KR101877263B1 - Bearing assembly having plate for removing bubbles and oil mist - Google Patents

Bearing assembly having plate for removing bubbles and oil mist Download PDF

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Publication number
KR101877263B1
KR101877263B1 KR1020160033126A KR20160033126A KR101877263B1 KR 101877263 B1 KR101877263 B1 KR 101877263B1 KR 1020160033126 A KR1020160033126 A KR 1020160033126A KR 20160033126 A KR20160033126 A KR 20160033126A KR 101877263 B1 KR101877263 B1 KR 101877263B1
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KR
South Korea
Prior art keywords
vapor
plate
casing
bearing assembly
bubbles
Prior art date
Application number
KR1020160033126A
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Korean (ko)
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KR20170109261A (en
Inventor
최성필
전창우
Original Assignee
(주)터보링크
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Priority to KR1020160033126A priority Critical patent/KR101877263B1/en
Publication of KR20170109261A publication Critical patent/KR20170109261A/en
Application granted granted Critical
Publication of KR101877263B1 publication Critical patent/KR101877263B1/en

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/02—Assembling sliding-contact bearings
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/62—Positive connections with pins, bolts or dowels

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The present invention includes a casing 130 for supporting a rotating shaft S passing through the inside and connecting the base plate 110 and the cover 120 and the cover and the base plate at the sides, (300) for removing bubbles and vapors generated in the lubricating oil at a position spaced a predetermined distance from the oil level surface (210) of the lubricating oil. do.
According to the present invention, the bubbles and the vapor generated in the bearing assembly can be easily removed by the above-described structure, so that the internal pressure of the bearing assembly excessively increases, thereby solving the problem of leakage of the lubricating oil.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bearing assembly having a plate for removing bubbles and vapor,

More particularly, the present invention relates to a vertical thrust bearing assembly, in which lubricating oil exists in a vertical thrust bearing assembly, and lubricating oil rotates together with high-speed rotation of the rotary shaft, so that a part of the lubricating oil is generated as bubbles or vapor. Is an invention relating to a method for removing such bubbles and vapor.

Generally, bearings are used to support the rotating shaft which rotates in the machinery. Various bearings exist depending on the direction and shape of the support shaft such as ball bearings, rolling bearings, thrust bearings, etc. In power plants, And a cooling pump for cooling. The steam turbine, the cooling pump, and the like are mainly used with journal bearings or thrust bearings using a tilting pad. In a machine requiring a high-speed rotation and a high output such as a turbocompressor, the pressure output due to rotation of the impeller and the power transmitted from the motor are transmitted through the gear, so that a considerable load is applied in one direction. It is a very suitable bearing considering the rigidity.

However, among the bearings utilizing such a tilting pad, in the case of the thrust bearing assembly, a large number of lubricant oil exists in the bearing assembly. That is, a plurality of lubrication oil is supplied between the collar of the rotating shaft and thrust pads in contact with the journal bearing in contact with the rotating shaft for the purpose of smooth rotation, prevention of wear, and cooling. However, such a lubricating oil flows at a high speed due to the rotation of the rotary shaft and becomes hot, thereby causing a problem that bubbles and vapor are generated inside the bearing assembly.

The generation of bubbles and vapors is a common problem in all types of bearings as well as vertical thrust bearings.

The inside of the vertical bearing assembly is supplied with lubricating oil and kept sealed with the outside to prevent the internal lubricating oil from leaking to the outside. However, when bubbles and vapor are generated in the lubricating oil, the pressure inside the bearing assembly is increased, and a gap is formed between some components of the bearing assembly, thereby causing a problem of leakage of the lubricating oil. Particularly, leakage is a problem between the casing and the cover, between the collar and the seal gap, and the air vent assembled at the top of the cover.

This may be a problem that occurs because the bearing assembly can not be an integral product and is an assembly in which a number of components are assembled with the lubricant contained therein. Therefore, it has been necessary to take measures to remove the lubricating oil bubbles and vapor in the bearing assembly.

The present invention aims at solving the problem of part of the lubricating oil existing inside the bearing assembly becoming bubbles and vaporizing during operation of the bearing and specifically to provide means for removing the bubbles and vapor as they are rising do.

A bearing assembly comprising a base plate (110), a casing (120), and a cover (130) while supporting a rotating shaft (S) passing through the inside of the bearing assembly A bubble and a vapor removing plate 300 are provided at a position spaced apart by a predetermined distance from each other to remove bubbles and vapor generated in the lubricating oil.

The plate for removing the bubbles and the vapor is in the shape of a plate having an empty circular shape at the center, and is fixed to the cover with bolts.

The outer circumferential surface of the rotary shaft is provided with an anti-vortex guide having a cross-sectional shape of being in contact with lubricating oil, and the inner end surface of the plate for removing bubbles and vapor is located on the upper side of the anti-vortex guide.

