WO2023066116A1 - 阀针部件及流量调节阀 - Google Patents

阀针部件及流量调节阀 Download PDF

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Publication number
WO2023066116A1
WO2023066116A1 PCT/CN2022/124930 CN2022124930W WO2023066116A1 WO 2023066116 A1 WO2023066116 A1 WO 2023066116A1 CN 2022124930 W CN2022124930 W CN 2022124930W WO 2023066116 A1 WO2023066116 A1 WO 2023066116A1
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WO
WIPO (PCT)
Prior art keywords
rod segment
bearing
rod
cavity
valve
Prior art date
Application number
PCT/CN2022/124930
Other languages
English (en)
French (fr)
Inventor
贺宇辰
刘乐强
陈勇好
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
Priority claimed from CN202122531063.8U external-priority patent/CN216200583U/zh
Priority claimed from CN202122545371.6U external-priority patent/CN216200589U/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 EP22882726.7A priority Critical patent/EP4421360A1/en
Priority to KR1020247016144A priority patent/KR20240093615A/ko
Publication of WO2023066116A1 publication Critical patent/WO2023066116A1/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
    • 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
    • F16K1/04—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 with a cut-off member rigid with the spindle, e.g. main valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • 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
    • F16K1/48—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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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

  • the present application relates to the technical field of flow regulating valves, in particular, to a valve needle component and a flow regulating valve.
  • the bearing is usually installed into the screw rod first, and then the flange hole is set in the screw rod, and the bearing is axially fixed by the flange. limit.
  • the bearing is limited by the flanging structure on the screw. During the flanging process, the force on the flanging hole becomes larger, which easily leads to a larger force on the inner ring of the bearing, so that the inner cage of the bearing is deformed, and the bearing is locked when it rotates. The friction force increases during rotation, affecting valve opening performance and product life.
  • the present application provides a valve needle part and a flow regulating valve to solve the problem in the prior art that the inner ring of the bearing in the valve needle part bears a large force.
  • a valve needle component including: a screw, the screw includes a first rod segment, a second rod segment and a third rod segment connected in sequence, and the outer portion of the first rod segment The diameter is greater than the outer diameter of the second rod segment, and the outer diameter of the second rod segment is larger than the outer diameter of the third rod segment; the bearing is sleeved on the second rod segment; the bush is sleeved on the third rod segment, and the bushing is sleeved on the third rod segment.
  • the sleeve is welded to the third rod section, and the two end faces of the inner ring of the bearing abut against the end face of the first rod segment and the end face of the bushing respectively.
  • the length of the second rod section is M
  • the length of the inner ring is N
  • M ⁇ N is M
  • the inner diameter of the bushing is larger than the outer diameter of the third rod section, or the inner diameter of the bushing is equal to the outer diameter of the third rod section, or the inner diameter of the bushing is smaller than the outer diameter of the third rod section.
  • both the outer diameter of the bushing and the outer diameter of the first rod section are smaller than the inner diameter of the outer ring of the bearing.
  • valve needle part further includes: a valve head, the valve head has an assembly cavity, and the bearing is located in the assembly cavity.
  • valve needle component also includes: a limit seat, which is arranged in the assembly cavity, and the bush and the third rod section are both located in the cavity of the limit seat, and the limit seat and the outer ring of the bearing abut; the elastic member is arranged In the assembly cavity, one end of the elastic piece abuts against the limit seat, and the other end of the elastic piece abuts against the bottom wall of the assembly cavity.
  • the limit seat includes a limit sleeve and a limit boss arranged at one end of the limit sleeve, the bearing and the third rod segment are located in the limit sleeve, the limit sleeve and the outer ring abut, and the elastic member is a spring.
  • the limiting boss penetrates into the elastic member.
  • a flow regulating valve is provided, and the flow regulating valve includes the above-mentioned valve needle component.
  • the screw rod of the valve needle part also includes a fourth rod segment, the fourth rod segment is connected with the first rod segment, the fourth rod segment has an external thread, and the flow regulating valve also includes a nut structure, the nut structure has an internal thread, and the internal thread Compatible with external thread.
  • the flow regulating valve is an electronic expansion valve.
  • a valve needle component including: a screw rod, the screw rod includes a first rod segment, a second rod segment and a third rod segment connected in sequence, and the outer diameter of the first rod segment is larger than that of the second rod
  • the outer diameter of the segment, the outer diameter of the second rod segment is greater than the outer diameter of the third rod segment;
  • the bearing is sleeved on the second rod segment;
  • the bush is sleeved on the third rod segment, and the bushing and the third rod segment welding, the two end faces of the inner ring of the bearing abut against the end face of the first rod segment and the end face of the bushing respectively.
