CN218954035U - Sealing structure and thermal expansion valve - Google Patents
Sealing structure and thermal expansion valve Download PDFInfo
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- CN218954035U CN218954035U CN202222210727.5U CN202222210727U CN218954035U CN 218954035 U CN218954035 U CN 218954035U CN 202222210727 U CN202222210727 U CN 202222210727U CN 218954035 U CN218954035 U CN 218954035U
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- 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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The application relates to a sealing structure and a thermal expansion valve, in particular to a sealing structure which comprises an elastic sealing piece, an assembly component and a movable component. One end of the elastic sealing element is connected with the assembly component, the other end of the elastic sealing element is in sealing fit with the movable component, the movable component can relatively move along the preset direction relative to the elastic sealing element, and the compression rate a of the elastic sealing element is 10 percent < a is less than or equal to 30 percent. The sealing structure and the thermal expansion valve provided by the application solve the problems that the sealing effect of the existing sealing structure is poor and the reliability is low.
Description
Technical Field
The application relates to the technical field of sealing, in particular to a sealing structure and a thermal expansion valve.
Background
In sealed technical field, current seal structure, sealed effect is relatively poor and the reliability is lower. Taking a thermal expansion valve as an example, a valve body of the thermal expansion valve and a pressing block are enclosed to form a sealing ring assembly groove. The pressing block presses the sealing ring too deeply to cause severe extrusion of the sealing ring, so that the friction resistance between the sealing ring and the outer wall of the transmission rod is large, and the sensitivity of the thermal expansion valve is reduced. The pressing block is pressed into the thermal expansion valve too shallow, so that the sealing ring cannot be subjected to enough elastic deformation, and the sealing effect of the thermal expansion valve is poor.
Disclosure of Invention
Based on this, it is necessary to provide a sealing structure and a thermal expansion valve, so as to improve the sealing effect of the existing sealing structure and improve the reliability of the sealing structure.
Specifically, the sealing structure that this application provided includes elastic sealing element, assembly subassembly and movable component, and assembly subassembly is connected to elastic sealing element one end, and the other end and movable component sealing fit, movable component can take place relative movement along the direction of predetermineeing for elastic sealing element, and elastic sealing element's compressibility a satisfies, 10% < a is less than or equal to 30%.
In one embodiment, the movable assembly is provided with a movable cavity, the assembly is movably arranged in the movable cavity, the outer side of the assembly is provided with an assembly groove, and the elastic sealing element is sleeved in the assembly groove and is tightly matched with the inner wall of the movable cavity. It can be appreciated that such arrangement is advantageous for installation of the elastic sealing member, and can prevent the elastic sealing member from moving along a preset direction, thereby improving assembly stability of the elastic sealing member.
In one embodiment, the cross-sectional shape of the resilient seal disposed within the mounting groove is the same as the cross-sectional shape of the mounting groove. It can be understood that the elastic sealing element is arranged in such a way, deformation such as torsion and the like after the elastic sealing element is subjected to the action of external force is effectively avoided, and the assembly stability of the elastic sealing element is improved.
In one embodiment, the fitting groove has a depth r 1 The width of the elastic sealing element along the depth direction of the assembly groove is r 2 Satisfy 1.2 < r 2 /r 1 < 1.4. It will be appreciated that by such an arrangement, difficulties in mating the assembly and the movable assembly due to excessive friction between the resilient seal and the inner wall of the movable assembly can be avoided.
In one embodiment, the inner end surface of the elastic seal member is spaced apart from the bottom wall of the fitting groove. It can be understood that the arrangement is that the assembly component can not drive the elastic sealing element to be eccentric together, so that the problem that one end of the elastic sealing element is too large in hysteresis and the other end of the elastic sealing element is easy to leak is effectively prevented.
In one of the embodiments, the height h of the fitting groove in the preset direction is defined before the elastic sealing member is fitted into the fitting groove 1 Height h of the elastic sealing member along the preset direction 2 Satisfy h 1 ＞h 2 . It will be appreciated that so arranged, the resilient seal may roll slightly, thereby avoiding hysteresis in the seal arrangement.
In one embodiment, the connection between the bottom wall of the assembly groove and the side wall of the assembly groove is provided with a first arc transition section, and it is understood that, by this arrangement, stress concentration at the connection between the bottom wall of the assembly groove and the side wall of the assembly groove can be avoided.
In one embodiment, the opening of the assembly groove faces the movable assembly, and a second arc transition section is arranged at the opening of the assembly groove. It will be appreciated that this arrangement avoids scratching the elastomeric seal when the seal is assembled.
In one embodiment, the elastic sealing member is made of one of nitrile rubber, hydrogenated nitrile rubber, silicone rubber or fluororubber. It will be appreciated that nitrile rubber and silicone rubber have good wear resistance and can increase the service life of the elastomeric seals. The hydrogenated nitrile rubber has good heat resistance so that the elastomeric seals can maintain good service performance at high temperatures.
The present application also provides a thermal expansion valve comprising a sealing arrangement as described in any one of the embodiments above. The valve body and the transmission rod can relatively move along a preset direction, part of the valve body forms a movable assembly, and part of the transmission rod forms an assembly. It will be appreciated that this arrangement simplifies the construction of the thermostatic expansion valve and simplifies the installation procedure of the thermostatic expansion valve.
In the sealing structure provided by the application, the compressed elastic sealing element is elastically deformed, and contact pressure is generated on the contact surface of the elastic sealing element and the movable assembly. The compression rate a of the elastic sealing element is set to be 10 percent < a is less than or equal to 30 percent, so that the contact pressure generated on the contact surface of the elastic sealing element and the movable assembly is larger than the internal pressure of a sealed medium, thereby avoiding the leakage of the sealed medium and improving the sealing effect of the sealing structure. And, so set up, can avoid the contact pressure that produces on the contact surface of elastic sealing member and movable assembly too big, and then avoid elastic sealing member to take place permanent deformation to seal structure's stability has been improved.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a cross-sectional view of a seal structure of an embodiment provided herein;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;
FIG. 3 is a cross-sectional view of a fitting assembly and elastomeric seal of an embodiment provided herein;
FIG. 4 is a cross-sectional view I of a thermal expansion valve according to an embodiment provided herein;
fig. 5 is a schematic diagram of the working principle of the thermal expansion valve shown in fig. 4.
Reference numerals: 1. assembling the assembly; 11. an assembly groove; 12. a fit gap; 13. a first arc transition section; 14. a second arc transition section; 2. a movable assembly; 21. a movable cavity; 3. an elastic seal; 4. a valve body; 41. a valve cavity; 42. a first interface; 43. a second interface; 5. a transmission rod; 6. a drive assembly; 61. a film cover is arranged; 62. a lower film cover; 64. an upper chamber; 65. a lower chamber; 66. a transmission block; 68. a membrane; 7. a valve core assembly; 71. a valve stem; 72. a valve head seat; 8. an adjustment assembly; 81. an adjusting bolt; 82. an adjusting spring; 9. a base; 10. and (3) capping.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.
In sealed technical field, current seal structure, sealed effect is relatively poor and the reliability is lower. Taking a thermal expansion valve as an example, a valve body of the thermal expansion valve and a pressing block are enclosed to form a sealing ring assembly groove. The pressing block presses the sealing ring too deeply, so that the sealing ring is severely extruded, and the friction resistance between the sealing ring and the outer wall of the transmission rod is larger, so that the sensitivity of the thermal expansion valve is reduced. The pressing block is pressed into the thermal expansion valve too shallow, so that the sealing ring cannot be subjected to enough elastic deformation, and the sealing effect of the thermal expansion valve is poor.
