CN204270911U - Oil bumper and high voltage DC breaker - Google Patents
Oil bumper and high voltage DC breaker Download PDFInfo
- Publication number
- CN204270911U CN204270911U CN201420686484.5U CN201420686484U CN204270911U CN 204270911 U CN204270911 U CN 204270911U CN 201420686484 U CN201420686484 U CN 201420686484U CN 204270911 U CN204270911 U CN 204270911U
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- piston
- oil
- breeze way
- buffering
- sealed cylinder
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- 230000003139 buffering effect Effects 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 abstract description 14
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 58
- 239000000872 buffer Substances 0.000 description 10
- 238000013016 damping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model provides oil bumper and high voltage DC breaker, the sealed cylinder extended before and after oil bumper of the present utility model comprises and leading the piston be slidably matched with sealed cylinder, buffering oil is full of in sealed cylinder, the front end of sealed cylinder is provided with for being led the breeze way be slidably matched with piston external diameter, and the outer peripheral face of piston is provided with along the retracted orientation of piston the buffering curved surface that the gap when moving in breeze way and between the internal face of breeze way increases gradually.The piston of this oil bumper can be easy to produce difform curved surface, manufacture simple, oily flow of discharging from the gap between curved surface and oil cylinder can be cushioned by controlling calculation by designing different curved surfaces, the buffering of piston different motion state can be met, simultaneously, due to the moving parts not having other less in airtight oil cylinder, be not easy to damage.
Description
Technical field
the utility model relates to oil bumper and high voltage DC breaker.
Background technology
The divide-shut brake movement velocity of primary cut-out is higher, and the movement travel of contact is relatively little, the contact of high-speed motion is stopped in short stroke, need to adopt the good buffer of buffering effect to absorb the kinetic energy of moving component, prevent the parts in circuit breaker from damaging because being subject to huge impact, therefore, buffer plays vital effect to the use of circuit breaker and performance.In prior art, circuit breaker buffer has employing oil bumper more; oil bumper is except absorbing the kinetic energy of circuit breaker moving component; protective circuit breaker moving component is not hit and damages, and its damping characteristics also directly affects that circuit breaker divides, speed and stroke curve in latter stage of closing a floodgate.
Notification number is the oil bumper that the Chinese utility model patent of CN201315270Y discloses circuit breaker, the type buffer adopts the general structure of inner cylinder body, outer cylinder body, piston rod and oil seal parts, in divide-shut brake motion process, piston rod moves along its axial direction in little cylinder body, promote hydraulic oil to flow out from inner cylinder body circumferencial direction damping hole, thus play cushioning effect.The damping hole of the factor affecting damping characteristics mainly on little cylinder body, suitable damping hole size and position relationship can improve the reliability and stability of circuit breaker.But the buffer structure of the type is complicated, parts machining difficulty is large, cost is high, and efficiency of assembling is low, be not easy to safeguard.
Utility model content
The purpose of this utility model is to provide that a kind of structure is simple, the good oil bumper of buffering effect; Meanwhile, the utility model additionally provides a kind of high voltage DC breaker using this oil bumper.
Oil bumper of the present utility model adopts following technical scheme: oil bumper, the sealed cylinder extended before and after comprising and leading the piston be slidably matched with sealed cylinder, buffering oil is full of in sealed cylinder, the front end of described sealed cylinder is provided with for being led the breeze way be slidably matched with piston external diameter, and the outer peripheral face of described piston is provided with along the retracted orientation of piston the buffering curved surface that the gap when moving in breeze way and between the internal face of breeze way increases gradually.
Described buffering curved surface has multiple and circumference to be disposed on piston.
Described buffering curved surface comprises the stepped plane of two or more.
Described piston is provided with non-buffered section in the rear side of breeze way, and described non-buffered section has for the identical spigot surface of the outer circumference surface at the maximum outside diameter place with piston, and described spigot surface is provided with the axially extended of indent and crosses oil groove.
Described piston is provided with the oil through at axially through piston two ends.
