CN111365459A - Combined sealing device for bearing oil groove of vertical hydro-generator - Google Patents
Combined sealing device for bearing oil groove of vertical hydro-generator Download PDFInfo
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- CN111365459A CN111365459A CN202010157243.1A CN202010157243A CN111365459A CN 111365459 A CN111365459 A CN 111365459A CN 202010157243 A CN202010157243 A CN 202010157243A CN 111365459 A CN111365459 A CN 111365459A
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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
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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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- 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
- F03B11/06—Bearing arrangements
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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
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention discloses a combined sealing device for a bearing oil groove of a vertical hydraulic generator, belonging to the sealing field of hydraulic generators, comprising an oil groove, a rotating shaft and a sealing end cover, and being characterized in that: the sealing seat ring I is provided with a first cavity and a second cavity, the first sealing seat ring I and the rotating shaft form a third cavity, a fourth cavity is formed between the rotating shaft and the first sealing seat ring I, the first sealing brush is in contact with the rotating shaft, the first cavity is used for introducing high-pressure air, and the second cavity is used for introducing normal-pressure air. According to the oil mist sealing structure, the oil mist is matched with jet gas with opposite oil mist overflowing directions through the plurality of cavities with good sealing performance from the inside of the oil groove to the outside of the oil groove, and the multi-layer sealing tooth structure is combined, so that the oil mist can be effectively sealed, the oil mist is prevented from leaking, and the oil mist sealing effect is greatly improved.
Description
Technical Field
The invention relates to the technical field of sealing of hydraulic generators, in particular to a combined sealing device for a bearing oil groove of a vertical hydraulic generator.
Background
The generator bearing generally adopts a sliding bearing, and a bearing bush is soaked in lubricating oil or the lubricating oil is sprayed on a sliding surface through an oil spraying device to provide lubrication for the bearing. As the unit rotates, oil mist will form, which generally occurs more at higher rotational speeds. During the operation of the unit, oil mist is accumulated continuously, the concentration of the oil mist and the gas pressure in the oil groove are increased, and the oil mist overflows from the sealing structure. The overflowed oil mist pollutes the generator and the environment, and in a serious case, a series of problems of reduction of the insulation performance and reduction of the efficiency of the air cooler can be caused, so that the reliability of the generator is reduced.
The prior vertical hydraulic generator bearing oil groove sealing device mainly has several types of forms: one type is non-contact comb tooth sealing, the leakage amount is large, oil mist is contained in leaked substances, and the oil mist can be condensed in a stator-rotor air duct in the long-term operation process to influence the safe operation of a generator; one type is contact sealing, a sealing friction pair is generally made of high polymer materials, the sealing effect of the sealing friction pair is superior to that of non-contact comb sealing, but the friction pair is very seriously abraded in the operation process, and sometimes the problems that a sliding rotor loses heat shrink amount due to heat generation caused by friction and the shaft throw is increased are caused; the other type is air seal, the sealing cover is generally provided with two layers or multiple layers of annular grooves which form two layers of cavities with the surface of the shaft, multiple layers of comb tooth seals are arranged between the cavities along the axial direction, air is introduced into one layer of cavity, an oil mist suction machine is arranged to suck air from the other cavity, and the gap between the shaft and the sealing cover is sealed by utilizing the air.
Chinese patent publication No. CN 205780892U, published 2016, 12, month, and 07, discloses a vertical hydro-generator sealing device, which includes an oil tank and a sealing cover, and is characterized in that: the sealing cover is provided with an air inlet cavity and an air exhaust cavity, the air inlet cavity is composed of an air inlet pressure equalizing cavity and an air inlet throttling channel, the air exhaust cavity is composed of an air exhaust pressure equalizing cavity and an air exhaust throttling channel, and the outer walls of the air inlet cavity and the air exhaust cavity are both connected with sealing teeth.
The sealing device for the vertical hydraulic generator disclosed in the patent document adopts a composite cavity structure, and gas is introduced into a gas inlet pressure equalizing cavity of a gas inlet cavity and then forms gas jet flow through a gas inlet throttling channel communicated with the gas inlet pressure equalizing cavity to be matched with sealing teeth, so that oil mist is prevented from leaking. However, the sealing effect is not good enough, and the oil mist is still easy to leak.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a combined sealing device for a bearing oil groove of a vertical hydro-generator.
