CN102927283A - Sealing device for transmission input shafts in vacuum environment and using method of sealing device - Google Patents
Sealing device for transmission input shafts in vacuum environment and using method of sealing device Download PDFInfo
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- CN102927283A CN102927283A CN2012104432147A CN201210443214A CN102927283A CN 102927283 A CN102927283 A CN 102927283A CN 2012104432147 A CN2012104432147 A CN 2012104432147A CN 201210443214 A CN201210443214 A CN 201210443214A CN 102927283 A CN102927283 A CN 102927283A
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Abstract
The invention discloses a sealing device for transmission input shafts in a vacuum environment and a using method of the sealing device. The sealing device comprises a transmission input shaft, elastic shaft check rings, magnetic liquids, magnetic poles, magnets, O-shaped rings, special-made gaskets, outer casings, angular contact ball bearings, pairing ferrules, locking blocks, set screws with flat points, end caps, hexagon socket head cap screws, glue, lock nuts, V-shaped oil seals, a four-way connection block, a water outlet connector, a water inlet connector, a water delaying baffle block, outer water channel ferrule pieces and oil, wherein an oil seal limiting groove, check ring shaft grooves, magnetic liquid chambers, shaft shoulders, locking threads and equal division shaft kerfs are arranged on the transmission input shaft. According to the sealing device, novel magnetic fluid materials are applied for vacuum seal, a water cooling system is applied for cooling, by means of the sealing device, thermal damage is reduced in thermal field environments, magnetic effects of magnetism work pieces are improved, the vacuum sealing performance is good, and the sealing device can be used in vacuum sealing devices with higher vacuum requirements.
Description
Technical field
The vacuum seal problem of most critical when the power of the machinery that the present invention relates to work in vacuum environment is inputted, the problem that cools that also relates to the mechanical parts of working in the thermal field environment relates in particular to a kind of vacuum environment underdrive input shaft seal and using method thereof.
Background technique
The machinery of in the vacuum seal environment, working, the power that needs will be provided by the external world, in the process of transmission power in vacuum chamber, has the vacuum seal problem, and particularly for the transmission shaft that is rotating, vacuum seal is a stubborn problem especially.The method of conventional solution sealing is to adopt multistage dense seal sealing, but for the vacuum seal of having relatively high expectations, for example the degree of vacuum of single crystal growing environment requires at 99 percent more than 99, adopt the multistage dense seal to realize sealing, difficulty is very large, may need to adopt the multistage dense seal just can reach the degree of vacuum requirement, but under limited space, can't realize.Progress along with in recent years scientific research, people extensively use the effect in magnetic field, find that magnetic fluid can be used for sealing, but in concrete use, the O type circle of commonly using unlike us is so simple, owing to being liquid, consider flowing and sealing of it, again owing to will utilize its magnetic, consider the magnetic patch magnetic pole that matches with it, relative position etc., different spaces, different mounting points all can affect the sealing effect of magnetic fluid.Because magnet fluid sealing is worked under the thermal field environment of being everlasting, correlated parts easily is subject to cause thermal damage, affects the magnetic effect of magnetic work part, reduction of service life again.
Summary of the invention
The objective of the invention is in order to overcome the deficiencies in the prior art, a kind of vacuum environment underdrive input shaft seal and using method thereof are provided.
