CN103670456A - Mining hydraulic prop for magnetic liquid sealing - Google Patents
Mining hydraulic prop for magnetic liquid sealing Download PDFInfo
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- CN103670456A CN103670456A CN201310584209.2A CN201310584209A CN103670456A CN 103670456 A CN103670456 A CN 103670456A CN 201310584209 A CN201310584209 A CN 201310584209A CN 103670456 A CN103670456 A CN 103670456A
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- magnetic pole
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- ring
- hydraulic prop
- handle body
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Abstract
The invention discloses a mining hydraulic prop for magnetic liquid sealing. The hydraulic prop is characterized in that a magnetic sealing part is arranged between a Y-shaped sealing ring (6) and the upper end of a handgrip body (18) and comprises a lower magnetic pole (14), a permanent magnet (15), an upper magnetic pole (16) and a magnetic separation ring (17); the upper magnetic pole and the lower magnetic pole are axially arranged along a plunger (12) up and down respectively; the upper magnetic pole, the lower magnetic pole and the plunger are in clearance fit; inner grooves are formed in the inner annular surface of the upper magnetic pole and the inner annular surface of the lower magnetic pole and filled with magnetic liquid (13); the permanent magnet is installed between the upper magnetic pole and the lower magnetic pole; the inner diameter and the outer diameter of the permanent magnet are the same as the inner diameter and the outer diameter of the upper magnetic pole and the inner diameter and the outer diameter of the lower magnetic pole; the magnetic separation ring is arranged between the permanent magnet and the handgrip body; a gland (10) is fixed to the handgrip body through a flat washer (8) and a bolt (9). The sealing performance of the hydraulic prop can be improved, and emulsion leakage caused by surface damage of the plunger is effectively avoided.
Description
Technical field
The present invention relates to a kind of hydraulic prop for mine of magnetic fluid sealing, belong to force piece technical field.
Background technology
Floated type single hydraulic prop stay has overcome leakage and the little deficiency of supporting scope of the piston hydraulic single prop existence of using at present both at home and abroad, be applicable to roof timbering and the termination roof timbering of stope working surface of coal mines, its supporting capacity is large, offset load resistance is strong, impulse stroke is large, the scope of application is wide, thereby it can be applicable to girdle, medium-thickness seam and thick coal seam work plane.Existing hydraulic prop all adopts y-shaped ring sealing, but hydraulic prop is when blast mining face plays support action, easily be subject to big gun and collapse the slag impact causing, make the post overlay coating alive of the pillar formation hollow that sustains damage, the complicated rugged environment in down-hole more can make the hollow aggravation diffusion of post alive surface, this causes between post alive and hermetically-sealed construction and exists and leak, and greatly reduces bearing capacity and the high pressure sealing performance of hydraulic prop, and top casualty accident even collapses.
In engineering reality, for improving hydraulic prop sealing performance, often the post of living carried out to coating intensive treatment or adopt additional sleeve to protect post alive surface, having increased processing and manufacturing cost, improving sealing performance limited.So, how better to improve the sealing performance of hydraulic prop for mine, become coal industry field supporting field problem demanding prompt solution.
Summary of the invention
For the problem of above-mentioned prior art existence, the invention provides a kind of hydraulic prop for mine of magnetic fluid sealing, can compensate the hollow on the post surface of living, guarantee the sealing effectiveness of living between post and hermetically-sealed construction.
