CN103261759B - Lippacking - Google Patents

Abstract

The present invention provides a kind of lippacking, it is ring-type with monomer or multiple formation, possesses the lip (1) of complete cycle sliding contact with the surface of axle (0), lip (1) is bearing in elastic arm (2) and the flexible wall (3) of sliding contact position, the key portion (4) that elastic arm (2) and flexible wall (3) are linked with housing (10), using elastic arm (2) and flexible wall (3) as next door, with the surge-chamber (A) that monomer or multiple formation are ring-type, flexible wall (3) reduces pressure according to adding in surge-chamber (A) and deforms, lip (1) at least changes to radial direction.

Description

Lippacking

Technical field

The present invention relates to and axle sliding contact the lippacking that guarantees dissengaged positions that fluid circulates.

Background technology

It is in order to avoid sea water or other fluid is immersed in hull etc. based on the sealing device of the stern tube sealing device of boats and ships Functionally bad that the situation of the inside of structure or flow out from internal fluid causes and the device that possesses, for axle In the axis hole inserted, equip one or more layers lippacking being made up of the elastomer such as rubber, synthetic rubber.

Lippacking and the surface of axle are in sealing contact (below, be designated as sealing) sliding freely, pass through lippacking Pressurization or the fluid pressure differential etc. the most below of lippacking that the elastic force of self, spring etc. produce keep countershaft Urgent power.

As the effect of the elastic force etc. of lippacking self, carry out such as lower seal: first, elastic change based on lip The sealing (for example, referring to following patent documentation 1) of shape, second, the adjustment of the value of the magnitude of interference based on air spring type sealing is entered The sealing (for example, referring to following patent documentation 2) of row, the 3rd, it is arranged on lippacking and will push sealing lip to axle Urgent power gives the urgent power of this lippacking and gives the produced sealing of unit (for example, referring to following patent documentation 3 or special Profit document 4).

Patent documentation 1:(Japan) real public clear 50-15356 publication

Patent documentation 2:(Japan) Beneficial 5-36166 publication

Patent documentation 3:(Japan) Beneficial 2-76267 publication

Patent documentation 4:(Japan) Beneficial 5-25069 publication

Summary of the invention

But, according to said method, in first method and third method, lippacking is relative to the connecing of surface of axle The situation of touching (hereinafter, referred to as contact situation), the power elastic, urgent depending on lippacking gives the ability of unit, the Two methods also rely on the temperature environment of surrounding.

In above situation, because of the reduction of elastic force of the lippacking self through life-time service, sliding part Abrasion, it is impossible to maintain good urgent power, because vibration waits, the supporting situation of axle deteriorates, and produces at radial direction and exceedes the magnitude of interference Axial displacement state under, it is impossible to guarantee sufficient sealing state, there is sealing fluid and flow out outside device or cause outside stream The problem of the immersion of body etc.

The present invention makes in view of above-mentioned practical situation, its object is to, it is provided that a kind of lippacking, it possesses The structure of contact situation can be suitably adjusted in active ground, it is achieved that lip packing according to environment, the abrasion condition of lippacking The long lifetime of part and the raising of sealing property.

The lippacking of the present invention made to solve the problems referred to above, it is characterised in that possess the surface with axle On complete cycle the lip of sliding contact, the elastic arm that lip is supported on sliding contact position and flexible wall, by elastic arm And the key portion that flexible wall and housing link, possess elastic arm and flexible wall as the ring-type surge-chamber in next door, flexible wall Reducing pressure according to adding in surge-chamber and deform, lip at least changes to the radial direction centered by axle, thus carries out urgent power Adjustment and adjust lippacking sealing posture.Here, so-called change comprises contributes to deformation or the position that urgent power adjusts Move (advance and retreat).

In order to carry out the change of the form of flexible wall individually, structure can also be, possess in the inside of flexible wall with The compression chamber of described surge-chamber (A) concentric annular.Can also be formed equably along the circumference of flexible wall as compression chamber and can be supplied to Discharge the stream of fluid, it is also possible to be any one method such as telescopic pipe inserted and constitute such stream.

Elastic arm can list following composition: cross sectional shape is arc-shaped, く shape or linearity, and elastic arm's shape The form (flexible etc.) of the curvature of arc-shaped, the angle of bend of く shape or the linearity that become according in surge-chamber adding decompression and Change.

