CN203585116U - Rotating sealing device for farm machinery - Google Patents
Rotating sealing device for farm machinery Download PDFInfo
- Publication number
- CN203585116U CN203585116U CN201320751308.0U CN201320751308U CN203585116U CN 203585116 U CN203585116 U CN 203585116U CN 201320751308 U CN201320751308 U CN 201320751308U CN 203585116 U CN203585116 U CN 203585116U
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- Prior art keywords
- bearing
- pressure
- pole shoe
- sealing device
- ring
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a rotating sealing device for farm machinery. The rotating sealing device is provided with a shell, wherein the shell covers a main shaft on the outer end of a bearing, the shell is sequentially provided with an O-shaped seal ring, a pressure balance cavity, an inner pole shoe, a permanent magnetic ring, a magnetic isolation retainer ring, an outer pole shoe and a sealing end cover from inside to outside, the outer surface of the main shaft covered by the inner pole shoe, the magnetic isolation retainer ring and the outer pole shoe is provided with a plurality of toothed grooves, and magnetic fluid is filled in each toothed groove; the center of the main shaft is provided with a compressed gas inlet hole which is communicated with the pressure balance cavity; the outer circumferential surface of each of the inner pole shoe and the outer pole shoe is provided with the seal ring; the shell is provided with a flange; the compressed gas inlet hole on the center of the main shaft is connected with a pressure adjuster; the sealing end cover is provided with a pressure sensor. The rotating sealing device is suitable for sealing a farm machinery bearing, complete in structure and capable of reducing the failure of the bearing and prolonging the service life of the bearing.
Description
Technical field
The utility model relates to a kind of machinery technology, and specifically a kind of seal arrangement of rotation position of machinery, is specially adapted to farm machinery, as the sealing of the farm machinery bearing moving in the sealing of combine harvester caterpillar supporting wheel bearing, some muddy water environment.This device can reduce the solid barrier of bearing, improves the working life of bearing.
Background technique
At present, the operation because farm machinery is mainly used in the open, in earth, humidity or paddy field, Environmental Conditions is severe, the bearing at its rotation position is subject to the corrosion of material friction and environment, easily cause bearing seal to lose efficacy, bearing fault takes place frequently, and reduces bearing working life.Now existing is wherein mechanical structure much about the device of bearing seal mostly, has also occurred the seal arrangement of many use magnetic fluids.Magneticfluid Seal Technique is to develop on the basis of magnetic fluid, and when magnetic fluid injects the gap in magnetic field, it can be full of whole gap, forms a kind of " semi-solid O RunddichtringO ".Simple magnet fluid sealing anti-pressure ability is limited, and especially, when farm machinery falls into into moorland, the extruding of mud can produce instantaneous pressure, forces mud to enter in bearing housing, and the life-span of bearing is brought to fatal impact.Traditional oil sealing is not enough to stop the extruding of mud, thereby can cause bearing to lose efficacy at short notice.Although more existing correlation techniques of using with magnet fluid sealing in prior art,, device of the prior art is not protected and does not design for farm machinery whirligig, can not directly apply to farm machinery.Therefore, still there is no so far a correlation technique for solving farm machinery bearing at the wear problem of slurry environment.Therefore, need to improve existing Magnetofluid shaft bearing sealing device, make its sealing effect better, in the working life of further improving bearing, be applicable to better the sealing of farm machinery bearing.
Model utility content
The purpose of this utility model is to solve the problems of the technologies described above, a kind of rotating sealing device of farm machinery is proposed, this device is used for farm machinery by magnetic fluid rotary seal technology, with a pressure balance chamber and magnetic fluid seal, be used in combination, the compressive sealed ability of magnetic fluid seal is doubled.Effectively improve the working life of bearing, greatly reduce the bearing fault of even eliminating farm machinery.
For this purpose, the technical solution adopted in the utility model is: a kind of rotating sealing device of farm machinery, be provided with the shell of the seal arrangement that shape size and bearing end cover match, this casing is in the main shaft outer end in bearing outside, it is characterized in that: on the main shaft that described shell covers, from inside to outside, namely by bearing one side direction, be provided with outward and be sequentially enclosed within on main shaft: O RunddichtringO, annular cavity pressure balance chamber, the interior pole shoe that ring permeability magnetic material is made, permanent magnet ring and be enclosed within that the NULL of permanent magnet ring inner side makes every magnetic baffle ring, outer pole shoe and end cover that ring permeability magnetic material is made, at described interior pole shoe, every magnetic baffle ring, on the outerface of spindle that outer pole shoe covers, be provided with several ring teeth groove, in this teeth groove, be filled with magnetic fluid, the described alignment of shafts has pressurized gas inlet hole, and this inlet hole is communicated with described pressure balance chamber.
The utility model further improves and the additional project of enforcement is:
Between the outer circumferential face of described inside and outside pole shoe and the shell inner peripheral surface of seal arrangement, be respectively equipped with seal ring.
Described shell is provided with flange plate, by this flange plate, shell is connected with bearing exterior part.
The pressurized gas inlet hole of the described alignment of shafts is connected with a pressure regulator, and this pressure regulator is for regulating the pressure of pressurized gas, thus the pressure of adjusting pressure balance chamber.
On described end cover, be provided with pressure transducer, this pressure transducer and described pressure regulator carry out signal and control connection.This pressure transducer can be promptly by the pressure conduction in bearing outside to pressure regulator, and promptly adjust the pressure in pressure balance chamber.
Described main shaft pressurized gas inlet hole enters for pressurized gas.O RunddichtringO on main shaft seals the air inlet of pressure balance chamber, is convenient to stores compression gas, the pressure that balance comes from the outside.Pressurized gas is injected in pressure balance chamber by pressurized gas inlet hole, the gas pressure of pressure balance chamber is controlled at the degree of pressure suitable with the pressurized abrasion material of its device for sealing magnetic fluid one side in opposite directions, pressure balance chamber can make device for sealing magnetic fluid can be used in positive pressure environment, the positive pressure that counteracting comes from the outside, the injury that can effectively stop pressurized abrasion object to cause bearing.The pressure that pressure transducer can promptly conduct bearing outside is set on end cover, and promptly adjusts the pressure of pressure balance chamber.It is to be noted, pressure in pressure balance chamber, can be according to actual working environment, from zero, to it, can bear within the scope of maximum pressure and regulate, pressure balance chamber and device for sealing magnetic fluid are used simultaneously, build gas, liquid, abrasive particle thing etc. in an external environment condition and enter the obstacle of seal arrangement, thereby effectively prevent bearing wear, improve the working life of bearing.
During installation, seal arrangement of the present utility model is placed in to bearing and an extraneous adjacent side, by flange plate, through bolt and outside other parts of bearing, is connected, not only play magnet fluid sealing effect but also can be used as bearing (ball) cover use, improved assembling interchangeability.
Advantage of the present utility model: rotating sealing device of the present utility model is on traditional magnet fluid sealing basis, according to the feature of farm machinery, Magneticfluid Seal Technique is combined with pressure balance chamber, designed pressure balance chamber, play the effect of two aspects: first, bearing is sealed, play seal action; The second, while preventing that farm machinery from falling into into moorland, the extruding of mud can produce instantaneous pressure forces mud to enter in bearing housing, and the life-span of bearing is brought to fatal impact.Stop pressurized abrasion thing to enter in bearing unit, prevent abnormal bearing wear, can under pressurized is denuded substance environment, work, effectively improved the working life of bearing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the overall structure schematic diagram of the utility model together with bearing assemble.
Profile of the present utility model is not subject to the restriction of this figure, and only the change of profile also belongs among the protection domain of this patent.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described: embodiment: referring to accompanying drawing, a kind of rotating sealing device of farm machinery, be provided with the shell 7 of the seal arrangement that shape size and bearing end cover match, this casing is in the main shaft outer end in bearing 13 outsides, on the main shaft 12 that described shell covers, from inside to outside, namely by bearing one side direction, be provided with outward and be sequentially enclosed within on main shaft: O RunddichtringO 10, annular cavity pressure balance chamber 9, the interior pole shoe 41 that ring permeability magnetic material is made, permanent magnet ring 5 and be enclosed within that the NULL of permanent magnet ring inner side makes every magnetic baffle ring 8, the outer pole shoe 4 that ring permeability magnetic material is made and end cover 3, at described interior pole shoe, every magnetic baffle ring, on the outerface of spindle that outer pole shoe covers, be provided with several ring teeth groove 1, in this teeth groove, be filled with magnetic fluid 2, the described alignment of shafts has pressurized gas inlet hole 11, and this inlet hole is communicated with described pressure balance chamber.Between the outer circumferential face of described inside and outside pole shoe and the shell inner peripheral surface of seal arrangement, be respectively equipped with seal ring 6,61.Described shell is provided with flange plate, by this flange plate 71, shell is connected with bearing exterior part 14.The pressurized gas inlet hole of the described alignment of shafts is connected with a pressure regulator, and this pressure regulator is for regulating the pressure of pressurized gas, thus the pressure regulator of adjusting pressure balance cavity pressure.On described end cover, be provided with pressure transducer, this pressure transducer and described pressure regulator carry out signal and control connection.
Test experience to the present embodiment: two groups of existing experimental setups, use plain bearing seal arrangement for one group, one group of rotating sealing device by the utility model embodiment.Two groups of devices are linked together with the sealing wet part that produces fluid pressure respectively, in bearing outside, set certain hydraulic pressure, apply power and make main shaft rotation, continuous operation 8 hours, the variation in water pressure of two groups of bearing outsides of measurement, test result is:
With the hydraulic pressure of plain bearing seal arrangement, reduce 2MPa, with the hydraulic pressure of rotating sealing device, reduce 0.3MPa.So the sealability of this model utility embodiment's rotating sealing device is obviously better than plain bearing seal arrangement.
It should be pointed out that in the situation that not changing the utility model basic structure, can also make some similar changes, these changes also should be within the protection domain of this patent.
Claims (5)
1. the rotating sealing device of a farm machinery, be provided with the shell (7) of the seal arrangement that shape size and bearing end cover match, this casing is in the main shaft outer end in bearing (13) outside, it is characterized in that: on the main shaft (12) that described shell covers, from inside to outside, namely by bearing one side direction, be provided with outward and be sequentially enclosed within on main shaft: O RunddichtringO (10), annular cavity pressure balance chamber (9), the interior pole shoe (41) that ring permeability magnetic material is made, permanent magnet ring (5) and be enclosed within that the NULL of permanent magnet ring inner side makes every magnetic baffle ring (8), the outer pole shoe (4) that ring permeability magnetic material is made and end cover (3), at described interior pole shoe, every magnetic baffle ring, on the outerface of spindle that outer pole shoe covers, be provided with several ring teeth groove (1), in this teeth groove, be filled with magnetic fluid (2), the described alignment of shafts has pressurized gas inlet hole (11), and this inlet hole is communicated with described pressure balance chamber.
2. rotating sealing device according to claim 1, is characterized in that: between the outer circumferential face of described inside and outside pole shoe and the shell inner peripheral surface of seal arrangement, be respectively equipped with seal ring (6,61).
3. rotating sealing device according to claim 1, is characterized in that: described shell is provided with flange plate, by this flange plate (71), shell is connected with bearing exterior part (14).
4. rotating sealing device according to claim 1, it is characterized in that: the pressurized gas inlet hole of the described alignment of shafts is connected with a pressure regulator, this pressure regulator is for regulating the pressure of pressurized gas, thus the pressure regulator of adjusting pressure balance cavity pressure.
5. rotating sealing device according to claim 1, is characterized in that: on described end cover, be provided with pressure transducer, this pressure transducer and described pressure regulator carry out signal and control connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751308.0U CN203585116U (en) | 2013-08-16 | 2013-11-26 | Rotating sealing device for farm machinery |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320508915 | 2013-08-16 | ||
| CN201320508915.4 | 2013-08-16 | ||
| CN201320751308.0U CN203585116U (en) | 2013-08-16 | 2013-11-26 | Rotating sealing device for farm machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203585116U true CN203585116U (en) | 2014-05-07 |
Family
ID=50583046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320751308.0U Withdrawn - After Issue CN203585116U (en) | 2013-08-16 | 2013-11-26 | Rotating sealing device for farm machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203585116U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591148A (en) * | 2013-08-16 | 2014-02-19 | 天才诺尔顿精密机械(北京)有限公司 | Rotary seal device of farm machinery |
| CN104482177A (en) * | 2014-11-14 | 2015-04-01 | 常州大学 | Novel reducer outrigger shaft seal |
-
2013
- 2013-11-26 CN CN201320751308.0U patent/CN203585116U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591148A (en) * | 2013-08-16 | 2014-02-19 | 天才诺尔顿精密机械(北京)有限公司 | Rotary seal device of farm machinery |
| CN103591148B (en) * | 2013-08-16 | 2016-02-24 | 天才诺尔顿精密机械(北京)有限公司 | A kind of rotating sealing device of farm machinery |
| CN104482177A (en) * | 2014-11-14 | 2015-04-01 | 常州大学 | Novel reducer outrigger shaft seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20160224 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |