CN112283371A - Reliable and simple and easy electronic expansion valve of installation - Google Patents
Reliable and simple and easy electronic expansion valve of installation Download PDFInfo
- Publication number
- CN112283371A CN112283371A CN202011309447.9A CN202011309447A CN112283371A CN 112283371 A CN112283371 A CN 112283371A CN 202011309447 A CN202011309447 A CN 202011309447A CN 112283371 A CN112283371 A CN 112283371A
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- CN
- China
- Prior art keywords
- valve
- electronic expansion
- transmission
- reliable
- seat
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
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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
- F16K1/38—Valve members of conical shape
- F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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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
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
Abstract
The invention discloses a reliable and simply-installed electronic expansion valve, which comprises a valve body, a valve port and a valve seat which are mutually matched and connected, wherein a valve core assembly is arranged in the valve seat; the valve core assembly comprises a valve needle, a transmission screw rod, a valve needle sleeve, a sealing spring and a spring seat, wherein the transmission screw rod is connected with a transmission nut; the transmission nut and the valve seat form transition fit, and the valve port and the valve seat form interference fit; the threads on the transmission screw rod are manufactured by a rolling process, the transmission nut is made of PPS (polyphenylene sulfide), and the transmission nut is manufactured by an injection molding process. According to the electronic expansion valve, the driving screw adopts the rolled threads to match the PPS injection threads of the driving nut, so that the reliability of the driving threads is improved, and the reliability of the whole valve is improved.
Description
Technical Field
The invention relates to the technical field of electronic expansion valves, in particular to a reliable electronic expansion valve which is easy to install.
Background
The existing electronic expansion valve is generally controlled by a stepping motor to regulate the flow of a refrigerant, and comprises a driver (the stepping motor), an actuating mechanism (a thread pair), a throttling mechanism (a valve needle valve port) and related auxiliary mechanisms. The stator coil of the stepping motor receives a pulse signal provided by the controller to drive the rotor magnetic ring to rotate, and the rotor magnetic ring (integrated with the mandrel screw) rotates to drive the valve needle (integrated with the female thread) to move up and down axially, so that the through-flow sectional areas of the valve needle and the valve port are controlled to adjust the refrigerating capacity, and the efficiency of the evaporator is matched. The main failure mode of the electronic expansion valve is failure of a transmission thread, particularly a transmission female thread, and because the transmission male thread is generally obtained by rolling stainless steel, the surface quality and the strength are high; the transmission female thread is generally made of brass or bronze, so that valve opening pulse and internal leakage failure are easily caused by abrasion of the male thread, or the maximum valve opening pressure difference is unqualified and even the valve is blocked due to increase of friction resistance after a certain number of times of friction.
The existing electronic expansion valve transmission nut is made of bronze, and after a certain service life cycle, the maximum valve opening pressure difference is unqualified or the valve is stuck, and valve opening pulse and internal leakage failure are possible to occur; and the processing cost of parts is higher, and the difference of the pressing-in force of the transmission nut is larger.
Disclosure of Invention
In view of the above, there is a need to provide an electronic expansion valve that is reliable and easy to install, thereby improving the reliability of the entire valve; and the processing cost of parts is properly reduced, and the assembly process is optimized.
The invention provides a reliable and simply-installed electronic expansion valve, which comprises a valve body, a valve port and a valve seat which are mutually matched and connected, wherein a valve core assembly is arranged in the valve seat; the valve core assembly comprises a valve needle, a transmission screw rod, a valve needle sleeve, a sealing spring and a spring seat, wherein the transmission screw rod is connected with a transmission nut; the transmission nut and the valve seat form transition fit, and the valve port and the valve seat form interference fit; the threads on the transmission screw rod are manufactured by a rolling process, the transmission nut is made of PPS (polyphenylene sulfide), and the transmission nut is manufactured by an injection molding process.
In some embodiments, the valve port is provided with a guide section and a central hole arranged below the guide section, and the guide section is in fit connection with the valve needle.
In some embodiments, the valve port is made of brass.
In some embodiments, the valve needle and the valve seat are both made of stainless steel.
According to the electronic expansion valve, the driving screw adopts the rolled threads to be matched with the PPS injection molding threads of the driving nut, so that the reliability of the driving threads is improved, and the reliability of the whole valve is improved; the coaxiality of the valve needle and the flow regulating center hole on the valve port is improved, the internal leakage of the valve is reduced from the design angle, and the reliable and stable operation of a refrigeration system is ensured; and the processing cost of the stainless steel valve seat is properly reduced, so that the product competitiveness of the electronic expansion valve is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a cross-sectional view of an electronic expansion valve according to the present invention, which is reliable and easy to install;
fig. 2 is a schematic view of a valve port structure of an electronic expansion valve according to the present invention, which is reliable and easy to install.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1-2, an electronic expansion valve that is reliable and easy to install includes a valve body 1, a valve port 2, and a valve seat 3 that are connected with each other in a matching manner, wherein a valve core assembly is disposed in the valve seat 3; the valve core assembly comprises a valve needle 4, a transmission screw rod 5, a valve needle sleeve 6, a sealing spring 7 and a spring seat 8, wherein the transmission screw rod 5 is connected with a transmission nut 9; the transmission nut 9 and the valve seat 3 form transition fit, and the valve port 2 and the valve seat 3 form interference fit.
