WO2022078233A1 - 阀芯组件以及电子膨胀阀 - Google Patents

阀芯组件以及电子膨胀阀 Download PDF

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Publication number
WO2022078233A1
WO2022078233A1 PCT/CN2021/122305 CN2021122305W WO2022078233A1 WO 2022078233 A1 WO2022078233 A1 WO 2022078233A1 CN 2021122305 W CN2021122305 W CN 2021122305W WO 2022078233 A1 WO2022078233 A1 WO 2022078233A1
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WO
WIPO (PCT)
Prior art keywords
gasket
core assembly
valve core
segment
bushing
Prior art date
Application number
PCT/CN2021/122305
Other languages
English (en)
French (fr)
Inventor
贺宇辰
徐冠军
江超
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
Priority claimed from CN202011111737.2A external-priority patent/CN112178223A/zh
Priority claimed from CN202022319470.8U external-priority patent/CN213419940U/zh
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 JP2023515338A priority Critical patent/JP2023545237A/ja
Priority to KR1020237012676A priority patent/KR20230063366A/ko
Publication of WO2022078233A1 publication Critical patent/WO2022078233A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the technical field of electronic expansion valves, and in particular, to a valve core assembly and an electronic expansion valve.
  • the electronic expansion valve includes a casing and a valve core assembly, the valve core assembly is arranged in the casing, and the valve core assembly can be used to perform an on-off valve operation.
  • the valve core assembly includes a spring sleeve, a spring, a sleeve, a pressure sleeve and a screw rod.
  • the spring, the sleeve and the pressure sleeve are all arranged in the spring sleeve, the pressure sleeve and the spring sleeve are fixedly connected, and one end of the screw rod passes through the spring sleeve.
  • the bushing is welded on the end of the screw rod, and the spring abuts on the bushing, so that the upper surface of the bushing is in contact with the lower surface of the pressing sleeve.
  • the present application provides a valve core assembly and an electronic expansion valve, so as to solve the problem that the friction force of the valve core assembly in the related art is too large, which affects the valve opening performance and service life.
  • a valve core assembly includes: a spring sleeve having a first end and a second end disposed opposite to each other, the first end of the spring sleeve is provided with an annular flange; a screw, the screw One end of the ring passes through the annular flange and extends into the spring sleeve; the limit component is located in the spring sleeve, the limit component includes a gasket and a bushing, the gasket is rotatably sleeved on the screw, and the first end of the gasket Abutting with the annular flange, the bushing is arranged on the screw and is located at the second end of the gasket to limit the axial position of the gasket relative to the screw; the valve needle, one end of the valve needle extends into the second end of the spring sleeve;
  • the spring is located in the spring sleeve, one end of the spring is in contact with the gasket, and the other end
  • the valve core assembly includes a spring sleeve, a screw rod, a limit assembly, a valve needle and a spring
  • the limit assembly and the spring are both located in the spring sleeve
  • the limit assembly includes a gasket and a bushing.
  • the first end of the spring sleeve is provided with an annular flange, one end of the screw rod passes through the annular flange and extends into the spring sleeve, and one end of the valve needle extends into the second end of the spring sleeve.
  • the bushing By rotatably sheathing a washer on the screw rod, the bushing is arranged on the screw rod and is located at the second end of the washer, and the axial position of the washer relative to the screw rod can be restricted by the bushing, because one end of the spring is in contact with the washer The other end of the spring is in contact with the valve needle, and under the action of the elastic force of the spring, the first end of the gasket is in contact with the annular flange.
  • the screw includes a first stage and a second stage, the gasket is arranged on the first stage, and the bushing is arranged on the second stage.
  • the axial position of the gasket can be defined by using the first stage to cooperate with the bushing, and the axial position of the bushing can be defined by using the second stage to cooperate with the gasket.
  • the screw comprises a first section, a second section and a third section which are connected in sequence and their diameters decrease in turn, the second section forms the first stage, the third section forms the second stage, and the gasket is sleeved on the first stage.
  • the bushing is sleeved on the third section and connected with the third section. Since the screw is provided with two stepped structures, by arranging the bushing on the third section of the end and connecting the bushing with the third section, the position of the gasket on the screw can be restricted by the bushing.
  • the first end of the gasket is in contact with the end wall of the first segment
  • the bushing is in contact with the second end of the gasket
  • the length dimension of the second segment is smaller than the thickness dimension of the gasket.
  • the end wall of the first end of the gasket is provided with a convex portion, and the convex portion of the first end of the gasket is in contact with the end wall and/or the annular flange of the first segment; and/or, the gasket
  • the end wall of the second end of the sheet is provided with a raised portion, and the raised portion of the second end of the gasket is in contact with the bushing.
  • the raised portion includes an annular boss, and the annular boss is arranged on the end wall of the gasket along the circumferential direction, or the raised portion includes a plurality of raised points, and the plurality of raised points are arranged at intervals along the circumferential direction on the end wall of the gasket.
  • the convex portion includes a plurality of arc-shaped bosses, and the plurality of arc-shaped bosses are arranged on the end wall of the gasket at intervals along the circumferential direction, or, the convex portion includes a plurality of arc-shaped bosses and a plurality of arc-shaped bosses.
  • a plurality of convex points are arranged on the end wall of the gasket at intervals along the circumferential direction, and the convex points are arranged between two adjacent arc-shaped convex platforms.
  • the raised portion adopts the structure of the annular boss
  • the gasket and other components are in line-to-surface contact, which can reduce the frictional force of the gasket compared with the surface-to-surface contact.
  • the protruding part adopts the structure of bumps
  • the gasket and other components are in point-to-surface contact, which can reduce the frictional force of the gasket compared with the surface-to-surface contact.
  • the convex part adopts the structure of the arc-shaped boss
  • the gasket and other components are in line-surface contact (similar to point-surface contact), which can reduce the friction force of the gasket compared with the surface-to-surface contact.
  • the convex part adopts a structure in which the convex point and the arc-shaped boss are matched
  • the gasket and other components are in point-surface contact and line-surface contact, which can reduce the friction force of the gasket compared with the surface-to-surface contact.
  • the height dimension of the raised portion is between 0.005mm and 0.1mm. Setting the height dimension of the raised portion within the above range can not only ensure the service life of the raised portion, but also not affect the number of pulses of the device.
  • the first end of the gasket is in contact with the end wall of the first section
  • the bushing is in contact with the end wall of the second section
  • the length dimension of the second section is greater than the thickness dimension of the gasket.
  • the outer wall of the screw is clearance-fitted with the inner wall of the annular flange
  • the outer wall of the gasket is clearance-fitted with the inner wall of the spring sleeve
  • the inner wall of the washer is clearance-fitted with the outer wall of the screw.
  • the screw can have a certain degree of freedom in the radial direction and a certain centering function, which can reduce the coaxiality between the valve needle component and the valve seat component during processing and assembly. deviation, improve valve opening performance and reduce internal leakage.
  • valve core assembly also includes a pressure sleeve, the pressure sleeve is inserted through the second end of the spring sleeve, the valve needle is inserted into the pressure sleeve, and the outer wall of the valve needle is provided with a limit boss, and the limit boss is connected with the limit boss.
  • the end walls of the compression sleeve abut against each other to limit the axial position of the valve needle in the spring sleeve.
  • each component can be loaded into the spring sleeve through the second end of the spring sleeve, and then the pressure sleeve can be fixed on the second end of the spring sleeve, Has the advantage of easy assembly.
  • the gasket includes a fourth section and a fifth section that are connected to each other, the diameter of the fourth section is larger than the diameter of the fifth section, the fourth section is in contact with the annular flange, and the spring is sleeved on the fifth section and the bushing. On the outside, one end of the spring abuts against the end wall of the fourth segment.
  • the gasket includes an engineering plastic part or a metal part provided with a wear-resistant coating on the outer surface.
  • an electronic expansion valve includes: a casing; a rotor assembly, rotatably disposed in the casing; a nut seat, disposed in the casing; and a valve core assembly, disposed in the casing
  • the screw rod of the valve core assembly passes through the nut seat, the rotor assembly is drivingly connected with the screw rod, and the valve core assembly is the valve core assembly provided above. Since the electronic expansion valve includes the valve core assembly provided above, the electronic expansion valve can also reduce the frictional force of the valve core assembly during the valve opening and closing process, thereby improving the performance and life of the opening and closing valve.
  • FIG. 1 shows a schematic structural diagram of a valve core assembly provided according to Embodiment 1 of the present application
  • Fig. 2 shows a partial enlarged view at A in Fig. 1;
  • FIG. 3 shows a schematic structural diagram of a valve core assembly provided according to Embodiment 2 of the present application
  • Fig. 4 shows a partial enlarged view at B in Fig. 3;
  • Figure 5 shows the assembly diagram of the screw, washer and bushing in Figure 3;
  • Figure 6 shows a cross-sectional view of the gasket in Figure 3;
  • Figure 7 shows a schematic structural diagram of the gasket in Figure 3.
  • Figure 8 shows a schematic structural diagram of the gasket in Figure 3.
  • Figure 9 shows a schematic structural diagram of the gasket in Figure 3.
  • Figure 10 shows a schematic structural diagram of the gasket in Figure 3;
  • FIG. 11 shows a schematic structural diagram of a valve core assembly provided according to Embodiment 3 of the present application.
  • Figure 12 shows a partial enlarged view at C in Figure 11;
  • FIG. 13 shows a schematic structural diagram of an electronic expansion valve provided according to Embodiment 4 of the present application.
  • FIG. 14 shows a schematic structural diagram of an electronic expansion valve provided according to Embodiment 4 of the present application.
  • FIG. 15 shows a schematic structural diagram of an electronic expansion valve provided according to Embodiment 4 of the present application.
  • a first embodiment of the present application provides a valve core assembly, which includes a spring sleeve 10 , a screw 20 , a limit assembly 30 , a valve needle 40 and a spring 50 , and the limit assembly 30 and the spring 50 are located in the spring cover 10 .
  • the spring sleeve 10 has a first end and a second end opposite to each other, the first end of the spring sleeve 10 is provided with an annular flange 11, one end of the screw 20 passes through the annular flange 11 and extends into the spring sleeve 10, the valve One end of the needle 40 extends into the second end of the spring housing 10 .
  • the limiting assembly 30 includes a washer 31 and a bushing 32 , the washer 31 is rotatably sleeved on the screw rod 20 , one end of the spring 50 is in contact with the washer 31 , and the other end of the spring 50 is in contact with the valve needle 40 Then, under the action of the elastic force of the spring 50 , the first end of the gasket 31 will abut with the annular flange 11 , and the annular flange 11 can restrict the gasket 31 from disengaging from the spring sleeve 10 .
  • the bushing 32 is arranged on the screw rod 20 and is located at the second end of the washer 31 . The bushing 32 can limit the axial position of the washer 31 relative to the screw rod 20 to prevent the washer 31 from separating from the screw rod 20 .
  • the gasket 31 and the bushing 32 are used to cooperate, in the process of opening and closing the valve, since the gasket 31 is rotatably sleeved on the screw 20, the first end of the gasket 31 can be Rotating relative to the annular flange 11, the second end of the gasket 31 can be rotated relative to the bushing 32, and multiple components of the valve core assembly can be rotated relative to each other, which can reduce the friction force of the valve core assembly during the valve opening and closing process. , which can improve the performance and life of the on-off valve.
  • the screw 20 includes a first stage and a second stage, the gasket 31 is arranged on the first stage, and the bushing 32 is arranged on the second stage.
  • the axial position of the gasket 31 can be defined by the first stage and the bushing 32, and the axial position of the bushing 32 can be defined by the second stage and the gasket 31. Adopting the method of arranging the stepped structure on the screw 20 has the advantages of simple structure and convenient processing.
  • the screw 20 includes a first segment 21 , a second segment 22 and a third segment 23 which are connected in sequence and decrease in diameter in sequence.
  • the second segment 22 forms the first stage
  • the three sections 23 form the second stage
  • the gasket 31 is sleeved on the second section 22
  • the bushing 32 is sleeved on the third section 23 and connected to the third section 23 . Since the screw 20 is provided with two stepped structures, by arranging the bushing 32 on the third section 23 at the end and connecting the bushing 32 with the third section 23, the washer 31 can be used to limit the movement of the washer 31 on the screw. 20 on the position.
  • the bushing 32 can be fixed on the third section 23 by means of interference fit or welding.
  • the bushing 32 is first set on the third section 23 by interference fit, and then further fixed by laser welding, which can not only ensure the connection firmness of the bushing 32, but also ensure the bushing Coaxiality of the sleeve 32 with the screw 20 .
  • the first end of the gasket 31 is in contact with the end wall of the first segment 21
  • the bushing 32 is in contact with the second end of the gasket 31
  • the second end of the second segment 22 is in contact with each other.
  • the length dimension is smaller than the thickness dimension of the spacer 31 .
  • the outer wall of the screw 20 is in clearance fit with the inner wall of the annular flange 11
  • the outer wall of the gasket 31 is in clearance fit with the inner wall of the spring sleeve 10
  • the inner wall of the gasket 31 is in clearance with the outer wall of the screw 20 . Clearance fit.
  • the screw 20 can have a certain degree of freedom in the radial direction, and has a certain centering function, which can reduce the The coaxiality deviation between the valve needle part and the valve seat part is processed and assembled to improve the valve opening performance and reduce the internal leakage.
  • the valve core assembly further includes a pressure sleeve 60 , the pressure sleeve 60 is inserted through the second end of the spring sleeve 10 , and the valve needle 40 is inserted into the pressure sleeve 60 , a limiting boss 41 is set on the outer wall of the valve needle 40 .
  • the gasket 31 includes a fourth segment 312 and a fifth segment 313 that are connected to each other, the diameter of the fourth segment 312 is larger than that of the fifth segment 313 , and the outer wall of the fourth segment 312 is the same as the diameter of the fifth segment 313 .
  • the inner wall of the spring sleeve 10 is clearance fit.
  • the upper surface of the fourth section 312 is in contact with the lower surface of the annular flange 11
  • the spring 50 is sleeved on the outer side of the fifth section 313 and the bushing 32 , and one end of the spring 50 is in contact with the end wall of the fourth section 312 .
  • a step structure is formed between the fourth segment 312 and the fifth segment 313, and the spring 50 can be easily assembled by using the step structure, and the spring can be ensured
  • the outer wall of 50 does not interfere with the inner wall of spring cover 10 .
  • the diameter of the fifth section 313 is the same as the diameter of the bushing 32 , which facilitates the assembly of the spring 50 , and the bushing 32 will not interfere with the spring 50 during the deformation of the spring 50 .
  • the gasket 31 can be an engineering plastic part or a metal part. If the gasket 31 is a metal part, the outer surface of the metal part is provided with a wear-resistant coating with a low friction coefficient.
  • the friction coefficient of the gasket 31 can be reduced, which can further reduce the friction force between the various components, improve the valve opening performance, and also improve the wear resistance of the gasket 31, so that the friction force of the gasket 31 can be improved. service life.
  • the second embodiment of the present application provides a valve core assembly.
  • the difference between the second embodiment and the first embodiment is that in the second embodiment, the end wall of the second end of the gasket 31 is provided on the end wall. There is a raised portion 311 , and the raised portion 311 at the second end of the gasket 31 abuts against the bushing 32 .
  • the protrusions 311 By providing the protrusions 311 , the contact area between the washer 31 and the bushing 32 can be reduced, so that the frictional force between the washer 31 and the bushing 32 can be further reduced.
  • the protrusions 311 can reduce the thermal influence on the gasket 31 when the bushing 32 and the screw 20 are welded, and prevent the gasket from being damaged.
  • a raised portion 311 may be provided on the end wall of the first end of the gasket 31 , and the raised portion 311 at the first end of the gasket 31 and the end wall of the first segment 21 and the annular flange can be used 11 abuts.
  • the protruding portion 311 of the first end of the gasket 31 is used to abut against the end wall or the annular flange 11 of the first segment 21 .
  • protrusions 311 can be provided on the end wall of the first end and the end wall of the second end of the gasket 31 at the same time, which can minimize the friction between the gasket 31 and other components and improve the valve opening performance.
  • the raised portion 311 includes the following four structures:
  • the raised portion 311 includes an annular boss 3111, and the annular boss 3111 is circumferentially disposed on the end wall of the gasket 31 (FIG. 9 and FIG. 10);
  • the protruding portion 311 includes a plurality of protruding points 3112, and the plurality of protruding points 3112 are arranged on the end wall of the gasket 31 at intervals along the circumferential direction (FIG. 7 and FIG. 8);
  • the convex portion 311 includes a plurality of arc-shaped bosses, and the plurality of arc-shaped bosses are arranged on the end wall of the gasket 31 at intervals along the circumferential direction;
  • the convex portion 311 includes a plurality of arc-shaped bosses and a plurality of convex points 3112, the plurality of arc-shaped bosses are arranged on the end wall of the gasket 31 at intervals along the circumferential direction, and the convex points 3112 are arranged on the adjacent two between the arc-shaped bosses.
  • the gasket 31 is in line-to-surface contact with other components, which can reduce the frictional force of the gasket 31 compared with the surface-to-surface contact.
  • the gasket 31 is in point-to-surface contact with other components, which can reduce the frictional force of the gasket 31 compared with the surface-to-surface contact.
  • the convex part 311 adopts the structure of the arc-shaped boss (the third structure)
  • the gasket 31 and other components are in line-surface contact (similar to point-to-surface contact), which can reduce the size of the gasket 31 compared with the surface-to-surface contact. friction force.
  • the convex part 311 adopts the structure in which the convex point 3112 and the arc-shaped boss are matched (the fourth structure)
  • the gasket 31 is in point-surface contact and line-surface contact with other components. Compared with the surface-to-surface contact, it can reduce the The friction force of the small spacer 31 .
