CN113217644A - Electronic expansion valve and refrigerating system - Google Patents

Electronic expansion valve and refrigerating system Download PDF

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Publication number
CN113217644A
CN113217644A CN202110453286.9A CN202110453286A CN113217644A CN 113217644 A CN113217644 A CN 113217644A CN 202110453286 A CN202110453286 A CN 202110453286A CN 113217644 A CN113217644 A CN 113217644A
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CN
China
Prior art keywords
assembly
valve
transmission
planetary
excitation
Prior art date
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Pending
Application number
CN202110453286.9A
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Chinese (zh)
Inventor
崔国强
房军
张国旭
华东旭
姜亦强
张庆华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Yudian Electronic Technology Co ltd
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Shanghai Yudian Electronic Technology Co ltd
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Publication date
Application filed by Shanghai Yudian Electronic Technology Co ltd filed Critical Shanghai Yudian Electronic Technology Co ltd
Priority to CN202110453286.9A priority Critical patent/CN113217644A/en
Publication of CN113217644A publication Critical patent/CN113217644A/en
Pending legal-status Critical Current

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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
    • 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
    • F16K1/46—Attachment of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing

Abstract

The invention discloses an electronic expansion valve and a refrigeration system.A valve needle assembly is arranged to comprise a valve needle, a base, a connecting sleeve, an elastic part and a sealing part; the valve needle is connected to the base in a sliding manner through the elastic piece; the base is connected with the connecting sleeve through threads to form a combination body, the combination body is also connected with the valve body assembly through threads, and a sealing piece is arranged at a gap between the combination body and the valve body assembly to seal, so that the valve needle assembly is connected with the valve body assembly. The existing interference fit assembly form is replaced by the thread assembly form, so that only screwing is needed during assembly, and the requirement on machining precision is low; meanwhile, the sealing element is arranged to seal leakage which is difficult to assemble by threads, so that a better sealing effect than the original assembly form is achieved, and the problems of difficult processing and manufacturing and difficult assembly between the valve needle part and the valve body of the conventional electronic expansion valve are solved.

