WO2020132967A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2020132967A1
WO2020132967A1 PCT/CN2018/123995 CN2018123995W WO2020132967A1 WO 2020132967 A1 WO2020132967 A1 WO 2020132967A1 CN 2018123995 W CN2018123995 W CN 2018123995W WO 2020132967 A1 WO2020132967 A1 WO 2020132967A1
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WO
WIPO (PCT)
Prior art keywords
valve
screw
electronic expansion
expansion valve
sleeve
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Application number
PCT/CN2018/123995
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English (en)
French (fr)
Inventor
刘乐强
许学飞
贺宇辰
Original Assignee
浙江盾安禾田金属有限公司
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 浙江盾安禾田金属有限公司 filed Critical 浙江盾安禾田金属有限公司
Priority to PCT/CN2018/123995 priority Critical patent/WO2020132967A1/zh
Priority to JP2021526755A priority patent/JP7232907B2/ja
Priority to KR1020217020473A priority patent/KR102502517B1/ko
Publication of WO2020132967A1 publication Critical patent/WO2020132967A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to the technical field of electronic expansion valves, in particular, to an electronic expansion valve.
  • the electronic expansion valve is usually composed of a rotor, a screw, a fixed seat, and a valve needle assembly.
  • the screw and the rotor are connected, and the valve needle assembly is connected to the screw.
  • the electronic expansion valve drives the screw to move axially through the rotor, and then drives the valve needle assembly to move axially to achieve the purpose of blocking and opening the valve port.
  • the electronic expansion valve has the problems of complicated structure and high noise.
  • the invention provides an electronic expansion valve to solve the problems of complicated structure and large noise in the prior art.
  • the invention provides an electronic expansion valve.
  • the electronic expansion valve includes: a valve body; a rotor, which is rotatably arranged in the valve body; a fixed seat, which is fixedly arranged in the valve body; and a bearing, which is arranged between the rotor and the fixed seat, the bearing One of the inner ring and the outer ring is connected to the rotor, and the other is connected to the fixed seat.
  • the electronic expansion valve further includes: a screw, which is arranged in the valve body, and one end of the screw is sequentially penetrated with a fixed seat and a bearing and threadedly connected with the rotor.
  • the rotor is used to drive the screw to move in the axial direction.
  • the rotor includes: a magnet, which is sleeved on the outer side of the screw; a connecting plate, which is arranged on the magnet, the screw penetrates the connecting plate, and is screwed with the connecting plate, the connecting plate and the fixing seat are located on both sides of the bearing, One of the inner and outer rings of the bearing is connected to the connecting plate, and the other is connected to the fixed seat.
  • the electronic expansion valve further includes a first limiting structure, which is arranged between the screw and the fixed seat, and the first limiting structure is used to limit the displacement and rotation of the screw relative to the fixed seat.
  • the first limit structure includes: a stopper piece, which is fixedly arranged on the screw rod, and the stopper piece has an extension end, and an extension direction of the extension end has an angle with the axial direction of the screw rod; a guide limit groove, which is provided on the fixed seat On the side wall, the extension direction of the guide limit groove is the same as the axis direction of the screw, and the extended end of the stop piece is located in the guide limit groove.
  • the guide limit groove and the stop piece cooperate to limit the displacement and rotation of the screw relative to the fixed seat .
  • the first limiting structure includes: a first boss, which is arranged on the side wall of the screw; a second boss, which is arranged on the inner wall of the fixing seat, the first boss and the second boss cooperate to restrict the screw from facing The displacement of the fixed seat.
  • valve body includes: a sleeve; a valve seat, a rotor, a fixed seat, a bearing, and a screw are provided between the sleeve and the valve seat.
  • valve seat has a valve cavity and a mounting hole communicating with the valve cavity
  • electronic expansion valve further includes: a valve needle assembly movably disposed in the mounting hole, the screw is connected with the valve needle assembly, and the valve needle assembly has a closed valve port The first position and the second position to open the valve port.
  • valve body further includes a sleeve, which is sleeved on the outer side of the valve needle assembly, and the sleeve is fixedly arranged in the installation hole, and the end of the fixing seat away from the bearing is connected to the end surface of the sleeve.
  • valve needle assembly includes: a valve sleeve movably disposed in the mounting hole, one end of the screw is connected to the valve sleeve; a valve needle, one end of the valve needle is movably disposed in the valve sleeve; a pre-tension spring is disposed at Inside the valve sleeve, and between the valve sleeve and the valve needle, the pretension spring is used to provide a pretension to the valve needle.
  • valve needle assembly further includes: a second limit structure, which is disposed between the valve needle and the screw, and the second limit structure is used to limit the relative displacement of the valve needle and the screw.
  • the end of the valve needle located in the valve sleeve is provided with a first limiting hole
  • the second limiting structure includes: a sphere, which is arranged in the valve sleeve, and the sphere is partially arranged in the first limiting hole; Piece, arranged between the sphere and the screw, the gasket is provided with a second limit hole, the sphere is partially arranged in the second limit hole, one end of the pretension spring is connected to the valve sleeve, and the other end of the pretension spring is connected to the pad ⁇ Piece connection.
