CN111396230A - Unpowered non-forced self-leveling oil tank integrated floating sealing device - Google Patents
Unpowered non-forced self-leveling oil tank integrated floating sealing device Download PDFInfo
- Publication number
- CN111396230A CN111396230A CN202010226272.9A CN202010226272A CN111396230A CN 111396230 A CN111396230 A CN 111396230A CN 202010226272 A CN202010226272 A CN 202010226272A CN 111396230 A CN111396230 A CN 111396230A
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- Prior art keywords
- ring
- split
- rectangular groove
- oil
- ring surface
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/006—Sealing arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses an unpowered non-forced self-leveling oil tank integrated floating sealing device, which is provided with a seat ring flange, and baffle rings are arranged on the upper ring surface and the lower ring surface of a split seat ring with a closing surface, an upper integrated rectangular groove ring internally provided with 4-16 split floating sealing bodies is fixed on the upper ring surface at the inner side of the baffle ring, 4-16 split floating sealing bodies are arranged in the upper integrated rectangular groove ring, and a lower integrated rectangular groove ring provided with an oil filling hole on the lower ring surface at the inner side of the baffle ring is fixed on the lower ring surface at the inner side of the baffle ring; the air inlet on the vertical ring surface is communicated with an air filter with a flat pressure hole and an air port and an air filter body inside through a connecting pipe and a connecting hose, the flat pressure through hole on the lower ring surface is communicated with a shell with a flat pressure hole, a flat pressure port, a plurality of layers of oil mist filter bodies, a flow guide frame and an oil collecting box through a flat pressure pipe and a connecting hose. The split seat ring is formed into a whole circle by combining the surfaces with the combining bolts, and the whole circle split seat ring is fixed on the oil groove by the combining bolts through the seat ring flange. The invention can be widely applied to the fields of hydraulic generators and the like.
Description
The technical field is as follows:
the invention relates to a device for sealing dynamic and static positions of oil grooves of a thrust bearing and a guide bearing of a hydroelectric generating set.
Background art:
at present, the phenomenon that thrust of a water turbine generator set and turbine oil in each guide bearing oil groove overflow outwards at the position of a dynamic and static sealing gap is serious, particularly the phenomenon that the turbine oil in the thrust bearing oil groove overflows outwards at the position of the dynamic and static sealing gap is serious; secondly, the upper part of the split seat ring on the thrust bearing oil groove is positioned at the center of cooling air of the generator, the cooling air for cooling the stator coil and the rotor coil generates an annular negative pressure area on the surface of the large shaft and the upper ring surface, and the annular negative pressure area generates external suction force on expanded oil mist in the oil groove, so that the phenomenon that the oil mist and oil smoke in the oil groove overflow outwards is intensified; thirdly, the split floating sealing body adopts a dispersed assembly mode at present, so that the sealing performance is extremely poor, and other problems exist. The oil mist overflowing outwards brings harm to the insulation life of a stator and a rotor coil of the generator and pollutes domestic water and ecological environment of people at the downstream. The prior art adopts powered oil mist and smoke purifier for solving the problem, purifies and decompresses oil mist and oil smoke in the oil groove, prevents the oil mist and the oil smoke from overflowing outwards at the dynamic and static sealing positions on the surfaces of the split floating sealing body and the large shaft, and aggravates turbine oil to generate more puffed oil mist because a fan of the oil mist and smoke purifier forcibly absorbs the oil mist and the oil smoke outwards from the oil groove, so that the lubricating and cooling safety oil level of the turbine oil is rapidly reduced, the temperature of a mirror tile is increased, the work load of the oil mist and smoke purifier is increased, and the purification rate is reduced or even the oil mist and smoke purifier fails. The prior art aims to overcome the defect that the annular negative pressure area is generated on the thrust oil groove seat ring by cooling air to cause the vacuum of the annular cavity, air is forcibly filled into the annular cavity, and the filled air is discharged outwards through the dynamic and static gaps of the upper annular surface to generate a high-speed jet effect. The prior art has the defects in the aspects of split floating sealing body processing and installation: the rectangular groove rings are directly machined on the inner diameters (large shaft sides) of the upper ring surface and the lower ring surface of the split seat ring, and hundreds of split floating sealing bodies with springs and positioning waist holes are installed in the double-layer rectangular groove rings one by one. The split floating seal body is a wear part which needs to be replaced frequently, the split floating seal body is difficult to replace in the prior art, dozens of worn split floating seal bodies need to be detached from a rectangular groove of each split seat ring of hundreds of kilograms in a very narrow generator room, dozens of new split floating seal bodies need to be installed in the split seat ring rectangular groove ring, each split seat ring is upper and lower two layers, 4-16 split floating seal bodies need to be installed on each layer, and one integral split seat ring consists of 4-12 segments, so that the split floating seal body is replaced once, the workload is