The invention is realized by the following technical scheme:
the utility model provides a vertical hydraulic generator bearing oil groove combination sealing device, includes oil groove, rotation axis and end cover, its characterized in that: the sealing device also comprises a first sealing seat ring and a second sealing seat ring, one side of the sealing end cover is connected with the lower end of the first sealing seat ring, the other side of the sealing end cover is fixedly connected with the oil groove, the upper end of the first sealing seat ring is connected with the lower end of the second sealing seat ring, the upper end of the second sealing seat ring is connected with a first sealing brush, the first sealing seat ring is connected with a second sealing brush and a plurality of layers of sealing teeth, the first sealing seat ring is provided with a first cavity and a second cavity, the sealing seat ring II, the sealing seat ring I and the rotating shaft form a cavity III, a cavity IV is formed between the rotating shaft and the sealing seat ring I, the cavity I is communicated with the cavity IV through an air inlet channel, the sealing end cover is connected with an exhaust pipe, the exhaust pipe is communicated with the oil groove, the first cavity is connected with a first air inlet pipe penetrating through the first sealing seat ring, and the second cavity is connected with a second air inlet pipe penetrating through the first sealing seat ring.
The multilayer sealing teeth comprise first layer sealing teeth, second layer sealing teeth and third layer sealing teeth, the first layer sealing teeth, the second layer sealing teeth and the third layer sealing teeth are sequentially arranged on the first sealing seat ring from top to bottom, and the second sealing brush is located above the first layer sealing teeth.
The clearance between the first layer of sealing teeth and the rotating shaft is smaller than the clearance between the second layer of sealing teeth and the rotating shaft, and the clearance between the second layer of sealing teeth and the rotating shaft is smaller than the clearance between the third layer of sealing teeth and the rotating shaft.
The second sealing seat ring is a radial adjustable seat ring, and a first sealing brush on the second sealing seat ring is in contact with the rotating shaft.
The axial height of the air inlet channel is 0.5-100mm, and the ratio of the axial height of the air inlet channel to the axial height of the first cavity is 0.01-1.
The first sealing seat ring and the first sealing end cover are of an integrally formed structure, and the first cavity, the second cavity and the third cavity are communicated in the circumferential direction.
The first cavity is used for introducing high-pressure air, and the second cavity is used for introducing normal-pressure air.
The working principle of the invention is as follows:
when the oil mist suction device is used, a high-pressure fan is adopted or high-pressure air is taken from a wind shield of the generator through a pipeline to ventilate the first cavity, and the air suction pipe is connected with the oil mist suction machine to suck oil mist out of the oil groove. High-pressure gas enters a first cavity through a first air inlet pipe, the first cavity and the second cavity have the same pressure equalizing effect, the high-pressure gas in the first cavity enters a fourth cavity through an air inlet channel, uniform and continuous jet gas which overflows in the opposite direction to oil mist is formed, the normal-pressure gas enters a second cavity through a second air inlet pipe, the normal-pressure gas in the second cavity plays a gas supplementing effect, the gas in the fourth cavity passes through a plurality of layers of sealing teeth to reach a second sealing brush, the gas enters gaps between the bristles to form turbulence, the first cavity has good self-sealing performance, the fourth cavity can be communicated with an oil groove through the plurality of layers of sealing teeth, the direction of the high-pressure jet gas is kept in the direction opposite to the oil mist overflowing direction all the time, the first sealing seat ring, the second cavity forms a third cavity with a rotating shaft, and the sealing.
The beneficial effects of the invention are mainly shown in the following aspects:
one side of a sealing end cover is connected with the lower end of a sealing seat ring I, the other side of the sealing end cover is fixedly connected with an oil groove, the upper end of the sealing seat ring I is connected with the lower end of a sealing seat ring II, the upper end of the sealing seat ring II is connected with a first sealing hairbrush, the sealing seat ring I is connected with a second sealing hairbrush and multiple layers of sealing teeth, the sealing seat ring I is provided with a cavity I and a cavity II, the sealing seat ring I and a rotating shaft form a cavity III, a cavity IV is formed between the rotating shaft and the sealing seat ring I, the cavity I is communicated with the cavity IV through an air inlet channel, the sealing end cover is connected with an exhaust pipe, the exhaust pipe is communicated with the oil groove, the cavity I is connected with an air inlet pipe I penetrating through the sealing seat ring I, the cavity II is connected with an air inlet pipe II penetrating through the sealing, the gas enters gaps among the bristles to form turbulence, and the cavity IV is good in self-sealing performance, so that the cavity IV can be communicated with the oil groove only through multiple layers of sealing teeth, the direction of the high-pressure jet gas is always kept in the direction opposite to the overflow direction of the oil mist, and the sealing seat ring I, the sealing seat ring II and the rotating shaft form a cavity III with good sealing performance, so that the sealing performance of the bristle side of the cavity IV is further improved; as a whole, than prior art, the oil mist must spill over the gaseous cooperation of the efflux of opposite direction through a plurality of good cavitys of leakproofness and oil mist from the oil groove to the oil groove outside, combines the sealed tooth structure of multilayer to can effectively seal the oil mist, prevent that the oil mist from leaking, very big promotion the sealed effect of oil mist.
Secondly, the multilayer sealing teeth comprise a first layer of sealing teeth, a second layer of sealing teeth and a third layer of sealing teeth, the first layer of sealing teeth, the second layer of sealing teeth and the third layer of sealing teeth are sequentially arranged on the first sealing seat ring from top to bottom, the second sealing brush is positioned above the first layer of sealing teeth, the structure that the multilayer sealing teeth are matched with the second sealing brush is adopted, gas in the cavity IV passes through the multilayer sealing teeth to reach the second sealing brush, the gas enters gaps among the brush hairs to form turbulence, the good self-sealing performance is achieved, the cavity IV can be communicated with the oil groove only through the multilayer sealing teeth, the direction of high-pressure jet gas is always kept in the direction opposite to the oil mist overflowing direction, and the oil mist sealing effect is greatly guaranteed.
Third, in the invention, the clearance between the first layer of seal teeth and the rotating shaft is smaller than the clearance between the second layer of seal teeth and the rotating shaft, the clearance between the second layer of seal teeth and the rotating shaft is smaller than the clearance between the third layer of seal teeth and the rotating shaft, the specific clearance which is enlarged in sequence is used for keeping the gas direction in the cavity IV in the direction opposite to the oil mist overflow direction, and the plurality of layers of seal teeth have good following performance, thereby effectively avoiding the collision between a rotating part and a static part when the swing of the rotating shaft is overlarge.
And fourthly, the second sealing seat ring is a radial adjustable seat ring, and the first sealing hairbrush on the second sealing seat ring is in contact with the rotating shaft, so that the flexibility is strong, and the sealing effect can be further improved.
Fifth, the axial height of the air inlet channel is 0.5-100mm, the ratio of the axial height of the air inlet channel to the axial height of the first cavity is 0.01-1, so that high-pressure gas in the first cavity enters the fourth cavity through the air inlet channel, and uniform and continuous jet gas opposite to the overflow direction of oil mist can be better formed.
Sixth, the seal seat ring I and the seal end cover are of an integrally formed structure, and the cavity I, the cavity II and the cavity III are communicated in the circumferential direction, so that the overall structural strength can be improved, and the sealing effect can be guaranteed.
And seventhly, the first cavity is used for introducing high-pressure air, the second cavity is used for introducing normal-pressure air, the high-pressure gas enters the first cavity through the first air inlet pipe, the first cavity and the second cavity share the pressure equalizing effect, the high-pressure gas in the first cavity in the subsequent process can conveniently enter the fourth cavity, jet gas which is uniform and continuous and is opposite to the overflow direction of the oil mist is formed, and the normal-pressure gas in the second cavity can play a role in supplementing air.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, in which:
FIG. 1 is a schematic structural view of the present invention;
the labels in the figure are: 1. the sealing device comprises oil grooves, 2, a rotating shaft, 3, a sealing end cover, 4, first sealing seat rings, 5, second sealing seat rings, 6, a first sealing brush, 7, a second sealing brush, 8, a first cavity, 9, a second cavity, 10, a third cavity, 11, a fourth cavity, 12, an air inlet channel, 13, an air exhaust pipe, 14, a first air inlet pipe, 15, a second air inlet pipe, 16, first layer sealing teeth, 17, second layer sealing teeth, 18 and third layer sealing teeth.
Detailed Description
Example 1
Referring to fig. 1, a vertical hydro-generator bearing oil groove combined sealing device comprises an oil groove 1, a rotating shaft 2, a sealing end cover 3, a first sealing seat ring 4 and a second sealing seat ring 5, wherein one side of the sealing end cover 3 is connected with the lower end of the first sealing seat ring 4, the other side of the sealing end cover 3 is fixedly connected with the oil groove 1, the upper end of the first sealing seat ring 4 is connected with the lower end of the second sealing seat ring 5, the upper end of the second sealing seat ring 5 is connected with a first sealing brush 6, the first sealing seat ring 4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the first sealing seat ring 4 is provided with a first cavity 8 and a second cavity 9, the second sealing seat ring 5, the first sealing seat ring 4 and the rotating shaft 2 form a third cavity 10, a fourth cavity 11 is formed between the rotating shaft 2 and the first sealing seat ring 4, and the first cavity 8, the sealing end cover 3 is connected with an exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, a first air inlet pipe 14 penetrating through the first sealing seat ring 4 is connected to the first cavity 8, and a second air inlet pipe 15 penetrating through the first sealing seat ring 4 is connected to the second cavity 9.