  • the side of the connecting plate facing the bearing is provided with an annular convex edge, and the annular convex edge is sleeved on the outer side of the bearing.
  • the fixing seat has a through hole
  • the cross section of the through hole is a non-circular structure
  • the screw has a threaded section and a limit section
  • the screw section of the screw is connected with the rotor thread
  • the cross section of the limit section is suitable for the cross section of the through hole With to limit the rotation of the screw relative to the fixed seat.
  • the electronic expansion valve includes a valve body, a rotor, a fixed seat and a bearing.
  • the rotor is rotatably arranged in the valve body, the fixed seat is fixedly arranged in the valve body, and one of the inner ring and the outer ring of the bearing is connected to the rotor and the other is connected to the fixed seat.
  • the rotor can be supported by the fixing seat and the bearing.
  • the structure is simpler than that of the existing device.
  • the rotor can be operated stably while simplifying the device.
  • the bearing can reduce the operating friction of the device, thereby reducing the noise generated during the operation of the device.
  • FIG. 1 shows a schematic structural diagram of an electronic expansion valve according to Embodiment 1 of the present invention
  • FIG. 2 shows a cross-sectional view of the fixing base in FIG. 1;
  • FIG. 3 shows a schematic structural view of the fixing base in FIG. 1;
  • FIG. 4 shows a schematic structural diagram of the stopper in FIG. 1;
  • FIG. 5 shows a cross-sectional view at A-A in FIG. 4;
  • FIG. 6 shows a schematic structural diagram of an electronic expansion valve according to Embodiment 2 of the present invention.
  • FIG. 7 shows a schematic structural diagram of an electronic expansion valve according to Embodiment 3 of the present invention.
  • FIG. 8 shows a schematic structural diagram of an electronic expansion valve according to Embodiment 4 of the present invention.
  • FIG. 9 shows a schematic structural view of the fixing base in FIG. 8.
  • FIG. 10 shows a schematic structural diagram of an electronic expansion valve according to Embodiment 5 of the present invention.
  • Valve body 11. Casing; 12. Valve seat; 12a, Valve cavity; 13, Sleeve; 20, Rotor; 21, Magnet; 22, Connection plate; 30, Fixed seat; 40, Bearing; 50, Screw ; 61, stopper; 62, guide limit groove; 63, first boss; 64, second boss; 70, valve needle assembly; 71, valve sleeve; 72, valve needle; 73, pretension spring; 74, sphere; 75, gasket.
  • Embodiment 1 of the present invention provides an electronic expansion valve.
  • the electronic expansion valve includes a valve body 10, a rotor 20, a fixed seat 30 and a bearing 40.
  • the rotor 20 is rotatably provided in the valve body 10
  • the fixed seat 30 is fixedly provided in the valve body 10
  • the bearing 40 is provided between the rotor 20 and the fixed seat 30, and the inner and outer rings of the bearing 40 One of them is connected to the rotor 20 and the other is connected to the fixed base 30.
  • the inner ring of the bearing 40 may be connected to the rotor 20, correspondingly the outer ring of the bearing 40 is connected to the fixed seat 30, or the inner ring of the bearing 40 may be connected to the fixed seat 30, correspondingly the outer ring of the bearing 40 and the rotor 20 connections.
  • the electronic expansion valve includes: a valve body 10, a rotor 20, a fixed seat 30, and a bearing 40.
  • the rotor 20 is rotatably disposed in the valve body 10
  • the fixed seat 30 is fixedly disposed in the valve body 10
  • one of the inner ring and the outer ring of the bearing 40 is connected to the rotor 20, and the other is connected to the fixed seat 30.
  • the fixed seat 30 and the bearing 40 can support the rotor 20, which simplifies the device and ensures stable rotation of the rotor 20.
  • the stability during the rotation of the rotor 20 can be ensured, thereby reducing the noise generated during the operation of the device.
  • the electronic expansion valve further includes a screw 50.
  • the screw 50 is disposed in the valve body 10.
  • One end of the screw 50 is sequentially provided with a fixed seat 30 and a bearing 40 and is screwed to the rotor 20.
  • the rotor 20 is used to drive the screw 50 along Axial movement.
  • the rotor 20 includes: a magnet 21 and a connecting plate 22.
  • the magnet 21 is sleeved on the outer side of the screw 50
  • the connecting plate 22 is provided on the magnet 21
  • the screw 50 is threaded on the connecting plate 22
  • the connecting plate 22 is screwed
  • the connecting plate 22 and the fixing seat 30 are respectively Located on both sides of the bearing 40, specifically, in this example, the outer ring of the bearing 40 is connected to the connecting plate 22, and the inner ring of the bearing 40 is connected to the fixed seat 30.
  • the connecting plate 22 and the fixed base 30 are connected to the bearing 40 by welding.
  • the magnetic field generated when the coil is energized acts on the magnet 21 to rotate the rotor 20, and the rotor 20 is screwed to the screw 50, and the screw 20 is driven by the rotor 20 With the axial movement, the valve needle assembly 70 opens or closes the valve port under the action of the screw 50.
