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WO2021103753A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2021103753A1
WO2021103753A1 PCT/CN2020/115627 CN2020115627W WO2021103753A1 WO 2021103753 A1 WO2021103753 A1 WO 2021103753A1 CN 2020115627 W CN2020115627 W CN 2020115627W WO 2021103753 A1 WO2021103753 A1 WO 2021103753A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
rotation
electronic expansion
seat
nut seat
Prior art date
Application number
PCT/CN2020/115627
Other languages
English (en)
French (fr)
Inventor
曾庆军
贺宇辰
徐冠军
Original Assignee
浙江盾安人工环境股份有限公司
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 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Priority to JP2022527955A priority Critical patent/JP7355937B2/ja
Priority to KR1020227019366A priority patent/KR102809319B1/ko
Publication of WO2021103753A1 publication Critical patent/WO2021103753A1/zh

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Classifications

    • 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
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F16K1/02—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 with screw-spindle
    • 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
    • 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
    • F16K1/42—Valve seats
    • 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
    • F16K1/42—Valve seats
    • F16K1/425—Attachment of the seat to the housing by plastical deformation, e.g. valve seat or housing being plastically deformed during mounting
    • 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
    • F16K1/50—Preventing rotation of valve members
    • 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
    • F16K25/00—Details relating to contact between valve members and seats
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or 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

  • This application relates to the technical field of electronic expansion valves, and in particular to an electronic expansion valve.
  • the electronic expansion valve includes a housing, a nut seat, a screw and a valve needle, and the nut seat, the screw and the valve needle are all arranged in the housing.
  • the housing includes a valve seat and a sleeve, and the valve seat is provided with a valve port.
  • the nut seat is welded and fixed with the upper end surface of the valve seat through the connecting piece, the screw is movably inserted in the nut seat, the valve needle is arranged at the end of the screw near the valve port, and the screw drives the valve needle to move to achieve the valve port Opening and closing.
  • the nut seat is located above the valve seat, and the connecting piece is used to weld the nut seat to the valve seat. Under the stress generated by welding, the nut seat will move, and the coaxiality of the nut seat and the valve seat cannot be guaranteed. degree. Therefore, there is a problem of poor coaxiality of the nut holder in the related art.
  • the present application provides an electronic expansion valve to solve the problem of poor coaxiality of the nut seat in the related art.
  • the present application provides an electronic expansion valve.
  • the electronic expansion valve includes: a housing including a sleeve and a valve seat connected to each other, the valve seat having a first mounting hole; a screw rod movably arranged in the housing; a nut assembly including The nut seat and the limiting member.
  • the screw rod is inserted in the nut seat.
  • the nut seat includes a stepped thread section and a guide section. The diameter of the thread section is smaller than the diameter of the guide section.
  • the guide section is inserted in the first mounting hole to limit the position.
  • the upper end surface of the guide section is attached to and fixedly connected to the valve seat.
  • the limit member is used to upper limit the nut seat.
  • a limit structure is set between the lower end surface of the guide section and the inner wall of the valve seat. The limit structure is used for alignment.
  • the nut seat performs a lower limit.
  • a limiting protrusion is provided on the inner wall of the valve seat, and the lower end surface of the guide section abuts against the limiting protrusion, and the limiting protrusion forms a limiting structure.
  • the first mounting hole has a first section and a second section connected to each other, the first section is located above the second section, the inner diameter of the first section is larger than the inner diameter of the second section, and the guide section is inserted in the first section , The end surface of the second section facing the first section forms a limiting protrusion.
  • an anti-rotation structure is provided between the limiting member and the nut seat, and the anti-rotation structure is used for restricting the rotation of the nut seat relative to the valve seat.
  • the limit piece includes a limit ring
  • the nut seat also includes a rotation stop section, one end of the rotation stop section is connected with the threaded section, the other end of the stop rotation section is connected with the guide section, and the limit ring is sleeved on the rotation stop section ,
  • the anti-rotation structure is arranged between the anti-rotation section and the limit ring.
  • one of the anti-rotation section and the limit ring is provided with a anti-rotation convex portion, and the other of the anti-rotation section and the limit ring is provided with a anti-rotation groove, and the anti-rotation convex portion is matched with the anti-rotation groove Form a non-rotating structure.
  • the nut seat is provided with a balance channel
  • the first mounting hole forms a valve cavity
  • the nut seat has a nut cavity
  • one end of the balance channel is connected with the valve cavity
  • the other end of the balance channel is connected with the nut cavity.
  • the balance passage includes a first communication section and a second communication section that communicate with each other.
  • One end of the first communication section is in communication with the nut cavity, one end of the second communication section is in communication with the valve cavity, and the first communication section is along the diameter of the nut seat.
  • the second connecting section is arranged along the axial direction of the nut seat.
  • a first notch is provided on the outer wall of the rotation stop section, a first communication hole is provided in the first notch, and the first notch and the first communication hole cooperate to form a first communication section.
  • two anti-rotation protrusions are provided on the anti-rotation section at intervals, the two anti-rotation protrusions are symmetrically arranged on both sides of the anti-rotation section, and the opening direction of the first communication hole is connected to the two anti-rotation protrusions Phase perpendicular.
  • the sleeve has a sleeve cavity
  • the outer wall of the guide section is provided with a second notch
  • the second notch forms a second communicating section
  • the limiting ring is provided with a second communicating hole
  • the second communicating hole communicates with the second notch , So that the casing cavity and the valve cavity are connected.
  • the outer wall of the guide section is provided with a plurality of second notches, the plurality of second notches are symmetrically arranged along the circumference of the guide section, and at least one second notch is communicated with the first communication section.
  • the electronic expansion valve also includes a valve seat core, the valve seat is provided with a second mounting hole, the valve seat core penetrates the second mounting hole, the second mounting hole is a stepped hole, and the outer wall of the valve seat core is provided with Stepped boss, the shape and size of the stepped boss is adapted to the shape and size of the stepped hole.
  • the guide section has a cylindrical structure
  • a first mounting boss is provided in the guide section
  • the first mounting boss is arranged coaxially with the nut seat
  • the top of the valve seat core is provided with a second mounting boss
  • the second mounting boss The platform is coaxially arranged with the valve seat core
  • the electronic expansion valve further includes a guide sleeve, one end of the guide sleeve is sleeved on the first installation boss, and the other end of the guide sleeve is sleeved on the second installation boss.
  • the nut base also includes a screw guide section, the screw guide section, the thread section, the anti-rotation section, and the guide section are sequentially connected from top to bottom.
  • the guide section is provided with a first mounting boss coaxial with the nut base, and the nut
  • the seat has a through hole along the axial direction, and the inner diameter of the screw guide section, the inner diameter of the threaded section, the inner diameter of the anti-rotation section and the inner diameter of the first mounting boss decrease in sequence.
  • the screw is movably inserted in the nut seat, the screw is threaded with the threaded section, the screw guide section is used to guide the screw, the upper end of the screw is reduced in diameter to form an inner step
  • the electronic expansion valve further includes: a valve needle ,
  • the valve needle is inserted in the nut seat and the screw, the first mounting boss has an inner hole for guiding the valve needle, the screw applies a downward driving force to the valve needle through the inner step;
  • the positioning part the valve needle has an interconnected The third section and the fourth section, the diameter of the third section is smaller than the diameter of the fourth section, the third section is located above the fourth section and extends out of the upper part of the screw, the positioning member is fixed at the end of the third section, and the screw passes The positioning member applies an upward driving force to the valve needle; the spring is sleeved on the third section and arranged between the fourth section and the inner step.
  • the spring indirectly abuts the end surface and/or the inner step of the fourth section through the washer.
  • the electronic expansion valve includes a housing, a screw and a nut assembly, and the screw is movably arranged in the housing.
  • the housing includes a sleeve and a valve seat connected to each other, the valve seat has a first mounting hole, the nut assembly includes a nut seat and a limiting member, and the screw rod is inserted in the nut seat.
  • the nut base includes a threaded section and a guide section arranged in steps, and the diameter of the threaded section is smaller than the diameter of the guide section.
  • the limit piece can be used to upper limit the nut seat to prevent the nut seat from coming out of the valve seat. Prolapse.
  • a limit structure is provided between the lower end surface of the guide section and the inner wall of the valve seat. The limit structure can be used to lower the nut seat to fix the nut seat in the valve seat.
  • Fig. 1 shows a cross-sectional view of an electronic expansion valve according to a first embodiment of the present application
  • Figure 2 shows a partial enlarged view of A in Figure 1;
  • Fig. 3 shows a partial enlarged view at B in Fig. 1;
  • Fig. 4 shows a schematic diagram of the structure of the nut seat in Fig. 1;
  • Fig. 5 shows another structural schematic diagram of the nut seat in Fig. 1;
  • Figure 6 shows an assembly diagram of the nut assembly and the valve seat in Figure 1;
  • Figure 7 shows a cross-sectional view of the nut seat in Figure 1;
  • Fig. 8 shows a cross-sectional view of an electronic expansion valve provided according to the second embodiment of the present application.
  • Valve needle 71, the third section; 72, the fourth section;
  • Rotor assembly 110. Rotor core; 120. Rotor connecting plate; 130. Fixing frame.
  • the first embodiment of the present application provides an electronic expansion valve.
  • the electronic expansion valve includes a housing 10, a screw 20, and a nut assembly 30.
  • the screw 20 and the nut assembly 30 are both arranged in the housing 10.
  • the screw 20 can move in the housing 10.
  • the housing 10 includes a sleeve 11 and a valve seat 12 that are connected to each other.
  • the valve seat 12 has a first mounting hole 121.
  • the nut assembly 30 includes a nut seat 31 and a limiting member 32.
  • the screw rod 20 is inserted into the nut seat 31.
  • One end of the nut seat 31 is inserted into the first mounting hole 121.
  • the nut holder 31 includes a threaded section 311 and a guide section 312 that are arranged in steps.
  • the diameter of the threaded section 311 is smaller than the diameter of the guide section 312, and the threaded section 311 is located above the guide section 312.
  • the guiding section 312 can be used to guide the nut base 31 to ensure the coaxiality of the nut base 31.
  • the guide section 312 and the first mounting hole 121 are interference fit.
  • the limit member 32 is attached to the upper end surface of the guide section 312 and fixedly connected to the valve seat 12, and the limit member 32 can be used to limit the nut seat 31 , To prevent the nut holder 31 from falling out of the first mounting hole 121.
  • a limit structure is provided between the lower end surface of the guide section 312 and the inner wall of the valve seat 12, and the limit structure can be used to lower the nut seat 31 to realize the fixation of the nut seat 31 and prevent the nut seat 31 from being over-pressed to Inside the first mounting hole 121.
  • the guide section 312 can be used to guide the nut seat 31 through the cooperation of the guide section 312 with the first mounting hole 121, and the coaxiality of the nut seat 31 can be ensured.
  • the limiting structure can lower the nut seat 31 to prevent the nut seat 31 from being excessively inserted into the first mounting hole 121.
  • the limiting member 32 is attached to the upper end surface of the guide section 312 It suffices to combine the limiting member 32 and the valve seat 12 to be fixedly connected, which facilitates assembly and can improve the assembly accuracy, and thus can further improve the coaxiality of the nut seat 31.
  • the limiting member 32 is fixedly connected to the valve seat 12 by welding. Since the guide section 312 of the nut seat 31 is press-fitted in the first mounting hole 121, when the limiting member 32 is welded, the nut The seat 31 will not move, so that the coaxiality of the nut seat 31 can be ensured. In this embodiment, the upper end surface of the guide section 312 is flush with the upper end surface of the valve seat 12.
  • a limiting protrusion 122 is provided on the inner wall of the valve seat 12, and the lower end surface of the guide section 312 abuts against the limiting protrusion 122, and the limiting protrusion 122 forms a limiting structure.
  • the limiting protrusion 122 includes a limiting step and a limiting boss.
  • the first mounting hole 121 has a first section and a second section that are connected to each other.
  • the first section is located above the second section.
  • the inner diameter of the first section is larger than the inner diameter of the second section.
  • the junction of the two sections forms a limit step.
  • the end surface of the second section facing the first section forms a limiting protrusion 122.
  • a plurality of limit bosses may be provided on the inner wall of the valve seat 12, and the plurality of limit bosses are arranged at intervals along the circumference of the valve seat 12, and the nut seat 31 is lowered by the limit bosses. .
  • an anti-rotation structure 40 is provided between the limiting member 32 and the nut seat 31, and the anti-rotation structure 40 is used to restrict the rotation of the nut seat 31 relative to the valve seat 12.
  • a rotation stop boss and a rotation stop groove can be provided on the limit piece 32 and the nut seat 31, and the rotation stop boss and the rotation stop groove are used to prevent rotation, or the limit piece 32 and the nut seat
  • the cross-sectional shape of 31 is set to a non-circular structure to prevent rotation.
  • the nut base 31 further includes a rotation stop section 313, one end of the rotation stop section 313 is connected with the threaded section 311, and the other end of the rotation stop section 313 is connected with the guide section 312.
  • the outer diameter of the anti-rotation section 313 is larger than the outer diameter of the threaded section 311, and the outer diameter of the anti-rotation section 313 is smaller than the outer diameter of the guide section 312.
  • the limiting member 32 includes a limiting ring, the limiting ring is sleeved on the anti-rotating section 313, and the anti-rotating structure 40 is arranged between the anti-rotating section 313 and the limiting ring.
  • the anti-rotation section 313 can be provided with a anti-rotation boss or anti-rotation groove, or the cross-sectional shape of the anti-rotation section 313 can be set to a non-circular structure, and the structure and shape of the stop ring are the same as those of the anti-rotation section 313. adaptation.
  • One of the anti-rotation section 313 and the limit ring is provided with a anti-rotation convex portion 41, and the other of the anti-rotation section 313 and the limit ring is provided with a anti-rotation groove 42.
  • the anti-rotation convex portion 41 and the anti-rotation The groove 42 cooperates to form a rotation stop structure 40.
  • the rotation stop section 313 is provided with a rotation stop protrusion 41
  • the limit ring is provided with a rotation stop groove 42
  • the rotation stop protrusion 41 extends along the radial direction of the rotation stop section 313.
  • the anti-rotation section 313 may be configured in a rectangular, triangular, or other structure, and the inner hole of the stop ring is adapted to the cross-sectional shape of the anti-rotation section 313.
  • the nut seat 31 is provided with a balance channel 33.
  • the first mounting hole 121 forms a valve cavity.
  • the nut seat 31 has a nut cavity 34.
  • One end of the balance channel 33 communicates with the valve cavity.
  • the other end of 33 communicates with the nut cavity 34. Under the action of the balance channel 33, the nut cavity 34 and the valve cavity can quickly achieve pressure balance, and the fluid in the nut cavity 34 will not hinder the movement of the screw 20.
  • the balance passage 33 includes a first communication section 331 and a second communication section 332 that communicate with each other.
  • One end of the first communication section 331 communicates with the nut cavity 34
  • one end of the second communication section 332 communicates with the valve cavity
  • the first communication section 332 communicates with the valve cavity.
  • 331 is arranged along the radial direction of the nut seat 31
  • the second communication section 332 is arranged along the axial direction of the nut seat 31.
  • the outer wall of the anti-rotation section 313 is provided with a first notch 3311, the first notch 3311 is provided along the radial direction of the nut seat 31, the first notch 3311 is provided with a first communicating hole 3312, the first notch 3311 and the first The communicating holes 3312 cooperate to form a first communicating section 331. Since the limit ring is sleeved on the anti-rotation section 313, the first gap 3311 is provided on the outer wall of the anti-rotation section 313, so that there is a gap between the limit ring and the outer wall of the anti-rotation section 313, so that the first connection can be ensured The section 331 communicates with the second communication section 332.
  • two anti-rotation protrusions 41 are provided on the anti-rotation section 313 at intervals, and the two anti-rotation protrusions 41 are symmetrically arranged on both sides of the anti-rotation section 313, and the opening direction of the first communication hole 3312 is the same as
  • the connecting line of the two anti-rotation protrusions 41 is perpendicular, which facilitates mold opening and processing.
  • the sleeve 11 has a sleeve cavity 111, a second notch 3321 is provided on the outer wall of the guide section 312, and the second notch 3321 forms a second communicating section 332.
  • the second communicating hole 321 is provided on the limiting ring to make The second communication hole 321 communicates with the second gap 3321, so that the sleeve cavity 111 can communicate with the valve cavity, so that the pressure of the sleeve cavity 111 and the valve cavity can be quickly balanced.
  • a communication groove may be provided on the inner wall of the valve seat 12, and the second communication section 332 may be formed by the communication groove.
  • the outer wall of the guide section 312 is provided with a plurality of second notches 3321, the plurality of second notches 3321 are symmetrically arranged along the circumference of the guide section 312, and at least one second notch 3321 is connected to the first communicating section 331 Connected.
  • the multiple second notches 3321 can play a role in assisting deformation, which facilitates press-fitting of the nut holder 31.
  • two second notches 3321 are provided on the outer wall of the guide section 312.
  • the second gap 3321 is used to balance the pressure of the two cavities of the sleeve cavity 111 and the valve cavity on the one hand, and on the other hand to ensure the reliability of the installation of the nut seat 31.
  • the nut seat 31 and the inner wall of the valve seat 12 have an interference fit.
  • the nut seat 31 needs to be pressed into the valve seat 12 during assembly.
  • the second gap 3321 is equivalent to a shrinkage seam, allowing a certain amount of For deformation, in order to ensure the uniformity of deformation, the second notches 3321 should be symmetrically arranged to ensure the verticality and coaxiality of the nut seat 31.
  • the electronic expansion valve further includes a valve seat core 50.
  • the bottom of the valve seat 12 is provided with a second mounting hole 123, and the valve seat core 50 penetrates the second mounting hole 123.
  • the second mounting hole 123 is a stepped hole
  • the outer wall of the valve seat core 50 is provided with a stepped boss.
  • the shape and size of the stepped boss are adapted to the shape and size of the stepped hole, which can ensure the sameness of the valve seat core 50. Axial degree.
  • the valve port is arranged on the valve seat core 50.
  • both the first mounting hole 121 and the second mounting hole 123 are processed by a lathe in a single clamping process, which can ensure the coaxiality of the first mounting hole 121 and the second mounting hole 123, and the nut seat 31 Taking the first mounting hole 121 as a positioning reference, the valve seat core 50 uses the second mounting hole 123 as a positioning reference, so that the coaxiality between the inner hole of the nut seat and the valve port of the valve seat core is ensured.
  • the guide section 312 has a cylindrical structure
  • the top surface of the guide section 312 is provided with a first mounting boss 3114
  • the first mounting boss 314 is coaxially arranged with the nut seat 31
  • the first mounting boss 314 faces the valve seat core 50 extends
  • the top of the valve seat core 50 is provided with a second mounting boss 51
  • the second mounting boss 51 is coaxially arranged with the valve seat core 50.
  • the nut seat 31 is made of plastic material.
  • the nut seat 31 further includes a screw guide section 315, and the screw guide section 315, the threaded section 311, the anti-rotation section 313, and the guide section 312 are sequentially connected from top to bottom.
  • the guide section 312 is provided with a first mounting boss 314 coaxial with the nut base 31, and the nut base 31 has a through hole along the axial direction.
  • the inner diameter of the screw guide section 315, the inner diameter of the threaded section 311, the inner diameter of the anti-rotation section 313, and the inner diameter of the first mounting boss 314 decrease sequentially.
  • the screw guide section 315, the threaded section 311 and the anti-rotation section 313 are all located outside the valve seat 12, and only the guide section 312 is located inside the valve seat 12, which can make full use of the space of the electronic expansion valve and reduce the volume of the electronic expansion valve. Improve integration.
  • the screw 20 is movably inserted in the nut base 31, the screw 20 is threadedly matched with the threaded section 311, and the screw 20 can rotate relative to the nut base 31.
  • the screw guide section 315 is used to guide the screw 20. During the movement of the screw 20, the screw guide section 315 can guide the screw 20, and the upper end of the screw 20 is reduced in diameter to form an inner step 201.
  • the electronic expansion valve further includes a valve needle 70, a positioning member 80 and a spring 90.
  • the valve needle 70 is inserted in the nut seat 31 and the screw 20, the valve needle 70 is arranged corresponding to the valve port, the first mounting boss 314 has an inner hole for guiding the valve needle 70, and the screw 20 passes through the inner step 201 to the valve
  • the needle 70 exerts a downward driving force to drive the valve needle 70 to move close to the valve port, thereby closing the valve port.
  • the valve needle 70 has a third section 71 and a fourth section 72 connected to each other.
  • the diameter of the third section 71 is smaller than the diameter of the fourth section 72.
  • the third section 71 is located above the fourth section 72 and extends out of the screw 20.
  • the positioning member 80 is fixedly arranged at the end of the third section 71 in the upper part. By arranging the positioning member 80 at the end of the third section 71, the positioning member 80 can be used to restrict the position of the valve needle 70 relative to the screw 20 to prevent the valve needle 70 from falling off.
