WO2022161429A1 - 一种电动阀 - Google Patents

一种电动阀 Download PDF

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Publication number
WO2022161429A1
WO2022161429A1 PCT/CN2022/074247 CN2022074247W WO2022161429A1 WO 2022161429 A1 WO2022161429 A1 WO 2022161429A1 CN 2022074247 W CN2022074247 W CN 2022074247W WO 2022161429 A1 WO2022161429 A1 WO 2022161429A1
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WO
WIPO (PCT)
Prior art keywords
valve
valve core
abutting
elastic member
abutment
Prior art date
Application number
PCT/CN2022/074247
Other languages
English (en)
French (fr)
Inventor
魏先让
Original Assignee
浙江三花智能控制股份有限公司
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 浙江三花智能控制股份有限公司 filed Critical 浙江三花智能控制股份有限公司
Publication of WO2022161429A1 publication Critical patent/WO2022161429A1/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
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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

  • CN109723884A discloses an electric valve
  • the electric valve has a guide bush 20, a valve shaft holder 30, the guide bush 20 is provided with a fixed external thread portion 23, and the valve shaft holder 30 is provided with a movable
  • the female screw portion 33 , the fixed male screw portion 23 and the movable female screw portion 33 constitute the screw feeding mechanism 28 of the electric valve.
  • the valve body of the electric valve is mainly composed of three parts.
  • the valve shaft 10 of this electric valve is sandwiched between the stepped surface 13 formed between the upper small diameter portion 11 and the lower large diameter portion 12 of the valve shaft 10 and the lower surface of the top portion 32 of the valve shaft holder 30 .
  • a compression coil spring (biasing member) 60 is compressed and arranged on a disc-shaped pressing plate 61 on the lower surface side of the top portion 32 of the valve shaft holder 30 so as to be externally inserted into the upper small-diameter portion 11 of the valve shaft 10 .
  • the compression coil spring 60 urges the valve shaft 10 and the valve shaft holder 30 to move away from each other in the ascending and descending direction (axis O direction). In other words, the compression coil spring 60 always urges the valve shaft 10 ( The valve body 14) is urged downward (in the valve closing direction).
  • the object of the present invention is to provide an electric valve, including a valve body and a coil, the coil is sleeved on the valve body, the valve body includes a valve seat part and a valve core rotor assembly, and the valve core rotor assembly includes a valve a shaft assembly, a valve core portion, a first elastic member, a second elastic member, and an abutting member;
  • valve shaft assembly includes a valve shaft abutment
  • valve core part includes a first valve core abutting part, the first valve core abutting part can abut against the valve shaft abutting part;
  • the upper end portion of the first elastic member abuts against the valve shaft assembly
  • the abutting member includes a first abutting portion
  • the lower end portion of the first elastic member abuts against the first abutting portion
  • the The abutting member includes a second abutting portion
  • the valve body member includes a second valve body abutting portion
  • the second abutting portion can abut the second valve body abutting portion
  • the abutting member includes a third abutting part, the third abutting part can abut against the valve shaft assembly;
  • the first elastic member is sleeved on the second elastic member, the upper end of the second elastic member abuts against the valve shaft assembly, the abutting member includes a hole portion of the abutting member, and the valve core member or The second elastic member passes through the hole of the contact member, the valve core member includes a third valve core contact portion, and the lower end portion of the second elastic member abuts against the third valve core contact portion ;
  • the valve seat part includes a valve port, and the valve core part can abut against the valve port;
  • the elastic force of the first elastic member is absorbed by the valve shaft assembly Bearing, the elastic force of the abutting member subjected to the first elastic member is greater than the elastic force of the valve core member to the second elastic member.
  • the first elastic member when the third abutting portion abuts against the valve shaft assembly and the first valve core abutting portion abuts against the valve shaft abutting portion, the first elastic member
  • the elastic force of the valve is carried by the valve shaft assembly, and the elastic force of the abutting part by the first elastic member is greater than the elastic force of the valve core part by the second elastic member, which can reduce the moment when the valve core and the valve port contact. The impact force of the valve core on the valve port.
  • FIG. 1 is a sectional view of the electric valve of the present invention in a fully closed state
  • Fig. 2 is the structural representation of the electric valve seat part of the present invention.
  • Fig. 3a is a schematic structural diagram of the rotor component when the electric valve of the present invention is in a fully closed state
  • Fig. 3b is a partial enlarged view of Fig. 3a;
  • Fig. 4a is a sectional view of the valve body when the electric valve of the present invention is opened until the valve core just does not bear the elastic force of the first elastic member
  • Fig. 4b is a partial enlarged view of Fig. 4a;
  • Fig. 5a is a sectional view of the valve body when the electric valve of the present invention is opened until the head of the valve core just does not contact the valve port
  • Fig. 5b is a partial enlarged view of Fig. 5a;
  • Fig. 6a is a sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree
  • Fig. 6b is a partial enlarged view of Fig. 6a;
  • Fig. 7a is a sectional view of the valve body when the electric valve of the present invention is over-opened until the screw pair is disengaged and screwed together
  • Fig. 7b is a partial enlarged view of Fig. 7a;
  • Fig. 8a is a sectional view of the valve body when the second embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • Fig. 8b is a partial enlarged view of Fig. 8a;
  • Fig. 9a is a sectional view of the valve body when the third embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • Fig. 9b is a partial enlarged view of Fig. 9a;
  • Fig. 10a is a sectional view of the valve body when the fourth embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • Fig. 10b is a partial enlarged view of Fig. 10a;
  • Fig. 11a is a sectional view of the valve body when the fifth embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • Fig. 11b is a partial enlarged view of Fig. 11a;
  • Fig. 12a is a sectional view of the valve body when the sixth embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • Fig. 12b is a partial enlarged view of Fig. 12a;
  • Fig. 13a is a sectional view of the valve body when the electric valve of the seventh embodiment of the present invention is in a fully closed state
  • Fig. 13b is a partial enlarged view of Fig. 13a.
  • Fig. 14a is a sectional view of the valve body when the electric valve of the eighth embodiment of the present invention is in a fully closed state
  • Fig. 14b is a partial enlarged view of Fig. 14a.
  • Fig. 15a is a sectional view of the valve body when the electric valve of the ninth embodiment of the present invention is opened to the maximum opening degree
  • Fig. 15b is a partial enlarged view of Fig. 15a.
  • Fig. 16a is a sectional view of the valve body when the electric valve of the tenth embodiment of the present invention is in a fully closed state
  • Fig. 16b is a partial enlarged view of Fig. 16a.
  • Fig. 17a is a sectional view of the valve body when the electric valve of the eleventh embodiment of the present invention is opened to the maximum opening degree
  • Fig. 17b is a partial enlarged view of Fig. 17a.
  • Fig. 18a is a sectional view of the valve body when the electric valve of the twelfth embodiment of the present invention is opened to the maximum opening degree
  • Fig. 17b is a partial enlarged view of Fig. 17a;
  • Figures 1-19 include the following reference numerals:
  • valve seat part 101 valve seat; 102 nut; 103 first pipe part; 104 second pipe part; 10a valve port; 10b internal thread part; 10c fixed stop part; 10d first access channel; 10e second access channel ; 20 valve core rotor assembly; 201 valve shaft assembly; 2011 valve shaft; 2012 bushing; 20121 bushing hole; 2013 valve shaft main body; Hole; 2015 valve shaft inner wall; 20151 first valve shaft inner wall; 20152 step part; 20153 second valve shaft inner wall; 20154 valve shaft abutting part; 20155 third valve shaft inner wall; 2016 outer edge; 20161 20162 second outer edge part; 201a external thread part; 201b movable stop part; 201c rotor fixing part; 202 valve core part; 2021 valve core body part; 202a valve core head; 202b first valve core contact part; 202c second valve core contact part; 202d third valve core contact part; 202e steel ball accommodation part; 2024 steel ball; 203 rotor; 204 205 ejector rod; 2051
  • Fig. 1 is a sectional view of the electric valve of the present invention in a fully closed state
  • Fig. 2 is a schematic structural diagram of the valve seat component of the electric valve of the present invention
  • Fig. 3a is a view of the electric valve of the present invention in a fully closed state Schematic diagram of the structure of the rotor part
  • Fig. 3b is a partial enlarged view of Fig. 3a
  • Fig. 4a is a sectional view of the valve body when the electric valve of the present invention is opened until the valve core just does not bear the elastic force of the first elastic member
  • Fig. 4b is a partial enlarged view of Fig.
  • FIG. 4a 5a is a sectional view of the valve body when the electric valve of the present invention is opened to the head of the spool that just does not contact the valve port, and FIG. 5b is a partial enlarged view of FIG. 5a;
  • Figure 6b is a partial enlarged view of Figure 6a;
  • Figure 7a is a cross-sectional view of the valve body when the electric valve of the present invention is over-opened to when the screw pair is disengaged and screwed, and
  • Figure 7b is a partial enlarged view of Figure 7a;
  • the electric valve provided by the present invention includes a valve body and a coil 40, the coil 40 is sleeved on the valve body, and the valve body includes a valve core rotor assembly 20 (FIG. 3a, 3b), the valve seat member 10 (shown in Figure 2) and the housing 30 (shown in Figure 1).
  • the coil 40 of the electric valve is connected to the drive controller. After the drive controller is energized, a pulse drive signal is sent to the coil 40, and the coil 40 generates a changing magnetic field, thereby driving the spool rotor assembly 20 of the electric valve to rotate forward or reverse.
  • the outer casing 30 is open, the outer casing 30 is a thin-walled part, and is in the shape of a shell, and the open side of the lower end of the outer casing 30 is hermetically welded with the valve seat member 10, thereby forming an accommodating chamber that can accommodate the nut 102 (which will be shown below). mentioned) and the main body of the spool rotor assembly 20 (mentioned below).
  • the valve core rotor assembly 20 includes a valve shaft assembly 201.
  • the valve shaft assembly 201 includes a valve shaft 2011 and a bushing 2012.
  • the bushing 2012 is fixed at the substantially upper end position of the valve shaft 2011,
  • the bushing 2012 includes bushing hole portions 20121 penetrating the upper and lower surfaces thereof.
  • the valve shaft 2011 is provided with a male screw portion 201a.
  • the valve seat part 10 includes a nut 102, the inner hole of the nut 102 is provided with an internal thread portion 10b, the valve shaft 2011 is threadedly matched with the nut 102, while the valve core rotor assembly 20 rotates, the valve shaft 2011 will move along the shaft The displacement movement occurs in the direction, so that the valve core member 202 can be driven to realize the opening and closing action of the valve port 10a.
  • the valve seat member 10 has a valve port 10a, a first inlet and outlet passage 10d and a second inlet and outlet passage 10e, and the valve port 10a can communicate with the first inlet and outlet passages 10d and the second inlet and outlet passages 10e, so as to allow fluid
  • a through hole penetrating up and down is provided at a substantially central position of the valve seat member 10 through which a medium (eg, a refrigerant) passes, and an internal thread portion 10b (also referred to as a fixed thread portion) is provided on the inner wall of the through hole.
  • the screw feed mechanism (screw pair) of the electric valve is constituted by the combination of 10b and the male screw portion 201a (may also be referred to as a movable screw portion) provided at a substantially lower position of the valve shaft 2011 .
  • the valve seat member 10 includes a nut 102, the nut 102 is provided with a through hole, and the inner wall of the through hole of the nut 102 is provided with an internal thread portion 10b, and the valve seat member 10 further includes a valve seat 101, and the part of the nut 102 is located in Inside the valve seat 101, and the nut 102 is fixedly connected with the valve seat 101 (for example, the connecting body is used as an insert and integrally injection-molded with the nut 102, and then the connecting body is fixedly connected with the valve seat 101 by welding or press-fitting, or directly The nut 102 and the valve seat 101 are press-fitted and fixed.
  • connection between the nut 102 and the valve seat 101 is realized by the connecting body as an insert and the nut 102 being integrally injection-molded, and the connecting body and the valve seat 101 being welded and fixed. (fixed connection), the valve seat 101 is integrally formed with the valve port 10a (of course, the valve port 10a can also be formed on other components, and then the component is fixedly connected to the valve seat 101).
  • the valve The seat 101 is fixedly connected with the first connecting pipe part 103 and the second connecting pipe part 104.
  • the first connecting pipe part 103 and the second connecting pipe part 104 are used as the inflow or outflow channel of the fluid medium of the electric valve, which are installed in the refrigeration and heating systems such as air conditioners. When it is used, it is generally used to connect with the system pipeline.
  • first connecting pipe portion 103 and the second connecting pipe portion 104 are connected to the valve seat 101 by welding.
  • first connecting pipe portion 103 and the second connecting pipe portion 104 may not be provided, but a refrigerant fluid may be used.
  • the flow path passing through is directly set on the valve seat 101, or the first connecting pipe part 103 or the second connecting pipe part 104 can also be connected by flange sealing. the occasion.
  • the electric valve is provided with the first nozzle portion 103 and the second nozzle portion 104 as an example for illustration.
  • the nut 102 protrudes from the annular base body and is provided with a fixed stopper 10c, which cooperates with the movable stopper 201b provided on the spool rotor assembly 20 to constitute the lower end of the stroke of the electric valve.
  • the stop mechanism that is, when the valve core rotor assembly 20 moves downward relative to the valve seat member 10 to a certain extent, the movable stop part 201b can abut against the fixed stop part 10c to limit the relative movement of the valve core rotor assembly 20 to the valve seat part 10 .
  • the rotation of the valve seat member 10 restricts the downward movement of the valve core rotor assembly 20 in the axial direction, so that the downward movement stroke of the valve core rotor assembly 20 can be controlled.
  • the valve core rotor assembly 20 further includes a rotor 203 and a valve core part 202, the rotor 203 is provided with magnetic poles in the circumferential direction, the valve core part 202 passes through the central through hole of the valve shaft 2011, in addition, the valve core
  • the rotor assembly 20 further includes a first elastic member 208 and a second elastic member 204 disposed in the central through hole of the valve shaft 2011 , the first elastic member 208 is sheathed on the second elastic member 204 , and the The top rod 205 provided at the upper end.
