WO2020024921A1 - 电磁驱动装置及具有该电磁驱动装置的燃气比例阀 - Google Patents

电磁驱动装置及具有该电磁驱动装置的燃气比例阀 Download PDF

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Publication number
WO2020024921A1
WO2020024921A1 PCT/CN2019/098298 CN2019098298W WO2020024921A1 WO 2020024921 A1 WO2020024921 A1 WO 2020024921A1 CN 2019098298 W CN2019098298 W CN 2019098298W WO 2020024921 A1 WO2020024921 A1 WO 2020024921A1
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WO
WIPO (PCT)
Prior art keywords
magnet
electromagnetic drive
permanent magnet
wall portion
magnetically permeable
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Application number
PCT/CN2019/098298
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English (en)
French (fr)
Inventor
王喜忠
Original Assignee
浙江三花智能控制股份有限公司
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Publication of WO2020024921A1 publication Critical patent/WO2020024921A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/126—Supporting or mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding

Definitions

  • the invention relates to the technical field of electromagnetic drive control and gas control, in particular to an electromagnetic drive device and a gas proportional valve using the electromagnetic drive device.
  • the electromagnetic driving device includes a permanent magnet, a magnet core and a coil component.
  • the magnetic field generated by the electromagnetic coil is interacted with the magnetic field generated by the permanent magnet, so that the valve component is driven by the coil component to reciprocate.
  • the coil component obtains a larger magnetic force, .
  • the more conducive to control the actuation accuracy of the valve plug, and the electromagnetic drive device often has a magnetic leakage phenomenon, thereby affecting the electromagnetic force obtained by the moving coil component. Therefore, how to improve the magnetic leakage phenomenon of the electromagnetic driving device is a technical problem to be solved by those skilled in the art.
  • the main object of the present invention is to provide an electromagnetic driving device and a gas proportional valve having the electromagnetic driving device.
  • the structure of the electromagnetic driving device can improve the magnetic leakage phenomenon.
  • the invention provides an electromagnetic driving device, which is provided with a cavity.
  • the electromagnetic driving device includes a housing and a magnetic conductor core.
  • the housing includes at least a magnetic conductive portion.
  • the magnetic conductive portion includes a top wall portion and a side wall portion.
  • the cores are fixedly connected.
  • the outer periphery of the magnetizing core is provided with a moving coil component.
  • the moving coil component can reciprocate along the axis direction of the magnetizing core.
  • the electromagnetic driving device further includes a permanent magnet and a magnetizing magnet, and the permanent magnet and the magnetizing magnet are located in the cavity.
  • the permanent magnet is sleeved on the outer peripheral portion of the magnet guide.
  • the permanent magnet is located between the side wall portion and the magnet guide.
  • the top wall portion does not directly contact the magnet guide.
  • the invention also provides a gas proportional valve including a main valve seat.
  • the main valve seat is provided with an inlet and an outlet.
  • the main valve seat is fixedly connected with a first electromagnetic driving component, a second electromagnetic driving component, and an electromagnetic driving device.
  • the cavity is also provided with a pressure difference adjustment device, the first electromagnetic drive component and the second electromagnetic drive component dominate the safety switching function of the gas proportional valve, and the electromagnetic drive device and the pressure difference adjustment device dominate the gas flow adjustment function.
  • the electromagnetic driving device provided by the present invention includes a housing and a magnetic core.
  • the housing includes at least a magnetic conductive portion.
  • the magnetic conductive portion includes a top wall portion and a side wall portion.
  • the top wall portion is fixedly connected to the magnetic core.
  • the electromagnetic driving device further includes a permanent magnet core.
  • the magnet and the magnet guide, the electromagnetic driving device is provided with a cavity.
  • the permanent magnet and the magnet guide are located in the cavity.
  • the permanent magnet is sleeved on the outer peripheral portion of the magnet guide.
  • the top wall portion does not directly contact the magnet guide.
  • the magnet can provide a magnetic force transmission effect for the permanent magnet, and the permanent magnet and the magnet guide are located in the cavity, which can relatively reduce the magnetic leakage and improve the magnetic leakage phenomenon.
  • FIG. 1 is a cross-sectional view of an electromagnetic drive device (without a valve plug) provided by the present invention
  • FIG 2 is an overall sectional view of an electromagnetic driving device provided by the present invention.
  • FIG. 3 is a cross-sectional view of a gas proportional valve having an electromagnetic driving device having the electromagnetic driving device provided by the present invention
  • FIG. 4 is a sectional view of a magnetic pole structure of a permanent magnet of an electromagnetic driving device provided by the present invention.
  • the electromagnetic driving device 4 a includes a housing 40 and a magnetic conductor core 44.
  • the housing 40 includes at least a magnetic conductive portion, and the magnetic conductive portion includes a top wall portion. 401 and the side wall portion 402.
  • the top wall portion 401 is fixedly connected to the magnet core 44.
  • the outer periphery of the magnet core 44 is provided with a moving coil component 43.
  • the moving coil component 43 can reciprocate along the axial direction of the magnetic core 44
  • the electromagnetic driving device 4a is provided with a cavity 48.
  • the electromagnetic driving device 4a further includes a permanent magnet 41 and a magnet 42. The permanent magnet 41 and the magnet 42 are located in the cavity 48.