  • the screw 50 and the fixing seat 30 are in clearance fit.
  • the fixing seat 30 prevents the interference of the screw 50 to perform axial movement and at the same time plays a guiding role, which improves the stability of the screw 50 during ascent or descent.
  • the electronic expansion valve further includes a first limit structure, wherein the first limit structure is disposed between the screw 50 and the fixed seat 30, and the first limit structure is used to limit the displacement of the screw 50 relative to the fixed seat 30 and Turn.
  • the screw 50 can be brought into contact with the fixed seat 30 during the process of opening the valve port of the electronic expansion valve, which plays an upper limit role.
  • the first limiting structure includes: a stopper 61 and a guide limiting groove 62.
  • the stopper piece 61 is fixedly disposed on the screw 50, and the stopper piece 61 has an extending end, and the extending end has an angle with the screw 50.
  • the guide limit groove 62 is provided on the side wall of the fixed seat 30, and the extension direction of the guide limit groove 62 is the same as the axis direction of the screw 50, and the extended end of the stopper 61 is located in the guide limit groove 62.
  • the positioning groove 62, the valve seat 12 and the stopper 61 cooperate to limit the displacement and rotation of the screw 50 relative to the fixed seat 30, thereby improving the stability of the device structure.
  • the stopping piece 61 may have one extending end or multiple extending ends, and one or more guide limiting grooves 62 are provided on the side wall of the fixing base 30 corresponding to the stopping piece 61.
  • the stopper 61 is provided with two extending ends, and the corresponding side wall of the fixing seat 30 is provided with two guide limiting grooves 62.
  • the valve body 10 includes the sleeve 11 and the valve seat 12, and the rotor 20, the fixed seat 30, the bearing 40 and the screw 50 are all disposed between the sleeve 11 and the valve seat 12.
  • the valve seat 12 has a valve cavity 12a and a mounting hole communicating with the valve cavity 12a.
  • the electronic expansion valve further includes a valve needle assembly 70, and the valve needle assembly 70 is movably disposed in the mounting hole.
  • the screw 50 is connected to the valve needle assembly 70, which has a first position to close the valve port and a second position to open the valve port.
  • the rotation of the rotor drives the screw to move axially, thereby causing the valve needle assembly 70 to move axially between the first position and the second position, thereby achieving the effect of opening or closing the valve port.
  • the valve needle assembly 70 includes a valve sleeve 71, a valve needle 72, and a pretension spring 73.
  • the valve sleeve 71 is movably arranged in the mounting hole, one end of the screw 50 is connected to the valve sleeve 71, and one end of the valve needle 72 is movably arranged in the valve sleeve 71, and the pretension spring 73 is arranged in the valve sleeve 71.
  • the pretension spring 73 is used to provide a pretension to the valve needle 72.
  • the second embodiment of the present invention provides an electronic expansion valve.
  • the valve needle assembly 70 further includes a second limit structure.
  • the second limit structure is provided on the valve Between the needle 72 and the screw 50, the second limiting structure is used to limit the relative displacement of the valve needle 72 and the screw 50.
  • the end of the valve needle 72 located in the valve sleeve 71 is provided with a first limiting hole.
  • the second limiting structure includes a ball 74 and a gasket 75.
  • the ball 74 is disposed in the valve sleeve 71, and the ball 74 is partially disposed in the first limiting hole, the gasket 75 is disposed between the ball 74 and the screw 50, and the gasket 75 is provided with a second limiting hole ,
  • the ball 74 is partially disposed in the second limiting hole, wherein the ball 74 is fixedly connected to one of the first limiting hole and the second limiting hole, in this example, the ball 74 and the first limiting hole are welded Way to connect.
  • One end of the pretension spring 73 is connected to the valve sleeve 71, and the other end of the pretension spring 73 is connected to the gasket 75.
  • the valve needle 72 can be automatically guided inside the valve sleeve 71 to avoid the problem of coaxiality Affect product performance.
  • Embodiment 3 of the present invention provides an electronic expansion valve.
  • the valve body 10 further includes a sleeve 13.
  • the sleeve 13 is sleeved on the valve needle assembly 70. Outside, and the sleeve 13 is fixedly disposed in the mounting hole, the end of the fixing seat 30 away from the bearing 40 is connected to the end surface of the sleeve 13.
  • the sleeve 13 is also configured in a stepped structure.
  • the sleeve 13 By connecting the sleeve 13 and the fixed seat 30 and sleeved on the outer side of the valve needle assembly 70, the sleeve 13 can align the valve needle 72 It plays a guiding role, thereby realizing the axial movement of the valve needle assembly 70 along with the screw 50, thereby controlling the opening state of the valve port.
  • the electronic expansion valve provided in this embodiment by designing the valve seat into a single body, can extend the end portion of the sleeve 13 close to the flow channel into the valve cavity 12a, so that Realize the structure of complex flow channels.
  • the noise of the fluid during the operation of the device can be reduced, and the valve needle 72 can be guided by the sleeve 13 to improve the coaxiality of the valve needle 72, which not only reduces the processing difficulty, but also ensures the performance of the device.
