WO2021115233A1 - 一种电动阀 - Google Patents

一种电动阀 Download PDF

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Publication number
WO2021115233A1
WO2021115233A1 PCT/CN2020/134380 CN2020134380W WO2021115233A1 WO 2021115233 A1 WO2021115233 A1 WO 2021115233A1 CN 2020134380 W CN2020134380 W CN 2020134380W WO 2021115233 A1 WO2021115233 A1 WO 2021115233A1
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WO
WIPO (PCT)
Prior art keywords
rod assembly
annular
electric valve
assembly
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/134380
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English (en)
French (fr)
Inventor
王壬
汪立新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sanhua Automotive Components Co Ltd
Original Assignee
Zhejiang Sanhua Automotive Components Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sanhua Automotive Components Co Ltd filed Critical Zhejiang Sanhua Automotive Components Co Ltd
Priority to JP2022524660A priority Critical patent/JP7315794B2/ja
Priority to CN202080083934.XA priority patent/CN115769011A/zh
Priority to US17/783,325 priority patent/US12352358B2/en
Priority to EP20897919.5A priority patent/EP4075032B1/en
Publication of WO2021115233A1 publication Critical patent/WO2021115233A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/02—Diaphragms
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/50—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall
    • F16J15/52—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall by means of sealing bellows or diaphragms
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/12—Covers for housings
    • 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
    • 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
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
    • F16K41/12—Spindle sealings with diaphragm, e.g. shaped as bellows or tube with approximately flat diaphragm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to the technical field of flow regulation, in particular to an electric valve.
  • Electric valves can be widely used in fluid medium pipeline systems and can be used to adjust medium flow. Taking the application of electric valves in the automotive field as an example, electric valves can be used in air conditioning systems, engine cooling systems, battery cooling systems, or fuel supply systems.
  • the electric valve includes a valve core component that can move relative to the housing.
  • the valve core component is driven by the driving part.
  • fluid will corrode the driving part, and it is necessary to prevent the fluid in the valve cavity from leaking to the driving part.
  • the solution discloses an electric valve, which includes a housing and an end cover.
  • the housing has a first cavity and a valve port.
  • the electric valve further includes a rotor assembly, a rod assembly, and a valve core assembly.
  • the rotor assembly is connected to one end of the rod assembly, and the rod assembly The other end of is connected with the valve core assembly;
  • the electric valve also includes a sealing component, which is far away from the valve port relative to the valve core assembly;
  • the sealing component includes a first cylindrical part and a diaphragm part, the first cylindrical part has a second through hole, another part of the rod assembly passes through the second through hole, the first cylindrical part is connected to the rod assembly and the connection is sealed, The outer peripheral side of the diaphragm part is sealed with the housing and/or the end cover.
  • the first cylindrical part is connected to the rod assembly and the connection is sealed, and the outer peripheral side of the diaphragm part is sealed with the housing and/or the end cover, which can better prevent the fluid from contacting the rotor assembly and prevent the fluid from corroding Rotor assembly. Moreover, the setting of the diaphragm part does not affect the up and down movement of the rod assembly.
  • the sealing component further includes an annular sealing portion, and the diaphragm portion is located between the annular sealing portion and the first cylindrical portion; the annular sealing portion is clamped to the end cover With the casing, the annular sealing portion is in a compressed state, which can better realize the sealing between the sealing component and the cover body and the casing.
  • Figure 1 shows a schematic front view of an embodiment of the present invention
  • Fig. 2 shows a schematic partial cross-sectional view of the electric valve shown in Fig. 1 along the line E-E;
  • Fig. 3 shows a partial enlarged schematic diagram of the electric valve shown in Fig. 2;
  • Fig. 4 shows a schematic cross-sectional view of the sealing component shown in Fig. 2;
  • Fig. 5 shows an exploded schematic diagram of a part of the electric valve shown in Fig. 2;
  • Fig. 6 shows a partial enlarged schematic diagram of the electric valve shown in Fig. 2.
  • the electric valve includes a housing 26 and an end cover 16.
  • the housing 26 has a first cavity 1 and a valve port 265.
  • the electric valve also includes a rod assembly 14 and a valve core assembly 33.
  • One end of the rod assembly 14 is connected to the valve core assembly 33, and the other end of the rod assembly 14 is connected to the rotor assembly 10.