In order to improve the sealing effect of the existing sealing structure and improve the reliability of the sealing structure, the application provides a sealing structure and a thermal expansion valve. Specifically, referring to fig. 1, the sealing structure includes an elastic sealing member 3, an assembly 1 and a movable assembly 2, wherein one end of the elastic sealing member 3 is connected with the assembly 1, the other end is in sealing fit with the movable assembly 2, the movable assembly 2 can relatively move along a preset direction relative to the elastic sealing member 3, and the compression rate a of the elastic sealing member 3 is 10% < a less than or equal to 30%.
It should be noted that, "fitting assembly 1" means: the assembly for assembling the elastic sealing member 3, the assembly 1 may be fixed or movable. Likewise, "movable assembly 2" refers to: the movable assembly 2 may be fixed or movable with respect to the flexible seal 3.
The compressed elastic sealing member 3 is elastically deformed and a contact pressure is generated on the contact surface of the elastic sealing member 3 with the movable assembly 2. By setting the compression rate a of the elastic sealing element 3 to be 10% < a < 30%, the contact pressure generated on the contact surface of the elastic sealing element 3 and the movable assembly 2 is larger than the internal pressure of the sealed medium, thereby avoiding leakage of the sealed medium and improving the sealing effect of the sealing structure. Moreover, by the arrangement, the overlarge contact pressure generated on the contact surface of the elastic sealing element 3 and the movable assembly 2 can be avoided, and further, the elastic sealing element 3 is prevented from being permanently deformed, so that the stability of the sealing structure is improved.
In summary, the sealing structure provided by the application solves the problems that the sealing effect of the existing sealing structure is poor and the stability is low.
In one embodiment, as shown in fig. 1, the movable assembly 2 is provided with a movable cavity 21, the assembly 1 is movably arranged in the movable cavity 21, the outer side of the assembly 1 is provided with an assembly groove 11, and the elastic sealing element 3 is sleeved in the assembly groove 11 and is tightly matched with the inner wall of the movable cavity 21.
By arranging the assembly groove 11, the installation of the elastic sealing element 3 is facilitated, the elastic sealing element 3 can be prevented from moving along the preset direction, and the assembly stability of the elastic sealing element 3 is improved. Meanwhile, the compression rate of the elastic sealing element 3 can reach a preset value through the shape or size design of the elastic sealing element 3 and the assembly groove 11, so that the stability of the sealing structure is improved.
Further, in an embodiment, the cross-sectional shape of the elastic sealing member 3 installed in the fitting groove 11 is the same as the cross-sectional shape of the fitting groove 11.
In order to ensure that the elastic sealing element 3 fitted into the fitting groove 11 has a reasonable amount of compression, i.e. in order to allow a sufficient elastic deformation of the compressed elastic sealing element 3, the elastic sealing element 3 is in an interference fit with the fitting groove 11. The elastic sealing member 3 is partially installed in the fitting groove 11, and the other part protrudes from the opening of the fitting groove 11. Wherein, install the cross section shape of the elastic sealing member 3 in the assembly groove 11 the same with the cross section shape of assembly groove 11, so for the elastic sealing member 3 is more inseparable with the inner wall laminating of assembly groove 11 to, effectively avoided elastic sealing member 3 to take place deformation such as torsion after receiving the exogenic action, and then improved elastic sealing member 3's assembly stability.
Further, in an embodiment, the cross section of the fitting groove 11 is rectangular, and correspondingly, the cross section of the elastic sealing member 3 installed in the fitting groove 11 is rectangular. The rectangular fitting groove 11 is easy to process.
But not limited thereto, the cross-sectional shape of the fitting groove 11 and the cross-sectional shape of the elastic seal member 3 fitted in the fitting groove 11 may be other forms, and in another embodiment, the cross-section of the fitting groove 11 is V-shaped, and correspondingly, the cross-section of the elastic seal member 3 fitted in the fitting groove 11 is V-shaped. In another embodiment, the cross section of the fitting groove 11 is U-shaped, and correspondingly, the cross section of the elastic sealing member 3 installed in the fitting groove 11 is U-shaped. Not specifically listed here.
In one embodiment, as shown in FIG. 2, the fitting groove 11 has a depth r 1 The width of the elastic sealing member 3 along the depth direction of the assembly groove 11 is r 2 Satisfy 1.2 < r 2 /r 1 ＜1.4。
R is as follows 2 The width of the elastic sealing member 3 after being installed in the installation groove 11 along the depth direction of the installation groove 11 is r 2 I.e. the width of the elastic seal 3 after compression.
By providing r, since there is a fit gap 12 between the fitting assembly 1 and the movable assembly 2 2 /r 1 >1.2, which is beneficial to improving the matching tightness degree of the elastic sealing element 3 and the inner wall of the movable component 2. Further, by setting r 2 /r 1 And less than 1.4, the difficulty in matching the assembly component 1 and the movable component 2 caused by excessive friction force between the elastic sealing element 3 and the inner wall of the movable component 2 can be avoided.
In one embodiment, as shown in fig. 1 and 2, the inner end face of the elastic sealing member 3, which is the most extreme end face of the elastic sealing member 3 near the bottom wall of the fitting groove 11, is disposed at a distance from the bottom wall of the fitting groove 11. That is, a gap is formed between the elastic seal member 3 and the bottom wall of the fitting groove 11 without abutting. If the elastic sealing element 3 and the groove bottom of the fitting groove 11 areThe abutment of the walls, when the assembly 1 is eccentric in the movable chamber 21, can cause excessive extrusion of one side of the elastic sealing element 3 and insufficient adhesion of the other side to the inner wall of the movable chamber 21. A large frictional resistance is generated between the excessively pressed side of the elastic sealing member 3 and the inner wall of the movable chamber 21, thereby causing excessive delay of the sealing structure, and leakage of the sealed medium easily occurs on the other side of the elastic sealing member 3. And when the interval setting of the medial surface of elastic seal 3 and assembly groove 11 diapire, promptly the elastic seal 3 does not butt with between the tank bottom wall of assembly groove 11 for when assembly component 1 takes place eccentrically in movable chamber 21, the clearance between the medial surface of elastic seal 3 and the assembly groove 11 diapire can provide certain eccentric movement space for assembly component 1, so, assembly component 1 can not drive elastic seal 3 together eccentric, and then effectively prevented that elastic seal 3 one end from lagging too big, the problem that the other end takes place to leak easily. In one embodiment, the height h of the fitting groove 11 in the preset direction is defined before the elastic sealing member 3 is fitted into the fitting groove 11 1 Height h of the elastic sealing member 3 along the preset direction 2 Satisfy h 1 ＞h 2 。
H is the same as that of the 2 Refers to the height h along the preset direction in the uncompressed free state before the elastic sealing member 3 is installed in the installation groove 11 2 。
In general, the elastic sealing member 3 is made of rubber, and the rubber is not plastically deformed, so that when the elastic sealing member 3 is assembled in the movable cavity 21, the elastic sealing member 3 is elastically sprung back in a predetermined direction, that is, the thickness of the elastic sealing member 3 increases in the predetermined direction when the elastic sealing member 3 is radially pressed by the cavity wall of the movable cavity 21 in the assembly groove 11. By setting h 1 ＞h 2 The fitting groove 11 reserves a sufficient space for the elastic sealing member 3 along a predetermined direction to accommodate elastic deformation of the elastic sealing member 3.
Of course, in other embodiments h 1 Less than h 2 The elastic sealing member 3 may be pressed in a predetermined direction. May also be h 1 Equal to h 2 The elastic sealing member 3 is radially deformed by compression. As long as the elastic sealing member 3The size and the size of the fitting groove 11 are matched so that the elastic sealing member 3 reaches a predetermined deformation amount.
In one embodiment, as shown in fig. 3, a first arc transition section 13 is provided at the connection between the bottom wall of the fitting groove 11 and the side wall of the fitting groove 11. This arrangement prevents stress concentration at the junction of the bottom wall of the fitting groove 11 and the side wall of the fitting groove 11.
