CN2326787Y

CN2326787Y - Rotary sealing device

Info

Publication number: CN2326787Y
Application number: CN 98225928
Authority: CN
Inventors: 陆吉明; 郑焕章
Original assignee: HUDONG ENVIRONMENT ENGINEERING COMPLETE APPARATUS FACTORY WUXI
Current assignee: HUDONG ENVIRONMENT ENGINEERING COMPLETE APPARATUS FACTORY WUXI
Priority date: 1998-01-24
Filing date: 1998-01-24
Publication date: 1999-06-30
Anticipated expiration: 2008-01-24

Abstract

The utility model relates to a rotating air sealing device for fluid convey pipelines. The utility model is composed of a joint body, a pressure plate, a support flange, an upper pipe, a flow guide pipe, an upper anti-friction ring, a lower anti-friction ring, etc. The utility model is characterized in that the upper pipe and the inner cavity of the flow guide pipe form a communicated venturi pipe-shaped channel; the flow guide pipe is the front half part of the venturi pipe-shaped channel, and the upper pipe is the back half part of the venturi pipe-shaped channel. The utility model has the advantages of good sealing performance, flexible rotation and small wearing. The utility model is especially suitable for the central rotary joint of the water delivery pipe of the super-efficiency shallow-layer air flotation water treatment device.

Description

A kind of rotating sealing device

The utility model relates to a kind of rotating sealing device that is used for fluid-transporting tubing.

Existing rotary seal joint mainly contains two kinds, and a kind of is face seals, constitutes two Sealings of sealing surface in its basic structure, and the pressure of dependence spring or other elastic element is close together and realizes sealing.Its major advantage is owing to adopt wear-resisting hard sealing material, as pottery, cemented carbide etc., can work under the unlubricated condition, and working life is longer; Its major defect is that resistance is big, can not bear and radially reach axial force, adds location bearing and axial thrust bearing otherwise must add the footpath, thereby complex structure, and volume is big, because the required precision height is made in end face seal, manufacture difficulty is big, the cost height again.Another kind is an elastic seal ring sealing structure device, it is a supporting member with the rubbing surface, bears and radially reaches axial force, forms contact seal with elastic seal ring, its advantage is simple in structure, make easily, volume is also less, but no matter adopt metal--metal friction is paid, or metal one self lubricating material fastness, working life is all very short, needs frequent maintain and replace seal ring, and the equipment that is not suitable for long-term uninterrupted running uses.

The purpose of this utility model provides a kind of good seal performance, the rotating sealing device of long service life.

The utility model comprises fittings body 6, support flange 7 in the pressing plate 9 of fittings body 6 bottoms and the fittings body 6, support flange 7 tops are provided with pipe 1, the bottom is provided with honeycomb duct 10, the inner chamber of last pipe 1 and honeycomb duct 10 is formed a Venturi tube annular channel that is communicated with, honeycomb duct 10 is the first half of venturi-shaped passage, on manage 1 latter half of for the venturi-shaped passage.The flange edge top and the bottom of the utility model support flange 7 outsides are provided with anti-friction ring 5 and following anti-friction ring 8 respectively, and bolt 2 is adjusted in gapped adjustment ring 3 in the top of last antifriction ring 5 and gap.Last anti-friction ring 5 and following antifriction 8 can be made by the phenolic aldehyde laminating sheet.

It is that the pressure of pipeline inner fluid is greater than external atmospheric pressure that rotating sealing device produces the main cause sew.Under the pressure difference effect, tube fluid through the gap of swivel joint to external leakage.Pressure difference is bigger, and the gap is bigger, and leakage is more serious, otherwise littler.The utility model is because last pipe becomes a Venturi tube with the honeycomb duct combination of lumens, utilize Venturi tube effect, make the hydrodynamic pressure of swivel joint relative movement gap location be lower than external atmospheric pressure, partial vacuum does not appear when working near the gap, but formation vortex flow, the a little higher than atmospheric pressure of its pressure, though there is indivisible liquid to ooze out from the gap, and liquid body exudate is subjected to, following anti-friction ring stops, particularly when anti-friction ring is made for the phenolic aldehyde laminating sheet, because the phenolic resin possess hydrophilic property, adsorbed water molecule and form the water lubrication film will constitute the extremely low water lubriucated bearing of friction factor.So this practical going slick, it is little to wear and tear, long service life, and good seal performance, the maintenance amount is low, and the water-treating equipment that are particularly suitable for long-term non-stop run use.

Accompanying drawing 1 is the utility model example structure schematic representation.

Among the figure, the last pipe of 1-, 2-gap adjust anti-friction ring under bolt, 3-gap adjustment ring, 4-connecting bolt, the last anti-friction ring of 5-, 6-fittings body, 7-support flange, the 8-, 9-pressing plate, 10-honeycomb duct, 11-connecting bolt, 12-liquid inlet pipe, 12 '-drain pipe.

Further describe structure of the present utility model and working principle below in conjunction with accompanying drawing.

Referring to accompanying drawing, on manage 1 and the intracavity inter-connection of honeycomb duct 10, and be combined into a venturi-shaped passage that connects.Honeycomb duct 10 inner chambers are venturi-shaped passage first half, i.e. fluid input part.The concrete shape of its inner chamber can be a vertex of a cone to the garden of the fluid flow direction conical surface, its cone angle can be decided as required as calculated, the conical surface should be big as far as possible, the effect of the conical surface is that fluid is quickened gradually equably, conical surface top is the garden cylinder of certain value, and effect is to make the fluid after the conical surface quickens become stable following current.Top is the inversion garden conical surface that a cone angle and length are arranged again, effect be make jet be scattering garden awl upwards spray, to seal the garden post joint of managing 1 inner chamber.The garden is a shoulder outside the top of honeycomb duct 10, so that fixed bearing flange 7.Support flange 7 by interior garden and plane positioning on honeycomb duct 10, and fastening with spring washer and connecting bolt 11.The two sides of support flange 7 all is processed with annular shoulder, last anti-friction ring 5 and down the interference fit of anti-friction ring 8 by endoporus be separately fixed on this shoulder, just upper and lower anti-friction ring exposes the radial support face that axially reaches that plane and outer garden face thereof have constituted this swivel joint respectively.

Last pipe 1 inner chamber is the latter half of of venturi-shaped passage, i.e. fluid output portion, and its cavity shape is two cone angles and the relative garden conical surface of the vertex of a cone.Two conical surfaces are connected to each other by one section garden cylinder of deciding diameter.The bottom conical surface plays guide functions, and the top conical surface plays diffusion action.The place, garden is processed with a little annular shoulder outside last pipe 1 lower end, accurately to locate with fittings body 6.Last pipe 1 can be welded into permanent the connection with fittings body 6.

Pressing plate 9 is an annular pressing plate, and place, last plane is processed with annular shoulder, can realize the location on fittings body 6 imperial palace garden faces, and with connecting bolt 4 and spring washer the two is fixed together.Leave suitable matching gap between the outer garden face of the imperial palace garden cylinder of fittings body 6 and last anti-friction ring 5, following anti-friction ring 8, to guarantee successfully to realize relative rotary motion between the two.Gap adjustment ring 3 can move up and down, and it is can regulate axial clearance of the present utility model that rotary gap is adjusted bolt 2.

Honeycomb duct 10 can be integrally welded with the drain pipe 12 of equipment when the utility model used, on manage 1 can be integrally welded with the liquid inlet pipe 12 of equipment.The utility model is specially adapted to the conduit pipe centre revolving joint of super efficiency shallow air flotation water-treating equipment.

Claims

1, a kind of rotating sealing device, comprise the pressing plate (9) of fittings body (6), fittings body (6) bottom and the support flange (7) in the fittings body (6), it is characterized by that support flange (7) top is provided with pipe (1), the bottom is provided with honeycomb duct (10), the inner chamber of last pipe (1) and honeycomb duct (10) is formed a venturi-shaped passage that is communicated with, honeycomb duct (10) is the first half of venturi-shaped passage, and last pipe (1) is the latter half of of venturi channel.

2, by the described a kind of rotating sealing device of claim 1, the flange edge top and the bottom that it is characterized by support flange (7) have last anti-friction ring (5) and following anti-friction ring (8) respectively, and bolt (2) is adjusted in gapped adjustment ring in the top of last anti-friction ring (5) (3) and gap.

3,, it is characterized by said upward anti-friction ring (5) and following anti-friction ring (8) and make by phenolic laminated sheet by the described a kind of rotating sealing device of claim 1.