And an outer cross-section of the bubble and vapor-removing plate is spaced apart from the casing by a predetermined distance.

In the present invention, a lower thrust casing (140) is coupled to the upper surface of the base plate, and a lower thrust pad (150) is disposed on the upper side of the lower thrust casting, do.

According to the present invention, the bubbles and the vapor generated in the bearing assembly can be easily removed by the above-described structure, thereby solving the problem of leakage of the lubricating oil. Particularly, the problem of leakage of the lubricating oil into the space between the casing 120 and the cover 130, the space between the collar C and the seal gap, and the air vent assembled to the upper portion of the cover is solved.

In addition, there is an advantageous effect of increasing the durability of the bearing assembly by solving the problem of leakage of a part of the lubricating oil due to bubbles and vapors generated inside the bearing assembly.

1 is a side cross-sectional view of a thrust bearing assembly according to an embodiment of the present invention,
2 is a partial configuration of a thrust bearing assembly according to an embodiment of the present invention,
Figs. 3 and 4 are partial detail views of Fig.
FIG. 5 is a cross-sectional side view showing the parts of the thrust bearing assembly according to one embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to a thrust bearing assembly according to an embodiment of the present invention shown in FIG.

FIG. 1 is a side cross-sectional view of a thrust bearing assembly according to an embodiment of the present invention, FIG. 2 is a partial structure of a thrust bearing assembly according to an embodiment of the present invention, and FIGS.

The thrust bearing assembly according to the present invention includes a rotating shaft (S) that rotates through a center and a collar (C) that is coupled to the rotating shaft outer peripheral surface and rotates together. A thrust bearing for supporting the collar C in the axial direction of the rotary shaft and a journal bearing for supporting the rotary shaft in the radial direction are provided.

The thrust bearing includes a lower thrust pad 150 for supporting the collar from below and an upper thrust 180 for supporting the collar from the upper side. The lower thrust pad is usually composed of a tilting pad, and the upper thrust is a pad that supports a reverse force that may occur irregularly. The journal bearing is a journal pad 170 that supports the outer circumferential surface of the collar in a radial direction.

In the present invention, a lower thrust casing (140) is coupled to the upper surface of the base plate, and a lower thrust pad (150) is disposed on the upper side of the lower thrust casting, do.

The lower thrust pad 150 is composed of a tilting pad and is supported on the upper side of the lower thrust casing 140 to be tilted. Since the general shape and structure of the tilting pad bearing are commonly used in this field, a detailed description thereof will be omitted.

Further, the bearing assembly of the present invention further includes an inner support 160 coupled to the journal pad to support the journal pad on the outer circumferential surface, and the inner support is coupled to the base plate by bolts. In addition, as the rotary shaft rotates at a high speed, the lubricant also flows and the vortex may occur at this time. However, the anti-vortex guide 190 may be further included to prevent the vortex.

The body 100 includes a base plate 110, a casing 120, and a cover 130. The body 130 includes a rotating shaft S, a collar, a thrust bearing, and a journal bearing. Inside the body, lubricating oil 200 is accommodated, friction force is reduced between the rotating part and the supporting part, smooth rotation is performed, and cooling is performed. Each of these assemblies is firmly coupled to each other with bolts B of an appropriate size and number so as to seal the inside of the assemblies so that the internal lubricant is not discharged to the outside.

Generally, the lubricating oil inside the bearing assembly can generate bubbles and vapor by rotating the rotary shaft at a high speed, and it is necessary to remove the lubricating oil as described above.

In the present invention, a plate 300 for removing bubbles and vapor is provided as means for removing bubbles and vapor generated in the lubricating oil in the bearing assembly.

The bubble and vapor removing plate 300 according to the present invention is disposed at a position spaced upward from the oil level surface 210 of the lubricating oil 200. That is, between the lubricating oil and the cover. Referring to FIGS. 2 to 4, the plate for removing the bubbles and the vapor is formed in a plate shape having an empty circular shape at the center, and is fixed to the cover using bolts (B). A through hole through which the bolt B passes is formed in the bubble and vapor removing plate 300. A groove is formed in the bottom surface of the cover 130 to fasten the bolt end, It is fastened to the outer surface of the bolt by screw connection. That is, the cover is formed on the lower surface of the cover, not the through hole.

An anti-vortex guide 190 having a cross-sectional shape of being in contact with lubricating oil is disposed outside the collar C which is coupled to the outer circumferential surface of the rotary shaft. The inner cross section of the bubble and vapor removing plate 300 is disposed so as to be slightly spaced from the upper side of the anti-vortex guide 190, and the outer cross section of the bubble and vapor removing plate is spaced apart from the casing . In this state, the bubble and the vapor removing plate are disposed while covering most of the upper portion of the lubricating oil surface existing in the bearing assembly.

