CN113833849A - Metal gasket for diamond pressure cavity high-temperature and high-pressure experiment and manufacturing method thereof - Google Patents
Metal gasket for diamond pressure cavity high-temperature and high-pressure experiment and manufacturing method thereof Download PDFInfo
- Publication number
- CN113833849A CN113833849A CN202010592716.0A CN202010592716A CN113833849A CN 113833849 A CN113833849 A CN 113833849A CN 202010592716 A CN202010592716 A CN 202010592716A CN 113833849 A CN113833849 A CN 113833849A
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- China
- Prior art keywords
- metal gasket
- mold
- diamond
- gasket
- sealing ring
- 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.)
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- 239000002184 metal Substances 0.000 title claims abstract description 68
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 68
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 39
- 239000010432 diamond Substances 0.000 title claims abstract description 39
- 238000002474 experimental method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims description 12
- 239000003566 sealing material Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 238000010329 laser etching Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 230000008569 process Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/28—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention provides a metal gasket for a diamond pressure cavity high-temperature and high-pressure experiment and a manufacturing method thereof. The sealing structure is arranged on the periphery of the through hole on the front side and the back side of the metal gasket, when the metal gasket is in actual use, the sealing ring in the sealing structure can be in sealing contact with the diamond anvil cell, leakage at the joint face is avoided, and the success rate of an experiment is greatly improved.
Description
Technical Field
The invention relates to the technical field of diamond pressure cavities, in particular to a metal gasket for a high-temperature and high-pressure experiment of a diamond pressure cavity and a manufacturing method thereof.
Background
In recent decades, the diamond pressure chamber (DAC) technology has been widely used in the research field of high temperature and high pressure experiments, and can reach 550GP pressure and 6000K temperature. Compared with other static high pressure experimental techniques (large press, high pressure kettle, etc.), the diamond pressure cavity has unique advantages, and not only can be used for researching the structural properties, phase change, state equation, etc. of substances under extreme temperature and pressure conditions, but also can be used for in-situ observation of the whole experimental process.
The key point of success of the experiment is that pressure leakage cannot occur between the diamond anvil cell and the metal gasket in the experiment process, the requirement on sample feeding and sample loading of the experiment is very high, the leakage can occur on a joint surface due to unevenness and slight pressure imbalance difference which cannot be detected by naked eyes, the original balance system is broken, and the experiment failure is caused. The success rate of high-temperature and high-pressure experiments of the diamond pressure cavity in the actual operation process is low and is generally lower than 10%.
Therefore, a high-efficiency and safe metal gasket needs to be designed, so that the effect of preventing the contact surface of the anvil and the metal gasket from being leaked by the diamond under the conditions of high temperature and high pressure is achieved, the success rate of an experiment is improved, the safety coefficient is improved, and the working efficiency and the time saving cost are greatly increased.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides the metal gasket for the diamond pressure cavity high-temperature and high-pressure experiment and the manufacturing method thereof, and the sealing ring is formed on the metal gasket, so that the sealing performance of the contact surface can be ensured when the diamond anvil cell is matched.
The metal gasket for the diamond pressure cavity high-temperature and high-pressure experiment comprises a gasket body, wherein a through hole used as a sample cavity is formed in the center of the gasket body, sealing structures are arranged on the front surface and the back surface of the gasket body, each sealing structure comprises a sealing ring groove and a sealing ring arranged in the sealing ring groove, the sealing ring grooves surround the periphery of the through hole and are concentric with the through hole, and the sealing rings are higher than the surface of the gasket body.
In one embodiment, the material of the sealing ring is gold with purity of 999 per mill.
In one embodiment, the seal ring has an inner diameter greater than the diameter of the through hole and an outer diameter less than the diameter of the anvil surface of the diamond anvil of the diamond pressure chamber.
The invention also provides a manufacturing method of the metal gasket, which comprises the following steps:
step one, processing a raw material metal sheet into a metal sheet with reduced thickness, and cutting the metal sheet to obtain a metal gasket;
step two, processing a through hole in the center of the metal gasket;
step three, respectively processing sealing ring grooves on the front surface and the back surface of the metal gasket;
fourthly, installing a mold at the sealing ring groove on the surface of one side of the metal gasket, melting the sealing material, injecting the melted sealing material into a molding cavity formed by the sealing ring groove and the mold, and cooling and solidifying the sealing material in the molding cavity to form a sealing ring;
and step five, machining a sealing ring on the surface of the other side of the metal gasket by adopting the same method as the step four.