  • the top rod 205 includes a top rod main body portion 2051 and a top rod abutting portion 2052 , and the top rod abutting portion 2052 is substantially a structure formed by the circumferential extension of the top rod main body portion 2051 .
  • the push rod abutting portion 2052 is located below the bushing 2012 , and a portion of the push rod main body portion 2051 protrudes from the bushing hole portion 20121 , which can abut against the housing 30 .
  • the push rod abutting portion 2052 is located at the inner edge of the first elastic member 208 , and the upper end of the first elastic member 208 abuts against the bushing 2012 , and its elastic load does not act on the push rod 205 all the time.
  • the ejector main body 2051 includes a first ejector main body 20511 and a second ejector main body 20522 , and the first ejector main body 20511 is substantially located at the ejector abutting portion 2052 Above, the second ejector rod main body portion 20512 is located approximately below the ejector rod abutting portion 2052, and a part of the first ejector rod main body portion 20511 can pass through the bushing hole portion 20121.
  • the second mandrel main body 20512 extends into the inner edge of the upper end opening of the second elastic member 204 , that is, the second elastic member 204 is sheathed on the second mandrel main body 20512 , which can reduce the deflection of the second elastic member 204 .
  • the lower end of the first elastic member 208 abuts against the abutting member 206 (which will be mentioned below), and the upper end of the first elastic member 208 abuts against the bushing 2012 , including the upper end of the first elastic member 208 and the bushing 2012 directly abuts against, such as the form in this embodiment, also includes indirect abutment between the upper end of the first elastic member 208 and the bushing 2012, for example, the upper end of the first elastic member 208 directly abuts against the push rod abutting portion 2052, and is in direct contact with the bushing 2012.
  • Set of 2012 indirect offset forms The lower end of the second elastic member 204 abuts against the valve core member 202 , and the upper end of the second elastic member 204 abuts against the push rod abutting portion 2052 of the push rod 205 .
  • the upper end opening of the first elastic member 208 is sleeved on the top rod abutting portion 2052 , that is, the top rod abutting portion 2052 is located in the upper end opening of the first elastic member 208 .
  • the upper end of an elastic member 208 wants to be radially displaced, it can be restricted by the abutting portion 2052 of the push rod, so that the deflection of the first elastic member 208 can be reduced, and the first elastic member 208 and the second elastic member 208 can be reduced. The situation where the elastic pieces 204 are stuck together.
  • the lower end of the second elastic member 204 abuts against the valve core member 202 , and the upper end of the second elastic member 204 abuts against the push rod abutting portion 2052 of the push rod 205 .
  • the electric valve provided in this embodiment includes a spring abutting portion 20a
  • the spring abutting portion 20a is roughly where the valve shaft assembly 201 abuts the upper end of the first elastic member 208 and the upper end of the second elastic member 204 (including directly abutting or indirectly abutting, in this embodiment, the first elastic member 208 and the bushing 2012 are directly abutting, and the second elastic member 204 and the bushing 2012 are indirectly abutting through the push rod abutting portion 2052), the first The elastic load of the elastic member 208 and the second elastic member 204 can be directly or indirectly transmitted to the bushing 2012, and the bushing 2012 is subjected to the elastic load of the first elastic member 208 and the second elastic member 204.
  • the second elastic members 204 are abutted against each other.
  • the bushing 2012 includes a spring abutting portion 20a.
  • the valve shaft 2011 includes a vertical through hole, the inner wall of the through hole substantially forms the valve shaft inner wall portion 2015, in the axial direction of the valve shaft 2011, the inner diameter of the valve shaft inner wall portion 2015 It is not the same.
  • the valve shaft inner wall portion 2015 includes a first valve shaft inner wall portion 20151, a stepped portion 20152, a second valve shaft inner wall portion 20153, a valve shaft abutting portion 20154 and a third valve shaft inner wall portion 20155.
  • the inner wall portion 20151 of the first valve shaft is located above the inner wall portion 20153 of the second valve shaft
  • the inner wall portion 20153 of the second valve shaft is located above the inner wall portion 20155 of the third valve shaft, and is located above the inner wall portion 20155 of the valve shaft 2011.
  • the orthographic projection of the inner wall portion 20151 of the first valve shaft along this plane is located on the orthographic projection of the inner wall portion 20153 of the second valve shaft along this plane (the orthographic projection is Outside the closed line or annulus), the orthographic projection of the second valve shaft inner wall portion 20153 along the plane (the orthographic projection is a closed line or annulus) is located at the orthographic projection of the third valve shaft inner wall portion 20155 along the plane (the orthographic projection is a closed line or annulus).
  • the orthographic projection is a closed line or annulus), usually for the convenience of processing, the cross-sections of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153, and the third valve shaft inner wall portion 20155 are all set to be circular.
  • the diameter of the inner wall portion 20151 of the first valve shaft is larger than the diameter of the inner wall portion 20153 of the second valve shaft
  • the diameter of the inner wall portion 20153 of the second valve shaft is larger than the diameter of the inner wall portion 20155 of the third valve shaft.
  • valve shaft inner wall 20151, the second valve shaft inner wall 20153, and the third valve shaft inner wall 20155 are all equal in diameter in the height direction, so the first valve shaft inner wall 20151, the second valve shaft inner wall 20153 and the third valve
  • the orthographic projection of the shaft inner wall portion 20155 along the plane where the cross section of the valve shaft 2011 is located is a circle.
  • the stepped portion 20152 and the valve shaft abutting portion 20154 have an extension distance in the horizontal direction.
  • the stepped portion 20152 is located above the valve shaft abutting portion 20154, and the outer edge of the stepped portion 20152 is connected to the first
  • the valve shaft inner wall portion 20151 intersects, the inner edge intersects the second valve shaft inner wall portion 20153, the outer edge of the valve shaft abutting portion 20154 intersects the second valve shaft inner wall portion 20153, and the inner edge intersects the third valve shaft inner wall portion 20155,
  • the cross sections of the first valve shaft inner wall portion 20151 , the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155 are all set to be circular
  • the stepped portion 20152 and the valve shaft abutting portion 20154 are along the cross section of the valve shaft 2011
  • the orthographic projection of the plane on which the plane is located is circular.
  • the stepped portion 20152 and the valve shaft abutting portion 20154 are in the horizontal direction.
  • the stepped portion 20152 and the valve shaft abutting portion 20154 can also be set to be incomplete In a horizontal form, for example, in the direction away from the axis of the valve shaft 2011, the valve shaft abutting portion 20154 gradually extends upward or downward (the same is true for the step portion 20152). It can be understood that the step portion 20152 and the valve shaft abutting portion 20154 It only needs to have an extension distance in the horizontal direction.
  • the valve shaft 2011 includes an outer edge portion 2016, the outer edge portion 2016 includes a first outer edge portion 20161 and a second outer edge portion 20162, and the first outer edge portion 20161 is located at the second outer edge portion 20161.
  • the orthographic projection of the first outer edge portion 20161 along the plane is located outside the orthographic projection of the second outer edge portion 20162 along the plane.
  • the cross sections of the first outer edge portion 20161 and the second outer edge portion 20162 are both set to be circular, and the portion of the valve shaft 2011 where the first outer edge portion 20161 is located is provided with a rotor fixing portion 201c, the rotor 203 and the rotor fixing portion 201c It can be fixed by direct or indirect welding, riveting, magnetic plastic material injection connection, glue bonding, etc.
  • the connecting piece is used as the insert to connect with the magnetic plastic material injection molding, and then the valve shaft 2011 and the connecting piece pass through The connection is fixed by welding.
  • the valve shaft 2011 can also be used as an insert to be integrally connected with the magnetic plastic material by injection molding.
  • the position of the valve shaft 2011 where the second outer edge portion 20162 is located is provided with an external thread portion 201a, the external thread portion 201a (also referred to as a movable thread portion), and the internal thread portion 201a provided in the inner hole portion of the nut 102.
  • the screw portion 10b (also referred to as a fixed screw portion) in combination constitutes a screw feed mechanism (screw pair) of the electric valve.
  • the electric valve of this embodiment includes a first elastic member 208 and a second elastic member 204.
  • the first elastic member 208 and the second elastic member 204 can be designed as cylindrical coil springs.
  • the first elastic member 208 and the second elastic member 204 The two elastic members 204 are located in the valve shaft assembly 201 , the cylindrical outer diameter of the first elastic member 208 is slightly smaller than the diameter of the inner wall portion 20151 of the first valve shaft, and the inner edge diameter of the first elastic member 208 is larger than the cylindrical outer diameter of the second elastic member 204 path.
  • the second elastic member 204 is placed in the first elastic member 208 , that is, the second elastic member 204 is nested in the inner diameter hole of the first elastic member 208 , and the first elastic member 208 is sheathed on the second elastic member 204 . Because the second elastic member 204 can be nested in the inner diameter hole of the first elastic member 208, the electric valve of the structure of the present invention can effectively reduce the height dimension of the electric valve compared with the background art, which is beneficial to save the electric valve in the related art. Installation space in the device.
  • the valve core member 202 is inserted through the valve shaft 2011 (the valve core member 202 is located in the inner wall portion 2015 of the valve shaft), in addition, the valve core member 202 has a stepped shaft-shaped structure, It includes a valve core head 202a, the valve core head 202a is located at the approximate lower end position of the valve core part 202, the tip shape of the valve core head 202a is related to the flow regulation curve required by the electric valve, and the valve core part 202 also includes a first The valve core abutting portion 202b and the first valve core contact portion 202b are located at a position substantially close to the upper end of the valve core member 202.
  • the valve core head portion 202a is along the The orthographic projection of the plane is located in the orthographic projection of the first valve core abutting portion 202b along the plane.
  • the diameter of the valve core abutting portion 202b is larger than the diameter of the valve core head portion 202a.
  • the valve core member 202 is inserted into the valve shaft inner wall portion 2015 of the valve shaft 2011 from top to bottom.
  • the valve body abutting portion 202b can abut against the valve shaft abutting portion 20154, and the valve body head portion 202a protrudes from the third valve shaft inner wall portion 20155.
  • the orthographic projection of the first valve core abutting portion 202b along the plane and the orthographic projection of the valve shaft abutting portion 20154 along the plane have an overlapping area. Therefore, the first valve core contacting The connecting portion 202b can abut against the valve shaft abutting portion 20154 (of course, when a gasket and other components are provided between the valve shaft abutting portion 20154 and the first valve core abutting portion 202b to prevent them from directly abutting, the first valve core abutting
  • the projection relationship between the part 202b and the valve shaft abutting part 20154 may not satisfy the above relationship), in this embodiment, the outer edge of the first valve core abutting part 202b, the cross-sectional shape of the second valve shaft inner wall part 20153, the third valve
  • the cross-sectional shape of the shaft inner wall portion 20155 is circular, and the diameter of the first valve core abutting portion 202b is slightly smaller than the diameter of
  • the diameter of the inner wall portion 20155 and the largest diameter of the valve core head portion 202a are slightly smaller than the diameter of the third valve shaft inner wall portion 20155. At this time, the valve core member 202 can be supported on the valve shaft abutting portion 20154 of the valve shaft 2011.
  • the electric valve provided by the present application further includes an abutment member 206, the abutment member 206 includes a first abutment portion 206a, and the lower end of the first elastic member 208 abuts against the first abutment portion 206a, abutting against the first abutting portion 206a.
  • the component 206 further includes a second abutting portion 206b, which can abut against the second valve core abutting portion 202c (mentioned below), and the abutting component 206 further includes a third abutting portion 206c, a third abutting portion 206c.
  • the abutting portion 206c can abut against the valve shaft assembly 201 (step portion 20152 in this embodiment), the abutting member 206 further includes an abutting member hole portion 206d, and the valve core member 202 further includes a third valve core abutting portion 202d , the lower end of the second spring 204 and the third valve core contact portion 202d of the valve core member 202 can abut through the contact member hole portion 206d, and the second elastic member 204 or the third valve core contact portion 202d. is located in the abutment member hole portion (206d); for example, the second spring 204 or the valve needle member 202 is used to pass through the abutment member hole portion 206d. In this embodiment, the valve needle member 202 is used to pass through the abutment member.
  • the form of the component hole portion 206d is used to pass through the abutment member.
  • the abutting member 206 is a washer member 2061, and the washer member 2061 can abut against the step portion 20152 (in the fully closed state in Figs. 3a and 3b, the washer member 2061 and the step portion 20152 In the non-contact state), specifically, in the plane where the cross-section of the electric valve is located, the orthographic projection of the gasket member 2061 along the plane and the orthographic projection of the stepped portion 20152 along the plane have an overlapping area, therefore, the gasket member 2061 (Of course, when two or more gasket parts 2061 are provided, it is not necessary that each gasket part 2061 and the stepped part 20152 satisfy the above relationship), in this embodiment, the gasket part 2061 Both the outer edge and the inner edge of the stepped portion 20152 are circular, and the outer diameter of the gasket member 2061 is larger than the diameter of the inner wall portion 20153 of the second valve shaft, which is slightly smaller than the diameter of the inner wall portion 20151 of the first valve shaft.
  • the gasket member 2061 includes a first abutting portion 206a (a portion where the gasket member 2061 abuts against the first elastic member 208 ), and the gasket member 2061 includes a third abutting portion 206c (which can abut against the stepped portion 20152 ).
  • the washer member 2061 further includes a washer hole portion 20611, which penetrates the upper and lower surfaces of the washer 2061.
  • the contact member hole portion 206d is the washer hole portion 20611.
  • the valve core part 202 provided in this embodiment includes a bearing part 207 and a valve core 2023, the bearing part 207 is located above the valve core 2023, the bearing part 207 is in contact with the valve core 2023, the bearing part 207 or the second elastic
  • the member 204 may pass through the gasket hole portion 20611 (in this embodiment, in the form of the carrier member 207 passing through the gasket hole portion 20611).
  • the second elastic member 204 is in contact with the bearing member 207 , and the elastic load of the second elastic member 204 can be transmitted to the valve core 2023 through the bearing member 207 .
