CN111102318A - Spiral friction damping device for electrical equipment - Google Patents
Spiral friction damping device for electrical equipment Download PDFInfo
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- CN111102318A CN111102318A CN202010035406.9A CN202010035406A CN111102318A CN 111102318 A CN111102318 A CN 111102318A CN 202010035406 A CN202010035406 A CN 202010035406A CN 111102318 A CN111102318 A CN 111102318A
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- friction
- electrical equipment
- spiral
- outer ring
- equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/02—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together
- F16F7/04—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together in the direction of the axis of rotation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
A spiral friction damping device for electrical equipment, which is pillar type electrical equipment, is positioned between the electrical equipment and an equipment bracket and comprises a vertically arranged cylinder, a transmission shaft axially arranged in the cylinder and a damping assembly arranged around the transmission shaft; the shock absorption assembly comprises an elastic assembly and vertical friction assemblies positioned at two ends of the elastic assembly; the friction components comprise upper and lower friction components which are symmetrically arranged; the upper friction component and the lower friction component are respectively composed of the inner ring and the outer ring which are attached by the conical surfaces, the shock absorption performance of the shock absorption device is effectively improved, and the service life of the shock absorption device is greatly prolonged.
Description
Technical Field
The invention relates to a damping device, in particular to a spiral friction damping device for pillar type electrical equipment in a transformer substation.
Background
The energy base and the electric load are distributed unevenly, and a large number of power transformation (converter) stations are built in the areas with high earthquake intensity and unfavorable earthquake resistance. Key equipment such as a lightning arrester, a mutual inductor and the like of a power transformation (converter) station are pillar type electrical equipment, the equipment is usually made of porcelain materials for ensuring the insulating property, and the electrical gap requires the equipment to be thin and high in structure, so that the design and the manufacture of the equipment are difficult to give consideration to the anti-seismic property, and the pillar type equipment is seriously damaged by an earthquake.
In order to improve the anti-seismic performance of post type electrical equipment in an earthquake high-intensity area station, patent ZL 201010524100.6 provides a damping device based on lead alloy deformation energy consumption, which is triggered when an earthquake occurs, and the hysteresis curve of the damper is a quadrangle occupying four quadrants under the action of reciprocating load, but because the damping device cannot be automatically reset, residual deformation exists after the earthquake, and the equipment can accumulate adverse effects such as inclination and offset. Chinese patents CN 104482108B and CN 105604203B provide friction type damping devices that can reset after earthquake, however, such damping devices have a single large friction contact surface, simple friction track, low friction energy consumption effect, poor material wear resistance, frequent replacement, short service life, and can not satisfy the requirements of safe and stable operation of power stations, affecting the damping performance.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a spiral friction damping device for electrical equipment.
The technical scheme provided by the invention is as follows:
a spiral friction shock-absorbing device for electrical equipment, wherein the electrical equipment is pillar type electrical equipment, the shock-absorbing device is positioned between the electrical equipment and an equipment bracket, the device comprises a vertically arranged cylinder body, a transmission shaft axially arranged in the cylinder body and a shock-absorbing assembly arranged around the transmission shaft;
the shock absorption assembly comprises an elastic assembly and vertical friction assemblies positioned at two ends of the elastic assembly;
the friction components comprise upper and lower friction components which are symmetrically arranged; the upper friction component and the lower friction component are respectively composed of an inner ring and an outer ring which are attached to each other through conical surfaces.
Furthermore, vertical sliding guide ridges are symmetrically arranged on the outer side of the transmission shaft.
Furthermore, the transmission shafts positioned at the upper end and the lower end of the elastic component are respectively and sequentially provided with a gasket, the friction component, a fixing part and an end cover.
Further, the inner ring is a single-conical ring, and the outer ring is composed of at least two segmented rings.
Furthermore, the upper and lower friction components which are symmetrically arranged are respectively symmetrically or parallelly provided with an upper symmetric sub-friction component and a lower symmetric sub-friction component; provided that 1 of said symmetrical friction packs is provided with an outer ring.
Further, the number of the sub-friction assemblies arranged in parallel is at least 2.
Further, the inner ring and the gasket are provided with guide grooves corresponding to the sliding guide ridges.
Furthermore, the outer wall of the outer ring and the inner wall of the cylinder are vertically provided with corresponding spiral guide grooves and spiral guide ridges.
Furthermore, the upper end and the lower end of the cylinder are respectively and symmetrically provided with an upper concave type end cover and a lower concave type end cover; the upper end cover is provided with a through hole for the transmission shaft to pass through.
Further, the friction component comprises, by mass, 0.4-0.48% of C, 1.0-1.2% of Al, 0.45-0.80% of Si, 1.2-1.5% of Mo, 0.15% of V, 0.05% of Ti, 0.005% of B, 0.2-0.22% of Re, 0.3-0.5% of Mg, and the balance of Fe and impurities.
Further, the cylinder comprises, by mass, 0.3-0.5% of C, 0.6-0.8% of Si, 0.9-1.2% of W, 2.9-3.9% of Cr2, 1.2-1.8% of Ti1.2, 78-4% of Mn2, 0.9-1.2% of Mo, 0.02-0.04% of S, and the balance of Fe and impurities.
Furthermore, the ridge guide comprises the following components, by mass, 3.9-4.5% of C, 0.6-0.8% of W, 1.3-2.5% of Cu1.2-1.8% of Re, 4-6% of Mn, 2.9-3.9% of Cr, 0.7-1.5% of Ni0.02-0.04% of S, and the balance of iron and impurities.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
1) the damping device provided by the invention has a compact structure and a clear damping mechanism, the outer ring rotates when moving up and down due to the design of the spiral guide rail, and the outer ring generates spiral friction with the cylinder wall and also generates friction with the ring surface of the inner ring and the end surface of the gasket, so that the energy consumption effect of multiple rotary friction is achieved, the friction performance of the damping device is further improved, and the safe operation of electrical equipment is ensured.
2) The friction assembly provided by the invention is made of a material with excellent wear resistance, so that the service life of the friction assembly can be effectively prolonged, the maintenance is reduced, the cost is saved, and the reliability of the damping device is greatly improved.
3) The damping device provided by the invention is provided with the trigger force when the electrical equipment normally works, so that the equipment is prevented from misoperation; when an earthquake occurs, the larger the swing amplitude of the equipment is, the larger the friction damping is, and the damping efficiency is high; after the earthquake, the device can be reset through a self-recovery mechanism without residual deformation.
Drawings
FIG. 1 is a cross-sectional view of a shock absorbing device provided by the present invention;
FIG. 2 is a sectional view of a guide groove type friction member A-A according to embodiment 1 of the present invention;
FIG. 3 is a bottom view of a channel-type friction pack provided in embodiment 1 of the present invention;
FIG. 4 is a front view of a guide-groove type friction member provided in embodiment 1 of the present invention;
FIG. 5 is a sectional view of a guide groove type friction member A-A according to embodiment 2 of the present invention;
FIG. 6 is a bottom view of a channel-type friction pack provided in embodiment 2 of the present invention;
FIG. 7 is a front view of a guide-groove type friction pack provided in embodiment 2 of the present invention;
FIG. 8 is a bottom view of a rail-shaped outer ring provided in embodiment 3 of the present invention;
FIG. 9 is a front view of a rail-type outer ring according to embodiment 3 of the present invention;
FIG. 10 is a schematic view of the installation of the shock absorbing device provided by the present invention;
0 sliding guide ridge; 1, a lower end cover; 2, a cylinder body; 3, an upper end cover; 4, a transmission shaft; 5, a locknut; 6 adjusting the nut; 7, an inner ring; 8, an outer ring; 9, spiral guide ridge; 10 an elastic component; 11 a gasket; 12 an electrical device; 13 a shock-absorbing device; 14 an equipment rack; 15 supporting the mechanism.
Detailed Description
The technical solutions provided by the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the present invention, and not all of it.
In order to solve the problems of insufficient damping performance and short service life of a damping device in the prior art, the invention provides a spiral friction damping device for electrical equipment, and the electrical equipment is post electrical equipment such as a lightning arrester, a mutual inductor and the like in a power transformation (converter) station.
