CN205173245U

CN205173245U - Seal

Info

Publication number: CN205173245U
Application number: CN201520307898.7U
Authority: CN
Inventors: 斯特凡·萨德尔
Original assignee: IMO Holding GmbH
Current assignee: IMO Holding GmbH
Priority date: 2014-05-13
Filing date: 2015-05-13
Publication date: 2016-04-20
Anticipated expiration: 2025-05-13
Also published as: DE202014003963U1; ES1139558Y; ES1139558U; DK201500065U3

Abstract

The utility model provides a seal (24, 25) which is used for antifriction bearing (1) or other to rotate connecting device, and its characterized in that has cavity (29) that are used for holding the filling medium at seal (24, 25) internal layout, annular ground is being set aside under the circumstances that one or more poured into opening (33) by global encirclement to the cross section of cavity.

Description

Sealing

Technical field

The utility model relates to the Sealing in the gap between a kind of two annular linkage members for rolling bearing or other rotary connecting devices.

Background technique

Especially so-called large-size rolling bearing, it is preferably used in the application of various types of heavy duty, wherein, the machine often relating to every day and all will work in physical environment, such as excavator, rock tunnel(ling) machine etc.At this, under these service condition, more do not consider the component of these machines.In ground construction work or tunnel construction work, such as, always there is dust, it can invade the sensitizing range of machine and cause damage to machine and even make it be damaged completely.This especially also relates to rolling bearing and other rotary connecting device, and they closely can be guided in the mode of rotational motion to each other by the rolling element of multiple rolling between raceway.If the dirt particle that dust is even larger invades in this raceway system, so they also to drop between rolling element and its raceway sooner or later and to cause infringement in this case, first cause the infringement to raceway, then also cause the infringement to rolling element in some cases.In order to avoid this situation, the entrance with the gap of one or more raceway system is sealed.Usually use the Sealing be made up of elastomeric material such as rubber for this reason.These Sealings are fixed on one of two rotating components defining relevant gap, such as be fixed on there, circular ring around groove in, and usually have towards the sealing lip of another rotating component, its rest on there stop surface on and guided along stop surface when two rotating components reverse each other.Usually, these Sealings realize its object, that is, make the inner region in gap protected in order to avoid suffer dust and other dirt particles.But they can be worn (such as due to the friction of sealing lip on stop surface, due to corrosive chemical, due to solar radiation etc.), and therefore inevitablely to replace sooner or later.At this, when gap (being furnished with this Sealing in the entrance region in this gap) is very narrow, sometimes deposit in a case where, namely, new Sealing can not be put into when not taking rolling bearing or other slewing gear apart, and can not just put into new Sealing after not dismantling two annular linkage members.This operation is very troublesome, this is because in order to take bearing apart or first rotary connecting device must be extractd, this only can realize when dismantling whole machine as a rule.Therefore, when rolling bearing itself and raceway are all also good, only in order to change impaired Sealing, just to take machine apart be completely irrational.If but Sealing is not changed in time, so very fast dirt particle will enter into raceway and rolling element and make it impaired.

Model utility content

Create task of the present utility model by the shortcoming of described prior art, that is, improve the Sealing of this generic as follows, make them to be loaded into when not dismantling bearing as far as possible or to be changed by Sealing of the same type.

This task solves in the following manner, that is, have the cavity for holding filled media in Sealing internal placement, its cross section is surrounded by side face circlewise when not considering one or more fill openings.

That is, this Sealing is not solid, but has internal cavities.This makes, Sealing can be compressed under the state of not pouring into, especially be compressed in the sub-fraction of its cross section under the state of having poured into, thus the seal can be pushed into until the receiving groove of there in narrow and small gap, so the seal is fixed in receiving groove.If the seal is loaded into as in its receiving groove arranged, so the seal can be poured subsequently and expand thereupon.The seal is preferably made up of elastic material.If therefore pour into Sealing in the mode of internal over pressure, so it can extend on cross section, and wherein, the region being configured to sealing lip is pressed against on the stop surface that for this reason arranges, thereby produces the sealing effect of expectation.When two parts that will seal relative to each other relative to each other move (especially rotating), this sealing is also worked.

Be proved to be as advantageously, the groove of Sealing being inserted as follows the annular of annular linkage member closed is inner, that is, the cavity in Sealing is within groove partly, mostly or fully.This layout has the following advantages, that is, Sealing is from inner setting to cell wall and bottom land, so and can not continue in those directions to expand again.So Sealing does not have other to select, can only expand towards other rotating component in other words towards gap.Meanwhile, bottom land supporting sealing member, thus when cavity fully pours into, very large internal pressure can be caused and between sealing lip and stop surface, cause under any circumstance all sufficient extruding force thus.

When according to Sealing of the present utility model, very advantageously, the cavity in Sealing is all closed in all sides, even if thus when internal pressure is larger filled media also can not spill.Therefore, relative to other mode of executions (cavity is not besieged on its whole cross section), as long as sealing material itself is not porous, just reliably leakage is eliminated.But nonetheless, can provide this in the utility model is at least the temporary transient stuffing pressure remedying to improve in cavity, such as, by pump or analog being connected in fill openings.

In framework of the present utility model, the cavity in Sealing constructs circlewise, that is, and double connected (zweifach ) construct.Thus, Sealing has consistent cross section and therefore also has constant characteristic in the circumferential direction of involved gap entrance.That is, there is not following danger, that is, occur different pressure ratios at regional, it can cause increasing wearing and tearing or or even damaging.

Other advantages can be obtained in the following manner, that is, the cavity in Sealing is perfused with overvoltage maybe can pour into overvoltage, such as 0.2 super-atmospheric pressure (at ü) or higher pressure, preferably 0.5 super-atmospheric pressure or higher pressure, especially 0.8 super-atmospheric pressure or higher pressure.This causes, and Sealing, and can by corresponding pressure by pressing to stop surface in the region of the sealing lip freely placed or under it by corresponding stabilization well.

Therefore, once sealing lip with backstop outside it on annular linkage member and simultaneously with its medial support on the cavity be poured, the mechanical pressure so between sealing lip and stop surface is just in balance with the pressure of the pneumatic or fluid power in cavity.As long as therefore sealing material is not extend (this is almost impossible in narrow gap) with elastic type, so sealing lip is roughly proportional and therefore can adjust individually with regard to the internal pressure in opposing seal cavity towards the extruding force of stop surface.Therefore, such as special operating conditions can be considered.When being used in the strong environment polluted, and be used in clean the higher internal pressure that Comparatively speaking such as can adjust in cavity.On the other hand, relative to environment, namely usually there is pressure difference relative to barometric pressure.Therefore, when being used in very high height, such as, on aircraft, helicopter or dirigible, compared with being such as used in deep-sea and (there is obviously larger external pressure there), less extruding force can be adjusted.

Other advantage is obtained by least one perfusion interface for compressor, pump, air pump or analog.Implementing as above, therefore can pour into cavity after Sealing is such as arranged to groove inside, and can extruding force be adjusted.There is following possibility in addition, that is, in the time lag determined or after internal pressure drops to threshold value, improve internal pressure, its mode is, other filled media is filled in cavity.

Also arrange according to the utility model, perfusion interface arrangement is in the region of linkage member containing Sealing.So, therefore pour into interface not towards gap to be sealed, but can be close from outside.

Another kind of design proposal regulation, perfusion jointing, in the end of involved linkage member, is particularly in the end of not serving as conjunction plane of involved linkage member.Because another machine part rests on flat conjunction plane under assembling condition, so pouring into interface is there at least almost cannot be close or or even interfering.

Preferably, pour into interface and be provided with safety check.Ensure thus, the fluid of filling can not spontaneously spill after the priming.

Finally corresponding to instruction ground of the present utility model, perfusion interface is connected with and maybe can connects pressometer.Therefore can detect the state of Sealing from outside in a comfortable way, that is, detect cavity and whether such as leak due to porosity or unencapsulated position; In addition can measure and correct or adjust the extruding force of sealing lip towards its stop surface.

Different possibilities is existed for filled media.It can be gas, such as air, particularly pressurized air.But can also liquid be expected in principle, such as water or oil, or even pasty masses such as fat.The latter is easy unlike pressurized air relative to the porosity of Sealing inside to be affected, and pressurized air just spills under minimum blow-by.In addition, also recharge by identical instrument, such as self lubricate again, particularly when recharging the formal construction of interface with grease tap.In the filled media such as compressed-air actuated situation of gaseous state, recharge interface and can show greatly the patten's design similar with the compressed air valve on bicycle tyre or automobile tire.

Accompanying drawing explanation

Based on the utility model, other features, details, advantage and effect are to the following explanation of preferred implementation of the present utility model and draw by reference to the accompanying drawings.Wherein:

Fig. 1 illustrates the cross section of the annular linkage member being horizontally through rolling bearing, and

Fig. 2 illustrates the intercepting enlarged view of the cross-sectional view of Fig. 1.

Embodiment

The device illustrated in FIG is large-size rolling bearing 1.It comprises two annular linkage members 2,3.They are preferably arranged on radial formula ground inserted into each other, thus can be called as outer ring 2 and inner ring 3.

Two linkage members 2,3 have smooth end face 4-7 respectively.The height of two linkage element 2,3, that is the spacing of their each end face 4,6 or 5,7, is in the same size.

Although two upper formula ground inserted into each other of linkage member 2,3 radial direction are arranged, they have passed a very little amount in the axial direction relative to each other, thus end face 5,6 protrudes from each adjacent end face respectively.Each end face 5,6 protruded preferably serves as conjunction plane 5,6 for resting on machinery or unit parts, frame or pedestal, and relative to they correspondingly circle 2,3 rearward can relative to each other reverse.In order to conjunction plane 5,6 is fixed on relevant machinery or unit parts, frame or pedestal, conjunction plane 5,6 by circlewise along circle circumferential distribution the hole 8,9 arranged run through, so that will (screw thread) bolt or pin or analog insertion or be screwed into.

Exist between two linkage members 2,3 gap 10, arrange or multiple row rolling element 11,12,13 in gap along raceway 14,15 rolling.

In the illustrated embodiment, the raceway 14 of linkage member 2,3 (being outer linkage member 2 in current situations) be in stretch out from linkage member towards gap 10, circular ring around flange 16.This flange 16 (as the matrix of involved circle 2,3) has roughly rectangular cross section.

In order to provide position to this flange 16, another linkage member 3,2 (being inner linkage member 3 in shown example) have in the region in gap 10 circular ring around recess 17.Flange 16 is embedded in this recess 17.That is, there is overlap in radial directions, and therefore can on the one hand between the top side of flange 16 and the top side of recess 17, and on the other hand between their bottom side, rolling element 11,12 is respectively along raceway 14,15 rolling of there.When rolling element 11,12 of roller shape, these raceways 14,15 are flat.These rolling elements 11,12 mainly transmit or only transmit the power on axial direction.

Another row rolling element 13 along raceway 14,15 1 aspect in the free end side of flange 16 and on the other hand rolling on the bottom of recess 17.The power that this rolling element 13 mainly transmits or only transmits in the radial direction.

In order to rolling bearing 1 can be assembled, wherein flange 16 must be put into as in its recess 17 arranged, the linkage member 2,3 (being inner ring 3 in the current situation) with recess 17 is divided into two mutually stacked each other circles 19,20 along separation line 18, thus these circles 19,20 can connect, such as, by bolt 21 around flange 16 ground of another linkage member 2 corresponding after its splicing.

In order to protect rolling element 11,12,13 and raceway 14,15 and make rolling process become easy, gap 10 should be filled with oiling agent, such as lubricating grease or lubricant oil.In order on the one hand make oiling agent spill and make dirt particle invade on the other hand, gap 10 is closed each via a Sealing 24,25 in the region of its top entry 22 and bottom inlet 23.

These Sealings 24,25 can be that structure is identical, but also can be different where necessary; In current example, two Sealings 24,25 are that structure is identical, and therefore with reference in the following situation of figure 2, and one that only sets forth typically in two Sealings 24,25 for these two Sealings is just enough:

Each Sealing 24,25 has configuration that is annular, double connected.It is integrally contained in (preferably following a linkage member 2,3 of two linkage members 2,3, namely, it does not have conjunction plane 5,6 there in the region of involved bearing side, but its end face 4,7 is rearward relative to above-mentioned conjunction plane 5,6) on circular ring around, in the recess 26 of channel-shaped.This accommodating part 26 can have rectangle or roughly rectangular cross section.Involved groove be arranged in involved linkage member 2,3 towards gap 10, column or hollow columnar side face in; Opening is towards gap 10 in other words towards another linkage member 3,2 corresponding.

The seal element 24,25 of annular is put in the recess 26 of channel-shaped.In order to this object, the external cross section of seal element roughly can mate with the cross section of the recess 26 of channel-shaped.Especially, the external cross section of annular seal element 24 has roughly rectangular geometrical shape equally, and it has the size roughly corresponding to groove cross section.

Seal element 24,25 can have one or more sealing lip 27 towards gap 10 or on the side of opposite linkage member 2,3 after putting in groove 26, described sealing lip rest on another linkage member opposed with groove 26, as on the face 28 of stop surface.Preferably there is multiple this sealing lip 27 (being three this kind of sealing lips in the embodiment illustrated), they that is on the direction of the rotation axis of rolling bearing 1, relative to each other stagger in the axial direction.

Seal element 24,25 is made up of elastic material, such as, be made up of rubber, rubber or analog.But according to instruction of the present utility model, seal element is not solid, but construct hollowly.In seal element 24,25, the longitudinal direction that cavity 29 follows groove 26 along it extends.The configuration of this cavity preferably follows the exterior configuration of seal element 24,25, thus material thickness at least range selector ground constant between the interior and exterior surfaces.But this is not enforceable; On other occasions, endo conformation and exterior configuration also can be different from each other.

The exterior configuration of hose-like seal element 24,25 so in all cases all should in that side towards groove 26 corresponding to the configuration of groove.Two cross sections need not to be rectangle.But the shape corresponding to the pure column of desirable anchor ring is not too recommended, this is because cannot guarantee that sealing lip 27 is towards gap 10 or the orientation towards stop surface 28 wherein enduringly.On the contrary, one or more seamed edge 30 is responsible for accurately maintaining presetting location, position enduringly, and wherein, one or more sealing lip 27 is towards stop surface 28.

That be compared to the remainder of seal element 24,25, such as opposed region 32, the region 31 of the end face 4,7 of the vicinity towards involved linkage member 2,3 of seal element 24,25 can have bigger thickness.

At this region 31 place preferably thickened of the seal element 24,25 of hose-like, there is at least one fill openings 33, cavity 29 perfusion of fluid can be given thus, such as aerate or other gas, or perfusion fluid such as water or oil, but also can pour into pasty masses where necessary, such as fat, particularly lubricating grease.

In order to make fill openings 33 can extend through joint 34 between groove 26 and the most contiguous end face 4,7 of involved linkage member 2,3, slit that is porose or that open wide towards gap 10 is set in this joint 34.Wherein, a kind of sleeve pipe 35 extends through joint 34, and this sleeve pipe is connected in the following manner with the seal element 24,25 of hose-like, that is, make the cavity 36 of sleeve pipe 35 inside be communicated with the fill openings 33 of seal tube 24,25 inside.Sleeve pipe 35 such as can with seal tube 24,25 bonding or otherwise connect.The longitudinal axis of sleeve pipe 35 stretches out substantially vertically from the surface segment 32 involved by seal tube 24,25, and pass joint 34 until the end face 4,7 of vicinity directly, described end face is not conjunction plane 5,6.Although preferably, sleeve pipe 35 is protruding further there, but does not preferably protrude from adjacent conjunction plane 4,5 at this.Sleeve pipe 35 can be fixed exactly, and its mode is, has screw thread in the arranged outside of this sleeve pipe, can screw on nut 37 or similar screw member thereon.The portion of widening be arranged on inside groove of sleeve pipe 35 can be made accordingly to ajust in the following manner, that is, sleeve pipe 35 cannot be fixed on the inside of joint 34 movably.

Preferably there is safety check in sleeve pipe 35 inside, it is closed when internal over pressure, and opens when outside overvoltage.In order to this object, placed in the middle, the coherent cavity 36 of sleeve pipe 35 inside can have the region along groove 26 towards the broadening in the direction of end face 4, such as rank shape portion.It can also be in the section being positioned at joint 34 outside of sleeve pipe 35.Before this shape portion, rank, valve body is there is, such as spheroid in cavity 36.It presses to the shape portion, rank as valve seat by internal over pressure or by spring 37, and valve is cut out and do not have fluid to spill thus.On the contrary, if external pressure is preponderated, so valve body can get loose from valve seat and valve is opened, to pour into cavity 33.

In order to this object can use compression device, pumping equipment or presses 38, the fluid type that its structure uses depending on cavity 29 inside.If use air for this reason, so it can be air pump, compressor or other source of compressed air.When being such as the gas of nitrogen, it can be pressure bottle or other pressurized containers with associated gas.For liquid filling medium, such as water or oil, can be provided with pump for this reason, and pump aspirates relevant fluid from the storage for this reason arranged.Paste fluid, such as lubricating grease such as by press device, particularly can be pressed in cavity 29 by oiling agent press device.

On the output interface of each compression device, pumping equipment or presses 38 or pressure measuring device 40 should be provided with therefrom to the pipeline 39 (particularly with the form of sleeve pipe 35) of the bearing side interface of seal element 24,25, particularly pressure gauge, so that the stuffing pressure that can adjust in cavity 29 targetedly and accurately.When full-automatic perfusion equipment 38, also sensor is used with can replacing pressometer 40 or pressure gauge, electronically the output signal of sensor and limiting value can be compared, to produce the cut-off signals for full-automatic perfusion equipment 38 when reaching required stuffing pressure.

In order to simplify filling process further, sleeve pipe 35 can its outside, beyond the region of end face 4,7 there, there is the possibility for temporary transient anchoring perfusion equipment 38 or priming line 39, this perfusion equipment 38 or priming line 39 can not spontaneously get loose from sleeve pipe 35 thus.At this, this possibility can be the outside thread on sleeve pipe 35, the adapter on priming line 39 free end can be screwed thereon, or this possibility be circular ring around flange, can by can the locking circle of elastic expansion be pushed on this flange on pipeline adapter or analog.

The seal tube 24,25 of annular can to carry out cutting corresponding to the size of gap girth and to be manufactured by connection two ends (such as by bonding) from the moulding section of straight line.

So go up in position (such as in the region of this joint part), can thrust or punching press fill openings 33, and then sleeve pipe 35 can be anchored at wherein.This sleeve pipe can also be ajusted by packing ring or analog on the inner side of flexible pipe 24,25 in the case of necessary.

Usually, sleeve pipe 35 only can cause small imbalance, but its most relatively little rotating speed due to small weight and the joint 34 interrupted there and large-size rolling bearing 1 and be almost not noticeable.If want reliably to avoid this imbalance, can setting example as two sleeve pipes 35, they be arranged in involved linkage member 2,3 in region diametrically opposite each other.If necessary, two docking sites for seal tube 24,25 (Sto β stelle) can also be set there.

Stuffing pressure in cavity 29 such as can be adjusted to 2bar, but it is significantly different with it also can to depend on embody rule situation ground.

(no matter being such as due to very little leakage or the wearing and tearing due to sealing lip 27 for which reason), if the stuffing pressure in cavity 29 declines after some time gradually, so the sealability of Sealing 24,25 may reduce.But in this case, can simply by the value again connecting perfusion equipment 38 and to be risen to again by the stuffing pressure in cavity 29 expectation.

Because remove perfusion equipment 38 at run duration, so when sleeve pipe 35 to be on revocable linkage member 2,3 and therefore to rotate with it, also can not problem be there is.

