CN201901158U - Urban rail vehicle gearbox sealing structure - Google Patents
Urban rail vehicle gearbox sealing structure Download PDFInfo
- Publication number
- CN201901158U CN201901158U CN 201020669122 CN201020669122U CN201901158U CN 201901158 U CN201901158 U CN 201901158U CN 201020669122 CN201020669122 CN 201020669122 CN 201020669122 U CN201020669122 U CN 201020669122U CN 201901158 U CN201901158 U CN 201901158U
- Authority
- CN
- China
- Prior art keywords
- flange
- bearing seat
- seal ring
- gear case
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/042—Housings for rolling element bearings for rotary movement
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- Sealing Of Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses an urban rail vehicle gearbox sealing structure comprising a bearing seat which is fixed on a box body and a seal ring which is fixed on a rotary shaft; the bearing seat is provided with a matching hole for installing the outer ring of a bearing; a bearing seat first sealing flange, a bearing seat second sealing flange, a bearing seat third sealing flange and a bearing seat fourth sealing flange are also arranged; the seal ring is provided with a seal ring first flange and a seal ring second flange, a seal ring third flange, an oil throwing flange and a second sealing groove; the bearing seat and the seal ring form first radial spacing sealing, second radial spacing sealing and labyrinth sealing; a first circular seal chamber and a second circular seal chamber are formed between the bearing seat and the seal ring; and the bottom of the first circular seal chamber is provided with an oil return hole, and the bottom of the second circular seal chamber is provided with a through hole. The urban rail vehicle gearbox sealing structure has a simple structure and seals reliably, and the installation, detachment and maintenance are convenient.
Description
Technical field
The utility model relates to a kind of hermetically-sealed construction that adopts the gear case rotation perforation position of oil lubrication, and the axletree rotation that is particularly useful for the guideway vehicle drive gearbox connects the sealing at position, belongs to the track traffic mechanical field.
Background technology
At present, because on reliability, maintainability and the financial cost of gear case, the city rail vehicle drive gearbox of China all adopts oil lubrication.Some railcar drive gearboxs in use, the oil leakage phenomenon of its dynamic seal position various degrees, and seal structure complex, axial dimension is bigger; The leakage of lubricating oil not only has influence on the service life of inner gear of the gear box and bearing but also can cause track environmental pollution along the line, even has influence on the adhesive performance of travelled by vehicle portion.
Along with the urban rail transit in China fast development, the technical requirements of railway transportation equipment is more and more higher, then requires lubricating oil not have leakage to the sealing of gear case.Simultaneously, because gear case is installed on the bogie truck of city rail vehicle bottom, when vehicle operating, in a single day the sleet dust and other impurities enters in the gear case, will be to the service life of parts such as bearing, gear and the performance generation influence in various degree of lubricating oil, therefore when the sealing system of design gear case, to guarantee that not only the lubricating oil in the gear case can not outwards let out, cleaning liquid when outer foreign material of gear case and vehicle are cleaned etc. can not enter box house, promptly requires the hermetically-sealed construction of gear case can realize dual face seals.
The maintenance of city rail vehicle gear case is had relatively high expectations, usually requiring its overhaul period is 10 ~ 12 years or 1,200,000 ~ 1,500,000 kilometers, and present contact-type seal structure such as outside framework oil seal etc. obviously can not satisfy the requirement in service life of gear case leak free, and because material has wearing and tearing, this is to being installed in the gear case maintenance on the bogie truck and changing very inconvenient, therefore, the sealing at gear case rotation perforation position need be adopted no worn-down non-contacting seal structure.
