CN102954194A - Railway vehicle traveling gearbox sealing structure - Google Patents
Railway vehicle traveling gearbox sealing structure Download PDFInfo
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- CN102954194A CN102954194A CN2011102524648A CN201110252464A CN102954194A CN 102954194 A CN102954194 A CN 102954194A CN 2011102524648 A CN2011102524648 A CN 2011102524648A CN 201110252464 A CN201110252464 A CN 201110252464A CN 102954194 A CN102954194 A CN 102954194A
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- bearing support
- flange
- seal
- sealing
- seal ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 121
- 210000004907 gland Anatomy 0.000 claims description 15
- 238000000151 deposition Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 abstract description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 8
- 230000000694 effects Effects 0.000 description 7
- 239000004519 grease Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a railway vehicle traveling gearbox sealing structure which comprises an end cover, a framework oil seal, a bearing pedestal, a sealing ring and a sealing sleeve, wherein a first sealing flange of the bearing pedestal is corresponding to a first flange of the sealing ring to form a first circumferential sealing gap; a second sealing flange of the bearing pedestal is corresponding to a second flange of the sealing ring to form a second circumferential sealing gap; a third sealing flange of the bearing pedestal is corresponding to a third flange of the sealing ring to form a third circumferential sealing gap; a fifth sealing flange of the bearing pedestal extends into a second maze sealing groove of the sealing ring; a fourth flange of the sealing ring extends into a first maze sealing groove of the bearing pedestal to form maze sealing; first, second and third sealing cavities are formed between the bearing pedestal and the sealing ring; oil return holes are arranged on the bearing pedestal and located at the bottoms of the sealing cavities; the framework oil seal is arranged between the end cover and the sealing sleeve; and contact type sealing is formed between the framework oil seal and the sealing sleeve. The railway vehicle traveling gearbox sealing structure is reliable in bidirectional sealing and simple in structure.
Description
Technical field
The rotation that the present invention relates to a kind of gear-box that adopts oil lubrication connects the sealing configuration at position, and the axletree rotation that is particularly useful for middle and high fast rail vehicle uni-drive gear box connects the sealing at position.
Background technique
At present, the traveling gearbox of railway vehicle of China adopts oil lubrication mostly.If oil leak in use appears in the walking gear case, not only affect the working life of the strength members such as inner gear of the gear box, bearing, and can cause track environmental pollution along the line, even have influence on the adhesive performance of travelled by vehicle section.Simultaneously, gear-box in use, in a single day extraneous sleet dust and other impurities enters in the gear-box, will be on the working life of bearing, gear etc. and the performance generation impact in various degree of lubricant oil, therefore when the sealing system of design gear case, require to guarantee that not only the lubricant oil in the gear-box can not outwards leak out, also necessarily require simultaneously outer foreign material of gear-box etc. can not enter box house, namely require the sealing configuration of gear-box can realize dual face seals.
In China Patent Publication No. be: CN102009663A, name is called in the patent documentation of " gear case sealing structure of urban rail vehicle ", has introduced a kind of Bidirectional seal structure for urban rail vehicle gearbox.In this technological scheme, only be provided with the circumferential seal gap one, therefore be only applicable to the not high occasions of motion speed such as city rail, subway.Along with the raising of walking gear case motion speed, the gear-box internal pressure also raises relatively, and the reliability of its sealing just can not satisfy the usage requirement of walking gear case.
Along with China's rail vehicle motion speed constantly develops to middle and high speed, also more and more higher to its reliability requirement, wherein then require two way sealed reliable to walking gear case sealing system, compact structure is fit to the high speed operation requirement, is convenient to maintaining.
Summary of the invention
The object of the present invention is to provide a kind of two way sealed reliable, simple in structure and can satisfy the sealing structure for traveling gearbox of railway vehicle of high speed traveling requirement.
