CN106949242A

CN106949242A - Seal for providing sealing between the part of rotating machinery

Info

Publication number: CN106949242A
Application number: CN201610855293.0A
Authority: CN
Inventors: 加思.坎特里尔
Original assignee: Weir Minerals Australia Ltd
Current assignee: Weir Minerals Australia Ltd
Priority date: 2008-07-14
Filing date: 2009-07-14
Publication date: 2017-07-14
Anticipated expiration: 2029-07-14
Also published as: CN106949242B; CN102089557A; ZA201100185B; AU2009270327A1; BRPI0915861A2; WO2010006364A1; BRPI0915861B1; AU2009270327B2; CN102089557B

Abstract

A kind of seal for being sealed between the part of rotating machinery is provided, the seal has the shape of ring.Seal is made up of the deformable material of homogeneity.The seal includes connecting plate and the inward flange and outward flange that extend from connecting plate, and the distance that inward flange extends from connecting plate is bigger than the distance that outward flange extends.The seal also includes a series of ribs separated around interannular, and each rib is at least partially disposed between inward flange and outward flange, and wherein outward flange terminates at the antelabium on the whole periphery generally surround seal.

Description

Seal for providing sealing between the part of rotating machinery

The application be the applying date be on July 14th, 2009, Application No. 200980127123.9 is entitled " to be used for The seal of sealing is provided between the part of rotating machinery " Chinese patent application divisional application.

Technical field

The present invention relates to the seal for providing sealing between the part of rotating machinery.It finds particular application in solid Determine the sealing between part and a described example include it is close between the filter of sewage pump and the body of sewage pump Envelope.

Background technology

Rotating machinery generally includes the rotor installed in case inside.The rotor is installed on the rotating shaft, described to rotate Axle is then installed to the housing.Between the part of machinery, such as usually required between the part of housing some form of Sealing.In order to realize this sealing, the seal coordinated between housing parts can be used.Generally it is made up of casting method Housing parts, it causes the surface smoothness of relative coarseness.In order to provide effective sealing, it is necessary to machine the table of housing first Face is to provide the smooth surface of contact seals.This machine may have to be repeated after later heat treatment step to add Work.

The content of the invention

In the first aspect there is provided a kind of seal for being sealed between the part of rotating machinery, seal tool There is the shape of ring；The seal is made up of homogeneity, deformable material；The seal includes connecting plate and from the connection The inward flange and outward flange of plate extension, the distance that the inward flange extends from the connecting plate is than the outward flange from the connecting plate The distance of extension is bigger；The seal further comprises a series of ribs separated around the interannular, each rib cloth at least in part Put between the inward flange and the outward flange；Wherein described outward flange is terminated at generally surround the whole of the seal The antelabium on periphery.

In use, the space that pressure fluid enters between the flange.This pressure promotes the antelabium outwards to deform To provide the enhanced sealing effectiveness leaned against on the mechanical part.The pressure that this effect can be counted as the seal is made With.

Throughout the specification, when being related to seal and use term " material of homogeneity ", it means described close Sealing is all made up of substantially the same material, and with substantially the same density and hardness.

The antelabium can have at least 20% length for being equal to the distance between the inward flange and outward flange.

The antelabium can have at least 50% length for being equal to the distance between the inward flange and outward flange.

The antelabium can have the length of the distance between approximately equal to described inward flange and the outward flange.

There is provided a kind of seal for being sealed between the part of rotating machinery in second aspect, seal tool There is the shape of the deformable rings of material of homogeneity；The seal include connecting plate and from the connecting plate extend inward flange and Outward flange；The inner surface of the connecting plate and the inward flange and outward flange limit an internal capacity；The seal is further Including a series of ribs for being arranged in the internal capacity and being separated around the interannular；And wherein described rib, which is occupied, to be less than 50% internal capacity.

When in order that with and when the seal is installed, it is crushed between the part of machinery.The quilt of the internal capacity The degree that rib is occupied influences the hardness of the seal, and its performance under compression.If be less than it has been found that rib is occupied 50% volume, when the actual outside dimension of the mechanical single part changes sizable degree, the seal Also it can deform to provide suitable sealing property.If it has been found that part be casting, and then before assembly not by Machining, it may appear that this change.

The rib occupies 5% to 40% internal capacity.

The rib occupies 5% to 20% internal capacity.

In one embodiment, the rib occupies about 10% internal capacity.