Further, in one embodiment, the first circular arc transition 13 is rounded, and the radius r of the rounded corner 3 Satisfies r of 0.3mm less than or equal to 3 ≤1mm。
In an embodiment, as shown in fig. 3, the opening of the assembly groove 11 faces the movable assembly 2, and a second arc transition section 14 is provided at the opening of the assembly groove 11. By this arrangement, the elastic sealing member 3 is prevented from being scratched when the sealing structure is assembled.
Further, in an embodiment, the second rounded transition 14 is rounded and the radius r of the rounded corner 4 Satisfies r of 0.1mm less than or equal to 4 ≤0.2mm。
In one embodiment, the material of the elastic sealing member 3 is one of nitrile rubber, hydrogenated nitrile rubber, silicone rubber or fluoro-rubber. Wherein the wear resistance of the nitrile rubber and the silicone rubber is good, and the service life of the elastic sealing element 3 can be prolonged. The hydrogenated nitrile rubber has good heat resistance so that the elastomeric seal 3 can maintain good service properties under high temperature conditions.
Referring to fig. 4-5, the present application further provides a thermal expansion valve, which includes a valve body 4, a transmission rod 5, and a sealing structure as described in any of the above embodiments. The valve body 4 and the transmission rod 5 can relatively move along a preset direction, part of the valve body 4 forms the movable assembly 2, and part of the transmission rod 5 forms the assembly 1.
The thermal expansion valve is arranged between the liquid storage cylinder and the evaporator and is used for realizing pressure drop from condensing pressure to evaporating pressure. Specifically, a valve cavity 41 is arranged in a valve body 4 of the thermal expansion valve, a transmission rod 5 is movably arranged in the valve cavity 41, an assembly groove 11 is formed in the outer side of the transmission rod 5, and an elastic sealing element 3 is sleeved in the assembly groove 11 and is tightly matched with the inner wall of the valve cavity 41. By the arrangement, the structure of the thermal expansion valve is simplified, and the installation procedure of the thermal expansion valve is simplified.
The installation process of the thermal expansion valve is as follows: first, the elastic sealing member 3 is fitted into the fitting groove 11, and then the transmission rod 5 is fitted into the valve body 4.
By designing the size of the matching assembly groove 11 and the size of the elastic sealing element 3, the compression rate a of the elastic sealing element 3 is satisfied and is 10% < a less than or equal to 30%, so that the sealing effect of the thermal expansion valve is improved, and the reliability of the external balance and internal leakage of the expansion valve is ensured.
As shown in fig. 4, the thermal expansion valve provided by the present application includes a drive assembly 6, a valve core assembly 7, and a regulating assembly 8. The valve body 4 is provided with a first interface 42 and a second interface 43 for inflow and outflow of the refrigerant, respectively, and one end of the valve core assembly 7 is connected with the driving assembly 6, and the other end is connected with the adjusting assembly 8. The drive assembly 6 and the adjustment assembly 8 apply opposing forces to the valve spool assembly 7 to maintain the proper opening of the orifice.
The driving assembly 6 includes a housing formed by enclosing an upper membrane cover 61 and a lower membrane cover 62, a diaphragm 68 is provided in the housing, and the diaphragm 68 divides an inner space of the housing into an upper chamber 64 and a lower chamber 65. The upper chamber 64 communicates with the evaporator inlet through a capillary tube and a bulb, and the lower chamber 65 communicates with the evaporator outlet through a balance tube. The diaphragm 68 is provided with a transmission block 66 and a transmission rod 5 at one side end surface of the lower cavity 65, and the force exerted by the diaphragm 68 is transmitted to the valve core assembly 7 through the transmission block 66 and the transmission rod 5.
The valve core assembly 7 comprises a valve rod 71 and a valve head seat 72, wherein one end of the valve rod 71 is fixedly connected with the transmission rod 5, and the other end of the valve rod is in sealing fit with the valve head seat 72 through a sealing ring.