In addition, owing to the restriction of train bogie truck space structure size and require gear case miniaturization, lightweight for alleviating unsprung weight, the gear case axial dimension also can be restricted, therefore the sealing that requires the gear case rotation to connect the position removes and requires the sealing can be outer, also must have less axial dimension, to satisfy the requirements of installation space of gear case.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, sealing is reliable, the city rail vehicle gear case hermetically-sealed construction that can realize the gear case dual face seals.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of city rail vehicle gear case hermetically-sealed construction, comprise bearing seat that is fixed on the casing and the seal ring that is fixed on the S. A., described bearing seat has the mating holes of bearings mounted outer ring, also have bearing seat first sealing flange, bearing seat second sealing flange, bearing seat the 3rd sealing flange and bearing seat the 4th sealing flange, form first seal groove between bearing seat first sealing flange and bearing seat second sealing flange; Have seal ring first flange and seal ring second flange, seal ring the 3rd flange on the described seal ring, get rid of the oily flange and second seal groove; Described bearing seat the 3rd sealing flange is corresponding with seal ring second flange and form first radial clearance seals; Described bearing seat the 4th sealing flange is corresponding with seal ring the 3rd flange and form second radial clearance seals; Described bearing seat second sealing flange is stretched in second seal groove of seal ring, and described seal ring first flange is stretched in first seal groove of bearing seat and formed labyrinth packing simultaneously; Also form first annular seal space and second annular seal space between described bearing seat and the seal ring, first annular seal space is between first radial clearance seals and labyrinth packing, and second annular seal space is between the labyrinth packing and second radial clearance seals; The oily flange that gets rid of of described seal ring is stretched in first annular seal space; On the described bearing seat and the bottom that is positioned at first annular seal space is provided with the fuel return hole that communicates with gear case inside, and on the described bearing seat and the bottom that is positioned at second annular seal space is provided with the through hole with the gear case exterior.
Described bearing seat first sealing flange is oblique flange, forms annular catcher groove between this oblique flange and the first ring seal cavity wall.
The oily flange that gets rid of of described seal ring is a radial flange.
One side of the outer portion of getting rid of oily flange of described seal ring has circular conical surface.
Described bearing seat outer end has radial flange, forms annular intercepting basin between radial flange and the bearing seat outer wall.
Getting rid of between oily flange and seal ring second flange on the described seal ring is provided with circular groove, and the circular groove bottom is provided with sharp flange, and sharp flange tip is towards first annular seal space.
The maximum outside diameter of described seal ring is less than the minimum diameter that is installed in the outer ring of the bearing in the mating holes on the bearing seat.
After adopting said structure, because first, contactless movable sealing structures such as second radial clearance seals and labyrinth packing only are made of bearing seat and seal ring, and bearing seat adopts the one-piece construction with installation shaft bearing outer-ring and sealing function, therefore, simple in structure, not only reduced the number of parts of gear case rotation perforation position movable sealing structure, make because of the fitting surface place when having avoided a plurality of component assembly and reason such as assembling causes oil leakage may, also effectively reduce simultaneously the axial dimension of gear case rotation perforation position movable sealing structure, satisfied the requirements of installation space of gear case; Owing to form first, second annular seal space between bearing seat and the seal ring, first annular seal space and second annular seal space connect by radial clearance seals and the labyrinth seal structure that forms between bearing seat and the seal ring again, and therefore sealing is reliable; By adopting above-mentioned hermetically-sealed construction, thereby realized that the gear case rotation connects the dual face seals at position.The utility model compared with prior art also has and does not have wearing and tearing, dismounting characteristics easy to maintenance.From test and practical application effect, its sealing is reliable, has satisfied the seal request of gear case, is particularly useful for the sealing that the rotation of city rail vehicle drive gearbox axletree connects the position.
Description of drawings
The embodiment that provides below in conjunction with accompanying drawing is described in further detail the utility model.
Fig. 1 is the section-drawing of city rail vehicle gear case hermetically-sealed construction of the present utility model;
Fig. 2 is the Ι partial enlarged drawing of Fig. 1.