Flexible wall can list following composition: cross sectional shape is arc-shaped, く shape or linearity, and flexible wall formation The form of the curvature of arc-shaped, the angle of bend of く shape or linearity reduces pressure according to adding in surge-chamber and changes.

When determining the structure of lippacking, above-mentioned structure be may be appropriately used, maybe can also use and use above-mentioned structure The composition made.

It addition, by being coated with or built-in fiber or resin at flexible wall, key portion or the inner surface of elastic arm or outer surface Film, maybe can expect the raw material (hereinafter referred to as fiber etc.) similar therewith of following effects, suppression has the side of fiber etc. Stretch or improve intensity partly, thus can also be from textural control flexible wall or the bending shape of elastic arm.

Can also be to possess the countershaft spring of urgent power of imparting lip, ring-spring etc. at lip urgent it addition, constitute Power gives unit, carries out the adjustment of described urgent power from there through the balance with the elasticity of elastic arm.

It can be sealing based on monomer that the lippacking of the present invention is constituted, it is also possible to be by multiple parts (such as, tool Have the parts of the ring-type shape split) connect to be formed in use ring-type, and shape together with surge-chamber or compression chamber Become the outward appearance of axisymmetric body.

Invention effect

The lippacking of the present invention by forming ring-type surge-chamber using elastic arm and flexible wall as next door Constituting, flexible wall reduces pressure according to adding in surge-chamber and deforms, it is possible to make lip at least adjust urgent to radial direction change Power, the magnitude of interference.As a result of which it is, can be according to environment, the abrasion condition of lippacking, active ground suitably adjusts contact situation.Separately Outward, it is also possible to prevent the outflow sealing fluid or the immersion of external fluid that pressure oscillation causes.

It addition, by using the structure possessing compression chamber in the inside of flexible wall, the metamorphosis of flexible wall is possibly realized, the most more Change the pressure in the surge-chamber required for the variable quantity of lippacking also adjustable lip or a certain amount of change of lip to become Change and wait (specification of lip).Utilize this adjustment, it is possible to suppression elastic arm changes the fatigue caused over the years.

As the cross sectional shape of elastic arm, by using arc-shaped, く shape, thus the arc-shaped of flexible wall formation The form of curvature, the angle of bend of く shape or linearity reduces pressure according to adding in surge-chamber and changes, and flexible wall can be made to have The standby effect as the connecting rod for making lip retreat relative to axle.

It addition, by flexible wall, key portion or the inner surface of elastic arm or outer surface cladding or built-in fiber etc., pressing down Fixture has the flexible of the side of fiber etc. or improves intensity partly such that it is able to constructively control flexible wall or elastic arm Bending, as a result, it is possible to make the metamorphosis of flexible wall or the elastic arm changed along with the pressure in surge-chamber stable, Make lip stable relative to the amount of the change of axle and direction etc..

Give the urgent power of the countershaft urgent power of lip give unit additionally, possess at lip, thus, it is possible to by with bullet Property the elastic balance of arm and carry out the adjustment of described urgent power, such as, even if in the case of the abrasion of lip etc. develops, Only not enough with the effect of surge-chamber or compression chamber countershaft pressure can also be supplemented.

Accompanying drawing explanation

Fig. 1 is the profilograph of the embodiment example of the lippacking representing the present invention；

Fig. 2 (A) and (B) are the enlarged drawings of an example of the effect of the surge-chamber A representing Fig. 1；

Fig. 3 is (A) of an example of the effect of the lippacking representing the present invention: during recovery, (B): during pressurization, (C): profilograph during decompression；

Fig. 4 is the profilograph of an example of the lippacking representing the present invention；

Fig. 5 is the profilograph of an example of the lippacking representing the present invention；

Fig. 6 is the profilograph of an example of the lippacking representing the present invention；

Fig. 7 is the profilograph of an example of the lippacking representing the present invention；

Fig. 8 is the profilograph of an example of the lippacking representing the present invention；

Fig. 9 is the profilograph of an example of the lippacking representing the present invention；

Figure 10 is the profilograph of an example of the lippacking representing the present invention；

Figure 11 is the profilograph of an example of the lippacking representing the present invention, and (A) expression is played elastic arm The structure of the effect that portion stretches laterally, (B) represents the structure playing effect elastic arm released to inner side；

Figure 12 is the profilograph of an example of the lippacking representing the present invention；

Figure 13 is the profilograph of an example of the lippacking representing the present invention；

Figure 14 is the profilograph of an example of the lippacking representing the present invention, situation when (A) represents usual, (B) situation of the adjustment of the pressure in expression compression chamber；

Figure 15 is the profilograph of an example of the lippacking representing the present invention；

Figure 16 is the profilograph of an example of the lippacking representing the present invention；

Figure 17 is the profilograph of the example representing existing lippacking.