The embodiment is the most basic implementation mode, one side of a sealing end cover 3 is connected with the lower end of a sealing seat ring I4, the other side of the sealing end cover 3 is fixedly connected with an oil groove 1, the upper end of the sealing seat ring I4 is connected with the lower end of a sealing seat ring II 5, the upper end of the sealing seat ring II 5 is connected with a first sealing brush 6, the sealing seat ring I4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, a cavity I8 and a cavity II 9 are arranged on the sealing seat ring I4, the sealing seat ring II 5, the sealing seat ring I4 and a rotating shaft 2 form a cavity III 10, a cavity IV 11 is formed between the rotating shaft 2 and the sealing seat ring I4, the cavity I8 is communicated with the cavity IV 11 through an air inlet channel 12, an air exhaust pipe 13 is connected on the sealing end cover 3, the exhaust pipe 13 is communicated with the oil groove 1, an air inlet pipe I14 penetrating through the sealing seat, when the oil mist spraying device is used, gas in the cavity IV 11 passes through the plurality of layers of sealing teeth to reach the second sealing brush 7, the gas enters gaps among the brush hairs to form turbulence, the oil mist spraying device has good self-sealing performance, the cavity IV 11 can be communicated with the oil groove 1 only through the plurality of layers of sealing teeth, the direction of high-pressure jet gas is kept in the direction opposite to the oil mist overflowing direction all the time, the sealing seat ring I4, the sealing seat ring II 5 and the rotating shaft 2 form a cavity III 10 with good sealing performance, and the sealing performance of the brush hair side of the cavity IV 11 is further improved; as a whole, than prior art, the oil mist must spill over the gaseous cooperation of efflux opposite in direction with the oil mist through the good cavity of a plurality of leakproofness from oil groove 1 to oil groove 1 outward, combines the sealed tooth structure of multilayer to can effectively seal the oil mist, prevent that the oil mist from leaking, very big promotion the sealed effect of oil mist.
Example 2
Referring to fig. 1, a vertical hydro-generator bearing oil groove combined sealing device comprises an oil groove 1, a rotating shaft 2, a sealing end cover 3, a first sealing seat ring 4 and a second sealing seat ring 5, wherein one side of the sealing end cover 3 is connected with the lower end of the first sealing seat ring 4, the other side of the sealing end cover 3 is fixedly connected with the oil groove 1, the upper end of the first sealing seat ring 4 is connected with the lower end of the second sealing seat ring 5, the upper end of the second sealing seat ring 5 is connected with a first sealing brush 6, the first sealing seat ring 4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the first sealing seat ring 4 is provided with a first cavity 8 and a second cavity 9, the second sealing seat ring 5, the first sealing seat ring 4 and the rotating shaft 2 form a third cavity 10, a fourth cavity 11 is formed between the rotating shaft 2 and the first sealing seat ring 4, and the first cavity 8, the sealing end cover 3 is connected with an exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, a first air inlet pipe 14 penetrating through the first sealing seat ring 4 is connected to the first cavity 8, and a second air inlet pipe 15 penetrating through the first sealing seat ring 4 is connected to the second cavity 9.
The multi-layer sealing teeth comprise a first layer of sealing teeth 16, a second layer of sealing teeth 17 and a third layer of sealing teeth 18, the first layer of sealing teeth 16, the second layer of sealing teeth 17 and the third layer of sealing teeth 18 are sequentially arranged on the first sealing seat ring 4 from top to bottom, and the second sealing brush 7 is located above the first layer of sealing teeth 16.
The embodiment is a better implementation mode, the multilayer seal teeth comprise a first layer of seal teeth 16, a second layer of seal teeth 17 and a third layer of seal teeth 18, the first layer of seal teeth 16, the second layer of seal teeth 17 and the third layer of seal teeth 18 are sequentially arranged on the first seal seat ring 4 from top to bottom, the second seal brush 7 is positioned above the first layer of seal teeth 16, the structure that the multilayer seal teeth are matched with the second seal brush 7 is adopted, gas in the cavity fourth 11 passes through the multilayer seal teeth to reach the second seal brush 7, the gas enters gaps among the brush hairs to form turbulence, the good self-sealing performance is achieved, the cavity fourth 11 can only be communicated with the oil groove 1 through the multilayer seal teeth, the direction of the high-pressure jet gas is always kept in the direction opposite to the oil mist overflowing direction, and the oil mist sealing effect is greatly guaranteed.
Example 3
Referring to fig. 1, a vertical hydro-generator bearing oil groove combined sealing device comprises an oil groove 1, a rotating shaft 2, a sealing end cover 3, a first sealing seat ring 4 and a second sealing seat ring 5, wherein one side of the sealing end cover 3 is connected with the lower end of the first sealing seat ring 4, the other side of the sealing end cover 3 is fixedly connected with the oil groove 1, the upper end of the first sealing seat ring 4 is connected with the lower end of the second sealing seat ring 5, the upper end of the second sealing seat ring 5 is connected with a first sealing brush 6, the first sealing seat ring 4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the first sealing seat ring 4 is provided with a first cavity 8 and a second cavity 9, the second sealing seat ring 5, the first sealing seat ring 4 and the rotating shaft 2 form a third cavity 10, a fourth cavity 11 is formed between the rotating shaft 2 and the first sealing seat ring 4, and the first cavity 8, the sealing end cover 3 is connected with an exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, a first air inlet pipe 14 penetrating through the first sealing seat ring 4 is connected to the first cavity 8, and a second air inlet pipe 15 penetrating through the first sealing seat ring 4 is connected to the second cavity 9.
The multi-layer sealing teeth comprise a first layer of sealing teeth 16, a second layer of sealing teeth 17 and a third layer of sealing teeth 18, the first layer of sealing teeth 16, the second layer of sealing teeth 17 and the third layer of sealing teeth 18 are sequentially arranged on the first sealing seat ring 4 from top to bottom, and the second sealing brush 7 is located above the first layer of sealing teeth 16.
The clearance between the first layer of seal teeth 16 and the rotating shaft 2 is smaller than the clearance between the second layer of seal teeth 17 and the rotating shaft 2, and the clearance between the second layer of seal teeth 17 and the rotating shaft 2 is smaller than the clearance between the third layer of seal teeth 18 and the rotating shaft 2.
In this embodiment, the gap between the first layer of seal teeth 16 and the rotating shaft 2 is smaller than the gap between the second layer of seal teeth 17 and the rotating shaft 2, the gap between the second layer of seal teeth 17 and the rotating shaft 2 is smaller than the gap between the third layer of seal teeth 18 and the rotating shaft 2, the specific gaps that are sequentially increased are used for keeping the gas direction in the cavity four 11 in the direction opposite to the oil mist overflowing direction, and the multiple layers of seal teeth have good following performance, so that the collision between the rotating component and the stationary component when the rotating shaft 2 has an excessively large swing can be effectively avoided.
Example 4
Referring to fig. 1, a vertical hydro-generator bearing oil groove combined sealing device comprises an oil groove 1, a rotating shaft 2, a sealing end cover 3, a first sealing seat ring 4 and a second sealing seat ring 5, wherein one side of the sealing end cover 3 is connected with the lower end of the first sealing seat ring 4, the other side of the sealing end cover 3 is fixedly connected with the oil groove 1, the upper end of the first sealing seat ring 4 is connected with the lower end of the second sealing seat ring 5, the upper end of the second sealing seat ring 5 is connected with a first sealing brush 6, the first sealing seat ring 4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the first sealing seat ring 4 is provided with a first cavity 8 and a second cavity 9, the second sealing seat ring 5, the first sealing seat ring 4 and the rotating shaft 2 form a third cavity 10, a fourth cavity 11 is formed between the rotating shaft 2 and the first sealing seat ring 4, and the first cavity 8, the sealing end cover 3 is connected with an exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, a first air inlet pipe 14 penetrating through the first sealing seat ring 4 is connected to the first cavity 8, and a second air inlet pipe 15 penetrating through the first sealing seat ring 4 is connected to the second cavity 9.
The multi-layer sealing teeth comprise a first layer of sealing teeth 16, a second layer of sealing teeth 17 and a third layer of sealing teeth 18, the first layer of sealing teeth 16, the second layer of sealing teeth 17 and the third layer of sealing teeth 18 are sequentially arranged on the first sealing seat ring 4 from top to bottom, and the second sealing brush 7 is located above the first layer of sealing teeth 16.
