CN111006019A - Multi-stage elastic tracking sealing device - Google Patents
Multi-stage elastic tracking sealing device Download PDFInfo
- Publication number
- CN111006019A CN111006019A CN201911221219.3A CN201911221219A CN111006019A CN 111006019 A CN111006019 A CN 111006019A CN 201911221219 A CN201911221219 A CN 201911221219A CN 111006019 A CN111006019 A CN 111006019A
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- Prior art keywords
- wedge
- shaped
- rotating shaft
- sealing ring
- adjusting
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/324—Arrangements for lubrication or cooling of the sealing itself
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides a multistage elastic tracking sealing device which comprises a rotating shaft and an annular sealing body arranged on the outer peripheral side of the rotating shaft, wherein the axial inner side of the sealing body is provided with an oil groove, even wedge-shaped grooves are uniformly distributed on the annular inner side of the sealing body close to the rotating shaft, a wedge-shaped self-adjusting sealing ring is arranged in each wedge-shaped groove, and is pushed by an axial elastic element and a radial elastic element to be in close contact with the wedge-shaped grooves and the outer peripheral surface of the rotating shaft. The wedge-shaped self-adjusting sealing ring is provided with a gap transmitter towards the peripheral surface of the rotating shaft, the wedge-shaped self-adjusting sealing ring is further fixedly connected with a gap adjusting rod, the gap adjusting rod is in power connection with the accurate transmission unit, the accurate transmission unit and the gap transmitter are both connected with a digital display control panel, so that an automatic gap adjusting function is formed, the wedge-shaped self-adjusting sealing ring can be guaranteed to always operate in a zero-gap state when contacting with the peripheral surface of the rotating shaft, the installation is convenient, the operation control program is simple and easy to operate, and oil mist can be prevented from escaping.
Description
Technical Field
The invention relates to a multistage elastic tracking sealing device, which is mainly used for sealing a rotating shaft bearing of a large-scale generator set.
Background
At present, large-scale rotating machinery equipment in operation is all designed with bearing oil tanks, such as a turbo generator set, a water turbine generator set, a thermal power generator set and the like, a large amount of lubricating oil needs to be placed in the bearing oil tanks to lubricate and dissipate heat of bearing bushes, and because the dynamic and static joints need to be sealed, the contact type sealing, labyrinth type sealing, felt sealing, comb tooth type sealing and other forms are adopted at present.
The oil leakage and the oil throwing of the generator set bearing box cause serious surface pollution of a generator, the oil leakage and the oil throwing of the generator set bearing box cause large loss of turbine oil in the generator set, the running environment of the generator set is not good, oil needs to be frequently filled into an oil groove, the workload of daily maintenance is increased, the maintenance times of the generator are greatly increased, labor and time are wasted, and the running cost of the generator set is increased. Oil mist phenomenon of an oil groove of a large-scale generator set is highly valued by engineering technicians.
Disclosure of Invention
The invention aims to: the utility model provides a multistage elasticity trails sealing device, solves the above-mentioned technical problem that exists among the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a sealing device is trailed to multistage elasticity, includes the pivot and installs the annular seal at pivot periphery side, and the axial inboard of seal is oil groove, its characterized in that:
an even number of wedge-shaped grooves are uniformly distributed on the circumferential inner side, close to the rotating shaft, of the sealing body, a wedge-shaped self-adjusting sealing ring is mounted in each wedge-shaped groove, an expanding inclined surface is arranged in each wedge-shaped groove, the inner diameter of each wedge-shaped groove is increased along with the increase of the depth of each wedge-shaped groove, a wedge-shaped surface matched with the appearance of the expanding inclined surface is arranged at one end, located in each wedge-shaped groove, of each wedge-shaped self-adjusting sealing ring, and a radial elastic element is arranged between one side, opposite to the wedge-shaped surface, of each wedge-shaped self-; and a compressed axial elastic element is arranged between the wedge-shaped self-adjusting sealing ring and the bottom of the wedge-shaped groove, and the axial elastic element enables one end of the wedge-shaped self-adjusting sealing ring, which is exposed out of the wedge-shaped groove, to be closely connected with the outer peripheral surface of the rotating shaft.