large, the labor intensity is high, the working period is long, and the split floating seal body is damaged frequently, so that the sealing performance is extremely poor. For this reason, there is a great need in the art for a new oil groove sealing device: 1. according to the pressure formed by the expanded oil mist generated by the bearing oil groove and the oil smoke generated by friction, the pressure is communicated with the atmosphere to realize unpowered pressure balance, and the oil mist and the oil smoke are purified; 2. the mode of taking air to the annular cavity against cooling air and forcibly charging air into the annular cavity is cancelled to eliminate the vacuum degree formed in the annular cavity; 3. more importantly, the problems of replacing the split floating sealing body are solved by adopting a better scheme, and the defects of the prior art must be overcome by the device related to the novel technology.
The invention content is as follows:
the invention aims to provide a technical scheme for overcoming all defects in the prior art, the technical scheme disclosed by the invention is a structural technical scheme of adopting unpowered automatic oil mist discharge, non-forced air filling into a ring cavity to eliminate vacuum in the ring cavity and applying integrated floating seal, and the device related to the technical scheme is mainly and technically characterized in that: an upper integrated rectangular groove ring is formed by a rectangular groove upper ring, a rectangular groove lower ring and a fixed hole, the number of the upper integrated rectangular groove ring is the same as the number of split parts of a split seat ring, a lower integrated rectangular groove ring is formed by a rectangular groove upper ring, a rectangular groove lower ring with a plurality of oil injection holes and a fixed hole, the number of the lower integrated rectangular groove ring is the same as the number of split parts of the split seat ring, 4-8 split floating sealing bodies with pre-tightening springs fixed on the backs and positioning waist holes arranged on the split floating sealing bodies are respectively arranged in the upper integrated rectangular groove ring and the lower integrated rectangular groove ring, and 4-8 split floating sealing bodies can be fixedly connected in the upper integrated rectangular groove ring and the lower integrated rectangular groove ring in a front-back floating mode through the positioning waist holes by positioning screws; a retaining ring is processed at the front ends of the upper split ring surface and the lower split ring surface, a plurality of fixing screw holes are uniformly and radially processed on the upper ring surface and the lower ring surface on the inner side of the retaining ring, fixing bolts penetrate through the fixing holes and fix upper integrated rectangular groove rings with the same split number as that of the split seat ring on the upper ring surface on the inner side of the retaining ring through the fixing screw holes, and fixing bolts penetrate through the fixing holes and fix lower integrated rectangular groove rings with the same split number as that of the split seat ring on the lower ring surface on the inner side of the retaining ring through the fixing screw holes; an air inlet hole is formed in the split vertical ring surface, one end of the connecting pipe is communicated with the air inlet hole through a connecting pipe flange by using a fixing bolt, the other end of the connecting pipe is communicated with the air filter through a flat pressing hole in the shell through a connecting hose, and an air filter body and an air opening are formed in the air filter; the split lower ring surface outside the vertical ring surface is provided with a flat pressing through hole, one end of the flat pressing pipe is fixed on the flat pressing through hole through a connecting pipe flange by a fixing bolt, the other end of the flat pressing pipe is communicated with the shell through a flat pressing hole by a connecting hose, the upper end of the shell is provided with a flat pressing port, the upper end inside the shell is provided with a plurality of layers of oil mist filter bodies, a flow guide frame is arranged below the oil mist filter bodies, the bottom of the shell is provided with an oil collecting box, a split seat ring is combined into a whole circle through a combining bolt by a combining surface, the whole circle of the split seat ring combination is fixed on an oil groove through a combining bolt by a seat ring flange, baffle rings on the upper ring surface and the lower ring surface have positioning function and high processing precision, the upper integrated rectangular groove ring and the lower integrated rectangular groove ring and the large axial degree are mainly ensured, so that the split sealing bodies integrated in the upper integrated rectangular groove ring and the lower rectangular groove ring have good floating and large axial degree, and the, so that sealed effect is better, the circle bores under the rectangular groove of integrated rectangular groove ring down has a plurality of oil filler points, and turbine oil in the oil groove constantly passes through the lubricated split floating seal body of oil filler point with oil mist mode. The air filter body in the air filter has extremely low filtering resistance, the feeding of clean air into the annular cavity is not influenced, and the proper amount of air is fed into the annular cavity through the air flow passing device when the cooling air generates vacuum in the annular cavity. The oil mist filter body has small filtering resistance, does not influence the pressure generated by the oil groove by releasing the oil mist filter body into the atmosphere and expanding, and realizes the automatic balance of the internal pressure of the oil groove, thereby reducing the sealing pressure of the lower split floating sealing body at the static and dynamic positions.