A kind of vacuum environment underdrive input shaft seal, comprise transmission input shaft, circlip for shaft, magnetic liquid, magnetic pole, magnetic patch, O type circle, extraordinary packing ring, frame, angular contact ball bearing, pairing lasso, locking block, flush end mark closely screw, end cap, hexagon socket cap head screw, glue, locking nut, V-type oil sealing, four-way connect piece, titting water outlet, fill hose joint, slow water block, water channel outer hoop sheet, grease, vacuum-sealed cavity, oil sealing restraining groove, back-up ring axial trough, magnetic liquid chamber, the shaft shoulder, locking screw and etc. the split axle joint-cutting; Circlip for shaft is contained on the back-up ring axial trough of transmission input shaft, magnetic liquid is coated in the magnetic liquid chamber of transmission input shaft, two magnetic poles are sleeved on the position that is coated with magnetic liquid of transmission input shaft, O type snare is contained in the seal groove on the external cylindrical surface of two magnetic poles, magnetic patch is sleeved on the transmission input shaft, and be between two magnetic poles, special gasket sleeve is contained on the transmission input shaft, its face contacts with the end of magnetic pole, another face contacts with the end of angular contact ball bearing, frame is sleeved on outside the transmission input shaft, and form cavity with the outer surface of transmission input shaft, three diagonal angle contact ball bearings are housed in cavity, wherein between the two following diagonal angle contact ball bearings pairing lasso is housed, locking nut is contained in the position of the locking screw of transmission input shaft, be pressed on the inner ring of angular contact ball bearing, two locking blocks are contained in two lateral aperture of locking nut, being marked closely screw by flush end is pressed on the transmission input shaft, end cap is pressed on the outer ring of angular contact ball bearing, be fixed on the end face of frame by hexagon socket cap head screw, the V-type oil-sealing sleeve is contained on the transmission input shaft, be in the two ends of frame, four-way connects the gentle water block of piece and is welded in the water channel groove on the frame, water channel outer hoop sheet is welded on the water channel groove lateral port on the frame, flush with the cylndrical surface of frame, and form impermeable flow channel with frame, titting water outlet and fill hose joint are contained in respectively four-way and connect on the water outlet and water intake on the piece, coat respectively corresponding grease when mounting O-shaped rings and angular contact ball bearing.
The outer surface of described transmission input shaft 1 and end be provided with successively oil sealing restraining groove, back-up ring axial trough, magnetic liquid chamber, the shaft shoulder, locking screw and etc. the split axle joint-cutting; The oil sealing restraining groove is located at the left part of transmission input shaft, the back-up ring axial trough is located at the right side of oil sealing restraining groove, the magnetic liquid chamber is located at the right side of back-up ring axial trough, the shaft shoulder is located at the right side of magnetic liquid chamber, locking screw is located at the stage casing right part of transmission input shaft, waits the split axle joint-cutting to be positioned at the right part of transmission input shaft.
Described frame, four-way connect piece, titting water outlet, fill hose joint, slow water block and water channel outer hoop sheet and form water cooling system; Before to frame fine finishing, the weldment of water cooling system will be integrally welded, titting water outlet and fill hose joint are contained in four-way to be connect on the piece, external cylindrical surface in the middle and upper part of frame is provided with tank, in tank, be welded with four-way and connect piece and three slow water blocks, they are 90 ° and evenly distribute, and are welded with water channel outer hoop sheet at the lateral port of groove.
The using method of described vacuum environment underdrive input shaft seal, the upper-end surface of sealing device is docked fixing with vacuum-sealed cavity, magnetic liquid, magnetic pole and magnetic patch form magnetic field around the transmission input shaft, and be on the shaft section at magnetic liquid and magnetic pole place, the magnetic line of force has formed sealing surface in this cross section, stop the circulation of transmission input shaft ambient air, play seal action; The sealing device is provided with two pairs of magnetic liquids and magnetic pole, and secondary seal is implemented in the magnetic field that makes it to produce, and no matter whether the transmission input shaft rotates, or how high rotating speed is, and seal action all can exist always, is not affected; When the sealing device is used in the thermal field, open water inlet switch, make cooling water enter cooling system from fill hose joint, in the body of frame, be centered around two-stage magnetic pole and magnetic patch around, flow out from titting water outlet through three grades of slow water blocks, this water-cooling circulating system has played the effect that cools to major part magnetic pole, magnetic patch and the frame of this device.