The multi-stage elastic tracking sealing device, wherein: the wedge self-adjusting sealing ring is provided with a gap transmitter towards the outer peripheral surface of the rotating shaft, the wedge self-adjusting sealing ring is further fixedly connected with a gap adjusting rod, the gap adjusting rod penetrates through the groove bottom of the wedge-shaped groove and is in power connection with an accurate transmission unit, and the accurate transmission unit and the gap transmitter are connected with a digital display control panel arranged outside the sealing body.
The multi-stage elastic tracking sealing device, wherein: the precise transmission unit is a stepping motor.
The multi-stage elastic tracking sealing device, wherein: the axial outer side of the wedge-shaped self-adjusting sealing ring is provided with a layer of air baffle plate, the axial inner side of the wedge-shaped self-adjusting sealing ring is provided with two layers of air baffle plates, one end of each air baffle plate is fixed in a radial groove of the sealing body in an embedding mode, and the other end of each air baffle plate is connected with the outer peripheral surface of the rotating shaft in an airtight mode through a sealing plate which can be disassembled and replaced.
The multi-stage elastic tracking sealing device, wherein: and a positioning baffle is arranged on the inner side of the gas baffle plate which is most close to the inner side, one end of the positioning baffle is embedded into the sealing body, and the other end of the positioning baffle is in linear contact with the outer peripheral side of the rotating shaft.
The multi-stage elastic tracking sealing device, wherein: and a self-elastic seal is further arranged between the gas baffle plate which is most close to the inner side and the positioning baffle plate, and the self-elastic seal is fixed in a groove of the seal body in an embedding mode and is in interference contact with the rotating shaft.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the wedge-shaped self-adjusting sealing ring is arranged on the sealing body and is made of a non-metal high polymer self-lubricating material, so that a good self-lubricating effect is ensured on one side of the wedge-shaped self-adjusting sealing ring, which is in contact with the peripheral surface of the rotating shaft. An axial elastic element and a radial elastic element are arranged between the wedge-shaped self-regulating sealing ring and the sealing body, so that the wedge-shaped self-regulating sealing ring can always have a movement trend towards the peripheral surface of the rotating shaft, and the wedge-shaped self-regulating sealing ring and the sealing body can be reliably sealed in the wedge-shaped groove. The wedge-shaped self-adjusting sealing ring is provided with a gap transmitter and is connected with an accurate transmission unit, so that the gap between the wedge-shaped self-adjusting sealing ring and the peripheral surface of the rotating shaft is always smaller than a set value.
Drawings
FIG. 1 is a schematic view of the overall structure of a multi-stage resilient tracking seal provided by the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1 showing the mounting structure thereof;
fig. 3 is a sectional view taken along line B-B of fig. 1, showing a gap adjusting structure thereof.
Description of reference numerals: 1, sealing a body; 2; the end face is connected with a bolt; 3, rotating a shaft; 4, a wedge-shaped self-adjusting sealing ring; 5, a gas baffle plate; 6, replacing the sealing plate; 7 self-elastic sealing; 8, positioning a baffle plate; 9 an axial elastic element; 10 a radial elastic element; 11 digital display gap transmitter; 12 a precision transmission unit; 13 a gap adjusting rod; 14, a digital display control panel; and (B) an oil groove A.
