CN207975145U - The sliding bearing sealing structure of decanter centrifuge screw spindle - Google Patents
The sliding bearing sealing structure of decanter centrifuge screw spindle Download PDFInfo
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- CN207975145U CN207975145U CN201721809964.6U CN201721809964U CN207975145U CN 207975145 U CN207975145 U CN 207975145U CN 201721809964 U CN201721809964 U CN 201721809964U CN 207975145 U CN207975145 U CN 207975145U
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- housing
- cover
- sealing ring
- hollow shaft
- bearing holder
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Centrifugal Separators (AREA)
Abstract
The utility model is related to a kind of sliding bearing sealing structures of decanter centrifuge screw spindle, including the support of bearing holder (housing, cover), sealing ring, big end and hollow shaft, it is characterized in that：On the hole wall of the bearing holder (housing, cover) endoporus on the basis of the center line of its total length, it is arranged oppositely left and right rotation helicla flute, left-turn spiral slot rotation direction close to sealing ring is identical as hollow shaft direction of rotation, right hand helix slot rotation direction far from sealing ring is with hollow shaft direction of rotation on the contrary, bearing holder (housing, cover) is equipped with the oil filler point of several and the perforation of left-right rotary helicla flute.Advantageous effect：Compared with prior art, the whole grease sealing structure that the utility model opposite direction left-and-right spiral slot+labyrinth seal is constituted.It has effectively sealed the lubricating grease in bearing holder (housing, cover) up for safekeeping, has played the function of relatively long-term storage lubricating grease, extend the function time of lubricating grease, reduce the frequency of grease up, save maintenance downtime, greatly improve the production efficiency of machine.
Description
Technical field
The utility model belongs to field of centrifugal machine equipment more particularly to a kind of sliding bearing of decanter centrifuge screw spindle
Sealing structure.
Background technology
Decanter centrifuge is installed on the sealing structure of the big end support and small end support internal slide bearing of rotary drum on engine base,
Attached drawing 3 is referred to, bearing holder (housing, cover) 01, sealing ring 02, big end support 03 and hollow shaft 04, big end support is internal to be equipped with sealing ring and axis
Bearing sleeve, hollow shaft are supported on bearing holder (housing, cover), and hollow shaft does relative rotary motion relative to big end support.Pass through big end support and axis
Lubricating grease is injected into the gap between bearing holder (housing, cover) and hollow shaft by the oil piping system on bearing sleeve, and sealing ring is by grease sealing
In gap between bearing holder (housing, cover) and hollow shaft, do not make lubricating grease to loss on the right side of the structure.Existing structure centre bearer bush endoporus
For left and right rotation direction perforation helical oil groove, sealing ring is that lip seals (its outer circle and big end support interference fit, endoporus lip and sky
Mandrel small―gap suture coordinates).In actual use, since system temperature increases, lubricating grease viscosity reduces, and increases lubricating grease
Mobility, lubricating grease is easy to be lost in by gap between sealing ring and hollow shaft, keeps lubricating grease retention time short, reduce
The lubricant effect of lubricating grease needs frequent maintenance down, greatly reduces the service efficiency of decanter centrifuge.
Utility model content
Purpose of the utility model is to overcome the shortcomings of the above technology, and to provide a kind of decanter centrifuge screw spindles
Sliding bearing sealing structure both can drive lubricating grease to be flowed to bearing holder (housing, cover) center in hollow shaft rotary course by helicla flute
It is dynamic, and can stop that lubricating grease is lost in outward.
The utility model to achieve the above object, using following technical scheme：A kind of cunning of decanter centrifuge screw spindle
Dynamic bearing sealing structure, including the support of bearing holder (housing, cover), sealing ring, big end and hollow shaft, it is characterized in that：The hole of the bearing holder (housing, cover) endoporus
On wall on the basis of the center line of its total length, it is arranged oppositely left and right rotation helicla flute, close to the left-turn spiral slot rotation direction of sealing ring
Identical as hollow shaft direction of rotation, the right hand helix slot rotation direction far from sealing ring is with hollow shaft direction of rotation on the contrary, on bearing holder (housing, cover)
Oil filler point equipped with several and the perforation of left-right rotary helicla flute.
The bearing holder (housing, cover) two-port is respectively equipped with the annulus groove being connected with left and right rotation helicla flute, annulus groove and oiling
Hole is connected to.
The sealing ring endoporus is interference fitted with hollow shaft, and sealing ring outer circle coordinates with big end supporting gap, the bearing
Set, sealing ring, big end support and hollow shaft constitute labyrinth seal structure.
Advantageous effect：Compared with prior art, the whole profit that the utility model opposite direction left-and-right spiral slot+labyrinth seal is constituted
Grease seal structure.It has effectively sealed the lubricating grease in bearing holder (housing, cover) up for safekeeping, has played the function of relatively long-term storage lubricating grease, extend
The function time of lubricating grease, reduce the frequency of grease up, save maintenance downtime, greatly improves the life of machine
Produce efficiency.
Description of the drawings
Fig. 1 is the structural scheme of mechanism of bearing holder (housing, cover)；
Fig. 2 is the structural schematic diagram of labyrinth seal structure；
Fig. 3 is the local general assembly schematic diagram of the utility model；
Fig. 4 is the local general assembly schematic diagram of the prior art.
In figure：1, bearing holder (housing, cover), 2, sealing ring, 3, big end support, 4, hollow shaft, 5,6, left and right rotation helicla flute, 7, oiling
Hole, 8, annulus groove.
Specific implementation mode
Specific embodiment of the present utility model is described in detail with reference to preferred embodiment.
Attached drawing is referred to, a kind of sliding bearing sealing structure of decanter centrifuge screw spindle is present embodiments provided, including
Bearing holder (housing, cover) 1, sealing ring 2, big end support 3 and hollow shaft 4 are with the center line of its total length on the hole wall of the bearing holder (housing, cover) endoporus
Benchmark is arranged oppositely left and right rotation helicla flute 5,6, and the left-turn spiral slot rotation direction close to sealing ring is identical as hollow shaft direction of rotation,
Right hand helix slot rotation direction far from sealing ring is opposite with hollow shaft direction of rotation.In hollow shaft rotary course, by hollow shaft outside
Circular surfaces drive lubricating grease to bearing holder (housing, cover) center flow by helicla flute.Bearing holder (housing, cover) is equipped with the note penetrated through with left-right rotary helicla flute
Oilhole 7.
The preferred embodiment of the present embodiment is that the bearing holder (housing, cover) two-port is respectively equipped with the circle being connected with left and right rotation helicla flute
Circular groove slot 8, annulus groove are connected to oil filler point.
The preferred embodiment of the present embodiment is that the sealing ring endoporus is interference fitted with hollow shaft, sealing ring outer circle and big end
Supporting gap coordinates, and the bearing holder (housing, cover), sealing ring, big end support and hollow shaft constitute labyrinth seal structure, stop lubricating grease
It is lost in the right end of the structure.
Design principle
Reasonable clearance between sliding bearing and axis can form the lubricating oil film condition with certain rigidity, utilize sliding axle
It holds the oilhole of design, in the reasonable clearance that lubricant grease is injected between sliding bearing and axis by oil groove, forms lubricating oil film.
It works to ensure that lubricating oil film is permanently effective, it is necessary to lubricant grease is enclosed in reasonable clearance, utilize small―gap suture labyrinth
Sealing principle is cooperated by sealing ring and hollow shaft, big end support and can be played the effect of labyrinth seal.
The course of work
Before screw spindle work, by oil filler point grease up, lubricating grease is supported by big end, is identical on bearing holder (housing, cover)
Oilhole and sliding bearing helicla flute enter in the gap between sliding bearing and axis, when screw spindle works, sliding bearing with
The lubricating oil film with certain rigidity plays lubricating action between axis, and under screw spindle turning effort, constantly drives lubrication
Center movement of the grease from bearing holder (housing, cover) both ends to bearing holder (housing, cover), the original lubricating grease in bearing holder (housing, cover) centre are pressed against bearing holder (housing, cover) both ends,
This process moves in circles to form effective lubricating oil film, plays the role of screw spindle sliding bearing lubricating.To prevent lubricating grease outside
Effluent loses, and sealing ring is installed additional in bearing holder (housing, cover) open sides, supports that complement each other to form labyrinth close by sealing ring and hollow shaft, big end
Envelope effectively limits lubricant grease and opens laterally outside loss from bearing holder (housing, cover), and such structural system forms reliably screw spindle
Operating condition.
It is above-mentioned a kind of sliding bearing sealing structure of the decanter centrifuge screw spindle is carried out with reference to embodiment it is detailed
Description is illustrative without being restrictive, several embodiments can be enumerated according to limited range, therefore do not departing from
Change and modification under the utility model general plotting should belong within the scope of protection of the utility model.
Claims (3)
1. a kind of sliding bearing sealing structure of decanter centrifuge screw spindle, including the support of bearing holder (housing, cover), sealing ring, big end and sky
Mandrel, it is characterized in that：On the hole wall of the bearing holder (housing, cover) endoporus on the basis of the center line of its total length, it is arranged oppositely left and right rotation
Helicla flute, the left-turn spiral slot rotation direction close to sealing ring is identical as hollow shaft direction of rotation, the right hand helix slot far from sealing ring
Rotation direction is with hollow shaft direction of rotation on the contrary, bearing holder (housing, cover) is equipped with the oil filler point of several and the perforation of left-right rotary helicla flute.
2. the sliding bearing sealing structure of decanter centrifuge screw spindle according to claim 1, it is characterized in that：The axis
Bearing sleeve two-port is respectively equipped with the annulus groove being connected with left and right rotation helicla flute, and annulus groove is connected to oil filler point.
3. the sliding bearing sealing structure of decanter centrifuge screw spindle according to claim 1, it is characterized in that：It is described close
Seal ring endoporus is interference fitted with hollow shaft, and sealing ring outer circle coordinates with big end supporting gap, the bearing holder (housing, cover), sealing ring, big end
Support and hollow shaft constitute labyrinth seal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721809964.6U CN207975145U (en) | 2017-12-22 | 2017-12-22 | The sliding bearing sealing structure of decanter centrifuge screw spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721809964.6U CN207975145U (en) | 2017-12-22 | 2017-12-22 | The sliding bearing sealing structure of decanter centrifuge screw spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207975145U true CN207975145U (en) | 2018-10-16 |
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ID=63771784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721809964.6U Active CN207975145U (en) | 2017-12-22 | 2017-12-22 | The sliding bearing sealing structure of decanter centrifuge screw spindle |
Country Status (1)
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| CN (1) | CN207975145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956802A (en) * | 2017-12-22 | 2018-04-24 | 天津辅然分离机械有限公司 | The sliding bearing sealing structure of decanter centrifuge screw spindle |
-
2017
- 2017-12-22 CN CN201721809964.6U patent/CN207975145U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956802A (en) * | 2017-12-22 | 2018-04-24 | 天津辅然分离机械有限公司 | The sliding bearing sealing structure of decanter centrifuge screw spindle |
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