CN105465374A - Oil mist sealing structure of hydraulic generator - Google Patents
Oil mist sealing structure of hydraulic generator Download PDFInfo
- Publication number
- CN105465374A CN105465374A CN201610056202.7A CN201610056202A CN105465374A CN 105465374 A CN105465374 A CN 105465374A CN 201610056202 A CN201610056202 A CN 201610056202A CN 105465374 A CN105465374 A CN 105465374A
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- Prior art keywords
- seal
- sealing
- oil mist
- sealing structure
- bearing
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Abstract
The invention discloses an oil mist sealing structure of a hydraulic generator and belongs to the field of power generation equipment. The oil mist sealing structure is composed of a zero-clearance sealing part and a magnetic liquid sealing part, achieves rotary combined seal and is applicable to bearing oil mist seal of the hydraulic generator from the low speed to the high speed. A sealing shell of a combined sealing device is formed by connecting four bearing sealing covers through bolts. Firstly, four sealing split bodies are installed on the lower portions of the bearing sealing covers, composite flexible materials are adopted in the circumferential direction to connect the four sealing split bodies, zero-clearance sealing is formed under the radial and axial thrust effect of a small spring, and bearing oil mist is well sealed; then, by means of the magnetic liquid seal on the upper portions of the bearing sealing covers, the zero-leakage sealing effect is achieved; by combining the two kinds of seal, air pressure of a sealing cavity formed by the upper seal and the lower seal can be effectively kept, no negative pressure is produced in the cavity, overflow caused by the pressure difference between the high internal pressure and low bearing sealing cover external pressure can be effectively prevented, and the service life of the oil mist seal is prolonged.
Description
Technical field
The invention belongs to field of generating equipment, particularly a kind of hydraulic turbine generator oil mist sealing structure.
Background technique
From water power plant, vertical Hydraulic generator pilot bearing and thrust-bearing feed back the information of coming, getting rid of that oil and mist of oil overflow is maximum problem, long-term mist of oil spilling can cause: the isolation layer that (1) mist of oil and dust over time are adsorbed on stators and rotators causes corrosion to it, cause decreasing insulating, cause generator stator-rotator coil short or puncture, threatening engine health; (2) mist of oil and dust are piled up at stator iron core air duct and rotor magnetic pole air duct place, cause hydro-generator ventilation to dispel the heat and are deteriorated, have a strong impact on radiating effect.Need prevent the mist of oil in hydraulic generator thrust bearing oil groove and guide bearing oil groove from overflowing with sealing at present, avoid polluting atmosphere environment in machine hole and causing damage to generator set.Oil mist sealing divides noncontact seal and contact seal two class, the structure being applied to bearing non-contact formula oil mist sealing has labyrinth seal and labyrinth to add pneumatic mixing to seal two kinds, labyrinth seal structure is simple, and labyrinth gap only increases circulating resistance, but can not prevent the effusion of mist of oil at all.It is utilize aerodynamic force to leak to block mist of oil that labyrinth adds pneumatic mixing sealing, and complex structure, needs to consume extra power.Contact-type oil mist sealing has felt seal and the mechanical seal of spring supporting slide block.Felt seal self lubricity is poor, wears no resistance, and fundamentally can not solve the effusion of mist of oil.The mechanical seal of spring supporting slide block is similar to felt seal, but poor insulativity, complex structure, need to consume source of the gas, cost is high.
Summary of the invention
The object of the invention is to: overcome the deficiencies in the prior art, a kind of hydraulic turbine generator oil mist sealing structure is proposed, be made up of gap-free sealed and magnetic fluid sealing two-part, belong to rotation combination sealing, gap-free sealed have the effect of servo-actuated compensation thus make sealing more effectively with reliable, magnetic fluid sealing is a kind of noncontact seal, the zero leakage to sealed medium can be realized, by the combination of two kinds of sealings, effectively can maintain the air pressure in the seal chamber be made up of lower seal and top seal, negative pressure can not be formed in cavity, effectively can prevent the spilling caused because of internal pressure height and low the formed pressure reduction of bearing seal cover external pressure, improve the working life of oil mist sealing.
Object of the present invention is realized by following technical proposals:
A kind of hydraulic turbine generator oil mist sealing structure, comprise: collar bush, described collar bush outside is provided with bearing seal cover, described bearing seal covers has two annular recess, comprise upper grooves and lower recess, magnetic fluid seal device is provided with in described upper grooves, described magnetic fluid seal device top is provided with pressing plate, described magnetic fluid seal device around collar bush place be provided with insulating bush, described insulating bush outer cover has magnetic conduction axle sleeve, described magnetic conduction axle sleeve and magnetic fluid seal device form magnetic fluid sealing, gapless sealing device is provided with in described lower recess, seal ring is provided with between described insulating bush and collar bush, seal ring is provided with between described insulating bush and magnetic conduction axle sleeve.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, described magnetic fluid seal device, comprise: pole shoe one and pole shoe two and the some permanent magnets be installed between pole shoe one and pole shoe two, be full of magnetic liquid in the gap that described magnetic conduction axle sleeve and pole shoe are formed.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, described gapless sealing device, comprise: primary seal circle, described primary seal circle radial direction is provided with radial pad, described primary seal circle is axially arranged with axial pad, described radial pad and be respectively equipped with horizontal spring and uprighting spring between axial pad and bearing seal cover.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, described primary seal circle is split-type structural, and described primary seal circle is made up of four flap seal splits, is provided with buffering connection pad between described every flap seal split.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, described every flap seal split radial direction has pin hole, and described pin hole is built with stop pin, and described stop pin is fixed on bearing seal cover.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, is provided with some ring-types and disappears power groove on described primary seal circle and between the surface of contact of collar bush, reduce friction, reduces heating.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, adopts outer-hexagonal bolts to connect between described pressing plate and bearing seal cover.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, adopts socket head screw to connect between described magnetic conduction axle sleeve and insulating bush.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, is provided with abrasion-proof insulating cover between described pressing plate and magnetic conduction axle sleeve.
A kind of hydraulic turbine generator oil mist sealing structure of the present invention, described pole shoe one and pole shoe two are respectively equipped with seal ring with bearing seal cover in radial direction.
According to technique scheme, the invention has the beneficial effects as follows: propose a kind of hydraulic turbine generator oil mist sealing structure, be made up of gap-free sealed and magnetic fluid sealing two-part, belong to rotation combination sealing, gap-free sealed have the effect of servo-actuated compensation thus make sealing more effectively with reliable, magnetic fluid sealing is a kind of noncontact seal, the zero leakage to sealed medium can be realized, fundamentally prevent the leakage of mist of oil, be applicable to bearing of hydraulic generator oil mist sealing from low speed to high speed.
Accompanying drawing explanation
Fig. 1 is a kind of hydraulic turbine generator oil mist sealing structure of the present invention schematic diagram;
Fig. 2 is the buffering connection pad schematic diagram of a kind of hydraulic turbine generator oil mist sealing structure of the present invention;
Fig. 3 is a kind of hydraulic turbine generator oil mist sealing structure of the present invention primary seal circle partial schematic diagram;
Fig. 4 is pole shoe and the permanent magnet scheme of installation of a kind of hydraulic turbine generator oil mist sealing structure of the present invention;
Mark in figure: the radial pad of 1-bearing seal cover, 2-horizontal spring, 3-, 4-primary seal circle, the axial pad of 5-, 6-uprighting spring, 7-stop pin, 8-pole shoe one, 9-permanent magnet, 10-pole shoe two, 11-outer-hexagonal bolts, 12-pressing plate, 13-magnetic liquid, 14-abrasion-proof insulating cover, 15-magnetic conduction axle sleeve, 16-socket head screw, 17-insulating bush, 18-seal ring, 19-cushion connection pad, 20-pin hole, 21-collar bush, 22-seal ring, 23-seal ring, 24-seal ring.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Be the embodiment of a kind of hydraulic turbine generator oil mist sealing structure of the present invention as Figure 1-4, a kind of hydraulic turbine generator oil mist sealing structure, comprise: collar bush 21, described collar bush 21 outside is provided with bearing seal cover 1, described bearing seal cover 1 have two annular recess, comprise upper grooves and lower recess, magnetic fluid seal device is provided with in described upper grooves, described magnetic fluid seal device top is provided with pressing plate 12, described magnetic fluid seal device around collar bush 21 place be provided with insulating bush 17, described insulating bush 17 outer cover has magnetic conduction axle sleeve 15, described magnetic conduction axle sleeve 15 forms magnetic fluid sealing with magnetic fluid seal device, gapless sealing device is provided with in described lower recess, seal ring 18 is provided with between described insulating bush 17 and collar bush 21, seal ring (23) is provided with between described insulating bush 17 and magnetic conduction axle sleeve 15.。
Said structure is applicable to bearing of hydraulic generator oil mist sealing device, be made up of gap-free sealed and magnetic fluid sealing two-part, belong to rotation combination sealing, be applicable to bearing of hydraulic generator oil mist sealing from low speed to high speed, can effectively prevent axial flow electricity from passing through seal arrangement by the setting of insulating bush 17, the material of usual insulating bush 17 is teflon, and the setting of magnetic conduction axle sleeve 15 is then for magnetic fluid seal device functional realiey provides condition.
