CN101672387A - Long-stroke electromagnetic head - Google Patents
Long-stroke electromagnetic head Download PDFInfo
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- CN101672387A CN101672387A CN200910235249.XA CN200910235249A CN101672387A CN 101672387 A CN101672387 A CN 101672387A CN 200910235249 A CN200910235249 A CN 200910235249A CN 101672387 A CN101672387 A CN 101672387A
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- iron core
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Abstract
The invention relates to a long-stroke electromagnetic head, which comprises an electromagnetic head body, a valve rod and a spring, wherein the electromagnetic head body is provided with a static iron core and a movable iron core; the spring preferably adopts a spiral spring; the lower part of the movable iron core is provided with a vertical hole; the upper part of the valve rod extends into thevertical hole; the spiral spring is sheathed at the upper part of the valve rod, the upper end thereof is connected with the valve, and the lower end thereof is connected with the movable iron core.After a coil is electrified, the spring is compressed when the movable iron core moves upward; when the movable iron core moves upward near the static iron core, the spring is compressed tightly, andthe suction suffered by the movable iron core can reach or approach the maximum value, so as to pull the valve rod upward; and then the spring can go on pulling the valve rod upward by overcoming theself gravity of the valve rod, so as to realize the full opening of a valve. The suction between the movable iron core and the static iron core is in accordance with the actual suction change situation between the movable iron core and the static iron core, thereby effectively reducing the power of the electromagnetic head, reducing the electricity consumption and facilitating the maintenance, therefore, the long-stroke electromagnetic head can be used for various electromagnetic valves and particularly for electromagnetic valves with heavy caliber and long stroke.
Description
Technical field
The present invention relates to a kind of particularly long-stroke electromagnetic head of heavy caliber, large-stroke electromagnetic valve of various solenoid valves that can be used for.
Background technique
Existing solenoid valve is typically provided with main valve sealing pair and secondary valve seal pair, Sealing in the described secondary valve seal pair is installed in the lower end of valve rod, driving valve rod by moving iron core moves up and down, realize the opening and closing of fault of secondary valve seal pair, and then control the opening and closing of main valve sealing pair by the break-make of secondary valve medium channel.For example No. 02208418.5 utility model patent of China discloses a kind of solenoid valve (referring to Fig. 5 and Fig. 6): described main valve sealing pair is arranged in the valve pocket of main valve body, be used to be communicated with or cut off main valve medium channel in the main valve body, valve cup and fixing main valve valve seat by activity are formed, the main valve valve seat is horizontal valve seat, the valve pocket that is positioned at its top connects the entrance point of valve, the valve pocket that is positioned at its underpart connects the outlet end of valve, described valve cup is positioned at the top of described main valve valve seat, be slidingly matched with the valve glass holder that is fixedly mounted in the valve body, can move up and down, the bottom of valve cup is provided with the sealed department (being used for contacting the sealing area that forms sealing with main valve valve seat appropriate section) that matches with the main valve valve seat.When valve closing, the valve cup moves down, and the sealed department on the valve cup contacts with sealed department on the main valve valve seat, cuts off the medium channel in the main valve body, realizes the sealing of main valve sealing pair, makes valve be in closed condition; The valve cup moves up during valve opening, and valve cup and main valve valve seat are separated from each other, and makes medium be passed the medium channel of main valve valve seat central authorities, to the flowing of valve export end, makes valve be in opening state by the valve inlet end thus.Described secondary valve seal pair is arranged in the valve pocket of auxiliary valve body, be used for being communicated with or cutting off secondary valve medium channel, and with the state of this control valve cup and main valve sealing pair, secondary valve seal pair is made up of secondary valve seal and secondary valve base 9, secondary valve base is divided into two-part with secondary valve valve pocket, the secondary valve valve pocket that wherein is positioned at described secondary valve base one side is communicated with the valve pocket that main valve body is communicated with the valve export end by the secondary valve medium channel of appropriate section, the secondary valve valve pocket of described secondary valve base opposite side is communicated with the main valve valve pocket at interior space of main valve body internal valve cup and valve cup place by the secondary valve medium channel of another part, the Sealing 6 of described secondary valve is connected the lower end