  • the rod assembly 14 and the valve core assembly 33 can move up and down in the extension direction of the rod assembly 14 to open or close the valve port 265.
  • the housing 26 includes a first channel 261 and a second channel 262.
  • the first channel 261 communicates with the first cavity 1, and the valve port 265 can communicate the second channel 262 with the first cavity 1.
  • the electric valve further includes a coil assembly 31 and a sleeve 3.
  • the sleeve 3 and the end cover 16 are fixed and the connection is sealed, the inner side of the sleeve 3 forms a second cavity 36, and at least a part of the rotor assembly 10 is disposed in the second cavity 36.
  • the coil assembly 31 is sleeved on the sleeve 3.
  • the end cover 16 includes a first through hole 163 penetrating the end cover 16. A part of the rod assembly 14 passes through the first through hole 163 of the end cover 16 and is drivingly connected to the rotor assembly 10.
  • the rod assembly 14 is slidingly fitted with the inner wall corresponding to the first through hole 163.
  • the rotor assembly 10 also includes a screw rod 8 and a permanent magnet 4.
  • the nut part 12 is sleeved on the periphery of the screw rod 8.
  • the nut part 12 and the screw rod 8 are matched by threads.
  • the nut part 12 is fixed with the end cover 16, and the screw rod 8 can be opposite to
  • the nut component 12 moves up or down, and the screw rod 8 can drive the rod assembly 14 to move.
  • An elastic element 11 is provided between the rod assembly 14 and the screw rod 8.
  • the first passage 261 and the second passage 262 of the electric valve can be connected to the pipeline of the fuel cell system with higher pressure, in order to prevent the higher pressure fluid in the first cavity 1 from entering the part of the rotor assembly 10 or to reduce external leakage Risk, as shown in Figures 2 to 4, the electric valve further includes a sealing member 19, which is far away from the valve port 265 relative to the valve core assembly 33.
  • the sealing member 19 includes a first cylindrical portion 192 and an annular diaphragm portion 191.
  • the first cylindrical portion 192 is located on the inner peripheral side of the diaphragm portion 191.
  • the first cylindrical portion 192 includes a second through hole 193. Another part of the rod assembly 14 passes through the second through hole 193 of the sealing member 19 and is connected to the valve core.
  • the assembly 33 is connected, the outer peripheral side of the diaphragm portion 191 is connected with the housing 26 and the end cover 16 and the connection is sealed.
  • the sealing member 19 may be made of rubber or metal, and the sealing member 19 has elasticity.
  • the diaphragm portion 191 includes a first flat portion 196 connected to the annular sealing portion 195, a second flat portion 197 connected to the first cylindrical portion 192, and located at the first flat portion 196 and the second flat portion 196.
  • the corrugated part 198 between the parts 197 and the corrugated part 198 can produce a telescopic effect under the action of an external force to adapt to the vertical movement of the rod assembly 14.
  • the part of the sealing member 19 in contact with the rod assembly 14 does not move relative to the rod assembly 14, and the part of the sealing member 19 in contact with the housing 26 does not move relative to the housing 26.
  • the use of static seals can reduce the risk of leakage.
  • the outer peripheral side of the diaphragm portion 191 may only be connected to the housing 26 or the end cover 16 and the connection is sealed.
  • the electric valve further includes an annular sleeve 20 that surrounds the outer circumference of the first cylindrical portion 192 and surrounds the second through hole 193.
  • the first cylindrical portion 192 includes an outer wall portion and a second through hole 193.
  • the inner wall portion, inner wall portion and outer wall portion of the inner side of the two through holes 193 are located on the inner and outer sides of the first cylindrical portion 192.
  • the annular sleeve 20 is in interference fit with the outer wall portion of the first cylindrical portion 192, and the annular sleeve 20 can be aligned with the first cylindrical portion 192.
  • the cylindrical portion 192 exerts pressure on the rod assembly 14 so that the first cylindrical portion 192 and the outer circumference of the rod assembly 14 are closely attached, which can reduce the leakage at the second through hole 193, thereby preventing the first cavity 1
  • the fluid with a higher internal pressure enters the rotor assembly 10 part, thereby preventing the fluid from corroding the rotor assembly 10, and also preventing the fluid from freezing at a low temperature after entering the second cavity 36 and causing the rotor assembly 10 to fail to rotate.