  • the outer diameters of the upper rod sections of the screw rod from large to small are the first rod section, the second rod section and the third rod section.
  • the second rod section is the bearing installation section, which is in clearance, transition or interference fit with the inner ring of the bearing.
  • the installation section is in clearance, transition or interference fit with the inner hole of the bushing.
  • One end of the bushing is against the inner ring of the bearing.
  • the bushing is fixed with the screw through welding to limit the axial direction of the inner ring of the bearing.
  • This structure avoids It solves the problem that when the bearing is installed on the valve needle part of the existing flow regulating valve, the internal cage of the bearing is deformed due to the large force on the inner ring of the bearing, and the problem of pinning when the bearing rotates, reduces the friction force when the bearing rotates, and improves product performance.
  • FIG. 1 shows a schematic structural view of a valve needle component provided by an embodiment of the present application
  • Fig. 2 shows a schematic diagram of part of the structure of the valve needle part in Fig. 1;
  • Fig. 3 shows a schematic diagram of the pressure sleeve in Fig. 1 .
  • the embodiment of the present application provides a valve needle component, including: a screw 10, the screw 10 includes a first rod segment 11, a second rod segment 12 and a third rod segment 13 connected in sequence , the outer diameter of the first rod segment 11 is larger than the outer diameter of the second rod segment 12, the outer diameter of the second rod segment 12 is larger than the outer diameter of the third rod segment 13; the bearing 20 is sleeved on the second rod segment 12; The bushing 30 is sleeved on the third rod section 13, and the bushing 30 is welded to the third rod section 13.
  • the two end faces of the inner ring of the bearing 20 are respectively against the end face of the first rod segment 11 and the end face of the bushing 30. catch.
  • the bearing 20 includes an inner ring, an outer ring, steel balls and a cage arranged between the inner ring and the outer ring.
  • the bearing 20 and the bushing 30 are arranged on the rod section of the screw 10, and the outer diameters of the upper rod sections of the screw 10 from large to small are: the first rod section 11, the second rod section 12 and the third rod Segment 13, the second rod segment 12 is the installation segment of the bearing 20, which is in clearance, transition or interference fit with the inner ring of the bearing 20, the bearing 20 is sleeved on the second rod segment 12, and one end of the inner ring of the bearing 20 is connected to the first rod segment 11 abuts against the stepped surface formed by the second rod segment 12 .
  • the third rod section 13 is the installation section of the bushing 30, which is in clearance, transition or interference fit with the inner hole of the bushing 30.
  • the bushing 30 is sleeved on the third rod section 13.
  • the other end of the bearing 20 is abutted against, and then the bearing 20 is limited by welding the bushing 30 and the third rod section 13 .
  • This structure avoids the problem of deformation of the internal cage of the bearing 20 and pinning of the bearing 20 when the bearing 20 rotates due to the large force on the inner ring of the bearing 20 caused by the flanging method in the prior art, and reduces the friction force of the bearing 20 when it rotates , improved product performance.
  • the length of the second rod section 12 is M, and the length of the inner ring is N, where M ⁇ N.
  • the length of the inner ring of the bearing 20 is greater than that of the second rod section 12, which ensures that one end of the inner ring of the bearing 20 abuts against the stepped surface formed by the first rod section 11 and the second rod section 12, and the other end slightly protrudes from the second rod section 12 , to ensure the abutment with the bushing 30, so that the inner ring of the bearing 20 is limited in two directions, thereby improving the assembly accuracy and avoiding the poor flow consistency of the flow regulating valve caused by the axial shaking of the bearing 20.
  • the length of the second rod section 12 should not be too short, so as to ensure that the bearing 20 can be stably sleeved on the second rod section 12, so as to avoid damage to the second rod section 12, the bearing 20 and the third rod section 13 when the valve needle parts are working. cause unnecessary damage.
  • the length of the second rod segment 12 is less than the length of the inner ring of the bearing 20 and not less than 1/2 of the length of the inner ring of the bearing, that is, N>M ⁇ N/2, to ensure that the bush 30 and the bearing 20 are in normal contact ,
  • the bearing 20 is limited by the stepped surface and the bushing 30 at both ends of the bearing 20, preventing the axial movement of the bearing 20 on the screw 10, improving the valve opening performance, product life and flow consistency of the product.