  • the height dimension of the protruding portion 311 is between 0.005 mm and 0.1 mm. Setting the height dimension of the protruding portion 311 within the above range can not only ensure the service life of the protruding portion 311 but also not affect the number of pulses of the device. If the height dimension of the raised portion 311 is less than 0.005 mm or greater than 0.1 mm, the service life of the raised portion 311 and the number of pulses of the device cannot be guaranteed.
  • the third embodiment of the present application provides a valve core assembly.
  • the difference between the third embodiment and the first embodiment is that in the third embodiment, the first end of the gasket 31 and the first section The end wall of 21 abuts, the bushing 32 abuts against the end wall of the second section 22, and the length dimension of the second section 22 is greater than the thickness dimension of the gasket 31, and the second end of the gasket 31 and the bushing 32 are in contact with each other. with gaps.
  • the washer 31 has a certain movable space relative to the screw 20 in the axial direction, and the frictional force between the washer 31 and other components can be further reduced in the process of opening and closing the valve.
  • the second section 22 is used to limit the bushing 32, which can avoid exerting force on the gasket 31 when the bushing 32 is press-fitted, and ensure the gasket 31 will not be damaged by force.
  • the fourth embodiment of the present application provides an electronic expansion valve.
  • the electronic expansion valve includes a housing 70 , a rotor assembly 80 , a nut seat 90 and a valve core assembly.
  • the rotor assembly 80 and the nut seat 90 The valve core assembly and the valve core assembly are all disposed in the housing 70, and the valve core assembly is the valve core assembly provided above.
  • the rotor assembly 80 is rotatably disposed in the housing 70, the screw rod 20 of the valve core assembly is passed through the nut seat 90, and the rotor assembly 80 is drivingly connected with the screw rod 20 to drive the valve core assembly to move relative to the valve port, thereby realizing switch valve.
  • valve core assembly in FIG. 13 is the valve core assembly in the first embodiment
  • the valve core assembly in FIG. 14 is the valve core assembly in the second embodiment
  • the valve core assembly in FIG. 15 is the valve core assembly in the third embodiment. core assembly.
  • the electronic expansion valve includes the valve core assembly provided above, the electronic expansion valve can also reduce the frictional force of the valve core assembly during the valve opening and closing process, thereby improving the valve opening and closing performance.
