CN202674030U - Sealing device used for prolonging service life of bearing - Google Patents
Sealing device used for prolonging service life of bearing Download PDFInfo
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- CN202674030U CN202674030U CN 201220263923 CN201220263923U CN202674030U CN 202674030 U CN202674030 U CN 202674030U CN 201220263923 CN201220263923 CN 201220263923 CN 201220263923 U CN201220263923 U CN 201220263923U CN 202674030 U CN202674030 U CN 202674030U
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- seal
- bearing
- magnetic fluid
- hole
- running shaft
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Abstract
The utility model discloses a sealing device used for prolonging service life of a bearing. The sealing device used for prolonging the service life of the bearing comprises a magnetic fluid sealing part and a pressure balance chamber which is adaptive with the magnetic fluid sealing part. The magnetic fluid sealing part comprises a permanent magnet ring, a sealing part main body and a rotating shaft, wherein the outer surface of the sealing part main body is provided with threads. Magnetic fluid is arranged in the permanent magnet ring. The pressure balance chamber comprises a balance cavity body, wherein the balance cavity body comprises a sealing part main body adaptive hole, a rotating shaft through hole and a rotating shaft deriving hole. O-shaped ring grooves are arranged on connection places of the sealing part main body adaptive hole, the rotating shaft deriving hole and the rotating shaft through hole, wherein O-shaped rings are arranged in the O-shaped ring grooves. An air-compressed air inlet is arranged on the lateral surface of the pressure balance chamber. The sealing device can prevent pressed abrasion liquid from leaking from a pressure container to enter into the bearing, avoid the phenomenon that the pressed abrasion liquid abrades against the bearing, and prolong the service life of the bearing. Simultaneously, the utility model further discloses a usage method of the sealing device.
Description
Technical field
The utility model relates to a kind of seal arrangement for improving bearing life, and is especially a kind of for pressure mixer stirring shaft bearing is sealed, improves the seal arrangement in the working life of bearing.
Background technique
At present; the pressurized container stirrer that pressurized abrasion liquid is housed is generally used bearing seal; because pressure is larger in the pressurized container; liquid wherein often contains abrasion thing, pollutant, erosion etc.; therefore; these liquid often can enter owing to poorly sealed or wearing and tearing the bearing of stirrer, to bearing and related components injury, have greatly shortened the working life of bearing.
Magnetic fluid also claims magnetic liquid or ferrofluid (English is Magnetic Fluid or Ferrofluid), it is that the ferromagnetic nano particulate is incorporated in the carrier fluid, and it is distributed in the carrier fluid equably with the surface activity dispersing agent, thereby the semisolid of the mixed suspension of a kind of solid liquid phase that forms.Magneticfluid Seal Technique is to develop on the basis of magnetic fluid, and when magnetic fluid injected the gap in magnetic field, it can be full of whole gap, forms a kind of " semisolid O RunddichtringO ".The function of device for sealing magnetic fluid is to be delivered in the seal container rotatablely moving, and is usually used in vacuum seal.
Although in the prior art more existing with magnetic fluid bearing use relevant,, device of the prior art is not to design for stirring pressurized abrasion liquid, can not denude for pressurized the severe rugged environment of liquid.Therefore, so far, still do not have a technology to be used for solving pressurized abrasion liquid stirrer shaft and hold this problem of wearing and tearing.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art part and provides a kind of for being applied in specialized designs in bearing-magnet fluid sealing, the Effective Raise bearing seal arrangement in working life.
For achieving the above object, the technological scheme that the utility model is taked is: a kind of seal arrangement for improving bearing life, comprise magnetic fluid seal and with the suitable pressure equalizing chamber of described magnetic fluid seal; Described magnetic fluid seal comprises permanent magnet rings, be fixed on the seal body of permanent magnet rings one end, pass the running shaft in described permanent magnet rings and seal body axle center, be provided with magnetic fluid in the described permanent magnet rings, the outer surface of described seal body is provided with screw thread; Described pressure equalizing chamber comprises the counter balance pocket body, described counter balance pocket body interior is respectively equipped with seal body mating hole, running shaft through hole and running shaft leadout hole vertically, the internal surface of described seal body mating hole is provided with the screw thread suitable with the screw thread of described seal body outer surface, the joint of described seal body mating hole, running shaft leadout hole and running shaft through hole is equipped with O shape circle groove, in the described O shape circle groove O shape circle is installed, the side of described counter balance pocket body is provided with the pressurized air inlet hole.
In the described pressure equalizing chamber, the seal body mating hole that the counter balance pocket body interior arranges is used for suitable with described seal body, described pressure equalizing chamber can be fixed on the described seal body by suitable screw thread, and the running shaft through hole of counter balance pocket body interior and running shaft leadout hole are used for the running shaft of described magnetic fluid seal and pass described counter balance pocket body, described seal body mating hole, two O shape circle grooves that running shaft leadout hole and running shaft through hole joint arrange, be used for installing O shape circle, O shape circle all is installed at the two ends of running shaft through hole, thereby the running shaft through hole is sealed, be used for storing compressed air, balance comes from the pressure in the pressurized container.The pressurized air inlet hole of described pressure equalizing chamber side is used for compressed-air actuated entering.
Seal arrangement described in the utility model is for the inordinate wear that prevents pressurized to denude the main shaft bearing of liquid stirrer designs, and by being used of magnetic fluid seal and pressure equalizing chamber, is widely used for being similar in the environment of abrasion liquid stirrer.In the described seal arrangement, pressurized air is injected in the pressure equalizing chamber by the pressurized air inlet hole, the air pressure of pressure equalizing chamber is controlled in the degree of pressure suitable with the pressurized of its magnetic fluid seal one side in opposite directions abrasion liquid, that is to say with pressurized container in pressure be complementary.Pressure equalizing chamber can make magnetic fluid seal can be used in positive pressure environment, such as abrasion liquid stirrer, pressure pump, paint spraying stirrer, chemical reaction still, canvas gumming machine, under water slurry pump or running shaft etc.Described seal arrangement has been offset the positive pressure in the container, the injury that can effectively stop pressurized abrasion liquid that rotating shaft bearing is caused.
It is pointed out that described magnetic fluid seal itself can not be used for the rotation axis seal of pressurized abrasion liquid.Seal arrangement described in the utility model is custom-designed for being applied in bearing-magnet fluid sealing, magnetic fluid seal and pressure equalizing chamber are used in combination, set up the obstacle that a pressurized abrasion liquid penetrates magnetic fluid seal, thereby stop pressurized abrasion liquid to enter in the bearing of running shaft, effectively prevent bearing wear, improve the working life of bearing.When the medium that need to mix with liquid is the hard powder, set up such obstacle particular importance that seems, because this hard powder can make bearing because of the Fast Wearing premature failure.
As improvement of the technical scheme, described seal arrangement comprises one, the pressure equalizing chamber of two or more series connection.When the pressure in the pressurized container is larger, can come positive pressure in the offset pressure container by two or more pressure equalizing chambers of connecting.
As improvement of the technical scheme, described pressure equalizing chamber is cylindrical structural.
As improvement of the technical scheme, the counter balance pocket body one end outer surface of described pressure equalizing chamber is provided with the screw threads for fastening face for binding thread.End outer surface at the counter balance pocket body arranges the screw threads for fastening face, and described screw threads for fastening face makes things convenient for the fastening of screw thread in the position that threaded together is blocked as spanner constantly.
As improvement of the technical scheme, described O shape circle is polyurethane O shape circle.The general seal grease of described O shape circle recommendation Parker also can select the O shape of other types or producer to enclose, as long as realize the purpose of sealing certainly.
As improvement of the technical scheme, described seal body is provided with compensating groove for running shaft and O shape circle close contact away from an end of permanent magnet rings.If described compensating groove is not set on the described seal body, the plane of running shaft can't be installed on O shape circle groove in O shape circle directly contact, be unfavorable for compressed-air actuated sealing in the pressure equalizing chamber.
Simultaneously, the utility model also provides seal arrangement that a kind of employing be used for to improve bearing life as mentioned above to the method that pressurized container seals, and may further comprise the steps:
(1) permanent magnet rings of described magnetic fluid seal is placed pressurized container and be close to the inwall of described pressurized container; Perhaps the permanent magnet rings of magnetic fluid seal is placed the outside of pressurized container and be close to the outer wall of described pressurized container;
(2) first the screw thread of bearing by described seal body outer surface is fixed on the described seal body, and then with described pressure equalizing chamber by being fixed on the described seal body with the suitable seal body mating hole of seal body; Perhaps first described pressure equalizing chamber is fixed on the described seal body by the suitable seal body mating hole of described seal body, and then bearing is fixed on the top of described pressure equalizing chamber.
When seal arrangement described in the utility model uses, pressure equalizing chamber, bearing, the position of pressure vessel wall and magnetic fluid seal can change, for example, can be first place pressurized container to be close to the inwall of described pressurized container the permanent magnet rings of magnetic fluid seal, then the screw thread of bearing by described seal body outer surface is fixed on the described seal body, bearing is close to the outer wall of pressurized container, and then pressure equalizing chamber is fixed on the described seal body, the upper end of bearing is close in the lower end of pressure equalizing chamber, and this kind position relationship is followed successively by from bottom to up: magnetic fluid seal-pressure vessel wall-bearing-pressure balance chamber.Certainly, also can be according to being followed successively by from bottom to up magnetic fluid seal-pressure vessel wall-pressure equalizing chamber-bearing, perhaps pressure vessel wall-magnetic fluid seal-pressure equalizing chamber bearing, perhaps the position relationship of pressure vessel wall-magnetic fluid seal-bearing-pressure equalizing chamber is used in combination.In a word, this position relationship of pressure equalizing chamber, bearing, pressure vessel wall and magnetic fluid seal is flexible and changeable, is not abraded the purpose that liquid weares and teares as long as can reach sealed pressure abrasion liquid with protection bearing and magnetic fluid seal.
It may be noted that, in the less situation of running shaft load, bearing can, magnetic fluid seal can be used as bearing and uses.But, bearing at running shaft in the situation of larger load, bearing then must use.
Seal arrangement described in the utility model increases a pressure equalizing chamber suitable with it on traditional magnet fluid sealing basis, can work in the pressurized abrasion abrasion liquid.Adopt seal arrangement described in the utility model that pressurized in pressurized container abrasion liquid is sealed, stop pressurized abrasion liquid to enter in the bearing unit of running shaft, prevent unusual bearing wear, Effective Raise the working life of bearing.When adopting seal arrangement described in the utility model that the pressurized container that contains pressurized abrasion liquid is sealed, usage mode is flexible and changeable.
Description of drawings
Fig. 1 is a kind of embodiment's of seal arrangement described in the utility model structural representation.
Fig. 2 is a kind of embodiment's the structural representation of the magnetic fluid seal of seal arrangement described in the utility model.
Fig. 3 is a kind of embodiment's the structural representation of the pressure equalizing chamber of seal arrangement described in the utility model.
Fig. 4 is the structural representation of the another kind of line of vision of pressure equalizing chamber shown in Figure 3.
The position relationship schematic representation of Fig. 5 when to be that seal arrangement described in the utility model is a kind of use state.
Fig. 6 is a kind of structural representation that uses state of seal arrangement described in the utility model.
Among the figure, 10 is magnetic fluid seal, and 12 is permanent magnet rings, 14 is seal body, and 140 is screw thread, and 142 is compensating groove, 16 is running shaft, and 20 is pressure equalizing chamber, and 22 is the counter balance pocket body, 220 is the screw threads for fastening face, and 23 are O shape circle, and 24 is the seal body mating hole, 240 is screw thread, and 242 are O shape circle groove, and 26 is the running shaft through hole, 27 are O shape circle, 28 is the running shaft leadout hole, and 282 are O shape circle groove, and 29 is the pressurized air inlet hole, 30 is bearing, 32 is pad, and 40 is pressurized container, and 42 are pressurized abrasion liquid, 50 is motor, and 52 is coupling.
Embodiment
For the purpose of this utility model, technological scheme and advantage better are described, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
A kind of seal arrangement for improving bearing life, as shown in Figure 1, comprise magnetic fluid seal 10 and with the suitable pressure equalizing chamber 20 of described magnetic fluid seal 10; As shown in Figure 2, described magnetic fluid seal 10 comprises permanent magnet rings 12, be fixed on the seal body 14 of permanent magnet rings 12 1 ends, pass the running shaft 16 in described permanent magnet rings 12 and seal body 14 axle center, be provided with magnetic fluid (not shown in FIG.) in the described permanent magnet rings 12, the outer surface of described seal body 14 is provided with screw thread 140; Shown in accompanying drawing 3 and 4, described pressure equalizing chamber 20 comprises counter balance pocket body 22, described counter balance pocket body 22 inside are respectively equipped with seal body mating hole 24 vertically, running shaft through hole 26 and running shaft leadout hole 28, the internal surface of described seal body mating hole 24 is provided with the screw thread 240 suitable with the screw thread 140 of described seal body 14 outer surfaces, described seal body mating hole 24, running shaft leadout hole 28 is equipped with O shape circle groove (242 with the joint of running shaft through hole 26,282), described O shape circle groove (242,282) be separately installed with O shape circle (23 in, 27), the side of described counter balance pocket body 22 is provided with pressurized air inlet hole 29.
In the described pressure equalizing chamber 20, the inner seal body mating holes that arrange 24 of counter balance pocket body 22 are used for described seal body 14 suitable, by suitable screw thread (140,240) described pressure equalizing chamber 20 can be fixed on the described seal body 14, and the running shaft 16 that the running shaft through hole 26 of counter balance pocket body 22 inside and running shaft leadout hole 28 are used for described magnetic fluid seal 10 passes described counter balance pocket body 22, described seal body mating hole 24, running shaft leadout hole 28 encloses grooves (242 with two O shapes that running shaft through hole 26 joints arrange, 282), be used for installing O shape circle (23,27), O shape circle (23 all is installed at the two ends of running shaft through hole 26,27), thereby running shaft through hole 26 is sealed, be used for storing compressed air, balance comes from the pressure in the pressurized container.The pressurized air inlet hole 29 of described counter balance pocket body 22 sides is used for compressed-air actuated entering.
Shown in accompanying drawing 5 and 6, described seal arrangement is to design for the inordinate wear that prevents pressurized to denude the main shaft bearing 30 of liquid 42 stirrers, by being used of magnetic fluid seal 10 and pressure equalizing chamber 20, be widely used for being similar in the environment of abrasion liquid stirrer.The effect of pressure equalizing chamber 20 is that balance comes from pressure in the pressurized container 40 (such as the container of spray paint in seal arrangement, coating media must use a rotating spoon fully to mix with powder), thereby for the running shaft 16 that is inserted in the pressurized container 40 provides tight seal, strengthen the sealability of magnetic fluid seal 10, can be used for the environment of pressurized abrasion liquid; The Main Function of magnetic fluid seal 10 is to form an isolation zone, stops pressurized abrasion liquid 42 to leak from pressurized container and enters bearing 30.In the described seal arrangement, pressurized air is injected in the pressure equalizing chamber 20 by pressurized air inlet hole 29, the air pressure of pressure equalizing chamber 20 is controlled in the degree of pressure suitable with the pressurized of its magnetic fluid seal 10 1 sides in opposite directions abrasion liquid 42, that is to say with pressurized container 40 in pressure be complementary.Pressure equalizing chamber 20 can make magnetic fluid seal 10 can be used in positive pressure environment, such as abrasion liquid stirrer, pressure pump, paint spraying stirrer, chemical reaction still, canvas gumming machine, under water slurry pump or running shaft etc.Described seal arrangement has been offset the positive pressure in the pressurized container 40, the injury that can effectively stop 42 pairs of running shafts of pressurized abrasion liquid, 16 bearings 30 to cause.Described seal arrangement plays the effect of two aspects: the firstth, running shaft 16 and pressurized container 40 assemblying bodys are sealed; The secondth, in the bearing 30 that the powder in the prevention pressurized container 40 or abrasion medium enter running shaft 16, thus the working life of prolongation bearing 30.
During use, the mounting point of described pressure equalizing chamber 20, bearing 30, pressurized container 40 and magnetic fluid seal 10 concerns as shown in Figure 5.Because magnetic fluid seal 10 can not bear higher positive pressure, therefore adopt pressure equalizing chamber 20 to come from the crunch that pressurized pressurized container 40 in is denuded liquid 42 with balanced action at magnetic fluid seal 10 downsides.The air pressure of pressure equalizing chamber 20 is delivered in the bearing 30, thereby acts on the upside of magnetic fluid seal 10.The air pressure of pressure equalizing chamber 20 must with pressurized container 40 in the pressure of pressurized abrasion liquid 42 substantially equate, so just can obtain pressure balanced effect, with the sealing that guarantees magnetic fluid seal 10 with magnetic fluid not by the pressure penetration in the pressurized container 40.
Described seal arrangement be a kind of can sealed pressure abrasion liquid, can guarantee that employed pressurized abrasion liquid is under the high pressure can not enter bearing because of pressure, cause the wearing and tearing of bearing and premature failure all needs this seal arrangement in many commercial Application.Before seal arrangement described in the utility model occurs, still do not have a technology to be used for solving pressurized abrasion liquid stirrer shaft and hold this problem of wearing and tearing.Described seal arrangement also can use in other similar environment, and in these environment, other kinds class I liquid I (such as pollutant, erosion) may be to bearing and related components injury, reduction of service life.
It is pointed out that described magnetic fluid seal 10 itself can not be used for running shaft 16 sealings of pressurized abrasion liquid 42.Seal arrangement described in the utility model is custom-designed for being applied in bearing-magnet fluid sealing, magnetic fluid seal 10 and pressure equalizing chamber 20 are used in combination, set up the obstacle that a pressurized abrasion liquid 42 penetrates magnetic fluid seal 10, thereby stop pressurized abrasion liquid 42 to enter in the bearing 30 of running shaft 16, effectively prevent bearing 30 wearing and tearing, the working life of improving bearing 30.When the medium that need to mix with liquid is the hard powder, set up such obstacle particular importance that seems, because this hard powder can make bearing 30 because of the Fast Wearing premature failure.
Preferably, described seal arrangement comprises one, the pressure equalizing chamber 20 of two or more series connection.When the pressure in the pressurized container 40 is larger, can be by series connection two or more pressure equalizing chamber 20(series connection situation not shown in FIG.) come the positive pressure in the offset pressure container 40.
Preferably, shown in accompanying drawing 3 and 4, described pressure equalizing chamber 20 is cylindrical structural.More preferably, shown in accompanying drawing 3 and 4, the counter balance pocket body 22 1 end outer surfaces of described pressure equalizing chamber 20 are provided with the screw threads for fastening face 220 for binding thread.End outer surface at counter balance pocket body 22 arranges screw threads for fastening face 220, and described screw threads for fastening face 220 makes things convenient for the fastening of screw thread in the position that threaded together is blocked as spanner constantly.
Preferably, described O shape circle (23,27) is polyurethane O shape circle.The general seal grease of described O shape circle (23,27) recommendation Parker also can select the O shape of other types or producer to enclose certainly, for example has the plus versions of the O shape circle of better wear resistance, as long as realize the purpose of sealing.
Preferably, as shown in Figure 2, described seal body 14 is provided with the compensating groove 142 that encloses 23 close contacts for running shaft 16 and O shape away from an end of permanent magnet rings 12.If described compensating groove 142 is not set on the described seal body 14, the plane of running shaft 16 can't be installed on O shape circle groove 242 in O shape circle 23 directly contact, be unfavorable for compressed-air actuated sealing in the pressure equalizing chamber 20.
Simultaneously, the method that the seal arrangement that the utility model also provides a kind of employing to be used for as mentioned above the raising bearing life seals pressurized container shown in accompanying drawing 5 and 6, may further comprise the steps:
(1) permanent magnet rings 12 of described magnetic fluid seal 10 is placed pressurized container 40 and be close to the inwall of described pressurized container 40; Perhaps the permanent magnet rings 12 of magnetic fluid seal 10 is placed the outside of pressurized container 40 and be close to the outer wall of described pressurized container 40;
(2) first the screw thread 140 of bearing 30 by described seal body 14 outer surfaces is fixed on the described seal body 14, and then with described pressure equalizing chamber 20 by being fixed on the described seal body 14 with the suitable seal body mating hole 24 of seal body 14; Perhaps first described pressure equalizing chamber 20 is fixed on the described seal body 14 by described seal body 14 suitable seal body mating holes 24, and then bearing 30 is fixed on the top of described pressure equalizing chamber 20.
When seal arrangement described in the utility model uses, pressure equalizing chamber 20, bearing 30, the position of the wall of pressurized container 40 and magnetic fluid seal 10 can change, for example, as shown in Figure 5, can be first place pressurized container 40 to be close to the inwall of described pressurized container 40 permanent magnet rings 12 of magnetic fluid seal 10, then the screw thread 140 of bearing 30 by described seal body 14 outer surfaces is fixed on the described seal body 14, bearing 30 is close to the outer wall of pressurized container 40, and then pressure equalizing chamber 20 is fixed on the described seal body 14, the upper end of bearing 30 is close in the lower end of pressure equalizing chamber 20, and this kind position relationship is followed successively by from bottom to up: magnetic fluid seal-pressure vessel wall-bearing-pressure balance chamber.Certainly, also can be according to being followed successively by from bottom to up magnetic fluid seal-pressure vessel wall-pressure equalizing chamber-bearing, perhaps pressure vessel wall-magnetic fluid seal-pressure equalizing chamber bearing, perhaps the position relationship of pressure vessel wall-magnetic fluid seal-bearing-pressure equalizing chamber is used in combination.In a word; this position relationship of the wall of pressure equalizing chamber 20, bearing 30, pressurized container 40 and magnetic fluid seal 10 is flexible and changeable, as long as can reach sealed pressure abrasion liquid 42 and protection bearing 30 and magnetic fluid seal 10 by the purpose of pressurized abrasion liquid 42 wearing and tearing.
It may be noted that, in the less situation of running shaft 16 load, bearing 30 can, magnetic fluid seal 10 can be used as bearing and uses.But, bearing at running shaft 16 in the situation of larger load, 30 on bearing must use.
As shown in Figure 6, a kind of erection drawing that uses state of seal arrangement described in the utility model, the running shaft 16 of described magnetic fluid seal 10 is inserted in the described pressurized container 40, then successively the mating reaction by screw of pad 32, bearing 30 and pressure equalizing chamber 20 is tightened on the described seal body 14, at last the running shaft of motor 50 is connected with running shaft 16 upper ends of described magnetic fluid seal 10 by coupling 52, provides power for the running shaft 16 of described magnetic fluid seal 10 rotates.In use, in order to ensure the stability of stirrer, can according to the structural feature of pressurized container and motor, make a framework with support motor 50 and pressurized container 40, the structure of described framework various (not shown in FIG.).In addition, in the using process of reality, stablize for the assembling that makes motor 50, seal arrangement and pressurized container 40 is convenient, also can do to some parts of pressurized container 40 architecture advances of adaptation, for example the handle at pressurized container cuts out two notches (not shown in FIG.), to guarantee the correct location of pressurized container and motor, make things convenient for the user rapidly container to be in place.
The serviceability test of embodiment's 1 seal arrangement described in the utility model
Adopt use status architecture schematic representation assembling as shown in Figure 6 to use, the pressure in the described pressurized container 40 is set to respectively 60psi, 100psi and 120psi, and the rotating speed of the running shaft 16 of described magnetic fluid seal 10 is set to respectively 350rpm and 245rpm.Done 6 groups of experiments under different condition, every group of experiment is 8 hours.Reserved time enough between every group of test motor 50 is cooled off fully, sloshing pressure container 40 fully contacts with bearing 30 surfaces with the pressurized abrasion liquid 42 that gives in the pressurized container 40.Need to prove that it is 20% widia micro mist that abrasion is added with volume ratio in the liquid, the diameter of micro mist be distributed in micron with time micron between.At 72 hours even longer duration of test, container did not carry out emptying, and test all is to use same O shape circle, after all tests are all finished just with its replacing.In the process of the test, pressurized abrasion liquid 42 is retained in all the time in the pressurized container 40 and is stirred all the time.Test conditions sees Table 1.