  • the bearing member 207 includes a first extending portion 2071, a second extending portion 2072, and a bearing surface portion 2073 connecting the first extending portion 2071 and the second extending portion 2072.
  • the first extending portion 2071 is approximately Located above the bearing member 207 , the first extending portion 2071 extends into the opening of the lower end of the second elastic member 204 , and the lower end of the second elastic member 204 abuts against the bearing surface 2073 .
  • the spool rotor assembly 20 shown in Figures 3a and 3b is the state when the electric valve is fully closed (that is, the state when the spool rotor assembly 20 is at the lowest end of its stroke).
  • 202a is pressed against the valve port 10a, and both the first elastic member 208 and the second elastic member 204 are in a compressed state, that is to say, the valve core member 202 (the bearing member 207 and the valve core 2023) is subjected to two
  • the downward elastic force the first downward elastic force comes from the elastic force generated by the further compression of the first elastic member 208, which is transmitted to the valve core 2023 through the gasket member 2061 and the bearing member 207; the second downward elastic force is applied to the valve core 2023.
  • the elastic force generated by the compression of the second elastic member 204 is transmitted to the valve core 2023 through the bearing member 207 .
  • the superposition of the above two elastic forces will provide the pressing force between the valve core part 202 and the valve port 10a, which can improve the performance index of the resistance to reverse pressure difference when the electric valve is fully closed.
  • the electric valve of the present invention further adds a second elastic member 204 in the first elastic member 208, and the elastic force of the second elastic member 204 can be superimposed with the elastic force of the first elastic member 208, thereby
  • the elastic force acting on the valve core part 202 can be further improved, and the ability of resisting the reverse pressure difference when the electric valve is fully closed can be further improved.
  • the first elastic member 208 and the second elastic member 204 are nested together, in order to reduce the possibility of entanglement between the two, preferably, the second elastic member 204 and the first elastic member 208 have opposite directions of helical rotation, which can reduce the A situation where an elastic member 208 and a second elastic member 204 are stuck together.
  • the bearing member 207 abuts against the gasket member 2061, and the gasket member 2061 is pushed up by the bearing member 207.
  • the bearing member 207 includes a second valve core abutting against
  • the gasket member 2061 includes the second abutting portion 206b (the portion abutting against the bearing member 207 ).
  • the orthographic projection of the gasket member 2061 along the plane and the orthographic projection of the second valve core abutting portion 202c along the plane have an overlapping area. Therefore, its gasket The component 2061 can be in contact with the valve core component 202 (in this embodiment, the bearing component 207 ) (of course, when other components are provided between the gasket component 2061 and the bearing component 207 to indirectly abut against each other, the above projection relationship may not be satisfied) , in this embodiment, the gasket hole 20611 and the outermost edge of the bearing member 207 are both circular, and the diameter of the gasket hole 20611 is smaller than the diameter of the outer contour of the bearing member 207, and the diameter of the outer contour of the bearing member 207 is slightly smaller than The diameter of the inner wall portion 20153 of the second valve shaft.
  • the top of the valve core 2023 is in a spherical top state, and the center lower side of the bearing member 207 and the valve core 2023 are in a concave spherical shape, and the two are in point contact when they are tightly matched.
  • the point contact fit is adopted here, which can reduce the frictional resistance of the valve core 2023 relative to the bearing member 207 to rotate. Theoretically, the frictional force arm of the point contact is zero, so the frictional resistance between the two is small.
  • valve core head 202a of the electric valve when the valve core head 202a of the electric valve is in contact with the valve port 10a, the relative rotation of the valve core 2023 relative to the valve port 10a is less, so that the rotation between the valve core head 202a and the valve port 10a can be reduced. friction, thereby reducing port leakage problems due to wear.
  • the point contact between the top of the valve core 2023 and the bearing member 207 is a theoretical state, and it is difficult to ensure that the contact between the two is point contact in the actual processing process.
  • the area of the contact surface between the two is less than 7 square millimeters.
  • FIG. 4a is a sectional view of the valve body when the electric valve of the present invention is opened until the valve core component just does not bear the elastic load of the first elastic member
  • FIG. 4b is a partial enlarged view of FIG. 4a.
  • the position of the spool rotor assembly 20 in Figures 4a and 4b is compared with the rotor position when the electric valve is fully closed in Figure 1 . Taking the position of the valve core rotor assembly 20 shown in FIGS.
  • valve core rotor assembly 20 continues to open upward, the elastic force of the first elastic member 208 will be carried by the step portion 20152 through the transmission of the gasket member 2061 , the bearing member 207 and the valve core 2023 will no longer be subjected to the elastic load of the first elastic member 208 .
  • the elastic force of the second elastic member 204 is still transmitted to the valve core 2023 through the bearing member 207 , and the valve core 2023 is still subjected to the downward elastic force load of the second elastic member 204 .
  • valve core head 202a abuts against the valve port 10a
  • first valve core abutting portion 202b is away from the valve shaft abutting portion 20154
  • the distance is h-k, and h-k>0.
  • FIG. 5a is a sectional view of the valve body when the electric valve of the present invention is opened until the head of the valve core just does not contact the valve port
  • FIG. 5b is a partial enlarged view of FIG. 5a.
  • the position of the spool rotor assembly 20 in Figures 5a and 5b is compared with the position of the spool rotor assembly 20 in Figures 4a and 4b, and its upward opening height is h-k, at this time, the spool head 202a is just in the abutment valve Critical state of port 10a.
  • the valve core 2023 is subjected to the downward elastic force of the second elastic member 204, and the first valve core abutting portion 202b just contacts the valve shaft abutting portion 20154, and the elastic force of the first elastic member 208 is transmitted by the gasket member 2061, and is blocked by the step Section 20152 carries.
  • the distance between the second valve body contact portion 202c of the carrier member 207 and the second contact portion 206b of the gasket member 2061 is h-k, and h-k>0.
  • the spool 2023 When the spool head 202a just contacts the valve port 10a in a critical state (ie, the state shown in Figures 5a and 5b), the spool 2023 is not subjected to the elastic load of the first elastic member 208, but only receives the second elastic force At this time, the elastic load of the washer part 2061 by the first elastic part 208 is greater than that of the valve core part 202 by the elastic load of the second elastic part 204 . Therefore, at the moment when the valve core 2023 contacts and separates from the valve port 10a, the electric valve of the present invention does not receive a particularly large pressing force, so the wear between the valve core 2023 and the valve port 10b can be reduced, and the damage caused by wear can be reduced. The problem that causes the valve port 10a to leak.
  • FIG. 6a is a sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree
  • FIG. 6b is a partial enlarged view of FIG. 6a.
  • the valve core rotor assembly 20 of the electric valve is opened from the position shown in Figures 5a and 5b to the position shown in Figures 6a and 6b.
  • the main body 2051 of the ejector rod is in contact with the housing 30, and the valve core 2023 is always pressed by both ends of the valve port 10a.
  • FIG. 7a is a cross-sectional view of the valve body when the electric valve of the present invention is over-opened until the screw pair is disengaged and screwed together
  • FIG. 7b is a partial enlarged view of FIG. 7a.
  • the amount is m, and the spool rotor assembly 20 is subjected to a downward elastic load by the second elastic member 204 . If the valve core rotor assembly 20 is further opened excessively, the external thread portion 201a of the valve shaft assembly 201 will be disengaged from the internal thread portion 10b of the nut 102 (ie, the state shown in FIGS. 7 a and 7 b ). The core rotor assembly 20 will no longer move upward.
  • valve core rotor assembly 20 If the coil 40 drives the valve core rotor assembly 20 to the closing direction of the electric valve, the valve core rotor assembly 20 is subjected to the downward elastic load of the second elastic member 204, and the valve core rotor assembly When the 20 rotates, the thread pair will be re-threaded.
  • the second elastic member 204 has two functions: first, when the electric valve is fully closed, the elastic force of the second elastic member 204 can strengthen the pressing force between the valve core 2023 and the valve port 10a The second is that when the electric valve is over-opened, the second elastic member 204 presses the valve shaft assembly 201 downward, which can make the over-opening and disengage the screwed spool rotor assembly 20 reset.
  • the rotor part 20 is opened upward from the fully closed state to the fully open state, from the opening state of FIGS. 4a, 4b, or from FIGS. 6a, 6b
  • the valve core 2023 is not subjected to the elastic load of the first elastic member 208 .
  • the valve core member 202 is not subjected to the elastic load of the first elastic member 208, which can reduce the impact force of the valve needle member 202 on the valve port 10a, and can also reduce the impact of the valve core member 202 on the valve port 10a.
  • the friction force of the relative rotational movement between the sealing parts of the two is reduced, so that the wear of the contact part can be reduced and the service life of the electric valve can be improved.
  • the core point of the structural features that can achieve the above functional effects in this embodiment is: when no other components are provided, some two components (the valve shaft assembly 201 and the gasket member 2061, the valve core 2023 and the valve shaft assembly 201) ) in the case of indirect contact, the height h between the stepped portion 20152 and the valve shaft contact portion 20154 is greater than the height k between the first valve body contact portion 202b and the second valve core contact portion 202c, that is, h>k .
  • the preferred h-k is greater than 0 and less than 0.3mm.
  • FIG. 8a is a sectional view of the valve body when the second embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • FIG. 8b is a partial enlarged view of FIG. 8a.
  • the valve core 2023 includes a valve core body portion 2021 and a valve core sleeve 2022.
  • the valve core sleeve 2022 includes a valve core sleeve hole portion 20221.
  • the valve core sleeve hole portion 20221 penetrates the upper and lower surfaces of the valve core sleeve 2022.
  • the valve core body portion 2021 The upper end of the valve core sleeve passes through the valve core sleeve hole portion 20221, and the valve core body portion 2021 and the valve core sleeve 2022 can be fixedly connected by means of press fitting, welding or bonding.
  • the diameter of the valve core head portion 202a is set to be larger than the diameter of the third valve shaft inner wall portion 20155.
  • the valve core body portion 2021 is inserted into the central through hole of the valve shaft 2011 from bottom to top, and then the valve core sleeve 2022 is fitted from top to bottom and fixed at the approximate upper end position of the valve core body portion 2021 .
  • valve core sleeve hole portion 20221 can also be in the form of a blind hole, that is, the valve core body portion 2021 is fixedly connected to the valve core sleeve 2022, but the valve core body portion 2021 does not penetrate above the valve core sleeve hole portion 20221, that is,
  • the valve core sleeve hole portion 20221 of the present invention is not limited to the form of a through hole; or the valve core sleeve hole portion 20221 is in the form of a through hole, but the valve core body portion 2021 does not penetrate above the valve core sleeve hole portion 20221.
  • valve core sleeve 2022 can abut against the valve shaft abutting portion 20154, the valve core sleeve 2022 includes the first valve core abutting portion 202b, the bearing member 207 can bear the elastic load of the second elastic member 204, and The elastic load of the second elastic member 204 is transmitted to the valve core 2023, the bearing member 207 includes the third valve core abutting portion 202d, the gasket member 2061 can be supported by the bearing member 207 and away from the step portion 20152, and the bearing member 207 includes the second valve core Abutting portion 202c.
  • FIG. 9a is a sectional view of the valve body when the third embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • FIG. 9b is a partial enlarged view of FIG. 9a.
  • the main difference between this embodiment is that the part of the bearing member 207 is located in the valve core sleeve 2022, and the valve core member 202 is opposite to the valve shaft assembly 201.
  • the gasket member 2061 is supported and pushed up by the upper end surface of the valve core sleeve 2022.
  • the valve core sleeve 2022 includes a second valve core abutting portion 202c.
  • FIG. 10a is a sectional view of the valve body when the fourth embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • FIG. 10b is a partial enlarged view of FIG. 10a.
  • the valve core sleeve hole portion 20221 has a blind hole structure
  • the top of the valve core sleeve 2022 is In the spherical state, the top surface is in contact with the concave surface on the lower side of the center of the bearing member 207 .
  • the structural solutions of other parts of this embodiment may be the same as or similar to those of the second embodiment in FIGS. 8 a and 8 b .
  • FIG. 11a is a sectional view of the valve body when the fifth embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • FIG. 11b is a partial enlarged view of FIG. 11a.
  • the main difference is that the convex spherical surface on the top of the valve core 2023 becomes a concave spherical surface, while the concave spherical surface on the lower side of the bearing member 207 becomes a convex spherical surface.
  • the latter two have the same effect; in addition, the valve core 2023 adopts the method of separately processing two parts and then fixing the two parts together.
  • the structural scheme of other parts of this embodiment may be the same as or similar to the first embodiment in FIGS. 5 a and 5 b .
  • FIG. 12a is a sectional view of the valve body when the sixth embodiment of the electric valve of the present invention is opened to the maximum opening degree
  • FIG. 12b is a partial enlarged view of FIG. 12a.
  • the main difference is that a steel ball accommodating part 202e is provided on the top of the valve core 2023, and the steel ball accommodating part 202e is a groove set on the top of the valve core 2023, and the steel ball accommodating part 202e
  • a steel ball 2024 is arranged in the part 202e, and the spherical top of the steel ball 2024 is in contact with the lower end surface of the bearing member 207 to achieve point contact.
  • FIG. 13a is a sectional view of the valve body when the electric valve of the seventh embodiment of the present invention is in a fully closed state
  • FIG. 13b is a partial enlarged view of FIG. 13a.
  • the valve body member 202 includes a first valve body contact portion 202b, a second valve body contact portion 202c, and a third valve body contact portion 202d.
  • FIG. 14a is a sectional view of the valve body when the electric valve of the eighth embodiment of the present invention is in a fully closed state
  • FIG. 14b is a partial enlarged view of FIG. 14a.
  • the main difference is that the valve core member 202 does not pass through the gasket hole 20611 , and the second elastic member 204 passes through the gasket hole 20611 to abut against the valve core member 202 .
  • FIG. 15a is a cross-sectional view of the valve body when the electric valve of the ninth embodiment of the present invention is opened to the maximum opening degree
  • FIG. 15b is a partial enlarged view of FIG. 15a.