of valve rod and is positioned at the top of described secondary valve base, the upper end connection of described valve rod is positioned at the intrinsic moving iron core 1 of Electrical heads, after coil 5 energisings in the Electrical heads body, static iron core 2 attracts each other with moving iron core, moving iron core moves up, driving valve rod and secondary valve seal moves up, make secondary valve seal break away from secondary valve base, the medium channel that medium is passed secondary valve base central authorities flows into the valve pocket that space in the valve cup and valve export end are communicated with, simultaneously, medium in the valve pocket that is communicated with entrance point in the main valve body flows into space in the valve cup by the damping hole that is arranged on valve cup lower sides or valve cup bottom, because the damping function of damping hole, the medium amount that flows into the valve cup is less than the medium amount that flows out the valve cup, cause the pressure medium in the valve cup to reduce, pressure medium in the valve pocket that the attenuating value of this pressure medium equals to be communicated with outlet end in the main valve body haply, and pressure medium around the valve cup and valve cup bottom are positioned at the pressure medium big (equating substantially with the pressure medium of valve inlet end) in the sealing surface outside of main valve sealing pair, the pressure difference that formation moves up the valve cup, promote the valve cup and move up, and then the primary seal pair is opened; After the Electrical heads outage, moving iron core and valve rod move down under the effect of Returnning spring and self gravitation, drive secondary valve seal sealing auxiliary-seat, cut off secondary valve medium channel, the medium that is flowed into the valve cup by damping hole is cumulative, cause the pressure medium in the valve cup to raise, simultaneously because the suction function that the MEDIA FLOW of valve cup bottom forms, finally make in the valve cup pressure medium that the valve cup is upwards pressed the valve cup greater than from valve cup bottom to the pressure medium that presses down and surface friction drag etc., the valve cup moves down, and the main valve valve seat is sealed.
No matter existing this class solenoid valve concrete structure is how, all there is following defective:
Because moving iron core directly drives the Sealing of secondary valve by valve rod, make the same moved further of secondary valve seal servo-actuated iron core, therefore required pulling force maximum when secondary valve seal pair just will have been opened, but the gap maximum between this moment sound iron core, actual pulling force (mutual attraction between the both dynamic and static iron core) minimum that produces; And required pulling force minimum behind the secondary complete opening of secondary valve seal, but the gap minimum between this moment sound iron core, the pulling force maximum that produces, therefore to make the solenoid valve can proper functioning when opening, just must adopt the bigger Electrical heads body of function, make its pulling force requirement of under the situation of pulling force output minimum, satisfying the solenoid valve maximum, not only improve the cost of Electrical heads body thus, but also increased the energy consumption and the volume of solenoid valve, and increased the difficulty of aspects such as cooling and maintenance.The bore of solenoid valve is big more, stroke is big more, and above-mentioned defective is just more for serious.
Be the brief analysis that this class solenoid valve is related to the working principle of suction and pulling force aspect below:
The size of working gas gap is inversely proportional between the size of moving the actual suction that produces between iron core and the static iron core and moving iron core and static iron core, be that working gas gap hour suction is big, suction was little when working gas gap was big, wherein the size of working gas gap is subjected to the restriction of auxiliary-seat, and the auxiliary-seat latus rectum is big more, and secondary opening of valves height is big more, then working gas gap is big more, the auxiliary-seat latus rectum is more little, and secondary opening of valves height is more little, and working gas gap is also more little.And on the other hand, the size of actual required suction is determined by secondary opening of valves resistance between moving iron core and the static iron core, the size of secondary opening of valves resistance depends on the size of auxiliary-seat latus rectum size, surface friction drag and pressure medium, behind secondary opening of valves, its surface friction drag and pressure medium reduce or reduce gradually, so its resistance also reduces gradually.A contradiction has just appearred thus: when secondary valve begins to open, and resistance and pulling force demand maximum, but the suction minimum between the sound iron core, when secondary valve complete opening, resistance and pulling force demand minimum, but the suction maximum between the sound iron core.Guarantee that between sound iron core suction hour overcomes maximum resistance, just must satisfy actual conditions by the big Electrical heads body of design power.