High voltage DC breaker of the present utility model adopts following technical scheme: high voltage DC breaker, comprise operating mechanism, described operating mechanism upper driving is connected with oil bumper, described oil bumper comprises sealed cylinder and to lead the piston be slidably matched with sealed cylinder, buffering oil is full of in sealed cylinder, the front end of described sealed cylinder is provided with for being led the breeze way be slidably matched with piston external diameter, and the outer peripheral face of described piston is provided with along the retracted orientation of piston the buffering curved surface that the gap when moving in breeze way and between the internal face of breeze way increases gradually.
Described buffering curved surface has multiple and circumference to be disposed on piston.
Described buffering curved surface comprises the stepped plane of two or more.
Described piston is provided with non-buffered section in the rear side of breeze way, and described non-buffered section has for the identical spigot surface of the outer circumference surface at the maximum outside diameter place with piston, and described spigot surface is provided with the axially extended of indent and crosses oil groove.
Described piston is provided with the oil through at axially through piston two ends.
Breeze way is axially arranged with in oil bumper sealed cylinder of the present utility model, when piston moves to breeze way, buffering oil in piston press cushion chamber, cushion in the gap between the oily curved surface by piston outer periphery and breeze way internal face and discharge, because the gap between the curved surface of piston outer periphery and the internal face of breeze way reduces gradually, buffering oil delivery flow from gap in breeze way reduces gradually, do not have the buffering oil of discharging to become large gradually to the resistance that piston produces in breeze way, play buffer-braking effect.The piston of this oil bumper can be easy to produce difform curved surface, manufacture simple, oily flow of discharging from the gap between curved surface and oil cylinder can be cushioned by controlling calculation by designing different curved surfaces, the buffering of piston different motion state can be met, simultaneously, due to the moving parts not having other less in airtight oil cylinder, be not easy to damage.
Accompanying drawing explanation
Fig. 1 is the example structure schematic diagram of a kind of oil bumper of the utility model;
Fig. 2 is the structural representation of airtight oil cylinder in Fig. 1;
Fig. 3 is the cutaway view in A-A face in Fig. 2;
Fig. 4 is the perspective view of piston rod in Fig. 1;
Fig. 5 is the structural representation of a kind of high voltage DC breaker of the present utility model.
Embodiment
The embodiment of a kind of high voltage DC breaker of the present utility model: as Figure 1-5, comprise breaker body 10, the operating mechanism 100 for driving contact of breaker divide-shut brake is provided with in breaker body 10, oil bumper rear end is hinged with the frame of operating mechanism by bearing pin 9, and can rotate around bearing pin 9, the output shaft 7 of operating mechanism 100 is in transmission connection respectively by output toggle arm 6 piston rod 1 of shackle rod 8 and oil bumper front end, piston rod 1 is connected elongated hole 5 for being provided with one end that output toggle arm 6 is in transmission connection, output toggle arm 6 is provided with and the pivot pin 60 being connected elongated hole 5 and coordinating, when output shaft 7 action, pivot pin 60 can slide in the connection elongated hole 5 on piston rod 1, when breaker open operation action, output shaft 7 drives output toggle arm 6 to be rotated counterclockwise, bearing pin 60 in the connection elongated hole 5 of piston rod 1 along piston rod to slide downward, do not come into operation at separating brake starting stage buffer like this, ensure that breaker open operation has very high movement velocity early stage, when bearing pin 60 slide into the connection elongated hole 5 of piston rod 1 bottom time, piston rod 1 is driven axially to move to cylinder base along airtight oil cylinder 2, shackle rod 8 is promoted while output toggle arm 6 counterclockwise rotates, thus drive the action of moving contact of breaker separating brake, when breaker closing moves, contrary with above-mentioned motion process, repeat no more herein.
Sealed by seal cover 3 between piston rod 1 and airtight oil cylinder 2, seal cover 3 has the excircle coincide with the opening inside diameter of airtight oil cylinder 2, this excircle is provided with the mounting groove 33 for installing seal washer, the center of seal cover 3 is provided with to be passed and the connecting hole be slidably matched that leads with piston rod 1 for piston rod 1, the inwall of connecting hole is provided with three mounting grooves for shape sealing ring 31, the open front of airtight oil cylinder 2 is provided with the annular groove for installing back-up ring 32, block and spacing is carried out by loading back-up ring 32 pairs of seal covers 3 in annular groove when seal cover 3 loads in the inner chamber of airtight oil cylinder 2.
One end that piston rod 1 stretches into the inner chamber of airtight oil cylinder 2 is provided with piston 11, piston 11 is greater than the cylindrical piston head of piston rod 1 for radial dimension, the outer peripheral face circumference uniform intervals of piston head is provided with three suite faces, every suite face is by step surface 101, 102, 103, 104 compositions, wherein, step surface 101 to step surface 104 reduces successively apart from the distance in piston 11 axle center, step surface 104 is positioned at the one end bottom the close airtight oil cylinder 2 of piston 11, certainly, in other execution modes, curved surface can have one to two groups or more than four groups, every suite face can comprise at least two step surfaces, or curved surface also can be replaced by taper seat, also can offer wedge groove to replace in the periphery of piston.Often organizing a performance in circumferential direction between terrace is the outer circumference surface of cylindrical piston head, piston 11 is also provided with the oil through 4 at axially extended through piston 11 two ends.
The inner chamber of airtight oil cylinder 2 is divided into breeze way 202 and non-buffered section 201, wherein, breeze way 202 is positioned at the front end of airtight oil cylinder 2, breeze way 202 has column type inner chamber, the diameter of its inner chamber equals the maximum gauge of piston 11 and is slidably matched for leading with the outer circumference surface at the maximum gauge place on piston 11, non-buffered section 201 comprises the internal diameter periphery equal with the internal diameter of breeze way 202 21, on periphery 21, circumference is evenly equipped with four axially extended grooves 20, the bottom land of groove 20 is circular arc and the bottom land of four grooves is positioned at concentric circumferentially same with periphery 21, when piston 11 moves in non-buffered section 201, the excircle at periphery 21 and piston 11 maximum gauge place coincide and coordinates and lead that it moves, groove 20 makes the buffering at two ends oil axially circulate for the two ends being communicated with piston 11 can not produce resistance to the mobile of piston 11.
The operation principle of oil bumper of the present utility model: when separating brake moves, piston rod 1 stressed drive piston 11 is moved by the openend forward end of airtight oil cylinder 2, namely moved to breeze way 202 by non-buffered section 201, in non-buffered section 201 during motion, the two ends of piston 11 are communicated with owing to crossing oil groove 20, now, the resistance of motion that oil bumper produces piston 11 is very little even almost not to be had, when piston 11 is moved in breeze way 202 by non-buffered section 201, periphery due to piston 11 is provided with step surface 101, 102, 106, 104, and step surface 101, 102, 103, the distance of 104 distance piston axis reduces successively, like this along with piston 11 constantly enters breeze way 202, step surface 104, 103, 102, 101 enter breeze way successively, the oily gap of the mistake formed between the inner peripheral surface of piston 11 and breeze way 202 is more and more less, buffering oil in breeze way 202 is more and more less from crossing oily gap the buffering oil flow be discharged in non-buffered section 201, buffering oil in such breeze way 202 is increasing to the resistance of motion of piston 11, in the final stop motion of cushioned resistance lower piston rod increased gradually like this, reach the buffer requirements to circuit breaker.Simultaneously, in other embodiments, because the divide-shut brake speed of circuit breaker is different, the quality of contact and pull bar is different, different to the buffer requirements of buffer, the flow that can calculate buffering oily according to different buffer requirements offers different curved surfaces to realize optimized buffer effect at the excircle of piston; When closing a floodgate motion, piston 11 moves under the drive of piston rod 1 from breeze way 202 in non-buffered section 201, owing to piston 11 being also provided with axially through oil through 4, part buffering oil in non-buffered section 201 can enter breeze way by oil through 4, the oil-gap of crossing that part buffering oil is increased gradually by the periphery of piston 11 enters breeze way, very little on the combined floodgate movement velocity impact of piston like this, combined floodgate requirement can be met.