  • the setting of the gasket can reduce the friction between the various components of the expansion valve when the valve is open and closed, avoid the wear between the valve needle and the valve port, and improve the valve opening performance and life;
  • the screw has a certain degree of freedom in the radial direction and has a certain centering function, which can reduce the coaxiality deviation between the valve needle part and the valve seat part during processing and assembly, improve the valve opening performance, and reduce internal leakage.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

一种阀芯组件以及电子膨胀阀，该阀芯组件包括：弹簧套（10），具有相对设置的第一端和第二端，弹簧套（10）的第一端设置有环形翻边（11）；螺杆（20），螺杆（20）的一端穿过环形翻边（11）并伸入弹簧套（10）内；限位组件（30），位于弹簧套（10）内，限位组件（30）包括垫片（31）和衬套（32），垫片（31）可转动地套设在螺杆（20）上，垫片（31）的第一端与环形翻边（11）相抵接，衬套（32）设置在螺杆（20）上并位于垫片（31）的第二端，以限制垫片（31）相对螺杆（20）的轴向位置；阀针（40），阀针（40）的一端伸入弹簧套（10）的第二端内；弹簧（50），位于弹簧套（10）内，弹簧（50）的一端与垫片（31）相抵接，弹簧（50）的另一端与阀针（40）相抵接。

Description

阀芯组件以及电子膨胀阀
本申请要求以下专利申请的优先权：
1)2020年10月16日提交至中国国家知识产权局、申请号为202011111737.2、发明名称为“阀芯组件以及电子膨胀阀”的专利申请的优先权；
2)2020年10月16日提交至中国国家知识产权局、申请号为202022319470.8、发明名称为“阀芯组件以及电子膨胀阀”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，涉及一种阀芯组件以及电子膨胀阀。
背景技术
目前，电子膨胀阀包括壳体和阀芯组件，阀芯组件设置在壳体内，利用阀芯组件可进行开关阀操作。其中，阀芯组件包括弹簧套、弹簧、衬套、压套以及螺杆，弹簧、衬套以及压套均设置在弹簧套内，压套与弹簧套固定连接，螺杆的一端穿设在弹簧套内，衬套焊接在螺杆的端部，弹簧抵接在衬套上，以使衬套的上表面与压套的下表面相贴合。
在开关阀的过程中，由于螺杆和衬套被弹簧直接抵在压套上，螺杆和衬套会相对压套转动时，衬套和压套之间的摩擦力过大，影响开阀性能，同时可能会带动阀针与阀口之间发生相对旋转摩擦，导致产品寿命不良。
因此，相关技术中存在阀芯组件摩擦力过大，影响开阀性能及寿命的问题。
发明内容
本申请提供一种阀芯组件以及电子膨胀阀，以解决相关技术中的阀芯组件摩擦力过大，影响开阀性能及寿命的问题。
根据本申请的一个方面，提供了一种阀芯组件，阀芯组件包括：弹簧套，具有相对设置的第一端和第二端，弹簧套的第一端设置有环形翻边；螺杆，螺杆的一端穿过环形翻边并伸入弹簧套内；限位组件，位于弹簧套内，限位组件包括垫片和衬套，垫片可转动地套设在螺杆上，垫片的第一端与环形翻边相抵接，衬套设置在螺杆上并位于垫片的第二端，以限制垫片相对螺杆的轴向位置；阀针，阀针的一端伸入弹簧套的第二端内；弹簧，位于弹簧套内，弹簧的一端与垫片相抵接，弹簧的另一端与阀针相抵接。
应用本申请的技术方案，该阀芯组件包括弹簧套、螺杆、限位组件、阀针以及弹簧，限位组件和弹簧均位于弹簧套内，限位组件包括垫片和衬套。其中，弹簧套的第一端设置有环形翻边，螺杆的一端穿过环形翻边并伸入弹簧套内，阀针的一端伸入弹簧套的第二端内。通 过在螺杆上可转动地套设垫片，将衬套设置在螺杆上并位于垫片的第二端，利用衬套可限制垫片相对螺杆的轴向位置，由于弹簧的一端与垫片相抵接，弹簧的另一端与阀针相抵接，在弹簧的弹性力的作用下，垫片的第一端会与环形翻边相抵接。采用上述结构，在开关阀的过程中，由于垫片可转动地套设在螺杆上，垫片的第一端可相对环形翻边转动，垫片的第二端可相对衬套转动，如此能够减小阀芯组件在开关阀过程中的摩擦力，进而能够提升开关阀性能。
进一步地，螺杆包括第一台阶段和第二台阶段，垫片设置在第一台阶段上，衬套设置在第二台阶段上。利用第一台阶段和衬套相配合可对垫片的轴向位置进行限定，利用第二台阶段与垫片相配合可对衬套的轴向位置进行限定。采用在螺杆上设置台阶结构的方式，具有结构简单，便于加工的优点。
进一步地，螺杆包括顺次连接且直径依次减小的第一段、第二段以及第三段，第二段形成第一台阶段，第三段形成第二台阶段，垫片套设在第二段上，衬套套设在第三段上并与第三段连接。由于螺杆上设置有两个台阶结构，通过将衬套设置在末端的第三段上，并使衬套与第三段连接，利用衬套即可限制垫片在螺杆上的位置。
进一步地，垫片的第一端与第一段的端壁相抵接，衬套与垫片的第二端相抵接，且第二段的长度尺寸小于垫片的厚度尺寸。采用上述结构，衬套与第二段的端壁之间具有间隙，利用该间隙能够避免衬套直接与第二段相接触，从而能够减小衬套与第二段之间的摩擦力，能够进一步减小阀芯组件在开关阀过程中的摩擦力，提升开关阀性能。
进一步地，垫片的第一端的端壁上设置有凸起部，垫片的第一端的凸起部与第一段的端壁和/或环形翻边相抵接；和/或，垫片的第二端的端壁上设置有凸起部，垫片的第二端的凸起部与衬套相抵接。通过设置凸起部，能够减小垫片与衬套的接触面积，从而能够进一步减小垫片与衬套之间的摩擦力。并且，在对衬套进行焊接时，利用凸起部能够减少衬套与螺杆焊接时对垫片的热影响，避免垫片受损。