  • the structure of the bearing member 207 has changed. The main difference in this embodiment is that the bearing member 207 does not pass through the washer hole 20611, and the second elastic member 204 passes through it. The through-gasket hole portion 20611 abuts against the bearing member 207 .
  • Figure 16a is a sectional view of the valve body when the motor-operated valve of the tenth embodiment of the present invention is in a fully closed state
  • Figure 16b is a partial enlarged view of Figure 16a.
  • the structure of the valve shaft assembly 201 is changed.
  • the valve shaft assembly 201 includes a valve shaft main body portion 2013 and a cylindrical member 2014.
  • the valve shaft main body portion 2013 has a through hole that penetrates up and down, and the valve shaft main body
  • the valve shaft main body 2013 is fixedly connected with the cylindrical member 2014, and the approximate side wall area of the central through hole after the two are fixedly connected forms the valve shaft inner wall portion 2015.
  • the valve shaft The upper end portion of the shaft main body portion 2013 protrudes into the through hole of the cylindrical member 2014.
  • the valve shaft main body portion 2013 can also be fixed to the through hole of the cylindrical member 2014 without the valve shaft main body portion 2013 extending into the through hole of the cylindrical member 2014.
  • the cylindrical member 2014 is substantially in the shape of a hollow cylinder, a cylindrical member abutting portion 20141 is provided substantially above the cylindrical member 2014, and a cylindrical member through-hole portion 201411 is provided at a substantially central position of the cylindrical member abutting portion 20141,
  • the orthographic projection of the through-hole portion 201411 of the cylindrical member along the plane is located outside the orthographic projection of the ejector rod main body portion 2051 along the plane, and is located along the plane of the ejector rod abutting portion 2052
  • the diameter of the through-hole portion 201411 of the cylindrical member is larger than the diameter of the main body portion 2051 of the ejector pin, and smaller than the diameter of the ejector pin abutting portion 2052, so the ejector pin abutting portion 2052 can The abutting parts 20141 abut against each other.
  • the valve core 2023 can abut against the upper end surface of the valve shaft main body portion 2013
  • the valve shaft abutting portion 20154 is formed on the upper end surface of the valve shaft main body portion 2013
  • the first elastic member 208 and the second elastic member 204 are accommodated
  • the cylindrical member abutting portion 20141 abuts against the first elastic member 208
  • the cylindrical member abutting portion 20141 can abut against the ejector rod abutting portion 2052
  • the abutting portion 20141 of the cylindrical member includes a spring abutting portion 20a, and the main body portion 2051 of the ejector rod can pass through the through-hole portion 201411 of the cylindrical member to abut against the housing 30 .
  • the abutment member 206 provided in this embodiment includes an abutment bracket 2062, and the abutment bracket 2062 can abut against the valve shaft abutment portion 20154.
  • the abutment frame 2062 has a substantially cylindrical structure, which includes an abutment frame top 20621 located at the top and an abutment frame side portion 20622 extending downwardly along the circumferential edge of the abutment frame top 20621 .
  • the inner wall portion 2015 of the valve shaft is not provided with the stepped portion 20152.
  • the first valve core abutting portion 202b can abut against the valve shaft contact portion 20154, and the contact frame 2062 is sleeved on the valve core 2023.
  • the abutment frame 2062 includes a third abutment portion 206c (a portion that abuts against the valve shaft abutment portion 20154 ), and in addition, the abutment frame top 20621 abuts against the first elastic member 208 , in this embodiment
  • the abutment bracket 2062 includes a first abutment portion 206a.
  • the abutment frame 2062 further includes abutment frame hole portion 20623, the abutment frame hole portion 20623 penetrates the upper and lower surfaces of the abutment frame top 20621, and the upper end of the bearing member 207 passes through the abutment frame hole portion 20623 The upper end of the bearing member 207 penetrates into the second elastic member 204 and is located at the inner edge of the through hole of the second elastic member 204 , and the abutting member hole 206d is the abutting frame hole 20623 at this time.
  • the second elastic member 204 when the second elastic member 204 is about to undergo radial deviation, it can be restricted by the bearing member 207, which can reduce the radial deviation of the second elastic member 204, and the second elastic member 204 is more stable in the electric valve. It is beneficial to increase the service life of the electric valve.
  • the height from the valve shaft abutting portion 20154 to the second abutting portion 206b is h
  • the distance from the first valve core abutting portion 202b to the second valve core abutting portion 202c is k, as shown in FIGS. 16a and 16b
  • the second abutting portion 206b and the second valve body abutting portion 202c are in a state of just contacting, and at this time, the first valve body abutting portion 202b and the valve shaft abutting portion 20154 have a distance h-k.
  • the abutting frame top 20621 of the abutting frame 2062 In contact with the second valve body abutting portion 202c, the abutment frame top 20621 includes a second abutting portion 206b, and the first valve body abutting portion 202b and the valve shaft abutting portion 20154 change from a state of abutting to a state of non-abutting,
  • the valve core member 202 further rises relative to the valve shaft assembly 201
  • the second abutting portion 206b of the abutting frame 2062 abuts against the second valve core abutting portion 202c
  • the valve core member 202 receives the elastic load of the first elastic member 208
  • the elastic force of the first elastic member 208 can
  • the stepped portion 20152 is not provided, but for the present application, the stepped portion 20152 can also be provided.
  • the stepped portion 20152 can be provided on the inner wall portion 2015 of the valve shaft, and the stepped portion 20152 can be connected with the abutment frame. The lower ends of the side portions 20622 are abutted against each other, and the technical effect of the present application can also be achieved.
  • Figure 17a is a sectional view of the valve body when the electric valve of the eleventh embodiment of the present invention is opened to the maximum opening degree
  • Figure 17b is a partial enlarged view of Figure 17a.
  • valve core part 202 is provided with a valve core body part 2021 and a valve core sleeve 2022, and the valve core body part 2021 and the valve core sleeve are provided with 2022 is fixedly connected.