Beneficial effect of the present invention: used novel magnetic fluid material to carry out vacuum seal, simultaneously used again water cooling system to carry out cooling heat dissipation, compact structure, vacuum leakproofness is good, can apply on the vacuum seal device that degree of vacuum has relatively high expectations, even in the thermal field environment, the vacuum seal performance is also unaffected; Overcome the impact that magnet fluid sealing is operated in suffered thermal field in the thermal field environment, reduced the cause thermal damage of the workpieces such as magnetic fluid and magnetic pole magnetic patch, improved the magnetic effect of magnetic work part, and prolong its working life.
Description of drawings
Fig. 1 is the structural representation of vacuum environment underdrive input shaft seal;
Fig. 2 is frame weldment structural representation of the present invention;
Fig. 3 is that the A-A section cooling water flow of frame weldment of the present invention is to schematic diagram;
Fig. 4 is transmission input shaft structure schematic diagram of the present invention;
Fig. 5 is the B place enlarged view among Fig. 4;
Fig. 6 is the C place enlarged view among Fig. 4;
Fig. 7 is that four-way of the present invention connects the block structure schematic diagram;
Among the figure: transmission input shaft 1, circlip for shaft 2, magnetic liquid 3, magnetic pole 4, magnetic patch 5, O type circle 6, extraordinary packing ring 7, frame 8, angular contact ball bearing 9, pairing lasso 10, locking block 11, flush end is marked closely screw 12, end cap 13, hexagon socket cap head screw 14, glue 15, locking nut 16, V-type oil sealing 17, four-way connects piece 18, titting water outlet 19, fill hose joint 20, slow water block 21, water channel outer hoop sheet 22, grease 23, vacuum-sealed cavity 24, oil sealing restraining groove 25, back-up ring axial trough 26, magnetic liquid chamber 27, the shaft shoulder 28, locking screw 29 and joint-cutting such as split axle such as grade 30.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As Figure 1-3, be used for vacuum environment underdrive input shaft seal and comprise transmission input shaft 1, circlip for shaft 2, magnetic liquid 3, magnetic pole 4, magnetic patch 5, O type circle 6, extraordinary packing ring 7, frame 8, angular contact ball bearing 9, pairing lasso 10, locking block 11, flush end is marked closely screw 12, end cap 13, hexagon socket cap head screw 14, glue 15, locking nut 16, V-type oil sealing 17, four-way connects piece 18, titting water outlet 19, fill hose joint 20, slow water block 21, water channel outer hoop sheet 22, grease 23, vacuum-sealed cavity 24, oil sealing restraining groove 25, back-up ring axial trough 26, magnetic liquid chamber 27, the shaft shoulder 28, locking screw 29 and joint-cutting such as split axle such as grade 30; Circlip for shaft 2 is contained on the back-up ring axial trough 26 of transmission input shaft 1, magnetic liquid 3 is coated in the magnetic liquid chamber 27 of transmission input shaft 1, two magnetic poles 4 are sleeved on the position that is coated with magnetic liquid 3 of transmission input shaft 1, O type circle 6 is sleeved in the seal groove on the external cylindrical surface of two magnetic poles 4, magnetic patch 5 is sleeved on the transmission input shaft 1, and be between two magnetic poles 4, special packing ring 7 is sleeved on the transmission input shaft 1, its face contacts with the end of magnetic pole 4, another face contacts with the end of angular contact ball bearing 9, frame 8 is sleeved on outside the transmission input shaft 1, and form certain space with the outer surface of transmission input shaft 1, three diagonal angle contact ball bearings 9 are housed in the space, pairing lasso 10 wherein is housed between the two following diagonal angle contact ball bearings 9, locking nut 16 is contained in the position of the locking screw 29 of transmission input shaft 1, be pressed on the inner ring of angular contact ball bearing 9, two locking blocks 11 are contained in two lateral aperture of locking nut 16, being marked closely screw 12 by flush end is pressed on the transmission input shaft 1, end cap 13 is pressed on the outer ring of angular contact ball bearing 9, be fixed on the end face of frame 8 by hexagon socket cap head screw 14, V-type oil sealing 17 is sleeved on the transmission input shaft 1, be in the two ends of frame 8, four-way connects the gentle water blocks 21 of piece 18 and is welded in the water channel groove on the frame 8, water channel outer hoop sheet 22 is welded on the water channel groove lateral port on the frame 8, flush with the cylndrical surface of frame 8, and form impermeable flow channel with frame 8, titting water outlet 19 and fill hose joint 20 are contained in respectively four-way and connect on the water outlet and water intake on the piece 18, coat respectively corresponding grease 23 when mounting O-shaped rings 6 and angular contact ball bearing 9.
