CN211820745U - Precision machinery rotating sealing device - Google Patents
Precision machinery rotating sealing device Download PDFInfo
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- CN211820745U CN211820745U CN201922316755.3U CN201922316755U CN211820745U CN 211820745 U CN211820745 U CN 211820745U CN 201922316755 U CN201922316755 U CN 201922316755U CN 211820745 U CN211820745 U CN 211820745U
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Abstract
The utility model relates to an accurate machinery rotates sealing device, this accurate machinery rotates sealing device, including rotator, the fixed body and seal structure, seal structure includes the quiet ring of magnetic conduction, magnetic conduction rotating ring, sealing washer five and labyrinth ring, the quiet ring cover of magnetic conduction is established and is installed in the fixed body periphery, the magnetic conduction rotating ring with the quiet ring phase-match of magnetic conduction, the upper end of magnetic conduction rotating ring is passed through sealing washer five and is installed together with the rotator, the fixed body passes through labyrinth ring with the magnetic conduction rotating ring lower extreme and seals, the magnetic conduction quiet ring with fill the magnetic fluid between the magnetic conduction rotating ring. The utility model provides an accurate machinery rotates sealing device has good gas tightness, less gyration resistance, better electromagnetic compatibility, wearing and tearing are minimum, the life-span is extremely long, the maintenance is convenient, but wide application in shipboard, machine carries, on-vehicle and land-based photoelectricity brick tower or has the mechanical equipment of approximate demand.
Description
Technical Field
The utility model relates to an accurate mechanical rotary seal device, the device specially adapted rotary shaft system change the sound, move the connection between the piece, concretely relates to photoelectricity capstan head rotary seal structure.
Background
In the working process of the photoelectric equipment with the precise rotating shaft system, the full-airspace precise observation is realized by the rotation of the shaft system. The warning and tracking capabilities of the photoelectric turret are closely related to the structural characteristics of the self shafting, and besides the rotating precision and rigidity of the rotating shafting have influence on the turret performance, the rotating sealing effect of the rotating shafting also has influence on the comprehensive performance of the brick tower, such as rotating resistance moment, electromagnetic compatibility, sealing performance and the like.
The rotary seal of the peripheral structure of the photoelectric turret shaft system mostly adopts a packing type contact seal type, for example, in the patent with the publication number of CN102022541A and the patent name of 'a ship-borne photoelectric equipment rotary dynamic seal device', the rotary seal is realized by adopting a mode that a seal ring is expanded in a labyrinth seal ring, the seal has larger shafting rotary resistance moment due to the mechanical extrusion of an elastic seal ring, and can effectively prevent water and dust, but when the airtightness is required to be maintained, the rotary seal needs to adopt special measures, and the use and maintenance conditions of the rotary seal are limited, for example, in the patent with the publication number of CN107575579A and the patent name of 'a composite rotary seal structure of a panoramic photoelectric observing and aiming equipment', the seal is realized by adopting a mode that a polytetrafluoroethylene sheet extrudes a U-shaped seal ring, and although the polytetrafluoroethylene has low-friction self-lubricating property, a part of friction resistance can be reduced, however, the wear resistance of the material is insufficient, the mechanical strength is poor, the service life of the rotary seal is affected, meanwhile, the thermal expansion coefficient of the polytetrafluoroethylene is large, the compression effect is reduced under the long-term temperature change circulation effect, once the seal fails, the connection of two ends of a shaft system needs to be disconnected in maintenance, and the directivity of the optical axis is affected.
