CN214118991U - Sealing mechanism and electronic expansion valve - Google Patents
Sealing mechanism and electronic expansion valve Download PDFInfo
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- CN214118991U CN214118991U CN202022702310.1U CN202022702310U CN214118991U CN 214118991 U CN214118991 U CN 214118991U CN 202022702310 U CN202022702310 U CN 202022702310U CN 214118991 U CN214118991 U CN 214118991U
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- conical surface
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Abstract
The utility model discloses a sealing mechanism and electronic expansion valve, the sealing mechanism of this application embodiment includes: the valve comprises a valve port and a valve needle matched and connected with the valve port, wherein the valve port comprises a guide section and a liquid guide groove communicated with the guide section, the top of the liquid guide groove is provided with a first conical surface, and the valve needle is provided with a second conical surface matched with the first conical surface; when the valve needle is connected with the valve port, the axis of the valve needle is superposed with the axis of the valve port. This application improves the axiality of needle and valve port through mutually supporting between first conical surface and the second conical surface, reduces the internal leakage of valve from the design angle, guarantees refrigerating system's reliable steady operation.
Description
Technical Field
The utility model relates to an expansion valve technical field, in particular to sealing mechanism and electronic expansion valve.
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 electronic expansion valve generally realizes the hard sealing of the interior through the line contact of the valve needle and the valve port, when the electronic expansion valve is in a closed state, excessive refrigerant should not pass through between the valve needle and the valve port, and if the air pressure of 1Mpa is introduced into the inlet of the valve, the air flow rate of the outlet of the valve exceeds 300ml/min, internal leakage is formed. When internal leakage occurs, a large pressure difference exists between the front and the rear of the electronic expansion valve, and at the moment, the temperature of the throttled refrigerant is very low due to the small throttling aperture, so that equipment is damaged. For a water-cooled unit, a water-cooled evaporator is used, and a refrigerant with very low temperature after throttling can cause frost cracking of a heat exchange tube of the evaporator and leakage of the unit; and for the air-cooled unit, the air-cooled evaporator is used, so that obvious frosting phenomenon can be seen, and the unit has operation risk. The internal leakage is generally related to the surface roughness and roundness of the valve needle and the valve port sealing surface, which is determined by the part processing technology; and also on the coaxiality of the valve needle and the valve port, which is determined by the design. The existing structure generally separates the valve needle guide section from the valve port sealing circle, so that the coaxiality of the valve needle and the valve port is obviously reduced, and the internal leakage is obviously larger.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a sealing mechanism for an electronic expansion valve, which can reduce the internal leakage of the valve and ensure the reliable and stable operation of the refrigeration system.
A first aspect of embodiments of the present application provides a sealing mechanism, including: the valve comprises a valve port and a valve needle matched and connected with the valve port, wherein the valve port comprises a guide section and a liquid guide groove communicated with the guide section, the top of the liquid guide groove is provided with a first conical surface, and the valve needle is provided with a second conical surface matched with the first conical surface;
when the valve needle is connected with the valve port, the axis of the valve needle is superposed with the axis of the valve port.
Through the mutual cooperation between first conical surface and the second conical surface, improve the axiality of needle and valve port, reduce the internal leakage of valve from the design angle, guarantee refrigerating system's reliable steady operation.
In some embodiments, the valve port comprises brass.
Valve port part adopts the brass material, improves the leakproofness, reduces the processing degree of difficulty.
In some embodiments, the valve pin comprises stainless steel.
The valve needle adopts stainless steel material, is favorable to valve needle and brass valve port to form sealed combination.
A second aspect of the embodiments of the present application further provides an electronic expansion valve, including the above-mentioned sealing mechanism, where the sealing mechanism is disposed in the electronic expansion valve.
The sealing mechanism is arranged in the electronic expansion valve, so that the reliable and stable operation of the 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 needed to be 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 schematic structural view of the sealing mechanism of the present invention;
FIG. 2 is a schematic view of the valve port of the present invention;
fig. 3 is a schematic structural diagram of the valve needle of the present invention;
fig. 4 is a schematic structural view of the electronic expansion valve of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, 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 motion situation, etc. in a specific posture (as shown in the drawings), 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 implicit ly 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example one
As shown in fig. 1-3, the embodiment of the present application provides a sealing mechanism, which includes a valve port 11 and a valve needle 12 cooperatively connected with the valve port 11, where the valve port 11 includes a guiding section 111 and a liquid guiding groove 112 communicating with the guiding section 111, where a first tapered surface 113 is disposed at a top of the liquid guiding groove 112, and a second tapered surface 121 adapted to the first tapered surface 113 is disposed on the valve needle 12;
when the sealing mechanism is assembled, i.e. after the valve needle 12 is connected to the valve port 11, the axis of the valve needle 12 coincides with the axis of the valve port 11.