Include the rotating machinery of at least two housing members, at least two housing there is provided a kind of in a third aspect Component connects to limiting a ring packing volume between them；Seal is provided in the ring packing volume；Wherein The surface that the confession seal of the housing member is born against thereon is tapered.

During assembly, the seal can be stretched around one of surface of shell.It can use some type of Lubricant, such as oil, surfactant or suds are assembled.The tapered surface by providing, it is easier to close by stretching Sealing carries out assembly work.

The housing member connects with one heart.

One of housing member is basic machine, and another housing member is mechanical end cap.

The confession seal of the basic machine bear against surface thereon away from the mechanical direction to It is outer tapered.

The confession seal of the mechanical end cap bear against surface thereon away from the mechanical direction to It is outer tapered.

Brief description of the drawings

Referring now to accompanying drawing, as just example, an embodiment is described, wherein：

Fig. 1 is the perspective view of the seal according to an embodiment；

Fig. 2 shows Fig. 1 details A；

Fig. 3 is the plan of Fig. 1 seal；

Fig. 4 is the cross-sectional view along Fig. 3 line B-B；

Fig. 5 shows Fig. 4 details B；

Fig. 6 is the cross-sectional view along Fig. 3 line A-A；

Fig. 7 shows Fig. 6 details C；

Fig. 8 is the perspective view of the decomposition of the sewage pump for the seal for including Fig. 1；With

Fig. 9 is the cross-sectional view of Fig. 8 sewage pump.

Embodiment

Referring to figs. 1 to 7, the seal of the form of seal 10 is shown.Seal 10 generally with ring shape and Single-piece is made by injection-molded using elastic, homogeneity, elastomeric material.

In another embodiment, the seal with class shape can be provided, it can be manipulated into the shape of ring when using Shape, this will be described later.

For use, the proprietary elastomeric material of many ranks can be acceptable, such as rubber.

Seal 10 includes connecting plate 12, and the inward flange and the collar 16 form of the form of skirt 14 are extended with from connecting plate 12 Outward flange.A series of ribs 18 are separated around interannular, each rib 18 be at least partially disposed between skirt 14 and the collar 16 and from Skirt 14 extends to the collar 16.

Referring especially to Fig. 5 and 7, it can be seen that, the collar 16 is only attached to each rib at a part of place of the height of the collar 16 18, therefore limit the lip portion 20 extended around the whole periphery of seal 10.Antelabium have about with skirt 14 and the collar The equal length of inner distance between 16.The importance of this antelabium will be described in due course.

Inner surface, skirt 14 and the collar 16 of connecting plate 12 limit the internal capacity 17 of seal.It can be seen that this holds A part for product 17 is occupied by the material of rib 18 and remainder is free space.The volume and freedom occupied by timber material The hardness of the ratios affect seal in space during assembly, this will be described later.

The overall diameter of seal 10 is about 400mm.The distance between inner surface of the collar of skirt 14 and 16 is about 14mm.The length of antelabium 20 is about 16mm.Connecting plate 12 is about 5mm thick.Skirt 14 is about 3-4mm thick.The collar 16 exists It is about 8mm thick at its thickest point with the contact position of connecting plate 12.Connecting plate 18 is about 5mm thick.In other embodiment In it is of course possible to changing these sizes.

With reference to Fig. 8 and 9, the seal 10 being combined with the rotating machinery of the form of sewage pump 30 is shown.Sewage pump 30 is fitted In used in for from low lying areas, such as getting rid of the commercial Application of waste water in mining pumping installations or mineral processing factory In.Sewage pump 30 includes the end cap housing member of the form of filter housings 34, and the form of body housing 32 basic machine housing Component.Filter housings 34 and body housing 32 are in contact and the sealed volume of seal 10 is located in it to be limited to.Housing 32, 34 are made up of casting operation and bear against surface thereon to the confession seal 10 of housing 32,34 after a casting not Process.So, these surfaces there is casting finish in pump group part 30 rather than repaired by the process of separation or Glossily formed.As a result, can be had in the case where that need not spend the time in terms of machined sealing surface and make great efforts The sealing of effect, it has the benefit in terms of manufacturing cost.

Sewage pump 30 includes the centrifugal pump impeller 36 being arranged in drive shaft 37.When operated, impeller 36 operates to pass through The hole in filter 34 is provided to be drawn up sewage and discharge water by outlet 40.During its operation, in impeller High-pressure fluid area is formed in shell.Seal 10 is oriented so as to so that skirt 14 and the collar 16 are from connecting plate 12 towards higher-pressure region Extension.So, in use, high-pressure fluid enters the internal capacity of seal and for skirt 14 and the collar 16 are pressed against Therefore sealing effectiveness is increased on the respective surface of housing 32,34.Especially, the antelabium 20 provided around seal 10 is can be Therefore further increased with being positioned correctly against on the sealing surface of housing 32 around its circumference Free Transform under the pressure of fluid Strong sealing effectiveness.When pressure works, therefore seal 10 performs its function.