In the present embodiment, the inwall of the airtight oil cylinder in non-buffered section place have the spigot surface for guide piston and the oily oil groove excessively passed through of axially extended confession buffering, in other embodiments, non-buffered section can be set to the column type cylindrical shell that internal orifice dimension is greater than piston external diameter, now, piston needs leading to piston rod with the piston rod connecting hole coordinated that leads on seal cover when non-buffered section is moved.
The embodiment of a kind of oil bumper of the present utility model: as Figure 1-4, its concrete structure is identical with the oil bumper structure in above-mentioned high voltage DC breaker, repeats no more herein.
Oil bumper structure of the present utility model is simple, and manufacture difficulty is lower, easy to maintenance, has higher useful life, and the airtight oil cylinder inside of oil bumper does not have the moving parts of small volume, is not easy to damage.
Claims (10)
1.
oil bumper, the sealed cylinder extended before and after comprising and leading the piston be slidably matched with sealed cylinder, buffering oil is full of in sealed cylinder, it is characterized in that, the front end of described sealed cylinder is provided with for being led the breeze way be slidably matched with piston external diameter, and the outer peripheral face of described piston is provided with along the retracted orientation of piston the buffering curved surface that the gap when moving in breeze way and between the internal face of breeze way increases gradually.
2.
oil bumper according to claim 1, is characterized in that, described buffering curved surface has multiple and circumference to be disposed on piston.
3.
oil bumper according to claim 2, is characterized in that, described buffering curved surface comprises the stepped plane of two or more.
4.
oil bumper according to claim 1-3 any one, it is characterized in that, described piston is provided with non-buffered section in the rear side of breeze way, described non-buffered section has for the identical spigot surface of the outer circumference surface at the maximum outside diameter place with piston, and described spigot surface is provided with the axially extended of indent and crosses oil groove.
5.
oil bumper according to claim 4, is characterized in that, described piston is provided with the oil through at axially through piston two ends.
6.
high voltage DC breaker, comprise operating mechanism, described operating mechanism upper driving is connected with oil bumper, described oil bumper comprises sealed cylinder and to lead the piston be slidably matched with sealed cylinder, buffering oil is full of in sealed cylinder, it is characterized in that, the front end of described sealed cylinder is provided with for being led the breeze way be slidably matched with piston external diameter, and the outer peripheral face of described piston is provided with along the retracted orientation of piston the buffering curved surface that the gap when moving in breeze way and between the internal face of breeze way increases gradually.
7.
high voltage DC breaker according to claim 6, is characterized in that, described buffering curved surface has multiple and circumference to be disposed on piston.
8.
high voltage DC breaker according to claim 7, is characterized in that, described buffering curved surface comprises the stepped plane of two or more.
9.
high voltage DC breaker according to claim 6-7 any one, it is characterized in that, described piston is provided with non-buffered section in the rear side of breeze way, described non-buffered section has for the identical spigot surface of the outer circumference surface at the maximum outside diameter place with piston, and described spigot surface is provided with the axially extended of indent and crosses oil groove.
10.
high voltage DC breaker according to claim 9, is characterized in that, described piston is provided with the oil through at axially through piston two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686484.5U CN204270911U (en) | 2014-11-17 | 2014-11-17 | Oil bumper and high voltage DC breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686484.5U CN204270911U (en) | 2014-11-17 | 2014-11-17 | Oil bumper and high voltage DC breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204270911U true CN204270911U (en) | 2015-04-15 |
Family
ID=52805764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420686484.5U Active CN204270911U (en) | 2014-11-17 | 2014-11-17 | Oil bumper and high voltage DC breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204270911U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377055A (en) * | 2014-11-17 | 2015-02-25 | 河南平高电气股份有限公司 | Oil buffer and high-voltage direct-current breaker |
| CN114664582A (en) * | 2021-12-24 | 2022-06-24 | 平高集团有限公司 | Breaker operating mechanism opening buffer |
-
2014
- 2014-11-17 CN CN201420686484.5U patent/CN204270911U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377055A (en) * | 2014-11-17 | 2015-02-25 | 河南平高电气股份有限公司 | Oil buffer and high-voltage direct-current breaker |
| CN114664582A (en) * | 2021-12-24 | 2022-06-24 | 平高集团有限公司 | Breaker operating mechanism opening buffer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |