CN208669860U - Ventilation blower thin oil lubricant bearing housing and its labyrinth seal structure - Google Patents
Ventilation blower thin oil lubricant bearing housing and its labyrinth seal structure Download PDFInfo
- Publication number
- CN208669860U CN208669860U CN201820802485.XU CN201820802485U CN208669860U CN 208669860 U CN208669860 U CN 208669860U CN 201820802485 U CN201820802485 U CN 201820802485U CN 208669860 U CN208669860 U CN 208669860U
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- CN
- China
- Prior art keywords
- bearing
- labyrinth seal
- seal structure
- side cover
- main shaft
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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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Abstract
The utility model provides a kind of ventilation blower thin oil lubricant bearing housing and its labyrinth seal structure, labyrinth seal structure includes the multiple rows of belt sealing tooth being circumferentially about arranged in bearing housing main shaft, a series of backlash and between cog cavity are formed between each belt sealing tooth, ventilation blower thin oil lubricant bearing housing includes labyrinth seal structure, it further include the bearing block of lower end, the bearing cap of upper end, it is connected between bearing block and bearing cap by bearing side cover, tapered roller bearing is mounted in the bearing hole that bearing block and bearing cap are formed, main shaft is inserted into the inner hole of tapered roller bearing, oil scraper ring is mounted on main shaft and is located in bearing side cover, the labyrinth seal structure is connect with bearing side cover；The utility model structure is simple, is easily worked, and sealing effect is splendid；A large amount of oil leaks caused by solving because of poor sealing, easy to maintain, reliable, environmental protection and energy saving reduce economic loss.
Description
Technical field
The utility model relates to ventilation equipment field, specifically a kind of labyrinth seal structure and containing this sealing knot
The ventilation blower thin oil lubricant bearing housing of structure.
Background technique
Thin oil lubricant bearing box oil leakage problem is problem common to those skilled in the art, the engineer of relevant industries all needles
Some effective solutions were proposed to specific oil leak situation, but seldom to bearing housing why oil leak and have detailed
Description.Accordingly, it needs to carry out some theoretic analyses to the common thin oil lubricant bearing box oil leakage problem of ventilation blower；In turn
The method for illustrating prevention bearing box oil leakage.
The centrifugal fan produced both at home and abroad at present largely uses roller bearings thin oil lubricant, Fan Bearing Box
Because sealing bad generation oil leakage phenomenon, fan user is used, maintenance is made troubles, but also pollutes ambient enviroment, when serious
It also will cause insufficient lubrication and burn bearing.To solve the problems, such as Fan Bearing Box oil leak this, it is necessary to fundamentally improve bearing
Case sealing structure.
The oil leak as caused by bad seals will cause lubricating oil and be largely lost, by 15 drop of loss per minute, every oil dripping diameter
4mm is calculated, the about 300L/ platform of oil leak in 1 year, 1 year direct losses, more than 3000 yuan/platform.If forming liquid stream, lose more.
Lubricating oil is laid among oil sump under conditions of main shaft is static, since fraction oil liquid flies after main shaft normal operation
Oil droplet or mist of oil are splashed into, some is attached on bearing and main shaft in the form of oil film, therefore main shaft and bearing housing side cover
Gap becomes the position of most easy oil leakage；Market generally uses oil scraper ring+bearing side cover+packing+gland to adjust compages and carries out
Sealing reaches sealing effect using oil scraper ring sealing, gear oil and packing fastening.But due on main shaft oil film and oil droplet due to master
The rotation of axis and assemble, and to bearing housing side cover infiltrate, if lubricating oil will be from main shaft and bearing housing side without effective safeguard procedures
The gap location of lid flows out.
Utility model content
In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide a kind of ventilation blower thin oil lubricants
The labyrinth seal structure of bearing housing.
To realize that above-mentioned purpose of utility model, the technical solution of the utility model are as follows:
A kind of labyrinth seal structure of ventilation blower thin oil lubricant bearing housing, is included in bearing housing main shaft and circumferentially about sets
The multiple rows of belt sealing tooth set forms a series of backlash and between cog cavity between each belt sealing tooth.
The utility model also provides a kind of ventilation blower thin oil lubricant bearing housing, including above-mentioned labyrinth seal structure, also
The bearing cap of bearing block, upper end including lower end, is connected between bearing block and bearing cap by bearing side cover, tapered roller bearing
It is mounted in the bearing hole that bearing block and bearing cap are formed, main shaft is inserted into the inner hole of tapered roller bearing, and oil scraper ring is mounted on
On main shaft and it is located in bearing side cover, the labyrinth seal structure is connect with bearing side cover.
It is preferred that the labyrinth seal structure is bolted with bearing side cover.
Utility model works principle is as follows:
Ideal labyrinth flow-path model is connected in series by annular backlash and between cog cavity one by one.Gas often passes through one
The flowing of a backlash and between cog cavity can be described as follows: in gap inlet, oil liquid is introduced into backlash；When enter cavity, flow velocity
Section sudden enlargement, and strong vortex is formed in cavity.From the point of view of energy viewpoint, before and after gap, the pressure energy of oil liquid
It is changed into kinetic energy.Meanwhile when temperature declines (heat enthalpy value h reduction), and oil liquid enters the annular cavity between two teeth with high speed, body
Expansion generates violent vortex to product suddenly.Eddy friction as a result, making most kinetic energy of oil liquid be changed into thermal energy, by chamber
Air-flow absorb and increase temperature, heat content is restored to again close into the value before gap, and only fraction kinetic energy is still with leaving velocity
Into next gap, so repeat the above process step by step.Therefore oil liquid kinetic energy gradually decreases, and in ideal labyrinth, oil liquid is false
Asymptotic velocity when arriving next sealing surely is equal to zero, therefore plays sealing function.
The utility model has the following beneficial effects: the utility model structure is simple, is easily worked, sealing effect is splendid；It solves
Because of a large amount of oil leaks caused by poor sealing, easy to maintain, reliable, environmental protection and energy saving, the oil leak meeting as caused by bad seals
It causes lubricating oil to be largely lost, is calculated by 15 drop of loss per minute, every oil dripping diameter 4mm, the about 300L/ platform of oil leak in 1 year, 1 year
More than 3000 yuan/platform of direct losses.But after using labyrinth type labyrinth structure instead, oil leakage loss per minute is theoretically 0 drop, subtracts within 1 year
Few oil leak 300L/ platform, reduces more than 3000 yuan/platform of economic loss.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the ventilation blower thin oil lubricant bearing housing of the utility model.
Fig. 2 is the labyrinth seal structure schematic diagram of the utility model.
Wherein, 1 is bearing cap, and 2 be oil sump, and 3 be tapered roller bearing, and 4 be oil scraper ring, and 5 be bearing block, and 6 be bearing side
Lid, 7 be labyrinth seal structure, and 8 be main shaft, and 9 be ring packing teeth.
Specific embodiment
Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition
Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer
With carrying out various modifications or alterations under the spirit without departing from the utility model.
As shown in Fig. 2, a kind of labyrinth seal structure of ventilation blower thin oil lubricant bearing housing, is included in bearing housing main shaft 8
The multiple rows of belt sealing tooth 9 being circumferentially about arranged forms a series of backlash and between cog cavity between each belt sealing tooth.
As shown in Figure 1, a kind of ventilation blower thin oil lubricant bearing housing, including above-mentioned labyrinth seal structure 7, under further including
The bearing block 5 at end, upper end bearing cap 1, connected between bearing block 5 and bearing cap 1 by bearing side cover 6, tapered roller bearing 3
It is mounted in the bearing hole that bearing block 5 and bearing cap 1 are formed, main shaft 8 is inserted into the inner hole of tapered roller bearing, and oil scraper ring 4 is pacified
On main shaft 8 and it is located in bearing side cover 6, the labyrinth seal structure 7 is bolted with bearing side cover 6.
Labyrinth seal is that several belt sealing teeth being arranged successively are set around shaft, is formed between tooth and tooth a series of
Shut off gap and expansion cavity, and sealed medium (oil) generates throttle effect when through the gap in tortuous labyrinth and reaches Drain Resistance
Purpose.
Fluid generates resistance by labyrinth and the function of its flow reduction is made to be known as " labyrinth effect ".To liquid, there is fluid
Mechanics effect grinds inhibition effect, a fluid stream blockage effect including waterpower；To gas, there are also thermomechanical effects, i.e., gas is in labyrinth
The middle hot-cast socket generated because compressing or expanding；In addition, there are also " ventilative effects " etc..And labyrinth effect is then these effects
Combined reaction.
Since, there are gap, no solid contact needn't lubricate, and allow to have between the rotor (main shaft) and casing of labyrinth seal
Thermal expansion adapts to high temperature, high pressure, the occasion of high speed-frequency.
The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, all those of ordinary skill in the art are without departing from the revealed spirit of the utility model
With all equivalent modifications completed under technical idea or change, should be covered by the claim of the utility model.
Claims (2)
1. a kind of ventilation blower thin oil lubricant bearing housing, it is characterised in that: further include lower end including labyrinth seal structure (7)
Bearing block (5), upper end bearing cap (1), connect between bearing block (5) and bearing cap (1) by bearing side cover (6), circular cone rolls
Sub- bearing (3) is mounted in the bearing hole that bearing block (5) and bearing cap (1) are formed, and main shaft (8) is inserted into the interior of tapered roller bearing
Kong Zhong, oil scraper ring (4) are mounted on main shaft (8) and are located in bearing side cover (6), the labyrinth seal structure (7) and bearing
Side cover (6) connection, what the labyrinth seal structure (7) was included in that bearing housing main shaft (8) is circumferentially about arranged multiple rows of goes in ring
It seals tooth (9), forms a series of backlash and between cog cavity between each belt sealing tooth.
2. ventilation blower thin oil lubricant bearing housing according to claim 1, it is characterised in that: the labyrinth seal structure
(7) it is bolted with bearing side cover (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802485.XU CN208669860U (en) | 2018-05-28 | 2018-05-28 | Ventilation blower thin oil lubricant bearing housing and its labyrinth seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802485.XU CN208669860U (en) | 2018-05-28 | 2018-05-28 | Ventilation blower thin oil lubricant bearing housing and its labyrinth seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208669860U true CN208669860U (en) | 2019-03-29 |
Family
ID=65823719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820802485.XU Expired - Fee Related CN208669860U (en) | 2018-05-28 | 2018-05-28 | Ventilation blower thin oil lubricant bearing housing and its labyrinth seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208669860U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594184A (en) * | 2020-12-16 | 2021-04-02 | 衢州市智能制造技术与装备研究院 | Main unit of aluminum alloy rotor oil-free screw compressor (Single stage) |
-
2018
- 2018-05-28 CN CN201820802485.XU patent/CN208669860U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594184A (en) * | 2020-12-16 | 2021-04-02 | 衢州市智能制造技术与装备研究院 | Main unit of aluminum alloy rotor oil-free screw compressor (Single stage) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190329 |