The technological scheme that realizes above-mentioned purpose is: a kind of sealing structure for traveling gearbox of railway vehicle, comprise the bearing support that is fixed on the casing and the seal ring that is fixed on the axletree, described bearing support has the matching hole of installation shaft bearing outer-ring, also has bearing support the first sealing flange, bearing support the 4th sealing flange and bearing support the 5th sealing flange, form the first labyrinth seal groove between bearing support the 4th sealing flange and bearing support the 5th sealing flange, described seal ring has seal ring the first flange, seal ring the 3rd flange and seal ring the 4th flange, form the second labyrinth seal groove between seal ring the 4th flange and the seal ring ring body, bearing support first sealing flange of described bearing support is corresponding with seal ring first flange of seal ring and form the first circumferential seal gap, bearing support the 5th sealing flange of described bearing support is stretched in the second labyrinth seal groove of seal ring, seal ring the 4th flange of described seal ring is stretched in the first labyrinth seal groove of bearing support and is formed labyrinth seal simultaneously, described bearing support the 4th sealing flange and seal ring the 4th flange are oblique flange, tiltedly form labyrinth seal taper annular groove between the flange, form the first annular seal space between described bearing support and the seal ring, the first annular seal space bottom is provided with the spill port that communicates with box house, described bearing support also has bearing support the second sealing flange, bearing support the 3rd sealing flange, described seal ring also has seal ring the second flange, bearing support second sealing flange of described bearing support is corresponding with seal ring second flange of seal ring and form second week to seal clearance, bearing support the 3rd sealing flange of described bearing support is corresponding with seal ring the 3rd flange of seal ring and form the 3rd circumferential seal gap, bearing support second sealing flange of described bearing support, seal ring second flange of bearing support the 3rd sealing flange and seal ring, surround the second annular seal space between seal ring the 3rd flange, described bearing support the 4th sealing flange top has radial protrusion, form oil trap between radial protrusion and bearing support the 4th sealing flange outer side wall, described bearing support the 3rd sealing flange top has axial projection, bearing support the 3rd sealing flange of described bearing support, bearing support the 4th sealing flange, surround the 3rd annular seal space between seal ring the 3rd flange of bearing support end wall and seal ring, described the second annular seal space, the 3rd annular seal space bottom all communicates with spill port, the outside of described bearing support is fixed with end cap, stuffing box gland is equipped with in the corresponding position that is positioned at end cap on the described axletree also fixed cover, be provided with outside framework oil seal between end cap and the stuffing box gland, outside framework oil seal and stuffing box gland form contact seal.
Described the first circumferential seal gap, second week successively decrease successively to the diameter in seal clearance and the 3rd circumferential seal gap, form the stepped shaft sealing configuration.
Have some circumferential decompressing grooves on the corresponding side face of bearing support first sealing flange of described bearing support and seal ring first flange of seal ring.
Have on the described end cap radially oil hole and the hole wall of the center hole of end cap on have the circumferential fat groove of depositing.
The maximum outside diameter of described seal ring is less than the minimum diameter of the bearing outer ring in the matching hole that is installed in bearing support.
After adopting said structure, because bearing support the 4th sealing flange top has radial protrusion, form oil trap between radial protrusion and bearing support the 4th sealing flange outer side wall, therefore can prevent effectively that oil from directly entering in the labyrinth seal, but flow in the 3rd annular seal space; Because bearing support the 3rd sealing flange top has axial projection, therefore can oil be accommodated in the 3rd annular seal space better; Because described bearing support the 4th sealing flange and seal ring the 4th flange are oblique flange, tiltedly form labyrinth seal taper annular groove between the flange, utilize conical surface pump oil principle, make oil be difficult to enter in the labyrinth seal groove, increased the effect of labyrinth seal; Because the fluid decompression step by step that the first annular seal space, the second annular seal space and the 3rd annular seal space that form between bearing support and the seal ring overflow inside, fluid is flowed at the bottom of the chamber along the chamber wall, flow back to box house by spill port, by the decompression of three road annular seal spaces from inside to outside, mist of oil pressure reduces gradually, increase the difficulty that mist of oil leaks, improved sealing effect; Because stuffing box gland is equipped with in the relevant position of axletree also fixed cover, be provided with outside framework oil seal between end cap and the stuffing box gland, outside framework oil seal and stuffing box gland form contact seal, therefore, can prevent the intrusion box houses such as outside rainwater, dust, by adopting above-mentioned sealing