Description

Electronic expansion valve and refrigerating system
Technical Field
The invention belongs to the technical field of expansion valves, and particularly relates to an electronic expansion valve and a refrigeration system.
Background
The electronic expansion valve adjusts the liquid supply amount of the evaporator according to a preset program, and is called as the electronic expansion valve because of belonging to an electronic adjustment mode. The intelligent energy-saving refrigeration system is suitable for the development requirement of refrigeration machine-electric integration, has incomparable excellent characteristics of a thermal expansion valve, provides conditions for intelligent control of the refrigeration system, and is a self-control energy-saving element with a good development prospect.
The basic principle is that the rotor body rotates after being excited by a magnetic field, and the rotation of the rotor body drives the valve body to open and close through the driving assembly. However, the existing electronic expansion valves have the problems of high requirements on processing technology, and difficulty in processing or assembling. For example, in an existing electronic expansion valve, an interference fit installation manner is adopted between a valve needle portion and a valve body, and the valve needle portion is directly pressed on the valve body.
Disclosure of Invention
The invention aims to provide an electronic expansion valve and a refrigeration system, and aims to solve the problems of difficulty in processing and manufacturing and difficulty in assembling between a valve needle part and a valve body of the conventional electronic expansion valve.
In order to solve the problems, the technical scheme of the invention is as follows:
an electronic expansion valve of the present invention includes:
the valve body assembly is internally provided with a valve chamber;
the valve needle assembly is movably arranged in the valve chamber along a first direction and used for sealing or opening the valve chamber;
the excitation part is arranged on the valve body assembly and matched with the valve body assembly to form a transmission chamber;
the planet assembly is rotationally connected into the transmission cavity, and a magnetic ring corresponding to the excitation part is arranged on the planet assembly and used for driving the planet assembly to rotate and outputting torque;
the input end of the transmission assembly is connected with the output end of the planetary assembly, and the output end of the transmission assembly is in contact with the input end of the valve needle assembly and is used for converting the torque of the planetary assembly into linear motion for pushing the valve needle assembly to move along the first direction;
the valve needle assembly comprises a valve needle, a base, a connecting sleeve, an elastic part and a sealing part; the base is provided with a guide hole of which the axis is in a first direction; the connecting sleeve is arranged in the transmission cavity, the first end of the connecting sleeve is in threaded connection with the base to form a combination body, and the combination body is in threaded connection with the inner wall surface of the transmission cavity; the valve needle penetrates through the guide hole and the inner cavity of the connecting sleeve, the valve needle is connected to the guide hole in a sliding mode, and the first end of the valve needle extends into the valve chamber and is used for plugging or opening the valve chamber; two ends of the elastic part are respectively connected with the base and the second end of the valve needle; the sealing element is arranged at a gap between the connecting sleeve and the valve body assembly.
According to the electronic expansion valve, the outer side of the base is respectively provided with a first external thread and a second external thread along a first direction; a first internal thread is arranged in the inner cavity of the first end of the connecting sleeve, and a third external thread which is the same as the second external thread is arranged on the outer side of the first end of the connecting sleeve; the connecting sleeve is connected to the base through the first external thread and the first internal thread, and the second external thread and the third external thread are combined into a fourth external thread; and a second internal thread is arranged on the inner wall surface of the transmission cavity, and the connecting sleeve and the base are connected with the transmission cavity through the fourth external thread and the second internal thread.
According to the electronic expansion valve, the sealing element comprises a first seal and a second seal, and the first seal and the second seal are sequentially arranged at a gap between the connecting sleeve and the valve body assembly.
According to the electronic expansion valve, the second end of the valve needle is in threaded connection with the self-locking nut, the elastic piece is sleeved on the valve needle, and two ends of the elastic piece are respectively connected with the self-locking nut and the base.
The electronic expansion valve comprises a transmission assembly, a driving assembly and a control assembly, wherein the transmission assembly comprises a transmission seat and a transmission shaft; the transmission seat is arranged in the inner cavity of the connecting sleeve, and a transmission threaded hole arranged along a first direction is formed in the transmission seat; the transmission shaft is in threaded transmission connection with the transmission threaded hole, the first end of the transmission shaft is abutted to the second end of the valve needle, and the second end of the transmission shaft is provided with a polygonal transmission hole.