Transmission input shaft 1(Fig. 4-6) be the major part of this device, outer surface and end at it are provided with difform groove and the shaft shoulder, to reach different usage requirements, they be successively oil sealing restraining groove 25, back-up ring axial trough 26, magnetic liquid chamber 27, the shaft shoulder 28, locking screw 29 and etc. split axle joint-cutting 30, see accompanying drawing 4 for details.Oil sealing restraining groove 25 is located at the left part of transmission input shaft 1, and Main Function is the mounting point of restriction V-type oil sealing 17, and in the end of transmission input shaft 1, the left side of oil sealing restraining groove 25 is provided with 20 ° chamfering, is convenient to the installation of V-type oil sealing, and detail drawing as shown in Figure 6.Back-up ring axial trough 26 is located at the right side of oil sealing restraining groove 25, is used for installing circlip for shaft 2, for frame 8 provides axially locating.Magnetic liquid chamber 27 is located at the right side of back-up ring axial trough 26, formed by two groups of nine ring type deep troughs, detail drawing as shown in Figure 5, its effect is used for splendid attire magnetic liquid 3, every group width matches with the width of corresponding magnetic pole 4, and the quantity of ring type deep trough and width are by the viscosity of the magnetic liquid 3 of splendid attire and fluidity determining, and magnetic liquid chamber 27 is divided into several narrow chambers, purpose is to reduce magnetic liquid 3 in axial flowing when 1 rotation of transmission input shaft.The shaft shoulder 28 is located at the right side of magnetic liquid chamber 27, is mainly established angle contact ball bearing 9 axially locating is provided.Locking screw 29 is located at the stage casing right part of transmission input shaft 1, is to fill locking nut 16, compression angular contact ball bearing 9 inner rings.Being positioned at the right part of transmission input shaft 1 Deng split axle joint-cutting 30, is that the axle head with interior sky cuts several axial joint-cuttings, to strengthen the radial elastic of axle head.
The water cooling system of this device mainly connects piece 18, titting water outlet 19, fill hose joint 20, slow water block 21 and water channel outer hoop sheet 22 by frame 8, four-way and forms, and sees accompanying drawing 3 for details.Before to frame 8 fine finishing, the weldment of water cooling system will be integrally welded, titting water outlet 19 and fill hose joint 20 is contained in four-way connect on the piece 18, and the water-stop of each weld seam is guaranteed in the test of leaking.Frame 8 is strength members, and it is not only carrying transmission input shaft 1 and is connected the transitional function that connects with vacuum-sealed cavity, but also is forgiving most of part of this device, also provides flow channel for water cooling system.External cylindrical surface in the middle and upper part of frame 8 is provided with the tank of certain width, in tank, be welded with four-way and connect piece 18 and three slow water blocks 21, they are 90 ° and evenly distribute, lateral port at groove, be welded with water channel outer hoop sheet 22, because water channel outer hoop sheet 22 is arcs, can consider segmentation, burst during welding, as long as guarantee the continuity of weld seam, make it and frame 8 and four-way connect the flow channel of piece 18 formation water-tight.Four-way meets piece 18(and sees accompanying drawing 7 for details) be the weldment of a four-way, tank on its boundary dimension and the frame 8 matches, three faces at it are distributed with four holes, two pairs vertically communicate, wherein, two holes on the cylindrical side are tapped holes, are used for respectively attaching titting water outlet 19 and fill hose joint 20, and two holes on two other side communicate with the cavity that frame 8 and water channel outer hoop sheet 22 form.Slow water block 21 is plate shape pieces that there is the water port at the center, and its effect mainly is to strengthen water channel outer hoop sheet 22 and slow down that cooling water is too urgent to be passed through, in the water-saving purpose that reaches simultaneously heat exchange.