On the other hand, in the prior art, a small gap exists between the static ring and the dynamic ring of the rotary seal, which may cause electromagnetic leakage inside the photoelectric turret or be affected by external electromagnetic radiation, so that the photoelectric turret may not adapt to increasingly violent electronic battlefield.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide a new precision machinery rotary seal device, the device has good gas tightness, less gyration resistance, better electromagnetic compatibility, wearing and tearing minimum, the life-span is extremely long, the maintenance is convenient, but wide application in shipboard, machine carries, on-vehicle and land-based photoelectricity brick tower or has the mechanical equipment of approximate demand.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
the utility model provides an accurate machinery rotates sealing device, includes rotator, the fixed body and seal structure, seal structure includes that the quiet ring of magnetic conduction, magnetic conduction rotating ring, sealing washer five and labyrinth ring, the quiet ring cover of magnetic conduction is established and is installed in the fixed body periphery, the magnetic conduction rotating ring with the quiet ring phase-match of magnetic conduction, the upper end of magnetic conduction rotating ring is passed through sealing washer five and is installed with the rotator together, the fixed body passes through labyrinth ring seal with the magnetic conduction rotating ring lower extreme, the quiet ring of magnetic conduction with pack the magnetic fluid between the magnetic conduction rotating ring.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Specifically, the rotating body comprises a sensor cover and an axial end flange which are fixed together in a sealing mode, and the axial end flange is fixedly connected with the rotating shaft; the fixed body comprises a shafting fixed seat, and the rotating shaft and the shafting fixed seat are relatively positioned through a bearing I.
And a first sealing ring is arranged at the connecting surface of the sensor cover and the shaft end flange.
Preferably, the shaft end flange is of a hollow structure.
Preferably, a third sealing ring is arranged between the magnetic static ring and the outer peripheral wall of the fixing body.
Preferably, the two magnetic conduction static rings are arranged in parallel, and a magnetic ring is arranged between the two magnetic conduction static rings.
Preferably, a second sealing ring is arranged between the magnetic conduction moving ring and the labyrinth ring.
Preferably, tooth sockets are formed in the peripheral wall of the magnetic conduction static ring, a round hole is formed in the magnetic conduction moving ring, the round hole is right corresponding to the tooth sockets in the magnetic conduction static ring, and the round hole is sealed through a sealing ring IV.
Preferably, the maintenance cover plate is fixedly connected with the magnetic conductive movable ring, and the conductive sealing ring four is arranged on the matching surface of the maintenance cover plate.
Preferably, the fifth sealing ring is a conductive composite sealing ring.
The utility model provides an accurate mechanical rotary seal device has following beneficial technological effect:
(1) the rotary seal adopts contactless magnetic liquid seal, the resistance increased by the seal is mainly viscous resistance generated by stirring magnetic liquid by a rotating shaft, the photoelectric turret is typical low-rotating-speed mechanical equipment, the viscosity of the magnetic liquid is not large, and therefore, the rotary resistance moment of the rotary seal is extremely small;
(2) the magnetic liquid seal adopts liquid metal-based magnetic liquid, has good conductivity, and a proper amount of lubricating grease is filled in the small labyrinth seal gap, so that the electric conduction of the peripheral structure at the rotary seal position is ensured to the maximum extent, and the electromagnetic compatibility of the photoelectric turret is greatly improved;
(3) different from the traditional photoelectric turret shaft system, the shaft system is denatured along with the prolonging of service time due to the existence of a sealing ring with larger compression amount, and finally the resistance moment is reduced, so that the servo performance and the sealing performance of the photoelectric turret are influenced;
(4) the magnetic liquid seal has the characteristics of simple structure and long service life, loss in the using process mainly comes from evaporation of magnetic liquid (the performance can be obviously reduced only after years), once the loss of the magnetic liquid is found, the problem can be solved only by injecting new magnetic liquid into the magnetic guide ring liquid injection hole, and the maintenance is very convenient;
(5) the shaft end flange is of a hollow structure, so that the hollow part of the rotating shaft can be fully utilized to arrange optical elements or optical sensors, the arrangement space of an optical system is greatly expanded, and the photoelectric turret is greatly miniaturized and lightened.
The utility model provides an accurate machinery rotates sealing device has good gas tightness, less gyration resistance, better electromagnetic compatibility, wearing and tearing are minimum, the life-span is extremely long, the maintenance is convenient, but wide application in shipboard, machine carries, on-vehicle and land-based photoelectricity brick tower or has the mechanical equipment of approximate demand.
Drawings
Fig. 1 is a schematic structural view of the rotary sealing device of the present invention;
FIG. 2 is an enlarged view of a portion of I in FIG. 1;
FIG. 3 is an enlarged view of a portion of II of FIG. 1;
in the drawings, the components represented by the respective reference numerals are listed below:
the shafting protection device comprises a sensor cover 1, a first sealing ring 2, a first shaft end flange 3, a rotating shaft 4, an angular contact bearing 5, a magnetic conductive dynamic ring 6, a magnetic conductive static ring 7, a magnetic ring 8, a second sealing ring 9, a third sealing ring 10, a labyrinth ring 11, a fourth sealing ring 12, a maintenance cover plate 13, a fifth sealing ring 14 and a fixed seat 15.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a precision machinery rotary sealing device, including the rotator, the fixed body and seal structure, seal structure includes the quiet ring 7 of magnetic conduction, the magnetic conduction rotating ring 6, sealing washer five 14 and labyrinth ring 11, the quiet ring 7 of magnetic conduction is established and is installed in the fixed body periphery, specifically, can set up the recess on the fixed body periphery wall, the quiet ring 7 of magnetic conduction is installed in the recess, the static ring 7 phase-match of magnetic conduction rotating ring 6 and magnetic conduction, namely the quiet ring 7 of magnetic conduction is established in the outside of magnetic conduction rotating ring 6 cover, the upper end of magnetic conduction rotating ring 6 is passed through sealing washer five 14 and screw and is fixed together with the rotator installation, the fixed body passes through labyrinth ring 11 with the 6 lower extreme of magnetic conduction rotating ring and seals, labyrinth ring 11 and the coaxial arrangement of magnetic conduction rotating ring 6, pack the magnetic fluid between the quiet.
The utility model provides a precision machine rotary sealing device, including the labyrinth seal that comprises labyrinth ring 11, the static seal that five 14 of sealing washer constitute, the magnetic static ring 7 of magnetic conduction and the magnetic dynamic ring 6 of magnetic conduction and the magnetic liquid constitute are sealed, and rotary seal adopts contactless magnetic liquid to seal, and the resistance that this kind of sealed increase mainly stirs the viscous resistance that the magnetic liquid produced for the pivot, because the viscosity of magnetic liquid itself is not big, therefore, the gyration resistance moment of this kind of rotary seal is minimum; the magnetic liquid seal adopts liquid metal-based magnetic liquid, has good conductivity, and can fill a proper amount of lubricating grease in a small sealing gap of the labyrinth ring 11, so that the electric conduction of a peripheral structure at the rotary seal position can be ensured to the maximum extent, and the electromagnetic compatibility of the photoelectric turret is greatly improved; be different from traditional photoelectricity capstan head shafting because of there being the great sealing washer of decrement, the shafting can be because of the extension degeneration of sealing washer along with being on active service, leads to the resistance moment to diminish at last to influence the servo performance and the sealing performance of photoelectricity capstan head, rotary seal can guarantee for a long time that the gyration resistance moment is less and undulant, and then guarantee the stability of photoelectricity capstan head servo state, magnetic liquid seal has simple structure in addition, longe-lived characteristics, loss in the use mainly stems from the evaporation of magnetic liquid (need can lead to the showing decline of performance in several years), in case discover the magnetic liquid loss, only need to pour into new magnetic liquid into to the liquid hole of magnetic ring and can solve to the maintenance is extremely convenient.
In the embodiment, the rotating body comprises a sensor cover 1 and an axle end flange 3 which are fixed together in a sealing manner, specifically, the sensor cover 1 and the axle fixing seat 15 are statically connected together through screws, a conductive sealing ring I2 is arranged on the matching surface of the sensor cover and the axle fixing seat, and the axle end flange 3 and the rotating axle 4 are directly connected and fixed together through screws; the fixing body comprises a shafting fixing seat 15, the rotating shaft 4 and the shafting fixing seat 15 are relatively positioned through a bearing I5, and the labyrinth ring 15 and the shafting fixing seat 15 are directly statically connected through screws.
In this embodiment, the shaft end flange 3 and the sensor cover body 1 form a sensor sealing cavity, which must have an airtight performance, and the shaft end flange 3 may have a hollow structure for light passing and weight reduction because the outer layer structure of the rotary seal has an airtight performance. The structure can also utilize the hollow part of the rotating shaft 4 to arrange optical elements or optical sensors, thereby greatly expanding the arrangement space of an optical system and having great effects on the miniaturization and the light weight of the photoelectric turret.
In this embodiment, a third sealing ring 10 is disposed between the magnetic static ring 7 and the outer peripheral wall of the fixing body, and static sealing between the two is realized through the third sealing ring 10 to prevent air leakage of the inner layer of the rotary seal. The two magnetic static rings 7 can be arranged in parallel, and a magnetic ring 8 is arranged between the two magnetic static rings 7. The magnetic conductive movable ring 6, the magnetic conductive static ring 7 and the magnetic ring 8 form a magnetic conductive loop, magnetic liquid is filled in a gap between the magnetic conductive movable ring 6 and the magnetic conductive static ring 7, the magnetic conductive movable ring 6 and the magnetic conductive static ring 7 are made of 20Cr13 which has good corrosion resistance and magnetic conductivity, the magnetic ring 8 is made of high-temperature-resistant rare earth permanent magnet material neodymium iron boron, the nickel plating mode is adopted for corrosion prevention treatment, and the magnetic liquid filled between the magnetic conductive movable ring 6 and the magnetic conductive static ring 7 is liquid metal-based magnetic liquid which has good electric conductivity and thermal conductivity.
As shown in fig. 2, four circular holes with a diameter of 1mm are processed on the magnetic conductive movable ring 6, annular tooth grooves are formed in the circular holes in alignment with the outer peripheral wall of the magnetic conductive static ring 7, magnetic liquid is respectively delivered to the tooth grooves on the magnetic conductive static ring 7 through the circular holes by a pinhole injector, the circular holes are sealed by a sealing ring four 12, and the magnetic liquid can be automatically filled in a gap between a tooth crest on the magnetic conductive static ring 7 and the magnetic conductive movable ring 6 along a magnetic field under the action of a magnetic conductive loop.
In this embodiment, the precision mechanical rotary sealing device includes a maintenance cover plate 13, the maintenance cover plate 13 may be a rectangular block structure, the maintenance cover plate 13 is fixed on the magnetic conductive movable ring 6 by screws, and the conductive sealing ring four is installed on the matching surface of the maintenance cover plate.
In this embodiment, the first bearing 5 is an angular contact bearing, and the angular contact bearing 5 is a high-precision bearing, and can be arranged in pair with another high-precision bearing, so that the gap is eliminated after the bearing is pre-tightened to ensure the rotation precision and the shafting rigidity of the rotating shafting, and thus the uniform gap between the magnetic conductive dynamic ring 6 and the magnetic conductive static ring 7 which are sealed by the magnetic liquid is ensured.
As shown in fig. 3, before the shaft end flange 3 is sleeved on the rotating shaft 4, the bottom diameter of the sealing groove of the magnetic conductive rotating ring 6, the outer diameter of the labyrinth ring 11 and the section diameter of the second sealing ring 9 are measured, the trimming amount of the bottom diameter of the groove of the magnetic conductive rotating ring 6 is calculated, the compression amount of the second sealing ring 9 is approximate to 0, and a proper amount of conductive grease is coated on one circle of the labyrinth groove of the labyrinth ring 11. A second sealing ring 9 is arranged between the magnetic conduction moving ring 6 and the labyrinth ring 11, and specifically comprises: when a small amount of conductive lubricating grease is coated in the groove of the labyrinth ring 11 and the magnetic conduction movable ring 6 is installed, the groove bottom diameter of the sealing ring II 9 is cut off, so that the compression amount of the sealing ring II 9 is extremely small, the shaft system resistance moment is not obviously increased, the effects of rain prevention and dust prevention are achieved, and the rough erosion of external environment factors can be greatly resisted.