  • the valve core body portion 2021 includes a third valve core abutting portion 202d
  • the valve core sleeve 2022 includes a first valve core contact portion 202b and a second valve core contact portion 202c.
  • the valve core body portion 2021 passes through the gasket hole portion 20611 , and the second elastic member 204 abuts against the valve core body portion 2021 .
  • valve core body portion 2021 may not pass through the gasket hole portion 20611, and the second elastic member 204 passes through the gasket hole portion 20611 to abut against the valve core member 202.
  • FIG. 18a is a sectional view of the valve body when the electric valve of the twelfth embodiment of the present invention is opened to the maximum opening degree
  • FIG. 18b is a partial enlarged view of FIG. 18a.
  • the valve core sleeve 2022 includes a first valve core abutting portion 202b, a second valve core contact portion 202c, and a third valve core abutting portion 202d.
  • the abutment member 206 can also be in the form of an abutment frame 2062, and the valve shaft assembly 201 can also be in the form of a valve shaft main body 2013 and a cylindrical member 2014.
  • a valve The structure of the core part 202 is described, and the forms of the valve core part 202 and other parts do not conflict or contradict.
  • valve core body part 2021 , the valve core sleeve 2022 and the bearing part 207 can all be integrally processed and formed, or two can be integrally processed and formed, or all three can be processed separately form.
  • a washer or a washer may be added to the lower end of the second elastic member 204 , or between the first valve core abutting portion 202b and the valve shaft abutting portion 20154 .
  • a washer is arranged between, or a washer or a washer is added at the upper end of the second elastic member 204, or a washer or a washer is added between the bearing member 207 and the valve core 2023.
  • a form in which the ejector rod 205 can abut against the housing 30 is adopted.
  • other components can also be connected to the housing 30, and the ejector rod 205 can be in a form of abutment with this part.
  • a coating with lubricating and wear-resistant function (such as containing polytetrafluoroethylene) can be sprayed or plated on its surface.
  • vinyl fluoride, or a coating containing graphite, or a molybdenum disulfide component can be sprayed or plated on its surface.
  • a or b if a and b do not conflict, include the three cases of a, b and ab, where a and b refer to structural features or connection relationships or technical solutions and the like.
  • orientation nouns such as upper, lower, left and right mentioned in this embodiment are all based on the drawings of the description and are introduced for the convenience of description; Ordinal numbers such as "second” are also introduced for the convenience of description, and do not imply any limitation on any order of the components.

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Abstract

一种电动阀，包括阀座部件（10）和阀芯转子组件（20），阀芯转子组件（20）包括阀轴组件（201）、阀芯部件（202）、第一/二弹性件（208、204）、抵接部件（206）；阀轴组件（201）包括阀轴抵接部（20154）；阀芯部件（202）包括第一阀芯抵接部（202b），第一阀芯抵接部（202b）能够与阀轴抵接部（20154）相抵；第一弹性件（208）与阀轴组件（201）相抵，抵接部件（206）包括第一抵接部（206a），第一弹性件（208）与第一抵接部（206a）相抵；抵接部件（206）包括第二抵接部（206b），阀芯部件（202）包括第二阀芯抵接部（202c），第二抵接部（206b）能够与第二阀芯抵接部（202c）相抵，抵接部件（206）包括第三抵接部（206c），第三抵接部（206c）能够与阀轴组件（201）相抵；第二弹性件（204）与阀轴组件（201）相抵，抵接部件（206）包括抵接部件孔部（206d），阀芯部件（202）或第二弹性件（204）穿过抵接部件孔部（206d），阀芯部件（202）包括第三阀芯抵接部（202d），第二弹性件（204）与第三阀芯抵接部（202d）相抵，可以减小阀芯（2023）与阀口（10a）接触瞬间阀芯（2023）对阀口（10a）的冲击力。

Description

一种电动阀
本申请要求下述4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：
1、2021年02月01日提交中国专利局、申请号为202110135662.X、发明名称为“一种电动阀”；
2、2021年10月29日提交中国专利局、申请号为202111268358.9、发明名称为“一种电动阀”；
3、2021年10月29日提交中国专利局、申请号为202111268357.4、发明名称为“一种电动阀”；
4、2021年11月05日提交中国专利局、申请号为2021113073706、发明名称为“一种电子膨胀阀”。
【背景技术】
见图19，CN109723884A公开了一种电动阀，该电动阀具有导向衬套20，阀轴保持架30，导向衬套20上设置有固定外螺纹部23，阀轴保持架30上设置有可动内螺纹部33，所述固定外螺纹部23和可动内螺纹部33构成该电动阀的螺纹进给机构28。该电动阀的阀体主要由三部分构成。
该电动阀的阀轴10在形成于所述阀轴10的上部小径部11和下部大径部12之间的台阶面13和阀轴保持架30的顶部32的下表面之间，夹着配置于所述阀轴保持架30的顶部32的下表面侧的圆板状的压板61，并以外插于阀轴10的上部小径部11的方式压缩配置有压缩螺旋弹簧(施力部件)60，该压缩螺旋弹簧60向使所述阀轴10与所述阀轴保持架30在升降方向(轴线O方向)上远离的方向施力，换言之，压缩螺旋弹簧60总是对所述阀轴10(阀芯14)向下方(闭阀方向)施力。
【发明内容】
本发明的目的在于提供一种电动阀，包括阀体和线圈，所述线圈套设 于所述阀体，所述阀体包括阀座部件和阀芯转子组件，所述阀芯转子组件包括阀轴组件、阀芯部、第一弹性件、第二弹性件以及抵接部件；
所述阀轴组件包括阀轴抵接部；
所述阀芯部件包括第一阀芯抵接部，所述第一阀芯抵接部能够与所述阀轴抵接部相抵；
所述第一弹性件的上端部与所述阀轴组件相抵，所述抵接部件包括第一抵接部，所述第一弹性件的下端部与所述第一抵接部相抵，所述抵接部件包括第二抵接部，所述阀芯部件包括第二阀芯抵接部，所述第二抵接部能够与所述第二阀芯抵接部相抵，所述抵接部件包括第三抵接部，所述第三抵接部能够与所述阀轴组件相抵；
所述第一弹性件外套于所述第二弹性件，所述第二弹性件的上端部与所述阀轴组件相抵，所述抵接部件包括抵接部件孔部，所述阀芯部件或者所述第二弹性件穿过所述抵接部件孔部，所述阀芯部件包括第三阀芯抵接部，所述第二弹性件的下端部与所述第三阀芯抵接部相抵；
所述阀座部件包括阀口，所述阀芯部件能够与所述阀口相抵；
当所述第三抵接部与所述阀轴组件相抵、所述第一阀芯抵接部与所述阀轴抵接部相抵时，所述第一弹性件的弹力被所述阀轴组件承载，所述抵接部件受到所述第一弹性件的弹力大于所述阀芯部件受到所述第二弹性件的弹力。
本申请提供的电子膨胀阀，当所述第三抵接部与所述阀轴组件相抵、所述第一阀芯抵接部与所述阀轴抵接部相抵时，所述第一弹性件的弹力被所述阀轴组件承载，所述抵接部件受到所述第一弹性件的弹力大于所述阀芯部件受到所述第二弹性件的弹力，可以减小阀芯与阀口接触瞬间阀芯对阀口的冲击力。
【附图说明】
图1是本发明电动阀处于全关状态的剖视图；
图2是本发明电动阀阀座部件的结构示意图；
图3a是本发明电动阀处于全关状态时转子部件的结构示意图，图3b 是图3a的局部放大图；
图4a是本发明电动阀开启到阀芯刚好不承载第一弹性件弹力时的阀体剖视图，图4b是图4a的局部放大图；
图5a是本发明电动阀开启到阀芯头部刚好不接触阀口时的阀体剖视图，图5b是图5a的局部放大图；
图6a是本发明电动阀开启到最大开度时的阀体剖视图，图6b是图6a的局部放大图；
图7a是本发明电动阀过度开启到螺纹副脱开螺合时的阀体剖视图，图7b是图7a的局部放大图；
图8a是本发明电动阀第二实施例开启到最大开度时的阀体剖视图，图8b是图8a的局部放大图；
图9a是本发明电动阀第三实施例开启到最大开度时的阀体剖视图，图9b是图9a的局部放大图；
图10a是本发明电动阀第四实施例开启到最大开度时的阀体剖视图，图10b是图10a的局部放大图；
图11a是本发明电动阀第五实施例开启到最大开度时的阀体剖视图，图11b是图11a的局部放大图；
图12a是本发明电动阀第六实施例开启到最大开度时的阀体剖视图，图12b是图12a的局部放大图；
图13a是本发明电动阀第七实施例电动阀处于全关状态时的阀体剖视图，图13b是图13a的局部放大图。
图14a是本发明电动阀第八实施例电动阀处于全关状态时的阀体剖视图，图14b是图14a的局部放大图。
图15a是本发明电动阀第九实施例电动阀开启到最大开度时的阀体剖视图，图15b是图15a的局部放大图。
图16a是本发明电动阀第十实施例电动阀处于全关状态时的阀体剖视图，图16b是图16a的局部放大图。
图17a是本发明电动阀第十一实施例电动阀开启到最大开度时的阀体剖视图，图17b是图17a的局部放大图。
图18a是本发明电动阀第十二实施例电动阀开启到最大开度时的的阀体剖视图，图17b是图17a的局部放大图；
图19为背景技术中电动阀的剖视图；
其中，图1-图19包括以下附图标记：
10阀座部件；101阀座；102螺母；103第一接管部；104第二接管部；10a阀口；10b内螺纹部；10c固定止动部；10d第一出入通道；10e第二出入通道；20阀芯转子组件；201阀轴组件；2011阀轴；2012衬套；20121衬套孔部；2013阀轴主体部；2014筒状件；20141筒状件抵接部；201411筒状件通孔部；2015阀轴内壁部；20151第一阀轴内壁部；20152台阶部；20153第二阀轴内壁部；20154阀轴抵接部；20155第三阀轴内壁部；2016外缘部；20161第一外缘部；20162第二外缘部；201a外螺纹部；201b可动止动部；201c转子固定部；202阀芯部件；2021阀芯主体部；2022阀芯套；20221阀芯套孔部；202a阀芯头部；202b第一阀芯抵接部；202c第二阀芯抵接部；202d第三阀芯抵接部；202e钢球容纳部；2024钢球；203转子；204第二弹性件；205顶杆；2051顶杆主体部；20511第一顶杆主体部；20512第二顶杆主体部；2052顶杆抵靠部；206抵接部件；206a第一抵接部；206b第二抵接部；206c第三抵接部；2061垫圈部件；20611垫圈孔部；2062抵接架；20621抵接架顶部；20622抵接架侧部；20623抵接架孔部；承载部件207；2071第一伸入部；2072第二伸入部；208第一弹性件；20a弹簧抵接部；30外壳；40线圈。
【具体实施方式】
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施例对本发明作进一步的详细说明。
请参考图1至图7b，其中，图1是本发明电动阀处于全关状态的剖视图；图2是本发明电动阀阀座部件的结构示意图；图3a是本发明电动阀处于全关状态时转子部件的结构示意图，图3b是图3a的局部放大图；图4a是本发明电动阀开启到阀芯刚好不承载第一弹性件弹力时的阀体剖视图，图4b是图4a的局部放大图；图5a是本发明电动阀开启到阀芯头部刚好不 接触阀口时的阀体剖视图，图5b是图5a的局部放大图；图6a是本发明电动阀开启到最大开度时的阀体剖视图，图6b是图6a的局部放大图；图7a是本发明电动阀过度开启到螺纹副脱开螺合时的阀体剖视图，图7b是图7a的局部放大图；
请具体参考图1至图3b，在一种具体实施例中，本发明提供的电动阀包括阀体和线圈40，线圈40套设于阀体，阀体包括阀芯转子组件20(图3a、3b所示)、阀座部件10(图2所示)和外壳30(图1所示)。电动阀的线圈40连接驱动控制器，驱动控制器通电后，向线圈40发出脉冲驱动信号，线圈40产生变化的磁场，从而驱动电动阀的阀芯转子组件20进行正向或反向旋转。
外壳30的一端呈开口状，外壳30为薄壁件，呈罩壳状，外壳30的下端开口侧与阀座部件10密闭焊接，从而形成了一个容纳腔室，可以容纳螺母102(会在下面提到)的上半部分以及阀芯转子组件20(会在下面提到)的主体部分。