Detailed description of the invention

Below, the embodiment of the lippacking of the present invention is described based on accompanying drawing.

Fig. 1 is the figure representing the example that the lippacking of the present invention is used for stern tube sealing device.

Stern tube sealing device shown in Fig. 1 is fixed with in the axis hole of housing 10 and forms ring-type lippacking 11, The lip 1 of lippacking 11 connects on complete cycle with the surface of axle 0.

Additionally, the ring-type ring that both can be ring-type lippacking 11 and formed with monomer that lippacking 11 is formed Shape, it is also possible to be that the lippacking 11 of multiple arc-shapeds is linked and formed ring-type.

Below, the embodiment of lippacking is described in detail based on accompanying drawing.

Example shown in Fig. 2 and Fig. 3 is the ring-type elastomer being made up of rubber, synthetic rubber etc., is by by one It is formed with the lip 1 slidably contacted the surfaces with axle 0, the elastic arm 2 that lip 1 is bearing in sliding contact position and flexibility Wall 3, key portion 4(or 4a, 4b that elastic arm 2 and flexible wall 3 are linked with housing 10) shape, centered by axle 0 rotate 360 The axisymmetric body spent and formed.

Lip 1 in this example uses front narrow mode as the contact surface connected with axle 0, and elastic arm 2 is with as follows Mode describes arc-shaped or the curve of く shape: from the end face of lip 1 to the length direction of the axle 0 answering sliding contact (hereinafter referred to as Any one party front and back) extends to towards outer (leaving the direction of axle 0), and arrives the outermost key being positioned at lippacking 11 Portion 4(or 4a).

It addition, the form of elastic arm 2 is not limited to describe the form of curve, it would however also be possible to employ constructed as below: from lip 1 Side any one party forwards, backwards stretches out to court, arrives the outermost key portion 4 being positioned at lippacking 11 generally in straight line (or 4a).

Flexible wall 3 erects from the outer surface (in the face of the side of housing 10) of lip 1 towards the outside of sliding contact position, The end of flexible wall 3 sets keyed portion 4(or 4b).

Elastic arm 2 and flexible wall 3(as required, comprise key portion 4(or 4a, 4b)) form ring-type as each next door Surge-chamber A, makes surge-chamber A carry out expanding, shrinking according to the decompression that adds in surge-chamber A.Along with the deformation of surge-chamber A, bullet Property arm 2 and flexible wall 3 deform, and are supported on the lip 1 of elastic arm 2 to inside and outside change.

It addition, in the case of using lippacking 11 to form ring-type composition with monomer, surge-chamber A becomes single Ring-type space or the structure ring-type space kept apart by multiple next doors.On the other hand, lippacking 11 uses and passes through In the case of multiple lippackings being attached and forming ring-type composition, formed in ring-type each lippacking 11, Become the surge-chamber A possessed open for the both sides of circumferencial direction, or possess inaccessible to one side or the both sides of circumferencial direction with next door The structure of surge-chamber A.

In the first embodiment shown in Fig. 2 and Fig. 3, key portion 4 separate front and back, possess the major key being connected with elastic arm 2 4a and the auxiliary bond 4b being connected with flexible wall 3, ridge 10a of the housing 10 prominent to axis hole embeds between major key 4a and auxiliary bond 4b Gap.

In this embodiment, the cross sectional shape of elastic arm 2 is く shape, and the cross sectional shape of flexible wall 3 is arc-shaped, flexible wall 3 Wall ratio elastic arm 2 thin.