  • Embodiment 4 of the present invention provides an electronic expansion valve.
  • the first limiting structure includes a first boss 63 and a second boss 64 .
  • the first boss 63 is disposed on the side wall of the screw 50
  • the second boss 64 is disposed on the inner wall of the fixed seat 30, and the first boss 63 cooperates with the second boss 64 to restrict the screw 50 relative to the fixed seat
  • the upward displacement of 30 is fixedly connected to the valve sleeve 71 through the valve needle 72, and the first boss 63 cooperates with the valve sleeve 71 to restrict the downward displacement of the screw 50 relative to the fixed seat 30.
  • the first boss 63 is formed on the side wall of the screw 50 to form the first boss 63, and the through hole in the fixing seat 30 is set as the first stepped hole and the second stepped hole communicating with each other ,
  • the step between the two stepped holes forms a second boss 64, wherein the diameter of the first stepped hole is larger than the diameter of the second stepped hole, and the first stepped hole is located below the second stepped hole, the first boss 63 Located in the first stepped hole, when the first boss 63 moves upward with the screw 50 to contact with the second boss 64, the screw 50 stops continuing to move upward.
  • the first boss 63 cooperates with the valve sleeve 71 to limit the downward displacement of the screw 50 relative to the fixed seat 30.
  • the fixing seat 30 has a through hole
  • the cross section of the through hole is a non-circular structure
  • the screw 50 has a threaded section and a limit section
  • the threaded section of the screw 50 is threadedly connected to the rotor 20
  • the cross section matches the cross section of the through hole to restrict the rotation of the screw 50 relative to the fixed seat 30. Since the fixed seat 30 is fixedly arranged on the valve body 10, the above structure can ensure that the screw 50 only moves axially and does not rotate, which improves the reliability of the device.
  • the cross section of the through hole may be elliptical, triangular, or rectangular. As long as the cross section of the limiting section of the screw 50 matches the cross section of the through hole, the rotation of the screw 50 relative to the fixed seat 30 can be restricted.
  • the screw 50 can also be extended to achieve the same limiting effect as the first limiting structure in the second embodiment.
  • the screw 50 When the screw 50 opens the valve port and continues to move upward, the screw 50 will 11 The inner wall contacts, so that the screw 50 stops continuing to move upwards and plays an upper limit role.
  • the valve needle 72 and the valve sleeve 71 into an integrated structure, and the first boss 63 cooperates with the valve sleeve 71 to play a lower limit position.
  • the fifth embodiment of the present invention provides an electronic expansion valve.
  • an annular convex edge is provided on the side of the connecting plate 22 facing the bearing 40 .
  • the ring-shaped convex edge sleeve is disposed outside the bearing 40.
  • the bearing 40 can be fixed to the connecting plate 22 by means of interference fit or shrinkage.
  • the processing is simplified The process makes the device more suitable for mass production.
  • orientation words such as “front, back, up, down, left, right", “horizontal, vertical, vertical, horizontal” and “top and bottom” indicate the orientation Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, just to facilitate the description of the present invention and simplify the description, in the case of no contrary description, these orientation words do not indicate and imply that the device or element It must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the scope of protection of the present invention; the orientation words “inside and outside” refer to inside and outside relative to the contour of each component itself.
  • spatially relative terms such as “above”, “above”, “above”, “above”, etc. can be used here to describe as shown in the figure The spatial relationship between a device or feature shown and other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described in the figures. For example, if the device in the drawings is turned upside down, a device described as “above another device or configuration” or “above another device or configuration” will then be positioned as “below other device or configuration” or “in Under other devices or structures”. Thus, the exemplary term “above” may include both “above” and “below” orientations. The device can also be positioned in other different ways (rotated 90 degrees or at other orientations), and the relative description of the space used here is explained accordingly.

