CN111059132A - Connecting device with memory alloy sealing gasket - Google Patents
Connecting device with memory alloy sealing gasket Download PDFInfo
- Publication number
- CN111059132A CN111059132A CN201911404346.7A CN201911404346A CN111059132A CN 111059132 A CN111059132 A CN 111059132A CN 201911404346 A CN201911404346 A CN 201911404346A CN 111059132 A CN111059132 A CN 111059132A
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- China
- Prior art keywords
- memory alloy
- shape memory
- gasket
- temperature
- shape
- Prior art date
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 118
- 238000007789 sealing Methods 0.000 title claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 25
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 17
- 230000007704 transition Effects 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 230000003446 memory effect Effects 0.000 claims abstract description 9
- 230000032683 aging Effects 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 229910010380 TiNi Inorganic materials 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- 230000009466 transformation Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a connecting device provided with a memory alloy sealing gasket, which comprises a bolt, a box body, a box cover and a shape memory alloy gasket; the bolt sequentially penetrates through the box body, the box cover and the shape memory alloy gasket and then is sleeved with the nut, and when the temperature of the shape memory alloy gasket is lower than the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket is in a flattened shape; when the temperature of the shape memory alloy gasket is larger than or equal to the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket generates a shape memory effect to recover, after the shape memory alloy gasket recovers, the surface of the shape memory alloy gasket is in a corrugated structure along the circumferential direction, and the device can effectively solve the problem of transmission line faults caused by heating of a drainage plate due to loosening of a tension clamp bolt.
Description
Technical Field
The invention belongs to the technical field of power equipment, and relates to a connecting device provided with a memory alloy sealing gasket.
Background
With the rapid development of electric power industry in China, the requirements on the safety and reliability of a power transmission line are gradually improved, but factors such as aging, overload, improper installation and maintenance process, complex environmental conditions and the like caused by long-term operation of power transmission equipment easily cause poor contact of a contact and overlarge contact resistance, and the electric energy loss and the circuit heating phenomenon caused by the poor contact and the overlarge contact resistance easily cause circuit damage. The problem of heating of the drainage plate is solved, and the drainage plate has important significance for reducing the loss of power equipment and social property and guaranteeing the safe operation of a power system.
At present, a common connecting device used is blown by long-term strong wind to cause a drainage wire to shake for a long time, so that a tension clamp bolt is loosened, resistance is increased, a circuit generates heat too fast, and finally the phenomenon of heat damage is endless, and even serious power grid accidents are caused. .
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a connecting device provided with a memory alloy sealing gasket, which can effectively solve the problem of transmission line faults caused by heating of a drainage plate due to loosening of a tension clamp bolt.
In order to achieve the purpose, the connecting device provided with the memory alloy sealing gasket comprises a bolt, a box body, a box cover and a shape memory alloy gasket;
the bolt sequentially penetrates through the box body, the box cover and the shape memory alloy gasket and then is sleeved with the nut, and when the temperature of the shape memory alloy gasket is lower than the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket is in a flattened shape; when the temperature of the shape memory alloy gasket is more than or equal to the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket generates a shape memory effect to recover, and after the shape memory alloy gasket recovers, the surface of the shape memory alloy gasket is in a corrugated structure along the circumferential direction.
The austenite initial phase transition temperature of the shape memory alloy material is 40-60 ℃.
The material of the shape memory alloy gasket is TiNi shape memory alloy.
The preparation process of the shape memory alloy gasket comprises the following steps: smelting according to the proportion of Ti element and Ni element in the TiNi shape memory alloy to obtain an ingot, wherein the smelting temperature is 1250-1300 ℃, the smelting time is 30min, then removing the surface defects of the ingot, then rolling into a plate, cutting to obtain a gasket initial product, and then annealing and shaping the gasket initial product at medium temperature to obtain the shaped memory alloy gasket.
The specific process of carrying out medium-temperature annealing and shaping on the gasket initial product comprises the following steps: heating the gasket initial product to 500 ℃, preserving the heat for 30min, and then cooling the gasket initial product to room temperature along with the furnace.