In order to assemble pump 30, it is necessary first to select the pad 38 of suitable size.Pad 38 is selected to obtain impeller 36 and mistake In the tight fit by the arrow C points indicated between the housing of filter 34.Make the size of pad 38 suitable, so that impeller 36 is matched somebody with somebody Close the drive shaft 37 in body housing 32.Then by filter housings 34 in the case of no sealing in place place Band comes on impeller 36 to be in contact with impeller 36 by the arrow C points indicated.Then housing 32, the distance between 34 is measured And the pad 38 of slightly greater thickness is selected to be inserted between housing 32,34.Then filter housings 34 are got rid of simultaneously And stretch seal 10 around the pipe end 41 of filter housings 34.Some cleaning agents or other lubricants can be used to help to enclose Around the fit seal 10 of pipe end 41.

In the seal embodiment of belt-like form, band can be manipulated into ring-shaped and then surround filter housings Part 34 tightly crimps and its distal end is bonded or fused together to form single-piece ring.Once bond or conjugate Do and have cured, the assembling of pump 30 can be continued as described.

In the case where pad 38 is in correct position, the band of filter 34 for being combined with seal 10 is come into body housing On 32.During assembly, seal 10 operate so that filter housings 34 with one heart, be centrally located in pump case 32.Pass through It is driven through a series of bolts that the paired respective aperture 42 provided around the periphery of filter housings 34 and pump case 32 is inserted Filter housings 34 are fixed and located in place.During tightening, seal 10 is deformed, the rib especially when twisting bolt 42 18 deform.The material that seal is made generally is incoercible, and therefore when rib 18 occurs compression and deformed, What they occupied the internal capacity of seal is previously the volume of free space.The deformation of seal 10 is used for allowing due to manufacture Change of the difference caused by error to the actual sealed volume between housing 32,34.Due to housing 32,34 be casting and after Not to be machined, the change of the sealed volume of different pumps can be very big.Seal 10 can allow the depth of pad 38 until 8mm Change.

The hardness of the volume of timber material and the Ratio control seal of free space, and therefore control seal 10 can be fitted The intensity of variation for the actual housing size closed.Seal with larger hardness is not easily adaptable to the change of size, but in group By with higher rigidity after dress, and therefore there is higher maximum operating pressure.Similarly, the sealing with smaller hardness Part is readily adapted to accommodate the change of size, but has relatively low rigidity after assembling, and therefore has relatively low maximum operation pressure Power.

Because any leak fluid is that can return to the wastewater disposal basin that pump 30 is aspirated from it, it is possible to allow sewage pump 30 A certain degree of leakage.

It can be seen that the sealing surfaces of housing 32 are outwardly tapered on the direction away from pump 30.Although not allowing from accompanying drawing Easily it appear that come, around filter housings 34 pipe end 40 sealing surfaces also away from pump direction on it is outwardly tapered, although Tapered degree is smaller than pump case 32.

Unless other places are indicated, it is not to be regarded as recognizing that it is comprising any referenced prior art herein Knowledge well known in the art.

Finally, it will be appreciated that without departing from the spirit or scope of the present invention various changes, modification and/or Increase can be incorporated into the various structures and arrangement of part.

Claims

1. a kind of sewage pump, including at least two housing members, at least two housing member connect to limiting one therebetween Ring packing volume；

It is arranged on the seal in the ring packing volume；

The surface that the confession seal of wherein described housing member is born against thereon is tapered；

The seal has the shape of the deformable rings of material of homogeneity；

The seal includes connecting plate and the inward flange and outward flange that extend from the connecting plate；

The inner surface of the connecting plate and the inward flange and outward flange limit an internal capacity；

The seal also includes a series of ribs for being arranged in the internal capacity and being separated around the interannular；And

Wherein described rib occupies the internal capacity less than 50%.

2. sewage pump as claimed in claim 1, wherein the rib occupies 5% to 40% internal capacity.

3. sewage pump as claimed in claim 1, wherein the rib occupies 5% to 20% internal capacity.

4. sewage pump as claimed in claim 1, wherein the rib occupies about 10% internal capacity.