The vacuum environment underdrive is inputted the using method of shaft seal: the upper-end surface of this device is docked with vacuum-sealed cavity fix, guarantee this surface of contact vacuum seal.Because the high magnetic that magnetic liquid 3, magnetic pole 4 and magnetic patch 5 have, when they are loaded onto transmission input shaft 1, just formed magnetic field, because magnetic liquid 3 and magnetic pole 4 are encircled the relative position of installation, form the direction in magnetic field on the shaft section at magnetic liquid 3 and magnetic pole 4 places, the magnetic line of force has formed sealing surface in this cross section, has stoped the circulation of transmission input shaft 1 ambient air, has played the effect of sealing.In order to reach better sealing effect, in this device, be provided with two pairs of magnetic liquids 3 and magnetic pole 4, make it to carry out secondary seal.The sealing utilization here be the magnetic field that produces between magnetic liquid 3 and the magnetic pole 4, therefore, no matter whether transmission input shaft 1 rotates, or how high rotating speed is, seal action all can exist always, is not affected.When 1 rotation of transmission input shaft, formed one deck liquid level protective film by magnetic liquid 3 between transmission input shaft 1 and the magnetic pole 4, to the two effect of having played protection, reduced frictionally damage.
When this device is used in the thermal field, open water inlet switch, make cooling water enter cooling system from fill hose joint 20, along the flow direction as shown in Figure 3, in the body of frame 8, be centered around two-stage magnetic pole 4 and magnetic patch 5 around, flow out from titting water outlet 19 through three grades of slow water blocks 21.The water circulation constantly of flowing slowly cools to major part magnetic pole 4, magnetic patch 5 and the frame 8 of this device, makes it to avoid cause thermal damage.
Claims (4)
1. a vacuum environment underdrive is inputted shaft seal, it is characterized in that, it comprises transmission input shaft (1), circlip for shaft (2), magnetic liquid (3), magnetic pole (4), magnetic patch (5), O type circle (6), extraordinary packing ring (7), frame (8), angular contact ball bearing (9), pairing lasso (10), locking block (11), flush end is marked closely screw (12), end cap (13), hexagon socket cap head screw (14), glue (15), locking nut (16), V-type oil sealing (17), four-way connects piece (18), titting water outlet (19), fill hose joint (20), slow water block (21), water channel outer hoop sheet (22), grease (23), vacuum-sealed cavity (24), oil sealing restraining groove (25), back-up ring axial trough (26), magnetic liquid chamber (27), the shaft shoulder (28), locking screw (29) and etc. split axle joint-cutting (30); Circlip for shaft (2) is contained on the back-up ring axial trough (26) of transmission input shaft (1), magnetic liquid (3) is coated in the magnetic liquid chamber (27) of transmission input shaft (1), two magnetic poles (4) are sleeved on the position that is coated with magnetic liquid (3) of transmission input shaft (1), O type circle (6) is sleeved in the seal groove on the external cylindrical surface of two magnetic poles (4), magnetic patch (5) is sleeved on the transmission input shaft (1), and be between two magnetic poles (4), special packing ring (7) is sleeved on the transmission input shaft (1), its face contacts with the end of magnetic pole (4), another face contacts with the end of angular contact ball bearing (9), frame (8) is sleeved on outside the transmission input shaft (1), and form cavity with the outer surface of transmission input shaft (1), three diagonal angle contact ball bearings (9) are housed in cavity, pairing lasso (10) wherein is housed between the two following diagonal angle contact ball bearings (9), locking nut (16) is contained in the position of the locking screw (29) of transmission input shaft (1), be pressed on the inner ring of angular contact ball bearing (9), two locking blocks (11) are contained in two lateral aperture of locking nut (16), being marked closely screw (12) by flush end is pressed on the transmission input shaft (1), end cap (13) is pressed on the outer ring of angular contact ball bearing (9), be fixed on the end face of frame (8) by hexagon socket cap head screw (14), V-type oil sealing (17) is sleeved on the transmission input shaft (1), be in the two ends of frame (8), four-way connects the gentle water block (21) of piece (18) and is welded in the water channel groove on the frame (8), water channel outer hoop sheet (22) is welded on the water channel groove lateral port on the frame (8), flush with the cylndrical surface of frame (8), and form impermeable flow channel with frame (8), titting water outlet (19) and fill hose joint (20) are contained in respectively four-way and connect on the water outlet and water intake on the piece (18), coat respectively corresponding grease (23) when mounting O-shaped rings (6) and angular contact ball bearing (9).
2. according to claim 1 for vacuum environment underdrive input shaft seal, it is characterized in that, the outer surface of described transmission input shaft (1) and end be provided with successively oil sealing restraining groove (25), back-up ring axial trough (26), magnetic liquid chamber (27), the shaft shoulder (28), locking screw (29) and etc. split axle joint-cutting (30); Oil sealing restraining groove (25) is located at the left part of transmission input shaft (1), back-up ring axial trough (26) is located at the right side of oil sealing restraining groove (25), magnetic liquid chamber (27) is located at the right side of back-up ring axial trough (26), the shaft shoulder (28) is located at the right side of magnetic liquid chamber (27), locking screw (29) is located at the stage casing right part of transmission input shaft (1), waits split axle joint-cutting (30) to be positioned at the right part of transmission input shaft (1).
3. vacuum environment underdrive according to claim 1 is inputted shaft seal, it is characterized in that, described frame (8), four-way connect piece (18), titting water outlet (19), fill hose joint (20), slow water block (21) and water channel outer hoop sheet (22) and form water cooling system; Before to frame (8) fine finishing, the weldment of water cooling system will be integrally welded, titting water outlet (19) and fill hose joint (20) are contained in four-way to be connect on the piece (18), external cylindrical surface in the middle and upper part of frame (8) is provided with tank, in tank, be welded with four-way and connect piece (18) and three slow water blocks (21), they are 90 ° and evenly distribute, and are welded with water channel outer hoop sheet (22) at the lateral port of the groove of frame (8).
4. using method of each described vacuum environment underdrive input shaft seal according to claim 1-3, it is characterized in that the upper-end surface of sealing device is docked with vacuum-sealed cavity (24) fixing, magnetic liquid (3), magnetic pole (4) and magnetic patch (5) form magnetic field on every side at transmission input shaft (1), and be on the shaft section at magnetic liquid (3) and magnetic pole (4) place, the magnetic line of force has formed sealing surface in this cross section, stop the circulation of transmission input shaft (1) ambient air, play seal action; The sealing device is provided with two pairs of magnetic liquids (3) and magnetic pole (4), and secondary seal is implemented in the magnetic field that makes it to produce, and no matter whether transmission input shaft (1) rotates, or how high rotating speed is, and seal action all can exist always, is not affected; When the sealing device is used in the thermal field, open water inlet switch, make cooling water enter cooling system from fill hose joint (20), in the body of frame (8), be centered around two-stage magnetic pole (4) and magnetic patch (5) around, flow out from titting water outlet (19) through three grades of slow water blocks (21), this water-cooling circulating system has played the effect that cools to major part magnetic pole (4), magnetic patch (5) and the frame (8) of this device.