For only being provided with a sealing pair or other are provided with the solenoid valve of two or more sealing pairs, so long as its moving iron core drives the Sealing synchronization motion by valve rod, the capital exists same or similar problem, therefore also can adopt Electrical heads of the present invention to drive.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of long-stroke electromagnetic head, adopt the solenoid valve of this Electrical heads, the Changing Pattern of suction size meets the Changing Pattern of actual suction size between the sound iron core haply or basically between the required sound iron core in opening process, reduces unnecessary Electrical heads power and energy consumption thus.
For achieving the above object, the present invention adopts following technical proposal:
A kind of long-stroke electromagnetic head, comprise Electrical heads body, valve rod and spring, described Electrical heads body is provided with static iron core and moving iron core, and an end of described spring is connected with described valve rod, the other end of described spring is connected with described moving iron core, the preferred helical spring of described spring.
Working principle of the present invention and beneficial effect are:
Behind coil electricity, produce suction between the sound iron core, because at this moment the gap between the sound iron core is in maximum value, so the suction between the sound iron core is in minimum value.By suitable the elastic coefficient being set or selecting suitable spring, when being moved up, iron core spring can be stretched or compression (according to the Placement difference of spring), and to valve rod formation pulling force or thrust upwards, because at this moment as long as spring is stretched or compression, therefore required suction is less, guarantee under the motionless situation of valve rod (be between the sound iron core suction less than Sealing being mentioned required power), moving iron core can continue to move up, move in the continuation along with moving iron core, moving iron core is more and more littler with the gap between the static iron core, suction between the sound iron core is increasing, the stretching or the compression degree of spring are also increasing simultaneously, pulling force or thrust to valve rod are also just increasing, on moving iron core, move on to setting degree (near or reach minimum clearance between the sound iron core) time, the suffered suction of moving iron core arrives or near maximum value, spring also tightly is directly passed to valve rod or forms maximum elastic force so that will move the pulling force of iron core simultaneously, perhaps the pulling force of spring deformation generation or thrust foot are big, maximum resistance when overcoming valve opening is upwards mentioned valve rod, valve rod lower end attached seal breaks away from corresponding valve seat, realize the preliminary unlatching of valve thus, spring overcomes in the continuation such as valve rod self gravitation and draws valve rod then, realizes the complete opening of valve.
Because the present invention's suction minimum between (when coil has just begun to switch on) required sound iron core in the maximum of gap between the sound iron core, as long as can realize stretching or compression to spring, only at sound iron core gap (or hour) bigger suction of needs just hour, so that Sealing is mentioned, this requirement to the suction between the sound iron core meets the actual change situation of suction between the sound iron core basically, therefore can reduce the power of Electrical heads effectively, reduce the Electrical heads volume, reduce power consumption, and maintain easily.
Description of drawings
Fig. 1 is the structural representation under the present invention in off position;
Fig. 2 is the structural representation of the present invention under a step starting state;
Fig. 3 is the structural representation of the present invention under two step starting states;
Fig. 4 is the structural representation of the present invention under the complete opening state;
Fig. 5 is the respective electrical magnetic head structural representation under (working gas gap existence) in off position under the prior art;
Fig. 6 is the structural representation of respective electrical magnetic head under opening state (working gas gap vanishing state) under the prior art.
Embodiment
Referring to Fig. 1-4, the invention provides a kind of long-stroke electromagnetic head, comprise Electrical heads body, valve rod 3 and spring 4, described Electrical heads body is provided with static iron core 2 and moving iron core 1, one end of described spring is connected with described valve rod, and the other end of described spring is connected with described moving iron core.
Described Electrical heads body can adopt and arbitrarily existing or in the future presumablely iron core is moved up and down and be used to drive the electromagnetic actuator device that other parts move by the power on/off mode.For the facility of processing and using, the usually preferred helical spring of described spring.
Described helical spring can adopt the identical helical spring of elasticity coefficient everywhere, also can adopt the different helical spring of different parts elasticity coefficient (for example this helical spring pitch changes on axially or segmentation changes continuously at it), even the spring that can also adopt a plurality of (for example two) the to have different elasticity coefficient helical spring combination that is cascaded and forms.Under the different situation of each position elasticity coefficient, it is less that moving iron core begins power required when mobile, at this moment the less part of elasticity coefficient plays a major role in the spring, along with the continuation of moving iron core is moved, after the less spring section of elasticity coefficient is compressed to a certain degree, then the spring section that elasticity coefficient is bigger plays a major role, so that form bigger active force in the space that reduces, the force variation rule of this spring can be adapted to move past the situation of change of the moving suffered suction of iron core in the journey and/or relying on the situation of change that moves past suffered resistance in the journey in the continuation of spring band ovable valve stem on moving iron core better, more effectively reduces required power and actual power consumption.
The Placement of described helical spring and described valve rod and moving iron core can be: described helical spring is between described moving iron core and valve rod, and its upper end connects the lower end of described moving iron core, and the lower end connects the upper end of described valve rod.Described moving iron core and the part that described valve rod is connected with described helical spring all can be provided with the cylindricality joint of the described spring of axial insertion, to guarantee the stable of spring.Under this Placement, when moving iron core moves up, helical spring can be elongated, by helical spring deformation pulling force is passed to valve rod then, under the motionless situation of valve rod, the distance of moving on the moving iron core is big more, and it is long more that helical spring is stretched, and the pulling force that passes to valve rod is also just big more.
The Placement of described helical spring and described valve rod and moving iron core can also be: described moving mandrel lower is provided with vertical core, described valve rod top extends in the described vertical core, described helical spring is enclosed within described valve rod top, and its upper end is connected with described valve rod, and the lower end is connected with described moving iron core.This is a kind of preferred Placement (embodiment among Fig. 1-4 has all adopted this Placement), under this Placement, when moving iron core moves up, helical spring can be compressed, by helical spring deformation thrust is passed to valve rod then, under the motionless situation of valve rod, the distance of moving on the moving iron core is big more, helical spring is compressed short more, and the thrust that passes to valve rod is also just big more.
Described spring upper end can be that described valve rod top is provided with flange 7 with the Placement of described valve rod, described flange cylindrical and described vertical core Spielpassung, the upper end of described spring be positioned at described flange below, and fixedly connected with described flange or be in contact with one another.
Placement between described spring lower end and the described moving iron core can be that described vertical core bottom is provided with plug 8, described plug is fixedlyed connected with described moving iron core, described plug is provided with through hole, described valve rod pass on the described plug through hole and with described plug Spielpassung, described spring lower end be positioned at described plug above, and fixedly connected with described plug or be in contact with one another.
Described plug can be to be threaded with the Placement of described moving iron core, and the outside of described plug is provided with outside thread, and is connected on by this external thread rotary on the internal thread of described vertical core bottom, and described vertical core bottom is provided with the described internal thread that cooperates with this outside thread.
The main body of described valve rod is generally isometrical straight-bar, and its lower end is provided with the joint that is used to connect Sealing 6.
The selection of described spring should be according to job requirement of the present invention, and the characteristic of Electrical heads body (particularly suction between the sound iron core and suction Changing Pattern) adapts, promptly after coil 5 energisings, suction between the sound iron core can make on the continuing of spring stretching or compression and the moving iron core of assurance and move, on moving iron core, move on to the setting degree (near or when reaching sound iron core minimum clearance), can drive to move on the valve rod makes Sealing separate with secondary valve base 9, valve opening, under the situation that satisfies above-mentioned condition and corresponding design margin, should avoid excessive current drain or power.