The adjusting assembly 8 includes an adjusting bolt 81 abutting against the valve head seat 72 and an adjusting spring 82 fitted over the outer side of the adjusting bolt 81. One end of the adjusting spring 82 is fixedly connected with the adjusting bolt 81, and the other end is abutted against the valve rod 71. The adjusting bolt 81 is sleeved in the base 9, and the cover cap 10 is sleeved outside the base 9 to protect the adjusting bolt 81 from being touched by mistake.
The working principle of the thermal expansion valve is shown in fig. 5:
temperature sensing bulb and its making methodThe refrigerant lines are in intimate contact to sense the superheated vapor temperature at the evaporator inlet and transfer the saturated pressure at that temperature to the upper chamber 64 above the diaphragm 68 in the thermostatic expansion valve and apply a downward pressure F to the diaphragm 68 c The refrigerant at the evaporator outlet applies an upward pressure F to the diaphragm 68 through the balance tube e The regulating spring 82 applies an upward force F to the valve element assembly 7 s . The three forces are balanced to maintain the proper opening of the orifice.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.
Claims (10)
1. The utility model provides a seal structure, its characterized in that includes elastic sealing element (3), assembly subassembly (1) and movable subassembly (2), elastic sealing element (3) one end is connected assembly subassembly (1), the other end with movable subassembly (2) sealing fit, movable subassembly (2) can be relative elastic sealing element (3) take place relative movement along predetermineeing the direction, the compressibility a of elastic sealing element (3) satisfies, 10% < a is less than or equal to 30%.
2. The sealing structure according to claim 1, wherein the movable assembly (2) is provided with a movable cavity (21), the assembly (1) is movably arranged in the movable cavity (21), an assembly groove (11) is arranged on the outer side of the assembly (1), and the elastic sealing element (3) is sleeved in the assembly groove (11) and is tightly matched with the inner wall of the movable cavity (21).
3. A sealing arrangement according to claim 2, characterized in that the cross-sectional shape of the elastic sealing element (3) fitted in the fitting groove (11) is identical to the cross-sectional shape of the fitting groove (11).
4. The sealing structure according to claim 2, characterized in that the fitting groove (11) has a depth r 1 The width of the elastic sealing element (3) along the depth direction of the assembly groove (11) is r 2 Satisfy 1.2 < r 2 /r 1 ＜1.4。
5. The sealing structure according to claim 2, characterized in that the inner end face of the elastic sealing member (3) is disposed at a distance from the bottom wall of the fitting groove (11).
6. A sealing arrangement according to claim 2, characterized in that the height h of the fitting groove (11) in the preset direction is defined before the elastic sealing element (3) is fitted into the fitting groove (11) 1 The height h of the elastic sealing element (3) along the preset direction 2 Satisfy h 1 ＞h 2 。
7. The sealing structure according to claim 2, characterized in that the junction of the bottom wall of the fitting groove (11) and the side wall of the fitting groove (11) is provided with a first circular arc transition section (13).
8. The sealing structure according to claim 2, characterized in that the opening of the fitting groove (11) is directed towards the movable assembly (2), and that the opening of the fitting groove (11) is provided with a second circular arc transition section (14).
9. The sealing structure according to claim 1, wherein the material of the elastic sealing member (3) is one of nitrile rubber, hydrogenated nitrile rubber, silicone rubber or fluoro-rubber.
10. A thermal expansion valve, characterized by comprising a valve body (4), a transmission rod (5) and a sealing structure according to any one of claims 1-9, wherein the valve body (4) and the transmission rod (5) can relatively move along a preset direction, a part of the valve body (4) forms the movable assembly (2), and a part of the transmission rod (5) forms the assembly (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222210727.5U CN218954035U (en) | 2022-08-22 | 2022-08-22 | Sealing structure and thermal expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222210727.5U CN218954035U (en) | 2022-08-22 | 2022-08-22 | Sealing structure and thermal expansion valve |
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| Publication Number | Publication Date |
|---|---|
| CN218954035U true CN218954035U (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222210727.5U Active CN218954035U (en) | 2022-08-22 | 2022-08-22 | Sealing structure and thermal expansion valve |
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| CN (1) | CN218954035U (en) |
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