In this state, when the lubricating oil flows due to the high-speed rotation of the rotary shaft, the bubbles and the vapor generated in the lubricating oil rise up to reach the bubbles and the vapor removing plate 300 located on the upper side and the bubbles and the vapor are destroyed and removed It is a principle. That is, when the bubble or vapor generated in the bearing assembly rises up to the plate and the plate temperature is relatively low, the bubble breaks down and the gas The vapor of the state is condensed into a liquid state and is descended and removed.

In the present invention, bubbles and vapors generated in the lubricating oil are easily removed by the bubbles and the vapor removing plate, so that bubbles and vapor can be removed early even if bubbles and vapor are generated in the lubricating oil. Therefore, it is possible to prevent the pressure inside the bearing assembly from rising due to the occurrence of bubbles and oil vapor, and as a result, it is possible to prevent the problem of leakage of the lubricant due to breakage of the seal, .

The present invention is applicable to all types of bearings, including rolling bearings as well as vertical thrust bearings. However, the above description and drawings are only illustrative of vertical thrust bearings as one example, and the application fields and the scope of the present invention are not limited to the shapes shown in the drawings.

110: base plate 120: casing
130: Cover 140: Lower thrust casing
150: Lower thrust pad 160: Inner support
170: journal pad 180: upper thrust
190: Anti-Vortex Guide 200: Lubricant
210: lubricating oil surface 300: plate for removing bubbles and vapor

Claims (5)

A hollow casing 120 which is coupled to the base plate 110 and the base plate 110 while supporting a rotating shaft S passing through the inside of the casing 120 and a cover 130 covering the opened upper portion of the casing 120 A bearing assembly configured to receive a lubricating oil (200) therein,
A bubble and a vapor removing plate 300 are provided at a position spaced upward from the oil level surface 210 of the lubricating oil,
A through hole through which the bolt passes is formed in the bubble and oil vapor removal plate 300. A groove is formed on the lower surface of the cover 130 to fasten the end of the bolt and is screwed, A space-retaining bushing having a hollow cylindrical shape is disposed between the cover and the cover to fix the position of the bubble and the vapor removal plate when the bolt is fastened,
An anti-vortex guide 190 having a cross-section 'C' in contact with lubricating oil is disposed outside the collar C, which is coupled to the outer circumferential surface of the rotary shaft,
An inner end surface of the bubble and vapor removing plate 300 is disposed on the upper side of the anti-vortex guide 190,
Wherein an inner surface of the casing has a stepped shape protruding into the casing when moving along the upper direction from the lower portion,
Wherein an outer end of the plate for removing bubbles and vapor is disposed in a state of being spaced apart from a step portion of the casing by a predetermined distance d,
As a result, when the bubble or vapor generated in the bearing assembly rises upward and reaches the plate for removing the bubbles and the vapor, the bubbles are broken down and the vapor in the gaseous state is condensed into the liquid state and removed, Wherein a bubble or a vapor rising along the inner surface of the casing is changed in flow direction by the step portion to be lowered. The method according to claim 1,
Wherein the plate for removing the bubbles and the vapor is in the shape of an empty plate at the center,
Wherein the bearing assembly is secured to the cover using bolts. delete delete 3. The method according to claim 1 or 2,
A lower thrust casing 140 is coupled to an upper surface of the base plate,
A lower thrust pad (150) is disposed above the lower thrust casing (140) to support the rotation of the collar (C) in the axial direction.
KR1020160033126A 2016-03-21 2016-03-21 Bearing assembly having plate for removing bubbles and oil mist KR101877263B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160033126A KR101877263B1 (en) 2016-03-21 2016-03-21 Bearing assembly having plate for removing bubbles and oil mist

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160033126A KR101877263B1 (en) 2016-03-21 2016-03-21 Bearing assembly having plate for removing bubbles and oil mist

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KR20170109261A KR20170109261A (en) 2017-09-29
KR101877263B1 true KR101877263B1 (en) 2018-08-09

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101192198B1 (en) * 2005-12-30 2012-10-17 엘지전자 주식회사 Apparatus for reducing foaming of scroll compressor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039891B2 (en) * 1981-10-01 1985-09-07 富士電機株式会社 rotating machine bearings
JPH0979263A (en) * 1995-09-20 1997-03-25 Hitachi Ltd Bearing device and spindle motor provided with same
KR100391595B1 (en) * 2000-10-25 2003-07-16 현대자동차주식회사 an oil reservoir of power streeing system in a car

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101192198B1 (en) * 2005-12-30 2012-10-17 엘지전자 주식회사 Apparatus for reducing foaming of scroll compressor

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