And under the environment that the temperature is lower than the austenite initial phase transition temperature of the shape memory alloy material, applying external force to the shape memory alloy gasket to enable the shape memory alloy gasket to be in a flattened shape, enabling the martensite variants in the shape memory alloy material to grow along the preferred orientation direction, enabling the shape memory alloy gasket to generate macroscopic shape change, and unloading by keeping the temperature always lower than the austenite initial phase transition temperature of the shape memory alloy material.
After the memory alloy gasket is recovered, the surface of the memory alloy gasket is in a corrugated structure along the circumferential direction, wherein the number of the undulation periods in the corrugated structure is 3-5.
And (3) carrying out aging treatment on the unloaded shape memory alloy material, wherein the heat preservation temperature of the aging treatment is 450 ℃, and the heat preservation time is 20-30 min.
The invention has the following beneficial effects:
when the connecting device provided with the memory alloy sealing gasket is in specific operation, when poor contact is caused by loose bolts or contact resistance is overlarge due to aging of a strain clamp drainage plate, the circuit is heated, the temperature of the shape memory alloy pad is raised, the shape memory effect is generated on the shape memory alloy pad, the shape memory alloy pad begins to recover, the surface of the shape memory alloy pad forms the corrugated deformation which undulates up and down along the circumferential direction, so that the thickness of the shape memory alloy gasket is increased, the loosened bolt is clamped, the radial friction between the bolt and the connected piece is increased, the effect of the fastening device is achieved, thereby increasing the contact area of the joint, reducing the contact resistance of the joint, effectively reducing the heating of the joint, enabling the circuit contact to recover the normal operation state, avoiding the occurrence of the circuit damage phenomenon, thereby effectual solution strain clamp bolt is not hard up to arouse the drainage plate to generate heat and the transmission line trouble problem that leads to.
Drawings
FIG. 1 is a schematic view of the shape memory alloy gasket 2 showing the structure of the present invention when no shape memory effect occurs;
FIG. 2 is a schematic view of the shape memory alloy gasket 2 showing the shape memory effect of the present invention;
FIG. 3 is a schematic structural diagram of the shape memory alloy pad 2 after the shape memory effect occurs.
Wherein, 1 is a nut, 2 is a shape memory alloy gasket, 3 is a box cover, 4 is a box body and 5 is a bolt.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the connecting device with a memory alloy sealing gasket of the present invention comprises a bolt 5, a box 4, a box cover 3 and a shape memory alloy gasket 2; the bolt 5 sequentially penetrates through the box body 4, the box cover 3 and the shape memory alloy gasket 2 and then is sleeved with the nut 1, and when the temperature of the shape memory alloy gasket 2 is lower than the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket 2 is in a flattened shape; when the temperature of the shape memory alloy gasket 2 is more than or equal to the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket 2 generates a shape memory effect to recover, after the shape memory alloy gasket 2 recovers, the surface of the shape memory alloy gasket 2 is in a corrugated structure along the circumferential direction, wherein the shape memory alloy gasket 2 is made of TiNi shape memory alloy, and the austenite initial phase transition temperature of the shape memory alloy material is 40-60 ℃.
The preparation process of the shape memory alloy gasket 2 comprises the following steps: smelting according to the proportion of Ti element and Ni element in the TiNi shape memory alloy to obtain an ingot, wherein the smelting temperature is 1250-1300 ℃, the smelting time is 30min, then removing the surface defects of the ingot, then rolling into a plate, cutting to obtain a gasket initial product, and then annealing and shaping the gasket initial product at medium temperature to obtain the shaped memory alloy gasket 2.
The specific process of carrying out medium-temperature annealing and shaping on the gasket initial product comprises the following steps: heating the gasket initial product to 500 ℃, preserving the heat for 30min, and then cooling the gasket initial product to room temperature along with the furnace.
Applying external force to the shape memory alloy gasket 2 in an environment with the temperature lower than the austenite initial phase transition temperature of the shape memory alloy material to enable the shape memory alloy gasket to be in a flattened shape, enabling martensite variants in the shape memory alloy material to grow along a preferred orientation direction and enabling the shape memory alloy material to generate macroscopic shape change, unloading by keeping the temperature always lower than the austenite initial phase transition temperature of the shape memory alloy material, and carrying out aging treatment on the unloaded shape memory alloy material to increase the hardness and the strength of the shape memory alloy material, wherein the heat preservation temperature of the aging treatment is 450 ℃, and the heat preservation time is 20-30 min.