Described magnetic fluid seal device, comprise: pole shoe 1 and pole shoe 2 10, and the some permanent magnets 9 be installed between pole shoe 1 and pole shoe 2 10, magnetic liquid 13 is full of in the gap that described upper guide magnetic axis cover and pole shoe are formed, under normal circumstances, pole shoe 1 and have certain gap between pole shoe 2 10 and magnetic conduction axle sleeve 15, magnetic loop is formed by coordinating with permanent magnet 9, permanent magnet 9 is cylindrical permanent magnet, permanent magnet adopts axial charging, the installation direction of all cylinder permanent magnets is consistent, the shape of the annular tooth on pole shoe is rectangle or trapezoidal, to annotate in gap magnetic liquid 13, because magnetic liquid 13 has superparamagnetic characteristic, whole annular space can be full of at magnetic fields magnetic liquid, each ring gear forms " O " RunddichtringO of a ring-shaped liquid, the voltage endurance capability of each annular tooth is between 0.01MPa to 0.035MPa, due to each pole shoe having multiple tracks annular tooth, this just greatly improves the bearing capacity of sealing.Because it is a kind of zero leakage sealing, effectively can prevents the Leakage Gas between the gap-free sealed of stuffing box bearing lid bottom and upper magnetic hydraulic seal, the spilling of mist of oil can not be caused because of inside and outside differential pressure.
Described gapless sealing device, comprise: primary seal circle 4, described primary seal circle 4 radial direction is provided with radial pad 3, described primary seal circle 4 is axially arranged with axial pad 5, described radial pad 3 and be respectively equipped with horizontal spring 2 and uprighting spring 6 between axial pad 5 and bearing seal cover 1, servo-actuated compensation is carried out in the rotation that primary seal circle 4 can be made like this can to follow collar bush 21, and what realize mist of oil is gap-free sealed.
Described primary seal circle 4 is split-type structural, described primary seal circle 4 is made up of four flap seal splits, buffering connection pad 19 is provided with between described every flap seal split, can make like this can keep Dynamic link library between adjacent two flap seal splits, sealing state can be remained when some micro-gaps are changed, buffering connection pad 19 adopts composite and flexible material to make, it is a kind of backlash compensation material, there is oil resistant, heatproof, resistance to chemical attack, insulation, can the features such as compensation be followed, good seal action is had to clearance seal, can the leakage of effectively pre-oil mist prevention.
Described every flap seal split radial direction has pin hole 20, described pin hole 20 is built with stop pin 7, described stop pin 7 is fixed on bearing seal cover 1, sealing split can be prevented so under spring force, while following collar bush rotation compensation, and it is mobile that circumference occurs, cause spring eccentricity compensation, the effect of impact sealing.