  • the electric valve further includes a first limiting member 21, which is located at an end of the annular sleeve 20 away from the first through hole 163, and at least a part of the outer portion of the first limiting member 21
  • the diameter is greater than the inner diameter of the annular sleeve 20, the first limiting member 21 abuts against the annular sleeve 20, and the first limiting member 21 is fixed to the rod assembly 14, so that the end of the annular sleeve 20 abutting the first limiting member 21 obtains a shaft To the limit.
  • the first limiting member 21 is a retaining ring
  • the rod assembly 14 has a groove 142 recessed in the outer peripheral surface of the rod assembly 14.
  • the groove 142 corresponds to the first limiting member 21, and the first limiting member 21 A part of the first limiting member 21 extends into the groove 142, so that the first limiting member 21 is limited in the axial direction, and the other part of the first limiting member 21 extends outward in the radial direction of the rod assembly 14 and is connected to one end of the sleeve 20 Abut.
  • the retaining ring can be an E-shaped retaining ring, and the inner diameter of the retaining ring can be changed, so that the thicker part of the rod assembly 14 can reach the groove 142 during installation.
  • the first limiting member 21 may also be a nut, and the first limiting member 21 may be fixed to the rod assembly 14 by internal threads. However, the structure of the retaining ring is simpler than that of the nut, and the cost is lower. In other embodiments, the first limiting member 21 may also be a part of the rod assembly 14.
  • the electric valve further includes a second limiting member 18, the second limiting member 18 is located at an end of the sealing member 19 close to the first through hole 163, and the outer diameter of at least a part of the second limiting member 18 is larger than the first through hole 163. With the diameter of the two through holes 193, the sealing member 19 abuts against the second limiting member 18.
  • the second limiting member 18 is fixedly connected to the rod assembly 14 or is an integral structure. As a result, one end of the first cylindrical portion 192 is limited in the axial direction.
  • the second limiting portion 18 can be axially limited by the fifth step portion 141 of the rod assembly 14. In other embodiments, the second limiting member 18 may be a part of the rod assembly 14.
  • the annular sleeve 20 includes an outer extension portion 201 extending radially outward along the rod assembly 14 and a second cylindrical portion 202 extending axially along the rod assembly 14.
  • the second cylindrical portion 202 is sleeved In the first cylindrical portion 192, the outer diameter of the second limiting portion 18 is greater than the outer diameter of the second cylindrical portion 202, and the second flat portion 197 of the diaphragm portion 191 is clamped between the second limiting portion 18 and the extension portion
  • the outer extension 201 extending radially outward of the rod assembly 14 and the second limiting member 18 can increase the area of the clamped part of the sealing member 19, and further reduce the first cylindrical shape caused by pulling.
  • the deformation of the portion 192 also increases the area of the sealing surface, which can reduce the leakage at the second through hole 193.
  • the annular sleeve 20 further has a flared flaring or chamfer 203 at the junction of the extension portion 201 and the second cylindrical portion 202, and the flared flaring or chamfer 203 gradually expands toward the second limiting member 18.
  • the outer diameter of the first cylindrical portion 192 may be slightly larger than the inner diameter of the annular sleeve 20, and this flaring or chamfer can be sleeved into the annular sleeve on the first cylindrical portion 192
  • the inner side of the sleeve 20 plays a guiding role, so that the first cylindrical portion 192 can be inserted into the inner side of the annular sleeve 20 more easily.
  • This chamfer can be arc-shaped.
  • the annular sleeve 20 can be stamped and manufactured, and the cost is low.
  • the sealing member 19 further includes an annular protrusion 194 protruding from the inner side of the first cylindrical portion 192 toward the rod assembly 14 and surrounding the rod assembly 14.
  • the rod assembly 14 has an outer peripheral surface recessed in the rod assembly 14. And surround the annular groove 144 of the rod assembly 14.
  • the annular groove 144 corresponds to the annular protrusion 194. At least a part of the annular protrusion 194 extends into the annular groove 144 and the annular protrusion 194 abuts against the annular groove 144.
  • the first cylindrical portion 192 can be restricted in the axial direction, and the sealing performance can also be improved.
  • the rod assembly 14 may also have an annular protrusion that protrudes from the outer peripheral surface of the rod assembly 14 and surrounds the rod assembly 14, and the sealing member 19 has an inner surface recessed in the first cylindrical portion 192 and surrounds the rod assembly 14. At least a part of the annular protrusion extends into the annular groove, and the annular protrusion abuts against the annular groove.