进一步地，凸起部包括环形凸台，环形凸台沿周向设置在垫片的端壁上，或，凸起部包括多个凸点，多个凸点沿周向间隔设置在垫片的端壁上，或，凸起部包括多个弧形凸台，多个弧形凸台沿周向间隔设置在垫片的端壁上，或，凸起部包括多个弧形凸台和多个凸点，多个弧形凸台沿周向间隔设置在垫片的端壁上，凸点设置在相邻两个弧形凸台之间。在凸起部采用环形凸台的结构时，垫片与其它部件为线面接触，相比于面面接触，能够减小垫片的摩擦力。在凸起部采用凸点的结构时，垫片与其它部件为点面接触，相比于面面接触，能够减小垫片的摩擦力。在凸起部采用弧形凸台的结构时，垫片与其它部件为线面接触(类似点面接触)，相比于面面接触，能够减小垫片的摩擦力。在凸起部采用凸点和弧形凸台相配合的结构时，垫片与其它部件为点面接触以及线面接触，相比于面面接触，能够减小垫片的摩擦力。
进一步地，凸起部的高度尺寸在0.005mm至0.1mm之间。将凸起部的高度尺寸设置在上述区间内，既能够保证凸起部的使用寿命，又不会影响装置的脉冲数。
进一步地，垫片的第一端与第一段的端壁相抵接，衬套与第二段的端壁相抵接，且第二段的长度尺寸大于垫片的厚度尺寸。采用上述结构，垫片在轴向上相对螺杆具有一定的活动空间，在开关阀的过程中，能够进一步降低垫片与其它部件之间的摩擦力。并且，当衬套采用焊接的方式固定在螺杆上时，由于垫片的第二端与衬套之间具有间隙，衬套焊接时的热量不会传递到垫片上，保证垫片不会受热损坏。当衬套采用过盈配合的方式压装在螺杆上时，利用第二段对衬套进行限位，能够避免压装衬套时对垫片施加作用力，保证垫片不会受力破损。
进一步地，螺杆的外壁与环形翻边的内壁间隙配合，垫片的外壁与弹簧套的内壁间隙配合，垫片的内壁与螺杆的外壁间隙配合。采用上述结构，在螺杆相对弹簧套转动地过程中，环形翻边、垫片以及螺杆三者之间不会发生干涉，能够保证螺杆顺利转动，并减小各个部件之间的摩擦。并且，由于上述部件在径向方向上具有间隙，即螺杆在径向可以有一定自由度，有一定调心功能，能够减小加工和装配对阀针部件和阀座部件之间的同轴度偏差，提高开阀性能，减小内泄漏。
进一步地，阀芯组件还包括压套，压套过盈穿设在弹簧套的第二端，阀针穿设在压套内，阀针的外壁上设置有限位凸台，限位凸台与压套的端壁相抵接，以限制阀针在弹簧套内的轴向位置。采用上述结构，通过设置压套，在对阀芯组件进行装配时，可先将各部件通过弹簧套的第二端装入弹簧套内，然后再将压套固定在弹簧套的第二端，具有便于装配的优点。
进一步地，垫片包括相互连接的第四段和第五段，第四段的直径大于第五段的直径，第四段与环形翻边相抵接，弹簧套设在第五段和衬套的外侧，弹簧的一端与第四段的端壁相抵接。通过将垫片设置为直径不同的第四段和第五段，第四段和第五段之间形成台阶结构，利用该台阶结构便于对弹簧进行装配，并能够保证弹簧的外壁不会与弹簧套的内壁发生干涉。
进一步地，垫片包括工程塑料件或外表面设置有耐磨镀层的金属件。采用上述结构，可以减小垫片的摩擦系数，如此能够进一步减小各部件之间的摩擦力，提升开阀性能，还可以提升垫片的耐磨性，如此能够提升垫片的使用寿命。
根据本申请的另一方面，提供了一种电子膨胀阀，电子膨胀阀包括：壳体；转子组件，可转动地设置在壳体内；螺母座，设置在壳体内；阀芯组件，设置在壳体内，阀芯组件的螺杆穿设在螺母座内，转子组件与螺杆驱动连接，阀芯组件为上述提供的阀芯组件。由于该电子膨胀阀包括上述提供的阀芯组件，因此该电子膨胀阀同样能够减小阀芯组件在开关阀过程中的摩擦力，进而能够提升开关阀性能及寿命。
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阀芯组件的结构示意图；
图2示出了图1中A处的局部放大图；
图3示出了根据本申请实施例二提供的阀芯组件的结构示意图；
图4示出了图3中B处的局部放大图；
图5示出了图3中的螺杆、垫片以及衬套的装配图；
图6示出了图3中的垫片的剖视图；
图7示出了图3中的垫片的结构示意图；
图8示出了图3中的垫片的结构示意图；
图9示出了图3中的垫片的结构示意图；
图10示出了图3中的垫片的结构示意图；
图11示出了根据本申请实施例三提供的阀芯组件的结构示意图；
图12示出了图11中C处的局部放大图；
图13示出了根据本申请实施例四提供的电子膨胀阀的结构示意图；
图14示出了根据本申请实施例四提供的电子膨胀阀的结构示意图；
图15示出了根据本申请实施例四提供的电子膨胀阀的结构示意图。
其中，上述附图包括以下附图标记：
10、弹簧套；11、环形翻边；20、螺杆；21、第一段；22、第二段；23、第三段；30、限位组件；31、垫片；311、凸起部；3111、环形凸台；3112、凸点；312、第四段；313、第五段；32、衬套；40、阀针；41、限位凸台；50、弹簧；60、压套；70、壳体；80、转子组件；90、螺母座。
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和图2所示，本申请实施例一提供了一种阀芯组件，该阀芯组件包括弹簧套10、螺杆20、限位组件30、阀针40以及弹簧50，限位组件30和弹簧50均位于弹簧套10内。其中，弹簧套10具有相对设置的第一端和第二端，弹簧套10的第一端设置有环形翻边11，螺杆20的一端穿过环形翻边11并伸入弹簧套10内，阀针40的一端伸入弹簧套10的第二端内。 具体地，限位组件30包括垫片31和衬套32，垫片31可转动地套设在螺杆20上，弹簧50的一端与垫片31相抵接，弹簧50的另一端与阀针40相抵接，在弹簧50的弹性力的作用下，垫片31的第一端会与环形翻边11相抵接，利用环形翻边11可限制垫片31从弹簧套10内脱离。将衬套32设置在螺杆20上并位于垫片31的第二端，利用衬套32可以限制垫片31相对螺杆20的轴向位置，避免垫片31从螺杆20上脱离。
应用本实施例提供的阀芯组件，利用垫片31和衬套32相配合，在开关阀的过程中，由于垫片31可转动地套设在螺杆20上，垫片31的第一端可相对环形翻边11转动，垫片31的第二端可相对衬套32转动，阀芯组件的多个部件之间均可相对转动，如此能够减小阀芯组件在开关阀过程中的摩擦力，进而能够提升开关阀性能及寿命。
在本实施例中，螺杆20包括第一台阶段和第二台阶段，垫片31设置在第一台阶段上，衬套32设置在第二台阶段上。利用第一台阶段和衬套32相配合可对垫片31的轴向位置进行限定，利用第二台阶段与垫片31相配合可对衬套32的轴向位置进行限定。采用在螺杆20上设置台阶结构的方式，具有结构简单，便于加工的优点。
如图2所示，在本实施例中，螺杆20包括顺次连接且直径依次减小的第一段21、第二段22以及第三段23，第二段22形成第一台阶段，第三段23形成第二台阶段，垫片31套设在第二段22上，衬套32套设在第三段23上并与第三段23连接。由于螺杆20上设置有两个台阶结构，通过将衬套32设置在末端的第三段23上，并使衬套32与第三段23连接，利用衬套32即可限制垫片31在螺杆20上的位置。
其中，衬套32可通过过盈配合或焊接的方式固定在第三段23上。在本实施例中，衬套32先通过过盈配合的方式设置在第三段23上，然后再通过激光焊接的方式进一步固定，如此既能够保证衬套32的连接牢固性，还能够保证衬套32与螺杆20的同轴度。
如图2所示，在本实施例中，垫片31的第一端与第一段21的端壁相抵接，衬套32与垫片31的第二端相抵接，且第二段22的长度尺寸小于垫片31的厚度尺寸。采用上述结构，衬套32与第二段22的端壁之间具有间隙，利用该间隙能够避免衬套32直接与第二段22相接触，从而能够减小衬套32与第二段22之间的摩擦力，能够进一步减小阀芯组件在开关阀过程中的摩擦力，提升开关阀性能。
如图2所示，在本实施例中，螺杆20的外壁与环形翻边11的内壁间隙配合，垫片31的外壁与弹簧套10的内壁间隙配合，垫片31的内壁与螺杆20的外壁间隙配合。采用上述结构，在螺杆20相对弹簧套10转动地过程中，环形翻边11、垫片31以及螺杆20三者之间不会发生干涉，能够保证螺杆20顺利转动，并减小各个部件之间的摩擦。
并且，由于上述部件在径向方向上具有间隙(主要是垫片31的内壁与螺杆20的外壁间隙配合)，即螺杆20在径向可以有一定自由度，有一定调心功能，能够减小加工和装配对阀针部件和阀座部件之间的同轴度偏差，提高开阀性能，减小内泄漏。
如图1和图2所示，在本实施例中，阀芯组件还包括压套60，压套60过盈穿设在弹簧套10的第二端，阀针40穿设在压套60内，阀针40的外壁上设置有限位凸台41，限位凸台41与压套60的端壁相抵接，以限制阀针40在弹簧套10内的轴向位置。采用上述结构，通过设置压套60，在对阀芯组件进行装配时，可先将各部件通过弹簧套10的第二端装入弹簧套10内，然后再将压套60固定在弹簧套10的第二端，具有便于装配的优点。
如图2所示，在本实施例中，垫片31包括相互连接的第四段312和第五段313，第四段312的直径大于第五段313的直径，第四段312的外壁与弹簧套10的内壁间隙配合。其中，第四段312的上表面与环形翻边11的下表面相抵接，弹簧50套设在第五段313和衬套32的外侧，弹簧50的一端与第四段312的端壁相抵接。
通过将垫片31设置为直径不同的第四段312和第五段313，第四段312和第五段313之间形成台阶结构，利用该台阶结构便于对弹簧50进行装配，并能够保证弹簧50的外壁不会与弹簧套10的内壁发生干涉。
在本实施例中，第五段313的直径与衬套32的直径相同，如此便于装配弹簧50，且在弹簧50发生形变的过程中，衬套32不会对弹簧50造成干涉。
在本实施例中，垫片31可以为工程塑料件或金属件，若垫片31为金属件，则金属件的外表面设置有低摩擦系数的耐磨镀层。采用上述结构，可以减小垫片31的摩擦系数，如此能够进一步减小各部件之间的摩擦力，提升开阀性能，还可以提升垫片31的耐磨性，如此能够提升垫片31的使用寿命。
如图3至图10所示，本申请实施例二提供了一种阀芯组件，实施例二与实施例一的区别在于，在实施例二中，垫片31的第二端的端壁上设置有凸起部311，垫片31的第二端的凸起部311与衬套32相抵接。通过设置凸起部311，能够减小垫片31与衬套32的接触面积，从而能够进一步减小垫片31与衬套32之间的摩擦力。并且，在对衬套32进行焊接时，利用凸起部311能够减少衬套32与螺杆20焊接时对垫片31的热影响，避免垫片受损。
在其它实施例中，可以在垫片31的第一端的端壁上设置凸起部311，利用垫片31的第一端的凸起部311与第一段21的端壁和环形翻边11相抵接。或者，利用垫片31的第一端的凸起部311与第一段21的端壁或环形翻边11相抵接。
或者，可同时在垫片31的第一端的端壁和第二端的端壁上设置凸起部311，如此能够最大程度地减小垫片31与其它部件的摩擦力，提升开阀性能。
其中，凸起部311包括以下四种结构：
第一种，凸起部311包括环形凸台3111，环形凸台3111沿周向设置在垫片31的端壁上(图9和图10)；
第二种，凸起部311包括多个凸点3112，多个凸点3112沿周向间隔设置在垫片31的端壁上(图7和图8)；
第三种，凸起部311包括多个弧形凸台，多个弧形凸台沿周向间隔设置在垫片31的端壁上；
第四种，凸起部311包括多个弧形凸台和多个凸点3112，多个弧形凸台沿周向间隔设置在垫片31的端壁上，凸点3112设置在相邻两个弧形凸台之间。
在凸起部311采用环形凸台3111的结构时(第一种结构)，垫片31与其它部件为线面接触，相比于面面接触，能够减小垫片31的摩擦力。
在凸起部311采用凸点3112的结构时(第二种结构)，垫片31与其它部件为点面接触，相比于面面接触，能够减小垫片31的摩擦力。
在凸起部311采用弧形凸台的结构时(第三种结构)，垫片31与其它部件为线面接触(类似点面接触)，相比于面面接触，能够减小垫片31的摩擦力。
在凸起部311采用凸点3112和弧形凸台相配合的结构时(第四种结构)，垫片31与其它部件为点面接触以及线面接触，相比于面面接触，能够减小垫片31的摩擦力。
在本实施例中，凸起部311的高度尺寸在0.005mm至0.1mm之间。将凸起部311的高度尺寸设置在上述区间内，既能够保证凸起部311的使用寿命，又不会影响装置的脉冲数。若凸起部311的高度尺寸小于0.005mm或大于0.1mm，凸起部311的使用寿命和装置的脉冲数无法得到保证。
如图11和图12所示，本申请实施例三提供了一种阀芯组件，实施例三与实施例一的区别在于，在实施例三中，垫片31的第一端与第一段21的端壁相抵接，衬套32与第二段22的端壁相抵接，且第二段22的长度尺寸大于垫片31的厚度尺寸，垫片31的第二端与衬套32之间具有间隙。采用上述结构，垫片31在轴向上相对螺杆20具有一定的活动空间，在开关阀的过程中，能够进一步降低垫片31与其它部件之间的摩擦力。
并且，当衬套32采用焊接的方式固定在螺杆20上时，由于垫片31的第二端与衬套32之间具有间隙，衬套32焊接时的热量不会传递到垫片31上，保证垫片31不会受热损坏。当衬套32采用过盈配合的方式压装在螺杆20上时，利用第二段22对衬套32进行限位，能够避免压装衬套32时对垫片31施加作用力，保证垫片31不会受力破损。
