CN206361154U - A kind of Honeycomb Steam seal component - Google Patents

Abstract

The utility model discloses a kind of Honeycomb Steam seal component, including seal and with broach axle sleeve；Seal is arranged in sealing shroud, seal is provided with honeycomb seals and brush seal, the cellular band that honeycomb seals are set on seal is constituted, brush seal is located at the both sides of cellular band, and the bristle tuft of brush seal is higher than cellular band, bristle tuft is fixed by supporting member, and supporting member is fixed in the annular groove of seal；Band broach sleeve outer surface is provided with some annular cutting edge broach, and annular cutting edge broach is embedded in seal, and the external diameter of annular cutting edge broach is more than the internal diameter of seal.The utility model on the premise of the seal clearance of original honeycomb seal is not increased, effectively reduces the influence of ventilative effect by the way that annular cutting edge broach is embedded in seal；The utility model is compared with honeycomb adds the combined labyrinth and carbon gland of broach, and effective seal length is longer, and sealing effectiveness is more preferable.

Description

A kind of Honeycomb Steam seal component

Technical field

The utility model is related to technical field of sealing technology, and in particular to a kind of Honeycomb Steam seal component.

Background technology

For equipment such as steam turbine, combustion gas turbine, centrifugal compressor, air blowers, with the gas of shaft end between its grade （Gas）In sealing, labyrinth seal is generally used, and labyrinth seal includes two kinds of structure types of labyrinth seal and honeycomb seal.

For labyrinth seal, by the air-flow of sealing, its kinetic energy can be wholly converted into heat energy in expanding chamber, i.e., false Determine progressive speed when gas flows to next sealing and be equal to zero, but this simply just sets up when expanding chamber is especially broad and especially long , and in general straight-through labyrinth, due to that can only be spread by the air-flow after sealing to side, air-flow can not in expanding chamber It is sufficiently carried out energy conversion（Kinetic energy → heat energy）, and the fraction speed by smooth wall side will not reduce or can only omit To reduce, and it is directed across each tooth top and flows to low-pressure side, the passing phenomenon of this air-flow is referred to as ventilative effect, and saturating Gas effect is then to influence the main factor of labyrinth seal effect.For honeycomb seal, its be primarily directed to high temperature and Sealing under High Pressure Difference operating mode, although its have it is wear-resistant, do not hinder axle, long lifespan, the spies such as sub- asynchronous vibration and dehumidifying can be reduced Point, but because honeycomb seal has seal clearance, so that cause leakage rate higher, and honeycomb seal equally can be by ventilative effect Influence.

Therefore, as country is to energy-saving and reduction discharge requirement more and more higher, how one is entered under existence conditions Step reduction leakage rate, while improving equipment operating efficiency, it has also become need the problem of breakthrough in honeycomb seal application badly.

Utility model content

The purpose of this utility model is to provide a kind of Honeycomb Steam seal component, can effectively reduce the influence of ventilative effect, Sealing effectiveness is improved, and improves equipment operating efficiency and reduction equipment energy consumption.

For up to above-mentioned purpose, the technical scheme that the utility model is used is：A kind of Honeycomb Steam seal component is provided, including Seal and with broach axle sleeve；Seal is arranged in sealing shroud, and seal is provided with honeycomb seals and brush seal, The cellular band that honeycomb seals are set on seal is constituted, and brush seal is located at the both sides of cellular band, and brush seal The bristle tuft of part is higher than cellular band, and bristle tuft is fixed by supporting member, and supporting member is fixed in the annular groove of seal；Band comb shaft Set outer surface is provided with some annular cutting edge broach, and annular cutting edge broach is embedded in seal, the external diameter of annular cutting edge broach More than the internal diameter of seal.

It is preferred that, band broach axle sleeve is fixedly set on equipment rotating shaft.

It is preferred that, supporting member is fixed by screws in the annular groove of seal.

It is preferred that, the shoulder of seal is arranged in the cell body of sealing shroud.

It is preferred that, the difference of the internal diameter of annular cutting edge broach external diameter and seal is 0.2mm~0.5mm.

In summary, the utility model has advantages below：

1st, the utility model is not increasing the close of original honeycomb seal by the way that annular cutting edge broach is embedded in seal On the premise of sealing gap, the influence of ventilative effect is effectively reduced；The utility model adds the combined labyrinth and carbon gland phase of broach with honeycomb Than effective seal length is longer, and sealing effectiveness is more preferable.

2nd, by setting brush seal on the side of seal, brush seal and the organic knot of honeycomb seals are made Altogether, and the free end of brush seal is higher than cellular band, form overall seal assembly, it is when in use, brush close Sealing is directly contacted with broach boss surfaces, it is to avoid honeycomb seals directly contact the damage caused to equipment rotating shaft, and Because the cellular band of honeycomb seals is clipped between brush seal, overcomes brush seal and bear the small deficiency of pressure difference.Should Seal component architecture is simple, easy to assembly, and cost is low, be conducive to improve mechanical efficiency, reduction maintenance cost, save the energy and Environmental protection.

Brief description of the drawings

Fig. 1 is the schematic diagram of the utility model Honeycomb Steam seal component；

Wherein, 1, seal；2nd, sealing shroud；3rd, supporting member；4th, shoulder；5th, screw；6th, bristle tuft；7th, cellular band；8th, ring Shape cutting edge broach；9th, band broach axle sleeve；10th, equipment rotating shaft.

Embodiment

Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.

In one embodiment of the present utility model, as shown in Figure 1 there is provided a kind of Honeycomb Steam seal component, including sealing Body 1 and with broach axle sleeve 9；Seal 1 is arranged in sealing shroud 2, and seal 1 is provided with honeycomb seals and brush seal Part, the cellular band 7 that honeycomb seals are set on seal 1 is constituted, and brush seal is located at the both sides of cellular band 7, and brushes The bristle tuft 6 of formula seal is higher than cellular band 7, and bristle tuft 6 is fixed by supporting member 3, and supporting member 3 is fixed on the annular of seal 1 In groove；The outer surface of band broach axle sleeve 9 is provided with some annular cutting edge broach 8, and annular cutting edge broach 8 is embedded in seal 1, ring The external diameter of shape cutting edge broach 8 is more than the internal diameter of seal 1.

Optimal enforcement example of the present utility model, band broach axle sleeve 9 is fixedly set on equipment rotating shaft 10；Supporting member 3 passes through Screw 5 is fixed in the annular groove of seal 1；The shoulder 4 of seal 1 is arranged in the cell body of sealing shroud 5；Annular cutting edge broach The difference of the internal diameter of 8 external diameters and seal 1 is 0.2mm~0.5mm.

Cellular band 7 is connected by vacuum brazing with seal 1, is arranged on the middle part of seal 1, the both sides of cellular band 7 Seal 1 on brush seal is set, the free end of the bristle tuft 6 of brush seal is higher than the sealing surface of cellular band 7, typically 2~5mm is higher by, brush seal is arranged at intervals and constitutes overall seal assembly in the axial direction with honeycomb seals.

Brush seal is the bristle tuft 6 being gathered into by many bristles, and bristle tuft 6 is fixed on supporting member 3, bristle tuft 6 Free end be higher than supporting member 3, to be contacted with band broach axle sleeve 9, between bristle tuft 6 and supporting member 3 by argon arc welding or The modes such as electron beam weldering are connected；In the annular groove that supporting member 3 is fixed on to seal 1 by screw 3, during actual setting, bristle Beam 6 is to same direction in 30 °~60 ° inclinations, and when being looked up from axle, the bristle of brush seal is in a helical form, and After seal assembly assembling, make the hand of spiral of bristle tuft 6 consistent with the rotation direction of equipment rotating shaft 10, it is ensured that brush close The life-span of sealing and sealing effectiveness, also the rotation of reason equipment rotating shaft 10 does not cause damage to the bristle tuft of brush seal.

It is embedded in by annular cutting edge broach 8 in seal 1, in the premise for the seal clearance for not increasing original honeycomb seal Under, effectively reduce the influence of ventilative effect；Compared with the combined labyrinth and carbon gland of honeycomb plus broach, effective seal length is longer, and Sealing effectiveness is more preferable.

Although being described in detail with reference to accompanying drawing to embodiment of the present utility model, it should not be construed as pair The restriction of the protection domain of this patent.In the scope described by claims, those skilled in the art are without creative labor The dynamic various modification and variation that can be made still belong to the protection domain of this patent.

Claims (5)

1. a kind of Honeycomb Steam seal component, it is characterised in that：Including seal（1）And with broach axle sleeve（9）；The seal （1）Installed in sealing shroud（2）It is interior, the seal（1）Honeycomb seals and brush seal are provided with, honeycomb seals are by close The cellular band set on envelope body（7）Constitute, brush seal is located at cellular band（7）Both sides, and the bristle of brush seal Beam（6）Higher than cellular band（7）, the bristle tuft（6）By supporting member（3）It is fixed, the supporting member（3）It is fixed on seal（1） Annular groove in；The band broach axle sleeve（9）Outer surface is provided with some annular cutting edge broach（8）, the annular cutting edge broach （8）It is embedded in seal（1）It is interior, the annular cutting edge broach（8）External diameter be more than seal internal diameter.

2. Honeycomb Steam seal component as claimed in claim 1, it is characterised in that：The band broach axle sleeve（9）It is fixedly set in Equipment rotating shaft（10）On.

3. Honeycomb Steam seal component as claimed in claim 1, it is characterised in that：The supporting member（3）Pass through screw（5）It is fixed In seal（1）Annular groove in.

4. Honeycomb Steam seal component as claimed in claim 1, it is characterised in that：The seal（1）Shoulder（4）It is arranged on Sealing shroud（2）Cell body in.

5. Honeycomb Steam seal component as claimed in claim 1, it is characterised in that：The annular cutting edge broach（8）External diameter with it is close The difference for sealing the internal diameter of body is 0.2mm~0.5mm.