CN104074795A - High-speed shaft seal structure - Google Patents
High-speed shaft seal structure Download PDFInfo
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- CN104074795A CN104074795A CN201410332495.8A CN201410332495A CN104074795A CN 104074795 A CN104074795 A CN 104074795A CN 201410332495 A CN201410332495 A CN 201410332495A CN 104074795 A CN104074795 A CN 104074795A
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- oil
- gear
- box
- seal
- shrouding
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Of Bearings (AREA)
Abstract
The invention relates to a high-speed shaft seal structure which comprises a gear case. A shaft and a bearing are mounted in the gear case. The bearing supports the shaft. An impeller is connected to the end of the shaft. An oil seal ring is arranged on one side of the bearing. The oil seal ring is fixed to the gear case through bolts. An oil return cavity is formed between the oil seal ring and the gear case. The lower end of the oil return cavity is provided with an oil return hole. A sealing plate is arranged on the side, close to the impeller, of the gear case. The sealing plate is fixed to the gear case through screws. A groove is formed in the sealing plate. A labyrinth air seal is mounted in the groove of the sealing plate. The labyrinth air seal is fixed through an extension spring in the radial direction. An exhaust cavity is formed among the sealing plate, the oil seal ring and the gear case. The gear case is provided with a vent hole. The shaft is provided with an air slinger and an oil slinger respectively. The high-speed shaft seal structure is simple in structure and reasonable in design, the seal ring is protected against damage, and oil and air are completely separated in the working process and can not adhere to other internal parts and cause corrosion, so that the service life of a high-speed centrifugal fan is longer.
Description
Technical field
The present invention relates to a kind of high speed shaft seal structure, belong to mechanical equipment technical field.
Background technique
In the prior art, because the high speed rotor center of gravity of high-speed centrifugal fan is positioned at outside two bearings fulcrum, when static, high speed rotor is subject to the effect of gravity, first Contact Seal ring.Blower fan is in the moment that starts and shut down; there is friction consumingly in high speed shaft and seal ring; because seal ring is generally made with aluminum alloy; therefore seal ring is easily damaged; and blower fan is when work; the rotating speed of superelevation can make pressurized air and the lubricant oil on axle and bearing in spiral case mix and be attached in blower fan, and this has greatly reduced the working life of blower fan, expends more energy.
Summary of the invention
The object of the invention is in order to solve shortcoming of the prior art, provide a kind of simple in structure, easy to use, not only can to overcome seal ring easily damaged but also can realize effectively separated high speed shaft seal structure of oil and gas.
The present invention adopts following technological scheme: a kind of high speed shaft seal structure, comprise gear-box, axle and bearing are installed in described gear-box, bearings axle, described shaft end is connected with impeller, one side of described bearing is provided with oil seal circle, oil seal circle is bolted on gear-box, between described oil seal circle and gear-box, form oil back chamber, the lower end of oil back chamber is provided with spill port, on the described close gear-box of impeller end one side, be provided with shrouding, described shrouding is fixed by screws on gear-box, in shrouding, be provided with a groove, described labyrinth air seal is arranged in the groove of shrouding, described labyrinth air seal is radially fixed with extension spring, described shrouding, between oil seal circle and gear-box, form exhaust cavity, on described gear-box, be provided with vent, on described axle, be respectively arranged with and get rid of compression ring and disc.
Further, described bearing is tilting-pad bearing.
Further, the inner chamber of described labyrinth air seal is provided with sealing broach, and described sealing broach has 3-5.
Further, between described shrouding groove one side and labyrinth air seal, be provided with wavy spring.
Further, described labyrinth air seal adopts aluminium material to make.
Further, the inner side of described shrouding is stepped.
Further, the inner chamber of described oil seal circle is provided with some sealing broach.
The present invention is simple in structure, reasonable in design, has protected seal ring not to be damaged, and oily, gas is separated in the course of the work completely can not be attached on other inner bodies and cause corrosion, makes the longer service life of high-speed centrifugal fan.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Reference character: axle 1, get rid of compression ring 1-1, disc 1-2, bearing 2, gear-box 3, oil seal circle 4, labyrinth air seal 5, extension spring 6, wavy spring 7, shrouding 8, impeller 9, exhaust cavity 10, vent 11, oil back chamber 12, spill port 13.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1: the present invention includes axle 1, get rid of compression ring 1-1, disc 1-2, bearing 2, gear-box 3, oil seal circle 4, labyrinth air seal 5, extension spring 6, wavy spring 7, shrouding 8, impeller 9, exhaust cavity 10, vent 11, oil back chamber 12, spill port 13.
Axle 1 and bearing 2 are installed, bearing 2 back shafts 1 in gear-box 3; Described bearing 2 is tilting-pad bearing, is respectively arranged with and gets rid of compression ring 1-1 and disc 1-2 on axle 1; Described axle 1 end is connected with impeller 9; One side of described bearing 2 is provided with oil seal circle 4, and oil seal circle 4 is bolted on gear 3, and the inner chamber of oil seal circle 4 is provided with some sealing broach; Between described oil seal circle 4 and gear-box 3, form oil back chamber 12, the lower end of oil back chamber 12 is provided with spill port 13; In shrouding 8, have a groove, with screw, described shrouding 8 is fixed near on the gear-box 3 of impeller 9 end one sides; The inner side of shrouding 8 is stepped, and labyrinth air seal 5 is arranged in shrouding 8 grooves, radially fixing with extension spring 6, is convenient to the dismounting of labyrinth air seal 5; The inner chamber of labyrinth air seal 5 is provided with sealing broach, sealing broach has 5, labyrinth air seal 5 adopts aluminium material to make, between described shrouding 8 groove one sides and labyrinth air seal 5, be provided with wavy spring 7, the setting of wavy spring 7 makes labyrinth air seal 5 near shrouding 8 and prevents that pressurized air from leaking thus; Between described shrouding 8, oil seal circle 4 and gear-box 3, form exhaust cavity 10, be provided with vent 11 on gear-box 3, the setting of vent 11 makes exhaust cavity 10 be communicated with ambient atmosphere.
When static, axle 1 is subject to the effect of gravity, first contacts labyrinth air seal 5, because labyrinth air seal 5 does not have fastening being installed on shrouding 8, makes labyrinth air seal 5 along with axle 1 moves down, and has avoided labyrinth air seal 5 to become the supporting point of axle 1, and has caused damage.
In the moment of fan starting; the axle 1 disalignment position of being omitted starts rotation, and its axis of rotation forms conical precession, and the axis of labyrinth air seal 5 rotates around center line; prevented that labyrinth air seal 5 and axle 1 from violent friction occurring, and has protected labyrinth air seal 5 not damaged.
In the moment of fan parking; axle 1 decelerate is to steadily shutting down; position of center line during from work starts slightly biased decentre line position; its axis of rotation forms conical precession; the axis of labyrinth air seal 5 rotates around center line; prevented that labyrinth air seal 5 and axle 1 from violent friction occurring, and has protected labyrinth air seal 5 not damaged.
When blower fan is normally worked, pressurized air in spiral case can be from the clearance leakage of impeller 9 and gear-box 3 out, labyrinth air seal 5 makes the significantly step-down of air-flow of flowing through, thereby control gas by the leakage rate of this gap, the air leaking out is got rid of to exhaust cavity 10 and leads to ambient atmosphere through vent 11 by the compression ring 1-1 that gets rid of on axle 1 subsequently; Parts of lubricating oil along the clearance leakage of axle 1 and bearing 2 out, the sealing broach of oil seal circle 4 can make the significantly step-down of oil of flowing through, thereby control oily leakage rate, the oil leaking out is got rid of to oil back chamber 12 and flow in gear-box 3 through spill port 13 by the disc 1-2 on axle 1, avoided lubricant oil to enter 10 li of exhaust cavitys, bring pollution, realization is oily effectively, gas is separated, and avoided oil, gas to mix and be attached to the corrosion causing on inner other parts of centrifugal blower, extended the working life of centrifugal blower.
Claims (7)
1. a high speed shaft seal structure, it is characterized in that: comprise gear-box (3), axle (1) and bearing (2) are installed in described gear-box (3), bearing (2) back shaft (1), described axle (1) end is connected with impeller (9), one side of described bearing (2) is provided with oil seal circle (4), oil seal circle (4) is bolted on gear-box (3), between described oil seal circle (4) and gear-box (3), form oil back chamber (12), the lower end of described oil back chamber (12) is provided with spill port (13), described gear-box (3) is provided with shrouding (8) near impeller one side, described shrouding (8) is fixed by screws on gear-box (3), described shrouding is provided with groove in (8), described labyrinth air seal (5) is arranged in shrouding (8) groove, described labyrinth air seal (5) radially uses extension spring (6) fixing, described shrouding (8), between oil seal circle (4) and gear-box (3), form exhaust cavity (10), on described gear-box (3), be provided with vent (11), on described axle (1), be respectively arranged with and get rid of compression ring (1-1) and disc (1-2).
2. a kind of high speed shaft seal structure as claimed in claim 1, is characterized in that: described bearing (2) is tilting-pad bearing.
3. a kind of high speed shaft seal structure as claimed in claim 1, is characterized in that: the inner chamber of described labyrinth air seal (5) is provided with sealing broach, and the number of described sealing broach is 3-5.
4. a kind of high speed shaft seal structure as claimed in claim 1, is characterized in that: between described shrouding (8) groove one side and labyrinth air seal (5), be provided with wavy spring (7).
5. a kind of high speed shaft seal structure as claimed in claim 1, is characterized in that: described labyrinth air seal (5) adopts aluminium material to make.
6. a kind of high speed shaft seal structure as claimed in claim 1, is characterized in that: the inner side of described shrouding (8) is stepped.
7. a kind of high speed shaft seal structure as claimed in claim 1, is characterized in that: the inner chamber of described oil seal circle (4) is provided with some sealing broach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332495.8A CN104074795B (en) | 2014-07-11 | 2014-07-11 | A kind of high speed shaft seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332495.8A CN104074795B (en) | 2014-07-11 | 2014-07-11 | A kind of high speed shaft seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104074795A true CN104074795A (en) | 2014-10-01 |
| CN104074795B CN104074795B (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410332495.8A Active CN104074795B (en) | 2014-07-11 | 2014-07-11 | A kind of high speed shaft seal structure |
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| Country | Link |
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| CN (1) | CN104074795B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331906A (en) * | 2018-03-06 | 2018-07-27 | 杭州前进齿轮箱集团股份有限公司 | A kind of high speed shaft sealing hydrocarbons structure of vertical and high-speed case |
| CN111005893A (en) * | 2019-12-27 | 2020-04-14 | 湖南泛航智能装备有限公司 | High-speed centrifugal fan labyrinth seal structure |
| CN113700833A (en) * | 2021-08-25 | 2021-11-26 | 湖南泛航智能装备有限公司 | Structure and method for balancing pressure of gear box cavity of compressor |
| CN114198485A (en) * | 2021-12-09 | 2022-03-18 | 中国船舶重工集团公司第七0三研究所 | High-speed shafting of centrifugal auxiliary seal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004197848A (en) * | 2002-12-19 | 2004-07-15 | Hitachi Industries Co Ltd | Shaft seal device and turbo compressor |
| CN102094845A (en) * | 2011-03-07 | 2011-06-15 | 江苏金通灵风机股份有限公司 | Shaft seal device of air compressor |
| JP2013044275A (en) * | 2011-08-24 | 2013-03-04 | Ihi Corp | Compressor sealing device |
| CN103452897A (en) * | 2013-09-22 | 2013-12-18 | 无锡杰尔压缩机有限公司 | Modified air seal structure |
| CN204299937U (en) * | 2014-07-11 | 2015-04-29 | 无锡杰尔压缩机有限公司 | A kind of high speed shaft seal structure |
-
2014
- 2014-07-11 CN CN201410332495.8A patent/CN104074795B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004197848A (en) * | 2002-12-19 | 2004-07-15 | Hitachi Industries Co Ltd | Shaft seal device and turbo compressor |
| CN102094845A (en) * | 2011-03-07 | 2011-06-15 | 江苏金通灵风机股份有限公司 | Shaft seal device of air compressor |
| JP2013044275A (en) * | 2011-08-24 | 2013-03-04 | Ihi Corp | Compressor sealing device |
| CN103452897A (en) * | 2013-09-22 | 2013-12-18 | 无锡杰尔压缩机有限公司 | Modified air seal structure |
| CN204299937U (en) * | 2014-07-11 | 2015-04-29 | 无锡杰尔压缩机有限公司 | A kind of high speed shaft seal structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331906A (en) * | 2018-03-06 | 2018-07-27 | 杭州前进齿轮箱集团股份有限公司 | A kind of high speed shaft sealing hydrocarbons structure of vertical and high-speed case |
| CN111005893A (en) * | 2019-12-27 | 2020-04-14 | 湖南泛航智能装备有限公司 | High-speed centrifugal fan labyrinth seal structure |
| CN113700833A (en) * | 2021-08-25 | 2021-11-26 | 湖南泛航智能装备有限公司 | Structure and method for balancing pressure of gear box cavity of compressor |
| CN114198485A (en) * | 2021-12-09 | 2022-03-18 | 中国船舶重工集团公司第七0三研究所 | High-speed shafting of centrifugal auxiliary seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104074795B (en) | 2016-06-29 |
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| C06 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 214106 No. 38, Qian Lian Road, Xishan Economic Development Zone, Xishan District, Jiangsu, Wuxi Applicant after: JIANGSU GL-TURBO CORPORATION Address before: 214101 Jiangsu Province, Wuxi city Xishan District of Xishan Economic Development Zone in three Furong Road No. 99 building six room 507 zuiun Applicant before: Wuxi Jieer Compressor Co., Ltd. |
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: High-speed shaft seal structure Effective date of registration: 20180327 Granted publication date: 20160629 Pledgee: Agricultural Bank of China, Limited by Share Ltd, Wuxi, Xishan branch Pledgor: JIANGSU GL-TURBO CORPORATION Registration number: 2018990000233 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20201014 Granted publication date: 20160629 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi Xishan branch Pledgor: GL-TURBO LLC Registration number: 2018990000233 |