In this embodiment, the threads on the drive screw 5 are formed by a rolling process, the drive nut 9 is formed by PPS, and the drive nut 9 is formed by an injection molding process.
In some embodiments, the valve port 2 is provided with a guiding section 21 and a central hole 22 disposed below the guiding section 21, and the guiding section 21 is in fit connection with the valve needle 4.
Furthermore, valve port 2 adopts the brass material to make, improves the leakproofness, reduces the processing degree of difficulty.
Correspondingly, the valve needle 4 is made of stainless steel, so that the valve needle and a brass valve port can be conveniently formed into a sealing combination, and the valve seat 3 is made of stainless steel, so that the structure is simplified, and the valve seat is only used for fixed connection.
According to the electronic expansion valve, the driving screw 5 adopts the rolled threads to match the PPS injection threads of the driving nut, so that the reliability of the driving threads is improved, and the reliability of the whole valve is improved; the coaxiality of the valve needle 4 and the flow regulating central hole 22 on the valve port 3 is improved, the internal leakage of the valve is reduced from the design angle, and the reliable and stable operation of a refrigeration system is ensured; and the processing cost of the stainless steel valve seat 3 is properly reduced, thereby improving the product competitiveness of the electronic expansion valve.
In the specific application, the male thread on the transmission screw 5 of the electronic expansion valve is obtained by adopting a rolling process, the transmission nut 9 is obtained by adopting a PPS injection molding process, the transmission nut 9 is in transition fit with the valve seat 3, the valve port 2 is in interference fit with the valve seat 3, and the upper surface and the lower surface of the fixed section of the transmission nut 9 are tightly pressed by the valve seat 3 and the valve port 2. The upper section of the valve port 2 part is provided with a valve needle guide section 21; the middle section provides a coolant channel (through hole) to ensure that the coolant at the inlet of the valve body enters the valve port; the lower section of the valve port 2 is provided with a central hole 22 for adjusting the refrigerant flow together with the valve needle 4. The valve core assembly consists of five parts, namely a valve needle 4, a transmission screw rod 5, a valve needle sleeve 6, a sealing spring 7 and a spring seat 8, wherein the valve needle sleeve 6 is pressed into an inner hole of the valve needle in an interference manner. The assembly process of the whole valve is that the valve core assembly is firstly screwed into the transmission nut 9, then the valve core assembly and the transmission nut are pressed into the valve seat 3 together, then the valve port 2 is pressed into the valve seat 3 in an interference manner, then the valve core assembly and the valve body are screwed together, and finally the stop spring, the rotor assembly, the shell and the stepping motor stator assembly are installed. On one hand, the rolling male thread is matched with the PPS injection molding female thread, so that the reliability of the transmission thread is improved, and the reliability of the whole valve is improved; and the valve needle guide section and the flow regulating center hole are both arranged on the valve port, so that the coaxiality of the valve needle and the flow regulating center hole is improved, and the performance of the whole valve is improved. On the other hand, put the guide section of needle on the brass valve port of easy processing, reduce the processing degree of difficulty of stainless steel disk seat, reduce the processing cost of part to optimize the assembly process of spare part, improve the competitiveness of product.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A reliable and simple-to-mount electronic expansion valve is characterized by comprising a valve body, a valve port and a valve seat which are mutually matched and connected, wherein a valve core assembly is arranged in the valve seat; the valve core assembly comprises a valve needle, a transmission screw rod, a valve needle sleeve, a sealing spring and a spring seat, wherein the transmission screw rod is connected with a transmission nut; the transmission nut and the valve seat form transition fit, and the valve port and the valve seat form interference fit; the threads on the transmission screw rod are manufactured by a rolling process, the transmission nut is made of PPS (polyphenylene sulfide), and the transmission nut is manufactured by an injection molding process.
2. A reliable and easily installed electronic expansion valve according to claim 1, wherein: the valve port is provided with a guide section and a center hole arranged below the guide section, and the guide section is connected with the valve needle in a matching way.
3. A reliable and easily installed electronic expansion valve according to claim 1, wherein the valve port is made of brass.
4. A reliable and easily installed electronic expansion valve according to claim 1, wherein said valve needle and said valve seat are made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309447.9A CN112283371A (en) | 2020-11-20 | 2020-11-20 | Reliable and simple and easy electronic expansion valve of installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309447.9A CN112283371A (en) | 2020-11-20 | 2020-11-20 | Reliable and simple and easy electronic expansion valve of installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112283371A true CN112283371A (en) | 2021-01-29 |
Family
ID=74399380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011309447.9A Pending CN112283371A (en) | 2020-11-20 | 2020-11-20 | Reliable and simple and easy electronic expansion valve of installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112283371A (en) |
-
2020
- 2020-11-20 CN CN202011309447.9A patent/CN112283371A/en active Pending
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