  • the screw 20 applies an upward driving force to the valve needle 70 through the positioning member 80 to drive the valve needle 70 to move away from the valve port, thereby realizing the opening of the valve port.
  • the spring 90 is sleeved on the third section 71 and is arranged between the fourth section 72 and the inner step 201. The spring 90 can provide pre-tensioning force, which can improve the accuracy of the device, and the spring 90 can also serve as a buffer. effect.
  • the spring 90 indirectly abuts the end surface of the fourth section 72 and/or the inner step 201 through a washer.
  • the washer is preferably made of a wear-resistant metal material to prevent the metal spring 90 from contacting the inner wall of the valve needle 70 or the screw 20. Cause wear and tear, which can increase product life.
  • both ends of the spring 90 are provided with washers, and the spring 90 indirectly abuts the end surface of the fourth section 72 and the inner step 201 through the washers.
  • the electronic expansion valve further includes a rotor assembly 100, the rotor assembly 100 is rotatably disposed in the housing 10, and the rotor assembly 100 is drivingly connected with the screw 20.
  • the rotor assembly 100 includes a rotor core 110 and a rotor connecting plate 120.
  • both the sleeve 11 and the valve seat 12 are made using a stretching process. As long as the end face is simply flattened, the amount of metal processing can be reduced and the efficiency can be improved.
  • the electronic expansion valve further includes a fixing frame 130, which is arranged on the outer wall of the valve seat 12.
  • the fixing frame 130 uses a fan-shaped structure, which can minimize the use of materials and reduce the cost.
  • the second embodiment of the present application provides an electronic expansion valve.
  • the electronic expansion valve further includes a guide sleeve 60 that guides One end of the sleeve 60 is sleeved on the first installation boss 314 by interference fit or transition fit, and the other end of the guide sleeve 60 is sleeved on the second installation boss 51 by interference fit, so that it can be used
  • the guide sleeve 60 guides the nut seat 31 and the valve seat core 50 again, which can further improve the coaxiality of the device.
  • the assembly steps of the electronic expansion valve are:
  • valve seat 12 and the valve seat core 50 are fixed by brazing in the furnace;
  • the nut seat 31 as a guide section 312 with a skirt structure, and pressing the guide section 312 into the valve seat 12, the coaxiality of the nut seat 31 and the valve seat 12 can be ensured.
  • the upper end surface and the lower end surface of the guide section 312 are respectively restricted by the restricting member 32 and the restricting structure, so as to complete the assembling and fixing of the nut seat 31.

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Abstract

一种电子膨胀阀，包括：壳体（10），包括相互连接的套管（11）和阀座（12），阀座（12）具有第一安装孔（121）；螺杆（20），可移动地设置在壳体（10）内；螺母组件（30），包括螺母座（31）和限位件（32），螺杆（20）穿设在螺母座（31）内，螺母座（31）包括阶梯设置的螺纹段（311）和导向段（312），螺纹段（311）的直径小于导向段（312）的直径，导向段（312）插设在第一安装孔（121）内，限位件（32）与导向段（312）的上端面相贴合并与阀座（12）固定连接，限位件（32）用于对螺母座（31）进行上限位，导向段（312）的下端面与阀座（12）的内壁之间设置有限位结构，限位结构用于对螺母座（31）进行下限位，该电子膨胀阀保证了螺母座装配时的同轴度。

Description

电子膨胀阀
本申请要求于2019年11月27日提交至中国国家知识产权局、申请号为201911185382.9、发明名称为“电子膨胀阀”的专利申请的优先权。
技术领域
本申请涉及电子膨胀阀技术领域，具体而言，涉及一种电子膨胀阀。
背景技术
目前，电子膨胀阀包括壳体、螺母座、螺杆以及阀针，螺母座、螺杆以及阀针均设置在壳体内。其中，壳体包括阀座和套管，阀座上设置有阀口。具体的，螺母座通过连接片与阀座的上端面焊接固定，螺杆可移动地穿设在螺母座内，阀针设置在螺杆的靠近阀口的一端，螺杆带动阀针移动以实现阀口的开闭。