The static seal in the embodiment is mainly formed by connecting two parts without relative movement through screws, the matching surfaces of the connecting parts are subjected to conductive oxidation treatment, and the used first sealing ring 2, the used fourth sealing ring 12 and the used fifth sealing ring 14 are conductive composite sealing rings so as to ensure the conductivity of the whole outer layer structure.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a precision machinery rotates sealing device, includes rotator, the fixed body and seal structure, its characterized in that, seal structure includes magnetic conduction quiet ring (7), magnetic conduction rotating ring (6), five (14) of sealing washer and labyrinth ring (11), magnetic conduction quiet ring (7) cover is established and is installed in the fixed body periphery, magnetic conduction rotating ring (6) with magnetic conduction quiet ring (7) phase-match, the upper end of magnetic conduction rotating ring (6) is passed through five (14) of sealing washer and is installed together with the rotator, the fixed body passes through labyrinth ring (11) with magnetic conduction rotating ring (6) lower extreme and seals, magnetic conduction quiet ring (7) with pack the magnetic fluid between the magnetic conduction rotating ring (6).
2. A precision mechanical rotary seal device according to claim 1, wherein the rotary body comprises a sensor cover (1) and an axial end flange (3) which are sealed and fixed together, and the axial end flange (3) is fixedly connected with the rotary shaft (4); the fixed body comprises a shafting fixed seat (15), and the rotating shaft (4) and the shafting fixed seat (15) are relatively positioned through a bearing I (5).
3. A precision mechanical rotary seal device according to claim 2, wherein a first seal ring (2) is provided at the joint of the sensor housing (1) and the shaft end flange (3).
4. A precision mechanical rotary seal assembly according to claim 2 wherein the shaft end flange (3) is hollow.
5. A precision mechanical rotary seal device according to claim 1, wherein a third seal ring (10) is arranged between the magnetically conductive stationary ring (7) and the outer peripheral wall of the stationary body.
6. A precision mechanical rotary seal device according to claim 1, wherein two of said magnetically conductive stationary rings (7) are arranged in parallel, and a magnetic ring (8) is arranged between said two magnetically conductive stationary rings (7).
7. A precision mechanical rotary seal device according to claim 1, wherein a second seal ring (9) is arranged between the magnetically conductive rotating ring (6) and the labyrinth ring (11).
8. The precise mechanical rotary sealing device according to claim 1, wherein tooth grooves are formed in the outer peripheral wall of the magnetic static ring (7), circular holes are formed in the magnetic dynamic ring (6), the circular holes correspond to the tooth grooves in the magnetic static ring (7), and the circular holes are sealed through a sealing ring four (12).
9. A rotary seal assembly for precision machines according to claim 8 further comprising a maintenance cover plate (13), said maintenance cover plate (13) being fixedly connected to the magnetically conductive rotating ring (6), said electrically conductive seal ring being mounted at the mating surface thereof.
10. A precision mechanical rotary seal assembly according to claim 1 wherein said five seal rings (14) are all conductive composite seal rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922316755.3U CN211820745U (en) | 2019-12-21 | 2019-12-21 | Precision machinery rotating sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922316755.3U CN211820745U (en) | 2019-12-21 | 2019-12-21 | Precision machinery rotating sealing device |
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| Publication Number | Publication Date |
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| CN211820745U true CN211820745U (en) | 2020-10-30 |
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| CN201922316755.3U Active CN211820745U (en) | 2019-12-21 | 2019-12-21 | Precision machinery rotating sealing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696485A (en) * | 2020-12-25 | 2021-04-23 | 中国船舶重工集团公司第七0三研究所 | Non-contact combined seal for gearbox |
-
2019
- 2019-12-21 CN CN201922316755.3U patent/CN211820745U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696485A (en) * | 2020-12-25 | 2021-04-23 | 中国船舶重工集团公司第七0三研究所 | Non-contact combined seal for gearbox |
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