spaced apart from each other by a predetermined interval. In addition, the plunger 120 is accommodated in the yoke 230.

The core 220 is formed with a first recess portion in which magnetic force is concentrated in a portion adjacent to the plunger 120, and one end of the plunger 120 is partially accommodated in the first recess portion. In addition, a second recess portion having a smaller diameter than the first recess portion is formed at an upper end of the first recess portion, and the spring 130 and the spring guide 140 are accommodated in the second recess portion as described above. In this case, the first recessed portion of the core 220 may have parallel first and fourth core edge faces, a second core edge face extending from the first core edge face, and the second core edge face. And a third core edge face extending from the fourth core edge face, wherein the second core edge face and the fourth core edge face decrease in width toward the third core edge face, and the third core edge face. The surface of the core core perpendicular to the first core edge surface and the fourth core edge surface is formed in the plunger 120 direction.

The yoke 230 is inserted therein to allow the plunger 120 to move up and down. At this time, the yoke 230 is a hollow tubular shape, the end is bent to be coupled to the holder (110). The yoke 230 is spaced apart from the core 220 by a predetermined interval, and finely spaced apart from the interleaved plunger 120. In addition, the plunger 120 is spaced apart from the plunger slide seal 122 formed in the plunger 120.

The guide 240 is for improving the airtightness between the core 220 and the yoke 230, and is provided between the core 220 and the yoke 230 and the bobbin 212, and an end thereof is coupled to the holder 110. do. At this time, the guide 240 is laser-welded with the core 220 to maximize the airtightness. The guide 240 is formed in a tubular shape similar to the yoke 230, the end of which is bent to engage the holder 110.

In addition, the relationship between the stroke and the force of the proportional control solenoid valve according to the present invention is as shown in FIG.

As described above, the present invention includes a spring guide 140 for limiting one-way movement of the plunger 120 during the reciprocating motion of the plunger 120 in the spring 130 to effectively control the reciprocating motion of the plunger 120. Proportional control solenoid valve can be provided. In addition, the present invention may provide a proportional control solenoid valve capable of effectively performing proportional control by reducing the width of the edge of the core 220. In addition, the present invention can provide a proportional control solenoid valve having a cone-shaped inhaler 150 for intermittent fluid inside the holder 110 to satisfy the flow control diagram. In addition, the present invention can provide a proportional control solenoid valve that can improve the airtightness by laser welding the core 220 and the guide 240. In addition, the present invention may provide a proportional control solenoid valve having a plunger slide seal 122 which is Teflon on the outer surface of the plunger 120 to minimize sliding resistance between the plunger 120 and the yoke 230. In addition, the present invention can provide a proportional control solenoid valve that can prevent the internal corrosion by making the plunger 120 of a stainless-based material.

Although described above with reference to the drawings and embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit of the invention described in the claims below. I can understand.

100: valve portion 110: holder
120: plunger 122: plunger slide seal
130: spring 140: spring guide
150: inhaler 160: first misalignment ring
200: solenoid part 212: bobbin
214: coil 220: core
230: York 240: guide
250: case 260: frame cover
270: type C ring 272: second mistyped ring
280: bolt 290: terminal

Claims (15)

A core in which the first and second recesses are formed;
A hollow yoke spaced apart from the core,
A plunger provided in the yoke and inserted and reciprocated in the first recess;
A spring inserted into the second recess to apply a tensile force to the plunger;
A spring guide inserted into the spring to limit the operation of the plunger,
The first recessed portion has a first core edge face, a fourth core edge face parallel to the first core edge face, and in contact with a side surface of the plunger, and the fourth core edge face at the first core edge face. And a third core edge face which is bent and extends, and a third core edge face which connects the second core edge face and the fourth core edge face to each other. delete The method according to claim 1,
The plunger is formed with one or more grooves on the outer surface,
Proportional control solenoid valve, characterized in that the groove is formed with a plunger side seal. The method according to claim 3,
The plunger is spaced apart from the yoke,
And the plunger side seal is in contact with the yoke. The method according to claim 3,
The proportional solenoid valve of claim 1, wherein the plunger side seal comprises a teflon. The method according to claim 1,
The plunger is a proportional control solenoid valve, characterized in that it comprises a stainless material. The method according to claim 1,
A bobbin positioned on an outer surface of the core and the yoke and wound with a coil;
And a guide positioned between the core and the yoke and the bobbin and joined to the core by laser welding. The method according to claim 1,
The proportional control solenoid valve includes a holder having a fluid inlet passage and a fluid outlet passage,
And the plunger includes an inhaler intermittent in either the fluid inlet passage or the fluid outlet passage. The method according to claim 8,
The inhaler and the body,
A second protrusion formed on one surface of the body and inserted into the plunger;
And a first protruding portion formed on the other surface of the body to control any one of the fluid inflow passage and the fluid discharge passage. The method according to claim 8,
The inhaler and the ring-shaped suction ring,
Proportional control solenoid valve comprising a cone-shaped suction cone inserted into the suction ring. The method according to claim 10,
The suction ring includes fluorine rubber,
The suction cone is proportional control solenoid valve characterized in that it comprises a stainless steel. The method according to claim 9,
The first protrusion has a cone shape including a first surface and a second surface in contact with each other, a third surface extending from the first surface and in contact with the body, and a fourth surface extending from the second surface and in contact with the body. Proportional control solenoid valve, characterized in that. The method of claim 12,
The first surface and the second surface form an angle of 156 degrees,
And the third surface forms an angle of 12 degrees with a direction in which the body moves. The method according to claim 13,
Proportional control solenoid valve, characterized in that the first protrusion is less than 3.4mm in diameter. The method according to claim 13,
The third and fourth surfaces are proportional control solenoid valve, characterized in that having a length of 0.3mm.

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