但是，在相关技术中，螺母座位于阀座上方，利用连接片将螺母座焊接到阀座上，在焊接产生的应力作用下，螺母座会发生移动，无法保证螺母座与阀座的同轴度。因此，相关技术中存在螺母座同轴度差的问题。
发明内容
本申请提供一种电子膨胀阀，以解决相关技术中的螺母座同轴度差的问题。
本申请提供了一种电子膨胀阀，电子膨胀阀包括：壳体，包括相互连接的套管和阀座，阀座具有第一安装孔；螺杆，可移动地设置在壳体内；螺母组件，包括螺母座和限位件，螺杆穿设在螺母座内，螺母座包括阶梯设置的螺纹段和导向段，螺纹段的直径小于导向段的直径，导向段插设在第一安装孔内，限位件与导向段的上端面相贴合并与阀座固定连接，限位件用于对螺母座进行上限位，导向段的下端面与阀座的内壁之间设置有限位结构，限位结构用于对螺母座进行下限位。
进一步地，阀座的内壁上设置有限位凸部，导向段的下端面与限位凸部相抵接，限位凸部形成限位结构。
进一步地，第一安装孔具有相互连接的第一段和第二段，第一段位于第二段的上方，第一段的内径大于第二段的内径，导向段插设在第一段内，第二段朝向第一段的端面形成限位凸部。
进一步地，限位件与螺母座之间设置有止转结构，止转结构用于限制螺母座相对阀座转动。
进一步地，限位件包括限位环，螺母座还包括止转段，止转段的一端与螺纹段连接，止转段的另一端与导向段连接，限位环套设在止转段上，止转结构设置在止转段和限位环之间。
进一步地，止转段和限位环的其中一个上设置有止转凸部，止转段和限位环的另一个上设置有止转凹槽，止转凸部与止转凹槽相配合形成止转结构。
进一步地，螺母座上设置有平衡通道，第一安装孔形成阀腔，螺母座具有螺母腔，平衡通道的一端与阀腔连通，平衡通道的另一端与螺母腔连通。
进一步地，平衡通道包括相互连通的第一连通段和第二连通段，第一连通段的一端与螺母腔连通，第二连通段的一端与阀腔连通，第一连通段沿螺母座的径向设置，第二连通段沿螺母座的轴向设置。
进一步地，止转段的外壁上设置有第一缺口，第一缺口内设置有第一连通孔，第一缺口和第一连通孔相配合形成第一连通段。
进一步地，止转段上间隔设置有两个止转凸部，两个止转凸部对称设置在止转段的两侧，第一连通孔的开口方向与两个止转凸部的连线相垂直。
进一步地，套管具有套管腔，导向段的外壁上设置有第二缺口，第二缺口形成第二连通段，限位环上设置有第二连通孔，第二连通孔与第二缺口连通，以使套管腔与阀腔连通。
进一步地，导向段的外壁上设置有多个第二缺口，多个第二缺口沿导向段的周向对称设置，至少一个第二缺口与第一连通段相连通。
进一步地，电子膨胀阀还包括阀座芯，阀座上设置有第二安装孔，阀座芯穿设在第二安装孔内，第二安装孔为阶梯孔，阀座芯的外壁上设置有阶梯凸台，阶梯凸台的形状尺寸与阶梯孔的形状尺寸相适配。
进一步地，导向段为筒形结构，导向段内设置有第一安装凸台，第一安装凸台与螺母座同轴设置，阀座芯的顶部设置有第二安装凸台，第二安装凸台与阀座芯同轴设置，电子膨胀阀还包括导向套，导向套的一端套设在第一安装凸台上，导向套的另一端套设在第二安装凸台上。
进一步地，螺母座还包括螺杆导向段，螺杆导向段、螺纹段、止转段以及导向段由上至下顺次连接，导向段内设置有与螺母座同轴的第一安装凸台，螺母座具有沿轴线方向的通孔，螺杆导向段的内径、螺纹段的内径、止转段的内径以及第一安装凸台的内径依次减小。
进一步地，螺杆可移动地穿设在螺母座内，螺杆与螺纹段螺纹配合，螺杆导向段用于对螺杆进行导向，螺杆的上端内部缩径形成有内台阶，电子膨胀阀还包括：阀针，阀针穿设在螺母座和螺杆内，第一安装凸台具有对阀针进行导向的内孔，螺杆通过内台阶向阀针施加向下的驱动力；定位件，阀针具有相互连接的第三段和第四段，第三段的直径小于第四段的直径，第三段位于第四段的上方并延伸出螺杆的上部，定位件固定设置在第三段的端部，螺杆通过定位件向阀针施加向上的驱动力；弹簧，套设在第三段上并设置在第四段与内台阶之间。
进一步地，弹簧通过垫圈与第四段的端面和/或内台阶间接相抵。
应用本申请的技术方案，该电子膨胀阀包括壳体、螺杆以及螺母组件，螺杆可移动地设置在壳体内。其中，壳体包括相互连接的套管和阀座，阀座具有第一安装孔，螺母组件包括螺母座和限位件，螺杆穿设在螺母座内。具体的，螺母座包括阶梯设置的螺纹段和导向段，且螺纹段的直径小于导向段的直径。通过将导向段插设在第一安装孔内，使限位件与导向段的上端面相贴合并与阀座固定连接，可以利用限位件对螺母座进行上限位，避免螺母座从阀座内脱出。并且，在导向段的下端面与阀座的内壁之间设置有限位结构，利用限位结构可以对螺母座进行下限位，以将螺母座固定在阀座内。采用上述结构，通过将导向段插设在第一安装孔内，可以利用导向段对螺母座进行导向，以保证螺母座的同轴度，然后利用限位件和限位结构对螺母座进行固定，能够完成螺母座的装配。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了根据本申请实施例一提供的电子膨胀阀的剖视图；
图2示出了图1中A处的局部放大图；
图3示出了图1中B处的局部放大图；
图4示出了图1中螺母座的结构示意图；
图5示出了图1中螺母座的又一结构示意图；
图6示出了图1中螺母组件与阀座的装配图；
图7示出了图1中螺母座的剖视图；
图8示出了根据本申请实施例二提供的电子膨胀阀的剖视图。
其中，上述附图包括以下附图标记：
10、壳体；11、套管；111、套管腔；12、阀座；121、第一安装孔；122、限位凸部；123、第二安装孔；
20、螺杆；201、内台阶；
30、螺母组件；31、螺母座；311、螺纹段；312、导向段；313、止转段；314、第一安装凸台；315、螺杆导向段；32、限位件；321、第二连通孔；33、平衡通道；331、第一连通段；3311、第一缺口；3312、第一连通孔；332、第二连通段；3321、第二缺口；34、螺母腔；
40、止转结构；41、止转凸部；42、止转凹槽；
50、阀座芯；51、第二安装凸台；
60、导向套；
70、阀针；71、第三段；72、第四段；
80、定位件；90、弹簧；
100、转子组件；110、转子芯；120、转子连接板；130、固定架。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1至图7所示，本申请实施例一提供一种电子膨胀阀，该电子膨胀阀包括壳体10、螺杆20以及螺母组件30，螺杆20和螺母组件30均设置在壳体10内，且螺杆20可在壳体10内移动。其中，壳体10包括相互连接的套管11和阀座12，阀座12具有第一安装孔121，螺母组件30包括螺母座31和限位件32，螺杆20穿设在螺母座31内，螺母座31的一端穿设在第一安装孔121内。具体的，螺母座31包括阶梯设置的螺纹段311和导向段312，螺纹段311的直径小于导向段312的直径，且螺纹段311位于导向段312的上方。通过将导向段312插设在第一安装孔121内，可以利用导向段312对螺母座31进行导向，以保证螺母座31的同轴度。在本实施例中，导向段312与第一安装孔121过盈配合。在将导向段312压装至第一安装孔121内之后，将限位件32与导向段312的上端面相贴合并与阀座12固定连接，可以利用限位件32对螺母座31进行上限位，以避免螺母座31从第一安装孔121内脱出。并且，导向段312的下端面与阀座12的内壁之间设置有限位结构，可以利用限位结构对螺母座31进行下限位，以实现螺母座31的固定，避免螺母座31过度压装至第一安装孔121内。
应用本实施例提供的电子膨胀阀，通过导向段312与第一安装孔121相配合，可以利用导向段312对螺母座31进行导向，能够保证螺母座31的同轴度。在装配中，限位结构可以对螺母座31进行下限位，避免螺母座31过度插入第一安装孔121内，当螺母座31装配到位时，使限位件32与导向段312的上端面相贴合并将限位件32与阀座12固定连接即可，如此便于进行装配，能够提升装配精度，如此能够进一步提升螺母座31的同轴度。
在本实施例中，限位件32通过焊接的方式与阀座12固定连接，由于螺母座31的导向段312压装在第一安装孔121内，在对限位件32进行焊接时，螺母座31不会发生移动，从而能够保证螺母座31的同轴度。在本实施例中，导向段312的上端面与阀座12的上端面相平齐。