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| CN2012104432147A CN102927283A (en) | 2012-11-08 | 2012-11-08 | Sealing device for transmission input shafts in vacuum environment and using method of sealing device |
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| CN2012104432147A CN102927283A (en) | 2012-11-08 | 2012-11-08 | Sealing device for transmission input shafts in vacuum environment and using method of sealing device |
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| CN103192384A (en) * | 2013-03-11 | 2013-07-10 | 上海交通大学 | Static vacuum shafting device of integrated rotary transformer |
| CN103438222A (en) * | 2013-09-25 | 2013-12-11 | 北京交通大学 | Method for improving seal pressure endurance capability of magnetic liquid by adding micron non-magnetic solid particles |
| CN104154237A (en) * | 2014-07-18 | 2014-11-19 | 安徽荃富信息科技有限公司 | Vacuum sealing mechanism of rotary shaft |
| CN104362795A (en) * | 2014-11-28 | 2015-02-18 | 国茂减速机集团有限公司 | Direct connection type motor |
| CN105221752A (en) * | 2015-08-03 | 2016-01-06 | 张海娟 | The rotating shaft tubular type piecing devices of magnet fluid sealing |
| CN107076309A (en) * | 2014-10-24 | 2017-08-18 | 公益财团法人铁道综合技术研究所 | Magnetic fluid seal structure is used in rotation at a high speed |
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| CN103192384A (en) * | 2013-03-11 | 2013-07-10 | 上海交通大学 | Static vacuum shafting device of integrated rotary transformer |
| CN103438222A (en) * | 2013-09-25 | 2013-12-11 | 北京交通大学 | Method for improving seal pressure endurance capability of magnetic liquid by adding micron non-magnetic solid particles |
| CN104154237A (en) * | 2014-07-18 | 2014-11-19 | 安徽荃富信息科技有限公司 | Vacuum sealing mechanism of rotary shaft |
| CN107076309B (en) * | 2014-10-24 | 2019-01-18 | 公益财团法人铁道综合技术研究所 | High speed rotation magnetic fluid seal structure |
| CN107076309A (en) * | 2014-10-24 | 2017-08-18 | 公益财团法人铁道综合技术研究所 | Magnetic fluid seal structure is used in rotation at a high speed |
| US10113591B2 (en) | 2014-10-24 | 2018-10-30 | Railway Technical Research Institute | Magnetic fluid sealing structure for high-speed rotation |
| CN104362795A (en) * | 2014-11-28 | 2015-02-18 | 国茂减速机集团有限公司 | Direct connection type motor |
| CN105221752A (en) * | 2015-08-03 | 2016-01-06 | 张海娟 | The rotating shaft tubular type piecing devices of magnet fluid sealing |
| CN107246477A (en) * | 2017-05-15 | 2017-10-13 | 杭州慧翔电液技术开发有限公司 | A kind of installation method of magnetic fluid rotary sealing appts |
| PL238823B1 (en) * | 2018-08-27 | 2021-10-11 | Akademia Gorniczo Hutnicza Im Stanislawa Staszica W Krakowie | Rotating shaft bushing with multi-stage ferromagnetic seals |
| CN109357019A (en) * | 2018-11-13 | 2019-02-19 | 中山瑞科新能源有限公司 | A kind of vacuum equipment with live-roller and magnetic fluid seal driving device |
| CN109357019B (en) * | 2018-11-13 | 2023-09-08 | 中山瑞科新能源有限公司 | Vacuum equipment with driving roller and magnetic fluid sealing driving device |
| CN110270289A (en) * | 2019-07-02 | 2019-09-24 | 中国科学院过程工程研究所 | A kind of superelevation sealing polycarbonate reaction unit |
| CN112253726A (en) * | 2020-10-19 | 2021-01-22 | 江苏南极机械有限责任公司 | Main shaft package for secondary filter screen |
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Application publication date: 20130213 |