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

Abstract

一种电子膨胀阀，包括：阀体（10）；转子（20），可转动地设置在阀体（10）内；固定座（30），固定设置在阀体（10）内；轴承（40），设置在转子（20）与固定座（30）之间，轴承（40）的内圈和外圈中的其中一个与转子（20）连接，另一个与固定座（30）连接。

Description

电子膨胀阀 技术领域
本发明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，电子膨胀阀通常由转子、螺杆、固定座以及阀针组件等部件构成，其中螺杆和转子连接，阀针组件通与螺杆连接。电子膨胀阀通过转子带动螺杆轴向移动，进而带动阀针组件进行轴向移动，以实现封堵、打开阀口的目的。但采用上述结构，电子膨胀阀存在结构复杂、噪音大的问题。
发明内容
本发明提供一种电子膨胀阀，以解决现有技术中的结构复杂、噪音大的问题。
本发明提供了一种电子膨胀阀，电子膨胀阀包括：阀体；转子，可转动地设置在阀体内；固定座，固定设置在阀体内；轴承，设置在转子与固定座之间，轴承的内圈和外圈中的其中一个与转子连接，另一个与固定座连接。
进一步地，电子膨胀阀还包括：螺杆，设置在阀体内，螺杆的一端依次穿设固定座和轴承并与转子螺纹连接，转子用于驱动螺杆沿轴向移动。
进一步地，转子包括：磁体，套设在螺杆的外侧；连接板，设置在磁体上，螺杆穿设在连接板上，并与连接板螺纹连接，连接板和固定座分别位于轴承的两侧，轴承的内圈和外圈中的其中一个与连接板连接，另一个与固定座连接。
进一步地，螺杆与固定座为间隙配合。
进一步地，电子膨胀阀还包括：第一限位结构，设置在螺杆与固定座之间，第一限位结构用于限制螺杆相对固定座的位移和转动。
进一步地，第一限位结构包括：止挡片，固定设置在螺杆上，止挡片具有延伸端，延伸端的延伸方向与螺杆的轴向具有夹角；导向限位槽，设置在固定座的侧壁上，导向限位槽的延伸方向与螺杆的轴线方向相同，止挡片的延伸端位于导向限位槽内，导向限位槽与止挡片配合以限制螺杆相对固定座的位移和转动。
进一步地，第一限位结构包括：第一凸台，设置在螺杆的侧壁上；第二凸台，设置在固定座的内壁上，第一凸台与第二凸台配合以限制螺杆相对固定座的位移。
进一步地，阀体包括：套管；阀座，转子、固定座、轴承以及螺杆均设置在套管和阀座之间。
进一步地，阀座具有阀腔以及与阀腔连通的安装孔，电子膨胀阀还包括：阀针组件，可移动地设置在安装孔内，螺杆与阀针组件连接，阀针组件具有封闭阀口的第一位置以及打开阀口的第二位置。
进一步地，阀体还包括：套筒，套设在阀针组件的外侧，且套筒固定设置在安装孔内，固定座的远离轴承的一端与套筒的端面连接。
进一步地，阀针组件包括：阀套，可移动地设置在安装孔内，螺杆的一端与阀套连接；阀针，阀针的一端可移动地设置在阀套内；预紧弹簧，设置在阀套内，且位于阀套和阀针之间，预紧弹簧用于向阀针提供预紧力。
进一步地，阀针组件还包括：第二限位结构，设置在阀针与螺杆之间，第二限位结构用于限制阀针与螺杆的相对位移。
进一步地，阀针的位于阀套内的一端上设置有第一限位孔，第二限位结构包括：球体，设置在阀套内，且球体部分地设置在第一限位孔内；垫片，设置在球体与螺杆之间，垫片上设置有第二限位孔，球体部分地设置在第二限位孔内，预紧弹簧一端与阀套连接，预紧弹簧的另一端与垫片连接。
进一步地，连接板朝向轴承的一侧设置有环形凸沿，环形凸沿套设在轴承的外侧。
进一步地，固定座具有通孔，通孔的截面为非圆形结构，螺杆具有螺纹段和限位段，螺杆的螺纹段与转子螺纹连接，限位段的横截面与通孔的截面相适配，以限制螺杆相对固定座转动。
应用本发明的技术方案，电子膨胀阀包括阀体、转子、固定座和轴承。通过将转子可转动地设置在阀体内，固定座固定设置在阀体内，并将轴承的内圈和外圈中的其中一个与转子连接，另一个与固定座连接。通过固定座和轴承能够对转子进行支撑，其结构相对现有装置较为简单，在简化装置的同时能够使转子稳定运行，并且轴承能够降低装置的运行摩擦，进而能够降低装置运行时产生的噪音。
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发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1示出了根据本发明实施例一提供的电子膨胀阀的结构示意图；
图2示出了图1中的固定座的剖视图；
图3示出了图1中的固定座的结构示意图；
图4示出了图1中的止挡片的结构示意图；
图5示出了图4中A-A处的剖视图；
图6示出了根据本发明实施例二提供的电子膨胀阀的结构示意图；
图7示出了根据本发明实施例三提供的电子膨胀阀的结构示意图；
图8示出了根据本发明实施例四提供的电子膨胀阀的结构示意图；
图9示出了图8中的固定座的结构示意图；
图10示出了根据本发明实施例五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、阀体；11、套管；12、阀座；12a、阀腔；13、套筒；20、转子；21、磁体；22、连接板；30、固定座；40、轴承；50、螺杆；61、止挡片；62、导向限位槽；63、第一凸台；64、第二凸台；70、阀针组件；71、阀套；72、阀针；73、预紧弹簧；74、球体；75、垫片。
具体实施方式