In this embodiment, the valve port 11 is made of brass, and the parts of the valve port 11 are made of brass, so that the sealing performance is improved, and the processing difficulty is reduced; the valve needle 12 is made of stainless steel, and the valve needle 12 is made of stainless steel, so that the valve needle 12 and the brass valve port 11 can form a sealing combination conveniently.
The utility model provides a sealing mechanism, this sealing mechanism improve the axiality of needle 12 and valve port 11 through mutually supporting between first conical surface 113 and the second conical surface 121, reduce the internal leakage of valve from the design angle, guarantee refrigerating system's reliable steady operation.
Example two
As shown in fig. 4, an electronic expansion valve according to an embodiment of the present invention includes the sealing mechanism 10 and a valve body 20, and the sealing mechanism 10 is installed in the valve body 20 through a valve seat 23.
In this embodiment, the valve seat 23 is made of stainless steel, so that the structure is simplified and the valve seat is only used for fixed connection.
In a specific application, after the electronic expansion valve is connected to a refrigeration system, a refrigerant enters the valve body 20 from the valve body inlet 21, enters the valve port 11 through the valve port flow channel, and finally enters the valve body outlet 22 from a through-flow section formed by the valve needle 12 and the valve port 11. Therefore, when the electronic expansion valve is completely closed, the refrigerant can only flow into the outlet of the valve body from the O-ring and the sealing line between the valve needle 12 and the valve port 11. The first conical surface 113 at the top of the liquid guide groove 112 and the second conical surface 121 on the valve needle 12 are in hard contact to realize sealing at a sealing line close to the small diameter of the conical surfaces, so the surface roughness and roundness of the first conical surface 113 and the second conical surface 121 directly influence the sealing effect, and the coaxiality of the valve needle 12 and the sealing line of the valve port 11 also directly influence the sealing effect; if the coaxiality is not good, the sealing line of the needle 12 with the port 11 will not achieve complete circular contact, and the internal leakage of the valve will increase significantly. The coaxiality of the guide section 111 and the liquid guide groove 112 is directly ensured by processing, and similarly, the coaxiality of the valve needle 12 is also directly ensured by processing; then the valve port sealing line and the valve needle sealing line are coaxial by guiding the valve needle through the valve port guiding section, so that the internal leakage is reduced, and the reliable operation of a refrigeration system is ensured. On the other hand, put the brass valve port of easy processing with the direction section on, reduce the processing degree of difficulty of stainless steel disk seat, reduce the processing cost of part, improve the competitiveness of product.
According to the electronic expansion valve, the sealing mechanism is arranged in the electronic expansion valve, so that 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.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (4)
1. A seal mechanism, comprising: the valve comprises a valve port and a valve needle matched and connected with the valve port, wherein the valve port comprises a guide section and a liquid guide groove communicated with the guide section, the top of the liquid guide groove is provided with a first conical surface, and the valve needle is provided with a second conical surface matched with the first conical surface;
when the valve needle is connected with the valve port, the axis of the valve needle is superposed with the axis of the valve port.
2. The seal mechanism of claim 1, wherein the valve port comprises brass.
3. The seal mechanism of claim 1, wherein the valve needle comprises stainless steel.
4. An electronic expansion valve comprising a sealing mechanism according to any of claims 1-3, arranged within the electronic expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022702310.1U CN214118991U (en) | 2020-11-20 | 2020-11-20 | Sealing mechanism and electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022702310.1U CN214118991U (en) | 2020-11-20 | 2020-11-20 | Sealing mechanism and electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214118991U true CN214118991U (en) | 2021-09-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022702310.1U Active CN214118991U (en) | 2020-11-20 | 2020-11-20 | Sealing mechanism and electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214118991U (en) |
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2020
- 2020-11-20 CN CN202022702310.1U patent/CN214118991U/en active Active
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