The technical effect achieved by the technical scheme provided by the invention is realized as follows: the split floating sealing structure is characterized in that 4-16 split floating sealing bodies are respectively arranged in an upper integrated rectangular groove ring and a lower integrated rectangular groove ring which are equal to the split number of a split seat ring through positioning screws in a large space outside a generator room, the upper integrated rectangular groove ring and the lower integrated rectangular groove ring are light in weight and small in overall dimension, and then the original upper integrated rectangular groove ring and the original lower integrated rectangular groove ring of the split floating sealing bodies with 4-16 abrasion parts are detached and replaced with new ones. Need not adjust the concentricity when installing new upper and lower integrated rectangular groove ring, demolish and install very simple and conveniently, working strength is little, and the change time is short, and this technical scheme has overcome prior art and has changed the defect of split floating seal: firstly, hundreds of kilograms of split seat rings do not need to be carried, and dozens of positioning screws do not need to be disassembled and assembled in a narrow space, wherein the number of the positioning screws is twice that of the split floating sealing body; the split seat ring of hundreds of kilograms is carried to the outside of the generator room in the prior art scheme, and the split seat ring is carried into the generator room after being replaced, so the split floating sealing body replaced by the prior art scheme has the defects of high working strength, tedious replacement, long replacement time, easy damage of the split floating sealing body and the like. When the cooling air generates vacuum degree in the ring cavity, the vacuum degree can automatically supplement the air in the outside atmosphere to the ring cavity through the air inlet, the connecting pipe, the connecting hose and the air filter, the vacuum degree in the ring cavity is eliminated with a proper amount of air, the vacuum degree in the ring cavity can be eliminated by the air filled according to the actual condition of the vacuum degree, the air pressure in the ring cavity can be ensured to be basically consistent with the atmospheric pressure without generating jet effect, and the scheme is completely superior to the scheme of filling the air into the ring cavity in a forced mode in the prior art. The pressure generated by the expanded oil mist and the oil smoke in the oil groove can be discharged through the flat pressing through hole, the flat pressing pipe, the connecting hose, the flat pressing hole and the oil mist filter body through the flat pressing port, the filtering resistance of the oil mist filter body is small, so that the technical requirement of pressure balance inside and outside the oil groove is met, the sealing pressure at the dynamic and static sealing position between the lower-layer valving floating sealing body and the large shaft is automatically reduced, and the weak filtering resistance generated by the oil mist filter body has a certain inhibiting effect on the generation of the expanded oil mist; unlike the prior art in which the fan is used to suck oil mist outwards, the oil groove is provided with a negative pressure, which causes the oil mist to be generated, so that the turbine oil is large in loss, the oil level is reduced rapidly, and the emergency shutdown accident is caused to happen frequently. Therefore, the technical characteristics of the self-leveling pressure provided by the technical scheme are superior to those of the prior art, and the turbine oil filtered by the oil mist filter forms a liquid state and flows into the oil collecting box through the flow guide frame under the action of gravity. In the technical scheme, a plurality of air inlet holes, an air filter and a plurality of oil groove flat pressing devices which are composed of a shell, an oil mist filter body, a flow guide frame and an oil collecting box are adopted and are determined according to the size of an oil groove and the rotating speed of a generator.