In one embodiment, the raw metal sheet is processed into the metal sheet by rolling.
In one embodiment, the through hole is formed by stamping.
In one embodiment, the seal ring groove is machined by laser etching.
In one embodiment, in step four, after the seal ring is formed, the mold is removed and the top of the seal ring is polished flat.
In one embodiment, the mold comprises an inner mold and an outer mold, an annular gap with the same shape and size as the seal ring groove is arranged between the inner mold and the outer mold, and the annular gap and the inner space of the seal ring groove form the molding cavity.
In one embodiment, the mold is made of the same material as the metal gasket.
The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.
Compared with the prior art, the metal gasket for the diamond pressure cavity high-temperature and high-pressure experiment and the manufacturing method thereof provided by the invention at least have the following beneficial effects:
the metal gasket is provided with the sealing rings on the surfaces of the front surface and the back surface, and the sealing rings can be in close contact with the diamond anvil blocks in the diamond pressure cavity during actual experiments, so that the sealing performance of the contact surfaces is ensured, the sealing performance of the through holes serving as sample cavities is realized, the problem of leakage of the sample cavities in the experiment process is effectively avoided, and the success rate of the experiments is improved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 shows a top view of the structure of a metal gasket of the present invention;
FIG. 2 shows a schematic structural view of a cross section of a metal gasket of the present invention;
FIG. 3 shows a schematic view of the overall structure of the actual mating of the metal shim and the diamond anvil according to the present invention;
FIG. 4 shows a flow chart of a manufacturing method of the present invention;
in the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
Reference numerals:
1-a gasket body, 2-a through hole, 3-a sealing structure, 31-a sealing ring, 32-a sealing ring groove, 4-a diamond anvil, 41-an upper anvil and 42-a lower anvil.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 and 2 of the accompanying drawings, the metal gasket for the diamond pressure cavity high-temperature and high-pressure experiment comprises a gasket body 1, a through hole 2 serving as a sample cavity is formed in the center of the gasket body 1, sealing structures 3 are arranged on the front surface and the back surface of the gasket body 1, each sealing structure 3 comprises a sealing ring groove 32 and a sealing ring 31 arranged in the sealing ring groove 32, the sealing ring groove 32 surrounds the periphery of the through hole 2 and is concentric with the through hole 2, and the sealing ring 31 is higher than the surface of the gasket body 1.
Specifically, the state of the metal gasket in actual use is as shown in fig. 3 of the accompanying drawings, and the diamond anvil 4 includes an upper anvil 41 and a lower anvil 42. When the gasket body 1 is used, the gasket body 1 is placed on the anvil surface at the top of the lower anvil 42, the center of the sealing ring 31 is concentric with the center of the top surface of the lower anvil 42, then under the action of an external pressure device, the upper anvil 41 moves downwards to be matched with the lower anvil 42 to clamp the gasket body 1, the anvil surfaces of the upper anvil 41 and the lower anvil 42 are respectively in close contact with the sealing rings 31 on the front side and the back side of the gasket body 1, the sealing of the contact surfaces is realized, and the sealing performance of the through hole 2 serving as a sample cavity is further maintained.
It should be noted that the seal ring 31 is higher than the surface of the gasket body 1 so as to be in close contact with the diamond anvil 4, and the material used for the seal ring 31 needs to have a certain deformation capability, and since the seal ring 31 is in contact with the solution under high temperature and high pressure in the actual experiment process, the seal ring is generally made of a metal material with stable properties. Meanwhile, the height of the sealing ring 31 higher than the surface of the gasket body 1 should not be too large, so that the sealing ring is slightly higher than the surface of the gasket body 1.
Preferably, the material of the sealing ring 31 is gold with the purity of 999 per mill. Gold has very good thermal conductivity, ductility and metal inertness, its melting point is high and it does not react substantially with most solutions. And due to good ductility, the diamond anvil can be better attached to the metal gasket under the high-temperature and high-pressure environment to play a role of a metal sealing ring.