configuration, realized that gear-box rotates the dual face seals of breakthrough part position under middle and high fast operating mode, sealing effect is reliable; Owing to successively decrease successively to the diameter in seal clearance and the 3rd circumferential seal gap in the first circumferential seal gap, second week, the stepped shaft sealing configuration of formation has increased the mist of oil required pressure that leaks gradually; Owing to having some circumferential decompressing grooves on the corresponding end-faces of bearing support first sealing flange of described bearing support and seal ring first flange of seal ring, therefore can increase the draining resistance in the first circumferential seal gap, strengthen the sealing effect in the first circumferential seal gap; Owing to having oil hole and depositing the fat groove on the described end cap, communicate with the outside framework oil seal mounting groove, regularly by the oil hole grease up, between outside framework oil seal and stuffing box gland, form grease lubrication, reduce friction loss, prevent that simultaneously foreign matter from entering in the mounting groove; Because the maximum outside diameter of described seal ring is less than the minimum diameter of the bearing outer ring in the matching hole that is installed in bearing support, so sealing configuration is easy for installation.The present invention can make extreme pressure lubricant that vehicle produces under the high speed operating mode through the shutoff of circumferential seal gap, three roads, labyrinth seal and outside framework oil seal, forms multiple-sealed guarantee, and sealing effect is reliable.In addition, this present invention also has the characteristics of simple in structure, low wearing and tearing, easy care.
Description of drawings
Fig. 1 is the structural representation of sealing structure for traveling gearbox of railway vehicle of the present invention;
Fig. 2 is the I section enlarged view among Fig. 1.
Embodiment
The present invention is further detailed explanation below in conjunction with embodiment that accompanying drawing provides.
Such as Fig. 1, shown in 2, a kind of sealing structure for traveling gearbox of railway vehicle, comprise the bearing support 1 that is fixed on the casing 15 and the seal ring 4 that is fixed on the axletree 16, described bearing support 1 has the matching hole of installation shaft bearing outer-ring, also has bearing support the first sealing flange 1-1, bearing support the 4th sealing flange 1-4 and bearing support the 5th sealing flange 1-5, form the first labyrinth seal groove 6 between bearing support the 4th sealing flange 1-4 and bearing support the 5th sealing flange 1-5, described seal ring 4 has seal ring the first flange 4-1, seal ring the 3rd flange 4-3 and seal ring the 4th flange 4-4, form the second labyrinth seal groove 7 between seal ring the 4th flange 4-4 and seal ring 4 ring bodies, the bearing support first sealing flange 1-1 of described bearing support 1 is corresponding with the seal ring first flange 4-1 of seal ring 4 and form the first circumferential seal gap 8-1, bearing support the 5th sealing flange 1-5 of described bearing support 1 stretches in the second labyrinth seal groove 7 of seal ring 4, seal ring the 4th flange 4-4 of described seal ring 4 stretches in the first labyrinth seal groove 6 of bearing support 1 and forms labyrinth seal simultaneously, described bearing support the 4th sealing flange 1-4 and seal ring the 4th flange 4-4 are oblique flange, tiltedly form labyrinth seal taper annular groove 18 between the flange, form the first annular seal space 9 between described bearing support 1 and the seal ring 4, the first annular seal space 9 bottoms are provided with the spill port 12 that communicates with casing 15 inside, described bearing support 1 also has bearing support the second sealing flange 1-2, bearing support the 3rd sealing flange 1-3, described seal ring 4 also has seal ring the second flange 4-2, the bearing support second sealing flange 1-2 of described bearing support 1 is corresponding with the seal ring second flange 4-2 of seal ring 4 and form second week to seal clearance 8-2, bearing support the 3rd sealing flange 1-3 of described bearing support 1 is corresponding with seal ring the 3rd flange 4-3 of seal ring 4 and form the 3rd circumferential seal gap 8-3, the bearing support second sealing flange 1-2 of described bearing support 1, the seal ring second flange 4-2 of bearing support the 3rd sealing flange 1-3 and seal ring 4, surround the second annular seal space 10 between seal ring the 3rd flange 4-3, described bearing support the 4th sealing flange 1-4 top has radial protrusion 19, form oil trap 20 between radial protrusion 19 and bearing support the 4th sealing flange 1-4 outer side wall, described bearing support the 3rd sealing flange 1-3 top has axial projection 21, bearing support the 3rd sealing flange 1-3 of described bearing support 1, bearing support the 4th sealing flange 1-4, surround the 3rd annular seal space 11 between seal ring the 3rd flange 4-3 of bearing support end wall 1-6 and seal ring 4, described the second annular seal space 10, the 3rd annular seal space 11 bottoms all communicate with spill port 12, the outside of described bearing support 1 is fixed with end cap 2, stuffing box gland 5 is equipped with in the corresponding position that is positioned at end cap 2 on the described axletree 16 also fixed cover, be provided with outside framework oil seal 3 between end cap 2 and the stuffing box gland 5, outside framework oil seal 3 forms contact seal with stuffing box gland 5.