Reference numerals list

1 large-size rolling bearing

2 linkage members

3 linkage members

4 end faces

5 conjunction planes

6 conjunction planes

7 end faces

8 holes

9 holes

10 gaps

11 rolling elements

12 rolling elements

13 rolling elements

14 raceways

15 raceways

16 flanges

17 recesses

18 separation lines

19 circles

20 circles

21 bolts

22 entrances

23 entrances

24 seal elements

25 seal elements

26 grooves

27 sealing lips

28 stop surfaces

29 cavitys

30 seamed edges

31 regions

32 regions

33 perfusion equipments

34 joints

35 sleeve pipes

36 cavitys

37 springs

38 perfusion equipments

39 pipelines

40 pressure measuring devices

Claims

1. a Sealing (24,25), it is configured to the gap (10) be sealed between two annular linkage members of rolling bearing (1) or other rotary connecting devices, it is characterized in that, within described Sealing (24,25), be furnished with the cavity (29) for holding filled media, the cross section of described cavity is surrounded by side face circlewise when not considering one or more fill openings (33).

2. Sealing according to claim 1 (24,25), it is characterized in that, seal element (24,25) is inserted within the closed groove (26) of the annular of annular linkage member in the following manner, that is, the described cavity that described Sealing (24,25) is inner is within described groove (26) partly, mostly or fully.

3. Sealing according to claim 1 and 2 (24,25), is characterized in that, the cavity (29) within described Sealing (24,25) constructs circlewise, that is, and double connected ground structure.

4. Sealing according to any one of claim 1 to 3 (24,25), is characterized in that, the cavity (29) within described Sealing (24,25) is perfused with overvoltage and maybe can pours into overvoltage.

5. according to Sealing in any one of the preceding claims wherein (24,25), it is characterized in that at least one sealing lip (27), described sealing lip with backstop outside it on annular linkage member, and simultaneously with its medial support on the cavity be poured (29).

6., according to Sealing in any one of the preceding claims wherein (24,25), it is characterized in that at least one perfusion interface (33,35) is for compressor, pump, air pump or similar perfusion equipment (38).

7. according to Sealing in any one of the preceding claims wherein (24,25), it is characterized in that, described perfusion interface (33,35) is arranged in the region of the described linkage member containing described Sealing (24,25).

8. according to Sealing in any one of the preceding claims wherein (24,25), it is characterized in that, described perfusion interface (33,35) is in end face (4,5,6, the 7) place of involved linkage member.

9. according to Sealing in any one of the preceding claims wherein (24,25), it is characterized in that, described perfusion interface (33,35) is provided with safety check.

10. according to Sealing in any one of the preceding claims wherein (24,25), it is characterized in that, described perfusion interface (33,35) is connected with and maybe can connects pressometer (40).

11. Sealings according to claim 1 and 2 (24,25), it is characterized in that, cavity (29) within described Sealing (24,25) is perfused with overvoltage and maybe can pours into overvoltage, and described overvoltage is 0.2 super-atmospheric pressure or higher pressure.

12. Sealings according to claim 1 and 2 (24,25), it is characterized in that, cavity (29) within described Sealing (24,25) is perfused with overvoltage and maybe can pours into overvoltage, and described overvoltage is 0.5 super-atmospheric pressure or higher pressure.

13. Sealings according to claim 1 and 2 (24,25), it is characterized in that, cavity (29) within described Sealing (24,25) is perfused with overvoltage and maybe can pours into overvoltage, and described overvoltage is 0.8 super-atmospheric pressure or higher pressure.

14. Sealings according to claim 1 and 2 (24,25), it is characterized in that at least one sealing lip (27), described sealing lip with backstop outside it on annular linkage member, and simultaneously with its medial support on the cavity be poured (29), and carry out in the following manner, that is, the pressure that is pneumatic or fluid power within the mechanical pressure between sealing lip (27) and stop surface (28) and described cavity (29) is in balance.

15. Sealings according to claim 8 (24,25), it is characterized in that, described perfusion interface (33,35) is in end face (4, the 7) place of not serving as conjunction plane (5,6) of involved linkage member.