To achieve these goals, the technical solution used in the present invention is: a kind of hydraulic prop for mine of magnetic fluid sealing, comprises oil cylinder, post alive and handle body; The column sleeve of living is embedded in oil cylinder inside, handle body is connected with oil cylinder by connecting steel wire, and by O-ring seals and retaining ring sealing, between handle body and post alive, be provided with guide ring, between handle body and post alive, y-shaped ring is housed, between y-shaped ring and post alive, is also provided with anti-extrusion ring, also comprise magnetic seal parts and gland, these magnetic seal parts are arranged between described y-shaped ring and handle body upper end, and magnetic seal parts comprise lower magnetic pole, permanent magnet, upper magnetic pole and magnetism-isolating loop; Upper magnetic pole and lower magnetic pole are axial arranged along the post of living one on the other, upper magnetic pole and lower magnetic pole and the post matched in clearance of living, upper magnetic pole and lower magnetic pole inner ring surface offer inside groove, in inside groove, be filled with magnetic liquid, permanent magnet is arranged between magnetic pole and lower magnetic pole, the internal-and external diameter of permanent magnet is identical with the internal-and external diameter of upper magnetic pole, lower magnetic pole, and magnetism-isolating loop is arranged between permanent magnet and handle body, and gland is by plain washer and being bolted on handle body.
Further, the inside groove number that upper magnetic pole inner ring surface is offered is less than the inside groove number that lower magnetic pole inner ring surface is offered.
Further, also comprise C type dust-proof seal ring, C type dust-proof seal ring is arranged in gland internal bore groove.
Further, between bolt and gland, elastic washer is set.
Further, the inside groove number that lower magnetic pole inner ring surface is offered is 2-8.
The invention has the beneficial effects as follows: outside the Y shape sealing between existing pillar handle body and post alive, increased magnetic seal parts, magnetic seal parts adopt magnetic fluid sealing, after permanent magnet magnetizes, the magnetic liquid injecting is under the effect in magnetic field, be adsorbed on upper and lower two magnetic pole inside grooves and live between post, along with magnetic liquid viscosity increases, form positiver sealing, magnetic liquid has sealing compensation effect, improve hydraulic prop sealing performance, effectively prevent the emulsion leakage that major gene surface damage alive causes.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of A portion in Fig. 1.
In figure: 1, oil cylinder, 2, connect steel wire, 3, back-up ring, 4, O-ring seals, 5, guide ring, 6, y-shaped ring, 7, anti-extrusion ring, 8, plain washer, 9, bolt, 10, gland, 11, C type dust-proof seal ring, 12, the post of living, 13, magnetic liquid, 14, lower magnetic pole, 15, permanent magnet, 16, upper magnetic pole, 17, magnetism-isolating loop, 18, handle body.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As depicted in figs. 1 and 2, the hydraulic prop for mine of this magnetic fluid sealing, comprises oil cylinder 1, post 12 alive and handle body 18, the post 12 of living is embedded in oil cylinder 1 inside, handle body 18 is connected with oil cylinder 1 by connecting steel wire 2, and by O-ring seals 4 and back-up ring 3 sealings, between handle body 18 and post 12 alive, be provided with guide ring 5, between handle body 18 and post 12 alive, y-shaped ring 6 is housed, between y-shaped ring 6 and post 12 alive, be also provided with anti-extrusion ring 7, also comprise magnetic seal parts and gland 10, these magnetic seal parts are arranged between described y-shaped ring 6 and handle body 18 upper ends, and magnetic seal parts comprise lower magnetic pole 14, permanent magnet 15, upper magnetic pole 16 and magnetism-isolating loop 17, upper magnetic pole 16 and lower magnetic pole 14 are axial arranged along the post 12 of living one on the other, upper magnetic pole 16 and lower magnetic pole 14 and post 12 matched in clearance of living, the post 12 of living is magnetic conductive media, upper magnetic pole 16 and lower magnetic pole 14 inner ring surfaces offer inside groove, in inside groove, be filled with magnetic liquid 13, permanent magnet 15 is arranged between magnetic pole 16 and lower magnetic pole 14, the internal-and external diameter of permanent magnet 15 and upper magnetic pole 16, the internal-and external diameter of lower magnetic pole 14 is identical, magnetism-isolating loop 17 is arranged between permanent magnet 15 and handle body 18, magnetism-isolating loop 17 separates permanent magnet 15 and handle body 18, increased the magnetic resistance of magnetic circuit, guarantee that magnetic circuit concentrates on magnetic pole and lives in post 12, after permanent magnet 15 magnetizes, the magnetic liquid 13 injecting is under the effect in magnetic field, be adsorbed on upper and lower two magnetic pole inside grooves and live between post 12, along with magnetic liquid 13 viscosity increase, form positiver sealing, gland 10 is fixed on handle body 18 by plain washer 8 and bolt 9.