What above-mentioned a plurality of paragragh related to is specializing different parts or different Placements, these technical characteristicss of specializing can carry out combination in any according to the technological scheme of this patent, form each technological scheme specialized that is subordinated to independent claims and the other technologies scheme that excludes claims.
In this specification alleged spring with comprise being connected of valve rod or moving iron core any suitable can generation effect between interconnective two parts Placement, make valve rod or moving iron core mobile be passed to the corresponding connecting end of spring and make this connecting end do moving or forming in the same way that vice versa to the corresponding power of this connecting end.For example, can be that two parts directly connect, also can be that link passes through the indirect connection that other keys are realized, can be to make the connection part of two parts relatively-stationary fixedly connected, also can be two parts be in contact with one another and in moving process transfer function power, even can also be under static state be not in contact with one another, part just contacts with another part and transfer function power after moving.
Can make (when coil begins to switch on) required suction minimum in the gap maximum of iron core between the sound iron core by the present invention, as long as can realize stretching or compression to spring, the sound iron core gap hour (or hour) then need bigger suction, so that Sealing is mentioned, select to guarantee under as far as possible little electric current or power, satisfying above-mentioned requirements by suitable selection of Electrical heads body and spring.This requirement to the suction between the sound iron core meets the actual change situation of suction between the sound iron core, therefore can reduce the power of Electrical heads effectively, reduces the Electrical heads volume, reduces power consumption, and maintains easily.
What Fig. 1-Fig. 4 had shown a kind of embodiment's working procedure: Fig. 1 demonstration is the state of valve closing, moving iron core and valve rod are under effects such as deadweight and spring, be in extreme lower position, valve rod lower end attached seal is sealed corresponding valve seat, in the moment that coil has just been switched on, valve still remains on this state, therefore also can be regarded as the initial state in the valve opening process; Fig. 2 is behind coil electricity, move on the moving iron core make length of spring compressed to and tight state, at this moment moving iron core near or reach the position of sound interferric space minimum, can form is enough to power that valve rod is mentioned, but valve rod is not mentioned (momentary status) as yet; Fig. 3 moves up through moving iron core behind the state shown in Figure 2, and valve rod is mentioned a very little distance, and the through hole that medium is able to from the valve seat flows through, and mentions in the process at this, and spring also is in and tight state basically; What Fig. 4 showed is to move to the extreme higher position on the effect lower valve rod of spring force carries out, and makes sealing pair be in the complete opening state, and spring is returned to normality simultaneously.
Claims (10)
1, a kind of long-stroke electromagnetic head comprises Electrical heads body and valve rod, and described Electrical heads body is provided with static iron core and moving iron core, it is characterized in that also comprising spring, and an end of described spring is connected with described valve rod, and the other end is connected with described moving iron core.
2, long-stroke electromagnetic head as claimed in claim 1 is characterized in that described spring is a helical spring.
3, long-stroke electromagnetic head as claimed in claim 2 is characterized in that described helical spring adopts the helical spring that elasticity coefficient is identical everywhere or adopts the different helical spring of different parts elasticity coefficient.
4, long-stroke electromagnetic head as claimed in claim 3, it is characterized in that the different helical spring of described different parts elasticity coefficient is the helical spring that pitch changes in the axial direction continuously or segmentation changes, the perhaps helical spring combination that is cascaded and forms for a plurality of helical springs with different elasticity coefficient.
5, as claim 2,3 or 4 described long-stroke electromagnetic heads, the Placement that it is characterized in that described helical spring and described valve rod and described moving iron core is: described helical spring is between described moving iron core and described valve rod, its upper end connects the lower end of described moving iron core, and the lower end connects the upper end of described valve rod.
6, long-stroke electromagnetic head as claimed in claim 5 is characterized in that part that described moving iron core and described valve rod are connected with described helical spring is equipped with the cylindricality joint of the described spring of axial insertion.