The electronic expansion valve comprises a planetary assembly, a first planetary assembly, a second planetary assembly, a third planetary assembly and a fourth planetary assembly, wherein the planetary assembly is a two-stage planetary gear transmission assembly and comprises an input shaft, a central shaft, the first planetary assembly and the second planetary assembly;
the input shaft, the first planetary assembly and the second planetary assembly are sequentially sleeved on the central shaft; the input shaft and the planetary discs of the second planetary assembly are respectively connected with the transmission chamber in a rotating mode through bearings;
the magnetic ring is arranged on the input shaft and is used for driving the input shaft to rotate; the input shaft is connected with the sun gear of the first planetary assembly; the planetary plate of the first planetary assembly is connected with the sun gear of the second planetary assembly; and an output shaft is arranged on the planetary disc of the second planetary assembly and is in transmission connection with the input end of the transmission assembly.
The electronic expansion valve of the invention, the said excitation part includes the excitation assembly, encloser end cap and encloser shell;
the excitation assembly is arranged on the valve body assembly and matched with the valve body assembly to form an excitation space;
the housing shell is arranged in the excitation space; the first end of the housing shell is provided with the housing end cover, and the second end of the housing shell is connected with the connecting sleeve to form the transmission cavity in a matching manner.
In the electronic expansion valve, the excitation assembly comprises an excitation shell and an electromagnetic coil; the excitation shell is arranged on the valve body assembly and matched with the valve body assembly to form the excitation space; the electromagnetic coil is arranged in the excitation shell and surrounds the magnetic ring; and a communication interface electrically connected with the electromagnetic coil is arranged on the excitation shell.
In the electronic expansion valve, the excitation part is also internally provided with a control chamber, the control chamber is internally provided with a control part, and the control part is in signal connection with the excitation part.
The electronic expansion valve comprises a valve body assembly, a valve seat assembly and a valve seat, wherein the valve body assembly comprises a valve body and a valve seat; the valve seat is arranged in the valve body, and the valve chamber is arranged in the valve seat; the valve body is provided with an inlet, an outlet and an execution port which are communicated with the valve chamber; the excitation part is arranged on the valve body and is matched with the execution port to form the transmission chamber.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1. according to one embodiment of the invention, the electronic expansion valve comprises a valve body assembly, a valve needle assembly, an excitation part, a planet assembly and a transmission assembly. The excitation part excites the magnetic ring on the planet component to rotate, the planet component transmits the rotation to the transmission component, and the transmission component converts the rotation into linear motion to push the valve needle component to open or close the valve chamber in the valve body component, thereby realizing the function of the electronic expansion valve. Meanwhile, the valve needle assembly comprises a valve needle, a base, a connecting sleeve, an elastic part and a sealing part; the valve needle is connected to the base in a sliding manner through the elastic piece; the base is connected with the connecting sleeve through threads to form a combination body, the combination body is also connected with the valve body assembly through threads, and a sealing piece is arranged at a gap between the combination body and the valve body assembly to seal, so that the valve needle assembly is connected with the valve body assembly. The existing interference fit assembly form is replaced by the thread assembly form, so that only screwing is needed during assembly, and the requirement on machining precision is low; meanwhile, the sealing element is arranged to seal leakage which is difficult to assemble by threads, so that a better sealing effect than the original assembly form is achieved, and the problems of difficult processing and manufacturing and difficult assembly between the valve needle part and the valve body of the conventional electronic expansion valve are solved.
2. According to the embodiment of the invention, the guide part of the valve needle is divided into the base and the connecting sleeve for processing and is connected through the threads, so that the processing difficulty is low and the assembly is simple.
3. According to the valve needle, the self-locking nut is arranged at the second end of the valve needle and is in threaded connection, the elastic part is limited between the self-locking nut and the base, so that the elastic force required by the valve needle for opening the valve chamber is provided, the processing difficulty is low, the process is easy to realize, the assembly difficulty is low, and meanwhile, the maintenance and the replacement are convenient.
4. According to the embodiment of the invention, the conventional cover covering the planet assembly and the magnetic ring is divided into the cover shell and the cover shell end cover, two ends of the cover shell are respectively welded with the cover shell end cover and the connecting sleeve and are divided into two parts, so that the processing is simple, and the problem of low yield caused by easy damage of the conventional cover during stretching processing is solved.
Drawings