The clearance between the first layer of seal teeth 16 and the rotating shaft 2 is smaller than the clearance between the second layer of seal teeth 17 and the rotating shaft 2, and the clearance between the second layer of seal teeth 17 and the rotating shaft 2 is smaller than the clearance between the third layer of seal teeth 18 and the rotating shaft 2.
The second sealing seat ring 5 is a radial adjustable seat ring, and a first sealing brush 6 on the second sealing seat ring 5 is in contact with the rotating shaft 2.
The axial height of the air inlet channel 12 is 0.5mm, and the ratio of the axial height of the air inlet channel 12 to the axial height of the first cavity 8 is 0.01.
In another preferred embodiment, the second sealing ring 5 is a radially adjustable ring, and the first sealing brush 6 on the second sealing ring 5 is in contact with the rotating shaft 2, so that the flexibility is strong, and the sealing effect can be further improved.
Example 5
Referring to fig. 1, a vertical hydro-generator bearing oil groove combined sealing device comprises an oil groove 1, a rotating shaft 2, a sealing end cover 3, a first sealing seat ring 4 and a second sealing seat ring 5, wherein one side of the sealing end cover 3 is connected with the lower end of the first sealing seat ring 4, the other side of the sealing end cover 3 is fixedly connected with the oil groove 1, the upper end of the first sealing seat ring 4 is connected with the lower end of the second sealing seat ring 5, the upper end of the second sealing seat ring 5 is connected with a first sealing brush 6, the first sealing seat ring 4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the first sealing seat ring 4 is provided with a first cavity 8 and a second cavity 9, the second sealing seat ring 5, the first sealing seat ring 4 and the rotating shaft 2 form a third cavity 10, a fourth cavity 11 is formed between the rotating shaft 2 and the first sealing seat ring 4, and the first cavity 8, the sealing end cover 3 is connected with an exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, a first air inlet pipe 14 penetrating through the first sealing seat ring 4 is connected to the first cavity 8, and a second air inlet pipe 15 penetrating through the first sealing seat ring 4 is connected to the second cavity 9.
The multi-layer sealing teeth comprise a first layer of sealing teeth 16, a second layer of sealing teeth 17 and a third layer of sealing teeth 18, the first layer of sealing teeth 16, the second layer of sealing teeth 17 and the third layer of sealing teeth 18 are sequentially arranged on the first sealing seat ring 4 from top to bottom, and the second sealing brush 7 is located above the first layer of sealing teeth 16.
The clearance between the first layer of seal teeth 16 and the rotating shaft 2 is smaller than the clearance between the second layer of seal teeth 17 and the rotating shaft 2, and the clearance between the second layer of seal teeth 17 and the rotating shaft 2 is smaller than the clearance between the third layer of seal teeth 18 and the rotating shaft 2.
The second sealing seat ring 5 is a radial adjustable seat ring, and a first sealing brush 6 on the second sealing seat ring 5 is in contact with the rotating shaft 2.
The axial height of the air inlet channel 12 is 100mm, and the ratio of the axial height of the air inlet channel 12 to the axial height of the first cavity 8 is 1.
The first sealing seat ring 4 and the sealing end cover 3 are of an integrally formed structure, and the first cavity 8, the second cavity 9 and the third cavity 10 are communicated in the circumferential direction.
In another preferred embodiment, the first seal ring 4 and the end cap 3 are integrally formed, and the first cavity 8, the second cavity 9 and the third cavity 10 penetrate through each other in the circumferential direction, so that the strength of the overall structure can be improved, and the sealing effect can be guaranteed.
Example 6
Referring to fig. 1, a vertical hydro-generator bearing oil groove combined sealing device comprises an oil groove 1, a rotating shaft 2, a sealing end cover 3, a first sealing seat ring 4 and a second sealing seat ring 5, wherein one side of the sealing end cover 3 is connected with the lower end of the first sealing seat ring 4, the other side of the sealing end cover 3 is fixedly connected with the oil groove 1, the upper end of the first sealing seat ring 4 is connected with the lower end of the second sealing seat ring 5, the upper end of the second sealing seat ring 5 is connected with a first sealing brush 6, the first sealing seat ring 4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the first sealing seat ring 4 is provided with a first cavity 8 and a second cavity 9, the second sealing seat ring 5, the first sealing seat ring 4 and the rotating shaft 2 form a third cavity 10, a fourth cavity 11 is formed between the rotating shaft 2 and the first sealing seat ring 4, and the first cavity 8, the sealing end cover 3 is connected with an exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, a first air inlet pipe 14 penetrating through the first sealing seat ring 4 is connected to the first cavity 8, and a second air inlet pipe 15 penetrating through the first sealing seat ring 4 is connected to the second cavity 9.