见图3a、3b，阀芯转子组件20包括阀轴组件201，在本实施例中，阀轴组件201包括阀轴2011和衬套2012，衬套2 012固定于阀轴2011的大致上端位置，衬套2012包括贯穿其上下表面的衬套孔部20121。阀轴2011设有外螺纹部201a。
见图2，阀座部件10包括螺母102，螺母102的内孔部位设有内螺纹部10b，阀轴2011与螺母102螺纹配合，阀芯转子组件20旋转运动的同时，阀轴2011会沿轴方向发生位移运动，从而可带动阀芯部件202实现阀口10a的开闭动作。
见图1、图2，阀座部件10具有阀口10a，以及第一出入通道10d和第二出入通道10e，阀口10a能够与第一出入通道10d和第二出入通道10e连通，以使流体介质(例如冷媒)通过，此外，阀座部件10的大致中心位置设置有上下贯通的贯通孔，在贯通孔的内壁设置有内螺纹部10b(也可称为固定螺纹部)，该内螺纹部10b与阀轴2011的大致下方位置设置的外螺纹部201a(也可称为可动螺纹部)组合构成本电动阀的螺旋进给机构(螺纹副)。
在本实施例中，阀座部件10包括螺母102，螺母102设有贯通孔，在螺母102的贯通孔内壁设置有内螺纹部10b，阀座部件10还包括阀座101，螺母102的部分位于该阀座101内，且螺母102与阀座101固定连接(例如采用将连接体作为嵌件与螺母102一体注塑成型，再将连接体与阀座101焊接或者压装的方式固定连接，或者直接将螺母102与阀座101压装固定等方式，在本实施例中，通过连接体作为嵌件与螺母102一体注塑成型、连接体与阀座101焊接固定的方式实现螺母102与阀座101的固定连接)，阀座101一体加工成型有阀口10a(当然也可以采用阀口10a形成于其他部件，再将该部件与阀座101固定连接的形式)，此外，在本实施例中，阀座101与第一接管部103、第二接管部104固定连接，第一接管部103和第二接管部104作为电动阀流体介质的流入或流出通道，其安装在空调等制冷、制热系统中时，一般用于与系统管路连接。
在本实施例中，第一接管部103、第二接管部104采用了与阀座101焊接连接的方式，当然，也可以不设置第一接管部103、第二接管部104，而采用冷媒流体通过的流路直接设置于阀座101，或者，第一接管部103或第二接管部104也可以采用法兰密封连接的方式，例如在该电动阀应用于汽车空调、热泵等需要能够快速维修的场合。在本实施例中以电动阀设置第一接管部103和第二接管部104举例说明。
见图2，结合图1，螺母102凸出于环状基体设置有固定止动部10c，其与设置于阀芯转子组件20的可动止动部201b配合，构成本电动阀的行程下端的止动机构，即当阀芯转子组件20相对于阀座部件10向下作动到一定程度时，可动止动部201b能够与固定止动部10c相抵，以限制阀芯转子组件20相对于阀座部件10的转动，从而限制阀芯转子组件20在轴向方向继续向下作动，从而可以控制阀芯转子组件20向下运动的行程。
请参考图3a、3b，阀芯转子组件20还包括转子203和阀芯部件202，转子203在圆周方向带有磁极，阀芯部件202穿设于阀轴2011的中心通孔，此外，阀芯转子组件20还包括设置于阀轴2011的中心通孔内的第一弹性件208和第二弹性件204，第一弹性件208外套于所述第二弹性件204，以及第二弹性件204的上端部设置的顶杆205。
顶杆205包括顶杆主体部2051和顶杆抵靠部2052，顶杆抵靠部2052大致为顶杆主体部2051的周向延伸形成的结构。顶杆抵靠部2052位于衬套2012的下方，顶杆主体部2051的部分从衬套孔部20121穿出，其可以与外壳30相抵。顶杆抵靠部2052位于第一弹性件208的内缘，第一弹性件208上端部与衬套2012抵靠，其弹力载荷始终不作用于顶杆205。
请参考图3a、3b，在本实施例中，顶杆主体部2051包括第一顶杆主体部20511和第二顶杆主体部20522，第一顶杆主体部20511大致位于顶杆抵靠部2052的上方，第二顶杆主体部20512大致位于顶杆抵靠部2052的下方，第一顶杆主体部20511的部分可以从衬套孔部20121穿出。第二顶杆主体部20512伸入至第二弹性件204的上端开口内缘，即第二弹性件204外套于第二顶杆主体部20512，可以减少第二弹性件204产生偏斜的情况。
第一弹性件208的下端部与抵接部件206(会在下文提到)抵靠，第一弹性件208的上端部与衬套2012抵靠，包括第一弹性件208的上端部与衬套2012直接相抵，例如本实施例中的形式，也包括第一弹性件208的上端部与衬套2012间接相抵，例如第一弹性件208的上端部与顶杆抵靠部2052直接相抵，与衬套2012间接相抵的形式。第二弹性件204的下端部与阀芯部件202抵靠，第二弹性件204的上端部与顶杆205的顶杆抵靠部2052抵靠。
此外，在本实施例中，第一弹性件208的上端部开口外套于顶杆抵靠部2052，即顶杆抵靠部2052位于所述第一弹性件208上端部开口内，因此，当第一弹性件208的上端部欲产生径向偏移时，能受到顶杆抵靠部2052的限制，因此可以减少第一弹性件208产生偏斜的情况，可以减少第一弹性件208和第二弹性件204卡在一起的情况。
第二弹性件204的下端部与阀芯部件202抵靠，第二弹性件204的上端部与顶杆205的顶杆抵靠部2052抵靠。
见图3a、3b，本实施例提供的电动阀包括弹簧抵接部20a，弹簧抵接部20a大致为阀轴组件201与第一弹性件208的上端部、第二弹性件204的上端部相抵的部分(包括直接相抵或者间接相抵，在本实施例中，第一 弹性件208与衬套2012直接相抵，第二弹性件204与衬套2012通过顶杆抵靠部2052间接相抵)，第一弹性件208和第二弹性件204的弹力载荷可以直接或间接传递至衬套2012，衬套2012受到第一弹性件208和第二弹性件204的弹力载荷，阀轴组件201与第一弹性件208、第二弹性件204相抵，在本实施例中，衬套2012包括弹簧抵接部20a。
见图3a、3b，在本实施例中，阀轴2011包括上下贯通的孔，该贯通孔的内壁大致形成阀轴内壁部2015，在阀轴2011的轴向方向，阀轴内壁部2015的内径并不是相同的，具体的，阀轴内壁部2015包括第一阀轴内壁部20151、台阶部20152、第二阀轴内壁部20153、阀轴抵接部20154以及第三阀轴内壁部20155，在阀轴2011的轴向方向，第一阀轴内壁部20151位于第二阀轴内壁部20153的上方、第二阀轴内壁部20153位于第三阀轴内壁部20155的上方，且在阀轴2011的横截面所在的平面，第一阀轴内壁部20151沿该平面的正投影(该正投影为封闭的线或环面)位于第二阀轴内壁部20153沿该平面的正投影(该正投影为封闭的线或环面)外，第二阀轴内壁部20153沿该平面的正投影(该正投影为封闭的线或环面)位于第三阀轴内壁部20155沿该平面的正投影(该正投影为封闭的线或环面)外，通常为了加工制造方便，第一阀轴内壁部20151、第二阀轴内壁部20153、第三阀轴内壁部20155的截面都设置为圆形，此时，第一阀轴内壁部20151的直径大于第二阀轴内壁部20153的直径，第二阀轴内壁部20153的直径大于第三阀轴内壁部20155的直径，在本实施例中，第一阀轴内壁部20151、第二阀轴内壁部20153、第三阀轴内壁部20155在高度方向都是等径的，因此第一阀轴内壁部20151、第二阀轴内壁部20153和第三阀轴内壁部20155沿该阀轴2011的横截面所在的平面的正投影为圆。
此外，台阶部20152和阀轴抵接部20154在水平方向具有延伸距离，在阀轴2011的轴向方向，台阶部20152位于阀轴抵接部20154的上方，台阶部20152的外缘与第一阀轴内壁部20151相交，内缘与第二阀轴内壁部20153相交，阀轴抵接部20154的外缘与第二阀轴内壁部20153相交，内缘与第三阀轴内壁部20155相交，当第一阀轴内壁部20151、第二阀轴内壁部20153和第三阀轴内壁部20155的截面都设置为圆形时，台阶部 20152、阀轴抵接部20154沿阀轴2011的横截面所在的平面的正投影都呈圆环状，在本实施例中，台阶部20152和阀轴抵接部20154为水平方向，当然，台阶部20152和阀轴抵接部20154也可以设置成不完全呈水平的形式，例如，在远离阀轴2011的轴线的方向，阀轴抵接部20154逐渐向上或向下延伸(台阶部20152同理)，可以理解，台阶部20152和阀轴抵接部20154仅需要满足在水平方向具有延伸距离即可。
继续参考图3a、3b，在本实施例中，阀轴2011包括外缘部2016，外缘部2016包括第一外缘部20161和第二外缘部20162，第一外缘部20161位于第二外缘部20162的上方，在阀轴2011的横截面所在的平面，第一外缘部20161沿该平面的正投影位于第二外缘部20162沿该平面的正投影之外，通常，为了加工方便，将第一外缘部20161和第二外缘部20162的截面都设置为圆形，第一外缘部20161所在阀轴2011的部分设置有转子固定部201c，转子203与转子固定部201c可以采用直接或者间接焊接、铆接、磁塑材料注塑连接、胶水粘接等方式固定，在本实施例中，采用连接件作为嵌件与磁塑材料注塑连接，再将阀轴2011与连接件通过焊接的方式固定连接，当转子203与阀轴2011采用直接连接的方式时，也可以采用将阀轴2011作为嵌件与磁塑材料一体注塑连接的形式。
第二外缘部20162所在的阀轴2011的位置设置有外螺纹部201a，该外螺纹部201a(也称为可动螺纹部)，该外螺纹部201a与螺母102的内孔部位设置的内螺纹部10b(也称为固定螺纹部)组合构成本电动阀的螺旋进给机构(螺纹副)。
见图3a、3b，本实施例的电动阀包括第一弹性件208和第二弹性件204，第一弹性件208和第二弹性件204可设计成圆柱螺旋弹簧，第一弹性件208和第二弹性件204位于阀轴组件201内，第一弹性件208的圆柱外径略小于第一阀轴内壁部20151的直径，第一弹性件208的内缘直径大于第二弹性件204的圆柱外径。第二弹性件204放置在第一弹性件208内，即第二弹性件204嵌套在第一弹性件208的内径孔之中，第一弹性件208外套于所述第二弹性件204。因为可将第二弹性件204嵌套在第一弹性件208的内径孔之中，本发明结构的电动阀相比背景技术，可有效减小电动阀的高 度尺寸，有利于节约电动阀在相关设备中的安装空间。
见图3a、3b，本实施例中，阀芯部件202穿设于阀轴2011(阀芯部件202的部分位于阀轴内壁部2015内)，此外，阀芯部件202具有阶梯轴状的结构，其包括阀芯头部202a，阀芯头部202a位于阀芯部件202的大致下端位置，阀芯头部202a的尖端形状与电动阀所需的流量调节曲线相关，阀芯部件202还包括第一阀芯抵接部202b，第一阀芯抵接部202b位于阀芯部件202的大致靠近上端位置，本实施例中，在阀芯部件202的横截面所在的平面，阀芯头部202a沿该平面的正投影位于第一阀芯抵接部202b沿该平面的正投影内，本实施例中阀芯头部202a和第一阀芯抵接部202b的横截面都呈圆形，因此第一阀芯抵接部202b的直径大于阀芯头部202a的直径，在本实施例中，阀芯部件202从上往下的方向插装在阀轴2011的阀轴内壁部2015中，其第一阀芯抵接部202b能够与阀轴抵接部20154相抵，其阀芯头部202a从第三阀轴内壁部20155穿出。在阀芯部件202的横截面所在的平面，第一阀芯抵接部202b沿该平面的正投影与阀轴抵接部20154沿该平面的正投影存在重叠区域，因此，第一阀芯抵接部202b能够与阀轴抵接部20154相抵(当然，当阀轴抵接部20154和第一阀芯抵接部202b之间设置有垫圈等部件使其不直接相抵，第一阀芯抵接部202b和阀轴抵接部20154的投影关系也可以不满足以上关系)，在本实施例中，第一阀芯抵接部202b外缘、第二阀轴内壁部20153截面形状、第三阀轴内壁部20155的截面形状都呈圆形，且第一阀芯抵接部202b的直径略小于第二阀轴内壁部20153的直径，第一阀芯抵接部202b的直径大于第三阀轴内壁部20155的直径，阀芯头部202a最大处的直径略小于第三阀轴内壁部20155的直径，此时阀芯部件202能够被支撑在阀轴2011的阀轴抵接部20154之上。
见图3a、3b，本申请提供的电动阀还包括抵接部件206，抵接部件206包括第一抵接部206a，第一弹性件208的下端部与第一抵接部206a相抵，抵接部件206还包括第二抵接部206b，第二抵接部206b能够与第二阀芯抵接部202c(下文会提到)相抵，抵接部件206还包括第三抵接部206c，第三抵接部206c能够与阀轴组件201(在本实施例中为台阶部20152)相 抵，抵接部件206还包括抵接部件孔部206d，阀芯部件202还包括第三阀芯抵接部202d，第二弹簧204的下端部和阀芯部件202的第三阀芯抵接部202d能够通过抵接部件孔部206d相抵，第二弹性件204的部分或第三阀芯抵接部202d的部分位于所述抵接部件孔部(206d)内；例如采用第二弹簧204或者阀针部件202穿过抵接部件孔部206d的形式，在本实施例中，采用阀针部件202穿过抵接部件孔部206d的形式。
继续参考图3a、3b，在本实施例中，抵接部件206为垫圈部件2061，垫圈部件2061能够与台阶部20152相抵(在图3a、3b中处于全关状态，垫圈部件2061与台阶部20152处于未抵接的状态)，具体的，在电动阀的横截面所在的平面，垫圈部件2061沿该平面的正投影与台阶部20152沿该平面的正投影存在重叠区域，因此，其垫圈部件2061能够与台阶部20152相抵(当然，当设置有2个或多个垫圈部件2061时，并不一定每个垫圈部件2061与台阶部20152都满足以上关系)，在本实施例中，垫圈部件2061的外缘和台阶部20152的内缘都呈圆形，且垫圈部件2061的外径大于第二阀轴内壁部20153的直径，垫圈部件2061的外径略小于第一阀轴内壁部20151的直径。
因此，在本实施例中，垫圈部件2061包括第一抵接部206a(垫圈部件2061与第一弹性件208相抵的部分)，垫圈部件2061包括第三抵接部206c(能够与台阶部20152抵接的部分)，垫圈部件2061还包括垫圈孔部20611，垫圈孔部20611贯穿垫圈2061的上下表面，在本实施例中抵接部件孔部206d为垫圈孔部20611。
见图3a、3b，本实施例提供的阀芯部件202包括承载部件207和阀芯2023，承载部件207位于阀芯2023的上方，承载部件207与阀芯2023相抵，承载部件207或者第二弹性件204可以穿过垫圈孔部20611(在本实施例中，采用承载部件207穿过垫圈孔部20611的形式)。第二弹性件204与承载部件207相抵，第二弹性件204的弹力载荷可以通过承载部件207传递至阀芯2023。
在本实施例中，承载部件207包括第一伸入部2071、第二伸入部2072以及连接第一伸入部2071和第二伸入部2072的承载面部2073，第一伸入 部2071大致位于承载部件207的上方位置，第一伸入部2071伸入至第二弹性件204的下端部开口内，第二弹性件204的下端部与承载面部2073相抵。
图3a、3b中所示的阀芯转子组件20，是电动阀处于全关时的状态(即阀芯转子组件20处于其行程最下端时的状态)，结合图1所示，阀芯头部202a抵靠并紧压在阀口10a上，第一弹性件208和第二弹性件204均处于被压缩状态，也就是说阀芯部件202(承载部件207和阀芯2023)同时受到了两个向下的弹力，第一个向下的弹力来自于第一弹性件208被进一步压缩所产生的弹力，其通过垫圈部件2061、承载部件207传递施加于阀芯2023；第二个向下的弹力来自于第二弹性件204被压缩所产生的弹力，其通过承载部件207传递施加于阀芯2023。上述两个弹力叠加会提供阀芯部件202与阀口10a之间的压紧力，可以提高电动阀全关时抗逆向压差的性能指标。
本发明的电动阀与背景技术的电动阀相比，在第一弹性件208内还增设了第二弹性件204，第二弹性件204的弹力可与第一弹性件208的弹力进行叠加，从而可进一步提高作用在阀芯部件202的弹力，进一步提升电动阀全关时抗逆向压差的能力。
因第一弹性件208与第二弹性件204套装在一起，为了减少两者出现缠绕的可能性，优选的，第二弹性件204与第一弹性件208的螺旋旋向方向相反，可以减少第一弹性件208和第二弹性件204卡在一起的情况。
如图3a、3b中的电动阀的状态，承载部件207与垫圈部件2061相抵，垫圈部件2061被承载部件207顶起，具体的，在本实施例中，承载部件207包括第二阀芯抵接部202c(与垫圈部件2061相抵的部分)，垫圈部件2061包括第二抵接部206b(与承载部件207相抵的部分)。