  • the sealing member 19 also includes an annular sealing portion 195 located on the outer peripheral edge of the diaphragm portion 191.
  • the annular sealing portion 195 surrounds the first through hole 163 of the end cover 16, and the thickness of the annular sealing portion 195 is greater than that of the membrane.
  • the thickness of the connection between the sheet portion 191 and the annular sealing portion 195, the end cover 16 includes a first step portion 165, and the housing 26 includes a second step portion 263. Both the first step portion 165 and the second step portion 263 surround the first through hole 163.
  • the first stepped portion 165 and the second stepped portion 263 are disposed opposite to each other and form a accommodating cavity between the two.
  • the annular sealing portion 195 is located between the first stepped portion 165 and the second stepped portion 263 and is in a compressed state, which can reduce The fluid leaking into the rotor assembly 10 from the first cavity 1 through the outer peripheral edge of the sealing member 19, the annular sealing portion 195 can also reduce the flow from the first cavity 1 to the outer and/or stator assembly via the end cover 16 and the housing 26. Fluid leaked at location 31.
  • the first flat portion 196 is clamped between the first step portion 165 and the second step portion 263. The first flat portion 196 can be in a compressed state, which can further reduce leakage.
  • the sealing arrangement of the outer peripheral side of the diaphragm portion 191 of the sealing member 19 and at least one of the housing 26 and the end cover 16 can reduce the access from the first cavity 1 to the outside and/or between the end cover 16 and the housing 26.
  • the diaphragm portion 191 can expand and contract without affecting the up and down movement of the rod assembly 14 connected to the sealing member 19.
  • the outer periphery of the diaphragm portion 191 is also provided with an annular sealing portion 195 to be compressed between the end cover 16 and the housing 26 to indirectly realize the sealing between the diaphragm portion 191 and the end cover 16, the housing 26.
  • the outer peripheral side of the diaphragm portion 191 may be directly connected and sealed with the end cover 16 and the housing 26.
  • the end cap 16 includes a third stepped portion 164, the third stepped portion 164 corresponds to the fourth stepped portion 264 of the housing 26, the third stepped portion 164 and the fourth stepped portion 264 are disposed oppositely and both A accommodating cavity is formed between.
  • the electric valve further includes an annular seal 17, which is arranged between the third step portion 164 and the fourth step portion 264 and is in a compressed state, and the third step portion 164 is away from the first cavity 1 relative to the first step portion 165. .
  • the ring seal 17 can reduce the external leakage of the first cavity 1 and form a double seal with the ring seal 195.
  • the end cover 16 can be welded and fixed with the housing 26 and the joint is sealed, and the welding and fixing can further reduce the external leakage of the first cavity 1.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Sealing Devices (AREA)
  • Details Of Valves (AREA)

Abstract

一种电动阀，包括壳体（26）和端盖（16），壳体（26）内具有第一腔（1）和阀口（265），电动阀还包括转子组件（10）、杆组件（14）和阀芯组件（33），转子组件（10）与杆组件（14）的一端连接，杆组件（14）的另一端与阀芯组件（33）连接。电动阀还包括密封部件（19），密封部件（19）相对阀芯组件（33）远离阀口（265）。密封部件（19）包括第一筒形部（192）、膜片部（191）和环形密封部（195），通过设置密封部件（19），第一筒形部（192）相对杆组件（14）连接且连接处密封，并且密封部件（19）的膜片部（191）的外周侧与壳体（26）和/或端盖（16）连接且连接处密封设置，环形密封部（195）夹持于端盖（16）与壳体（26）之间，环形密封部（195）处于压缩状态，可较好的防止流体与转子组件（10）接触，可以防止流体腐蚀转子组件（10）。

Description

一种电动阀
本申请要求于2019年12月09日提交中国专利局、申请号为201911250887.9、发明名称为“一种电动阀”，以及于2019年12月09日提交中国专利局、申请号为201911250889.8、发明名称为“一种电动阀”两件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
本发明涉及流量调节技术领域，尤其涉及一种电动阀。
背景技术
电动阀可以广泛应用于流体介质管路系统中，可用于调节介质流量。以电动阀在汽车领域的应用为例，电动阀可以使用于空调系统、发动机冷却系统、电池冷却系统或者燃料供应系统。
在电动阀中包括可以相对壳体活动的阀芯部件，阀芯部件由驱动部带动，在一些电动阀的应用中，流体会侵蚀驱动部，需要防止阀腔的流体内漏至驱动部。
发明内容
本方案公开一种电动阀，包括壳体和端盖，壳体内具有第一腔和阀口，电动阀还包括转子组件、杆组件和阀芯组件，转子组件与杆组件的一端连接，杆组件的另一端与阀芯组件连接；电动阀还包括密封部件，密封部件 相对阀芯组件远离阀口；
密封部件包括第一筒形部、膜片部，第一筒形部具有第二通孔，杆组件的另一部分穿过第二通孔，第一筒形部相对杆组件连接且连接处密封，所述膜片部的外周侧与所述壳体和/或端盖密封设置。
通过设置密封部件，第一筒形部相对杆组件连接且连接处密封，膜片部的外周侧与壳体和/或端盖密封，可较好的防止流体与转子组件接触，可以防止流体腐蚀转子组件。而且，膜片部的设置不影响杆组件的上下移动。
一种具体方案中，所述密封部件还包括环形密封部，所述膜片部位于所述环形密封部和所述第一筒形部之间；所述环形密封部夹持于所述端盖与壳体之间，所述环形密封部处于压缩状态，可以较好地实现密封部件与盖体、壳体处的密封。
附图说明
图1示出了本发明的一种实施方式的主视示意图；
图2示出了图1所示电动阀沿E-E线的局部剖视示意图；
图3示出了图2所示电动阀的局部放大示意图；
图4示出了图2所示密封部件的剖视示意图；
图5示出了图2所示电动阀的一部分的爆炸示意图；
图6示出了图2所示电动阀的局部放大示意图。
具体实施方式
下面结合附图对实施例进行具体说明。
如图2所示，电动阀包括壳体26和端盖16，壳体26内具有第一腔1和阀口265，电动阀还包括杆组件14和阀芯组件33。杆组件14一端与阀芯组件33连接，杆组件14的另一端与转子组件10连接，杆组件14和阀芯组件33可以在杆组件14的延伸方向上下活动，从而打开或封闭阀口265。壳体26包括第一通道261和第二通道262，第一通道261与第一腔1连通，阀口265能够连通第二通道262与第一腔1。
如图2所示，电动阀还包括线圈组件31和套筒3。套筒3与端盖16固定且连接处密封设置，套筒3内侧形成第二腔36，转子组件10的至少一部分设置于第二腔36内。线圈组件31套设于套筒3。端盖16包括贯穿端盖16的第一通孔163。杆组件14的一部分穿过端盖16的第一通孔163并与转子组件10传动连接。杆组件14与第一通孔163所对应的内壁滑动配合。转子组件10还包括丝杆8和永磁体4，螺母部件12套设于丝杆8外围，螺母部件12和丝杆8通过螺纹配合，螺母部件12与端盖16固定，丝杆8可以相对于螺母部件12向上或向下运动，丝杆8可以带动杆组件14运动。杆组件14和丝杆8之间设置有弹性元件11。
电动阀的第一通道261与第二通道262可以接入具有较高压力的燃料电池系统的管路中，为防止第一腔1内较高的压力的流体进入转子组件10部分或者降低外漏风险，如图2至图4所示，电动阀还包括密封部件19，密封部件19相对阀芯组件33远离阀口265，密封部件19包括第一筒形部192和环形的膜片部191，第一筒形部192位于膜片部191的内周侧，第一筒形部192包括第二通孔193，杆组件14的另一部分穿过密封部件19的第二通孔193并与阀芯组件33连接，膜片部191的外周侧与壳体26和端 盖16连接且连接处密封设置。密封部件19可为橡胶材质或者金属材质，密封部件19具有弹性。如图4所示，膜片部191包括与环形密封部195连接的第一平整部196、与第一筒形部192连接的第二平整部197、以及位于第一平整部196和第二平整部197之间的波纹部198，波纹部198可在外力作用下产生伸缩的效果，以适应杆组件14的上下活动。如图2至图4所示，密封部件19与杆组件14接触的部分相对于杆组件14不动，密封部件19与壳体26接触的部分相对于壳体26不动，相对于采用动密封，采用静密封可降低泄漏风险。在其它实施方式中，膜片部191的外周侧可仅与壳体26或端盖16连接且连接处密封设置。
如图3和图4所示，电动阀还包括环形套20，环形套20环绕于第一筒形部192的外周并环绕第二通孔193，第一筒形部192包括外壁部和位于第二通孔193内侧的内壁部，内壁部与外壁部位于第一筒形部192的内外两侧，环形套20与第一筒形部192的外壁部过盈配合，环形套20可对第一筒形部192施加向杆组件14的压力，使得第一筒形部192与杆组件14外周之间较为紧密的贴合，可减少第二通孔193处的泄漏，进而可防止第一腔1内较高的压力的流体进入转子组件10部分，从而可以防止流体腐蚀转子组件10，也可以防止流体进入第二腔36后在低温下冻结导致转子组件10不能转动。
如图2至图3所示，电动阀还包括第一限位部件21，第一限位部件21位于环形套20远离第一通孔163的一端，第一限位部件21的至少一部分的外径大于环形套20的内径，第一限位部件21与环形套20抵靠，第一限位部件21与杆组件14固定，使得环形套20与第一限位部件21抵靠的一 端得到轴向限位。在本实施例中，第一限位部件21为挡圈，杆组件14具有凹陷于杆组件14外周表面的凹槽142，凹槽142与第一限位部件21对应，第一限位部件21的一部分伸入凹槽142，使得第一限位部件21在轴向方向上得到限位，第一限位部件21的另一部分沿杆组件14的径向向外延伸并与套筒20的一端抵接。挡圈可为E形挡圈，挡圈的内径可以变化，使得在安装时可以经过杆组件14的较粗的部分达到凹槽142处。在其它实施方式中，第一限位部件21也可为螺母，第一限位部件21可通过内部的螺纹固定于杆组件14。但挡圈的结构相对螺母结构更加简单，而且成本较低。在其它实施方式中，第一限位部件21也可以为杆组件14的一部分。
如图3所示，电动阀还包括第二限位部件18，第二限位部件18位于密封部件19靠近第一通孔163的一端，第二限位部件18的至少一部分的外径大于第二通孔193的直径，密封部件19与第二限位部件18相抵接。第二限位部件18与杆组件14固定连接或为一体结构。使得第一筒形部192的一端得到轴向方向的限位。第二限位部18可通过杆组件14的第五台阶部141轴向限位。在其它实施方式中，第二限位部件18可以为杆组件14的一部分。