Fig. 4 is the second embodiment that the cross sectional shape of flexible wall 3 is set as く shape, and Fig. 5 is cutting flexible wall 3 Face shape is set as the 3rd embodiment of linearity, and Fig. 6 is the anti-mistake in direction of the bending by the flexible wall 3 of the first embodiment The 4th embodiment come.

In this second embodiment, as long as the stretching on raw material or textural be suppressed, by exchanging of flexible wall 3 Pressure chamber A proceeds by pressurization from the intrinsic pressure of regulation, makes flexible wall 3 deform and improve the urgent power of lip 1 countershaft 0, if pressurization quilt Cut off or be depressurized (as long as or becoming negative pressure), then the urgent power of lip 1 countershaft 0 reduces (with reference to Fig. 4).

In the third embodiment, if the stretching on raw material or textural be suppressed, by pressure regulation of flexible wall 3 Room A proceeds by decompression from the intrinsic pressure of regulation, makes flexible wall 3 deform and weaken the urgent power of lip 1 countershaft 0, if supercharging, then lip The urgent power in portion 1 countershaft 0 increases (with reference to Fig. 5).

In the 4th embodiment, if the stretching on raw material or textural be suppressed, by pressure regulation of flexible wall 3 Room A proceeds by decompression (or forming negative pressure) from the intrinsic pressure of regulation, makes flexible wall 3 temporarily be deformed into linearity from case of bending, And improve the urgent power of lip 1 countershaft 0, by decompression (or forming negative pressure further) further, it is curved from linearity redeformation Curved state, weakens the urgent power of lip 1 countershaft 0, if decompression cut-off (if or state of releasing negative pressure), lip 1 countershaft 0 Urgent power reduces (with reference to Fig. 6).

It addition, structure can also be set as, it is also possible to change the setting angle of flexible wall 3, thus, not to surge-chamber A Apply in the case of pressure (time usual), play the effect (with reference to Figure 11 (A)) elastic arm 2 stretched laterally, or play The effect (with reference to Figure 11 (B)) that elastic arm 2 is pushed to inner side.

It addition, in addition to the surge-chamber A of lip 1 (in Fig. 2 and Fig. 3, the leading section of elastic arm 2), as labiad Give between portion 1 and axle 0 the urgent power of urgent power give unit 6 and in the case of spring is installed, at the outer surface of this lip 1 Complete cycle is provided with retention groove 1a for installing this spring.Urgent power gives unit 6 in addition to spring, it is also possible to be such as to have bullet The ring-type parts of property.

It addition, the 5th embodiment shown in Fig. 7 is the example of the urgent power imparting unit 6 not possessing the first embodiment Son.

In the 6th embodiment shown in Fig. 8 and the 7th embodiment shown in Fig. 9, it is integrally formed the first embodiment party The major key 4a and auxiliary bond 4b of formula, and form the mode of stream 10b that the fluid that oriented surge-chamber A fills is circulated, real the 7th Execute in mode, in key portion 4 also built with framework 4c that is conformal and that strengthen.

In the 8th embodiment shown in Figure 10, by arranging the first embodiment in opposition side relative to retention groove 1a Flexible wall 3, thus give unit (spring in this example) 6 by urgent power and be arranged on the inside of surge-chamber A.

According to embodiment illustrated above, by the decompression that adds in surge-chamber A, produce the circular arc formed with flexible wall 3 The expansion of the surge-chamber A being changed to master of the Curvature varying of shape or the angle of bend of く shape and contraction, play because described curvature becomes Air line distance flexible between the interior outer end of the flexible wall 3 generation such as changing makes work as the connecting rod that lip 1 is retreated relative to axle 0 With (with reference to Fig. 3).

That is, compared with when lip 1 does not produces abrasion, deterioration, when producing abrasion, deterioration, by making to surge-chamber A's Pressurization increases, and lip 1 advances to inner side wear extent, gives for lip 1 with axle 0 sliding contact sufficiently to inner side Urgent power (with reference to Fig. 2).

In the 9th embodiment shown in Figure 12, the dual flexible wall 3 that first embodiment is set.It addition, in this embodiment, Between each flexible wall 3, it is provided with retention groove 1a, pressure is installed in this retention groove 1a and gives unit 6.Therefore, pressure gives single Unit 6 is by the external environment from surge-chamber A, by suitably selecting the fluid of circulation in surge-chamber A, it is possible to contribute to durable years Prolongation.