在本实施例中，在阀轴组件201的横截面所在的平面，垫圈部件2061沿该平面的正投影与第二阀芯抵接部202c沿该平面的正投影存在重叠区域，因此，其垫圈部件2061能够与阀芯部件202(在本实施例中为承载部件207)相抵(当然，当垫圈部件2061和承载部件207之间设置有其他部件使其间接相抵时，可以不满足以上投影关系)，在本实施例中，垫圈孔部 20611与承载部件207的最外缘处都呈圆形，且垫圈孔部20611的直径小于承载部件207外轮廓的直径，承载部件207外轮廓的直径略小于第二阀轴内壁部20153的直径。
本实施例中，阀芯2023的顶部呈球顶状态，承载部件207的中心下侧与阀芯2023配合的部位呈凹球面状，两者顶紧配合时为点接触。此处采用点接触配合，可减小阀芯2023相对于承载部件207转动的摩擦阻力，理论上点接触的摩擦力臂为零，因此两者之间的摩擦阻力较小。
因此，当电动阀的阀芯头部202a与阀口10a接触后，阀芯2023相对于阀口10a发生相对转动的情况较少，从而可减少阀芯头部202a与阀口10a之间的转动摩擦，从而减少由于磨损而产生的阀口泄漏问题。
当然，阀芯2023的顶部与承载部件207的接触部位为点接触是理论状态，实际加工过程中难以确保两者的接触部位为点接触，结合实际使用，可采用小接触面接触，优选的，其两者接触面的面积小于7平方毫米。
见图4a，图4a是本发明电动阀开启到阀芯部件刚好不承载第一弹性件的弹力载荷时的阀体剖视图，图4b是图4a的局部放大图。图4a、4b中的阀芯转子组件20的位置与图1中电动阀全关时的转子位置相比，其阀芯转子组件20向上开启，阀芯头部202a仍然抵触于阀口10a。以图4a、4b所示的阀芯转子组件20的位置为临界点，阀芯转子组件20若继续向上开启，则第一弹性件208的弹力将通过垫圈部件2061的传递被台阶部20152所承载，承载部件207和阀芯2023将不再受到第一弹性件208的弹力载荷。此时第二弹性件204的弹力仍然通过承载部件207传递给阀芯2023，阀芯2023仍然受到第二弹性件204向下的弹力载荷。图4a、4b中所示的阀芯2023受到第二弹性件204向下的弹力作用，其阀芯头部202a抵触于阀口10a，第一阀芯抵接部202b距离阀轴抵接部20154的距离为h-k，且h-k＞0。
见图5a、5b，图5a是本发明电动阀开启到阀芯头部刚好不接触阀口时的阀体剖视图，图5b是图5a的局部放大图。图5a、5b中的阀芯转子组件20的位置与图4a、4b中的阀芯转子组件20的位置相比，其向上开启的高度为h-k，此时阀芯头部202a刚好处于抵接阀口10a的临界状态。阀 芯2023受第二弹性件204向下的弹力作用，其第一阀芯抵接部202b刚好接触到阀轴抵接部20154，第一弹性件208的弹力通过垫圈部件2061的传递，被台阶部20152所承载。承载部件207的第二阀芯抵接部202c与垫圈部件2061的第二抵接部206b距离为h-k，且h-k＞0。
图5a、5b所示的状态，是阀芯头部202a刚好处于接触阀口10a的临界状态，电动阀在需要频繁开关的过程中，当其阀芯头部202a与阀口10a刚好接触和分离的瞬间，两者密封部位之间的冲击力和磨损是较大的。在其阀芯头部202a刚好接触阀口10a的临界状态时(即图5a、5b所示的状态时)，其阀芯2023并不受到第一弹性件208的弹力载荷，只受到第二弹性件204的弹力载荷，此时垫圈部件2061受到第一弹性件208的弹力载荷大于阀芯部件202受到第二弹性件204的弹力载荷。因此本发明电动阀在阀芯2023与阀口10a接触和分离的瞬间，所受到的压紧力并不是特别大，因此可以减少阀芯2023与阀口10b之间发生的磨损，减少由于磨损而导致阀口10a泄漏的问题。
见图6a、6b，图6a是本发明电动阀开启到最大开度时的阀体剖视图，图6b是图6a的局部放大图。电动阀的阀芯转子组件20从图5a、5b所示的位置开启到图6a、6b所示的位置，顶杆主体部2051与外壳30接触，其阀芯2023始终受阀口10a两端压差力、第二弹性件204的弹力和其自身重力的作用，其第一阀芯抵接部202b始终抵触于阀轴抵接部20154，第一弹性件208的弹力通过垫圈部件2061的传递被台阶部20152所承载。阀芯转子组件20处于图6a、6b所示位置时，阀芯转子组件20开启到了其正常工作状态下的最大开度位置，此时阀芯转子组件20上端的顶杆主体部2051的顶端刚好接触到外壳30的顶部内壁。
见图7a、7b，图7a是本发明电动阀过度开启到螺纹副脱开螺合时的阀体剖视图，图7b是图7a的局部放大图。从图6a、6b所示的状态开始，若阀芯转子组件20继续向上开启，则会出现过度开启的状态(过度开启：是指阀芯转子组件20向上开启到了超过其规定的上限行程时的状态)，随着阀芯转子组件20向上运动，第二弹性件204被向下压缩，在图7a、7b中，第二弹性件204相对于图6a、6b中的状态被向下压缩的压缩量为m，阀芯 转子组件20受到第二弹性件204向下的弹力载荷。若阀芯转子组件20进一步过度开启，阀轴组件201外螺纹部201a会与螺母102的内螺纹部10b脱开螺合(即图7a、7b所示的状态)，脱开螺合后，阀芯转子组件20将不会再向上运动，若线圈40对阀芯转子组件20向电动阀关闭方向进行驱动，因阀芯转子组件20受到第二弹性件204向下的弹力载荷，阀芯转子组件20作旋转运动时，螺纹副会重新螺合。
由此可见，在本实施例中，第二弹性件204起到了两个作用：第一是电动阀全关状态时，第二弹性件204的弹力可加强阀芯2023与阀口10a的顶紧力，提高了电动阀抗逆向压差的能力；第二是电动阀过度开启时，第二弹性件204向下压紧阀轴组件201，可使过度开启脱开螺合的阀芯转子组件20复位。
结合图1、图4a、4b、图5a、5b和图6a、6b，转子部件20从全关状态到全开状态，从图4a、4b开度状态开始向上开启时，或者从图6a、6b全开状态向图4a、4b状态关闭时，阀芯2023不受到所述第一弹性件208的弹力载荷。特别是阀芯头部202a与阀口10a密封部开关接触的瞬间，阀芯部件202不受到第一弹性件208的弹力载荷，可以减少阀针部件202对阀口10a的冲击力，也可减小两者密封部之间相对旋转运动的摩擦力，从而可减少接触部位的磨损，提高电动阀的使用寿命。
见图4a、4b，本实施例中能实现上述功能效果的结构特征核心点是：在未设置其他部件使得某两个部件(阀轴组件201与垫圈部件2061、阀芯2023与阀轴组件201)间接相抵的情况下，台阶部20152与阀轴抵接部20154之间的高度h大于第一阀芯抵接部202b和第二阀芯抵接部202c之间的高度k，即h＞k。见图4b、图5b、图6b中，h＞k，实际上就是h-k＞0，因电动阀具有一定的开度行程，优选的h-k大于0，且小于0.3mm。
见图8a、8b，图8a是本发明电动阀第二实施例开启到最大开度时的阀体剖视图，图8b是图8a的局部放大图。
本实施例阀芯2023包括阀芯主体部2021和阀芯套2022，阀芯套2022包括阀芯套孔部20221，阀芯套孔部20221贯穿阀芯套2022的上下表面，阀芯主体部2021的上端穿过该阀芯套孔部20221，阀芯主体部2021和阀 芯套2022可以采用压装或焊接或粘结等方式固定连接。
此外，在本实施例中，阀芯头部202a直径设置的比第三阀轴内壁部20155的直径更大。阀芯主体部2021从下往上插装在阀轴2011的中心通孔之中，再将阀芯套2022从上往下套装并固定于阀芯主体部2021的大致上端位置。
当然，阀芯套孔部20221也可以采用盲孔的形式，即阀芯主体部2021与阀芯套2022固定连接，但是阀芯主体部2021没有从阀芯套孔部20221上方穿出，即，本发明的阀芯套孔部20221不局限于通孔的形式；亦或者阀芯套孔部20221为通孔的形式，但是阀芯主体部2021没有从阀芯套孔部20221上方穿出。
在本实施例中，阀芯套2022能够与阀轴抵接部20154相抵，阀芯套2022包括第一阀芯抵接部202b，承载部件207能够承载第二弹性件204的弹力载荷，并将第二弹性件204的弹力载荷传递至阀芯2023，承载部件207包括第三阀芯抵接部202d，垫圈部件2061能够被承载部件207支撑并远离台阶部20152，承载部件207包括第二阀芯抵接部202c。
见图9a、9b，图9a是本发明电动阀第三实施例开启到最大开度时的阀体剖视图，图9b是图9a的局部放大图。
与同开度状态的图8a、8b中的第二实施例相比，本实施例的区别主要在于：承载部件207的部分位于阀芯套2022内，在阀芯部件202相对于阀轴组件201上升的过程中，垫圈部件2061被阀芯套2022的上端面支撑顶起,在本实施例中，阀芯套2022包括第二阀芯抵接部202c。
见图10a、10b，图10a是本发明电动阀第四实施例开启到最大开度时的阀体剖视图，图10b是图10a的局部放大图。与同开度状态的图8a、8b中的第二实施例相比，阀芯套2022的结构略有不同，该阀芯套孔部20221的为盲孔结构，且阀芯套2022的顶部呈球面状态，其顶面与承载部件207中心下侧的凹面接触配合。本实施例其他部位的结构方案可与图8a、8b中的第二实施例相同或相近。
见图11a、11b，图11a是本发明电动阀第五实施例开启到最大开度时的阀体剖视图，图11b是图11a的局部放大图。与图5a、5b中的第一实施 例相比，其区别主要在于，阀芯2023顶部的凸起球面变成了凹球面，而承载部件207下侧的凹球面变成了凸起球面，变更后两者配合的功效相同；此外，阀芯2023采用了分体加工两个零部件再将该两个零部件固定连接的方式。本实施例其他部位的结构方案可与图5a、5b中的第一实施例相同或相近。
见图12a、12b，图12a是本发明电动阀第六实施例开启到最大开度时的阀体剖视图，图12b是图12a的局部放大图。与图11a、11b中的第五实施例相比，区别主要在于：阀芯2023的顶部设置了钢球容纳部202e，钢球容纳部202e为设置于阀芯2023顶部的槽，在钢球容纳部202e内设置了一个钢球2024，钢球2024的球面顶部与承载部件207的下端面接触实现点接触。因钢球2024表面更光滑，且其硬度和耐磨性更高，因此可进一步提升电动阀的上述运动接触部位的寿命。本实施例其他部位的结构方案可与图11a、11b中的第五实施例相同或相近。
见图13a、13b，图13a是本发明电动阀第七实施例电动阀处于全关状态时的阀体剖视图，图13b是图13a的局部放大图。与图4a、4b中的第一实施例相比，区别主要在于，阀芯部件202的结构发生了变化，具体的，阀芯2023与承载部件207所对应的部位为一体式结构，此时，阀芯部件202包括第一阀芯抵接部202b、第二阀芯抵接部202c和第三阀芯抵接部202d。
见图14a、14b，图14a是本发明电动阀第八实施例电动阀处于全关状态时的阀体剖视图，图14b是图14a的局部放大图。与图13a、13b中的第七实施例相比，区别主要在于，阀芯部件202并没有穿过垫圈孔部20611，第二弹性件204穿过垫圈孔部20611与阀芯部件202相抵。
见图15a、15b，图15a是本发明电动阀第九实施例开启到最大开度时的阀体剖视图，图15b是图15a的局部放大图。与图11a、11b中的第五实施例相比，承载部件207的结构发生了变化，本实施例的区别主要在于，承载部件207并没有从垫圈孔部20611穿出，第二弹性件204穿过垫圈孔部20611与承载部件207相抵。
见图16a、16b，图16a是本发明电动阀第十实施例电动阀处于全关状 态时的阀体剖视图，图16b是图16a的局部放大图。
在本实施例中，阀轴组件201的结构发生了变化，具体的，阀轴组件201包括阀轴主体部2013和筒状件2014，阀轴主体部2013具有上下贯通的通孔，阀轴主体部2013设置有外螺纹部201a，阀轴主体部2013与筒状件2014固定连接，两者固定连接后的中心通孔的大致侧壁区域形成阀轴内壁部2015，在本实施例中，阀轴主体部2013的上端部分伸入至筒状件2014的通孔内，当然，也可以采用阀轴主体部2013不伸入至筒状件2014的通孔内、将阀轴主体部2013固定于筒状件2014的下端的形式。筒状件2014大致呈中空圆筒状，筒状件2014的大致上方设置有筒状件抵接部20141，在筒状件抵接部20141的大致中心位置设置有筒状件通孔部201411，在阀轴组件201的横截面所在的平面，筒状件通孔部201411沿该平面的正投影位于顶杆主体部2051沿该平面的正投影外，且位于顶杆抵靠部2052沿该平面的正投影内，在本实施例中，筒状件通孔部201411的直径大于顶杆主体部2051的直径，小于顶杆抵靠部2052的直径，因此顶杆抵靠部2052能够与筒状件抵接部20141相抵。
在本实施例中，阀芯2023能够与阀轴主体部2013的上端面相抵，阀轴主体部2013的上端面形成阀轴抵接部20154，第一弹性件208、第二弹性件204被容纳在所述筒状件2014和阀轴主体部2013限定的空间内，筒状件抵接部20141与第一弹性件208相抵，筒状件抵接部20141能够与顶杆抵靠部2052相抵，因此在本实施例中筒状件抵接部20141包括弹簧抵接部20a，顶杆主体部2051能够从筒状件通孔部201411穿出与外壳30相抵。
继续参考图16a、16b，本实施例提供的抵接部件206包括抵接架2062，抵接架2062能够与阀轴抵接部20154相抵。具体的，抵接架2062大致呈筒状结构，其包括位于顶部的抵接架顶部20621和大致沿着抵接架顶部20621的周向边缘向下延伸而形成的抵接架侧部20622。
此外，在本实施例中，阀轴内壁部2015没有设置台阶部20152，具体的，第一阀芯抵接部202b能够与阀轴抵接部20154相抵，抵接架2062套设于阀芯2023，且抵接架2062的抵接架侧部20622的下端抵接于阀轴抵接部20154(因此阀轴内壁部2015可以不设置台阶部20152，台阶部20152 的功能由阀轴抵接部20154实现)，本实施例中抵接架2062包括第三抵接部206c(与阀轴抵接部20154相抵的部分)，此外，抵接架顶部20621与第一弹性件208相抵，本实施例中抵接架2062包括第一抵接部206a。
此外，在本实施例中，抵接架2062还包括抵接架孔部20623，抵接架孔部20623贯穿抵接架顶部20621的上下表面，承载部件207的上端穿过抵接架孔部20623，承载部件207的上端穿入第二弹性件204且位于第二弹性件204的通孔内缘，此时抵接部件孔部206d为抵接架孔部20623。
通过以上设置，第二弹性件204欲发生径向偏移时，能够受到承载部件207的限制，可以减少第二弹性件204的径向偏移，第二弹性件204在电动阀内更加稳定，有利于增加电动阀的使用寿命。
在本实施例中，阀轴抵接部20154到第二抵接部206b的高度为h，第一阀芯抵接部202b到第二阀芯抵接部202c距离为k，如图16a、16b所示的状态，第二抵接部206b和第二阀芯抵接部202c处于刚好接触的状态，此时第一阀芯抵接部202b与阀轴抵接部20154的存在距离h-k。
相对于当第一阀芯抵接部202b与阀轴抵接部20154相抵时的状态，当阀芯部件202相对于阀轴组件201上升h-k的距离时，抵接架2062的抵接架顶部20621与第二阀芯抵接部202c接触，抵接架顶部20621包括第二抵接部206b，第一阀芯抵接部202b与阀轴抵接部20154从相抵的状态变成非相抵的状态，当阀芯部件202相对于阀轴组件201进一步上升时，抵接架2062的第二抵接部206b与第二阀芯抵接部202c相抵，阀芯部件202受到第一弹性件208的弹力载荷，第一弹性件208的弹力可以通过阀芯2023传递至阀口10a。
当然，对于实施例来说，没有设置台阶部20152，但是对于本申请来说，台阶部20152也是可以设置的，例如可以在阀轴内壁部2015设置台阶部20152，台阶部20152能够与抵接架侧部20622的下端相抵，也可以实现本申请的技术效果。
见图17a、17b，图17a是本发明电动阀第十一实施例开启到最大开度时的阀体剖视图，图17b是图17a的局部放大图。
在本实施例中，与图13a、13b中的第七实施例相比，区别主要在于， 阀芯部件202设置有阀芯主体部2021和阀芯套2022，阀芯主体部2021与阀芯套2022固定连接，在本实施例中，阀芯主体部2021包括第三阀芯抵接部202d，阀芯套2022包括第一阀芯抵接部202b和第二阀芯抵接部202c。阀芯主体部2021穿过垫圈孔部20611，第二弹性件204与阀芯主体部2021相抵。