Table 1 test conditions
| Test number (TN) | Pressure (psi) | Rotating speed (rpm) | Time (hour) | Revolution (turning) |
| 1 | 60 | 350 | 8 | 168000 |
| 2 | 60 | 245 | 8 | 117600 |
| 3 | 100 | 350 | 8 | 168000 |
| 4 | 100 | 245 | 8 | 117600 |
| 5 | 120 | 350 | 8 | 168000 |
| 6 | 120 | 245 | 8 | 117600 |
| Amount to | 48 | 856800 |
Above-mentioned test shows that pressure equalizing chamber has the performance of expection, can be so that seal arrangement be realized the sealing to pressurized abrasion liquid, and the assurance bearing is not denuded the impact of liquid.In process of the test, the average abrasion amount of thickness is that the original depth of 0.2mm(O shape circle is 2mm after being installed in O shape circle in the O shape circle groove of described pressure equalizing chamber and turning through 85).Before O shape circle may wear to half, wear extent can be very little and rate of depreciation constantly reduce.Have a small amount of pressurized air and leak from pressure equalizing chamber after the above-mentioned time limit, this leakage can not reduce the pressure of pressure equalizing chamber, more can not affect the performance of seal arrangement.Certainly, when leakage is more serious, should change O shape circle.The above results shows that the utility model seal arrangement has enough sealabilities, can prevent that the pressurized abrasion liquid in the pressurized container from entering the bearing of running shaft, thereby guarantee the security of operation of bearing.
Last institute should be noted that; above embodiment is only in order to the technical solution of the utility model to be described but not to the restriction of the utility model protection domain; although with reference to preferred embodiment the utility model has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.
Claims (6)
1. a seal arrangement that be used for to improve bearing life is characterized in that, comprise magnetic fluid seal and with the suitable pressure equalizing chamber of described magnetic fluid seal;
Described magnetic fluid seal comprises permanent magnet rings, be fixed on the seal body of permanent magnet rings one end, pass the running shaft in described permanent magnet rings and seal body axle center, be provided with magnetic fluid in the described permanent magnet rings, the outer surface of described seal body is provided with screw thread;
Described pressure equalizing chamber comprises the counter balance pocket body, described counter balance pocket body interior is respectively equipped with seal body mating hole, running shaft through hole and running shaft leadout hole vertically, the internal surface of described seal body mating hole is provided with the screw thread suitable with the screw thread of described seal body outer surface, the joint of described seal body mating hole, running shaft leadout hole and running shaft through hole is equipped with O shape circle groove, in the described O shape circle groove O shape circle is installed, the side of described counter balance pocket body is provided with the pressurized air inlet hole.
2. the seal arrangement for improving bearing life as claimed in claim 1 is characterized in that, described seal arrangement comprises one, the pressure equalizing chamber of two or more series connection.
3. the seal arrangement for improving bearing life as claimed in claim 1 is characterized in that described pressure equalizing chamber is cylindrical structural.
4. the seal arrangement for improving bearing life as claimed in claim 3 is characterized in that the counter balance pocket body one end outer surface of described pressure equalizing chamber is provided with the screw threads for fastening face for binding thread.
5. the seal arrangement for improving bearing life as claimed in claim 1 is characterized in that, described O shape circle is polyurethane O shape circle.
6. the seal arrangement for improving bearing life as claimed in claim 1 is characterized in that, described seal body is provided with the compensating groove that encloses close contact for running shaft and O shape away from an end of permanent magnet rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263923 CN202674030U (en) | 2012-06-06 | 2012-06-06 | Sealing device used for prolonging service life of bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263923 CN202674030U (en) | 2012-06-06 | 2012-06-06 | Sealing device used for prolonging service life of bearing |
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| Publication Number | Publication Date |
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| CN202674030U true CN202674030U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220263923 Expired - Lifetime CN202674030U (en) | 2012-06-06 | 2012-06-06 | Sealing device used for prolonging service life of bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808851A (en) * | 2012-06-06 | 2012-12-05 | 张灿 | Sealing device for prolonging service life of bearing and use method thereof |
-
2012
- 2012-06-06 CN CN 201220263923 patent/CN202674030U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808851A (en) * | 2012-06-06 | 2012-12-05 | 张灿 | Sealing device for prolonging service life of bearing and use method thereof |
| CN102808851B (en) * | 2012-06-06 | 2014-08-06 | 张灿 | Sealing device for prolonging service life of bearing and use method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130116 Effective date of abandoning: 20140806 |
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| RGAV | Abandon patent right to avoid regrant |