其中，阀座12的内壁上设置有限位凸部122，导向段312的下端面与限位凸部122相抵接，限位凸部122形成限位结构。具体的，限位凸部122包括限位台阶和限位凸台。
在本实施例中，第一安装孔121具有相互连接的第一段和第二段，第一段位于第二段的上方，第一段的内径大于第二段的内径，第一段和第二段的连接处形成限位台阶。具体的，第二段朝向第一段的端面形成限位凸部122。将导向段312插设在第一段内之后，导向段312的端面与第二段的朝向第一段的端面相抵接，以对螺母座31进行下限位。在其它实施例中，可以在阀座12的内壁上设置多个限位凸台，多个限位凸台沿阀座12的周向间隔设置，利用限位凸台对螺母座31进行下限位。
在本实施例中，限位件32与螺母座31之间设置有止转结构40，止转结构40用于限制螺母座31相对阀座12转动。其中，可以在限位件32和螺母座31上设置止转凸台和止转凹槽，利用止转凸台和止转凹槽相配合进行止转，也可以将限位件32和螺母座31的横截面形状设置为非圆结构进行止转。
具体的，螺母座31还包括止转段313，止转段313的一端与螺纹段311连接，止转段313的另一端与导向段312连接。在本实施例中，止转段313的外径大于螺纹段311的外径，止转段313的外径小于导向段312的外径。其中，限位件32包括限位环，限位环套设在止转段313上，止转结构40设置在止转段313和限位环之间。具体的，可以在止转段313上设置止转凸台或止转凹槽，或者将止转段313的横截面形状设置为非圆结构，限位环的结构和形状与止转段313相适配。
其中，止转段313和限位环的其中一个上设置有止转凸部41，止转段313和限位环的另一个上设置有止转凹槽42，止转凸部41与止转凹槽42相配合形成止转结构40。在本实施例中，止转段313上设置有止转凸部41，限位环上设置有止转凹槽42，止转凸部41沿止转段313的径向延伸。在其它实施例中，可以将止转段313设置为矩形、三角形等结构，限位环的内孔与止转段313的横截面形状相适配。
为了便于螺杆20在螺母座31内移动，螺母座31上设置有平衡通道33，第一安装孔121形成阀腔，螺母座31具有螺母腔34，平衡通道33的一端与阀腔连通，平衡通道33的另一端与螺母腔34连通。在平衡通道33的作用下，螺母腔34和阀腔能够快速实现压力平衡，螺母腔34内的流体不会对螺杆20的移动造成阻碍。
其中，平衡通道33包括相互连通的第一连通段331和第二连通段332，第一连通段331的一端与螺母腔34连通，第二连通段332的一端与阀腔连通，第一连通段331沿螺母座31的径向设置，第二连通段332沿螺母座31的轴向设置。采用上述结构，螺母腔34可依次通过第一连通段331和第二连通段332与阀腔连通。
具体的，止转段313的外壁上设置有第一缺口3311，第一缺口3311沿螺母座31的径向设置，第一缺口3311内设置有第一连通孔3312，第一缺口3311和第一连通孔3312相配合形成第一连通段331。由于限位环套设在止转段313上，通过在止转段313的外壁上设置第一缺口3311，使得限位环与止转段313的外壁之间具有间隔，如此能够保证第一连通段331与第二连通段332相连通。
在本实施例中，止转段313上间隔设置有两个止转凸部41，两个止转凸部41对称设置在止转段313的两侧，且第一连通孔3312的开口方向与两个止转凸部41的连线相垂直，如此便于进行开模，便于进行加工。
具体的，套管11具有套管腔111，导向段312的外壁上设置有第二缺口3321，第二缺口3321形成第二连通段332，通过在限位环上设置第二连通孔321，使第二连通孔321与第二缺口3321连通，可以使得套管腔111与阀腔连通，从而实现套管腔111与阀腔的压力快速平衡。在其它实施例中，可以在阀座12的内壁上设置连通槽，利用连通槽形成第二连通段332。
在本实施例中，导向段312的外壁上设置有多个第二缺口3321，多个第二缺口3321沿导向段312的周向对称设置，且至少一个第二缺口3321与第一连通段331相连通。采用上述结构，在将螺母座31压装到第一安装孔121内时，多个第二缺口3321可起到辅助变形的作用，便于对螺母座31进行压装。具体的，导向段312的外壁上设置有两个第二缺口3321。
具体的，第二缺口3321一方面用来平衡套管腔111与阀腔两个腔体的压力，另一方面是用来保证螺母座31安装的可靠性。其中，螺母座31与阀座12内壁过盈配合，组装时需要把螺母座31压入阀座12内，为了防止对螺母座31造成损坏，第二缺口3321相当于收缩缝，允许有一定的变形，为了保证变形均匀性，所以第二缺口3321要对称设置，保证螺母座31的垂直度和同轴度。
其中，电子膨胀阀还包括阀座芯50，阀座12的底部设置有第二安装孔123，阀座芯50穿设在第二安装孔123内。具体的，第二安装孔123为阶梯孔，阀座芯50的外壁上设置有阶梯凸台，阶梯凸台的形状尺寸与阶梯孔的形状尺寸相适配，如此能够保证阀座芯50的同轴度。其中，阀口设置在阀座芯50上。在本实施例中，第一安装孔121和第二安装孔123均通过车床一次装夹加工的方式进行加工，能够保证第一安装孔121和第二安装孔123的同轴度，螺母座31以第一安装孔121为定位基准，阀座芯50以第二安装孔123为定位基准，这样就保证了螺母座内孔与阀座芯阀口的同轴度。
具体的，导向段312为筒形结构，导向段312的顶面设置有第一安装凸台314，第一安装凸台314与螺母座31同轴设置，第一安装凸台314朝向阀座芯50延伸，阀座芯50的顶部设置有第二安装凸台51，第二安装凸台51与阀座芯50同轴设置。在本实施例中，螺母座31采用塑料材质制作而成。
在本实施例中，螺母座31还包括螺杆导向段315，螺杆导向段315、螺纹段311、止转段313以及导向段312由上至下顺次连接。其中，导向段312内设置有与螺母座31同轴的第一安装凸台314，螺母座31具有沿轴线方向的通孔。具体的，螺杆导向段315的内径、螺纹段311的内径、止转段313的内径以及第一安装凸台314的内径依次减小。其中，螺杆导向段315、螺纹段311以及止转段313均位于阀座12的外侧，只有导向段312位于阀座12内部，能够充分利用电子膨胀阀的空间，可以缩小电子膨胀阀的体积，提升集成度。
在本实施例中，螺杆20可移动地穿设在螺母座31内，螺杆20与螺纹段311螺纹配合，螺杆20可相对螺母座31转动。其中，螺杆导向段315用于对螺杆20进行导向，在螺杆20 移动的过程中，螺杆导向段315可以对螺杆20进行导向，且螺杆20的上端内部缩径形成有内台阶201。
在本实施例中，电子膨胀阀还包括阀针70、定位件80以及弹簧90。具体的，阀针70穿设在螺母座31和螺杆20内，阀针70对应阀口设置，第一安装凸台314具有对阀针70进行导向的内孔，螺杆20通过内台阶201向阀针70施加向下的驱动力，以驱动阀针70靠近阀口移动，从而实现阀口的闭合。具体的，阀针70具有相互连接的第三段71和第四段72，第三段71的直径小于第四段72的直径，第三段71位于第四段72的上方并延伸出螺杆20的上部，定位件80固定设置在第三段71的端部。通过将定位件80设置在第三段71的端部，可以利用定位件80限制阀针70相对螺杆20的位置，避免阀针70脱落。在本实施例中，螺杆20通过定位件80向阀针70施加向上的驱动力，以驱动阀针70远离阀口移动，从而实现阀口的开启。具体的，弹簧90套设在第三段71上并设置在第四段72与内台阶201之间，弹簧90可以提供预紧力，能够提升装置的精度，且弹簧90还可以起到缓冲的作用。
其中，弹簧90通过垫圈与第四段72的端面和/或内台阶201间接相抵，垫圈优选由耐磨的金属材料制成，以避免金属制弹簧90与阀针70或螺杆20的内壁接触后造成磨损，如此可增加产品寿命。在本实施例中，弹簧90的两端均加设垫圈，弹簧90通过垫圈与第四段72的端面和内台阶201间接相抵。
在本实施例中，电子膨胀阀还包括转子组件100，转子组件100可转动地设置在壳体10内，转子组件100与螺杆20驱动连接。其中，转子组件100包括转子芯110和转子连接板120。
在本实施例中，套管11和阀座12都是使用拉伸工艺制作，只要简单的进行平端面，可以减少金加工切削量，能够提高效率。
并且，电子膨胀阀还包括固定架130，固定架130设置在阀座12的外壁上，固定架130使用扇形结构，能最大程度减少材料使用，可以降低成本。