  • the permanent magnet 41 and the magnet 42 are located in the moving coil assembly 43.
  • the outer shell 40 covers the permanent magnet 41 and the magnet guide 42.
  • the permanent magnet 41 is sleeved on the outer periphery of the magnet guide 42.
  • the permanent magnet 41 is located between the side wall portion 402 and the magnet guide 42 and the top wall portion 401. It is not in direct contact with the magnet guide 42.
  • the housing 40 generally forms a cavity 48 of the motor 4a through fixed connection with the magnetically permeable core 44 and the cover plate 47.
  • the housing at least includes a magnetically permeable portion. It should be noted that the magnetically permeable portion herein refers to a magnetically permeable portion.
  • the casing 40 may only include a magnetically conductive portion, that is, the entirety of the casing 40 may be stamped and formed from a magnetically permeable metal plate.
  • the casing 40 may also be made of low carbon steel or other magnetically permeable materials, or the magnetically permeable portion may be used as an insert. Pieces and plastic parts or other materials are injection-molded into the casing 40, and it is only necessary to ensure that the casing 40 has magnetic permeability.
  • the casing 40 is generally a cylindrical structure, and the magnetic core 44 is made of pure iron or low-carbon steel magnetic material. It is processed, and the top wall portion 401 of the housing 40 and the magnet core 44 can be fixedly connected by welding or riveting.
  • the electromagnetic driving device 4a includes a moving coil assembly 43.
  • the moving coil assembly 43 includes an excitation wire group 431 and a wire frame 432.
  • the excitation line group 431 is fixedly connected to the wire frame 432.
  • the permanent magnet 41 and the magnet guide 42 are located in the cavity 48 and the permanent magnet 41 and the magnet guide 42 are located on the outer periphery of the moving coil assembly 43.
  • the outer shell 40 roughly connects the permanent magnet 41 and the magnet guide.
  • the body 42 is covered.
  • the permanent magnet 41 may be a generally hollow ring structure as a whole.
  • the permanent magnet 41 may be an integrated ring structure or a split ring structure.
  • the permanent magnet 41 is provided with an inner ring surface and an outer ring. Surface, the permanent magnet 41 further includes an outer diameter magnetic pole portion 411 and an inner diameter magnetic pole portion 412.
  • the outer diameter magnetic pole portion 411 is relatively close to the outer ring surface.
  • the inner diameter magnetic pole portion 412 is relatively close to the outer ring surface.
  • the outer ring surface of the permanent magnet 41 is surrounded, and the magnet guide 42 substantially surrounds the inner ring surface of the permanent magnet 41.
  • the outer diameter magnetic pole portion 411 is attached to the side wall portion 402, and the inner diameter magnetic pole portion 412 and the outer wall of the magnet guide 42 are in phase.
  • Lamination it should be noted that the lamination here means that the two can offset each other or leave a certain gap, as long as the permanent magnet 41 does not fall, as shown in FIG.
  • the housing 40 includes a top wall portion 401 and a side wall portion 402.
  • the top wall portion 401 is fixedly connected to the magnet core 44.
  • the side wall portion 402 substantially surrounds an outer peripheral portion of the permanent magnet 41, and the permanent magnet 41 is located on the side wall portion 402.
  • a first gap L1 is formed between the top wall portion 401 and the upper end portion of the magnet guide 42 and the magnet guide 42, and a second gap L2 is formed between the magnet guide 42 and the side wall of the magnet core 44.
  • a second gap L2 is formed between the magnet guide boss of the magnet guide 42 and the side wall of the magnet guide core 44.
  • the top wall portion 401 and the side wall portion 402 are connected by a step portion, and the step And the upper end surface of the permanent magnet 41 abut, the stepped portion may be eliminated in the specific implementation, and the top wall portion 401 and the side wall portion 402 are directly connected so that the top wall portion 401 is formed at a certain distance from the upper end portion of the permanent magnet 41
  • the top wall portion 401 of the housing 40 is not in direct contact with the magnet guide 42 and a first distance L1 is formed. If the top wall portion 401 is in direct contact with the magnet guide 42, the closer the distance is, the easier it is to converge.
  • the outer diameter of the magnetic pole portion N pole is transmitted to the top wall portion 401 through the side wall portion 402 and straight.
  • the S-pole magnetic circuit back to the conducting magnet 42 is directly turned on, and will not be able to gather more magnetic force at the second distance L2, so the moving coil assembly 43 will not be able to obtain sufficient magnetic thrust to perform the normal axial movement of the moving coil assembly.
  • the field line group 431 of 43 is located between the magnet guide boss and the magnet core 44.
  • the first distance L1 is greater than the second distance L2, which is advantageous for the permanent magnet 41 to transmit the magnetic force at a short distance.
  • the magnetic force can be concentrated on the magnetic conductor 42 when the magnetic force is transmitted.
  • the magnetically permeable boss of the magnetic field finally concentrates the magnetic force more on the second interval L2.
  • the axial magnetic field generated by the moving coil assembly 43 in the current-carrying state is generated between the axial magnetic field generated by the second interval L2 and the radial magnetic field relative to the axial magnetic field. Due to the mutual repulsive force or traction force, because the magnetic force is relatively concentrated on the second distance L2, the excitation component 431 can sense enough magnetic force to drive the moving coil component 43 as a whole to reciprocate along the axis direction of the magnet core 44 because of the first distance L1 is larger than the second distance L2. According to the principle that the closer the distance is, the easier it is to collect magnetism.
  • the outer diameter magnetic pole portion 411 is transmitted from the side wall portion 402 of the casing 40 to the guide magnet through the step portion and the top wall portion 401. 44. Because the first distance L1 is larger than the second distance L2, the magnetic force is more likely to gather in the direction of the second distance L2. Similarly, during the magnetic force transmission process, the inner diameter magnetic pole portion 412 concentrates the magnetic force on the magnet guide boss. The distance L1 is larger than the second distance L2. The magnetic leakage in the direction of the first distance L1 is reduced, that is, the magnetic loss is relatively reduced. That is, the magnetic force is finally concentrated in the second distance L2. The magnetic force gathered toward the first distance L1 is relatively reduced, which can reduce the magnetic force.
  • the electromagnetic force finally transmitted can be relatively increased, so that the moving coil assembly 43 generates sufficient magnetic thrust to reciprocate in the axial direction of the magnetic core 44 to drive the valve plug to move. Furthermore, the accuracy of the valve plug operation and the reliability of the overall operation of the electromagnetic drive device are further improved.
  • the permanent magnet 41 has a generally hollow ring structure, and can be provided by more than one inner and outer diameter radiation magnetization processing. In this embodiment, one permanent magnet 41 is used as an example for illustration.
  • the permanent magnet 41 includes an outer diameter magnetic pole portion 411 and an inner diameter magnetic pole portion 412.
  • the outer diameter magnetic pole portion 411 and the inner diameter magnetic pole portion 412 of the permanent magnet 41 are two different magnetic poles.
  • the inner wall is the inner wall of the side wall portion 402.
  • the inner diameter magnetic pole portion 412 is attached to the outer wall of the magnet 42.
  • the magnet 42 is located between the moving coil assembly 43 and the permanent magnet 41.
  • the field line group 431 is located at the magnetic field.
  • the magnetically conductive 42 includes the magnetically conductive boss 42a,
  • the magnetizer 42 may have a single or split structure. In this embodiment, when the magnetizer 42 is a split structure, it includes a first magnet 421 and a second magnet 422. The first magnet 421 has a first magnet.
  • a boss 421a, the second magnetically permeable magnet 422 has a second magnetic permeability
  • the body guide 422a, the first magnet guide 421 and the second magnet 422 are symmetrically arranged, the first guide magnet 421a and the second guide magnet 422a are abutted; when the guide magnet 42 is a split structure, a third At least one of the magnetizer, the fourth magnetizer, the third magnetizer, and the fourth conductor is provided with a magnetically permeable boss 42a.
  • the magnetizer 42 can also be processed and formed as an integrated structure. What needs to be explained is the above method.
  • the structure of the magnetically permeable magnet 42 may also have other extensible solutions. It should also be considered to be within the protection scope claimed by the present invention.
  • the outer diameter magnetic pole portion 411 transmits magnetic force to the conductive via the magnetically permeable casing 40.
  • the magnetic core 44 has a second gap L2 formed between the first magnetic guide boss 421a and the second magnetic guide boss 422a and the side wall of the magnetic guide core 44.
  • the inner diameter magnetic pole portion 412 passes through the first magnetic guide boss 421a and the second guide.
  • the magnet boss 422a transmits a magnetic force to the magnetizing core to form a ring-shaped permanent magnetic circuit type in the inner cavity 48 of the motor 4a.
  • the housing 40 further includes an extending portion 403 extending outward from the side wall portion 402.
  • the electromagnetic driving device 4a further includes a cover plate 47, which includes a parallel portion 471 and a protruding portion 472.
  • the parallel portion 471 cooperates with the extending portion 403 and The two can be provided with corresponding screw holes.
  • the housing 40 and the cover plate 47 can be fixedly connected by means of screws or welding.
  • the housing 40 can form a cavity of the electromagnetic driving device by fixed connection with the magnetic core 44 and the cover plate 47, respectively. 48.
  • the motor 4a is further provided with a sheath component 46.
  • the sheath component 46 may use an insulating member.
  • the plastic injection molding provided in this embodiment is used to The magnet 41 plays a protective positioning role to prevent the magnet 41 from moving in the axial direction.
  • the sheath assembly 46 includes a first sheath 461 and a second sheath 462.
  • the first sheath 461 is located at a first distance L1 and the first sheath. 461 abuts the top wall portion 401 and the first sheath 461 abuts the upper ends of the permanent magnet 41 and the magnet guide 42, and the second sheath 462 abuts the lower ends of the permanent magnet 41 and the magnet guide 42.
  • the rising portion 472 presses the second sheath 462.
  • the sheath component 46 restricts the axial direction of the permanent magnet 41 to prevent series movement in the axial direction, and the sheath component 46 positions the magnet 42 in the axial direction to prevent it from falling.
  • the electromagnetic drive device includes a valve plug 4b.
  • the valve plug 4b includes a valve body 41b and a diaphragm 42b.
  • the electromagnetic drive device 4a further includes an adjustment mechanism 45 that adjusts the initial position of the wire frame 432.