The inside groove number that upper magnetic pole 16 inner ring surfaces are offered is less than the inside groove number that lower magnetic pole 14 inner ring surfaces are offered, upper magnetic pole 16 and lower magnetic pole 14 inside groove numbers can be identical can be different, but the outstanding upper magnetic pole 16 inside groove numbers of the present invention are less than lower magnetic pole 14 inside grooves and count main cause and be: lower magnetic pole 14 mainly works the emulsion effect that seals, prevent that emulsion from leaking, upper magnetic pole 16 mainly plays 13 effects of auxiliary seal magnetic liquid, prevent that magnetic liquid 13 under high pressure overflowing, so this structure makes the present invention more reasonable aspect under high pressure overflowing at anti-dielectric leakage and magnetic liquid 13.
C type dust-proof seal ring 11 is arranged in gland 10 internal bore grooves, C type dust-proof seal ring 11 is positioned at the top of magnetic liquid sealing structure, plays on the one hand auxiliary carrying sealing function, prevents overflowing of magnetic liquid 13, play on the other hand dustproof effect, prevent the work of coal dust congestion affects pillar.
In order to prevent bolt looseness, between bolt 9 and gland 10, elastic washer is set.In order to make magnetic fluid sealing better effects if of the present invention, the inside groove number that lower magnetic pole 14 inner ring surfaces are offered is 2-8.
Claims (5)
1. a hydraulic prop for mine for magnetic fluid sealing, comprises oil cylinder (1), post (12) alive and handle body (18); The post (12) of living is embedded in oil cylinder (1) inside, handle body (18) is connected with oil cylinder (1) by connecting steel wire (2), and by O-ring seals (4) and back-up ring (3) sealing, between handle body (18) and post alive (12), be provided with guide ring (5), between handle body (18) and post alive (12), y-shaped ring (6) is housed, between y-shaped ring (6) and post alive (12), be also provided with anti-extrusion ring (7), it is characterized in that
Also comprise magnetic seal parts and gland (10), these magnetic seal parts are arranged between described y-shaped ring (6) and handle body (18) upper end, and magnetic seal parts comprise lower magnetic pole (14), permanent magnet (15), upper magnetic pole (16) and magnetism-isolating loop (17), upper magnetic pole (16) and lower magnetic pole (14) are axial arranged along the post (12) of living one on the other, upper magnetic pole (16) and lower magnetic pole (14) and post (12) matched in clearance of living, upper magnetic pole (16) and lower magnetic pole (14) inner ring surface offer inside groove, in inside groove, be filled with magnetic liquid (13), permanent magnet (15) is arranged between magnetic pole (16) and lower magnetic pole (14), the internal-and external diameter of permanent magnet (15) and upper magnetic pole (16), the internal-and external diameter of lower magnetic pole (14) is identical, magnetism-isolating loop (17) is arranged between permanent magnet (15) and handle body (18), gland (10) is fixed on handle body (18) by plain washer (8) and bolt (9).
2. the hydraulic prop for mine of a kind of magnetic fluid sealing according to claim 1, is characterized in that, the inside groove number that described upper magnetic pole (16) inner ring surface is offered is less than the inside groove number that lower magnetic pole (14) inner ring surface is offered.
3. the hydraulic prop for mine of a kind of magnetic fluid sealing according to claim 1, is characterized in that, also comprises C type dust-proof seal ring (11), and C type dust-proof seal ring (11) is arranged in gland (10) internal bore groove.