如图3和图4所示，环形套20包括沿杆组件14径向向外延伸的外延部201和沿杆组件14轴向延伸的第二筒形部202，第二筒形部202套设于第一筒形部192，第二限位部18的外径大于第二筒形部202的外径，膜片部191的第二平整部197夹持于第二限位部18和外延部201之间，沿杆组件14径向向外延伸的外延部201与第二限位部件18可以增大密封部件19被夹持部分的面积，进一步减小因扯动而导致的第一筒形部192的变形， 同时也增加了密封面的面积，可减小第二通孔193处的泄漏。环形套20还具有位于外延部201和第二筒形部202连接处的喇叭状扩口或者倒角203，喇叭状扩口或倒角203朝向第二限位部件18逐渐扩大。在第一筒形部192外周未设置环形套20前，第一筒形部192的外径可略大于环形套20的内径，此扩口或者倒角可以在第一筒形部192套入环形套20内侧时起到导向作用，使得第一筒形部192更容易套入环形套20内侧。此倒角可为圆弧形。环形套20可冲压制造，成本较低。
如图3和图4所示，密封部件19还包括由第一筒形部192内侧向杆组件14突起且环绕杆组件14的环形突起部194，杆组件14具有凹陷于杆组件14的外周面并环绕杆组件14的环形凹槽144，环形凹槽144与环形突起部194相对应，环形突起部194的至少一部分伸入环形凹槽144且环形突起部194与环形凹槽144相抵接，不仅可使得第一筒形部192在轴向方向上得到限位，而且还能够提高密封性能。在未受到压力时环形突起部194突出于第一筒形部192内侧的高度大于环形凹槽144的深度，在第一筒形部192套设于杆组件14外周时环形突起部194可呈压缩状态，可相对减少第二通孔193处的泄漏。在其它实施方式中，杆组件14也可具有突出于杆组件14的外周面并环绕杆组件14的环形突起部，密封部件19具有凹陷于第一筒形部192的内侧面并环绕杆组件14的环形凹槽，环形突起部的至少一部分伸入环形凹槽，环形突起部与环形凹槽相抵接。
如图4和图6所示，密封部件19还包括位于膜片部191外周边缘的环形密封部195，环形密封部195环绕端盖16的第一通孔163，环形密封部195的厚度大于膜片部191与环形密封部195连接处的厚度，端盖16包括 第一台阶部165，壳体26包括第二台阶部263，第一台阶部165和第二台阶部263都环绕第一通孔163，第一台阶部165与第二台阶部263相对设置且两者之间形成容置腔，环形密封部195位于第一台阶部165和第二台阶部263之间且处于压缩状态，可减少从第一腔1经由密封部件19的外周边缘处进入转子组件10的流体泄漏，环形密封部195也可减少从第一腔1经由端盖16与壳体26之间达到外部和/或定子组件31部位的流体泄漏。第一平整部196夹持于第一台阶部165与第二台阶部263之间，第一平整部196可处于压缩状态，可进一步减小泄漏。
可知，密封部件19的膜片部191的外周侧和壳体26、端盖16的至少一者密封设置即可减少从第一腔1经由端盖16与壳体26之间达到外部和/或定子组件31部位的流体泄漏的目的，膜片部191又能够伸缩，不影响与密封部件19连接的杆组件14的上下移动。本实施例中，膜片部191的外周还设有环形密封部195，以压紧在端盖16与壳体26之间，间接实现膜片部191与端盖16、壳体26的密封，应当理解，膜片部191的外周侧直接和端盖16、壳体26实现连接密封也可以。
如图6所示，端盖16包括第三台阶部164，第三台阶部164与壳体26的第四台阶部264相对应，第三台阶部164与第四台阶部264相对设置且两者之间形成容置腔。电动阀还包括环形密封件17，环形密封件17设置于第三台阶部164与第四台阶部264之间且处于压缩状态，第三台阶部164相对于第一台阶部165远离第一腔1。环形密封件17可减少第一腔1的外部泄漏，与环形密封部195形成双重密封。端盖16可与壳体26焊接固定且连接处密封，采用焊接固定可进一步减小第一腔1的外部泄漏。

Claims (14)

  1. 一种电动阀，包括壳体(26)和端盖(16)，所述壳体(26)内具有第一腔(1)和阀口(265)，所述电动阀还包括转子组件(10)、杆组件(14)和阀芯组件(33)，所述转子组件(10)与所述杆组件(14)的一端连接，所述杆组件(14)的另一端与所述阀芯组件(33)连接；其特征在于，所述端盖(16)具有第一通孔(163)，所述杆组件(14)的一部分穿过所述第一通孔(163)且与所述第一通孔(163)所对应内壁滑动配合，所述电动阀还包括密封部件(19)，所述密封部件(19)相对所述阀芯组件(33)远离所述阀口(265)；
    所述密封部件(19)包括第一筒形部(192)和膜片部(191)，，所述第一筒形部(192)具有第二通孔(193)，所述杆组件(14)的另一部分穿过所述第二通孔(193)，所述第一筒形部(192)相对所述杆组件(14)连接且连接处密封，所述膜片部(191)的外周侧与所述壳体(26)和/或端盖(16)密封设置。
  2. 根据权利要求1所述的电动阀，其特征在于，所述密封部件(19)还包括环形密封部(195)，所述膜片部(191)位于所述环形密封部(195)和所述第一筒形部(192)之间；所述环形密封部(195)夹持于所述端盖(16)与壳体(26)之间，所述环形密封部(195)处于压缩状态，使所述膜片部(191)的外周侧与所述壳体(26)和端盖(16)密封设置。