In one embodiment, the seal ring 31 has an inner diameter greater than the diameter of the through hole 2 and an outer diameter less than the anvil surface diameter of the diamond anvil 4 of the diamond press chamber.
Specifically, as shown in fig. 4, the seal ring 31 is located between the through hole 2 and the outer edge of the diamond anvil 4, so that the anvil surface of the diamond anvil 4 can have good contact with the seal ring 31, thereby ensuring the sealing performance of the contact surface.
The manufacturing method of the metal gasket comprises the following steps:
step one, rolling a raw material metal sheet into a metal sheet with reduced thickness, and cutting the metal sheet to obtain a metal gasket; the shape of the metal sheet is random, but the size of the metal sheet needs to be larger than that of the diamond anvil cell adopted by the diamond pressing cavity.
Secondly, punching a through hole in the center of the metal gasket;
thirdly, laser etching is respectively adopted to process sealing ring grooves on the front surface and the back surface of the metal gasket;
fourthly, installing a mold at the sealing ring groove on the surface of one side of the metal gasket, injecting the sealing material into a forming cavity formed by the sealing ring groove and the mold after melting, cooling and solidifying the sealing material in the forming cavity to form a sealing ring, taking down the mold, polishing the top of the sealing ring to be flat, and enabling the top of the polished sealing ring to be slightly higher than the surface of the metal gasket;
and step five, machining a sealing ring on the surface of the other side of the metal gasket by adopting the same method as the step four.
In the first step, the metal sheet is cut into any shape, and the size of the metal sheet is larger than the size of an anvil surface of a diamond anvil cell adopted by a diamond pressing cavity.
The other specific machining means can be selected adaptively according to actual conditions, but laser etching is basically adopted for machining the sealing ring groove on the metal gasket, and the conventional machining means is difficult to implement due to the fact that the size and the thickness of the metal gasket are small.
In one embodiment, the mold comprises an inner mold and an outer mold, an annular gap with the same shape and size as the seal ring groove is formed between the inner mold and the outer mold, and the annular gap and the inner space of the seal ring groove form a molding cavity.
Specifically, the annular gap is located above the inner space of the seal ring groove, and the part of the seal ring higher than the surface of the metal gasket is formed. The mould can be reused.
Preferably, the material used for the mold is the same as the material used for the metal gasket. The two have the same physical and chemical properties, which is beneficial to the forming of the sealing ring, for example, the expansion coefficients of the two are the same, the expansion degrees of the die and the metal gasket caused by injecting the melted high-temperature sealing material into the forming cavity are the same, and the forming shape and the structure of the sealing ring cannot be changed because of the different expansion degrees.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. The utility model provides a diamond pressure chamber metal gasket for high temperature and high pressure experiments, a serial communication port, including the gasket body, the through-hole that is used as the sample chamber is seted up at the center of gasket body, all be provided with seal structure on the tow sides of gasket body, seal structure is in including sealed annular with the setting sealing washer in the sealed annular, the sealed annular encircle in the periphery of through-hole and with the through-hole is concentric, the sealing washer is higher than the surface of gasket body.
2. The metal gasket for the diamond pressure chamber high-temperature and high-pressure experiment as claimed in claim 1, wherein the sealing ring is made of gold with the purity of 999% o.
3. The metal gasket for diamond pressure chamber high temperature and high pressure experiment as claimed in claim 1, wherein the inner diameter of the sealing ring is larger than the diameter of the through hole, and the outer diameter is smaller than the diameter of the anvil surface of the diamond anvil cell of the diamond pressure chamber.
4. A method for manufacturing a metal gasket for a diamond pressure chamber high temperature and high pressure experiment according to any one of claims 1 to 3, which comprises the following steps:
step one, processing a raw material metal sheet into a metal sheet with reduced thickness, and cutting the metal sheet to obtain a metal gasket;
step two, processing a through hole in the center of the metal gasket;
step three, respectively processing sealing ring grooves on the front surface and the back surface of the metal gasket;
fourthly, installing a mold at the sealing ring groove on the surface of one side of the metal gasket, melting the sealing material, injecting the melted sealing material into a molding cavity formed by the sealing ring groove and the mold, and cooling and solidifying the sealing material in the molding cavity to form a sealing ring;
and step five, machining a sealing ring on the surface of the other side of the metal gasket by adopting the same method as the step four.
