CN201209587Y - Pump bearing box seal structure - Google Patents
Pump bearing box seal structure Download PDFInfo
- Publication number
- CN201209587Y CN201209587Y CNU2008200880035U CN200820088003U CN201209587Y CN 201209587 Y CN201209587 Y CN 201209587Y CN U2008200880035 U CNU2008200880035 U CN U2008200880035U CN 200820088003 U CN200820088003 U CN 200820088003U CN 201209587 Y CN201209587 Y CN 201209587Y
- Authority
- CN
- China
- Prior art keywords
- oil
- bearing box
- circular groove
- seal structure
- sealing structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model relates to a pump bearing box sealing structure with good oil leakage prevention effect, which is characterized in that the position of a labyrinth sealing structure (3) of an end cover (2) is provided with an annular groove (8); the lower side of the annular groove is provided with a reflux hole (10) which is communicated with the annular groove; and the reflux hole is extended downwards, penetrated through the end wall of the lower side of a bearing box (1) and communicated in an oil storage cavity (5). The pump bearing box sealing structure is suitably used as the sealing structure component of the rotating unit of an oil lubricating bearing.
Description
Technical field
The utility model relates to thin oil lubricant bearing rotating machinery shaft extension place's leakproof oil seal structure.
Background technique
At the rotating machinery shaft extension place that adopts the thin oil lubricant bearing, all to add sealing and prevent that the interior oil leakage of bearing housing is outside bearing housing.Two classes that are sealed with commonly used: contact-type rubber seal and contactless labyrinth seal.Rubber seal is owing to be the contact friction formula, and working life is shorter, and is not suitable for the inflammable and explosive place that does not allow to produce static, as petroleum chemical industry.Labyrinth seal is contactless sealing, does not have relative solid friction, does not have the restriction in working life.But the effective prerequisite of labyrinth seal is, the oil level in the bearing housing must be more much lower than shaft extension place seal clearance nadir, and the oil that adheres to the shaft extension gap location when rotating shaft is turned round is got back in the cavity by drainback passage.When needing to make the shaft extension gap nearer from pasta because of design, or processing, assembling, on-the-spot install reason such as inclination make pasta from the shaft extension gap reason such as nearer, though when static pasta be lower than the shaft extension gap nadir and can leakage of oil, but, make the pasta between end cap and the bearing produce fluctuation in the running because of the factors such as disturbance of bearing roller; And the spacing between end cap and the bearing is less, buffer space is less, make the amplitude of this place's pasta fluctuation more much bigger than re-entrant portion between the two bearings, crest during the pasta fluctuation can be higher than the nadir in shaft extension gap, thereby make oil be leaked to the outside through the shaft extension gap, cause the excessive loss of lubricant oil, and polluted site environment.
Summary of the invention
The utility model will solve the existing not good enough problem of bearing housing labyrinth seal structure leak proof seal effect, and a kind of pump bearing case sealing configuration of the present utility model is provided for this reason, the good sealing effect of the anti-leakage of oil of this sealing configuration.
For addressing the above problem, its special way of the technological scheme that the utility model adopted is to be provided with circular groove at the labyrinth seal structure place of end cap, described circular groove downside is provided with the return port that connects with circular groove, and described return port extends downwards and break-through runs through oil storage chamber in bearing housing downside end wall.
The utility model is the cavity that an annular slot type is set in the intermediate portion of former labyrinth seal structure, and the circular groove downside is provided with the return port that connects with circular groove, and return port extends downwards and break-through runs through oil storage chamber in bearing housing downside end wall.Because packing ring shape gap is very little, leak the lubricants capacity of coming seldom, and the circular groove cavity volume is bigger, so lubricant oil is collected in together by cavity all.Because the return port cross-sectional area is bigger, and communicate with the bearing housing oil storage chamber, the flow of leakage makes flow resistance very little for a short time, so the oil level at return port place is fair with bearing oil tank chamber oil level; And the oil storage chamber volume between the two bearings is bigger, it is less to the influence of oil level rotated by bearing, herein oil level just the oil level at return port place be lower than the nadir in shaft extension gap all the time, exist height difference, the leakage oil in the circular groove cavity has just been got back in the bearing housing.Ring slot outside is labyrinth seal, is used to stop that oil continues the leakage along the shaft extension direction.The form of labyrinth seal is the circular groove sealing, also can be the labyrinth seal of spiral chute form, and the direction of spiral is pumped back in the circular groove oil in the labyrinth.Like this, guaranteed that bearing housing shaft extension place does not have the lubricant oil to external leakage all the time.
Description of drawings
Fig. 1 is bearing housing, end cap, bearing and the rotating shaft assemblying body partial structurtes schematic representation that is provided with common labyrinth seal structure;
Fig. 2 is bearing housing, end cap, bearing and the rotating shaft assemblying body partial structurtes schematic representation that is provided with the utility model sealing configuration.
Be labeled as among the figure: 1 bearing housing, 2 end caps, 3 labyrinth structures, 4 rotating shafts, 5 oil storage chambers, the indication of 6 bearing housing oil levels, 7 bearings, 8 circular grooves, the signal of 9 return port oil levels, 10 return ports.
Embodiment
Pump bearing case sealing configuration, end cap 2 is provided with labyrinth seal structure 3, the labyrinth seal structure middle part is provided with circular groove 8, and circular groove 8 downsides are provided with the return port 10 that connects with circular groove, and return port 10 extends downwards and break-through runs through oil storage chamber 5 in bearing housing 1 downside end wall.
Claims (1)
1, pump bearing case sealing configuration, it is characterized in that locating to be provided with circular groove (8) at the labyrinth seal structure (3) of end cap (2), described circular groove downside is provided with the return port (10) that connects with circular groove, and described return port extends downwards and break-through runs through oil storage chamber (5) in bearing housing (1) downside end wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200880035U CN201209587Y (en) | 2008-05-29 | 2008-05-29 | Pump bearing box seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200880035U CN201209587Y (en) | 2008-05-29 | 2008-05-29 | Pump bearing box seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201209587Y true CN201209587Y (en) | 2009-03-18 |
Family
ID=40480321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200880035U Expired - Lifetime CN201209587Y (en) | 2008-05-29 | 2008-05-29 | Pump bearing box seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201209587Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074792A (en) * | 2014-07-04 | 2014-10-01 | 北京中创天成科技发展有限公司 | Slurry pump bracket end bearing oil seat structural combination |
-
2008
- 2008-05-29 CN CNU2008200880035U patent/CN201209587Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074792A (en) * | 2014-07-04 | 2014-10-01 | 北京中创天成科技发展有限公司 | Slurry pump bracket end bearing oil seat structural combination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090318 |