FIG. 1 is a cross-sectional view of an electronic expansion valve of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the electronic expansion valve of the present invention without a control plate and an inductive magnet ring;
FIG. 3 is a cross-sectional view of an embodiment of the electronic expansion valve of the present invention having a control plate and an inductive magnet ring;
fig. 4 is an exploded view of the planetary assembly and gearing assembly of the electronic expansion valve of the present invention;
fig. 5 is an exploded view of a valve needle assembly of an electronic expansion valve of the present invention.
Description of reference numerals: 1: a valve body; 2: a valve seat; 3: a valve needle; 4: a base; 5: connecting sleeves; 6: a seal member; 7: an elastic member; 8: a transmission seat; 9: a drive shaft; 10: a magnetic ring; 11: a central shaft; 12: a first planetary gear set; 13: a first planet disk; 14: a second planetary gear set; 15: a second planet disk; 16: a ring gear; 17: a first rolling bearing; 18: a second rolling bearing; 19: a ring gear seat; 20: an excitation housing; 21: a housing end cap; 22: a housing shell; 23: a control panel; 24: a cover plate; 25: a self-locking nut; 26: a magnetic ring; 27: a first sun gear.
Detailed Description
The electronic expansion valve and the refrigeration system according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Example one
Referring to fig. 1 to 5, in one embodiment, an electronic expansion valve includes a valve body assembly, a valve needle assembly, an exciting portion, a planetary assembly, and a transmission assembly.
A valve chamber is arranged in the valve body component. The valve needle assembly is movably arranged in the valve chamber along a first direction and used for blocking or opening the valve chamber. The excitation part is arranged on the valve body assembly and is matched with the valve body assembly to form a transmission chamber. The planet component is connected in the transmission chamber in a rotating way, and the planet component is provided with a magnetic ring 10 corresponding to the excitation part and used for driving the planet component to rotate and outputting torque. The input end of the transmission component is connected with the output end of the planetary component, and the output end of the transmission component is abutted against the input end of the valve needle component and used for converting the torque of the planetary component into linear motion for pushing the valve needle component to move along the first direction.
The valve needle assembly comprises a valve needle 3, a base 4, a connecting sleeve 5, an elastic part 7 and a sealing part 6. The base 4 is provided with a guide hole with an axis in a first direction. The connecting sleeve 5 is arranged in the transmission cavity, the first end of the connecting sleeve 5 is in threaded connection with the base 4 to form a combination, and the combination is in threaded connection with the inner wall surface of the transmission cavity. The valve needle 3 is arranged in the guide hole and the inner cavity of the connecting sleeve 5 in a penetrating mode, the valve needle 3 is connected to the guide hole in a sliding mode, and the first end of the valve needle 3 extends into the valve chamber and is used for blocking or opening the valve chamber. The two ends of the elastic member 7 are connected to the second ends of the base 4 and the needle 3, respectively. The sealing member 6 is arranged at the gap between the connecting sleeve 5 and the valve body assembly.
The embodiment is realized by arranging the electronic expansion valve which comprises a valve body assembly, a valve needle assembly, an excitation part, a planet assembly and a transmission assembly. The magnetic ring 10 on the excitation part excitation planet component rotates, the planet component transmits the rotation to the transmission component, and the transmission component converts the rotation into linear motion to push the valve needle component to open or close the valve chamber in the valve body component, thereby realizing the function of the electronic expansion valve. Meanwhile, the valve needle assembly is arranged to comprise a valve needle 3, a base 4, a connecting sleeve 5, an elastic part 7 and a sealing part 6; the valve needle 3 is connected with the base 4 in a sliding way through an elastic part 7; the base 4 and the connecting sleeve 5 are connected through threads to form a combined body, the combined body is also connected with the valve body assembly through threads, and a sealing piece 6 is arranged at a gap between the combined body and the valve body assembly for sealing, so that the valve needle assembly is connected with the valve body assembly. The existing interference fit assembly form is replaced by the thread assembly form, so that only screwing is needed during assembly, and the requirement on machining precision is low; meanwhile, the sealing element 6 is arranged to seal leakage which is difficult to assemble by threads, so that a better sealing effect than the original assembly form is achieved, and the problems of difficulty in processing and manufacturing and difficulty in assembling between the valve needle part and the valve body 1 of the conventional electronic expansion valve are solved.
The following further describes the specific structure of the electronic expansion valve of the present embodiment:
in this embodiment, the valve body assembly may specifically include a valve body 1 and a valve seat 2, the valve seat 2 is disposed in the valve body 1, and the valve chamber is disposed in the valve seat 2. The valve body 1 is provided with an inlet, an outlet and an execution port which are communicated with the valve chamber. The excitation part is arranged on the valve body 1 and is matched with the execution port to form the transmission chamber. Further, both sides of the valve body 1 may be provided with screw holes or other connection interfaces, so that both sides of the valve body 1 may be provided with a bracket, so as to facilitate installation of the electronic expansion valve in a specific application scenario.