  • the inner diameter of the bushing 30 is greater than the outer diameter of the third rod segment 13, or the inner diameter of the bushing 30 is equal to the outer diameter of the third rod segment 13, or the inner diameter of the bushing 30 is smaller than the outer diameter of the third rod segment 13 . According to the actual situation, the relationship between the inner diameter of the bushing 30 and the outer diameter of the third rod section 13 can be adjusted to facilitate adjustment and assembly.
  • both the outer diameter of the bushing 30 and the outer diameter of the first rod section 11 are smaller than the inner diameter of the outer ring of the bearing 20 . Moreover, the outer diameter of the bushing 30 and the outer diameter of the first rod section 11 are larger than 1/2 of the outer diameter of the inner ring of the bearing 20 . In this way, interference between the bush 30, the first rod section 11 and the outer ring can be avoided.
  • the valve needle component further includes: a valve head 40 , the valve head 40 has an assembly cavity 41 , and the bearing 20 is located in the assembly cavity 41 .
  • the valve head 40 is provided with an assembly cavity 41 , and the movement of the valve head 40 is controlled by other valve needle components assembled in the assembly cavity 41 , the structure is simple, and the occupied space is small.
  • the valve needle part also includes: a limit seat 50, which is arranged in the assembly cavity 41, the bush 30 and the third rod segment 13 are located in the cavity of the limit seat 50, the limit seat 50 and the outer ring of the bearing 20 Abutting: the elastic piece 60 is disposed in the assembly cavity 41 , one end of the elastic piece 60 abuts against the limit seat 50 , and the other end of the elastic piece 60 abuts against the bottom wall of the assembly cavity 41 .
  • the outer ring of the bearing 20 can be axially limited by the limit seat 50 .
  • the bushing 30 and the third rod section 13 are located in the cavity of the limiting seat 50, the limiting seat 50 is arranged in the assembly cavity 41, and the elastic member 60 is also arranged in the assembly cavity 41, as can be seen from the above , in Fig. 1, the internal components of the assembly cavity 41 are, from bottom to top, the elastic member 60, the limit seat 50, the third rod segment 13, the bushing 30 sleeved on the third rod segment 13, and the bushing 30 The abutting bearing 20 and the second rod segment 12 sleeved by the bearing 20 .
  • the other structures of the valve needle parts are arranged in the assembly cavity 41 of the valve head 40, which reduces the use of the overall space. At the same time, the assembly cavity 41 can also limit and guide other parts in the axial direction. effect.
  • the limit seat 50 includes a limit sleeve 51 and a limit boss 52 arranged at one end of the limit sleeve 51, the bearing 20 and the third rod segment 13 are located in the limit sleeve 51, the limit sleeve 51 and the outer ring
  • the elastic member 60 is a spring, and the limiting boss 52 penetrates into the elastic member 60 .
  • the limit sleeve 51 is an annular columnar structure, one end of the annular column abuts on the outer ring of the bearing 20, and a protruding limit boss 52 is connected to the center of the other end, the limit boss 52 is A cylindrical structure, one end of the cylindrical surface is connected with the limiting sleeve 51 , and the other end is penetrated into the elastic member 60 for setting.
  • one end of the elastic member 60 abuts against the limit seat 50 , which can also be understood as one end of the elastic member 60 abuts against the limit sleeve 51 .
  • the position-limiting boss 52 arranged in the elastic member 60 plays a certain position-limiting and guiding role, ensuring the smooth movement of the position-limiting seat 50 abutting against the elastic member 60, thereby ensuring that The abutting bearing 20 is also able to move smoothly.
  • both the bearing 20 and the third rod segment 13 are arranged in the limiting sleeve 51, which can avoid structural interference and improve the compactness of the valve needle component.
  • the screw 10, the bearing 20 and the bushing 30 form a screw assembly
  • the valve head 40 has a sealing end 42 for sealing the valve port
  • the valve needle part also includes: a pressure sleeve 70, which is arranged on the valve The end of the head 40 away from the sealing end 42 ; the end of the compression sleeve 70 close to the sealing end 42 abuts against the screw assembly, so that the screw assembly is limited by the compression sleeve 70 .
  • the screw rod 10 is arranged in the assembly cavity 41, the screw rod 10 is movably arranged relative to the valve head 40, and the pressure sleeve 70 is arranged on the end of the valve head 40 away from the sealing end 42, and the valve head 40 is away from the sealing end.
  • One end of 42 fixes the bearing 20.
  • the bearing 20 cooperates with the pressure sleeve 70 to drive the valve head 40 to move, and the sealing end 42 is not provided with a press-fit structure, which greatly reduces the sealing position of the pressure sleeve 70 at the bottom of the valve head (that is, the sealing end 42).
  • the sealing effect and flow consistency are improved, and the problem of the leakage risk of the valve head in the prior art is solved when the valve head is blocked.
  • the pressure sleeve 70 has a ring structure; the pressure sleeve 70 is interference fit or welded with the valve head 40 .
  • the assembly cavity 41 includes a first cavity section 411 and a second cavity section 412; along the extending direction of the valve head 40, the second cavity section 412
  • the cross-sectional area of the first cavity section 411 is greater than that of the first cavity section 411 to form a stepped surface 413 between the first cavity section 411 and the second cavity section 412, and the pressure sleeve 70 abuts against the stepped surface 413.
  • the pressure sleeve 70 has a receiving passage 71 inside.
  • the cross-sectional area of the receiving passage 71 is smaller than the cross-sectional area of the first cavity segment 411, so that the pressure sleeve 70 and the first A limiting surface for abutting against the screw assembly is formed between the cavity segments 411 .
  • the screw assembly can be stably limited.
  • the limit surface of the pressure sleeve 70 can be set to abut against the outer ring of the bearing 20 away from the bushing 30, or a stepped surface is provided on the screw 10, and the limit surface of the pressure sleeve 70 is in contact with the outer ring of the screw 10. Both of these two methods can realize the axial limit of the screw assembly.
  • the assembly cavity 41 includes a third cavity segment 414 , and the elastic member 60 is inserted in the third cavity segment 414 . In this way, the installation of the elastic member 60 is more firm.
  • the valve head 40 has a sealing end 42 for blocking the valve port.
  • the assembly cavity 41 also includes a transition section 415.
  • the transition section 415 is arranged on the side of the third cavity section 414 away from the sealing end 42 and is close to the sealing end along the valve head 40. 42, the cross-sectional area of the transition section 415 gradually decreases. Adopting this structure provides a cushioning effect for the collision between the screw rod 10 and the valve head 40 during operation.
  • a flow regulating valve is provided, and the flow regulating valve includes the above-mentioned valve needle component.
  • the screw rod 10 of the valve needle part also includes a fourth rod segment 14, the fourth rod segment 14 is connected to the first rod segment 11, the fourth rod segment 14 has an external thread, and the flow regulating valve also includes a nut structure,
  • the nut structure has an internal thread, and the internal thread and the external thread cooperate.
  • the nut structure does not rotate in the circumferential direction.
  • the flow regulating valve is an electronic expansion valve.
  • the screw 10 includes a first rod segment 11, a second rod segment 12 and a third rod segment 13 connected in sequence, and the outer diameters of the rod segments on the screw rod 10 are the first rod segment 11, the third rod segment in descending order.
  • Two rod segments 12 and a third rod segment 13 are the second rod section 12 and a third rod segment 13 .
  • the second rod section 12 is the installation section of the bearing 20, which is in clearance, transition or interference fit with the inner ring of the bearing 20, and the inner ring is against the step formed between the first rod section 11 and the second rod section 12, and the third
  • the rod section 13 is the installation section of the bushing 30, which fits with the gap, transition or interference of the inner hole of the bushing 30.
  • the bushing 30 can be fixed with the screw 10 by welding. This structure It avoids the problem that when the bearing 20 is installed on the valve needle part of the existing electronic expansion valve, the internal cage of the bearing 20 is deformed due to the large force on the inner ring of the bearing 20, and the problem that the bearing 20 is stuck when the bearing 20 rotates, and the friction force when the bearing 20 rotates is reduced , to improve product performance.

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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)

Abstract

本申请提供了一种阀针部件及流量调节阀，阀针部件包括：螺杆，螺杆包括依次连接的第一杆段、第二杆段和第三杆段，第一杆段的外径大于第二杆段的外径，第二杆段的外径大于第三杆段的外径；轴承，套设在第二杆段上；衬套，套设在第三杆段上，衬套和第三杆段焊接，轴承的内圈的两个端面分别和第一杆段的端面、衬套的端面抵接。通过本申请提供的技术方案，避免了现有技术中阀针部件安装轴承时，因轴承内圈受力较大导致轴承内部保持架发生变形、轴承转动时发卡的问题，降低轴承旋转时的摩擦力，改善产品性能。

Description

阀针部件及流量调节阀 技术领域
本申请涉及流量调节阀技术领域，具体而言，涉及一种阀针部件及流量调节阀。
背景技术
目前，对于现有技术中的阀针部件及流量调节阀，如电子膨胀阀，通常都采用先将轴承装入螺杆，再通过螺杆内设翻边孔的方法，由翻边对轴承进行轴向限位。
通过螺杆上的翻边结构对轴承进行限位，翻边过程中翻边孔受力变大，容易导致轴承内圈受力变大，从而使得轴承内部保持架发生变形、轴承转动时发卡，轴承旋转时摩擦力增加、影响开阀性能及产品寿命。
申请内容
本申请提供了一种阀针部件及流量调节阀，以解决现有技术中阀针部件内的轴承内圈受力较大的问题。
为了解决上述问题，根据本申请的一个方面，提供了一种阀针部件，包括：螺杆，螺杆包括依次连接的第一杆段、第二杆段和第三杆段，第一杆段的外径大于第二杆段的外径，第二杆段的外径大于第三杆段的外径；轴承，套设在第二杆段上；衬套，套设在第三杆段上，衬套和第三杆段焊接，轴承的内圈的两个端面分别和第一杆段的端面、衬套的端面抵接。
进一步地，在螺杆的轴向上，第二杆段的长度为M，内圈的长度为N，M＜N。
进一步地，M≥N/2。
进一步地，衬套的内径大于第三杆段的外径，或衬套的内径等于第三杆段的外径，或衬套的内径小于第三杆段的外径。
进一步地，衬套的外径、第一杆段的外径均小于轴承的外圈的内径。
进一步地，阀针部件还包括：阀头，阀头具有装配腔，轴承位于装配腔内。
进一步地，阀针部件还包括：限位座，设置在装配腔内，衬套和第三杆段均位于限位座的腔体内，限位座和轴承的外圈抵接；弹性件，设置在装配腔内，弹性件的一端和限位座抵接，弹性件的另一端和装配腔的底壁抵接。
进一步地，限位座包括限位套和设置在限位套一端的限位凸台，轴承和第三杆段均位于限位套内，限位套和外圈抵接，弹性件为弹簧，限位凸台穿入弹性件内。
根据本申请的另一方面，提供了一种流量调节阀，流量调节阀包括上述的阀针部件。
进一步地，阀针部件的螺杆还包括第四杆段，第四杆段和第一杆段连接，第四杆段具有外螺纹，流量调节阀还包括螺母结构，螺母结构具有内螺纹，内螺纹和外螺纹配合。
进一步地，流量调节阀为电子膨胀阀。
应用本申请的技术方案，提供了一种阀针部件，包括：螺杆，螺杆包括依次连接的第一杆段、第二杆段和第三杆段，第一杆段的外径大于第二杆段的外径，第二杆段的外径大于第三杆段的外径；轴承，套设在第二杆段上；衬套，套设在第三杆段上，衬套和第三杆段焊接，轴承的内圈的两个端面分别和第一杆段的端面、衬套的端面抵接。采用该方案，螺杆上杆段的外径从大到小依次为第一杆段、第二杆段和第三杆段。其中，第二杆段为轴承安装段，与轴承内圈间隙、过渡或过盈配合，内圈抵在第一杆段与第二杆段之间形成的台阶上，第三杆段为衬套安装段，与衬套内孔间隙、过渡或过盈配合，衬套一端抵在轴承内圈，衬套通过焊接与螺杆固定成一体，从而对轴承内圈的轴向进行限位，该结构避免了现有流量调节阀中阀针部件安装轴承时，因轴承内圈受力较大导致轴承内部保持架发生变形、轴承转动时发卡的问题，降低轴承旋转时的摩擦力，改善产品性能。
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示出了本申请的实施例提供的阀针部件的结构示意图；
图2示出了图1中阀针部件中部分结构的示意图；
图3示出了图1中压套的示意图。
其中，上述附图包括以下附图标记：
10、螺杆；11、第一杆段；12、第二杆段；13、第三杆段；14、第四杆段；20、轴承；30、衬套；40、阀头；41、装配腔；411、第一腔体段；412、第二腔体段；413、台阶面；414、第三腔体段；415、过渡段；42、密封端；50、限位座；51、限位套；52、限位凸台；60、弹性件；70、压套；71、容纳通道。
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3所示，本申请的实施例提供了一种阀针部件，包括：螺杆10，螺杆10包括依次连接的第一杆段11、第二杆段12和第三杆段13，第一杆段11的外径大于第二杆段12的外径，第二杆段12的外径大于第三杆段13的外径；轴承20，套设在第二杆段12上；衬套30，套设在第三杆段13上，衬套30和第三杆段13焊接，轴承20的内圈的两个端面分别和第一杆段11的端面、衬套30的端面抵接。具体地，轴承20包括内圈、外圈以及设置在内圈和外圈之间的钢珠以及保持架。
在本实施例中，轴承20和衬套30设置在螺杆10的杆段上，螺杆10上杆段外径从大到小依次为：第一杆段11、第二杆段12和第三杆段13，第二杆段12为轴承20安装段，与轴承20内圈间隙、过渡或过盈配合，轴承20套设在第二杆段12上，轴承20内圈的一端与第一杆段11与第二杆段12形成的台阶面抵接。第三杆段13为衬套30安装段，与衬套30内孔间隙、过渡或过盈配合，衬套30套设在第三杆段13上，衬套30的一端面与轴承20内圈的另一端抵接，再通过将衬套30与第三杆段13焊接，从而对轴承20进行限位。该结构避免了因现有技术中采用翻边的方式，使轴承20内圈受力较大导致轴承20内部保持架发生变形、轴承20转动时发卡的问题，降低了轴承20旋转时的摩擦力，改善了产品性能。
如图2所示，在螺杆10的轴向上，第二杆段12的长度为M，内圈的长度为N，M＜N。轴承20内圈的长度大于第二杆段12，保证了轴承20内圈一端与第一杆段11和第二杆段12形成的台阶面抵接，另一端略凸出于第二杆段12，保证了与衬套30抵接，这样轴承20的内圈在两个方向都被限定，从而提高了装配精度，避免了因轴承20轴向晃动导致的流量调节阀流量一致性差。
具体地，M≥N/2。即第二杆段12的长度也不宜过短，保证轴承20能稳定的套设在第二杆段12上，避免阀针部件工作时对第二杆段12、轴承20和第三杆段13造成不必要的损害。
在本实施例中，第二杆段12长度小于轴承20内圈长度且不小于轴承内圈长度的1/2，即，N＞M≥N/2，保证衬套30与轴承20正常抵接，通过轴承20两端分别抵接的台阶面和衬套30来对轴承20进行限位，防止轴承20在螺杆10上发生轴向移动，提高了产品开阀性能和产品寿命以及流量一致性。
可选地，衬套30的内径大于第三杆段13的外径，或衬套30的内径等于第三杆段13的外径，或衬套30的内径小于第三杆段13的外径。根据实际情况可对衬套30的内径和第三杆段13的外径之间的关系进行调整，便于调节和装配。
进一步地，衬套30的外径、第一杆段11的外径均小于轴承20的外圈的内径。且衬套30的外径、第一杆段11的外径均大于轴承20的内圈外径的1/2。这样可避免衬套30、第一杆段11和外圈干涉。
如图1所示，阀针部件还包括：阀头40，阀头40具有装配腔41，轴承20位于装配腔41内。阀头40设置有装配腔41，并通过装配在装配腔41中的其他阀针部件来控制阀头40的移动，结构简单，占用空间小。
具体地，阀针部件还包括：限位座50，设置在装配腔41内，衬套30和第三杆段13均位于限位座50的腔体内，限位座50和轴承20的外圈抵接；弹性件60，设置在装配腔41内，弹性件60的一端和限位座50抵接，弹性件60的另一端和装配腔41的底壁抵接。通过限位座50可对轴承20的外圈在轴向进行限位。
在本实施例中，衬套30和第三杆段13位于限位座50的腔体内，限位座50设置在装配腔41内，弹性件60也设置在装配腔41内，由上述内容可知，在图1中，装配腔41内部件从下至上依次为，弹性件60、限位座50、第三杆段13、套设在第三杆段13上的衬套30、与衬套30抵接的轴承20以及轴承20套设的第二杆段12。将阀针部件的其他结构设置在阀头40的装配腔41中，减小了整体空间的使用，同时，装配腔41也能对其他零部件在轴向方向上起到一定的限位和导向作用。
进一步地，限位座50包括限位套51和设置在限位套51一端的限位凸台52，轴承20和第三杆段13均位于限位套51内，限位套51和外圈抵接，弹性件60为弹簧，限位凸台52穿入弹性件60内。
其中，限位套51为一环形柱状结构，环形柱状的一端，抵接在轴承20的外圈上，另外一端的中心处，连接有一凸出的限位凸台52，限位凸台52为一圆柱状结构，圆柱面的一端与限位套51相连，另一端穿入弹性件60设置。可选地，弹性件60的一端与限位座50抵接，也可以理解为弹性件60的一端与限位套51抵接。采用该实施例，设置在弹性件60内的限位凸台52起到一定的限位和导向作用，保证与弹性件60抵接的限位座50的平稳移动，从而保证与限位座50抵接的轴承20也能够平稳移动。并且，将轴承20和第三杆段13均设置在限位套51内，可避免结构干涉，提高阀针部件的紧凑性。
在本实施例中，螺杆10、轴承20和衬套30组成螺杆组件，阀头40具有用于封堵阀口的密封端42，阀针部件还包括：压套70，压套70设置在阀头40远离密封端42的一端；压套70靠近密封端42的一端与螺杆组件抵接，以通过压套70将螺杆组件限位。
采用上述设置，螺杆10的至少部分设置在装配腔41内，螺杆10相对于阀头40可移动地设置，压套70设置在阀头40远离密封端42的一端，从阀头40远离密封端42的一端将轴承20固定。这样，轴承20与压套70限位配合，以带动阀头40运动，密封端42没有设置压装的结构，大大减小了压套70装配时对阀头底部密封位置(即密封端42)的影响，提高了密封效果及流量一致性，解决了现有技术中的阀头在进行封堵时存在泄露的风险的问题。
为了使得压套70的安装更加容易，在本实施例中，压套70为环形结构；压套70与阀头40过盈配合或焊接。
为了实现压套70的安装，在本实施例的阀针部件中，装配腔41包括第一腔体段411和第二腔体段412；沿阀头40的延伸方向，第二腔体段412的横截面积大于第一腔体段411的横截面积，以在第一腔体段411和第二腔体段412之间形成台阶面413，压套70与台阶面413抵接。
在本实施例中，压套70内具有容纳通道71，沿阀头40的延伸方向，容纳通道71的横截面积小于第一腔体段411的横截面积，以在压套70和第一腔体段411之间形成用于与螺杆组件抵接的限位面。这样能够稳定地将螺杆组件进行限位。具体地，压套70的限位面可设置为与轴承20背离衬套30的一侧的外圈抵接，或者在螺杆10上设置阶梯面，压套70的限位面与螺杆10上的阶梯面抵接，这两种方式都可以实现对螺杆组件的轴向限位。
其中，装配腔41包括第三腔体段414，弹性件60插设在第三腔体段414内。这样，使得弹性件60的安装更加的牢固。
阀头40具有用于封堵阀口的密封端42，装配腔41还包括过渡段415，过渡段415设置在第三腔体段414远离密封端42的一侧，沿阀头40靠近密封端42的方向，过渡段415的横截面积逐渐缩小。采用这种结构，为螺杆10与阀头40在工作时发生碰撞提供缓冲作用。
根据本申请的另一实施例，提供了一种流量调节阀，流量调节阀包括上述的阀针部件。
如图2所示，阀针部件的螺杆10还包括第四杆段14，第四杆段14和第一杆段11连接，第四杆段14具有外螺纹，流量调节阀还包括螺母结构，螺母结构具有内螺纹，内螺纹和外螺纹配合。通过第四杆段14上的外螺纹与螺母结构的内螺纹配合，将阀针部件与流量调节阀的其他部分连接到一起。螺母结构周向不会转动，当螺杆10在转动时，在螺纹的配合引导下，螺杆10轴向移动，进而带动阀头40移动，从而实现阀口的开闭。通过设置弹性件60可起到对阀头40缓冲保护、实现阀头40与阀口密封等作用。
具体地，流量调节阀为电子膨胀阀。采用该实施例，螺杆10包括依次连接的第一杆段11、第二杆段12和第三杆段13，螺杆10上杆段的外径从大到小依次为第一杆段11、第二杆段12和第三杆段13。其中，第二杆段12为轴承20安装段，与轴承20内圈间隙、过渡或过盈配合，内圈抵在第一杆段11与第二杆段12之间形成的台阶上，第三杆段13为衬套30安装段，与衬套30内孔间隙、过渡或过盈配合，衬套30一端抵在轴承20内圈，衬套30可通过焊接与螺杆10固定成一体，该结构避免了现有电子膨胀阀中阀针部件安装轴承20时，因轴承20内圈受力较大导致轴承20内部保持架发生变形、轴承20转动时发卡的问题，降低轴承20旋转时的摩擦力，改善产品性能。
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 (16)

  1. 一种阀针部件，其特征在于，包括：
    螺杆(10)，所述螺杆(10)包括依次连接的第一杆段(11)、第二杆段(12)和第三杆段(13)，所述第一杆段(11)的外径大于所述第二杆段(12)的外径，所述第二杆段(12)的外径大于所述第三杆段(13)的外径；
    轴承(20)，套设在所述第二杆段(12)上；