When the nut 1 is screwed to a corresponding position by using corresponding fastening torque and a power transmission system works normally, the shape of the shape memory alloy gasket 2 is as shown in figure 1 under the action of the pre-tightening force, when poor contact is caused by loosening of the bolt 5 or contact resistance is overlarge due to aging of a tension clamp drainage plate, a circuit generates heat, the shape memory alloy gasket 2 generates a shape memory effect, the shape memory alloy gasket 2 starts to recover, the surface of the shape memory alloy gasket 2 forms corrugated deformation which fluctuates up and down along the circumferential direction, so that the thickness of the shape memory alloy gasket 2 is increased, the loosened bolt 5 is clamped, radial friction between the bolt 5 and a connected piece is increased, the effect of a fastening device is achieved, the contact area of a joint is increased, the contact resistance of the joint is reduced, the heating of the joint is effectively reduced, and the circuit is contacted to recover a normal operation state, the occurrence of circuit damage phenomenon is avoided, as shown in fig. 2.
After the memory alloy gasket is restored, the surface of the memory alloy gasket is in a corrugated structure along the circumferential direction, wherein the number of the fluctuation cycles in the corrugated structure is 3-5, fig. 3 is a three-dimensional schematic diagram of the shape memory alloy gasket 2 after circumferential corrugation deformation occurs, the corrugation expands and fluctuates along the circumferential direction of the shape memory alloy gasket 2, the corrugation cycle is 3, the wave crest is in contact with the nut 1, the wave trough is connected with the box body 4, 6 contact surfaces are arranged in total, so that the contact area of the shape memory alloy gasket 2 with the nut 1 and the box body 4 is increased, the deformed height is matched with a loose connecting device, the radial friction between the bolt 5 and a connected piece is increased, the effect of fastening the bolt 5 is achieved, heating is effectively reduced, and the memory alloy gasket is safe, reliable, economical and energy-saving.
Claims (8)
1. A connecting device provided with a memory alloy sealing gasket is characterized by comprising a bolt (5), a box body (4), a box cover (3) and a shape memory alloy gasket (2);
the bolt (5) sequentially penetrates through the box body (4), the box cover (3) and the shape memory alloy gasket (2) and then is sleeved with the nut (1), and when the temperature of the shape memory alloy gasket (2) is lower than the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket (2) is in a flattened shape; when the temperature of the shape memory alloy gasket (2) is larger than or equal to the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket (2) generates a shape memory effect to recover, and after the shape memory alloy gasket (2) recovers, the surface of the shape memory alloy gasket (2) is in a corrugated structure along the circumferential direction.
2. The coupling device with a memory alloy sealing gasket of claim 1, wherein the shape memory alloy material has an austenite start transformation temperature of 40 ℃ to 60 ℃.
3. The coupling device with memory alloy sealing gasket according to claim 1, wherein the shape memory alloy gasket (2) is made of TiNi shape memory alloy.
4. The coupling device with memory alloy sealing gasket according to claim 1, wherein the shape memory alloy gasket (2) is prepared by the following steps: smelting according to the proportion of Ti element and Ni element in the TiNi shape memory alloy to obtain an ingot, wherein the smelting temperature is 1250-1300 ℃, the smelting time is 30min, then removing the surface defects of the ingot, then rolling into a plate, cutting to obtain a gasket initial product, and then annealing and shaping the gasket initial product at medium temperature to obtain the shaped memory alloy gasket (2).
5. The connecting device with a memory alloy sealing gasket of claim 4, wherein the specific process of annealing and shaping the gasket initial product at medium temperature is as follows: heating the gasket initial product to 500 ℃, preserving the heat for 30min, and then cooling the gasket initial product to room temperature along with the furnace.
6. The connection device with memory alloy sealing gasket according to claim 5, wherein, in the environment of temperature less than the austenite initial phase transition temperature of the shape memory alloy material, the shape memory alloy gasket (2) is applied with external force to be flattened, so that the martensite variant in the shape memory alloy material grows along the preferred orientation direction, the macroscopic shape change is generated, and the unloading is carried out by keeping the temperature always lower than the austenite initial phase transition temperature of the shape memory alloy material.