In the present embodiment, referring to fig. 5, the specific structure of the base 4 and the connecting sleeve 5 is as follows: the outer side of the base 4 may be provided with a first external thread and a second external thread, respectively, in a first direction. The inner cavity of the first end of the connecting sleeve 5 is provided with a first internal thread, and the outer side of the first end of the connecting sleeve 5 is provided with a third external thread which is the same as the second external thread. During connection, the connecting sleeve 5 is connected to the base 4 through the first external thread and the first internal thread, and at this time, the second external thread and the third external thread are combined into a complete fourth external thread. A second internal thread corresponding to the fourth external thread can be arranged on the inner wall surface of the valve body 1, and then the combination of the connecting sleeve 5 and the base 4 can be connected with the valve body 1 through the fourth external thread and the second internal thread. The guide part of the valve needle 3 is divided into two parts, namely a base 4 and a connecting sleeve 5, and the two parts are processed and connected through threads, so that the processing difficulty is low, and the assembly is simple.
Further, the sealing member 6 includes a first seal and a second seal, and the first seal and the second seal are sequentially disposed at a gap between the connecting sleeve 5 and the valve body 1. First sealed and the second is sealed all can be O type sealing washer, sets up twice seal groove in the position that valve body 1 corresponds the clearance to set up O type sealing washer in the seal groove, thereby realize sealed, and the assembly mode of sealing washer is comparatively ripe, and the assembly is simple.
Further, a self-locking nut 25 can be connected to the second end of the needle 3 through a screw thread, and the elastic member 7 is sleeved on the needle 3, and two ends of the elastic member are respectively connected to the self-locking nut 25 and the base 4. Through set up a threaded connection's self-locking nut 25 at the second end of needle 3, restrict elastic component 7 between self-locking nut 25 and base 4 to provide needle 3 and open the required elastic force of valve chamber, the processing degree of difficulty is low, easily realizes on the technology, and the assembly degree of difficulty is low, is convenient for maintain and change simultaneously.
In the present embodiment, referring to fig. 4, the transmission assembly may specifically include a transmission seat 8 and a transmission shaft 9. Wherein, the transmission seat 8 is fixedly arranged in the inner cavity of the connecting sleeve 5, and the transmission seat 8 is provided with a transmission threaded hole arranged along the first direction. The transmission shaft 9 is in threaded transmission connection with the transmission threaded hole, the first end of the transmission shaft 9 is abutted against the second end of the valve needle 3, and the second end of the transmission shaft 9 is provided with a polygonal transmission hole. Specifically, the thread of the transmission threaded hole may be a T-shaped internal thread, and the transmission shaft 9 may be provided with a corresponding T-shaped external thread, so as to realize the threaded transmission connection.
In the present embodiment, the planetary assembly is a two-stage planetary gear transmission assembly, and includes an input shaft, a central shaft 11, a first planetary assembly, and a second planetary assembly. The input shaft, the first planetary assembly and the second planetary assembly are sequentially sleeved on the central shaft 11. And the input shaft and the planetary discs of the second planetary assembly are respectively rotatably connected to the transmission chamber through bearings. The magnetic ring 10 is arranged on the input shaft and is used for driving the input shaft to rotate under the excitation action of the excitation part. The input shaft is connected with the sun gear of the first planetary assembly. The planet disk of the first planetary assembly is connected with the sun gear of the second planetary assembly. The planetary plate of the second planetary assembly is provided with an output shaft, and the output shaft is in transmission connection with the second end of the transmission shaft 9, specifically, the output shaft may be a polygonal body corresponding to the polygonal transmission hole, such as a quadrangular body or a hexagonal body, and is not limited in particular. The reason why the driving mode of the polygonal connection is adopted is that the planetary discs of the second planetary assembly are not moved in the first direction, and the transmission shaft 9 can convert the rotation into the linear motion to enable the transmission shaft 9 to move along the first direction, so that the driving mode of the fixed connection cannot be adopted, and the hole shaft is adopted to be in sliding connection and is driven through the geometric shape.
Specifically, referring to fig. 4, the first planetary assembly includes a first sun gear 27, a first planetary gear set 12, a first planet carrier 13, the second planetary assembly includes a second sun gear, a second planetary gear set 14, a second planet carrier 15, and the first planetary assembly and the second planetary assembly further include a common ring gear 16 and a ring gear seat 19. The gear ring base 19 is mounted on the connecting sleeve 5, the gear ring 16 is mounted on the gear ring base 19, and the gear ring 16 is sleeved on the first planetary assembly and the second planetary assembly. The specific transmission connection process is that the magnetic ring 10 drives the input shaft, the input shaft rotates around the central shaft 11 and drives the first sun gear 27 to rotate, the first sun gear 27 rotates to drive the meshed first planetary gear set 12 to rotate, and the first planetary gear set 12 is also meshed with the fixed gear ring 16, so that the first planetary disk 13 is driven to rotate, and the first-stage speed reduction is realized. The first planetary disk 13 is fixedly connected with the second sun gear so as to drive the second sun gear to rotate, the second sun gear drives the second planetary gear set 14 to rotate, and simultaneously, under the action of the fixed gear ring 16, the second planetary gear set 14 drives the second planetary disk 15 to rotate, so that the second-stage speed reduction is realized, and the rotation is transmitted to the transmission shaft 9 through an output shaft on the second planetary disk 15.
The input shaft and the magnetic ring 10 may be integrally formed, or may be assembled after being separately manufactured, and is determined according to production requirements. The input shaft is rotatably connected to the transmission chamber by means of a first rolling bearing 17, and the second planetary disk 15 is rotatably connected to the ring gear carrier 19 by means of a second rolling bearing 18.
In the present embodiment, the excitation portion may specifically include an excitation assembly, a housing end cover 21, and a housing case 22. Wherein, the excitation subassembly is located on valve body 1 and is linked together with the execution mouth, and the cooperation forms an excitation space. The housing shell 22 is arranged in the excitation space, the housing end cover 21 is mounted at the first end of the housing shell 22, and the second end of the housing shell 22 is connected with the connecting sleeve 5 to form the transmission chamber in a matching manner, namely the housing end cover 21, the housing shell 22 and the connecting sleeve 5 form the transmission chamber in a matching manner with the valve body 1.
Further, the excitation assembly specifically includes an excitation housing 20 and an electromagnetic coil. The excitation housing 20 is provided on the valve body 1 to form the above-described excitation space. The electromagnetic coil is arranged in the excitation shell 20 and is arranged around the magnetic ring 10. The excitation housing 20 is provided with a communication interface electrically connected to the electromagnetic coil for supplying power to the electromagnetic coil and receiving an external control signal.
Further, a control chamber may be further disposed in the excitation housing 20, a control portion is disposed in the control chamber, the control portion may be specifically a control board 23, and the control board 23 is in signal connection with the electromagnetic coil and is configured to receive an external signal and output a control signal to the electromagnetic coil, so as to control the rotation speed of the magnetic ring 10. A control board 23 is integrated in the valve body 1 in order to achieve control of the valve body 1. Further, an opening may be provided at the control chamber and a cover plate 24 may be provided to seal the opening to facilitate installation and replacement of the control panel 23. In a specific application scenario, for example, in an electric vehicle, if the computing power of the electric vehicle control platform is strong, an electronic expansion valve without the control board 23 may be assembled; if the computing power of the control platform is weak, an electronic expansion valve with a control board 23 can be selected, and after the control platform outputs parameters, the control board 23 receives the parameters and converts the parameters into control signals to control the opening degree of the electronic expansion valve.
Furthermore, an induction magnetic ring 26 can be arranged on the input shaft or the magnetic ring 10, and a corresponding hall sensor can be arranged on the control board 23. The induction magnet ring 26 is end-face magnetized, 2 poles (N pole, S pole). The induction magnetic ring 26 is used for generating a magnetic field, when the induction magnetic ring 26 rotates for a circle, voltage fluctuation is generated, the hall sensor above the induction magnetic ring can sense the periodic change of the magnetic field, and the change angle of the induction magnetic ring 26 is recorded, so that the position of the induction magnetic ring 26 can be accurately identified, the parameters such as the rotating speed of the transmission shaft 9, the distance for pushing the valve needle 3 and the like can be further determined, and the control panel 23 can conveniently control the magnetic field generated by the electromagnetic coil.
Example two
A refrigeration system comprising the electronic expansion valve of the first embodiment. The connection mode between the internal components of the electronic expansion valve is changed into the existing interference fit assembly mode by adopting a threaded assembly mode, so that only screwing is needed during assembly, and the requirement on the machining precision is low; meanwhile, the sealing element 6 is arranged to seal leakage which is difficult to assemble by threads, so that a better sealing effect than the original assembly form is achieved, and the problems of difficulty in processing and manufacturing and difficulty in assembling between the valve needle part and the valve body 1 of the conventional electronic expansion valve are solved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.