  • the adjustment mechanism 45 includes adjustment The lever 451, the spring seat 452 and the spring 453.
  • the adjustment lever 451 is screwed into the magnet core 44 to adjust the initial position of the wire frame 432.
  • the spring seat 452 is fixed to the end boss of the adjustment lever 451, and the spring 453 is assembled on the spring seat. 452 and the inner boss of the wire frame 432.
  • the moving coil assembly 43 includes a field wire group 431 and a wire frame 432.
  • the field wire group 431 is fixedly mounted on the wire frame 432.
  • the wire frame 432 includes a wire frame head 432a.
  • the wire frame head 432a can abut against the valve plug 4b.
  • the adjustment mechanism 45 The initial position of the wire frame 432 is adjusted.
  • the exciting line group 431 After the DC power is connected, the exciting line group 431 generates an axial magnetic field.
  • the second distance L2, where the magnetic force is concentrated, has a radial magnetic field relative to the axial magnetic field.
  • the mutual formation of mutual axial traction or repulsive force causes the moving coil assembly 43 to reciprocate along the axial direction of the magnet core 44.
  • the moving coil assembly 43 can drive the valve plug 4b to move axially downward.
  • the invention also provides a gas proportional valve having the electromagnetic driving device.
  • the gas proportional valve includes a main valve seat 1, and the main valve seat 1 is provided with an inlet 1 a and an outlet 1 b. The inflow flows from the outlet 1b.
  • the main valve seat 1 can be die-casted by aluminum alloy.
  • the main valve seat 1 is fixedly connected with a first electromagnetic drive component 2, a second electromagnetic drive component 3, and an electromagnetic drive device.
  • the inner cavity of the main valve seat 1 is provided.
  • the main valve seat 1 is also provided with a first valve port 11, a second valve port 12, a third valve port 13 and a main valve port 14 corresponding to the above components.
  • the electromagnetic drive assembly 2 and the second electromagnetic drive 3 dominate the use of gas safety switches. When one of the first electromagnetic drive assembly 2 and the second electromagnetic drive assembly 3 is powered off, it can also ensure the safe opening or closing.
  • the electromagnetic drive 4 and the pressure difference The regulating device 5 leads the gas flow regulating function, and controls the opening of the indirect driving differential pressure regulating device 5 by controlling the current supplied by the electromagnetic driving device 4a to achieve the precise regulation of the gas flow through the main valve port 14.
  • the inner cavity is also provided with a first pressure Difference channel 15 And the second differential pressure channel 16, the gas passes through the first valve port 11 and enters the first differential pressure channel 15 and the second differential pressure channel 16 through the second valve port 12, because the third valve port 13 is normally open, the gas is supplied by The third valve port 13 flows out through the pressure relief hole 17 and is discharged to the outlet 1b, and the outlet 1b is connected to the combustion chamber.
  • the motor provided by the present invention includes a top wall portion 401 and a side wall portion 402.
  • the top wall portion 401 and the magnet core 44 are fixedly connected.
  • the housing 40 includes at least a magnet portion, and a moving coil assembly is provided on the outer peripheral portion of the magnet core 44. 43.
  • the moving coil assembly 43 can move axially along the magnet core 44.
  • the electromagnetic driving device 4a is provided with a cavity 48.
  • the electromagnetic driving device 4a further includes a permanent magnet 41 and a magnet 42.
  • the permanent magnet 41 and the magnet 42 are located The cavity 48, the permanent magnet 41, and the magnet guide 42 are located on the outer periphery of the moving coil assembly 43, and the housing 40 covers the permanent magnet 41 and the magnet guide 42.
  • the permanent magnet 41 is sleeved on the outer periphery of the magnet guide 42.
  • the permanent magnet 41 It is located between the side wall portion 402 and the magnetism guide 42.
  • the shell and the magnetism guide can provide magnetic force transmission for the permanent magnet.
  • the magnetic force transmission process is completed in the cavity.
