CN202001305U - Sealing device of roots fan spindle - Google Patents
Sealing device of roots fan spindle Download PDFInfo
- Publication number
- CN202001305U CN202001305U CN2011200204231U CN201120020423U CN202001305U CN 202001305 U CN202001305 U CN 202001305U CN 2011200204231 U CN2011200204231 U CN 2011200204231U CN 201120020423 U CN201120020423 U CN 201120020423U CN 202001305 U CN202001305 U CN 202001305U
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- CN
- China
- Prior art keywords
- oil
- spindle
- sealing device
- sealing
- gear
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- Expired - Fee Related
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Abstract
The utility model is an improvement on a sealing device of a roots fan spindle, which is characterized in that at least a loop fixed on the spindle and rotating along with the spindle is sealed and separated on the spindle. A sealing room for containing the rotating loop is communicated with a gear box with an oil leakage channel. The sealing ring is changed into a 'centrifugal disc', and a closed connecting channel is processed between the sealing room and the gear box, thereby enabling the blocked oil mist to return to the gear box and playing a role of blocking the axial oil leakage. Secondly, the 'sealing device' does not perform relative motion with the spindle, thereby having no abrasion, guaranteeing long term usage without being damaged and having long service life. Furthermore, the sealing device is simple in structure, high in sealing reliability and low in manufacture cost. Because of not passing through the 'centrifugal disc', the oil can not enter a balanced hole all the time. Accordingly, the ground can not be polluted by the oil leakage, and the oil can not enter a fan cavity.
Description
Technical field
Model utility is to the improvement of roots blower rotating shaft sealing (oil sealing) device, relates in particular to a kind of long service life, and good reliability can be guaranteed the oil tight roots blower shaft sealing device of shaft sealing.
Background technique
Roots blower enters blower fan pollution conveying gas for cutting off external sync gear 3 lubricant oil, then is provided with lip seal circle (being commonly called as oil sealing) in block bearing 6; This external cause pump chamber entrance region is negative pressure state, outlet area is barotropic state, for preventing that lubricating oil enters the import negative pressuren zone by bearing and sealing in the gear-box 4, and avoid the gas of zone of positive pressure to enter gear-box, also on end cap 1, be provided with equalizing orifice 8, cut off thereby axially form two roads, wherein seal ring is a first line of defence.Its structure is: the blower fan pump chamber outside is followed successively by the end cap 1 of band equalizing orifice 8, cuts off shaft sealing, block bearing 6, gear-box 4 (accompanying drawing).
Yet because fricting movement is made in seal ring and rotating shaft for a long time, the seal ring lip is easy to wearing and tearing, causes the exclusion seal performance to reduce, and loses the oil removal effect, causes the axle head leakage of oil.While synchromesh gear engagement high speed rotating makes the temperature rise of the interior lubricating oil oil of gear-box, higher oily gentle high-speed gear rotate and makes lubricating oil at fuel tank top generation mist of oil.Cut off shaft sealing and damage (sealability reduction), make the interior mist of oil of gear-box pass through the seal into the end cap equalizing orifice, drip to befouling environment on the ground, blower fan outside after the part cooling, some mist of oil can be because of the negative pressure of roots blower entrance region, enter into the inner chamber of roots blower along the gap of axle and end cap, pollute conveying gas, cause and be entrained with mist of oil in the conveying gas.In addition, exclusion seal is leaked, and causes the interior mist of oil of gear-box to leak, and makes the interior lubricant oil of fuel tank to tail off, thereby needs running check to refuel, if carelessness gear-box inner oil shortage is arranged, then can cause the gear that runs up to damage because of unlubricated cooling.This defective long-term existence is also known its deficiency in the industry, because the compact structure of roots blower own, volume is little, because of the spatial position restriction, can not adopt baroque rotating shaft sealing again, therefore fail all the time to find effective solution, become the obstacle that industry is difficult to overcome.Above-mentioned deficiency still has is worth improved place.
Summary of the invention
The model utility purpose is to overcome above-mentioned the deficiencies in the prior art, provides a kind of simple in structure, long service life, and good reliability can guarantee that shaft sealing cuts off the oil tight roots blower shaft sealing device of effect.
The model utility purpose realizes, the main improvement is the original seal ring of cancellation, one ring plate that rotates with the axis is set in the rotating shaft of need partition positions (closed chamber) to be replaced, on closed chamber, offer simultaneously the draining passage of a connection fuel tank, making gear-box overflow mist of oil gets rid of to periphery through the centrifugal action of this ring, return gear-box by the introducing of draining passage and form closed-circuit, thereby overcome the deficiencies in the prior art, realize the model utility purpose.Specifically, model utility roots blower shaft sealing device, comprise roots blower rotating shaft and exclusion seal, with and the gear-box in the outside, it is characterized in that exclusion seal is at least one ring plate that can rotate with the axis in the rotating shaft that is fixed in the rotating shaft, between the closed chamber that holds ring plate and gear-box the draining of connection passage is arranged.
Before the detailed description, the fundamental function and the effect that can reach invention makes a presentation earlier, so that those skilled in the art have one clearly to understand to this patent general plotting technological scheme.
Model utility is because employing replaces former Simmer ring (oil sealing) with axle high speed rotating ring plate (dish), blower fan axle high speed rotating radially produces powerful centrifugal force in ring plate, the mist of oil that gear-box produces gets rid of to the closed chamber periphery under this ring plate generation centrifugal action and is cooled to oil droplet, be back to gear-box by the draining passage that is communicated with gear-box, not only avoided mist of oil to enter the blower fan inner chamber and caused gas band oil by seal ring, and the leakage of oil water clock pollutes, and lubricant oil can keep not reducing for a long time, stopped the generation of oil-break accident.
The ring plate that is provided with in the model utility rotating shaft, mainly contain two effects, the one, axially stop mist of oil, the 2nd, by producing centrifugal force with the axle high speed rotating, get rid of mist of oil to the closed chamber periphery and be cooled to oil droplet, the oil that will be leaked by the draining passage that is communicated with gear-box is back to gear-box.Thereby play fine axial exclusion seal effect.The ring plate of different shape all has this function in theory, can both be employed.Wherein, adopt alternate two, have the centrifugal partition in two roads, better effects if.Centrifugal ring plate preferably adopt have non-rigidity, non-oil absorption material, for example oil resistant rubber can be guaranteed the effective oil removal under the various operating conditionss.
Model utility roots blower shaft sealing device, with respect to prior art, owing to changed the sealing thinking, to hold seal ring tightly and make " centrifugal pan " partition into, and between closed chamber and gear-box processing draining passage, make the mist of oil that is blocked return gear-box, thereby played the effect that cuts off oily axial leakage equally; Secondly, relative movement does not take place with axle in this " seal arrangement ", thereby not wearing and tearing, can guarantee that long-term use does not damage, working life is extremely long, the sealing reliability height, and simple in structure, only needing increases drain pan to original blower fan end cap, and other do not make any changes.Because oil can not crossed " centrifugal pan ", thereby does not advance equalizing orifice all the time, just can not pollute ground by water clock yet, and enter the blower fan inner chamber.Model utility roots blower shaft sealing device provides new approaches for this type of partition-type oil sealing.
Below in conjunction with an exemplary embodiment; model utility essence is further understood in exemplary illustration and help; but embodiment's detail only is for model utility is described; do not represent model utility design whole technological schemes down; therefore should not be construed as the total technological scheme of model utility is limited; some are In the view of the technician; the unsubstantiality that does not depart from the model utility design increases and/or change; for example change or replace, all truely use novel protected scope so that technical characteristics with same or similar technique effect is simple.
Description of drawings
Accompanying drawing is a model utility roots blower shaft sealing device structural representation.
Embodiment
Embodiment: referring to accompanying drawing, model utility roots blower shaft sealing device, in the rotating shaft 5 of end cap 1 closed chamber position (block bearing 6 inboards), tightly be with oil resistant rubber ring plate 2, closed chamber and 4 of gear-boxes that are placed with synchromesh gear 3 are processed with draining passage 7.
To those skilled in the art; under this patent design and specific embodiment enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; those of ordinary skills will recognize also can adopt additive method; or the substituting of known technology commonly used in the prior art; and the equivalence of feature changes or modification; mutual various combination between feature; for example the ring plate of centrifugal rotation has alternate two roads, and the change of material, or the like unsubstantiality change; can be employed equally; can both realize this patent representation function and effect, launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (3)
1. roots blower shaft sealing device, comprise roots blower rotating shaft and exclusion seal, with and the gear-box in the outside, it is characterized in that exclusion seal is at least one ring plate that can rotate with the axis in the rotating shaft that is fixed in the rotating shaft, between the closed chamber that holds ring plate and gear-box the draining of connection passage is arranged.
2. according to the described roots blower shaft sealing device of claim 1, it is characterized in that the ring plate that rotates with the axis has alternate two.
3. according to claim 1 or 2 described roots blower shaft sealing devices, it is characterized in that the ring plate that rotates with the axis is non-rigidity, non-oil absorption material piece.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011200204231U CN202001305U (en) | 2011-01-22 | 2011-01-22 | Sealing device of roots fan spindle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011200204231U CN202001305U (en) | 2011-01-22 | 2011-01-22 | Sealing device of roots fan spindle |
Publications (1)
Publication Number | Publication Date |
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CN202001305U true CN202001305U (en) | 2011-10-05 |
Family
ID=44704048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011200204231U Expired - Fee Related CN202001305U (en) | 2011-01-22 | 2011-01-22 | Sealing device of roots fan spindle |
Country Status (1)
Country | Link |
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CN (1) | CN202001305U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102797681A (en) * | 2012-08-04 | 2012-11-28 | 无锡宜友机电制造有限公司 | Single-stage high-speed sealing fin |
CN108678950A (en) * | 2018-07-23 | 2018-10-19 | 长沙理工大学 | A kind of Roots air blower |
CN109702906A (en) * | 2019-01-28 | 2019-05-03 | 江苏徐工工程机械研究院有限公司 | Two monitoring chambeies of cutting machine drive unit |
CN111502995A (en) * | 2019-09-29 | 2020-08-07 | 宁波市新炜流体科技有限公司 | Oil-free dry type screw compressor sealing assembly |
-
2011
- 2011-01-22 CN CN2011200204231U patent/CN202001305U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102797681A (en) * | 2012-08-04 | 2012-11-28 | 无锡宜友机电制造有限公司 | Single-stage high-speed sealing fin |
CN108678950A (en) * | 2018-07-23 | 2018-10-19 | 长沙理工大学 | A kind of Roots air blower |
CN108678950B (en) * | 2018-07-23 | 2019-08-30 | 长沙理工大学 | A Roots blower impeller |
CN109702906A (en) * | 2019-01-28 | 2019-05-03 | 江苏徐工工程机械研究院有限公司 | Two monitoring chambeies of cutting machine drive unit |
CN109702906B (en) * | 2019-01-28 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Cutting machine driving unit double-monitoring cavity |
CN111502995A (en) * | 2019-09-29 | 2020-08-07 | 宁波市新炜流体科技有限公司 | Oil-free dry type screw compressor sealing assembly |
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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: 20111005 Termination date: 20190122 |