7, as claim 2,3 or 4 described long-stroke electromagnetic heads, the Placement that it is characterized in that described helical spring and described valve rod and described moving iron core is: described moving mandrel lower is provided with vertical core, the top of described valve rod extend in the described vertical core and with described vertical core Spielpassung, described helical spring is enclosed within the top of described valve rod, its upper end is connected with described valve rod, and the lower end is connected with described moving iron core.
8, long-stroke electromagnetic head as claimed in claim 7, it is characterized in that the described spring upper end and the Placement of described valve rod are that described valve rod top is provided with flange, described flange cylindrical and described vertical core Spielpassung, the upper end of described spring are positioned at the following of described flange and fixedly connected with described flange or be in contact with one another.
9, long-stroke electromagnetic head as claimed in claim 8, it is characterized in that the Placement between described spring lower end and the described moving iron core is that described vertical core bottom is provided with plug, described plug is fixedlyed connected with described moving iron core, described plug is provided with through hole, described valve rod pass on the described plug through hole and with described plug Spielpassung, described spring lower end is positioned at the top of described plug and fixedlys connected with described plug or be in contact with one another.
10, long-stroke electromagnetic head as claimed in claim 9 is characterized in that described plug is to be threaded with the Placement of described moving iron core, and the outside of described plug is provided with outside thread, and the bottom of described vertical core is provided with the internal thread that cooperates with this outside thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910235249.XA CN101672387B (en) | 2009-09-30 | 2009-09-30 | Long-stroke electromagnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910235249.XA CN101672387B (en) | 2009-09-30 | 2009-09-30 | Long-stroke electromagnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101672387A true CN101672387A (en) | 2010-03-17 |
| CN101672387B CN101672387B (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910235249.XA Expired - Fee Related CN101672387B (en) | 2009-09-30 | 2009-09-30 | Long-stroke electromagnetic head |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846063A (en) * | 2010-05-18 | 2010-09-29 | 宁波布拉沃冲气具制造有限公司 | Pressure regulator of electric air pump |
| CN108880146A (en) * | 2018-08-10 | 2018-11-23 | 山东中际智能装备有限公司 | A kind of safe quick-changing mechanism of charging ram |
| CN109844386A (en) * | 2016-10-13 | 2019-06-04 | 罗伯特·博世有限公司 | Solenoid valve and brake fluid system for vehicle |
| CN115596881A (en) * | 2022-12-15 | 2023-01-13 | 博鼎精工智能科技（山东）有限公司（Cn） | Poppet valve with air-break protection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4120317A (en) * | 1973-05-11 | 1978-10-17 | U.S. Philips Corporation | Anti-lock vehicle brake systems |
-
2009
- 2009-09-30 CN CN200910235249.XA patent/CN101672387B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846063A (en) * | 2010-05-18 | 2010-09-29 | 宁波布拉沃冲气具制造有限公司 | Pressure regulator of electric air pump |
| CN101846063B (en) * | 2010-05-18 | 2013-04-24 | 宁波布拉沃冲气具制造有限公司 | Pressure regulator of electric air pump |
| CN109844386A (en) * | 2016-10-13 | 2019-06-04 | 罗伯特·博世有限公司 | Solenoid valve and brake fluid system for vehicle |
| CN109844386B (en) * | 2016-10-13 | 2021-06-04 | 罗伯特·博世有限公司 | Solenoid valve and hydraulic brake system for vehicle |
| CN108880146A (en) * | 2018-08-10 | 2018-11-23 | 山东中际智能装备有限公司 | A kind of safe quick-changing mechanism of charging ram |
| CN115596881A (en) * | 2022-12-15 | 2023-01-13 | 博鼎精工智能科技（山东）有限公司（Cn） | Poppet valve with air-break protection device |
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| Publication number | Publication date |
|---|---|
| CN101672387B (en) | 2013-07-17 |
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Granted publication date: 20130717 Termination date: 20210930 |