如图13至图15所示，本申请实施例四提供了一种电子膨胀阀，该电子膨胀阀包括壳体70、转子组件80、螺母座90以及阀芯组件，转子组件80、螺母座90以及阀芯组件均设置在壳体70内，阀芯组件为上述提供的阀芯组件。其中，转子组件80可转动地设置在壳体70内，阀芯组件的螺杆20穿设在螺母座90内，转子组件80与螺杆20驱动连接，以驱动阀芯组件相对阀口移动，进而实现开关阀。
其中，图13中的阀芯组件为实施例一中的阀芯组件，图14中的阀芯组件为实施例二中的阀芯组件，图15中的阀芯组件为实施例三中的阀芯组件。
由于该电子膨胀阀包括上述提供的阀芯组件，因此该电子膨胀阀同样能够减小阀芯组件在开关阀过程中的摩擦力，进而能够提升开关阀性能。
通过实施例提供的装置，具有以下有益效果：
(1)垫片的设置可以减小膨胀阀在开阀和关阀状态下各个部件之间的摩擦力，避免阀针、阀口之间发生磨损，提高开阀性能和寿命；
(2)螺杆在径向有一定自由度，有一定调心功能，能够减小加工和装配对阀针部件和阀座部件之间的同轴度偏差，提高开阀性能，减小内泄漏。
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 (13)

  1. 一种阀芯组件，其特征在于，所述阀芯组件包括：
    弹簧套(10)，具有相对设置的第一端和第二端，所述弹簧套(10)的第一端设置有环形翻边(11)；
    螺杆(20)，所述螺杆(20)的一端穿过所述环形翻边(11)并伸入所述弹簧套(10)内；
    限位组件(30)，位于所述弹簧套(10)内，所述限位组件(30)包括垫片(31)和衬套(32)，所述垫片(31)可转动地套设在所述螺杆(20)上，所述垫片(31)的第一端与所述环形翻边(11)相抵接，所述衬套(32)设置在所述螺杆(20)上并位于所述垫片(31)的第二端，以限制所述垫片(31)相对所述螺杆(20)的轴向位置；
    阀针(40)，所述阀针(40)的一端伸入所述弹簧套(10)的第二端内；
    弹簧(50)，位于所述弹簧套(10)内，所述弹簧(50)的一端与所述垫片(31)相抵接，所述弹簧(50)的另一端与所述阀针(40)相抵接。
  2. 根据权利要求1所述的阀芯组件，其特征在于，所述螺杆(20)包括第一台阶段和第二台阶段，所述垫片(31)设置在所述第一台阶段上，所述衬套(32)设置在所述第二台阶段上。
  3. 根据权利要求2所述的阀芯组件，其特征在于，所述螺杆(20)包括顺次连接且直径依次减小的第一段(21)、第二段(22)以及第三段(23)，所述第二段(22)形成所述第一台阶段，所述第三段(23)形成所述第二台阶段，所述垫片(31)套设在所述第二段(22)上，所述衬套(32)套设在所述第三段(23)上并与所述第三段(23)连接。
  4. 根据权利要求3所述的阀芯组件，其特征在于，所述垫片(31)的第一端与所述第一段(21)的端壁相抵接，所述衬套(32)与所述垫片(31)的第二端相抵接，且所述第二段(22)的长度尺寸小于所述垫片(31)的厚度尺寸。
  5. 根据权利要求4所述的阀芯组件，其特征在于，
    所述垫片(31)的第一端的端壁上设置有凸起部(311)，所述垫片(31)的第一端的凸起部(311)与所述第一段(21)的端壁和/或所述环形翻边(11)相抵接；和/或，
    所述垫片(31)的第二端的端壁上设置有凸起部(311)，所述垫片(31)的第二端的凸起部(311)与所述衬套(32)相抵接。
  6. 根据权利要求5所述的阀芯组件，其特征在于，
    所述凸起部(311)包括环形凸台(3111)，所述环形凸台(3111)沿周向设置在所述垫片(31)的端壁上，或，
    所述凸起部(311)包括多个凸点(3112)，多个所述凸点(3112)沿周向间隔设置 在所述垫片(31)的端壁上，或，
    所述凸起部(311)包括多个弧形凸台，多个所述弧形凸台沿周向间隔设置在所述垫片(31)的端壁上，或，
    所述凸起部(311)包括多个弧形凸台和多个凸点(3112)，多个所述弧形凸台沿周向间隔设置在所述垫片(31)的端壁上，所述凸点(3112)设置在相邻两个所述弧形凸台之间。
  7. 根据权利要求5所述的阀芯组件，其特征在于，所述凸起部(311)的高度尺寸在0.005mm至0.1mm之间。
  8. 根据权利要求3所述的阀芯组件，其特征在于，所述垫片(31)的第一端与所述第一段(21)的端壁相抵接，所述衬套(32)与所述第二段(22)的端壁相抵接，且所述第二段(22)的长度尺寸大于所述垫片(31)的厚度尺寸。
  9. 根据权利要求1至8任一项所述的阀芯组件，其特征在于，所述螺杆(20)的外壁与所述环形翻边(11)的内壁间隙配合，所述垫片(31)的外壁与所述弹簧套(10)的内壁间隙配合，所述垫片(31)的内壁与所述螺杆(20)的外壁间隙配合。
  10. 根据权利要求1至8任一项所述的阀芯组件，其特征在于，所述阀芯组件还包括压套(60)，所述压套(60)过盈穿设在所述弹簧套(10)的第二端，所述阀针(40)穿设在所述压套(60)内，所述阀针(40)的外壁上设置有限位凸台(41)，所述限位凸台(41)与所述压套(60)的端壁相抵接，以限制所述阀针(40)在所述弹簧套(10)内的轴向位置。
  11. 根据权利要求1至8任一项所述的阀芯组件，其特征在于，所述垫片(31)包括相互连接的第四段(312)和第五段(313)，所述第四段(312)的直径大于所述第五段(313)的直径，所述第四段(312)与所述环形翻边(11)相抵接，所述弹簧(50)套设在所述第五段(313)和所述衬套(32)的外侧，所述弹簧(50)的一端与所述第四段(312)的端壁相抵接。
  12. 根据权利要求1至8任一项所述的阀芯组件，其特征在于，所述垫片(31)包括工程塑料件或外表面设置有耐磨镀层的金属件。
  13. 一种电子膨胀阀，其特征在于，所述电子膨胀阀包括：
    壳体(70)；
    转子组件(80)，可转动地设置在所述壳体(70)内；
    螺母座(90)，设置在所述壳体(70)内；
    阀芯组件，设置在所述壳体(70)内，所述阀芯组件的螺杆(20)穿设在所述螺母座(90)内，所述转子组件(80)与所述螺杆(20)驱动连接，所述阀芯组件为权利要求1至12中任一项所述的阀芯组件。
PCT/CN2021/122305 2020-10-16 2021-09-30 阀芯组件以及电子膨胀阀 WO2022078233A1 (zh)

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