5. The method according to claim 4, wherein in the first step, the raw metal sheet is processed into the metal sheet by rolling.
6. The manufacturing method according to claim 4, wherein in the second step, the through hole is processed by stamping.
7. The manufacturing method according to claim 4, wherein in the third step, the seal ring groove is processed by laser etching.
8. The method according to claim 4, wherein in step four, after the seal ring is formed, the mold is removed and the top of the seal ring is polished flat.
9. The manufacturing method according to any one of claims 4 to 8, wherein the mold comprises an inner mold and an outer mold, an annular gap having the same size as the shape of the seal ring groove is formed between the inner mold and the outer mold, and the annular gap and the inner space of the seal ring groove constitute the molding cavity.
10. The manufacturing method according to any one of claims 4 to 8, wherein the material used for the mold is the same as the material used for the metal gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010592716.0A CN113833849A (en) | 2020-06-24 | 2020-06-24 | Metal gasket for diamond pressure cavity high-temperature and high-pressure experiment and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010592716.0A CN113833849A (en) | 2020-06-24 | 2020-06-24 | Metal gasket for diamond pressure cavity high-temperature and high-pressure experiment and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113833849A true CN113833849A (en) | 2021-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010592716.0A Pending CN113833849A (en) | 2020-06-24 | 2020-06-24 | Metal gasket for diamond pressure cavity high-temperature and high-pressure experiment and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113833849A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009270636A (en) * | 2008-05-08 | 2009-11-19 | Asahi Press Industry Co Ltd | Composite gasket |
| CN102027280A (en) * | 2008-03-28 | 2011-04-20 | 以派科泰克的名义经营的腐蚀控制公司 | Isolation gasket, system and method of manufacture |
| CN205401713U (en) * | 2016-03-26 | 2016-07-27 | 苏德印 | Load wheel limit sealing device |
| CN207315837U (en) * | 2017-08-21 | 2018-05-04 | 重庆能源职业学院 | A kind of metallic packing with multiple annular protrusions |
| CN108000058A (en) * | 2017-11-07 | 2018-05-08 | 扬州大学 | A kind of manufacture method of high-cleanness current limliting gasket seal |
| CN108414361A (en) * | 2018-02-08 | 2018-08-17 | 中国工程物理研究院上海激光等离子体研究所 | A kind of Static pressure diamond anvil cell device moving loading experiment suitable for laser |
| CN208670054U (en) * | 2018-07-26 | 2019-03-29 | 利拓密封绝缘技术(上海)有限公司 | Fire prevention gasket |
-
2020
- 2020-06-24 CN CN202010592716.0A patent/CN113833849A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102027280A (en) * | 2008-03-28 | 2011-04-20 | 以派科泰克的名义经营的腐蚀控制公司 | Isolation gasket, system and method of manufacture |
| JP2009270636A (en) * | 2008-05-08 | 2009-11-19 | Asahi Press Industry Co Ltd | Composite gasket |
| CN205401713U (en) * | 2016-03-26 | 2016-07-27 | 苏德印 | Load wheel limit sealing device |
| CN207315837U (en) * | 2017-08-21 | 2018-05-04 | 重庆能源职业学院 | A kind of metallic packing with multiple annular protrusions |
| CN108000058A (en) * | 2017-11-07 | 2018-05-08 | 扬州大学 | A kind of manufacture method of high-cleanness current limliting gasket seal |
| CN108414361A (en) * | 2018-02-08 | 2018-08-17 | 中国工程物理研究院上海激光等离子体研究所 | A kind of Static pressure diamond anvil cell device moving loading experiment suitable for laser |
| CN208670054U (en) * | 2018-07-26 | 2019-03-29 | 利拓密封绝缘技术(上海)有限公司 | Fire prevention gasket |
Non-Patent Citations (1)
| Title |
|---|
| 樊丽秋；赵纯善等: "真空设备设计", vol. 1, 上海科学技术出版社, pages: 267 - 268 * |
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