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，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，决不作为对本发明及其应用或使用的任何限制。基于本发明中的实施例，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，都属于本发明保护的范围。
如图1至图5所示，本发明实施例一提供一种电子膨胀阀，该电子膨胀阀包括：阀体10、转子20、固定座30和轴承40。其中，转子20可转动地设置在阀体10内，固定座30固定设置在阀体10内，轴承40设置在转子20与固定座30之间，并且，轴承40的内圈和外圈中的其中一个与转子20连接，另一个与固定座30连接。具体的，轴承40的内圈可以与转子20连接，对应地轴承40的外圈与固定座30连接，或者，轴承40的内圈可以与固定座30连接，对应地轴承40的外圈与转子20连接。
在本实施例中，电子膨胀阀包括：阀体10、转子20、固定座30和轴承40。其中，转子20可转动地设置在阀体10内，固定座30固定设置在阀体10内，轴承40的内圈和外圈中的其中一个与转子20连接，另一个与固定座30连接。通过上述结构，固定座30和轴承40能够对转子20进行支撑，在简化装置的同时保证了转子20的稳定转动。并且，通过在固定座30和转子20之间增加轴承40，能够保证转子20转动过程中的稳定性，从而降低装置运行时产生的噪音。
其中，电子膨胀阀还包括螺杆50，具体的，螺杆50设置在阀体10内，螺杆50的一端依次穿设固定座30和轴承40并与转子20螺纹连接，转子20用于驱动螺杆50沿轴向移动。
具体的，转子20包括：磁体21和连接板22。其中，磁体21套设在螺杆50的外侧，连接板22设置在磁体21上，通过将螺杆50穿设在连接板22上，并与连接板22螺纹连接，且连接板22和固定座30分别位于轴承40的两侧，具体的，在本实例中轴承40的外圈与连接 板22连接，轴承40的内圈与固定座30连接。其中，连接板22和固定座30均通过焊接的方式与轴承40进行连接。
在本实施例中，通过在电子膨胀阀的阀体10的外部设置线圈，线圈通电后产生的磁场作用于磁体21使转子20发生转动，转子20与螺杆50螺纹连接，通过转子20带动螺杆50进行轴向移动，阀针组件70在螺杆50的作用下实现对阀口的开启或封闭。
在本实施例中，螺杆50与固定座30为间隙配合。通过设置上述间隙，在避免固定座30干涉螺杆50进行轴向移动的同时起到引导作用，提升了螺杆50在上升或下降过程中的稳定性。
具体的，电子膨胀阀还包括第一限位结构，其中，该第一限位结构设置在螺杆50与固定座30之间，第一限位结构用于限制螺杆50相对固定座30的位移和转动。通过设置第一限位结构，能够在电子膨胀阀开启阀口的过程中，使螺杆50与固定座30发生接触，起到上限位作用。
具体的，如图2至图5所示，第一限位结构包括：止挡片61和导向限位槽62。其中，止挡片61固定设置在螺杆50上，且止挡片61具有延伸端，延伸端与螺杆50具有夹角。导向限位槽62设置在固定座30的侧壁上，且导向限位槽62的延伸方向与螺杆50的轴线方向相同，止挡片61的延伸端位于导向限位槽62内，通过导向限位槽62、阀座12与止挡片61配合以限制螺杆50相对固定座30的位移和转动，提高装置结构的稳定性。其中，止挡片61可以具有一个延伸端也可以具有多个延伸端，且在固定座30的侧壁上与止挡片61对应设置一个或者多个导向限位槽62。在本实施例中，止挡片61设置有两个延伸端，对应的固定座30的侧壁上设置有两个导向限位槽62。
在本实施例中，阀体10包括套管11和阀座12，转子20、固定座30、轴承40以及螺杆50均设置在套管11和阀座12之间。通过上述设置，提高了装置的一体性，便于装置的安装及拆卸。
具体的，阀座12具有阀腔12a以及与阀腔12a连通的安装孔，在本实施例中，电子膨胀阀还包括阀针组件70，且阀针组件70可移动地设置在安装孔内，螺杆50与阀针组件70连接，阀针组件70具有封闭阀口的第一位置以及打开阀口的第二位置。通过转子转动带动螺杆进行轴向移动，进而使阀针组件70在第一位置和第二位置之间进行轴向移动，从而实现打开或封闭阀口的效果。
其中，阀针组件70包括：阀套71、阀针72以及预紧弹簧73。阀套71可移动地设置在安装孔内，螺杆50的一端与阀套71连接，并且，阀针72的一端可移动地设置在阀套71内，预紧弹簧73设置在阀套71内，且位于阀套71和阀针72之间，预紧弹簧73用于向阀针72提供预紧力。通过设置预紧弹簧73，能够实现阀针72在阀套71内预紧的同时，可以对阀针72起到缓冲效果，对阀针72起到保护作用。
如图6所示，本发明实施例二提供了一种电子膨胀阀，本实施例与实施例一的区别在于，阀针组件70还包括第二限位结构，第二限位结构设置在阀针72与螺杆50之间，第二限位结构用于限制阀针72与螺杆50的相对位移。通过设置第二限位结构，能够保证过关时阀针72与阀口之间存在弹簧预紧力，保证产品性能。
其中，阀针72的位于阀套71内的一端上设置有第一限位孔。具体的，第二限位结构包括球体74和垫片75。其中，球体74设置在阀套71内，且球体74部分地设置在第一限位孔内，垫片75设置在球体74与螺杆50之间，且垫片75上设置有第二限位孔，球体74部分地设置在第二限位孔内，其中球体74与第一限位孔和第二限位孔中的一个固定连接，本实例中球体74与第一限位孔之间通过焊接方式连接。预紧弹簧73一端与阀套71连接，预紧弹簧73的另一端与垫片75连接。通过第一限位孔、第二限位孔和球体74相配合，且在预紧弹簧73的作用力下，实现了阀针72在阀套71内部可自动导正，避免因同轴度问题影响产品性能。