The multi-layer sealing teeth comprise a first layer of sealing teeth 16, a second layer of sealing teeth 17 and a third layer of sealing teeth 18, the first layer of sealing teeth 16, the second layer of sealing teeth 17 and the third layer of sealing teeth 18 are sequentially arranged on the first sealing seat ring 4 from top to bottom, and the second sealing brush 7 is located above the first layer of sealing teeth 16.
The clearance between the first layer of seal teeth 16 and the rotating shaft 2 is smaller than the clearance between the second layer of seal teeth 17 and the rotating shaft 2, and the clearance between the second layer of seal teeth 17 and the rotating shaft 2 is smaller than the clearance between the third layer of seal teeth 18 and the rotating shaft 2.
The second sealing seat ring 5 is a radial adjustable seat ring, and a first sealing brush 6 on the second sealing seat ring 5 is in contact with the rotating shaft 2.
The axial height of the air inlet channel 12 is 5mm, and the ratio of the axial height of the air inlet channel 12 to the axial height of the first cavity 8 is 0.05.
The first sealing seat ring 4 and the sealing end cover 3 are of an integrally formed structure, and the first cavity 8, the second cavity 9 and the third cavity 10 are communicated in the circumferential direction.
The first cavity 8 is used for introducing high-pressure air, and the second cavity 9 is used for introducing normal-pressure air.
In the best implementation mode of the present embodiment, one side of a sealing end cover 3 is connected with the lower end of a sealing seat ring I4, the other side of the sealing end cover 3 is fixedly connected with an oil groove 1, the upper end of the sealing seat ring I4 is connected with the lower end of a sealing seat ring II 5, the upper end of the sealing seat ring II 5 is connected with a first sealing brush 6, the sealing seat ring I4 is connected with a second sealing brush 7 and a plurality of layers of sealing teeth, the sealing seat ring I4 is provided with a cavity I8 and a cavity II 9, the sealing seat ring II 5, the sealing seat ring I4 and a rotating shaft 2 form a cavity III 10, a cavity IV 11 is formed between the rotating shaft 2 and the sealing seat ring I4, the cavity I8 is communicated with the cavity IV 11 through an air inlet channel 12, the sealing end cover 3 is connected with an air exhaust pipe 13, the exhaust pipe 13 is communicated with the oil groove 1, the cavity I8 is connected with an, when the oil mist spraying device is used, gas in the cavity IV 11 passes through the plurality of layers of sealing teeth to reach the second sealing brush 7, the gas enters gaps among the brush hairs to form turbulence, the oil mist spraying device has good self-sealing performance, the cavity IV 11 can be communicated with the oil groove 1 only through the plurality of layers of sealing teeth, the direction of high-pressure jet gas is kept in the direction opposite to the oil mist overflowing direction all the time, the sealing seat ring I4, the sealing seat ring II 5 and the rotating shaft 2 form a cavity III 10 with good sealing performance, and the sealing performance of the brush hair side of the cavity IV 11 is further improved; as a whole, than prior art, the oil mist must spill over the gaseous cooperation of efflux opposite in direction with the oil mist through the good cavity of a plurality of leakproofness from oil groove 1 to oil groove 1 outward, combines the sealed tooth structure of multilayer to can effectively seal the oil mist, prevent that the oil mist from leaking, very big promotion the sealed effect of oil mist.
The first cavity 8 is used for introducing high-pressure air, the second cavity 9 is used for introducing normal-pressure air, high-pressure gas enters the first cavity 8 through the first air inlet pipe 14, the first cavity 8 plays a role in pressure equalizing, the high-pressure gas in the first cavity 8 in the subsequent process of entering the fourth cavity 11 is convenient to form jet gas which is uniform and continuous and has an opposite direction to the overflow direction of oil mist, and the normal-pressure gas in the second cavity 9 can play a role in air supplement.