As shown in fig. 1, the damping device comprises a cylinder body 2 which is vertically arranged, a transmission shaft 4 which is axially arranged on the cylinder body 2, and a damping component which is arranged around the transmission shaft 4; the shock absorption assembly comprises an elastic assembly 10 and friction assemblies positioned at two ends of the elastic assembly 10; the friction components comprise upper and lower friction components which are symmetrically arranged; the upper and lower friction components are respectively composed of an inner ring 7 and an outer ring 8 which are jointed by conical surfaces. And the transmission shaft 4 at the upper end and the lower end of the elastic component 10 is respectively and sequentially provided with a gasket 11, a friction component, a fixing part and an end cover. The fixing parts in the embodiment are an outer locknut 5 and an inner adjusting nut 6, and vertical sliding guide ridges 0 are symmetrically arranged on the outer side of the transmission shaft 4. The inner ring 7 is a single-cone ring and the outer ring 8 is composed of at least two segmented rings. The upper friction component and the lower friction component are respectively symmetrically or parallelly provided with an upper sub-friction component and a lower symmetrical friction component, and the inner ring 7 and the gasket 11 are provided with guide grooves corresponding to the sliding guide ridges 0 on the transmission shaft 4. The outer wall of the outer ring 8 and the inner wall of the barrel 2 are vertically provided with corresponding spiral guide grooves and spiral guide ridges 9. The upper end and the lower end of the cylinder body 2 are respectively and symmetrically provided with an upper concave end cover 3 and a lower concave end cover 1, the transmission shaft 4 penetrates through the upper end cover 3 and is fixedly connected with the flange bottom of the electrical equipment 12, and the lower end of the cylinder body 2 is fixedly connected with the top plate of the equipment support 14. The elastic component 10 may be a cylindrical helical compression spring, a rectangular-section cylindrical helical compression spring, a belleville spring, or the like, and is selected according to the magnitude and size of the output force during design.
The transmission shaft 4 is provided with symmetrical linear sliding guide ridges 0, and the inner ring 7 and the gasket 11 are provided with guide grooves corresponding to the sliding guide ridges 0, so that the transmission shaft 4 is ensured not to rotate relative to the transmission shaft 4 and only to generate vertical position dislocation in the up-and-down action process of the transmission shaft 4. The outer ring surface of the outer ring 8 is provided with a spiral guide groove, the inner wall of the cylinder 2 is provided with a spiral guide ridge 9 corresponding to the guide groove of the outer ring 8, the spiral guide ridge and the spiral guide ridge form a spiral kinematic pair, and the section of the spiral kinematic pair can be triangular, trapezoidal, rectangular and the like.
As shown in fig. 5, when the shock absorbing device for electrical equipment is installed, a support mechanism 15 is fixed between the electrical equipment 12 and the bracket 14 by welding or bolts at the center of the top plate of the bracket, and the electrical equipment 12 is floated on the support mechanism 15, and the support mechanism 15 is preferably a cylinder. The damping devices 13 are arranged between the electrical equipment 12 and the support 14 thereof and are arranged at the periphery of the support mechanism 15, the number of the damping devices 13 is preferably consistent with that of mounting holes of a bottom flange of the electrical equipment 12, and the diameter of a bolt rod of the damping device 13 is preferably matched with that of an opening of the bottom flange of the electrical equipment 12. The body of each damping device 13 penetrates through a hole in the top plate of the support, a bolt at the top of each damping device 13 penetrates through a hole in the bottom flange of the equipment and clamps the bottom flange of the electrical equipment 12 through an upper group of nuts and a lower group of nuts, and the nuts are preferably matched with elastic pads or double nuts to prevent looseness.
When the electrical equipment 12 does not need the damping device 13 for conventional installation, the electrical equipment 12 directly falls on the top plate of the support 14 and is connected through bolts and nuts, and after the damping device is selected, the diameter of the opening of the top plate of the support is only required to be expanded to the size of the body of the damping device, the original installation and arrangement form is not changed, and only the damping device 13 and the supporting mechanism 15 are additionally arranged between the electrical equipment 12 and the support 14.
The assembly method of the damping device comprises the following steps:
an elastic component 10 and a transmission shaft 4 penetrating through the elastic component 10 are arranged in the cylinder body 2, friction components penetrating through the transmission shaft 4 are arranged at the upper end and the lower end of the elastic component 10, and a gasket 11 is arranged between the inner ring 7 and the elastic component 10. The two ends of the transmission shaft 4 are respectively screwed into one adjusting nut 6 and the locknut 5, the friction component is pushed by screwing the adjusting nuts 6 to extrude the elastic component 10 to a preset compression amount in opposite directions, and the locknuts 5 on the outer sides of the two adjusting nuts 6 are screwed. After the adjusting nut 6 is screwed down, the elastic component 10 has pretightening force, the friction component is extruded to enable the outer ring 8 and the inner side of the cylinder 2 to generate pressure, and for convenient assembly, the length of the cylinder 2 is suitable for enabling two end faces of the cylinder 2 to be flush with the outer end face of the friction component after pretightening. The upper end cover 3 and the lower end cover 1 cover the cylinder body 2 from the upper end and the lower end respectively and are fastened through screws. The inner baffle rings of the upper end cover 3 and the lower end cover 1 are attached to the outer end face of the friction component. The upper end of the transmission shaft 4 is connected with a flange at the bottom of the equipment 12 through two groups of nuts, and the cylinder body 2 is fixed with a top plate of the equipment support 14 through two groups of specially-made nuts.
The working principle of the damping device is as follows:
because the elastic component 10 has pre-pressure, the outer ring 8 is extruded to enable the outer ring 8 and the inner wall of the cylinder 2 to generate pressure through the conical surface, when the damping device 13 is in a normal working state of equipment or receives small external force (such as wind load or opening and closing operation force), the external force cannot overcome static friction force between the outer ring 8 and each friction surface and the pre-pressure of the elastic component 10, and at the moment, the damping device 13 does not act. When an earthquake with the level of possible damage to equipment occurs, the electrical equipment 12 swings under the action of the earthquake, the bottom flange of the electrical equipment 12 takes the supporting mechanism 15 as a fulcrum to drive the shock absorption devices 13 on two sides to move up and down, at the moment, the external force overcomes the static friction force between the outer ring 8 and each friction surface, the outer ring 8 at the lower end and the upper end respectively rises and falls along the spiral motion pair spiral, the outer ring 8 and the inner wall of the barrel 2 are subjected to rotary friction while being subjected to vertical friction, meanwhile, the rotary friction is also generated between the outer ring 8 and the gasket 11, and between the outer ring 8 and the inner ring 7, a plurality of contact surfaces are subjected to friction energy consumption at the same time, and the earthquake energy transmitted to the electrical. In addition, the larger the operation range of the damper device 13, the larger the compression amount of the elastic member 10, the larger the pressure between the outer ring 8 and each contact surface, and the stronger the friction damping effect. After the earthquake is stopped, the restoring force of the elastic component 10 overcomes the friction force to push the friction component back to the initial position, and almost no residual deformation exists.
Example 1
As shown in fig. 2, the inner ring 7 of the friction assembly is 1 single-conical ring, the outer ring 8 is a single-conical ring composed of 3 segmented rings with the same size, the conical surfaces of the inner ring 7 and the outer ring 8 are attached, the outer side of the outer ring 8 is provided with a guide groove, the inner wall of the cylinder 2 is provided with a corresponding spiral guide ridge 9, the two form a spiral kinematic pair, and when the transmission shaft 4 moves up and down, the outer ring 8 is driven to move up and down, and the outer ring 8 is driven to rotate.
The friction component comprises the following components, by mass, 0.4% of C, 1.2% of Al, 0.45% of Si, 1.5% of Mo1, 0.15% of V, 0.05% of Ti, 0.005% of B, 0.2% of Re, 0.5% of Mg, and the balance of Fe and impurities; the cylinder comprises the following components, by mass, 0.3% of C, 0.8% of Si, 0.9% of W, 3.9% of Cr3, 1.2% of Ti1, 4% of Mn, 0.9% of Mo0, 0.04% of S, and the balance of Fe and impurities; the ridge guide comprises the following components, by mass, 3.9% of C, 0.8% of W, 1.3% of Cu1, 1.8% of Re, 4% of Mn, 3.9% of Cr, 0.7% of Ni0, 0.04% of S, and the balance of Fe and impurities.
Example 2
As shown in fig. 3, the friction assembly comprises two single-conical inner rings 7 and a double-conical outer ring 8 which are attached in opposite directions, the outer ring 8 is a single-conical ring consisting of 3 segmented rings with the same size, the conical surfaces of the inner ring 7 and the outer ring 8 are attached, a guide groove is arranged on the outer side of the outer ring 8, a corresponding spiral guide ridge 9 is arranged on the inner wall of the barrel 2, the two spiral guide ridges form a spiral kinematic pair, and when the transmission shaft 4 moves up and down, the outer ring 8 is driven to move up and down, and the outer ring 8 is rotated.
The friction component comprises the following components, by mass, 0.48% of C, 1.0% of Al, 0.80% of Si, 1.2% of Mo1.2%, 0.15% of V, 0.05% of Ti, 0.005% of B, 0.22% of Re, 0.3% of Mg, and the balance of Fe and impurities; the cylinder comprises the following components, by mass, 0.5% of C, 0.6% of Si, 1.2% of W, 2.9% of Cr2, 1.8% of Ti1, 2% of Mn, 1.2% of Mos, 0.02% of S, and the balance of Fe and impurities; the ridge guide comprises the following components, by mass, 4.5% of C, 0.6% of W, 2.5% of Cu, 1.2% of Re, 6% of Mn, 2.9% of Cr, 1.5% of Ni, 0.02% of S, and the balance of Fe and impurities.
Example 3
As shown in fig. 4, the outer ring 8 has a guide ridge on the outer side, and the corresponding cylinder 2 has a guide groove on the inner side, which form a screw pair.