The invention has simple and ingenious structure, the adopted method accords with the running condition of the generator, and compared with the prior art, the invention has novelty, creativity and practicability and must be widely applied to the fields of water turbine generator sets, turbonators and the like.
Description of the drawings:
FIG. 1 is a front view of an unpowered non-forced self-leveling oil tank integrated floating sealing device
FIG. 2 is a top view of an unpowered non-forced self-leveling oil tank integrated floating seal device
FIG. 3 is a view of the unpowered non-forced self-leveling oil tank integrated floating seal device A
FIG. 4 is a B-B view of an unpowered non-forced self-leveling oil tank integrated floating sealing device
Wherein:
1. air port 2, air filter 3, casing
4. Air filter 5, connecting hose 6, connecting pipe
7. Fixing bolt 8, connecting pipe flange 9 and vertical ring surface
10. Upper ring surface 11, baffle ring 12, upper integrated rectangular groove ring
13. Pre-tightening spring 14, rectangular groove upper ring 15 and positioning screw
16. Split floating sealing body 17, large shaft 18 and ring cavity
19. Lower ring surface 20, flat pressing pipe 21 and flat pressing port
22. Oil mist filter 23, flow guide frame 24 and oil collecting box
25. Flat pressing hole 26, handle bolt 27, seat ring flange
28. Oil groove 29, turbine oil 30 and flat pressure through hole
31. Mirror tile 32, mirror plate 33, positioning waist hole
34. Rectangular groove lower ring 35, fixing screw hole 36 and lower integrated rectangular groove ring
37. Fixing hole 38, air inlet hole 39 and oil filling hole
40. Split seat ring 41, handle joint surface
The specific implementation mode is as follows:
a baffle ring 11 is processed on the inner diameter side of an upper ring surface 10 and a lower ring surface 19 on a split ring 40 with a ring flange 27 and a combining surface 41, an air inlet hole 38 is processed on a vertical ring surface 9, a flat pressing through hole 30 is processed on a lower ring surface 19 on the outer side of the vertical ring surface 9, an upper integrated rectangular groove ring 12 is formed by a rectangular groove upper ring 14, a rectangular groove lower ring 34 and a fixing hole 37, a lower integrated rectangular groove ring 36 is formed by a rectangular groove upper ring 14, a rectangular groove lower ring 34 with a plurality of oil injection holes 39 and a fixing hole 37, 4-16 split floating sealing bodies 16 with the back parts fixed with pre-tightening springs 13 and the positioning waist holes 33 are respectively arranged in the upper integrated rectangular groove ring 12 and the lower integrated rectangular groove ring 36, the split floating sealing bodies 16 are fixed in the upper integrated rectangular groove ring 12 and the lower integrated rectangular groove ring 36 in a floating manner by positioning screws through the positioning waist holes 33, the upper integrated rectangular groove ring 12 and the lower integrated rectangular groove ring 11 are fixed by fixing bolts 7, the lower integrated rectangular groove ring 36 is fixed inside the retainer ring 11 of the lower ring surface 19 by fixing bolts 7 through fixing holes 37. One end of a connecting pipe 6 is fixed outside the air inlet hole 38 by a fixing bolt 7 through a connecting pipe flange 8, and the other end of the connecting pipe 6 is communicated with an air filter 2 which is provided with a flat pressure hole 25 on the shell 3 and an air port 1 on the front and is internally provided with an air filter body 4 through a connecting hose 5. One end of the flat pressing pipe 20 is fixed on the flat pressing through hole 30 through a connecting pipe flange 8 by a fixing bolt 7, the other end of the flat pressing pipe 20 is communicated with a connecting hose 5, and the connecting hose 5 is connected with a shell 3 which is provided with a flat pressing opening 21, a multi-layer oil mist filter body 22 arranged at the upper end of the inner part, a flow guide frame 23 fixed in the middle and an oil collecting box 24 arranged below through a flat pressing hole 25. A plurality of split seat rings 40 are placed on the oil groove 28 of the large shaft 17, the split seat rings 40 are combined into a whole circle through combining surfaces 41 by using combining bolts 26, and the whole circle split seat ring 40 is fixed on the oil groove 28 through a seat ring flange 27 by using the combining bolts 26. And (5) finishing the implementation.