  • the magnetic leakage can be relatively reduced. Phenomenon, enhance the effect of magnetic permeability and magnetic concentration, and then increase the electromagnetic force, so that the moving coil assembly 43 generates sufficient magnetic thrust to reciprocate along the axis direction of the magnetic core 44 to drive the valve plug to move, and Further enhance the accuracy of the spool and a solenoid driving means for moving the entire actuator reliability.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

一种电磁驱动装置，设有腔体（48），电磁驱动装置包括外壳（40）、导磁铁芯（44），外壳（40）包括顶壁部（401）以及侧壁部（402），顶壁部（401）与导磁铁芯（44）固定连接，外壳（40）包括至少部分导磁部，导磁铁芯（44）的外周设有动线圈组件（43），动线圈组件（43）能够沿导磁铁芯（44）的轴线方向作往复运动，电磁驱动装置还包括永磁体（41）以及导磁体（42），永磁体（41）以及导磁体（42）位于腔体，永磁体（41）套设于导磁体（42）的外周部，永磁体（41）位于侧壁部（402）与导磁体（42）之间；在磁力传递过程中外壳（40）和导磁体（42）能够提供磁力传递作用，从而相对减少漏磁现象。

Description

电磁驱动装置及具有该电磁驱动装置的燃气比例阀
本申请要求于2018年7月31日提交中国专利局、申请号为201810855836.8、发明名称为“电磁驱动装置及具有该电磁驱动装置的燃气比例阀”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及电磁驱动控制及燃气控制技术领域，特别涉及一种电磁驱动装置及应用该电磁驱动装置的燃气比例阀。
背景技术
电磁驱动装置包括永磁体、导磁铁芯以及线圈部件，由电磁线圈通电产生的磁场与永磁体产生的磁场进行相互作用，从而由线圈部件带动阀塞作往复运动，当线圈部件获得的磁力越大，越有利于控制阀塞的作动精度，而电磁驱动装置往往存在漏磁现象，从而影响活动线圈部件所获得的电磁力。因此，如何改善电磁驱动装置的漏磁现象，是本领域技术人员需要解决的技术问题。
发明内容
本发明的主要目的在于提供电磁驱动装置及具有该电磁驱动装置的燃气比例阀，应用该电磁驱动装置的结构能够改善漏磁现象。
本发明提供一种电磁驱动装置，设有腔体，电磁驱动装置包括外壳、导磁铁芯，外壳至少包括导磁部，该导磁部包括顶壁部以及侧壁部，顶壁部与导磁铁芯固定连接，导磁铁芯的外周设有动线圈组件，动线圈组件能 够沿导磁铁芯的轴线方向作往复运动，电磁驱动装置还包括永磁体以及导磁体，永磁体以及导磁体位于腔体，永磁体套设于导磁体的外周部，永磁体位于侧壁部与所述导磁体之间，顶壁部与导磁体不直接接触。
本发明还提供一种燃气比例阀包括主阀座，主阀座设有进口以及出口,主阀座固定连接有第一电磁驱动组件、第二电磁驱动组件以及电磁驱动装置，主阀座的内腔还设有压差调节装置，第一电磁驱动组件以及第二电磁驱动组件主导燃气比例阀的安全开关作用，电磁驱动装置以及压差调节装置主导燃气流量调节作用。
本发明提供的电磁驱动装置包括外壳、导磁铁芯，外壳至少包括导磁部，该导磁部包括顶壁部以及侧壁部，顶壁部与导磁铁芯固定连接，电磁驱动装置还包括永磁体以及导磁体，电磁驱动装置设有腔体，永磁体以及导磁体位于该腔体，永磁体套设于导磁体的外周部，顶壁部与导磁体不直接接触，磁力传递时外壳以及导磁体能够为永磁体提供磁力传递作用且永磁体以及导磁体位于该腔体，能够相对减少漏磁改善漏磁现象。
附图说明
图1为本发明提供的电磁驱动装置(未带阀塞)的剖面视图；
图2为本发明提供的电磁驱动装置的整体剖面视图；
图3为本发明提供的电磁驱动装置极具有该电磁驱动装置的燃气比例阀剖面视图；
图4为本发明提供的电磁驱动装置的永磁体的磁极结构剖视图；
具体实施方式