当然，也可以采用阀芯主体部2021没有穿过垫圈孔部20611，第二弹性件204穿过垫圈孔部20611与阀芯部件202相抵的形式。
见图18a、18b，图18a是本发明电动阀第十二实施例电动阀开启到最大开度时的阀体剖视图，图18b是图18a的局部放大图。与图10a、10b中的第四实施例相比，区别主要在于，阀芯部件202的结构发生了变化，具体的，阀芯套2022与承载部件207所对应的部位为一体式结构，在本实施例中，阀芯套2022包括第一阀芯抵接部202b、第二阀芯抵接部202c和第三阀芯抵接部202d。
当然，在本实施例中，其抵接部件206也可以采用抵接架2062的形式，阀轴组件201也可以采用阀轴主体部2013和筒状件2014的形式，本实施例以一种阀芯部件202的结构进行描述，该阀芯部件202与其他部件的形式并不冲突与矛盾。
因此，本发明的阀芯部件202，其阀芯主体部2021、阀芯套2022以及承载部件207可以全部一体加工成型，也可以择二一体加工成型，亦或者三者都为分体加工的形式。
因此，对电动阀的一些零部件进行常规的分隔、整合等改变，但其组装后其几何对应部分的功能基本相同，其仍属于本发明的构思，例如图8a、8b中对阀芯部件202结构相对于图7a、7b第一实施例中的阀芯部件202结构，其结构发生了一定的变化，但是其实质上并未改变其几何对应部位功能，这些做适应性变更组合的结构，也落入本发明专利权利要求保护的范围。
此外，要说明的是本说明书中所示的实施例中，可以在在第二弹性件204的下端增设垫圈或者垫片、或者在第一阀芯抵接部202b和阀轴抵接部20154之间设置垫圈、或者在第二弹性件204上端增设垫圈或者垫片、或 者在承载部件207和阀芯2023之间增设垫圈或者垫片，以上方式并不影响本申请的核心内容，本申请的两个部件相抵，包括两个部件直接相抵亦或者两个部件通过其他零部件间接相抵。
在以上的实施例中，采用了顶杆205可以与外壳30相抵的形式，当然，也可以在外壳30连接其他部件，顶杆205与该部件可以相抵的形式。
此外，在上述垫圈或者垫片受到旋转摩擦配合的上、下表面，为了进一步减小其相对旋转的摩擦阻力，可以在其表面喷涂或镀覆具有润滑耐磨功能的涂层(例如含有聚四氟乙烯，或者含有石墨，或者含有二硫化钼成分的涂层)，从而提高电动阀的使用寿命。
基于上述实施例的基础上，利用本发明的核心构造，在增设减磨垫圈或垫片方面做一些适应性的改变，均应落入本发明专利权利要求保护的范围。
值得说明的是，在上述关于阀口10a的形成方式和是否设置接管等，本方案提供了多种方案，且在说明书中用了“可以”的标注，因此可以理解，并不能将本申请的“可以”理解为“必须”。
本发明所述的a或b，在a和b并不冲突的情况下，包括a、b和ab三者情况，a、b指代结构特征或者连接关系或者技术方案等。
需要说明的是，本实施例所提及的上、下、左、右等方位名词，均是以说明书附图作为基准，为便于描述而引入的；以及部件名称中的“第一”、“第二”等序数词，也是为了便于描述而引入的，并不意味着对部件的任何次序作出任何的限定。
以上对本发明所提供的电动阀进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (21)

  1. 一种电动阀，其特征在于，包括阀体，所述阀体包括阀座部件(10)和阀芯转子组件(20)，所述阀芯转子组件(20)包括阀轴组件(201)、阀芯部件(202)、第一弹性件(208)、第二弹性件(204)以及抵接部件(206)；
    所述阀轴组件(201)包括阀轴抵接部(20154)；
    所述阀芯部件(202)包括第一阀芯抵接部(202b)，所述第一阀芯抵接部(202b)能够与所述阀轴抵接部(20154)相抵；
    所述第一弹性件(208)的上端部与所述阀轴组件(201)相抵，所述抵接部件(206)包括第一抵接部(206a)，所述第一弹性件(208)的下端部与所述第一抵接部(206a)相抵，所述抵接部件(206)包括第二抵接部(206b)，所述阀芯部件(202)包括第二阀芯抵接部(202c)，所述第二抵接部(206b)能够与所述第二阀芯抵接部(202c)相抵，所述抵接部件(206)包括第三抵接部(206c)，所述第三抵接部(206c)能够与所述阀轴组件(201)相抵；
    所述第一弹性件(208)外套于所述第二弹性件(204)，所述第二弹性件(204)的上端部与所述阀轴组件(201)相抵，所述抵接部件(206)包括抵接部件孔部(206d)，所述阀芯部件(202)包括第三阀芯抵接部(202d)，所述第二弹性件(204)的下端部与所述第三阀芯抵接部(202d)相抵，所述第二弹性件(204)的部分或所述第三阀芯抵接部(202d)的部分位于所述抵接部件孔部(206d)内；
    所述阀座部件(10)包括阀口(10a)，所述阀芯部件(202)能够与所述阀口(10a)相抵；
    当所述第三抵接部(206c)与所述阀轴组件(201)相抵、所述第一阀芯抵接部(202b)与所述阀轴抵接部(20154)相抵时，所述第一弹性件(208)的弹力被所述阀轴组件(201)承载，所述抵接部件(206)受到所述第一弹性件(208)的弹力大于所述阀芯部件(202)受到所述第二弹性件(204)的弹力。
  2. 根据权利要求1所述的电动阀，其特征在于，当第三抵接部(206c)与所述阀轴组件(201)不相抵、所述第一阀芯抵接部(202b)与所述阀轴 抵接部(20154)不相抵时，所述第一弹性件(208)的弹力和所述第二弹性件(208)的弹力被所述阀芯部件(202)承载。
  3. 根据权利要求1或2的电动阀，其特征在于，所述抵接部件(206)包括垫圈部件(2061)，所述阀轴内壁部(2015)包括台阶部(20152)，所述垫圈部件(2061)与所述第一弹性件(208)相抵，所述垫圈部件(2061)包括所述第一抵接部(206a)，所述垫圈部件(2061)能够与所述第二阀芯抵接部(202c)相抵，所述垫圈部件(2061)包括所述第二抵接部(206b)，所述垫圈部件(2061)能够与所述台阶部(20152)相抵，所述垫圈部件(2061)包括所述第三抵接部(206c)，所述垫圈部件包括垫圈孔部(20611)，所述阀芯部件(202)或者所述第二弹性件(204)穿过所述抵接部件孔部(20611)，所述抵接部件孔部(206d)包括所述垫圈孔部(20611)。
  4. 根据权利要求1或2的电动阀，其特征在于，所述抵接部件(206)包括所述抵接架(2062)，所述抵接架(2062)包括所述抵接架顶部(20621)和所述抵接架侧部(20622)，所述抵接架顶部(20621)与所述第一弹性件(208)相抵，所述抵接架顶部(20621)包括所述第一抵接部(206a)，所述抵接架顶部(20621)能够与所述第二阀芯抵接部(202c)相抵，所述抵接架顶部(20621)包括所述第二抵接部(206b)，所述抵接架侧部(20622)能够与所述阀轴组件(201)相抵，所述抵接架侧部(20622)包括所述第三抵接部(206c)，所述抵接架(2062)包括抵接架孔部(20623)，所述阀芯部件(202)或者所述第二弹性件(204)穿过所述抵接架孔部(20623)，所述抵接部件孔部(206d)包括所述抵接架孔部(20623)。
  5. 根据权利要求1或2所述的电动阀，其特征在于，所述阀轴组件(201)包括阀轴(2011)和衬套(2012)，所述衬套(2012)与所述阀轴(2011)固定连接，所述第一弹性件(208)的上端部与所述衬套(2012)相抵，所述第二弹性件(204)的上端部与所述衬套(2012)相抵。
  6. 根据权利要求1或2所述的电动阀，其特征在于，所述阀轴组件(201)包括阀轴本体部(2013)和筒状件(2014)，所述阀轴本体部(2013)和所述筒状件(2014)固定连接，所述筒状件(2014)包括筒状件抵接部(20141)，所述第一弹性件(208)的上端部与所述筒状件抵接部(20141)相抵，所 述第二弹性件(204)的上端部与所述筒状件抵接部(20141)相抵，所述阀轴主体部(2013)包括所述阀轴抵接部(20154)。
  7. 根据权利要求1或2所述的电动阀，其特征在于，所述阀芯部件(202)包括承载部件(207)和阀芯(2023)，所述阀芯(2023)能够与所述阀轴抵接部(20154)相抵，所述阀芯(2023)包括所述第一阀芯抵接部(202a)，所述承载部件(207)相对与所述阀芯(2023)更靠近所述第二弹性件(204)，所述承载部件(207)或者所述第二弹性件(204)穿过所述抵接部件孔部(206d)，所述承载部件(207)与所述第二弹性件(204)相抵，所述承载部件(207)包括所述第三阀芯抵接部(202d)，所述承载部件(207)与所述阀芯(2023)相抵，所述第二弹性件(204)的弹力载荷通过所述承载部件(207)传递至所述阀芯(2023)。
  8. 根据权利要求7所述的电动阀，其特征在于，所述承载部件(207)能够与所述第二抵接部(206b)相抵，所述承载部件(207)包括所述第二阀芯抵接部(202c)；或，所述阀芯(2023)能够与所述第二抵接部(206b)相抵，所述阀芯(2023)包括所述第二阀芯抵接部(202c)。
  9. 根据权利要求8所述的电动阀，其特征在于，所述阀芯(2023)包括阀芯主体部(2021)和阀芯套(2022)，所述阀芯套(2022)包括阀芯套孔部(20221)，所述阀芯主体部(2021)的部分位于所述阀芯套孔部(20221)内，所述阀芯主体部(2021)与所述阀芯套(2022)固定连接。
  10. 根据权利要求9所述的电动阀，其特征在于，所述阀芯套孔部(20221)为通孔，所述阀芯主体部(2021)穿过所述阀芯套孔部(20221)，所述阀芯主体部(2021)与所述承载部件(207)相抵，或，所述阀芯套孔部(20221)为通孔，所述阀芯主体部(2021)的上端位于所述阀芯套孔部(20221)内，所述阀芯套(2022)与所述承载部件(207)相抵，或，所述阀芯套孔部(20221)为盲孔，所述阀芯套(2022)与所述承载部件(207)相抵。
  11. 根据权利要求7-10任一项所述的电动阀，其特征在于，所述承载部件(207)的部分位于所述第二弹性件(204)内。
  12. 根据权利要求7-10任一项所述的电动阀，其特征在于，所述阀芯 转子组件(20)还包括钢球(2024)，所述阀芯(2023)还包括钢球容纳部(202e)，所述钢球容纳部(202e)为设置于所述阀芯(2023)的槽，所述钢球(2024)的部分位于所述钢球容纳部(202e)，所述承载部件(207)受到所述第二弹性件(204)的弹力载荷通过所述钢球(2024)传递至所述阀芯(2023)。
  13. 根据权利要求1-7任一项所述的电动阀，其特征在于，所述第一弹性件(208)和所述第二弹性件(204)为弹簧，所述第一弹性件(208)和所述第二弹性件(204)的螺旋旋向相反。
  14. 根据权利要求1-10任一项所述的电动阀，其特征在于，所述阀芯转子组件(20)还包括顶杆(205)；
    所述阀轴组件(201)包括弹簧抵接部(20a)；
    所述顶杆(205)包括顶杆主体部(2051)和顶杆抵靠部(2052)，所述顶杆主体部(2051)的部分从所述阀轴组件(201)的上端部分的通孔伸出；
    所述第二弹性件(204)的上端部与所述顶杆抵靠部(2052)相抵，所述顶杆抵靠部(2052)能够与所述弹簧抵接部(20a)相抵。
  15. 根据权利要求14所述的电动阀，其特征在于，所述顶杆主体部(2051)包括第一顶杆主体部(20511)和第二顶杆主体部(20512)，所述第一顶杆主体部(20511)位于所述顶杆抵靠部(2052)的上方，所述第一顶杆主体部(20511)的部分从所述阀轴组件(201)的上端部分的通孔伸出，所述第二顶杆主体部(20512)位于所述顶杆抵靠部(2052)的下方；所述第二顶杆主体部(20512)伸入至所述第二弹性件(204)的上端部开口内。
  16. 根据权利要求15所述的电动阀，其特征在于，所述阀芯部件(202)包括承载部件(207)和阀芯(2023)，所述承载部件(207)包括第一伸入部(2071)，所述第一伸入部(2071)伸入至所述第二弹性件(204)的下端部开口内。
  17. 根据权利要求16所述的电动阀，其特征在于，所述承载部件(207)和所述阀芯(2023)为分体式结构，所述承载部件(207)位于所述阀芯(2023) 的上方，所述承载部件(207)与所述阀芯(2023)相抵。
  18. 根据权利要求14所述的电动阀，其特征在于，所述顶杆抵靠部(2052)位于所述第一弹性件(208)上端部开口内，所述第一弹性件(208)的上端部能够与所述弹簧抵接部(20a)相抵。
  19. 根据权利要求16所述的电动阀，其特征在于，所述承载部件(207)包括第二伸入部(2072)，所述第二伸入部(2072)穿过所述抵接部件孔部(206d)，所述第二伸入部(2072)的上端伸入至所述第一弹性件(208)的下端部开口内；所述第三阀芯抵接部(202d)位于所述第一伸入部(2071)和所述第二伸入部(2072)之间。
  20. 根据权利要求14所述的电动阀，其特征在于，所述阀体包括外壳(30)；
    所述阀座部件(10)包括螺母(102)，所述螺母(102)包括内螺纹部(10b)；所述阀座部件(10)与所述外壳(30)固定连接；
    所述阀轴组件(201)包括外螺纹部(201a)，所述外螺纹部(201a)能够与所述内螺纹部(10b)螺纹配合。
  21. 根据权利要求20所述的电动阀，其特征在于，所述阀芯部件(202)包括阀芯头部(202a)，所述电动阀包括以下至少一种工作状态：
    所述外螺纹部(201a)与所述内螺纹部(10b)螺纹配合；所述阀芯头部(202a)与所述阀口(10a)相抵，所述第一阀芯抵接部(202b)与所述阀轴抵接部(20154)未相抵；所述第二抵接部(206b)与所述第二阀芯抵接部(202c)相抵，所述第三抵接部(206c)与所述阀轴组件(201)未相抵，所述顶杆抵靠部(2052)与所述弹簧抵接部(20a)相抵，所述顶杆主体部(2051)与所述外壳(30)未相抵；
    所述外螺纹部(201a)与所述内螺纹部(10b)螺纹配合；所述阀芯头部(202a)与所述阀口10a相抵，所述第一阀芯抵接部(202b)与所述阀轴抵接部(20154)未相抵；所述第二抵接部(206b)与所述第二阀芯抵接部(202c)接触但不相抵，所述第三抵接部(206c)与所述阀轴组件(201)相抵，所述顶杆抵靠部(2052)与所述弹簧抵接部(20a)相抵，所述顶杆主体部(2051)与所述外壳(30)未相抵；
    所述外螺纹部(201a)与所述内螺纹部(10b)螺纹配合；所述阀芯头部202a与所述阀口10a接触但不相抵，所述第一阀芯抵接部(202b)与所述阀轴抵接部(20154)相抵；所述第二抵接部(206b)与所述第二阀芯抵接部(202c)未相抵，所述第三抵接部(206c)与所述阀轴组件(201)相抵，所述顶杆抵靠部(2052)与所述弹簧抵接部(20a)相抵，所述顶杆主体部(2051)与所述外壳(30)未相抵；
    所述外螺纹部(201a)与所述内螺纹部(10b)螺纹配合；所述阀芯头部202a与所述阀口10a未相抵，所述第一阀芯抵接部(202b)与所述阀轴抵接部(20154)相抵；所述第二抵接部(206b)与所述第二阀芯抵接部(202c)未相抵，所述第三抵接部(206c)与所述阀轴组件(201)相抵，所述顶杆抵靠部(2052)与所述弹簧抵接部(20a)相抵，所述顶杆主体部(2051)与所述外壳(30)接触但不相抵；
    所述外螺纹部(201a)未与所述内螺纹部(10b)螺纹配合；所述阀芯头部202a与所述阀口10a未相抵，所述第一阀芯抵接部(202b)与所述阀轴抵接部(20154)相抵；所述第二抵接部(206b)与所述第二阀芯抵接部(202c)未相抵，所述第三抵接部(206c)与所述阀轴组件(201)相抵，所述顶杆抵靠部(2052)与所述弹簧抵接部(20a)未相抵，所述顶杆主体部(2051)与所述外壳(30)相抵。
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CN114838187B (zh) 2023-06-02
CN114838186A (zh) 2022-08-02

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