As shown in Figure 2, for the stepped shaft sealing configuration that forms, further enhanced leaktightness effect, described the first circumferential seal gap 8-1, second week successively decrease successively to the diameter of seal clearance 8-2 and the 3rd circumferential seal gap 8-3, form the stepped shaft sealing configuration.
As shown in Figure 2, in order to increase the draining resistance of the first circumferential seal gap location, strengthen the sealing effect in the first circumferential seal gap, have some circumferential decompressing grooves 13 on the corresponding side face of the bearing support first sealing flange 1-1 of described bearing support 1 and the seal ring first flange 4-1 of seal ring 4.
As shown in Figure 1, 2, for the ease of annotating lubricating grease, have on the described end cap 2 radially oil hole 14 and the hole wall of the center hole of end cap 2 on have the circumferential fat groove 22 of depositing.Can regularly pass through oil hole 14 grease ups, between outside framework oil seal 3 and stuffing box gland 5, form grease lubrication, reduce friction loss.
As shown in Figure 1, for the ease of assembling, the maximum outside diameter of described seal ring 4 is less than the minimum diameter of bearing 17 outer rings in the matching hole that is installed in bearing support 1.
As shown in Figure 1, stuffing box gland 5 has the material of certain degree of hardness and wear resistance to make, and smooth surface.
Claims (5)
1. sealing structure for traveling gearbox of railway vehicle, comprise the bearing support (1) that is fixed on the casing (15) and be fixed on seal ring (4) on the axletree (16), described bearing support (1) has the matching hole of installation shaft bearing outer-ring, also has bearing support the first sealing flange (1-1), bearing support the 4th sealing flange (1-4) and bearing support the 5th sealing flange (1-5), form the first labyrinth seal groove (6) between bearing support the 4th sealing flange (1-4) and bearing support the 5th sealing flange (1-5), described seal ring (4) has seal ring the first flange (4-1), seal ring the 3rd flange (4-3) and seal ring the 4th flange (4-4), form the second labyrinth seal groove (7) between seal ring the 4th flange (4-4) and seal ring (4) ring body, bearing support first sealing flange (1-1) of described bearing support (1) is corresponding with seal ring first flange (4-1) of seal ring (4) and form the first circumferential seal gap (8-1), bearing support the 5th sealing flange (1-5) of described bearing support (1) is stretched in the second labyrinth seal groove (7) of seal ring (4), seal ring the 4th flange (4-4) of described seal ring (4) is stretched and form labyrinth seal in the first labyrinth seal groove (6) of bearing support (1) simultaneously, described bearing support the 4th sealing flange (1-4) is oblique flange with seal ring the 4th flange (4-4), tiltedly form labyrinth seal taper annular groove (18) between the flange, form the first annular seal space (9) between described bearing support (1) and the seal ring (4), the first annular seal space (9) bottom is provided with the spill port (12) that communicates with casing (15) inside, it is characterized in that:
A, described bearing support (1) also have bearing support the second sealing flange (1-2), bearing support the 3rd sealing flange (1-3),
B, described seal ring (4) also have seal ring the second flange (4-2),
Bearing support second sealing flange (1-2) of d, described bearing support (1) is corresponding with seal ring second flange (4-2) of seal ring (4) and form second week to seal clearance (8-2),
Bearing support the 3rd sealing flange (1-3) of e, described bearing support (1) is corresponding with seal ring the 3rd flange (4-3) of seal ring (4) and form the 3rd circumferential seal gap (8-3),
Surround the second annular seal space (10) between seal ring second flange (4-2) of bearing support second sealing flange (1-2) of f, described bearing support (1), bearing support the 3rd sealing flange (1-3) and seal ring (4), seal ring the 3rd flange (4-3)
G, described bearing support the 4th sealing flange (1-4) top have radial protrusion (19), form oil trap (20) between radial protrusion (19) and bearing support the 4th sealing flange (1-4) outer side wall, described bearing support the 3rd sealing flange (1-3) top has axial projection (21)
Surround the 3rd annular seal space (11) between seal ring the 3rd flange (4-3) of bearing support the 3rd sealing flange (1-3) of h, described bearing support (1), bearing support the 4th sealing flange (1-4), bearing support end wall (1-6) and seal ring (4),
I, described the second annular seal space (10), the 3rd annular seal space (11) bottom all communicates with spill port (12),
The outside of j, described bearing support (1) is fixed with end cap (2), stuffing box gland (5) is equipped with in the corresponding position that is positioned at end cap (2) on the described axletree (16) also fixed cover, be provided with outside framework oil seal (3) between end cap (2) and the stuffing box gland (5), outside framework oil seal (3) forms contact seal with stuffing box gland (5).
2. sealing structure for traveling gearbox of railway vehicle according to claim 1, it is characterized in that: described the first circumferential seal gap (8-1), second week successively decrease successively to the diameter in seal clearance (8-2) and the 3rd circumferential seal gap (8-3), form the stepped shaft sealing configuration.
3. sealing structure for traveling gearbox of railway vehicle according to claim 1 is characterized in that: have some circumferential decompressing grooves (13) on the corresponding side face of bearing support first sealing flange (1-1) of described bearing support (1) and seal ring first flange (4-1) of seal ring (4).
4. sealing structure for traveling gearbox of railway vehicle according to claim 1 is characterized in that: have on the described end cap (2) radially oil hole (14) and the hole wall of the center hole of end cap (2) on have the circumferential fat groove (22) of depositing.
5. sealing structure for traveling gearbox of railway vehicle according to claim 1 is characterized in that: the maximum outside diameter of described seal ring (4) is less than the minimum diameter of bearing (17) outer ring in the matching hole that is installed in bearing support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252464.8A CN102954194B (en) | 2011-08-30 | 2011-08-30 | Railway vehicle traveling gearbox sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252464.8A CN102954194B (en) | 2011-08-30 | 2011-08-30 | Railway vehicle traveling gearbox sealing structure |
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| Publication Number | Publication Date |
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| CN102954194A true CN102954194A (en) | 2013-03-06 |
| CN102954194B CN102954194B (en) | 2015-04-22 |
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| CN201110252464.8A Active CN102954194B (en) | 2011-08-30 | 2011-08-30 | Railway vehicle traveling gearbox sealing structure |
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| CN103438196A (en) * | 2013-09-11 | 2013-12-11 | 株洲高精传动技术有限公司 | Non-contact seal assembly for gear box |