如图8所示，本申请实施例二提供一种电子膨胀阀，实施例二提供的电子膨胀阀与实施例一的区别在于，在实施例二中，电子膨胀阀还包括导向套60，导向套60的一端通过过盈配合或过渡配合的方式套设在第一安装凸台314上，导向套60的另一端通过过盈配合的方式套设在第二安装凸台51上，如此可利用导向套60再次对螺母座31和阀座芯50进行导向，能够进一步提升装置的同轴度。
在本实施例中，电子膨胀阀的装配步骤为：
(1)阀座12与阀座芯50使用炉中钎焊进行固定；
(2)导向套60与螺母座31先组装在一起然后过盈压入阀座12的第一安装孔121内，使螺母座31的下端面与限位凸部122相抵接；
(3)装入限位件32进行激光焊固定；
(4)依次放入阀针70、弹簧90，然后拧入螺杆20到初始位置；
(5)放入转子组件100并顺时针拧到下止挡位置保持不动，转子连接板120与螺杆20进行激光焊固定；
(6)装入定位件80，然后逆时针方向转动转子组件100θ角(角度大小根据调节特性可定制，一般90-235度角之间)保持不动，对定位件80与阀针70进行激光焊固定；
(7)最后压入套管11并焊接，再放入固定架130再焊接，组装完成。
通过本实施例提供的装置，通过将螺母座31设置为具有裙边结构的导向段312，将导向段312压装到阀座12内，能够保证螺母座31与阀座12的同轴度，利用限位件32和限位结构对导向段312的上端面和下端面分别进行限位，能够完成螺母座31的装配固定。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (17)

  1. 一种电子膨胀阀，所述电子膨胀阀包括：
    壳体(10)，包括相互连接的套管(11)和阀座(12)，所述阀座(12)具有第一安装孔(121)；
    螺杆(20)，可移动地设置在所述壳体(10)内；
    螺母组件(30)，包括螺母座(31)和限位件(32)，所述螺杆(20)穿设在所述螺母座(31)内，所述螺母座(31)包括阶梯设置的螺纹段(311)和导向段(312)，螺纹段(311)的直径小于导向段(312)的直径，所述导向段(312)插设在所述第一安装孔(121)内，所述限位件(32)与所述导向段(312)的上端面相贴合并与所述阀座(12)固定连接，所述限位件(32)用于对所述螺母座(31)进行上限位，所述导向段(312)的下端面与所述阀座(12)的内壁之间设置有限位结构，所述限位结构用于对所述螺母座(31)进行下限位。
  2. 根据权利要求1所述的电子膨胀阀，所述阀座(12)的内壁上设置有限位凸部(122)，所述导向段(312)的下端面与所述限位凸部(122)相抵接，所述限位凸部(122)形成所述限位结构。
  3. 根据权利要求2所述的电子膨胀阀，所述第一安装孔(121)具有相互连接的第一段和第二段，所述第一段位于所述第二段的上方，所述第一段的内径大于所述第二段的内径，所述导向段(312)插设在所述第一段内，所述第二段朝向所述第一段的端面形成所述限位凸部(122)。
  4. 根据权利要求1所述的电子膨胀阀，所述限位件(32)与所述螺母座(31)之间设置有止转结构(40)，所述止转结构(40)用于限制所述螺母座(31)相对所述阀座(12)转动。
  5. 根据权利要求4所述的电子膨胀阀，所述限位件(32)包括限位环，所述螺母座(31)还包括止转段(313)，所述止转段(313)的一端与所述螺纹段(311)连接，所述止转段(313)的另一端与所述导向段(312)连接，所述限位环套设在所述止转段(313)上，所述止转结构(40)设置在所述止转段(313)和所述限位环之间。
  6. 根据权利要求5所述的电子膨胀阀，所述止转段(313)和所述限位环的其中一个上设置有止转凸部(41)，所述止转段(313)和所述限位环的另一个上设置有止转凹槽(42)，所述止转凸部(41)与所述止转凹槽(42)相配合形成所述止转结构(40)。
  7. 根据权利要求5所述的电子膨胀阀，所述螺母座(31)上设置有平衡通道(33)，所述第一安装孔(121)形成阀腔，所述螺母座(31)具有螺母腔(34)，所述平衡通道(33)的一端与所述阀腔连通，所述平衡通道(33)的另一端与所述螺母腔(34)连通。
  8. 根据权利要求7所述的电子膨胀阀，平衡通道(33)包括相互连通的第一连通段(331)和第二连通段(332)，所述第一连通段(331)的一端与所述螺母腔(34)连通，所述第 二连通段(332)的一端与所述阀腔连通，所述第一连通段(331)沿所述螺母座(31)的径向设置，所述第二连通段(332)沿所述螺母座(31)的轴向设置。
  9. 根据权利要求8所述的电子膨胀阀，所述止转段(313)的外壁上设置有第一缺口(3311)，所述第一缺口(3311)内设置有第一连通孔(3312)，所述第一缺口(3311)和所述第一连通孔(3312)相配合形成所述第一连通段(331)。
  10. 根据权利要求9所述的电子膨胀阀，所述止转段(313)上间隔设置有两个止转凸部(41)，两个所述止转凸部(41)对称设置在所述止转段(313)的两侧，所述第一连通孔(3312)的开口方向与两个所述止转凸部(41)的连线相垂直。
  11. 根据权利要求8所述的电子膨胀阀，所述套管(11)具有套管腔(111)，所述导向段(312)的外壁上设置有第二缺口(3321)，所述第二缺口(3321)形成所述第二连通段(332)，所述限位环上设置有第二连通孔(321)，所述第二连通孔(321)与所述第二缺口(3321)连通，以使所述套管腔(111)与所述阀腔连通。
  12. 根据权利要求11所述的电子膨胀阀，所述导向段(312)的外壁上设置有多个所述第二缺口(3321)，多个所述第二缺口(3321)沿所述导向段(312)的周向对称设置，至少一个所述第二缺口(3321)与所述第一连通段(331)相连通。
  13. 根据权利要求1所述的电子膨胀阀，所述电子膨胀阀还包括阀座芯(50)，所述阀座(12)上设置有第二安装孔(123)，所述阀座芯(50)穿设在所述第二安装孔(123)内，所述第二安装孔(123)为阶梯孔，所述阀座芯(50)的外壁上设置有阶梯凸台，所述阶梯凸台的形状尺寸与所述阶梯孔的形状尺寸相适配。
  14. 根据权利要求13所述的电子膨胀阀，所述导向段(312)为筒形结构，所述导向段(312)内设置有第一安装凸台(314)，所述第一安装凸台(314)与所述螺母座(31)同轴设置，所述阀座芯(50)的顶部设置有第二安装凸台(51)，所述第二安装凸台(51)与所述阀座芯(50)同轴设置，所述电子膨胀阀还包括导向套(60)，所述导向套(60)的一端套设在所述第一安装凸台(314)上，所述导向套(60)的另一端套设在所述第二安装凸台(51)上。
  15. 根据权利要求5所述的电子膨胀阀，所述螺母座(31)还包括螺杆导向段(315)，所述螺杆导向段(315)、所述螺纹段(311)、所述止转段(313)以及所述导向段(312)由上至下顺次连接，所述导向段(312)内设置有与所述螺母座(31)同轴的第一安装凸台(314)，所述螺母座(31)具有沿轴线方向的通孔，所述螺杆导向段(315)的内径、所述螺纹段(311)的内径、所述止转段(313)的内径以及所述第一安装凸台(314)的内径依次减小。
  16. 根据权利要求15所述的电子膨胀阀，所述螺杆(20)可移动地穿设在所述螺母座(31)内，所述螺杆(20)与所述螺纹段(311)螺纹配合，所述螺杆导向段(315)用于对所述 螺杆(20)进行导向，所述螺杆(20)的上端内部缩径形成有内台阶(201)，所述电子膨胀阀还包括：
    阀针(70)，所述阀针(70)穿设在所述螺母座(31)和所述螺杆(20)内，所述第一安装凸台(314)具有对所述阀针(70)进行导向的内孔，所述螺杆(20)通过所述内台阶(201)向所述阀针(70)施加向下的驱动力；
    定位件(80)，所述阀针(70)具有相互连接的第三段(71)和第四段(72)，所述第三段(71)的直径小于所述第四段(72)的直径，所述第三段(71)位于所述第四段(72)的上方并延伸出所述螺杆(20)的上部，所述定位件(80)固定设置在所述第三段(71)的端部，所述螺杆(20)通过所述定位件(80)向所述阀针(70)施加向上的驱动力；
    弹簧(90)，套设在所述第三段(71)上并设置在所述第四段(72)与所述内台阶(201)之间。
  17. 根据权利要求16所述的电子膨胀阀，所述弹簧(90)通过垫圈与所述第四段(72)的端面和/或所述内台阶(201)间接相抵。
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CN113685558A (zh) * 2021-09-29 2021-11-23 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
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CN113819249A (zh) * 2021-09-29 2021-12-21 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN116733924A (zh) * 2022-03-04 2023-09-12 浙江盾安人工环境股份有限公司 螺母组件及电子膨胀阀
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116733922A (zh) * 2022-03-04 2023-09-12 浙江盾安禾田金属有限公司 电子膨胀阀

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003329158A (ja) * 2002-05-15 2003-11-19 Saginomiya Seisakusho Inc 電動弁
WO2014023014A1 (zh) * 2012-08-10 2014-02-13 浙江三花股份有限公司 一种电子膨胀阀
CN107461498A (zh) * 2016-06-03 2017-12-12 浙江盾安禾田金属有限公司 一种电子膨胀阀
CN207880164U (zh) * 2017-10-29 2018-09-18 浙江三花智能控制股份有限公司 电子膨胀阀
CN209012452U (zh) * 2018-08-17 2019-06-21 浙江盾安禾田金属有限公司 电子膨胀阀
CN209012453U (zh) * 2018-08-17 2019-06-21 浙江盾安禾田金属有限公司 电子膨胀阀
CN109958775A (zh) * 2017-12-25 2019-07-02 浙江盾安机械有限公司 一种电子膨胀阀
CN211145371U (zh) * 2019-11-27 2020-07-31 浙江盾安禾田金属有限公司 电子膨胀阀

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4805617B2 (ja) * 2005-07-01 2011-11-02 株式会社鷺宮製作所 電動式コントロールバルブ
JP2007032675A (ja) * 2005-07-26 2007-02-08 Fuji Koki Corp 電動弁
CN101173714B (zh) * 2006-11-03 2010-09-01 浙江三花制冷集团有限公司 电子膨胀阀
JP3145048U (ja) * 2008-07-11 2008-09-25 株式会社鷺宮製作所 電動膨張弁及び冷凍サイクル
JP5189933B2 (ja) 2008-08-29 2013-04-24 株式会社日本触媒 調節弁
CN101956830B (zh) 2009-07-17 2013-06-12 浙江三花股份有限公司 电子膨胀阀
CN202914758U (zh) * 2012-10-09 2013-05-01 浙江盾安禾田金属有限公司 一种电子膨胀阀
JP6214488B2 (ja) * 2014-07-18 2017-10-18 株式会社鷺宮製作所 電動弁
CN205504133U (zh) * 2016-01-15 2016-08-24 浙江盾安禾田金属有限公司 二段式电子膨胀阀
JP6209231B2 (ja) * 2016-02-18 2017-10-04 株式会社鷺宮製作所 電動弁
JP2017156964A (ja) * 2016-03-01 2017-09-07 株式会社鷺宮製作所 容量調整弁
CN108343749B (zh) * 2017-01-24 2021-12-21 浙江盾安机械有限公司 一种电子膨胀阀
CN110345291A (zh) * 2018-04-02 2019-10-18 浙江盾安禾田金属有限公司 电子膨胀阀

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003329158A (ja) * 2002-05-15 2003-11-19 Saginomiya Seisakusho Inc 電動弁
WO2014023014A1 (zh) * 2012-08-10 2014-02-13 浙江三花股份有限公司 一种电子膨胀阀
CN107461498A (zh) * 2016-06-03 2017-12-12 浙江盾安禾田金属有限公司 一种电子膨胀阀
CN207880164U (zh) * 2017-10-29 2018-09-18 浙江三花智能控制股份有限公司 电子膨胀阀
CN109958775A (zh) * 2017-12-25 2019-07-02 浙江盾安机械有限公司 一种电子膨胀阀
CN209012452U (zh) * 2018-08-17 2019-06-21 浙江盾安禾田金属有限公司 电子膨胀阀
CN209012453U (zh) * 2018-08-17 2019-06-21 浙江盾安禾田金属有限公司 电子膨胀阀
CN211145371U (zh) * 2019-11-27 2020-07-31 浙江盾安禾田金属有限公司 电子膨胀阀

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113685558A (zh) * 2021-09-29 2021-11-23 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113685555A (zh) * 2021-09-29 2021-11-23 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113685556A (zh) * 2021-09-29 2021-11-23 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113685557A (zh) * 2021-09-29 2021-11-23 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113700873A (zh) * 2021-09-29 2021-11-26 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113790275A (zh) * 2021-09-29 2021-12-14 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113819249A (zh) * 2021-09-29 2021-12-21 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN113790275B (zh) * 2021-09-29 2023-12-22 广东威灵电机制造有限公司 电子膨胀阀及制冷设备
CN116733924A (zh) * 2022-03-04 2023-09-12 浙江盾安人工环境股份有限公司 螺母组件及电子膨胀阀
CN116922011A (zh) * 2023-07-31 2023-10-24 好特斯(南通)精密科技有限公司 阀针的制备方法及阀针
CN118775550A (zh) * 2024-09-11 2024-10-15 四川中油乐仪能源装备制造股份有限公司 一种截止阀

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