Detailed Description
Some specific embodiments of the invention will be described in detail below, by way of example and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
As shown in fig. 1-3, the invention provides a multistage elastic tracking sealing device, which comprises a rotating shaft 3 and an annular sealing body 1 arranged on the outer peripheral side of the rotating shaft 3, wherein the axial inner side of the sealing body 1 is provided with an oil groove a, and the sealing body 1 is connected with a unit through an end face connecting bolt 2;
an even number of wedge-shaped grooves are uniformly distributed on the circumferential inner side, close to the rotating shaft 3, of the sealing body 1, a wedge-shaped self-adjusting sealing ring 4 is mounted in each wedge-shaped groove, an expanding inclined plane is arranged in each wedge-shaped groove, the inner diameter of each wedge-shaped groove is increased along with the increase of the depth of each wedge-shaped groove, a wedge-shaped surface matched with the appearance of the expanding inclined plane is arranged at one end, located in each wedge-shaped groove, of each wedge-shaped self-adjusting sealing ring 4, and a radial elastic element 10 is arranged between one side, opposite to the wedge-shaped surface, of each wedge-shaped self-adjusting sealing; a compressed axial elastic element 9 is arranged between the wedge-shaped self-adjusting sealing ring 4 and the bottom of the wedge-shaped groove, and the axial elastic element 9 enables one end of the wedge-shaped self-adjusting sealing ring 4, which is exposed out of the wedge-shaped groove, to be tightly connected with the peripheral surface of the rotating shaft 3;
in addition, a gap transmitter 11 is arranged on the periphery of the wedge-shaped self-adjusting sealing ring 4 facing the rotating shaft 3, a gap adjusting rod 13 is fixedly connected to the wedge-shaped self-adjusting sealing ring 4, the gap adjusting rod 13 penetrates through the bottom of the wedge-shaped groove to be in power connection with a precise transmission unit 12 (such as a stepping motor), and the precise transmission unit 12 and the gap transmitter 11 are both connected with a digital display control panel 14 arranged outside the sealing body 1; the gap transmitter 11 can accurately measure the gap between the wedge-shaped self-adjusting sealing ring 4 and the outer peripheral surface of the rotating shaft 3, and send the measured gap to the digital display control panel 14, the digital display control panel 14 can display the measured gap, when the measured gap is larger than a set value, the digital display control panel 14 sends a signal to the accurate transmission unit 12, the accurate transmission unit 12 drives the gap adjusting rod 13 to act, so that the wedge-shaped self-adjusting sealing ring 4 is close to or far away from the outer peripheral surface of the rotating shaft 3, and the gap is enabled to return to the set value.
A layer of air baffle plate 5 is arranged on the axial outer side of the wedge-shaped self-adjusting sealing ring 4, two layers of air baffle plates 5 are arranged on the axial inner side, one end of each air baffle plate 5 is fixed in a radial groove of the sealing body 1 in an embedding mode, and the other end of each air baffle plate is hermetically connected with the outer peripheral surface of the rotating shaft 3 through a sealing plate 6 which can be disassembled and replaced; the air baffle 5 has excellent self-lubricating performance, the friction coefficient is extremely small, and the air baffle is high-temperature resistant and friction resistant, under the action of wind pressure, the air baffle 5 can be inflated automatically to be expanded to be tightly attached to the rotating shaft 3, so that the best sealing state is achieved, and particularly, when the wind pressure is increased, the air baffle 5 and the rotating shaft 3 can be attached more tightly, so that the oil mist is effectively prevented from escaping.
Be equipped with locating baffle 8 in the inboard that leans on inboard gas baffle 5, 8 one end imbeds of locating baffle the seal 1, the other end forms linear contact with the periphery side of pivot 3, can enough play the automatic positioning effect when the installation, can play the sealing effect when the operation again to the pivot 3 not damaged when the operation.
The most inboard gas baffle 5 with still be equipped with from elastic seal 7 between the locating baffle 8, in elastic seal 7 was fixed in the recess of seal 1 through the scarf joint mode, formed the interference relation contact with pivot 3, make pivot 3 when the operation, can guarantee to contact with pivot 3 zero clearance all the time from elastic seal 7.
Therefore, the main parts of the multi-stage elastic tracking device provided by the invention have the following functions:
(1) sealing body 1
The light material is adopted, so that the use requirements of strength and hardness are met, and the installation, adjustment, maintenance and maintenance of the product are facilitated.
(2) Wedge-shaped self-adjusting sealing ring 4
The wedge-shaped self-adjusting sealing ring 4 is equally divided into a plurality of even number equal parts according to the circumferential direction.
The compensation and retreat functions are realized, each halving of the wedge-shaped self-adjusting sealing ring 4 can move forward and retreat in the radial direction after being halved, the sensitivity is high, and the wedge-shaped self-adjusting sealing ring 4 can be kept to track with the rotating shaft 3 all the time under the condition that the rotating shaft 3 swings in the radial direction.
The wedge-shaped self-adjusting sealing ring 4 is made of a non-metal high-polymer self-lubricating material, has the characteristics of oil resistance, high temperature resistance, aging resistance, chemical corrosion resistance and the like, has a good self-lubricating function, and has a very small friction coefficient.
(3) Air baffle 5
The air baffle 5 has excellent self-lubricating property, extremely small friction coefficient, high temperature resistance and abrasion resistance. Under the effect of wind pressure, the air baffle 5 can be automatically and closely attached to the rotating shaft 3 to achieve the best sealing state, and particularly, when the wind pressure is increased, the air baffle 5 and the rotating shaft 3 can be attached more closely to effectively prevent oil mist from escaping.
The replaceable sealing plate 6 is fixed on the air baffle 5 in an embedding mode, the air baffle 5 embedded in the sealing body 1 can be kept still during maintenance, and the sealing part contacting the air baffle 5 and the peripheral surface of the rotating shaft 3 is detached and replaced by a new part, so that the operation is simple and the replacement is easy.
(4) Self-elastic seal 7
The self-elastic seal 7 has the characteristics of wear resistance, high temperature resistance, chemical corrosion resistance and the like, has good insulating property, adopts an infinite point contact form with the rotating shaft 3, is in interference connection, and can effectively prevent oil mist from escaping.
(5) Positioning baffle 8
The shaft sealing device is made of non-metal materials, plays a role in automatic positioning during installation, can play a role in sealing, and does not damage the rotating shaft 3 when the unit operates.
(6) Digital display gap transmitter 11
The device is arranged between the wedge-shaped self-adjusting sealing ring 4 and the peripheral surface of the rotating shaft 3, can accurately convey the gap between the wedge-shaped self-adjusting sealing ring 4 and the peripheral surface of the rotating shaft 3, and simultaneously automatically conveys the numerical value to the digital display control panel 14 for analysis.
(7) Digital display control panel 14
An automatic control system is integrated in the digital display control panel 14, when the digital display gap transmitter 11 automatically transmits that the gap between the wedge-shaped self-regulating sealing ring 4 and the outer peripheral surface of the rotating shaft 3 is larger than a set value, the digital display control panel 14 can automatically analyze the input data to drive at least one precise transmission unit 12 to push a gap adjusting rod 13 to act, under the action of at least one axial elastic element 9, the gap between the wedge-shaped self-regulating sealing ring 4 and the outer peripheral surface of the rotating shaft 3 reaches a set value, the wedge-shaped self-regulating sealing ring 4 is ensured to always run in a zero-gap state with the outer peripheral surface of the rotating shaft 3, and the oil groove A in.
(8) Axial spring element 9
The axial elastic elements 9 are uniformly distributed on the rear side of the wedge-shaped self-adjusting sealing ring 4 along the circumference, and are accurately adjusted during installation, so that the stress of the circumferential wedge-shaped self-adjusting sealing ring 4 in centripetal motion is uniform when the rotating shaft 3 deflects.
(9) Radial spring element 10
At least one radial elastic element 10 is distributed on the sealing body 1 and arranged above the contact plane of the wedge-shaped self-adjusting sealing ring 4 and the groove of the sealing body 1, and the contact plane of the wedge-shaped self-adjusting sealing ring 4 and the wedge-shaped groove of the sealing body 1 can be kept sealed reliably under the action of the radial elastic element 10.
According to the invention, the wedge-shaped self-adjusting sealing ring 4 is arranged on the sealing body 1, and the wedge-shaped self-adjusting sealing ring 4 is made of a non-metal high polymer self-lubricating material, so that the side, contacting with the outer peripheral surface of the rotating shaft 3, of the wedge-shaped self-adjusting sealing ring 4 is ensured to have a good self-lubricating effect. An axial elastic element 9 and a radial elastic element 10 are arranged between the wedge-shaped self-regulating sealing ring 4 and the sealing body 1, so that the wedge-shaped self-regulating sealing ring 4 can always have a movement trend towards the direction of the outer peripheral surface of the rotating shaft 3, and the wedge-shaped self-regulating sealing ring 4 and the sealing body 1 can be kept to be sealed reliably in a wedge-shaped groove. The wedge-shaped self-adjusting sealing ring 4 is provided with a gap transmitter 11 and is connected with an accurate transmission unit 12, so that the gap between the wedge-shaped self-adjusting sealing ring 4 and the peripheral surface of the rotating shaft 3 is always smaller than a set value.
In a word, the multistage elastic tracking device provided by the invention can be completely operated through program automation control, and in the long-time operation process of the unit, the wedge-shaped self-adjusting sealing ring 4 can be ensured to be always operated in a zero-clearance state when contacting with the peripheral surface of the rotating shaft 3 through an automatic clearance adjusting function, so that the multistage elastic tracking device is convenient to install, the operation control program is simple and easy to operate, and oil mist in the oil groove A can be prevented from escaping.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221219.3A CN111006019A (en) | 2019-12-03 | 2019-12-03 | Multi-stage elastic tracking sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911221219.3A CN111006019A (en) | 2019-12-03 | 2019-12-03 | Multi-stage elastic tracking sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111006019A true CN111006019A (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911221219.3A Pending CN111006019A (en) | 2019-12-03 | 2019-12-03 | Multi-stage elastic tracking sealing device |
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| CN (1) | CN111006019A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217245A (en) * | 2021-05-12 | 2021-08-06 | 海盐孚邦机械有限公司 | High-precision automobile oil outlet valve joint |
| CN115288911A (en) * | 2022-06-17 | 2022-11-04 | 华能澜沧江水电股份有限公司 | Intelligent online monitoring system and method for bearing oil groove of generator set |
| CN116241660A (en) * | 2020-11-02 | 2023-06-09 | 中国长江电力股份有限公司 | How to use the self-pump self-regulating circulation sealing system |
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| KR20010014707A (en) * | 1999-04-12 | 2001-02-26 | 후지 하루노스케 | Low load seal |
| JP2002122243A (en) * | 2000-10-17 | 2002-04-26 | Eagle Ind Co Ltd | Split type seal |
| TWM264401U (en) * | 2004-09-30 | 2005-05-11 | Mfc Sealing Technology Co Ltd | Sealing structure |
| CN1648498A (en) * | 2004-01-30 | 2005-08-03 | 李荣耀 | Gap-less shaft seal |
| CN101023289A (en) * | 2004-09-17 | 2007-08-22 | 日本华尔卡工业株式会社 | Composite sealant |
| CN200975484Y (en) * | 2005-12-17 | 2007-11-14 | 吴雳鸣 | Ring shaped double-layer three surface sealing device |
| US20090322031A1 (en) * | 2008-05-22 | 2009-12-31 | Stein Seal Company | Windback device |
| CN107100999A (en) * | 2017-05-27 | 2017-08-29 | 李荣耀 | Mirror oil centrifugal seal device |
| CN211525537U (en) * | 2019-12-03 | 2020-09-18 | 福建棉花滩水电开发有限公司 | Multi-stage elastic tracking sealing device |
-
2019
- 2019-12-03 CN CN201911221219.3A patent/CN111006019A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010014707A (en) * | 1999-04-12 | 2001-02-26 | 후지 하루노스케 | Low load seal |
| JP2002122243A (en) * | 2000-10-17 | 2002-04-26 | Eagle Ind Co Ltd | Split type seal |
| CN1648498A (en) * | 2004-01-30 | 2005-08-03 | 李荣耀 | Gap-less shaft seal |
| CN101023289A (en) * | 2004-09-17 | 2007-08-22 | 日本华尔卡工业株式会社 | Composite sealant |
| TWM264401U (en) * | 2004-09-30 | 2005-05-11 | Mfc Sealing Technology Co Ltd | Sealing structure |
| CN200975484Y (en) * | 2005-12-17 | 2007-11-14 | 吴雳鸣 | Ring shaped double-layer three surface sealing device |
| US20090322031A1 (en) * | 2008-05-22 | 2009-12-31 | Stein Seal Company | Windback device |
| CN107100999A (en) * | 2017-05-27 | 2017-08-29 | 李荣耀 | Mirror oil centrifugal seal device |
| CN211525537U (en) * | 2019-12-03 | 2020-09-18 | 福建棉花滩水电开发有限公司 | Multi-stage elastic tracking sealing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116241660A (en) * | 2020-11-02 | 2023-06-09 | 中国长江电力股份有限公司 | How to use the self-pump self-regulating circulation sealing system |
| CN113217245A (en) * | 2021-05-12 | 2021-08-06 | 海盐孚邦机械有限公司 | High-precision automobile oil outlet valve joint |
| CN115288911A (en) * | 2022-06-17 | 2022-11-04 | 华能澜沧江水电股份有限公司 | Intelligent online monitoring system and method for bearing oil groove of generator set |
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Application publication date: 20200414 |