如图2结合图1所示所示为本发明提供的电磁驱动装置，该电磁驱动 装置4a包括外壳40、导磁铁芯44，该外壳40至少包括导磁部，该导磁部包括顶壁部401和侧壁部402，该顶壁部401和导磁铁芯44固定连接，导磁铁芯44的外周部设有动线圈组件43，动线圈组件43能够沿导磁铁芯44的轴线方向进行往复运动，该电磁驱动装置4a设有腔体48，电磁驱动装置4a还包括永磁体41以及导磁体42，永磁体41以及导磁体42位于腔体48，永磁体41以及导磁体42位于动线圈组件43的外周部，外壳40大致将永磁体41以及导磁体42罩设，永磁体41套设于导磁体42的外周部，永磁体41位于侧壁部402与导磁体42之间，顶壁部401与导磁体42不直接接触。具体地，外壳40分别通过与导磁铁芯44以及盖板47的固定连接大致形成该电机4a的腔体48，外壳至少包括导磁部，需要说明的是这里的导磁部指的是具有导磁性的部件，该外壳40可以只包含导磁部即外壳40整体可由导磁金属板材冲压成型，外壳40也可以为低碳钢或其他导磁性材料制成，或者也可将导磁部作为嵌件与塑料件或其他材料注塑成型为该外壳40，只需保证该外壳40具有导磁性即可，外壳40整体大致呈筒状结构，导磁铁芯44为纯铁或低碳钢导磁材料车削加工而成，外壳40的顶壁部401与导磁铁芯44可通过焊接或铆接等方式固定连接，电磁驱动装置4a包括动线圈组件43，动线圈组件43包括励磁线组431以及线架432，该励磁线组431与线架432固定连接，永磁体41以及导磁体42位于腔体48且永磁体41以及导磁体42位于动线圈组件43的外周部，外壳40大致将永磁体41以及导磁体42罩设，如图3所示永磁体41整体可为大致中空环状结构，永磁体41可为一体环形结构也可为分体的环形结构，永磁体41设有内环面以及外环面，永磁体41还包括外径磁极部411以及内径磁 极部412，该外径磁极部411相对靠近外环面，该内径磁极部412相对靠近外环面，外壳40的侧壁部402大致将永磁体41的外环面围设，导磁体42大致将永磁体41的内环面围设，外径磁极部411与侧壁部402相贴合，内径磁极部412与导磁体42的外壁相贴合，需要说明的是这里的贴合指的是两者可以相抵也可以留有一定的间隙只要确保永磁体41不掉落即可，如图4所示，当外径磁极部411为N极，内径磁极部412为S极时，N极通过具有导磁性的外壳40传递至导磁铁芯44由导磁铁芯44回路至S极，内径磁极部412的S极通过聚磁于导磁体42的导磁凸台42a通过导磁铁芯44由外壳40回至N极以形成闭环式的永磁磁路形态，磁力在传递过程中均在腔体48内进行，且外壳40和导磁体42在磁力传递过程中为磁力提供传递作用能够减少背景技术中的漏磁现象，从而造成磁损的情况，能够相对改善漏磁现象，外壳40以及导磁体42为永磁体41提供磁力传导作用能够减少漏磁现象提升导磁效果，进而相对提升电磁驱动装置的作动可靠性。
该外壳40包括顶壁部401以及侧壁部402，顶壁部401与导磁铁芯44固定连接，侧壁部402大致将永磁体41的外周部围设，永磁体41位于该侧壁部402与导磁体42之间，该顶壁部401与导磁体42的上端部之间形成有第一间距L1,该导磁体42与导磁铁芯44的侧壁之间形成有第二间距L2，详细地该导磁体42的导磁体凸台与导磁铁芯44的侧壁之间形成有第二间距L2，是本实施例中顶壁部401与侧壁部402通过台阶部相连接，且该台阶部与永磁体41的上端面相抵，在具体实施时可取消该台阶部，直接将顶壁部401以及侧壁部402相连使顶壁部401距离永磁体41的上端部也形成有一定的间距，需要说明的是该外壳40的顶壁部401与导磁体42不 直接接触且形成有第一间距L1，如顶壁部401与导磁体42直接接触则根据距离越近越容易聚磁的原理，磁力传递时外径磁极部N极通过侧壁部402传递至顶壁部401后直接回至导磁体42的S极磁路直接导通，将无法在聚集较多的磁力在第二间距L2，从而动线圈组件43将无法获得足够的磁推力进行正常的轴向作动动线圈组件43的励磁线组431位于该导磁体凸台与导磁铁芯44之间，第一间距L1大于第二间距L2有利于永磁体41近距离传递磁力，磁力传递时磁力能够聚磁于导磁体42的导磁体凸台使磁力最终较为集中于该第二间距L2，通电状态下动线圈组件43产生的轴向磁场与在该第二间距L2形成的相对该轴向磁场的径向磁场之间产生相互的排斥力或牵引力，因磁力较为集中于该第二间距L2，励磁组件431能够感应到足够的磁力以驱动动线圈组件43整体沿导磁铁芯44的轴线方向进行往复运动，因第一间距L1大于第二间距L2，根据距离越近越容易聚磁的原理，磁力传递过程中外径磁极部411由外壳40的侧壁部402经台阶部以及顶壁部401传递至导磁铁芯44，因第一间距L1大于第二间距L2，磁力更容易往第二间距L2的方向去聚集，同样在磁力传递过程中内径磁极部412将磁力聚磁于该导磁体凸台，因第一间距L1大于第二间距L2，磁力朝第一间距L1方向的漏磁减少即磁损相对减少，即磁力最终较为集中于该第二间距L2朝第一间距L1聚集的磁力相对减少，能够减少磁损增强导磁以及聚磁效果，改善漏磁现象最终所传递的电磁力能够相对增大使动线圈组件43产生足够的磁推力沿导磁铁芯44的轴线方向进行往复运动以带动阀塞进行运动，进而进一步提升阀塞作动的精度以及电磁驱动装置的整体作动的可靠性。
下面简单介绍永磁体41以及导磁体42，永磁体41大致呈中空环状结构，可设置一个以上内、外径辐射充磁式加工而成，本实施例中以一个永磁体41为例进行说明，永磁体41包括外径磁极部部411以及内径磁极部部412，永磁体41的外径磁极部部411以及内径磁极部部412为两个不同的磁极，外径磁极部部411与外壳40的内壁即侧壁部402的内壁相贴合，内径磁极部部412与导磁体42的外壁相贴合，导磁体42位于动线圈组件43以及永磁体41之间，励磁线组431位于导磁凸台42a和导磁铁芯44之间，励磁线组431随线架432进行轴向升降过程中始终位于导磁凸台42a和导磁铁芯44之间，导磁体42包括导磁凸台42a,该导磁体42可为一体或分体结构，在本实施例中当导磁体42为分体结构时包括第一导磁体421以及第二导磁体422，该第一导磁体421具有第一导磁体凸台421a，该第二导磁体422具有第二导磁体凸台422a，第一导磁体421与第二磁体422呈对称设置，第一导磁体凸台421a与第二导磁体凸台422a贴合；当导磁体42为分体结构时可包括第三导磁体以及第四导磁体，第三导磁体以及第四导体的两者中的至少一个设有导磁凸台42a,该导磁体42也可为一体结构加工成型，需要说明的是除以上方式外该导磁体42的结构还可以有其他可延伸的方案也应当被认为在本发明要求的保护范围中，本发明提供的实施例中外径磁极部411通过具有导磁性的外壳40传递磁力至导磁铁芯44，第一导磁体凸台421a与第二导磁体凸台422a与导磁铁芯44的侧壁形成有第二间距L2，内径磁极部412通过第一导磁体凸台421a与第二导磁体凸台422a传递磁力至导磁铁芯以形成在电机4a内腔48的环形永磁磁路型态，。
外壳40还包括由侧壁部402向外延伸的延伸部403，电磁驱动装置4a还包括盖板47，盖板47包括平行部471以及凸起部472，平行部471与延伸部403相配合且两者可开设有对应的螺钉孔，外壳40与盖板47可通过螺钉或焊接等方式固定连接，外壳40分别通过与导磁铁芯44以及盖板47的固定连接大致形成电磁驱动装置的腔体48，为使永磁体41在腔体48实现更好的定位，电机4a,还设有护套组件46，护套组件46可采用绝缘件，本实施提供的为塑料件注塑成型用于对永磁体41起到防护定位作用防止其在轴向方向的串动，护套组件46包括第一护套461以及第二护套462，第一护套461位于第一间距L1且该第一护套461与顶壁部401相抵且该第一护套461与永磁体41和导磁体42的上端部相抵，第二护套462与永磁体41以及导磁体42的下端部相抵，盖板47的凸起部472对第二护套462进行压抵。护套组件46对永磁体41的轴向进行限位防止其在轴向方向的串动，且护套组件46对导磁体42在轴向方向进行定位防止其掉落。
该电磁驱动装置包括阀塞4b，阀塞4b包括阀塞本体41b以及隔膜片42b,电磁驱动装置4a还包括调节机构45，调节机构45对线架432的初始位置进行调节，调节机构45包括调节杆451、弹簧座452以及弹簧453，调节杆451旋入导磁铁芯44内对线架432的初始位置进行调节，弹簧座452的固定于调节杆451的端面凸台，弹簧453装配在弹簧座452以及线架432的内凸台上。动线圈组件43包括励磁线组431以及线架432，励磁线组431固定安装于线架432，线架432包括线架头432a，线架头432a能够与阀塞4b相抵接配合，调节机构45对线架432的初始位置进行调节，接入直流电源后励磁线组431产生轴向磁场，磁力较为集中的第二间距L2 具有相对轴向磁场的径向磁场，该轴向磁场与径向磁场相互作用形成相互轴向的牵引力或排斥力使驱动动线圈组件43沿导磁铁芯44的轴线方向进行往复运动，动线圈组件43能够带动阀塞4b轴向向下运动。
本发明还提供了一种具有该电磁驱动装置的燃气比例阀，如图3所示，该燃气比例阀包括主阀座1，该主阀座1设有进口1a和出口1b,燃气从进口1a流入由出口1b流出，主阀座1可以为铝合金压铸成型，主阀座1固定连接有第一电磁驱动组件2、第二电磁驱动组件3以及电磁驱动装置，主阀座1的内腔设有压差调节装置5，主阀座1还设有与上述部件相对应的第一阀口11、第二阀口12、第三阀口13以及主阀口14，燃气比例阀可以由第一电磁驱动组件2和第二电磁驱动3主导燃气安全开关用途，当第一电磁驱动组件2与第二电磁驱动组件3的其中一道断电还可以保证安全开启或关闭，电磁驱动装置4和压差调节装置5主导燃气流量调节功能，通过控制电磁驱动装置4a供应电流进行间接驱动压差调节装置5的开度以实现通过主阀口14的燃气流量的精确调节，内腔还设有第一压差通道15以及第二压差通道16，燃气通过第一阀口11后经第二阀口12进入第一压差通道15以及第二压差通道16，由于第三阀口13为常开状态，燃气由第三阀口13流出通过泄压孔17排出至出口1b，出口1b与燃烧室相连接。
本发明提供的电机包括顶壁部401和侧壁部402，该顶壁部401和导磁铁芯44固定连接，该外壳40至少包括导磁部，导磁铁芯44的外周部设有动线圈组件43，动线圈组件43能够沿导磁铁芯44进行轴向运动，该电磁驱动装置4a设有腔体48，电磁驱动装置4a还包括永磁体41以及导磁体42，永磁体41以及导磁体42位于腔体48，永磁体41以及导磁体42 位于动线圈组件43的外周部，外壳40大致将永磁体41以及导磁体42罩设，永磁体41套设于导磁体42的外周部，永磁体41位于侧壁部402与导磁体42之间，该结构中外壳以及导磁体能够为永磁体提供磁力传递作用，磁力传递过程均在该腔体完成，对比背景技术的电磁驱动装置能够相对减少漏磁现象，增强导磁和聚磁效果，进而提升电磁力，使动线圈组件43产生足够的磁推力沿导磁铁芯44的轴线方向进行往复运动以带动阀塞进行运动，进而进一步提升阀塞作动的精度以及电磁驱动装置的整体作动的可靠性。
需要说明的是本发明所提及的“第一、第二”等序数词仅仅为区分不同零部件的命名方式不应该认为对各零部件有相关次序上的限定，本发明所提及的“上、下”等方位词也同样是基于本发明所提供的说明书附图进行描述，以上仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明远离的前提下，还可以做出若干改进和润饰，这些改进和润饰也应当视为本发明的保护范围。

Claims (11)

  1. 电磁驱动装置，其特征在于，所述电磁驱动装置设有腔体(48)，所述电磁驱动装置包括外壳(40)、导磁铁芯(44)，所述外壳(40)至少包括导磁部，所述导磁部包括顶壁部(401)以及侧壁部(402)，所述顶壁部(401)与所述导磁铁芯(44)固定连接，所述导磁铁芯(44)的外周设有动线圈组件(43)，所述动线圈组件(43)能够沿所述导磁铁芯(44)的轴线方向作往复运动，所述电磁驱动装置还包括永磁体(41)以及导磁体(42)，所述永磁体(41)以及所述导磁体(42)位于所述腔体(48)，所述永磁体(41)套设于所述导磁体(42)的外周部，所述永磁体(41)位于所述侧壁部(402)与所述导磁体(42)之间，所述顶壁部(401)与所述导磁体(42)不直接接触。
  2. 根据权利要求1所述的电磁驱动装置，其特征在于，所述永磁体(41)设有内环面以及外环面，还包括相对靠近所述外环面的外径磁极部(411)以及相对靠近所述内环面的内径磁极部(412)，所述外径磁极部(411)与所述侧壁部(402)的内壁相贴合，所述内径磁极部(412)与所述导磁体(42)的外壁相贴合。
  3. 根据权利要求2所述的电磁驱动装置，其特征在于所述顶壁部(401)与所述导磁体(42)的上端面之间形成有第一间距(L1)，所述导磁体(42)具有导磁凸台(42a)，所述导磁凸台(42a)与所述导磁铁芯(44)的侧壁之间形成有第二间距(L2),所述第一间距(L1)大于所述第二间距(L2)。
  4. 根据权利要求3所述的电磁驱动装置，其特征在于，所述导磁体(42)为分体结构包括第一导磁体(421)以及第二导磁体(422)，所述第一导磁 体(421)设有第一导磁凸台(421a)，所述第二导磁体(422)设有第二导磁凸台(422a)，所述第一导磁体(421)与所述第二导磁体(422)呈对称设置。
  5. 根据权利要求3所述的电磁驱动装置，其特征在于，所述导磁体(42)包括第三导磁体以及第四导磁体，所述第三导磁体以及所述第四导磁体中至少有一者设有所述导磁凸台。
  6. 根据权利要求3所述的电磁驱动装置，其特征在于，所述导磁体(42)为一体加工成型结构。
  7. 根据权利要求3所述的电磁驱动装置，其特征在于，所述动线圈组件(43)包括励磁线组(431)，所述励磁线组(431)位于所述导磁凸台(42a)与所述导磁铁芯(44)之间。
  8. 根据权利要求1所述的电磁驱动装置，其特征在于，所述顶壁部(401)与所述导磁体(42)的上端面之间形成有第一间距(L1)，所述电磁驱动装置还包括护套组件(46)，包括第一护套(461)以及第二护套(462)，所述第一护套(461)位于所述第一间距(L1)，所述第一护套(461)与所述顶壁部(401)相抵以及所述第一护套(461)与所述永磁体(41)和所述导磁体(42)的上端部相抵接，所述第二护套(462)与所述永磁体(41)和所述导磁体(42)的下端部相抵接。
  9. 根据权利要求8所述的电磁驱动装置，其特征在于，所述外壳(40)还包括延伸部(403)，所述电机还包括盖板(47)，所述外壳(40)与所述盖板(47)固定连接，所述盖板(47)包括平行部(471)和凸起部(472)，所述平行部(471)与所述延伸部(403)相配合，所述盖板(47)的凸起 部(472)对所述第二护套(462)进行压抵。
  10. 根据权利要求1所述的电磁驱动装置，其特征在于，所述电磁驱动装置还包括阀塞(4b)，所述阀塞(4b)包括阀塞本体(41b)以及隔膜片(42b),所述电磁驱动装置还包括调节机构(45)，所述动线圈组件(43)包括励磁线组(431)以及线架(432)，所述励磁线组(431)固定安装于所述线架(432)，所述线架(432)包括线架头(432a)，所述线架头(432a)能够与所述阀塞(4b)相抵接配合，所述调节机构(45)对所述线架(432)的初始位置进行调节，所述动线圈组件(43)能够带动所述阀塞(4b)轴向向下运动。
  11. 一种燃气比例阀，其特征在于，包括主阀座(1)，所述主阀座(1)设有进口(1a)以及出口(1b),所述主阀座(1)固定连接有第一电磁驱动组件(2)、第二电磁驱动组件(3)以及电磁驱动装置(4)，所述主阀座(1)的内腔还设有压差调节装置(5)，所述主阀座(1)设有与所述第一电磁驱动组件(2)相对应的第一阀口(11)、与所述第二电磁驱动组件(3)相对应的第二阀口(12)、与所述电磁驱动装置(4)相对应的第三阀口(13)以及与所述压差调节装置(5)相对应的主阀口(14)，所述第一电磁驱动组件(2)以及所述第二电磁驱动组件(3)主导所述燃气比例阀的安全开关作用，所述电磁驱动装置(4)以及所述压差调节装置(5)主导燃气流量调节作用，所述电磁驱动装置(4)为权利要求1-10任一一项所述的电磁驱动装置。
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