Claims (1)
1. The integrated floating sealing device for unpowered non-forced self-leveling oil tank is characterized by that it has a split seat ring formed from split upper ring surface, split vertical ring surface, split lower ring surface and seat ring flange, and has several split floating sealing bodies with positioning waist holes on the back fixed pre-tightening spring, and is characterized by that it has an upper integrated rectangular groove ring formed from rectangular groove upper ring, rectangular groove lower ring and fixing hole, and the number of upper integrated rectangular groove ring is identical to that of split seat ring, and its lower integrated rectangular groove ring is formed from rectangular groove upper ring, rectangular groove lower ring with several oil-filling holes and fixing hole, and its lower integrated rectangular groove ring number is identical to that of split seat ring, and 4-8 split floating sealing bodies with pre-tightening springs fixed on the back and positioning waist holes are respectively placed in the upper integrated rectangular groove ring and lower integrated rectangular groove ring, and the positioning screws are used to fixedly connect 4-8 split floating sealing bodies in the upper integrated rectangular groove ring and lower integrated rectangular groove ring in the mode of floating mode A rectangular groove ring; a retaining ring is processed at the front ends of the upper split ring surface and the lower split ring surface, a plurality of fixing screw holes are uniformly and radially processed on the upper ring surface and the lower ring surface on the inner side of the retaining ring, fixing bolts penetrate through the fixing holes and fix upper integrated rectangular groove rings with the same split number as that of the split seat ring on the upper ring surface on the inner side of the retaining ring through the fixing screw holes, and fixing bolts penetrate through the fixing holes and fix lower integrated rectangular groove rings with the same split number as that of the split seat ring on the lower ring surface on the inner side of the retaining ring through the fixing screw holes; an air inlet hole is formed in the split vertical ring surface, one end of the connecting pipe is communicated with the air inlet hole through a connecting pipe flange by using a fixing bolt, the other end of the connecting pipe is communicated with the air filter through a flat pressing hole in the shell through a connecting hose, and an air filter body and an air opening are formed in the air filter; the split lower ring surface on the outer side of the vertical ring surface is provided with a flat pressing through hole, one end of a flat pressing pipe is fixed on the flat pressing through hole through a fixing bolt by a connecting pipe flange, the other end of the flat pressing pipe is communicated with the shell through a flat pressing hole by a connecting hose, the upper end of the shell is provided with a flat pressing port, the upper end inside the shell is provided with a plurality of layers of oil mist filter bodies, a flow guide frame is arranged below the oil mist filter bodies, the bottom of the shell is provided with an oil collecting box, a split seat ring is combined into a whole circle by a combining bolt through a combining surface, and the whole circle of the split seat ring combination is fixed on an oil groove by the combining bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226272.9A CN111396230A (en) | 2020-03-20 | 2020-03-20 | Unpowered non-forced self-leveling oil tank integrated floating sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226272.9A CN111396230A (en) | 2020-03-20 | 2020-03-20 | Unpowered non-forced self-leveling oil tank integrated floating sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111396230A true CN111396230A (en) | 2020-07-10 |
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ID=71436953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010226272.9A Pending CN111396230A (en) | 2020-03-20 | 2020-03-20 | Unpowered non-forced self-leveling oil tank integrated floating sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111396230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047999A (en) * | 2021-04-19 | 2021-06-29 | 哈尔滨电机厂有限责任公司 | Axial sealing device for oil groove of hydroelectric generating set |
-
2020
- 2020-03-20 CN CN202010226272.9A patent/CN111396230A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047999A (en) * | 2021-04-19 | 2021-06-29 | 哈尔滨电机厂有限责任公司 | Axial sealing device for oil groove of hydroelectric generating set |
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