The specific embodiment
As shown in Figure 1, 2, city rail vehicle gear case hermetically-sealed construction of the present utility model, comprise bearing seat 6 that is fixed on the casing 9 and the seal ring 3 that is fixed on the S. A. 1, described bearing seat 6 has the mating holes 6-7 of the outer ring that bearing 2 is installed, also have the bearing seat first sealing flange 6-5, the bearing seat second sealing flange 6-9, bearing seat the 3rd sealing flange 6-8 and bearing seat the 4th sealing flange 6-10, form the first seal groove 6-11 between bearing seat first sealing flange 6-5 and the bearing seat second sealing flange 6-9; Have seal ring first flange 3-4 and the seal ring second flange 3-2, seal ring the 3rd flange 3-6 on the described seal ring 3, get rid of the oily flange 3-1 and the second seal groove 3-5; Described bearing seat the 3rd sealing flange 6-8 is corresponding with the seal ring second flange 3-2 and form first radial clearance seals 8; Described bearing seat the 4th sealing flange 6-10 is corresponding with seal ring the 3rd flange 3-6 and form second radial clearance seals 4; The described bearing seat second sealing flange 6-9 stretches in the second seal groove 3-5 of seal ring 3, and the described seal ring first flange 3-4 stretches in the first seal groove 6-11 of bearing seat 6 and forms labyrinth packing simultaneously; Also form first annular seal space 7 and second annular seal space 5 between described bearing seat 6 and the seal ring 3, first annular seal space 7 is between first radial clearance seals 8 and labyrinth packing, and second annular seal space 5 is between the labyrinth packing and second radial clearance seals 4; The oily flange 3-1 that gets rid of of described seal ring 3 stretches in first annular seal space 7; On the described the bearing seat 6 and bottom that is positioned at first annular seal space 7 is provided with the fuel return hole 6-6 that communicates with gear case inside, and on the described the bearing seat 6 and bottom that is positioned at second annular seal space 5 is provided with the through hole 6-1 with the gear case exterior.
As shown in Figure 1, 2, the described bearing seat first sealing flange 6-5 is oblique flange, forms annular catcher groove 6-4 between this oblique flange and first annular seal space, 7 inwalls.Thereby make parts of lubricating oil on first annular seal space, 7 inwalls be back to the bottom of first annular seal space 7 along annular catcher groove 6-4, prevent that effectively lubricating oil from directly entering in the labyrinth clearance that connects the position between first annular seal space 7 and second annular seal space 5, thus the possibility of avoiding lubricating oil to continue to leak from the labyrinth clearance position that forms between bearing seat 6 and the seal ring 3.
As shown in Figure 1, 2, get rid of the functional oil that gets rid of of oily flange 3-1 for enhancing, the oily flange 3-1 that gets rid of of described seal ring 3 is a radial flange, and a side of the outer portion of getting rid of oily flange 3-1 of described seal ring 3 has circular conical surface.
As shown in Figure 1, 2, described bearing seat 6 outer ends have radial flange 6-2, form annular intercepting basin 6-3 between radial flange 6-2 and bearing seat 6 outer walls.
As shown in Figure 1, 2, axially continue excessive for reducing lubricating oil along seal ring 3, getting rid of between oily flange 3-1 and the seal ring second flange 3-2 on the described seal ring 3 is provided with circular groove 3-7, and circular groove 3-7 bottom is provided with sharp flange 3-3, and sharp flange 3-3 tip is towards first annular seal space 7.Therefore attached on the seal ring 3 and lubricating oil that enter circular groove 3-7 by the rotation of sharp flange 3-3, be thrown in first annular seal space 7, and converge to the bottom of first annular seal space 7.
As shown in Figure 1, 2, the maximum outside diameter of described seal ring 3 is less than the minimum diameter that is installed in the outer ring of the bearing in the mating holes 6-7 2 on the bearing seat 6.Like this, when assembling, gear case can make the outer ring of bearing 2 be encased among the mating holes 6-7 on the bearing seat 6 and after seal ring 3 was installed on the S. A. 1, the bearing seat 6 that will assemble bearing 2 outer rings again was installed on the casing 9; And when opening and inspecting, bearing seat 6 can be pulled down together with the outer ring of bearing 2, and needn't earlier seal ring 3 be returned from S. A. 1, be convenient to the dismounting and the maintenance of gear case, reduced the dismounting maintenance cost.
As shown in Figure 1, 2, seal process of the present utility model is as follows, when the gear case normal operation, because the rotation of gear and bearing 2 makes the gear case internal pressure be higher than the gear case outside, thus cause parts of lubricating oil in the gear case by bearing seat 6 the 3rd sealing flange 6-8 and the seal ring second flange 3-2 between first radial clearance seals 8 that forms spill into vertically in first annular seal space 7.Because the oil gas that first annular seal space 7 overflows for gear case inside has depressurization preferably, therefore a lubricating oil part of overflowing directly is flowed to cavity bottom along first annular seal space, 7 inwalls, and flows back in the gear case by fuel return hole 6-6., be thrown in first annular seal space 7, and converge to first annular seal space, 7 bottoms by the rotation of sharp flange 3-3 attached on the seal ring 3 and lubricating oil that enter circular groove 3-7.Though having, the rotation of seal ring 3 radially gets rid of functional oil, but because rotating speed is limited, oil all can not be got rid of to radially, part lubricating oil can be attached to continuing excessive on the seal ring 3 vertically and entering the position, gap of getting rid of between oily flange 3-1 and the bearing seat first sealing flange 6-5, being got rid of oily flange 3-1 at last is thrown in first annular seal space 7, finally, the lubricating oil that overflows converges in the bottom of first annular seal space 7 and is back in the gear case by the fuel return hole 6-6 that communicates with gear case inside, realizes the circulation of lubricating oil in the gear case.Simultaneously because the bearing seat first sealing flange 6-5 on the bearing seat 6 is oblique flange, form annular catcher groove 6-4 between this oblique flange and first annular seal space, 7 inwalls, thereby make parts of lubricating oil on first annular seal space, 7 inwalls be back to the bottom of first annular seal space 7 along annular catcher groove 6-4, prevent that effectively lubricating oil from directly entering in the labyrinth clearance that connects the position between first annular seal space 7, second annular seal space 5, thus the possibility of avoiding lubricating oil to continue to leak from the labyrinth clearance position that forms between bearing seat 6 and the seal ring 3.The radial flange 6-2 of bearing seat 6 outer ends and the effect of annular intercepting basin 6-3 are that collection exterior sleet water of gear case or cleaning liquid etc. also make it along annular intercepting basin 6-3 to flow down, and avoid it to flow directly into gear case hermetically-sealed construction inside; After on a small quantity entering hermetically-sealed construction in-to-in foreign material or liquid and enter second annular seal space 5 by second radial clearance seals 4 between bearing seat 6 and the seal ring 3, because the rotation of seal ring 3, make foreign material or liquid converge to second annular seal space, 5 bottoms, and be discharged to the gear case outside by the through hole 6-1 of its bottom.Simultaneously, for preventing that the foreign material that enter second annular seal space 5 from further entering in the labyrinth seal structure that connects the position between first annular seal space 7 and second annular seal space 5, the bearing seat second sealing flange 6-9 stretches among the second seal groove 3-5 of seal ring 3 and forms radially little clearance seal and labyrinth seal structure, and it is inner and cause lubricant pollution in the gear case that the foreign material that effectively prevent to enter second annular seal space 5 further enter hermetically-sealed construction.
The utility model has realized that the gear case rotation connects the dual face seals function at position, effectively avoided the leakage and the outside foreign material of gear case of gear box lubricating oil to enter the lubricated wet goods of gear case internal contamination, reduced the axial dimension of gear case hermetically-sealed construction, realize the nothing wearing and tearing at gear case sealing position, effectively reduced the maintenance cost of gear case.
Claims (7)
1. city rail vehicle gear case hermetically-sealed construction comprises the bearing seat (6) that is fixed on the casing (9) and is fixed on seal ring (3) on the S. A. (1), it is characterized in that:
A, described bearing seat (6) have the mating holes (6-7) of the outer ring of installation bearing (2), also have bearing seat first sealing flange (6-5), bearing seat second sealing flange (6-9), bearing seat the 3rd sealing flange (6-8) and bearing seat the 4th sealing flange (6-10), form first seal groove (6-11) between bearing seat first sealing flange (6-5) and bearing seat second sealing flange (6-9);
Have seal ring first flange (3-4) and seal ring second flange (3-2), seal ring the 3rd flange (3-6) on b, the described seal ring (3), get rid of oily flange (3-1) and second seal groove (3-5);
Bearing seat the 3rd sealing flange (6-8) of c, described bearing seat (6) is corresponding with seal ring second flange (3-2) of seal ring (3) and form first radial clearance seals (8);
Bearing seat the 4th sealing flange (6-10) of d, described bearing seat (6) is corresponding with seal ring the 3rd flange (3-6) of seal ring (3) and form second radial clearance seals (4);
Bearing seat second sealing flange (6-9) of e, described bearing seat (6) is stretched in second seal groove (3-5) of seal ring (3), and first flange (3-4) of described seal ring (3) is stretched and form labyrinth packing in first seal groove (6-11) of bearing seat (6) simultaneously;
Also form first annular seal space (7) and second annular seal space (5) between f, described bearing seat (6) and the seal ring (3), first annular seal space (7) is positioned between first radial clearance seals (8) and the labyrinth packing, and second annular seal space (5) is positioned between labyrinth packing and second radial clearance seals (4);
The oily flange (3-1) that gets rid of of g, described seal ring (3) is stretched in first annular seal space (7);
H, described bearing seat (6) go up and the bottom that is positioned at first annular seal space (7) is provided with the fuel return hole (6-6) that communicates with gear case inside,
I, described bearing seat (6) go up and the bottom that is positioned at second annular seal space (5) is provided with through hole (6-1) with the gear case exterior.
2. city rail vehicle gear case hermetically-sealed construction according to claim 1, it is characterized in that: bearing seat first sealing flange (6-5) on the described bearing seat (6) is oblique flange, forms annular catcher groove (6-4) between this oblique flange and first annular seal space (7) inwall.
3. city rail vehicle gear case hermetically-sealed construction according to claim 1 is characterized in that: the oily flange (3-1) that gets rid of of described seal ring (3) is a radial flange.
4. according to claim 1 or 2 or 3 described city rail vehicle gear case hermetically-sealed constructions, it is characterized in that: a side of the outer portion of getting rid of oily flange (3-1) of described seal ring (3) has circular conical surface.
5. city rail vehicle gear case hermetically-sealed construction according to claim 1 is characterized in that: described bearing seat (6) outer end has radial flange (6-2), forms annular intercepting basin (6-3) between radial flange (6-2) and bearing seat (6) outer wall.
6. city rail vehicle gear case hermetically-sealed construction according to claim 1, it is characterized in that: getting rid of between oily flange (3-1) and seal ring second flange (3-2) on the described seal ring (3) is provided with circular groove (3-7), circular groove (3-7) bottom is provided with sharp flange (3-3), and sharp flange (3-3) tip is towards first annular seal space (7).
7. city rail vehicle gear case hermetically-sealed construction according to claim 1 is characterized in that: the maximum outside diameter of described seal ring (3) is gone up the minimum diameter of the outer ring of the bearing (2) in the mating holes (6-7) less than being installed in bearing seat (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020669122 CN201901158U (en) | 2010-12-20 | 2010-12-20 | Urban rail vehicle gearbox sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020669122 CN201901158U (en) | 2010-12-20 | 2010-12-20 | Urban rail vehicle gearbox sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201901158U true CN201901158U (en) | 2011-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020669122 Expired - Lifetime CN201901158U (en) | 2010-12-20 | 2010-12-20 | Urban rail vehicle gearbox sealing structure |
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| CN (1) | CN201901158U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009663A (en) * | 2010-12-20 | 2011-04-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gear case sealing structure of urban rail vehicle |
| CN102954194A (en) * | 2011-08-30 | 2013-03-06 | 常州市瑞泰工程机械有限公司 | Railway vehicle traveling gearbox sealing structure |
| CN103322169A (en) * | 2013-06-28 | 2013-09-25 | 中国北车集团大连机车研究所有限公司 | Shaft-end oil-gas sealing mechanism for transmission cases |
| CN103630357A (en) * | 2013-11-29 | 2014-03-12 | 四川禧鑫机床制造有限责任公司 | Driven box of numerical control bevel gear checking machine |
| CN104747723A (en) * | 2015-03-04 | 2015-07-01 | 苏州通润驱动设备股份有限公司 | Efficient shaft sealing structure of screw compressor |
| CN106015352A (en) * | 2016-05-08 | 2016-10-12 | 湖南中通电气股份有限公司 | Improvement method of drive bearing for traction motor |
| WO2017026300A1 (en) * | 2015-08-12 | 2017-02-16 | Ntn株式会社 | Sealing device for bearing housing |
| 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 |
| 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 |
| CN110173400A (en) * | 2019-05-30 | 2019-08-27 | 中车永济电机有限公司 | Compact half-direct-drive wind driven generator oil path sealing structure |
| CN111022343A (en) * | 2019-12-19 | 2020-04-17 | 烟台菱辰能源有限公司 | Centrifugal air compressor |
-
2010
- 2010-12-20 CN CN 201020669122 patent/CN201901158U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009663A (en) * | 2010-12-20 | 2011-04-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gear case sealing structure of urban rail vehicle |
| CN102009663B (en) * | 2010-12-20 | 2012-07-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gear case sealing structure of urban rail vehicle |
| CN102954194A (en) * | 2011-08-30 | 2013-03-06 | 常州市瑞泰工程机械有限公司 | Railway vehicle traveling gearbox sealing structure |
| CN102954194B (en) * | 2011-08-30 | 2015-04-22 | 常州市瑞泰工程机械有限公司 | Railway vehicle traveling gearbox sealing structure |
| CN103322169A (en) * | 2013-06-28 | 2013-09-25 | 中国北车集团大连机车研究所有限公司 | Shaft-end oil-gas sealing mechanism for transmission cases |
| CN103630357A (en) * | 2013-11-29 | 2014-03-12 | 四川禧鑫机床制造有限责任公司 | Driven box of numerical control bevel gear checking machine |
| CN104747723A (en) * | 2015-03-04 | 2015-07-01 | 苏州通润驱动设备股份有限公司 | Efficient shaft sealing structure of screw compressor |
| WO2017026300A1 (en) * | 2015-08-12 | 2017-02-16 | Ntn株式会社 | Sealing device for bearing housing |
| 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 |
| CN106015352A (en) * | 2016-05-08 | 2016-10-12 | 湖南中通电气股份有限公司 | Improvement method of drive bearing for traction motor |
| CN106555868A (en) * | 2017-01-19 | 2017-04-05 | 郑州机械研究所 | MPV (Multi-Purpose Vehicle) axle gear box sealing 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 |
| CN110173400A (en) * | 2019-05-30 | 2019-08-27 | 中车永济电机有限公司 | Compact half-direct-drive wind driven generator oil path sealing structure |
| CN110173400B (en) * | 2019-05-30 | 2021-03-26 | 中车永济电机有限公司 | Compact semi-direct-drive wind driven generator oil way sealing structure |
| CN111022343A (en) * | 2019-12-19 | 2020-04-17 | 烟台菱辰能源有限公司 | Centrifugal air compressor |
| CN111022343B (en) * | 2019-12-19 | 2022-07-15 | 烟台东德氢能技术有限公司 | Centrifugal air compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110720 Effective date of abandoning: 20120725 |