In the tenth embodiment shown in Figure 13, the inner surface of flexible wall 3 or outer surface cladding or built-in fiber or film, Maybe can expect the raw material similar therewith (below, this part being denoted as composite part 5) of same purpose.Fiber, the raw material of film, The arrangement of fiber, thickness or weave non-woven etc. or the thickness etc. of composite part 5, according to the pressure that should be applied to surge-chamber A Scope, as the mode of texturing of flexible wall 3 of target, such as stretching on raw material or textural giving flexible wall 3 Suppression, or give the purposes etc. such as elasticity (elastic) and suitably select.

It addition, as required, it is also possible at auxiliary bond 4b or elastic arm 2 or the inner surface of major key 4a or the one of outer surface Part arranges composite part 5.

The 11st embodiment shown in Figure 14 is the example possessing compression chamber B in the inside of flexible wall 3.

In this example, the complete cycle at the pars intermedia of the inward-outward direction of flexible wall 3 forms ring-type retractility pipe, and can lead to Cross the change that the pressure adjusted in compression chamber B carries out the form of flexible wall 3, it is possible to carry out the adjustment of urgent power (with reference to Figure 14 (A)).It addition, accompany therewith, it is also possible to control elastic arm 2 changes the fatigue (with reference to Figure 14 (B)) caused over the years.

It addition, the space of the ring-type flexible wall 3 that both can be disposed on ring-type lippacking 11 of compression chamber B formation Formed with monomer, it is also possible to be the space of multiple arc-shapeds of the flexible wall 3 of lippacking 11 by being arranged at arc-shaped even Tie and formed.

In the 12nd embodiment shown in Figure 15 and Figure 16 and the 13rd embodiment, it is provided with at a lippacking A pair lip 1, is provided with supply at its connecting portion and discharges the stream of circulation in the space 4e being present between axle 0 and lippacking The leakage paths 4d of body.In this example, it is integrally joined to two lippackings realize.

In the 12nd embodiment, the lippacking of a pair first embodiments is connected back-to-back, the 13rd In embodiment, the lippacking and existing lippacking (with reference to Figure 17) one that will be provided with flexible wall 3 connect.

Label declaration

0 axle, 1 lip, 1a retention groove, 2 elastic arms, 3 flexible walls, 4 key portions, 4a major key, 4b auxiliary bond, 4c Framework, 4d leakage paths, 4e space, 5 composite parts, 6 urgent power imparting unit, 10 housings, 10a ridge, 10b stream, 11 lippackings, A surge-chamber, B compression chamber.

Claims (7)

1. a lippacking, it is characterised in that

Possess the surface with axle on complete cycle the lip of sliding contact, lip is bearing in sliding contact position elastic arm and Flexible wall, the key portion that elastic arm and flexible wall are linked with housing, and they are respectively formed as ring-type,

Possess elastic arm and flexible wall as the ring-type surge-chamber in next door,

The wall ratio elastic arm of flexible wall is thin,

When surface sliding contact on complete cycle of lip and axle, flexible wall reduces pressure according to adding in surge-chamber and becomes Shape, lip at least changes to the radial direction centered by axle.

2. the lippacking as described in the claims 1, it is characterised in that

Possess in the inside of flexible wall and the compression chamber of described surge-chamber concentric annular.

3. the lippacking as described in the claims 1 or 2, it is characterised in that

The cross sectional shape of elastic arm is arc-shaped, く shape or linearity, the curvature of the arc-shaped that elastic arm is formed or く word The angle of bend of shape reduces pressure according to adding in surge-chamber and changes.

4. the lippacking as described in the claims 1 or 2, it is characterised in that

The cross sectional shape of flexible wall is arc-shaped, く shape or linearity, the curvature of arc-shaped that flexible wall is formed or く shape Angle of bend reduces pressure according to adding in surge-chamber and changes.

5. the lippacking as described in the claims 1 or 2, it is characterised in that

Composite part is possessed at flexible wall or the inner surface of elastic arm or outer surface.

6. the lippacking as described in the claims 1 or 2, it is characterised in that

The urgent power possessed to giving urgent power between lip and axle at lip gives unit.

7. the lippacking as described in the claims 1 or 2, it is characterised in that

Lippacking is to connect to ring-type by multiple parts and constitute.