CN202327101U - Sealing device for oil-lubricated sliding bearing - Google Patents
Sealing device for oil-lubricated sliding bearing Download PDFInfo
- Publication number
- CN202327101U CN202327101U CN2011203433603U CN201120343360U CN202327101U CN 202327101 U CN202327101 U CN 202327101U CN 2011203433603 U CN2011203433603 U CN 2011203433603U CN 201120343360 U CN201120343360 U CN 201120343360U CN 202327101 U CN202327101 U CN 202327101U
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- China
- Prior art keywords
- seal ring
- sliding bearing
- sealing
- ring
- oil
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- 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 - Fee Related
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- Sealing Devices (AREA)
- Sealing Of Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a sealing device for an oil-lubricated sliding bearing, which relates to the sealing device. At present, sealing is performed by often adopting a lengthened sealing path, so that the manufacturing cost is increased, and inconvenience is brought to the assembly and the subsequent maintenance of a motor, and as a sealing element is contacted with a rotating shaft and is rubbed, the sealing element can be easily abraded and needs to be maintained and replaced at regular intervals, and the use cost is high. The utility model is characterized in that the sealing device comprises an air seal seat and a sealing ring, wherein the air seal seat is arranged on the end face of the outer side of a sliding bearing block; the sealing ring is tightly sheathed onto the rotating shaft; the air seal seat is provided with a sealing ring containing cavity opened to the outer side so as to contain the sealing ring; the outer ring of the sealing ring is provided with an external thread, so that the air located at the side of the motor enters the side of the sliding bearing block through the external thread under the rotation of the rotating shaft; and the air seal seat and the outer ring of the sealing ring are in clearance fit. When the sealing ring rotate at a high speed in unthreaded holes which are approximate in diameter by utilizing the external thread, a pumping action can be generated, and thereby, oil leakage is effectively prevented. The sealing device for the oil-lubricated sliding bearing has the advantages that the structure is simple; the cost is low; the assembly is convenient; maintenance or displacement is not needed; contact friction cannot be generated; and the service life is long.
Description
Technical field
The utility model relates to a kind of seal arrangement.
Background technique
At present; Many equipment all need be used oil lubrication high-speed slide bearing, such as medium-and-large-sized bipolar machine, high speed ventilator etc., on these equipment; Bearing plays crucial supporting effect; Will bear on the one hand the load such as deadweight, rotary centrifugal force, unilateral magnetic force of equipment rotor, also will overcome the heat that axle and bearing shell rub and bring relatively simultaneously, its ride quality often is related to the Safety performance of entire equipment system.High-speed slide bearing inboard often is in the negative pressuren zone of wind path in the equipment, and inevitably has small between centers crack between pedestal and the equipment rotating shaft.During work; Lubricant oil in the sliding bearing forms the elevated pressures mist of oil in the pedestal oil pocket under the stirring of the high speed extruding of axle and disc, its pressure is greater than the air pressure of motor internal negative pressuren zone; Under the effect of pressure reduction; This mist of oil can move to motor internal through the between centers crack, is arrived interior by motor " suction " seemingly, just forms bearing " leakage of oil " in motor in the course of time.
The leakage of oil to the inside of motor sliding bearing endangers quite big.
The bleed mist of oil of motor internal under the effect of motor internal hot air, can infiltrate in the insulating material of winding, reduce insulation resistance in addition cause that electrical machine insulation lost efficacy, the life-span reduces, the operation of serious threat motor also might lead to security incident;
In addition, the higher relatively mist of oil of temperature with process that the relatively low inboard wall of base of temperature contacts in, can condense into liquid state, be collected to motor bottom, cause waste, and serious environment pollution.
But industry all is to adopt the principle of lengthening sealed pathway to solve this problem basically at present, and is not enough below this exists:
1. use Sealing more, increased manufacture cost;
2. make troubles to motor assembling, follow-up maintenance;
3. contact with running shaft because of Sealing and rubbed, inevitably have wear problem, therefore need periodical repair, replacing, this tends to increase user cost and causes the idleness of equipment.
This shows, adopt a kind of advanced more practical leakproof oil seal technology very necessary for such high-speed bearing.
The model utility content
The technical problem that the utility model will solve and the technical assignment of proposition are that the existing technology scheme is improved and improved, and a kind of oil lubrication sliding bearing seal arrangement is provided, and reaching anti-leakage of oil, and sealing configuration is with low cost, easy to assembly; Maintenance free, need not to change; Contactless frottage, long purpose of life-span.
For this reason, the utility model is taked following technological scheme.
A kind of oil lubrication sliding bearing seal arrangement; It is characterized in that: seal arrangement comprises the sealing gland seat of being located at plain bearing housing outside end face, is used for tightly being enclosed within the seal ring in the rotating shaft; Described sealing gland seat is provided with the seal ring receiving cavity of opening laterally to hold seal ring; Described seal ring outer ring is provided with outside thread makes the air that is positioned at motor side under the rotation of rotating shaft, get into plain bearing housing side, sealing gland seat and seal ring outer ring Spielpassung through outside thread.Utilize outside thread in the close unthreaded hole of diameter, during high speed rotating, can produce " pumping " effect.In view of medium-and-large-sized bipolar machine often all is a high speed rotating, and rotation direction is unique, turns clockwise or is rotated counterclockwise, and the gap between rotating shaft and the bearing support sealing gland seat endoporus is very little, and both relative velocities are very big during rotation.Utilize " pumping " principle, on machine shaft, with the corresponding section of the inboard sealing gland seat of bearing support sealing thread is set, this thread rotary orientation and motor rotation direction have substantial connection, and in the time of should guaranteeing the motor shaft high speed rotating, " pumping " direction of screw thread is towards the motor outside.
The effect of this pumping thread is mainly reflected in:
A. can the supercharging air in the between centers crack be offset inside and outside differential pressure, the power source that mist of oil flows is eliminated, fundamentally stop the mist of oil in the bearing to advance towards motor internal.
Even b. have a little fluid oil to drop or aggegation on inner axle, also can be by screw thread " pumping " to the outside.
Device comprises and adopts the seal ring establish screw thread, effectively prevents leakage of oil, and sealing configuration is with low cost, easy to assembly; Maintenance free, need not to change; Contactless frottage, life-span are long.
As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature.
Described sealing gland seat is provided with rotary shaft hole, and the hole wall of rotary shaft hole is provided with seal ring, and described rotary shaft hole is positioned at the inboard of seal ring receiving cavity.
The outboard end of described seal ring is provided with evagination in externally threaded back-up ring, and said seal ring receiving cavity medial extremity is provided with the circular groove with the back-up ring Spielpassung.The diameter of back-up ring is greater than outer line, and centrifugal force can be used for getting rid of oil greatly.
Described sealing gland seat is provided with horn mouth, and bell-mouthed minimum diameter is greater than the seal ring receiving cavity.
The outside end face of described seal ring is provided with a plurality of dismounting screws.
Be provided with crashproof gap between the seal ring receiving cavity of the medial extremity of described seal ring and sealing gland seat.
Beneficial effect: effectively prevent leakage of oil, sealing configuration is with low cost, easy to assembly; Maintenance free, need not to change; Contactless frottage, life-span are long.
Description of drawings
Fig. 1 is the utility model mounting structure schematic representation.
Fig. 2 is a seal ring sectional structure schematic representation.
Fig. 3 is that the A of Fig. 2 is to structural representation.
Among the figure: the 1-plain bearing housing, 2-sealing gland seat, the 3-rotating shaft, the 4-seal ring, the 5-outside thread, the 6-back-up ring, 7-dismantles screw, the crashproof gap of 8-.
Embodiment
Below in conjunction with Figure of description the technological scheme of the utility model is done further detailed description.
As shown in Figure 1; The utility model comprise through screw be screwed onto plain bearing housing 1 outside end face sealing gland seat 2, be used for tightly being enclosed within the seal ring 4 in the rotating shaft 3; Described sealing gland seat 2 is provided with the seal ring receiving cavity of opening laterally to hold seal ring 4; Described seal ring 4 outer rings are provided with outside thread 5 makes the air that is positioned at motor side under the rotation of rotating shaft 3, get into plain bearing housing 1 side through outside thread 5, sealing gland seat 2 and seal ring 4 outer ring Spielpassung.Seal ring 4 adopts interference fit with motor shaft, is assemblied in the hot jacket method in the sealing gland seat 2 of bearing.Described sealing gland seat 2 is provided with rotary shaft hole, and the hole wall of rotary shaft hole is provided with seal ring, and described rotary shaft hole is positioned at the inboard of seal ring receiving cavity.The outboard end of seal ring 4 is provided with the back-up ring 6 of evagination in outside thread 5, and said seal ring receiving cavity medial extremity is provided with the circular groove with back-up ring 6 Spielpassung.Sealing gland seat 2 is provided with horn mouth, and bell-mouthed minimum diameter is greater than the seal ring receiving cavity.For making air can get into outside thread 5 passages, and avoid friction, be provided with crashproof gap 8 between the seal ring receiving cavity of the medial extremity of seal ring 4 and sealing gland seat 2.
Like Fig. 2, shown in 3, for for convenience detach, end face is provided with a plurality of dismounting screws 7 in the outside of seal ring 4.
Above Fig. 1,2, a kind of oil lubrication sliding bearing seal arrangement shown in 3 are the specific embodiments of the utility model; The utility model substantive distinguishing features and progress have been embodied; Can be according to the use needs of reality; Under the enlightenment of the utility model, it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection domain of this programme.
Claims (6)
1. oil lubrication sliding bearing seal arrangement; It is characterized in that: seal arrangement comprises the sealing gland seat (2) of being located at plain bearing housing (1) outside end face, is used for tightly being enclosed within the seal ring (4) in the rotating shaft (3); Described sealing gland seat (2) is provided with seal ring receiving cavity to plain bearing housing (1) side opening to hold seal ring (4); Described seal ring (4) outer ring is provided with outside thread (5) makes the air that is positioned at motor side under the rotation of rotating shaft (3), get into plain bearing housing (1) side through outside thread (5), sealing gland seat (2) and seal ring (4) outer ring Spielpassung.
2. a kind of oil lubrication sliding bearing seal arrangement according to claim 1, it is characterized in that: described sealing gland seat (2) is provided with rotary shaft hole, and the hole wall of rotary shaft hole is provided with seal ring, and described rotary shaft hole is positioned at the inboard of seal ring receiving cavity.
3. a kind of oil lubrication sliding bearing seal arrangement according to claim 1; It is characterized in that: the outboard end of described seal ring (4) is provided with the back-up ring (6) of evagination in outside thread (5), and said seal ring receiving cavity medial extremity is provided with the circular groove with back-up ring (6) Spielpassung.
4. a kind of oil lubrication sliding bearing seal arrangement according to claim 3, it is characterized in that: described sealing gland seat (2) is provided with horn mouth, and bell-mouthed minimum diameter is greater than the seal ring receiving cavity.
5. a kind of oil lubrication sliding bearing seal arrangement according to claim 4, it is characterized in that: the outside end face of described seal ring (4) is provided with a plurality of dismounting screws (7).
6. a kind of oil lubrication sliding bearing seal arrangement according to claim 5 is characterized in that: be provided with crashproof gap (8) between the seal ring receiving cavity of the medial extremity of described seal ring (4) and sealing gland seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203433603U CN202327101U (en) | 2011-09-14 | 2011-09-14 | Sealing device for oil-lubricated sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203433603U CN202327101U (en) | 2011-09-14 | 2011-09-14 | Sealing device for oil-lubricated sliding bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202327101U true CN202327101U (en) | 2012-07-11 |
Family
ID=46439080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203433603U Expired - Fee Related CN202327101U (en) | 2011-09-14 | 2011-09-14 | Sealing device for oil-lubricated sliding bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202327101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204364A (en) * | 2017-12-29 | 2018-06-26 | 浙江创为真空设备股份有限公司 | A kind of Roots vaccum pump shaft seal structure |
-
2011
- 2011-09-14 CN CN2011203433603U patent/CN202327101U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204364A (en) * | 2017-12-29 | 2018-06-26 | 浙江创为真空设备股份有限公司 | A kind of Roots vaccum pump shaft seal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20180914 |