Be provided with some ring-types on described primary seal circle 4 and between the surface of contact of collar bush 21 to disappear power groove, the quantity of the power that generally disappears groove is three roads, sealing split can be alleviated like this to the wearing and tearing of collar bush, and skiving is carried out to the disappear contact position of power groove, three roads that contact with collar bush of sealing split, form labyrinth seal, reduce contact stress, subtract and be beneficial to heat radiation etc., the spilling of mist of oil can be prevented well.
Outer-hexagonal bolts 11 is adopted to connect between described pressing plate 12 and bearing seal cover 1, socket head screw 16 is adopted to connect between described magnetic conduction axle sleeve 15 and insulating bush 17, abrasion-proof insulating cover 14 is provided with between described pressing plate 12 and magnetic conduction axle sleeve 15, can prevent the dust in environment from entering in the fuel tank of bearing seal like this, pollute bearing oil, described pole shoe 1 and pole shoe 2 10 are respectively equipped with seal ring with bearing seal cover 1 in radial direction, the magnetic liquid 13 of magnetic fluid seal device itself is made to reveal like this, also ensure that the sealing effect of whole device simultaneously.
According to technique scheme, the invention has the beneficial effects as follows: propose a kind of hydraulic turbine generator oil mist sealing structure, be made up of gap-free sealed and magnetic fluid sealing two-part, belong to rotation combination sealing, gap-free sealed have the effect of servo-actuated compensation thus make sealing more effectively with reliable, magnetic fluid sealing is a kind of noncontact seal, the zero leakage to sealed medium can be realized, fundamentally prevent the leakage of mist of oil, be applicable to bearing of hydraulic generator oil mist sealing from low speed to high speed.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a hydraulic turbine generator oil mist sealing structure, it is characterized in that, comprise: collar bush (21), described collar bush (21) outside is provided with bearing seal cover (1), described bearing seal cover (1) have two annular recess, comprise upper grooves and lower recess, magnetic fluid seal device is provided with in described upper grooves, described magnetic fluid seal device top is provided with pressing plate (12), described magnetic fluid seal device around collar bush (21) place be provided with insulating bush (17), described insulating bush (17) outer cover has magnetic conduction axle sleeve (15), described magnetic conduction axle sleeve (15) and magnetic fluid seal device form magnetic fluid sealing, gapless sealing device is provided with in described lower recess, seal ring (18) is provided with between described insulating bush (17) and collar bush (21), seal ring (23) is provided with between described insulating bush (17) and magnetic conduction axle sleeve (15).
2. a kind of hydraulic turbine generator oil mist sealing structure according to claim 1, it is characterized in that, described magnetic fluid seal device, comprise: pole shoe one (8) and pole shoe two (10) and the some permanent magnets (9) be installed between pole shoe one (8) and pole shoe two (10), in the gap that described magnetic conduction axle sleeve (15) and pole shoe are formed, be full of magnetic liquid (13).
3. a kind of hydraulic turbine generator oil mist sealing structure according to claim 1, it is characterized in that, described gapless sealing device, comprise: primary seal circle (4), described primary seal circle (4) radial direction is provided with radial pad (3), described primary seal circle (4) is axially arranged with axial pad (5), described radial pad (3) and be respectively equipped with horizontal spring (2) and uprighting spring (6) between axial pad (5) and bearing seal cover (1).
4. a kind of hydraulic turbine generator oil mist sealing structure according to claim 3, it is characterized in that, described primary seal circle (4) is split-type structural, and described primary seal circle (4) is made up of four flap seal splits, is provided with buffering connection pad (19) between described every flap seal split.
5. a kind of hydraulic turbine generator oil mist sealing structure according to claim 4, it is characterized in that, described every flap seal split radial direction has pin hole (20), and described pin hole (20) is built with stop pin (7), and described stop pin (7) is fixed on bearing seal cover (1).
6. a kind of hydraulic turbine generator oil mist sealing structure according to claim 5, is characterized in that, is provided with some ring-types and disappears power groove between the surface of contact of the upper and collar bush (21) of described primary seal circle (4).
7. a kind of hydraulic turbine generator oil mist sealing structure according to claim 1, is characterized in that, adopts outer-hexagonal bolts (11) to connect between described pressing plate (12) and bearing seal cover (1).