  3. 根据权利要求1所述的电动阀，其特征在于，所述膜片部(191)的外周侧与所述壳体(26)和/或端盖(16)连接且连接处密封设置，所述第一筒形部(192)具有第二通孔(193)。
  4. 根据权利要求1所述的电动阀，其特征在于，所述杆组件(14)的另一部分穿过所述第二通孔(193)且所述第一筒形部(192)相对所述杆组件(14)固定或者限位。
  5. 根据权利要求1-4任一项所述的电动阀，其特征在于，所述密封部件(19)为橡胶材质，所述环形密封部(195)的厚度大于所述膜片部(191)与所述环形密封部(195)连接处的厚度。
  6. 根据权利要求1-4任一项所述的电动阀，其特征在于，所述密封部件(19)还包括由所述第一筒形部(192)内侧向所述杆组件(114)突起且环绕所述杆组件(14)的环形突起部(194)，所述杆组件(14)具有凹陷于所述杆组件(14)的外周并环绕所述杆组件(14)的环形凹槽(144)，所述环形凹槽(144)与所述环形突起部(194)相对应，所述环形突起部(194)的至少一部分伸入所述环形凹槽(144)，所述环形突起部(194)与所述环形凹槽(144)相抵接，所述环形突起部(194)呈压缩状态；或，所述密封部件具有凹陷于所述第一筒形部的内侧面并环绕所述杆组件的环形凹槽，所述杆组件具有突出于所述杆组件的外周并环绕所述杆组件的环形突起部，所述环形突起部的至少一部分伸入所述环形凹槽，所述环形突起部与所述环形凹槽相抵接。
  7. 根据权利要求1-4任一项所述的电动阀，其特征在于，所述电动阀还包括环形套(20)，所述环形套(20)的至少一部分套设于所述第一筒形部(192)，所述环形套(20)与所述第一筒形部(192)的外壁部过盈配合。
  8. 根据权利要求7所述的电动阀，其特征在于，所述电动阀还包括第一限位部件(21)，所述第一限位部件(21)位于所述环形套(20)远离所 述第一通孔(163)的一端，所述第一限位部件(21)的至少一部分的外径大于所述环形套(20)的内径，所述第一限位部件(21)的一部分与所述环形套(20)或者第一筒形部(192)抵靠，所述第一限位部件(21)与所述杆组件(14)固定或为所述杆组件(14)的一部分。
  9. 根据权利要求8所述的电动阀，其特征在于，所述电动阀还包括第二限位部件(18)，所述杆组件(14)穿过所述第二限位部件(18)，所述第二限位部件(18)位于所述密封部件(19)靠近所述第一通孔(163)的一端，所述第二限位部件(18)的至少一部分的外径大于所述第二通孔(192)的直径，所述第二限位部件(18)与所述杆组件(14)固定或为所述杆组件(14)的一部分，所述密封部件(19)与所述第二限位部件(18)相抵接。
  10. 根据权利要求2所述的电动阀，其特征在于，所述膜片部(191)包括与所述环形密封部(195)连接的第一平整部(196)、与所述第一筒形部(192)连接的第二平整部(197)、以及位于所述第一平整部(196)和第二平整部(197)之间的波纹部(198)。
  11. 根据权利要求1-4任一项所述的电动阀，其特征在于，所述膜片部(191)包括位于最外侧的第一平整部(196)、与所述第一筒形部(192)连接的第二平整部(197)、以及位于所述第一平整部(196)和第二平整部(197)之间的波纹部(198)
  12. 根据权利要求11所述的电动阀，其特征在于，所述电动阀还包括环形套(20)，所述环形套(20)的至少一部分套设于所述第一筒形部(192)，所述环形套(20)与所述第一筒形部(192)的外壁部过盈配合；
    所述环形套(20)包括沿所述杆组件(14)径向延伸的外延部(201)和沿所述杆组件(14)轴向延伸的第二筒形部(202)，所述第二限位部件(18)的外径大于所述第二筒形部(202)的外径，所述膜片部(191)的第二平整部(197)夹持于所述第二限位部(18)和所述外延部(201)之间。
  13. 根据权利要求10所述的电动阀，其特征在于，所述端盖(16)包括第一台阶部(165)，所述壳体(26)包括第二台阶部(263)，所述第一台阶部(165)与所述第二台阶部(263)相对设置且所述第一台阶部(165)与所述第二台阶部(263)之间形成容置腔，所述环形密封部(195)位于所述容置腔，所述第一平整部(196)夹持于所述第一台阶部(165)与所述第二台阶部(263)之间，所述第一平整部(196)处于压缩状态。
  14. 根据权利要求1-13任一权利要求所述的电动阀，其特征在于，所述电动阀包括套筒(3)，所述套筒(3)与所述端盖(16)固定且连接处密封设置，所述套筒(3)内具有第二腔(36)，所述转子组件(10)位于所述第二腔(36)内；所述第一通孔(163)的一端与所述第一腔(1)连通，所述第一通孔(192)的另一端与所述第二腔(36)连通。
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