7. The coupling device with memory alloy sealing gasket according to claim 1, wherein after the memory alloy gasket is recovered, the surface of the memory alloy gasket is in a corrugated structure along the circumferential direction, wherein the number of the undulation periods in the corrugated structure is 3-5.
8. The connecting device with the memory alloy sealing gasket as recited in claim 6, wherein the unloaded shape memory alloy material is subjected to aging treatment, wherein the temperature of the aging treatment is 450 ℃ and the time of the aging treatment is 20min to 30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911404346.7A CN111059132A (en) | 2019-12-30 | 2019-12-30 | Connecting device with memory alloy sealing gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911404346.7A CN111059132A (en) | 2019-12-30 | 2019-12-30 | Connecting device with memory alloy sealing gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111059132A true CN111059132A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911404346.7A Pending CN111059132A (en) | 2019-12-30 | 2019-12-30 | Connecting device with memory alloy sealing gasket |
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| CN (1) | CN111059132A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112322954A (en) * | 2020-11-03 | 2021-02-05 | 西北工业大学 | Airplane wallboard assembly clearance compensation shape memory alloy gasket and preparation and assembly methods thereof |
| CN113339386A (en) * | 2021-06-10 | 2021-09-03 | 郑州大学 | Bolt axial force detection and automatic compensation device |
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| EP2918856A1 (en) * | 2014-03-14 | 2015-09-16 | Thales | Washer intended for being used in a screwed assembly and assembly method using the washer |
| US20150267736A1 (en) * | 2006-04-21 | 2015-09-24 | Hubbell Incorporated | Bonding washer |
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| CN106594048A (en) * | 2016-11-08 | 2017-04-26 | 国家电网公司 | Bolt assembly of shape memory alloy cable clamp |
| CN107642535A (en) * | 2017-11-07 | 2018-01-30 | 陈小龙 | The mechanical or for building connecting bolt of fast and easy connection |
| CN107654470A (en) * | 2017-11-07 | 2018-02-02 | 陈小龙 | Building or machinery bolt |
| CN107676358A (en) * | 2017-11-03 | 2018-02-09 | 重庆吉能电气(集团）有限公司 | A kind of tight screw of speed |
-
2019
- 2019-12-30 CN CN201911404346.7A patent/CN111059132A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2883762Y (en) * | 2005-11-01 | 2007-03-28 | 甘肃省机械科学研究院 | Connector set with memory alloy sealing gasket |
| US20150267736A1 (en) * | 2006-04-21 | 2015-09-24 | Hubbell Incorporated | Bonding washer |
| CN102518640A (en) * | 2011-12-23 | 2012-06-27 | 北京西脉记忆合金有限公司 | Elastic gasket made of memory alloy materials and preparation method thereof |
| EP2918856A1 (en) * | 2014-03-14 | 2015-09-16 | Thales | Washer intended for being used in a screwed assembly and assembly method using the washer |
| CN205780217U (en) * | 2016-05-31 | 2016-12-07 | 杭州中电天恒电力科技有限公司 | A kind of packing ring |
| CN106594048A (en) * | 2016-11-08 | 2017-04-26 | 国家电网公司 | Bolt assembly of shape memory alloy cable clamp |
| CN107676358A (en) * | 2017-11-03 | 2018-02-09 | 重庆吉能电气(集团）有限公司 | A kind of tight screw of speed |
| CN107642535A (en) * | 2017-11-07 | 2018-01-30 | 陈小龙 | The mechanical or for building connecting bolt of fast and easy connection |
| CN107654470A (en) * | 2017-11-07 | 2018-02-02 | 陈小龙 | Building or machinery bolt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112322954A (en) * | 2020-11-03 | 2021-02-05 | 西北工业大学 | Airplane wallboard assembly clearance compensation shape memory alloy gasket and preparation and assembly methods thereof |
| CN113339386A (en) * | 2021-06-10 | 2021-09-03 | 郑州大学 | Bolt axial force detection and automatic compensation device |
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Application publication date: 20200424 |