Example 4
The friction assembly consists of a plurality of pairs of single conical inner rings 7 and outer rings 8 which are arranged in parallel, and is a superposition form of the embodiment 1.
Example 5
The friction component consists of a plurality of pairs of single conical surface inner rings 7 and double conical surface outer rings 8 which are arranged in parallel and are attached oppositely, and is in a superposition mode of the embodiment 2.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.
Claims (12)
1. A spiral friction shock-absorbing device for electrical equipment, wherein the electrical equipment is pillar type electrical equipment, and the shock-absorbing device is positioned between the electrical equipment and an equipment bracket;
the shock absorption assembly comprises an elastic assembly and vertical friction assemblies positioned at two ends of the elastic assembly;
the friction components comprise upper and lower friction components which are symmetrically arranged; the upper friction component and the lower friction component are respectively composed of an inner ring and an outer ring which are attached to each other through conical surfaces.
2. The screw friction cushioning device for electric equipment as claimed in claim 1, wherein said transmission shaft is provided with vertical sliding guide ridges symmetrically on the outside.
3. The spiral friction shock absorbing device for electric equipment as claimed in claim 1, wherein said transmission shafts located at upper and lower ends of said elastic member are respectively provided with a washer, said friction member, a fixing member and an end cap in sequence.
4. A helical friction cushioning device for electrical equipment as set forth in claim 1 wherein said inner ring is a single conical ring and said outer ring is comprised of at least two segmented rings.
5. The spiral friction shock absorbing device for electrical equipment as claimed in claim 1, wherein the upper and lower friction members are symmetrically or parallelly provided with an upper symmetric sub-friction member and a lower symmetric sub-friction member, respectively; provided that 1 of said symmetrical friction packs is provided with an outer ring.
6. A helical friction cushioning device for electrical equipment as set forth in claim 5 wherein said number of parallel arranged sub-friction units is at least 2.
7. A spiral friction cushioning device for electric equipment as set forth in claim 3, wherein said inner ring and said washer are provided with guide grooves corresponding to said sliding guide ridges.
8. The helical friction cushioning device for electrical equipment as claimed in claim 1, wherein said outer wall of said outer ring and said inner wall of said barrel are vertically provided with corresponding helical guide grooves and helical guide ridges.
9. A spiral friction shock absorbing device for electrical equipment as claimed in claim 3, wherein upper and lower ends of said cylinder are symmetrically provided with upper and lower concave end caps, respectively; the upper end cover is provided with a through hole for the transmission shaft to pass through.
10. The spiral friction cushioning device for electric equipment as set forth in claim 1, wherein said friction member comprises, in mass%, C0.4-0.48%, Al 1.0-1.2%, Si 0.45-0.80%, Mo1.2-1.5%, V0.15%, Ti 0.05%, B0.005%, Re 0.2-0.22%, Mg 0.3-0.5%, and the balance of Fe and impurities.
11. The spiral friction shock-absorbing device for electrical equipment according to claim 1, wherein the cylinder comprises, by mass, 0.3 to 0.5% of C, 0.6 to 0.8% of Si, 0.9 to 1.2% of W, 2.9 to 3.9% of Cr2, 1.2 to 1.8% of Ti, 78 to 4% of Mn2, 0.9 to 1.2% of Mo, 0.02 to 0.04% of S, and the balance of Fe and impurities.
12. The spiral friction shock-absorbing device for electrical equipment as claimed in claim 2, wherein said guide ridge comprises, by mass, 3.9-4.5% of C, 0.6-0.8% of W, 1.3-2.5% of Cu, 1.2-1.8% of Re, 4-6% of Mn, 2.9-3.9% of Cr, 0.7-1.5% of Ni, 0.02-0.04% of S, and the balance of Fe and impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010035406.9A CN111102318A (en) | 2020-01-14 | 2020-01-14 | Spiral friction damping device for electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010035406.9A CN111102318A (en) | 2020-01-14 | 2020-01-14 | Spiral friction damping device for electrical equipment |
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| CN111102318A true CN111102318A (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010035406.9A Pending CN111102318A (en) | 2020-01-14 | 2020-01-14 | Spiral friction damping device for electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022217789A1 (en) * | 2021-04-13 | 2022-10-20 | 中国电力科学研究院有限公司 | Damping device and design method for damping device |
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2020
- 2020-01-14 CN CN202010035406.9A patent/CN111102318A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022217789A1 (en) * | 2021-04-13 | 2022-10-20 | 中国电力科学研究院有限公司 | Damping device and design method for damping device |
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