    衬套(30)，套设在所述第三杆段(13)上，所述衬套(30)和所述第三杆段(13)焊接，所述轴承(20)的内圈的两个端面分别和所述第一杆段(11)的端面、所述衬套(30)的端面抵接。
  2. 根据权利要求1所述的阀针部件，其特征在于，在所述螺杆(10)的轴向上，所述第二杆段(12)的长度为M，所述内圈的长度为N，M＜N。
  3. 根据权利要求2所述的阀针部件，其特征在于，M≥N/2。
  4. 根据权利要求1所述的阀针部件，其特征在于，所述衬套(30)的内径大于所述第三杆段(13)的外径，或所述衬套(30)的内径等于所述第三杆段(13)的外径，或所述衬套(30)的内径小于所述第三杆段(13)的外径。
  5. 根据权利要求1所述的阀针部件，其特征在于，所述衬套(30)的外径、所述第一杆段(11)的外径均小于所述轴承(20)的外圈的内径。
  6. 根据权利要求1所述的阀针部件，其特征在于，所述阀针部件还包括：
    阀头(40)，所述阀头(40)具有装配腔(41)，所述轴承(20)位于所述装配腔(41)内。
  7. 根据权利要求6所述的阀针部件，其特征在于，所述阀针部件还包括：
    限位座(50)，设置在所述装配腔(41)内，所述衬套(30)和所述第三杆段(13)均位于所述限位座(50)的腔体内，所述限位座(50)和所述轴承(20)的外圈抵接；
    弹性件(60)，设置在所述装配腔(41)内，所述弹性件(60)的一端和所述限位座(50)抵接，所述弹性件(60)的另一端和所述装配腔(41)的底壁抵接。
  8. 根据权利要求7所述的阀针部件，其特征在于，所述限位座(50)包括限位套(51)和设置在所述限位套(51)一端的限位凸台(52)，所述轴承(20)和所述第三杆段(13)均位于所述限位套(51)内，所述限位套(51)和所述外圈抵接，所述弹性件(60)为弹簧，所述限位凸台(52)穿入所述弹性件(60)内。
  9. 根据权利要求6所述的阀针部件，其特征在于，所述螺杆(10)、所述轴承(20)和所述衬套(30)组成螺杆组件，所述阀头(40)具有用于封堵阀口的密封端(42)，所述阀针部件还包括：
    压套(70)，所述压套(70)设置在所述阀头(40)远离所述密封端(42)的一端；所述压套(70)靠近所述密封端(42)的一端与所述螺杆组件抵接，以通过所述压套(70)将所述螺杆组件限位。
  10. 根据权利要求9所述的阀针部件，其特征在于，所述压套(70)为环形结构；所述压套(70)与所述阀头(40)过盈配合或焊接。
  11. 根据权利要求9所述的阀针部件，其特征在于，所述装配腔(41)包括第一腔体段(411)和第二腔体段(412)；沿所述阀头(40)的延伸方向，所述第二腔体段(412)的横截面积大于所述第一腔体段(411)的横截面积，以在所述第一腔体段(411)和所述第二腔体段(412)之间形成台阶面(413)，所述压套(70)与所述台阶面(413)抵接。
  12. 根据权利要求11所述的阀针部件，其特征在于，所述压套(70)内具有容纳通道(71)，沿所述阀头(40)的延伸方向，所述容纳通道(71)的横截面积小于所述第一腔体段(411)的横截面积，以在所述压套(70)和所述第一腔体段(411)之间形成用于与所述螺杆组件抵接的限位面。
  13. 根据权利要求7所述的阀针部件，其特征在于，所述装配腔(41)包括第三腔体段(414)，所述弹性件(60)插设在所述第三腔体段(414)内。
  14. 根据权利要求13所述的阀针部件，其特征在于，所述阀头(40)具有用于封堵阀口的密封端(42)，所述装配腔(41)还包括过渡段(415)，所述过渡段(415)设置在所述第三腔体段(414)远离所述密封端(42)的一侧，沿所述阀头(40)靠近所述密封端(42)的方向，所述过渡段(415)的横截面积逐渐缩小。
  15. 一种流量调节阀，其特征在于，所述流量调节阀包括权利要求1至14中任一项所述的阀针部件。
  16. 根据权利要求15所述的流量调节阀，其特征在于，所述阀针部件的螺杆(10)还包括第四杆段(14)，所述第四杆段(14)和所述第一杆段(11)连接，所述第四杆段(14)具有外螺纹，所述流量调节阀还包括螺母结构，所述螺母结构具有内螺纹，所述内螺纹和所述外螺纹配合。
PCT/CN2022/124930 2021-10-20 2022-10-12 阀针部件及流量调节阀 WO2023066116A1 (zh)

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