| CN104074955A (en) * | 2013-03-29 | 2014-10-01 | 常州市瑞泰工程机械有限公司 | Self-backflow type sealing structure of railway vehicle gear box |
| CN106051163A (en) * | 2016-07-28 | 2016-10-26 | 郑州机械研究所 | High-speed train gearbox shaft sealing structure |
| CN106555868A (en) * | 2017-01-19 | 2017-04-05 | 郑州机械研究所 | MPV (Multi-Purpose Vehicle) axle gear box sealing structure |
| GB2545574A (en) * | 2015-12-17 | 2017-06-21 | Romax Tech Ltd | Seal |
| CN107023651A (en) * | 2017-06-13 | 2017-08-08 | 中车株洲电力机车有限公司 | A kind of gear-box dynamic sealing and oil-returning structure |
| CN107165945A (en) * | 2017-07-24 | 2017-09-15 | 江苏新瑞齿轮系统有限公司 | A kind of gear-box and bearing sealing device |
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Cited By (22)
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| CN104074955A (en) * | 2013-03-29 | 2014-10-01 | 常州市瑞泰工程机械有限公司 | Self-backflow type sealing structure of railway vehicle gear box |
| CN104074955B (en) * | 2013-03-29 | 2016-08-03 | 常州市瑞泰工程机械有限公司 | Railway vehicle gear case seals structure from reverse-flow type |
| CN103438196B (en) * | 2013-09-11 | 2016-03-02 | 湖南南方宇航高精传动有限公司 | Gear-box noncontact seal assembly |
| CN103438196A (en) * | 2013-09-11 | 2013-12-11 | 株洲高精传动技术有限公司 | Non-contact seal assembly for gear box |
| GB2545574A (en) * | 2015-12-17 | 2017-06-21 | Romax Tech Ltd | Seal |
| GB2545574B (en) * | 2015-12-17 | 2018-10-17 | Romax Tech Limited | A Gearbox Seal for a Gearbox of a High Speed Train with a Pressure Differential |
| TWI729142B (en) * | 2016-06-08 | 2021-06-01 | 日商納博特斯克股份有限公司 | Gear device |
| CN106051163A (en) * | 2016-07-28 | 2016-10-26 | 郑州机械研究所 | High-speed train gearbox shaft sealing structure |
| CN106555868A (en) * | 2017-01-19 | 2017-04-05 | 郑州机械研究所 | MPV (Multi-Purpose Vehicle) axle gear box sealing structure |
| CN107023651A (en) * | 2017-06-13 | 2017-08-08 | 中车株洲电力机车有限公司 | A kind of gear-box dynamic sealing and oil-returning structure |
| CN107165945A (en) * | 2017-07-24 | 2017-09-15 | 江苏新瑞齿轮系统有限公司 | A kind of gear-box and bearing sealing device |
| CN108127687A (en) * | 2018-01-29 | 2018-06-08 | 埃夫特智能装备股份有限公司 | A kind of industrial machine human wrist |
| CN108343746A (en) * | 2018-04-27 | 2018-07-31 | 国电联合动力技术有限公司 | A kind of associated sealing arrangement for bearings |
| CN108980362A (en) * | 2018-07-25 | 2018-12-11 | 湖南南方宇航高精传动有限公司 | Labyrinth seal inner ring and preparation method thereof and big profile shaft low speed movable sealing structure |
| CN109114201A (en) * | 2018-10-22 | 2019-01-01 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of labyrinth seal structure and gear box structure |
| CN109114201B (en) * | 2018-10-22 | 2024-05-07 | 中车戚墅堰机车车辆工艺研究所股份有限公司 | Labyrinth seal structure and gear box structure |
| CN109519544A (en) * | 2018-12-19 | 2019-03-26 | 常熟长城轴承有限公司 | A kind of electric main shaft sealing construction |
| CN112483566A (en) * | 2020-12-29 | 2021-03-12 | 江苏德立密封科技有限公司 | Multistage magnetic rubber sealing device for automobile braking system |
| CN112576656A (en) * | 2020-12-29 | 2021-03-30 | 江苏德立密封科技有限公司 | Precise rubber sealing device for automobile disc brake |
| CN115041082A (en) * | 2022-06-10 | 2022-09-13 | 中南大学 | Shaft end sealing device of powder mixing equipment and mounting method thereof |
| CN116816908A (en) * | 2022-12-16 | 2023-09-29 | 天津华建天恒传动有限责任公司 | Sealing structure of wind power generation gear box |
| CN116816908B (en) * | 2022-12-16 | 2024-05-07 | 天津华建天恒传动有限责任公司 | Sealing structure of wind power generation gear box |
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