Claims (11)

1. An electronic expansion valve, comprising:
the valve body assembly is internally provided with a valve chamber;
the valve needle assembly is movably arranged in the valve chamber along a first direction and used for sealing or opening the valve chamber;
the excitation part is arranged on the valve body assembly and matched with the valve body assembly to form a transmission chamber;
the planet assembly is rotationally connected into the transmission cavity, and a magnetic ring corresponding to the excitation part is arranged on the planet assembly and used for driving the planet assembly to rotate and outputting torque;
the input end of the transmission assembly is connected with the output end of the planetary assembly, and the output end of the transmission assembly is in contact with the input end of the valve needle assembly and is used for converting the torque of the planetary assembly into linear motion for pushing the valve needle assembly to move along the first direction;
the valve needle assembly comprises a valve needle, a base, a connecting sleeve, an elastic part and a sealing part; the base is provided with a guide hole of which the axis is in a first direction; the connecting sleeve is arranged in the transmission cavity, the first end of the connecting sleeve is in threaded connection with the base to form a combination body, and the combination body is in threaded connection with the inner wall surface of the transmission cavity; the valve needle penetrates through the guide hole and the inner cavity of the connecting sleeve, the valve needle is connected to the guide hole in a sliding mode, and the first end of the valve needle extends into the valve chamber and is used for plugging or opening the valve chamber; two ends of the elastic part are respectively connected with the base and the second end of the valve needle; the sealing element is arranged at a gap between the connecting sleeve and the valve body assembly.
2. The electronic expansion valve according to claim 1, wherein the base is provided at an outer side thereof with first and second external threads in a first direction, respectively; a first internal thread is arranged in the inner cavity of the first end of the connecting sleeve, and a third external thread which is the same as the second external thread is arranged on the outer side of the first end of the connecting sleeve; the connecting sleeve is connected to the base through the first external thread and the first internal thread, and the second external thread and the third external thread are combined into a fourth external thread; and a second internal thread is arranged on the inner wall surface of the transmission cavity, and the connecting sleeve and the base are connected with the transmission cavity through the fourth external thread and the second internal thread.
3. The electronic expansion valve of claim 1, wherein the sealing element comprises a first seal and a second seal, and the first seal and the second seal are sequentially disposed in a gap between the connecting sleeve and the valve body assembly.
4. The electronic expansion valve according to claim 1, wherein the second end of the valve needle is threadedly connected with a self-locking nut, the elastic member is sleeved on the valve needle, and two ends of the elastic member are respectively connected with the self-locking nut and the base.
5. The electronic expansion valve of claim 1, wherein the drive assembly comprises a drive base and a drive shaft; the transmission seat is arranged in the inner cavity of the connecting sleeve, and a transmission threaded hole arranged along a first direction is formed in the transmission seat; the transmission shaft is in threaded transmission connection with the transmission threaded hole, the first end of the transmission shaft is abutted to the second end of the valve needle, and the second end of the transmission shaft is provided with a polygonal transmission hole.
6. The electronic expansion valve of claim 1, wherein the planetary assembly is a two-stage planetary gear assembly comprising an input shaft, a central shaft, a first planetary assembly, a second planetary assembly;
the input shaft, the first planetary assembly and the second planetary assembly are sequentially sleeved on the central shaft; the input shaft and the planetary discs of the second planetary assembly are respectively connected with the transmission chamber in a rotating mode through bearings;
the magnetic ring is arranged on the input shaft and is used for driving the input shaft to rotate; the input shaft is connected with the sun gear of the first planetary assembly; the planetary plate of the first planetary assembly is connected with the sun gear of the second planetary assembly; and an output shaft is arranged on the planetary disc of the second planetary assembly and is in transmission connection with the input end of the transmission assembly.
7. The electronic expansion valve according to claim 1, wherein the exciting portion includes an exciting assembly, a cover shell end cap, and a cover shell;
the excitation assembly is arranged on the valve body assembly and matched with the valve body assembly to form an excitation space;
the housing shell is arranged in the excitation space; the first end of the housing shell is provided with the housing end cover, and the second end of the housing shell is connected with the connecting sleeve to form the transmission cavity in a matching manner.
8. The electronic expansion valve of claim 7, wherein the excitation assembly comprises an excitation housing, a solenoid coil; the excitation shell is arranged on the valve body assembly and matched with the valve body assembly to form the excitation space; the electromagnetic coil is arranged in the excitation shell and surrounds the magnetic ring; and a communication interface electrically connected with the electromagnetic coil is arranged on the excitation shell.
9. The electronic expansion valve according to claim 1, wherein a control chamber is further provided in the excitation portion, a control portion is provided in the control chamber, and the control portion is in signal connection with the excitation portion.
10. The electronic expansion valve of claim 1, wherein the valve body assembly comprises a valve body and a valve seat; the valve seat is arranged in the valve body, and the valve chamber is arranged in the valve seat; the valve body is provided with an inlet, an outlet and an execution port which are communicated with the valve chamber; the excitation part is arranged on the valve body and is matched with the execution port to form the transmission chamber.
11. A refrigeration system comprising an electronic expansion valve according to any of claims 1-10.
CN202110453286.9A 2021-04-26 2021-04-26 Electronic expansion valve and refrigerating system Pending CN113217644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110453286.9A CN113217644A (en) 2021-04-26 2021-04-26 Electronic expansion valve and refrigerating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110453286.9A CN113217644A (en) 2021-04-26 2021-04-26 Electronic expansion valve and refrigerating system

Publications (1)

Publication Number Publication Date
CN113217644A true CN113217644A (en) 2021-08-06

Family

ID=77089206

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110453286.9A Pending CN113217644A (en) 2021-04-26 2021-04-26 Electronic expansion valve and refrigerating system

Country Status (1)

Country Link
CN (1) CN113217644A (en)

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