如图7所示，本发明实施例三提供了一种电子膨胀阀，本实施例与实施例一的区别在于，阀体10还包括套筒13，套筒13套设在阀针组件70的外侧，且套筒13固定设置在安装孔内，固定座30的远离轴承40的一端与套筒13的端面连接。在本实施例中，套筒13同样设置为阶梯型结构，通过将套筒13和固定座30连接，并将套筒13套设在阀针组件70的外侧，套筒13能够对阀针72起到导向作用，从而实现了阀针组件70随着螺杆50进行轴向移动，进而控制阀口的开启状态。本实施例提供的电子膨胀阀与实施例一提供的电子膨胀阀相比，通过将阀座设计成分体式，可以通过将套筒13靠近流道的一端部分伸入到阀腔12a内，从而能够实现复杂流道的结构。采用上述结构，能够减少装置运行时流体的噪音，并利用套筒13对阀针72进行导向，提高了阀针72的同轴度，既降低了加工难度，又保证了装置的性能。
如图8和图9所示，本发明实施例四提供了一种电子膨胀阀，本实施例与实施例一的区别在于，第一限位结构包括第一凸台63和第二凸台64。其中，第一凸台63设置在螺杆50的侧壁上，第二凸台64设置在固定座30的内壁上，通过第一凸台63与第二凸台64配合以限制螺杆50相对固定座30的向上位移，通过阀针72与阀套71固定连接，第一凸台63与阀套71配合以限制螺杆50相对固定座30的向下位移。在本实施例中，通过在螺杆50的侧壁上设置圆环形凸起以形成第一凸台63，将固定座30内的通孔设置为相互连通的第一阶梯孔和第二阶梯孔，两个阶梯孔之间的台阶形成第二凸台64，其中，第一阶梯孔的直径大于第二阶梯孔的直径，且第一阶梯孔位于第二阶梯孔的下方，第一凸台63位于第一阶梯孔内，当第一凸台63随螺杆50向上移动至与第二凸台64接触时，螺杆50停止继续上移。通过阀针72与阀套71焊接，第一凸台63与阀套71配合以限制螺杆50相对固定座30的向下位移。
如图9所示，固定座30具有通孔，通孔的截面为非圆形结构，螺杆50具有螺纹段和限位段，且螺杆50的螺纹段与转子20螺纹连接，限位段的横截面与通孔的截面相适配，以限制螺杆50相对固定座30转动。由于固定座30固定设置在阀体10上，采用上述结构，能够保证螺杆50只发生轴向移动，不发生转动，提升了装置的可靠性。其中，通孔的截面可以为椭圆形、三角形、矩形等形状，只要通过螺杆50的限位段的横截面与通孔的横截面相匹配，能够限制螺杆50相对固定座30转动即可。
在其他实施例中，还可以通过将螺杆50延长，也能达到和实施例二中第一限位结构相同的限位效果，当螺杆50开启阀口继续向上移动时，螺杆50会与套管11内壁接触，从而螺杆50停止继续上移，起到上限位作用。还可以通过将阀针72与阀套71设计成一体式结构，第一凸台63与阀套71配合以起到下限位作用。
如图10所示，本发明实施例五提供了一种电子膨胀阀，该电子膨胀阀与实施例一提供的电子膨胀阀相比，在连接板22朝向轴承40的一侧设置有环形凸沿，环形凸沿套设在轴承40的外侧。利用上述结构，可以将轴承40通过过盈配合或者缩口的方式与连接板22进行固定，此种连接方式与通过焊接工艺将轴承40和连接板22连接在一起的方式相比，简化了加工工艺，使装置更适合进行批量生产。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。同时，应当明白，为了便于描述，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它示例可以具有不同的值。应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
在本发明的描述中，需要理解的是，方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本发明保护范围的限制；方位词“内、外”是指相对于各部件本身的轮廓的内外。
为了便于描述，在这里可以使用空间相对术语，如“在……之上”、“在……上方”、“在……上表面”、“上面的”等，用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是，空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如，如果附图中的器件被倒置，则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而，示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位)，并且对这里所使用的空间相对描述作出相应解释。
此外，需要说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本发明保护范围的限制。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (15)

  1. 一种电子膨胀阀，其特征在于，所述电子膨胀阀包括：
    阀体(10)；
    转子(20)，可转动地设置在所述阀体(10)内；
    固定座(30)，固定设置在所述阀体(10)内；
    轴承(40)，设置在所述转子(20)与所述固定座(30)之间，所述轴承(40)的内圈和外圈中的其中一个与所述转子(20)连接，另一个与所述固定座(30)连接。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括：