Claims (4)
1. The utility model provides a vertical hydraulic generator bearing oil groove combination sealing device, includes oil groove (1), rotation axis (2) and end cover (3), its characterized in that: the sealing device is characterized by further comprising a first sealing seat ring (4) and a second sealing seat ring (5), wherein one side of the first sealing seat ring (3) is connected with the lower end of the first sealing seat ring (4), the other side of the first sealing seat ring (3) is fixedly connected with the oil groove (1), the upper end of the first sealing seat ring (4) is connected with the lower end of the second sealing seat ring (5), the upper end of the second sealing seat ring (5) is connected with a first sealing brush (6), the first sealing seat ring (4) is connected with a second sealing brush (7) and a plurality of layers of sealing teeth, the first sealing seat ring (4) is provided with a first cavity (8) and a second cavity (9), the second sealing seat ring (5), the first sealing seat ring (4) and the rotating shaft (2) form a third cavity (10), a fourth cavity (11) is formed between the rotating shaft (2) and the first sealing seat ring (4), and the first cavity (8) is communicated with the, be connected with exhaust tube (13) on end cover (3), exhaust tube (13) and oil groove (1) intercommunication, be connected with intake pipe (14) that run through seal seat circle (4) on cavity (8), be connected with intake pipe two (15) that run through seal seat circle (4) on cavity two (9), seal seat circle two (5) are radial adjustable seat circle, and first sealed brush (6) on seal seat circle two (5) contact with rotation axis (2), seal seat circle one (4) and end cover (3) are the integrated into one piece structure, and cavity one (8), cavity two (9) and cavity three (10) link up along the circumferencial direction, cavity one (8) are used for letting in high-pressure air, and cavity two (9) are used for letting in ordinary pressure air.
2. The combined sealing device for the bearing oil groove of the vertical hydro-generator according to claim 1, characterized in that: the multilayer sealing teeth comprise first layer sealing teeth (16), second layer sealing teeth (17) and third layer sealing teeth (18), the first layer sealing teeth (16), the second layer sealing teeth (17) and the third layer sealing teeth (18) are sequentially arranged on the first sealing seat ring (4) from top to bottom, and the second sealing hairbrush (7) is located above the first layer sealing teeth (16).
3. The combined sealing device for the bearing oil groove of the vertical hydro-generator according to claim 2, characterized in that: the clearance between the first layer of sealing teeth (16) and the rotating shaft (2) is smaller than the clearance between the second layer of sealing teeth (17) and the rotating shaft (2), and the clearance between the second layer of sealing teeth (17) and the rotating shaft (2) is smaller than the clearance between the third layer of sealing teeth (18) and the rotating shaft (2).
4. The combined sealing device for the bearing oil groove of the vertical hydro-generator according to claim 1, characterized in that: the axial height of the air inlet channel (12) is 0.5-100mm, and the ratio of the axial height of the air inlet channel (12) to the axial height of the first cavity (8) is 0.01-1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010157243.1A CN111365459B (en) | 2020-03-09 | 2020-03-09 | Combined sealing device for bearing oil groove of vertical hydro-generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010157243.1A CN111365459B (en) | 2020-03-09 | 2020-03-09 | Combined sealing device for bearing oil groove of vertical hydro-generator |
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| CN111365459A true CN111365459A (en) | 2020-07-03 |
| CN111365459B CN111365459B (en) | 2022-04-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524249A (en) * | 2020-12-17 | 2021-03-19 | 东方电气集团东方电机有限公司 | Oil groove sealing structure |
| CN114110169A (en) * | 2021-11-22 | 2022-03-01 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention air outlet sealing structure of generator |
| CN114658855A (en) * | 2022-03-23 | 2022-06-24 | 浙江大学 | Main shaft vacuum oil mist prevention dynamic sealing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205780892U (en) * | 2016-06-20 | 2016-12-07 | 东方电气集团东方电机有限公司 | Vertical hydrogenerator sealing device |
| CN209976688U (en) * | 2019-05-08 | 2020-01-21 | 哈尔滨通能电气股份有限公司 | Contact brush type oil and oil mist preventing device |
-
2020
- 2020-03-09 CN CN202010157243.1A patent/CN111365459B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205780892U (en) * | 2016-06-20 | 2016-12-07 | 东方电气集团东方电机有限公司 | Vertical hydrogenerator sealing device |
| CN209976688U (en) * | 2019-05-08 | 2020-01-21 | 哈尔滨通能电气股份有限公司 | Contact brush type oil and oil mist preventing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524249A (en) * | 2020-12-17 | 2021-03-19 | 东方电气集团东方电机有限公司 | Oil groove sealing structure |
| CN114110169A (en) * | 2021-11-22 | 2022-03-01 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention air outlet sealing structure of generator |
| CN114110169B (en) * | 2021-11-22 | 2024-04-26 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention airtight structure of generator |
| CN114658855A (en) * | 2022-03-23 | 2022-06-24 | 浙江大学 | Main shaft vacuum oil mist prevention dynamic sealing device |
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| Publication number | Publication date |
|---|---|
| CN111365459B (en) | 2022-04-05 |
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