4. according to the hydraulic prop for mine of a kind of magnetic fluid sealing described in the arbitrary claim of claim 1-3, it is characterized in that, between described bolt (9) and gland (10), elastic washer is set.
5. the hydraulic prop for mine of a kind of magnetic fluid sealing according to claim 2, is characterized in that, the inside groove number that described lower magnetic pole (14) inner ring surface is offered is 2-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310584209.2A CN103670456B (en) | 2013-11-20 | 2013-11-20 | A kind of hydraulic prop for mine of magnetic fluid sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310584209.2A CN103670456B (en) | 2013-11-20 | 2013-11-20 | A kind of hydraulic prop for mine of magnetic fluid sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103670456A true CN103670456A (en) | 2014-03-26 |
| CN103670456B CN103670456B (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310584209.2A Active CN103670456B (en) | 2013-11-20 | 2013-11-20 | A kind of hydraulic prop for mine of magnetic fluid sealing |
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| Country | Link |
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| CN (1) | CN103670456B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840829A (en) * | 2016-04-11 | 2016-08-10 | 中国矿业大学 | Impact-rotary high-pressure sealing device |
| WO2021115025A1 (en) * | 2019-12-10 | 2021-06-17 | 新昌县陆恒机械有限公司 | Suspended unit hydraulic apparatus for mining |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05141536A (en) * | 1991-11-18 | 1993-06-08 | Fuji Electric Co Ltd | Magnetic fluid sealing device |
| US20110193292A1 (en) * | 2010-02-11 | 2011-08-11 | Beijing Jiaotong University | Magnetic fluid sealing and packing ring sealing device for reciprocating shaft with the packing ring having three oblique mouths |
| CN202007675U (en) * | 2011-04-14 | 2011-10-12 | 湖南三都煤矿设备制造有限公司 | Individual hydraulic prop used on underground mining working surface |
| CN102537366A (en) * | 2012-01-05 | 2012-07-04 | 北京交通大学 | Sealing method for split type magnetic liquid sealing device |
| CN103343822A (en) * | 2013-07-05 | 2013-10-09 | 北京交通大学 | Magnetic liquid rotating sealing device suitable for space station |
| CN203655313U (en) * | 2013-11-20 | 2014-06-18 | 中国矿业大学 | Mine hydraulic supporting column sealed by magnetic liquid |
-
2013
- 2013-11-20 CN CN201310584209.2A patent/CN103670456B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05141536A (en) * | 1991-11-18 | 1993-06-08 | Fuji Electric Co Ltd | Magnetic fluid sealing device |
| US20110193292A1 (en) * | 2010-02-11 | 2011-08-11 | Beijing Jiaotong University | Magnetic fluid sealing and packing ring sealing device for reciprocating shaft with the packing ring having three oblique mouths |
| CN202007675U (en) * | 2011-04-14 | 2011-10-12 | 湖南三都煤矿设备制造有限公司 | Individual hydraulic prop used on underground mining working surface |
| CN102537366A (en) * | 2012-01-05 | 2012-07-04 | 北京交通大学 | Sealing method for split type magnetic liquid sealing device |
| CN103343822A (en) * | 2013-07-05 | 2013-10-09 | 北京交通大学 | Magnetic liquid rotating sealing device suitable for space station |
| CN203655313U (en) * | 2013-11-20 | 2014-06-18 | 中国矿业大学 | Mine hydraulic supporting column sealed by magnetic liquid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840829A (en) * | 2016-04-11 | 2016-08-10 | 中国矿业大学 | Impact-rotary high-pressure sealing device |
| CN105840829B (en) * | 2016-04-11 | 2017-08-18 | 中国矿业大学 | One kind impact rotary high pressure sealing device |
| WO2021115025A1 (en) * | 2019-12-10 | 2021-06-17 | 新昌县陆恒机械有限公司 | Suspended unit hydraulic apparatus for mining |
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| Publication number | Publication date |
|---|---|
| CN103670456B (en) | 2016-01-20 |
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