    螺杆(50)，设置在所述阀体(10)内，所述螺杆(50)的一端依次穿设所述固定座(30)和所述轴承(40)并与所述转子(20)螺纹连接，所述转子(20)用于驱动所述螺杆(50)沿轴向移动。
  3. 根据权利要求2所述的电子膨胀阀，其特征在于，所述转子(20)包括：
    磁体(21)，套设在所述螺杆(50)的外侧；
    连接板(22)，设置在所述磁体(21)上，所述螺杆(50)穿设在所述连接板(22)上，并与所述连接板(22)螺纹连接，所述连接板(22)和所述固定座(30)分别位于所述轴承(40)的两侧，所述轴承的内圈和外圈中的其中一个与所述连接板(22)连接，另一个与所述固定座(30)连接。
  4. 根据权利要求2所述的电子膨胀阀，其特征在于，所述螺杆(50)与所述固定座(30)为间隙配合。
  5. 根据权利要求2所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括：
    第一限位结构，设置在所述螺杆(50)与所述固定座(30)之间，所述第一限位结构用于限制所述螺杆(50)相对所述固定座(30)的位移和转动。
  6. 根据权利要求5所述的电子膨胀阀，其特征在于，所述第一限位结构包括：
    止挡片(61)，固定设置在所述螺杆(50)上，所述止挡片(61)具有延伸端，所述延伸端的延伸方向与所述螺杆(50)的轴向具有夹角；
    导向限位槽(62)，设置在所述固定座(30)的侧壁上，所述导向限位槽(62)的延伸方向与所述螺杆(50)的轴线方向相同，所述止挡片(61)的延伸端位于所述导向限位槽(62)内，所述导向限位槽(62)与所述止挡片(61)配合以限制所述螺杆(50)相对所述固定座(30)的位移和转动。
  7. 根据权利要求5所述的电子膨胀阀，其特征在于，所述第一限位结构包括：
    第一凸台(63)，设置在所述螺杆(50)的侧壁上；
    第二凸台(64)，设置在所述固定座(30)的内壁上，所述第一凸台(63)与所述第二凸台(64)配合以限制所述螺杆(50)相对所述固定座(30)的位移。
  8. 根据权利要求2所述的电子膨胀阀，其特征在于，所述阀体(10)包括：
    套管(11)；
    阀座(12)，所述转子(20)、所述固定座(30)、所述轴承(40)以及所述螺杆(50)均设置在所述套管(11)和所述阀座(12)之间。
  9. 根据权利要求8所述的电子膨胀阀，其特征在于，所述阀座(12)具有阀腔(12a)以及与所述阀腔(12a)连通的安装孔，所述电子膨胀阀还包括：
    阀针组件(70)，可移动地设置在所述安装孔内，所述螺杆(50)与所述阀针组件(70)连接，所述阀针组件(70)具有封闭阀口的第一位置以及打开阀口的第二位置。
  10. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀体(10)还包括：
    套筒(13)，套设在所述阀针组件(70)的外侧，且所述套筒(13)固定设置在所述安装孔内，所述固定座(30)的远离所述轴承(40)的一端与所述套筒(13)的端面连接。
  11. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀针组件(70)包括：
    阀套(71)，可移动地设置在所述安装孔内，所述螺杆(50)的一端与所述阀套(71)连接；
    阀针(72)，所述阀针(72)的一端可移动地设置在所述阀套(71)内；
    预紧弹簧(73)，设置在所述阀套(71)内，且位于所述阀套(71)和所述阀针(72)之间，所述预紧弹簧(73)用于向所述阀针(72)提供预紧力。
  12. 根据权利要求11所述的电子膨胀阀，其特征在于，所述阀针组件(70)还包括：
    第二限位结构，设置在所述阀针(72)与所述螺杆(50)之间，所述第二限位结构用于限制所述阀针(72)与所述螺杆(50)的相对位移。
  13. 根据权利要求12所述的电子膨胀阀，其特征在于，所述阀针(72)的位于所述阀套(71)内的一端上设置有第一限位孔，所述第二限位结构包括：
    球体(74)，设置在所述阀套(71)内，且所述球体(74)部分地设置在所述第一限位孔内；
    垫片(75)，设置在所述球体(74)与所述螺杆(50)之间，所述垫片(75)上设置有第二限位孔，所述球体(74)部分地设置在所述第二限位孔内，所述预紧弹簧(73)一端与所述阀套(71)连接，所述预紧弹簧(73)的另一端与所述垫片(75)连接。
  14. 根据权利要求3所述的电子膨胀阀，其特征在于，所述连接板(22)朝向所述轴承(40)的一侧设置有环形凸沿，所述环形凸沿套设在所述轴承(40)的外侧。
  15. 根据权利要求2所述的电子膨胀阀，其特征在于，所述固定座(30)具有通孔，所述通孔的截面为非圆形结构，所述螺杆(50)具有螺纹段和限位段，所述螺杆(50)的螺纹段与所述转子(20)螺纹连接，所述限位段的横截面与所述通孔的截面相适配，以限制所述螺杆(50)相对所述固定座(30)转动。
PCT/CN2018/123995 2018-12-26 2018-12-26 电子膨胀阀 WO2020132967A1 (zh)

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