8. a kind of hydraulic turbine generator oil mist sealing structure according to claim 1, is characterized in that, adopts socket head screw (16) to connect between described magnetic conduction axle sleeve (15) and insulating bush (17).
9. a kind of hydraulic turbine generator oil mist sealing structure according to claim 1, is characterized in that, is provided with abrasion-proof insulating cover (14) between described pressing plate (12) and magnetic conduction axle sleeve (15).
10. a kind of hydraulic turbine generator oil mist sealing structure according to claim 2, is characterized in that, described pole shoe one (8) and pole shoe two (10) are respectively equipped with seal ring (22) and (24) with bearing seal cover (1) in radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056202.7A CN105465374B (en) | 2016-01-28 | 2016-01-28 | A kind of hydrogenerator oil mist sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056202.7A CN105465374B (en) | 2016-01-28 | 2016-01-28 | A kind of hydrogenerator oil mist sealing structure |
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| Publication Number | Publication Date |
|---|---|
| CN105465374A true CN105465374A (en) | 2016-04-06 |
| CN105465374B CN105465374B (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610056202.7A Active CN105465374B (en) | 2016-01-28 | 2016-01-28 | A kind of hydrogenerator oil mist sealing structure |
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| CN (1) | CN105465374B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503269A (en) * | 2020-04-24 | 2020-08-07 | 哈尔滨电机厂有限责任公司 | Hydroelectric set oil groove combination sealing device |
| CN112524164A (en) * | 2020-11-13 | 2021-03-19 | 安徽万宝玻璃有限公司 | Bearing protection mechanism for glass tempering furnace |
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| JPS5530528A (en) * | 1978-08-22 | 1980-03-04 | Matsushita Electric Ind Co Ltd | Bearing device |
| CN2447582Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN1544834A (en) * | 2003-11-18 | 2004-11-10 | 北京交通大学 | Low-temperature large diameter magnetic liquid sealing arrangement |
| CN2935052Y (en) * | 2006-08-10 | 2007-08-15 | 林奇文 | Rotary kiln bidirectional sealing device |
| JP4073064B2 (en) * | 1997-12-02 | 2008-04-09 | 株式会社リガク | Magnetic field resistant magnetic fluid seal device |
| CN203670800U (en) * | 2014-01-17 | 2014-06-25 | 北京交通大学 | Magnetic liquid sealing device for sealing liquid |
| CN205371643U (en) * | 2016-01-28 | 2016-07-06 | 自贡兆强环保科技股份有限公司 | Hydraulic generator oil mist seal structure |
-
2016
- 2016-01-28 CN CN201610056202.7A patent/CN105465374B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5530528A (en) * | 1978-08-22 | 1980-03-04 | Matsushita Electric Ind Co Ltd | Bearing device |
| JP4073064B2 (en) * | 1997-12-02 | 2008-04-09 | 株式会社リガク | Magnetic field resistant magnetic fluid seal device |
| CN2447582Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid seal driving device for vacuum equipment driving shaft |
| CN1544834A (en) * | 2003-11-18 | 2004-11-10 | 北京交通大学 | Low-temperature large diameter magnetic liquid sealing arrangement |
| CN2935052Y (en) * | 2006-08-10 | 2007-08-15 | 林奇文 | Rotary kiln bidirectional sealing device |
| CN203670800U (en) * | 2014-01-17 | 2014-06-25 | 北京交通大学 | Magnetic liquid sealing device for sealing liquid |
| CN205371643U (en) * | 2016-01-28 | 2016-07-06 | 自贡兆强环保科技股份有限公司 | Hydraulic generator oil mist seal structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503269A (en) * | 2020-04-24 | 2020-08-07 | 哈尔滨电机厂有限责任公司 | Hydroelectric set oil groove combination sealing device |
| CN112524164A (en) * | 2020-11-13 | 2021-03-19 | 安徽万宝玻璃有限公司 | Bearing protection mechanism for glass tempering furnace |
| CN112524164B (en) * | 2020-11-13 | 2022-03-29 | 安徽万宝玻璃有限公司 | Bearing protection mechanism for glass tempering furnace |
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| CN105465374B (en) | 2018-03-16 |
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